JP2004220912A

JP2004220912A - Vehicular lighting device

Info

Publication number: JP2004220912A
Application number: JP2003006657A
Authority: JP
Inventors: Hisaya Morishita; 久弥森下; Masashi Kobayashi; 正史小林
Original assignee: Ichikoh Industries Ltd
Current assignee: Ichikoh Industries Ltd
Priority date: 2003-01-15
Filing date: 2003-01-15
Publication date: 2004-08-05

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular lighting device with improved appearance compatible with its performance, coping with the recent vehicle with innovative design requiring the lighting device matching with the design, and coping with the requirement of innovative design for the lighting device itself. SOLUTION: The structure for lighting front side is composed of reflectors reflecting the light irradiated from an electric bulb 5 divided at each reflecting areas, and an irradiation lens 23. Respective reflectors are constructed so that the vertical size become larger as it is headed backward. Further, the height of the irradiation lens is made lower than the combined height of a first reflector 13 at forefront and a second reflector 14. As a result, it becomes easy to make the shape of the vehicular lighting device match with the design of the vehicle having a slanted front part, further, the appearance is tremendously improved by using the irradiation lens 23. COPYRIGHT: (C)2004,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
この発明は、車両用灯具にかかるものである。特に、この発明は、寸法的な制限がある場合でも、光源から照射される光を有効に利用し、性能の向上を図る車両用灯具に関するものである。
【０００２】
【従来の技術】
従来の車両用灯具は、寸法的な制約がある場合に、複数の反射面とレンズを併用することにより、その寸法に合わせつつ、反射面だけでなくレンズも使用することにより、良好な配光特性を得ている（例えば、特許文献１参照）。
【０００３】
【特許文献１】
特開２００２−４２５１７号公報（第５−９頁、第１図）
【０００４】
【発明が解決しようとする課題】
ところが、当該車両用灯具を装着する近年の車両のデザインは革新的なものも多く、車両用灯具も外部から見られることから、車両のデザインの一つの要素であるため、前方を照らす機械的な性能のみでなく、外観の向上も求められる場合がある。また、そのデザインの関係上、車両用灯具をそのデザインに合わせた場合に、必要な性能を出せない場合がある。それとは逆に、必要な性能を確保するため、デザインが制限される場合がある。
【０００５】
そこで、この発明は、斬新なデザインを求められる車両に使用する車両用灯具において、外観の斬新さを出すことを第一の目的とし、デザイン面から寸法が制約されている場合でも、前方を照射する性能の向上を図ることを第二の目的とする。
【０００６】
【課題を解決するための手段】
上記の目的を達成するために、請求項１にかかる発明は、光源と、照射レンズと、メインリフレクタと、サブリフレクタと、第１リフレクタと、第２リフレクタと、第３リフレクタと、第４リフレクタとを備え、前記光源は発光部を内設し、さらに、口金が設けられており、前記の各リフレクタはそれぞれ反射面を有し、光源は側方または上下方向より、前方に傾斜を付けて設けられており、メインリフレクタは光源の後方で、光源及び前方に反射面を向けて設けられ、メインリフレクタの前方で、且つ、光源の近傍にはサブリフレクタが、前方及び光源に反射面を向けて設けられ、メインリフレクタの前方で、且つ、光源の口金の後方近傍には、第３リフレクタが光源及び第４リフレクタに反射面を向けて設けられ、メインリフレクタの外側には第４リフレクタが、第３リフレクタ及び前方に反射面を向けて設けられ、光源の前方で当該光源の口金の近傍には、第１リフレクタが光源及び第２リフレクタに反射面を向けて設けられ、さらに、光源の前方には第２リフレクタが、第１リフレクタ及び前方に反射面を向けて設けられ、照射レンズは、光源の前方で、第１リフレクタの前方から側方にかけて囲むように設けられていることを特徴とする。
【０００７】
即ち、この車両用灯具では、リフレクタを各リフレクタに分け、さらに、照射レンズを使用することにより、車両用灯具全体を所定の寸法に収めている。この結果、車両のデザインに沿った車両用灯具にできるとともに、車両用灯具自体に斬新な外観を得ることができる。
【０００８】
また、請求項２にかかる発明は、光源と、照射レンズと、メインリフレクタと、サブリフレクタと、第１リフレクタと、第２リフレクタと、第３リフレクタと、第４リフレクタとを備え、光源には発光部が内設しており、メインリフレクタはメイン反射面を有し、サブリフレクタはサブ反射面を有し、第１リフレクタは第１反射面を有し、第２リフレクタは第２反射面を有し、第３リフレクタは第３反射面を有し、第４リフレクタは第４反射面を有し、メイン反射面は光源内の発光部が照射する光のうち、後方に照射される光の所定の範囲の光を前方に反射し、サブ反射面は発光部が照射する光のうち、後方に照射され、前記メイン反射面に照射される範囲の外側の一部の範囲の光を前方に反射し、第３反射面は光源が照射する光のうち、後方に照射され、前記メイン反射面に照射される範囲の外側で、前記サブリフレクタに照射される範囲以外の一部の範囲を第４反射面側に反射し、第４反射面は第３反射面で反射し、当該第４反射面に到達した光を前方に反射し、第１反射面は発光部が照射する光のうち、前方に照射される光の所定の範囲の光を第２反射面側に反射し、第２反射面は第１反射面で反射し、当該第２反射面に到達した光を前方に反射し、照射レンズは光源が照射する光のうち、前方に照射され、前記第１反射面に照射される範囲の内側で、前記第１反射面に照射される範囲以外の一部の範囲の光を当該車両用灯具の照射方向に向けて屈折することを特徴とする。
【０００９】
