WO2019230663A1 - Light source unit - Google Patents

Light source unit Download PDF

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Publication number
WO2019230663A1
WO2019230663A1 PCT/JP2019/020937 JP2019020937W WO2019230663A1 WO 2019230663 A1 WO2019230663 A1 WO 2019230663A1 JP 2019020937 W JP2019020937 W JP 2019020937W WO 2019230663 A1 WO2019230663 A1 WO 2019230663A1
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WO
WIPO (PCT)
Prior art keywords
shade
light source
magnetic
electromagnet
contact
Prior art date
Application number
PCT/JP2019/020937
Other languages
French (fr)
Japanese (ja)
Inventor
一磨 望月
Original Assignee
株式会社小糸製作所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社小糸製作所 filed Critical 株式会社小糸製作所
Priority to JP2020522187A priority Critical patent/JPWO2019230663A1/en
Publication of WO2019230663A1 publication Critical patent/WO2019230663A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/147—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/68—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on screens
    • F21S41/683—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on screens by moving screens
    • F21S41/689—Flaps, i.e. screens pivoting around one of their edges
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
    • F21V14/08—Controlling the distribution of the light emitted by adjustment of elements by movement of the screens or filters

Definitions

  • the present invention relates to a light source unit, and specifically to a light source unit capable of changing light distribution.
  • a headlight for an automobile is known that can change emitted light into a low beam that illuminates the front at night and a high beam that illuminates far away from the low beam.
  • Patent Document 1 listed below describes such a vehicular lamp.
  • the light source unit of the vehicle lamp described in Patent Document 1 below includes a shade that is supported rotatably and blocks a part of light emitted from the light source, and an electromagnet having a core.
  • the shade is provided with a magnetic portion made of a magnetic material, and the shade is rotated by the magnetic force of the electromagnet acting on the magnetic portion of the shade.
  • the shade is rotated so that the light shielding range by the shade is changed, and the emitted light can be changed between the low beam and the high beam.
  • the shade is positioned by biasing the shade against the fixed stopper by the magnetic force of the electromagnet acting on the magnetic portion of the shade. At this time, the magnetic portion of the shade and the core of the electromagnet are not in contact with each other. It is said to be in contact.
  • the light source unit of the vehicle lamp described in Patent Document 2 below includes a light source, a shade that is rotatably supported by a base plate, a projection lens, and a solenoid actuator having an electromagnet.
  • a part of the light emitted from the light source is blocked by the shade, and the other part of the light enters the projection lens and is emitted from the projection lens.
  • the force from the solenoid actuator is transmitted to the shade through a link member that is rotatably supported by the base plate, and the shade is rotated. By rotating the shade, the light shielding range by the shade is changed, and the light emitted from the projection lens can be changed into a low beam and a high beam.
  • the entire core of the electromagnet in the link member and the solenoid actuator is located between the projection lens and the base plate.
  • a light source unit includes a light source, a shade that includes a magnetic portion including a magnetic body, blocks a part of light emitted from the light source, and is movable in a predetermined direction, and a magnetic body And an electromagnet having a positioning member including: the magnetic part of the shade is brought into contact with the positioning member of the electromagnet by the magnetic force of the electromagnet.
  • the shade that can be moved in a predetermined direction has a magnetic part including a magnetic body. Therefore, when the electromagnet is energized, the magnetic force of the electromagnet is applied to the magnetic part of the shade.
  • the shade can be moved in a predetermined direction by acting. Since this shade blocks a part of the light emitted from the light source, the light shielding range by the shade can be changed by moving the shade. For this reason, the light source unit can change the light distribution pattern.
  • the magnetic force of the electromagnet tends to become weaker when it is separated from a member including the magnetic body of the electromagnet, such as a core or a yoke.
  • the magnetic part of the shade is brought into contact with the positioning member including the magnetic body in the electromagnet by the magnetic force of the electromagnet. For this reason, compared with the case where the magnetic part of the shade does not contact the member including the magnetic body in the electromagnet as in the light source unit described in Patent Document 1, a strong magnetic force acts on the magnetic part of the shade, and the shade is It is possible to position it while holding it more firmly. For this reason, even if it is a case where a light source unit vibrates, it can suppress that the position of the shade with respect to an electromagnet shifts, and can suppress the change of the light distribution pattern which is not intended.
  • the positioning member include an electromagnet core and a yoke.
  • the positioning member may have an elastic body, and the magnetic part may be in contact with the elastic body.
  • the magnetic part may have an elastic body, and the elastic body may be in contact with the positioning member.
  • the magnetic body in the magnetic part may be in contact with the magnetic body in the positioning member.
  • the magnetic flux is diffused between these members.
  • a member that generates magnetic force and a member made of a magnetic material are in direct contact with each other, diffusion of magnetic flux between these members is suppressed, and a stronger magnetic force acts on the member made of a magnetic material.
  • the positioning member since the positioning member includes a magnetic body, a magnetic field is concentrated on the magnetic body in the positioning member, and the magnetic body in the magnetic portion is directly applied to the magnetic body in the positioning member where such magnetic field concentration occurs. Abut.
  • the magnetic part includes a contact part that includes the magnetic body in the magnetic part and is in contact with the positioning member, and a state in which the contact part including the magnetic body in the magnetic part and the positioning member are most separated from each other. It is preferable that the guide portion protrudes toward the positioning member with respect to the contact portion, and the guide portion is not in contact with the positioning member.
  • the contact portion and the positioning portion can be appropriately brought into contact with each other.
  • the guiding portion protrudes closer to the positioning member than the contact portion when the magnetic portion and the positioning member are farthest apart, the leading end portion of the guiding portion including the magnetic body is positioned more than the contact portion including the magnetic body. Located on the member side. For this reason, in such a state, a stronger magnetic force can act on the guide portion than on the contact portion. For this reason, compared with the case where it does not have such a guidance part, stronger magnetic force can be made to act on a magnetic part in the state where a magnetic part and a positioning member were most separated. Therefore, the electromagnet can be reduced in size.
  • the light source unit further includes an urging member, and the shade is rotatable, and the urging member urges the shade in a direction of rotation so that the magnetic portion is separated from the positioning member.
  • the center of gravity of the shade may be positioned on the rotation axis of the shade.
  • the shade is rotated by the magnetic force of the electromagnet resisting the urging force of the urging member, and the magnetic portion is brought into contact with the positioning member. Further, by making the electromagnet in a non-energized state, the shade can be rotated so that the magnetic portion is separated from the positioning member by the urging force of the urging member, and the shade can be held at a predetermined rotation position.
  • the light distribution can be switched by switching between energization and non-energization of the electromagnet.
  • the centroid of the shade is smaller than the case where the center of gravity of the shade is not located on the rotation axis of the shade.
  • the shade can be rotated and the shade can be rotated with a small magnetic force. Therefore, the electromagnet can be reduced in size.
  • the magnetic part and the positioning member may have contact surfaces that contact each other.
  • the shade can be held more stably than in the case of no surface contact.
  • the positioning member When the magnetic part and the positioning member each have a contact surface, the positioning member extends along the extending direction of the coil outside the coil of the electromagnet, and the end of the positioning member on the magnetic part side
  • the part may be bent to the opposite side to the coil side so that the cross-sectional shape is L-shaped, and the surface on the magnetic part side at the end part may be the contact surface.
  • a light source unit includes a base plate, a light source disposed on one side with respect to the base plate, and one of light emitted from the light source supported by the base plate so as to be movable in a predetermined direction.
  • the center of one end is located on the light source side with respect to the base plate.
  • the shade is movable in a predetermined direction and is moved using the magnetic force of the electromagnet. Since this shade blocks a part of the light emitted from the light source, the shading range by the shade can be changed by moving the shade. For this reason, the light source unit can change the light distribution pattern of the light emitted from the projection lens. Further, as described above, the center of one end of the core of the electromagnet is located on the light source side with respect to the projection lens side surface of the base plate.
  • the protrusion amount of the part which protrudes in the projection lens side rather than the base plate in an electromagnet can be made smaller.
  • the projection lens can be brought close to the base plate and can be miniaturized.
  • the light source side focal point of the projection lens approaches the light source.
  • the focal length of the projection lens is shortened, the radius of curvature of at least one of the entrance surface and the exit surface of the projection lens becomes small, so that the outer diameter of the projection lens can be made small. Therefore, the light source unit can be downsized.
  • the electromagnet is arranged so that the extending direction of the core is parallel to the surface direction of the base plate.
  • Electromagnets generally tend to be long in the core extending direction.
  • the electromagnet is disposed such that the extending direction of the core is parallel to the surface direction of the base plate. For this reason, compared with the case where the electromagnet is arrange
  • the light source unit further includes an urging member, and the shade is rotatable and rotated in a predetermined direction using the magnetic force of the electromagnet.
  • the urging member urges the shade in a direction opposite to the direction of rotation using the magnetic force of the electromagnet, and the center of gravity of the shade may be located on the rotation axis of the shade. .
  • the shade when the shade is rotated using the magnetic force of the electromagnet, the shade is rotated in a predetermined direction by the force applied to the shade resisting the urging force of the urging member. It can be held in a pivot position. Moreover, by making the electromagnet in a non-energized state, the shade can be rotated in the direction opposite to the predetermined direction by the urging force of the urging member, and the shade can be held at another predetermined rotation position.
  • the light distribution can be switched by switching between energization and non-energization of the electromagnet.
  • the centroid of the shade is smaller than the case where the center of gravity of the shade is not located on the rotation axis of the shade.
  • the shade can be rotated and the shade can be rotated with a small magnetic force. Therefore, the electromagnet can be reduced in size.
  • the shade may have a magnetic part including a magnetic body.
  • the shade can be moved in a predetermined direction by applying the magnetic force of the electromagnet to the magnetic part including the magnetic body in the shade by energizing the electromagnet. For this reason, the shade can be moved without using a link member that transmits the force generated by the magnetic force of the electromagnet to the shade. For this reason, it can suppress that a number of parts increases compared with the light source unit of the above-mentioned patent documents 2.
  • the light source unit further includes a reflecting member that moves in a predetermined direction according to the movement of the shade between the base plate and the projection lens, and the reflecting member includes: A part of the light emitted from the light source that is different from the light directed toward the base plate side surface of the projection lens may be reflected and incident on the base plate side surface of the projection lens.
  • the reflection member reflects a part of the light emitted from the light source, which is different from the light directed to the surface on the base plate side of the projection lens, and is on the base plate side of the projection lens. Incident on the surface. Further, the reflecting member moves in a predetermined direction in accordance with the movement of the shade. For this reason, by moving the shade, the light shielding range by the shade can be changed, and the amount of light reflected by the reflecting member and incident on the projection lens and the position where this light enters the projection lens can be changed. For this reason, the said light source unit can improve the freedom degree of the light distribution pattern which can be formed compared with the case where a reflection member is not provided.
  • the projection lens and the electromagnet are compared with the case where the entire electromagnet core is located between the projection lens and the base plate. A large space can be formed between the two. For this reason, the said light source unit can enlarge a reflection member, and can improve the utilization efficiency of the light radiate
  • FIG. 1 It is sectional drawing which shows roughly the vehicle lamp in embodiment of this invention. It is the figure which expanded the light source unit of FIG. It is a perspective view of a base plate, a shade, and an electromagnet shown in FIG. It is a perspective view which decomposes
  • FIG. 1 is a cross-sectional view schematically showing a vehicular lamp in the present embodiment, and is a vertical cross-sectional view of the vehicular lamp.
  • the vehicular lamp is the headlamp 1.
  • the headlamps are generally provided in the left and right directions in front of the vehicle, and the left and right headlamps are generally symmetrical in the left and right directions. Therefore, in this embodiment, one headlamp will be described.
  • the headlamp 1 of this embodiment includes a housing 2 and a light source unit 3 as main components.
  • the housing 2 includes a lamp housing 11, a front cover 12, and a back cover 13 as main components.
  • the front of the lamp housing 11 is open, and a colorless and translucent front cover 12 is fixed to the lamp housing 11 so as to close the opening.
  • An opening smaller than the front is formed in the rear of the lamp housing 11, and the back cover 13 is fixed to the lamp housing 11 so as to close the opening.
  • an internal space 14 surrounded by the lamp housing 11, the front cover 12, and the back cover 13 is formed.
  • the light source unit 3 is accommodated in the internal space 14.
  • the light source unit 3 of this embodiment includes a base plate 20, a light source 30, a light emission control circuit 35, a heat sink 40, a reflector 50, a projection lens 60, a shade 70, and an electromagnet 80 as main components.
  • FIG. 2 is an enlarged view of the light source unit of FIG.
  • the base plate 20 is a metal plate-like member extending substantially in the vertical direction, and is fixed to the housing 2 by means (not shown).
  • the base plate 20 is formed with a first opening 21 and a second opening 22 that penetrate the base plate 20.
  • the first opening 21 is located on the optical path through which the light emitted from the light source 30 passes.
  • the second opening 22 is located below the first opening 21.
  • the second opening 22 is connected to the first opening 21, and the first opening 21 and the second opening 22 communicate with each other. .
  • the opening direction of these openings 21 and 22 is the front-rear direction.
  • the light source 30 is a light emitting element that emits light, for example, an LED that emits white light.
  • the light emission of the light source 30 is controlled by the light emission control circuit 35.
  • the heat sink 40 is disposed on the rear side of the base plate 20 and is fixed to the base plate 20 by means (not shown).
  • the heat sink 40 is made of, for example, a metal material, and includes a plate-like base portion 41 that extends substantially in the horizontal direction, and a plate-like rear wall portion 42 that extends substantially perpendicular to the base portion 41 and extends in the left-right direction. .
  • the rear wall portion 42 is positioned on the upper surface side of the base portion 41, the lower end portion of the rear wall portion 42 is connected to the rear end portion of the base portion 41, and the base portion 41 and the rear wall portion 42 are integrally formed. ing.
  • a plurality of heat radiation fins 43 are formed integrally with the base portion 41 on the lower surface side of the base portion 41.
  • a plurality of heat radiation fins 44 are also formed integrally with the rear wall 42 on the rear surface side of the rear wall 42.
  • the light source 30 is placed on an end surface of a pedestal 45 formed on the front side of the rear wall 42 on the upper surface of the base portion 41.
  • the light emission control circuit 35 is disposed below the heat radiating fins 43 and is fixed to the heat sink 40.
  • the reflector 50 is a curved plate-like member, and is fixed to the base portion 41 of the heat sink 40 so as to cover the light source 30 from the upper side in front of the rear wall portion 42 in the heat sink 40.
  • the reflector 50 includes a low beam reflector 51, a high beam reflector 52, and a sub reflector 53.
  • the high beam reflector 52 is disposed closer to the base 41 than the low beam reflector 51.
  • the surface on the light source 30 side in the low beam reflector 51 is a low beam reflecting surface 51R
  • the surface on the light source 30 side in the high beam reflector 52 is a high beam reflecting surface 52R.
  • Each of the low beam reflection surface 51R and the high beam reflection surface 52R is based on a spheroidal curved surface.
  • the position of the first focal point of the elliptic curved surface on the low beam reflecting surface 51R is slightly different from the position of the first focal point of the elliptic curved surface on the high beam reflecting surface 52R.
  • the light source 30 is located in the vicinity of the position of the first focal point of the elliptical curved surface of the low beam reflecting surface 51R and the position of the first focal point of the elliptical curved surface of the high beam reflective surface 52R. A part of the light emitted from the light source 30 is reflected toward the projection lens 60 by the low beam reflecting surface 51R of the low beam reflector 51 and the high beam reflecting surface 52R of the high beam reflector 52.
  • the sub-reflector 53 extends forward from the upper end portion on the front side of the low beam reflector 51, and is located on the opposite side of the base portion 41 side from the low beam reflector 51.
  • the surface on the light source 30 side of the sub reflector 53 is a sub reflection surface 53R, and a part of the light emitted from the light source 30 is reflected to the projection lens 60 side by the sub reflection surface 53R of the sub reflector 53. Light does not enter the projection lens 60 directly.
  • the projection lens 60 is an aspherical biconvex lens, is disposed on the front side of the base plate 20, and is fixed to the base plate 20 via a lens holder 61.
  • the surface on the base plate 20 side is a convex incident surface 62 that swells toward the base plate 20, and the surface opposite to the base plate 20 side is a convex exit surface 63 that swells on the opposite side to the base plate 20 side. Is done.
  • the rear focal point which is the focal point of the projection lens 60 on the light source 30 side, is the position of the first focal point of the elliptical curved surface of the low beam reflecting surface 51R and the position of the first focal point of the elliptical curved surface of the high beam reflecting surface 52R.
  • the projection lens 60 is disposed so as to be located in the vicinity of the. That is, in the light source unit 3 of the present embodiment, a PES (Projector Ellipsoid System) optical system is employed.
  • the projection lens 60 is not limited to an aspherical biconvex lens, and may be an aspherical planoconvex lens in which the incident surface 62 is a flat surface, for example.
  • FIG. 3 is a perspective view of the base plate, shade, and electromagnet shown in FIG. 1
  • FIG. 4 is an exploded perspective view of the base plate, shade, and electromagnet. 1 to 3 show a state in which the electromagnet 80 is in a non-energized state.
  • the boundary between the first opening 21 and the second opening 22 in the base plate 20 is indicated by a broken line. Yes.
  • the shade 70 has a main body 71 and a reflecting portion 72.
  • the main body 71 has a light shielding part 73, a pair of connection parts 74, a magnetic part 75 made of a magnetic material, and a locking part 76.
  • the light shielding portion 73, the pair of connection portions 74, the magnetic portion 75, and the locking portion 76 are integrally formed by bending a plate-like member made of a magnetic material.
  • a magnetic body iron, cobalt, nickel etc. are mentioned, for example.
  • FIG. 5 is a perspective view of the main body of the shade.
  • the light shielding portion 73 extends in the left-right direction, and a protrusion 73 a that protrudes forward along the extending direction of the light shielding portion 73 is formed at the upper end portion.
  • the pair of connection portions 74 are generally symmetrically configured, one connection portion 74 extends forward from one end portion in the left-right direction of the light shielding portion 73, and the other connection portion 74 is the light shielding portion 73. It extends toward the front from the other end in the left-right direction.
  • the pair of connecting portions 74 are formed with through holes 74h penetrating in the left-right direction, and the through holes 74h face each other.
  • a fixing portion 74 a extending toward the other connecting portion 74 is formed in front of the through hole 74 h in the pair of connecting portions 74.
  • a regulating projection 74b that protrudes to the opposite side of the other connecting portion 74 is formed behind and above the through hole 74h in the pair of connecting portions 74, respectively.
  • the magnetic part 75 has a contact part 77 and a pair of guide parts 78.
  • the contact portion 77 extends forward and downward from the lower end portion of the light shielding portion 73.
  • a lower surface of the contact portion 77 is a flat contact surface 77 s along the extending direction of the contact portion 77.
  • One guide portion 78 of the pair of guide portions 78 protrudes downward from one end portion of the contact portion 77 in the left-right direction.
  • the other guide portion 78 protrudes downward from the other end portion of the contact portion 77 in the left-right direction.
  • the magnetic part 75 may not have the guiding part 78.
  • the locking part 76 extends forward from the lower end of the light shielding part 73. Such a magnetic part 75 and the locking part 76 do not overlap with the through hole 74h when viewed from the through direction in the through hole 74h of the connection part 74.
  • the front end of the magnetic part 75 is located behind the fixing part 74 a of the connection part 74 and below the through hole 74 h, and the front end of the locking part 76 is connected to the connection part 74. It is located behind the through hole 74h.
  • the reflecting portion 72 is a plate-like member extending in the left-right direction, one end in the extending direction is fixed to the fixing portion 74a of one connecting portion 74, and the other end is fixed to the other connecting portion 74. It is fixed to the part 74a. For this reason, the part which consists of the light-shielding part 73 in the shade 70, a pair of connection part 74, and the reflection part 72 is formed in frame shape, and the intensity
  • the surface of the reflecting portion 72 opposite to the main body portion 71 is a reflecting surface 72R that reflects light.
  • the reflecting surface 72R is a curved surface that is inclined downward toward the front and curved convexly toward the main body 71 side. For this reason, it can be understood that the reflecting portion 72 is a reflecting member having the reflecting surface 72 ⁇ / b> R and is a part of the shade 70.
  • such a shade 70 can be rotated about the shaft 25 by inserting the columnar shaft 25 into the through holes 74 h of the pair of connection portions 74.
  • the In the present embodiment, the center of gravity of the shade 70 is located on the central axis of the shaft 25. Further, the contact surface 77 s of the contact portion 77 in the magnetic portion 75 is parallel to the extending direction of the shaft 25.
  • the shaft 25 inserted into the through hole 74 h in the shade 70 is fixed to the base plate 20 in this way, so that the shade 70 is rotatably supported by the base plate 20. More specifically, as shown in FIGS. 3 and 4, the base plate 20 is formed with a pair of bearing portions 23 that protrude forward, which is the projection lens 60 side.
  • the pair of bearing portions 23 are juxtaposed in the horizontal direction, and one bearing portion 23 is disposed in the vicinity of the right edge of the first opening 21 of the base plate 20, and the other bearing portion 23 is the left side of the first opening 21. It is arrange
  • the bearing portion 23 is formed by bending a part of the base plate 20, and the vertical cross-sectional shape is substantially L-shaped.
  • the shade 70 is inserted into the first opening 21, and both end portions of the shaft 25 are fixed to the bearing portion 23, so that the shade 70 is rotatably supported by the base plate 20.
  • the shaft 25 fixed to the bearing portion 23 extends in the horizontal direction along the surface direction of the base plate 20, and the shade 70 is connected to the base plate 20. It can be rotated about the direction extending in the horizontal direction along the surface direction. In other words, the shade 70 is rotatable about a direction parallel and horizontal to the surface direction of the base plate 20. Further, as described above, since the center of gravity of the shade 70 is located on the central axis of the shaft 25, it can be understood that the center of gravity of the shade 70 is located on the rotation axis of the shade 70. Note that the center of gravity of the shade 70 may not be located on the rotation axis of the shade 70.
  • the light shielding portion 73 and the regulation protrusion 74 b in the main body portion 71 of the shade 70 are located closer to the light source 30 than the base plate 20, and the reflection portion 72 is the base plate 20. It is located closer to the projection lens 60 side. For this reason, the light shielding part 73 of the shade 70 is located between the light source 30 and the projection lens 60, and the light shielding part 73 blocks a part of the light from the light source 30.
  • Light emitted from the light source 30 is controlled by the light shielding unit 73 and is incident on the incident surface 62 of the projection lens 60, so that light having a light distribution pattern corresponding to the form of the light shielding unit 73 is emitted from the emission surface 63 of the projection lens 60. Is done.
  • the light emitted from the emission surface 63 of the projection lens 60 passes through the front cover 12 and is emitted toward the front of the vehicle outside the vehicle.
  • a pair of pressing portions 24 that protrude toward the light source 30 side along the pair of connection portions 74 in the main body portion 71 are formed at the edge portion of the first opening 21 of the base plate 20. Yes. For this reason, the movement in the axial direction of the shaft 25 with respect to the base plate 20 of the shade 70 is restricted.
  • the presser portion 24 is formed by bending a part of the base plate 20.
  • a torsion spring 26 is interposed between the base plate 20 and the shade 70. Specifically, the torsion spring 26 into which the shaft 25 is inserted is disposed between the pair of connection portions 74. One end of the torsion spring 26 abuts on the locking portion 76 from below and is locked to the locking portion 76, and the other end of the torsion spring 26 is near the edge of the first opening 21 of the base plate 20. Abutting from the light source 30 side, the base plate 20 is engaged. The elastic force of the torsion spring 26 acts on the shade 70 so as to rotate the shade 70 counterclockwise around the shaft 25 in FIG.
  • the regulation protrusions 74b formed on the pair of connection parts 74 are pressed from the light source 30 side in the vicinity of the edge of the first opening 21 of the base plate 20, respectively, and the shade 70 does not rotate around the shaft 25. So that it is held. Therefore, the torsion spring 26 is an urging member that urges the shade 70 in a direction in which the shade 70 rotates counterclockwise about the shaft 25 in FIG. It can be understood that it is an urging force that urges such a force.
  • the electromagnet 80 has a core 81 made of a magnetic material, a coil 82 made of a winding wound around the core 81, and a yoke 83 made of a magnetic material.
  • a magnetic body in the core 81 and the yoke 83 iron, cobalt, nickel etc. are mentioned, for example, Each magnetic body may be made into the same magnetic body mutually, and may be made into a different magnetic body.
  • the core 81 has a columnar shape extending linearly, and both end portions of the core 81 protrude from the end portions of the coils 82, respectively.
  • the diameter of the portion of the core 81 located inside the coil 82 is approximately the same diameter. Further, the diameter at one end 81a is smaller than the diameter of the portion located inside the coil 82, and the diameter at the other end 81b is larger than the diameter of the portion located inside the coil 82.
  • the coil 82 is composed of the winding wound around the cylindrical core 81 as described above, the coil 82 extends along the extending direction of the core 81.
  • the yoke 83 has a pair of plate-like side wall portions 84 and a plate-like bottom wall portion 85.
  • the pair of side wall portions 84 extend outside the coil 82 along the extending direction of the coil 82 and face each other.
  • a through hole is formed at the center of the bottom wall portion 85, and one end 81a of the core 81 is inserted into the through hole.
  • end portions on the one end portion 81 a side of the core 81 in the pair of side wall portions 84 are respectively connected.
  • the end surfaces of the pair of side wall portions 84 on the other end portion 81b side of the core 81 are located on the opposite side of the other end portion 81b of the core 81 from the bottom wall portion 85 side, and the respective end surfaces are coiled.
  • the flat contact surface 84 s is located on the same plane perpendicular to the extending direction of 82.
  • the width between the pair of side wall portions 84 is set to be smaller than the width between the pair of guide portions 78 in the shade 70.
  • the electromagnet 80 generates a magnetic force when a current is passed through the coil 82, and the magnetic body is attracted to the end of the core 81 where the magnetic field is concentrated or the end of the pair of side walls 84 of the yoke 83.
  • the electromagnet 80 does not generate a magnetic force.
  • the central axis CA of the core 81 extends in a direction perpendicular to the surface direction of the base plate 20 on the light source 30 side of the base plate 20. It arrange
  • the pair of side wall portions 84 of the yoke 83 extend in the front-rear and vertical directions, and the contact surfaces 84 s of the pair of side wall portions 84 of the electromagnet 80 are located closest to the contact portion 77 of the shade 70. Yes. Further, the contact surfaces 84 s of the pair of side wall portions 84 are parallel to the extending direction of the shaft 25. Further, the contact surfaces 84 s of the pair of side wall portions 84 in the yoke 83 are located in a space through which the contact portion 77 passes when the shade 70 rotates about the shaft 25, and the contact surfaces of the side wall portions 84. The normal extending from 84 s intersects the contact surface 77 s of the contact portion 77.
  • the core 81 is not arranged on the projection lens 60 side from the base plate 20. ing.
  • the electromagnet 80 is fixed to the base plate 20 by means (not shown).
  • FIG. 6 is an enlarged view of a part of FIG. 2, and is an enlarged view of the vicinity of the shade 70 and the electromagnet 80.
  • the angle formed by 84s is a line segment connecting the shaft 25 and the circle C passing through the arbitrary point P1 on the contact surface 84s with the shaft 25 as the center and the intersection P2 of the contact surface 77s in the magnetic part 75.
  • the angle between LS2 and the contact surface 77s is substantially the same.
  • the pair of guide portions 78 protrudes downward from the end portion of the contact portion 77 in the left-right direction, and the electromagnet 80 is disposed below the contact portion 77 of the shade 70.
  • the contact surfaces 84 s of the pair of side wall portions 84 of the yoke 83 are located closest to the contact portion 77 of the shade 70. For this reason, in the state shown in FIG. 2, it can be understood that the pair of guide portions 78 protrudes toward the yoke 83 of the electromagnet 80 from the contact portion 77.
  • FIG. 7 is a diagram illustrating a state where the electromagnet is in a non-energized state, and is a diagram schematically illustrating an example of an optical path of light emitted from the light source.
  • descriptions of the light emission control circuit 35 and the heat radiation fins 43 and 44 in the heat sink 40 are omitted.
