JP4683648B2 - Vehicle lamp - Google Patents

Vehicle lamp Download PDF

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JP4683648B2
JP4683648B2 JP2006103353A JP2006103353A JP4683648B2 JP 4683648 B2 JP4683648 B2 JP 4683648B2 JP 2006103353 A JP2006103353 A JP 2006103353A JP 2006103353 A JP2006103353 A JP 2006103353A JP 4683648 B2 JP4683648 B2 JP 4683648B2
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和典 夏目
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Koito Manufacturing Co Ltd
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Description

本発明は新規な車輌用灯具に関する。詳しくは、導光体によって発光ダイオード（以下、「ＬＥＤ」という）の光を前面カバーの内面近傍まで確実に導光し、かつ、ほぼ灯具光軸方向に出射させることができると共に、該導光体の出射端面を前面カバーの内面に沿って配置することができる技術に関する。   The present invention relates to a novel vehicular lamp. Specifically, the light guide can reliably guide the light of a light emitting diode (hereinafter referred to as “LED”) to the vicinity of the inner surface of the front cover, and can be emitted almost in the direction of the optical axis of the lamp. The present invention relates to a technique capable of arranging an emission end surface of a body along an inner surface of a front cover.

灯室の奥の方に配置したＬＥＤの光を灯室の前面を覆う前面カバーの近傍まで導くのに透明材料から成る導光体を使用した車輌用灯具が特許文献１に示されている。導光体によって、ＬＥＤの光が四囲に拡散することなく、効率よく前面カバーから出射される。   Japanese Patent Application Laid-Open No. 2003-228561 discloses a vehicular lamp that uses a light guide made of a transparent material to guide light from an LED disposed in the back of the lamp chamber to the vicinity of a front cover that covers the front of the lamp chamber. By the light guide, the light from the LED is efficiently emitted from the front cover without diffusing into the four sides.

特開２００３−１４１９０９号公報JP 2003-141909 A

ところで、前記した特許文献１に示された車輌用灯具にあっては、前面カバーが灯具光軸に対してほぼ垂直になるように位置したものであり、ＬＥＤの光を効率よく前方へ出射させることができる。   By the way, in the vehicle lamp shown in Patent Document 1 described above, the front cover is positioned so as to be substantially perpendicular to the lamp optical axis, and the light from the LED is efficiently emitted forward. be able to.

しかしながら、車輌用灯具は、車体のデザインとの整合性が強く要求されるものであり、特に、車体の側方に配置される車輌用灯具にあっては、前面カバーが灯具光軸にほぼ垂直の状態になる、すなわち、照射方向にほぼ正対していることの方が希である。   However, the vehicular lamp is strongly required to be consistent with the design of the vehicle body. In particular, in the vehicular lamp disposed on the side of the vehicle body, the front cover is substantially perpendicular to the optical axis of the lamp. In other words, it is rare to be in the state of FIG.

そして、前記特許文献１に示された車輌用灯具にあっては、前面カバーが側方へ大きく回り込んだ形状となっている場合、ＬＥＤの光が前面カバーから出射する際に灯具光軸に対して斜めに出射してしまい、灯具光軸方向からの視認性が低下するという問題がある。   In the vehicular lamp shown in Patent Document 1, when the front cover has a shape that largely wraps around to the side, when the light from the LED is emitted from the front cover, On the other hand, there is a problem that the light is emitted obliquely and the visibility from the lamp optical axis direction is lowered.

そこで、本発明は、導光体によってＬＥＤの光を前面カバーの内面近傍まで確実に導光し、かつ、ほぼ灯具光軸方向に出射させることができると共に、該導光体の出射端面を前面カバーの内面に沿って配置することを課題とする。   Therefore, the present invention can reliably guide the LED light to the vicinity of the inner surface of the front cover by the light guide and can emit the light almost in the direction of the optical axis of the lamp. It makes it a subject to arrange | position along the inner surface of a cover.