即ち、この車両用灯具では、上記と同様に、リフレクタを各リフレクタに分けることにより、光源からの照射光は、その範囲ごとにリフレクタ単体、若しくはリフレクタの組合せによって前方に反射され、また、光源からの照射光の一部は、リフレクタと併設された照射レンズによって前方に屈折される。この結果、光源からの光源から照射される光を有効に活用できるため、前方を照らす性能を高めることができる。
【００１０】
また、請求項３にかかる発明は、光源と、照射レンズと、メインリフレクタと、サブリフレクタと、第１リフレクタと、第２リフレクタと、第３リフレクタと、第４リフレクタとを備え、前記光源は発光部を内設し、さらに、口金が設けられており、メインリフレクタは光源内の発光部付近に焦点を有する曲面の一部から成るメイン反射面を有し、サブリフレクタは発光部付近に焦点を有する曲面の一部から成るサブ反射面を有し、第１リフレクタは発光部付近に焦点を有し、且つ、第２反射面との間に前部第２焦点を有する曲面の一部から成る第１反射面を有し、第２リフレクタは第１反射面との間の前部第２焦点付近に焦点を有する第２反射面を有し、第３リフレクタは発光部付近に焦点を有し、且つ、第４反射面との間に後部第２焦点を有する曲面の一部から成る第３反射面を有し、第４リフレクタは第３反射面との間の後部第２焦点付近に焦点を有する第４反射面を有し、照射レンズは光源が照射する光のうち、前方に照射され、前記第１反射面に照射される範囲の内側で、前記第１反射面に照射される範囲以外の一部の範囲の光を当該車両用灯具の照射方向に向けて屈折し、メイン反射面は光源内の発光部が照射する光のうち、後方に照射される光の所定の範囲の光を前方に反射し、サブ反射面は発光部が照射する光のうち、後方に照射され、前記メイン反射面に照射される範囲の外側の一部の範囲の光を前方に反射し、第３反射面は光源が照射する光のうち、後方に照射され、前記メイン反射面に照射される範囲の外側で、前記サブリフレクタに照射される範囲以外の一部の範囲を第４反射面側に反射し、第４反射面は第３反射面で反射し、当該第４反射面に到達した光を前方に反射し、第１反射面は発光部が照射する光のうち、前方に照射される光の所定の範囲の光を第２反射面側に反射し、第２反射面は第１反射面で反射し、当該第２反射面に到達した光を前方に反射し、光源は口金の中心よりも、発光部の方が前方になるように傾けて設けられており、メインリフレクタは光源の後方で、発光部からの照射光をメイン反射面で前方に反射できる角度に傾けて設けられ、サブリフレクタは、メインリフレクタの前方で、且つ、光源の近傍の位置で、発光部からの照射光をサブ反射面で前方に反射できる角度に傾けて設けられており、第３リフレクタは、メインリフレクタの前方で、且つ、光源の口金の後方近傍の位置で、発光部からの照射光を第３反射面で第４反射面に向けて反射できる角度に傾けて設けられ、第４リフレクタは、メインリフレクタの外側の位置で、第３反射面からの光を前方に向けて反射できる角度に傾けて設けられ、第１リフレクタは、光源の口金の前方近傍の位置で、発光部からの照射光を第１反射面で第２反射面に向けて反射できる角度に傾けて設けられ、第２リフレクタは、光源の前方の位置で、第１反射面からの光を前方に向けて反射できる角度に傾けて設けられ、照射レンズは、光源の前方で、第１リフレクタの前方から側方にかけて円弧状に囲むように設けられていることを特徴とする。
【００１１】
即ち、この車両用灯具では、上記と同様に、光源からの照射光の範囲ごとに分けたリフレクタと照射レンズにより、光源から照射される光を有効活用していると同時に、車両用灯具を所定の寸法に収めている。この結果、車両のデザインに沿った車両用灯具にできるとともに、照射レンズを使用したことにより、斬新な外観を得ることができ、さらに、前方を照らす性能を高めることができる。
【００１２】
【発明の実施の形態】
以下、この発明につき図面を参照しつつ詳細に説明する。なお、この実施の形態によりこの発明が限定されるものではない。また、下記実施の形態における構成要素には、当業者が置換可能、且つ、容易に想定できるもの或いは実質的に同一のものが含まれる。尚、車両用灯具の光源として、ハロゲン電球、白熱電球および放電灯があるが、実施の形態としてハロゲン電球について説明する。
【００１３】
以下の説明は、車両用灯具が照射する方向を前方とし、電球の接続端子がある側を下側として説明する。図１は、この発明の実施の形態に係る車両用灯具を示す断面図である。図２は、図１に示した車両用灯具の要部のＡＡ矢視図である。図３は、図１に示した車両用灯具の要部のＢＢ矢視図である。図４は、図１に示した車両用灯具の照射光の反射経路を示す図である。図５は、図１に示した車両用灯具の要部の斜視図である。尚、この実施の形態では、光源となる電球５に内設している発光部６は、実際には所定の大きさを有しているが、便宜上、点状で形成しているものとして説明している。また、以下の説明は、前方を照射するための各反射面および照射レンズ２３の構成のみを説明しているものであり、それらの固定方法は省略してある。同図に示す車両用灯具１は、ランプハウジング２とランプレンズ３とにより、灯室４が区画されている。灯室４内には、車両用灯具１の光源として電球５が配置されている。この電球５は、ランプハウジング２の下側の面に固定されており、前方に斜めに傾けられた状態で固定されている。また、電球５内には、通電により発光するフィラメントが発光部６として内設している。
【００１４】
また、灯室４内には、メインリフレクタ１１、サブリフレクタ１２、第１リフレクタ１３、第２リフレクタ１４、第３リフレクタ１５、第４リフレクタ１６、照射レンズ２３が配置されている。メインリフレクタ１１は、電球５の後方に設けられている。その形状は、前方から見た場合、電球５内の発光部６を中心とした上半部のみの半円状になっている。また、側方から見た場合は、メインリフレクタ上部中央部１１ａがメインリフレクタ下部中央部１１ｂよりも前方になり、上側から見た場合は、メインリフレクタ下部中央部１１ｂよりもメインリフレクタ下部端部１１ｃの方が前方になる形状に、曲面で形成されている。サブリフレクタ１２は、メインリフレクタ１１と電球５との間にあり、電球５の後方に設けられている。その形状は、前方から見た場合、サブリフレクタ外側部１２ａが、電球５内の発光部６を中心とした上半部のみの半円状になっており、この半円状の形状に、同様に発光部６を中心とした上半部のみの半円状のサブリフレクタ内側部１２ｄの形状の切欠きが施された形状となっている。また、側方から見た場合は、サブリフレクタ外側部中央部１２ｂがサブリフレクタ内側部中央部１２ｅよりも前方になり、上側から見た場合は、サブリフレクタ内側部下部１２ｆよりもサブリフレクタ外側部下部１２ｃの方が前方になる形状に、曲面で形成されている。
【００１５】
第１リフレクタ１３は、電球５の前側にあり、電球５の口金８付近に設けられている。その形状は、四方の曲線部を持つ四角形状の曲面から形成されており、第１リフレクタ前部中央部１３ａが第１リフレクタ後部中央部１３ｃより上側になり、また、第１リフレクタ前部端部１３ｂが第１リフレクタ前部中央部１３ａよりも上側に、第１リフレクタ後部端部１３ｄが第１リフレクタ後部中央部１３ｃよりも上側になる曲面で形成されている。第２リフレクタ１４は、電球５の前側にあり、電球５内の発光部６よりも上側で電球５の近傍に設けられている。その形状は、四方の曲線部を持つ四角形状の曲面から形成されており、第２リフレクタ前部中央部１４ａが第２リフレクタ後部中央部１４ｃより上側になり、また、第２リフレクタ前部中央部１４ａが第２リフレクタ前部端部１４ｂよりも上側に、第２リフレクタ後部中央部１４ｃが第２リフレクタ後部端部１４ｄよりも上側になる曲面で形成されている。
【００１６】
