JP7034750B2 - Vehicle lighting - Google Patents

Vehicle lighting Download PDF

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JP7034750B2
JP7034750B2 JP2018021499A JP2018021499A JP7034750B2 JP 7034750 B2 JP7034750 B2 JP 7034750B2 JP 2018021499 A JP2018021499 A JP 2018021499A JP 2018021499 A JP2018021499 A JP 2018021499A JP 7034750 B2 JP7034750 B2 JP 7034750B2
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light guide
light
guide rod
flat plate
plate
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JP2019139934A (en
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陽介 小池
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Stanley Electric Co Ltd
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Stanley Electric Co Ltd
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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
    • 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
    • F21S43/242—Light guides characterised by the emission area
    • F21S43/245—Light guides characterised by the emission area emitting light from one or more of its major surfaces
    • 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
    • F21S43/247—Light guides with a single light source being coupled into the light guide
    • 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
    • F21W2107/00—Use or application of lighting devices on or in particular types of vehicles
    • F21W2107/10—Use or application of lighting devices on or in particular types of vehicles for land vehicles

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Description

本発明は、光源からの光によって発光する導光体を備える車両用灯具に関するものである。 The present invention relates to a vehicle lamp provided with a light guide body that emits light by light from a light source.

例えば、テールランプやポジションランプ等の車両用灯具には、ＬＥＤ（発光ダイオード）等の光源から入射する光を長手方向に導く過程で反射させて出射面から出射させることによって発光する導光体を備えるものがあり、斯かる車両用灯具の導光体の反出射面には反射用のレンズカットが長手方向に沿って連続的に形成されている。 For example, vehicle lamps such as tail lamps and position lamps are provided with a light guide body that emits light by reflecting light incident from a light source such as an LED (light emitting diode) in the process of guiding it in the longitudinal direction and emitting it from an exit surface. In some cases, a lens cut for reflection is continuously formed along the longitudinal direction on the repellent surface of the light guide body of such a vehicle lamp.

ところで、導光体を備える車両用灯具に関して、例えば、特許文献１には図８に示すものが提案されている。 By the way, with respect to a vehicle lamp provided with a light guide, for example, the one shown in FIG. 8 is proposed in Patent Document 1.

即ち、図８は特許文献１において提案された車両用灯具を備えるフロントコンビネーションランプの正面図であって、このフロントコンビネーションランプ１０１にはクリアランスランプ１１０が設けられている。このクリアランスランプ１１０においては、分岐部を有する棒状の第１導光体１１２Ａと第２導光体１１２Ｂとの間に、これらの第１導光体１１２Ａと第２導光体１１２Ｂとに接続される平板状導光板（ライトカーテン）１１２Ｃが設けられており、第１導光体１１２Ａと第２導光体１１２Ｂの分岐部と平板状導光板１１２Ｃとの間に透孔等の光分岐手段１１３が設けられている。 That is, FIG. 8 is a front view of the front combination lamp provided with the vehicle lighting fixture proposed in Patent Document 1, and the front combination lamp 101 is provided with a clearance lamp 110. In the clearance lamp 110, the rod-shaped first light guide body 112A and the second light guide body 112B having a branch portion are connected to the first light guide body 112A and the second light guide body 112B. A flat plate-shaped light guide plate (light curtain) 112C is provided, and an optical branching means 113 such as a through hole is provided between the branch portion of the first light guide body 112A and the second light guide body 112B and the flat plate-shaped light guide plate 112C. Is provided.

上記クリアランスランプ１１０によれば、光源であるＬＥＤ１１１から第１導光体１１２Ａに入射する光と第２導光体１１２Ｂに入射する光を効率良く分岐させることができるとともに、平板状導光板１１２Ｃを設けることによって発光面積を拡大して当該クリアランスランプ１１０の被視認性を高めることができる。 According to the clearance lamp 110, the light incident on the first light guide body 112A and the light incident on the second light guide body 112B can be efficiently branched from the light source LED 111, and the flat plate-shaped light guide plate 112C can be provided. By providing the clearance lamp 110, the light emitting area can be expanded and the visibility of the clearance lamp 110 can be improved.

又、特許文献２には、図９に示すような導光体を備える車両用灯具が提案されている。 Further, Patent Document 2 proposes a lamp for a vehicle provided with a light guide as shown in FIG.

