JP2016195137A - Vehicular lighting fixture - Google Patents

Vehicular lighting fixture Download PDF

Info

Publication number
JP2016195137A
JP2016195137A JP2016163213A JP2016163213A JP2016195137A JP 2016195137 A JP2016195137 A JP 2016195137A JP 2016163213 A JP2016163213 A JP 2016163213A JP 2016163213 A JP2016163213 A JP 2016163213A JP 2016195137 A JP2016195137 A JP 2016195137A
Authority
JP
Japan
Prior art keywords
light
light guide
led
incident
guide body
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2016163213A
Other languages
Japanese (ja)
Other versions
JP6215415B2 (en
Inventor
佐藤　浩二
Koji Sato
浩二 佐藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Stanley Electric Co Ltd
Original Assignee
Stanley Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Stanley Electric Co Ltd filed Critical Stanley Electric Co Ltd
Priority to JP2016163213A priority Critical patent/JP6215415B2/en
Publication of JP2016195137A publication Critical patent/JP2016195137A/en
Application granted granted Critical
Publication of JP6215415B2 publication Critical patent/JP6215415B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

PROBLEM TO BE SOLVED: To achieve appearance with a depth feeling at the time of light emission, and to allow a light emission surface to emit light more evenly than a conventional one.SOLUTION: A vehicular lighting fixture 1 includes: an LED 3; a light guide body 4 arranged so that an incident part 41 of a side end part opposes the LED 3, and for making the light emitted from the LED 3 enter from the incident part 41 and emit from an emission surface 43 on the front surface; an inner lens 5 arranged in front of the light guide body 4 by interposing a clearance part S between itself and the light guide body 4; and a pair of extensions 6, 6 arranged on both sides in the vertical direction or longitudinal direction of the clearance part S and for making the light emitted from the emission surface 43 of the light guide body 4 enter the inner lens 5 while reflecting the light. On the rear surface of the light guide body 4, a plurality of prism cuts for reflecting the light entered from the incident part 41 of the side end part frontward are formed at a cut pitch of 1 mm or less. The clearance part S is provided so that a distance in the cross direction between the light guide body 4 and the inner lens 5 becomes at least 30 mm.SELECTED DRAWING: Figure 2

Description

本発明は、車両用灯具に関する。   The present invention relates to a vehicular lamp.

従来、車両に搭載される各種の車両用灯具として、ＬＥＤ（発光ダイオード）から出射した光を導光体によって配光制御するものが知られている。   2. Description of the Related Art Conventionally, various types of vehicle lamps mounted on a vehicle are known in which light emitted from an LED (light emitting diode) is controlled by a light guide.

この種の車両用灯具として、例えば特許文献１に記載のものでは、略平板状の導光体（ＢＴインナーレンズ９）の側端面にＬＥＤが対向配置されており、当該ＬＥＤから出射した光を導光体の側端面から当該導光体内に入射させて前面から出射させることにより、この導光体の前面を発光させている。   As this type of vehicle lamp, for example, in the one described in Patent Document 1, an LED is disposed opposite to a side end surface of a substantially flat light guide (BT inner lens 9), and light emitted from the LED is emitted from the LED. By making it enter into the said light guide body from the side end surface of a light guide, and making it radiate | emit from a front surface, the front surface of this light guide is light-emitted.

特開２００６−４９２３２号公報JP 2006-49232 A

しかしながら、ＬＥＤから出射される光は、ランバーシャン分布の光強度を有する指向性の強いものであり、出射面から法線方向（光軸に沿った方向）に出射するものが最も強度が高く、光軸からの出射角が大きいものほど強度が低くなる。
そのため、上記特許文献１に記載の車両用灯具では、ＬＥＤから出射した指向性の強い光がそのまま側端面から導光体内に入射する結果、導光体の発光面（前面）のうちＬＥＤの光軸上に対応する部分が他の部分よりも強く発光して例えば線状のスジムラなどになってしまい、当該発光面を均一に発光させることができない。 However, the light emitted from the LED is highly directional with light intensity of Lambertian distribution, and the light emitted from the emission surface in the normal direction (direction along the optical axis) has the highest intensity, The intensity decreases as the emission angle from the optical axis increases.
For this reason, in the vehicular lamp described in Patent Document 1, light with strong directivity emitted from the LED is directly incident on the light guide body from the side end face, and as a result, the light from the LED on the light emitting surface (front surface) of the light guide body. The portion corresponding to the axis emits light more strongly than the other portions, resulting in, for example, linear stripes and the like, and the light emitting surface cannot emit light uniformly.