第３リフレクタ１５は、メインリフレクタ１１と電球５との間にあり、電球５の口金８付近に設けられている。その形状は、四方の曲線部を持つ四角形状の曲面から形成されており、第３リフレクタ後部中央部１５ｃが第３リフレクタ前部中央部１５ａより上側になり、また、第３リフレクタ前部端部１５ｂが第３リフレクタ前部中央部１５ａよりも上側に、第３リフレクタ後部端部１５ｄが第３リフレクタ後部中央部１５ｃよりも上側になる曲面で形成されている。第４リフレクタ１６は、メインリフレクタ１１の上側にあり、第４リフレクタ下部中央部１６ｂは、メインリフレクタ上部中央部１１ａの付近にある。この第４リフレクタ１６を前方若しくは前方よりやや下側より見た場合に当該第４リフレクタ１６の形状は、メインリフレクタ上部中央部１１ａ付近を中心とした上半部のみの半円状の形状となっている。また、側方からみた場合は、第４リフレクタ上部中央部１６ａが第４リフレクタ下部中央部１６ｂよりも前方になり、上側から見た場合は、第４リフレクタ下部中央部１６ｂよりも第４リフレクタ下部端部１６ｃの方が前方になる形状に、曲面で形成されている。
【００１７】
メインリフレクタ１１の前側の面にはメイン反射面１７が、サブリフレクタ１２の前側の面にはサブ反射面１８が、第１リフレクタ１３の電球５側の面には第１反射面１９が、第２リフレクタ１４の前側の面には第２反射面２０が、第３リフレクタ１５の上側の面には第３反射面２１が、第４リフレクタ１６の前側の面には第４反射面２２が、それぞれ設けられている。また、発光部６の近傍の点を焦点Ｆ１、発光部６の前方付近にある点を前部第２焦点Ｆ２、発光部６の後方で、上側にずれた位置にある点を前部第２焦点Ｆ３とする。また、焦点Ｆ１を前後方向に通る仮想の直線を中心線３２とする。
【００１８】
メイン反射面１７は、焦点Ｆ１を焦点とし、中心線３２を中心線として、前方に開いた形状の放物面の一部と、ほぼ一致する形状となっている。この結果、メイン反射面１７は、発光部６から照射される光のうち、第３中間照射光２８から第４中間照射光２９までの範囲の光を前方に反射させることができる。サブ反射面１８は、焦点Ｆ１を焦点とし、中心線３２を中心線として、前方に開いた形状の放物面の一部と、ほぼ一致する形状となっている。この結果、サブ反射面１８は、発光部６から照射される光のうち、第２最前端照射光２５から第３中間照射光２８までの範囲の光を前方に反射させることができる。
【００１９】
第１反射面１９は、焦点Ｆ１と、前部第２焦点Ｆ２との２つの点を焦点とする楕円の一部を、中心線３２を中心として回転して得られた曲面とほぼ一致する形状となっている。この結果、第１反射面１９は、発光部６からの光のうち、第２中間照射光２７から第１最後端照射光３０までの範囲の光を、第２反射面２０側に反射させることができる。第２反射面２０は、前部第２焦点Ｆ２を焦点とし、前方に開いた放物線の一部を、中心線３２を中心として回転して得られた曲面とほぼ一致する形状となっている。この結果、第２反射面２０は、第１反射面１９で反射し、前部第２焦点Ｆ２を通過した後、第２反射面２０に到達した光を前方に反射させることができる。第３反射面２１は、焦点Ｆ１と、後部第２焦点Ｆ３との２つの点を焦点とする楕円の一部を、中心線３２を中心として回転して得られた曲面とほぼ一致する形状となっている。この結果、第３反射面２１は、発光部６からの光のうち、第４中間照射光２９から第２最後端照射光３１までの範囲の光を、第４反射面側２２に反射させることができる。第４反射面２２は、後部第２焦点Ｆ３を焦点とし、前方に開いた放物線の一部を、中心線３２を中心として回転して得られた曲面とほぼ一致する形状となっている。この結果、第４反射面２２は、第３反射面２１で反射し、後部第２焦点Ｆ３を通過した後、第４反射面２２に到達した光を前方に反射させることができる。
【００２０】
照射レンズ２３は、ガラス等の透明の材料から形成されており、電球５の前方に設けられている。この照射レンズ２３は、上側から見た場合に、第１リフレクタ後部中央部１３ｃ付近を中心とした同心円状の形状で、且つ、当該中心よりも前方の部分のみの半円状に、照射レンズ外側部２３ａと照射レンズ内側部２３ｄは形成されている。この照射レンズ外側部２３ａと照射レンズ内側部２３ｄは、照射レンズ外側部２３ａが、外側に凸になった曲面で形成されており、照射レンズ内側部２３ｄは、内側に凸に成った曲面で形成されている。曲面が形成された照射レンズ外側部２３ａと照射レンズ内側部２３ｄとは、照射レンズ上面２３ｇ付近では、ほぼ平行となっており、このため、この平行な部分よりも下の部分では、照射レンズ外側部２３ａと照射レンズ内側部２３ｄとの曲面により、下の方になるにつれて、照射レンズ外側部２３ａと照射レンズ内側部２３ｄとの間の幅が小さくなっている。つまり、照射レンズ上面２３ｇよりも照射レンズ下面２３ｈの方が、幅が狭くなっている。また、照射レンズ外側部上部２３ｂは照射レンズ内側部上部２３ｅよりも上側になっているため、照射レンズ上面２３ｇは、外側から内側にかけて傾斜がついている。また、照射レンズ外側部下部２３ｃと照射レンズ内側部下部２３ｆとでは、上下方向がほぼ同じ高さとなっているため、照射レンズ下面２３ｈは、当該車両用灯具１の照射方向に対して、ほぼ平行の面となっている。この照射レンズ外側部２３ａおよび照射レンズ内側部２３ｄの形状により、当該照射レンズ２３は発光部６からの光のうち、第１中間照射光２６から第２中間照射光２７までの範囲の光を、前方に向けて屈折させることができる。
【００２１】
前記第１リフレクタ後部中央部１３ｃと前記第３リフレクタ前部中央部１５ａの付近のランプハウジング２には、電球５用の挿通孔１０が設けられている。この挿通孔１０は、挿通孔前端１０ａが、挿通孔後端１０ｂよりも前方で、且つ、下側になる向きに、傾斜を付けて設けられている。この挿通孔１０に電球５を下側から挿通固定することにより、当該電球５は前方に傾いた状態になり、さらに、発光部６が所定の位置にくるように組立てられる。この状態の位置にある発光部６を基準として、当該車両用灯具１の各リフレクタおよび照射レンズ２３は構成されている。また、電球５の接続端子９にはコネクタ３３が着脱可能に接続され、電気が供給される。
【００２２】
以下、この車両用灯具１の動作について説明する。コネクタ３３が接続端子９に接続された状態でランプスイッチ（図示省略）を通電側にすると、電球５内にある発光部６が通電により発光する。この発光により発光部６から照射される光のうち、第３中間照射光２８から第４中間照射光２９までの範囲の光は、メイン反射面１７で前方に反射される。その際、メイン反射面１７に向かう光は、メインリフレクタ１１の前方にあるサブリフレクタ１２の、サブリフレクタ内側部１２ｄの内側を通ってメイン反射面１７に照射されるが、このサブリフレクタ内側部１２ｄは、半円状を成している。また、メイン反射面１７は、サブリフレクタ内側部１２ｄが形成されている半円状よりも、大きな半円状で形成されている。さらに、発光部６からの距離は、サブリフレクタ内側部１２ｄまでよりも、メイン反射面１７までの方が長いため、半円状のサブリフレクタ内側部１２ｄの内側部を通った光は、メイン反射面１７に到達するまでの間に拡散され、半円状のメイン反射面１７全体を照射することとなる。また、このメイン反射面１７で反射した光は、サブリフレクタ外側部１２ａを通って前方を照射する。
【００２３】