  • the angle of each reflecting surface, the light reflection angle, the refraction angle, and the like may not be accurate.
  • the headlamps are provided symmetrically on the left and right sides of the vehicle. In the following description of the light distribution, the light distribution when the headlights provided on the left and right are similarly turned on or off will be described.
  • the restricting projection 74 b of the connecting portion 74 in the shade 70 is pressed against the base plate 20 from the light source 30 side by the biasing force of the torsion spring 26 that is a biasing member.
  • the shade 70 is held so as not to rotate about the shaft 25. That is, the shade 70 is positioned at a predetermined position by the urging force of the torsion spring 26 that is an urging member.
  • the white light from the light source 30 is reflected mainly by the low-beam reflecting surface 51R of the low-beam reflector 51, the high-beam reflecting surface 52R of the high-beam reflector 52, and the sub-reflecting surface 53R of the sub-reflector 53. Is done. A part of the light reflected by the low beam reflecting surface 51R and the high beam reflecting surface 52R is shielded by the light shielding portion 73 of the shade 70, and the other part of the light passes through the first opening 21 of the base plate 20. Then, the light enters the incident surface 62 of the projection lens 60 and exits from the exit surface 63.
  • the light reflected by the sub-reflecting surface 53R mainly passes through the first opening 21 of the base plate 20, most of the light crosses the projection lens 60 side from the reflection lens 72 of the shade 70 downward from above to the projection lens 60. Is not incident.
  • the light emitted from the emission surface 63 of the projection lens 60 is transmitted through the front cover 12 and emitted toward the front of the vehicle.
  • the light-shielding unit 73 of the present embodiment has a light distribution pattern from the light source 30 so that the light distribution pattern of the light emitted from the emission surface 63 of the projection lens 60 becomes a low beam distribution pattern. Block out some of the light. For this reason, a low beam is emitted from the headlamp 1.
  • FIG. 8 is a diagram showing a state where the electromagnet is energized, and is a diagram schematically showing an example of an optical path of light emitted from the light source.
  • the electromagnet 80 when the electromagnet 80 is energized, as described above, the electromagnet 80 generates a magnetic force, and the magnetic body has an end portion of the core 81 and a pair of side walls of the yoke 83 where the magnetic field is concentrated. It is attracted to the end of the portion 84.
  • the shade 70 is formed from a plate-like member made of a magnetic material.
  • the electromagnet 80 is disposed below the contact portion 77 of the shade 70, and the contact surfaces 84 s of the pair of side wall portions 84 of the electromagnet 80 are the shade 70. It is located closest to the contact portion 77. Therefore, a magnetic force acts on the shade 70 so that the shade 70 is attracted to the side where the both end portions 81b of the core 81 in the electromagnet 80 and the contact surfaces 84s of the pair of side wall portions 84 are located.
  • the magnetic force of the electromagnet 80 acting on the shade 70 resists the biasing force of the torsion spring 26, the abutment portion 77 of the shade 70 approaches the abutment surface 84 s of the pair of side wall portions 84 about the shaft 25.
  • the contact surfaces 84 s of the pair of side wall portions 84 in the yoke 83 are located in a space through which the contact portions 77 pass when the shade 70 rotates about the shaft 25. For this reason, as shown in FIG. 8, the abutting portion 77 of the magnetic portion 75 abuts against the abutting surfaces 84 s of the pair of side wall portions 84 of the yoke 83, and the shade 70 rotates around the shaft 25 by the magnetic force of the electromagnet 80. It is held so as not to move. That is, the shade 70 is positioned at another predetermined position by the magnetic force of the electromagnet 80.
  • the yoke 83 can be understood to be a positioning member with which the contact portion 77 of the magnetic portion 75 contacts when the shade 70 is positioned.
  • the width between the pair of side wall portions 84 is smaller than the width between the pair of guide portions 78 in the shade 70, and the guide portion 78 of the magnetic portion 75 of the shade 70 does not contact the yoke 83.
  • the contact portion 77 contacts the contact surfaces 84 s of the pair of side wall portions 84.
  • the line segment LS1 connecting the shaft 25 and an arbitrary point P1 on the contact surface 84s of the pair of side wall portions 84 in the yoke 83 The angle formed by the contact surface 84s is an intersection point P2 between the shaft 25 and the circle C passing through the arbitrary point P1 on the contact surface 84s with the shaft 25 as a center and the contact surface 77s of the magnetic portion 75.
  • the angle between the connecting line segment LS2 and the contact surface 77s is substantially the same.
  • the contact surface 77s of the contact portion 77 and the contact surfaces 84s of the pair of side wall portions 84 are in surface contact with each other. That is, it can be understood that the magnetic part 75 and the yoke 83 have contact surfaces 77s and 84s that contact each other.
  • the light from the light source 30 is mainly reflected by the low-beam reflecting surface 51 ⁇ / b> R of the low-beam reflector 51 and the high-beam reflecting of the high-beam reflector 52 in the same manner as when the low beam is emitted from the headlamp 1.
  • a part of the light reflected by the low beam reflecting surface 51R and the high beam reflecting surface 52R is shielded by the light shielding portion 73 of the shade 70, and the other part of the light passes through the first opening 21 of the base plate 20. Then, the light enters the incident surface 62 of the projection lens 60 and exits from the exit surface 63.
  • the light shielding portion 73 moves downward from the state shown in FIG. 7 and is tilted backward. For this reason, the position of the light shielding portion 73 with respect to the low beam reflecting surface 51R and the high beam reflecting surface 52R is changed, and the light shielding range by the light shielding portion 73 is changed. Since the reflecting portion 72 is a part of the shade 70, the reflecting portion 72 rotates in a predetermined direction between the base plate 20 and the projection lens 60 when the shade 70 rotates. Then, the reflection surface 72R of the reflection portion 72 of the shade 70 is inclined so as to approach the horizontal from the state shown in FIG. 7, the front end is positioned more forward, and the reflection surface 72R is a sub-reflection surface 53R.
  • the reflecting unit 72 reflects a part of the light emitted from the light source 30 that is different from the light directed to the incident surface 62 of the projection lens 60 and causes the light to enter the incident surface 62 of the projection lens 60.
  • the light shielding range by the light shielding unit 73 is changed and the light reflected by the reflecting surface 72R is emitted from the emission surface 63 of the projection lens 60.
  • the light distribution of the light emitted from the emission surface 63 of the projection lens 60 is distributed.
  • the pattern is different from the low beam distribution pattern.
  • the light shielding unit 73 is provided from the light source 30 so that the light distribution pattern of light emitted from the emission surface 63 of the projection lens 60 becomes a high beam light distribution pattern in a state where the shade 70 is held in this manner. A part of the light is blocked, and the reflecting surface 72R reflects the light reflected by the sub-reflecting surface 53R.
  • the shade 70 is positioned at the predetermined position shown in FIG. 7 by the urging force of the torsion spring 26 that is an urging member. . That is, in the headlamp 1 of the present embodiment, the light distribution can be switched by switching between energization and non-energization of the electromagnet 80. Further, since the shade 70 rotates between a position when the coil 82 shown in FIG. 7 is in a non-energized state and a position where the coil 82 shown in FIG. 8 is in an energized state, the coil 82 shown in FIG.
  • the state that is a state is a state in which the contact portion 77 and the yoke 83 are farthest apart.
  • the torsion spring 26 urges the shade 70 in a direction in which the magnetic part 75 rotates so as to be separated from the yoke 83. In other words, the torsion spring 26 urges the shade 70 in a direction opposite to the direction in which the torsion spring 26 is rotated using the magnetic force of the electromagnet 80.
  • the light source unit when used for, for example, a vehicle lamp, the light source unit vibrates due to the vibration of the vehicle.
  • the shade is positioned by a magnetic force as in the light source unit of Patent Document 1
  • the position of the shade is displaced, and the light distribution pattern may change unintentionally. For this reason, even when the light source unit vibrates, there is a demand for suppressing unintentional changes in the light distribution pattern.
  • the light source unit 3 of the present embodiment as the first mode includes the light source 30 and the magnetic part 75 made of a magnetic material, and blocks a part of the light emitted from the light source 30 and can move in a predetermined direction.
  • the magnetic part 75 of the shade 70 is brought into contact with the yoke 83 of the electromagnet 80 by the magnetic force of the electromagnet 80.
  • the shade 70 that can be moved in the predetermined direction has the magnetic portion 75 made of a magnetic material, so that the electromagnet is energized.
  • the shade 70 can be moved in a predetermined direction by applying the magnetic force of the electromagnet to the magnetic portion 75 of the shade 70. Since the shade 70 blocks a part of the light emitted from the light source 30, the light shielding range by the shade 70 can be changed by moving the shade 70. For this reason, a light distribution pattern can be changed.
  • the magnetic force of the electromagnet tends to become weaker when it is separated from a member including the magnetic body of the electromagnet, such as a core or a yoke.
  • the magnetic part 75 of the shade 70 is brought into contact with the yoke 83 including the magnetic body in the electromagnet 80 by the magnetic force of the electromagnet 80.
  • the magnetic part 75 of the shade 70 has a stronger magnetic force. It acts and can hold and position shade 70 more firmly. For this reason, even if it is a case where the light source unit 3 vibrates, it can suppress that the position of the shade 70 with respect to the electromagnet 80 shifts
  • the magnetic part 75 made of a magnetic body of the shade 70 is brought into contact with a yoke 83 made of a magnetic body. That is, the magnetic body in the magnetic part 75 is brought into contact with the magnetic body in the yoke 83.
  • a member that generates a magnetic force is separated from a member made of a magnetic material, or a non-magnetic material is interposed between these members, the magnetic flux is diffused between these members.
  • a member that generates magnetic force and a member made of a magnetic material are in direct contact with each other, diffusion of magnetic flux between these members is suppressed, and a stronger magnetic force acts on the member made of a magnetic material.
  • the yoke 83 is made of a magnetic material, the magnetic field is concentrated on the yoke 83, and the yoke 83 where such magnetic field concentration is generated is made of magnetic material.
  • the magnetic part 75 is directly abutted. For this reason, compared with the case where the yoke 83 made of a magnetic material and the magnetic part 75 made of a magnetic material are not in direct contact with each other, a strong magnetic force can be applied to the magnetic portion 75 of the shade 70, thereby making the shade 70 stronger. Can be held and positioned.
  • the magnetic part 75 includes a contact part 77 and a pair of guide parts 78.
  • the contact portion 77 is made of a magnetic material and is in contact with a pair of side wall portions 84 in the yoke 83.
  • the pair of guide portions 78 is made of a magnetic material and protrudes closer to the yoke 83 than the contact portion 77 when the contact portion 77 and the yoke 83 are farthest apart from each other, and is not in contact with the yoke 83. Since the pair of guide portions 78 are not in contact with the yoke 83, the contact portion 77 and the yoke 83 can be brought into contact with each other appropriately.
  • the pair of guide portions 78 protrudes closer to the yoke 83 than the contact portion 77. Therefore, the distal ends of the pair of guide portions 78 made of a magnetic material are magnetic. It is located on the yoke 83 side with respect to the contact portion 77 made of a body. For this reason, in such a state, a stronger magnetic force can act on the pair of guide portions 78 than on the contact portions 77. Therefore, a stronger magnetic force can be applied to the magnetic part 75 in a state where the magnetic part 75 and the yoke 83 are farthest apart compared to the case where the guide part 78 is not provided. Therefore, the electromagnet 80 can be reduced in size.
  • the light source unit 3 includes a torsion spring 26 that is an urging member.
  • the shade 70 is rotatable, and the torsion spring 26 urges the shade 70 in a direction in which the magnetic part 75 is rotated so as to be separated from the yoke 83.
  • the center of gravity of the shade 70 is located on the rotation axis of the shade 70.
  • the shade 70 is rotated by the magnetic force of the electromagnet 80 resisting the biasing force of the torsion spring 26, and the magnetic part 75 is brought into contact with the yoke 83.
  • the shade 70 is rotated so that the magnetic portion 75 is separated from the yoke 83 by the urging force of the torsion spring 26, and the shade 70 can be held at a predetermined rotation position.
  • the light distribution can be switched by switching between energization and non-energization of the electromagnet 80.
  • the center of gravity of the shade 70 is located on the rotation axis of the shade 70, compared to the case where the center of gravity of the shade 70 is not located on the rotation axis of the shade 70, The shade 70 can be rotated with a small biasing force, and the shade 70 can be rotated with a small magnetic force. Therefore, the electromagnet 80 can be reduced in size.
  • the magnetic part 75 and the yoke 83 have contact surfaces 77s and 84s that contact each other. For this reason, since the magnetic part 75 and the yoke 83 are in surface contact, the shade 70 can be held more stably than in the case of no surface contact.
  • the light source unit 3 of the present embodiment as the second aspect includes a base plate 20, a light source 30, a shade 70, a projection lens 60, and an electromagnet 80.
  • the light source 30 is disposed on one side with respect to the base plate 20.
  • the shade 70 is supported by the base plate 20 so as to be movable in a predetermined direction, and blocks a part of the light emitted from the light source 30.
  • the projection lens 60 is disposed on the opposite side of the light source 30 from the base plate 20.
  • the shade 70 is moved using the magnetic force of the electromagnet 80, and the centers 81ac and 81bc at both ends of the core 81 of the electromagnet 80 are located closer to the light source 30 than the base plate 20.
  • the shade 70 is movable in a predetermined direction as described above, and is moved using the magnetic force of the electromagnet 80. Since the shade 70 blocks part of the light emitted from the light source 30, the light shielding range by the shade 70 can be changed by moving the shade 70. For this reason, the light source unit 3 of the present embodiment as the second aspect can change the light distribution pattern of the light emitted from the projection lens 60. Further, as described above, the centers 81ac and 81bc at both ends of the core 81 of the electromagnet 80 are located closer to the light source 30 than the surface of the base plate 20 on the projection lens 60 side.
  • the projection lens 60 side of the electromagnet 80 is closer to the projection lens 60.
  • the amount of protrusion of the portion protruding to can be reduced.
  • the projection lens 60 can be brought close to the base plate 20 and can be miniaturized. Further, by bringing the projection lens 60 closer to the base plate 20, the rear focal point of the projection lens 60 approaches the light source 30.
  • the focal length of the projection lens 60 needs to be shortened so that the position of the rear focal point of the projection lens 60 relative to the light source 30 does not approach the light source 30.
  • the focal length of the projection lens 60 is shortened, the radius of curvature of at least one of the entrance surface 62 and the exit surface 63 of the projection lens 60 becomes small, so the outer diameter of the projection lens 60 can be made small. Therefore, the light source unit 3 can be reduced in size.
  • the electromagnet 80 is arranged so that the extending direction of the core 81 is parallel to the surface direction of the base plate 20. Electromagnets generally tend to be elongated in the direction in which the core extends.
  • the electromagnet 80 is disposed so that the extending direction of the core 81 is parallel to the surface direction of the base plate 20. For this reason, compared with the case where the electromagnet 80 is arranged so that the extending direction of the core 81 is inclined with respect to the surface direction of the base plate 20, the protrusion of the portion of the electromagnet 80 that protrudes closer to the projection lens 60 than the base plate 20. The amount can be reduced. For this reason, the projection lens 60 can be brought closer to the base plate 20.
  • the light source unit 3 includes a torsion spring 26 that is an urging member.
  • the shade 70 is rotatable and is rotated in a predetermined direction using the magnetic force of the electromagnet 80.
  • the torsion spring 26 urges the shade 70 in the direction opposite to the direction in which the torsion spring 26 is rotated using the magnetic force of the electromagnet 80.
  • the center of gravity of the shade 70 is located on the rotation axis of the shade 70.
  • the force applied to the shade 70 when the shade 70 is rotated using the magnetic force of the electromagnet 80 resists the biasing force of the torsion spring 26 so that the shade 70 is predetermined.
  • the shade 70 can be held in a predetermined rotational position. Further, by making the electromagnet 80 in a non-energized state, the shade 70 can be rotated in the direction opposite to the predetermined direction by the urging force of the torsion spring 26, and the shade 70 can be held at another predetermined rotation position. As described above, in the light source unit 3 of the present embodiment as the second mode, the light distribution can be switched by switching between energization and non-energization of the electromagnet 80.
  • the center of gravity of the shade 70 is located on the rotation axis of the shade 70, compared to the case where the center of gravity of the shade 70 is not located on the rotation axis of the shade 70, The shade 70 can be rotated with a small biasing force, and the shade 70 can be rotated with a small magnetic force. Therefore, the electromagnet 80 can be reduced in size.
  • the shade 70 has a magnetic part 75 made of a magnetic material.
  • the magnetic force of the electromagnet 80 is applied to the magnetic part 75 made of a magnetic material in the shade 70 by energizing the electromagnet 80 to move the shade 70 in a predetermined direction. Can be moved. For this reason, the shade 70 can be moved without using a link member that transmits the force generated by the magnetic force of the electromagnet 80 to the shade 70. For this reason, it can suppress that a number of parts increases compared with the light source unit of the above-mentioned patent documents 2.
  • the shade 70 has a reflecting portion 72 that moves in a predetermined direction between the base plate 20 and the projection lens 60.
  • the reflection unit 72 reflects a part of the light emitted from the light source 30 that is different from the light directed to the incident surface 62 of the projection lens 60 and causes the light to enter the incident surface 62 of the projection lens 60.
  • the reflecting unit 72 is a part of light that is different from the light emitted from the light source 30 toward the incident surface 62 of the projection lens 60. Is reflected and made incident on the incident surface 62 of the projection lens 60.
  • the reflecting portion 72 is a part of the shade 70 and moves in a predetermined direction.
  • the light source unit 3 of the present embodiment as the second aspect can improve the degree of freedom of the light distribution pattern that can be formed, as compared with the case where the shade 70 does not have the reflecting portion 72. Further, as described above, since the centers 81ac and 81bc at both ends of the core 81 of the electromagnet 80 are located closer to the light source 30 than the base plate 20, the entire core 81 of the electromagnet 80 is located between the projection lens 60 and the base plate 20.
  • the light source unit 3 of the present embodiment as the second aspect can enlarge the reflecting portion 72 and can improve the utilization efficiency of the light emitted from the light source 30.
  • the shade 70 has the magnetic part 75 made of a magnetic material.
  • the electromagnet 80 includes a yoke 83 that is a positioning member made of a magnetic material.
  • the magnetic force of the electromagnet tends to become weaker when it is separated from a member including the magnetic body of the electromagnet, such as a core or a yoke.
  • the magnetic part 75 of the shade 70 is brought into contact with the yoke 83 including the magnetic body in the electromagnet 80 by the magnetic force of the electromagnet 80.
  • the magnetic part 75 made of a magnetic material of the shade 70 is brought into contact with the yoke 83 made of a magnetic material. That is, the magnetic body in the magnetic part 75 is brought into contact with the magnetic body in the yoke 83.
  • the magnetic flux is diffused between these members.
  • a member that generates magnetic force and a member made of a magnetic material are in direct contact with each other, diffusion of magnetic flux between these members is suppressed, and a stronger magnetic force acts on the member made of a magnetic material.
  • the yoke 83 is made of a magnetic material, the magnetic field is concentrated on the yoke 83, and the yoke 83 where such magnetic field concentration is generated is made of the magnetic material.
  • the magnetic part 75 is directly abutted. For this reason, compared with the case where the yoke 83 made of a magnetic material and the magnetic part 75 made of a magnetic material are not in direct contact with each other, a strong magnetic force can be applied to the magnetic portion 75 of the shade 70, thereby making the shade 70 stronger. Can be held and positioned.
  • the magnetic part 75 includes a contact part 77 and a pair of guide parts 78.
  • the contact portion 77 is made of a magnetic material and is in contact with a pair of side wall portions 84 in the yoke 83.
  • the pair of guide portions 78 is made of a magnetic material and protrudes closer to the yoke 83 than the contact portion 77 when the contact portion 77 and the yoke 83 are farthest apart from each other, and is not in contact with the yoke 83. Since the pair of guide portions 78 are not in contact with the yoke 83, the contact portion 77 and the yoke 83 can be brought into contact with each other appropriately.
  • the pair of guide portions 78 protrudes closer to the yoke 83 than the contact portion 77. Therefore, the distal ends of the pair of guide portions 78 made of a magnetic material are magnetic. It is located on the yoke 83 side with respect to the contact portion 77 made of a body. For this reason, in such a state, a stronger magnetic force can act on the pair of guide portions 78 than on the contact portions 77. Therefore, a stronger magnetic force can be applied to the magnetic part 75 in a state where the magnetic part 75 and the yoke 83 are farthest apart compared to the case where the guide part 78 is not provided. Therefore, the electromagnet 80 can be reduced in size.
  • the magnetic part 75 and the yoke 83 have contact surfaces 77s and 84s that contact each other. For this reason, since the magnetic part 75 and the yoke 83 are in surface contact, the shade 70 can be held more stably than in the case of no surface contact.
  • the electromagnet 80 in which the centers 81ac and 81bc at both ends of the core 81 are located closer to the light source 30 than the base plate 20 has been described as an example.
  • the electromagnet 80 is disposed at a position rotated by a predetermined angle around the shaft 25 from the position in the above embodiment, and the center of the end on the end portion 81 a side of the core 81 is closer to the light source 30 side than the base plate 20. It may be located on the opposite side.
  • the centers 81ac and 81bc at both ends of the core 81 are preferably located closer to the light source 30 than the base plate 20, and the core 81 is not disposed closer to the projection lens 60 than the base plate 20. preferable.
  • FIG. 9 is a view showing a modification of the shade in the same manner as FIG.
  • the same referential mark is attached
  • the shade 70 shown in FIG. 9 is different from the shade 70 in the light source unit 3 of the above embodiment in that the magnetic part 75 has an elastic layer made of an elastic body.
  • the magnetic part 75 in the shade 70 of this modification has an elastic body layer 90 made of an elastic body on the electromagnet 80 side of the contact part 77 made of a magnetic body, and the elastic body layer 90 is exposed to the outside.
  • Examples of the elastic body include silicon rubber and a composite material in which a magnetic body is dispersed in a resin.
  • the elastic body layer 90 in the magnetic part 75 comes into contact with the contact surfaces 84 s of the pair of side wall parts 84 in the yoke 83, and the shade 70 is held so as not to rotate about the shaft 25 by the magnetic force of the electromagnet 80. That is, when the shade 70 is positioned by the magnetic force of the electromagnet 80, the elastic body of the magnetic part 75 is brought into contact with the yoke 83 that is a positioning member. For this reason, the sound produced when the magnetic part 75 and the yoke 83 contact
  • the yoke 83 may have an elastic layer made of an elastic body in place of the magnetic portion 75 from the viewpoint of suppressing sound generated when the magnetic portion 75 and the yoke 83 serving as a positioning member come into contact with each other.
  • FIG. 10 is a view showing a modification of the electromagnet in the same manner as FIG.
  • the same referential mark is attached
  • the electromagnet 80 shown in FIG. 10 differs from the electromagnet 80 in the light source unit 3 of the above embodiment in that the pair of side wall portions 84 of the yoke 83 has an elastic layer made of an elastic body.
  • the pair of side wall portions 84 of the yoke 83 in the electromagnet 80 of the present modified example has an elastic body layer 190 made of an elastic body at the end of the shade 70 on the contact portion 77 side, and the elastic body layer 190 is exposed to the outside. Exposed.
  • the elastic body include silicon rubber and a composite material in which a magnetic body is dispersed in a resin.
  • the magnetic part 75 may have an elastic layer made of an elastic body, and the elastic body of the magnetic part 75 may be in contact with the elastic body of the yoke 83.
  • the magnetic part 75 and the yoke 83 as the positioning member have contact surfaces 77 s and 84 s that are in contact with each other, and the magnetic part 75 and the yoke 83 are caused by the magnetic force of the electromagnet 80. There was surface contact. However, there is no particular limitation as long as the magnetic part 75 contacts the yoke 83 that is a positioning member by the magnetic force of the electromagnet 80. However, from the viewpoint of stably holding the shade 70, it is preferable that the magnetic portion 75 and the yoke 83 are in surface contact by the magnetic force of the electromagnet 80.
  • one end surface of the pair of side wall portions 84 of the yoke 83 is the contact surface 84s with which the magnetic portion 75 contacts.
  • the contact surface with which the magnetic part 75 contacts is not particularly limited.
  • FIG. 11 is a perspective view showing another modification of the electromagnet.
  • the electromagnet 80 shown in FIG. 11 differs from the electromagnet 80 in the above embodiment in that the ends of the pair of side walls 84 of the yoke 83 on the magnetic part 75 side are bent.
  • the end portions on the magnetic portion 75 side of the pair of side wall portions 84 in the yoke 83 are bent to the side opposite to the coil 82 side so that the cross-sectional shape is L-shaped.
  • a surface on the side of the magnetic part 75 at the bent end portion is a contact surface 184s, and the contact surface 184s extends so as to cross a part of the magnetic flux line of the magnetic field generated by the coil 82 in a substantially vertical direction.
  • the contact surface 184s is located in a space through which the contact portion 77 of the magnetic portion 75 passes when the shade 70 rotates about the shaft 25, and the electromagnet 80.
  • the contact portion 77 is in contact with the contact surface 184s by the magnetic force of.
  • the shade 70 can be stably rotated by the magnetic force of the electromagnet 80 without increasing the size of the coil 82 of the electromagnet 80.
  • the core 81 and the yoke 83 are only required to concentrate the magnetic field.
  • the yoke 83 may not have the bottom wall portion 85.
  • the magnetic part 75 is in contact with the yoke 83 that is a positioning member by the magnetic force of the electromagnet 80.
  • the positioning member may be a member including a magnetic body and is not limited to the yoke 83.
  • the core 81 of the electromagnet 80 may be used as a positioning member, and the magnetic part 75 may come into contact with the core 81 by the magnetic force of the electromagnet 80.
  • the electromagnet 80 has the center axis CA of the core 81 extending in the vertical direction parallel to the surface direction of the base plate 20 on the light source 30 side of the base plate 20. It was arrange
  • the arrangement of the electromagnet 80 is not particularly limited.
  • the electromagnet 80 may be arranged at a position rotated by a predetermined angle around the shaft 25 from the position in the above embodiment.
  • the reflecting portion 72 is a part of the shade 70, and the reflecting portion 72 moves in a predetermined direction between the base plate 20 and the projection lens 60.
  • a part of the light emitted from the light source 30 by the reflecting unit 72 is different from the light directed to the incident surface 62 of the projection lens 60 and is incident on the incident surface 62 of the projection lens 60.
  • the light source unit includes a reflecting member that moves in a predetermined direction according to the movement of the shade 70 between the base plate 20 and the projection lens 60, and the projection lens 60 out of the light emitted from the light source 30 by the reflecting member.
  • a part of the light different from the light traveling toward the incident surface 62 may be reflected and incident on the incident surface 62 of the projection lens 60.
  • the shade 70 and the reflecting portion 72 may be separated. Even if it is set as such a structure, the freedom degree of the light distribution pattern which can be formed can be improved compared with the case where a reflection member is not provided.
  • the light source unit may not include such a reflecting member, and the shade 70 may not include the reflecting portion 72.
  • the light source unit 3 that can switch between the low beam distribution and the high beam distribution has been described as an example.
  • the light source unit 3 only needs to change the light distribution pattern, and the light distribution pattern is not particularly limited.
  • the light source unit 3 may be a light source unit in a lamp different from the vehicle headlamp.
  • the shade 70 having the reflecting portion 72 and rotatably supported by the base plate 20 has been described as an example.
  • the shade 70 is not particularly limited as long as it has a magnetic part 75 including a magnetic body, blocks a part of light emitted from the light source, and can move in a predetermined direction.
  • the shade may not have the reflecting portion 72 and may be movable along the surface direction of the base plate 20. Even in such a configuration, when the shade moves along the surface direction of the base plate 20, the light shielding range by the shade is changed, and the light distribution pattern can be changed.
  • the shade 70 is supported by the base plate 20 so as to be movable in a predetermined direction, blocks a part of the light emitted from the light source 30, and is moved using the magnetic force of the electromagnet 80. If it does not specifically limit.
  • the shade may be movable along the surface direction of the base plate 20. Even in such a configuration, when the shade moves along the surface direction of the base plate 20, the light shielding range by the shade is changed, and the light distribution pattern can be changed.
  • the electromagnet 80 may be a part of the solenoid actuator, and the force from the solenoid actuator may be transmitted to the shade 70 via a transmission member such as a link member, and the shade 70 may be moved.
  • the shade 70 may not have the magnetic part 75 including a magnetic body.
  • the second opening 22 of the base plate 20 is connected to the first opening 21, and the first opening 21 and the second opening 22 communicate with each other.
  • the first opening 21 and the second opening 22 do not have to communicate with each other.
  • the shade 70 is urged by the urging force of the torsion spring 26 that is an urging member.
  • the biasing member is not particularly limited in the light source unit of the first aspect as long as it biases the shade 70 in a direction in which the magnetic part 75 rotates so as to be separated from the yoke 83 that is the positioning member.
  • the urging member is not particularly limited as long as the urging member urges the shade 70 in the direction opposite to the rotating direction using the magnetic force of the electromagnet 80.
  • the urging member may be a spring.
  • the PES optical system is applied.
  • a parabolic optical system may be applied, and the direct optical that directly enters the light from the light source into the lens without using a reflector.
  • a system may be applied.
  • a light source unit that can suppress unintended changes in the light distribution pattern is provided.
  • a light source unit that can be reduced in size is provided. Provided and available in fields such as lighting.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