即ち、図９は特許文献２において提案された車両用灯具に設けられた導光体の正面図であり、図示の導光体２１２は、光源であるＬＥＤ２１１からの光によって発光するものである。この導光体２１２は、互いに分岐して下方に向かって延びる棒状の第１導光部２１２Ａと第２導光部２１２Ｂ及びこれらの第１導光部２１２Ａと第２導光部２１２Ｂとの間に形成された板状導光部（ライトカーテン）２１２Ｃによって構成されている。そして、板状導光部２１２Ｃの端部側面２１２ａは、上側に凹んだ半円状に成形されている。 That is, FIG. 9 is a front view of the light guide body provided in the vehicle lamp proposed in Patent Document 2, and the light guide body 212 shown in the figure emits light by light from LED 211 which is a light source. The light guide body 212 is located between the rod-shaped first light guide unit 212A and the second light guide unit 212B that branch off from each other and extend downward, and between the first light guide unit 212A and the second light guide unit 212B. It is composed of a plate-shaped light guide portion (light curtain) 212C formed in the above. The end side surface 212a of the plate-shaped light guide portion 212C is formed in a semicircular shape recessed upward.

上記導光体２１２において、ＬＥＤ２１１から出射する光は、該導光体２１２の入射面から第１導光部２１２Ａと第２導光部２１２Ｂにそれぞれ分かれて入射し、全反射を繰り返しながら第１導光部２１２Ａと第２導光部２１２Ｂの内部を下方に向かって進み、その過程で、第１導光部２１２Ａと第２導光部２１２Ｂの各裏面に形成された不図示のステップによって反射して正面側（図９の手前側）に出射するため、第１導光部２１２Ａと第２導光部２１２Ｂがそれぞれ発光する。 In the light guide body 212, the light emitted from the LED 211 is separately incident on the first light guide unit 212A and the second light guide unit 212B from the incident surface of the light guide body 212, and is first while repeating total reflection. It travels downward inside the light guide section 212A and the second light guide section 212B, and in the process, is reflected by steps (not shown) formed on the back surfaces of the first light guide section 212A and the second light guide section 212B. Then, the light is emitted to the front side (front side in FIG. 9), so that the first light guide unit 212A and the second light guide unit 212B emit light, respectively.

又、第１導光部２１２Ａと第２導光部２１２Ｂの各内部を進む光の一部は、板状導光部２１２Ｃへと入射し、全反射を繰り返しながら進む過程で、該板状導光部２１２Ｃの裏面に形成された不図示のステップによって反射して正面側に出射するため、板状導光部２１２Ｃが発光する。ここで、板状導光部２１２Ｃの内部を進む光の一部は、該板状導光部２１２Ｃの端部側面２１２ａに到達し、この端部側面２１２ａに中央部分に入射する光Ｌ３は、端部側面２１２ａから外部に向かって出射する。そして、端部側面２１２ａの中央部分から外れた位置に入射する光Ｌ４，Ｌ５は、端部側面２１２ａで全反射して第１導光部２１２Ａと第２導光部２１２Ｂへと向かうため、端部側面２１２ａから出射する光が少なくなり、端部側面２１２ａの発光強度が抑制されて板状導光部２１２Ｃが均一に発光することとなる。 Further, a part of the light traveling inside each of the first light guide unit 212A and the second light guide unit 212B is incident on the plate-shaped light guide unit 212C, and the plate-shaped guide is carried out in the process of repeating total reflection. The plate-shaped light guide portion 212C emits light because it is reflected by a step (not shown) formed on the back surface of the light portion 212C and emitted to the front side. Here, a part of the light traveling inside the plate-shaped light guide portion 212C reaches the end side surface 212a of the plate-shaped light guide portion 212C, and the light L3 incident on the end side surface 212a at the center portion is the light L3. It emits outward from the end side surface 212a. Then, the light L4 and L5 incident on the position deviated from the central portion of the end side surface 212a is totally reflected by the end side surface 212a and heads toward the first light guide portion 212A and the second light guide portion 212B, so that the end The amount of light emitted from the side surface 212a of the portion is reduced, the light emission intensity of the side surface 212a of the end portion is suppressed, and the plate-shaped light guide portion 212C emits light uniformly.

