WO2023157944A1 - Vehicle lamp - Google Patents

Vehicle lamp Download PDF

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Publication number
WO2023157944A1
WO2023157944A1 PCT/JP2023/005671 JP2023005671W WO2023157944A1 WO 2023157944 A1 WO2023157944 A1 WO 2023157944A1 JP 2023005671 W JP2023005671 W JP 2023005671W WO 2023157944 A1 WO2023157944 A1 WO 2023157944A1
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WO
WIPO (PCT)
Prior art keywords
light
lamp
incident
control elements
light source
Prior art date
Application number
PCT/JP2023/005671
Other languages
French (fr)
Japanese (ja)
Inventor
泰晃 渡邊
一真 長瀬
幸司 岩下
Original Assignee
株式会社小糸製作所
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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
Publication of WO2023157944A1 publication Critical patent/WO2023157944A1/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
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/10—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
    • F21S43/13—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source characterised by the type of light source
    • F21S43/14—Light emitting diodes [LED]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—Light guides
    • F21S43/236—Light guides characterised by the shape of the light guide
    • F21S43/241—Light guides characterised by the shape of the light guide of complex shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—Light guides
    • F21S43/242—Light guides characterised by the emission area
    • F21S43/243—Light guides characterised by the emission area emitting light from one or more of its extremities
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2103/00—Exterior vehicle lighting devices for signalling purposes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2103/00—Exterior vehicle lighting devices for signalling purposes
    • F21W2103/10—Position lights
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2103/00—Exterior vehicle lighting devices for signalling purposes
    • F21W2103/20—Direction indicator lights
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the present invention relates to a vehicle lamp equipped with a light guide.
  • Patent Document 1 as a configuration of such a vehicle lamp, a plurality of incidence control elements for controlling the incidence of direct light from a light source are provided on the rear surface of a light guide body from the inner peripheral side to the outer peripheral side. Those formed in a state of being lined up toward the direction are described.
  • Each of the plurality of incidence control elements described in this "Patent Document 1" has an incidence surface for receiving direct light from a light source and totally reflects the light from the light source incident from this incidence surface toward the front of the lamp. and a reflective surface.
  • Patent Document 1 By adopting the configuration described in "Patent Document 1" above, it is possible to use the direct light emitted from the light source toward the front of the lamp as front illumination light over a wide range.
  • the present invention has been made in view of such circumstances, and provides a vehicle lamp configured to irradiate light emitted from a light source toward the front of the lamp via a light guide body.
  • a vehicular lamp capable of making a person's body appear to shine brightly up to its outer peripheral edge.
  • the present invention aims to achieve the above object by devising the configuration of the light guide.
  • the vehicle lamp according to the present invention is A vehicle lamp configured to emit light emitted from a light source toward the front of the lamp via a light guide,
  • the light guide has a central area located in front of the lamp of the light source and a peripheral area located around the central area,
  • the central region includes a first incident surface for direct light incident from the light source, and a first reflecting surface for totally reflecting the light from the light source incident from the first incident surface toward the peripheral region.
  • a plurality of incidence control elements for controlling the incidence of direct light from the light source are formed on the rear surface of the peripheral region in a state of being aligned from the inner peripheral side to the outer peripheral side of the peripheral region,
  • Each of the plurality of incident control elements has a second incident surface for receiving direct light from the light source, and a second reflection surface for totally reflecting the light from the light source incident from the second incident surface toward the front of the lamp. has a surface and
  • Each of the plurality of incidence control elements is arranged at a position where light from the light source totally reflected by the first reflecting surface can enter the second reflecting surface.
  • vehicle lamp is not particularly limited, and for example, tail lamps, clearance lamps, front turn signal lamps, etc. can be used.
  • the type of the above “light source” is not particularly limited, and for example, light emitting diodes, light source bulbs, etc. can be adopted.
  • a vehicle lamp according to the present invention includes a light guide.
  • This light guide has a central area and a peripheral area. are formed in a state of being aligned from the inner peripheral side to the outer peripheral side, and each of the plurality of incidence control elements has a second incident surface on which direct light from the light source is incident;
  • the light emitted from the light source toward the front of the lamp is used over a wide range as forward illuminating light because the second reflecting surface is provided to totally reflect the light from the light source incident from the second incident surface toward the front of the lamp. can do.
  • the central region of the light guide includes a first incident surface for receiving direct light from the light source, and a first reflection surface for totally reflecting the light from the light source incident from the first incident surface toward the peripheral region. and each of the plurality of incidence control elements is arranged at a position where the light from the light source totally reflected by the first reflecting surface in the central region can enter the second reflecting surface, The light from the light source that is totally reflected by the first reflecting surface in the central area can also be used as forward illumination light from the peripheral area.
  • the forward illuminating light from the peripheral region can be greatly increased, thereby allowing the lightguide to illuminate the outside of the lightguide. It is possible to make even the peripheral part appear to shine brightly.
  • the light guide shines brightly up to its outer peripheral edge. can be made visible.
  • each of the plurality of incidence control elements is further configured such that the second reflecting surface is formed of an inclined surface inclined toward the outer circumference toward the front of the lamp, and the outer circumference side area is the inner side. If it is formed with a larger angle of inclination than the circumferential region, the following effects can be obtained.
  • the light from the light source totally reflected by the first reflecting surface in the central area is incident on each of the plurality of incidence control elements on the outer peripheral side area of the second reflecting surface. Since the area is formed with a larger inclination angle than the inner peripheral side area, the light from the light source, which is incident from the second incident surface of the peripheral area and then totally reflected by the inner peripheral side area of the second reflecting surface, and the central area. After being totally reflected by the first reflecting surface, the light from the light source, which is totally reflected by the outer peripheral region of the second reflecting surface, can be irradiated as light traveling in substantially the same direction close to the front direction of the lamp. . As a result, when viewed from the front of the lamp, the peripheral area of the light guide can be seen to shine brightly over its entire area.
  • each of the "inner peripheral side area” and the “outer peripheral side area” is not particularly limited, and the outer peripheral side area is formed with a larger inclination angle than the inner peripheral side area. If so, each specific inclination angle is not particularly limited.
  • the plurality of incident control elements are arranged in a state in which they are gradually displaced toward the front side of the lamp from the inner peripheral side toward the outer peripheral side of the peripheral region, then the first reflecting surface of the central region The light from the light source totally reflected at can be efficiently made incident on the second reflecting surface.
  • a plurality of emission control elements for controlling the emission of light from the light source, which is totally reflected by the second reflecting surfaces of the plurality of incidence control elements, is further provided on the front surface of the peripheral area from the inner peripheral side of the peripheral area.
  • the light guides are arranged in a row toward the outer periphery, light distribution control by the light guide can be performed with high accuracy.
  • at least the emission control elements positioned at the outer peripheral edge of the peripheral region are configured to deflect and emit the light from the light source, which is totally reflected by the second reflecting surface, toward the central region. If this is the case, even if other lamp constituent members are arranged around the light guide, the forward illumination light from the peripheral area may be inadvertently blocked by the lamp constituent members. It is possible to prevent it from being put away.
  • the light source is composed of a light-emitting element arranged with the light-emitting surface facing forward of the lamp
  • the light distribution of the light emitted from the light-emitting element is the same as that of the light-emitting surface
  • the intensity of the emitted light toward the central region of the light guide located substantially perpendicular to the surface of the light guide increases, the intensity of the emitted light toward the peripheral region of the light guide decreases significantly. It is particularly effective to employ a configuration in which the light from the light-emitting element that is totally reflected by the first reflecting surface of the region is used as forward illumination light from the peripheral region.
  • FIG. 1 is a front view showing a vehicle lamp according to an embodiment of the present invention
  • FIG. II-II line sectional view of Fig. 1 Detailed view of part III in Fig. 2
  • Fig. 3 Detailed view of V part in FIG.
  • FIG. 4 is a side cross-sectional view showing how light distribution control is performed in the peripheral region of the light guide of the vehicle lamp.
  • FIG. 6 is a view similar to FIG. 5 showing a first modification of the above embodiment;
  • FIG. 6 is a view similar to FIG. 5 showing a second modification of the above embodiment;
  • FIG. 1 is a front view showing a vehicle lamp 10 according to one embodiment of the present invention
  • FIG. 2 is a cross-sectional view taken along line II-II of FIG.
  • a vehicle lamp 10 is a front turn signal lamp that is arranged in the front part of a vehicle.
  • a light source unit 20, a light guide 30, a holder panel 40, and an extension panel 50 are incorporated in a lamp chamber formed by a transparent light-transmitting cover 14.
  • the vehicle lamp 10 is configured to irradiate the light emitted from the light source unit 20 through the light guide 30 toward the front of the lamp.
  • the light source unit 20 has a structure in which a light emitting element 22 as a light source is supported by a plug 26 via a substrate 24 .
  • the light source unit 20 is supported by the holder panel 40 through light source support holes 40 a formed in the holder panel 40 . This support is performed by inserting the front end portion of the plug 26 into the light source support hole 40 a from the rear side of the lamp and rotating it by a predetermined amount to fit it into the holder panel 40 .
  • a packing 28 is attached to the plug 26 to ensure this fitting.
  • a plurality of heat radiation fins 26a are formed on the rear portion of the plug 26. As shown in FIG.
  • the holder panel 40 is supported by the lamp body 12 at its outer peripheral edge.
  • the light emitting element 22 is an amber light emitting diode having a square light emitting surface 22a.
  • the light emitting surface 22a faces the front of the lamp (more ) is configured to be placed facing the
  • the light guide 30 is a transparent resin molded product such as acrylic (PMMA) resin or polycarbonate (PC) resin, and is configured to guide the light emitted from the light emitting element 22 .
  • the light guide 30 includes a central region 32 positioned in the front direction of the lamp with respect to the light emitting element 22, a peripheral region 34 positioned around the central region 32, and an outer peripheral wall portion positioned around the peripheral region 34. 36, and is supported by the holder panel 40 at the outer peripheral wall portion 36 thereof.
  • the central region 32 is formed around a reference axis line Ax extending in the front-rear direction of the lamp so as to pass through the light emission center of the light-emitting element 22, and has a circular outer shape when viewed from the front of the lamp.
  • the central portion of the central region 32 is configured as a transmission control portion 32A that controls transmission of direct light from the light emitting element 22, and the outer peripheral portion thereof is configured as a reflection control portion 32B that controls reflection of direct light from the light emitting element 22. It is configured.
  • the rear surface of the central region 32 is configured as a first incident surface 32a that allows direct light from the light emitting center of the light emitting element 22 to enter as light parallel to the reference axis Ax.
  • the front surface of the transmission control section 32A in the central region 32 directs the direct light from the light emitting element 22 incident from the first incident surface 32a in a direction slightly expanding with respect to the direction parallel to the reference axis Ax. It is configured as an emission surface 32Aa.
  • the first emission surface 32Aa is formed in a stepped shape with the outer peripheral portion displaced toward the front side of the lamp with respect to the central portion.
  • the front surface of the reflection control section 32B in the central region 32 is configured as a first reflecting surface 32Ba that totally reflects the direct light from the light emitting element 22 incident from the first incident surface 32a toward the peripheral region 34.
  • the first reflecting surface 32Ba is formed of a conical surface having the reference axis Ax as a central axis, and thus the incident light from the first incident surface 32a reaching the first reflecting surface 32Ba is reflected by the reference axis. The light is totally reflected radially outward with Ax as the center. At this time, the first reflecting surface 32Ba is inclined so as to totally reflect the incident light from the first incident surface 32a in a direction slightly toward the rear of the lamp with respect to the vertical plane perpendicular to the reference axis Ax. angle is set.
  • the peripheral area 34 has a horizontally long rectangular outer shape centered on the reference axis Ax when viewed from the front of the lamp.
  • a plurality of incident control elements 34S for controlling the incidence of direct light from the light emitting elements 22 are formed on the rear surface of the peripheral region 34 in a state of being aligned from the inner peripheral side to the outer peripheral side of the peripheral region 34. .
  • the plurality of incident control elements 34S are formed to extend annularly around the reference axis Ax when viewed from the front of the lamp. At that time, the plurality of incidence control elements 34S are formed with substantially the same cross-sectional shape and substantially constant width.
  • Each of the plurality of incidence control elements 34S has a second incidence surface 34S1 for receiving direct light from the light emitting element 22, and the light from the light emitting element 22 entering from the second incidence surface 34S1 is totally reflected toward the front of the lamp. and a second reflecting surface 34S2 that allows
  • each of the plurality of incidence control elements 34S is arranged at a position where the light from the light emitting element 22 totally reflected by the first reflecting surface 32Ba of the central region 32 can enter the second reflecting surface 34S2.
  • the plurality of incident control elements 34S are arranged in a state of being gradually displaced toward the front side of the lamp from the inner peripheral side of the peripheral region 34 toward the outer peripheral side.
  • the plurality of incidence control elements 34S are arranged along a conical surface that is inclined forward of the lamp by about 5 to 10° with respect to a vertical plane perpendicular to the reference axis Ax.
  • a plurality of emission control elements 34E1 and 34E2 for controlling the emission of the light from the light emitting elements 22 totally reflected by the second reflecting surfaces 34S2 of the plurality of incidence control elements 34S are provided. They are arranged in a row from the inner peripheral side to the outer peripheral side.
  • a plurality of annular regions extending concentrically around the reference axis Ax in a front view of the lamp are further divided into a plurality of fan-shaped segments in the circumferential direction at equal angles. ing.
  • the plurality of emission control elements 34E1 and 34E2 are formed at positions substantially overlapping the plurality of incidence control elements 34S when viewed from the front of the lamp. That is, the plurality of emission control elements 34E1 and 34E2 are formed with a substantially constant width in the radial direction.
  • the plurality of emission control elements 34E1 and 34E2 are configured to emit the light from the light emitting element 22, which is totally reflected by the second reflecting surface 34S2, toward the front of the lamp in a direction near the reference axis Ax.
  • the output control element 34E2 located at the outer peripheral edge of the peripheral region 34 has a larger deflected output angle toward the reference axis Ax than the output control element 34E1 located closer to the inner periphery of the peripheral region 34. , its cross-sectional shape is set.
  • Each of the plurality of emission control elements 34E1 and 34E2 is configured to emit the light from the light emitting element 22 totally reflected by the second reflecting surface 34S2 as light diffused in the circumferential direction with respect to the reference axis Ax.
  • the outer peripheral wall portion 36 of the light guide 30 is formed so as to extend from the outer peripheral edge portion of the peripheral region 34 toward the front of the lamp in a direction slightly inclined to the outer peripheral side.
  • the outer peripheral wall portion 36 is formed to extend in a horizontally long rectangular shape along the outer peripheral shape of the peripheral region 34 when viewed from the front of the lamp.