本発明は、上記事情を鑑みてなされたもので、従来に比べて発光面をより均一に発光させることができる車両用灯具の提供を課題とする。   This invention is made | formed in view of the said situation, and makes it a subject to provide the vehicle lamp which can light-emit a light-emitting surface more uniformly compared with the past.

上記課題を解決するために、請求項１に記載の発明は、車両用灯具において、
ＬＥＤと、
側端部を前記ＬＥＤと対向させるように配置され、前記ＬＥＤから出射した光を前記側端部から入射させて前面から出射させる導光体と、
前記導光体との間に間隙部を介在させつつ当該導光体の前方に配置されたレンズと、
前記間隙部に対して前後方向と略直交する方向の両側に配置され、前記導光体の前面から出射した光を反射させつつ前記レンズに入射させる一対の反射部材と、
を備え、
前記導光体の後面には、前記側端部から当該導光体内に入射した光を前方へ反射させるための複数のプリズムカットが、１ｍｍ以下のカットピッチで形成され、
前記間隙部は、前記導光体と前記レンズとの間の前後方向の距離が少なくとも３０ｍｍ空くように設けられていることを特徴とする。 In order to solve the above problems, the invention according to claim 1 is a vehicle lamp,
LED,
A light guide that is arranged so that the side end faces the LED, and makes light emitted from the LED enter from the side end and exit from the front surface;
A lens disposed in front of the light guide while interposing a gap between the light guide and the light guide;
A pair of reflecting members that are disposed on both sides in a direction substantially perpendicular to the front-rear direction with respect to the gap, and that enter the lens while reflecting light emitted from the front surface of the light guide;
With
On the rear surface of the light guide, a plurality of prism cuts for reflecting light incident on the light guide from the side end portion forward is formed with a cut pitch of 1 mm or less,
The gap portion is provided so that a distance in the front-rear direction between the light guide and the lens is at least 30 mm.

請求項２に記載の発明は、請求項１に記載の車両用灯具において、
前記導光体の前面に、当該前面から出射した光を拡散させる拡散シートが設けられていることを特徴とする。 The invention according to claim 2 is the vehicle lamp according to claim 1,
A diffusion sheet for diffusing light emitted from the front surface is provided on the front surface of the light guide.

請求項３に記載の発明は、請求項１又は２に記載の車両用灯具において、
前記一対の反射部材は、前記間隙部に対して上下方向又は左右方向の両側に配置され、前方に向かって互いの距離が狭窄するように設けられていることを特徴とする。 The invention according to claim 3 is the vehicle lamp according to claim 1 or 2,
The pair of reflecting members are arranged on both sides in the vertical direction or the horizontal direction with respect to the gap, and are provided so that the distance from each other is narrowed toward the front.

本発明によれば、ＬＥＤから出射した光が、導光体の側端部から当該導光体内に入射して、１ｍｍ以下のカットピッチで形成された微細な複数のプリズムカットで反射されて前面から出射し、一対の反射部材によって反射されつつ間隙部を前方へ通過した後に、レンズを透過して前方へ照射される。これにより、導光体の前面から広がりをもって出射した光が、一対の反射部材によって集光するように反射されながらレンズを透過するので、ＬＥＤからの光を導光体の前面から単純に出射させていただけの従来に比べ、レンズの発光面をよりムラ無く，より均一に発光させることができる。   According to the present invention, the light emitted from the LED enters the light guide from the side end portion of the light guide and is reflected by a plurality of fine prism cuts formed with a cut pitch of 1 mm or less. After passing through the gap while being reflected by the pair of reflecting members, the light passes through the lens and is irradiated forward. As a result, the light emitted from the front surface of the light guide spreads through the lens while being reflected so as to be collected by the pair of reflecting members, so that the light from the LED is simply emitted from the front surface of the light guide. Compared with conventional ones, the light emitting surface of the lens can be made to emit light more evenly and more uniformly.

実施形態における車両用灯具の正面図である。It is a front view of the vehicular lamp in an embodiment. 図１のII−II線での断面図である。It is sectional drawing in the II-II line of FIG. 図１のIII−III線での断面図である。It is sectional drawing in the III-III line of FIG. 実施形態における複数のＬＥＤ及び導光体を前方から見た図である。It is the figure which looked at several LED and light guide in an embodiment from the front. 実施形態における導光体の入光部の（ａ）斜視図であり、（ｂ）正面図である。It is (a) perspective view of the light-incidence part of the light guide in embodiment, (b) It is a front view. （ａ）図５（ｂ）のIV−IV線での断面図であり、（ｂ）図５（ｂ）のＶ−Ｖ線での断面図である。(A) It is sectional drawing in the IV-IV line of FIG.5 (b), (b) It is sectional drawing in the VV line of FIG.5 (b). （ａ）図６（ａ）の断面での光線軌跡を示す図であり、（ｂ）図６（ｂ）の断面での光線軌跡を示す図である。(A) It is a figure which shows the light ray locus in the cross section of Fig.6 (a), (b) It is a figure which shows the light ray locus in the cross section of FIG.6 (b).