発光部６から照射される光のうち、第２最前端照射光２５から第３中間照射光２８までの範囲の光は、サブ反射面１８で前方に反射される。サブ反射面１８の前方には第２リフレクタ１４が設けられているが、サブ反射面１８は第２リフレクタ１４よりも外側にあるため、サブ反射面１８で反射した光は、第２リフレクタ１４の外側を通って前方を照射する。発光部６から照射される光のうち、第２中間照射光２７から第１最後端照射光３０までの範囲の光は、第１反射面１９で第２反射面２０に向けて反射される。第２反射面２０に向けて反射された光は、前部第２焦点Ｆ２を通過後、第２反射面２０に到達し、第２反射面２０によって前方に反射される。発光部６から照射される光のうち、第４中間照射光２９から第２最後端照射光３１までの範囲の光は、第３反射面２１で第４反射面２２に向けて反射される。第４反射面２２に向けて反射された光は、後部第２焦点Ｆ３を通過後、第４反射面２２に到達し、第４反射面２２によって前方に反射される。発光部６から照射される光のうち、第１中間照射光２６から第２中間照射光２７までの範囲の光は、ほぼ水平方向から下方にかけて照射されている。この範囲の光は、照射レンズ２３の、照射レンズ外側部２３ａと照射レンズ内側部２３ｄの曲面によって屈折され、前方を照射する。
【００２４】
以上の車両用灯具１は、電球５付近にサブリフレクタ１２が設けられている。電球５付近にあるサブリフレクタ１２は、発光部６から近いため、照射光が拡散する前に、その光を反射できるのでサブ反射面１８を小さくすることができ、サブリフレクタ１２自身を小さくできる。また、第１反射面１９で反射した光は第２反射面２０で反射するが、第２反射面２０は前部第２焦点Ｆ２から近いため、第１反射面１９で反射して前部第２焦点Ｆ２を通過した光が拡散する前に第２反射面２０で前方に反射できるので、第２反射面２０を小さくすることができ、第２リフレクタ１４自身を小さくできる。反対に、メインリフレクタ１１は発光部６から離れているため、拡散した照射光をメイン反射面１７で反射することとなり、メインリフレクタ１１は大きくなる。また、第３反射面２１で反射した光は第４反射面２２で反射するが、第４反射面２２は後部第２焦点Ｆ３から離れているため、第３反射面２１で反射して後部第２焦点Ｆ３を通過した光が拡散した後に第４反射面２２で前方に反射するので、第４反射面２２は大きくなり、第４リフレクタ１６自身も大きくなる。また、照射レンズ２３は、第２反射面２０が前方に反射した光を遮らないように、照射レンズ上面２３ｇが第２リフレクタ１４よりも下側になるように設けてある。
【００２５】
従って、照射レンズ２３および各リフレクタは、後方に行くに従って上側に大きくなるので、ランプレンズ３にランプレンズ傾斜部３ａを設けることができる。この結果、当該車両用灯具１は、前部に傾斜が付いたデザインの車両等に装着しても、そのデザインと一体化させることができる。また、各リフレクタを電球５の口金８から上側のみに形成しているので、従来の車両用灯具と比較して、車両用灯具１全体をコンパクトにできる。この結果、この車両用灯具１を車両用ヘッドランプとして使用することにより、車両のデザインの自由度を飛躍的に高めることができ、商品力の向上を図ることができる。
【００２６】
また、電球５のうち、発光部６からの光を外に出さない部分である遮光塗料部７を、車両用灯具１の寸法を減少させたい部分、つまり、ランプレンズ傾斜部３ａ方向に向かせるために、電球５を当該車両用灯具１の照射方向に対して傾斜を付けて設けてある。この結果、電球５の照射光を発しない部分である遮光塗料部７を、リフレクタの寸法抑えるべき部分に位置させたので、前記のように、後方に行くに従って大きくなるようにリフレクタを構成した場合、各リフレクタ及び照射レンズ２３の配置と、電球５からの照射範囲とが近似する。これにより、電球５からの照射光を効率よく前方を照らす光として利用することができ、当該車両用灯具１の前方を照らす性能が向上する。また、半円状の照射レンズ２３を使用したことにより、斬新な外観を得ることができ、車両用灯具１の商品価値を高め、それに伴い、当該車両用灯具１を装着する車両の外観も向上させることができる。
【００２７】
なお、以上の説明は、前方を照射するための各反射面および照射レンズ２３の構成を説明しているものであるため、各リフレクタ及び照射レンズ２３の固定方法は、どのような構造または方法を用いても構わない。また、実施の形態では、電球５をランプハウジング２に固定し、光軸を調整する場合は車両用灯具１全体の向きを変えるユニット可動型の構成で説明してあるが、電球５をリフレクタに固定し、光軸を調整する場合は、リフレクタの向きを変える構造であるリフレクタ可動型としても良い。また、各反射面は放物面状の曲面、または、回転楕円面状の曲面の一部から形成されているが、これらの反射面は自由曲面で形成してもよい。自由曲面で形成することにより、電球５からの照射光を、より正確に任意の方向に反射させることができ、理想の配光パターンとすることができる。また、当該車両用灯具１は、すれ違い時用のヘッドランプとして使用する場合は、配光パターンをすれ違い時用として各反射面を構成し、走行時用のヘッドランプとして使用する場合は、配光パターンを走行時用として各反射面を構成することにより、必要な配光パターン有する車両用灯具１とすることができる。また、実施の形態では、電球５は、発光部６を１つ内設したものを用いているが、すれ違い時用および走行時用の発光部として、２つの発光部を内設した電球５を用いてもよい。２つの発光部を内設した電球５を使用し、当該電球５に内設した２つの発光部に合わせて各反射面の形状を形成することにより、当該車両用灯具１を用いて、ランプスイッチを切り替えるだけで、すれ違い時用と走行時用の照射光を、必要に応じて使用することができる。
【００２８】
また、実施の形態では、電球５の接続端子９方向を下側としたが、接続端子９方向は横方向や、その他、いずれの向きで使用しても構わない。横方向に使用した場合は、前側の側部が絞り込まれたようなデザインの車両に合わせることができ、車両のデザインを他の向きに絞り込みたい場合でも、その向きに合わせて当該車両用灯具１を装着すれば良いので、車両のデザインの自由度が向上する。また、いずれの場合でも、当該車両用灯具１で使用している照射レンズ２３により、車両の外観を飛躍的に向上させることができる。また、実施の形態ではハロゲン電球を説明したが、電球はハロゲン電球以外の、白熱電球または放電灯でもよい。また、この発明は、車両用ヘッドランプに限らず、電球をとリフレクタを使用し、一方向に照射する灯具ならば、その用途は問わない。
【００２９】
【発明の効果】
以上から明らかなように、この発明にかかる車両用灯具（請求項１）によれば、リフレクタを各リフレクタに分け、さらに、照射レンズを使用することにより、車両のデザインに沿った車両用灯具にすることができる。
【００３０】
また、この発明にかかる車両用灯具（請求項２）によれば、リフレクタを各リフレクタに分け、さらに、照射レンズを併用することにより、電球からの照射光を有効に活用できるため、前方を照らす性能を高めることができる。
【００３１】
また、この発明にかかる車両用灯具（請求項３）によれば、電球からの照射光の範囲ごとにリフレクタを分け、さらに、照射レンズを使用することにより、前方を照らす性能を高めることができると同時に、照射レンズを使用したことにより、斬新な外観を得ることができる。
【図面の簡単な説明】
【図１】この発明にかかる車両用灯具の実施の形態を示す一部断面図である。
【図２】図１の要部のＡＡ矢視図である。
【図３】図１の要部のＢＢ矢視図である。
【図４】実施の形態の照射光の反射経路を示す図である。
【図５】実施の形態の要部の斜視図である。
【符号の説明】
１車両用灯具
５電球
６発光部
８口金
１０挿通孔
１１メインリフレクタ
１２サブリフレクタ
１３第１リフレクタ
１４第２リフレクタ
１５第３リフレクタ
１６第４リフレクタ
１７メイン反射面
１８サブ反射面
１９第１反射面
２０第２反射面
２１第３反射面
２２第４反射面
２３照射レンズ
２４第１最前端照射光
２５第２最前端照射光
２６第１中間照射光
２７第２中間照射光
２８第３中間照射光
２９第４中間照射光
３０第１最後端照射光
３１第２最後端照射光