  • the extension panel 50 is formed to extend in a horizontally long rectangular shape along the front end surface of the outer peripheral wall portion 36 of the light guide 30 when viewed from the front of the lamp.
  • the extension panel 50 has a laterally long rectangular opening 50 a slightly smaller than the outer shape of the peripheral region 34 of the light guide 30 .
  • the extension panel 50 is formed so as to extend outward from the opening 50a toward the rear of the lamp, and is supported by the lamp body 12 in contact with the holder panel 40 at its rear end. .
  • Figure 3 is a detailed view of the III part of Figure 2
  • Figure 4 is a detailed view of the IV part of Figure 3.
  • the second incidence surface 34S1 is formed in a substantially conical shape as an inclined surface inclined inward toward the front of the lamp.
  • the surface 34S2 is formed in a substantially conical shape as an inclined surface inclined toward the outer circumference toward the front of the lamp.
  • a rear end portion 34Sa of each of the plurality of incidence control elements 34S has a rounded cross-sectional shape.
  • the connecting portion between the plurality of incidence control elements 34S has a pin square cross-sectional shape with little roundness.
  • the second reflecting surface 34S2 is formed with a larger inclination angle in the outer peripheral side area 34S2B than in the inner peripheral side area 34S2A.
  • the inner circumferential side area 34S2A of the second reflecting surface 34S2 is formed with a larger inclination angle than the second incident surface 34S1.
  • the outer peripheral region 34S2B of the second reflecting surface 34S2 is the light from the light emitting element 22 totally reflected by the first reflecting surface 32Ba of the central region 32 (hereinafter also simply referred to as "reflected light B"). is formed over the maximum range that can be incident on the second reflecting surface 34S2, and the other area is formed as an inner peripheral side area 34S2A.
  • Each of the plurality of incidence control elements 34S totally reflects the reflected light B from the central region 32 toward the front of the lamp in the outer region 34S2B of the second reflecting surface 34S2, and In the peripheral region 34S2A, the light from the light emitting element 22 incident from the second incident surface 34S1 (hereinafter also simply referred to as "direct light A") is totally reflected toward the front of the lamp.
  • FIG. 5A and 5B are detailed views of the V portion in FIG.
  • FIG. 5(c) is a diagram showing them at the same time.
  • the reflected light B from the central region 32 reaches the outer peripheral region 34S2B of the second reflecting surface 34S2 as substantially parallel light, and is substantially It goes to the front of the lamp as parallel light.
  • the inclination angle of the outer peripheral region 34S2B is set so that the totally reflected light from the outer peripheral region 34S2B is light directed in a direction slightly inclined inwardly with respect to the front direction of the lamp.
  • the direct light A from the light emitting element 22 reaches the second incident surface 34S1 as light that spreads slightly more than the parallel light, and then the parallel light from the second incident surface 34S1. It reaches the inner peripheral side area 34S2A of the second reflecting surface 34S2 as light that spreads slightly more than the parallel light, and even after being totally reflected by this inner peripheral side area 34S2A, it travels toward the front of the lamp as light that spreads slightly more than parallel light.
  • the inclination angle of the inner circumference side area 34S2A is set so that the total reflected light from the inner circumference side area 34S2A is light directed in a direction slightly inclined to the inner circumference side with respect to the front direction of the lamp.
  • the direct light A that has reached the rear end portion 34Sa of the incidence control element 34S enters from the second incident surface 34S1, converges once, and then reaches the inner peripheral side area 34S2A of the second reflecting surface 34S2 as diffused light. Therefore, after being totally reflected by the inner circumference side region 34S2A, the light travels forward of the lamp as diffused light.
  • the total reflected light from the entire inner peripheral side area 34S2A includes substantially parallel light directed in a direction slightly inclined to the inner peripheral side with respect to the front direction of the lamp, and It is mixed with the diffused light that spreads out.
  • the total reflected light from the entire second reflecting surface 34S2 includes light originating from the reflected light B that travels in a direction close to the front direction of the lamp from the outer peripheral side region 34S2B as substantially parallel light, and light derived from the inner light.
  • Light derived from direct light A that travels in a direction close to the front direction of the lamp as substantially parallel light and diffused light from the circumferential side area 34S2A is mixed.
  • FIG. 6 is a side cross-sectional view showing how light distribution is controlled in the peripheral region 34 of the light guide 30 with respect to the light emitted from the light emitting element 22.
  • FIG. 6(a) is a diagram showing how the light distribution is controlled with respect to the reflected light B from the central region 32
  • FIG. 6(c) is a diagram showing them at the same time.
  • the reflected light B from the central region 32 is totally reflected by the second reflecting surfaces 34S2 of the plurality of incident control elements 34S, and then is reflected slightly toward the inner periphery with respect to the front direction of the lamp. It reaches the front surface of the peripheral area 34 as substantially parallel light directed in a direction. Then, the light reaching the formation area of the emission control element 34E1 is emitted toward the front of the lamp as substantially parallel light that is slightly deflected toward the reference axis Ax by the emission control element 34E1. The light that has reached the formation area of the control element 34E2 is emitted toward the front of the lamp as substantially parallel light that is relatively largely deflected toward the reference axis Ax by the emission control element 34E2.
  • the direct light A from the light emitting element 22 is totally reflected by the second reflecting surfaces 34S2 of the plurality of incident control elements 34S, and then slightly deflected toward the reference axis Ax.
  • the light reaches the front surface of the peripheral region 34 as a mixture of approximately parallel light and diffused light.
  • the light that has reached the formation area of the emission control element 34E1 is emitted toward the front of the lamp while being slightly deflected in a direction closer to the reference axis Ax, and the light that has reached the formation area of the emission control element 34E2 is directed toward the reference axis Ax.
  • the light is emitted toward the front of the lamp while being relatively largely deflected in the near direction.
  • the total reflected light from the entire second reflecting surface 34S2 includes the light originating from the reflected light B that travels forward from the outer peripheral side area 34S2B as substantially parallel light toward the front of the lamp, and the inner peripheral side area 34S2A. light derived from the direct light A directed toward the front of the lamp as substantially parallel light and diffused light.
  • the light derived from the reflected light B is emitted toward the front of the lamp as brighter light than the light derived from the direct light A.
  • both the light derived from the reflected light B and the light derived from the direct light A are relatively greatly deflected toward the reference axis Ax when emitted from the formation area of the emission control element 34E2 toward the front of the lamp. This prevents the light emitted from the light guide 30 from being blocked by the extension panel 50 (see FIG. 3).
  • the vehicle lamp 10 includes a light guide body 30.
  • the light guide body 30 has a central region 32 and a peripheral region 34, and a rear surface of the peripheral region 34 serves as a light source.
  • a plurality of incidence control elements 34S for controlling the incidence of direct light from the light emitting element 22 are arranged in a row from the inner peripheral side to the outer peripheral side, and each of the plurality of incidence control elements 34S Equipped with a second incident surface 34S1 for receiving direct light from the light emitting element 22 and a second reflecting surface 34S2 for totally reflecting the light from the light emitting element 22 incident from the second incident surface 34S1 toward the front of the lamp. Therefore, the light emitted from the light emitting element 22 toward the front of the lamp can be used over a wide range as forward illumination light.
  • the central region 32 of the light guide 30 has a first incident surface 32a on which direct light from the light emitting element 22 is incident, and a peripheral region 34 on which the light from the light emitting element 22 incident from the first incident surface 32a is received.
  • Each of the plurality of incident control elements 34S is provided with a first reflecting surface 32Ba that is totally reflected toward the center region 32, and each of the plurality of incident control elements 34S receives light from the light emitting element 22 that is totally reflected by the first reflecting surface 32Ba of the central region 32.
  • the light from the light emitting element 22 that is totally reflected by the first reflecting surface 32Ba of the central region 32 is also used as forward irradiation light from the peripheral region 34. can do.
  • the forward illumination light from the peripheral region 34 can be greatly increased. It is possible to make the light guide 30 appear to shine brightly up to its outer peripheral edge.
  • the light guide 30 It is possible to make even the outer peripheral edge appear to shine brightly.
  • each of the plurality of incidence control elements 34S is configured such that the second reflecting surface 34S2 thereof is an inclined surface that is inclined toward the outer periphery toward the front of the lamp. Since the outer peripheral region 34S2B of the second reflecting surface 34S2 is formed with a larger inclination angle than the inner peripheral region 34S2A, the following effects can be obtained.
  • the light from the light emitting element 22 totally reflected by the first reflecting surface 32Ba of the central region 32 is incident on the outer peripheral region 34S2B of the second reflecting surface 34S2 of each of the plurality of incidence control elements 34S.
  • the outer peripheral region 34S2B is formed with a larger inclination angle than the inner peripheral region 34S2A, the light enters from the second incident surface 34S1 of the peripheral region 34 and then enters the inner peripheral region of the second reflecting surface 34S2.
  • the light from the light emitting element 22 totally reflected by 34S2A and the light from the light emitting element 22 totally reflected by the outer peripheral side area 34S2B of the second reflecting surface 34S2 after being totally reflected by the first reflecting surface 32Ba of the central area 32 are It is possible to irradiate the light as light directed in substantially the same direction close to the front direction of the lamp. As a result, the peripheral area 34 of the light guide 30 can be made to appear to shine brightly over its entire area when viewed from the front of the lamp.
  • the plurality of incident control elements 34S are arranged in a state of being gradually displaced toward the front side of the lamp from the inner peripheral side toward the outer peripheral side of the peripheral region 34.
  • the light from the light emitting element 22 totally reflected by the reflecting surface 32Ba can be efficiently made incident on the second reflecting surface 34S2.
  • a plurality of emission control elements 34E1 and 34E2 for controlling the emission of light from the light emitting elements 22 totally reflected by the second reflecting surfaces 34S2 of the plurality of incidence control elements 34S are provided on the front surface of the peripheral region 34. are formed in a state of being aligned from the inner peripheral side to the outer peripheral side of the peripheral region 34, the light distribution control by the light guide 30 can be performed with high accuracy.
  • the plurality of emission control elements 34E1 and 34E2 are configured to deflect and emit the light from the light emitting element 22, which is totally reflected by the second reflecting surface 34S2, toward the central region 32.
  • the emission control element 34E2 positioned at the outer peripheral edge of the 34 is configured to largely deflect the light emitted from the light emitting element 22 and totally reflected by the second reflecting surface 34S2 toward the central region 32. To prevent the extension panel 50 from inadvertently blocking forward irradiation light from a peripheral area 34 even though the extension panel 50 is arranged as a lamp component around the light body 30. - ⁇ be able to.
  • each of the plurality of emission control elements 34E1 and 34E2 is configured to emit the light from the light emitting element 22 that has been totally reflected by the second reflecting surface 34S2 as light diffused in the circumferential direction with respect to the reference axis Ax.
  • the peripheral area 34 of the light guide 30 can be made to appear to shine uniformly over its entire area not only when viewed from the front of the lamp but also when observed from a direction slightly inclined from the front of the lamp.
  • the light emitting element 22 is arranged with its light emitting surface 22a facing forward.
  • the intensity of the emitted light toward the central region 32 of the light guide 30 located substantially perpendicular to the light emitting surface 22a increases, while the intensity of the emitted light toward the peripheral region 34 of the light guide 30 decreases significantly. It is particularly effective to employ the configuration in which the light from the light emitting element 22 totally reflected by the first reflecting surface 32Ba of the central region 32 as in this embodiment is used as the forward illumination light from the peripheral region 34 .
  • the light source is composed of the light emitting elements 22 of the light source unit 20. Therefore, even if there is variation in the light source luminous flux, the proper light source luminous flux can be obtained by exchanging the light source unit 20. It is possible to ensure On the other hand, when the light source unit 20 is housed in the lamp chamber as in the present embodiment, there may be a case where the lamp configuration is such that it cannot be replaced. It is easy to cause the variation of . However, if, as in the present embodiment, bright light directed from the light emitting element 22 toward the central region 32 of the light guide 30 is directed to the peripheral region 34, the forward irradiation light from the peripheral region 34 is greatly increased. Thus, even if there is some variation in the light flux of the light source, it is possible to make the light guide 30 appear to shine brightly even at its outer peripheral edge.
  • peripheral region 34 of the light guide 30 has been described as having a horizontally long rectangular outer shape, but other outer shapes (for example, elliptical, parallelogram, etc.) may be used. It is also possible to have a configuration with
  • the plurality of incident control elements 34S are formed concentrically, but other arrangements (for example, it is also possible to adopt a configuration formed in a vertical striped pattern or a lattice pattern.
  • the light source unit 20 has been described as having a single light emitting element 22, but a configuration having a plurality of light emitting elements 22 is also possible.
  • the light source unit 20 has been described as being supported by the holder panel 40 arranged in the lamp chamber. It is also possible to
  • the extension panel 50 is arranged around the light guide 30.
  • other lamp components for example, the flange portion of the inner lens
  • the vehicle lamp 10 is a front turn signal lamp provided in the front part of the vehicle.
  • a tail lamp, a stop lamp, a daytime running lamp, a clearance lamp, etc. can be employed in addition to the front turn signal lamp.
  • red or white light-emitting diodes or the like in addition to amber light-emitting diodes in accordance with the functions of these lamps.
  • FIG. 7 is a view similar to FIG. 5, showing the main part of the light guide 130 according to this modified example.
  • the light guide 130 of this modified example also has the same basic configuration as that of the above-described embodiment, but a plurality of incident control elements 134S are formed on the rear surface of the peripheral region 134 thereof. is partly different from that of the above embodiment.
  • the plurality of incidence control elements 134S are formed in a state of being aligned from the inner peripheral side to the outer peripheral side of the peripheral region 134, and each of the plurality of incidence control elements 134S A second incident surface 134S1 that receives direct light A from a light-emitting element (not shown), and a lamp that receives the direct light A incident from the second incident surface 134S1 and reflected light B from a central region (not shown).
  • the configuration includes a second reflecting surface 134S2 that totally reflects light toward the front, the cross-sectional shape of the second reflecting surface 134S2 is different from that of the above-described embodiment.
  • the outer peripheral region 134S2B is formed with a larger inclination angle than the inner peripheral region 134S2A. is different from the case of the above-described embodiment in that it has a cross-sectional shape that is connected by a continuous concave curve.
  • the reflected light B that reaches the outer peripheral region 134S2B of the second reflecting surface 134S2 as substantially parallel light is totally reflected by the outer peripheral region 134S2B formed in the concave curve shape, and then The light is directed toward the front of the lamp as light that is slightly diffused toward the inner and outer circumferences with respect to the front direction of the lamp.
  • the direct light A that reaches the second incident surface 134S1 as light that spreads slightly more than the parallel light spreads from the second incident surface 134S1 as light that spreads slightly more than the parallel light.
  • the light After reaching the inner peripheral side area 134S2A of the second reflecting surface 134S2 and being totally reflected by the inner peripheral side area 134S2A formed in the shape of a concave curve, the light is relatively large toward the inner peripheral side and the outer peripheral side with respect to the front direction of the lamp. It goes to the front of the lamp as diffused light.