以下、本発明の実施形態について、図面を参照して説明する。
図１は、本実施形態における車両用灯具１の正面図であり、図２及び図３は、図１のII−II線及びIII−III線での断面図であり、図４は、車両用灯具１が備える複数のＬＥＤ３，…及び導光体４を前方から見た図である。
なお、以下の説明では、「前」「後」「左」「右」「上」「下」との記載は、特に断りのない限り、車両用灯具１から見た方向を意味するものとする。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a front view of a vehicular lamp 1 according to the present embodiment, FIGS. 2 and 3 are cross-sectional views taken along lines II-II and III-III in FIG. 1, and FIG. It is the figure which looked at several LED3 ... and the light guide 4 with which the lamp 1 is provided from the front.
In the following description, “front”, “rear”, “left”, “right”, “upper”, and “lower” refer to the direction viewed from the vehicular lamp 1 unless otherwise specified. .

図１〜図３に示すように、車両用灯具１は、前面が開口した図示しないハウジングと、当該ハウジングの前面開口を覆う素通しのアウターレンズ２とを備えている。これらハウジング及びアウターレンズ２で形成される灯室の内部には、複数のＬＥＤ（発光ダイオード）３，…（図４参照）と、導光体４と、インナーレンズ５と、一対のエクステンション６，６とが収容されている。   As shown in FIGS. 1 to 3, the vehicular lamp 1 includes a housing (not shown) whose front surface is open and a transparent outer lens 2 that covers the front opening of the housing. Inside the lamp chamber formed by these housing and outer lens 2, a plurality of LEDs (light emitting diodes) 3,... (See FIG. 4), a light guide 4, an inner lens 5, and a pair of extensions 6, 6 are housed.

このうち、複数のＬＥＤ３，…は、図３及び図４に示すように、それぞれの光軸Ａｘを左右方向に沿って右方へ向けた状態で上下方向に沿って略等間隔で並設され、共通する基板３０上に実装されている。各ＬＥＤ３は、ランバーシャン分布の光強度を有する光を、光軸Ａｘを中心に右方へ略放射状に出射させる。つまり、各ＬＥＤ３から出射する光は、光軸Ａｘを基準とした出射角が大きいものほど強度が低くなる。   Among these, as shown in FIGS. 3 and 4, the plurality of LEDs 3,... Are arranged in parallel at substantially equal intervals in the vertical direction with their optical axes Ax directed rightward along the horizontal direction. Are mounted on a common substrate 30. Each LED 3 emits light having a light intensity of Lambertian distribution substantially radially to the right about the optical axis Ax. That is, the intensity of the light emitted from each LED 3 decreases as the emission angle with respect to the optical axis Ax becomes larger.

導光体４は、右方へ開口するコ字状の主面を有する板状に形成され、前後方向と略直交するように配置されている。より詳しくは、導光体４は、正面視で灯室の周縁に沿って配置されるとともに、左側端部を複数のＬＥＤ３，…に対向させるように当該複数のＬＥＤ３，…の右方に配置されている。この導光体４は、複数のＬＥＤ３，…から出射した光を当該導光体４内に入射させる複数の入光部４１，…を左側端部に有するとともに、後面が反射面４２とされ、前面が出射面４３とされている。
このうち、複数の入光部４１，…は、複数のＬＥＤ３，…に対応させて設けられており、それぞれが対応するＬＥＤ３に対向するように上下方向に並設されている。 The light guide 4 is formed in a plate shape having a U-shaped main surface that opens to the right, and is disposed so as to be substantially orthogonal to the front-rear direction. More specifically, the light guide 4 is disposed along the periphery of the lamp chamber in a front view, and is disposed on the right side of the plurality of LEDs 3,... So that the left end is opposed to the plurality of LEDs 3,. Has been. The light guide 4 has a plurality of light incident portions 41 that allow light emitted from the plurality of LEDs 3 to enter the light guide 4 at the left end portion, and a rear surface is a reflection surface 42. The front surface is an emission surface 43.
Among these, the some light-incidence part 41, ... is provided corresponding to several LED3, ..., and is arranged in parallel by the up-down direction so that each may correspond to LED3 corresponding.