３２中心線
Ｆ１焦点
Ｆ２前部第２焦点
Ｆ３後部第２焦点[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a vehicular lamp. In particular, the present invention relates to a vehicular lamp that effectively utilizes light emitted from a light source and improves performance even when there are dimensional restrictions.
[0002]
[Prior art]
Conventional luminaires have good light distribution by using multiple reflective surfaces and lenses in combination when there are dimensional restrictions, and by using not only reflective surfaces but also lenses while adjusting to the dimensions. Characteristics are obtained (for example, see Patent Document 1).
[0003]
[Patent Document 1]
JP-A-2002-42517 (page 5-9, FIG. 1)
[0004]
[Problems to be solved by the invention]
However, the design of recent vehicles equipped with the vehicle lamp is often innovative, and since the vehicle lamp is also seen from the outside, it is one element of the vehicle design. In some cases, not only performance but also improvement in appearance is required. In addition, due to the design, when a vehicle lamp is adjusted to the design, required performance may not be obtained. Conversely, designs may be limited to ensure the required performance.
[0005]
Therefore, the present invention has a primary object of providing a novel appearance of a vehicle lamp used for a vehicle requiring a novel design, and irradiates the front even when the dimensions are restricted from the design aspect. A second object is to improve the performance of the system.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, an invention according to claim 1 is a light source, an irradiation lens, a main reflector, a sub reflector, a first reflector, a second reflector, a third reflector, and a fourth reflector. The light source is provided with a light emitting portion inside, further, a base is provided, each of the reflectors has a reflective surface, the light source is inclined forward from the side or up and down direction. The main reflector is provided behind the light source, with the reflecting surface facing the light source and forward, and in front of the main reflector and near the light source, a sub-reflector faces the reflecting surface toward the front and the light source. A third reflector is provided in front of the main reflector and near the rear of the base of the light source with the reflecting surface facing the light source and the fourth reflector. A fourth reflector is provided with the reflecting surface facing the third reflector and forward, and a first reflector is provided in front of the light source and near the base of the light source with the reflecting surface facing the light source and the second reflector. Further, a second reflector is provided in front of the light source with the reflecting surface facing forward with the first reflector, and the illumination lens is provided in front of the light source so as to surround from the front of the first reflector to the side. It is characterized by having been done.
[0007]
That is, in this vehicle lamp, the reflector is divided into each reflector, and further, the entire vehicle lamp is housed in a predetermined size by using an irradiation lens. As a result, it is possible to make the vehicle lamp in accordance with the design of the vehicle, and to obtain a novel appearance in the vehicle lamp itself.