  • the direct light A reaching the rear end portion 134Sa of the incidence control element 134S enters from the second incident surface 134S1, converges once, and then reaches the inner peripheral side area 134S2A of the second reflecting surface 134S2 as diffused light. After being totally reflected by the inner peripheral region 134S2A formed in the shape of a concave curve, the light travels toward the front of the lamp as light that is relatively greatly diffused toward the inner and outer peripheral sides with respect to the front direction of the lamp.
  • the light diffuses relatively greatly toward the inner peripheral side and the outer peripheral side with respect to the front direction of the lamp.
  • the total reflected light from the entire second reflecting surface 134S2 is diffused light with a relatively small spread from the outer peripheral side region 134S2B, which is derived from the reflected light B traveling in a direction close to the front direction of the lamp.
  • the light is mixed with the light originating from the direct light A traveling in a direction close to the front of the lamp as diffused light with a relatively large spread from the inner peripheral side area 134S2A.
  • the light derived from the reflected light B is totally reflected toward the front of the lamp as brighter light than the light derived from the direct light A.
  • the total reflected light from the entire second reflecting surface 134S2 can be light that spreads to the inner peripheral side and the outer peripheral side more than in the case of the above embodiment. Therefore, not only when viewed from the front of the lamp but also when observed from a direction slightly inclined from the front of the lamp, the effect of making the peripheral region 134 of the light guide 130 appear to shine uniformly over the entire area can be enhanced. can.
  • FIG. 8 is a view similar to FIG. 5, showing the main part of the light guide 230 according to this modified example.
  • the light guide 230 of this modified example has the same basic configuration as that of the above embodiment, but a plurality of incident control elements 234S are formed on the rear surface of the peripheral region 234. As shown in FIG. is partly different from that of the above embodiment.
  • the plurality of incidence control elements 234S are formed in a state of being aligned from the inner peripheral side to the outer peripheral side of the peripheral region 234, and each of the plurality of incidence control elements 234S A second incident surface 234S1 that receives direct light A from a light-emitting element (not shown), and a lamp that receives the direct light A incident from the second incident surface 234S1 and reflected light B from a central region (not shown).
  • the configuration includes a second reflecting surface 234S2 that totally reflects light forward, the cross-sectional shape of the second reflecting surface 234S2 is different from that of the above-described embodiment.
  • the inner peripheral side region 234S2A and the outer peripheral side region 234S2B are formed with the same inclination angle, and the inclination angle is the same as that of the second reflecting surface of the above-described embodiment. It is set to the same value as the inclination angle of the outer peripheral side region 34S2B in 34S2.
  • each of the plurality of incidence control elements 234S has a rear end portion 234Sa that is rounder than in the above embodiment and has a cross-sectional shape close to a pin angle.
  • the reflected light B that has reached the outer peripheral region 234S2B of the second reflecting surface 234S2 as substantially parallel light is totally reflected by the outer peripheral region 234S2B as in the above embodiment, and then It becomes substantially parallel light in a direction slightly inclined toward the inner peripheral side with respect to the front direction of the lamp.
  • the direct light A that reaches the second incident surface 234S1 as light that spreads slightly more than the parallel light spreads from the second incident surface 234S1 as light that spreads slightly more than the parallel light.
  • the total reflected light from the entire second reflecting surface 234S2 is diffused light with a relatively small spread from the outer peripheral side region 234S2B, which originates from the reflected light B traveling in a direction close to the front direction of the lamp.
  • the light is mixed with the light derived from the direct light A that travels in a direction greatly inclined to the outer peripheral side with respect to the front direction of the lamp as substantially parallel light and diffused light from the inner peripheral side area 234S2A and the outer peripheral side area 234S2B.
  • the light derived from the reflected light B is totally reflected toward the front of the lamp as brighter light than the light derived from the direct light A.
  • the bright light originating from the reflected light B makes the peripheral region 34 appear to shine with a certain degree of brightness, and then the light originating from the direct light A greatly tilts from the front direction of the lamp.
  • the peripheral region 34 can also be made to appear shiny from any direction.
  • Vehicle lamp 12 Lamp body 14 Translucent cover 20
  • Light source unit 22 Light emitting element (light source) 22a light emitting surface 24 substrate 26 plug 26a heat radiation fin 28 packing 30, 130, 230 light guide 32 central region 32a first incidence surface 32A transmission control section 32Aa first emission surface 32B reflection control section 32Ba first reflection surface 34, 134, 234 Peripheral area 34E1, 34E2 Output control element 34S, 134S, 234S Incidence control element 34Sa, 134Sa, 234Sa Rear end 34S1, 134S1, 234S1 Second incidence surface 34S2, 134S2, 234S2 Second reflection surface 34S2A, 134S2A, 234S2 A inner circumference Side area 34S2B, 134S2B, 234S2B Outer peripheral area 36 Outer peripheral wall 40 Holder panel 40a Light source support hole 50 Extension panel 50a Opening A Direct light Ax Reference axis B Reflected light

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Abstract

In this vehicle lamp configured to emit outgoing light from a light source toward the front side of the lamp via a light guiding body, the light guiding body as well as the outer peripheral edge portion thereof is made to appear to shine brightly. A light guiding body (30) is configured to totally reflect outgoing light from a light-emitting element (22) that has entered a center area (32) thereof toward a peripheral area (34), and has a configuration in which a plurality of incidence control elements (34S) for controlling the incidence of direct light from the light-emitting element (22) are formed on the back side of the peripheral area (34) in alignment from the inner peripheral side to the outer peripheral side. The plurality of incidence control elements (34S) each comprise a second incident surface (34S1) on which the direct light from the light-emitting element (22) is incident and a second reflecting surface (34S2) that totally reflects the incident light toward the front side of the lamp, and are each disposed such that the totally reflected light from the center area (32) can be incident on the second reflecting surface (34S2). With this configuration, bright light traveling from the light-emitting element (22) toward the center area (32) of the light guiding body (30) is directed to the peripheral area (34).

Description

車両用灯具vehicle lamp
　本願発明は、導光体を備えた車両用灯具に関するものである。 The present invention relates to a vehicle lamp equipped with a light guide.
　従来より、光源からの出射光を、導光体を介して灯具前方へ向けて照射するように構成された車両用灯具が知られている。 Conventionally, there has been known a vehicular lamp that is configured to irradiate light emitted from a light source toward the front of the lamp via a light guide.
　「特許文献１」には、このような車両用灯具の構成として、導光体の後面に、光源からの直射光を入射制御するための複数の入射制御素子が、その内周側から外周側へ向けて並んだ状態で形成されたものが記載されている。 In "Patent Document 1", as a configuration of such a vehicle lamp, a plurality of incidence control elements for controlling the incidence of direct light from a light source are provided on the rear surface of a light guide body from the inner peripheral side to the outer peripheral side. Those formed in a state of being lined up toward the direction are described.
　この「特許文献１」に記載された複数の入射制御素子の各々は、光源からの直射光を入射させる入射面と、この入射面から入射した光源からの光を灯具前方へ向けて全反射させる反射面とを備えた構成となっている。 Each of the plurality of incidence control elements described in this "Patent Document 1" has an incidence surface for receiving direct light from a light source and totally reflects the light from the light source incident from this incidence surface toward the front of the lamp. and a reflective surface.
特開２００９－１８７８５９号公報JP 2009-187859 A
　上記「特許文献１」に記載されているような構成を採用することにより、光源から灯具前方へ向けて出射する直射光を広範囲にわたって前方照射光として利用することが可能となる。 By adopting the configuration described in "Patent Document 1" above, it is possible to use the direct light emitted from the light source toward the front of the lamp as front illumination light over a wide range.
　しかしながら、このような車両用灯具においては、光源から灯具前方へ向けて出射する直射光のうち、導光体の外周縁部へ向かう光に関しては十分な光量が得られない場合が多く、このため導光体をその外周縁部まで明るく光って見えるようにすることが容易でない。 However, in such a vehicle lamp, out of the direct light emitted from the light source toward the front of the lamp, the light directed toward the outer peripheral edge of the light guide often cannot obtain a sufficient amount of light. It is not easy to make the light guide appear to shine brightly to its outer periphery.
　本願発明は、このような事情に鑑みてなされたものであって、光源からの出射光を、導光体を介して灯具前方へ向けて照射するように構成された車両用灯具において、導光体がその外周縁部まで明るく光って見えるようにすることができる車両用灯具を提供することを目的とするものである。 The present invention has been made in view of such circumstances, and provides a vehicle lamp configured to irradiate light emitted from a light source toward the front of the lamp via a light guide body. To provide a vehicular lamp capable of making a person's body appear to shine brightly up to its outer peripheral edge.
　本願発明は、導光体の構成に工夫を施すことにより、上記目的達成を図るようにしたものである。 The present invention aims to achieve the above object by devising the configuration of the light guide.
　すなわち、本願発明に係る車両用灯具は、
　光源からの出射光を、導光体を介して灯具前方へ向けて照射するように構成された車両用灯具において、
　上記導光体は、上記光源の灯具前方に位置する中心領域と、上記中心領域の周囲に位置する周辺領域とを備えており、
　上記中心領域は、上記光源からの直射光を入射させる第１入射面と、上記第１入射面から入射した上記光源からの光を上記周辺領域へ向けて全反射させる第１反射面とを備えており、
　上記周辺領域の後面に、上記光源からの直射光を入射制御するための複数の入射制御素子が、上記周辺領域の内周側から外周側へ向けて並んだ状態で形成されており、
　上記複数の入射制御素子の各々は、上記光源からの直射光を入射させる第２入射面と、上記第２入射面から入射した上記光源からの光を灯具前方へ向けて全反射させる第２反射面とを備えており、
　上記複数の入射制御素子の各々は、上記第１反射面で全反射した上記光源からの光が上記第２反射面に入射し得る位置に配置されている、ことを特徴とするものである。 That is, the vehicle lamp according to the present invention is
A vehicle lamp configured to emit light emitted from a light source toward the front of the lamp via a light guide,
The light guide has a central area located in front of the lamp of the light source and a peripheral area located around the central area,
The central region includes a first incident surface for direct light incident from the light source, and a first reflecting surface for totally reflecting the light from the light source incident from the first incident surface toward the peripheral region. and
A plurality of incidence control elements for controlling the incidence of direct light from the light source are formed on the rear surface of the peripheral region in a state of being aligned from the inner peripheral side to the outer peripheral side of the peripheral region,
Each of the plurality of incident control elements has a second incident surface for receiving direct light from the light source, and a second reflection surface for totally reflecting the light from the light source incident from the second incident surface toward the front of the lamp. has a surface and
Each of the plurality of incidence control elements is arranged at a position where light from the light source totally reflected by the first reflecting surface can enter the second reflecting surface.
　上記「車両用灯具」の種類は特に限定されるものではなく、例えばテールランプ、クリアランスランプ、フロントターンシグナルランプ等が採用可能である。 The type of "vehicle lamp" is not particularly limited, and for example, tail lamps, clearance lamps, front turn signal lamps, etc. can be used.
　上記「光源」の種類は特に限定されるものではなく、例えば発光ダイオードや光源バルブ等が採用可能である。 The type of the above "light source" is not particularly limited, and for example, light emitting diodes, light source bulbs, etc. can be adopted.
　上記「中心領域」および「周辺領域」の各々の具体的な範囲および外形形状は特に限定されるものではない。 The specific range and outer shape of each of the above "central region" and "peripheral region" are not particularly limited.
　本願発明に係る車両用灯具は導光体を備えているが、この導光体は中心領域と周辺領域とを備えており、その周辺領域の後面には光源からの直射光を入射制御するための複数の入射制御素子が内周側から外周側へ向けて並んだ状態で形成されており、かつ、複数の入射制御素子の各々は、光源からの直射光を入射させる第２入射面と、この第２入射面から入射した光源からの光を灯具前方へ向けて全反射させる第２反射面とを備えているので、光源から灯具前方へ向けて出射する光を広範囲にわたって前方照射光として利用することができる。 A vehicle lamp according to the present invention includes a light guide. This light guide has a central area and a peripheral area. are formed in a state of being aligned from the inner peripheral side to the outer peripheral side, and each of the plurality of incidence control elements has a second incident surface on which direct light from the light source is incident; The light emitted from the light source toward the front of the lamp is used over a wide range as forward illuminating light because the second reflecting surface is provided to totally reflect the light from the light source incident from the second incident surface toward the front of the lamp. can do.
　その上で、導光体の中心領域は、光源からの直射光を入射させる第１入射面と、この第１入射面から入射した光源からの光を周辺領域へ向けて全反射させる第１反射面とを備えており、かつ、複数の入射制御素子の各々は、中心領域の第１反射面で全反射した光源からの光が第２反射面に入射し得る位置に配置されているので、中心領域の第１反射面で全反射した光源からの光についても、これを周辺領域からの前方照射光として利用することができる。 In addition, the central region of the light guide includes a first incident surface for receiving direct light from the light source, and a first reflection surface for totally reflecting the light from the light source incident from the first incident surface toward the peripheral region. and each of the plurality of incidence control elements is arranged at a position where the light from the light source totally reflected by the first reflecting surface in the central region can enter the second reflecting surface, The light from the light source that is totally reflected by the first reflecting surface in the central area can also be used as forward illumination light from the peripheral area.
　そして、このように光源から導光体の中心領域へ向かう明るい光を周辺領域へ振り向けることにより、周辺領域からの前方照射光を大幅に増大させることができ、これにより導光体がその外周縁部まで明るく光って見えるようにすることができる。 And by diverting bright light from the light source toward the central region of the lightguide in this way to the peripheral region, the forward illuminating light from the peripheral region can be greatly increased, thereby allowing the lightguide to illuminate the outside of the lightguide. It is possible to make even the peripheral part appear to shine brightly.
　このように本願発明によれば、光源からの出射光を、導光体を介して灯具前方へ向けて照射するように構成された車両用灯具において、導光体がその外周縁部まで明るく光って見えるようにすることができる。 As described above, according to the present invention, in a vehicle lamp configured to irradiate light emitted from a light source toward the front of the lamp via a light guide, the light guide shines brightly up to its outer peripheral edge. can be made visible.
　上記構成において、さらに、複数の入射制御素子の各々の構成として、第２反射面が灯具前方へ向けて外周側に傾斜した傾斜面で構成されたものとした上で、その外周側領域が内周側領域よりも大きい傾斜角度で形成されたものとすれば、次のような作用効果を得ることができる。 In the above configuration, each of the plurality of incidence control elements is further configured such that the second reflecting surface is formed of an inclined surface inclined toward the outer circumference toward the front of the lamp, and the outer circumference side area is the inner side. If it is formed with a larger angle of inclination than the circumferential region, the following effects can be obtained.
