WO2021153420A1 - Vehicle lamp - Google Patents
Vehicle lamp Download PDFInfo
- Publication number
- WO2021153420A1 WO2021153420A1 PCT/JP2021/002078 JP2021002078W WO2021153420A1 WO 2021153420 A1 WO2021153420 A1 WO 2021153420A1 JP 2021002078 W JP2021002078 W JP 2021002078W WO 2021153420 A1 WO2021153420 A1 WO 2021153420A1
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- WO
- WIPO (PCT)
- Prior art keywords
- light
- curved surface
- surface portion
- inner lens
- light source
- Prior art date
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Classifications
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- 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
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- 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
- F21S43/30—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by reflectors
- F21S43/31—Optical layout thereof
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- 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
- F21S43/30—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by reflectors
- F21S43/33—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by reflectors characterised by their material, surface treatment or coatings
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- 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
- F21S43/40—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the combination of reflectors and refractors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V5/00—Refractors for light sources
- F21V5/02—Refractors for light sources of prismatic shape
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V5/00—Refractors for light sources
- F21V5/04—Refractors for light sources of lens shape
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- 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
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- 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
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- 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
- F21W2103/35—Brake lights
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- 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
- F21W2105/00—Combinations of lighting devices covered by codes F21W2102/00 – F21W2104/00
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- 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
- F21Y2101/00—Point-like light sources
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- 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 technical field of a vehicle lamp having an inner lens that emits incident light in a predetermined direction.
- an inner lens in which a light source and a Frenel lens step are formed is arranged inside a lamp outer housing composed of a cover and a lamp housing, and light emitted from the light source is incident on the inner lens from an incident surface.
- a type that is controlled by an inner lens and is irradiated from the exit surface to the outside see, for example, Patent Document 1).
- the inner lens has, for example, a Fresnel lens step that controls light on the exit surface.
- the inner lens is formed as a Fresnel lens to reduce the thickness of the inner lens and reduce the size of the vehicle lamp. It becomes possible to plan.
- vehicle lamps are often formed in a shape and size according to the shape and design of the vehicle body, and depending on the shape and size of the lamp outer casing, the inner lens should not interfere with the lamp outer casing. Therefore, the size of the inner lens may be limited.
- the area of the exit surface of the inner lens becomes smaller even if the inner lens is formed as a Fresnel lens to make the inner lens thinner, and the inner lens is directed toward the outside.
- the brightness of the irradiated light may be insufficient, or a sufficient irradiation area of the light may not be secured.
- the object of the vehicle lamp of the present invention is to widen the area of the exit surface of the inner lens to secure sufficient brightness and irradiation area of the light emitted toward the outside.
- the vehicle lamp according to the present invention has a light source that emits light, an incident surface on which the light emitted from the light source is incident, and an emitting surface that emits the incident light.
- the inner lens is provided with a first curved surface portion and a second curved surface portion that are convex in a predetermined direction, respectively, and the first curved surface portion is convex.
- the direction of the second curved surface and the direction of the convexity of the second curved surface portion are different.
- the bending directions of the first curved surface portion and the second curved surface portion of the inner lens on which the Fresnel lens step is formed become different directions, and the inner lens arranged inside the lamp outer casing interferes with the lamp outer casing. It becomes possible to form a shape and size that are difficult to make.
- the first curved surface portion is located above the second curved surface portion, and the direction in which the first curved surface portion becomes convex is the exit surface. It is desirable that the direction in which the light is emitted from the second curved surface portion is set to the direction in which the light is emitted from the second curved surface portion is opposite to the direction in which the light is emitted from the emitting surface.
- the upper and lower ends of the inner lens are less likely to interfere with the outer case of the lamp when the cover of the outer case of the lamp is oriented so that the outer surface faces upward with respect to the vertical surface.
- prism lens steps are formed on a part of the entrance surface and a part of the emission surface, respectively.
- a stepped surface is formed at the boundary between the first curved surface portion and the second curved surface portion.
- the vehicle lighting equipment according to the present invention described above is provided with a light source different from the light source, and has a reflecting portion adjacent to the inner lens to reflect the light emitted from the other light source. It is desirable that a reflector is arranged, an outer surface portion is provided around the reflection portion of the reflector, and a reflection control portion for reflecting a part of light emitted from the emission surface is formed on the outer surface portion.
- the bending directions of the first curved surface portion and the second curved surface portion of the inner lens on which the Fresnel lens step is formed are different, and the inner lens arranged inside the outer casing of the lamp is placed outside the lamp. Since it is possible to form a shape and size that does not easily interfere with the housing, it is possible to widen the area of the exit surface of the inner lens to secure sufficient brightness and irradiation area of the light emitted to the outside. can.
- FIG. 2 to 8 show an embodiment of the vehicle lamp of the present invention, and this figure is a perspective view of the vehicle lamp with the cover separated. It is a vertical cross-sectional view which shows an inner lens and the like. It is a horizontal cross-sectional view which shows the lamp unit and the like. It is a front view of an inner lens. It is an enlarged perspective view which shows a part of an inner lens. It is a figure which shows the path of the light emitted from the 2nd light source in the vertical cross section. It is a figure which shows the path of the light emitted from the 2nd light source and controlled by a prism lens step in a vertical cross section. It is a figure which shows the path of the light emitted from the 2nd light source and controlled by a control step in a horizontal cross section.
- the vehicle lighting tool 1 is attached to both left and right ends of the rear end of the vehicle body, and functions as a vehicle indicator light, for example.
- the vehicle lamp 1 is used, for example, as a combination lamp having the functions of a tail lamp, a stop lamp, and a turn signal lamp.
- front-back, up-down, left-right directions will be described with the light emission direction from the vehicle lamp 1 as the rear.
- the front-back, up-down, left-right directions shown below are for convenience of explanation, and the practice of the present invention is not limited to these directions.
- the vehicle lamp 1 includes a lamp housing 2 having an opening at a position extending from the rear to the side, and a cover 3 for closing the opening of the lamp housing 2 (see FIG. 1).
- the lamp housing 2 and the cover 3 form a lamp outer housing 4, and the internal space of the lamp outer housing 4 is formed as a lamp chamber.
- a first light source and a second light source which will be described later, are attached to the lamp housing 2.
- the outer peripheral portion of the cover 3 is provided as, for example, a light-shielding portion 3a formed of a black material, and the inner portion of the light-shielding portion 3a is provided as a transmission portion 3b capable of transmitting light.
- the light emitted from the first light source and the second light source is transmitted to the outside through the transmitting portion 3b of the cover 3.
- the transmission portion 3b of the cover 3 may be formed with, for example, a diffusion step for diffusing light on the inner surface.
- the transparent portion 3b of the cover 3 is inclined in the vertical direction with the upper end positioned in front of the lower end, so that the outer surface (rear surface) faces upward with respect to the vertical surface.
- a lamp unit 5 is arranged in the lamp room (see FIGS. 1 to 3).
- the lamp unit 5 has a reflector 6, an inner lens 7, a first light source 8, and a second light source 9.
- a light emitting diode LED: Light Emitting Diode
- a so-called LED socket in which a substrate on which the light emitting unit is mounted is attached to a housing.
- the referred configuration may be used.