The light source unit (3) is provided with: a light source (30); a shade (70) which has a magnetic part (75) including a magnetic body, blocks a portion of light emitted from the light source (30), and can be moved in a predetermined direction; and an electromagnet (80) which has a yoke (83) serving as a positioning member including a magnetic body. The magnetic part (75) of the shade (70) is brought into contact with the yoke (83) of the electromagnet (80) by the magnetic force of the electromagnet (80).

Description

光源ユニットLight source unit
　本発明は、光源ユニットに関し、具体的には、配光を変化し得る光源ユニットに関する。 The present invention relates to a light source unit, and specifically to a light source unit capable of changing light distribution.
　自動車用ヘッドライトとして、出射する光を夜間に前方を照らすロービームと当該ロービームよりも遠方を照らすハイビームとに変化させることができるものが知られている。下記特許文献１には、このような車両用灯具が記載されている。 2. Description of the Related Art A headlight for an automobile is known that can change emitted light into a low beam that illuminates the front at night and a high beam that illuminates far away from the low beam. Patent Document 1 listed below describes such a vehicular lamp.
　下記特許文献１に記載の車両用灯具の光源ユニットは、回動可能に支持されて光源から出射する光の一部を遮るシェードと、コアを有する電磁石とを備えている。この光源ユニットでは、シェードに磁性体から成る磁性部が設けられており、電磁石の磁力がシェードの磁性部に作用することでシェードが回動する。このように、シェードが回動されることで、当該シェードによる遮光範囲が変化し、出射する光をロービームとハイビームとに変化させることができるとされている。また、この光源ユニットでは、シェードの磁性部に作用する電磁石の磁力によって当該シェードを固定ストッパに付勢させてシェードの位置決めがされており、この際、シェードの磁性部と電磁石のコアとは非接触とされている。 The light source unit of the vehicle lamp described in Patent Document 1 below includes a shade that is supported rotatably and blocks a part of light emitted from the light source, and an electromagnet having a core. In this light source unit, the shade is provided with a magnetic portion made of a magnetic material, and the shade is rotated by the magnetic force of the electromagnet acting on the magnetic portion of the shade. As described above, the shade is rotated so that the light shielding range by the shade is changed, and the emitted light can be changed between the low beam and the high beam. Further, in this light source unit, the shade is positioned by biasing the shade against the fixed stopper by the magnetic force of the electromagnet acting on the magnetic portion of the shade. At this time, the magnetic portion of the shade and the core of the electromagnet are not in contact with each other. It is said to be in contact.
　また、下記特許文献２に記載の車両用灯具の光源ユニットは、光源と、ベースプレートに回動可能に支持されるシェードと、投影レンズと、電磁石を有するソレノイドアクチュエータとを備えている。この光源ユニットでは、光源から出射する光の一部はシェードで遮られ、この光の他の一部は投影レンズに入射して当該投影レンズから出射される。また、ソレノイドアクチュエータからの力がベースプレートに回動可能に支持されるリンク部材を介してシェードに伝達され、当該シェードが回動される。シェードが回動されることで、当該シェードによる遮光範囲が変化し、投影レンズから出射する光をロービームとハイビームとに変化させることができるとされている。また、この光源ユニットでは、リンク部材及びソレノイドアクチュエータにおける電磁石のコア全体は、投影レンズとベースプレートとの間に位置している。 Also, the light source unit of the vehicle lamp described in Patent Document 2 below includes a light source, a shade that is rotatably supported by a base plate, a projection lens, and a solenoid actuator having an electromagnet. In this light source unit, a part of the light emitted from the light source is blocked by the shade, and the other part of the light enters the projection lens and is emitted from the projection lens. Further, the force from the solenoid actuator is transmitted to the shade through a link member that is rotatably supported by the base plate, and the shade is rotated. By rotating the shade, the light shielding range by the shade is changed, and the light emitted from the projection lens can be changed into a low beam and a high beam. In this light source unit, the entire core of the electromagnet in the link member and the solenoid actuator is located between the projection lens and the base plate.
特開２０１０－１４６９８５号公報JP 2010-146985 A 特開２０１８－４９７３０号公報JP 2018-49730 A
　本発明の第１の態様による光源ユニットは、光源と、磁性体を含む磁性部を有し前記光源から出射する光の一部を遮るとともに所定の方向に移動可能とされるシェードと、磁性体を含む位置決め部材を有する電磁石と、を備え、前記電磁石の磁力によって前記シェードの前記磁性部が前記電磁石の前記位置決め部材に当接されることを特徴とする。 A light source unit according to a first aspect of the present invention includes a light source, a shade that includes a magnetic portion including a magnetic body, blocks a part of light emitted from the light source, and is movable in a predetermined direction, and a magnetic body And an electromagnet having a positioning member including: the magnetic part of the shade is brought into contact with the positioning member of the electromagnet by the magnetic force of the electromagnet.
　このような光源ユニットでは、上記のように、所定の方向に移動可能とされるシェードは磁性体を含む磁性部を有するため、電磁石を通電状態にすることでシェードの磁性部に電磁石の磁力を作用させてシェードを所定の方向に移動させ得る。このシェードは、光源から出射する光の一部を遮るため、シェードが移動されることによってシェードによる遮光範囲が変化し得る。このため、上記光源ユニットは、配光パターンを変化させ得る。ところで、電磁石の磁力は電磁石の磁性体を含む部材、例えばコアやヨーク等から離れると弱くなる傾向にある。上記光源ユニットでは、電磁石の磁力によってシェードの磁性部が電磁石における磁性体を含む位置決め部材に当接される。このため、上記特許文献１に記載の光源ユニットのようにシェードの磁性部が電磁石における磁性体を含む部材に当接しない場合と比べて、シェードの磁性部には強い磁力が作用し、シェードをより強固に保持して位置決めできる。このため、光源ユニットが振動する場合であっても、電磁石に対するシェードの位置がずれることを抑制でき、意図しない配光パターンの変化を抑制し得る。なお、位置決め部材として、例えば電磁石のコアやヨーク等が挙げられる。 In such a light source unit, as described above, the shade that can be moved in a predetermined direction has a magnetic part including a magnetic body. Therefore, when the electromagnet is energized, the magnetic force of the electromagnet is applied to the magnetic part of the shade. The shade can be moved in a predetermined direction by acting. Since this shade blocks a part of the light emitted from the light source, the light shielding range by the shade can be changed by moving the shade. For this reason, the light source unit can change the light distribution pattern. By the way, the magnetic force of the electromagnet tends to become weaker when it is separated from a member including the magnetic body of the electromagnet, such as a core or a yoke. In the light source unit, the magnetic part of the shade is brought into contact with the positioning member including the magnetic body in the electromagnet by the magnetic force of the electromagnet. For this reason, compared with the case where the magnetic part of the shade does not contact the member including the magnetic body in the electromagnet as in the light source unit described in Patent Document 1, a strong magnetic force acts on the magnetic part of the shade, and the shade is It is possible to position it while holding it more firmly. For this reason, even if it is a case where a light source unit vibrates, it can suppress that the position of the shade with respect to an electromagnet shifts, and can suppress the change of the light distribution pattern which is not intended. Examples of the positioning member include an electromagnet core and a yoke.
　前記位置決め部材は弾性体を有し、前記磁性部は前記弾性体に当接されることとしても良い。 The positioning member may have an elastic body, and the magnetic part may be in contact with the elastic body.
　或いは、前記磁性部は弾性体を有し、前記弾性体が前記位置決め部材に当接されることとしても良い。 Alternatively, the magnetic part may have an elastic body, and the elastic body may be in contact with the positioning member.
　このような構成にすることで、磁性部と位置決め部材とが当接する際に生じる音を抑制することができる。 By adopting such a configuration, it is possible to suppress sound generated when the magnetic portion and the positioning member come into contact with each other.
　或いは、前記磁性部における前記磁性体が前記位置決め部材における前記磁性体に当接されることとしても良い。 Alternatively, the magnetic body in the magnetic part may be in contact with the magnetic body in the positioning member.
　ここで、磁力を生じる部材と磁性体から成る部材とが離間していたり、これらの部材間に非磁性体が介在していたりする場合、これらの部材間において磁束が拡散してしまう。しかし、磁力を生じる部材と磁性体から成る部材とが直接当接している場合、こられの部材間で磁束が拡散することが抑制され、磁性体から成る部材にはより強い磁力が作用する。上記光源ユニットでは、位置決め部材は磁性体を含むためこの位置決め部材における磁性体には磁場が集中しており、このような磁場集中が生じている位置決め部材における磁性体に磁性部における磁性体が直接当接する。このため、位置決め部材における磁性体と磁性部における磁性体とが直接当接しない場合と比べて、シェードの磁性部により強い磁力を作用させることができ、シェードをより強固に保持して位置決めできる。 Here, when a member that generates magnetic force and a member made of a magnetic material are separated from each other, or a non-magnetic material is interposed between these members, the magnetic flux is diffused between these members. However, when a member that generates magnetic force and a member made of a magnetic material are in direct contact with each other, diffusion of magnetic flux between these members is suppressed, and a stronger magnetic force acts on the member made of a magnetic material. In the light source unit, since the positioning member includes a magnetic body, a magnetic field is concentrated on the magnetic body in the positioning member, and the magnetic body in the magnetic portion is directly applied to the magnetic body in the positioning member where such magnetic field concentration occurs. Abut. For this reason, compared with the case where the magnetic body in a positioning member and the magnetic body in a magnetic part do not contact | abut directly, a strong magnetic force can be made to act on the magnetic part of a shade, and it can position and hold | maintain a shade more firmly.
　前記磁性部は、当該磁性部における前記磁性体を含み前記位置決め部材に当接される当接部と、当該磁性部における前記磁性体を含み前記当接部と前記位置決め部材とが最も離間した状態において前記当接部よりも前記位置決め部材側に突出する誘導部とを有し、前記誘導部は、前記位置決め部材に非接触とされることが好ましい。 The magnetic part includes a contact part that includes the magnetic body in the magnetic part and is in contact with the positioning member, and a state in which the contact part including the magnetic body in the magnetic part and the positioning member are most separated from each other. It is preferable that the guide portion protrudes toward the positioning member with respect to the contact portion, and the guide portion is not in contact with the positioning member.
　このような光源ユニットでは、上記のように、誘導部は位置決め部材に非接触とされるため、当接部と位置決め部とを適切に当接させることができる。また、磁性部と位置決め部材とが最も離間した状態において誘導部は当接部よりも位置決め部材側に突出するため、磁性体を含む誘導部の先端部は磁性体を含む当接部よりも位置決め部材側に位置している。このため、このような状態では当接部よりも誘導部により強い磁力が作用し得る。このため、このような誘導部を有さない場合と比べて、磁性部と位置決め部材とが最も離間した状態においてより強い磁力を磁性部に作用させ得る。従って、電磁石を小型化し得る。 In such a light source unit, as described above, since the guide portion is not in contact with the positioning member, the contact portion and the positioning portion can be appropriately brought into contact with each other. In addition, since the guiding portion protrudes closer to the positioning member than the contact portion when the magnetic portion and the positioning member are farthest apart, the leading end portion of the guiding portion including the magnetic body is positioned more than the contact portion including the magnetic body. Located on the member side. For this reason, in such a state, a stronger magnetic force can act on the guide portion than on the contact portion. For this reason, compared with the case where it does not have such a guidance part, stronger magnetic force can be made to act on a magnetic part in the state where a magnetic part and a positioning member were most separated. Therefore, the electromagnet can be reduced in size.
　上記光源ユニットは、付勢部材を更に備え、前記シェードは、回動可能とされ、前記付勢部材は、前記磁性部が前記位置決め部材から離間するように回動する方向に向けて前記シェードを付勢し、前記シェードの重心は、当該シェードの回動軸上に位置することとしても良い。 The light source unit further includes an urging member, and the shade is rotatable, and the urging member urges the shade in a direction of rotation so that the magnetic portion is separated from the positioning member. The center of gravity of the shade may be positioned on the rotation axis of the shade.
　このような光源ユニットでは、電磁石の磁力が付勢部材の付勢力に抗することでシェードが回動され、磁性部が位置決め部材に当接される。また、電磁石を非通電状態にすることで、付勢部材の付勢力によって磁性部が位置決め部材から離間するようにシェードが回動され、シェードを所定の回動位置に保持し得る。このように、光源ユニットでは、電磁石の通電と非通電とを切り替えることによって、配光を切り替えることができる。また、上記のように、シェードの重心は当該シェードの回動軸上に位置しているため、シェードの重心が当該シェードの回動軸上に位置していない場合と比べて、小さな付勢力でシェードを回動し得るとともに、小さな磁力でシェードを回動し得る。従って、電磁石を小型化し得る。 In such a light source unit, the shade is rotated by the magnetic force of the electromagnet resisting the urging force of the urging member, and the magnetic portion is brought into contact with the positioning member. Further, by making the electromagnet in a non-energized state, the shade can be rotated so that the magnetic portion is separated from the positioning member by the urging force of the urging member, and the shade can be held at a predetermined rotation position. Thus, in the light source unit, the light distribution can be switched by switching between energization and non-energization of the electromagnet. Further, as described above, since the center of gravity of the shade is located on the rotation axis of the shade, the centroid of the shade is smaller than the case where the center of gravity of the shade is not located on the rotation axis of the shade. The shade can be rotated and the shade can be rotated with a small magnetic force. Therefore, the electromagnet can be reduced in size.
　前記磁性部と前記位置決め部材とは、互いに当接する当接面をそれぞれ有することとしても良い。 The magnetic part and the positioning member may have contact surfaces that contact each other.
　このような構成にすることで、磁性部と位置決め部材とが面接触するため、面接触しない場合と比べて、シェードをより安定して保持できる。 With such a configuration, since the magnetic part and the positioning member are in surface contact, the shade can be held more stably than in the case of no surface contact.
　磁性部と位置決め部材とがそれぞれ当接面を有する場合、前記位置決め部材は、前記電磁石のコイルの外側で当該コイルの延在方向に沿って延在し、前記位置決め部材における前記磁性部側の端部は、断面形状がＬ字形状となるように前記コイル側と反対側に折り曲げられ、前記端部における前記磁性部側の面が前記当接面とされても良い。 When the magnetic part and the positioning member each have a contact surface, the positioning member extends along the extending direction of the coil outside the coil of the electromagnet, and the end of the positioning member on the magnetic part side The part may be bent to the opposite side to the coil side so that the cross-sectional shape is L-shaped, and the surface on the magnetic part side at the end part may be the contact surface.
　このような構成にすることで、位置決め部材の端部が折り曲げられずに当該位置決め部材における磁性部側の端面が当接面とされる場合と比べて、当接面の面積を大きくし得るため、シェードの磁性部を当接面が位置する側に引き付ける磁力を増加させ得る。このため、電磁石のコイルを大型化しなくてもシェードを電磁石の磁力によって安定して移動させ得る。 By adopting such a configuration, it is possible to increase the area of the contact surface compared to the case where the end surface of the positioning member is not bent and the end surface on the magnetic part side of the positioning member is the contact surface. The magnetic force that attracts the magnetic part of the shade to the side where the contact surface is located can be increased. Therefore, the shade can be stably moved by the magnetic force of the electromagnet without increasing the size of the electromagnet coil.
　本発明の第２の態様による光源ユニットは、ベースプレートと、前記ベースプレートを基準とした一方側に配置される光源と、前記ベースプレートに所定の方向に移動可能に支持され前記光源から出射する光の一部を遮るシェードと、前記ベースプレートよりも前記光源側と反対側に配置される投影レンズと、電磁石と、を備え、前記シェードは、前記電磁石の磁力を用いて移動され、少なくとも前記電磁石のコアの一端の中心は、前記ベースプレートよりも前記光源側に位置することを特徴とする。 A light source unit according to a second aspect of the present invention includes a base plate, a light source disposed on one side with respect to the base plate, and one of light emitted from the light source supported by the base plate so as to be movable in a predetermined direction. A shade that blocks the light source, a projection lens that is disposed on the opposite side of the light source from the base plate, and an electromagnet, and the shade is moved using the magnetic force of the electromagnet, and at least the core of the electromagnet The center of one end is located on the light source side with respect to the base plate.
　このような光源ユニットでは、上記のように、シェードは所定の方向に移動可能であり、電磁石の磁力を用いて移動される。このシェードは光源から出射する光の一部を遮るため、シェードが移動されることによってシェードによる遮光範囲が変化し得る。このため、上記光源ユニットは、投影レンズから出射する光の配光パターンを変化させ得る。また、上記のように、電磁石のコアの一端の中心は、ベースプレートにおける投影レンズ側の面よりも前記光源側に位置する。このため、上記特許文献２に記載の光源ユニットのように電磁石のコア全体が投影レンズとベースプレートとの間に位置する場合と比べて、電磁石におけるベースプレートよりも投影レンズ側に突出する部分の突出量を小さくし得る。このため、投影レンズをベースプレートに近づけることができ、小型化し得る。また、投影レンズをベースプレートに近づけることで、投影レンズにおける光源側の焦点は光源に近づく。このように投影レンズをベースプレートに近づけた際に光源に対する投影レンズにおける焦点の位置が光源に近づかないようにするためには、投影レンズの焦点距離を短くする必要がある。投影レンズの焦点距離を短くする場合、投影レンズの入射面及び出射面の少なくとも一方の曲率半径が小さくなるため、投影レンズの外径を小さくし得る。従って、光源ユニットを小型化し得る。 In such a light source unit, as described above, the shade is movable in a predetermined direction and is moved using the magnetic force of the electromagnet. Since this shade blocks a part of the light emitted from the light source, the shading range by the shade can be changed by moving the shade. For this reason, the light source unit can change the light distribution pattern of the light emitted from the projection lens. Further, as described above, the center of one end of the core of the electromagnet is located on the light source side with respect to the projection lens side surface of the base plate. For this reason, compared with the case where the whole core of an electromagnet is located between a projection lens and a base plate like the light source unit of the said patent document 2, the protrusion amount of the part which protrudes in the projection lens side rather than the base plate in an electromagnet Can be made smaller. For this reason, the projection lens can be brought close to the base plate and can be miniaturized. Further, by bringing the projection lens close to the base plate, the light source side focal point of the projection lens approaches the light source. In this way, when the projection lens is brought close to the base plate, it is necessary to shorten the focal length of the projection lens so that the focal position of the projection lens relative to the light source does not approach the light source. When the focal length of the projection lens is shortened, the radius of curvature of at least one of the entrance surface and the exit surface of the projection lens becomes small, so that the outer diameter of the projection lens can be made small. Therefore, the light source unit can be downsized.
　また、第２の態様の光源ユニットでは、前記電磁石は、前記コアの延在方向が前記ベースプレートの面方向と平行となるように配置されることが好ましい。 In the light source unit of the second aspect, it is preferable that the electromagnet is arranged so that the extending direction of the core is parallel to the surface direction of the base plate.
　電磁石は、一般的にコアの延在方向に長尺となる傾向がある。上記光源ユニットでは、上記のように、電磁石はコアの延在方向がベースプレートの面方向と平行となるように配置されている。このため、コアの延在方向がベースプレートの面方向に対して傾くように電磁石が配置されている場合と比べて、電磁石におけるベースプレートよりも投影レンズ側に突出する部分の突出量を小さくし得る。このため、投影レンズをベースプレートにより近づけることができる。 Electromagnets generally tend to be long in the core extending direction. In the light source unit, as described above, the electromagnet is disposed such that the extending direction of the core is parallel to the surface direction of the base plate. For this reason, compared with the case where the electromagnet is arrange | positioned so that the extending direction of a core may incline with respect to the surface direction of a baseplate, the protrusion amount of the part which protrudes in the projection lens side rather than the baseplate in an electromagnet can be made small. For this reason, the projection lens can be brought closer to the base plate.
　また、第２の態様の光源ユニットでは、上記光源ユニットは、付勢部材を更に備え、前記シェードは、回動可能とされるとともに前記電磁石の磁力を用いて所定の方向に回動され、前記付勢部材は、前記電磁石の磁力を用いて回動される方向と反対方向に向けて前記シェードを付勢し、前記シェードの重心は、当該シェードの回動軸上に位置することとしても良い。 In the light source unit of the second aspect, the light source unit further includes an urging member, and the shade is rotatable and rotated in a predetermined direction using the magnetic force of the electromagnet. The urging member urges the shade in a direction opposite to the direction of rotation using the magnetic force of the electromagnet, and the center of gravity of the shade may be located on the rotation axis of the shade. .
　このような光源ユニットでは、電磁石の磁力を用いてシェードを回動させる際にシェードに加わる力が付勢部材の付勢力に抗することでシェードが所定の方向に回動され、シェードを所定の回動位置に保持し得る。また、電磁石を非通電状態にすることで、付勢部材の付勢力によってシェードが所定の方向と反対方向に回動され、シェードを別の所定の回動位置に保持し得る。このように、上記光源ユニットでは、電磁石の通電と非通電とを切り替えることによって、配光を切り替えることができる。また、上記のように、シェードの重心は当該シェードの回動軸上に位置しているため、シェードの重心が当該シェードの回動軸上に位置していない場合と比べて、小さな付勢力でシェードを回動し得るとともに、小さな磁力でシェードを回動し得る。従って、電磁石を小型化し得る。 In such a light source unit, when the shade is rotated using the magnetic force of the electromagnet, the shade is rotated in a predetermined direction by the force applied to the shade resisting the urging force of the urging member. It can be held in a pivot position. Moreover, by making the electromagnet in a non-energized state, the shade can be rotated in the direction opposite to the predetermined direction by the urging force of the urging member, and the shade can be held at another predetermined rotation position. Thus, in the light source unit, the light distribution can be switched by switching between energization and non-energization of the electromagnet. Further, as described above, since the center of gravity of the shade is located on the rotation axis of the shade, the centroid of the shade is smaller than the case where the center of gravity of the shade is not located on the rotation axis of the shade. The shade can be rotated and the shade can be rotated with a small magnetic force. Therefore, the electromagnet can be reduced in size.
　また、第２の態様の光源ユニットでは、前記シェードは、磁性体を含む磁性部を有することとされても良い。 In the light source unit of the second aspect, the shade may have a magnetic part including a magnetic body.
　このような光源ユニットでは、電磁石を通電状態にすることでシェードにおける磁性体を含む磁性部に電磁石の磁力を作用させてシェードを所定の方向に移動させ得る。このため、電磁石の磁力によって生じる力をシェードに伝達するリンク部材を用いなくてもシェードを移動させ得る。このため、上記特許文献２に記載の光源ユニットと比べて、部品点数が増加することを抑制し得る。 In such a light source unit, the shade can be moved in a predetermined direction by applying the magnetic force of the electromagnet to the magnetic part including the magnetic body in the shade by energizing the electromagnet. For this reason, the shade can be moved without using a link member that transmits the force generated by the magnetic force of the electromagnet to the shade. For this reason, it can suppress that a number of parts increases compared with the light source unit of the above-mentioned patent documents 2.
　また、第２の態様の光源ユニットでは、上記光源ユニットは、前記ベースプレートと前記投影レンズとの間において前記シェードの移動に応じて所定の方向に移動する反射部材を更に備え、前記反射部材は、前記光源から出射する光のうち前記投影レンズの前記ベースプレート側の面に向かう光とは異なる光の一部を反射して前記投影レンズの前記ベースプレート側の面に入射させることとしても良い。 In the light source unit of the second aspect, the light source unit further includes a reflecting member that moves in a predetermined direction according to the movement of the shade between the base plate and the projection lens, and the reflecting member includes: A part of the light emitted from the light source that is different from the light directed toward the base plate side surface of the projection lens may be reflected and incident on the base plate side surface of the projection lens.
　このような光源ユニットでは、上記のように、反射部材は、光源から出射する光のうち投影レンズのベースプレート側の面に向かう光とは異なる光の一部を反射して投影レンズのベースプレート側の面に入射させる。また、反射部材はシェードの移動に応じて所定の方向に移動する。このため、シェードを移動させることによってシェードによる遮光範囲が変化するとともに、反射部材で反射して投影レンズに入射する光の量やこの光が投影レンズに入射する位置を変化させ得る。このため、上記光源ユニットは、反射部材を備えない場合と比べて、形成し得る配光パターンの自由度を向上させることができる。また、上記のように、電磁石のコアの一端の中心は、ベースプレートよりも光源側に位置するため、電磁石のコア全体が投影レンズとベースプレートとの間に位置する場合と比べて、投影レンズと電磁石との間に大きな空間を形成し得る。このため、上記光源ユニットは、反射部材を大きくすることができ、光源から出射する光の利用効率を向上させ得る。 In such a light source unit, as described above, the reflection member reflects a part of the light emitted from the light source, which is different from the light directed to the surface on the base plate side of the projection lens, and is on the base plate side of the projection lens. Incident on the surface. Further, the reflecting member moves in a predetermined direction in accordance with the movement of the shade. For this reason, by moving the shade, the light shielding range by the shade can be changed, and the amount of light reflected by the reflecting member and incident on the projection lens and the position where this light enters the projection lens can be changed. For this reason, the said light source unit can improve the freedom degree of the light distribution pattern which can be formed compared with the case where a reflection member is not provided. In addition, as described above, since the center of one end of the electromagnet core is located on the light source side of the base plate, the projection lens and the electromagnet are compared with the case where the entire electromagnet core is located between the projection lens and the base plate. A large space can be formed between the two. For this reason, the said light source unit can enlarge a reflection member, and can improve the utilization efficiency of the light radiate | emitted from a light source.
