JP6205744B2 - Vehicle light guide member, vehicle lamp - Google Patents

Vehicle light guide member, vehicle lamp Download PDF

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JP6205744B2
JP6205744B2 JP2013029327A JP2013029327A JP6205744B2 JP 6205744 B2 JP6205744 B2 JP 6205744B2 JP 2013029327 A JP2013029327 A JP 2013029327A JP 2013029327 A JP2013029327 A JP 2013029327A JP 6205744 B2 JP6205744 B2 JP 6205744B2
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light guide
lamp
light
guide member
exit
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JP2014157787A (en
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絵里 神近
絵里 神近
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Ichikoh Industries Ltd
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Ichikoh Industries 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
    • F21S43/235—Light guides
    • F21S43/251—Light guides the light guides being used to transmit light from remote light sources
    • 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
    • F21S43/242—Light guides characterised by the emission area
    • F21S43/243—Light guides characterised by the emission area emitting light from one or more of its extremities
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • 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

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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)

Description

この発明は、光の損失（導光損失）が小さい車両用導光部材に関するものである。また、この発明は、光の損失（導光損失）が小さい車両用導光部材を使用する車両用灯具に関するものである。   The present invention relates to a light guide member for a vehicle with a small light loss (light guide loss). The present invention also relates to a vehicular lamp that uses a vehicular light guide member with a small light loss (light guide loss).

車両用導光部材、車両用導光部材を使用する車両用灯具（以下、単に「車両用灯具」と称する）は、従来からある（たとえば、特許文献１）。従来の車両用灯具は、光源と、導光体と、レンズと、を備え、導光体が本体部と複数の突出部とを含むものである。光源からの光は、導光体の本体部中に入射して複数の突出部から出射して、レンズを透過して外部に照射する。   Conventionally, a vehicle light guide member and a vehicle lamp using the vehicle light guide member (hereinafter simply referred to as “vehicle lamp”) are known (for example, Patent Document 1). A conventional vehicular lamp includes a light source, a light guide, and a lens, and the light guide includes a main body portion and a plurality of protrusions. Light from the light source enters the light guide body, exits from the plurality of protrusions, passes through the lens, and radiates outside.

特開２００８−１０３２７３号公報JP 2008-103273 A

この種の車両用灯具においては、導光体中に導かれる光が損失するのをできる限り小さくすることが重要である。ところが、従来の車両用灯具は、光の損失を小さくする手段が設けられていない。   In this type of vehicle lamp, it is important to minimize the loss of light guided into the light guide. However, conventional vehicular lamps are not provided with means for reducing light loss.

この発明が解決しようとする課題は、従来の車両用灯具では、光の損失を小さくする手段が設けられていない、という点にある。   The problem to be solved by the present invention is that a conventional vehicle lamp is not provided with means for reducing the loss of light.

この発明（請求項１にかかる発明）は、光を入射させる１個の入射面と、光を出射させる複数個の出射面と、入射面と出射面との間の導光部と、を備え、導光部は、１個の入射面から複数個の出射面に徐々に変形させる徐変部分と、徐変部分により徐々に変形した複数個の出射面から１個の出射面を徐々に分岐させる第一分岐部分、及び第二分岐部分と、を有し、入射面は、円形をなし、出射面は、入射面よりも小径の円形をなし、複数個の出射面は、径が異なる円形をなし、徐変部分は、１個の入射面の円形から、複数個の出射面の円形を重ねた形状に、徐々に変形させる部分であり、第１分岐部分は、１個の出射面の円形を、残りの複数個の出射面の円形を重ねた形状から徐々に分岐させる部分であり、第２分岐部分は、第１分岐部分よりも、入射面から離れた位置に設けられ、１個の出射面の円形を、残りの１個の出射面の円形から、徐々に分岐させる部分である、ことを特徴とする。 The present invention (the invention according to claim 1) includes a single incident surface on which light is incident, a plurality of emission surfaces from which light is emitted, and a light guide portion between the incident surface and the emission surface. The light guide unit gradually changes one exit surface from a gradually changing portion that gradually deforms from one incident surface to a plurality of exit surfaces, and a plurality of exit surfaces that are gradually deformed by the gradually changing portion. let the first branch portion, and a second branch portion, have a incident surface, a circular exit surface is a circular of diameter smaller than the incident surface, a plurality of the exit surface is circular having a diameter different The gradually changing portion is a portion that is gradually deformed from a circular shape of one incident surface to a shape in which the circular shapes of a plurality of outgoing surfaces are overlapped, and the first branch portion is a portion of one outgoing surface. The circular shape is a portion that gradually branches from the shape in which the circular shapes of the remaining plurality of exit surfaces are overlapped, and the second branched portion is the first branched portion. Also, provided in a position away from the incident surface, a circular one exit surface, a circular remaining one of the exit surface is a portion which gradually branches, characterized in that.

