JP2021072203A - Vehicular lighting fixture - Google Patents

Vehicular lighting fixture Download PDF

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Publication number
JP2021072203A
JP2021072203A JP2019197798A JP2019197798A JP2021072203A JP 2021072203 A JP2021072203 A JP 2021072203A JP 2019197798 A JP2019197798 A JP 2019197798A JP 2019197798 A JP2019197798 A JP 2019197798A JP 2021072203 A JP2021072203 A JP 2021072203A
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Prior art keywords
light guide
lens
light
incident
emitted
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JP2019197798A
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JP7306224B2 (en
Inventor
洋一 宮本
Yoichi Miyamoto
洋一 宮本
翔 池之上
Sho Ikenoue
翔 池之上
宗一郎 檀浦
Soichiro Danura
宗一郎 檀浦
綾子 中島
Ayako Nakajima
綾子 中島
正崇 中川
Masataka Nakagawa
正崇 中川
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Ichikoh Industries Ltd
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Ichikoh Industries Ltd
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Priority to JP2019197798A priority Critical patent/JP7306224B2/en
Priority to PCT/JP2020/040804 priority patent/WO2021085597A1/en
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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
    • F21S2/00—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
    • 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
    • F21S43/237—Light guides characterised by the shape of the light guide rod-shaped
    • 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
    • F21S43/239—Light guides characterised by the shape of the light guide plate-shaped

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

Abstract

To provide a vehicular fixture capable of allowing a curved lens emission surface to emit light substantially equally in the light guide direction.SOLUTION: A vehicular lighting fixture 10 includes: an inner lens 11 having lens incident surfaces (23, 26) and lens emission surfaces (24, 27) curving with respect to the light guide direction; light guide bodies (12, 13) having light guide incident surfaces (32, 35), light guide emission surfaces (31, 34) and light guide reflection surfaces (33, 36); and light sources (14, 15). Both ends of the light guide body are made to be one side light guide incident surfaces (32A, 35A) corresponding to one side light sources (14A, 15A) and the other side light guide incident surfaces (32B, 35B) corresponding to the other side light sources (14B, 15B). The light guide reflection surfaces have: one side light guide reflection surfaces (33A, 36A) for reflecting the light which has entered the other side light guide incident surfaces from the other side light sources; and the other side light guide reflection surfaces (33B, 36B) for reflecting the light which has entered the one side light guide incident surfaces from the one side light sources.SELECTED DRAWING: Figure 1

Description

本開示は、車両用灯具に関する。 The present disclosure relates to vehicle lamps.

車両用灯具は、光源からの光を導光体で導光方向へと導き、その導いた光をレンズ入射面からインナーレンズに入射させてそのレンズ出射面から出射させるものが知られている（例えば、特許文献１等参照）。 A vehicle lighting tool is known in which light from a light source is guided in a light guide direction by a light guide body, and the guided light is incident on an inner lens from a lens incident surface and emitted from the lens emitting surface (the lens emitting surface). For example, refer to Patent Document 1 and the like).

この車両用灯具は、レンズ入射面において導光体に対して幅方向での寸法が大きい箇所での曲率を大きくしている。これにより、この車両用灯具は、インナーレンズにおいてレンズ入射面からレンズ出射面へと直に進行する光の割合を、レンズ入射面の幅方向での寸法の違いに拘わらず略等しくしており、全長に亘って略等しい明るさでレンズ出射面を光らせることができる。 This vehicle lighting fixture has a large curvature at a portion of the lens incident surface where the dimension in the width direction is large with respect to the light guide body. As a result, in this vehicle lighting equipment, the proportion of light that travels directly from the incident surface of the lens to the exit surface of the lens in the inner lens is made substantially equal regardless of the difference in dimensions in the width direction of the incident surface of the lens. The lens exit surface can be illuminated with substantially equal brightness over the entire length.

特開２０１７−３３８３６号公報Japanese Unexamined Patent Publication No. 2017-33836

ところで、車両用灯具では、インナーレンズのレンズ出射面を導光方向に対して湾曲させることが求められることがある。すると、車両用灯具では、レンズ出射面において、導光方向の全体に亘り光を行き亘らせることが困難となり、全長に亘って略等しい明るさで光らせることができなくなる。 By the way, in a vehicle lamp, it may be required to bend the lens emitting surface of the inner lens with respect to the light guide direction. Then, in the vehicle lamp, it becomes difficult to spread the light over the entire light guide direction on the lens emitting surface, and it becomes impossible to shine with substantially the same brightness over the entire length.

本開示は、上記の事情に鑑みて為されたもので、湾曲されたレンズ出射面を導光方向で略等しく光らせることのできる車両用灯具を提供することを目的とする。 The present disclosure has been made in view of the above circumstances, and an object of the present disclosure is to provide a vehicle lamp capable of illuminating a curved lens exit surface substantially equally in the light guide direction.

本開示の車両用灯具は、レンズ入射面とレンズ出射面とを有するインナーレンズと、導光方向に延びて設けられ、前記導光方向の端部の導光入射面と、前記レンズ入射面に対向する導光出射面と、前記導光出射面から出射される向きとは反対側の導光反射面と、を有する導光体と、前記導光入射面に対向して設けられた光源と、を備え、前記レンズ出射面は、前記導光方向に対して湾曲され、前記導光入射面は、前記導光体の前記導光方向の一方の端部に設けられた一方側導光入射面と、前記導光体の前記導光方向の他方の端部に設けられた他方側導光入射面と、を有し、前記光源は、前記一方側導光入射面に対応する一方側光源と、前記他方側導光入射面に対応する他方側光源と、を有し、前記導光反射面は、前記一方側導光入射面側に位置する一方側導光反射面と、前記他方側導光入射面側に位置する他方側導光反射面と、を有し、前記一方側導光反射面は、前記他方側光源から出射されて前記他方側導光入射面から入射した光を前記導光出射面へ向けて反射し、前記他方側導光反射面は、前記一方側光源から出射されて前記一方側導光入射面から入射した光を前記導光出射面へ向けて反射することを特徴とする。 The vehicle lighting equipment of the present disclosure is provided on an inner lens having a lens incident surface and a lens exit surface, and is provided extending in the light guide direction, and is provided on the light guide incident surface at the end in the light guide direction and the lens incident surface. A light guide body having a light guide emitting surface facing each other and a light guide reflecting surface opposite to the direction emitted from the light guide emitting surface, and a light source provided facing the light guide incident surface. The lens emitting surface is curved with respect to the light guide direction, and the light guide incident surface is one-sided light guide incident provided at one end of the light guide body in the light guide direction. The light source has a surface and a light guide incident surface on the other side provided at the other end of the light guide in the light guide direction, and the light source is a one-sided light source corresponding to the light incident surface on the one side. And the other side light source corresponding to the other side light guide incident surface, and the light guide reflecting surface is a one side light guide reflecting surface located on the one side light guide incident surface side and the other side. The other side light guide reflecting surface located on the light guide incident surface side, and the one side light guide reflecting surface emits light emitted from the other side light source and incident light from the other side light guide incident surface. The light is reflected toward the light guide emitting surface, and the other side light guide reflecting surface reflects the light emitted from the one side light source and incident from the one side light guide incident surface toward the light guide emitting surface. It is characterized by.

本開示の車両用灯具によれば、湾曲されたレンズ出射面を導光方向で略等しく光らせることができる。 According to the vehicle lighting equipment of the present disclosure, the curved lens emitting surface can be illuminated substantially equally in the light guide direction.

本開示に係る車両用灯具の構成を示す説明図である。It is explanatory drawing which shows the structure of the vehicle lighting equipment which concerns on this disclosure. 車両用灯具の構成を図１とは反対側から示す説明図である。It is explanatory drawing which shows the structure of the vehicle lighting equipment from the side opposite to FIG. 図１のＩ−Ｉ線に沿って得られた端面図である。It is an end view obtained along the line I-I of FIG. 図３のII−II線に沿って得られた断面図である。It is sectional drawing obtained along the line II-II of FIG. 基準面上において、一方側導光反射面で反射して光を出射させる様子を示す図４と同様の説明図である。It is the same explanatory view as FIG. 4 which shows the state which the light is emitted by being reflected by the light guide reflection surface on one side on the reference plane. 基準面上において、他方側導光反射面で反射して光を出射させる様子を示す図４と同様の説明図である。It is the same explanatory view as FIG. 4 which shows a mode that light is emitted by being reflected by the light guide reflection surface on the other side on a reference plane. 基準面上で光を出射させる様子を示す図４と同様の説明図である。It is the same explanatory view as FIG. 4 which shows the state of emitting light on a reference plane. 図３の断面において光が出射される様子を示す説明図である。It is explanatory drawing which shows the state that light is emitted in the cross section of FIG. 車両用灯具の各出射箇所が点灯された様子を示す図１と同様の説明図である。It is the same explanatory view as FIG. 1 which shows the state in which each light emitting part of a vehicle lamp is turned on. 比較例において基準面上で光を出射させる様子を示す図５と同様の説明図である。It is the same explanatory view as FIG. 5 which shows the state of emitting light on a reference plane in a comparative example.

以下に、本開示に係る車両用灯具の一例としての車両用灯具１０の実施例１について図面を参照しつつ説明する。なお、図３は、図１のＩ−Ｉ線に沿って破断した端面に加えて、その奥行きの構成を中心投影法で示している。また、図４、図５および図９は、第１導光体１２における第１導光反射面３３の光学的な設定の把握を容易とするために、インナーレンズ１１の湾曲頂点１１ｂを導光方向の中央に位置させているが、必ずしも他の図や実際の構成と一致するものではない。さらに、図４は、各傾斜面３３ｂの構成の理解を容易とするために、部分的に拡大して示す４箇所の拡大箇所Ｅ１から拡大箇所Ｅ４を併せて示している。図８は、各第１レンズ反射面２５で反射されて第１レンズ出射面２４から光が出射される様子と、各第２レンズ反射面２８で反射されて第２レンズ出射面２７から光が出射される様子と、を出射光Ｌ１から出射光Ｌ５として矢印で示しているが、必ずしも実際の様子と一致するものではない。その図８は、各出射光Ｌ１からＬ５が進行する様子の把握を容易とするために、断面で示すインナーレンズ１１（第１レンズ部２１、第２レンズ部２２）におけるハッチを省略して示している。 Hereinafter, Example 1 of the vehicle lamp 10 as an example of the vehicle lamp according to the present disclosure will be described with reference to the drawings. Note that FIG. 3 shows the configuration of the depth of the end face broken along the line I-I of FIG. 1 by the central projection method. Further, in FIGS. 4, 5 and 9, in order to facilitate grasping the optical setting of the first light guide reflecting surface 33 in the first light guide body 12, the curved apex 11b of the inner lens 11 is guided. Although it is located in the center of the direction, it does not necessarily match other figures or the actual configuration. Further, FIG. 4 also shows four enlarged points E1 to E4 shown in a partially enlarged manner in order to facilitate understanding of the configuration of each inclined surface 33b. FIG. 8 shows a state in which light is reflected from each first lens reflecting surface 25 and emitted from the first lens emitting surface 24, and a state in which light is reflected by each second lens reflecting surface 28 and emitted from the second lens emitting surface 27. The state of being emitted is indicated by an arrow as the emitted light L1 to the emitted light L5, but it does not necessarily match the actual state. In FIG. 8, the hatches in the inner lens 11 (first lens unit 21, second lens unit 22) shown in cross section are omitted in order to facilitate grasping how each emitted light L1 to L5 progresses. ing.