[0008]
The invention according to claim 2 includes a light source, an irradiation lens, a main reflector, a sub reflector, a first reflector, a second reflector, a third reflector, and a fourth reflector. A light emitting unit is provided inside, a main reflector has a main reflection surface, a sub reflector has a sub reflection surface, a first reflector has a first reflection surface, and a second reflector has a second reflection surface. The third reflector has a third reflecting surface, the fourth reflector has a fourth reflecting surface, and the main reflecting surface is a portion of the light emitted by the light emitting portion in the light source that is emitted backward. A predetermined range of light is reflected forward, and the sub-reflection surface is illuminated rearward of the light emitted by the light emitting unit, and forwardly emits a partial range of light outside the range illuminated on the main reflection surface. And the third reflecting surface is the rear of the light emitted by the light source. Outside the range irradiated to the main reflecting surface, and reflects a part of the range other than the range irradiated to the sub-reflector to the fourth reflecting surface side, and the fourth reflecting surface is a third reflecting surface. And the light that has reached the fourth reflecting surface is reflected forward, and the first reflecting surface is used to reflect, within the light emitted by the light emitting unit, light within a predetermined range of the light that is emitted forward from the second reflecting surface. Side, the second reflecting surface is reflected by the first reflecting surface, and the light that has reached the second reflecting surface is reflected forward, and the illumination lens is emitted forward of the light emitted by the light source, Light in a part of the range other than the range irradiated to the first reflection surface inside the range irradiated to the first reflection surface is refracted in the irradiation direction of the vehicle lamp.
[0009]
That is, in this vehicle lighting device, similarly to the above, by dividing the reflector into each reflector, the irradiation light from the light source is reflected forward by the reflector alone or the combination of the reflectors in each range, and from the light source. A part of the irradiation light is refracted forward by an irradiation lens provided with the reflector. As a result, the light emitted from the light source can be effectively used, so that the performance of illuminating the front can be improved.
[0010]
The invention according to claim 3 includes a light source, an irradiation lens, a main reflector, a sub reflector, a first reflector, a second reflector, a third reflector, and a fourth reflector, wherein the light source is A light emitting section is provided inside, and a base is further provided.The main reflector has a main reflecting surface formed of a part of a curved surface having a focus near the light emitting section in the light source, and the sub reflector has a focus near the light emitting section. The first reflector has a focal point in the vicinity of the light-emitting portion, and has a front second focal point between the sub-reflecting surface and the second reflecting surface. A second reflector having a focal point near a front second focal point between the first reflector and the first reflector, and a third reflector having a focal point near a light emitting unit. And a rear second focal point between the second reflecting surface and the fourth reflecting surface. A fourth reflecting surface having a focal point near a rear second focal point between the third reflecting surface and the third reflecting surface; Out of the range of light that is irradiated forward and illuminates the first reflective surface, and that is partially illuminated other than the range that is illuminated on the first reflective surface. The main reflection surface reflects forward light within a predetermined range of light illuminated rearward of the light emitted by the light-emitting portion in the light source, and the sub-reflection surface reflects light illuminated by the light-emitting portion. Among them, the light is irradiated rearward, reflects light in a part of the range outside the range irradiated to the main reflection surface forward, and the third reflection surface is irradiated rearward among the light irradiated by the light source, Outside the range illuminated on the main reflection surface, other than the range illuminated on the sub-reflector The area of the portion is reflected to the fourth reflecting surface side, the fourth reflecting surface is reflected by the third reflecting surface, the light reaching the fourth reflecting surface is reflected forward, and the first reflecting surface is irradiated by the light emitting unit. Of the light to be emitted, the light within a predetermined range of the light irradiated forward is reflected toward the second reflection surface, the second reflection surface is reflected by the first reflection surface, and the light that reaches the second reflection surface is reflected by the second reflection surface. The light source is reflected forward, and the light source is provided at an angle so that the light-emitting portion is located forward of the center of the base. The main reflector is behind the light source, and the light emitted from the light-emitting portion is directed forward by the main reflection surface. The sub-reflector is provided at an angle capable of reflecting the irradiation light from the light emitting section forward at the sub-reflection surface at a position in front of the main reflector and near the light source. The third reflector is located in front of the main reflector and behind the base of the light source. At a nearby position, the third reflector is inclined at an angle at which the irradiation light from the light emitting unit can be reflected by the third reflector toward the fourth reflector, and the fourth reflector is located outside the main reflector at the third reflector. The first reflector is provided at a position near the front of the base of the light source and directs the irradiation light from the light emitting unit to the second reflecting surface at the first reflecting surface at a position near the front of the base of the light source. The second reflector is provided at a position in front of the light source at an angle capable of reflecting light from the first reflection surface toward the front, and the illumination lens is provided in front of the light source. The first reflector is provided so as to surround the first reflector from the front to the side in an arc shape.
[0011]
In other words, in this vehicle lamp, similarly to the above, the light emitted from the light source is effectively used by the reflector and the irradiation lens divided for each range of the irradiation light from the light source, and at the same time, the vehicle lamp is moved to a predetermined position. It is contained in the dimensions. As a result, it is possible to provide a vehicular lamp in accordance with the design of the vehicle, and to obtain a novel appearance by using the illumination lens, and to further enhance the performance of illuminating the front.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the drawings. It should be noted that the present invention is not limited by the embodiment. In addition, constituent elements in the following embodiments include those that can be easily replaced by those skilled in the art and that can be easily assumed or substantially the same. The light source of the vehicular lamp includes a halogen lamp, an incandescent lamp, and a discharge lamp. The halogen lamp will be described as an embodiment.
[0013]
In the following description, the direction in which the vehicle lamp is illuminated will be referred to as the front, and the side where the connection terminal of the bulb is located will be referred to as the lower side. FIG. 1 is a sectional view showing a vehicular lamp according to an embodiment of the present invention. FIG. 2 is an AA arrow view of a main part of the vehicle lamp shown in FIG. 1. FIG. 3 is a BB arrow view of a main part of the vehicle lamp shown in FIG. 1. FIG. 4 is a diagram illustrating a reflection path of irradiation light of the vehicle lamp illustrated in FIG. 1. FIG. 5 is a perspective view of a main part of the vehicular lamp shown in FIG. In this embodiment, the light emitting portion 6 provided inside the light bulb 5 serving as a light source actually has a predetermined size, but for convenience, the light emitting portion 6 will be described as being formed in a dot shape. are doing. In the following description, only the configuration of each reflecting surface and the irradiation lens 23 for irradiating the front is described, and the method of fixing them is omitted. In the vehicle lamp 1 shown in FIG. 1, a lamp room 4 is defined by a lamp housing 2 and a lamp lens 3. A light bulb 5 is arranged in the lamp room 4 as a light source of the vehicular lamp 1. The light bulb 5 is fixed to a lower surface of the lamp housing 2 and is fixed in a state of being inclined forward. A filament that emits light when energized is provided inside the bulb 5 as a light emitting section 6.