本発明の実施形態における車両用灯具を概略的に示す断面図である。It is sectional drawing which shows roughly the vehicle lamp in embodiment of this invention. 図１の光源ユニットを拡大した図である。It is the figure which expanded the light source unit of FIG. 図１に示すベースプレート、シェード、電磁石の斜視図である。It is a perspective view of a base plate, a shade, and an electromagnet shown in FIG. ベースプレート、シェード、電磁石を分解して示す斜視図である。It is a perspective view which decomposes | disassembles and shows a base plate, a shade, and an electromagnet. シェードの本体部の斜視図である。It is a perspective view of the main-body part of a shade. 図２の一部を拡大した図である。It is the figure which expanded a part of FIG. 電磁石が非通電状態とされた状態を示す図である。It is a figure which shows the state by which the electromagnet was made into the non-energized state. 電磁石が通電状態とされた状態を示す図である。It is a figure which shows the state by which the electromagnet was made into the electricity supply state. シェードの変形例を図６と同様に示す図である。It is a figure which shows the modification of a shade similarly to FIG. 電磁石の変形例を図６と同様に示す図である。It is a figure which shows the modification of an electromagnet similarly to FIG. 電磁石の他の変形例を示す斜視図である。It is a perspective view which shows the other modification of an electromagnet.
　以下、本発明に係る光源ユニットを実施するための形態が添付図面とともに例示される。以下に例示する実施形態は、本発明の理解を容易にするためのものであり、本発明を限定して解釈するためのものではない。本発明は、その趣旨を逸脱することなく、以下の実施形態から変更、改良することができる。 Hereinafter, modes for carrying out the light source unit according to the present invention will be exemplified with reference to the accompanying drawings. The embodiments exemplified below are intended to facilitate understanding of the present invention, and are not intended to limit the present invention. The present invention can be modified and improved from the following embodiments without departing from the spirit of the present invention.
　図１は、本実施形態における車両用灯具を概略的に示す断面図であり、車両用灯具の鉛直断面図である。本実施形態では、車両用灯具は前照灯１とされる。前照灯は、一般的に車両の前方の左右方向のそれぞれに備えられるものであり、左右の前照灯は左右方向に概ね対称の構成とされる。従って、本実施形態では、一方の前照灯について説明する。 FIG. 1 is a cross-sectional view schematically showing a vehicular lamp in the present embodiment, and is a vertical cross-sectional view of the vehicular lamp. In the present embodiment, the vehicular lamp is the headlamp 1. The headlamps are generally provided in the left and right directions in front of the vehicle, and the left and right headlamps are generally symmetrical in the left and right directions. Therefore, in this embodiment, one headlamp will be described.
　図１に示すように、本実施形態の前照灯１は、筐体２と、光源ユニット３とを主な構成として備える。 As shown in FIG. 1, the headlamp 1 of this embodiment includes a housing 2 and a light source unit 3 as main components.
　筐体２は、ランプハウジング１１、フロントカバー１２、及びバックカバー１３を主な構成として備える。ランプハウジング１１の前方は開口しており、当該開口を塞ぐように無色で透光性を有するフロントカバー１２がランプハウジング１１に固定されている。ランプハウジング１１の後方には前方よりも小さな開口が形成されており、当該開口を塞ぐようにバックカバー１３がランプハウジング１１に固定されている。このような構成の筐体２には、ランプハウジング１１、フロントカバー１２、及びバックカバー１３によって囲われた内部空間１４が形成されている。この内部空間１４内に光源ユニット３が収容されている。 The housing 2 includes a lamp housing 11, a front cover 12, and a back cover 13 as main components. The front of the lamp housing 11 is open, and a colorless and translucent front cover 12 is fixed to the lamp housing 11 so as to close the opening. An opening smaller than the front is formed in the rear of the lamp housing 11, and the back cover 13 is fixed to the lamp housing 11 so as to close the opening. In the housing 2 having such a configuration, an internal space 14 surrounded by the lamp housing 11, the front cover 12, and the back cover 13 is formed. The light source unit 3 is accommodated in the internal space 14.
　本実施形態の光源ユニット３は、ベースプレート２０、光源３０、発光制御回路３５、ヒートシンク４０、リフレクタ５０、投影レンズ６０、シェード７０、電磁石８０、を主な構成として備える。 The light source unit 3 of this embodiment includes a base plate 20, a light source 30, a light emission control circuit 35, a heat sink 40, a reflector 50, a projection lens 60, a shade 70, and an electromagnet 80 as main components.
　図２は、図１の光源ユニットを拡大した図である。ベースプレート２０は概ね鉛直方向に延在する金属製の板状部材であり、不図示の手段によって筐体２に固定される。このベースプレート２０には、当該ベースプレート２０を貫通する第１開口２１と第２開口２２とが形成されている。第１開口２１は、光源３０から出射する光が通る光路上に位置している。第２開口２２は、第１開口２１よりも下方に位置し、本実施形態では第２開口２２は第１開口２１に接続され、第１開口２１と第２開口２２とが互いに連通している。また、これら開口２１，２２の開口方向は前後方向とされている。 FIG. 2 is an enlarged view of the light source unit of FIG. The base plate 20 is a metal plate-like member extending substantially in the vertical direction, and is fixed to the housing 2 by means (not shown). The base plate 20 is formed with a first opening 21 and a second opening 22 that penetrate the base plate 20. The first opening 21 is located on the optical path through which the light emitted from the light source 30 passes. The second opening 22 is located below the first opening 21. In the present embodiment, the second opening 22 is connected to the first opening 21, and the first opening 21 and the second opening 22 communicate with each other. . The opening direction of these openings 21 and 22 is the front-rear direction.
　光源３０は、光を出射する発光素子とされ、例えば白色の光を出射するＬＥＤとされる。光源３０の発光は発光制御回路３５によって制御される。ヒートシンク４０は、ベースプレート２０の後方側に配置され、不図示の手段によって当該ベースプレート２０に固定される。ヒートシンク４０は、例えば金属材料から成り、概ね水平方向に延在する板状のベース部４１と、ベース部４１に対して概ね垂直で左右方向に延在する板状の後方壁部４２とを有する。後方壁部４２はベース部４１の上方の面側に位置し、後方壁部４２の下端部がベース部４１の後端部に接続され、ベース部４１と後方壁部４２とが一体に形成されている。ベース部４１の下方の面側には複数の放熱フィン４３がベース部４１と一体に形成されている。また、後方壁部４２の後方の面側にも複数の放熱フィン４４が後方壁部４２と一体に形成されている。光源３０は、ベース部４１の上方側の面における後方壁部４２よりも前方側に形成される台座４５の端面に載置される。発光制御回路３５は、放熱フィン４３の下方に配置され、ヒートシンク４０に固定される。 The light source 30 is a light emitting element that emits light, for example, an LED that emits white light. The light emission of the light source 30 is controlled by the light emission control circuit 35. The heat sink 40 is disposed on the rear side of the base plate 20 and is fixed to the base plate 20 by means (not shown). The heat sink 40 is made of, for example, a metal material, and includes a plate-like base portion 41 that extends substantially in the horizontal direction, and a plate-like rear wall portion 42 that extends substantially perpendicular to the base portion 41 and extends in the left-right direction. . The rear wall portion 42 is positioned on the upper surface side of the base portion 41, the lower end portion of the rear wall portion 42 is connected to the rear end portion of the base portion 41, and the base portion 41 and the rear wall portion 42 are integrally formed. ing. A plurality of heat radiation fins 43 are formed integrally with the base portion 41 on the lower surface side of the base portion 41. A plurality of heat radiation fins 44 are also formed integrally with the rear wall 42 on the rear surface side of the rear wall 42. The light source 30 is placed on an end surface of a pedestal 45 formed on the front side of the rear wall 42 on the upper surface of the base portion 41. The light emission control circuit 35 is disposed below the heat radiating fins 43 and is fixed to the heat sink 40.
　リフレクタ５０は、曲面状の板状部材とされ、ヒートシンク４０における後方壁部４２よりも前方側において、上方側から光源３０に被さるようにしてヒートシンク４０のベース部４１に固定されている。本実施形態では、リフレクタ５０は、ロービーム用リフレクタ５１と、ハイビーム用リフレクタ５２と、サブリフレクタ５３とから成る。ハイビーム用リフレクタ５２がロービーム用リフレクタ５１よりもベース部４１側に配置される。ロービーム用リフレクタ５１における光源３０側の面がロービーム用反射面５１Ｒとされ、ハイビーム用リフレクタ５２における光源３０側の面がハイビーム用反射面５２Ｒとされる。これらロービーム用反射面５１Ｒ及びハイビーム用反射面５２Ｒは、それぞれ回転楕円曲面を基調としている。ロービーム用反射面５１Ｒにおける楕円曲面の第１焦点の位置は、ハイビーム用反射面５２Ｒにおける楕円曲面の第１焦点の位置と僅かに異なる位置とされている。ロービーム用反射面５１Ｒの楕円曲面の第１焦点の位置及びハイビーム用反射面５２Ｒの楕円曲面の第１焦点の位置の近傍に光源３０が位置している。この光源３０から出射する光の一部は、ロービーム用リフレクタ５１のロービーム用反射面５１Ｒ、及びハイビーム用リフレクタ５２のハイビーム用反射面５２Ｒによって投影レンズ６０側へ反射される。サブリフレクタ５３は、ロービーム用リフレクタ５１の前方側の上端部から前方に延在しており、ロービーム用リフレクタ５１よりもベース部４１側と反対側に位置している。サブリフレクタ５３における光源３０側の面がサブ反射面５３Ｒとされ、光源３０から出射する光の一部は、サブリフレクタ５３のサブ反射面５３Ｒによって投影レンズ６０側へ反射されるものの、この反射した光は直接投影レンズ６０には入射しない。 The reflector 50 is a curved plate-like member, and is fixed to the base portion 41 of the heat sink 40 so as to cover the light source 30 from the upper side in front of the rear wall portion 42 in the heat sink 40. In the present embodiment, the reflector 50 includes a low beam reflector 51, a high beam reflector 52, and a sub reflector 53. The high beam reflector 52 is disposed closer to the base 41 than the low beam reflector 51. The surface on the light source 30 side in the low beam reflector 51 is a low beam reflecting surface 51R, and the surface on the light source 30 side in the high beam reflector 52 is a high beam reflecting surface 52R. Each of the low beam reflection surface 51R and the high beam reflection surface 52R is based on a spheroidal curved surface. The position of the first focal point of the elliptic curved surface on the low beam reflecting surface 51R is slightly different from the position of the first focal point of the elliptic curved surface on the high beam reflecting surface 52R. The light source 30 is located in the vicinity of the position of the first focal point of the elliptical curved surface of the low beam reflecting surface 51R and the position of the first focal point of the elliptical curved surface of the high beam reflective surface 52R. A part of the light emitted from the light source 30 is reflected toward the projection lens 60 by the low beam reflecting surface 51R of the low beam reflector 51 and the high beam reflecting surface 52R of the high beam reflector 52. The sub-reflector 53 extends forward from the upper end portion on the front side of the low beam reflector 51, and is located on the opposite side of the base portion 41 side from the low beam reflector 51. The surface on the light source 30 side of the sub reflector 53 is a sub reflection surface 53R, and a part of the light emitted from the light source 30 is reflected to the projection lens 60 side by the sub reflection surface 53R of the sub reflector 53. Light does not enter the projection lens 60 directly.
　投影レンズ６０は、非球面両凸レンズとされ、ベースプレート２０の前方側に配置され、レンズホルダ６１を介してベースプレート２０に固定される。この投影レンズ６０では、ベースプレート２０側の面がベースプレート２０側に膨らむ凸面状の入射面６２とされ、ベースプレート２０側と反対側の面がベースプレート２０側と反対側に膨らむ凸面状の出射面６３とされる。そして、本実施形態では、投影レンズ６０の光源３０側の焦点である後方焦点がロービーム用反射面５１Ｒの楕円曲面の第１焦点の位置及びハイビーム用反射面５２Ｒの楕円曲面の第１焦点の位置の近傍に位置するように投影レンズ６０が配置されている。つまり、本実施形態の光源ユニット３では、ＰＥＳ（Projector Ellipsoid System）光学系が採用されている。なお、投影レンズ６０は非球面両凸レンズに限定されるものではなく、例えば入射面６２が平坦な面とされた非球面平凸レンズとされても良い。 The projection lens 60 is an aspherical biconvex lens, is disposed on the front side of the base plate 20, and is fixed to the base plate 20 via a lens holder 61. In this projection lens 60, the surface on the base plate 20 side is a convex incident surface 62 that swells toward the base plate 20, and the surface opposite to the base plate 20 side is a convex exit surface 63 that swells on the opposite side to the base plate 20 side. Is done. In this embodiment, the rear focal point, which is the focal point of the projection lens 60 on the light source 30 side, is the position of the first focal point of the elliptical curved surface of the low beam reflecting surface 51R and the position of the first focal point of the elliptical curved surface of the high beam reflecting surface 52R. The projection lens 60 is disposed so as to be located in the vicinity of the. That is, in the light source unit 3 of the present embodiment, a PES (Projector Ellipsoid System) optical system is employed. The projection lens 60 is not limited to an aspherical biconvex lens, and may be an aspherical planoconvex lens in which the incident surface 62 is a flat surface, for example.
　図３は、図１に示すベースプレート、シェード、電磁石の斜視図であり、図４は、ベースプレート、シェード、電磁石を分解して示す斜視図である。なお、図１から図３では、電磁石８０が非通電状態とされた状態が示されており、図４では、ベースプレート２０における第１開口２１と第２開口２２との境界が破線で示されている。図３、図４に示すように、シェード７０は、本体部７１と反射部７２とを有する。本体部７１は、遮光部７３、一対の接続部７４、磁性体から成る磁性部７５、係止部７６を有している。本実施形態では、遮光部７３、一対の接続部７４、磁性部７５、及び係止部７６は、磁性体から成る板状部材を曲げ加工することで一体に成形されている。なお、磁性体としては、例えば、鉄、コバルト、ニッケル等が挙げられる。 FIG. 3 is a perspective view of the base plate, shade, and electromagnet shown in FIG. 1, and FIG. 4 is an exploded perspective view of the base plate, shade, and electromagnet. 1 to 3 show a state in which the electromagnet 80 is in a non-energized state. In FIG. 4, the boundary between the first opening 21 and the second opening 22 in the base plate 20 is indicated by a broken line. Yes. As shown in FIGS. 3 and 4, the shade 70 has a main body 71 and a reflecting portion 72. The main body 71 has a light shielding part 73, a pair of connection parts 74, a magnetic part 75 made of a magnetic material, and a locking part 76. In the present embodiment, the light shielding portion 73, the pair of connection portions 74, the magnetic portion 75, and the locking portion 76 are integrally formed by bending a plate-like member made of a magnetic material. In addition, as a magnetic body, iron, cobalt, nickel etc. are mentioned, for example.
　図５は、シェードの本体部の斜視図である。図５に示すように、遮光部７３は、左右方向に延在しており、上端部には当該遮光部７３の延在方向に沿って前方へ突出する突起部７３ａが形成されている。一対の接続部７４は概ね左右対称の構成とされ、一方の接続部７４は遮光部７３の左右方向における一方の端部から前方に向かって延在し、他方の接続部７４は遮光部７３の左右方向における他方の端部から前方に向かって延在している。一対の接続部７４には、左右方向に貫通する貫通孔７４ｈがそれぞれ形成され、この貫通孔７４ｈは互いに対向している。また、一対の接続部７４における貫通孔７４ｈよりも前方には、他方の接続部７４側に向かって延在する固定部７４ａがそれぞれ形成されている。また、一対の接続部７４における貫通孔７４ｈよりも後方かつ上方には、他方の接続部７４側と反対側に突出する規制突起部７４ｂがそれぞれ形成されている。 FIG. 5 is a perspective view of the main body of the shade. As shown in FIG. 5, the light shielding portion 73 extends in the left-right direction, and a protrusion 73 a that protrudes forward along the extending direction of the light shielding portion 73 is formed at the upper end portion. The pair of connection portions 74 are generally symmetrically configured, one connection portion 74 extends forward from one end portion in the left-right direction of the light shielding portion 73, and the other connection portion 74 is the light shielding portion 73. It extends toward the front from the other end in the left-right direction. The pair of connecting portions 74 are formed with through holes 74h penetrating in the left-right direction, and the through holes 74h face each other. In addition, a fixing portion 74 a extending toward the other connecting portion 74 is formed in front of the through hole 74 h in the pair of connecting portions 74. In addition, a regulating projection 74b that protrudes to the opposite side of the other connecting portion 74 is formed behind and above the through hole 74h in the pair of connecting portions 74, respectively.
　磁性部７５は、当接部７７と一対の誘導部７８とを有する。当接部７７は、遮光部７３における下端部から前方かつ下方に向かって延在している。この当接部７７の下方側の面は、当該当接部７７の延在方向に沿った平坦な当接面７７ｓとされる。一対の誘導部７８のうち一方の誘導部７８は、当接部７７の左右方向における一方の端部から下方側へ突出している。他方の誘導部７８は、当接部７７の左右方向における他方の端部から下方側へ突出している。なお、磁性部７５は誘導部７８を有していなくても良い。 The magnetic part 75 has a contact part 77 and a pair of guide parts 78. The contact portion 77 extends forward and downward from the lower end portion of the light shielding portion 73. A lower surface of the contact portion 77 is a flat contact surface 77 s along the extending direction of the contact portion 77. One guide portion 78 of the pair of guide portions 78 protrudes downward from one end portion of the contact portion 77 in the left-right direction. The other guide portion 78 protrudes downward from the other end portion of the contact portion 77 in the left-right direction. The magnetic part 75 may not have the guiding part 78.
　係止部７６は、磁性部７５と同様に、遮光部７３における下端部から前方に向かって延在している。このような磁性部７５及び係止部７６は、接続部７４の貫通孔７４ｈにおける貫通方向から見る場合、当該貫通孔７４ｈと重なっていない。また、磁性部７５の前方側の端部は、接続部７４の固定部７４ａよりも後方側で貫通孔７４ｈよりも下方に位置し、係止部７６の前方側の端部は、接続部７４の貫通孔７４ｈよりも後方側に位置している。 Similarly to the magnetic part 75, the locking part 76 extends forward from the lower end of the light shielding part 73. Such a magnetic part 75 and the locking part 76 do not overlap with the through hole 74h when viewed from the through direction in the through hole 74h of the connection part 74. The front end of the magnetic part 75 is located behind the fixing part 74 a of the connection part 74 and below the through hole 74 h, and the front end of the locking part 76 is connected to the connection part 74. It is located behind the through hole 74h.
　反射部７２は左右方向に延在する板状部材とされ、延在方向における一方の端部は一方の接続部７４の固定部７４ａに固定され、他方の端部は他方の接続部７４の固定部７４ａに固定される。このため、シェード７０における遮光部７３、一対の接続部７４、及び反射部７２からなる部位が枠状に形成され、シェード７０の強度が向上されている。反射部７２における本体部７１側と反対側の面が光を反射する反射面７２Ｒとされる。反射面７２Ｒは、前方に向かって下方に傾斜し本体部７１側に向かって凸状に湾曲する曲面とされている。このため、反射部７２は反射面７２Ｒを有する反射部材であるとともにシェード７０の一部とされていると理解できる。 The reflecting portion 72 is a plate-like member extending in the left-right direction, one end in the extending direction is fixed to the fixing portion 74a of one connecting portion 74, and the other end is fixed to the other connecting portion 74. It is fixed to the part 74a. For this reason, the part which consists of the light-shielding part 73 in the shade 70, a pair of connection part 74, and the reflection part 72 is formed in frame shape, and the intensity | strength of the shade 70 is improved. The surface of the reflecting portion 72 opposite to the main body portion 71 is a reflecting surface 72R that reflects light. The reflecting surface 72R is a curved surface that is inclined downward toward the front and curved convexly toward the main body 71 side. For this reason, it can be understood that the reflecting portion 72 is a reflecting member having the reflecting surface 72 </ b> R and is a part of the shade 70.
　このようなシェード７０は、図３、図４に示すように、一対の接続部７４の貫通孔７４ｈに円柱状のシャフト２５が挿入されることによって、当該シャフト２５を軸として回動可能とされる。本実施形態では、シェード７０の重心がシャフト２５の中心軸上に位置している。また、磁性部７５における当接部７７の当接面７７ｓはシャフト２５の延在方向と平行とされている。このようにシェード７０における貫通孔７４ｈに挿入されたシャフト２５がベースプレート２０に固定されることによって、シェード７０はベースプレート２０に回動可能に支持される。より具体的には、図３、図４に示すように、ベースプレート２０には、投影レンズ６０側である前方に突出する一対の軸受部２３が形成されている。一対の軸受部２３は水平方向に並列されており、一方の軸受部２３はベースプレート２０の第１開口２１における右側の縁部の近傍に配置され、他方の軸受部２３は第１開口２１における左側の縁部の近傍に配置されている。本実施形態では、軸受部２３はベースプレート２０の一部が折り曲げられて形成され、鉛直断面形状が略Ｌ字状とされている。シェード７０が第１開口２１に挿通されるとともに、シャフト２５の両端部がそれぞれ軸受部２３に固定されることで、シェード７０はベースプレート２０に回動可能に支持される。上記のように、２つの軸受部２３は水平方向に並列されているため、軸受部２３に固定されるシャフト２５はベースプレート２０の面方向に沿って水平方向に延在し、シェード７０はベースプレート２０の面方向に沿って水平方向に延びる方向を軸として回動可能とされている。言い換えると、シェード７０は、ベースプレート２０の面方向と平行かつ水平な方向を軸として回動可能とされている。また、上記のように、シェード７０の重心がシャフト２５の中心軸上に位置しているため、このシェード７０の重心は、当該シェード７０の回動軸上に位置していると理解できる。なお、シェード７０の重心は、当該シェード７０の回動軸上に位置していなくても良い。 As shown in FIGS. 3 and 4, such a shade 70 can be rotated about the shaft 25 by inserting the columnar shaft 25 into the through holes 74 h of the pair of connection portions 74. The In the present embodiment, the center of gravity of the shade 70 is located on the central axis of the shaft 25. Further, the contact surface 77 s of the contact portion 77 in the magnetic portion 75 is parallel to the extending direction of the shaft 25. The shaft 25 inserted into the through hole 74 h in the shade 70 is fixed to the base plate 20 in this way, so that the shade 70 is rotatably supported by the base plate 20. More specifically, as shown in FIGS. 3 and 4, the base plate 20 is formed with a pair of bearing portions 23 that protrude forward, which is the projection lens 60 side. The pair of bearing portions 23 are juxtaposed in the horizontal direction, and one bearing portion 23 is disposed in the vicinity of the right edge of the first opening 21 of the base plate 20, and the other bearing portion 23 is the left side of the first opening 21. It is arrange | positioned in the vicinity of the edge part. In the present embodiment, the bearing portion 23 is formed by bending a part of the base plate 20, and the vertical cross-sectional shape is substantially L-shaped. The shade 70 is inserted into the first opening 21, and both end portions of the shaft 25 are fixed to the bearing portion 23, so that the shade 70 is rotatably supported by the base plate 20. As described above, since the two bearing portions 23 are arranged in parallel in the horizontal direction, the shaft 25 fixed to the bearing portion 23 extends in the horizontal direction along the surface direction of the base plate 20, and the shade 70 is connected to the base plate 20. It can be rotated about the direction extending in the horizontal direction along the surface direction. In other words, the shade 70 is rotatable about a direction parallel and horizontal to the surface direction of the base plate 20. Further, as described above, since the center of gravity of the shade 70 is located on the central axis of the shaft 25, it can be understood that the center of gravity of the shade 70 is located on the rotation axis of the shade 70. Note that the center of gravity of the shade 70 may not be located on the rotation axis of the shade 70.
　このようにシェード７０がベースプレート２０に支持されている状態において、シェード７０の本体部７１における遮光部７３及び規制突起部７４ｂは、ベースプレート２０よりも光源３０側に位置し、反射部７２はベースプレート２０よりも投影レンズ６０側に位置している。このため、シェード７０の遮光部７３は光源３０と投影レンズ６０との間に位置しており、当該遮光部７３は光源３０からの光の一部を遮る。光源３０から出射する光が遮光部７３によって制御されて投影レンズ６０の入射面６２に入射することにより、遮光部７３の形態に応じた配光パターンの光が投影レンズ６０の出射面６３から出射される。この投影レンズ６０の出射面６３から出射される光は、フロントカバー１２を透過して車両の外部である車両の前方に向けて出射される。 Thus, in the state where the shade 70 is supported by the base plate 20, the light shielding portion 73 and the regulation protrusion 74 b in the main body portion 71 of the shade 70 are located closer to the light source 30 than the base plate 20, and the reflection portion 72 is the base plate 20. It is located closer to the projection lens 60 side. For this reason, the light shielding part 73 of the shade 70 is located between the light source 30 and the projection lens 60, and the light shielding part 73 blocks a part of the light from the light source 30. Light emitted from the light source 30 is controlled by the light shielding unit 73 and is incident on the incident surface 62 of the projection lens 60, so that light having a light distribution pattern corresponding to the form of the light shielding unit 73 is emitted from the emission surface 63 of the projection lens 60. Is done. The light emitted from the emission surface 63 of the projection lens 60 passes through the front cover 12 and is emitted toward the front of the vehicle outside the vehicle.
　また、ベースプレート２０の第１開口２１の縁部には、図４に示すように、本体部７１における一対の接続部７４に沿って光源３０側にそれぞれ突出する一対の押え部２４が形成されている。このため、シェード７０のベースプレート２０に対するシャフト２５の軸方向における移動が規制されている。本実施形態では、押え部２４はベースプレート２０の一部が折り曲げられることによって形成されている。 Further, as shown in FIG. 4, a pair of pressing portions 24 that protrude toward the light source 30 side along the pair of connection portions 74 in the main body portion 71 are formed at the edge portion of the first opening 21 of the base plate 20. Yes. For this reason, the movement in the axial direction of the shaft 25 with respect to the base plate 20 of the shade 70 is restricted. In the present embodiment, the presser portion 24 is formed by bending a part of the base plate 20.
　また、ベースプレート２０とシェード７０との間には、トーションスプリング２６が介装されている。具体的には、一対の接続部７４の間には、シャフト２５が挿入されたトーションスプリング２６が配置されている。トーションスプリング２６の一端部は、係止部７６に下方側から当接して当該係止部７６に係止され、トーションスプリング２６の他端部はベースプレート２０の第１開口２１の縁部の近傍に光源３０側から当接して当該ベースプレート２０に係止されている。このトーションスプリング２６の弾性力は、図２においてシャフト２５を軸としてシェード７０を反時計回りに回動させるようにシェード７０に作用している。そして、一対の接続部７４にそれぞれ形成される規制突起部７４ｂは、それぞれベースプレート２０の第１開口２１の縁部の近傍に光源３０側から押し付けられ、シェード７０はシャフト２５を軸として回動しないように保持されている。このため、トーションスプリング２６は、図２においてシャフト２５を軸としてシェード７０が反時計回りに回動する方向に向けてシェード７０を付勢する付勢部材であり、トーションスプリング２６の弾性力がこのような付勢をする付勢力であると理解できる。 Further, a torsion spring 26 is interposed between the base plate 20 and the shade 70. Specifically, the torsion spring 26 into which the shaft 25 is inserted is disposed between the pair of connection portions 74. One end of the torsion spring 26 abuts on the locking portion 76 from below and is locked to the locking portion 76, and the other end of the torsion spring 26 is near the edge of the first opening 21 of the base plate 20. Abutting from the light source 30 side, the base plate 20 is engaged. The elastic force of the torsion spring 26 acts on the shade 70 so as to rotate the shade 70 counterclockwise around the shaft 25 in FIG. The regulation protrusions 74b formed on the pair of connection parts 74 are pressed from the light source 30 side in the vicinity of the edge of the first opening 21 of the base plate 20, respectively, and the shade 70 does not rotate around the shaft 25. So that it is held. Therefore, the torsion spring 26 is an urging member that urges the shade 70 in a direction in which the shade 70 rotates counterclockwise about the shaft 25 in FIG. It can be understood that it is an urging force that urges such a force.