特開２０１４－００７０１４号公報Japanese Unexamined Patent Publication No. 2014-007014 特開２０１７－１４７１０２号公報Japanese Unexamined Patent Publication No. 2017-147102

しかしながら、特許文献１において提案された図８に示すクリアランスランプ１１０においては、平板状導光板１１２Ｃを発光させるために２本の第１導光体１１２Ａと第２導光体１１２Ｂを用いているため、構造が複雑化するという問題がある。又、第１導光体１１２Ａと第２導光体１１２Ｂの内部を進む光は、第１導光体１１２Ａと第２導光体１１２Ｂの末端部（図８の下端部）に向かって強度が次第に弱くなるために、これらの第１導光体１１２Ａと第２導光体１１２Ｂは、末端部に向かって次第に暗くなる。そして、これに伴って平板状導光板１１２Ｃも末端部（図８の下端部）に向かって次第に暗くなり、該平板状導光板１１２Ｃを均一に発光させることができないという問題がある。このような問題は、特許文献２において提案された図９に示す導光体２１２を備える車両用灯具についても同様である。 However, in the clearance lamp 110 shown in FIG. 8 proposed in Patent Document 1, two first light guides 112A and a second light guide 112B are used to make the flat plate-shaped light guide plate 112C emit light. , There is a problem that the structure becomes complicated. Further, the light traveling inside the first light guide body 112A and the second light guide body 112B has an intensity toward the end portions (lower end portion in FIG. 8) of the first light guide body 112A and the second light guide body 112B. Since these first light guides 112A and second light guides 112B are gradually weakened, they are gradually darkened toward the end portions. Along with this, the flat plate-shaped light guide plate 112C also gradually becomes darker toward the end portion (lower end portion in FIG. 8), and there is a problem that the flat plate-shaped light guide plate 112C cannot emit light uniformly. Such a problem is the same for the vehicle lighting equipment provided with the light guide body 212 shown in FIG. 9 proposed in Patent Document 2.

本発明は上記問題に鑑みてなされたもので、その目的とする処は、１本の導光棒の内部を進む光によってライトカーテンの全体を均一に発光させることができる車両用灯具を提供することにある。 The present invention has been made in view of the above problems, and an object of the present invention is to provide a vehicle lamp capable of uniformly emitting light as a whole of a light curtain by light traveling inside one light guide rod. There is something in it.

上記目的を達成するため、請求項１記載の発明は、ハウジングとその開口部を覆うアウタレンズによって画成された灯室内に、光源と、導光棒と該導光棒の一側面から一体に延びる平板状の平板状導光板を備える導光体を収容し、前記光源から前記導光棒内に入射する光を該導光棒の長手方向に導く過程で、前記導光棒の反出射面に形成されたレンズカットによって光を反射させて出射面から出射させるとともに、前記導光棒の一側面から前記平板状導光板へと入射する光を該平板状導光板の反出射面に形成されたレンズカットによって反射させて出射面から出射させることによって前記各レンズカットをそれぞれ発光させる車両用灯具において、前記平板状導光板の外端縁の少なくとも一部に、該平板状導光板内を進む光の一部を反射させて当該平板状導光板内に戻すプリズムカットを形成し、前記プリズムカットによって反射する光が前記導光棒の入射面とは反対側の端部領域に向かうように前記プリズムカットの角度を設定したことを特徴とする。 In order to achieve the above object, the invention according to claim 1 extends integrally from a light source, a light guide rod, and one side surface of the light guide rod into a lamp chamber defined by an outer lens covering the housing and its opening. In the process of accommodating a light guide body provided with a flat plate-shaped light guide plate and guiding light incident on the light guide rod from the light source in the longitudinal direction of the light guide rod, the light emitting surface of the light guide rod Light is reflected by the formed lens cut to be emitted from the emission surface, and light incident on the flat plate-shaped light guide plate from one side surface of the light guide rod is formed on the anti-emission surface of the flat plate-shaped light guide plate . In a vehicle lighting device that emits light from each lens cut by being reflected by a lens cut and emitted from an emission surface, light traveling in the flat light guide plate is applied to at least a part of the outer edge of the flat light guide plate . A prism cut is formed to reflect a part of the light and return it to the inside of the flat plate-shaped light guide plate , and the light reflected by the prism cut is directed to the end region opposite to the incident surface of the light guide rod. It is characterized by setting the cut angle .

請求項２記載の発明は、請求項１記載の発明において、前記光源を前記導光棒の長手方向一端の入射面に対向して配置するとともに、前記プリズムカットの角度を、前記導光棒の前記入射面とは反対側の端部に向かうに従って徐々に小さくなるように設定したことを特徴とする。 The invention according to claim 2 is the invention according to claim 1 , wherein the light source is arranged so as to face the incident surface at one end in the longitudinal direction of the light guide rod, and the angle of the prism cut is set to the light guide rod. It is characterized in that it is set so as to gradually decrease toward the end opposite to the incident surface.