本発明車輌用灯具は、上記した課題を解決するために、前面が透明な前面カバーによって覆われた灯室内に、複数のＬＥＤと、透明材料で板状に形成され、後端面に形成された入射端面と前端面の出射端面を有し、該出射端面が前記前面カバーの内面にほぼ沿うように位置し、前記入射端面から入射した前記ＬＥＤの光を前端の出射端面へと導光して該出射端面から出射する導光体とを備え、前記ＬＥＤの光が上記出射端面から灯具光軸方向に出射するために、前記ＬＥＤの光軸が灯具光軸に対して傾斜した状態となるように、前記ＬＥＤを前記入射端面に対向させて配置し、前記入射端面から入射し前記導光体の内部において前記ＬＥＤの光軸方向に導光された光が、前記出射端面から前記灯具光軸方向に屈折して出射するようにしたものである。 In order to solve the above-described problems, the vehicular lamp of the present invention is formed in a plate shape with a plurality of LEDs and a transparent material in a lamp chamber covered with a transparent front cover on the front surface, and formed on the rear end surface. It has an exit end face of an entrance end face and a front end face, and the exit end face is positioned substantially along the inner surface of the front cover, and guides the LED light incident from the entrance end face to the exit end face of the front end. A light guide that exits from the exit end face, and the light of the LED exits from the exit end face in the direction of the lamp optical axis so that the optical axis of the LED is inclined with respect to the lamp optical axis. The LED is disposed so as to face the incident end surface, and the light incident from the incident end surface and guided in the optical axis direction of the LED inside the light guide is transmitted from the output end surface to the lamp optical axis. those to be emitted is refracted in the direction A.

従って、本発明車輌用灯具は、導光体によってＬＥＤの光を前面カバーの内面近傍まで確実に導光し、かつ、導光体の出射端面からほぼ灯具光軸方向に出射させることができると共に、該導光体の出射端面を前面カバーの内面に沿って配置することができる。 Therefore, the vehicular lamp of the present invention can reliably guide the LED light to the vicinity of the inner surface of the front cover by the light guide, and can emit the light from the exit end face of the light guide in the direction of the lamp optical axis. The light emitting end surface of the light guide can be disposed along the inner surface of the front cover.

本発明車輌用灯具は、前面が透明な前面カバーによって覆われた灯室内に、複数のＬＥＤと、透明材料で板状に形成され、後端面に形成された入射端面と前端面の出射端面を有し、該出射端面が前記前面カバーの内面にほぼ沿うように位置し、前記入射端面から入射した前記ＬＥＤの光を前端の出射端面へと導光して該出射端面から出射する導光体とを備え、前記ＬＥＤの光が上記出射端面から灯具光軸方向に出射するために、前記ＬＥＤの光軸が灯具光軸に対して傾斜した状態となるように、前記ＬＥＤを前記入射端面に対向させて配置し、前記入射端面から入射し前記導光体の内部において前記ＬＥＤの光軸方向に導光された光が、前記出射端面から前記灯具光軸方向に屈折して出射するようにしたことを特徴とする。 The vehicular lamp according to the present invention is formed in a plate shape with a plurality of LEDs and a transparent material in a lamp chamber covered with a transparent front cover on the front surface, and includes an incident end surface formed on the rear end surface and an output end surface of the front end surface. A light guide that is positioned so that the emission end face is substantially along the inner surface of the front cover, guides the light of the LED incident from the incidence end face to the emission end face of the front end, and emits the light from the emission end face In order that the light of the LED is emitted in the lamp optical axis direction from the emission end face, the LED is placed on the incident end face so that the optical axis of the LED is inclined with respect to the lamp optical axis. The light is disposed opposite to each other so that light incident from the incident end surface and guided in the optical axis direction of the LED inside the light guide is refracted and emitted from the emission end surface in the lamp optical axis direction. It is characterized by that.