本開示に係る車両用灯具の一実施形態に係る実施例１の車両用灯具１０を、図１から図１０を用いて説明する。車両用灯具１０は、自動車等の車両の灯具として用いられるもので、実施例１ではテールランプユニットに用いた例を示す。車両用灯具１０は、車両の後部の左右両側の灯室に配置されている。その灯室は、ランプハウジングの開放された端部がアウターレンズで覆われて形成されている。以下の説明では、図１に示すように、車両用灯具１０において、光を出射する方向を出射方向（図面ではＺとし、出射する側を前側とする）とし、車両に搭載された状態での鉛直方向を上下方向（図面ではＹとする）とし、出射方向および上下方向に直交する方向を幅方向（図面ではＸとする）とする。 The vehicle lamp 10 of the first embodiment according to the embodiment of the vehicle lamp according to the present disclosure will be described with reference to FIGS. 1 to 10. The vehicle lamp 10 is used as a lamp for a vehicle such as an automobile, and the first embodiment shows an example used for a tail lamp unit. The vehicle lighting equipment 10 is arranged in the light chambers on both the left and right sides of the rear part of the vehicle. The lamp chamber is formed by covering the open end of the lamp housing with an outer lens. In the following description, as shown in FIG. 1, in the vehicle lighting tool 10, the direction in which light is emitted is the emission direction (Z in the drawing, and the emission side is the front side), and the vehicle is mounted on the vehicle. The vertical direction is the vertical direction (referred to as Y in the drawing), and the direction orthogonal to the exit direction and the vertical direction is the width direction (referred to as X in the drawing).

車両用灯具１０は、図１および図２に示すように、インナーレンズ１１と、第１導光体１２と、第２導光体１３と、一対の第１光源１４と、一対の第２光源１５と、を備える。車両用灯具１０は、上記の符号１１から１５で示す各部材が、図１および図２に示す位置関係で組み付けられた状態で、適宜筐体に収容されて灯室に設けられる。なお、インナーレンズ１１は、灯室におけるアウターレンズとしてもよい。 As shown in FIGS. 1 and 2, the vehicle lamp 10 includes an inner lens 11, a first light guide body 12, a second light guide body 13, a pair of first light sources 14, and a pair of second light sources. 15 and. The vehicle lamp 10 is provided in the lamp chamber by being appropriately housed in a housing in a state in which the members indicated by the above reference numerals 11 to 15 are assembled in the positional relationship shown in FIGS. 1 and 2. The inner lens 11 may be used as an outer lens in the lighting room.

インナーレンズ１１は、光の透過を許す透明な樹脂材料で形成されており、例えばアクリル樹脂もしくはポリカーボネイト等の樹脂材料が用いられる。インナーレンズ１１は、第１レンズ部２１と、第２レンズ部２２と、を有する。第１レンズ部２１は、幅方向に延びる薄い板状とされ、第２レンズ部２２は、その第１レンズ部２１の上下方向の下側で同じく幅方向に延びる薄い板状とされている。インナーレンズ１１は、幅方向に直交する断面において、第１レンズ部２１と第２レンズ部２２との出射方向の前側の端部が接続されることで出射方向の前側に突出するレンズ稜線１１ａが形成され、略Ｌ字形状とされている（図３等参照）。このレンズ稜線１１ａは、幅方向でインナーレンズ１１の全長に亘って設けられている。また、インナーレンズ１１は、上下方向に直交する断面において、幅方向における中間位置が出射方向の前側へと最も突出するように湾曲されて、湾曲頂点１１ｂが形成されている（図４等参照）。 The inner lens 11 is made of a transparent resin material that allows light to pass through, and for example, a resin material such as acrylic resin or polycarbonate is used. The inner lens 11 has a first lens portion 21 and a second lens portion 22. The first lens portion 21 has a thin plate shape extending in the width direction, and the second lens portion 22 has a thin plate shape extending in the width direction below the first lens portion 21 in the vertical direction. The inner lens 11 has a cross section orthogonal to the width direction, and a lens ridge line 11a projecting to the front side in the exit direction is formed by connecting the front end portions of the first lens portion 21 and the second lens portion 22 in the emission direction. It is formed and has a substantially L-shape (see FIG. 3 and the like). The lens ridge line 11a is provided over the entire length of the inner lens 11 in the width direction. Further, the inner lens 11 is curved so that the intermediate position in the width direction protrudes most to the front side in the emission direction in a cross section orthogonal to the vertical direction, and a curved apex 11b is formed (see FIG. 4 and the like). ..

第１レンズ部２１は、図３に示すように、後側から前側へ向けて出射方向に沿って延びた後に、出射方向の前側に延びるに連れて上下方向の下側へ向かうように斜め下方へと延びるものとされている。第１レンズ部２１は、第１レンズ入射面２３と第１レンズ出射面２４と複数の第１レンズ反射面２５とを有する。 As shown in FIG. 3, the first lens unit 21 extends obliquely downward in the vertical direction as it extends from the rear side to the front side along the emission direction and then extends toward the front side in the emission direction. It is supposed to extend to. The first lens unit 21 has a first lens incident surface 23, a first lens emitting surface 24, and a plurality of first lens reflecting surfaces 25.

第１レンズ入射面２３は、第１レンズ部２１における出射方向の後側の端部に設けられている。第１レンズ入射面２３は、平坦な面とされており、第１導光体１２から出射された光を第１レンズ部２１内へと進行させる。第１レンズ出射面２４は、第１レンズ部２１において斜め下方へと延びる箇所における出射方向の前側の面とされている。この第１レンズ出射面２４は、インナーレンズ１１の全体形状に従って湾曲されており、幅方向における中間位置が湾曲頂点１１ｂとなる（図１、図４等参照）。各第１レンズ反射面２５は、第１レンズ部２１において斜め下方へと延びる箇所における出射方向の後側の面に設けられている。各第１レンズ反射面２５は、実施例１では上下方向で２つ（個別に述べる際には上から順に上側レンズ反射面２５ａ、下側レンズ反射面２５ｂとする）並列されている。その下側レンズ反射面２５ｂは、上下方向でレンズ稜線１１ａの近傍に形成されている（図３等参照）。各第１レンズ反射面２５は、幅方向で第１レンズ部２１の全長に亘り延びており、湾曲頂点１１ｂの近傍で互いの間隔が広がるように湾曲されている（図１等参照）。 The first lens incident surface 23 is provided at the rear end of the first lens unit 21 in the emission direction. The first lens incident surface 23 is a flat surface, and the light emitted from the first light guide body 12 is made to travel into the first lens unit 21. The first lens emitting surface 24 is a surface on the front side in the emitting direction at a portion of the first lens portion 21 extending obliquely downward. The first lens exit surface 24 is curved according to the overall shape of the inner lens 11, and the intermediate position in the width direction is the curved apex 11b (see FIGS. 1, 4, etc.). Each first lens reflecting surface 25 is provided on a surface rearward in the emitting direction at a portion of the first lens portion 21 extending obliquely downward. In the first embodiment, each of the first lens reflecting surfaces 25 is arranged in parallel in the vertical direction (when individually described, the upper lens reflecting surface 25a and the lower lens reflecting surface 25b are referred to in this order from the top). The lower lens reflecting surface 25b is formed in the vicinity of the lens ridge line 11a in the vertical direction (see FIG. 3 and the like). Each of the first lens reflecting surfaces 25 extends over the entire length of the first lens portion 21 in the width direction, and is curved so as to widen the distance between them in the vicinity of the curved apex 11b (see FIG. 1 and the like).

第１レンズ部２１は、第１レンズ入射面２３から入射された光を、全反射を利用して、出射方向の前側に導いた後に斜め下方へと導いて、各第１レンズ反射面２５へと進行させる。そして、第１レンズ部２１は、各第１レンズ反射面２５が全反射を利用して自らへと進行する光を第１レンズ出射面２４へ向けて反射し、それらの光を第１レンズ出射面２４から出射方向の前側へ向けて出射させる（図８参照）。なお、第１レンズ部２１は、第１レンズ入射面２３および第１レンズ出射面２４を除く面に蒸着や塗装等によりアルミや銀等を接着させることで光を反射させて、第１レンズ入射面２３から各第１レンズ反射面２５を経て第１レンズ出射面２４へと光を導くものであってもよい。 The first lens unit 21 guides the light incident from the first lens incident surface 23 to the front side in the emission direction and then diagonally downward to each first lens reflecting surface 25 by utilizing total reflection. And proceed. Then, in the first lens unit 21, each of the first lens reflecting surfaces 25 reflects the light traveling toward itself by utilizing total reflection toward the first lens emitting surface 24, and emits those lights to the first lens. The light is emitted from the surface 24 toward the front side in the emission direction (see FIG. 8). The first lens unit 21 reflects light by adhering aluminum, silver, or the like to the surfaces other than the first lens incident surface 23 and the first lens exit surface 24 by vapor deposition, painting, or the like, and the first lens is incident. Light may be guided from the surface 23 to the first lens emitting surface 24 via each first lens reflecting surface 25.

第２レンズ部２２は、図３に示すように、出射方向の後側から前側に向かうに連れて上下方向の上側へ向かうように斜め上方へと延びるものとされている。また、第２レンズ部２２は、幅方向の中間位置が出射方向の前側に突出するように湾曲されている。そして、第２レンズ部２２は、斜め上方へと延びた上端が、第１レンズ部２１における斜め下方へと延びた下端と連続されている。第２レンズ部２２は、第２レンズ入射面２６と第２レンズ出射面２７と複数の第２レンズ反射面２８とを有する。 As shown in FIG. 3, the second lens unit 22 is designed to extend obliquely upward so as to move upward in the vertical direction from the rear side in the emission direction toward the front side. Further, the second lens portion 22 is curved so that the intermediate position in the width direction protrudes to the front side in the emission direction. The upper end of the second lens portion 22 extending diagonally upward is continuous with the lower end extending obliquely downward in the first lens portion 21. The second lens unit 22 has a second lens incident surface 26, a second lens emitting surface 27, and a plurality of second lens reflecting surfaces 28.

第２レンズ入射面２６は、第２レンズ部２２における出射方向の後側の端部に設けられている。第２レンズ入射面２６は、同一平面上に位置する平坦な面とされつつ幅方向の中間位置が出射方向で最も前側となるとともに上下方向で最も下側となるように湾曲しており（図２参照）、第２導光体１３から出射された光を第２レンズ部２２内へと進行させる。第２レンズ出射面２７は、第２レンズ部２２における出射方向の前側の面とされている。この第２レンズ出射面２７は、インナーレンズ１１の全体形状に従って、幅方向における中間位置が湾曲頂点１１ｂとなる（図１、図４等参照）。各第２レンズ反射面２８は、第２レンズ部２２における出射方向の後側の面に設けられている。各第２レンズ反射面２８は、実施例１では上下方向で３つ（個別に述べる際には上から順に上側レンズ反射面２８ａ、中間レンズ反射面２８ｂ、下側レンズ反射面２８ｃとする）並列されている。各第２レンズ反射面２８は、幅方向で第２レンズ部２２の全長に亘り延びており、湾曲頂点１１ｂの近傍で互いの間隔が広がるように湾曲されている（図１等参照）。 The second lens incident surface 26 is provided at the rear end of the second lens unit 22 in the emission direction. The incident surface 26 of the second lens is a flat surface located on the same plane, and is curved so that the intermediate position in the width direction is the front side in the emission direction and the bottom side in the vertical direction (Fig.). 2), the light emitted from the second light guide 13 is advanced into the second lens unit 22. The second lens exit surface 27 is a surface on the front side of the second lens portion 22 in the emission direction. The second lens exit surface 27 has a curved apex 11b at an intermediate position in the width direction according to the overall shape of the inner lens 11 (see FIGS. 1, 4, etc.). Each second lens reflecting surface 28 is provided on the surface of the second lens unit 22 on the rear side in the emitting direction. In the first embodiment, each of the second lens reflecting surfaces 28 is arranged in parallel in the vertical direction (when individually described, the upper lens reflecting surface 28a, the intermediate lens reflecting surface 28b, and the lower lens reflecting surface 28c are used in this order from the top). Has been done. Each of the second lens reflecting surfaces 28 extends over the entire length of the second lens portion 22 in the width direction, and is curved so as to widen the distance between them in the vicinity of the curved apex 11b (see FIG. 1 and the like).