請求項３記載の発明は、請求項１または請求項２に記載の発明において、前記平板状導光板の反出射面に、前記レンズカットを互いに平行な複数の直線上に形成したことを特徴とする。 The invention according to claim 3 is characterized in that, in the invention according to claim 1 or 2, the lens cut is formed on a plurality of straight lines parallel to each other on the recurrent surface of the flat plate-shaped light guide plate . do.

請求項１記載の発明によれば、１本の導光棒から平板状導光板に入射して全反射を繰り返しながら該平板状導光板内を進む光の一部が当該平板状導光板の外端縁に達すると、この光は、平板状導光板の外端縁に形成されたプリズムカットによって該平板状導光板内に戻されて当該平板状導光板の発光に供せられるため、１本の導光棒の内部を進む光によって平板状導光板の全体を均一に発光させることができる。また、平板状導光板の暗くなる部分を明るく発光させることができる。 According to the invention according to claim 1, a part of the light traveling in the flat plate-shaped light guide plate while being incident on the flat plate-shaped light guide plate from one light guide rod and repeating total reflection is outside the flat plate-shaped light guide plate . When it reaches the edge, this light is returned to the inside of the flat light guide plate by the prism cut formed on the outer edge of the flat light guide plate and is used for light emission of the flat light guide plate. The entire flat plate-shaped light guide plate can be made to emit light uniformly by the light traveling inside the light guide rod. In addition, the darkened portion of the flat plate-shaped light guide plate can be made to emit bright light.

請求項２記載の発明によれば、光源を導光棒の長手方向一端の入射面に対向して配置するとともに、平板状導光板の外端縁の少なくとも一部に形成されたプリズムカットの角度を、該プリズムカットによって反射する光が導光棒の入射面とは反対側の端部（暗くなる部分）に向かうように設定（例えば、導光棒の入射面とは反対側の端部に向かうに従って徐々に小さくなるように設定）したため、この光によって平板状導光板の暗くなる部分を明るく発光させることができる。 According to the invention according to claim 2 , the light source is arranged so as to face the incident surface at one end in the longitudinal direction of the light guide rod, and the angle of the prism cut formed on at least a part of the outer end edge of the flat plate-shaped light guide plate . Is set so that the light reflected by the prism cut is directed toward the end (darkened portion) opposite to the incident surface of the light guide rod (for example, at the end opposite to the incident surface of the light guide rod). Since it is set so that it gradually becomes smaller as it goes toward it), it is possible to make the darkened part of the flat plate-shaped light guide plate emit bright light by this light.

請求項３記載の発明によれば、導光体の平板状導光板を平行な複数の直線が縞状に発光するものとすることができる。 According to the third aspect of the present invention, the flat plate-shaped light guide plate of the light guide can be made to emit light in a striped manner by a plurality of parallel straight lines.

本発明に係る車両用灯具を備えるフロントコンビネーションランプの正面図である。It is a front view of the front combination lamp provided with the lighting equipment for a vehicle which concerns on this invention. 図１のＡ－Ａ線断面図である。FIG. 3 is a cross-sectional view taken along the line AA of FIG. 本発明に係る車両用灯具の導光体の正面図である。It is a front view of the light guide body of the light fixture for a vehicle which concerns on this invention. 図３のＢ－Ｂ線断面図である。FIG. 3 is a cross-sectional view taken along the line BB of FIG. 図２のＣ部拡大詳細図である。It is an enlarged detailed view of part C of FIG. 図３のＤ部拡大詳細図である。It is an enlarged detailed view of part D of FIG. 図３のＥ部拡大詳細図である。It is an enlarged detailed view of part E of FIG. 特許文献１において提案された車両用灯具に設けられた導光体の正面図である。It is a front view of the light guide body provided in the light fixture for a vehicle proposed in Patent Document 1. FIG. 特許文献２において提案された車両用灯具を備えるリアコンビネーションランプの正面図である。It is a front view of the rear combination lamp provided with the vehicle lighting fixture proposed in Patent Document 2.