- the reflector 6 is arranged in a lamp room with a mounted portion (not shown) attached to the lamp housing 2 by screwing or the like, and has a reflecting portion 10 and an outer surface portion 11.
- the reflective portion 10 is formed in a box shape that is opened rearward, and the inner surface is formed as the reflective surface 10a.
- the reflecting portion 10 is formed with an arrangement hole (not shown) for arranging the first light source 8.
- the outer surface portion 11 is provided so as to project forward from the rear end portion of the portion extending from one side portion to the lower portion in the left-right direction of the reflection portion 10, and is located around the reflection portion 10. A part of the outer surface of the outer surface portion 11 is vapor-deposited with a metal such as aluminum, and the portion where the metal is vapor-deposited is formed as the reflection control portion 11a.
- the inner lens 7 is arranged in the lamp chamber in a state where an attached portion (not shown) is attached to the lamp housing 2 by screwing or the like, is arranged along the outer surface portion 11 of the reflector 6, and is located adjacent to the reflector 6. ..
- the inner lens 7 is formed into a plate shape in which each portion is integrally formed of, for example, a transparent resin material, and has an optical control unit 12, a light guide surface portion 13, and a peripheral surface portion 14 (see FIGS. 2 to 5). ..
- the optical control unit 12 is composed of a first curved surface portion 15 and a second curved surface portion 16 which are continuous vertically, and is arranged so that the thickness direction is substantially the front-rear direction.
- the front surface of the optical control unit 12 is formed as an incident surface 17, and the rear surface of the optical control unit 12 is formed as an exit surface 18.
- the first curved surface portion 15 is gently curved to form a substantially spherical shape that is convex rearward
- the second curved surface portion 16 is gently curved to form a substantially spherical surface that is convex forward (FIG. 2). reference). Therefore, the first curved surface portion 15 and the second curved surface portion 16 are continuously provided, and the convex direction of the first curved surface portion 15 and the convex direction of the second curved surface portion 16 are opposite to each other.
- the convex direction of the first curved surface portion 15 and the convex direction of the second curved surface portion 16 are not limited to the opposite directions, and may be different directions.
- Stepped surfaces 19 and 19 are formed at the boundary between the first curved surface portion 15 and the second curved surface portion 16 (see FIG. 5).
- the stepped surfaces 19 and 19 are formed on the left and right sides of the central portion of the optical control unit 12 in the left-right direction.
- the first curved surface portion 15 is formed in a shape extending substantially vertically
- the second curved surface portion 16 is formed in a bent shape so as to be displaced laterally as it goes downward along the outer surface portion 11 of the reflector 6. ing.
- a Fresnel lens step 18a is formed on the exit surface 18 (see FIGS. 2 to 5).
- the Fresnel lens step 18a is formed, for example, as an arc-shaped step centered on a central portion in the left-right direction of the lower end portion of the first curved surface portion 15, and is formed on a portion other than the stepped surfaces 19 and 19. Therefore, the inner lens 7 is formed as a Fresnel lens, and the inner lens 7 is formed as a Fresnel lens to reduce the thickness of the inner lens 7.
- a prism lens step 15a and a prism lens step 15b are formed on both front and rear surfaces of the upper end portion of the first curved surface portion 15, and a part of the Fresnel lens step 18a formed on the exit surface 18 also functions as the prism lens step 15a. do.
- a control step 18b is formed on the exit surface 18 at a part of the lower end portion of the first curved surface portion 15. The control step 18b has a function of emitting light laterally from the exit surface 18.
- the light guide surface portion 13 is continuously provided on the edge of the second curved surface portion 16 on the opposite side of the first curved surface portion 15, and is formed in a shape extending substantially to the left and right.
- a diffusion step 13a is formed on the light guide surface portion 13.
- the peripheral surface portion 14 is continuous with the second curved surface portion 16 and the light guide surface portion 13, and is provided at a position extending from below the second curved surface portion 16 and the light guide surface portion 13 to the side of the light guide surface portion 13.
- a diffusion step 14a is formed on the peripheral surface portion 14.
- the diffusion step 13a of the light guide surface portion 13 and the diffusion step 14a of the peripheral surface portion 14 make it difficult to see the structure existing on the front side of the inner lens 7, and improve the visibility.
- the first light source 8 is attached to the lamp housing 2 and is arranged in a state of being inserted into an arrangement hole formed in the reflection portion 10 of the reflector 6 (see FIG. 3).
- the first light source 8 for example, a halogen lamp, an incandescent lamp, or the like is used. Light as a turn signal lamp is emitted from the first light source 8.
- the second light source 9 is attached to the lamp housing 2, and the light emitting portion 9a is arranged so as to face the incident surface 17 of the inner lens 7.
- a light emitting diode LED: Light Emitting Diode
- the light emitting portion 9a is located on the left and right of the lower end portion of the first curved surface portion 15 at the center position of the Fresnel lens step 18a. It is located in front of the central part in the direction.
- Light as, for example, a tail lamp or a stop lamp is emitted from the second light source 9.
- the inner lens 7 there is a step at the boundary between the first curved surface portion 15 formed in a substantially spherical shape convex rearward and the second curved surface portion 16 formed in a substantially spherical shape convex forward. Since the surfaces 19 and 19 are formed, it becomes easy to form the spherical shape (curved surface shape) of the first curved surface portion 15 and the second curved surface portion 16 by the stepped surfaces 19 and 19, and the molding accuracy of the inner lens 7 is improved. It can be improved.
- the vehicle lamp 1 configured as described above, when light is emitted from the first light source 8, the emitted light is reflected by the reflecting surface 10a of the reflector 6 and transmitted through the transmitting portion 3b of the cover 3. Is irradiated to the outside.
- the emitted light is incident on the inner lens 7 from the incident surface 17 (see FIG. 6).
- the light incident on the lower side of the prism lens step 15a is controlled by the Fresnel lens step 18a to be parallel light, and is transmitted through the transmitting portion 3b of the cover 3 and directed to the outside. Be irradiated.
- the light incident from the prism lens step 15a is controlled by the prism lens step 15a and the prism lens step 15b to be parallel light or light directed upward from parallel to cover 3. It is transmitted to the outside through the transmission portion 3b of the lens (see FIG. 7).
- the prism lens step 15a and the prism lens step 15b are formed on the incident surface 17 and the emitting surface 18 in a part of the inner lens 7, they are emitted from the emitting surface 18 by the prism lens steps 15a and 15b, respectively.
- the degree of freedom in controlling the light is increased, and the light can be irradiated in a desired direction.
- the first curved surface portion 15 is formed in a curved shape that is convex rearward, the light controlled by the Fresnel lens step 18a faces upward from the emission surface 18 at the upper end portion of the first curved surface portion 15.
- the prism lens steps 15a and 15b at the upper end portion of the first curved surface portion 15, the light emitted from the upper end portion of the first curved surface portion 15 becomes parallel light or parallel light. It becomes possible to control the light to be close to the light, and the light can be emitted from the entire first curved surface portion 15 in a desired direction.
- a part of the light incident on the inner lens 7 is guided from the second curved surface portion 16 to the light guide surface portion 13 and the peripheral surface portion 14, and is rearward from the light guide surface portion 13 and the peripheral surface portion 14. It may be emitted diagonally downward.