この発明（請求項２にかかる発明）は、灯室を区画するランプハウジングおよびランプレンズと、灯室内に配置されている光源およびリフレクタおよび請求項１に記載の車両用導光部材と、を備える、ことを特徴とする。 The present invention (the invention according to claim 2) includes a lamp housing and a lamp lens defining the lamp chamber, and the vehicle light-guiding member according to the light source and the reflector and請 Motomeko 1 are arranged in the lamp chamber , Comprising.

この発明の車両用導光部材、車両用灯具は、導光部の徐変部分と分岐部分とにより、入射面から入射した光を、できる限り損失が小さくなるように、複数個の出射面に分配することができる。   The vehicle light guide member and the vehicle lamp according to the present invention are arranged on a plurality of exit surfaces so that light incident from the entrance surface is reduced as much as possible by the gradually changing portion and the branching portion of the light guide portion. Can be distributed.

図１は、この発明にかかる車両用導光部材、車両用灯具の実施形態を示す断面図である。FIG. 1 is a sectional view showing an embodiment of a vehicle light guide member and a vehicle lamp according to the present invention. 図２は、車両用導光部材とリフレクタとを示す正面図（図１におけるＩＩ矢視図）である。FIG. 2 is a front view (viewed in the direction of arrow II in FIG. 1) showing the vehicle light guide member and the reflector. 図３は、車両用導光部材を示す正面図である。FIG. 3 is a front view showing the vehicle light guide member. 図４は、車両用導光部材を示す側面図（図３におけるＩＶ矢視図）である。FIG. 4 is a side view showing the vehicle light guide member (as viewed in the direction of arrow IV in FIG. 3). 図５は、図３におけるＶ矢視図である。FIG. 5 is a view taken in the direction of arrow V in FIG. 図６は、図３におけるＶＩ−ＶＩ線断面図である。6 is a cross-sectional view taken along line VI-VI in FIG. 図７は、図３におけるＶＩＩ−ＶＩＩ線断面図である。7 is a cross-sectional view taken along line VII-VII in FIG. 図８は、図３におけるＶＩＩＩ−ＶＩＩＩ線断面図である。8 is a cross-sectional view taken along line VIII-VIII in FIG. 図９は、図３におけるＩＸ−ＩＸ線断面図である。9 is a cross-sectional view taken along line IX-IX in FIG. 図１０は、図３におけるＸ−Ｘ線断面図である。10 is a cross-sectional view taken along line XX in FIG. 図１１は、この発明にかかる車両用導光部材の変形例を示す断面図（図８に対応する断面図）である。FIG. 11 is a cross-sectional view (a cross-sectional view corresponding to FIG. 8) showing a modification of the vehicle light guide member according to the present invention.