[0014]
In the lamp room 4, a main reflector 11, a sub reflector 12, a first reflector 13, a second reflector 14, a third reflector 15, a fourth reflector 16, and an irradiation lens 23 are arranged. The main reflector 11 is provided behind the light bulb 5. When viewed from the front, the shape is a semicircular shape of only the upper half of the light emitting unit 6 in the light bulb 5. Also, when viewed from the side, the main reflector upper central portion 11a is forward of the main reflector lower central portion 11b, and when viewed from above, the main reflector lower end portion 11c is lower than the main reflector lower central portion 11b. Is formed in a curved surface so that the front side is forward. The sub-reflector 12 is located between the main reflector 11 and the light bulb 5 and is provided behind the light bulb 5. When viewed from the front, the sub-reflector outer portion 12a has a semicircular shape of only the upper half portion centered on the light emitting portion 6 in the light bulb 5, and the semi-circular shape is similar to the semi-circular shape. And a notch in the shape of the semi-circular sub-reflector inner portion 12d of only the upper half with the light-emitting portion 6 as the center. In addition, when viewed from the side, the sub-reflector outer central portion 12b is located forward of the sub-reflector inner central portion 12e, and when viewed from above, the sub-reflector outer central portion 12f is lower than the sub-reflector inner lower portion 12f. The lower part 12c is formed in a curved shape so that it is forward.
[0015]
The first reflector 13 is provided on the front side of the light bulb 5 and is provided near the base 8 of the light bulb 5. Its shape is formed of a quadrangular curved surface having four curved portions, the first reflector front central portion 13a is located above the first reflector rear central portion 13c, and the first reflector front end portion. The first reflector 13b is formed with a curved surface that is higher than the first reflector front central portion 13a, and the first reflector rear end portion 13d is higher than the first reflector rear central portion 13c. The second reflector 14 is provided on the front side of the light bulb 5 and is provided above the light emitting unit 6 in the light bulb 5 and near the light bulb 5. Its shape is formed of a quadrangular curved surface having a four-sided curved portion, the second reflector front central portion 14a is located above the second reflector rear central portion 14c, and the second reflector front central portion is formed. The second reflector 14a has a curved surface that is higher than the second reflector front end 14b, and the second reflector rear center 14c has a higher surface than the second reflector rear end 14d.
[0016]
The third reflector 15 is located between the main reflector 11 and the bulb 5 and is provided near the base 8 of the bulb 5. Its shape is formed of a quadrangular curved surface having a four-sided curved portion, the third reflector rear central portion 15c is higher than the third reflector front central portion 15a, and the third reflector front end portion. The third reflector 15b is formed with a curved surface that is higher than the third reflector front central portion 15a, and the third reflector rear end 15d is higher than the third reflector rear central portion 15c. The fourth reflector 16 is located above the main reflector 11, and the fourth reflector lower central part 16b is located near the main reflector upper central part 11a. When the fourth reflector 16 is viewed from the front or slightly below the front, the shape of the fourth reflector 16 is a semicircular shape with only the upper half centered on the vicinity of the upper central portion 11a of the main reflector. ing. Also, when viewed from the side, the fourth reflector upper central portion 16a is located forward of the fourth reflector lower central portion 16b, and when viewed from above, the fourth reflector lower central portion 16b is located below the fourth reflector lower central portion 16b. The end 16c is formed in a curved shape so that the end 16c is located forward.
[0017]
A main reflecting surface 17 is provided on a front surface of the main reflector 11, a sub-reflecting surface 18 is provided on a front surface of the sub-reflector 12, a first reflecting surface 19 is provided on a surface of the first reflector 13 on the light bulb 5 side, and The second reflecting surface 20 is provided on the front surface of the second reflector 14, the third reflecting surface 21 is provided on the upper surface of the third reflector 15, the fourth reflecting surface 22 is provided on the front surface of the fourth reflector 16, Each is provided. A point near the light emitting unit 6 is the focal point F1, a point near the front of the light emitting unit 6 is a front second focal point F2, and a point at a position shifted upward and behind the light emitting unit 6 is a front second point. The focus is F3. A virtual straight line passing through the focal point F1 in the front-back direction is defined as a center line 32.
[0018]
The main reflection surface 17 has a shape substantially coincident with a part of the paraboloid that is opened forward with the focal point F1 as the focal point and the center line 32 as the center line. As a result, of the light emitted from the light emitting unit 6, the main reflection surface 17 can forwardly reflect light in a range from the third intermediate irradiation light 28 to the fourth intermediate irradiation light 29. The sub-reflection surface 18 has a shape with the focal point F1 as the focal point and with the center line 32 as the center line, which substantially coincides with a part of the paraboloid opened forward. As a result, the sub-reflection surface 18 can reflect forward the light in the range from the second foremost irradiation light 25 to the third intermediate irradiation light 28 among the lights emitted from the light emitting unit 6.
[0019]
The first reflecting surface 19 has a shape substantially coincident with a curved surface obtained by rotating a part of an ellipse having two points of a focal point F1 and a front second focal point F2 about a center line 32. It has become. As a result, the first reflection surface 19 reflects light in the range from the second intermediate irradiation light 27 to the first rearmost irradiation light 30 of the light from the light emitting unit 6 to the second reflection surface 20 side. Can be. The second reflecting surface 20 has a shape that is substantially the same as a curved surface obtained by rotating a part of a parabola opened forward with the front second focal point F 2 around the center line 32. As a result, the second reflection surface 20 can reflect the light that has been reflected by the first reflection surface 19 and has reached the second reflection surface 20 after passing through the front second focal point F2. The third reflecting surface 21 has a shape substantially coincident with a curved surface obtained by rotating a part of an ellipse having two points of a focal point F1 and a rear second focal point F3 around a center line 32. Has become. As a result, the third reflection surface 21 reflects light in the range from the fourth intermediate irradiation light 29 to the second rearmost irradiation light 31 of the light from the light emitting unit 6 to the fourth reflection surface side 22. Can be. The fourth reflection surface 22 has a shape that is substantially the same as a curved surface obtained by rotating a part of the parabola opened forward with the rear second focal point F 3 around the center line 32. As a result, the fourth reflection surface 22 reflects the third reflection surface 21 and, after passing through the rear second focal point F3, can reflect the light reaching the fourth reflection surface 22 forward.