　図２、図４に示すように、電磁石８０は、磁性体から成るコア８１と、コア８１に巻かれた巻線から成るコイル８２と、磁性体から成るヨーク８３とを有する。なお、コア８１及びヨーク８３における磁性体としては、例えば、鉄、コバルト、ニッケル等が挙げられ、それぞれの磁性体は互いに同じ磁性体とされても良く、異なる磁性体とされても良い。 2 and 4, the electromagnet 80 has a core 81 made of a magnetic material, a coil 82 made of a winding wound around the core 81, and a yoke 83 made of a magnetic material. In addition, as a magnetic body in the core 81 and the yoke 83, iron, cobalt, nickel etc. are mentioned, for example, Each magnetic body may be made into the same magnetic body mutually, and may be made into a different magnetic body.
　コア８１は、直線状に延在する円柱形状とされ、コア８１の両端部は、それぞれコイル８２の端部から突出している。このコア８１におけるコイル８２の内部に位置する部位、つまり巻線が巻かれる部位における直径は、概ね同一の直径とされる。また、一方の端部８１ａにおける直径は、コイル８２の内部に位置する部位の直径よりも小とされ、他方の端部８１ｂにおける直径は、コイル８２の内部に位置する部位の直径よりも大とされている。コイル８２は上記のように円柱状のコア８１に巻かれた巻線から成るため、当該コイル８２はコア８１の延在方向に沿って延在している。 The core 81 has a columnar shape extending linearly, and both end portions of the core 81 protrude from the end portions of the coils 82, respectively. The diameter of the portion of the core 81 located inside the coil 82, that is, the portion where the winding is wound, is approximately the same diameter. Further, the diameter at one end 81a is smaller than the diameter of the portion located inside the coil 82, and the diameter at the other end 81b is larger than the diameter of the portion located inside the coil 82. Has been. Since the coil 82 is composed of the winding wound around the cylindrical core 81 as described above, the coil 82 extends along the extending direction of the core 81.
　ヨーク８３は、一対の板状の側壁部８４と、板状の底壁部８５とを有する。一対の側壁部８４は、コイル８２の外側で当該コイル８２の延在方向に沿って延在し、互いに対向している。底壁部８５の中央部には貫通孔が形成され、当該貫通孔にコア８１の一方の端部８１ａが挿入されている。また、底壁部８５の外周縁部には、一対の側壁部８４におけるコア８１の一方の端部８１ａ側の端部がそれぞれ接続されている。また、一対の側壁部８４におけるコア８１の他方の端部８１ｂ側の端面は、このコア８１の他方の端部８１ｂよりも底壁部８５側と反対側にそれぞれ位置し、それぞれの端面はコイル８２の延在方向に垂直な同一平面上に位置する平坦な当接面８４ｓとされる。また、一対の側壁部８４間の幅は、上記シェード７０における一対の誘導部７８間の幅よりも小とされている。 The yoke 83 has a pair of plate-like side wall portions 84 and a plate-like bottom wall portion 85. The pair of side wall portions 84 extend outside the coil 82 along the extending direction of the coil 82 and face each other. A through hole is formed at the center of the bottom wall portion 85, and one end 81a of the core 81 is inserted into the through hole. In addition, to the outer peripheral edge portion of the bottom wall portion 85, end portions on the one end portion 81 a side of the core 81 in the pair of side wall portions 84 are respectively connected. Further, the end surfaces of the pair of side wall portions 84 on the other end portion 81b side of the core 81 are located on the opposite side of the other end portion 81b of the core 81 from the bottom wall portion 85 side, and the respective end surfaces are coiled. The flat contact surface 84 s is located on the same plane perpendicular to the extending direction of 82. The width between the pair of side wall portions 84 is set to be smaller than the width between the pair of guide portions 78 in the shade 70.
　このような電磁石８０は、コイル８２に電流が通電されることによって当該コイル８２によって磁界が発生する。磁性体から成るコア８１にはコイル８２を形成する巻線が巻かれているため、このコア８１はコイル８２によって発生する磁界の磁束線の一部に沿って延在している。このため、コア８１には磁場集中が生じている。また、ヨーク８３の一対の側壁部８４は、コイル８２の外側で当該コイル８２の延在方向に沿って延在している。このため、この一対の側壁部８４はコイル８２によって発生する磁界の磁束線の一部に沿って延在している。このため、一対の側壁部８４には磁場集中が生じている。従って、電磁石８０はコイル８２に電流が通電されることによって磁力を生じ、磁性体は磁場集中が生じているコア８１の端部やヨーク８３の一対の側壁部８４の端部に引き付けられる。なお、コイル８２が非通電状態である場合、電磁石８０は磁力を発生しない。 In such an electromagnet 80, when a current is passed through the coil 82, a magnetic field is generated by the coil 82. Since the winding which forms the coil 82 is wound around the core 81 made of a magnetic material, the core 81 extends along a part of the magnetic flux lines of the magnetic field generated by the coil 82. For this reason, magnetic field concentration occurs in the core 81. In addition, the pair of side wall portions 84 of the yoke 83 extends along the extending direction of the coil 82 on the outside of the coil 82. Therefore, the pair of side wall portions 84 extend along a part of the magnetic flux lines of the magnetic field generated by the coil 82. For this reason, magnetic field concentration occurs in the pair of side wall portions 84. Accordingly, the electromagnet 80 generates a magnetic force when a current is passed through the coil 82, and the magnetic body is attracted to the end of the core 81 where the magnetic field is concentrated or the end of the pair of side walls 84 of the yoke 83. When the coil 82 is in a non-energized state, the electromagnet 80 does not generate a magnetic force.
　図２に示すように、このような電磁石８０は、コア８１の中心軸ＣＡがベースプレート２０よりも光源３０側において当該ベースプレート２０の面方向と平行かつ鉛直方向に延び、当該電磁石８０がシェード７０の当接部７７の下方に位置するように配置される。このため、コア８１の延在方向はベースプレート２０の面方向と平行であり、コア８１の両端の中心８１ａｃ，８１ｂｃは、ベースプレート２０よりも光源３０側に位置している。また、ヨーク８３の一対の側壁部８４は前後及び鉛直方向に延在し、電磁石８０のうちこの一対の側壁部８４の当接面８４ｓがシェード７０の当接部７７の最も近くに位置している。また、一対の側壁部８４の当接面８４ｓはシャフト２５の延在方向と平行とされている。また、ヨーク８３における一対の側壁部８４の当接面８４ｓは、シェード７０がシャフト２５を軸として回動した際に当接部７７が通過する空間内に位置し、側壁部８４の当接面８４ｓから延びる法線は、当接部７７の当接面７７ｓと交わる。なお、電磁石８０の一部は、ベースプレート２０の第２開口２２を介してベースプレート２０よりも投影レンズ６０側に突出しているものの、コア８１は、ベースプレート２０よりも投影レンズ６０側に非配置とされている。なお、電磁石８０は図示せぬ手段によってベースプレート２０に固定されている。 As shown in FIG. 2, in such an electromagnet 80, the central axis CA of the core 81 extends in a direction perpendicular to the surface direction of the base plate 20 on the light source 30 side of the base plate 20. It arrange | positions so that it may be located under the contact part 77. FIG. Therefore, the extending direction of the core 81 is parallel to the surface direction of the base plate 20, and the centers 81ac and 81bc at both ends of the core 81 are located closer to the light source 30 than the base plate 20. Further, the pair of side wall portions 84 of the yoke 83 extend in the front-rear and vertical directions, and the contact surfaces 84 s of the pair of side wall portions 84 of the electromagnet 80 are located closest to the contact portion 77 of the shade 70. Yes. Further, the contact surfaces 84 s of the pair of side wall portions 84 are parallel to the extending direction of the shaft 25. Further, the contact surfaces 84 s of the pair of side wall portions 84 in the yoke 83 are located in a space through which the contact portion 77 passes when the shade 70 rotates about the shaft 25, and the contact surfaces of the side wall portions 84. The normal extending from 84 s intersects the contact surface 77 s of the contact portion 77. Although a part of the electromagnet 80 protrudes toward the projection lens 60 from the base plate 20 via the second opening 22 of the base plate 20, the core 81 is not arranged on the projection lens 60 side from the base plate 20. ing. The electromagnet 80 is fixed to the base plate 20 by means (not shown).
　図６は、図２の一部を拡大した図であり、シェード７０及び電磁石８０の近傍を拡大した図である。図６に示すように、シャフト２５の延在方向から見る場合において、シャフト２５とヨーク８３における一対の側壁部８４の当接面８４ｓ上の任意の点Ｐ１とを結ぶ線分ＬＳ１と当接面８４ｓとのなす角は、シャフト２５と当該シャフト２５を中心として当接面８４ｓ上の上記の任意の点Ｐ１を通る円Ｃと磁性部７５における当接面７７ｓとの交点Ｐ２とを結ぶ線分ＬＳ２と当接面７７ｓとのなす角と概ね同じとされている。 FIG. 6 is an enlarged view of a part of FIG. 2, and is an enlarged view of the vicinity of the shade 70 and the electromagnet 80. As shown in FIG. 6, when viewed from the extending direction of the shaft 25, the line segment LS <b> 1 connecting the shaft 25 and an arbitrary point P <b> 1 on the contact surface 84 s of the pair of side walls 84 in the yoke 83 and the contact surface. The angle formed by 84s is a line segment connecting the shaft 25 and the circle C passing through the arbitrary point P1 on the contact surface 84s with the shaft 25 as the center and the intersection P2 of the contact surface 77s in the magnetic part 75. The angle between LS2 and the contact surface 77s is substantially the same.
　また、一対の誘導部７８は、上記のように当接部７７の左右方向における端部から下方側へ突出しており、当該電磁石８０はシェード７０の当接部７７の下方に配置され、電磁石８０のうちヨーク８３の一対の側壁部８４の当接面８４ｓがシェード７０の当接部７７の最も近くに位置している。このため、図２に示す状態では、一対の誘導部７８は当接部７７よりも電磁石８０のヨーク８３側に突出していると理解できる。 Further, as described above, the pair of guide portions 78 protrudes downward from the end portion of the contact portion 77 in the left-right direction, and the electromagnet 80 is disposed below the contact portion 77 of the shade 70. Of these, the contact surfaces 84 s of the pair of side wall portions 84 of the yoke 83 are located closest to the contact portion 77 of the shade 70. For this reason, in the state shown in FIG. 2, it can be understood that the pair of guide portions 78 protrudes toward the yoke 83 of the electromagnet 80 from the contact portion 77.
　次に、本実施形態の前照灯１の動作について説明する。 Next, the operation of the headlamp 1 of this embodiment will be described.
　図７は、電磁石が非通電状態とされた状態を示す図であり、光源から出射される光の光路例を概略的に示す図である。なお、図７では、発光制御回路３５、ヒートシンク４０における放熱フィン４３，４４等の記載は省略されている。また、各反射面の角度、光の反射角や屈折角等は正確でない場合がある。また、上記のように、前照灯は車両の左右に対称に設けられる。以下の配光の説明では、左右に設けられる前照灯が同様に点灯または消灯する場合の配光について説明する。 FIG. 7 is a diagram illustrating a state where the electromagnet is in a non-energized state, and is a diagram schematically illustrating an example of an optical path of light emitted from the light source. In FIG. 7, descriptions of the light emission control circuit 35 and the heat radiation fins 43 and 44 in the heat sink 40 are omitted. In addition, the angle of each reflecting surface, the light reflection angle, the refraction angle, and the like may not be accurate. Further, as described above, the headlamps are provided symmetrically on the left and right sides of the vehicle. In the following description of the light distribution, the light distribution when the headlights provided on the left and right are similarly turned on or off will be described.
　図７に示すように、電磁石８０が非通電状態とされる場合、付勢部材であるトーションスプリング２６の付勢力によってシェード７０における接続部７４の規制突起部７４ｂがベースプレート２０に光源３０側から押し付けられ、シェード７０はシャフト２５を軸として回動しないように保持される。つまり、付勢部材であるトーションスプリング２６の付勢力によって、シェード７０が所定の位置に位置決めされている。このような状態において、光源３０からの白色の光は、主にロービーム用リフレクタ５１のロービーム用反射面５１Ｒ、ハイビーム用リフレクタ５２のハイビーム用反射面５２Ｒ、及びサブリフレクタ５３のサブ反射面５３Ｒで反射される。ロービーム用反射面５１Ｒ及びハイビーム用反射面５２Ｒで反射される光の一部は、シェード７０の遮光部７３によって遮蔽され、この光の他の一部は、ベースプレート２０の第１開口２１を通過して投影レンズ６０の入射面６２に入射し、出射面６３から出射する。サブ反射面５３Ｒで反射される光は、主にベースプレート２０の第１開口２１を通過するものの、その多くはシェード７０の反射部７２よりも投影レンズ６０側を上方から下方に横切り投影レンズ６０には入射されない。このようにして投影レンズ６０の出射面６３から出射した光は、フロントカバー１２を透過して車両の前方に向けて出射される。本実施形態の遮光部７３は、シェード７０がこのように保持された状態において、投影レンズ６０の出射面６３から出射する光の配光パターンがロービームの配光パターンとなるように光源３０からの光の一部を遮る。このため、前照灯１からロービームが出射される。 As shown in FIG. 7, when the electromagnet 80 is in a non-energized state, the restricting projection 74 b of the connecting portion 74 in the shade 70 is pressed against the base plate 20 from the light source 30 side by the biasing force of the torsion spring 26 that is a biasing member. The shade 70 is held so as not to rotate about the shaft 25. That is, the shade 70 is positioned at a predetermined position by the urging force of the torsion spring 26 that is an urging member. In such a state, the white light from the light source 30 is reflected mainly by the low-beam reflecting surface 51R of the low-beam reflector 51, the high-beam reflecting surface 52R of the high-beam reflector 52, and the sub-reflecting surface 53R of the sub-reflector 53. Is done. A part of the light reflected by the low beam reflecting surface 51R and the high beam reflecting surface 52R is shielded by the light shielding portion 73 of the shade 70, and the other part of the light passes through the first opening 21 of the base plate 20. Then, the light enters the incident surface 62 of the projection lens 60 and exits from the exit surface 63. Although the light reflected by the sub-reflecting surface 53R mainly passes through the first opening 21 of the base plate 20, most of the light crosses the projection lens 60 side from the reflection lens 72 of the shade 70 downward from above to the projection lens 60. Is not incident. Thus, the light emitted from the emission surface 63 of the projection lens 60 is transmitted through the front cover 12 and emitted toward the front of the vehicle. In the state where the shade 70 is held in this manner, the light-shielding unit 73 of the present embodiment has a light distribution pattern from the light source 30 so that the light distribution pattern of the light emitted from the emission surface 63 of the projection lens 60 becomes a low beam distribution pattern. Block out some of the light. For this reason, a low beam is emitted from the headlamp 1.
　図８は、電磁石が通電状態とされた状態を示す図であり、光源から出射される光の光路例を概略的に示す図である。図７に示す状態において、電磁石８０が通電状態にされると、上記のように、電磁石８０は磁力を生じ、磁性体は磁場集中が生じているコア８１の端部やヨーク８３の一対の側壁部８４の端部に引き付けられる。シェード７０は磁性体から成る板状部材から成形されており、電磁石８０はシェード７０の当接部７７の下方に配置され、電磁石８０のうち一対の側壁部８４の当接面８４ｓがシェード７０の当接部７７の最も近くに位置している。このため、シェード７０には、当該シェード７０が電磁石８０におけるコア８１の両方の端部８１ｂ及び一対の側壁部８４の当接面８４ｓが位置する側に引き付けられるように磁力が作用する。このシェード７０に作用する電磁石８０の磁力がトーションスプリング２６の付勢力に抗することによって、当該シェード７０は、シャフト２５を軸として当接部７７が一対の側壁部８４の当接面８４ｓに近づくように、つまり、図７において時計回りに回動される。ヨーク８３における一対の側壁部８４の当接面８４ｓは、シェード７０がシャフト２５を軸として回動した際に当接部７７が通過する空間内に位置している。このため、図８に示すように、磁性部７５における当接部７７がヨーク８３における一対の側壁部８４の当接面８４ｓに当接し、シェード７０は電磁石８０の磁力によってシャフト２５を軸として回動しないように保持される。つまり、電磁石８０の磁力によって、シェード７０が別の所定の位置に位置決めされる。このため、ヨーク８３は、シェード７０の位置決めを行う際に磁性部７５の当接部７７が当接される位置決め部材であると理解できる。なお、一対の側壁部８４間の幅は、シェード７０における一対の誘導部７８間の幅よりも小とされており、シェード７０の磁性部７５の誘導部７８がヨーク８３に接触せずに当接部７７が一対の側壁部８４の当接面８４ｓに当接される。 FIG. 8 is a diagram showing a state where the electromagnet is energized, and is a diagram schematically showing an example of an optical path of light emitted from the light source. In the state shown in FIG. 7, when the electromagnet 80 is energized, as described above, the electromagnet 80 generates a magnetic force, and the magnetic body has an end portion of the core 81 and a pair of side walls of the yoke 83 where the magnetic field is concentrated. It is attracted to the end of the portion 84. The shade 70 is formed from a plate-like member made of a magnetic material. The electromagnet 80 is disposed below the contact portion 77 of the shade 70, and the contact surfaces 84 s of the pair of side wall portions 84 of the electromagnet 80 are the shade 70. It is located closest to the contact portion 77. Therefore, a magnetic force acts on the shade 70 so that the shade 70 is attracted to the side where the both end portions 81b of the core 81 in the electromagnet 80 and the contact surfaces 84s of the pair of side wall portions 84 are located. When the magnetic force of the electromagnet 80 acting on the shade 70 resists the biasing force of the torsion spring 26, the abutment portion 77 of the shade 70 approaches the abutment surface 84 s of the pair of side wall portions 84 about the shaft 25. That is, it is rotated clockwise in FIG. The contact surfaces 84 s of the pair of side wall portions 84 in the yoke 83 are located in a space through which the contact portions 77 pass when the shade 70 rotates about the shaft 25. For this reason, as shown in FIG. 8, the abutting portion 77 of the magnetic portion 75 abuts against the abutting surfaces 84 s of the pair of side wall portions 84 of the yoke 83, and the shade 70 rotates around the shaft 25 by the magnetic force of the electromagnet 80. It is held so as not to move. That is, the shade 70 is positioned at another predetermined position by the magnetic force of the electromagnet 80. For this reason, the yoke 83 can be understood to be a positioning member with which the contact portion 77 of the magnetic portion 75 contacts when the shade 70 is positioned. Note that the width between the pair of side wall portions 84 is smaller than the width between the pair of guide portions 78 in the shade 70, and the guide portion 78 of the magnetic portion 75 of the shade 70 does not contact the yoke 83. The contact portion 77 contacts the contact surfaces 84 s of the pair of side wall portions 84.
　本実施形態では、上記のように、シャフト２５の延在方向から見る場合において、シャフト２５とヨーク８３における一対の側壁部８４の当接面８４ｓ上の任意の点Ｐ１とを結ぶ線分ＬＳ１と当接面８４ｓとのなす角は、シャフト２５と当該シャフト２５を中心として当接面８４ｓ上の上記の任意の点Ｐ１を通る円Ｃと磁性部７５における当接面７７ｓとの交点Ｐ２とを結ぶ線分ＬＳ２と当接面７７ｓとのなす角と概ね同じとされている。このため、当接部７７の当接面７７ｓと一対の側壁部８４の当接面８４ｓとが互いに面接触する。つまり、磁性部７５とヨーク８３とは、互いに当接する当接面７７ｓ，８４ｓをそれぞれ有していると理解できる。 In the present embodiment, as described above, when viewed from the extending direction of the shaft 25, the line segment LS1 connecting the shaft 25 and an arbitrary point P1 on the contact surface 84s of the pair of side wall portions 84 in the yoke 83, The angle formed by the contact surface 84s is an intersection point P2 between the shaft 25 and the circle C passing through the arbitrary point P1 on the contact surface 84s with the shaft 25 as a center and the contact surface 77s of the magnetic portion 75. The angle between the connecting line segment LS2 and the contact surface 77s is substantially the same. For this reason, the contact surface 77s of the contact portion 77 and the contact surfaces 84s of the pair of side wall portions 84 are in surface contact with each other. That is, it can be understood that the magnetic part 75 and the yoke 83 have contact surfaces 77s and 84s that contact each other.
　図８に示す状態において、前照灯１からロービームが出射される場合と同様に、光源３０からの光は、主にロービーム用リフレクタ５１のロービーム用反射面５１Ｒ、ハイビーム用リフレクタ５２のハイビーム用反射面５２Ｒ、及びサブリフレクタ５３のサブ反射面５３Ｒで反射される。ロービーム用反射面５１Ｒ及びハイビーム用反射面５２Ｒで反射される光の一部は、シェード７０の遮光部７３によって遮蔽され、この光の他の一部は、ベースプレート２０の第１開口２１を通過して投影レンズ６０の入射面６２に入射し、出射面６３から出射する。遮光部７３は、図７に示す状態から下方へ移動するとともに後方へ傾倒されている。このため、遮光部７３は、ロービーム用反射面５１Ｒ及びハイビーム用反射面５２Ｒに対する位置が変化しており、遮光部７３による遮光範囲が変化されている。反射部７２はシェード７０の一部とされているため、反射部７２はシェード７０が回動することでベースプレート２０と投影レンズ６０との間において所定の方向に回動する。そして、シェード７０の反射部７２における反射面７２Ｒは、図７に示す状態から水平に近づくように傾けられ、前方側の端部がより前方に位置し、当該反射面７２Ｒはサブ反射面５３Ｒで反射される光の光路上に移動されている。このため、サブ反射面５３Ｒで反射される光は、反射面７２Ｒによって反射され、投影レンズ６０の入射面６２に入射し、出射面６３から出射する。つまり、反射部７２は、光源３０から出射する光のうち投影レンズ６０の入射面６２に向かう光とは異なる光の一部を反射して投影レンズ６０の入射面６２に入射させる。このように、遮光部７３による遮光範囲が変化するとともに、反射面７２Ｒによって反射された光が投影レンズ６０の出射面６３から出射するため、投影レンズ６０の出射面６３から出射する光の配光パターンがロービームの配光パターンと異なる配光パターンになる。本実施形態では、シェード７０がこのように保持された状態において投影レンズ６０の出射面６３から出射する光の配光パターンがハイビームの配光パターンとなるように、遮光部７３は光源３０からの光の一部を遮り、反射面７２Ｒはサブ反射面５３Ｒで反射される光を反射する。 In the state shown in FIG. 8, the light from the light source 30 is mainly reflected by the low-beam reflecting surface 51 </ b> R of the low-beam reflector 51 and the high-beam reflecting of the high-beam reflector 52 in the same manner as when the low beam is emitted from the headlamp 1. Reflected by the surface 52R and the sub-reflecting surface 53R of the sub-reflector 53. A part of the light reflected by the low beam reflecting surface 51R and the high beam reflecting surface 52R is shielded by the light shielding portion 73 of the shade 70, and the other part of the light passes through the first opening 21 of the base plate 20. Then, the light enters the incident surface 62 of the projection lens 60 and exits from the exit surface 63. The light shielding portion 73 moves downward from the state shown in FIG. 7 and is tilted backward. For this reason, the position of the light shielding portion 73 with respect to the low beam reflecting surface 51R and the high beam reflecting surface 52R is changed, and the light shielding range by the light shielding portion 73 is changed. Since the reflecting portion 72 is a part of the shade 70, the reflecting portion 72 rotates in a predetermined direction between the base plate 20 and the projection lens 60 when the shade 70 rotates. Then, the reflection surface 72R of the reflection portion 72 of the shade 70 is inclined so as to approach the horizontal from the state shown in FIG. 7, the front end is positioned more forward, and the reflection surface 72R is a sub-reflection surface 53R. It is moved on the optical path of the reflected light. For this reason, the light reflected by the sub-reflecting surface 53R is reflected by the reflecting surface 72R, enters the incident surface 62 of the projection lens 60, and exits from the exit surface 63. That is, the reflecting unit 72 reflects a part of the light emitted from the light source 30 that is different from the light directed to the incident surface 62 of the projection lens 60 and causes the light to enter the incident surface 62 of the projection lens 60. As described above, the light shielding range by the light shielding unit 73 is changed and the light reflected by the reflecting surface 72R is emitted from the emission surface 63 of the projection lens 60. Therefore, the light distribution of the light emitted from the emission surface 63 of the projection lens 60 is distributed. The pattern is different from the low beam distribution pattern. In the present embodiment, the light shielding unit 73 is provided from the light source 30 so that the light distribution pattern of light emitted from the emission surface 63 of the projection lens 60 becomes a high beam light distribution pattern in a state where the shade 70 is held in this manner. A part of the light is blocked, and the reflecting surface 72R reflects the light reflected by the sub-reflecting surface 53R.
　なお、図８に示す状態において、電磁石８０のコイル８２が非通電状態とされると、付勢部材であるトーションスプリング２６の付勢力によって、シェード７０が図７に示す所定の位置に位置決めされる。つまり、本実施形態の前照灯１では、電磁石８０の通電と非通電とを切り替えることによって、配光を切り替えられる。また、シェード７０は、図７に示すコイル８２が非通電状態での位置と図８に示すコイル８２が通電状態での位置との間で回動するため、図６に示すコイル８２が非通電状態である状態が当接部７７とヨーク８３とが最も離間した状態である。そして、トーションスプリング２６は、磁性部７５がヨーク８３から離間するように回動する方向に向けてシェード７０を付勢している。言い換えると、トーションスプリング２６は、電磁石８０の磁力を用いて回動される方向と反対方向に向けてシェード７０を付勢している。 In the state shown in FIG. 8, when the coil 82 of the electromagnet 80 is in a non-energized state, the shade 70 is positioned at the predetermined position shown in FIG. 7 by the urging force of the torsion spring 26 that is an urging member. . That is, in the headlamp 1 of the present embodiment, the light distribution can be switched by switching between energization and non-energization of the electromagnet 80. Further, since the shade 70 rotates between a position when the coil 82 shown in FIG. 7 is in a non-energized state and a position where the coil 82 shown in FIG. 8 is in an energized state, the coil 82 shown in FIG. The state that is a state is a state in which the contact portion 77 and the yoke 83 are farthest apart. The torsion spring 26 urges the shade 70 in a direction in which the magnetic part 75 rotates so as to be separated from the yoke 83. In other words, the torsion spring 26 urges the shade 70 in a direction opposite to the direction in which the torsion spring 26 is rotated using the magnetic force of the electromagnet 80.
　ところで、光源ユニットが例えば車両用灯具に用いられる場合、光源ユニットは車両の振動に起因して振動する。上記特許文献１の光源ユニットのように磁力によってシェードの位置決めを行う場合、光源ユニットが振動するとシェードの位置がずれて、意図せず配光パターンが変化する虞がある。このため、光源ユニットが振動する場合であっても、意図せず配光パターンが変化することを抑制したいとの要請がある。 By the way, when the light source unit is used for, for example, a vehicle lamp, the light source unit vibrates due to the vibration of the vehicle. When the shade is positioned by a magnetic force as in the light source unit of Patent Document 1, when the light source unit vibrates, the position of the shade is displaced, and the light distribution pattern may change unintentionally. For this reason, even when the light source unit vibrates, there is a demand for suppressing unintentional changes in the light distribution pattern.