　すなわち、中心領域の第１反射面で全反射した光源からの光は、複数の入射制御素子の各々に対して、その第２反射面の外周側領域に入射することとなるが、この外周側領域は内周側領域よりも大きい傾斜角度で形成されているので、周辺領域の第２入射面から入射した後に第２反射面の内周側領域で全反射した光源からの光と、中心領域の第１反射面で全反射した後に第２反射面の外周側領域で全反射した光源からの光とが、灯具正面方向に近い略同一方向へ向かう光として照射されるようにすることができる。そしてこれにより、灯具正面視において導光体の周辺領域がその全域にわたって明るく光って見えるようにすることができる。 That is, the light from the light source totally reflected by the first reflecting surface in the central area is incident on each of the plurality of incidence control elements on the outer peripheral side area of the second reflecting surface. Since the area is formed with a larger inclination angle than the inner peripheral side area, the light from the light source, which is incident from the second incident surface of the peripheral area and then totally reflected by the inner peripheral side area of the second reflecting surface, and the central area. After being totally reflected by the first reflecting surface, the light from the light source, which is totally reflected by the outer peripheral region of the second reflecting surface, can be irradiated as light traveling in substantially the same direction close to the front direction of the lamp. . As a result, when viewed from the front of the lamp, the peripheral area of the light guide can be seen to shine brightly over its entire area.
　その際、上記「内周側領域」および「外周側領域」の各々の具体的な範囲は特に限定されるものではなく、また、外周側領域が内周側領域よりも大きい傾斜角度で形成されていれば、その各々の具体的な傾斜角度は特に限定されるものではない。 At that time, the specific range of each of the "inner peripheral side area" and the "outer peripheral side area" is not particularly limited, and the outer peripheral side area is formed with a larger inclination angle than the inner peripheral side area. If so, each specific inclination angle is not particularly limited.
　上記構成において、さらに、複数の入射制御素子が、周辺領域の内周側から外周側へ向けて灯具前方側に徐々に変位した状態で配置された構成とすれば、中心領域の第１反射面で全反射した光源からの光を効率良く第２反射面に入射させることができる。 In the above configuration, if the plurality of incident control elements are arranged in a state in which they are gradually displaced toward the front side of the lamp from the inner peripheral side toward the outer peripheral side of the peripheral region, then the first reflecting surface of the central region The light from the light source totally reflected at can be efficiently made incident on the second reflecting surface.
　上記構成において、さらに、周辺領域の前面に、複数の入射制御素子の第２反射面で全反射した光源からの光を出射制御するための複数の出射制御素子が、周辺領域の内周側から外周側へ向けて並んだ状態で形成された構成とすれば、導光体による配光制御を精度良く行うことが可能となる。その際、複数の出射制御素子のうち少なくとも周辺領域の外周縁部に位置する出射制御素子が、第２反射面で全反射した光源からの光を中心領域寄りの方向へ偏向出射させるように構成されたものとすれば、導光体の周辺に他の灯具構成部材が配置されているような場合であっても、この灯具構成部材によって周辺領域からの前方照射光が不用意に遮られてしまうのを未然に防止することができる。 In the above configuration, a plurality of emission control elements for controlling the emission of light from the light source, which is totally reflected by the second reflecting surfaces of the plurality of incidence control elements, is further provided on the front surface of the peripheral area from the inner peripheral side of the peripheral area. With a configuration in which the light guides are arranged in a row toward the outer periphery, light distribution control by the light guide can be performed with high accuracy. At this time, among the plurality of emission control elements, at least the emission control elements positioned at the outer peripheral edge of the peripheral region are configured to deflect and emit the light from the light source, which is totally reflected by the second reflecting surface, toward the central region. If this is the case, even if other lamp constituent members are arranged around the light guide, the forward illumination light from the peripheral area may be inadvertently blocked by the lamp constituent members. It is possible to prevent it from being put away.
　上記構成において、さらに、上記光源が、発光面を灯具前方へ向けた状態で配置された発光素子で構成されている場合には、この発光素子からの出射光の配光分布は、その発光面の略面直方向に位置する導光体の中心領域への出射光の強度が大きくなる反面、導光体の周辺領域へ向かう出射光の強度は大幅に小さくなるので、本願発明のように中心領域の第１反射面で全反射した発光素子からの光を周辺領域からの前方照射光として利用する構成を採用することが特に効果的である。 In the above configuration, if the light source is composed of a light-emitting element arranged with the light-emitting surface facing forward of the lamp, the light distribution of the light emitted from the light-emitting element is the same as that of the light-emitting surface While the intensity of the emitted light toward the central region of the light guide located substantially perpendicular to the surface of the light guide increases, the intensity of the emitted light toward the peripheral region of the light guide decreases significantly. It is particularly effective to employ a configuration in which the light from the light-emitting element that is totally reflected by the first reflecting surface of the region is used as forward illumination light from the peripheral region.
本願発明の一実施形態に係る車両用灯具を示す正面図1 is a front view showing a vehicle lamp according to an embodiment of the present invention; FIG. 図１のII－II線断面図II-II line sectional view of Fig. 1 図２のIII 部詳細図Detailed view of part III in Fig. 2 図３のIV部詳細図Detailed view of part IV in Fig. 3 図４のＶ部詳細図Detailed view of V part in FIG. 上記車両用灯具の導光体における周辺領域で行われる配光制御の様子を示す側断面図FIG. 4 is a side cross-sectional view showing how light distribution control is performed in the peripheral region of the light guide of the vehicle lamp. 上記実施形態の第１変形例を示す、図５と同様の図FIG. 6 is a view similar to FIG. 5 showing a first modification of the above embodiment; 上記実施形態の第２変形例を示す、図５と同様の図FIG. 6 is a view similar to FIG. 5 showing a second modification of the above embodiment;
　以下、図面を用いて、本願発明の実施の形態について説明する。 Embodiments of the present invention will be described below with reference to the drawings.
　図１は、本願発明の一実施形態に係る車両用灯具１０を示す正面図であり、図２は図１のII－II線断面図である。 FIG. 1 is a front view showing a vehicle lamp 10 according to one embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along line II-II of FIG.
　図１、２において、Ｘで示す方向が車両用灯具１０としての「前方」（車両としても「前方」）であり、Ｙで示す方向が車両用灯具１０としての「左方向」（車両としても「左方向」）であり、Ｚで示す方向が「上方向」である。図１、２以外の図においても同様である。 In FIGS. 1 and 2, the direction indicated by X is the "forward" direction of the vehicle lamp 10 (also "forward" as the vehicle), and the direction indicated by Y is the "left direction" of the vehicle lamp 10 (also known as the vehicle). "leftward"), and the direction indicated by Z is "upward". The same applies to figures other than FIGS.
　図１、２に示すように、本実施形態に係る車両用灯具１０は、車両前部に配置されるフロントターンシグナルランプであって、ランプボディ１２と、このランプボディ１２の前端開口部に取り付けられた素通し状の透光カバー１４とで形成される灯室内に、光源ユニット２０と導光体３０とホルダーパネル４０とエクステンションパネル５０とが組み込まれた構成となっている。そして、この車両用灯具１０は、光源ユニット２０からの出射光を、導光体３０を介して灯具前方へ向けて照射するように構成されている。 As shown in FIGS. 1 and 2, a vehicle lamp 10 according to the present embodiment is a front turn signal lamp that is arranged in the front part of a vehicle. A light source unit 20, a light guide 30, a holder panel 40, and an extension panel 50 are incorporated in a lamp chamber formed by a transparent light-transmitting cover 14. The vehicle lamp 10 is configured to irradiate the light emitted from the light source unit 20 through the light guide 30 toward the front of the lamp.
　光源ユニット２０は、光源としての発光素子２２が基板２４を介してプラグ２６に支持された構成となっている。この光源ユニット２０は、ホルダーパネル４０に形成された光源支持孔４０ａにおいてホルダーパネル４０に支持されている。この支持は、プラグ２６の前端部を光源支持孔４０ａに灯具後方側から挿入した状態で、所定量回転させてホルダーパネル４０と嵌合させることによって行われている。この嵌合が確実に行われるようにするため、プラグ２６にはパッキン２８が装着されている。また、プラグ２６の後部には複数の放熱フィン２６ａが形成されている。 The light source unit 20 has a structure in which a light emitting element 22 as a light source is supported by a plug 26 via a substrate 24 . The light source unit 20 is supported by the holder panel 40 through light source support holes 40 a formed in the holder panel 40 . This support is performed by inserting the front end portion of the plug 26 into the light source support hole 40 a from the rear side of the lamp and rotating it by a predetermined amount to fit it into the holder panel 40 . A packing 28 is attached to the plug 26 to ensure this fitting. A plurality of heat radiation fins 26a are formed on the rear portion of the plug 26. As shown in FIG.
　ホルダーパネル４０は、その外周縁部においてランプボディ１２に支持されている。 The holder panel 40 is supported by the lamp body 12 at its outer peripheral edge.
　発光素子２２は、正方形の発光面２２ａを有するアンバー色の発光ダイオードであって、光源ユニット２０がホルダーパネル４０に支持された状態において、その発光面２２ａが灯具前方（具体的には灯具正面方向）を向いた状態で配置されるように構成されている。 The light emitting element 22 is an amber light emitting diode having a square light emitting surface 22a. When the light source unit 20 is supported by the holder panel 40, the light emitting surface 22a faces the front of the lamp (more ) is configured to be placed facing the
　導光体３０は、アクリル（ＰＭＭＡ）樹脂やポリカーボネート（ＰＣ）樹脂等の透明樹脂成形品であって、発光素子２２からの出射光を導光するように構成されている。この導光体３０は、発光素子２２に対して灯具正面方向に位置する中心領域３２と、この中心領域３２の周囲に位置する周辺領域３４と、この周辺領域３４の周囲に位置する外周壁部３６とを備えており、その外周壁部３６においてホルダーパネル４０に支持されている。 The light guide 30 is a transparent resin molded product such as acrylic (PMMA) resin or polycarbonate (PC) resin, and is configured to guide the light emitted from the light emitting element 22 . The light guide 30 includes a central region 32 positioned in the front direction of the lamp with respect to the light emitting element 22, a peripheral region 34 positioned around the central region 32, and an outer peripheral wall portion positioned around the peripheral region 34. 36, and is supported by the holder panel 40 at the outer peripheral wall portion 36 thereof.
　中心領域３２は、発光素子２２の発光中心を通るようにして灯具前後方向に延びる基準軸線Ａｘを中心にして形成されており、灯具正面視において円形の外形形状を有している。 The central region 32 is formed around a reference axis line Ax extending in the front-rear direction of the lamp so as to pass through the light emission center of the light-emitting element 22, and has a circular outer shape when viewed from the front of the lamp.
　中心領域３２の中央部は、発光素子２２からの直射光を透過制御する透過制御部３２Ａとして構成されており、その外周部は発光素子２２からの直射光を反射制御制御する反射制御部３２Ｂとして構成されている。 The central portion of the central region 32 is configured as a transmission control portion 32A that controls transmission of direct light from the light emitting element 22, and the outer peripheral portion thereof is configured as a reflection control portion 32B that controls reflection of direct light from the light emitting element 22. It is configured.
　中心領域３２の後面は、発光素子２２の発光中心からの直射光を基準軸線Ａｘと平行な光として入射させる第１入射面３２ａとして構成されている。 The rear surface of the central region 32 is configured as a first incident surface 32a that allows direct light from the light emitting center of the light emitting element 22 to enter as light parallel to the reference axis Ax.
　中心領域３２における透過制御部３２Ａの前面は、第１入射面３２ａから入射した発光素子２２からの直射光を、基準軸線Ａｘと平行な方向に対して僅かに拡がる方向へ向けて出射させる第１出射面３２Ａａとして構成されている。この第１出射面３２Ａａは、その中央部に対して外周部が灯具前方側に変位した状態で階段状に形成されている。 The front surface of the transmission control section 32A in the central region 32 directs the direct light from the light emitting element 22 incident from the first incident surface 32a in a direction slightly expanding with respect to the direction parallel to the reference axis Ax. It is configured as an emission surface 32Aa. The first emission surface 32Aa is formed in a stepped shape with the outer peripheral portion displaced toward the front side of the lamp with respect to the central portion.
　中心領域３２における反射制御部３２Ｂの前面は、第１入射面３２ａから入射した発光素子２２からの直射光を周辺領域３４へ向けて全反射させる第１反射面３２Ｂａとして構成されている。 The front surface of the reflection control section 32B in the central region 32 is configured as a first reflecting surface 32Ba that totally reflects the direct light from the light emitting element 22 incident from the first incident surface 32a toward the peripheral region 34.
　具体的には、第１反射面３２Ｂａは、基準軸線Ａｘを中心軸とする円錐面で構成されており、これにより第１反射面３２Ｂａに到達した第１入射面３２ａからの入射光を基準軸線Ａｘを中心にしてその径方向外方へ向けて全反射させるようになっている。その際、この第１反射面３２Ｂａは、第１入射面３２ａからの入射光を基準軸線Ａｘと直交する鉛直面に対して僅かに灯具後方寄りの方向へ向けて全反射させるように、その傾斜角度が設定されている。 Specifically, the first reflecting surface 32Ba is formed of a conical surface having the reference axis Ax as a central axis, and thus the incident light from the first incident surface 32a reaching the first reflecting surface 32Ba is reflected by the reference axis. The light is totally reflected radially outward with Ax as the center. At this time, the first reflecting surface 32Ba is inclined so as to totally reflect the incident light from the first incident surface 32a in a direction slightly toward the rear of the lamp with respect to the vertical plane perpendicular to the reference axis Ax. angle is set.
　周辺領域３４は、灯具正面視において基準軸線Ａｘを中心とする横長矩形状の外形形状を有している。 The peripheral area 34 has a horizontally long rectangular outer shape centered on the reference axis Ax when viewed from the front of the lamp.
　周辺領域３４の後面には、発光素子２２からの直射光を入射制御するための複数の入射制御素子３４Ｓが、周辺領域３４の内周側から外周側へ向けて並んだ状態で形成されている。 A plurality of incident control elements 34S for controlling the incidence of direct light from the light emitting elements 22 are formed on the rear surface of the peripheral region 34 in a state of being aligned from the inner peripheral side to the outer peripheral side of the peripheral region 34. .
　具体的には、複数の入射制御素子３４Ｓは、灯具正面視において基準軸線Ａｘを中心にして円環状に延びるように形成されている。その際、これら複数の入射制御素子３４Ｓは、略同一の断面形状でかつ略一定の幅で形成されている。 Specifically, the plurality of incident control elements 34S are formed to extend annularly around the reference axis Ax when viewed from the front of the lamp. At that time, the plurality of incidence control elements 34S are formed with substantially the same cross-sectional shape and substantially constant width.