従って、本発明車輌用灯具にあっては、導光体によってＬＥＤの光を前面カバーの内面近傍まで確実に導光し、かつ、導光体の出射端面からほぼ灯具光軸方向に出射させることができると共に、該導光体の出射端面を前面カバーの内面に沿って配置することができる。 Therefore, in the vehicular lamp according to the present invention, the light of the LED is reliably guided to the vicinity of the inner surface of the front cover by the light guide, and is emitted almost in the lamp optical axis direction from the emission end face of the light guide. In addition, the exit end face of the light guide can be disposed along the inner surface of the front cover.

請求項３に記載した発明にあっては、前記ＬＥＤを囲む位置の少なくとも一部にＬＥＤからの直射光を前方へ向けて反射するリフレクタを備えたので、ＬＥＤの光のうち導光体に入射しない光を有効に利用することができる。 In the invention described in claim 3 , since the reflector for reflecting the direct light from the LED forward is provided at least at a part of the position surrounding the LED, it is incident on the light guide body among the light of the LED. The light that does not can be used effectively.

請求項４に記載した発明にあっては、前記入射端面には前記ＬＥＤの光を該ＬＥＤの光軸に沿うように集光させる光制御手段を設けたので、ＬＥＤから導光体に入射した光を効率よく灯具光軸方向に出射させることができる。 In the invention described in claim 4 , since the light control means for condensing the light of the LED along the optical axis of the LED is provided on the incident end face, the light enters the light guide from the LED. Light can be efficiently emitted in the direction of the lamp optical axis.

請求項５に記載した発明にあっては、前記導光体を前記ＬＥＤの発光色と同系色の透明材料で形成したので、非点灯時にあっては、導光体の色がリフレクタに映り込み、特異な外観を呈し見栄えが良好になる。 In the invention described in claim 5 , since the light guide is made of a transparent material having the same color as the light emission color of the LED, the color of the light guide is reflected on the reflector when the LED is not lit. It has a unique appearance and looks good.

以下に、本発明車輌用灯具を実施するための最良の形態を図面を参照して説明する。   The best mode for carrying out the vehicular lamp of the present invention will be described below with reference to the drawings.

図示した車輌用灯具１は、自動車の前面又は後面の両側部に配置される標識灯であり、ランプボディ２の前面が透明な前面カバー３によって覆われて灯室が画成されている。ランプボディ２の前面開口２ａは車体（図示せず）の中心側の部分から側方へかけて後方（照射方向側を前方、その反対側を後方として説明する）へ急角度で変位していくように湾曲している。   The illustrated vehicle lamp 1 is a marker lamp disposed on both sides of the front or rear of an automobile, and a lamp chamber is defined by a front surface of a lamp body 2 covered with a transparent front cover 3. The front opening 2a of the lamp body 2 is displaced at a steep angle from the center side portion of the vehicle body (not shown) to the rear (explained with the irradiation direction side as the front and the opposite side as the rear). Is so curved.

前記灯室４内部で後方寄りの位置に光源として複数のＬＥＤ５が配置されている。ＬＥＤ５の光軸ａｘは灯具光軸ｍｘ（車輌用灯具１の照射方向）に対して所定角度θａを有している。   A plurality of LEDs 5 are arranged as light sources in a position closer to the rear in the lamp chamber 4. The optical axis ax of the LED 5 has a predetermined angle θa with respect to the lamp optical axis mx (the irradiation direction of the vehicular lamp 1).

前記ＬＥＤ５の光は導光体６によって前記前面カバー３の内面近傍へと導光される。導光体６は、例えば、アクリル樹脂、ポリカーボネート等の透明な合成樹脂等の透明な材料によって板状に形成され、板厚方向が灯具光軸ｍｘに対してほぼ垂直となる向きで配置される。図示した実施の形態では、板厚方向がほぼ上下方向に沿う向きで配置されるが、灯具の形状によっては、板厚方向が左右方向であっても或いは上下方向に対して斜めに方向になるように配置しても良い。   The light of the LED 5 is guided to the vicinity of the inner surface of the front cover 3 by the light guide 6. The light guide 6 is formed in a plate shape by a transparent material such as a transparent synthetic resin such as acrylic resin or polycarbonate, and is arranged in a direction in which the plate thickness direction is substantially perpendicular to the lamp optical axis mx. . In the illustrated embodiment, the plate thickness direction is arranged in a direction substantially along the vertical direction. However, depending on the shape of the lamp, even if the plate thickness direction is the horizontal direction, the thickness direction is oblique to the vertical direction. You may arrange as follows.