以下、この発明にかかる車両用導光部材の実施形態（実施例）の１例およびこの発明にかかる車両用灯具の実施形態（実施例）の１例を、図面に基づいて詳細に説明する。なお、この実施形態によりこの発明が限定されるものではない。なお、図６〜図１１において、車両用導光部材のハッチングを省略する。   Hereinafter, an example of an embodiment (example) of a light guide member for a vehicle according to the present invention and an example of an embodiment (example) of a vehicle lamp according to the present invention will be described in detail based on the drawings. In addition, this invention is not limited by this embodiment. In addition, in FIGS. 6-11, hatching of the light guide member for vehicles is abbreviate | omitted.

（実施形態の構成の説明）
以下、この実施形態における車両用導光部材の構成およびこの実施形態における車両用灯具の構成について説明する。この例は、たとえば、自動車用のリヤコンビネーションランプのテール・ストップランプについて説明する。 (Description of Configuration of Embodiment)
Hereinafter, the configuration of the vehicle light guide member in this embodiment and the configuration of the vehicle lamp in this embodiment will be described. In this example, for example, a tail stop lamp of a rear combination lamp for an automobile will be described.

（車両用灯具１の説明）
図１において、符号１は、この実施形態における車両用灯具である。前記車両用灯具１は、車両の後部の左右両側に搭載されている。以下、前記車両用灯具１について説明する。 (Description of vehicle lamp 1)
In FIG. 1, the code | symbol 1 is a vehicle lamp in this embodiment. The vehicular lamp 1 is mounted on both the left and right sides of the rear portion of the vehicle. Hereinafter, the vehicle lamp 1 will be described.

前記車両用灯具１は、図１に示すように、平面視（車両の上から見て）正面（車両の後部）から側面（車両の側部）にかけて回り込んだ形状をなす。前記車両用灯具１は、ランプハウジング２と、ランプレンズ３と、１個の光源４と、１個の導光部材（車両用導光部材）５と、複数個この例では３個のリフレクタ６１、６２、６３と、を備える。   As shown in FIG. 1, the vehicular lamp 1 has a shape that wraps around from the front (rear part of the vehicle) to the side surface (side of the vehicle) in plan view (viewed from above the vehicle). The vehicular lamp 1 includes a lamp housing 2, a lamp lens 3, one light source 4, one light guide member (vehicle light guide member) 5, and a plurality of reflectors 61 in this example. , 62, 63.

前記ランプハウジング２および前記ランプレンズ（たとえば、素通しのアウターレンズなど）３は、全周縁において、シール材でシールされていて、灯室７を水密に画成する。前記光源４および前記導光部材５および前記リフレクタ６１、６２、６３は、前記灯室７内に配置されている。   The lamp housing 2 and the lamp lens (for example, a transparent outer lens, etc.) 3 are sealed with a sealing material at the entire periphery, thereby defining the lamp chamber 7 in a watertight manner. The light source 4, the light guide member 5, and the reflectors 61, 62, 63 are disposed in the lamp chamber 7.

なお、前記灯室７内に図示しないインナーパネル（インナーハウジング）を配置して、前記光源４を覆い隠しても良い。また、前記灯室７内には、この実施形態のテール・ストップランプ以外の機能のランプ、たとえば、ターンシグナルランプ、バックアップランプ、などが配置されている場合がある。   An inner panel (inner housing) (not shown) may be disposed in the lamp chamber 7 to cover and hide the light source 4. In the lamp chamber 7, lamps having functions other than the tail / stop lamp of this embodiment, for example, a turn signal lamp, a backup lamp, and the like may be arranged.

前記光源４および前記導光部材５および前記リフレクタ６１、６２、６３は、ブラケットなどの適宜手段により、前記ランプハウジング２に取り付けられている。前記光源４は、半導体型光源あるいはバルブ光源から構成されている。前記光源４は、光を前記導光部材５側に放射する（図１中の実線矢印を参照）。前記リフレクタ６１、６２、６３は、前記導光部材５から出射した光を前記ランプレンズ３側に反射させる（図１中の実線矢印を参照）。   The light source 4, the light guide member 5, and the reflectors 61, 62, 63 are attached to the lamp housing 2 by appropriate means such as a bracket. The light source 4 is composed of a semiconductor light source or a bulb light source. The light source 4 emits light to the light guide member 5 side (see solid line arrow in FIG. 1). The reflectors 61, 62, and 63 reflect the light emitted from the light guide member 5 toward the lamp lens 3 (see solid line arrows in FIG. 1).