図５（ａ），（ｂ）は、導光体４の入光部４１の斜視図及び正面図であり、図６（ａ），（ｂ）は、図５（ｂ）のIV−IV線，Ｖ−Ｖ線での断面図である。
これらの図に示すように、導光体４の左側端部は、上下方向に略一様な断面で左方へ膨出する形状に形成されるとともに、上下方向と直交する面内で延在する溝部４ａを各ＬＥＤ３に対向する部分にそれぞれ有しており、この溝部４ａを含む部分が入光部４１となっている。
この入光部４１は、溝部４ａ内に形成された第一入射面４１１及び第二入射面４１２と、内部反射面４１３とを有している。 5A and 5B are a perspective view and a front view of the light incident portion 41 of the light guide 4, and FIGS. 6A and 6B are IV-IV lines in FIG. 5B. , V-V sectional view.
As shown in these drawings, the left end of the light guide 4 is formed in a shape that bulges to the left with a substantially uniform cross section in the vertical direction, and extends in a plane orthogonal to the vertical direction. Groove portions 4a are provided in portions facing the respective LEDs 3, and a portion including the groove portions 4a is a light incident portion 41.
The light incident portion 41 includes a first incident surface 411 and a second incident surface 412 formed in the groove portion 4a, and an internal reflection surface 413.

このうち、第一入射面４１１は、前後方向と直交する各断面では、光軸Ａｘを含んで上下方向に直交する面と当該断面との交線（光軸Ａｘを含む断面では光軸Ａｘ）を中心として、左方に向かうに連れて当該交線から離れつつ凹状に緩やかに湾曲するように上下方向の両側に形成された２つの第一円弧線Ｌ１，Ｌ１と、交線上での当該２つの第一円弧線Ｌ１，Ｌ１の交点をＲ付けする第二円弧線Ｌ２と、を有する形状に形成されている。なお、本実施形態では、各第一円弧線Ｌ１がＲ１．６に形成され、第二円弧線Ｌ２がＲ０．６以下に形成されている。また、本実施形態では、第二円弧線Ｌ２は、前後方向と直交する断面において光軸Ａｘを基準とする出射角θｖが０°〜４０°の範囲の光を導光体４内に入射させるように形成されており、各第一円弧線Ｌ１は、出射角θｖが４０°〜８０°の範囲の光を導光体４内に入射させるように形成されている。
また、第一入射面４１１は、上下方向と直交する各断面では、光軸Ａｘを含んで上下方向に平行な面と当該断面との交線上の点が頂点となるように左方へ膨出する凸状に形成されている。なお、本実施形態では、第一入射面４１１は、上下方向と直交する断面において光軸Ａｘを基準とする出射角θｈが０°〜５０°の範囲の光を導光体４内に入射させるように形成されている。
このように形成された第一入射面４１１は、対向するＬＥＤ３から出射した光を、前後方向と直交する断面では上下方向へやや拡散（例えば片側５°程度の拡散角）させ、上下方向と直交する断面では光軸Ａｘに略沿った平行光とするか前後方向にやや拡散させながら、導光体４内へ入射させる（図７（ａ），（ｂ）参照）。 Among these, the first incident surface 411 includes, in each cross section orthogonal to the front-rear direction, an intersection line between the surface including the optical axis Ax and orthogonal to the vertical direction (the optical axis Ax in the cross section including the optical axis Ax). And two first arcs L1 and L1 formed on both sides in the vertical direction so as to be gently curved in a concave shape while leaving the intersection line as it goes to the left, and the two on the intersection line It is formed in a shape having a second arc line L2 that attaches an intersection of two first arc lines L1, L1. In the present embodiment, each first arc line L1 is formed at R1.6, and the second arc line L2 is formed at R0.6 or less. Further, in the present embodiment, the second arc line L2 causes light having an emission angle θv in the range of 0 ° to 40 ° relative to the optical axis Ax to enter the light guide 4 in a cross section orthogonal to the front-rear direction. Each first arc line L1 is formed so that light having an emission angle θv in the range of 40 ° to 80 ° is incident on the light guide 4.
Further, the first incident surface 411 bulges to the left so that the point on the intersection line between the plane including the optical axis Ax and parallel to the vertical direction and the cross section is the apex in each cross section orthogonal to the vertical direction. It is formed in a convex shape. In the present embodiment, the first incident surface 411 causes light having an emission angle θh in the range of 0 ° to 50 ° relative to the optical axis Ax to enter the light guide 4 in a cross section perpendicular to the vertical direction. It is formed as follows.
The first incident surface 411 formed in this manner diffuses light emitted from the opposing LED 3 slightly in the vertical direction in a cross section orthogonal to the front-rear direction (for example, a diffusion angle of about 5 ° on one side) and orthogonal to the vertical direction. In the cross section, the light is incident on the light guide 4 while being parallel light substantially along the optical axis Ax or slightly diffused in the front-rear direction (see FIGS. 7A and 7B).