　そこで、第１の態様としての本実施形態の光源ユニット３は、光源３０と、磁性体から成る磁性部７５を有し光源３０から出射する光の一部を遮るとともに所定の方向に移動可能とされるシェード７０と、磁性体から成る位置決め部材であるヨーク８３を有する電磁石８０と、を備える。電磁石８０の磁力によってシェード７０の磁性部７５が電磁石８０のヨーク８３に当接される。 Therefore, the light source unit 3 of the present embodiment as the first mode includes the light source 30 and the magnetic part 75 made of a magnetic material, and blocks a part of the light emitted from the light source 30 and can move in a predetermined direction. And an electromagnet 80 having a yoke 83 which is a positioning member made of a magnetic material. The magnetic part 75 of the shade 70 is brought into contact with the yoke 83 of the electromagnet 80 by the magnetic force of the electromagnet 80.
　第１の態様としての本実施形態の光源ユニット３では、上記のように、所定の方向に移動可能とされるシェード７０は磁性体から成る磁性部７５を有するため、電磁石を通電状態にすることでシェード７０の磁性部７５に電磁石の磁力を作用させてシェード７０を所定の方向に移動させ得る。このシェード７０は、光源３０から出射する光の一部を遮るため、シェード７０が移動されることによってシェード７０による遮光範囲が変化し得る。このため、配光パターンを変化させ得る。ところで、電磁石の磁力は電磁石の磁性体を含む部材、例えばコアやヨーク等から離れると弱くなる傾向にある。第１の態様としての本実施形態の光源ユニット３では、電磁石８０の磁力によってシェード７０の磁性部７５が電磁石８０における磁性体を含むヨーク８３に当接される。このため、上記特許文献１に記載の光源ユニットのようにシェード７０の磁性部７５が電磁石８０における磁性体を含む部材に当接しない場合と比べて、シェード７０の磁性部７５には強い磁力が作用し、シェード７０をより強固に保持して位置決めできる。このため、光源ユニット３が振動する場合であっても、電磁石８０に対するシェード７０の位置がずれることを抑制でき、意図しない配光パターンの変化を抑制し得る。 In the light source unit 3 of the present embodiment as the first aspect, as described above, the shade 70 that can be moved in the predetermined direction has the magnetic portion 75 made of a magnetic material, so that the electromagnet is energized. Thus, the shade 70 can be moved in a predetermined direction by applying the magnetic force of the electromagnet to the magnetic portion 75 of the shade 70. Since the shade 70 blocks a part of the light emitted from the light source 30, the light shielding range by the shade 70 can be changed by moving the shade 70. For this reason, a light distribution pattern can be changed. By the way, the magnetic force of the electromagnet tends to become weaker when it is separated from a member including the magnetic body of the electromagnet, such as a core or a yoke. In the light source unit 3 of the present embodiment as the first mode, the magnetic part 75 of the shade 70 is brought into contact with the yoke 83 including the magnetic body in the electromagnet 80 by the magnetic force of the electromagnet 80. For this reason, compared with the case where the magnetic part 75 of the shade 70 does not contact the member including the magnetic body in the electromagnet 80 as in the light source unit described in Patent Document 1, the magnetic part 75 of the shade 70 has a stronger magnetic force. It acts and can hold and position shade 70 more firmly. For this reason, even if it is a case where the light source unit 3 vibrates, it can suppress that the position of the shade 70 with respect to the electromagnet 80 shifts | deviates, and can suppress the change of the light distribution pattern which is not intended.
　第１の態様としての本実施形態では、シェード７０の磁性体から成る磁性部７５が磁性体から成るヨーク８３に当接される。つまり、磁性部７５における磁性体がヨーク８３における磁性体に当接される。ここで、磁力を生じる部材と磁性体から成る部材とが離間していたり、これらの部材間に非磁性体が介在していたりする場合、これらの部材間において磁束が拡散してしまう。しかし、磁力を生じる部材と磁性体から成る部材とが直接当接している場合、これらの部材間で磁束が拡散することが抑制され、磁性体から成る部材にはより強い磁力が作用する。第１の態様としての本実施形態の光源ユニット３では、ヨーク８３は磁性体から成るためこのヨーク８３には磁場が集中しており、このような磁場集中が生じているヨーク８３に磁性体からなる磁性部７５が直接当接する。このため、磁性体から成るヨーク８３と磁性体から成る磁性部７５とが直接当接しない場合と比べて、シェード７０の磁性部７５により強い磁力を作用させることができ、シェード７０をより強固に保持して位置決めできる。 In the present embodiment as the first aspect, the magnetic part 75 made of a magnetic body of the shade 70 is brought into contact with a yoke 83 made of a magnetic body. That is, the magnetic body in the magnetic part 75 is brought into contact with the magnetic body in the yoke 83. Here, when a member that generates a magnetic force is separated from a member made of a magnetic material, or a non-magnetic material is interposed between these members, the magnetic flux is diffused between these members. However, when a member that generates magnetic force and a member made of a magnetic material are in direct contact with each other, diffusion of magnetic flux between these members is suppressed, and a stronger magnetic force acts on the member made of a magnetic material. In the light source unit 3 of the present embodiment as the first mode, since the yoke 83 is made of a magnetic material, the magnetic field is concentrated on the yoke 83, and the yoke 83 where such magnetic field concentration is generated is made of magnetic material. The magnetic part 75 is directly abutted. For this reason, compared with the case where the yoke 83 made of a magnetic material and the magnetic part 75 made of a magnetic material are not in direct contact with each other, a strong magnetic force can be applied to the magnetic portion 75 of the shade 70, thereby making the shade 70 stronger. Can be held and positioned.
　第１の態様としての本実施形態では、磁性部７５は、当接部７７と一対の誘導部７８とを有する。当接部７７は、磁性体から成りヨーク８３における一対の側壁部８４に当接される。一対の誘導部７８は、磁性体から成り当接部７７とヨーク８３とが最も離間した状態において当接部７７よりもヨーク８３側に突出し、ヨーク８３に非接触とされている。一対の誘導部７８はヨーク８３に非接触とされるため、当接部７７とヨーク８３とを適切に当接させることができる。また、当接部７７とヨーク８３とが最も離間した状態において一対の誘導部７８は当接部７７よりもヨーク８３側に突出するため、磁性体から成る一対の誘導部７８の先端部は磁性体から成る当接部７７よりもヨーク８３側に位置している。このため、このような状態では当接部７７よりも一対の誘導部７８により強い磁力が作用し得る。このため、このような誘導部７８を有さない場合と比べて、磁性部７５とヨーク８３とが最も離間した状態においてより強い磁力を磁性部７５に作用させ得る。従って、電磁石８０を小型化し得る。 In the present embodiment as the first aspect, the magnetic part 75 includes a contact part 77 and a pair of guide parts 78. The contact portion 77 is made of a magnetic material and is in contact with a pair of side wall portions 84 in the yoke 83. The pair of guide portions 78 is made of a magnetic material and protrudes closer to the yoke 83 than the contact portion 77 when the contact portion 77 and the yoke 83 are farthest apart from each other, and is not in contact with the yoke 83. Since the pair of guide portions 78 are not in contact with the yoke 83, the contact portion 77 and the yoke 83 can be brought into contact with each other appropriately. In addition, in a state where the contact portion 77 and the yoke 83 are farthest apart, the pair of guide portions 78 protrudes closer to the yoke 83 than the contact portion 77. Therefore, the distal ends of the pair of guide portions 78 made of a magnetic material are magnetic. It is located on the yoke 83 side with respect to the contact portion 77 made of a body. For this reason, in such a state, a stronger magnetic force can act on the pair of guide portions 78 than on the contact portions 77. Therefore, a stronger magnetic force can be applied to the magnetic part 75 in a state where the magnetic part 75 and the yoke 83 are farthest apart compared to the case where the guide part 78 is not provided. Therefore, the electromagnet 80 can be reduced in size.
　第１の態様としての本実施形態では、光源ユニット３は、付勢部材であるトーションスプリング２６を備える。シェード７０は、回動可能とされ、トーションスプリング２６は、磁性部７５がヨーク８３から離間するように回動する方向に向けてシェード７０を付勢する。シェード７０の重心は、当該シェード７０の回動軸上に位置する。第１の態様としての本実施形態の光源ユニット３では、電磁石８０の磁力がトーションスプリング２６の付勢力に抗することでシェード７０が回動され、磁性部７５がヨーク８３に当接される。また、電磁石８０を非通電状態にすることで、トーションスプリング２６の付勢力によって磁性部７５がヨーク８３から離間するようにシェード７０が回動され、シェード７０を所定の回動位置に保持し得る。このように、第１の態様としての本実施形態の光源ユニット３では、電磁石８０の通電と非通電とを切り替えることによって、配光を切り替えることができる。また、上記のように、シェード７０の重心は当該シェード７０の回動軸上に位置しているため、シェード７０の重心が当該シェード７０の回動軸上に位置していない場合と比べて、小さな付勢力でシェード７０を回動し得るとともに、小さな磁力でシェード７０を回動し得る。従って、電磁石８０を小型化し得る。 In the present embodiment as the first aspect, the light source unit 3 includes a torsion spring 26 that is an urging member. The shade 70 is rotatable, and the torsion spring 26 urges the shade 70 in a direction in which the magnetic part 75 is rotated so as to be separated from the yoke 83. The center of gravity of the shade 70 is located on the rotation axis of the shade 70. In the light source unit 3 of the present embodiment as the first mode, the shade 70 is rotated by the magnetic force of the electromagnet 80 resisting the biasing force of the torsion spring 26, and the magnetic part 75 is brought into contact with the yoke 83. Further, by turning off the electromagnet 80, the shade 70 is rotated so that the magnetic portion 75 is separated from the yoke 83 by the urging force of the torsion spring 26, and the shade 70 can be held at a predetermined rotation position. . Thus, in the light source unit 3 of the present embodiment as the first mode, the light distribution can be switched by switching between energization and non-energization of the electromagnet 80. Further, as described above, since the center of gravity of the shade 70 is located on the rotation axis of the shade 70, compared to the case where the center of gravity of the shade 70 is not located on the rotation axis of the shade 70, The shade 70 can be rotated with a small biasing force, and the shade 70 can be rotated with a small magnetic force. Therefore, the electromagnet 80 can be reduced in size.
　第１の態様としての本実施形態では、磁性部７５とヨーク８３とは、互いに当接する当接面７７ｓ，８４ｓをそれぞれ有する。このため、磁性部７５とヨーク８３とが面接触するため、面接触しない場合と比べて、シェード７０をより安定して保持できる。 In the present embodiment as the first aspect, the magnetic part 75 and the yoke 83 have contact surfaces 77s and 84s that contact each other. For this reason, since the magnetic part 75 and the yoke 83 are in surface contact, the shade 70 can be held more stably than in the case of no surface contact.
　ところで、上記特許文献２に記載の光源ユニットのように、配光パターンを変化させるためにシェードを回動させる場合、当該シェードを回動させるアクチュエータを備えるため、光源ユニットが大型化する懸念がある。このため、このようなアクチュエータを備える場合であっても、光源ユニットが大型化することを抑制したいとの要請がある。 By the way, like the light source unit of the said patent document 2, when rotating a shade in order to change a light distribution pattern, since the actuator which rotates the said shade is provided, there exists a possibility that a light source unit may enlarge. . For this reason, even if it is a case provided with such an actuator, there exists a request | requirement of suppressing that a light source unit enlarges.
　そこで、第２の態様としての本実施形態の光源ユニット３は、ベースプレート２０と、光源３０と、シェード７０と、投影レンズ６０と、電磁石８０とを備える。光源３０は、ベースプレート２０を基準とした一方側に配置される。シェード７０は、ベースプレート２０に所定の方向に移動可能に支持され光源３０から出射する光の一部を遮る。投影レンズ６０は、ベースプレート２０よりも光源３０側と反対側に配置される。シェード７０は、電磁石８０の磁力を用いて移動され、電磁石８０のコア８１の両端の中心８１ａｃ，８１ｂｃは、ベースプレート２０よりも光源３０側に位置している。 Therefore, the light source unit 3 of the present embodiment as the second aspect includes a base plate 20, a light source 30, a shade 70, a projection lens 60, and an electromagnet 80. The light source 30 is disposed on one side with respect to the base plate 20. The shade 70 is supported by the base plate 20 so as to be movable in a predetermined direction, and blocks a part of the light emitted from the light source 30. The projection lens 60 is disposed on the opposite side of the light source 30 from the base plate 20. The shade 70 is moved using the magnetic force of the electromagnet 80, and the centers 81ac and 81bc at both ends of the core 81 of the electromagnet 80 are located closer to the light source 30 than the base plate 20.
　第２の態様としての本実施形態の光源ユニット３では、上記のように、シェード７０は所定の方向に移動可能であり、電磁石８０の磁力を用いて移動される。このシェード７０は光源３０から出射する光の一部を遮るため、シェード７０が移動されることによってシェード７０による遮光範囲が変化し得る。このため、第２の態様としての本実施形態の光源ユニット３は、投影レンズ６０から出射する光の配光パターンを変化させ得る。また、上記のように、電磁石８０のコア８１の両端の中心８１ａｃ，８１ｂｃは、ベースプレート２０における投影レンズ６０側の面よりも光源３０側に位置する。このため、上記特許文献２に記載の光源ユニットのように電磁石８０のコア８１全体が投影レンズ６０とベースプレート２０との間に位置する場合と比べて、電磁石８０におけるベースプレート２０よりも投影レンズ６０側に突出する部分の突出量を小さくし得る。このため、投影レンズ６０をベースプレート２０に近づけることができ、小型化し得る。また、投影レンズ６０をベースプレート２０に近づけることで、投影レンズ６０における後方焦点は光源３０に近づく。このように投影レンズ６０をベースプレート２０に近づけた際に光源３０に対する投影レンズ６０における後方焦点の位置が光源３０に近づかないようにするためには、投影レンズ６０の焦点距離を短くする必要がある。投影レンズ６０の焦点距離を短くする場合、投影レンズ６０の入射面６２及び出射面６３の少なくとも一方の曲率半径が小さくなるため、投影レンズ６０の外径を小さくし得る。従って、光源ユニット３を小型化し得る。 In the light source unit 3 of the present embodiment as the second aspect, the shade 70 is movable in a predetermined direction as described above, and is moved using the magnetic force of the electromagnet 80. Since the shade 70 blocks part of the light emitted from the light source 30, the light shielding range by the shade 70 can be changed by moving the shade 70. For this reason, the light source unit 3 of the present embodiment as the second aspect can change the light distribution pattern of the light emitted from the projection lens 60. Further, as described above, the centers 81ac and 81bc at both ends of the core 81 of the electromagnet 80 are located closer to the light source 30 than the surface of the base plate 20 on the projection lens 60 side. For this reason, compared with the case where the entire core 81 of the electromagnet 80 is located between the projection lens 60 and the base plate 20 as in the light source unit described in Patent Document 2, the projection lens 60 side of the electromagnet 80 is closer to the projection lens 60. The amount of protrusion of the portion protruding to can be reduced. For this reason, the projection lens 60 can be brought close to the base plate 20 and can be miniaturized. Further, by bringing the projection lens 60 closer to the base plate 20, the rear focal point of the projection lens 60 approaches the light source 30. As described above, when the projection lens 60 is brought close to the base plate 20, the focal length of the projection lens 60 needs to be shortened so that the position of the rear focal point of the projection lens 60 relative to the light source 30 does not approach the light source 30. . When the focal length of the projection lens 60 is shortened, the radius of curvature of at least one of the entrance surface 62 and the exit surface 63 of the projection lens 60 becomes small, so the outer diameter of the projection lens 60 can be made small. Therefore, the light source unit 3 can be reduced in size.
　第２の態様としての本実施形態では、電磁石８０は、コア８１の延在方向がベースプレート２０の面方向と平行となるように配置される。電磁石は、一般的にコアの延在方向に長尺となる傾向がある。第２の態様としての本実施形態の光源ユニット３では、上記のように、電磁石８０はコア８１の延在方向がベースプレート２０の面方向と平行となるように配置されている。このため、コア８１の延在方向がベースプレート２０の面方向に対して傾くように電磁石８０が配置されている場合と比べて、電磁石８０におけるベースプレート２０よりも投影レンズ６０側に突出する部分の突出量を小さくし得る。このため、投影レンズ６０をベースプレート２０により近づけることができる。 In the present embodiment as the second aspect, the electromagnet 80 is arranged so that the extending direction of the core 81 is parallel to the surface direction of the base plate 20. Electromagnets generally tend to be elongated in the direction in which the core extends. In the light source unit 3 of the present embodiment as the second aspect, as described above, the electromagnet 80 is disposed so that the extending direction of the core 81 is parallel to the surface direction of the base plate 20. For this reason, compared with the case where the electromagnet 80 is arranged so that the extending direction of the core 81 is inclined with respect to the surface direction of the base plate 20, the protrusion of the portion of the electromagnet 80 that protrudes closer to the projection lens 60 than the base plate 20. The amount can be reduced. For this reason, the projection lens 60 can be brought closer to the base plate 20.
　第２の態様としての本実施形態では、光源ユニット３は、付勢部材であるトーションスプリング２６を備える。シェード７０は、回動可能とされるとともに電磁石８０の磁力を用いて所定の方向に回動される。トーションスプリング２６は、電磁石８０の磁力を用いて回動される方向と反対方向に向けてシェード７０を付勢する。シェード７０の重心は、当該シェード７０の回動軸上に位置する。第２の態様としての本実施形態の光源ユニット３では、電磁石８０の磁力を用いてシェードを回動させる際にシェード７０に加わる力がトーションスプリング２６の付勢力に抗することでシェード７０が所定の方向に回動され、シェード７０を所定の回動位置に保持し得る。また、電磁石８０を非通電状態にすることで、トーションスプリング２６の付勢力によってシェード７０が所定の方向と反対方向に回動され、シェード７０を別の所定の回動位置に保持し得る。このように、第２の態様としての本実施形態の光源ユニット３では、電磁石８０の通電と非通電とを切り替えることによって、配光を切り替えることができる。また、上記のように、シェード７０の重心は当該シェード７０の回動軸上に位置しているため、シェード７０の重心が当該シェード７０の回動軸上に位置していない場合と比べて、小さな付勢力でシェード７０を回動し得るとともに、小さな磁力でシェード７０を回動し得る。従って、電磁石８０を小型化し得る。 In the present embodiment as the second aspect, the light source unit 3 includes a torsion spring 26 that is an urging member. The shade 70 is rotatable and is rotated in a predetermined direction using the magnetic force of the electromagnet 80. The torsion spring 26 urges the shade 70 in the direction opposite to the direction in which the torsion spring 26 is rotated using the magnetic force of the electromagnet 80. The center of gravity of the shade 70 is located on the rotation axis of the shade 70. In the light source unit 3 of the present embodiment as the second aspect, the force applied to the shade 70 when the shade 70 is rotated using the magnetic force of the electromagnet 80 resists the biasing force of the torsion spring 26 so that the shade 70 is predetermined. The shade 70 can be held in a predetermined rotational position. Further, by making the electromagnet 80 in a non-energized state, the shade 70 can be rotated in the direction opposite to the predetermined direction by the urging force of the torsion spring 26, and the shade 70 can be held at another predetermined rotation position. As described above, in the light source unit 3 of the present embodiment as the second mode, the light distribution can be switched by switching between energization and non-energization of the electromagnet 80. Further, as described above, since the center of gravity of the shade 70 is located on the rotation axis of the shade 70, compared to the case where the center of gravity of the shade 70 is not located on the rotation axis of the shade 70, The shade 70 can be rotated with a small biasing force, and the shade 70 can be rotated with a small magnetic force. Therefore, the electromagnet 80 can be reduced in size.
　第２の態様としての本実施形態では、シェード７０は、磁性体から成る磁性部７５を有する。第２の態様としての本実施形態の光源ユニット３では、電磁石８０を通電状態にすることでシェード７０における磁性体から成る磁性部７５に電磁石８０の磁力を作用させてシェード７０を所定の方向に移動させ得る。このため、電磁石８０の磁力によって生じる力をシェード７０に伝達するリンク部材を用いなくてもシェード７０を移動させ得る。このため、上記特許文献２に記載の光源ユニットと比べて、部品点数が増加することを抑制し得る。 In the present embodiment as the second aspect, the shade 70 has a magnetic part 75 made of a magnetic material. In the light source unit 3 of the present embodiment as the second mode, the magnetic force of the electromagnet 80 is applied to the magnetic part 75 made of a magnetic material in the shade 70 by energizing the electromagnet 80 to move the shade 70 in a predetermined direction. Can be moved. For this reason, the shade 70 can be moved without using a link member that transmits the force generated by the magnetic force of the electromagnet 80 to the shade 70. For this reason, it can suppress that a number of parts increases compared with the light source unit of the above-mentioned patent documents 2.
　第２の態様としての本実施形態では、シェード７０はベースプレート２０と投影レンズ６０との間において所定の方向に移動する反射部７２を有する。反射部７２は、光源３０から出射する光のうち投影レンズ６０の入射面６２に向かう光とは異なる光の一部を反射して投影レンズ６０の入射面６２に入射させる。第２の態様としての本実施形態の光源ユニット３では、上記のように、反射部７２は、光源３０から出射する光のうち投影レンズ６０の入射面６２に向かう光とは異なる光の一部を反射して投影レンズ６０の入射面６２に入射させる。また、反射部７２はシェード７０の一部とされて所定の方向に移動する。このため、シェード７０を移動させることによってシェード７０による遮光範囲が変化するとともに、反射部７２で反射して投影レンズ６０に入射する光の量やこの光が投影レンズ６０に入射する位置を変化させ得る。このため、第２の態様としての本実施形態の光源ユニット３は、シェード７０が反射部７２を有さない場合と比べて、形成し得る配光パターンの自由度を向上させることができる。また、上記のように、電磁石８０のコア８１の両端の中心８１ａｃ，８１ｂｃは、ベースプレート２０よりも光源３０側に位置するため、電磁石８０のコア８１全体が投影レンズ６０とベースプレート２０との間に位置する場合と比べて、投影レンズ６０と電磁石８０との間に大きな空間を形成し得る。このため、第２の態様としての本実施形態の光源ユニット３は、反射部７２を大きくすることができ、光源３０から出射する光の利用効率を向上させ得る。 In the present embodiment as the second aspect, the shade 70 has a reflecting portion 72 that moves in a predetermined direction between the base plate 20 and the projection lens 60. The reflection unit 72 reflects a part of the light emitted from the light source 30 that is different from the light directed to the incident surface 62 of the projection lens 60 and causes the light to enter the incident surface 62 of the projection lens 60. In the light source unit 3 of the present embodiment as the second aspect, as described above, the reflecting unit 72 is a part of light that is different from the light emitted from the light source 30 toward the incident surface 62 of the projection lens 60. Is reflected and made incident on the incident surface 62 of the projection lens 60. The reflecting portion 72 is a part of the shade 70 and moves in a predetermined direction. Therefore, by moving the shade 70, the light shielding range by the shade 70 is changed, and the amount of light reflected by the reflecting portion 72 and incident on the projection lens 60 and the position where this light enters the projection lens 60 are changed. obtain. For this reason, the light source unit 3 of the present embodiment as the second aspect can improve the degree of freedom of the light distribution pattern that can be formed, as compared with the case where the shade 70 does not have the reflecting portion 72. Further, as described above, since the centers 81ac and 81bc at both ends of the core 81 of the electromagnet 80 are located closer to the light source 30 than the base plate 20, the entire core 81 of the electromagnet 80 is located between the projection lens 60 and the base plate 20. Compared with the case where it is located, a large space can be formed between the projection lens 60 and the electromagnet 80. For this reason, the light source unit 3 of the present embodiment as the second aspect can enlarge the reflecting portion 72 and can improve the utilization efficiency of the light emitted from the light source 30.
　第２の態様としての本実施形態では、上記のように、シェード７０は、磁性体から成る磁性部７５を有する。また、電磁石８０は、磁性体から成る位置決め部材であるヨーク８３を有する。電磁石の磁力は電磁石の磁性体を含む部材、例えばコアやヨーク等から離れると弱くなる傾向にある。第２の態様としての本実施形態の光源ユニット３では、電磁石８０の磁力によってシェード７０の磁性部７５が電磁石８０における磁性体を含むヨーク８３に当接される。このため、シェード７０の磁性部７５が電磁石８０における磁性体を含む部材に当接しない場合と比べて、シェード７０の磁性部７５には強い磁力が作用し、シェード７０をより強固に保持して位置決めできる。このため、光源ユニット３が振動する場合であっても、電磁石８０に対するシェード７０の位置がずれることを抑制でき、意図しない配光パターンの変化を抑制し得る。 In the present embodiment as the second aspect, as described above, the shade 70 has the magnetic part 75 made of a magnetic material. The electromagnet 80 includes a yoke 83 that is a positioning member made of a magnetic material. The magnetic force of the electromagnet tends to become weaker when it is separated from a member including the magnetic body of the electromagnet, such as a core or a yoke. In the light source unit 3 of the present embodiment as the second mode, the magnetic part 75 of the shade 70 is brought into contact with the yoke 83 including the magnetic body in the electromagnet 80 by the magnetic force of the electromagnet 80. For this reason, compared with the case where the magnetic part 75 of the shade 70 does not contact the member including the magnetic body in the electromagnet 80, a strong magnetic force acts on the magnetic part 75 of the shade 70 to hold the shade 70 more firmly. Can be positioned. For this reason, even if it is a case where the light source unit 3 vibrates, it can suppress that the position of the shade 70 with respect to the electromagnet 80 shifts | deviates, and can suppress the change of the light distribution pattern which is not intended.
　第２の態様としての本実施形態では、シェード７０の磁性体から成る磁性部７５が磁性体から成るヨーク８３に当接される。つまり、磁性部７５における磁性体がヨーク８３における磁性体に当接される。ここで、磁力を生じる部材と磁性体から成る部材とが離間していたり、これらの部材間に非磁性体が介在していたりする場合、これらの部材間において磁束が拡散してしまう。しかし、磁力を生じる部材と磁性体から成る部材とが直接当接している場合、これらの部材間で磁束が拡散することが抑制され、磁性体から成る部材にはより強い磁力が作用する。第２の態様としての本実施形態の光源ユニット３では、ヨーク８３は磁性体から成るためこのヨーク８３には磁場が集中しており、このような磁場集中が生じているヨーク８３に磁性体からなる磁性部７５が直接当接する。このため、磁性体から成るヨーク８３と磁性体から成る磁性部７５とが直接当接しない場合と比べて、シェード７０の磁性部７５により強い磁力を作用させることができ、シェード７０をより強固に保持して位置決めできる。 In the present embodiment as the second aspect, the magnetic part 75 made of a magnetic material of the shade 70 is brought into contact with the yoke 83 made of a magnetic material. That is, the magnetic body in the magnetic part 75 is brought into contact with the magnetic body in the yoke 83. Here, when a member that generates a magnetic force is separated from a member made of a magnetic material, or a non-magnetic material is interposed between these members, the magnetic flux is diffused between these members. However, when a member that generates magnetic force and a member made of a magnetic material are in direct contact with each other, diffusion of magnetic flux between these members is suppressed, and a stronger magnetic force acts on the member made of a magnetic material. In the light source unit 3 of the present embodiment as the second mode, since the yoke 83 is made of a magnetic material, the magnetic field is concentrated on the yoke 83, and the yoke 83 where such magnetic field concentration is generated is made of the magnetic material. The magnetic part 75 is directly abutted. For this reason, compared with the case where the yoke 83 made of a magnetic material and the magnetic part 75 made of a magnetic material are not in direct contact with each other, a strong magnetic force can be applied to the magnetic portion 75 of the shade 70, thereby making the shade 70 stronger. Can be held and positioned.