（導光部材５の説明）
前記導光部材５は、前記光源４からの光を前記リフレクタ６１、６２、６３側に導く。前記導光部材５は、この例では、ＰＣ（ポリカーボネート）、ＰＭＭＡ（ポリメタクリル酸メチル、メタクリル樹脂）などの透明樹脂材から構成されている。 (Description of the light guide member 5)
The light guide member 5 guides the light from the light source 4 to the reflectors 61, 62, 63 side. In this example, the light guide member 5 is made of a transparent resin material such as PC (polycarbonate) or PMMA (polymethyl methacrylate, methacrylic resin).

前記導光部材５は、光を入射させる１個の入射面５０と、光を出射させる複数個この例では３個の出射面５１、５２、５３と、前記入射面５０と前記出射面５１、５２、５３との間の導光部５４と、を備える。前記入射面５０は、図５中の実線および図６、図７中の二点鎖線にて示すように、円形をなす。前記出射面５１、５２、５３は、図２、図３、図６〜図１０中の実線および破線にて示すように、前記入射面５０よりも小径の円形をなす。前記入射面５０および前記出射面５１、５２、５３は、この例では、平面をなす。   The light guide member 5 includes one incident surface 50 on which light is incident, a plurality of light exit surfaces 51, 52, and 53 in this example that emit light, and the incident surface 50 and the exit surface 51, And a light guide 54 between 52 and 53. The incident surface 50 has a circular shape as indicated by a solid line in FIG. 5 and a two-dot chain line in FIGS. The exit surfaces 51, 52, 53 have a circular shape with a smaller diameter than the entrance surface 50, as indicated by solid lines and broken lines in FIGS. 2, 3, and 6 to 10. The entrance surface 50 and the exit surfaces 51, 52, 53 form a flat surface in this example.

前記導光部５４は、図３に示すように、始端部分５４０と、徐変部分５４１と、第１中間部分５４２と、第１分岐部分５４３と、第２中間部分５４４と、第２分岐部分５４５と、終端部分５４６と、から構成されている。前記始端部分５４０は、前記入射面５０の円形が続く部分である。   As shown in FIG. 3, the light guide 54 includes a start end portion 540, a gradually changing portion 541, a first intermediate portion 542, a first branch portion 543, a second intermediate portion 544, and a second branch portion. 545 and an end portion 546. The start end portion 540 is a portion where the circular shape of the incident surface 50 continues.

前記徐変部分５４１は、１個の前記入射面５０の円形（図５参照）から３個の前記出射面５１、５２、５３の円形５１０、５２０、５３０を重ねた形状（図６，図７参照）に徐々に変形させる部分である。前記第１中間部分５４２は、３個の前記出射面５１、５２、５３の円形５１０、５２０、５３０を重ねた形状が続く部分である。   The gradually changing portion 541 is formed by superposing three circles 510, 520, and 530 of the exit surfaces 51, 52, and 53 from a circle of the one entrance surface 50 (see FIG. 5) (FIGS. 6 and 7). This is the part that is gradually deformed. The first intermediate portion 542 is a portion in which three circular shapes 510, 520, and 530 of the emission surfaces 51, 52, and 53 continue.

前記第１分岐部分５４３は、１個の前記出射面５１の円形５１０を、残りの２個の前記出射面５２、５３の円形５２０、５３０を重ねた形状から、徐々に分岐させる部分である。分岐された部分は、前記出射面５１が前記リフレクタ６１に対向するように、湾曲されている。前記第２中間部分５４４は、残り２個の前記出射面５２、５３の円形５２０、５３０を重ねた形状が続く部分である。   The first branch portion 543 is a portion that gradually branches the circle 510 of the one exit surface 51 from a shape in which the circles 520 and 530 of the remaining two exit surfaces 52 and 53 are overlapped. The branched portion is curved so that the emission surface 51 faces the reflector 61. The second intermediate portion 544 is a portion in which the remaining two exit surfaces 52 and 53 are continuously overlapped with the circular shapes 520 and 530.