第２レンズ部２２は、第２レンズ入射面２６から入射された光を、全反射を利用して、斜め上方へと導いて各第２レンズ反射面２８へと進行させる。そして、第２レンズ部２２は、各第２レンズ反射面２８が全反射を利用して自らへと進行する光を第２レンズ出射面２７へ向けて反射し、それらの光を第２レンズ出射面２７から出射方向の前側へ向けて出射させる（図８参照）。なお、第２レンズ部２２は、第２レンズ入射面２６および第２レンズ出射面２７を除く面に蒸着や塗装等によりアルミや銀等を接着させることで光を反射させて、第２レンズ入射面２６から各第２レンズ反射面２８を経て第２レンズ出射面２７へと光を導くものであってもよい。 The second lens unit 22 guides the light incident from the second lens incident surface 26 diagonally upward by utilizing total reflection and advances the light to each second lens reflecting surface 28. Then, in the second lens unit 22, each second lens reflecting surface 28 reflects the light traveling toward itself by utilizing total reflection toward the second lens emitting surface 27, and emits the light to the second lens emitting surface 27. The light is emitted from the surface 27 toward the front side in the emission direction (see FIG. 8). The second lens unit 22 reflects light by adhering aluminum, silver, or the like to the surfaces other than the second lens incident surface 26 and the second lens exit surface 27 by vapor deposition, painting, or the like, and the second lens is incident. Light may be guided from the surface 26 to the second lens emitting surface 27 via each second lens reflecting surface 28.

第１導光体１２は、図１から図４に示すように、長尺な円柱状とされており、インナーレンズ１１の第１レンズ部２１の第１レンズ入射面２３に沿って設けられている。ここで、沿って設けられるとは、互いが伸びる方向が略一致するものであって、第１レンズ入射面２３と第１導光体１２（その第１導光出射面３１）とを対向させるものであれば、その両面（２１、３１）の間隔が位置によって異なるものとされていることも含む。第１導光体１２は、光の透過を許す透明な樹脂材料で形成されており、例えばアクリル樹脂もしくはポリカーボネイト等の樹脂材料が用いられる。第１導光体１２は、第１導光出射面３１と、一対の第１導光入射面３２と、第１導光反射面３３と、を有する。 As shown in FIGS. 1 to 4, the first light guide body 12 has a long columnar shape, and is provided along the first lens incident surface 23 of the first lens portion 21 of the inner lens 11. There is. Here, the term "provided along the line" means that the directions of extension thereof are substantially the same, and the first lens incident surface 23 and the first light guide body 12 (the first light guide emitting surface 31 thereof) face each other. If it is, it also includes that the distance between both sides (21, 31) is different depending on the position. The first light guide body 12 is formed of a transparent resin material that allows light to pass through, and for example, a resin material such as acrylic resin or polycarbonate is used. The first light guide body 12 has a first light guide exit surface 31, a pair of first light guide incident surfaces 32, and a first light guide reflection surface 33.

第１導光出射面３１は、第１導光体１２において、出射方向の前側であって、第１レンズ入射面２３に対向されている。第１導光出射面３１は、自らの軸線を中心として湾曲された湾曲面とされており、第１導光体１２内に導かれた光を第１レンズ入射面２３に向けて出射させる。 The first light guide emitting surface 31 is on the front side of the first light guide body 12 in the emitting direction and faces the first lens incident surface 23. The first light guide emission surface 31 is a curved surface that is curved around its own axis, and emits light guided into the first light guide body 12 toward the first lens incident surface 23.

両第１導光入射面３２は、長尺な第１導光体１２の両端部に設けられている。両第１導光入射面３２は、平坦な面とされ、対応する第１光源１４から出射された光を第１導光体１２内へと進行させる。なお、第１導光入射面３２は、個別に示す際には、第１導光体１２の一方の端部に設けられたものを一方側導光入射面３２Ａとし、第１導光体１２の他方の端部に設けられたものを他方側導光入射面３２Ｂとする。 Both first light guide incident surfaces 32 are provided at both ends of the long first light guide body 12. Both first light guide incident surfaces 32 are flat surfaces, and the light emitted from the corresponding first light source 14 is allowed to travel into the first light guide body 12. When the first light guide incident surface 32 is individually shown, the one provided at one end of the first light guide body 12 is referred to as the one side light guide incident surface 32A, and the first light guide body 12 The one provided at the other end of the light guide is referred to as the light guide incident surface 32B on the other side.

第１導光反射面３３は、第１導光体１２において、第１導光出射面３１から光が出射される向きとは反対側（出射方向の後側）に設けられている。第１導光反射面３３は、第１導光体１２内へと進行された光を、第１レンズ入射面２３へ向けて反射（全反射）する。第１導光反射面３３では、図４に示すように、第１導光体１２における第１導光出射面３１とは反対側の面に複数の突起３３ａが形成されている。各突起３３ａは、上下方向に直交する断面（図４を正面視した状態）で、三角形状とされており、その一辺が幅方向に対して傾斜された傾斜面３３ｂとされるとともに、残りの一辺が幅方向に対して起立された起立面３３ｃとされている。第１導光反射面３３は、第１導光体１２内を進行する光を、各傾斜面３３ｂが全反射することで、その光を第１レンズ入射面２３へ向けて反射する。 The first light guide reflecting surface 33 is provided on the first light guide body 12 on the side opposite to the direction in which light is emitted from the first light guide emission surface 31 (rear side in the emission direction). The first light guide reflecting surface 33 reflects (total reflection) the light traveling into the first light guide body 12 toward the incident surface 23 of the first lens. As shown in FIG. 4, the first light guide reflecting surface 33 has a plurality of protrusions 33a formed on the surface of the first light guide body 12 opposite to the first light guide emitting surface 31. Each protrusion 33a has a cross section orthogonal to the vertical direction (when viewed from the front in FIG. 4) and has a triangular shape, and one side thereof is an inclined surface 33b inclined with respect to the width direction, and the rest. One side is an upright surface 33c that is upright in the width direction. The first light guide reflecting surface 33 totally reflects the light traveling in the first light guide body 12 by each inclined surface 33b, so that the light is reflected toward the first lens incident surface 23.

第１導光反射面３３は、図４に示すように、幅方向で見て、第１レンズ出射面２４の湾曲頂点１１ｂと一致する位置を境界として一方側導光反射面３３Ａと他方側導光反射面３３Ｂとに分けられている。一方側導光反射面３３Ａは、幅方向で湾曲頂点１１ｂよりも一方側導光入射面３２Ａ側に位置しており、各傾斜面３３ｂが他方側導光入射面３２Ｂ側に向けられている（拡大箇所Ｅ１、Ｅ２参照）。このため、一方側導光反射面３３Ａは、他方側導光入射面３２Ｂ側から進行する光を第１レンズ入射面２３へ向けて反射する。また、他方側導光反射面３３Ｂは、湾曲頂点１１ｂよりも他方側導光入射面３２Ｂ側に位置しており、各傾斜面３３ｂが一方側導光入射面３２Ａ側に向けられている（拡大箇所Ｅ２からＥ４参照）。このため、他方側導光反射面３３Ｂは、一方側導光入射面３２Ａ側から進行する光を第１レンズ入射面２３へ向けて反射する。 As shown in FIG. 4, the first light guide reflection surface 33 has the one side light guide reflection surface 33A and the other side guide with a position corresponding to the curved apex 11b of the first lens exit surface 24 as a boundary when viewed in the width direction. It is divided into a light reflecting surface 33B. The one-side light guide reflection surface 33A is located closer to the one-side light guide incident surface 32A than the curved apex 11b in the width direction, and each inclined surface 33b is directed to the other side light guide incident surface 32B side (). See enlarged points E1 and E2). Therefore, the one-side light guide reflecting surface 33A reflects the light traveling from the other side light guide incident surface 32B toward the first lens incident surface 23. Further, the other side light guide reflecting surface 33B is located on the other side light guide incident surface 32B side with respect to the curved apex 11b, and each inclined surface 33b is directed to the one side light guide incident surface 32A side (enlarged). See points E2 to E4). Therefore, the other-side light guide reflecting surface 33B reflects the light traveling from the one-side light guide incident surface 32A toward the first lens incident surface 23.

加えて、実施例１の第１導光反射面３３は、傾斜面３３ｂの出射方向での大きさが、湾曲頂点１１ｂの近傍すなわち対応する第１導光入射面３２側に位置するものが最も小さくされ、湾曲頂点１１ｂから離れるに連れて漸次的に大きくされている（図４の拡大箇所Ｅ２からＥ４参照）。すなわち、一方側導光反射面３３Ａは、湾曲頂点１１ｂから一方側導光入射面３２Ａへと向かうに連れて、傾斜面３３ｂが漸次的に大きくされている。また、他方側導光反射面３３Ｂは、湾曲頂点１１ｂから他方側導光入射面３２Ｂへと向かうに連れて、傾斜面３３ｂが漸次的に大きくされている。この一方側導光反射面３３Ａおよび他方側導光反射面３３Ｂの光学的な設定については後述する。 In addition, the first light guide reflecting surface 33 of the first embodiment is most located in the vicinity of the curved apex 11b, that is, on the corresponding first light guide incident surface 32 side in the size of the inclined surface 33b in the exit direction. It is made smaller and gradually increased as it moves away from the curved apex 11b (see enlarged points E2 to E4 in FIG. 4). That is, the inclined surface 33b of the one-side light guide reflecting surface 33A is gradually increased toward the one-side light guide incident surface 32A from the curved apex 11b. Further, the inclined surface 33b of the other side light guide reflecting surface 33B is gradually increased toward the other side light guide incident surface 32B from the curved apex 11b. The optical settings of the one-side light guide reflection surface 33A and the other side light guide reflection surface 33B will be described later.

第１導光体１２は、両第１導光入射面３２から入射された光を、全反射を利用して幅方向へと進行させつつ第１導光反射面３３へと導く。このため、第１導光体１２は、自らが延びる幅方向が導光方向となり、そこに交差する上下方向が交差方向となる。そして、第１導光体１２は、一方側導光反射面３３Ａおよび他方側導光反射面３３Ｂが自らへと導かれた光を第１導光出射面３１へ向けて反射する。なお、第１導光体１２は、第１導光出射面３１および両第１導光入射面３２を除く面に蒸着や塗装等によりアルミや銀等を接着させることで光を反射させて、両第１導光入射面３２から第１導光反射面３３を経て第１導光出射面３１へと光を導くものであってもよい。 The first light guide body 12 guides the light incident from both first light guide incident surfaces 32 to the first light guide reflection surface 33 while advancing in the width direction by utilizing total reflection. Therefore, the width direction in which the first light guide body 12 extends is the light guide direction, and the vertical direction intersecting the first light guide body 12 is the intersection direction. Then, the first light guide body 12 reflects the light guided by the one-side light guide reflection surface 33A and the other side light guide reflection surface 33B toward the first light guide emission surface 31. The first light guide body 12 reflects light by adhering aluminum, silver, or the like to the surfaces other than the first light guide exit surface 31 and both first light guide incident surfaces 32 by vapor deposition, painting, or the like. Light may be guided from both the first light guide incident surfaces 32 to the first light guide exit surface 31 via the first light guide reflection surface 33.