　複数の入射制御素子３４Ｓの各々は、発光素子２２からの直射光を入射させる第２入射面３４Ｓ１と、この第２入射面３４Ｓ１から入射した発光素子２２からの光を灯具前方へ向けて全反射させる第２反射面３４Ｓ２とを備えている。 Each of the plurality of incidence control elements 34S has a second incidence surface 34S1 for receiving direct light from the light emitting element 22, and the light from the light emitting element 22 entering from the second incidence surface 34S1 is totally reflected toward the front of the lamp. and a second reflecting surface 34S2 that allows
　また、複数の入射制御素子３４Ｓの各々は、中心領域３２の第１反射面３２Ｂａで全反射した発光素子２２からの光が第２反射面３４Ｓ２に入射し得る位置に配置されている。 Also, each of the plurality of incidence control elements 34S is arranged at a position where the light from the light emitting element 22 totally reflected by the first reflecting surface 32Ba of the central region 32 can enter the second reflecting surface 34S2.
　これを容易に実現するため、複数の入射制御素子３４Ｓは、周辺領域３４の内周側から外周側へ向けて灯具前方側に徐々に変位した状態で配置されている。具体的には、複数の入射制御素子３４Ｓは、基準軸線Ａｘと直交する鉛直面に対して５～１０°程度灯具前方側に傾斜した円錐面に沿って配置されている。 In order to easily realize this, the plurality of incident control elements 34S are arranged in a state of being gradually displaced toward the front side of the lamp from the inner peripheral side of the peripheral region 34 toward the outer peripheral side. Specifically, the plurality of incidence control elements 34S are arranged along a conical surface that is inclined forward of the lamp by about 5 to 10° with respect to a vertical plane perpendicular to the reference axis Ax.
　周辺領域３４の前面には、複数の入射制御素子３４Ｓの第２反射面３４Ｓ２で全反射した発光素子２２からの光を出射制御するための複数の出射制御素子３４Ｅ１、３４Ｅ２が、周辺領域３４の内周側から外周側へ向けて並んだ状態で形成されている。これら複数の出射制御素子３４Ｅ１、３４Ｅ２は、灯具正面視において基準軸線Ａｘを中心にして同心円状に延びる複数の円環状領域が、さらに周方向に関して等角度で分割された複数の扇形セグメントに割り付けられている。 In front of the peripheral region 34, a plurality of emission control elements 34E1 and 34E2 for controlling the emission of the light from the light emitting elements 22 totally reflected by the second reflecting surfaces 34S2 of the plurality of incidence control elements 34S are provided. They are arranged in a row from the inner peripheral side to the outer peripheral side. In the plurality of emission control elements 34E1 and 34E2, a plurality of annular regions extending concentrically around the reference axis Ax in a front view of the lamp are further divided into a plurality of fan-shaped segments in the circumferential direction at equal angles. ing.
　複数の出射制御素子３４Ｅ１、３４Ｅ２は、灯具正面視において複数の入射制御素子３４Ｓと略重複する位置に形成されている。すなわち、これら複数の出射制御素子３４Ｅ１、３４Ｅ２は、径方向に関して略一定の幅で形成されている。 The plurality of emission control elements 34E1 and 34E2 are formed at positions substantially overlapping the plurality of incidence control elements 34S when viewed from the front of the lamp. That is, the plurality of emission control elements 34E1 and 34E2 are formed with a substantially constant width in the radial direction.
　複数の出射制御素子３４Ｅ１、３４Ｅ２は、第２反射面３４Ｓ２で全反射した発光素子２２からの光を灯具前方へ向けて基準軸線Ａｘ寄りの方向へ出射させるように構成されている。その際、周辺領域３４の外周縁部に位置する出射制御素子３４Ｅ２は、周辺領域３４の内周寄りに位置する出射制御素子３４Ｅ１よりも基準軸線Ａｘ寄りの方向への偏向出射角度が大きくなるように、その断面形状が設定されている。 The plurality of emission control elements 34E1 and 34E2 are configured to emit the light from the light emitting element 22, which is totally reflected by the second reflecting surface 34S2, toward the front of the lamp in a direction near the reference axis Ax. At this time, the output control element 34E2 located at the outer peripheral edge of the peripheral region 34 has a larger deflected output angle toward the reference axis Ax than the output control element 34E1 located closer to the inner periphery of the peripheral region 34. , its cross-sectional shape is set.
　複数の出射制御素子３４Ｅ１、３４Ｅ２の各々は、第２反射面３４Ｓ２で全反射した発光素子２２からの光を基準軸線Ａｘに関して周方向に拡散する光として出射させるように構成されている。 Each of the plurality of emission control elements 34E1 and 34E2 is configured to emit the light from the light emitting element 22 totally reflected by the second reflecting surface 34S2 as light diffused in the circumferential direction with respect to the reference axis Ax.
　導光体３０の外周壁部３６は、周辺領域３４の外周縁部から灯具前方へ向けてやや外周側に傾斜した方向に延びるように形成されている。この外周壁部３６は、灯具正面視において周辺領域３４の外周形状に沿って横長矩形状に延びるように形成されている。 The outer peripheral wall portion 36 of the light guide 30 is formed so as to extend from the outer peripheral edge portion of the peripheral region 34 toward the front of the lamp in a direction slightly inclined to the outer peripheral side. The outer peripheral wall portion 36 is formed to extend in a horizontally long rectangular shape along the outer peripheral shape of the peripheral region 34 when viewed from the front of the lamp.
　エクステンションパネル５０は、灯具正面視において導光体３０の外周壁部３６の前端面に沿って横長矩形状に延びるように形成されている。このエクステンションパネル５０は、導光体３０の周辺領域３４の外形形状よりもやや小さい横長矩形状の開口部５０ａを有している。そして、このエクステンションパネル５０は、その開口部５０ａから灯具後方へ向けて外周側に拡がるように形成されており、その後端部においてホルダーパネル４０に当接した状態でランプボディ１２に支持されている。 The extension panel 50 is formed to extend in a horizontally long rectangular shape along the front end surface of the outer peripheral wall portion 36 of the light guide 30 when viewed from the front of the lamp. The extension panel 50 has a laterally long rectangular opening 50 a slightly smaller than the outer shape of the peripheral region 34 of the light guide 30 . The extension panel 50 is formed so as to extend outward from the opening 50a toward the rear of the lamp, and is supported by the lamp body 12 in contact with the holder panel 40 at its rear end. .
　図３は図２のIII 部詳細図であり、図４は図３のIV部詳細図である。 　Figure 3 is a detailed view of the III part of Figure 2, and Figure 4 is a detailed view of the IV part of Figure 3.
　図３に示すように、複数の入射制御素子３４Ｓの各々において、第２入射面３４Ｓ１は灯具前方へ向けて内周側に傾斜した傾斜面として略円錐面状に形成されており、第２反射面３４Ｓ２は灯具前方へ向けて外周側に傾斜した傾斜面として略円錐面状に形成されている。 As shown in FIG. 3, in each of the plurality of incidence control elements 34S, the second incidence surface 34S1 is formed in a substantially conical shape as an inclined surface inclined inward toward the front of the lamp. The surface 34S2 is formed in a substantially conical shape as an inclined surface inclined toward the outer circumference toward the front of the lamp.
　複数の入射制御素子３４Ｓの各々の後端部３４Ｓａは、丸みを帯びた断面形状を有している。一方、複数の入射制御素子３４Ｓ相互間の接続部分は、ほとんど丸みの無いピン角状の断面形状を有している。 A rear end portion 34Sa of each of the plurality of incidence control elements 34S has a rounded cross-sectional shape. On the other hand, the connecting portion between the plurality of incidence control elements 34S has a pin square cross-sectional shape with little roundness.
　第２反射面３４Ｓ２は、その内周側領域３４Ｓ２Ａよりも外周側領域３４Ｓ２Ｂの方が大きい傾斜角度で形成されている。なお、第２反射面３４Ｓ２の内周側領域３４Ｓ２Ａは、第２入射面３４Ｓ１よりも大きい傾斜角度で形成されている。 The second reflecting surface 34S2 is formed with a larger inclination angle in the outer peripheral side area 34S2B than in the inner peripheral side area 34S2A. In addition, the inner circumferential side area 34S2A of the second reflecting surface 34S2 is formed with a larger inclination angle than the second incident surface 34S1.
　図４に示すように、第２反射面３４Ｓ２の外周側領域３４Ｓ２Ｂは、中心領域３２の第１反射面３２Ｂａで全反射した発光素子２２からの光（以下、単に「反射光Ｂ」ともいう）が第２反射面３４Ｓ２に対して入射し得る最大範囲にわたって形成されており、それ以外の領域が内周側領域３４Ｓ２Ａとして形成されている。 As shown in FIG. 4, the outer peripheral region 34S2B of the second reflecting surface 34S2 is the light from the light emitting element 22 totally reflected by the first reflecting surface 32Ba of the central region 32 (hereinafter also simply referred to as "reflected light B"). is formed over the maximum range that can be incident on the second reflecting surface 34S2, and the other area is formed as an inner peripheral side area 34S2A.
　複数の入射制御素子３４Ｓの各々は、その第２反射面３４Ｓ２の外周側領域３４Ｓ２Ｂにおいて、中心領域３２からの反射光Ｂを灯具前方へ向けて全反射させるとともに、その第２反射面３４Ｓ２の内周側領域３４Ｓ２Ａにおいて、第２入射面３４Ｓ１から入射した発光素子２２からの光（以下、単に「直射光Ａ」ともいう）を灯具前方へ向けて全反射させるようになっている。 Each of the plurality of incidence control elements 34S totally reflects the reflected light B from the central region 32 toward the front of the lamp in the outer region 34S2B of the second reflecting surface 34S2, and In the peripheral region 34S2A, the light from the light emitting element 22 incident from the second incident surface 34S1 (hereinafter also simply referred to as "direct light A") is totally reflected toward the front of the lamp.
　図５は図４のＶ部詳細図であって、図５（ａ）は中心領域３２からの反射光Ｂの光路を示す図であり、図５（ｂ）は発光素子２２からの直射光Ａの光路を示す図であり、図５（ｃ）はこれらを同時に示す図である。 5A and 5B are detailed views of the V portion in FIG. , and FIG. 5(c) is a diagram showing them at the same time.
　図５（ａ）に示すように、中心領域３２からの反射光Ｂは、略平行光として第２反射面３４Ｓ２の外周側領域３４Ｓ２Ｂに到達し、この外周側領域３４Ｓ２Ｂで全反射した後も略平行光として灯具前方へ向かう。その際、この外周側領域３４Ｓ２Ｂからの全反射光が灯具正面方向に対して僅かに内周側に傾斜した方向へ向かう光となるように、外周側領域３４Ｓ２Ｂの傾斜角度が設定されている。 As shown in FIG. 5(a), the reflected light B from the central region 32 reaches the outer peripheral region 34S2B of the second reflecting surface 34S2 as substantially parallel light, and is substantially It goes to the front of the lamp as parallel light. At this time, the inclination angle of the outer peripheral region 34S2B is set so that the totally reflected light from the outer peripheral region 34S2B is light directed in a direction slightly inclined inwardly with respect to the front direction of the lamp.
　一方、図５（ｂ）に示すように、発光素子２２からの直射光Ａは、平行光よりも僅かに拡がる光として第２入射面３４Ｓ１に到達した後、この第２入射面３４Ｓ１から平行光よりも僅かに拡がる光として第２反射面３４Ｓ２の内周側領域３４Ｓ２Ａに到達し、この内周側領域３４Ｓ２Ａで全反射した後も平行光よりも僅かに拡がる光として灯具前方へ向かう。その際、この内周側領域３４Ｓ２Ａからの全反射光が灯具正面方向に対して僅かに内周側に傾斜した方向へ向かう光となるように、内周側領域３４Ｓ２Ａの傾斜角度が設定されている。 On the other hand, as shown in FIG. 5B, the direct light A from the light emitting element 22 reaches the second incident surface 34S1 as light that spreads slightly more than the parallel light, and then the parallel light from the second incident surface 34S1. It reaches the inner peripheral side area 34S2A of the second reflecting surface 34S2 as light that spreads slightly more than the parallel light, and even after being totally reflected by this inner peripheral side area 34S2A, it travels toward the front of the lamp as light that spreads slightly more than parallel light. At that time, the inclination angle of the inner circumference side area 34S2A is set so that the total reflected light from the inner circumference side area 34S2A is light directed in a direction slightly inclined to the inner circumference side with respect to the front direction of the lamp. there is
　ただし、入射制御素子３４Ｓの後端部３４Ｓａに到達した直射光Ａは、第２入射面３４Ｓ１から入射した後に一旦収束してから拡散光として第２反射面３４Ｓ２の内周側領域３４Ｓ２Ａに到達するので、この内周側領域３４Ｓ２Ａで全反射した後、拡散光として灯具前方へ向かう。 However, the direct light A that has reached the rear end portion 34Sa of the incidence control element 34S enters from the second incident surface 34S1, converges once, and then reaches the inner peripheral side area 34S2A of the second reflecting surface 34S2 as diffused light. Therefore, after being totally reflected by the inner circumference side region 34S2A, the light travels forward of the lamp as diffused light.
　したがって、内周側領域３４Ｓ２Ａ全体からの全反射光としては、灯具正面方向に対して僅かに内周側に傾斜した方向へ向かう略平行光と、灯具正面方向に対して内周側および外周側に拡がる拡散光とが混ざり合ったものとなる。 Therefore, the total reflected light from the entire inner peripheral side area 34S2A includes substantially parallel light directed in a direction slightly inclined to the inner peripheral side with respect to the front direction of the lamp, and It is mixed with the diffused light that spreads out.
　図５（ｃ）に示すように、第２反射面３４Ｓ２全体からの全反射光としては、外周側領域３４Ｓ２Ｂから略平行光として灯具正面方向に近い方向へ向かう反射光Ｂ由来の光と、内周側領域３４Ｓ２Ａから略平行光および拡散光として灯具正面方向に近い方向へ向かう直射光Ａ由来の光とが混ざり合ったものとなる。 As shown in FIG. 5C, the total reflected light from the entire second reflecting surface 34S2 includes light originating from the reflected light B that travels in a direction close to the front direction of the lamp from the outer peripheral side region 34S2B as substantially parallel light, and light derived from the inner light. Light derived from direct light A that travels in a direction close to the front direction of the lamp as substantially parallel light and diffused light from the circumferential side area 34S2A is mixed.
　図６は、発光素子２２からの出射光に対して導光体３０の周辺領域３４で行われる配光制御の様子を示す側断面図である。その際、図６（ａ）は中心領域３２からの反射光Ｂに対する配光制御の様子を示す図であり、図６（ｂ）は発光素子２２からの直射光Ａに対する配光制御の様子を示す図であり、図６（ｃ）はこれらを同時に示す図である。 FIG. 6 is a side cross-sectional view showing how light distribution is controlled in the peripheral region 34 of the light guide 30 with respect to the light emitted from the light emitting element 22. FIG. At that time, FIG. 6(a) is a diagram showing how the light distribution is controlled with respect to the reflected light B from the central region 32, and FIG. FIG. 6(c) is a diagram showing them at the same time.