前記第２分岐部分５４５は、１個の前記出射面５２の円形５２０を、残りの１個の前記出射面５３の円形５３０から、徐々に分岐させる部分である。分岐された部分は、前記出射面５２が前記リフレクタ６２に対向するように、湾曲されている。前記終端部分５４６は、残りの１個の前記出射面５３の円形５３０が続く部分である。前記終端部分５４６は、前記出射面５３が前記リフレクタ６３に対向するように、湾曲されている。   The second branch portion 545 is a portion that gradually divides the circular shape 520 of one outgoing surface 52 from the circular shape 530 of the remaining outgoing surface 53. The branched portion is curved so that the emission surface 52 faces the reflector 62. The terminal portion 546 is a portion where the circular 530 of the remaining one exit surface 53 continues. The end portion 546 is curved so that the emission surface 53 faces the reflector 63.

（実施形態の作用の説明）
この実施形態における車両用導光部材（導光部材５）およびこの実施形態における車両用灯具１は、以上のごとき構成からなり、以下、その作用について説明する。 (Description of the operation of the embodiment)
The vehicle light guide member (light guide member 5) in this embodiment and the vehicle lamp 1 in this embodiment are configured as described above, and the operation thereof will be described below.

光源４を点灯する。すると、光源４から放射された光は、図１中の実線矢印に示すように、導光部材５の入射面５０から導光部材５の導光部５４中に入射する。導光部５４中に入射した光（図示せず）は、導光部５４中を３個の出射面５１、５２、５３側に導かれる。３個の出射面５１、５２、５３に導かれた光は、図１中の実線矢印に示すように、導光部材５の３個の出射面５１、５２、５３から３個のリフレクタ６１、６２、６３に向かってそれぞれ出射する。３個の出射面５１、５２、５３からそれぞれ出射した光は、３個のリフレクタ６１、６２、６３でランプレンズ３側に反射される。反射した光は、ランプレンズ３を透過して外部に所定のテール・ストップランプの配光パターンで照射される。   The light source 4 is turned on. Then, the light emitted from the light source 4 enters the light guide portion 54 of the light guide member 5 from the incident surface 50 of the light guide member 5 as indicated by solid line arrows in FIG. Light (not shown) incident on the light guide 54 is guided to the three exit surfaces 51, 52, and 53 through the light guide 54. The light guided to the three exit surfaces 51, 52, 53 is reflected from the three exit surfaces 51, 52, 53 of the light guide member 5 into three reflectors 61, The light is emitted toward 62 and 63, respectively. Light emitted from the three exit surfaces 51, 52, and 53 is reflected by the three reflectors 61, 62, and 63 to the lamp lens 3 side. The reflected light passes through the lamp lens 3 and is irradiated to the outside with a predetermined light distribution pattern of the tail / stop lamp.

ここで、さらに詳細に説明する。導光部５４中に入射した光は、まず、始端部分５４０、徐変部分５４１、第１中間部分５４２を経て第１分岐部分５４３に達する。第１分岐部分５４３に達した光は、この第１分岐部分５４３において、１個の出射面５１側の光と残りの２個の出射面５２、５３側の光とに分岐される。１個の出射面５１側の光は、残りの２個の出射面５２、５３側の光から分岐されて出射面５１からリフレクタ６１に向けて出射する。   Here, it demonstrates in detail. The light that has entered the light guide portion 54 first reaches the first branch portion 543 through the start end portion 540, the gradually changing portion 541, and the first intermediate portion 542. The light that has reached the first branching portion 543 is branched into light on the one exit surface 51 side and light on the other two exit surfaces 52 and 53 side in the first branch portion 543. The light on the one exit surface 51 side is branched from the light on the remaining two exit surfaces 52 and 53 and exits from the exit surface 51 toward the reflector 61.