- the control step 18b a part of the light incident on the inner lens 7 reaches the control step 18b, is controlled by the control step 18b, and is emitted toward the side (see FIG. 8).
- the light controlled by the control step 18b is incident on the reflection control unit 11a formed on the outer surface portion 11 of the reflector 6, and is reflected by the reflection control unit 11a in a predetermined direction.
- the light reflected by the reflection control unit 11a is made to be light that goes substantially laterally and diagonally downward.
- the front side is about 10 degrees and the lower side is about 15 degrees with respect to the left-right direction with respect to the reflection control unit 11a. It is irradiated toward the side of the vehicle in the direction of degree.
- the light emitted from the second light source 9 is emitted from the exit surface 18 of the inner lens 7 and is emitted backward, and is also emitted from the emission surface 18. Since part of the light is emitted sideways, the light is emitted toward a wide area without increasing the number of light sources, and the number of parts is reduced and the structure is simplified before irradiating the light. The area can be expanded to improve visibility.
- a reflector 6 that reflects light emitted from a first light source 8 different from the second light source 9 is arranged adjacent to the inner lens 7, and an outer surface portion 11 of the reflector 6 is arranged.
- a reflection control unit 11a that reflects a part of the light emitted from the exit surface 18 is formed on the surface.
- the formation position of the control step 18b that emits light toward the reflection control unit 11a is a part of the region where the Fresnel lens step 18a is formed on the emission surface 18, it is the same as the formation region of the Fresnel lens step 18a. Does not need to form the control step 18b in another region.
- the light irradiation area is widened to improve the visibility. On top of that, the size of the vehicle lamp 1 can be reduced.
- the first curved surface portion 15 and the second curved surface portion 16 that are convex in a predetermined direction are continuous with the inner lens 7 on which the Fresnel lens step 18a is formed.
- the direction in which the first curved surface portion 15 becomes convex and the direction in which the second curved surface portion 16 becomes convex are different.
- the inner lens 7 can be formed into a shape and a size that do not easily interfere with each part arranged inside the lamp outer casing 4 and the lamp outer casing 4 according to the shape and size of each portion.
- the inner lens 7 is formed as a Fresnel lens, the inner lens 7 is made thinner, and the vehicle lamp 1 is miniaturized, and then the light emitted to the outside is sufficiently bright and irradiated. The area can be secured.
- the transparent portion 3b of the cover 3 is inclined in the vertical direction with the upper end positioned in front of the lower end, so that the outer surface faces upward with respect to the vertical surface. Therefore, the first curved surface portion 15 is located above the second curved surface portion 16, the convex direction of the first curved surface portion 15 is set to the emitting direction of the light from the emitting surface 18, and the second curved surface portion By making the convex direction of 16 opposite to the light emitting direction from the emitting surface 18, the upper and lower ends of the inner lens 7 are less likely to interfere with the lamp outer casing 4, etc., and the degree of freedom in design is improved. Therefore, the area of the exit surface 18 can be further increased.
- the first curved surface portion 15 is located above the second curved surface portion 16, the convex direction of the first curved surface portion 15 is the light emitting direction, and the second curved surface portion 16
- the convex direction of the first curved surface portion 15 and the second curved surface portion 16 is the lamp outer casing 4 or the lamp outer casing 4.
- the convex direction of the first curved surface portion 15 may be opposite to the light emitting direction
- the convex direction of the second curved surface portion 16 may be the light emitting direction.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
The present invention comprises: a light source that emits light; and an inner lens having an entry surface via which light emitted from the light source enters and an emission surface via which the light that has entered is emitted, the inner lens having Fresnel lens steps formed thereon. A first curved surface part and a second curved surface part are provided continuously on the inner lens, each of the curved surface parts being convex in respectively prescribed directions. The direction in which the first curved surface part is convex and the direction in which the second curved surface part is convex are different directions. This makes it possible to form the inner lens, which is positioned inside a lamp outer case, in such a size and shape as not to readily interfere with the lamp outer case, wherefore the surface area of the emission surface in the inner lens is expanded, and it is possible to ensure sufficient luminance and irradiation area for light that is radiated outward.
Description
本発明は、入射された光を所定の方向へ向けて出射するインナーレンズを有する車輌用灯具についての技術分野に関する。
The present invention relates to a technical field of a vehicle lamp having an inner lens that emits incident light in a predetermined direction.
車輌用灯具には、カバーとランプハウジングによって構成された灯具外筐の内部に光源とフレネルレンズステップが形成されたインナーレンズが配置され、光源から出射された光が入射面からインナーレンズに入射されインナーレンズによって制御されて出射面から外部へ向けて照射されるタイプがある(例えば、特許文献1参照)。
In a vehicle lamp, an inner lens in which a light source and a Frenel lens step are formed is arranged inside a lamp outer housing composed of a cover and a lamp housing, and light emitted from the light source is incident on the inner lens from an incident surface. There is a type that is controlled by an inner lens and is irradiated from the exit surface to the outside (see, for example, Patent Document 1).
インナーレンズには、例えば、出射面に光を制御するフレネルレンズステップが形成されている。
The inner lens has, for example, a Fresnel lens step that controls light on the exit surface.
ところで、上記のようなフレネルレンズステップが形成されたインナーレンズを有する車輌用灯具においては、インナーレンズがフレネルレンズとして形成されることによりインナーレンズの薄型化が図られ、車輌用灯具の小型化を図ることが可能になる。
By the way, in a vehicle lamp having an inner lens on which a Fresnel lens step is formed as described above, the inner lens is formed as a Fresnel lens to reduce the thickness of the inner lens and reduce the size of the vehicle lamp. It becomes possible to plan.
ところが、車輌用灯具は車輌の車体の形状やデザインに応じた形状や大きさに形成されることも多く、灯具外筐の形状や大きさによってはインナーレンズが灯具外筐に干渉しないようにするためにインナーレンズの大きさが制限されるおそれがある。
However, vehicle lamps are often formed in a shape and size according to the shape and design of the vehicle body, and depending on the shape and size of the lamp outer casing, the inner lens should not interfere with the lamp outer casing. Therefore, the size of the inner lens may be limited.
このようにインナーレンズの大きさが制限されてしまうと、インナーレンズをフレネルレンズとして形成してインナーレンズの薄型化を図ってもインナーレンズにおける出射面の面積が小さくなってしまい、外部へ向けて照射される光の輝度が不十分になったり、光の十分な照射領域を確保することができなくなるおそれもある。
If the size of the inner lens is limited in this way, the area of the exit surface of the inner lens becomes smaller even if the inner lens is formed as a Fresnel lens to make the inner lens thinner, and the inner lens is directed toward the outside. The brightness of the irradiated light may be insufficient, or a sufficient irradiation area of the light may not be secured.
そこで、本発明車輌用灯具は、インナーレンズにおける出射面の面積を広くして外部へ向けて照射される光の十分な輝度と照射領域を確保することを目的とする。
Therefore, the object of the vehicle lamp of the present invention is to widen the area of the exit surface of the inner lens to secure sufficient brightness and irradiation area of the light emitted toward the outside.