　図６（ａ）に示すように、中心領域３２からの反射光Ｂは、複数の入射制御素子３４Ｓの第２反射面３４Ｓ２で全反射した後、灯具正面方向に対して僅かに内周寄りの方向へ向かう略平行光として周辺領域３４の前面に到達する。そして、出射制御素子３４Ｅ１の形成領域に到達した光は、出射制御素子３４Ｅ１により基準軸線Ａｘ寄りの方向へ僅かに偏向する略平行光として灯具前方へ向けて出射し、その外周側に位置する出射制御素子３４Ｅ２の形成領域に到達した光は、出射制御素子３４Ｅ２により基準軸線Ａｘ寄りの方向へ比較的大きく偏向する略平行光として灯具前方へ向けて出射する。 As shown in FIG. 6(a), the reflected light B from the central region 32 is totally reflected by the second reflecting surfaces 34S2 of the plurality of incident control elements 34S, and then is reflected slightly toward the inner periphery with respect to the front direction of the lamp. It reaches the front surface of the peripheral area 34 as substantially parallel light directed in a direction. Then, the light reaching the formation area of the emission control element 34E1 is emitted toward the front of the lamp as substantially parallel light that is slightly deflected toward the reference axis Ax by the emission control element 34E1. The light that has reached the formation area of the control element 34E2 is emitted toward the front of the lamp as substantially parallel light that is relatively largely deflected toward the reference axis Ax by the emission control element 34E2.
　一方、図６（ｂ）に示すように、発光素子２２からの直射光Ａは、複数の入射制御素子３４Ｓの第２反射面３４Ｓ２で全反射した後、基準軸線Ａｘ寄りの方向へ僅かに偏向する略平行光と拡散光とが混ざり合った光として周辺領域３４の前面に到達する。そして、出射制御素子３４Ｅ１の形成領域に到達した光は基準軸線Ａｘ寄りの方向へ僅かに偏向した状態で灯具前方へ向けて出射し、出射制御素子３４Ｅ２の形成領域に到達した光は基準軸線Ａｘ寄りの方向へ比較的大きく偏向した状態で灯具前方へ向けて出射する。 On the other hand, as shown in FIG. 6B, the direct light A from the light emitting element 22 is totally reflected by the second reflecting surfaces 34S2 of the plurality of incident control elements 34S, and then slightly deflected toward the reference axis Ax. The light reaches the front surface of the peripheral region 34 as a mixture of approximately parallel light and diffused light. The light that has reached the formation area of the emission control element 34E1 is emitted toward the front of the lamp while being slightly deflected in a direction closer to the reference axis Ax, and the light that has reached the formation area of the emission control element 34E2 is directed toward the reference axis Ax. The light is emitted toward the front of the lamp while being relatively largely deflected in the near direction.
　図６（ｃ）に示すように、第２反射面３４Ｓ２全体からの全反射光としては、外周側領域３４Ｓ２Ｂから略平行光として灯具前方へ向かう反射光Ｂ由来の光と、内周側領域３４Ｓ２Ａから略平行光および拡散光として灯具前方へ向かう直射光Ａ由来の光とが混ざり合ったものとなる。 As shown in FIG. 6(c), the total reflected light from the entire second reflecting surface 34S2 includes the light originating from the reflected light B that travels forward from the outer peripheral side area 34S2B as substantially parallel light toward the front of the lamp, and the inner peripheral side area 34S2A. light derived from the direct light A directed toward the front of the lamp as substantially parallel light and diffused light.
　その際、反射光Ｂ由来の光は、直射光Ａ由来の光よりも明るい光として灯具前方へ向けて出射する。 At that time, the light derived from the reflected light B is emitted toward the front of the lamp as brighter light than the light derived from the direct light A.
　また、反射光Ｂ由来の光も直射光Ａ由来の光も、出射制御素子３４Ｅ２の形成領域から灯具前方へ向けて出射する際には、基準軸線Ａｘ寄りの方向へ比較的大きく偏向するので、これにより導光体３０からの出射光がエクステンションパネル５０によって遮光されてしまうのが未然される（図３参照）。 In addition, both the light derived from the reflected light B and the light derived from the direct light A are relatively greatly deflected toward the reference axis Ax when emitted from the formation area of the emission control element 34E2 toward the front of the lamp. This prevents the light emitted from the light guide 30 from being blocked by the extension panel 50 (see FIG. 3).
　次に、本実施形態の作用効果について説明する。 Next, the effects of this embodiment will be described.
　本実施形態に係る車両用灯具１０は導光体３０を備えているが、この導光体３０は中心領域３２と周辺領域３４とを備えており、その周辺領域３４の後面には光源としての発光素子２２からの直射光を入射制御するための複数の入射制御素子３４Ｓが内周側から外周側へ向けて並んだ状態で形成されており、かつ、複数の入射制御素子３４Ｓの各々は、発光素子２２からの直射光を入射させる第２入射面３４Ｓ１と、この第２入射面３４Ｓ１から入射した発光素子２２からの光を灯具前方へ向けて全反射させる第２反射面３４Ｓ２とを備えているので、発光素子２２から灯具前方へ向けて出射する光を広範囲にわたって前方照射光として利用することができる。 The vehicle lamp 10 according to this embodiment includes a light guide body 30. The light guide body 30 has a central region 32 and a peripheral region 34, and a rear surface of the peripheral region 34 serves as a light source. A plurality of incidence control elements 34S for controlling the incidence of direct light from the light emitting element 22 are arranged in a row from the inner peripheral side to the outer peripheral side, and each of the plurality of incidence control elements 34S Equipped with a second incident surface 34S1 for receiving direct light from the light emitting element 22 and a second reflecting surface 34S2 for totally reflecting the light from the light emitting element 22 incident from the second incident surface 34S1 toward the front of the lamp. Therefore, the light emitted from the light emitting element 22 toward the front of the lamp can be used over a wide range as forward illumination light.
　その上で、導光体３０の中心領域３２は、発光素子２２からの直射光を入射させる第１入射面３２ａと、この第１入射面３２ａから入射した発光素子２２からの光を周辺領域３４へ向けて全反射させる第１反射面３２Ｂａとを備えており、かつ、複数の入射制御素子３４Ｓの各々は、中心領域３２の第１反射面３２Ｂａで全反射した発光素子２２からの光が第２反射面３４Ｓ２に入射し得る位置に配置されているので、中心領域３２の第１反射面３２Ｂａで全反射した発光素子２２からの光についても、これを周辺領域３４からの前方照射光として利用することができる。 In addition, the central region 32 of the light guide 30 has a first incident surface 32a on which direct light from the light emitting element 22 is incident, and a peripheral region 34 on which the light from the light emitting element 22 incident from the first incident surface 32a is received. Each of the plurality of incident control elements 34S is provided with a first reflecting surface 32Ba that is totally reflected toward the center region 32, and each of the plurality of incident control elements 34S receives light from the light emitting element 22 that is totally reflected by the first reflecting surface 32Ba of the central region 32. Since it is arranged at a position where it can be incident on the second reflecting surface 34S2, the light from the light emitting element 22 that is totally reflected by the first reflecting surface 32Ba of the central region 32 is also used as forward irradiation light from the peripheral region 34. can do.
　そして、このように発光素子２２から導光体３０の中心領域３２へ向かう明るい光を周辺領域３４へ振り向けることにより、周辺領域３４からの前方照射光を大幅に増大させることができ、これにより導光体３０がその外周縁部まで明るく光って見えるようにすることができる。 By directing the bright light from the light emitting element 22 toward the central region 32 of the light guide 30 to the peripheral region 34 in this way, the forward illumination light from the peripheral region 34 can be greatly increased. It is possible to make the light guide 30 appear to shine brightly up to its outer peripheral edge.
　このように本実施形態によれば、発光素子２２からの出射光を、導光体３０を介して灯具前方へ向けて照射するように構成された車両用灯具１０において、導光体３０がその外周縁部まで明るく光って見えるようにすることができる。 As described above, according to the present embodiment, in the vehicle lamp 10 configured to irradiate the light emitted from the light emitting element 22 toward the front of the lamp via the light guide 30, the light guide 30 It is possible to make even the outer peripheral edge appear to shine brightly.
　特に本実施形態においては、複数の入射制御素子３４Ｓの各々の構成として、その第２反射面３４Ｓ２が灯具前方へ向けて外周側に傾斜した傾斜面で構成されたものとした上で、この第２反射面３４Ｓ２の外周側領域３４Ｓ２Ｂが内周側領域３４Ｓ２Ａよりも大きい傾斜角度で形成されたものとなっているので、次のような作用効果を得ることができる。 In particular, in this embodiment, each of the plurality of incidence control elements 34S is configured such that the second reflecting surface 34S2 thereof is an inclined surface that is inclined toward the outer periphery toward the front of the lamp. Since the outer peripheral region 34S2B of the second reflecting surface 34S2 is formed with a larger inclination angle than the inner peripheral region 34S2A, the following effects can be obtained.
　すなわち、中心領域３２の第１反射面３２Ｂａで全反射した発光素子２２からの光は、複数の入射制御素子３４Ｓの各々に対して、その第２反射面３４Ｓ２の外周側領域３４Ｓ２Ｂに入射することとなるが、この外周側領域３４Ｓ２Ｂは内周側領域３４Ｓ２Ａよりも大きい傾斜角度で形成されているので、周辺領域３４の第２入射面３４Ｓ１から入射した後に第２反射面３４Ｓ２の内周側領域３４Ｓ２Ａで全反射した発光素子２２からの光と、中心領域３２の第１反射面３２Ｂａで全反射した後に第２反射面３４Ｓ２の外周側領域３４Ｓ２Ｂで全反射した発光素子２２からの光とが、灯具正面方向に近い略同一方向へ向かう光として照射されるようにすることができる。そしてこれにより、灯具正面視において導光体３０の周辺領域３４がその全域にわたって明るく光って見えるようにすることができる。 That is, the light from the light emitting element 22 totally reflected by the first reflecting surface 32Ba of the central region 32 is incident on the outer peripheral region 34S2B of the second reflecting surface 34S2 of each of the plurality of incidence control elements 34S. However, since the outer peripheral region 34S2B is formed with a larger inclination angle than the inner peripheral region 34S2A, the light enters from the second incident surface 34S1 of the peripheral region 34 and then enters the inner peripheral region of the second reflecting surface 34S2. The light from the light emitting element 22 totally reflected by 34S2A and the light from the light emitting element 22 totally reflected by the outer peripheral side area 34S2B of the second reflecting surface 34S2 after being totally reflected by the first reflecting surface 32Ba of the central area 32 are It is possible to irradiate the light as light directed in substantially the same direction close to the front direction of the lamp. As a result, the peripheral area 34 of the light guide 30 can be made to appear to shine brightly over its entire area when viewed from the front of the lamp.
　また本実施形態においては、複数の入射制御素子３４Ｓが、周辺領域３４の内周側から外周側へ向けて灯具前方側に徐々に変位した状態で配置されているので、中心領域３２の第１反射面３２Ｂａで全反射した発光素子２２からの光を効率良く第２反射面３４Ｓ２に入射させることができる。 In addition, in this embodiment, the plurality of incident control elements 34S are arranged in a state of being gradually displaced toward the front side of the lamp from the inner peripheral side toward the outer peripheral side of the peripheral region 34. The light from the light emitting element 22 totally reflected by the reflecting surface 32Ba can be efficiently made incident on the second reflecting surface 34S2.
　さらに本実施形態においては、周辺領域３４の前面に、複数の入射制御素子３４Ｓの第２反射面３４Ｓ２で全反射した発光素子２２からの光を出射制御するための複数の出射制御素子３４Ｅ１、３４Ｅ２が、周辺領域３４の内周側から外周側へ向けて並んだ状態で形成されているので、導光体３０による配光制御を精度良く行うことができる。しかも、複数の出射制御素子３４Ｅ１、３４Ｅ２は、第２反射面３４Ｓ２で全反射した発光素子２２からの光を中心領域３２寄りの方向へ偏向出射させるように構成されており、その際、周辺領域３４の外周縁部に位置する出射制御素子３４Ｅ２は、第２反射面３４Ｓ２で全反射した発光素子２２からの光を中心領域３２寄りの方向へ大きく偏向出射させるように構成されているので、導光体３０の周辺にエクステンションパネル５０が灯具構成部材として配置されているにもかかわらず、このエクステンションパネル５０によって周辺領域３４からの前方照射光が不用意に遮られてしまうのを未然に防止することができる。 Furthermore, in the present embodiment, a plurality of emission control elements 34E1 and 34E2 for controlling the emission of light from the light emitting elements 22 totally reflected by the second reflecting surfaces 34S2 of the plurality of incidence control elements 34S are provided on the front surface of the peripheral region 34. are formed in a state of being aligned from the inner peripheral side to the outer peripheral side of the peripheral region 34, the light distribution control by the light guide 30 can be performed with high accuracy. Moreover, the plurality of emission control elements 34E1 and 34E2 are configured to deflect and emit the light from the light emitting element 22, which is totally reflected by the second reflecting surface 34S2, toward the central region 32. The emission control element 34E2 positioned at the outer peripheral edge of the 34 is configured to largely deflect the light emitted from the light emitting element 22 and totally reflected by the second reflecting surface 34S2 toward the central region 32. To prevent the extension panel 50 from inadvertently blocking forward irradiation light from a peripheral area 34 even though the extension panel 50 is arranged as a lamp component around the light body 30. - 特許庁be able to.
　しかも、複数の出射制御素子３４Ｅ１、３４Ｅ２の各々は、第２反射面３４Ｓ２で全反射した発光素子２２からの光を基準軸線Ａｘに関して周方向に拡散する光として出射させるように構成されているので、灯具正面視の場合のみならず灯具正面方向から多少傾斜した方向から観察した場合においても、導光体３０の周辺領域３４がその全域にわたって均一に光って見えるようにすることができる。 Moreover, each of the plurality of emission control elements 34E1 and 34E2 is configured to emit the light from the light emitting element 22 that has been totally reflected by the second reflecting surface 34S2 as light diffused in the circumferential direction with respect to the reference axis Ax. The peripheral area 34 of the light guide 30 can be made to appear to shine uniformly over its entire area not only when viewed from the front of the lamp but also when observed from a direction slightly inclined from the front of the lamp.