第２導光体１３は、第１導光体１２と同様に長尺な円柱状とされており、インナーレンズ１１の第２レンズ部２２の第２レンズ入射面２６に沿って湾曲されて設けられている。第２導光体１３は、対応するものが第１レンズ入射面２３から第２レンズ入射面２６に替わることを除くと、第１導光体１２と同様の構成とされている。この第２導光体１３は、第２導光出射面３４と、一対の第２導光入射面３５（一方側導光入射面３５Ａ、他方側導光入射面３５Ｂ）と、第２導光反射面３６（湾曲頂点１１ｂの位置を境界とする一方側導光反射面３６Ａ、他方側導光反射面３６Ｂ）と、を有する。その一方側導光反射面３３Ａおよび他方側導光反射面３３Ｂは、一方側導光反射面３３Ａおよび他方側導光反射面３３Ｂと同様の光学的な設定とされている。 The second light guide body 13 has a long columnar shape like the first light guide body 12, and is provided so as to be curved along the second lens incident surface 26 of the second lens portion 22 of the inner lens 11. Has been done. The second light guide body 13 has the same configuration as the first light guide body 12, except that the corresponding one is changed from the first lens incident surface 23 to the second lens incident surface 26. The second light guide body 13 includes a second light guide exit surface 34, a pair of second light guide incident surfaces 35 (one side light guide incident surface 35A, the other side light guide incident surface 35B), and a second light guide. It has a reflecting surface 36 (one-sided light guide reflecting surface 36A and the other side light guide reflecting surface 36B having the position of the curved apex 11b as a boundary). The one-side light guide reflection surface 33A and the other side light guide reflection surface 33B have the same optical settings as the one-side light guide reflection surface 33A and the other side light guide reflection surface 33B.

第２導光体１３は、両第２導光入射面３５から入射された光を、全反射を利用して第２導光体１３が延びる方向に進行させつつ第２導光反射面３６へと導く。このため、第２導光体１３は、自らが延びる方向すなわち幅方向に対して湾曲された方向が導光方向となり、そこに交差する上下方向が交差方向となる。そして、第２導光体１３は、一方側導光反射面３３Ａおよび他方側導光反射面３３Ｂが自らへと導かれた光を第２導光出射面３４へ向けて反射する。なお、第２導光体１３は、第２導光出射面３４および両第２導光入射面３５を除く面に蒸着や塗装等によりアルミや銀等を接着させることで光を反射させて、両第２導光入射面３５から第２導光反射面３６を経て第２導光出射面３４へと光を導くものであってもよい。 The second light guide body 13 advances the light incident from both the second light guide incident surfaces 35 in the direction in which the second light guide body 13 extends by utilizing total reflection to the second light guide reflection surface 36. To lead. Therefore, the second light guide body 13 has a light guide direction in the direction in which it extends, that is, a direction curved with respect to the width direction, and a vertical direction intersecting the light guide body 13. Then, the second light guide body 13 reflects the light guided by the one-side light guide reflection surface 33A and the other side light guide reflection surface 33B toward the second light guide emission surface 34. The second light guide body 13 reflects light by adhering aluminum, silver, or the like to the surfaces other than the second light guide exit surface 34 and both second light guide incident surfaces 35 by vapor deposition, painting, or the like. Light may be guided from both the second light guide incident surfaces 35 to the second light guide exit surface 34 via the second light guide reflection surface 36.

一対の第１光源１４は、ＬＥＤ（Light Emitting Diode）等の発光素子で構成され、それぞれが第１基板４１に実装されている。各第１光源１４は、実施例１では、出射光軸を中心とするランバーシアン分布で、赤色の単色光（縦軸を光量とし横軸を波長としたグラフでピークが１つとなるもの）を出射する。各第１光源１４は、各第１導光入射面３２に対応して設けられており、出射光軸が対応する第１導光入射面３２に向けられている。なお、第１光源１４は、個別に示す際には、一方側導光入射面３２Ａに対応するものを一方側光源１４Ａとし、他方側導光入射面３２Ｂに対応するものを他方側光源１４Ｂとする。第１基板４１は、板状に形成されており、対応する第１光源１４が実装されている。 The pair of first light sources 14 are composed of light emitting elements such as LEDs (Light Emitting Diodes), and each of them is mounted on the first substrate 41. In the first embodiment, each first light source 14 has a Lambersian distribution centered on the emitted light axis, and emits red monochromatic light (a graph in which the vertical axis is the amount of light and the horizontal axis is the wavelength and has one peak). Exit. Each first light source 14 is provided corresponding to each first light guide incident surface 32, and the emitted light axis is directed to the corresponding first light guide incident surface 32. When the first light source 14 is individually shown, the one corresponding to the one-sided light guide incident surface 32A is referred to as the one side light source 14A, and the one corresponding to the other side light guide incident surface 32B is referred to as the other side light source 14B. To do. The first substrate 41 is formed in a plate shape, and the corresponding first light source 14 is mounted on the first substrate 41.

一対の第２光源１５は、ＬＥＤ等の発光素子で構成され、それぞれが第２基板４２に実装されている。各第２光源１５は、実施例１では、出射光軸を中心とするランバーシアン分布で、赤色の単色光を出射する。各第２光源１５は、各第１導光入射面３２に対応して設けられており、出射光軸が対応する第２導光入射面３５に向けられている。なお、第２光源１５は、個別に示す際には、一方側導光入射面３５Ａに対応するものを一方側光源１５Ａとし、他方側導光入射面３５Ｂに対応するものを他方側光源１５Ｂとする。第２基板４２は、板状に形成されており、対応する第２光源１５が実装されている。 The pair of second light sources 15 are composed of light emitting elements such as LEDs, and each of them is mounted on the second substrate 42. In the first embodiment, each of the second light sources 15 emits red monochromatic light with a Lambersian distribution centered on the emitted light axis. Each of the second light sources 15 is provided corresponding to each of the first light guide incident surfaces 32, and the emitted light axis is directed to the corresponding second light guide incident surface 35. When the second light source 15 is individually shown, the one corresponding to the one-side light guide incident surface 35A is referred to as the one side light source 15A, and the one corresponding to the other side light guide incident surface 35B is referred to as the other side light source 15B. To do. The second substrate 42 is formed in a plate shape, and the corresponding second light source 15 is mounted on the second substrate 42.

各第１基板４１は、点灯制御回路からの電力を自らに実装された第１光源１４に適宜供給することができ、その第１光源１４を適宜点灯させる。また、各第２基板４２は、点灯制御回路からの電力を自らに実装された第２光源１５に適宜供給することができ、その第２光源１５を適宜点灯させる。この各第１基板４１と各第２基板４２とは、それぞれに実装された光源（１３、１４）で発生する熱を外部に逃がすヒートシンク部材が適宜設けられる。なお、各第１基板４１と各第２基板４２とは、例えばアルミニウムのような熱伝導性の高い材料で形成することで、基板自身がヒートシンク部材としても機能するものとしてもよい。 Each first substrate 41 can appropriately supply the electric power from the lighting control circuit to the first light source 14 mounted on the first substrate 41, and appropriately lights the first light source 14. Further, each of the second substrates 42 can appropriately supply the electric power from the lighting control circuit to the second light source 15 mounted on the second substrate 42, and appropriately lights the second light source 15. Each of the first substrate 41 and each of the second substrate 42 is appropriately provided with a heat sink member that releases heat generated by the light sources (13, 14) mounted on the first substrate 41 to the outside. The first substrate 41 and the second substrate 42 may be formed of a material having high thermal conductivity such as aluminum, so that the substrate itself also functions as a heat sink member.

次に、第１導光反射面３３における一方側導光反射面３３Ａおよび他方側導光反射面３３Ｂの光学的な設定について、図５から図７を用いて説明する。一方側導光反射面３３Ａ（その各傾斜面３３ｂ）は、一方側導光入射面３２Ａから入射された一方側光源１４Ａからの光を第１レンズ入射面２３へ向けて反射し、他方側導光反射面３３Ｂ（その各傾斜面３３ｂ）は、他方側導光入射面３２Ｂから入射された他方側光源１４Ｂからの光を第１レンズ入射面２３へ向けて反射する。ここで、各第１光源１４からの光は、導光方向で対向する第１導光入射面３２から入射されて第１導光体１２内を進行するので、基本的に導光方向に進行する（導光方向のベクトル成分が大きい）。 Next, the optical settings of the one-side light guide reflection surface 33A and the other side light guide reflection surface 33B on the first light guide reflection surface 33 will be described with reference to FIGS. 5 to 7. The one-side light guide reflecting surface 33A (each inclined surface 33b thereof) reflects the light from the one-side light source 14A incident from the one-side light guide incident surface 32A toward the first lens incident surface 23, and conducts the other side. The light reflecting surface 33B (each inclined surface 33b thereof) reflects the light from the other side light source 14B incident from the other side light guide incident surface 32B toward the first lens incident surface 23. Here, since the light from each of the first light sources 14 is incident from the first light guide incident surface 32 facing in the light guide direction and travels in the first light guide body 12, it basically travels in the light guide direction. (The vector component in the light guide direction is large).

そして、第１導光体１２では、図６に示すように、一方側導光入射面３２Ａから入射されて導光方向に進行する光が、一部は一方側導光反射面３３Ａへと向かい、残りの多くは他方側導光反射面３３Ｂへと進行する。ここで、実施例１の第１導光反射面３３は、湾曲頂点１１ｂの近傍から離れるに連れて傾斜面３３ｂが漸次的に大きくされているので、一方側導光入射面３２Ａから入射されて直に他方側導光反射面３３Ｂへと進行する光の割合が高められている。また、一方側導光反射面３３Ａに向かった光は、その各起立面３３ｃから第１導光体１２の外方へ出射されるが、その多くは、自らが出射された起立面３３ｃと幅方向で対向する傾斜面３３ｂから各突起３３ａ内へと入射して第１導光体１２内を再び進行するので、結果として多くが他方側導光反射面３３Ｂへと進行する。これらのことから、第１導光体１２では、図５に示すように、一方側導光入射面３２Ａから入射された光の多くが、他方側導光反射面３３Ｂへと進行する。同様に、第１導光体１２では、図６に示すように、他方側導光入射面３２Ｂから入射された光の多くが、一方側導光反射面３３Ａへと進行する。 Then, in the first light guide body 12, as shown in FIG. 6, the light incident from the one-side light guide incident surface 32A and traveling in the light guide direction is partially directed to the one side light guide reflection surface 33A. Most of the rest proceeds to the light guide reflection surface 33B on the other side. Here, the first light guide reflecting surface 33 of the first embodiment is incident from the one side light guide incident surface 32A because the inclined surface 33b is gradually increased as the distance from the vicinity of the curved apex 11b is increased. The proportion of light that travels directly to the light guide reflecting surface 33B on the other side is increased. Further, the light directed to the one-side light guide reflecting surface 33A is emitted from each of the upright surfaces 33c to the outside of the first light guide body 12, but most of them are the width of the upright surface 33c from which they are emitted. Since it enters the projections 33a from the inclined surfaces 33b facing each other in the direction and travels in the first light guide body 12 again, most of the light travels to the other side light guide reflection surface 33B as a result. From these facts, in the first light guide body 12, as shown in FIG. 5, most of the light incident from the one-side light guide incident surface 32A travels to the other side light guide reflection surface 33B. Similarly, in the first light guide body 12, as shown in FIG. 6, most of the light incident from the light guide incident surface 32B on the other side travels to the light guide reflection surface 33A on the one side.

その一方側導光反射面３３Ａおよび他方側導光反射面３３Ｂ（その各傾斜面３３ｂ）は、第１導光体１２内で自らへと導かれた光におけるベクトル成分の平均値（以下では、光束Ｌとする）を対象として、傾斜度合いが設定されている。ここで、第１導光反射面３３は、自らへと進行する光束Ｌを各傾斜面３３ｂで反射するので、複数の光束Ｌを第１導光出射面３１からインナーレンズ１１へ向けて進行させる。 The one-side light guide reflection surface 33A and the other side light guide reflection surface 33B (each inclined surface 33b thereof) are average values of vector components in the light guided to themselves in the first light guide body 12 (hereinafter, in the following,). The degree of inclination is set for the light flux L). Here, since the first light guide reflecting surface 33 reflects the light flux L traveling toward itself on each inclined surface 33b, a plurality of light fluxes L are moved from the first light guide emitting surface 31 toward the inner lens 11. ..