第二入射面４１２は、第一入射面４１１の前後方向の両側端から左方へ立設された面である。この第二入射面４１２は、上下方向と直交する断面において、対向するＬＥＤ３から出射した光のうち、第一入射面４１１よりも前後方向の側方へ向かうものを、導光体４内へ入射させる（図７（ｂ）参照）。なお、本実施形態においては、第二入射面４１２は、上下方向と直交する断面における出射角θｈが５０°〜７０°の範囲の光を導光体４内に入射させるように形成されており、導光体４内への入射光量を５〜１０％程度増加させる。   The second incident surface 412 is a surface erected to the left from both side ends of the first incident surface 411 in the front-rear direction. This second incident surface 412 is incident on the light guide body 4 in the cross section perpendicular to the vertical direction, from the light emitted from the opposing LED 3 toward the side in the front-rear direction from the first incident surface 411. (See FIG. 7B). In the present embodiment, the second incident surface 412 is formed so that light having an emission angle θh in a cross section perpendicular to the vertical direction is incident in the light guide 4 within a range of 50 ° to 70 °. The amount of light incident on the light guide 4 is increased by about 5 to 10%.

内部反射面４１３は、第二入射面４１２の先端（左端）から右方へ向かって前後方向の外側（光軸Ａｘから離間する方向）へ広がるように傾斜した面である。この内部反射面４１３は、第二入射面４１２から導光体４内へ入射した光を、光軸Ａｘに略沿った平行光としつつ右方へ内部反射させる（図７（ｂ）参照）。   The internal reflection surface 413 is a surface that is inclined so as to spread outward (in the direction away from the optical axis Ax) in the front-rear direction from the tip (left end) of the second incident surface 412 to the right. The internal reflection surface 413 internally reflects the light that has entered the light guide 4 from the second incident surface 412 to the right while being parallel light substantially along the optical axis Ax (see FIG. 7B).

導光体４の反射面４２には、図示は省略するが、入光部４１から当該導光体４内に入射した光を前方へ反射させるための微細な複数のプリズムカットが形成されている。この複数のプリズムカットは、略左右方向に沿って並設されており、カットピッチが１ｍｍ以下となっている。また、この複数のプリズムカットは、導光体４の右側のものほど左側へ傾くように形成されている。   Although not shown in the drawings, the reflective surface 42 of the light guide 4 is formed with a plurality of fine prism cuts for reflecting light incident on the light guide 4 from the light incident portion 41 forward. . The plurality of prism cuts are arranged side by side along substantially the left-right direction, and the cut pitch is 1 mm or less. The plurality of prism cuts are formed so that the right side of the light guide 4 is inclined to the left side.

導光体４の出射面４３上には、図２及び図３に示すように、入光部４１の近傍を除く略全面に亘って拡散シート７が設けられている。この拡散シート７は、前後両面にシボ加工（例えば、棚澤八光社のシボ規格でＴＨ１１０又はＴＨ１１５相当）が施された厚さ約０．５ｍｍのシートであり、導光体４の出射面４３から出射した光を拡散させつつ前方へ透過させる。   As shown in FIGS. 2 and 3, the diffusion sheet 7 is provided on the light exit surface 43 of the light guide 4 over substantially the entire surface excluding the vicinity of the light incident portion 41. This diffusion sheet 7 is a sheet having a thickness of about 0.5 mm, which has been subjected to graining (for example, TH110 or TH115 equivalent to the grain standard of Tanazawa Yako Co., Ltd.) on both front and rear sides. The light emitted from 43 is transmitted forward while diffusing.

インナーレンズ５は、導光体４と同様の正面視形状，つまり右方へ開口するコ字状に形成され（図１参照）、導光体４との間に３０〜５０ｍｍ程度の間隙部Ｓを介在させた状態で、当該導光体４の前方に配置されている。このインナーレンズ５は、長手方向と直交する断面での形状が、前方への凸状に形成されており、より詳しくは、後方へやや広がりつつ開口する略コ字状に形成されている。なお、インナーレンズ５には、部分的にシボ加工などを施してもよい。   The inner lens 5 is formed in a front view shape similar to that of the light guide 4, that is, in a U-shape opening rightward (see FIG. 1), and a gap S of about 30 to 50 mm between the light guide 4. The light guide 4 is disposed in front of the light guide 4 in a state of interposing. The inner lens 5 has a cross-sectional shape perpendicular to the longitudinal direction formed in a convex shape toward the front. More specifically, the inner lens 5 is formed in a substantially U-shape that opens slightly backward. In addition, the inner lens 5 may be partially subjected to embossing or the like.