以下に本発明の実施の形態を添付図面に基づいて説明する。 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

図１は本発明に係る車両用灯具を備えるフロントコンビネーションランプの正面図、図２は図１のＡ－Ａ線断面図、図３は導光体の正面図、図４は図３のＢ－Ｂ線断面図、図５は図２のＣ部拡大詳細図、図６は図３のＤ部拡大詳細図、図７は図３のＥ部拡大詳細図であり、図１に示すフロントコンビネーションランプ１は、自動二輪車の前部左右に配置されるものであって、その基本構成は左右で同じであるため、以下、一方のフロントコンビネーションランプ１についてのみ図示及び説明する。 1 is a front view of a front combination lamp provided with a vehicle lamp according to the present invention, FIG. 2 is a sectional view taken along line AA of FIG. 1, FIG. 3 is a front view of a light guide body, and FIG. 4 is B- of FIG. A cross-sectional view taken along line B, FIG. 5 is an enlarged detailed view of part C in FIG. 2, FIG. 6 is an enlarged detailed view of part D in FIG. 3, and FIG. 7 is an enlarged detailed view of part E in FIG. Reference numeral 1 is arranged on the left and right sides of the front portion of the motorcycle, and the basic configuration thereof is the same on the left and right sides. Therefore, only one of the front combination lamps 1 will be illustrated and described below.

図１及び図２に示すフロントコンビネーションランプ１は、ハウジング２とその前面開口部を覆う透明なアウタレンズ３によって画成された灯室４内の上部にターンシグナルランプ５を収容し、このターンシグナルランプ５の下方に本発明に係るポジションランプ１０を収容して構成されている。尚、図２に示すように、灯室４内には、ターンシグナルランプ５とポジションランプ１０の周囲の隙間を覆うためのエクステンション６が配置されている。 The front combination lamp 1 shown in FIGS. 1 and 2 accommodates a turn signal lamp 5 in an upper portion in a lighting chamber 4 defined by a transparent outer lens 3 covering a housing 2 and a front opening thereof, and the turn signal lamp. The position lamp 10 according to the present invention is housed under the position 5. As shown in FIG. 2, an extension 6 for covering the gap around the turn signal lamp 5 and the position lamp 10 is arranged in the light chamber 4.

上記ハウジング２は、光不透過性の樹脂によって一体成形されており、その外周縁の全周に亘って形成された凹溝２ａに、光透過性の透明な樹脂によって一体成形されたアウタレンズ３の外周縁の脚部３ａを嵌め込み、その嵌め込み部分をホットメルト等の不図示の接着剤によって接着することによって、アウタレンズ３の外周縁がハウジング２の開口部周縁に結着されて両者の間に前記灯室４が画成されている。 The housing 2 is integrally molded with a light-transmitting resin, and the outer lens 3 is integrally molded with a light-transmitting transparent resin in a concave groove 2a formed over the entire outer peripheral edge thereof. By fitting the leg portion 3a on the outer peripheral edge and adhering the fitted portion with an adhesive (not shown) such as hot melt, the outer peripheral edge of the outer lens 3 is bound to the peripheral edge of the opening of the housing 2 and described above. The light room 4 is defined.

ところで、本発明に係る前記ポジションランプ１０は、図３に示すように、光源であるＬＥＤ１１と、該ＬＥＤ１１から出射する光によって発光する平面視多角形状の導光体１２を備えている。この導光体１２は、導光性の高いアクリルやポリカーボネイト等の透明樹脂によって一体成形されており、正面視Ｌ字状に屈曲する導光棒１２Ａと、該導光棒１２Ａの一側面から横方向に一体に延びる平板状のライトカーテン１２Ｂとで構成されている。尚、ライトカーテン１２Ｂの厚さは、導光棒１２Ａの厚さよりも薄く設定されている（図４参照）。 By the way, as shown in FIG. 3, the position lamp 10 according to the present invention includes an LED 11 as a light source and a light guide body 12 having a polygonal shape in a plan view and emitted by light emitted from the LED 11. The light guide body 12 is integrally molded with a transparent resin such as acrylic or polycarbonate having high light guide properties, and has a light guide rod 12A that bends in an L shape when viewed from the front and a side surface of the light guide rod 12A. It is composed of a flat plate-shaped light curtain 12B extending integrally in the direction. The thickness of the light curtain 12B is set to be thinner than the thickness of the light guide rod 12A (see FIG. 4).