前記導光体６の前端面である出射端面６ａが前面カバー３の内面３ａに近接した状態となるように傾斜されている。また、前記出射端面６ａの全体を覆うように魚眼ステップ状の拡散ステップ７が多数形成されている。   The light-emitting body 6 is inclined so that the emission end face 6a, which is the front end face of the light guide 6, is in a state of being close to the inner face 3a of the front cover 3. In addition, a number of fish-eye step-like diffusion steps 7 are formed so as to cover the entire emission end face 6a.

導光体６の後端部には複数の入射端面６ｂが形成されており、該入射端面６ｂに対向するように前記ＬＥＤ５が配置されている。そして、前記入射端面６ｂには、該入射端面６ｂから入射したＬＥＤ５の光が該ＬＥＤ５の光軸ａｘに沿って進むように集光させる光制御手段、例えば、フレネルステップ８が形成されている。   A plurality of incident end faces 6b are formed at the rear end portion of the light guide 6, and the LEDs 5 are arranged so as to face the incident end faces 6b. The incident end face 6b is formed with light control means, for example, Fresnel step 8, for condensing the light of the LED 5 incident from the incident end face 6b so as to travel along the optical axis ax of the LED 5.

ＬＥＤ５を上下から囲む位置にリフレクタ９が設けられ、ＬＥＤ５から出射した光のうち導光体６に入射しない光を前方へ反射するようになっている。なお、リフレクタ９の反射面は単一の曲面でも或いは複数の反射セグメントからなるものでも良く、図示した実施の形態では複数の反射セグメント９ａから成る。また、図示した実施の形態では、リフレクタ９をＬＥＤ５を上下から囲む位置に設けたが、一部、例えば、上方だけ或いは下方だけに設けても良い。リフレクタ９が全くない場合よりは、ＬＥＤ５の光をより有効に利用することができる。   A reflector 9 is provided at a position surrounding the LED 5 from above and below, so that light that does not enter the light guide 6 out of light emitted from the LED 5 is reflected forward. The reflecting surface of the reflector 9 may be a single curved surface or a plurality of reflecting segments. In the illustrated embodiment, the reflecting surface is composed of a plurality of reflecting segments 9a. In the illustrated embodiment, the reflector 9 is provided at a position surrounding the LED 5 from above and below. However, the reflector 9 may be provided only partially, for example, only above or below. The light from the LED 5 can be used more effectively than when there is no reflector 9 at all.

前記した車輌用灯具１にあっては、ＬＥＤ５が点灯すると、該ＬＥＤ５から出射した光は導光体６を介して又はリフレクタ９を介して前方へ出射される。すなわち、導光体６の入射端面６ａから導光体６内に入射した光Ｌｉ（図１に一部のものを示す）はフレネルステップ８によってＬＥＤ５の光軸ａｘとほぼ平行な光となるように集光されて前方へと向かい、また、導光体６内に入射しなかった光Ｌｏ（図２に一部のものを示す）の全部又は一部はリフレクタ９によって反射されて前方へと向かう。そして、導光体６内を進んだ光Ｌｉは導光体６の出射端面６ａから拡散ステップ７によって拡散され、かつ、主光軸ｂｘが灯具光軸ｍｘに沿うように屈折されて出射し、さらに、前面カバー３を透過して前方へ照射される。また、リフレクタ９によって反射された光Ｌｏは前面カバー３を透過して略前方へ照射される。   In the vehicle lamp 1 described above, when the LED 5 is turned on, the light emitted from the LED 5 is emitted forward through the light guide 6 or the reflector 9. That is, the light Li (a part of which is shown in FIG. 1) that has entered the light guide 6 from the incident end surface 6a of the light guide 6 becomes light substantially parallel to the optical axis ax of the LED 5 by the Fresnel step 8. The light Lo (not shown in FIG. 2) that has not been incident on the light guide 6 is reflected by the reflector 9 and travels forward. Head. Then, the light Li traveling in the light guide 6 is diffused from the emission end face 6a of the light guide 6 by the diffusion step 7 and refracted so that the main optical axis bx is along the lamp optical axis mx, and then emitted. Further, the light passes through the front cover 3 and is irradiated forward. Further, the light Lo reflected by the reflector 9 passes through the front cover 3 and is irradiated substantially forward.