一対のエクステンション６，６は、前後方向に略沿った平板を正面視で右方へ開口する略コ字状に屈曲させた形状にそれぞれ形成されており、やや小さな正面視コ字状に形成された灯具内側のものと、これよりも大きな正面視コ字状に形成された灯具外側のものとで対をなしている（図１参照）。この一対のエクステンション６，６は、導光体４とインナーレンズ５との間の間隙部Ｓに対して上下方向又は左右方向の両側に配置されており、前方に向けて互いの距離が狭窄するようにやや傾斜している。また、一対のエクステンション６，６は、間隙部Ｓに面する各面が、例えばアルミニウム皮膜などが蒸着された反射面６１となっている。   The pair of extensions 6 and 6 are each formed in a shape obtained by bending a flat plate substantially along the front-rear direction into a substantially U-shape that opens to the right in front view, and is formed in a slightly smaller U-shape in front view. A pair of a lamp inside the lamp and a lamp outside the lamp formed in a U-shape larger than the front view are paired (see FIG. 1). The pair of extensions 6 and 6 are disposed on both sides of the gap S between the light guide 4 and the inner lens 5 in the vertical direction or the horizontal direction, and the distance from each other is narrowed toward the front. Is slightly inclined. The pair of extensions 6 and 6 each have a reflective surface 61 on which, for example, an aluminum film or the like is vapor-deposited.

続いて、車両用灯具１の発光態様について説明する。
車両用灯具１では、複数のＬＥＤ３，…を点灯させると、図７（ａ），（ｂ）に示すように、各ＬＥＤ３から出射した光が、当該ＬＥＤ３に対向する入光部４１を通じて導光体４内に入射する。 Then, the light emission aspect of the vehicle lamp 1 is demonstrated.
In the vehicular lamp 1, when a plurality of LEDs 3,... Are lit, the light emitted from each LED 3 is guided through the light incident portion 41 facing the LED 3, as shown in FIGS. Incident into the body 4.

具体的には、ＬＥＤ３から出射した光のうち、入光部４１の第一入射面４１１に入射したものが、当該第一入射面４１１を通じ、前後方向と直交する断面では上下方向へやや拡散され、上下方向と直交する断面では光軸Ａｘに略沿った平行光とされながら、導光体４内へ入射する。
一方、ＬＥＤ３から出射した光のうち、第一入射面４１１よりも前後方向の側方へ向かうものは、第二入射面４１２を通じて導光体４内に入射した後に、内部反射面４１３によって光軸Ａｘに略沿った平行光とされつつ右方へ内部反射される。 Specifically, of the light emitted from the LED 3, the light incident on the first incident surface 411 of the light incident portion 41 is slightly diffused in the vertical direction through the first incident surface 411 in a cross section orthogonal to the front-rear direction. In the cross section perpendicular to the vertical direction, the light enters the light guide 4 while being parallel light substantially along the optical axis Ax.
On the other hand, of the light emitted from the LED 3, the light that goes to the side in the front-rear direction with respect to the first incident surface 411 is incident on the light guide 4 through the second incident surface 412, and then the optical axis by the internal reflection surface 413. Internally reflected rightward while being parallel light substantially along Ax.

こうして、各ＬＥＤ３から略放射状に出射した光は、入光部４１を通じて、上下方向（すなわち導光体４の幅方向）へ拡散されるとともに前後方向（すなわち導光体４の厚さ方向）へ集光されながら、導光体４内に入射する。これにより、ＬＥＤ３，…から出射した光は、導光体４の全域に亘って満遍なく広がるように当該導光体４内に入射する。   Thus, the light emitted from each LED 3 in a substantially radial manner is diffused in the vertical direction (that is, the width direction of the light guide 4) through the light incident portion 41 and in the front-rear direction (that is, the thickness direction of the light guide 4). The light enters the light guide 4 while being condensed. Thereby, the light emitted from the LEDs 3,... Enters the light guide 4 so as to spread evenly over the entire area of the light guide 4.

複数の入光部４１，…から導光体４内に入射した光は、当該導光体４内を上下方向へ広がりつつ右方へ導光しながら当該導光体４後面の反射面４２によって前方へ反射された後に、導光体４前面の出射面４３から前方へ出射される。   The light that has entered the light guide 4 from the plurality of light incident portions 41,... Is guided by the reflecting surface 42 on the rear surface of the light guide 4 while being guided in the right direction while spreading in the light guide 4 in the vertical direction. After being reflected forward, it is emitted forward from the emission surface 43 on the front surface of the light guide 4.