図３に示すように、導光体１２を構成する導光棒１２Ａの上端部に形成された半球面状の入射面１２ａに対向して前記ＬＥＤ１１が設置されている。又、図４に示すように、導光棒１２Ａの正面側の半球面状の面は、出射面１２ｂを構成しており、この出射面１２ｂとは反対側の裏面には、矩形凹溝状の凹部１２ｃが長手方向（図４の紙面垂直方向）に沿って形成されている。そして、この凹部１２ｃの出射面１２ｂに対向する平坦面には、複数のレンズカット１３が長手方向に沿って連続的に形成されている。 As shown in FIG. 3, the LED 11 is installed facing the hemispherical incident surface 12a formed at the upper end of the light guide rod 12A constituting the light guide body 12. Further, as shown in FIG. 4, the hemispherical surface on the front side of the light guide rod 12A constitutes the emission surface 12b, and the back surface on the opposite side to the emission surface 12b has a rectangular concave groove shape. The recess 12c of the above is formed along the longitudinal direction (the direction perpendicular to the paper surface of FIG. 4). A plurality of lens cuts 13 are continuously formed along the longitudinal direction on the flat surface of the recess 12c facing the exit surface 12b.

又、図４に示すように、ライトカーテン１２Ｂの正面側の面（図４の上面）は平坦な出射面１２ｄを構成しており、この出射面１２ｄとは反対側の裏面（図４の下面）には、図３に示すように、レンズカット１４が互いに平行な複数の直線上に形成されている。即ち、ライトカーテン１２Ｂの裏面には、レンズカット１４が形成された複数の直線が互いに平行に並設されている。ここで、各レンズカット１４は、図５及び図６に示すように、複数の四角錐を直線状に連続的に並設することによって形成されている。 Further, as shown in FIG. 4, the front surface (upper surface of FIG. 4) of the light curtain 12B constitutes a flat emission surface 12d, and the back surface (lower surface of FIG. 4) opposite to the emission surface 12d. ), As shown in FIG. 3, the lens cuts 14 are formed on a plurality of straight lines parallel to each other. That is, on the back surface of the light curtain 12B, a plurality of straight lines on which the lens cut 14 is formed are arranged side by side in parallel with each other. Here, as shown in FIGS. 5 and 6, each lens cut 14 is formed by continuously arranging a plurality of quadrangular pyramids in a straight line.

そして、本実施の形態においては、ライトカーテン１２Ｂの外周端縁の一部（上端縁を除く側端縁）には、図７に示す複数のプリズムカット１５が連続的に形成されている。ここで、プリズムカット１５は、後述のようにライトカーテン１２Ｂ内を進む光の一部を反射させて当該ライトカーテン１２Ｂ内に戻すためのものであって、そのピッチＰは、２ｍｍ以下に設定されており、水平に対して成す角度θは、光Ｌを反射させたい方向に対して垂直となる値に設定されており、本実施の形態では、ライトカーテン１２Ｂの形状からして導光棒１２Ａの先端（上端）から末端（下端）に向かって（図７の斜め下方に向かって）角度θが徐々に小さくなるように設定されている。即ち、プリズムカット１５の角度θは、該プリズムカット１５によって反射する光が導光棒１２Ａの入射面１２ａとは反対側の端部領域（暗くなる領域）に向かうよう設定されている。 In the present embodiment, a plurality of prism cuts 15 shown in FIG. 7 are continuously formed on a part of the outer peripheral edge of the light curtain 12B (side edge excluding the upper edge). Here, the prism cut 15 is for reflecting a part of the light traveling in the light curtain 12B and returning it to the inside of the light curtain 12B as described later, and its pitch P is set to 2 mm or less. The angle θ formed with respect to the horizontal is set to a value perpendicular to the direction in which the light L is desired to be reflected. In the present embodiment, the light guide rod 12A is set in view of the shape of the light curtain 12B. The angle θ is set to gradually decrease from the tip (upper end) to the end (lower end) (diagonally downward in FIG. 7). That is, the angle θ of the prism cut 15 is set so that the light reflected by the prism cut 15 is directed to the end region (darkening region) on the opposite side of the incident surface 12a of the light guide rod 12A.