ここで、第１レンズ出射面２４は、インナーレンズ１１の全体形状に従って湾曲頂点１１ｂを形成するように湾曲されており、第１導光体１２の導光方向に対して湾曲されている。その導光方向に対して湾曲されるとは、導光方向に延びる第１導光体１２（その第１導光出射面３１）から第１レンズ出射面２４までの間隔が、導光方向での位置によって変化していることを言う。このため、第１レンズ出射面２４は、上下方向に直交する基準面上において湾曲頂点１１ｂを頂点とする凸レンズとして機能することとなり、第１レンズ出射面２４の傾斜の度合いに応じて各光束Ｌの屈折の態様が変化する。 Here, the first lens exit surface 24 is curved so as to form a curved apex 11b according to the overall shape of the inner lens 11, and is curved with respect to the light guide direction of the first light guide body 12. Curved with respect to the light guide direction means that the distance from the first light guide body 12 (the first light guide emission surface 31 thereof) extending in the light guide direction to the first lens exit surface 24 is the distance in the light guide direction. It says that it changes depending on the position of. Therefore, the first lens emitting surface 24 functions as a convex lens having the curved apex 11b as the apex on the reference surface orthogonal to the vertical direction, and each light beam L depends on the degree of inclination of the first lens emitting surface 24. The mode of refraction of the lens changes.

そして、第１導光反射面３３は、上下方向に直交する基準面上において、インナーレンズ１１の第１レンズ部２１の第１レンズ出射面２４の全体に分散させつつ互いに平行として第１レンズ出射面２４から各光束Ｌを出射させるように、各傾斜面３３ｂの傾斜度合いが設定される。その各傾斜面３３ｂの傾斜度合いは、第１導光体１２の第１導光出射面３１、インナーレンズ１１の第１レンズ入射面２３および第１レンズ出射面２４での屈折を勘案して設定される。 Then, the first light guide reflecting surface 33 emits the first lens as parallel to each other while being dispersed over the entire first lens emitting surface 24 of the first lens portion 21 of the inner lens 11 on the reference plane orthogonal to the vertical direction. The degree of inclination of each inclined surface 33b is set so that each light beam L is emitted from the surface 24. The degree of inclination of each inclined surface 33b is set in consideration of refraction at the first light guide emitting surface 31 of the first light guide body 12, the first lens incident surface 23 of the inner lens 11, and the first lens emitting surface 24. Will be done.

詳細には、一方側導光反射面３３Ａは、図５に示すように、他方側導光入射面３２Ｂから入射された他方側光源１４Ｂからの各光束Ｌを、一方側導光入射面３２Ａ側に傾けつつ第１レンズ出射面２４における湾曲頂点１１ｂよりも一方側導光入射面３２Ａ側の全体に分散させて反射するように、各傾斜面３３ｂの傾斜の度合いが設定される。また、他方側導光反射面３３Ｂは、図６に示すように、一方側導光入射面３２Ａから入射された一方側光源１４Ａからの各光束Ｌを、他方側導光入射面３２Ｂ側に傾けつつ第１レンズ出射面２４における湾曲頂点１１ｂよりも他方側導光入射面３２Ｂ側の全体に分散させて反射するように、各傾斜面３３ｂの傾斜の度合いが設定される。すなわち、第１導光反射面３３は、図７に示すように、幅方向において、第１レンズ出射面２４の湾曲頂点１１ｂと一致する位置を中心として、全体に分散させて発散させつつ湾曲頂点１１ｂから遠ざかるに連れて発散させる角度が大きくなるように、各傾斜面３３ｂの傾斜の度合いが設定されている。これにより、第１導光反射面３３は、基準面上において、インナーレンズ１１の第１レンズ部２１の第１レンズ出射面２４の全体に分散させつつ互いに平行として第１レンズ出射面２４から各光束Ｌを出射させる。 Specifically, as shown in FIG. 5, the one-side light guide reflecting surface 33A displays each light beam L from the other side light source 14B incident from the other side light guide incident surface 32B on the one side light guide incident surface 32A side. The degree of inclination of each inclined surface 33b is set so as to be dispersed and reflected on the entire side of the light guide incident surface 32A on one side of the curved apex 11b on the first lens emitting surface 24 while being inclined to. Further, as shown in FIG. 6, the other-side light guide reflecting surface 33B tilts each light beam L from the one-side light source 14A incident from the one-side light guide incident surface 32A toward the other side light guide incident surface 32B. At the same time, the degree of inclination of each inclined surface 33b is set so as to disperse and reflect the light light incident surface 32B on the other side of the curved apex 11b on the first lens emitting surface 24. That is, as shown in FIG. 7, the first light guide reflecting surface 33 has a curved apex while being dispersed and diverged over the entire position centered on a position corresponding to the curved apex 11b of the first lens emitting surface 24 in the width direction. The degree of inclination of each inclined surface 33b is set so that the angle of divergence increases as the distance from 11b increases. As a result, the first light guide reflecting surface 33 is dispersed on the reference surface over the entire first lens emitting surface 24 of the first lens portion 21 of the inner lens 11 and is parallel to each other from the first lens emitting surface 24. The luminous flux L is emitted.

次に、この車両用灯具１０の作用について説明する。車両用灯具１０は、両第１基板４１および両第２基板４２を介して点灯制御回路からの電力を両第１光源１４および両第２光源１５に適宜供給することで、両第１光源１４および両第２光源１５を点灯させる。 Next, the operation of the vehicle lamp 10 will be described. The vehicle lamp 10 appropriately supplies electric power from the lighting control circuit to both the first light source 14 and the second light source 15 via the first substrate 41 and the second substrate 42, so that the first light source 14 is used. And both second light sources 15 are turned on.

すると、一方側光源１４Ａから出射された光は、図６に示すように、対応する一方側導光入射面３２Ａから入射されて、第１導光体１２内を導光方向に進行して他方側導光反射面３３Ｂへと向かう。また、他方側光源１４Ｂから出射された光は、図５に示すように、対応する他方側導光入射面３２Ｂから入射されて、第１導光体１２内を導光方向に進行して一方側導光反射面３３Ａへと向かう。それらの光は、図７に示すように、一方側導光反射面３３Ａまたは他方側導光反射面３３Ｂにより第１導光出射面３１へ向けて反射され、その第１導光出射面３１から第１導光体１２の外側へと出射されて、インナーレンズ１１の第１レンズ部２１の第１レンズ入射面２３へ向けて進行する。 Then, as shown in FIG. 6, the light emitted from the one-side light source 14A is incident from the corresponding one-side light guide incident surface 32A, travels in the first light guide body 12 in the light guide direction, and travels in the light guide direction to the other. It goes to the side light guide reflection surface 33B. Further, as shown in FIG. 5, the light emitted from the other side light source 14B is incident from the corresponding other side light guide incident surface 32B and travels in the first light guide body 12 in the light guide direction. It goes toward the side light guide reflection surface 33A. As shown in FIG. 7, the light is reflected toward the first light guide emission surface 31 by the one-side light guide reflection surface 33A or the other side light guide reflection surface 33B, and is reflected from the first light guide emission surface 31. It is emitted to the outside of the first light guide body 12 and travels toward the first lens incident surface 23 of the first lens portion 21 of the inner lens 11.

その光は、第１レンズ入射面２３から入射されて、図８に示すように、第１レンズ部２１内を出射方向の前側へと導かれた後に斜め下方へと導かれて、上側レンズ反射面２５ａや下側レンズ反射面２５ｂへ向けて進行する。その光は、一部が上側レンズ反射面２５ａで反射されて第１レンズ出射面２４から出射され（出射光Ｌ１）、他部の多くが下側レンズ反射面２５ｂで反射されて第１レンズ出射面２４から出射される（出射光Ｌ２）。このため、第１レンズ入射面２３では、出射光Ｌ１が出射される箇所と出射光Ｌ２が出射される箇所とが出射箇所４３（個別に述べる際には上から順に第１出射箇所４３ａ、第２出射箇所４３ｂとする）となる。ここで、第１導光体１２では、第１導光反射面３３により、各第１レンズ反射面２５で反射された光が、基準面上において、第１レンズ出射面２４の全体に各光束Ｌが分散されつつ各光束Ｌが互いに平行として出射される。このため、第１レンズ部２１は、出射方向の前側から見ると、第１レンズ出射面２４において上下方向で並列する２本の出射箇所４３ａ、４３ｂが全長に亘って略等しい明るさで光って見える（図９参照）。 The light is incident from the incident surface 23 of the first lens, and as shown in FIG. 8, is guided in the first lens portion 21 toward the front side in the exit direction and then diagonally downward, and is reflected by the upper lens. It proceeds toward the surface 25a and the lower lens reflecting surface 25b. Part of the light is reflected by the upper lens reflecting surface 25a and emitted from the first lens emitting surface 24 (emitted light L1), and most of the other portion is reflected by the lower lens reflecting surface 25b and emitted from the first lens. It is emitted from the surface 24 (emitted light L2). Therefore, on the first lens incident surface 23, the portion where the emitted light L1 is emitted and the portion where the emitted light L2 is emitted are the emitted points 43 (when individually described, the first emitted points 43a and the first emitted points 43a in order from the top). 2 The exit point 43b). Here, in the first light guide body 12, the light reflected by each of the first lens reflecting surfaces 25 by the first light guide reflecting surface 33 is the luminous flux on the entire first lens emitting surface 24 on the reference surface. While L is dispersed, each light flux L is emitted as being parallel to each other. Therefore, when viewed from the front side in the emission direction of the first lens unit 21, the two emission points 43a and 43b parallel to each other in the vertical direction on the emission surface 24 of the first lens shine with substantially the same brightness over the entire length. It is visible (see FIG. 9).

また、一方側光源１５Ａから出射された光は、図６に示すように、対応する一方側導光入射面３５Ａから入射されて、第２導光体１３内を導光方向に進行して他方側導光反射面３６Ｂへと向かう。また、他方側光源１５Ｂから出射された光は、図５に示すように、対応する他方側導光入射面３５Ｂから入射されて、第２導光体１３内を導光方向に進行して一方側導光反射面３６Ａへと向かう。それらの光は、図７に示すように、一方側導光反射面３６Ａまたは他方側導光反射面３６Ｂにより第２導光出射面３４へ向けて反射され、その第２導光出射面３４から第２導光体１３の外側へと出射されて、インナーレンズ１１の第２レンズ部２２の第２レンズ入射面２６へ向けて進行する。 Further, as shown in FIG. 6, the light emitted from the one-side light source 15A is incident from the corresponding one-side light guide incident surface 35A, travels in the second light guide 13 in the light guide direction, and travels in the light guide direction to the other. It goes to the side light guide reflection surface 36B. Further, as shown in FIG. 5, the light emitted from the other side light source 15B is incident from the corresponding other side light guide incident surface 35B and travels in the second light guide body 13 in the light guide direction. It goes toward the side light guide reflection surface 36A. As shown in FIG. 7, the light is reflected toward the second light guide emission surface 34 by the one-side light guide reflection surface 36A or the other side light guide reflection surface 36B, and is reflected from the second light guide emission surface 34. It is emitted to the outside of the second light guide body 13 and travels toward the second lens incident surface 26 of the second lens portion 22 of the inner lens 11.