導光体４の出射面４３から出射した光は、図２に示すように、拡散シート７を通じて上下方向及び左右方向に拡散された後に、一対のエクステンション６，６の反射面６１によって集光するように反射されながら間隙部Ｓを前方へ通過する。そして、この光は、インナーレンズ５を透過した後に、素通しのアウターレンズ２を通じて前方へ照射される。
こうして、車両用灯具１を正面から見たときに、インナーレンズ５が全面に亘って発光する。 As shown in FIG. 2, the light emitted from the emission surface 43 of the light guide 4 is diffused in the vertical direction and the horizontal direction through the diffusion sheet 7, and then collected by the reflection surfaces 61 of the pair of extensions 6 and 6. As it is reflected, it passes through the gap S forward. Then, after passing through the inner lens 5, this light is irradiated forward through the transparent outer lens 2.
Thus, when the vehicular lamp 1 is viewed from the front, the inner lens 5 emits light over the entire surface.

以上のように、車両用灯具１によれば、前方への凸状に形成されたインナーレンズ５が発光するので、発光時の見栄えを奥行き感（立体感）のあるものとすることができる。
また、導光体４の出射面４３から広がりをもって出射した光が、一対のエクステンション６，６によって集光するように反射されながらインナーレンズ５を透過するので、ＬＥＤからの光を導光体の前面から単純に出射させていただけの従来に比べ、インナーレンズ５の発光面をよりムラ無く，より均一に発光させることができる。 As described above, according to the vehicular lamp 1, the inner lens 5 formed in a forward convex shape emits light, so that the appearance at the time of light emission can have a sense of depth (three-dimensional effect).
In addition, since the light emitted from the light exit surface 43 of the light guide 4 spreads through the inner lens 5 while being reflected by the pair of extensions 6 and 6, the light from the LED is transmitted through the light guide. Compared to the conventional case in which the light is simply emitted from the front surface, the light emitting surface of the inner lens 5 can be made to emit light more uniformly and more uniformly.

なお、本発明を適用可能な実施形態は、上述した実施形態に限定されることなく、本発明の趣旨を逸脱しない範囲で適宜変更可能である。   The embodiments to which the present invention can be applied are not limited to the above-described embodiments, and can be appropriately changed without departing from the spirit of the present invention.

例えば、上記実施形態では、一対のエクステンション６，６が間隙部Ｓの上下方向又は左右方向の両側に配置されることとしたが、当該一対のエクステンション６，６は、間隙部Ｓに対して前後方向と略直交する方向の両側に配置されていればよい。また、当該エクステンション６，６は、間隙部Ｓの四方を囲うように配置されていてもよい。   For example, in the above-described embodiment, the pair of extensions 6 and 6 are arranged on both sides in the vertical direction or the left-right direction of the gap S, but the pair of extensions 6 and 6 are front and rear with respect to the gap S. What is necessary is just to be arrange | positioned at the both sides of the direction substantially orthogonal to a direction. Further, the extensions 6 and 6 may be arranged so as to surround the four sides of the gap S.

１ 車両用灯具
３ ＬＥＤ
４ 導光体
４１ 入光部
４２ 反射面
４３ 出射面
５ インナーレンズ（レンズ）
６ エクステンション（反射部材）
６１ 反射面
７ 拡散シート
Ｓ 間隙部 1 Vehicle lamp 3 LED
4 Light Guide 41 Light Incident Part 42 Reflecting Surface 43 Output Surface 5 Inner Lens (Lens)
6 Extension (reflective member)
61 Reflecting surface 7 Diffusion sheet S Gap

Claims (3)