以上のように構成されたポジションランプ１０において、バッテリ等の不図示の電源からＬＥＤ１１に電流が供給されて該ＬＥＤ１１が発光すると、その光は、導光体１２の導光棒１２Ａの上端の入射面１２ａから該導光棒１２Ａの内部へと入射する。そして、導光棒１２Ａの内部へと入射した光は、全反射を繰り返しながら該導光棒１２Ａの内部を上端側から下端側に向かって進む過程で、導光棒１２Ａの裏面（反出射面）の凹部１２ｃに形成されたレンズカット１３（図４参照）によって反射し、出射面１２ｂから車両前方（図２の左方）に向かって出射する。そして、導光棒１２Ａの出射面１２ｂから出射した光は、図２に示す透明なアウタレンズ３を通過して車両前方へと照射される。このため、ポジションランプ１０において、導光体１２の導光棒１２Ａ（レンズカット１３）が発光する。 In the position lamp 10 configured as described above, when a current is supplied to the LED 11 from a power source (not shown) such as a battery and the LED 11 emits light, the light is incident on the upper end of the light guide rod 12A of the light guide body 12. It is incident on the inside of the light guide rod 12A from the surface 12a. Then, the light incident on the inside of the light guide rod 12A travels through the inside of the light guide rod 12A from the upper end side to the lower end side while repeating total reflection, and the back surface (reverse emission surface) of the light guide rod 12A. ) Is reflected by the lens cut 13 (see FIG. 4) formed in the recess 12c, and is emitted from the exit surface 12b toward the front of the vehicle (to the left in FIG. 2). Then, the light emitted from the emission surface 12b of the light guide rod 12A passes through the transparent outer lens 3 shown in FIG. 2 and is irradiated to the front of the vehicle. Therefore, in the position lamp 10, the light guide rod 12A (lens cut 13) of the light guide body 12 emits light.

又、導光棒１２Ａの内部を長手方向に進む光の一部は、図３に示すように、導光棒１２Ａの側部から漏れてライトカーテン１２Ｂの内部へと入射し、該ライトカーテン１２Ｂの内部を全反射を繰り返しながら外端縁に向かって進む過程で、ライトカーテン１２Ｂの反出射面（裏面）に直線状に形成された複数の平行な直線を成すレンズカット１４で反射して出射面１２ｄから車両前方に向かって出射するため、ライトカーテン１２Ｂにおいては、平行な複数の直線が縞状に発光することとなる。 Further, as shown in FIG. 3, a part of the light traveling in the longitudinal direction inside the light guide rod 12A leaks from the side portion of the light guide rod 12A and enters the inside of the light curtain 12B, and the light curtain 12B In the process of advancing toward the outer edge while repeating total internal reflection, the light curtain 12B is reflected and emitted by the lens cut 14 forming a plurality of parallel straight lines formed linearly on the recurrent surface (back surface) of the light curtain 12B. Since the light is emitted from the surface 12d toward the front of the vehicle, a plurality of parallel straight lines emit light in a striped manner in the light curtain 12B.

更に、ライトカーテン１２Ｂの内部を側端縁に向かって進む光は、図７に示すプリズムカット１５によって反射して当該ライトカーテン１２Ｂの内部へと戻されるため、この戻される光によって複数の直線状を成すレンズカット１４が発光する。ここで、本実施の形態では、前述のようにプリズムカット１５の角度θを、該プリズムカット１５によって反射する光が導光棒１２Ａの入射面１２ａとは反対側の端部（暗くなる部分）に向かうよう設定したため、この光によってライトカーテン１２Ｂの暗くなる部分が明るく発光する。このため、１つのＬＥＤ１１と導光棒１２Ａによってライトカーテン１２Ｂの全体を均一に発光させることができる。ここで、図７に示すプリズムカット１５のピッチＰを小さく設定することによって、光を反射させる方向を細かく制御することができ、ライトカーテン１２Ｂの様々な意匠形状に対応することが可能となる。 Further, the light traveling inside the light curtain 12B toward the side edge is reflected by the prism cut 15 shown in FIG. 7 and returned to the inside of the light curtain 12B, so that the returned light causes a plurality of linear shapes. The lens cut 14 forming the light is emitted. Here, in the present embodiment, as described above, the angle θ of the prism cut 15 is the end portion (darkened portion) on the opposite side of the light reflected by the prism cut 15 from the incident surface 12a of the light guide rod 12A. Since the setting is made toward, the darkened portion of the light curtain 12B emits bright light due to this light. Therefore, the entire light curtain 12B can be made to emit light uniformly by one LED 11 and the light guide rod 12A. Here, by setting the pitch P of the prism cut 15 shown in FIG. 7 to be small, the direction in which light is reflected can be finely controlled, and it becomes possible to correspond to various design shapes of the light curtain 12B.