　また、本実施形態に係る車両用灯具１０においては、発光素子２２がその発光面２２ａを灯具前方へ向けた状態で配置されており、このため発光素子２２からの出射光の配光分布は、発光面２２ａの略面直方向に位置する導光体３０の中心領域３２への出射光の強度が大きくなる反面、導光体３０の周辺領域３４へ向かう出射光の強度は大幅に小さくなるので、本実施形態のように中心領域３２の第１反射面３２Ｂａで全反射した発光素子２２からの光を周辺領域３４からの前方照射光として利用する構成を採用することが特に効果的である。 In addition, in the vehicle lamp 10 according to the present embodiment, the light emitting element 22 is arranged with its light emitting surface 22a facing forward. The intensity of the emitted light toward the central region 32 of the light guide 30 located substantially perpendicular to the light emitting surface 22a increases, while the intensity of the emitted light toward the peripheral region 34 of the light guide 30 decreases significantly. It is particularly effective to employ the configuration in which the light from the light emitting element 22 totally reflected by the first reflecting surface 32Ba of the central region 32 as in this embodiment is used as the forward illumination light from the peripheral region 34 .
　さらに本実施形態に係る車両用灯具１０においては、その光源が光源ユニット２０の発光素子２２で構成されているので、光源光束のバラツキがあっても光源ユニット２０を交換することにより適正な光源光束を確保することが可能である。その一方で、本実施形態のように光源ユニット２０が灯室内に収容されている場合には、その交換ができない灯具構成となる場合もあり、このような場合には光源光束のバラツキによって配光のバラツキも発生しやすくなってしまう。しかしながら本実施形態のように、発光素子２２から導光体３０の中心領域３２へ向かう明るい光を周辺領域３４へ振り向けることによって周辺領域３４からの前方照射光を大幅に増大させる構成とすれば、光源光束に多少のバラツキがあっても導光体３０がその外周縁部まで明るく光って見えるようにすることが可能となる。 Further, in the vehicle lamp 10 according to the present embodiment, the light source is composed of the light emitting elements 22 of the light source unit 20. Therefore, even if there is variation in the light source luminous flux, the proper light source luminous flux can be obtained by exchanging the light source unit 20. It is possible to ensure On the other hand, when the light source unit 20 is housed in the lamp chamber as in the present embodiment, there may be a case where the lamp configuration is such that it cannot be replaced. It is easy to cause the variation of . However, if, as in the present embodiment, bright light directed from the light emitting element 22 toward the central region 32 of the light guide 30 is directed to the peripheral region 34, the forward irradiation light from the peripheral region 34 is greatly increased. Thus, even if there is some variation in the light flux of the light source, it is possible to make the light guide 30 appear to shine brightly even at its outer peripheral edge.
　上記実施形態においては、導光体３０の周辺領域３４が横長矩形状の外形形状を有しているものとして説明したが、これ以外の外形形状（例えば楕円形や平行四辺形等の外形形状）を有する構成とすることも可能である。 In the above embodiment, the peripheral region 34 of the light guide 30 has been described as having a horizontally long rectangular outer shape, but other outer shapes (for example, elliptical, parallelogram, etc.) may be used. It is also possible to have a configuration with
　上記実施形態においては、複数の入射制御素子３４Ｓが同心円状に形成されているものとして説明したが、内周側から外周側へ向けて並んだ状態で形成されていれば、これ以外の配置（例えば縦縞状や格子状等の配置）で形成された構成とすることも可能である。 In the above embodiment, the plurality of incident control elements 34S are formed concentrically, but other arrangements ( For example, it is also possible to adopt a configuration formed in a vertical striped pattern or a lattice pattern.
　上記実施形態においては、光源ユニット２０が、単一の発光素子２２を備えているものとして説明したが、複数の発光素子２２を備えた構成とすることも可能である。 In the above embodiment, the light source unit 20 has been described as having a single light emitting element 22, but a configuration having a plurality of light emitting elements 22 is also possible.
　上記実施形態においては、光源ユニット２０が、灯室内に配置されたホルダーパネル４０に支持されているものとして説明したが、それ以外の灯具構成部材（例えばランプボディ１２等）に支持された構成とすることも可能である。 In the above embodiment, the light source unit 20 has been described as being supported by the holder panel 40 arranged in the lamp chamber. It is also possible to
　上記実施形態においては、導光体３０の周辺にエクステンションパネル５０が配置されているものとして説明したが、これ以外の灯具構成部材（例えばインナーレンズのフランジ部等）が配置された構成とすることも可能であり、このような構成を採用した場合においても、この灯具構成部材によって周辺領域３４からの前方照射光が不用意に遮られたり迷光が発生してしまうのを未然に防止することができる。 In the above embodiment, the extension panel 50 is arranged around the light guide 30. However, other lamp components (for example, the flange portion of the inner lens) may be arranged. Even when such a configuration is adopted, it is possible to prevent the light from the peripheral area 34 from being inadvertently blocked or the stray light from being generated. can.
　上記実施形態においては、車両用灯具１０が、車両前部に設けられるフロントターンシグナルランプである場合について説明したが、車両に設けられる箇所や機能にかかわらず、上記実施形態と同様の構成を採用することにより上記実施形態と同様の作用効果を得ることができる。例えば、車両用灯具１０として、フロントターンシグナルランプ以外にも、テールランプ、ストップランプ、デイタイムランニングランプ、クリアランスランプ等が採用可能である。その際、これら各灯具の機能に合わせて、アンバー色の発光ダイオードの他にも、赤色や白色の発光ダイオード等を使用することが可能である。 In the above embodiment, the case where the vehicle lamp 10 is a front turn signal lamp provided in the front part of the vehicle has been described. By doing so, it is possible to obtain the same effects as those of the above-described embodiment. For example, as the vehicle lamp 10, a tail lamp, a stop lamp, a daytime running lamp, a clearance lamp, etc. can be employed in addition to the front turn signal lamp. In this case, it is possible to use red or white light-emitting diodes or the like in addition to amber light-emitting diodes in accordance with the functions of these lamps.
　次に、上記実施形態の変形例について説明する。 Next, a modification of the above embodiment will be described.
　まず、上記実施形態の第１変形例について説明する。 First, a first modified example of the above embodiment will be described.
　図７は、本変形例に係る導光体１３０の要部を示す、図５と同様の図である。 FIG. 7 is a view similar to FIG. 5, showing the main part of the light guide 130 according to this modified example.
　図７に示すように、本変形例の導光体１３０も、その基本的な構成は上記実施形態の場合と同様であるが、その周辺領域１３４の後面に形成された複数の入射制御素子１３４Ｓの構成が上記実施形態の場合と一部異なっている。 As shown in FIG. 7, the light guide 130 of this modified example also has the same basic configuration as that of the above-described embodiment, but a plurality of incident control elements 134S are formed on the rear surface of the peripheral region 134 thereof. is partly different from that of the above embodiment.
　すなわち本変形例においても、複数の入射制御素子１３４Ｓは、周辺領域１３４の内周側から外周側へ向けて並んだ状態で形成されており、かつ、これら複数の入射制御素子１３４Ｓの各々は、発光素子（図示せず）からの直射光Ａを入射させる第２入射面１３４Ｓ１と、この第２入射面１３４Ｓ１から入射した直射光Ａと中心領域（図示せず）からの反射光Ｂとを灯具前方へ向けて全反射させる第２反射面１３４Ｓ２とを備えた構成となっているが、その第２反射面１３４Ｓ２の断面形状が上記実施形態の場合と異なっている。 That is, also in this modification, the plurality of incidence control elements 134S are formed in a state of being aligned from the inner peripheral side to the outer peripheral side of the peripheral region 134, and each of the plurality of incidence control elements 134S A second incident surface 134S1 that receives direct light A from a light-emitting element (not shown), and a lamp that receives the direct light A incident from the second incident surface 134S1 and reflected light B from a central region (not shown). Although the configuration includes a second reflecting surface 134S2 that totally reflects light toward the front, the cross-sectional shape of the second reflecting surface 134S2 is different from that of the above-described embodiment.
　具体的には、本変形例の第２反射面１３４Ｓ２においても、その外周側領域１３４Ｓ２Ｂは内周側領域１３４Ｓ２Ａよりも大きい傾斜角度で形成されているが、外周側領域１３４Ｓ２Ｂと内周側領域１３４Ｓ２Ａとが連続的な凹曲線で繋がる断面形状を有している点で上記実施形態の場合と異なっている。 Specifically, in the second reflecting surface 134S2 of this modified example, the outer peripheral region 134S2B is formed with a larger inclination angle than the inner peripheral region 134S2A. is different from the case of the above-described embodiment in that it has a cross-sectional shape that is connected by a continuous concave curve.
　図７（ａ）に示すように、略平行光として第２反射面１３４Ｓ２の外周側領域１３４Ｓ２Ｂに到達した反射光Ｂは、この凹曲線状に形成された外周側領域１３４Ｓ２Ｂで全反射した後、灯具正面方向に対して内周側および外周側に多少拡散する光として灯具前方へ向かう。 As shown in FIG. 7A, the reflected light B that reaches the outer peripheral region 134S2B of the second reflecting surface 134S2 as substantially parallel light is totally reflected by the outer peripheral region 134S2B formed in the concave curve shape, and then The light is directed toward the front of the lamp as light that is slightly diffused toward the inner and outer circumferences with respect to the front direction of the lamp.
　一方、図７（ｂ）に示すように、平行光よりも僅かに拡がる光として第２入射面１３４Ｓ１に到達した直射光Ａは、この第２入射面１３４Ｓ１から平行光よりも僅かに拡がる光として第２反射面１３４Ｓ２の内周側領域１３４Ｓ２Ａに到達し、この凹曲線状に形成された内周側領域１３４Ｓ２Ａで全反射した後、灯具正面方向に対して内周側および外周側に比較的大きく拡散する光として灯具前方へ向かう。また、入射制御素子１３４Ｓの後端部１３４Ｓａに到達した直射光Ａは、第２入射面１３４Ｓ１から入射した後に一旦収束してから拡散光として第２反射面１３４Ｓ２の内周側領域１３４Ｓ２Ａに到達し、この凹曲線状に形成された内周側領域１３４Ｓ２Ａで全反射した後、灯具正面方向に対して内周側および外周側に比較的大きく拡散する光として灯具前方へ向かう。 On the other hand, as shown in FIG. 7B, the direct light A that reaches the second incident surface 134S1 as light that spreads slightly more than the parallel light spreads from the second incident surface 134S1 as light that spreads slightly more than the parallel light. After reaching the inner peripheral side area 134S2A of the second reflecting surface 134S2 and being totally reflected by the inner peripheral side area 134S2A formed in the shape of a concave curve, the light is relatively large toward the inner peripheral side and the outer peripheral side with respect to the front direction of the lamp. It goes to the front of the lamp as diffused light. In addition, the direct light A reaching the rear end portion 134Sa of the incidence control element 134S enters from the second incident surface 134S1, converges once, and then reaches the inner peripheral side area 134S2A of the second reflecting surface 134S2 as diffused light. After being totally reflected by the inner peripheral region 134S2A formed in the shape of a concave curve, the light travels toward the front of the lamp as light that is relatively greatly diffused toward the inner and outer peripheral sides with respect to the front direction of the lamp.
　したがって、内周側領域１３４Ｓ２Ａ全体からの全反射光としても、灯具正面方向に対して内周側および外周側に比較的大きく拡散する光となる。 Therefore, even if the light is totally reflected from the entire inner peripheral side area 134S2A, the light diffuses relatively greatly toward the inner peripheral side and the outer peripheral side with respect to the front direction of the lamp.
　図７（ｃ）に示すように、第２反射面１３４Ｓ２全体からの全反射光としては、外周側領域１３４Ｓ２Ｂから比較的拡がりが小さい拡散光として灯具正面方向に近い方向へ向かう反射光Ｂ由来の光と、内周側領域１３４Ｓ２Ａから比較的拡がりが大きい拡散光として灯具正面方向に近い方向へ向かう直射光Ａ由来の光とが混ざり合ったものとなる。 As shown in FIG. 7C, the total reflected light from the entire second reflecting surface 134S2 is diffused light with a relatively small spread from the outer peripheral side region 134S2B, which is derived from the reflected light B traveling in a direction close to the front direction of the lamp. The light is mixed with the light originating from the direct light A traveling in a direction close to the front of the lamp as diffused light with a relatively large spread from the inner peripheral side area 134S2A.
　その際、反射光Ｂ由来の光は、直射光Ａ由来の光よりも明るい光として灯具前方へ向けて全反射する。 At that time, the light derived from the reflected light B is totally reflected toward the front of the lamp as brighter light than the light derived from the direct light A.
　本変形例の構成を採用した場合においても、上記実施形態と略同様の作用効果を得ることができる。 Even when the configuration of this modified example is adopted, substantially the same effects as those of the above embodiment can be obtained.
　また、本変形例の構成を採用することにより、第２反射面１３４Ｓ２全体からの全反射光を、上記実施形態の場合よりも内周側および外周側への拡がりが大きい光とすることができるので、灯具正面視の場合のみならず灯具正面方向から多少傾斜した方向から観察した場合においても、導光体１３０の周辺領域１３４がその全域にわたって均一に光って見えるようにする効果を高めることができる。 Further, by adopting the configuration of this modified example, the total reflected light from the entire second reflecting surface 134S2 can be light that spreads to the inner peripheral side and the outer peripheral side more than in the case of the above embodiment. Therefore, not only when viewed from the front of the lamp but also when observed from a direction slightly inclined from the front of the lamp, the effect of making the peripheral region 134 of the light guide 130 appear to shine uniformly over the entire area can be enhanced. can.
　次に、上記実施形態の第２変形例について説明する。 Next, a second modified example of the above embodiment will be described.
　図８は、本変形例に係る導光体２３０の要部を示す、図５と同様の図である。 FIG. 8 is a view similar to FIG. 5, showing the main part of the light guide 230 according to this modified example.
　図８に示すように、本変形例の導光体２３０も、その基本的な構成は上記実施形態の場合と同様であるが、その周辺領域２３４の後面に形成された複数の入射制御素子２３４Ｓの構成が上記実施形態の場合と一部異なっている。 As shown in FIG. 8, the light guide 230 of this modified example has the same basic configuration as that of the above embodiment, but a plurality of incident control elements 234S are formed on the rear surface of the peripheral region 234. As shown in FIG. is partly different from that of the above embodiment.
　すなわち本変形例においても、複数の入射制御素子２３４Ｓは、周辺領域２３４の内周側から外周側へ向けて並んだ状態で形成されており、かつ、これら複数の入射制御素子２３４Ｓの各々は、発光素子（図示せず）からの直射光Ａを入射させる第２入射面２３４Ｓ１と、この第２入射面２３４Ｓ１から入射した直射光Ａと中心領域（図示せず）からの反射光Ｂとを灯具前方へ向けて全反射させる第２反射面２３４Ｓ２とを備えた構成となっているが、その第２反射面２３４Ｓ２の断面形状が上記実施形態の場合と異なっている。 That is, also in this modification, the plurality of incidence control elements 234S are formed in a state of being aligned from the inner peripheral side to the outer peripheral side of the peripheral region 234, and each of the plurality of incidence control elements 234S A second incident surface 234S1 that receives direct light A from a light-emitting element (not shown), and a lamp that receives the direct light A incident from the second incident surface 234S1 and reflected light B from a central region (not shown). Although the configuration includes a second reflecting surface 234S2 that totally reflects light forward, the cross-sectional shape of the second reflecting surface 234S2 is different from that of the above-described embodiment.