第1に、本発明に係る車輌用灯具は、光を出射する光源と、前記光源から出射される光が入射される入射面と入射された光を出射する出射面とを有しフレネルレンズステップが形成されたインナーレンズとを備え、前記インナーレンズにはそれぞれ所定の方向に凸になる第1の曲面部と第2の曲面部が連続して設けられ、前記第1の曲面部の凸になる方向と前記第2の曲面部の凸になる方向とが異なる方向にされたものである。
First, the vehicle lamp according to the present invention has a light source that emits light, an incident surface on which the light emitted from the light source is incident, and an emitting surface that emits the incident light. The inner lens is provided with a first curved surface portion and a second curved surface portion that are convex in a predetermined direction, respectively, and the first curved surface portion is convex. The direction of the second curved surface and the direction of the convexity of the second curved surface portion are different.
これにより、フレネルレンズステップが形成されたインナーレンズにおける第1の曲面部と第2の曲面部の湾曲方向が異なる方向になり、灯具外筐の内部に配置されるインナーレンズを灯具外筐に干渉し難い形状及び大きさに形成することが可能になる。
As a result, the bending directions of the first curved surface portion and the second curved surface portion of the inner lens on which the Fresnel lens step is formed become different directions, and the inner lens arranged inside the lamp outer casing interferes with the lamp outer casing. It becomes possible to form a shape and size that are difficult to make.
第2に、上記した本発明に係る車輌用灯具においては、前記第1の曲面部が前記第2の曲面部の上側に位置され、前記第1の曲面部の凸になる方向が前記出射面からの光の出射方向にされ、前記第2の曲面部の凸になる方向が前記出射面からの光の出射方向と反対方向にされることが望ましい。
Secondly, in the vehicle lamp according to the present invention described above, the first curved surface portion is located above the second curved surface portion, and the direction in which the first curved surface portion becomes convex is the exit surface. It is desirable that the direction in which the light is emitted from the second curved surface portion is set to the direction in which the light is emitted from the second curved surface portion is opposite to the direction in which the light is emitted from the emitting surface.
これにより、灯具外筐のカバーが垂直面に対して外面が上向きになるようにされている状態において、インナーレンズの上下両端部が灯具外筐に干渉し難くなる。
As a result, the upper and lower ends of the inner lens are less likely to interfere with the outer case of the lamp when the cover of the outer case of the lamp is oriented so that the outer surface faces upward with respect to the vertical surface.
第3に、上記した本発明に係る車輌用灯具においては、前記入射面の一部と前記出射面の一部にそれぞれプリズムレンズステップが形成されることが望ましい。
Thirdly, in the vehicle lamp according to the present invention described above, it is desirable that prism lens steps are formed on a part of the entrance surface and a part of the emission surface, respectively.
これにより、プリズムレンズステップにより出射面から出射される光の制御の自由度が高くなる。
This increases the degree of freedom in controlling the light emitted from the exit surface by the prism lens step.
第4に、上記した本発明に係る車輌用灯具においては、前記第1の曲面部と前記第2の曲面部の境界に段差面が形成されることが望ましい。
Fourth, in the vehicle lamp according to the present invention described above, it is desirable that a stepped surface is formed at the boundary between the first curved surface portion and the second curved surface portion.
これにより、段差面によって第1の曲面部と第2の曲面部の曲面形状を形成し易くなる。
This makes it easier to form the curved surface shapes of the first curved surface portion and the second curved surface portion due to the stepped surface.
第5に、上記した本発明に係る車輌用灯具においては、前記光源とは別の光源が設けられ、前記インナーレンズに隣接して前記別の光源から出射される光を反射する反射部を有するリフレクターが配置され、前記リフレクターには前記反射部の周囲に外面部が設けられ、前記外面部に前記出射面から出射される光の一部を反射する反射制御部が形成されることが望ましい。
Fifth, the vehicle lighting equipment according to the present invention described above is provided with a light source different from the light source, and has a reflecting portion adjacent to the inner lens to reflect the light emitted from the other light source. It is desirable that a reflector is arranged, an outer surface portion is provided around the reflection portion of the reflector, and a reflection control portion for reflecting a part of light emitted from the emission surface is formed on the outer surface portion.
これにより、インナーレンズの一部によって出射面から出射される光の一部が反射されるため、出射面から出射される光を反射する専用の反射部を設ける必要がない。
As a result, a part of the light emitted from the emitting surface is reflected by a part of the inner lens, so that it is not necessary to provide a dedicated reflecting portion for reflecting the light emitted from the emitting surface.
本発明によれば、フレネルレンズステップが形成されたインナーレンズにおける第1の曲面部と第2の曲面部の湾曲方向が異なる方向になり、灯具外筐の内部に配置されるインナーレンズを灯具外筐に干渉し難い形状及び大きさに形成することが可能になるため、インナーレンズにおける出射面の面積を広くして外部へ向けて照射される光の十分な輝度と照射領域を確保することができる。
According to the present invention, the bending directions of the first curved surface portion and the second curved surface portion of the inner lens on which the Fresnel lens step is formed are different, and the inner lens arranged inside the outer casing of the lamp is placed outside the lamp. Since it is possible to form a shape and size that does not easily interfere with the housing, it is possible to widen the area of the exit surface of the inner lens to secure sufficient brightness and irradiation area of the light emitted to the outside. can.
以下に、本発明車輌用灯具を実施するための形態について添付図面を参照して説明する。
Hereinafter, a mode for implementing the vehicle lamp of the present invention will be described with reference to the attached drawings.
車輌用灯具1は、例えば、車体の後端部における左右両端部に取り付けられ、車輌用標識灯として機能する。車輌用灯具1は、例えば、テールランプ、ストップランプ及びターンシグナルランプの機能を有するコンビネーションランプとして用いられる。
The vehicle lighting tool 1 is attached to both left and right ends of the rear end of the vehicle body, and functions as a vehicle indicator light, for example. The vehicle lamp 1 is used, for example, as a combination lamp having the functions of a tail lamp, a stop lamp, and a turn signal lamp.
尚、以下には、車輌用灯具1からの光の出射方向を後方として前後上下左右の方向を説明する。但し、以下に示す前後上下左右の方向は説明の便宜上のものであり、本発明の実施に関しては、これらの方向に限定されることはない。
In the following, the front-back, up-down, left-right directions will be described with the light emission direction from the vehicle lamp 1 as the rear. However, the front-back, up-down, left-right directions shown below are for convenience of explanation, and the practice of the present invention is not limited to these directions.
車輌用灯具1は後方から側方に亘る位置に開口を有するランプハウジング2とランプハウジング2の開口を閉塞するカバー3とを備えている(図1参照)。ランプハウジング2とカバー3によって灯具外筐4が構成され、灯具外筐4の内部空間が灯室として形成されている。
The vehicle lamp 1 includes a lamp housing 2 having an opening at a position extending from the rear to the side, and a cover 3 for closing the opening of the lamp housing 2 (see FIG. 1). The lamp housing 2 and the cover 3 form a lamp outer housing 4, and the internal space of the lamp outer housing 4 is formed as a lamp chamber.
ランプハウジング2には後述する第1の光源と第2の光源が取り付けられている。
A first light source and a second light source, which will be described later, are attached to the lamp housing 2.