尚、以上は本発明を自動二輪車の前部左右に配置されるフロントコンビネーションランプに設けられたポジションランプに対して適用した形態について説明したが、本発明は、自動車を含む他の車両に設けられるヘッドランプ、リアコンビネーションランプ、ハイマウントストップランプ、ＤＲＬ（Day Running Lamp）等の他の任意の車両用灯具に対しても同様に適用可能であることは勿論である。 Although the present invention has been described above with respect to the position lamps provided on the front combination lamps arranged on the front left and right sides of the motorcycle, the present invention is provided on other vehicles including automobiles. Of course, it can be similarly applied to any other vehicle lighting equipment such as a head lamp, a rear combination lamp, a high mount stop lamp, and a DRL (Day Running Lamp).

１ フロントコンビネーションランプ
２ ハウジング
３ アウタレンズ
４ 灯室
５ ターンシグナルランプ
６ エクステンション
１０ ポジションランプ（車両用灯具）
１１ ＬＥＤ（光源）
１２ 導光体
１２Ａ 導光棒
１２Ｂ ライトカーテン
１２ａ 導光棒の入射面
１２ｂ 導光棒の出射面
１２ｃ 導光棒の凹部
１２ｄ ライトカーテンの出射面
１３，１４ レンズカット
１５ プリズムカット
Ｌ 光
Ｐ プリズムカットのピッチ
θ プリズムカットの角度
1 Front combination lamp 2 Housing 3 Outer lens 4 Light room 5 Turn signal lamp 6 Extension 10 Position lamp (vehicle lighting equipment)
11 LED (light source)
12 Light guide 12A Light guide rod 12B Light curtain 12a Incident surface of light guide rod 12b Exit surface of light guide rod 12c Recessed surface of light guide rod 12d Exit surface of light curtain 13, 14 Lens cut 15 Prism cut L Light P Prism cut Pitch θ Prism cut angle

Claims (3)

ハウジングとその開口部を覆うアウタレンズによって画成された灯室内に、光源と、導光棒と該導光棒の一側面から一体に延びる平板状の平板状導光板を備える導光体を収容し、
前記光源から前記導光棒内に入射する光を該導光棒の長手方向に導く過程で、前記導光棒の反出射面に形成されたレンズカットによって光を反射させて出射面から出射させるとともに、前記導光棒の一側面から前記平板状導光板へと入射する光を該平板状導光板の反出射面に形成されたレンズカットによって反射させて出射面から出射させることによって前記各レンズカットをそれぞれ発光させる車両用灯具において、
前記平板状導光板の外端縁の少なくとも一部に、該平板状導光板内を進む光の一部を反射させて当該平板状導光板内に戻すプリズムカットを形成し、
前記プリズムカットによって反射する光が前記導光棒の入射面とは反対側の端部領域に向かうように前記プリズムカットの角度を設定したことを特徴とする車両用灯具。 A light source and a light guide body having a light guide rod and a flat plate-shaped light guide plate extending integrally from one side surface of the light guide rod are housed in a light chamber defined by an outer lens covering the housing and its opening. ,
In the process of guiding the light incident on the light guide rod from the light source in the longitudinal direction of the light guide rod, the light is reflected by the lens cut formed on the anti-emission surface of the light guide rod and emitted from the emission surface. At the same time, the light incident on the flat plate-shaped light guide plate from one side surface of the light guide rod is reflected by the lens cut formed on the anti-emission surface of the flat plate-shaped light guide plate and emitted from the emission surface. In vehicle lighting equipment that emits light from each cut
A prism cut is formed on at least a part of the outer edge of the flat plate-shaped light guide plate to reflect a part of the light traveling in the flat plate-shaped light guide plate and return it to the inside of the flat plate-shaped light guide plate.
A vehicle lighting fixture characterized in that the angle of the prism cut is set so that the light reflected by the prism cut is directed to the end region on the side opposite to the incident surface of the light guide rod . 前記光源を前記導光棒の長手方向一端の入射面に対向して配置するとともに、前記プリズムカットの角度を、前記導光棒の前記入射面とは反対側の端部に向かうに従って徐々に小さくなるように設定したことを特徴とする請求項１に記載の車両用灯具。 The light source is arranged so as to face the incident surface at one end in the longitudinal direction of the light guide rod, and the angle of the prism cut is gradually reduced toward the end portion of the light guide rod opposite to the incident surface. The vehicle lighting fixture according to claim 1, wherein the lamp is set so as to be. 前記平板状導光板の反出射面に、前記レンズカットを互いに平行な複数の直線上に形成した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。 The vehicle lamp according to claim 1 or 2 , wherein the lens cut is formed on a plurality of straight lines parallel to each other on the repulsive surface of the flat plate-shaped light guide plate .
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