残りの２個の出射面５２、５３側の光は、第１分岐部分５４３、第２中間部分５４４を経て第２分岐部分５４５に達する。第２分岐部分５４５に達した光は、この第２分岐部分５４５において、１個の出射面５２側の光と残りの１個の出射面５３側の光とに分岐される。１個の出射面５２側の光は、残りの１個の出射面５３側の光から分岐されて出射面５２からリフレクタ６２に向けて出射する。   The remaining light on the two exit surfaces 52 and 53 side reaches the second branch portion 545 through the first branch portion 543 and the second intermediate portion 544. The light that has reached the second branch portion 545 is split into light on the one exit surface 52 side and light on the other exit surface 53 side in the second branch portion 545. The light on the one exit surface 52 side is branched from the remaining light on the one exit surface 53 side and exits from the exit surface 52 toward the reflector 62.

残りの１個の出射面５３側の光は、第２分岐部分５４５を経て終端部分５４６に達する。終端部分５４６に達した光は、出射面５３からリフレクタ６３に向けて出射する。   The remaining light on the exit surface 53 side passes through the second branch portion 545 and reaches the end portion 546. The light that reaches the end portion 546 is emitted from the emission surface 53 toward the reflector 63.

（実施形態の効果の説明）
この実施形態における車両用導光部材（導光部材５）およびこの実施形態における車両用灯具１は、以上のごとき構成および作用からなり、以下、その効果について説明する。 (Explanation of effect of embodiment)
The vehicle light guide member (light guide member 5) in this embodiment and the vehicle lamp 1 in this embodiment are configured and operated as described above, and the effects thereof will be described below.

この実施形態における車両用導光部材（導光部材５）およびこの実施形態における車両用灯具１は、導光部５４の徐変部分５４１と第１分岐部分５４３と第２分岐部分５４５とにより、入射面５０から入射した光を、できる限り損失が小さくなるように、３個の出射面５１、５２、５３に分配することができる。   The vehicle light guide member (light guide member 5) in this embodiment and the vehicle lamp 1 in this embodiment include a gradually changing portion 541, a first branch portion 543, and a second branch portion 545 of the light guide portion 54. Light incident from the incident surface 50 can be distributed to the three exit surfaces 51, 52, and 53 so that the loss is as small as possible.

この実施形態における車両用導光部材（導光部材５）およびこの実施形態における車両用灯具１は、入射面５０が、円形をなし、３個の出射面５１、５２、５３が、入射面５０よりも小径の円形をなし、徐変部分５４１が、１個の入射面５０の円形から、３個の出射面５１、５２、５３の円形５１０、５２０、５３０を重ねた形状に、徐々に変形させる部分であり、第１分岐部分５４３が、１個の出射面５１の円形５１０を、残りの２個の出射面５２、５３の円形５２０、５３０を重ねた形状から、徐々に分岐させる部分であり、第２分岐部分５４５が、１個の出射面５２の円形５２０を、残りの１個の出射面５３の円形５３０から、徐々に分岐させる部分である。この結果、この実施形態における車両用導光部材（導光部材５）およびこの実施形態における車両用灯具１は、光の損失をさらに小さくすることができる。   In the vehicle light guide member (light guide member 5) in this embodiment and the vehicle lamp 1 in this embodiment, the entrance surface 50 is circular, and the three exit surfaces 51, 52, 53 are the entrance surface 50. The gradually changing portion 541 is gradually deformed from a circular shape of one incident surface 50 into a shape in which the circular shapes 510, 520, and 530 of three outgoing surfaces 51, 52, and 53 are overlapped. The first branching portion 543 is a portion that gradually branches the circle 510 of the one exit surface 51 from the shape of overlapping the circles 520 and 530 of the remaining two exit surfaces 52 and 53. In addition, the second branch portion 545 is a portion that gradually branches the circle 520 of one exit surface 52 from the circle 530 of the remaining one exit surface 53. As a result, the vehicle light guide member (light guide member 5) in this embodiment and the vehicle lamp 1 in this embodiment can further reduce light loss.