カバー3は、外周部が、例えば、黒色の材料によって形成された遮光部3aとして設けられ、遮光部3aの内側の部分が光の透過が可能な透過部3bとして設けられている。第1の光源と第2の光源から出射される光はカバー3の透過部3bを透過されて外部へ向けて照射される。尚、カバー3の透過部3bには、例えば、内面に光を拡散する拡散ステップが形成されていてもよい。
The outer peripheral portion of the cover 3 is provided as, for example, a light-shielding portion 3a formed of a black material, and the inner portion of the light-shielding portion 3a is provided as a transmission portion 3b capable of transmitting light. The light emitted from the first light source and the second light source is transmitted to the outside through the transmitting portion 3b of the cover 3. The transmission portion 3b of the cover 3 may be formed with, for example, a diffusion step for diffusing light on the inner surface.
カバー3の透過部3bは、例えば、上端が下端より前側に位置された状態で上下方向に対して傾斜され、垂直面に対して外面(後面)が上向きになるようにされている。
The transparent portion 3b of the cover 3 is inclined in the vertical direction with the upper end positioned in front of the lower end, so that the outer surface (rear surface) faces upward with respect to the vertical surface.
灯室には灯具ユニット5が配置されている(図1乃至図3参照)。灯具ユニット5はリフレクター6とインナーレンズ7と第1の光源8と第2の光源9を有している。尚、第1の光源8と第2の光源9としては、例えば、発光ダイオード(LED:Light Emitting Diode)が発光部として用いられ、発光部を搭載する基板がハウジングに取り付けられた所謂LEDソケットと称される構成が使用されていてもよい。
A lamp unit 5 is arranged in the lamp room (see FIGS. 1 to 3). The lamp unit 5 has a reflector 6, an inner lens 7, a first light source 8, and a second light source 9. As the first light source 8 and the second light source 9, for example, a light emitting diode (LED: Light Emitting Diode) is used as a light emitting unit, and a so-called LED socket in which a substrate on which the light emitting unit is mounted is attached to a housing. The referred configuration may be used.
リフレクター6は灯室においてランプハウジング2に図示しない被取付部がネジ止め等によって取り付けられた状態で配置され、反射部10と外面部11を有している。
The reflector 6 is arranged in a lamp room with a mounted portion (not shown) attached to the lamp housing 2 by screwing or the like, and has a reflecting portion 10 and an outer surface portion 11.
反射部10は後方に開口された箱状に形成され、内面が反射面10aとして形成されている。反射部10には第1の光源8を配置するための図示しない配置孔が形成されている。
The reflective portion 10 is formed in a box shape that is opened rearward, and the inner surface is formed as the reflective surface 10a. The reflecting portion 10 is formed with an arrangement hole (not shown) for arranging the first light source 8.
外面部11は反射部10の左右方向における一方の側部から下部に亘る部分の後端部から前方に突出された状態で設けられ、反射部10の周囲に位置されている。外面部11における外面の一部にはアルミニウム等の金属蒸着が施され、金属蒸着が施された部分が反射制御部11aとして形成されている。
The outer surface portion 11 is provided so as to project forward from the rear end portion of the portion extending from one side portion to the lower portion in the left-right direction of the reflection portion 10, and is located around the reflection portion 10. A part of the outer surface of the outer surface portion 11 is vapor-deposited with a metal such as aluminum, and the portion where the metal is vapor-deposited is formed as the reflection control portion 11a.
インナーレンズ7は灯室においてランプハウジング2に図示しない被取付部がネジ止め等によって取り付けられた状態で配置され、リフレクター6の外面部11に沿って配置されリフレクター6に隣接して位置されている。インナーレンズ7は、例えば、透明な樹脂材料によって各部が一体に形成された板状にされ、光制御部12と導光面部13と周面部14を有している(図2乃至図5参照)。
The inner lens 7 is arranged in the lamp chamber in a state where an attached portion (not shown) is attached to the lamp housing 2 by screwing or the like, is arranged along the outer surface portion 11 of the reflector 6, and is located adjacent to the reflector 6. .. The inner lens 7 is formed into a plate shape in which each portion is integrally formed of, for example, a transparent resin material, and has an optical control unit 12, a light guide surface portion 13, and a peripheral surface portion 14 (see FIGS. 2 to 5). ..
光制御部12は上下で連続された第1の曲面部15と第2の曲面部16によって構成され、厚み方向が略前後方向にされる向きで配置されている。光制御部12の前面は入射面17として形成され、光制御部12の後面は出射面18として形成されている。
The optical control unit 12 is composed of a first curved surface portion 15 and a second curved surface portion 16 which are continuous vertically, and is arranged so that the thickness direction is substantially the front-rear direction. The front surface of the optical control unit 12 is formed as an incident surface 17, and the rear surface of the optical control unit 12 is formed as an exit surface 18.
第1の曲面部15は緩やかに湾曲されて後方に凸の略球面状に形成され、第2の曲面部16は緩やかに湾曲されて前方に凸の略球面状に形成されている(図2参照)。従って、第1の曲面部15と第2の曲面部16は連続して設けられると共に第1の曲面部15の凸になる方向と第2の曲面部16の凸になる方向とが反対方向にされている。但し、第1の曲面部15の凸になる方向と第2の曲面部16の凸になる方向とは反対方向に限られず異なる方向にされていればよい。
The first curved surface portion 15 is gently curved to form a substantially spherical shape that is convex rearward, and the second curved surface portion 16 is gently curved to form a substantially spherical surface that is convex forward (FIG. 2). reference). Therefore, the first curved surface portion 15 and the second curved surface portion 16 are continuously provided, and the convex direction of the first curved surface portion 15 and the convex direction of the second curved surface portion 16 are opposite to each other. Has been done. However, the convex direction of the first curved surface portion 15 and the convex direction of the second curved surface portion 16 are not limited to the opposite directions, and may be different directions.
第1の曲面部15と第2の曲面部16の境界には段差面19、19が形成されている(図5参照)。段差面19、19は光制御部12の左右方向における中央部の左右に形成されている。第1の曲面部15は略上下に延びる形状に形成され、第2の曲面部16はリフレクター6における外面部11に沿うように下方へ行くに従って側方に変位するように屈曲した形状に形成されている。
Stepped surfaces 19 and 19 are formed at the boundary between the first curved surface portion 15 and the second curved surface portion 16 (see FIG. 5). The stepped surfaces 19 and 19 are formed on the left and right sides of the central portion of the optical control unit 12 in the left-right direction. The first curved surface portion 15 is formed in a shape extending substantially vertically, and the second curved surface portion 16 is formed in a bent shape so as to be displaced laterally as it goes downward along the outer surface portion 11 of the reflector 6. ing.
出射面18にはフレネルレンズステップ18aが形成されている(図2乃至図5参照)。フレネルレンズステップ18aは、例えば、第1の曲面部15の下端部の左右方向における中央部を中心とした円弧状のステップとして形成され、段差面19、19以外の部分に形成されている。従って、インナーレンズ7はフレネルレンズとして形成され、インナーレンズ7がフレネルレンズとして形成されることによりインナーレンズ7の薄型化が図られている。
A Fresnel lens step 18a is formed on the exit surface 18 (see FIGS. 2 to 5). The Fresnel lens step 18a is formed, for example, as an arc-shaped step centered on a central portion in the left-right direction of the lower end portion of the first curved surface portion 15, and is formed on a portion other than the stepped surfaces 19 and 19. Therefore, the inner lens 7 is formed as a Fresnel lens, and the inner lens 7 is formed as a Fresnel lens to reduce the thickness of the inner lens 7.