その光は、第２レンズ入射面２６から入射されて、図８に示すように、第２レンズ部２２内を斜め上方へと導かれて、下側レンズ反射面２８ｃや中間レンズ反射面２８ｂや上側レンズ反射面２８ａへ向けて進行する。その光は、一部が下側レンズ反射面２８ｃで反射されて第２レンズ出射面２７から出射され（出射光Ｌ５）、その他の一部が中間レンズ反射面２８ｂで反射されて第２レンズ出射面２７から出射され（出射光Ｌ４）、残りの多くが上側レンズ反射面２８ａで反射されて第２レンズ出射面２７から出射される（出射光Ｌ３）。このため、第２レンズ出射面２７では、出射光Ｌ３が出射される箇所と出射光Ｌ４が出射される箇所と出射光Ｌ５が出射される箇所とが出射箇所４３（個別に述べる際には上から順に第３出射箇所４３ｃ、第４出射箇所４３ｄ、第５出射箇所４３ｅとする）となる。ここで、第２導光体１３では、第２導光反射面３６により、各第２レンズ反射面２８で反射された光が、基準面上において、第２レンズ出射面２７の全体に各光束Ｌが分散されつつ互いに平行として出射される。このため、第２レンズ部２２は、図９に示すように、出射方向の前側から見ると、第２レンズ出射面２７において上下方向で並列する３本の出射箇所４３ｃ、４３ｄ、４３ｅが全長に亘って略等しい明るさで光って見える。 The light is incident from the second lens incident surface 26 and is guided obliquely upward in the second lens portion 22 as shown in FIG. 8, and the lower lens reflecting surface 28c, the intermediate lens reflecting surface 28b, and the like. It advances toward the upper lens reflecting surface 28a. Part of the light is reflected by the lower lens reflecting surface 28c and emitted from the second lens emitting surface 27 (emitted light L5), and the other part is reflected by the intermediate lens reflecting surface 28b and emitted from the second lens. It is emitted from the surface 27 (emission light L4), and most of the rest is reflected by the upper lens reflection surface 28a and emitted from the second lens emission surface 27 (emission light L3). Therefore, on the second lens exit surface 27, the location where the emission light L3 is emitted, the location where the emission light L4 is emitted, and the location where the emission light L5 is emitted are the emission points 43 (the above when individually described). The third exit point 43c, the fourth exit point 43d, and the fifth exit point 43e are used in this order. Here, in the second light guide body 13, the light reflected by the second light guide reflecting surface 36 by each of the second lens reflecting surfaces 28 is the luminous flux on the entire second lens emitting surface 27 on the reference surface. L is emitted as being parallel to each other while being dispersed. Therefore, as shown in FIG. 9, the second lens unit 22 has three emission points 43c, 43d, 43e parallel to each other in the vertical direction on the second lens emission surface 27 when viewed from the front side in the emission direction. It appears to shine with almost equal brightness over the entire range.

このため、車両用灯具１０は、両第１光源１４および両第２光源１５を点灯させることで、図９に示すように、インナーレンズ１１のレンズ出射面（第１レンズ出射面２４および第２レンズ出射面２７）において、上下方向で並列する５本の出射箇所４３（４３ａから４３ｅ）を全長に亘って略等しい明るさで赤く光らせることができる。その各出射箇所４３は、透明な樹脂材料で形成されたインナーレンズ１１において上記のように設けられているので、空間に赤い線状（ライン）として浮いているように見える。これにより、車両用灯具１０は、意匠性に優れたテールランプとして機能させることができる。 Therefore, as shown in FIG. 9, the vehicle lamp 10 lights the first light source 14 and the second light source 15, and as shown in FIG. 9, the lens emitting surface (first lens emitting surface 24 and second) of the inner lens 11 is turned on. On the lens exit surface 27), the five emission points 43 (43a to 43e) arranged in parallel in the vertical direction can be made to shine red with substantially equal brightness over the entire length. Since each of the exit points 43 is provided as described above in the inner lens 11 made of a transparent resin material, it appears to float as a red line in the space. As a result, the vehicle lamp 10 can function as a tail lamp having excellent design.

ここで、比較例としての車両用灯具１を図１０に示す。この車両用灯具１は、第１導光体１２の第１導光反射面３３Ｐおよび第２導光体１３の第２導光反射面３６Ｐの光学的な設定を車両用灯具１０とは異なるものとしたものであり、そのことを除くと、基本的に車両用灯具１０と同様の構成であるので、等しい構成の個所には同じ符号を付し、詳細な説明は省略する。また、第１導光反射面３３Ｐと第２導光反射面３６Ｐとは、車両用灯具１０と同様に、互いに等しい光学的な設定とされているので、第１導光反射面３３Ｐについて説明し、第２導光反射面３６Ｐに関しては省略する。 Here, a vehicle lamp 1 as a comparative example is shown in FIG. The vehicle lamp 1 has different optical settings from the vehicle lamp 10 in the optical settings of the first light guide reflecting surface 33P of the first light guide 12 and the second light guide reflecting surface 36P of the second light guide 13. Except for this, the configuration is basically the same as that of the vehicle lamp 10, so the same reference numerals are given to the parts having the same configuration, and detailed description thereof will be omitted. Further, since the first light guide reflecting surface 33P and the second light guide reflecting surface 36P are set to have the same optical settings as the vehicle lamp 10, the first light guide reflecting surface 33P will be described. , The second light guide reflection surface 36P will be omitted.

車両用灯具１では、導光方向の全体に亘って各光束Ｌを分散させるために、第１導光反射面３３Ｐが、両第１導光入射面３２から入射されて第１導光体１２内に導かれた各光束Ｌを、互いに平行として第１導光出射面３１へ向けて反射させるものとしている。すると、各光束Ｌは、互いに平行なまま第１導光出射面３１から出射されて、第１レンズ入射面２３から入射してインナーレンズ１１の第１レンズ部２１内に導光方向の全体に亘って分散された状態で導かれる。ここで、第１レンズ出射面２４は、第１導光体１２の導光方向に対して湾曲されることで、上下方向に直交する基準面上において湾曲頂点１１ｂを頂点とする凸レンズとして機能する。このため、第１レンズ部２１内に導かれた各光束Ｌは、第１レンズ出射面２４から出射される際に屈折されることで、基準面上で第１レンズ出射面２４の湾曲頂点１１ｂへと近付くように集光されてしまう。このため、車両用灯具１は、インナーレンズ１１のレンズ出射面における各出射箇所４３では、湾曲頂点１１ｂの近傍が最も明るくなるとともに、導光方向での両端に向かうに連れて暗くなり、導光方向での明るさの差異が生じてしまう。 In the vehicle lighting tool 1, in order to disperse each light flux L over the entire light guide direction, the first light guide reflecting surface 33P is incident from both first light guide incident surfaces 32 and the first light guide body 12 The light fluxes L guided inward are reflected toward the first light guide emitting surface 31 in parallel with each other. Then, each light flux L is emitted from the first light guide emitting surface 31 while being parallel to each other, incident from the first lens incident surface 23, and enters the first lens portion 21 of the inner lens 11 in the entire light guide direction. It is guided in a dispersed state. Here, the first lens exit surface 24 functions as a convex lens having a curved apex 11b as an apex on a reference plane orthogonal to the vertical direction by being curved with respect to the light guide direction of the first light guide body 12. .. Therefore, each luminous flux L guided into the first lens unit 21 is refracted when emitted from the first lens emitting surface 24, so that the curved apex 11b of the first lens emitting surface 24 is on the reference plane. It will be condensed so that it approaches. For this reason, in the vehicle lamp 1, at each emission point 43 on the lens emission surface of the inner lens 11, the vicinity of the curved apex 11b becomes the brightest, and the light becomes darker toward both ends in the light guide direction. There will be a difference in brightness in the direction.

これに対して、実施例１の車両用灯具１０は、第１導光体１２の第１導光反射面３３（第２導光体１３の第２導光反射面３６）が上記のように光学的に設定されているので、基準面上において第１レンズ出射面２４の全体に分散させつつ互いに平行として第１レンズ出射面２４から各光束Ｌを出射させる。このため、車両用灯具１０は、インナーレンズ１１のレンズ出射面（第１レンズ出射面２４および第２レンズ出射面２７）を導光体（第１導光体１２および第２導光体１３）の導光方向に対して湾曲させていても、その出射面の各出射箇所４３を全長に亘って略等しい明るさで光らせることができる。 On the other hand, in the vehicle lighting fixture 10 of the first embodiment, the first light guide reflecting surface 33 of the first light guide 12 (the second light guide reflecting surface 36 of the second light guide 13) is as described above. Since it is set optically, each light beam L is emitted from the first lens emitting surface 24 so as to be parallel to each other while being dispersed over the entire first lens emitting surface 24 on the reference surface. Therefore, in the vehicle lighting fixture 10, the lens emitting surface (first lens emitting surface 24 and the second lens emitting surface 27) of the inner lens 11 is a light guide body (first light guide body 12 and second light guide body 13). Even if it is curved with respect to the light guide direction of the lens, each emission portion 43 of the emission surface can be illuminated with substantially equal brightness over the entire length.

また、車両用灯具１０は、インナーレンズ１１の第１レンズ部２１において、下側の下側レンズ反射面２５ｂを上下方向でレンズ稜線１１ａの近傍に形成している(図３等参照)。このため、車両用灯具１０は、第１レンズ出射面２４や第２レンズ出射面２７において、各出射箇所４３として設定した本数以上の箇所が線状に光ることを防止できる。この理由は、以下の通りである。第１レンズ部２１では、図８に示すように、第１レンズ入射面２３から入射された光の大部分を上側レンズ反射面２５ａまたは下側レンズ反射面２５ｂで反射して第１レンズ出射面２４の各出射箇所４３から出射させているが、その光の一部はレンズ稜線１１ａの近傍に進行する。同様に、第２レンズ部２２では、第２レンズ入射面２６から入射された光の一部はレンズ稜線１１ａの近傍に進行する。 Further, in the vehicle lighting fixture 10, in the first lens portion 21 of the inner lens 11, the lower lower lens reflecting surface 25b is formed in the vertical direction in the vicinity of the lens ridge line 11a (see FIG. 3 and the like). Therefore, the vehicle lighting fixture 10 can prevent the first lens exit surface 24 and the second lens exit surface 27 from shining linearly in more than the number of locations set as each emission location 43. The reason for this is as follows. As shown in FIG. 8, the first lens unit 21 reflects most of the light incident from the first lens incident surface 23 on the upper lens reflecting surface 25a or the lower lens reflecting surface 25b, and the first lens emitting surface. Although it is emitted from each emission point 43 of 24, a part of the light travels in the vicinity of the lens ridge line 11a. Similarly, in the second lens unit 22, a part of the light incident from the incident surface 26 of the second lens travels in the vicinity of the lens ridge line 11a.

このため、インナーレンズ１１では、第１レンズ出射面２４および第２レンズ出射面２７の繋ぎ目となるレンズ稜線１１ａの周辺領域Ａｐが、上記の第１レンズ部２１や第２レンズ部２２で導かれた光の一部により光ってしまう。換言すると、両レンズ部（２４、２７）の繋ぎ目の周辺領域Ａｐは、上記のように光る領域である。特に、実施例１のインナーレンズ１１は、第１レンズ部２１と第２レンズ部２２とが略Ｌ字形状に並べられているので、周辺領域Ａｐが光ることを完全に防止することは困難である。すると、インナーレンズ１１のレンズ出射面では、レンズ稜線１１ａの周辺領域Ａｐが線状に光る虞があり、設定した５本の各出射箇所４３に加えて、周辺領域Ａｐが６本目の出射箇所のようになる虞がある。ところが、周辺領域Ａｐは、上記のように意図しない光によりレンズ稜線１１ａの近傍が光るものであるので、明るさや光り方等を制御することができず、各出射箇所４３とは異なり暗くぼんやりした見た目となって違和感を与えてしまう。 Therefore, in the inner lens 11, the peripheral region Ap of the lens ridge line 11a, which is the joint between the first lens emitting surface 24 and the second lens emitting surface 27, is guided by the first lens portion 21 and the second lens portion 22. It shines due to a part of the shining light. In other words, the peripheral region Ap at the joint of both lens portions (24, 27) is a region that shines as described above. In particular, in the inner lens 11 of the first embodiment, since the first lens portion 21 and the second lens portion 22 are arranged in a substantially L shape, it is difficult to completely prevent the peripheral region Ap from shining. is there. Then, on the lens exit surface of the inner lens 11, the peripheral region Ap of the lens ridge line 11a may shine linearly, and in addition to the set five exit locations 43, the peripheral region Ap is the sixth exit location. There is a risk that it will become. However, in the peripheral region Ap, since the vicinity of the lens ridge line 11a shines due to unintended light as described above, it is not possible to control the brightness, the way of shining, etc. It looks strange and gives a sense of discomfort.