ＬＥＤと、
側端部を前記ＬＥＤと対向させるように配置され、前記ＬＥＤから出射した光を前記側端部から入射させて前面から出射させる導光体と、
前記導光体との間に間隙部を介在させつつ当該導光体の前方に配置されたレンズと、
前記間隙部に対して前後方向と略直交する方向の両側に配置され、前記導光体の前面から出射した光を反射させつつ前記レンズに入射させる一対の反射部材と、
を備え、
前記導光体の後面には、前記側端部から当該導光体内に入射した光を前方へ反射させるための複数のプリズムカットが、１ｍｍ以下のカットピッチで形成され、
前記間隙部は、前記導光体と前記レンズとの間の前後方向の距離が少なくとも３０ｍｍ空くように設けられていることを特徴とする車両用灯具。 LED,
A light guide that is arranged so that the side end faces the LED, and makes light emitted from the LED enter from the side end and exit from the front surface;
A lens disposed in front of the light guide while interposing a gap between the light guide and the light guide;
A pair of reflecting members that are disposed on both sides in a direction substantially perpendicular to the front-rear direction with respect to the gap, and that enter the lens while reflecting light emitted from the front surface of the light guide;
With
On the rear surface of the light guide, a plurality of prism cuts for reflecting light incident on the light guide from the side end portion forward is formed with a cut pitch of 1 mm or less,
The vehicular lamp, wherein the gap portion is provided so that a distance in the front-rear direction between the light guide and the lens is at least 30 mm. 前記導光体の前面に、当該前面から出射した光を拡散させる拡散シートが設けられていることを特徴とする請求項１に記載の車両用灯具。   The vehicular lamp according to claim 1, wherein a diffusion sheet for diffusing light emitted from the front surface is provided on the front surface of the light guide. 前記一対の反射部材は、前記間隙部に対して上下方向又は左右方向の両側に配置され、前方に向かって互いの距離が狭窄するように設けられていることを特徴とする請求項１又は２に記載の車両用灯具。   The pair of reflecting members are disposed on both sides in the vertical direction or the horizontal direction with respect to the gap portion, and are provided so that the distance from each other is narrowed toward the front. The vehicle lamp as described in 2.
JP2016163213A 2016-08-24 2016-08-24 Vehicle lighting Active JP6215415B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2016163213A JP6215415B2 (en) 2016-08-24 2016-08-24 Vehicle lighting

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2016163213A JP6215415B2 (en) 2016-08-24 2016-08-24 Vehicle lighting

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP2012255773A Division JP5996395B2 (en) 2012-11-22 2012-11-22 Vehicle lighting

Publications (2)

Publication Number Publication Date
JP2016195137A true JP2016195137A (en) 2016-11-17
JP6215415B2 JP6215415B2 (en) 2017-10-18

Family

ID=57323750

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2016163213A Active JP6215415B2 (en) 2016-08-24 2016-08-24 Vehicle lighting

Country Status (1)

Country Link
JP (1) JP6215415B2 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080225548A1 (en) * 2007-03-16 2008-09-18 Eichelberger Christopher L Illuminating device
JP2010225388A (en) * 2009-03-23 2010-10-07 Stanley Electric Co Ltd Vehicular signal lighting fixture
JP2011198536A (en) * 2010-03-18 2011-10-06 Koito Mfg Co Ltd Lamp tool for vehicle
JP3176743U (en) * 2012-04-10 2012-07-05 株式会社クラレ High-mount stop lamp for vehicles

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080225548A1 (en) * 2007-03-16 2008-09-18 Eichelberger Christopher L Illuminating device
JP2010225388A (en) * 2009-03-23 2010-10-07 Stanley Electric Co Ltd Vehicular signal lighting fixture
JP2011198536A (en) * 2010-03-18 2011-10-06 Koito Mfg Co Ltd Lamp tool for vehicle
JP3176743U (en) * 2012-04-10 2012-07-05 株式会社クラレ High-mount stop lamp for vehicles

Also Published As

Publication number Publication date
JP6215415B2 (en) 2017-10-18

Similar Documents

Publication Publication Date Title
JP5657358B2 (en) Vehicle lighting
JP5538089B2 (en) Vehicle lamp unit
JP6569882B2 (en) Vehicle lighting
JP6709095B2 (en) Vehicle lighting
JP6560514B2 (en) Vehicle lighting
JP5545811B2 (en) Vehicle lighting
JP2012243493A (en) Vehicular signal lamp
JP2012028155A (en) Lamp unit for vehicle
US10598334B2 (en) Vehicle lamp
JP6829973B2 (en) Lamp unit
JP5801164B2 (en) Vehicle lighting
JP2022020240A5 (en)
JP2016085829A (en) Vehicular lighting fixture
JP2017183231A (en) Lamp
JP5708991B2 (en) Vehicle lamp and light guide lens used in vehicle lamp
JP2013171813A (en) Vehicle lamp
JP5977872B2 (en) Vehicle lighting
JP5883109B2 (en) Vehicle lighting
JP6215415B2 (en) Vehicle lighting
JP5996395B2 (en) Vehicle lighting
JP2021125444A (en) Vehicular lighting fixture
JP7052556B2 (en) Vehicle lighting
JP5808995B2 (en) Vehicle lighting
JP2013168269A (en) Vehicular lamp
JP6013109B2 (en) Vehicle lighting

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20160824

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20170531

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20170613

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20170905

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20170920

R150 Certificate of patent or registration of utility model

Ref document number: 6215415

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250