前記したように、本発明車輌用灯具１にあっては、ＬＥＤ５の光を導光体６によって前面カバー３の近傍まで導光することができ、さらに、ＬＥＤ５の光が導光体６の出射端面６ａから灯具光軸ｍｘ方向に出射するために、ＬＥＤ５の光軸ａｘが灯具光軸ｍｘに対して傾斜した状態となるように、ＬＥＤ５を導光体６の入射端面６ｂに対向させて配置したので、前面カバー３が照射方向に対して大きく傾斜していても、ＬＥＤ５の光を略前方へ向けて出射させることが出来る。   As described above, in the vehicular lamp 1 of the present invention, the light of the LED 5 can be guided to the vicinity of the front cover 3 by the light guide 6, and the light of the LED 5 is emitted from the light guide 6. In order to emit light from the end face 6a in the direction of the lamp optical axis mx, the LED 5 is disposed to face the incident end face 6b of the light guide 6 so that the optical axis ax of the LED 5 is inclined with respect to the lamp optical axis mx. Therefore, even if the front cover 3 is greatly inclined with respect to the irradiation direction, the light of the LED 5 can be emitted substantially forward.

なお、ＬＥＤ５から導光体６に入射した光の導光体６からの出射方向は出射端面６ａの面方向に依存するため、複数のＬＥＤ５を有する場合、各ＬＥＤ５の光軸ａｘが主光軸ｍｘとの間に成す角度θａは、基本的には各ＬＥＤ５毎に異なる。   In addition, since the output direction from the light guide 6 of the light incident on the light guide 6 from the LED 5 depends on the surface direction of the output end surface 6a, when there are a plurality of LEDs 5, the optical axis ax of each LED 5 is the main optical axis. The angle θa formed with mx basically differs for each LED 5.

また、導光体６をＬＥＤ５の発光色と同系色の透明材料で形成しておくと、非点灯時にあっては、導光体６の色がリフレクタ９に映り込み、特異な外観を呈し見栄えが良好になる。   Further, if the light guide 6 is formed of a transparent material similar in color to the light emission color of the LED 5, the color of the light guide 6 is reflected on the reflector 9 when it is not lit, and it has a unique appearance and looks good. Will be better.

さらに、上記実施の形態において示した各部の形状及び構造は、何れも本発明を実施するに際して行う具体化の一例を示したものにすぎず、これらによって本発明の技術的範囲が限定的に解釈されることがあってはならないものである。   Furthermore, the shapes and structures of the respective parts shown in the above embodiments are merely examples of specific implementations when carrying out the present invention, and the technical scope of the present invention is limitedly interpreted by these. It should not be done.

図面は本発明を自動車用標識灯に適用した実施の形態を示すものであり、本図は水平断面図である。The drawings show an embodiment in which the present invention is applied to an automobile marker lamp, and this figure is a horizontal sectional view. 図１のＩＩ−ＩＩ線に沿う断面図である。It is sectional drawing which follows the II-II line | wire of FIG.