第1の曲面部15における上端部の前後両面にはそれぞれプリズムレンズステップ15aとプリズムレンズステップ15bが形成され、出射面18に形成されたフレネルレンズステップ18aの一部がプリズムレンズステップ15aとしても機能する。第1の曲面部15の下端部における一部には、出射面18に制御ステップ18bが形成されている。制御ステップ18bは出射面18から光を側方へ向けて出射させる機能を有している。
A prism lens step 15a and a prism lens step 15b are formed on both front and rear surfaces of the upper end portion of the first curved surface portion 15, and a part of the Fresnel lens step 18a formed on the exit surface 18 also functions as the prism lens step 15a. do. A control step 18b is formed on the exit surface 18 at a part of the lower end portion of the first curved surface portion 15. The control step 18b has a function of emitting light laterally from the exit surface 18.
導光面部13は第2の曲面部16における第1の曲面部15と反対側の端縁に連続して設けられ、略左右に延びる形状に形成されている。導光面部13には拡散ステップ13aが形成されている。
The light guide surface portion 13 is continuously provided on the edge of the second curved surface portion 16 on the opposite side of the first curved surface portion 15, and is formed in a shape extending substantially to the left and right. A diffusion step 13a is formed on the light guide surface portion 13.
周面部14は第2の曲面部16と導光面部13に連続され、第2の曲面部16と導光面部13の下方から導光面部13の側方に亘る位置とに設けられている。周面部14には拡散ステップ14aが形成されている。
The peripheral surface portion 14 is continuous with the second curved surface portion 16 and the light guide surface portion 13, and is provided at a position extending from below the second curved surface portion 16 and the light guide surface portion 13 to the side of the light guide surface portion 13. A diffusion step 14a is formed on the peripheral surface portion 14.
導光面部13の拡散ステップ13aと周面部14の拡散ステップ14aとにより、インナーレンズ7の前側に存在する構造が視認され難くなり、被視認性の向上が図られる。
The diffusion step 13a of the light guide surface portion 13 and the diffusion step 14a of the peripheral surface portion 14 make it difficult to see the structure existing on the front side of the inner lens 7, and improve the visibility.
第1の光源8はランプハウジング2に取り付けられ、リフレクター6の反射部10に形成された配置孔に挿通された状態で配置されている(図3参照)。第1の光源8としては、例えば、ハロゲン灯や白熱灯等が用いられている。第1の光源8からは、例えば、ターンシグナルランプとしての光が出射される。
The first light source 8 is attached to the lamp housing 2 and is arranged in a state of being inserted into an arrangement hole formed in the reflection portion 10 of the reflector 6 (see FIG. 3). As the first light source 8, for example, a halogen lamp, an incandescent lamp, or the like is used. Light as a turn signal lamp is emitted from the first light source 8.
第2の光源9はランプハウジング2に取り付けられ、発光部9aがインナーレンズ7の入射面17に対向して配置されている。第2の光源9は発光部9aとして、例えば、発光ダイオード(LED:Light Emitting Diode)が用いられ、発光部9aがフレネルレンズステップ18aの中心位置である第1の曲面部15の下端部の左右方向における中央部の前側に位置されている。第2の光源9からは、例えば、テールランプ又はストップランプとしての光が出射される。
The second light source 9 is attached to the lamp housing 2, and the light emitting portion 9a is arranged so as to face the incident surface 17 of the inner lens 7. As the second light source 9, for example, a light emitting diode (LED: Light Emitting Diode) is used as the light emitting portion 9a, and the light emitting portion 9a is located on the left and right of the lower end portion of the first curved surface portion 15 at the center position of the Fresnel lens step 18a. It is located in front of the central part in the direction. Light as, for example, a tail lamp or a stop lamp is emitted from the second light source 9.
上記したように、インナーレンズ7においては、後方に凸の略球面状に形成された第1の曲面部15と前方に凸の略球面状に形成された第2の曲面部16の境界に段差面19、19が形成されているため、段差面19、19によって第1の曲面部15と第2の曲面部16の球面形状(曲面形状)を形成し易くなり、インナーレンズ7の成形精度の向上を図ることができる。
As described above, in the inner lens 7, there is a step at the boundary between the first curved surface portion 15 formed in a substantially spherical shape convex rearward and the second curved surface portion 16 formed in a substantially spherical shape convex forward. Since the surfaces 19 and 19 are formed, it becomes easy to form the spherical shape (curved surface shape) of the first curved surface portion 15 and the second curved surface portion 16 by the stepped surfaces 19 and 19, and the molding accuracy of the inner lens 7 is improved. It can be improved.
上記のように構成された車輌用灯具1において、第1の光源8から光が出射されると、出射された光はリフレクター6の反射面10aで反射され、カバー3の透過部3bを透過されて外部へ向けて照射される。
In the vehicle lamp 1 configured as described above, when light is emitted from the first light source 8, the emitted light is reflected by the reflecting surface 10a of the reflector 6 and transmitted through the transmitting portion 3b of the cover 3. Is irradiated to the outside.
第2の光源9の発光部9aから光が出射されると、出射された光は入射面17からインナーレンズ7に入射される(図6参照)。インナーレンズ7に入射された光のうちプリズムレンズステップ15aより下側に入射された光はフレネルレンズステップ18aによって制御されて平行光にされ、カバー3の透過部3bを透過されて外部へ向けて照射される。一方、インナーレンズ7に入射された光のうちプリズムレンズステップ15aから入射された光はプリズムレンズステップ15aとプリズムレンズステップ15bによって制御されて平行光又は平行より稍上向きに向かう光にされ、カバー3の透過部3bを透過されて外部へ向けて照射される(図7参照)。
When light is emitted from the light emitting portion 9a of the second light source 9, the emitted light is incident on the inner lens 7 from the incident surface 17 (see FIG. 6). Of the light incident on the inner lens 7, the light incident on the lower side of the prism lens step 15a is controlled by the Fresnel lens step 18a to be parallel light, and is transmitted through the transmitting portion 3b of the cover 3 and directed to the outside. Be irradiated. On the other hand, of the light incident on the inner lens 7, the light incident from the prism lens step 15a is controlled by the prism lens step 15a and the prism lens step 15b to be parallel light or light directed upward from parallel to cover 3. It is transmitted to the outside through the transmission portion 3b of the lens (see FIG. 7).
このようにインナーレンズ7の一部には入射面17と出射面18にそれぞれプリズムレンズステップ15aとプリズムレンズステップ15bが形成されているため、プリズムレンズステップ15a、15bにより出射面18から出射される光の制御の自由度が高くなり、所望の方向へ光を照射することができる。
As described above, since the prism lens step 15a and the prism lens step 15b are formed on the incident surface 17 and the emitting surface 18 in a part of the inner lens 7, they are emitted from the emitting surface 18 by the prism lens steps 15a and 15b, respectively. The degree of freedom in controlling the light is increased, and the light can be irradiated in a desired direction.