　第２の態様としての本実施形態では、磁性部７５は、当接部７７と一対の誘導部７８とを有する。当接部７７は、磁性体から成りヨーク８３における一対の側壁部８４に当接される。一対の誘導部７８は、磁性体から成り当接部７７とヨーク８３とが最も離間した状態において当接部７７よりもヨーク８３側に突出し、ヨーク８３に非接触とされている。一対の誘導部７８はヨーク８３に非接触とされるため、当接部７７とヨーク８３とを適切に当接させることができる。また、当接部７７とヨーク８３とが最も離間した状態において一対の誘導部７８は当接部７７よりもヨーク８３側に突出するため、磁性体から成る一対の誘導部７８の先端部は磁性体から成る当接部７７よりもヨーク８３側に位置している。このため、このような状態では当接部７７よりも一対の誘導部７８により強い磁力が作用し得る。このため、このような誘導部７８を有さない場合と比べて、磁性部７５とヨーク８３とが最も離間した状態においてより強い磁力を磁性部７５に作用させ得る。従って、電磁石８０を小型化し得る。 In the present embodiment as the second aspect, the magnetic part 75 includes a contact part 77 and a pair of guide parts 78. The contact portion 77 is made of a magnetic material and is in contact with a pair of side wall portions 84 in the yoke 83. The pair of guide portions 78 is made of a magnetic material and protrudes closer to the yoke 83 than the contact portion 77 when the contact portion 77 and the yoke 83 are farthest apart from each other, and is not in contact with the yoke 83. Since the pair of guide portions 78 are not in contact with the yoke 83, the contact portion 77 and the yoke 83 can be brought into contact with each other appropriately. In addition, in a state where the contact portion 77 and the yoke 83 are farthest apart, the pair of guide portions 78 protrudes closer to the yoke 83 than the contact portion 77. Therefore, the distal ends of the pair of guide portions 78 made of a magnetic material are magnetic. It is located on the yoke 83 side with respect to the contact portion 77 made of a body. For this reason, in such a state, a stronger magnetic force can act on the pair of guide portions 78 than on the contact portions 77. Therefore, a stronger magnetic force can be applied to the magnetic part 75 in a state where the magnetic part 75 and the yoke 83 are farthest apart compared to the case where the guide part 78 is not provided. Therefore, the electromagnet 80 can be reduced in size.
　第２の態様としての本実施形態では、磁性部７５とヨーク８３とは、互いに当接する当接面７７ｓ，８４ｓをそれぞれ有する。このため、磁性部７５とヨーク８３とが面接触するため、面接触しない場合と比べて、シェード７０をより安定して保持できる。 In the present embodiment as the second aspect, the magnetic part 75 and the yoke 83 have contact surfaces 77s and 84s that contact each other. For this reason, since the magnetic part 75 and the yoke 83 are in surface contact, the shade 70 can be held more stably than in the case of no surface contact.
　以上、本発明について、実施形態を例に説明したが、本発明はこれらに限定されるものではない。 As mentioned above, although this invention was demonstrated to the example for embodiment, this invention is not limited to these.
　例えば、上記実施形態では、コア８１の両端の中心８１ａｃ，８１ｂｃがベースプレート２０よりも光源３０側に位置する電磁石８０を例に説明した。しかし、上記第２の態様の光源ユニットの場合、少なくとも電磁石８０のコア８１の一端の中心がベースプレート２０よりも光源３０側に位置していれば良い。このような構成にすることで、電磁石８０のコア８１全体が投影レンズ６０とベースプレート２０との間に位置する場合と比べて、電磁石８０におけるベースプレート２０よりも投影レンズ６０側に突出する部分の突出量を小さくし得る。例えば、電磁石８０は、上記実施形態における位置からシャフト２５を中心に所定の角度回動された位置に配置されて、コア８１の端部８１ａ側の端の中心がベースプレート２０よりも光源３０側と反対側に位置していても良い。しかし、小型化の観点からコア８１の両端の中心８１ａｃ，８１ｂｃがベースプレート２０よりも光源３０側に位置することが好ましく、コア８１はベースプレート２０よりも投影レンズ６０側に非配置とされることが好ましい。 For example, in the above embodiment, the electromagnet 80 in which the centers 81ac and 81bc at both ends of the core 81 are located closer to the light source 30 than the base plate 20 has been described as an example. However, in the case of the light source unit of the second aspect, it is only necessary that at least the center of one end of the core 81 of the electromagnet 80 is located closer to the light source 30 than the base plate 20. By adopting such a configuration, compared to the case where the entire core 81 of the electromagnet 80 is located between the projection lens 60 and the base plate 20, the portion of the electromagnet 80 that protrudes closer to the projection lens 60 than the base plate 20 is projected. The amount can be reduced. For example, the electromagnet 80 is disposed at a position rotated by a predetermined angle around the shaft 25 from the position in the above embodiment, and the center of the end on the end portion 81 a side of the core 81 is closer to the light source 30 side than the base plate 20. It may be located on the opposite side. However, from the viewpoint of miniaturization, the centers 81ac and 81bc at both ends of the core 81 are preferably located closer to the light source 30 than the base plate 20, and the core 81 is not disposed closer to the projection lens 60 than the base plate 20. preferable.
　また、上記実施形態では、磁性体から成る磁性部７５を有するシェード７０及び磁性体から成る位置決め部材であるヨーク８３を例に説明した。しかし、磁性部７５及び位置決め部材であるヨーク８３は磁性体を含んでいれば良い。図９は、シェードの変形例を図６と同様に示す図である。なお、上記実施形態と同一又は同等の構成要素については、特に説明する場合を除き、同一の参照符号を付して重複する説明は省略する。 In the above embodiment, the shade 70 having the magnetic part 75 made of a magnetic material and the yoke 83 which is a positioning member made of the magnetic material have been described as examples. However, the magnetic part 75 and the yoke 83 which is a positioning member should just contain the magnetic body. FIG. 9 is a view showing a modification of the shade in the same manner as FIG. In addition, about the component which is the same as that of the said embodiment, or the equivalent except the case where it demonstrates especially, the same referential mark is attached | subjected and the overlapping description is abbreviate | omitted.
　図９に示すシェード７０は、磁性部７５が弾性体から成る弾性体層を有する点において、上記実施形態の光源ユニット３におけるシェード７０と異なる。本変形例のシェード７０における磁性部７５は、磁性体から成る当接部７７における電磁石８０側に弾性体から成る弾性体層９０を有し、この弾性体層９０が外部に露出している。弾性体として、例えばシリコンゴム、樹脂に磁性体が分散された複合材料等が挙げられる。本変形例では、コイル８２が通電状態とされると、上記実施形態と同様にして、シェード７０に作用する電磁石８０の磁力がトーションスプリング２６の付勢力に抗することによって、当該シェード７０が回動される。そして、磁性部７５における弾性体層９０がヨーク８３における一対の側壁部８４の当接面８４ｓに当接し、シェード７０は電磁石８０の磁力によってシャフト２５を軸として回動しないように保持される。つまり、電磁石８０の磁力によってシェード７０を位置決めする際に、磁性部７５が有する弾性体が位置決め部材であるヨーク８３に当接される。このため、磁性部７５とヨーク８３とが当接する際に生じる音を抑制することができる。なお、磁性部７５と位置決め部材であるヨーク８３とが当接する際に生じる音を抑制する観点において、磁性部７５に替わってヨーク８３が弾性体から成る弾性体層を有していても良い。図１０は、電磁石の変形例を図６と同様に示す図である。なお、上記実施形態と同一又は同等の構成要素については、特に説明する場合を除き、同一の参照符号を付して重複する説明は省略する。 The shade 70 shown in FIG. 9 is different from the shade 70 in the light source unit 3 of the above embodiment in that the magnetic part 75 has an elastic layer made of an elastic body. The magnetic part 75 in the shade 70 of this modification has an elastic body layer 90 made of an elastic body on the electromagnet 80 side of the contact part 77 made of a magnetic body, and the elastic body layer 90 is exposed to the outside. Examples of the elastic body include silicon rubber and a composite material in which a magnetic body is dispersed in a resin. In this modification, when the coil 82 is energized, the magnetic force of the electromagnet 80 acting on the shade 70 resists the urging force of the torsion spring 26 in the same manner as in the above embodiment, so that the shade 70 rotates. Moved. The elastic body layer 90 in the magnetic part 75 comes into contact with the contact surfaces 84 s of the pair of side wall parts 84 in the yoke 83, and the shade 70 is held so as not to rotate about the shaft 25 by the magnetic force of the electromagnet 80. That is, when the shade 70 is positioned by the magnetic force of the electromagnet 80, the elastic body of the magnetic part 75 is brought into contact with the yoke 83 that is a positioning member. For this reason, the sound produced when the magnetic part 75 and the yoke 83 contact | abut can be suppressed. Note that the yoke 83 may have an elastic layer made of an elastic body in place of the magnetic portion 75 from the viewpoint of suppressing sound generated when the magnetic portion 75 and the yoke 83 serving as a positioning member come into contact with each other. FIG. 10 is a view showing a modification of the electromagnet in the same manner as FIG. In addition, about the component which is the same as that of the said embodiment, or the equivalent except the case where it demonstrates especially, the same referential mark is attached | subjected and the overlapping description is abbreviate | omitted.
　図１０に示す電磁石８０は、ヨーク８３の一対の側壁部８４が弾性体から成る弾性体層を有する点において、上記実施形態の光源ユニット３における電磁石８０と異なる。本変形例の電磁石８０におけるヨーク８３の一対の側壁部８４は、シェード７０の当接部７７側の端部に弾性体から成る弾性体層１９０をそれぞれ有し、この弾性体層１９０が外部に露出している。弾性体として、例えばシリコンゴム、樹脂に磁性体が分散された複合材料等が挙げられる。本変形例では、コイル８２が通電状態とされると、上記実施形態と同様にして、シェード７０に作用する電磁石８０の磁力がトーションスプリング２６の付勢力に抗することによって、当該シェード７０が回動される。そして、磁性部７５における当接部７７の当接面７７ｓがヨーク８３における一対の側壁部８４の弾性体層１９０に当接し、シェード７０は電磁石８０の磁力によってシャフト２５を軸として回動しないように保持される。つまり、電磁石８０の磁力によってシェード７０を位置決めする際に、磁性部７５は位置決め部材であるヨーク８３が有する弾性体に当接される。このため、磁性部７５とヨーク８３とが当接する際に生じる音を抑制することができる。なお、上記の変形例に示されるシェード７０のように、磁性部７５が弾性体から成る弾性体層を有し、磁性部７５の弾性体がヨーク８３の弾性体に当接されても良い。 The electromagnet 80 shown in FIG. 10 differs from the electromagnet 80 in the light source unit 3 of the above embodiment in that the pair of side wall portions 84 of the yoke 83 has an elastic layer made of an elastic body. The pair of side wall portions 84 of the yoke 83 in the electromagnet 80 of the present modified example has an elastic body layer 190 made of an elastic body at the end of the shade 70 on the contact portion 77 side, and the elastic body layer 190 is exposed to the outside. Exposed. Examples of the elastic body include silicon rubber and a composite material in which a magnetic body is dispersed in a resin. In this modification, when the coil 82 is energized, the magnetic force of the electromagnet 80 acting on the shade 70 resists the urging force of the torsion spring 26 in the same manner as in the above embodiment, so that the shade 70 rotates. Moved. The contact surface 77 s of the contact portion 77 of the magnetic portion 75 contacts the elastic body layer 190 of the pair of side wall portions 84 of the yoke 83, so that the shade 70 does not rotate about the shaft 25 by the magnetic force of the electromagnet 80. Retained. That is, when the shade 70 is positioned by the magnetic force of the electromagnet 80, the magnetic portion 75 is brought into contact with the elastic body of the yoke 83 that is a positioning member. For this reason, the sound produced when the magnetic part 75 and the yoke 83 contact | abut can be suppressed. As in the shade 70 shown in the above modification, the magnetic part 75 may have an elastic layer made of an elastic body, and the elastic body of the magnetic part 75 may be in contact with the elastic body of the yoke 83.
　また、上記実施形態及び変形例では、磁性部７５と位置決め部材であるヨーク８３とは、互いに当接する当接面７７ｓ，８４ｓをそれぞれ有し、電磁石８０の磁力によって磁性部７５とヨーク８３とが面接触していた。しかし、電磁石８０の磁力によって磁性部７５が位置決め部材であるヨーク８３に当接すれば特に限定されない。しかし、シェード７０を安定して保持する観点において、電磁石８０の磁力によって磁性部７５とヨーク８３とが面接触することが好ましい。 In the above embodiment and the modification, the magnetic part 75 and the yoke 83 as the positioning member have contact surfaces 77 s and 84 s that are in contact with each other, and the magnetic part 75 and the yoke 83 are caused by the magnetic force of the electromagnet 80. There was surface contact. However, there is no particular limitation as long as the magnetic part 75 contacts the yoke 83 that is a positioning member by the magnetic force of the electromagnet 80. However, from the viewpoint of stably holding the shade 70, it is preferable that the magnetic portion 75 and the yoke 83 are in surface contact by the magnetic force of the electromagnet 80.
　また、上記実施形態及び変形例では、ヨーク８３の一対の側壁部８４における一方の端面が、磁性部７５が当接する当接面８４ｓとされた。しかし、磁性部７５が当接する当接面は、特に限定されない。図１１は、電磁石の他の変形例を示す斜視図である。 Further, in the above-described embodiment and modification, one end surface of the pair of side wall portions 84 of the yoke 83 is the contact surface 84s with which the magnetic portion 75 contacts. However, the contact surface with which the magnetic part 75 contacts is not particularly limited. FIG. 11 is a perspective view showing another modification of the electromagnet.
　図１１に示す電磁石８０は、ヨーク８３における一対の側壁部８４の磁性部７５側の端部が折り曲げられている点において、上記実施形態における電磁石８０と異なる。本変形例では、ヨーク８３における一対の側壁部８４の磁性部７５側の端部は、断面形状がＬ字形状となるようにコイル８２側と反対側に折り曲げられている。この折り曲げられた端部における磁性部７５側の面が当接面１８４ｓとされ、この当接面１８４ｓは、コイル８２によって発生する磁界の磁束線の一部を概ね垂直な方向に横切るように延在する。また、当接面１８４ｓは、上記の当接面８４ｓと同様に、シェード７０がシャフト２５を軸として回動した際に磁性部７５の当接部７７が通過する空間内に位置し、電磁石８０の磁力によって当接部７７はこの当接面１８４ｓに当接される。このような構成にすることによって、上記実施形態及び変形例のように側壁部８４の端部が折り曲げられずに側壁部８４の一方の端面が当接面８４ｓとされる場合と比べて、当接面１８４ｓの面積を大きくし得る。このため、磁性部７５と側壁部８４とが離間している状態において、磁性部７５を当接面１８４ｓが位置する側に引き付ける磁力を増加させ得る。このため、電磁石８０のコイル８２を大型化しなくてもシェード７０を電磁石８０の磁力によって安定して回動させ得る。また、コア８１やヨーク８３は、磁場集中をさせることができれば良く、例えばヨーク８３は底壁部８５を有していなくても良い。 The electromagnet 80 shown in FIG. 11 differs from the electromagnet 80 in the above embodiment in that the ends of the pair of side walls 84 of the yoke 83 on the magnetic part 75 side are bent. In this modification, the end portions on the magnetic portion 75 side of the pair of side wall portions 84 in the yoke 83 are bent to the side opposite to the coil 82 side so that the cross-sectional shape is L-shaped. A surface on the side of the magnetic part 75 at the bent end portion is a contact surface 184s, and the contact surface 184s extends so as to cross a part of the magnetic flux line of the magnetic field generated by the coil 82 in a substantially vertical direction. Exists. Similarly to the contact surface 84s, the contact surface 184s is located in a space through which the contact portion 77 of the magnetic portion 75 passes when the shade 70 rotates about the shaft 25, and the electromagnet 80. The contact portion 77 is in contact with the contact surface 184s by the magnetic force of. By adopting such a configuration, as compared with the case where the end portion of the side wall portion 84 is not bent and one end surface of the side wall portion 84 is used as the abutment surface 84s as in the above-described embodiment and the modified example. The area of the contact surface 184s can be increased. For this reason, in the state which the magnetic part 75 and the side wall part 84 are spaced apart, the magnetic force which attracts the magnetic part 75 to the side in which the contact surface 184s is located can be increased. For this reason, the shade 70 can be stably rotated by the magnetic force of the electromagnet 80 without increasing the size of the coil 82 of the electromagnet 80. The core 81 and the yoke 83 are only required to concentrate the magnetic field. For example, the yoke 83 may not have the bottom wall portion 85.
　また、上記実施形態及び変形例では、電磁石８０の磁力によって磁性部７５が位置決め部材であるヨーク８３に当接していた。しかし、上記第１の態様の光源ユニットでは、位置決め部材は、磁性体を含む部材であれば良く、ヨーク８３に限定されるものではない。例えば、電磁石８０のコア８１が位置決め部材とされ、電磁石８０の磁力によって磁性部７５がコア８１に当接しても良い。 In the above embodiment and the modification, the magnetic part 75 is in contact with the yoke 83 that is a positioning member by the magnetic force of the electromagnet 80. However, in the light source unit of the first aspect, the positioning member may be a member including a magnetic body and is not limited to the yoke 83. For example, the core 81 of the electromagnet 80 may be used as a positioning member, and the magnetic part 75 may come into contact with the core 81 by the magnetic force of the electromagnet 80.
　また、上記実施形態及び変形例では、電磁石８０は、コア８１の中心軸ＣＡがベースプレート２０よりも光源３０側において当該ベースプレート２０の面方向と平行かつ鉛直方向に延び、当該電磁石８０がシェード７０の当接部７７の下方に位置するように配置されていた。しかし、上記第１の態様の光源ユニットでは、電磁石８０の配置は特に限定されるものではない。例えば、上記第１の態様の光源ユニットでは、電磁石８０は、上記実施形態における位置からシャフト２５を中心に所定の角度回動された位置に配置されても良い。 In the embodiment and the modification, the electromagnet 80 has the center axis CA of the core 81 extending in the vertical direction parallel to the surface direction of the base plate 20 on the light source 30 side of the base plate 20. It was arrange | positioned so that it might be located under the contact part 77. FIG. However, in the light source unit of the first aspect, the arrangement of the electromagnet 80 is not particularly limited. For example, in the light source unit of the first aspect, the electromagnet 80 may be arranged at a position rotated by a predetermined angle around the shaft 25 from the position in the above embodiment.
　また、上記実施形態及び変形例では、反射部７２はシェード７０の一部とされ、当該反射部７２はベースプレート２０と投影レンズ６０との間において所定の方向に移動していた。そして、この反射部７２が光源３０から出射する光のうち投影レンズ６０の入射面６２に向かう光とは異なる光の一部を反射して投影レンズ６０の入射面６２に入射させていた。しかし、光源ユニットは、ベースプレート２０と投影レンズ６０との間においてシェード７０の移動に応じて所定の方向に移動する反射部材を備え、当該反射部材によって、光源３０から出射する光のうち投影レンズ６０の入射面６２に向かう光とは異なる光の一部を反射して投影レンズ６０の入射面６２に入射させても良い。つまり、シェード７０と反射部７２とを別体にしても良い。このような構成とされても、反射部材を備えない場合と比べて、形成し得る配光パターンの自由度を向上させることができる。なお、光源ユニットは、このような反射部材を備えなくても良く、シェード７０は反射部７２を有していなくても良い。 In the above-described embodiment and modification, the reflecting portion 72 is a part of the shade 70, and the reflecting portion 72 moves in a predetermined direction between the base plate 20 and the projection lens 60. A part of the light emitted from the light source 30 by the reflecting unit 72 is different from the light directed to the incident surface 62 of the projection lens 60 and is incident on the incident surface 62 of the projection lens 60. However, the light source unit includes a reflecting member that moves in a predetermined direction according to the movement of the shade 70 between the base plate 20 and the projection lens 60, and the projection lens 60 out of the light emitted from the light source 30 by the reflecting member. A part of the light different from the light traveling toward the incident surface 62 may be reflected and incident on the incident surface 62 of the projection lens 60. That is, the shade 70 and the reflecting portion 72 may be separated. Even if it is set as such a structure, the freedom degree of the light distribution pattern which can be formed can be improved compared with the case where a reflection member is not provided. The light source unit may not include such a reflecting member, and the shade 70 may not include the reflecting portion 72.
　また、上記実施形態及び変形例では、ロービームの配光とハイビームの配光とを切り替え可能な光源ユニット３を例に説明した。しかし、光源ユニット３は配光パターンを変化させることができれば良く、配光パターンは特に限定されるものではない。また、光源ユニット３は車両用前照灯とは異なる灯具における光源ユニットとされても良い。 In the embodiment and the modification, the light source unit 3 that can switch between the low beam distribution and the high beam distribution has been described as an example. However, the light source unit 3 only needs to change the light distribution pattern, and the light distribution pattern is not particularly limited. The light source unit 3 may be a light source unit in a lamp different from the vehicle headlamp.
　また、上記実施形態及び変形例では、反射部７２を有しベースプレート２０に回動可能に支持されるシェード７０を例に説明した。しかし、上記第１の態様の光源ユニットでは、シェード７０は、磁性体を含む磁性部７５を有し光源から出射する光の一部を遮るとともに所定の方向に移動可能であれば特に限定されない。例えば、上記第１の態様の光源ユニットでは、シェードは、反射部７２を有していなくても良く、ベースプレート２０の面方向に沿って移動可能とされても良い。このような構成であっても、シェードがベースプレート２０の面方向に沿って移動することによって当該シェードによる遮光範囲が変化し、配光パターンを変化させ得る。また、上記第２の態様の光源ユニットでは、シェード７０は、ベースプレート２０に所定の方向に移動可能に支持され光源３０から出射する光の一部を遮り、電磁石８０の磁力を用いて移動されれば特に限定されない。例えば、上記第２の態様の光源ユニットでは、シェードは、ベースプレート２０の面方向に沿って移動可能とされても良い。このような構成であっても、シェードがベースプレート２０の面方向に沿って移動することによって当該シェードによる遮光範囲が変化し、配光パターンを変化させ得る。また、電磁石８０がソレノイドアクチュエータの一部とされ、このソレノイドアクチュエータからの力がリンク部材等の伝達部材を介してシェード７０に伝達され、当該シェード７０が移動されても良い。このような構成の場合には、シェード７０は、磁性体を含む磁性部７５を有さなくても良い。 In the embodiment and the modification described above, the shade 70 having the reflecting portion 72 and rotatably supported by the base plate 20 has been described as an example. However, in the light source unit of the first aspect, the shade 70 is not particularly limited as long as it has a magnetic part 75 including a magnetic body, blocks a part of light emitted from the light source, and can move in a predetermined direction. For example, in the light source unit of the first aspect, the shade may not have the reflecting portion 72 and may be movable along the surface direction of the base plate 20. Even in such a configuration, when the shade moves along the surface direction of the base plate 20, the light shielding range by the shade is changed, and the light distribution pattern can be changed. In the light source unit of the second aspect, the shade 70 is supported by the base plate 20 so as to be movable in a predetermined direction, blocks a part of the light emitted from the light source 30, and is moved using the magnetic force of the electromagnet 80. If it does not specifically limit. For example, in the light source unit of the second aspect, the shade may be movable along the surface direction of the base plate 20. Even in such a configuration, when the shade moves along the surface direction of the base plate 20, the light shielding range by the shade is changed, and the light distribution pattern can be changed. The electromagnet 80 may be a part of the solenoid actuator, and the force from the solenoid actuator may be transmitted to the shade 70 via a transmission member such as a link member, and the shade 70 may be moved. In the case of such a configuration, the shade 70 may not have the magnetic part 75 including a magnetic body.
　また、上記実施形態及び変形例では、ベースプレート２０の第２開口２２は第１開口２１に接続され、第１開口２１と第２開口２２とが互いに連通していた。しかし、第１開口２１と第２開口２２とは互いに連通していなくても良い。 In the embodiment and the modification, the second opening 22 of the base plate 20 is connected to the first opening 21, and the first opening 21 and the second opening 22 communicate with each other. However, the first opening 21 and the second opening 22 do not have to communicate with each other.
　また、上記実施形態及び変形例では、付勢部材であるトーションスプリング２６の付勢力によってシェード７０が付勢されていた。しかし、付勢部材は、上記第１の態様の光源ユニットでは、磁性部７５が位置決め部材であるヨーク８３から離間するように回動する方向に向けてシェード７０を付勢する限りにおいて特に限定されない。また、上記第２の態様の光源ユニットでは、付勢部材は、電磁石８０の磁力を用いて回動される方向と反対方向に向けてシェード７０を付勢する限りにおいて特に限定されない。例えば、付勢部材は、ゼンマイばねとされても良い。 In the embodiment and the modification described above, the shade 70 is urged by the urging force of the torsion spring 26 that is an urging member. However, the biasing member is not particularly limited in the light source unit of the first aspect as long as it biases the shade 70 in a direction in which the magnetic part 75 rotates so as to be separated from the yoke 83 that is the positioning member. . In the light source unit of the second aspect, the urging member is not particularly limited as long as the urging member urges the shade 70 in the direction opposite to the rotating direction using the magnetic force of the electromagnet 80. For example, the urging member may be a spring.
　また、上記実施形態及び変形例の光源ユニット３では、ＰＥＳ光学系が適用されたが、パラボラ光学系が適用されても良く、リフレクタを用いないで光源からの光を直接レンズに入射させる直射光学系が適用されても良い。 In the light source unit 3 of the above embodiment and the modified example, the PES optical system is applied. However, a parabolic optical system may be applied, and the direct optical that directly enters the light from the light source into the lens without using a reflector. A system may be applied.
　以上のように、本発明の第１の態様によれば、意図しない配光パターンの変化を抑制し得る光源ユニットが提供され、本発明の第２の態様によれば、小型化し得る光源ユニットが提供され、照明等の分野において利用可能である。 As described above, according to the first aspect of the present invention, a light source unit that can suppress unintended changes in the light distribution pattern is provided. According to the second aspect of the present invention, a light source unit that can be reduced in size is provided. Provided and available in fields such as lighting.
１・・・前照灯
２・・・筐体
３・・・光源ユニット
２０・・・ベースプレート
２６・・・トーションスプリング（付勢部材）
３０・・・光源
３５・・・発光制御回路
４０・・・ヒートシンク
５０・・・リフレクタ
６０・・・投影レンズ
７０・・・シェード
７１・・・本体部
７２・・・反射部
７３・・・遮光部
７５・・・磁性部
７７・・・当接部
７７ｓ・・・当接面
７８・・・誘導部
８０・・・電磁石
８１・・・コア
８１ａｃ，８１ｂｃ・・・コアの端の中心
８２・・・コイル
８３・・・ヨーク（位置決め部材）
８４ｓ，１８４ｓ・・・当接面
９０，１９０・・・弾性体層