（変形例の説明）
図１１は、この発明にかかる車両用導光部材の変形例を示す断面図（図８に対応する断面図）である。この変形例における車両用導光部材（導光部材５Ａ）は、３個の出射面（５１、５２、５３）の円形５１０Ａ、５２０Ａ、５３０Ａの径が、大、中、小、とそれぞれ異なるものである。この結果、この変形例における車両用導光部材（導光部材５Ａ）は、３個の出射面（５１、５２、５３）から出射される光の強弱（光量の大小）を出射面ごとに調節することができる。すなわち、出射面の円形の径を大とすると、出射面積が大となって、光量が大となる。一方、出射面の円形の径を小とすると、出射面積が小となって、光量が小となる。 (Description of modification)
FIG. 11 is a cross-sectional view (a cross-sectional view corresponding to FIG. 8) showing a modification of the light guide member for a vehicle according to the present invention. The vehicle light guide member (light guide member 5A) in this modified example is different in that the diameters of the circles 510A, 520A, and 530A of the three exit surfaces (51, 52, 53) are large, medium, and small, respectively. It is. As a result, the vehicle light guide member (light guide member 5A) in this modification adjusts the intensity (the amount of light) of the light emitted from the three emission surfaces (51, 52, 53) for each emission surface. can do. That is, if the circular diameter of the emission surface is increased, the emission area is increased and the amount of light is increased. On the other hand, when the circular diameter of the emission surface is small, the emission area is small and the light quantity is small.

（実施形態以外の例の説明）
なお、この実施形態においては、車両用灯具１として、テール・ストップランプに使用するものである。ところが、この発明においては、車両用灯具としてテール・ストップランプ以外のランプ、たとえば、ターンシグナルランプ、クリアランスランプ、テールランプ、ストップランプ、デイタイムランニングランプ、オーバーヘッドサインランプ、フォグランプ、ヘッドランプなどのランプにも使用することができる。 (Description of example other than embodiment)
In this embodiment, the vehicular lamp 1 is used for a tail / stop lamp. However, in the present invention, a lamp other than the tail / stop lamp as a vehicle lamp, such as a turn signal lamp, a clearance lamp, a tail lamp, a stop lamp, a daytime running lamp, an overhead sign lamp, a fog lamp, a head lamp, etc. Can also be used.

また、この実施形態においては、導光部材５の出射面５１、５２、５３が３個である。ところが、この発明においては、導光部材の出射面は、２個、４個以上であっても良い。出射面が２個の場合は、分岐部分が１個となり、出射面が４個以上の場合は、分岐部分が３個以上となる。   In this embodiment, the light guide member 5 has three exit surfaces 51, 52, and 53. However, in this invention, the output surface of the light guide member may be two, four or more. When there are two exit surfaces, the number of branch portions is one, and when there are four or more exit surfaces, there are three or more branch portions.

さらに、この実施形態においては、導光部材５に始端部分５４０、第１中間部分５４２、第２中間部分５４４を設けるものである。ところが、この発明においては、導光部材に始端部分、第１中間部分、第２中間部分を設けなくても良い。   Furthermore, in this embodiment, the light guide member 5 is provided with a start end portion 540, a first intermediate portion 542, and a second intermediate portion 544. However, in the present invention, the light guide member may not be provided with the start end portion, the first intermediate portion, and the second intermediate portion.

さらにまた、この実施形態においては、入射面５０および出射面５１、５２、５３が円形をなすものである。ところが、この発明においては、入射面および出射面が円形以外の形状のものであっても良い。   Furthermore, in this embodiment, the entrance surface 50 and the exit surfaces 51, 52, 53 are circular. However, in the present invention, the entrance surface and the exit surface may be other than circular.