そこで、車両用灯具１０は、上下方向において、下側の下側レンズ反射面２５ｂをレンズ稜線１１ａの近傍に形成することで、第１レンズ出射面２４の第２出射箇所４３ｂの少なくとも一部を周辺領域Ａｐに重複させている。換言すると、下側レンズ反射面２５ｂを形成するレンズ稜線１１ａの近傍とは、出射方向で見て少なくとも一部が周辺領域Ａｐに重複する位置となる。このため、車両用灯具１０は、インナーレンズ１１のレンズ出射面における周辺領域Ａｐが光った場合であっても、第２出射箇所４３ｂが光っているものとして認識させることができ、各出射箇所４３として設定した本数以上の箇所が線状に光ることを防止できる。加えて、車両用灯具１０は、周辺領域Ａｐが光った場合であっても、周辺領域Ａｐに重ねられた第２出射箇所４３ｂを見せることができるので、他の４本の出射箇所４３ａ、４３ｃ、４３ｄ、４３ｅとの差異を大幅に抑えることができる。 Therefore, in the vehicle lamp 10, the lower lens reflecting surface 25b on the lower side is formed in the vicinity of the lens ridge line 11a in the vertical direction, so that at least a part of the second emitting portion 43b of the first lens emitting surface 24 is formed. It overlaps with the peripheral area Ap. In other words, the vicinity of the lens ridge line 11a forming the lower lens reflecting surface 25b is a position where at least a part overlaps with the peripheral region Ap when viewed in the emission direction. Therefore, the vehicle lamp 10 can recognize that the second emission portion 43b is shining even when the peripheral region Ap on the lens exit surface of the inner lens 11 is shining, and each emission portion 43 can be recognized. It is possible to prevent more than the number of points set as as from shining linearly. In addition, the vehicle lighting fixture 10 can show the second emission portion 43b superimposed on the peripheral region Ap even when the peripheral region Ap shines, so that the other four emission portions 43a and 43c can be shown. , 43d, 43e can be significantly suppressed.

実施例１の車両用灯具１０は、以下の各作用効果を得ることができる。 The vehicle lamp 10 of the first embodiment can obtain the following effects.

車両用灯具１０は、インナーレンズ１１と導光体（１２、１３）と光源（１４、１５）とを備える。インナーレンズ１１は、レンズ入射面（２３、２６）とレンズ出射面（２４、２７）とを有する。導光体は、導光方向に延びて設けられ、導光方向の端部の導光入射面（３２、３５）と、レンズ入射面に対向する導光出射面（３１、３４）と、導光出射面（３１、３４）から出射される向きとは反対側の導光反射面（３３、３６）と、を有する。光源は、導光体の導光入射面に対向して設けられ、レンズ出射面は、導光方向に対して湾曲されている。車両用灯具１０は、導光体（１２、１３）の両端を一方側導光入射面（３２Ａ、３５Ａ）および他方側導光入射面（３２Ｂ、３５Ｂ）とし、その一方側導光入射面に一方側光源（１４Ａ、１５Ａ）をかつ他方側導光入射面に他方側光源（１４Ｂ、１５Ｂ）をそれぞれ対応させる。また、車両用灯具１０は、導光反射面が、一方側導光入射面側に位置し、他方側光源から出射されて他方側導光入射面から入射した光を導光出射面へ向けて反射する一方側導光反射面（３３Ａ、３６Ａ）と、他方側導光入射面側に位置し、一方側光源から出射されて一方側導光入射面から入射した光を導光出射面へ向けて反射する他方側導光反射面（３３Ｂ、３６Ｂ）と、を有する。このため、車両用灯具１０は、導光方向で光が入射する導光入射面とは反対側の導光反射面で導光出射面へ向けて反射するので、入射された光を簡易な構成で無理なく導光出射面へと反射できる。このため、車両用灯具１０は、導光反射面をより簡易な構成としつつ幅方向の全体に亘りより適切に光を行き亘らせることができ、レンズ出射面をよりムラなくかつ明るく光らせることができる。 The vehicle lamp 10 includes an inner lens 11, a light guide body (12, 13), and a light source (14, 15). The inner lens 11 has a lens entrance surface (23, 26) and a lens exit surface (24, 27). The light guide body is provided so as to extend in the light guide direction, and guides the light guide incident surface (32, 35) at the end in the light guide direction and the light guide exit surface (31, 34) facing the lens incident surface. It has a light guide reflecting surface (33, 36) on the side opposite to the direction in which the light is emitted from the light emitting surface (31, 34). The light source is provided so as to face the light guide incident surface of the light guide body, and the lens exit surface is curved with respect to the light guide direction. In the vehicle lighting equipment 10, both ends of the light guide body (12, 13) are set as one side light guide incident surface (32A, 35A) and the other side light guide incident surface (32B, 35B), and the one side light guide incident surface is used. One side light source (14A, 15A) is associated with the other side light guide incident surface, and the other side light source (14B, 15B) is associated with the other side light guide incident surface, respectively. Further, in the vehicle lighting tool 10, the light guide reflecting surface is located on the one side light guide incident surface side, and the light emitted from the other side light source and incident from the other side light guide incident surface is directed to the light guide emission surface. It is located on the one-sided light guide reflecting surface (33A, 36A) that reflects and the other side light guide incident surface side, and directs the light emitted from the one side light source and incident from the one side light guide incident surface toward the light guide emitting surface. It has a light guide reflecting surface (33B, 36B) on the other side that reflects light. Therefore, the vehicle lighting tool 10 reflects the incident light toward the light guide emitting surface on the light guide reflecting surface opposite to the light guide incident surface on which the light is incident in the light guide direction, so that the incident light is simply configured. It can be reflected to the light guide emitting surface without difficulty. For this reason, the vehicle lamp 10 can more appropriately distribute light over the entire width direction while having a simpler structure for the light guide reflecting surface, and makes the lens emitting surface shine more evenly and brightly. Can be done.

また、車両用灯具１０は、一方側導光反射面（３３Ａ、３６Ａ）と他方側導光反射面（３３Ｂ、３６Ｂ）とが、導光出射面（３１、３４）へ向けて反射した一方側光源（１４Ａ、１５Ａ）から出射された光と、導光出射面へ向けて反射した他方側光源（１４Ｂ、１５Ｂ）から出射された光と、を、レンズ出射面（２４、２７）から互いに平行として出射させる。このため、車両用灯具１０は、湾曲されたレンズ出射面であっても、導光方向の一部に光が集まることを抑制できるので、導光方向で略等しく光らせることができる。 Further, in the vehicle lighting equipment 10, one side of the light guide reflecting surface (33A, 36A) and the other side of the light guide reflecting surface (33B, 36B) are reflected toward the light guide emitting surface (31, 34). The light emitted from the light source (14A, 15A) and the light emitted from the other side light source (14B, 15B) reflected toward the light guide emitting surface are parallel to each other from the lens emitting surface (24, 27). Is emitted as. For this reason, the vehicle lamp 10 can suppress the light from gathering in a part of the light guide direction even if the lens emitting surface is curved, so that the light can be illuminated substantially equally in the light guide direction.

さらに、車両用灯具１０は、一方側導光反射面（３３Ａ、３６Ａ）と他方側導光反射面（３３Ｂ、３６Ｂ）とが、導光方向においてレンズ出射面（２４、２７）における湾曲頂点１１ｂと一致する位置に境界が設定されている。ここで、レンズ出射面では、導光方向で湾曲頂点１１ｂと一致する位置を境に、出射される光が屈折する向きが反対側に変化する。このため、車両用灯具１０は、一方側導光反射面と他方側導光反射面とを、それぞれが対応するレンズ出射面の傾斜に合わせて逆転させた光学的な設定とすればよいので、簡易な構成としつつレンズ出射面から互いに平行な光を出射させることができる。 Further, in the vehicle lamp 10, the one-side light guide reflection surface (33A, 36A) and the other side light guide reflection surface (33B, 36B) have curved apex 11b at the lens exit surface (24, 27) in the light guide direction. The boundary is set at the position that matches with. Here, on the lens emitting surface, the direction in which the emitted light is refracted changes to the opposite side with the position corresponding to the curved apex 11b in the light guide direction as a boundary. For this reason, the vehicle lighting fixture 10 may have an optical setting in which the one-side light guide reflection surface and the other side light guide reflection surface are reversed according to the inclination of the corresponding lens exit surface. Light parallel to each other can be emitted from the lens emitting surface while having a simple configuration.

車両用灯具１０は、レンズ出射面（２４、２７）が、導光方向に交差する上下方向（交差方向）で並列された複数の出射箇所４３を有する。このため、車両用灯具１０は、インナーレンズ１１のレンズ出射面において、上下方向で並列する各出射箇所４３を全長に亘って略等しい明るさで光らせることができ、意匠性に優れたランプとして機能できる。 The vehicle lamp 10 has a plurality of emission points 43 in which the lens emission surfaces (24, 27) are arranged in the vertical direction (intersection direction) intersecting the light guide direction. Therefore, the vehicle lamp 10 can illuminate each of the emission points 43 arranged in parallel in the vertical direction with substantially the same brightness over the entire length on the lens emission surface of the inner lens 11, and functions as a lamp having excellent design. it can.

車両用灯具１０は、インナーレンズ１１が、交差方向で並べられた第１レンズ部２１と第２レンズ部２２とを有し、第１レンズ部２１または第２レンズ部２２では互いの繋ぎ目（レンズ稜線１１ａ）といずれか１つの出射箇所４３（実施例１では第２出射箇所４３ｂ）とを交差方向において少なくとも一部を重複させている。このため、車両用灯具１０は、繋ぎ目の周辺領域Ａｐが光った場合であっても、重ねられた出射箇所４３が光っているものとして認識させることができ、出射箇所４３として設定した本数以上の箇所が線状に光ることを防止できる。 The vehicle lighting fixture 10 has an inner lens 11 having a first lens portion 21 and a second lens portion 22 arranged in an intersecting direction, and the first lens portion 21 or the second lens portion 22 has a joint (joint with each other). The lens ridge line 11a) and any one of the emission points 43 (the second emission point 43b in the first embodiment) overlap at least a part in the crossing direction. Therefore, even when the peripheral region Ap of the joint is shining, the vehicle lighting fixture 10 can be recognized as shining the overlapped emission points 43, and the number of the overlapping emission points 43 is equal to or larger than the number set as the emission points 43. It is possible to prevent the part from shining linearly.

したがって、本開示に係る車両用灯具としての実施例１の車両用灯具１０は、湾曲されたレンズ出射面（２４、２７）を導光方向で略等しく光らせることができる。 Therefore, the vehicle lamp 10 of the first embodiment as the vehicle lamp according to the present disclosure can illuminate the curved lens emitting surfaces (24, 27) substantially equally in the light guide direction.

以上、本開示の車両用灯具を実施例１に基づき説明してきたが、具体的な構成については実施例１に限られるものではなく、特許請求の範囲の各請求項に係る発明の要旨を逸脱しない限り、設計の変更や追加等は許容される。 Although the vehicle lamps of the present disclosure have been described based on the first embodiment, the specific configuration is not limited to the first embodiment and deviates from the gist of the invention according to each claim of the claims. Unless otherwise, design changes and additions are allowed.

なお、実施例１では、各光源（１３、１４）が赤色の光を出射するものとしている。しかしながら、各光源（１３、１４）は、それぞれが対応する出射箇所４３の用途に応じて色を適宜設定すればよく、また第１光源１４と第２光源１５とで異なる色を出射してもよく、実施例１の構成に限定されない。例えば、各光源（１３、１４）がアンバー色の光を出射することでターンランプとの機能を持たせることができ、各光源（１３、１４）が白色の光を出射するものとすることでクリアランスランプの機能を持たせることができる。加えて、第１光源１４と第２光源１５とで異なる色を出射するものとすることで、例えばテールランプやターンランプやクリアランスランプのうちの２つの機能を併せ持たせることや、それらとは異なる意匠性を有するランプとして機能させることができる。 In Example 1, each light source (13, 14) emits red light. However, the colors of the respective light sources (13, 14) may be appropriately set according to the intended use of the corresponding emission points 43, and even if the first light source 14 and the second light source 15 emit different colors. Well, it is not limited to the configuration of the first embodiment. For example, each light source (13, 14) can have a function as a turn lamp by emitting amber-colored light, and each light source (13, 14) emits white light. It can have the function of a clearance lamp. In addition, by emitting different colors from the first light source 14 and the second light source 15, for example, two functions of a tail lamp, a turn lamp, and a clearance lamp can be combined, or different from them. It can function as a lamp with design.