特に、第1の曲面部15が後方に凸の湾曲された形状に形成されているため、第1の曲面部15の上端部においてはフレネルレンズステップ18aで制御された光が出射面18から上向きに出射され易くなるが、第1の曲面部15の上端部にプリズムレンズステップ15a、15bが形成されることにより、第1の曲面部15の上端部から出射する光を平行光又は平行光に近い光に制御することが可能になり、第1の曲面部15の全体から所望の方向へ向けて光を出射させることができる。
In particular, since the first curved surface portion 15 is formed in a curved shape that is convex rearward, the light controlled by the Fresnel lens step 18a faces upward from the emission surface 18 at the upper end portion of the first curved surface portion 15. However, by forming the prism lens steps 15a and 15b at the upper end portion of the first curved surface portion 15, the light emitted from the upper end portion of the first curved surface portion 15 becomes parallel light or parallel light. It becomes possible to control the light to be close to the light, and the light can be emitted from the entire first curved surface portion 15 in a desired direction.
尚、車輌用灯具1においては、インナーレンズ7に入射された光の一部が第2の曲面部16から導光面部13や周面部14に導かれ、導光面部13や周面部14から後方や後斜め下方に出射されてもよい。
In the vehicle lamp 1, a part of the light incident on the inner lens 7 is guided from the second curved surface portion 16 to the light guide surface portion 13 and the peripheral surface portion 14, and is rearward from the light guide surface portion 13 and the peripheral surface portion 14. It may be emitted diagonally downward.
また、インナーレンズ7に入射された光の一部は制御ステップ18bに達し制御ステップ18bによって制御されて側方へ向けて出射される(図8参照)。制御ステップ18bによって制御された光はリフレクター6の外面部11に形成された反射制御部11aに入射され、反射制御部11aで所定の方向へ向けて反射される。具体的には、反射制御部11aで反射された光は略側方かつ斜め下方へ向かう光にされ、例えば、反射制御部11aを基準として左右方向に対して前側約10度かつ下側約15度の方向へ向かって車輌の側方へ向けて照射される。
Further, a part of the light incident on the inner lens 7 reaches the control step 18b, is controlled by the control step 18b, and is emitted toward the side (see FIG. 8). The light controlled by the control step 18b is incident on the reflection control unit 11a formed on the outer surface portion 11 of the reflector 6, and is reflected by the reflection control unit 11a in a predetermined direction. Specifically, the light reflected by the reflection control unit 11a is made to be light that goes substantially laterally and diagonally downward. For example, the front side is about 10 degrees and the lower side is about 15 degrees with respect to the left-right direction with respect to the reflection control unit 11a. It is irradiated toward the side of the vehicle in the direction of degree.
このように、車輌用灯具1においては、第2の光源9から出射された光がインナーレンズ7の出射面18から出射されて後方へ向けて照射される上に、出射面18から出射された光の一部が側方へ向けて照射されるため、光源の数を増やすことなく広範囲の領域へ向けて光が照射され、部品点数の削減及び構造の簡素化を図った上で光の照射領域を広げて視認性の向上を図ることができる。
As described above, in the vehicle lamp 1, the light emitted from the second light source 9 is emitted from the exit surface 18 of the inner lens 7 and is emitted backward, and is also emitted from the emission surface 18. Since part of the light is emitted sideways, the light is emitted toward a wide area without increasing the number of light sources, and the number of parts is reduced and the structure is simplified before irradiating the light. The area can be expanded to improve visibility.
また、車輌用灯具1においては、インナーレンズ7に隣接して第2の光源9とは別の第1の光源8から出射される光を反射するリフレクター6が配置され、リフレクター6の外面部11に出射面18から出射される光の一部を反射する反射制御部11aが形成されている。
Further, in the vehicle lamp 1, a reflector 6 that reflects light emitted from a first light source 8 different from the second light source 9 is arranged adjacent to the inner lens 7, and an outer surface portion 11 of the reflector 6 is arranged. A reflection control unit 11a that reflects a part of the light emitted from the exit surface 18 is formed on the surface.
従って、インナーレンズ7の一部によって出射面18から出射される光の一部が反射されるため、出射面18から出射される光を反射する専用の反射部を設ける必要がなく、構造の簡素化を図った上で出射面18から出射される光の有効活用を図ることができる。
Therefore, since a part of the light emitted from the emitting surface 18 is reflected by a part of the inner lens 7, it is not necessary to provide a dedicated reflecting portion for reflecting the light emitted from the emitting surface 18, and the structure is simple. It is possible to make effective use of the light emitted from the exit surface 18 after making the light.
さらに、反射制御部11aへ向けて光を出射する制御ステップ18bの形成位置は出射面18におけるフレネルレンズステップ18aが形成された領域の一部にされているため、フレネルレンズステップ18aの形成領域とは別の領域に制御ステップ18bを形成する必要がない。
Further, since the formation position of the control step 18b that emits light toward the reflection control unit 11a is a part of the region where the Fresnel lens step 18a is formed on the emission surface 18, it is the same as the formation region of the Fresnel lens step 18a. Does not need to form the control step 18b in another region.
従って、制御ステップ18bを形成するための専用の領域を必要とせず、制御ステップ18bを形成するためにインナーレンズ7を大きくする必要がないため、光の照射領域を広げて視認性の向上を図った上で車輌用灯具1の小型化を図ることができる。
Therefore, since a dedicated area for forming the control step 18b is not required and the inner lens 7 does not need to be enlarged to form the control step 18b, the light irradiation area is widened to improve the visibility. On top of that, the size of the vehicle lamp 1 can be reduced.
以上に記載した通り、車輌用灯具1にあっては、フレネルレンズステップ18aが形成されたインナーレンズ7にそれぞれ所定の方向に凸になる第1の曲面部15と第2の曲面部16が連続して設けられ、第1の曲面部15の凸になる方向と第2の曲面部16の凸になる方向とが異なる方向にされている。
As described above, in the vehicle lamp 1, the first curved surface portion 15 and the second curved surface portion 16 that are convex in a predetermined direction are continuous with the inner lens 7 on which the Fresnel lens step 18a is formed. The direction in which the first curved surface portion 15 becomes convex and the direction in which the second curved surface portion 16 becomes convex are different.
従って、フレネルレンズステップ18aが形成されたインナーレンズ7における第1の曲面部15と第2の曲面部16の湾曲方向が異なる方向になり、灯具外筐4や灯具外筐4の内部に配置される各部の形状や大きさに応じてインナーレンズ7を灯具外筐4や灯具外筐4の内部に配置される各部に干渉し難い形状及び大きさに形成することが可能になる。
Therefore, the bending directions of the first curved surface portion 15 and the second curved surface portion 16 in the inner lens 7 in which the Fresnel lens step 18a is formed are different, and the lamp outer housing 4 and the lamp outer housing 4 are arranged inside. The inner lens 7 can be formed into a shape and a size that do not easily interfere with each part arranged inside the lamp outer casing 4 and the lamp outer casing 4 according to the shape and size of each portion.
これにより、灯室のスペースを有効に活用し、インナーレンズ7における出射面18の面積を広くして外部へ向けて照射される光の十分な輝度と照射領域を確保することができる。
As a result, it is possible to effectively utilize the space of the lighting room, widen the area of the exit surface 18 of the inner lens 7, and secure sufficient brightness and irradiation area of the light emitted toward the outside.