　具体的には、本変形例の第２反射面２３４Ｓ２は、その内周側領域２３４Ｓ２Ａと外周側領域２３４Ｓ２Ｂとが同じ傾斜角度で形成されており、その傾斜角度は上記実施形態の第２反射面３４Ｓ２における外周側領域３４Ｓ２Ｂの傾斜角度と同じ値に設定されている。 Specifically, in the second reflecting surface 234S2 of this modified example, the inner peripheral side region 234S2A and the outer peripheral side region 234S2B are formed with the same inclination angle, and the inclination angle is the same as that of the second reflecting surface of the above-described embodiment. It is set to the same value as the inclination angle of the outer peripheral side region 34S2B in 34S2.
　これに伴い、複数の入射制御素子２３４Ｓの各々は、その後端部２３４Ｓａが上記実施形態の場合よりも小さい丸みでピン角に近い断面形状を有している。 Accordingly, each of the plurality of incidence control elements 234S has a rear end portion 234Sa that is rounder than in the above embodiment and has a cross-sectional shape close to a pin angle.
　図８（ａ）に示すように、略平行光として第２反射面２３４Ｓ２の外周側領域２３４Ｓ２Ｂに到達した反射光Ｂは、上記実施形態の場合と同様、外周側領域２３４Ｓ２Ｂで全反射した後、灯具正面方向に対して僅かに内周側に傾斜した方向へ向かう略平行光となる。 As shown in FIG. 8A, the reflected light B that has reached the outer peripheral region 234S2B of the second reflecting surface 234S2 as substantially parallel light is totally reflected by the outer peripheral region 234S2B as in the above embodiment, and then It becomes substantially parallel light in a direction slightly inclined toward the inner peripheral side with respect to the front direction of the lamp.
　一方、図８（ｂ）に示すように、平行光よりも僅かに拡がる光として第２入射面２３４Ｓ１に到達した直射光Ａは、この第２入射面２３４Ｓ１から平行光よりも僅かに拡がる光として第２反射面２３４Ｓ２の内周側領域２３４Ｓ２Ａおよび外周側領域２３４Ｓ２Ｂに到達し、この第２反射面２３４Ｓ２で全反射した後、灯具正面方向に対して外周側に大きく傾斜した方向へ向かう略平行光となる。また、入射制御素子２３４Ｓの後端部２３４Ｓａに到達した直射光Ａは、第２入射面２３４Ｓ１から入射した後に一旦収束してから拡散光として第２反射面２３４Ｓ２の内周側領域２３４Ｓ２Ａおよび外周側領域２３４Ｓ２Ｂに到達し、この２反射面２３４Ｓ２で全反射した後、灯具正面方向に対して外周側に大きく傾斜した方向へ向かう拡散光となる。 On the other hand, as shown in FIG. 8B, the direct light A that reaches the second incident surface 234S1 as light that spreads slightly more than the parallel light spreads from the second incident surface 234S1 as light that spreads slightly more than the parallel light. Approximately parallel light that reaches the inner peripheral side area 234S2A and the outer peripheral side area 234S2B of the second reflecting surface 234S2, is totally reflected by the second reflecting surface 234S2, and travels in a direction greatly inclined to the outer peripheral side with respect to the front direction of the lamp. becomes. In addition, the direct light A reaching the rear end portion 234Sa of the incidence control element 234S enters from the second incident surface 234S1, is once converged, and then spreads as diffused light toward the inner peripheral side area 234S2A and the outer peripheral side of the second reflecting surface 234S2. After reaching the region 234S2B and being totally reflected by the two reflecting surfaces 234S2, it becomes diffused light traveling in a direction greatly inclined toward the outer periphery with respect to the front direction of the lamp.
　図８（ｃ）に示すように、第２反射面２３４Ｓ２全体からの全反射光としては、外周側領域２３４Ｓ２Ｂから比較的拡がりが小さい拡散光として灯具正面方向に近い方向へ向かう反射光Ｂ由来の光と、内周側領域２３４Ｓ２Ａおよび外周側領域２３４Ｓ２Ｂから略平行光および拡散光として灯具正面方向に対して外周側に大きく傾斜した方向へ向かう直射光Ａ由来の光とが混ざり合ったものとなる。 As shown in FIG. 8(c), the total reflected light from the entire second reflecting surface 234S2 is diffused light with a relatively small spread from the outer peripheral side region 234S2B, which originates from the reflected light B traveling in a direction close to the front direction of the lamp. The light is mixed with the light derived from the direct light A that travels in a direction greatly inclined to the outer peripheral side with respect to the front direction of the lamp as substantially parallel light and diffused light from the inner peripheral side area 234S2A and the outer peripheral side area 234S2B. .
　その際、反射光Ｂ由来の光は、直射光Ａ由来の光よりも明るい光として灯具前方へ向けて全反射する。 At that time, the light derived from the reflected light B is totally reflected toward the front of the lamp as brighter light than the light derived from the direct light A.
　本変形例の構成を採用した場合においても、上記実施形態と略同様の作用効果を得ることができる。 Even when the configuration of this modified example is adopted, substantially the same effects as those of the above embodiment can be obtained.
　また本変形例においては、反射光Ｂ由来の明るい光によって、周辺領域３４が一定程度の明るさで光って見えるようにした上で、直射光Ａ由来の光によって、灯具正面方向から大きく傾斜した方向からも周辺領域３４が光って見えるようにすることができる。 In addition, in this modified example, the bright light originating from the reflected light B makes the peripheral region 34 appear to shine with a certain degree of brightness, and then the light originating from the direct light A greatly tilts from the front direction of the lamp. The peripheral region 34 can also be made to appear shiny from any direction.
　なお、上記実施形態およびその変形例において諸元として示した数値は一例にすぎず、これらを適宜異なる値に設定してもよいことはもちろんである。 It should be noted that the numerical values shown as specifications in the above embodiment and its modification are merely examples, and it goes without saying that these may be set to different values as appropriate.
　また、本願発明は、上記実施形態およびその変形例に記載された構成に限定されるものではなく、これ以外の種々の変更を加えた構成が採用可能である。 In addition, the present invention is not limited to the configurations described in the above embodiments and their modifications, and configurations with various other modifications can be adopted.
　本国際出願は、２０２２年２月２１日に出願された日本国特許出願である特願２０２２－０２５１１２号に基づく優先権を主張するものであり、当該日本国特許出願である特願２０２２－０２５１１２号の全内容は、本国際出願に援用される。 This international application claims priority based on Japanese Patent Application No. 2022-025112, which is a Japanese patent application filed on February 21, 2022. The entire contents of this International Application are incorporated by reference.
　本発明の特定の実施の形態についての上記説明は、例示を目的として提示したものである。それらは、網羅的であったり、記載した形態そのままに本発明を制限したりすることを意図したものではない。数多くの変形や変更が、上記の記載内容に照らして可能であることは当業者に自明である。 The foregoing descriptions of specific embodiments of the invention have been presented for purposes of illustration. They are not intended to be exhaustive or to limit the invention to the precise forms described. Those skilled in the art will appreciate that many variations and modifications are possible in light of the above description.
　１０　車両用灯具
　１２　ランプボディ
　１４　透光カバー
　２０　光源ユニット
　２２　発光素子（光源）
　２２ａ　発光面
　２４　基板
　２６　プラグ
　２６ａ　放熱フィン
　２８　パッキン
　３０、１３０、２３０　導光体
　３２　中心領域
　３２ａ　第１入射面
　３２Ａ　透過制御部
　３２Ａａ　第１出射面
　３２Ｂ　反射制御部
　３２Ｂａ　第１反射面
　３４、１３４、２３４　周辺領域
　３４Ｅ１、３４Ｅ２　出射制御素子
　３４Ｓ、１３４Ｓ、２３４Ｓ　入射制御素子
　３４Ｓａ、１３４Ｓａ、２３４Ｓａ　後端部
　３４Ｓ１、１３４Ｓ１、２３４Ｓ１　第２入射面
　３４Ｓ２、１３４Ｓ２、２３４Ｓ２　第２反射面
　３４Ｓ２Ａ、１３４Ｓ２Ａ、２３４Ｓ２Ａ　内周側領域
　３４Ｓ２Ｂ、１３４Ｓ２Ｂ、２３４Ｓ２Ｂ　外周側領域
　３６　外周壁部
　４０　ホルダーパネル
　４０ａ　光源支持孔
　５０　エクステンションパネル
　５０ａ　開口部
　Ａ　直射光
　Ａｘ　基準軸線
　Ｂ　反射光 REFERENCE SIGNS LIST 10 Vehicle lamp 12 Lamp body 14 Translucent cover 20 Light source unit 22 Light emitting element (light source)
22a light emitting surface 24 substrate 26 plug 26a heat radiation fin 28 packing 30, 130, 230 light guide 32 central region 32a first incidence surface 32A transmission control section 32Aa first emission surface 32B reflection control section 32Ba first reflection surface 34, 134, 234 Peripheral area 34E1, 34E2 Output control element 34S, 134S, 234S Incidence control element 34Sa, 134Sa, 234Sa Rear end 34S1, 134S1, 234S1 Second incidence surface 34S2, 134S2, 234S2 Second reflection surface 34S2A, 134S2A, 234S2 A inner circumference Side area 34S2B, 134S2B, 234S2B Outer peripheral area 36 Outer peripheral wall 40 Holder panel 40a Light source support hole 50 Extension panel 50a Opening A Direct light Ax Reference axis B Reflected light

Claims (5)

  1. 　光源からの出射光を、導光体を介して灯具前方へ向けて照射するように構成された車両用灯具において、
    　上記導光体は、上記光源の灯具前方に位置する中心領域と、上記中心領域の周囲に位置する周辺領域とを備えており、
    　上記中心領域は、上記光源からの直射光を入射させる第１入射面と、上記第１入射面から入射した上記光源からの光を上記周辺領域へ向けて全反射させる第１反射面とを備えており、
    　上記周辺領域の後面に、上記光源からの直射光を入射制御するための複数の入射制御素子が、上記周辺領域の内周側から外周側へ向けて並んだ状態で形成されており、
    　上記複数の入射制御素子の各々は、上記光源からの直射光を入射させる第２入射面と、上記第２入射面から入射した上記光源からの光を灯具前方へ向けて全反射させる第２反射面とを備えており、
    　上記複数の入射制御素子の各々は、上記第１反射面で全反射した上記光源からの光が上記第２反射面に入射し得る位置に配置されている、ことを特徴とする車両用灯具。     A vehicle lamp configured to emit light emitted from a light source toward the front of the lamp via a light guide,
    The light guide has a central area located in front of the lamp of the light source and a peripheral area located around the central area,
    The central region includes a first incident surface for direct light incident from the light source, and a first reflecting surface for totally reflecting the light from the light source incident from the first incident surface toward the peripheral region. and
    A plurality of incidence control elements for controlling the incidence of direct light from the light source are formed on the rear surface of the peripheral region in a state of being aligned from the inner peripheral side to the outer peripheral side of the peripheral region,
    Each of the plurality of incident control elements has a second incident surface for receiving direct light from the light source, and a second reflection surface for totally reflecting the light from the light source incident from the second incident surface toward the front of the lamp. has a surface and
    A vehicular lamp, wherein each of the plurality of incidence control elements is arranged at a position where light from the light source totally reflected by the first reflecting surface can enter the second reflecting surface.
  2. 　上記第２反射面は、灯具前方へ向けて外周側に傾斜した傾斜面で構成されており、かつ、内周側領域よりも外周側領域の方が大きい傾斜角度で形成されている、ことを特徴とする請求項１記載の車両用灯具。 The second reflecting surface is formed of an inclined surface that is slanted toward the outer circumference toward the front of the lamp, and that the outer circumference side area is formed with a larger inclination angle than the inner circumference side area. 2. The vehicle lamp according to claim 1.
  3. 　上記複数の入射制御素子は、上記周辺領域の内周側から外周側へ向けて灯具前方側に徐々に変位した状態で配置されている、ことを特徴とする請求項１または２記載の車両用灯具。 3. The vehicle according to claim 1, wherein the plurality of incident control elements are arranged in a state of being gradually displaced toward the front side of the lamp from the inner peripheral side toward the outer peripheral side of the peripheral region. lamp.
  4. 　上記周辺領域の前面に、上記複数の入射制御素子の第２反射面で全反射した上記光源からの光を出射制御するための複数の出射制御素子が、上記周辺領域の内周側から外周側へ向けて並んだ状態で形成されており、
    　上記複数の出射制御素子のうち少なくとも上記周辺領域の外周縁部に位置する出射制御素子は、上記第２反射面で全反射した上記光源からの光を上記中心領域寄りの方向へ偏向出射させるように構成されている、ことを特徴とする請求項１または２記載の車両用灯具。     A plurality of emission control elements for controlling the emission of the light from the light source that is totally reflected by the second reflecting surfaces of the plurality of incidence control elements are provided on the front surface of the peripheral area from the inner peripheral side to the outer peripheral side of the peripheral area. It is formed in a state of being lined up towards
    Out of the plurality of emission control elements, at least the emission control elements positioned at the outer peripheral edge of the peripheral region deflect and emit the light from the light source, which has been totally reflected by the second reflecting surface, toward the central region. 3. The vehicular lamp according to claim 1, wherein:
  5. 　上記光源は、発光面を灯具前方へ向けた状態で配置された発光素子で構成されている、ことを特徴とする請求項１または２記載の車両用灯具。 The vehicular lamp according to claim 1 or 2, wherein the light source is composed of a light-emitting element arranged with a light-emitting surface facing forward of the lamp.
PCT/JP2023/005671 2022-02-21 2023-02-17 Vehicle lamp WO2023157944A1 (en)

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JP2022025112A JP2023121655A (en) 2022-02-21 2022-02-21 Vehicular lighting fixture
JP2022-025112 2022-02-21

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012022943A (en) * 2010-07-16 2012-02-02 Stanley Electric Co Ltd Lamp unit
JP2012190572A (en) * 2011-03-09 2012-10-04 Stanley Electric Co Ltd Lamp

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012022943A (en) * 2010-07-16 2012-02-02 Stanley Electric Co Ltd Lamp unit
JP2012190572A (en) * 2011-03-09 2012-10-04 Stanley Electric Co Ltd Lamp

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