符号の説明Explanation of symbols

１…車輌用灯具、３…前面カバー、４…灯室、５…ＬＥＤ、６…導光体、６ａ…出射端面、６ｂ…入射端面、８…フレネルステップ、９…リフレクタ、ａｘ…ＬＥＤの光軸、ｍｘ…灯具光軸、Ｌｉ…導光体内に入射した光 DESCRIPTION OF SYMBOLS 1 ... Vehicle lamp, 3 ... Front cover, 4 ... Light chamber, 5 ... LED, 6 ... Light guide, 6a ... Outlet end surface, 6b ... Incident end surface, 8 ... Fresnel step, 9 ... Reflector, ax ... LED light Axis, mx ... light optical axis , Li ... light incident on the light guide

Claims (5)

前面が透明な前面カバーによって覆われた灯室内に、
複数の発光ダイオード（以下、「ＬＥＤ」という）と、
透明材料で板状に形成され、後端面に形成された入射端面と前端面の出射端面を有し、該出射端面が前記前面カバーの内面にほぼ沿うように位置し、前記入射端面から入射した前記ＬＥＤの光を前端の出射端面へと導光して該出射端面から出射する導光体とを備え、
前記ＬＥＤの光が前記出射端面から灯具光軸方向に出射するために、前記ＬＥＤの光軸が前記灯具光軸に対して傾斜した状態となるように、前記ＬＥＤを前記入射端面に対向させて配置し、
前記入射端面から入射し前記導光体の内部において前記ＬＥＤの光軸方向に導光された光が、前記出射端面から前記灯具光軸方向に屈折して出射するようにした
ことを特徴とする車輌用灯具。 In the lamp room covered with a transparent front cover,
A plurality of light emitting diodes (hereinafter referred to as “LEDs”);
It is formed in a plate shape with a transparent material, and has an incident end surface formed on the rear end surface and an output end surface of the front end surface, and the output end surface is positioned substantially along the inner surface of the front cover, and is incident from the incident end surface. A light guide that guides the light of the LED to the exit end face of the front end and exits from the exit end face;
Since the LED light is emitted from the emission end face in the lamp optical axis direction, the LED is opposed to the incident end face so that the optical axis of the LED is inclined with respect to the lamp optical axis. arrangement and,
The light incident from the incident end face and guided in the optical axis direction of the LED inside the light guide is refracted and emitted from the emission end face in the lamp optical axis direction. Vehicle lamp. 前記ＬＥＤが複数配置され、該複数のＬＥＤのそれぞれに対応する前記入射端面が前記板状の導光体において複数形成されたA plurality of the LEDs are arranged, and a plurality of the incident end faces corresponding to each of the plurality of LEDs are formed in the plate-shaped light guide.
ことを特徴とする請求項１に記載の車輌用灯具。The vehicular lamp according to claim 1. 前記ＬＥＤを囲む位置の少なくとも一部にＬＥＤからの直射光を前方へ向けて反射するリフレクタを備えた
ことを特徴とする請求項１又は請求項２に記載の車輌用灯具。 The vehicle lamp according to claim 1 or 2 , further comprising a reflector that reflects the direct light from the LED forward at least at a part of a position surrounding the LED. 前記入射端面には前記ＬＥＤの光を該ＬＥＤの光軸に沿うように集光させる光制御手段を設けた
ことを特徴とする請求項１、請求項２又は請求項３に記載の車輌用灯具。 4. The vehicular lamp according to claim 1 , wherein light incident means for condensing the light of the LED along the optical axis of the LED is provided on the incident end face. 5. . 前記導光体を前記ＬＥＤの発光色と同系色の透明材料で形成した
ことを特徴とする請求項１、請求項２、請求項３又は請求項４に記載の車輌用灯具。 The vehicular lamp according to claim 1 , 2, 3, or 4 , wherein the light guide is formed of a transparent material having a color similar to the light emission color of the LED.
JP2006103353A 2006-04-04 2006-04-04 Vehicle lamp Expired - Fee Related JP4683648B2 (en)

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