また、インナーレンズ7がフレネルレンズとして形成されることによりインナーレンズ7の薄型化が図られ、車輌用灯具1の小型化を図った上で外部へ向けて照射される光の十分な輝度と照射領域を確保することができる。
Further, since the inner lens 7 is formed as a Fresnel lens, the inner lens 7 is made thinner, and the vehicle lamp 1 is miniaturized, and then the light emitted to the outside is sufficiently bright and irradiated. The area can be secured.
特に、カバー3の透過部3bは上端が下端より前側に位置された状態で上下方向に対して傾斜され、垂直面に対して外面が上向きになるようにされている。従って、第1の曲面部15が第2の曲面部16の上側に位置され、第1の曲面部15の凸になる方向が出射面18からの光の出射方向にされ、第2の曲面部16の凸になる方向が出射面18からの光の出射方向と反対方向にされることにより、インナーレンズ7の上下両端部が灯具外筐4等に干渉し難くなり、設計の自由度の向上により出射面18の面積を一層大きくすることができる。
In particular, the transparent portion 3b of the cover 3 is inclined in the vertical direction with the upper end positioned in front of the lower end, so that the outer surface faces upward with respect to the vertical surface. Therefore, the first curved surface portion 15 is located above the second curved surface portion 16, the convex direction of the first curved surface portion 15 is set to the emitting direction of the light from the emitting surface 18, and the second curved surface portion By making the convex direction of 16 opposite to the light emitting direction from the emitting surface 18, the upper and lower ends of the inner lens 7 are less likely to interfere with the lamp outer casing 4, etc., and the degree of freedom in design is improved. Therefore, the area of the exit surface 18 can be further increased.
尚、上記には、第1の曲面部15が第2の曲面部16の上側に位置され、第1の曲面部15の凸になる方向が光の出射方向にされ、第2の曲面部16の凸になる方向が光の出射方向と反対方向にされた例を示したが、第1の曲面部15と第2の曲面部16の凸になる方向は灯具外筐4や灯具外筐4の内部に配置される各部の形状や大きさに応じて、異なる方向であれば任意の方向にすることが可能である。例えば、第1の曲面部15の凸になる方向が光の出射方向と反対方向にされ、第2の曲面部16の凸になる方向が光の出射方向にされてもよい。
In the above, the first curved surface portion 15 is located above the second curved surface portion 16, the convex direction of the first curved surface portion 15 is the light emitting direction, and the second curved surface portion 16 An example is shown in which the convex direction of is opposite to the light emission direction, but the convex direction of the first curved surface portion 15 and the second curved surface portion 16 is the lamp outer casing 4 or the lamp outer casing 4. Depending on the shape and size of each part arranged inside the light, it can be in any direction as long as it is in a different direction. For example, the convex direction of the first curved surface portion 15 may be opposite to the light emitting direction, and the convex direction of the second curved surface portion 16 may be the light emitting direction.
1…車輌用灯具、6…リフレクター、7…インナーレンズ、8…第1の光源、9…第2の光源、10…反射部、11…外面部、11a…反射制御部、15…第1の曲面部、15a…プリズムレンズステップ、15b…プリズムレンズステップ、16…第2の曲面部、17…入射面、18…出射面、18a…フレネルレンズステップ、18b…制御ステップ、19…段差面
1 ... Vehicle lighting, 6 ... Reflector, 7 ... Inner lens, 8 ... First light source, 9 ... Second light source, 10 ... Reflector, 11 ... Outer surface, 11a ... Reflection control, 15 ... First Curved surface, 15a ... Prism lens step, 15b ... Prism lens step, 16 ... Second curved surface, 17 ... Incident surface, 18 ... Emission surface, 18a ... Frenel lens step, 18b ... Control step, 19 ... Step surface
Claims (5)
- 光を出射する光源と、
前記光源から出射される光が入射される入射面と入射された光を出射する出射面とを有しフレネルレンズステップが形成されたインナーレンズとを備え、
前記インナーレンズにはそれぞれ所定の方向に凸になる第1の曲面部と第2の曲面部が連続して設けられ、
前記第1の曲面部の凸になる方向と前記第2の曲面部の凸になる方向とが異なる方向にされた
車輌用灯具。 A light source that emits light and
An inner lens having an incident surface on which light emitted from the light source is incident and an emitting surface on which incident light is emitted and a Fresnel lens step is formed is provided.
Each of the inner lenses is provided with a first curved surface portion and a second curved surface portion that are convex in a predetermined direction in succession.
A vehicle lamp in which the convex direction of the first curved surface portion and the convex direction of the second curved surface portion are in different directions. - 前記第1の曲面部が前記第2の曲面部の上側に位置され、
前記第1の曲面部の凸になる方向が前記出射面からの光の出射方向にされ、
前記第2の曲面部の凸になる方向が前記出射面からの光の出射方向と反対方向にされた
請求項1に記載の車輌用灯具。 The first curved surface portion is located above the second curved surface portion,
The convex direction of the first curved surface portion is set to the emission direction of light from the emission surface.
The vehicle lamp according to claim 1, wherein the convex direction of the second curved surface portion is opposite to the light emitting direction from the emitting surface. - 前記入射面の一部と前記出射面の一部にそれぞれプリズムレンズステップが形成された
請求項1又は請求項2に記載の車輌用灯具。 The vehicle lamp according to claim 1 or 2, wherein prism lens steps are formed on a part of the entrance surface and a part of the emission surface, respectively. - 前記第1の曲面部と前記第2の曲面部の境界に段差面が形成された
請求項1、請求項2又は請求項3に記載の車輌用灯具。 The vehicle lamp according to claim 1, claim 2 or claim 3, wherein a stepped surface is formed at the boundary between the first curved surface portion and the second curved surface portion. - 前記光源とは別の光源が設けられ、
前記インナーレンズに隣接して前記別の光源から出射される光を反射する反射部を有するリフレクターが配置され、
前記リフレクターには前記反射部の周囲に外面部が設けられ、
前記外面部に前記出射面から出射される光の一部を反射する反射制御部が形成された
請求項1、請求項2、請求項3又は請求項4に記載の車輌用灯具。 A light source different from the light source is provided,
A reflector having a reflecting portion that reflects light emitted from the other light source is arranged adjacent to the inner lens.
The reflector is provided with an outer surface portion around the reflective portion.
The vehicle lamp according to claim 1, claim 2, claim 3 or claim 4, wherein a reflection control unit that reflects a part of the light emitted from the exit surface is formed on the outer surface portion.
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Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH0594705A (en) * | 1991-10-02 | 1993-04-16 | Stanley Electric Co Ltd | Inner lens of lighting fixture for vehicle |
JP2006302782A (en) * | 2005-04-22 | 2006-11-02 | Kanto Auto Works Ltd | Lamp structure for vehicles |
JP2010176982A (en) * | 2009-01-28 | 2010-08-12 | Stanley Electric Co Ltd | Vehicular signal lighting fixture |
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- 2021-01-21 JP JP2021573977A patent/JPWO2021153420A1/ja active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0594705A (en) * | 1991-10-02 | 1993-04-16 | Stanley Electric Co Ltd | Inner lens of lighting fixture for vehicle |
JP2006302782A (en) * | 2005-04-22 | 2006-11-02 | Kanto Auto Works Ltd | Lamp structure for vehicles |
JP2010176982A (en) * | 2009-01-28 | 2010-08-12 | Stanley Electric Co Ltd | Vehicular signal lighting fixture |
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