１ 車両用灯具
２ ランプハウジング
３ ランプレンズ
４ 光源
５ 導光部材
５０ 入射面
５１、５２、５３ 出射面
５１０、５２０、５３０ 出射面の円形
５４ 導光部
５４０ 始端部分
５４１ 徐変部分
５４２ 第１中間部分
５４３ 第１分岐部分
５４４ 第２中間部分
５４５ 第２分岐部分
５４６ 終端部分
６１、６２、６３ リフレクタ
７ 灯室 DESCRIPTION OF SYMBOLS 1 Vehicle lamp 2 Lamp housing 3 Lamp lens 4 Light source 5 Light guide member 50 Incidence surface 51,52,53 Outgoing surface 510,520,530 Circularity of outgoing surface 54 Light guide part 540 Starting end part 541 Gradual change part 542 First middle Portion 543 First branch portion 544 Second intermediate portion 545 Second branch portion 546 End portion 61, 62, 63 Reflector 7 Lamp chamber

Claims (2)

光を入射させる１個の入射面と、
光を出射させる複数個の出射面と、
前記入射面と前記出射面との間の導光部と、
を備え、
前記導光部は、１個の前記入射面から複数個の前記出射面に徐々に変形させる徐変部分と、前記徐変部分により徐々に変形した複数個の前記出射面から１個の前記出射面を徐々に分岐させる第１分岐部分及び第２分岐部分と、を有し、
前記入射面は、円形をなし、
前記出射面は、前記入射面よりも小径の円形をなし、
複数個の前記出射面は、径が異なる円形をなし、
前記徐変部分は、１個の前記入射面の円形から、複数個の前記出射面の円形を重ねた形状に、徐々に変形させる部分であり、
前記第１分岐部分は、１個の前記出射面の円形を、残りの複数個の前記出射面の円形を重ねた形状から徐々に分岐させる部分であり、
前記第２分岐部分は、前記第１分岐部分よりも、前記入射面から離れた位置に設けられ、１個の前記出射面の円形を、残りの１個の前記出射面の円形から、徐々に分岐させる部分である、
ことを特徴とする車両用導光部材。 One incident surface on which light is incident;
A plurality of emission surfaces for emitting light;
A light guide between the entrance surface and the exit surface;
With
The light guide unit includes a gradually changing portion that gradually deforms from one incident surface to a plurality of the exit surfaces, and one exit from the plurality of exit surfaces that are gradually deformed by the gradually changing portion. a first branch portion and second branch portion to gradually branching plane, was closed,
The incident surface is circular,
The exit surface has a circular shape with a smaller diameter than the entrance surface,
The plurality of exit surfaces are circular with different diameters,
The gradually changing portion is a portion that gradually deforms from a circular shape of one incident surface to a shape in which a plurality of circular shapes of the emitting surface are overlapped,
The first branch portion is a portion that gradually branches the circular shape of one of the exit surfaces from a shape in which the remaining plurality of exit surface circles are overlapped,
The second branch portion is provided at a position farther from the incident surface than the first branch portion, and the circular shape of one of the output surfaces is gradually changed from the circular shape of the remaining one of the output surfaces. The part to be branched
The light guide member for vehicles characterized by the above-mentioned. 灯室を区画するランプハウジングおよびランプレンズと、
前記灯室内に配置されている光源およびリフレクタおよび請求項１に記載の車両用導光部材と、
を備えることを特徴とする車両用灯具。 A lamp housing and a lamp lens that partition the lamp chamber;
A vehicle light guide member according to the lamp light source and a reflector and請 Motomeko 1 are arranged in the room,
A vehicular lamp characterized by comprising:
JP2013029327A 2013-02-18 2013-02-18 Vehicle light guide member, vehicle lamp Active JP6205744B2 (en)

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