また、実施例１では、両導光体（１２、１３）における導光方向の両方の端部を導光入射面（３２、３５）として各光源（１３、１４）を設けている。しかしながら、導光入射面は、各導光体（１２、１３）におけるどちらかの端部にだけ設け、そこに対応させて光源（１３、１４）を設けるものとしてもよく、実施例１の構成に限定されない。この場合には、各導光体において導光入射面（光源）を設けていない側の端部を反射面とすることで、当該端部から光が漏れ出すことを抑制でき、各導光体に入射された光を効率よく利用できる。 Further, in the first embodiment, each light source (13, 14) is provided with both ends of both light guide bodies (12, 13) in the light guide direction as light guide incident surfaces (32, 35). However, the light guide incident surface may be provided only at either end of each light guide body (12, 13), and the light source (13, 14) may be provided corresponding to the end, and the configuration of the first embodiment. Not limited to. In this case, by using the end portion of each light guide body on the side where the light guide incident surface (light source) is not provided as the reflection surface, it is possible to suppress the leakage of light from the end portion, and each light guide body. The light incident on the can be efficiently used.

さらに、実施例１では、５本の出射箇所４３（４３ａから４３ｅ）を並べて設けている。しかしながら、出射箇所４３は、レンズ入射面（２３、２６）において各導光体（１２、１３）に導かれた光を出射させる箇所であれば、その本数や間隔や形状は適宜設定すればよく、実施例１の構成に限定されない。 Further, in the first embodiment, five emission points 43 (43a to 43e) are provided side by side. However, as long as the light emitting points 43 emit light guided to each light guide body (12, 13) on the lens incident surface (23, 26), the number, spacing, and shape may be appropriately set. , The configuration is not limited to the first embodiment.

実施例１では、インナーレンズ１１が第１レンズ部２１および第２レンズ部２２を有するものとしている。しかしながら、インナーレンズ１１は、導光体（１２、１３）で導かれた光を、レンズ入射面（２３、２６）で入射させてレンズ出射面（２４、２７）から出射させるものであれば、第１レンズ部２１と第２レンズ部２２とのどちらか一方のみを有するものとしてもよく、他の形状としてもよく、実施例１の構成に限定されない。 In the first embodiment, it is assumed that the inner lens 11 has the first lens portion 21 and the second lens portion 22. However, if the inner lens 11 is such that the light guided by the light guide body (12, 13) is incident on the lens incident surface (23, 26) and emitted from the lens emitting surface (24, 27). It may have only one of the first lens portion 21 and the second lens portion 22, or may have another shape, and is not limited to the configuration of the first embodiment.

実施例１では、各出射箇所４３が、インナーレンズ１１のレンズ出射面（２４、２７）において、各第１レンズ反射面２５や各第２レンズ反射面２８で反射された光が出射されることで形成されている。しかしながら、各出射箇所４３は、インナーレンズ１１のレンズ出射面（２４、２７）において、レンズ入射面（２３、２６）から入射された導光体（１２、１３）からの光を出射させる箇所であればよく、実施例１の構成に限定されない。 In the first embodiment, each emission point 43 emits light reflected by each first lens reflection surface 25 and each second lens reflection surface 28 on the lens emission surfaces (24, 27) of the inner lens 11. Is formed of. However, each emission point 43 is a position on the lens emission surface (24, 27) of the inner lens 11 where light is emitted from the light guide body (12, 13) incident from the lens incident surface (23, 26). It suffices, and is not limited to the configuration of the first embodiment.

実施例１では、インナーレンズ１１の第１レンズ部２１の第１レンズ出射面２４の第２出射箇所４３ｂの少なくとも一部を周辺領域Ａｐに重複させている。しかしながら、インナーレンズ１１のレンズ出射面に設けたいずれか１つの各出射箇所４３の少なくとも一部を、上下方向において繋ぎ目の周辺領域Ａｐに重複させるものであれば、第２レンズ部２２の出射箇所４３（実施例１では第３出射箇所４３ｃ）を重複させてもよく、他の構成でもよく、実施例１の構成に限定されない。 In the first embodiment, at least a part of the second emission portion 43b of the first lens emission surface 24 of the first lens portion 21 of the inner lens 11 is overlapped with the peripheral region Ap. However, if at least a part of each of the emission points 43 provided on the lens emission surface of the inner lens 11 is overlapped with the peripheral region Ap of the joint in the vertical direction, the emission of the second lens portion 22 is performed. Locations 43 (third exit location 43c in Example 1) may be overlapped, or other configurations may be used, and the configuration is not limited to that of Example 1.

１０ 車両用灯具 １１ インナーレンズ １１ｂ 湾曲頂点 １２ 第１導光体 １３ 第２導光体（導光体） １４ 第１光源（光源） １５ 第２光源（光源） ２１ 第１レンズ部 ２２ 第２レンズ部 ２３ 第１レンズ入射面（レンズ入射面） ２４ 第１レンズ出射面（レンズ出射面） ２６ 第２レンズ入射面（レンズ入射面） ２７ 第２レンズ出射面（レンズ出射面） ３１ 第１導光出射面（導光出射面） ３２ 第１導光入射面（導光入射面） ３３ 第１導光反射面（導光反射面） ３４ 第２導光出射面（導光出射面） ３５ 第２導光入射面（導光入射面） ３６ 第２導光反射面（導光反射面） ３２Ａ、３５Ａ 一方側導光入射面 ３２Ｂ、３５Ｂ 他方側導光入射面 ３３Ａ、３６Ａ 一方側導光反射面 ３３Ｂ、３６Ｂ 他方側導光反射面 ４３ 出射箇所 10 Vehicle lighting 11 Inner lens 11b Curved apex 12 1st light guide 13 2nd light guide (light guide) 14 1st light source (light source) 15 2nd light source (light source) 21 1st lens part 22 2nd lens Part 23 1st lens incident surface (lens incident surface) 24 1st lens exit surface (lens exit surface) 26 2nd lens incident surface (lens incident surface) 27 2nd lens exit surface (lens exit surface) 31 1st light guide Emission surface (light guide emission surface) 32 First light guide injection surface (light guide injection surface) 33 First light guide reflection surface (light guide reflection surface) 34 Second light guide emission surface (light guide emission surface) 35 Second Light guide incident surface (light guide incident surface) 36 Second light guide reflection surface (light guide reflection surface) 32A, 35A One side light guide incident surface 32B, 35B The other side light guide incident surface 33A, 36A One side light guide reflection surface 33B, 36B Opposite light guide reflection surface 43 Exit location

Claims (5)

レンズ入射面とレンズ出射面とを有するインナーレンズと、
導光方向に延びて設けられ、前記導光方向の端部の導光入射面と、前記レンズ入射面に対向する導光出射面と、前記導光出射面から出射される向きとは反対側の導光反射面と、を有する導光体と、
前記導光入射面に対向して設けられた光源と、を備え、
前記レンズ出射面は、前記導光方向に対して湾曲され、
前記導光入射面は、前記導光体の前記導光方向の一方の端部に設けられた一方側導光入射面と、前記導光体の前記導光方向の他方の端部に設けられた他方側導光入射面と、を有し、
前記光源は、前記一方側導光入射面に対応する一方側光源と、前記他方側導光入射面に対応する他方側光源と、を有し、
前記導光反射面は、前記一方側導光入射面側に位置する一方側導光反射面と、前記他方側導光入射面側に位置する他方側導光反射面と、を有し、
前記一方側導光反射面は、前記他方側光源から出射されて前記他方側導光入射面から入射した光を前記導光出射面へ向けて反射し、
前記他方側導光反射面は、前記一方側光源から出射されて前記一方側導光入射面から入射した光を前記導光出射面へ向けて反射することを特徴とする車両用灯具。 An inner lens having a lens entrance surface and a lens exit surface,
The light guide incident surface at the end of the light guide direction, the light guide exit surface facing the lens incident surface, and the side opposite to the direction emitted from the light guide exit surface, which are provided so as to extend in the light guide direction. A light guide with a light guide reflecting surface, and a light guide
A light source provided so as to face the light guide incident surface is provided.
The lens exit surface is curved with respect to the light guide direction.
The light guide incident surface is provided on one end of the light guide body in the light guide direction and on the other end of the light guide body in the light guide direction. On the other side, it has a light guide incident surface and
The light source includes a one-sided light source corresponding to the one-sided light guide incident surface and the other side light source corresponding to the other side light guide incident surface.
The light guide reflecting surface has a one side light guide reflecting surface located on the one side light guide incident surface side and the other side light guide reflecting surface located on the other side light guide incident surface side.
The one-sided light guide reflecting surface reflects light emitted from the other side light source and incident from the other side light guide incident surface toward the light guide emitting surface.
The other-side light guide reflecting surface is a vehicle lighting tool characterized in that light emitted from the one-side light source and incident from the one-side light guide incident surface is reflected toward the light guide emitting surface. 前記一方側導光反射面と前記他方側導光反射面とは、前記導光出射面へ向けて反射した前記一方側光源から出射された光と、前記導光出射面へ向けて反射した前記他方側光源から出射された光と、を、前記レンズ出射面から互いに平行として出射させることを特徴とする請求項１に記載の車両用灯具。 The one-sided light guide reflecting surface and the other side light guide reflecting surface are the light emitted from the one side light source reflected toward the light guide emitting surface and the light reflected toward the light guide emitting surface. The vehicle lighting tool according to claim 1, wherein the light emitted from the other side light source is emitted from the lens emitting surface in parallel with each other. 前記一方側導光反射面と前記他方側導光反射面とは、前記導光方向において前記レンズ出射面における湾曲頂点と一致する位置に境界が設定されていることを特徴とする請求項１または請求項２に記載の車両用灯具。 Claim 1 or claim 1, wherein the one-side light guide reflection surface and the other side light guide reflection surface are bounded at a position corresponding to a curved apex on the lens exit surface in the light guide direction. The vehicle lighting fixture according to claim 2. 前記レンズ出射面は、前記導光方向に交差する交差方向で並列された複数の出射箇所を有することを特徴とする請求項１から請求項３までのいずれか１項に記載の車両用灯具。 The vehicle lamp according to any one of claims 1 to 3, wherein the lens emitting surface has a plurality of emitting points arranged in parallel in an intersecting direction intersecting the light guide direction. 前記インナーレンズは、前記交差方向で並べられた第１レンズ部と第２レンズ部とを有し、
前記第１レンズ部または前記第２レンズ部では、互いの繋ぎ目の周辺領域といずれか１つの前記出射箇所とが、前記交差方向において少なくとも一部を重複させていることを特徴とする請求項４に記載の車両用灯具。 The inner lens has a first lens portion and a second lens portion arranged in the crossing direction.
A claim that the first lens unit or the second lens unit has at least a part of a peripheral region of a joint and one of the emission points overlapping in the crossing direction. The vehicle lighting equipment according to 4.
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016110845A (en) * 2014-12-05 2016-06-20 市光工業株式会社 Vehicle lighting appliance
JP2017033836A (en) * 2015-08-04 2017-02-09 株式会社小糸製作所 Vehicular lighting fixture

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016110845A (en) * 2014-12-05 2016-06-20 市光工業株式会社 Vehicle lighting appliance
JP2017033836A (en) * 2015-08-04 2017-02-09 株式会社小糸製作所 Vehicular lighting fixture

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