  DESCRIPTION OF SYMBOLS 1 ... Headlamp 2 ... Housing 3 ... Light source unit 20 ... Base plate 26 ... Torsion spring (biasing member)
DESCRIPTION OF SYMBOLS 30 ... Light source 35 ... Light emission control circuit 40 ... Heat sink 50 ... Reflector 60 ... Projection lens 70 ... Shade 71 ... Main-body part 72 ... Reflection part 73 ... Light-shielding Part 75 ... magnetic part 77 ... contact part 77 s ... contact surface 78 ... induction part 80 ... electromagnet 81 ... core 81ac, 81bc ... center 82 of the end of the core ..Coil 83 ... Yoke (positioning member)
84s, 184s ... contact surface 90, 190 ... elastic layer

Claims (13)

  1. 　光源と、
    　磁性体を含む磁性部を有し前記光源から出射する光の一部を遮るとともに所定の方向に移動可能とされるシェードと、
    　磁性体を含む位置決め部材を有する電磁石と、
    を備え、
    　前記電磁石の磁力によって前記シェードの前記磁性部が前記電磁石の前記位置決め部材に当接される
    ことを特徴とする光源ユニット。     A light source;
    A shade having a magnetic part including a magnetic body and blocking a part of the light emitted from the light source and movable in a predetermined direction;
    An electromagnet having a positioning member including a magnetic body;
    With
    The light source unit, wherein the magnetic part of the shade is brought into contact with the positioning member of the electromagnet by the magnetic force of the electromagnet.
  2. 　前記位置決め部材は弾性体を有し、
    　前記磁性部は前記弾性体に当接される
    ことを特徴とする請求項１に記載の光源ユニット。     The positioning member has an elastic body,
    The light source unit according to claim 1, wherein the magnetic part is in contact with the elastic body.
  3. 　前記磁性部は弾性体を有し、前記弾性体が前記位置決め部材に当接される
    ことを特徴とする請求項１に記載の光源ユニット。     The light source unit according to claim 1, wherein the magnetic unit includes an elastic body, and the elastic body is in contact with the positioning member.
  4. 　前記磁性部における前記磁性体が前記位置決め部材における前記磁性体に当接される
    ことを特徴とする請求項１に記載の光源ユニット。     The light source unit according to claim 1, wherein the magnetic body in the magnetic portion is in contact with the magnetic body in the positioning member.
  5. 　前記磁性部は、当該磁性部における前記磁性体を含み前記位置決め部材に当接される当接部と、当該磁性部における前記磁性体を含み前記当接部と前記位置決め部材とが最も離間した状態において前記当接部よりも前記位置決め部材側に突出する誘導部とを有し、
    　前記誘導部は、前記位置決め部材に非接触とされる
    ことを特徴とする請求項１から４のいずれか１項に記載の光源ユニット。     The magnetic part is a state in which the contact part including the magnetic body in the magnetic part and contacting the positioning member, and the contact part including the magnetic body in the magnetic part and the positioning member are most separated from each other. And a guide portion that protrudes to the positioning member side from the contact portion,
    5. The light source unit according to claim 1, wherein the guide portion is not in contact with the positioning member. 6.
  6. 　付勢部材を更に備え、
    　前記シェードは、回動可能とされ、
    　前記付勢部材は、前記磁性部が前記位置決め部材から離間するように回動する方向に向けて前記シェードを付勢し、
    　前記シェードの重心は、当該シェードの回動軸上に位置する
    ことを特徴とする請求項１から５のいずれか１項に記載の光源ユニット。     A biasing member;
    The shade is rotatable,
    The biasing member biases the shade toward a direction in which the magnetic part rotates so as to be separated from the positioning member,
    The light source unit according to claim 1, wherein a center of gravity of the shade is located on a rotation axis of the shade.
  7. 　前記磁性部と前記位置決め部材は、互いに当接する当接面をそれぞれ有する
    ことを特徴とする請求項１から６のいずれか１項に記載の光源ユニット。     The light source unit according to claim 1, wherein the magnetic part and the positioning member have contact surfaces that contact each other.
  8. 　前記位置決め部材は、前記電磁石のコイルの外側で当該コイルの延在方向に沿って延在し、
    　前記位置決め部材における前記磁性部側の端部は、断面形状がＬ字形状となるように前記コイル側と反対側に折り曲げられ、
    　前記端部における前記磁性部側の面が前記当接面とされる
    ことを特徴とする請求項７に記載の光源ユニット。     The positioning member extends along the extending direction of the coil on the outside of the coil of the electromagnet,
    The end on the magnetic part side of the positioning member is bent to the side opposite to the coil side so that the cross-sectional shape is L-shaped,
    The light source unit according to claim 7, wherein a surface of the end portion on the magnetic portion side is the contact surface.
  9. 　ベースプレートと、
    　前記ベースプレートを基準とした一方側に配置される光源と、
    　前記ベースプレートに所定の方向に移動可能に支持され前記光源から出射する光の一部を遮るシェードと、
    　前記ベースプレートよりも前記光源側と反対側に配置される投影レンズと、
    　電磁石と、
    を備え、
    　前記シェードは、前記電磁石の磁力を用いて移動され、
    　少なくとも前記電磁石のコアの一端の中心は、前記ベースプレートよりも前記光源側に位置する
    ことを特徴とする光源ユニット。     A base plate;
    A light source disposed on one side with respect to the base plate;
    A shade that is supported by the base plate so as to be movable in a predetermined direction and blocks a part of light emitted from the light source;
    A projection lens disposed on the opposite side of the light source from the base plate;
    An electromagnet,
    With
    The shade is moved using the magnetic force of the electromagnet,
    At least the center of one end of the core of the electromagnet is located closer to the light source than the base plate.
  10. 　前記電磁石は、前記コアの延在方向が前記ベースプレートの面方向と平行となるように配置される
    ことを特徴とする請求項９に記載の光源ユニット。     The light source unit according to claim 9, wherein the electromagnet is disposed so that an extending direction of the core is parallel to a surface direction of the base plate.
  11. 　付勢部材を更に備え、
    　前記シェードは、回動可能とされるとともに前記電磁石の磁力を用いて所定の方向に回動され、
    　前記付勢部材は、前記電磁石の磁力を用いて回動される方向と反対方向に向けて前記シェードを付勢し、
    　前記シェードの重心は、当該シェードの回動軸上に位置する
    ことを特徴とする請求項９または１０に記載の光源ユニット。     A biasing member;
    The shade is rotatable and rotated in a predetermined direction using the magnetic force of the electromagnet,
    The biasing member biases the shade in a direction opposite to a direction rotated using the magnetic force of the electromagnet,
    The light source unit according to claim 9 or 10, wherein a center of gravity of the shade is located on a rotation axis of the shade.
  12. 　前記シェードは、磁性体を含む磁性部を有する
    ことを特徴とする請求項９から１１のいずれか１項に記載の光源ユニット。     The light source unit according to claim 9, wherein the shade includes a magnetic portion including a magnetic body.
  13. 　前記ベースプレートと前記投影レンズとの間において前記シェードとともに所定の方向に移動する反射部材を更に備え、
    　前記反射部材は、前記光源から出射する光のうち前記投影レンズの前記ベースプレート側の面に向かう光とは異なる光の一部を反射して前記投影レンズの前記ベースプレート側の面に入射させる
    ことを特徴とする請求項９から１２のいずれか１項に記載の光源ユニット。
     

          A reflection member that moves in a predetermined direction together with the shade between the base plate and the projection lens;
    The reflecting member reflects a part of the light emitted from the light source, which is different from the light directed to the base plate side surface of the projection lens, and enters the surface of the projection lens on the base plate side surface. The light source unit according to claim 9, wherein the light source unit is a light source unit.


PCT/JP2019/020937 2018-05-31 2019-05-27 Light source unit WO2019230663A1 (en)

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0290503A (en) * 1988-09-27 1990-03-30 Matsushita Electric Works Ltd Polarized electromagnet
JPH02170508A (en) * 1988-12-23 1990-07-02 Matsushita Electric Works Ltd Polarized electromagnet device
JPH0833303A (en) * 1994-07-07 1996-02-02 Keihin Seiki Mfg Co Ltd Electromagnetic apparatus
JP2006202694A (en) * 2005-01-24 2006-08-03 Koito Mfg Co Ltd Vehicular headlamp
JP2012018862A (en) * 2010-07-09 2012-01-26 Koito Mfg Co Ltd Headlight for vehicle
JP2012054150A (en) * 2010-09-02 2012-03-15 Stanley Electric Co Ltd Vehicular headlight
JP2017130456A (en) * 2016-01-20 2017-07-27 アムエル システムズ Shut-off mechanism for motor vehicle headlight actuated by electromagnet with two air gaps
JP2018049730A (en) * 2016-09-21 2018-03-29 株式会社小糸製作所 Vehicular headlight

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0290503A (en) * 1988-09-27 1990-03-30 Matsushita Electric Works Ltd Polarized electromagnet
JPH02170508A (en) * 1988-12-23 1990-07-02 Matsushita Electric Works Ltd Polarized electromagnet device
JPH0833303A (en) * 1994-07-07 1996-02-02 Keihin Seiki Mfg Co Ltd Electromagnetic apparatus
JP2006202694A (en) * 2005-01-24 2006-08-03 Koito Mfg Co Ltd Vehicular headlamp
JP2012018862A (en) * 2010-07-09 2012-01-26 Koito Mfg Co Ltd Headlight for vehicle
JP2012054150A (en) * 2010-09-02 2012-03-15 Stanley Electric Co Ltd Vehicular headlight
JP2017130456A (en) * 2016-01-20 2017-07-27 アムエル システムズ Shut-off mechanism for motor vehicle headlight actuated by electromagnet with two air gaps
JP2018049730A (en) * 2016-09-21 2018-03-29 株式会社小糸製作所 Vehicular headlight

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