[0020]
The irradiation lens 23 is formed of a transparent material such as glass, and is provided in front of the electric bulb 5. When viewed from above, the irradiation lens 23 has a concentric shape centered on the vicinity of the rear central portion 13c of the first reflector, and has a semicircular shape only in a portion forward of the center, and is formed outside the irradiation lens. The part 23a and the irradiation lens inner part 23d are formed. The irradiation lens outer portion 23a and the irradiation lens inner portion 23d are formed by a curved surface in which the irradiation lens outer portion 23a is convex outward, and the irradiation lens inner portion 23d is formed by a curved surface convex inward. Have been. The irradiation lens outer portion 23a and the irradiation lens inner portion 23d having the curved surfaces are substantially parallel to each other near the irradiation lens upper surface 23g. Due to the curved surfaces of the portion 23a and the irradiation lens inner portion 23d, the width between the irradiation lens outer portion 23a and the irradiation lens inner portion 23d becomes smaller toward the lower side. That is, the width of the lower surface 23h of the irradiation lens is smaller than that of the upper surface 23g of the irradiation lens. Further, since the irradiation lens outer portion upper portion 23b is higher than the irradiation lens inner portion upper portion 23e, the irradiation lens upper surface 23g is inclined from the outside to the inside. In addition, since the irradiation lens outer portion lower part 23c and the irradiation lens inner part lower part 23f have substantially the same height in the vertical direction, the irradiation lens lower surface 23h is substantially parallel to the irradiation direction of the vehicle lamp 1. Has become the surface. Due to the shapes of the irradiation lens outer portion 23a and the irradiation lens inner portion 23d, the irradiation lens 23 emits light in the range from the first intermediate irradiation light 26 to the second intermediate irradiation light 27 out of the light from the light emitting section 6, It can be bent forward.
[0021]
An insertion hole 10 for the bulb 5 is provided in the lamp housing 2 in the vicinity of the first reflector rear central portion 13c and the third reflector front central portion 15a. The insertion hole 10 is provided with an inclination such that the front end 10a of the insertion hole is forward and lower than the rear end 10b of the insertion hole. By inserting and fixing the light bulb 5 into the insertion hole 10 from below, the light bulb 5 is inclined forward, and the light emitting unit 6 is further assembled so as to be at a predetermined position. Each reflector and the irradiation lens 23 of the vehicular lamp 1 are configured based on the light emitting unit 6 in the position in this state. In addition, a connector 33 is detachably connected to the connection terminal 9 of the light bulb 5 to supply electricity.
[0022]
Hereinafter, the operation of the vehicular lamp 1 will be described. When a lamp switch (not shown) is turned on while the connector 33 is connected to the connection terminal 9, the light emitting unit 6 in the bulb 5 emits light when energized. The light in the range from the third intermediate irradiation light 28 to the fourth intermediate irradiation light 29 out of the light emitted from the light emitting unit 6 by this light emission is reflected forward by the main reflection surface 17. At this time, the light traveling toward the main reflecting surface 17 is applied to the main reflecting surface 17 through the inside of the sub-reflector inner portion 12d of the sub-reflector 12 in front of the main reflector 11, and the sub-reflector inner portion 12d Has a semicircular shape. Further, the main reflection surface 17 is formed in a semicircular shape larger than the semicircular shape in which the sub-reflector inner portion 12d is formed. Further, since the distance from the light-emitting unit 6 is longer to the main reflection surface 17 than to the sub-reflector inner part 12d, light passing through the inner part of the semicircular sub-reflector inner part 12d is not reflected by the main reflector. The light is diffused before reaching the surface 17 and irradiates the entire semicircular main reflection surface 17. The light reflected by the main reflection surface 17 illuminates the front through the sub-reflector outer portion 12a.
[0023]
Of the light emitted from the light emitting unit 6, light in a range from the second front end irradiation light 25 to the third intermediate irradiation light 28 is reflected forward by the sub-reflection surface 18. Although the second reflector 14 is provided in front of the sub-reflecting surface 18, since the sub-reflecting surface 18 is located outside the second reflector 14, the light reflected by the sub-reflecting surface 18 Illuminate the front through the outside. Of the light emitted from the light emitting unit 6, light in a range from the second intermediate irradiation light 27 to the first rear end irradiation light 30 is reflected by the first reflection surface 19 toward the second reflection surface 20. The light reflected toward the second reflecting surface 20 reaches the second reflecting surface 20 after passing through the front second focal point F2, and is reflected forward by the second reflecting surface 20. Of the light emitted from the light emitting unit 6, light in the range from the fourth intermediate irradiation light 29 to the second rearmost irradiation light 31 is reflected by the third reflection surface 21 toward the fourth reflection surface 22. The light reflected toward the fourth reflection surface 22 reaches the fourth reflection surface 22 after passing through the rear second focal point F3, and is reflected forward by the fourth reflection surface 22. The light in the range from the first intermediate irradiation light 26 to the second intermediate irradiation light 27 out of the light emitted from the light emitting unit 6 is irradiated from substantially horizontal to downward. The light in this range is refracted by the curved surfaces of the irradiation lens outer portion 23a and the irradiation lens inner portion 23d of the irradiation lens 23, and irradiates the front.
[0024]
The above vehicle lamp 1 has the sub-reflector 12 provided near the bulb 5. Since the sub-reflector 12 near the light bulb 5 is close to the light-emitting unit 6, the light can be reflected before the irradiation light is diffused, so that the sub-reflection surface 18 can be made smaller and the sub-reflector 12 itself can be made smaller. The light reflected on the first reflecting surface 19 is reflected on the second reflecting surface 20, but the second reflecting surface 20 is close to the front second focal point F2. Since the light that has passed through the two focal points F2 can be reflected forward by the second reflection surface 20 before being diffused, the size of the second reflection surface 20 can be reduced, and the size of the second reflector 14 itself can be reduced. On the other hand, since the main reflector 11 is far from the light emitting unit 6, the diffused irradiation light is reflected by the main reflection surface 17, so that the main reflector 11 becomes large. The light reflected by the third reflecting surface 21 is reflected by the fourth reflecting surface 22. However, since the fourth reflecting surface 22 is far from the rear second focal point F3, the light is reflected by the third reflecting surface 21 and is reflected by the rear reflecting surface. Since the light that has passed through the two focal points F3 is diffused and then reflected forward on the fourth reflection surface 22, the fourth reflection surface 22 becomes large, and the fourth reflector 16 itself becomes large. The illumination lens 23 is provided such that the illumination lens upper surface 23g is lower than the second reflector 14 so as not to block the light reflected by the second reflection surface 20 forward.
[0025]
Therefore, the illumination lens 23 and each reflector become larger upward as they go rearward, so that the lamp lens 3 can be provided with the lamp lens inclined portion 3a. As a result, the vehicular lamp 1 can be integrated with the vehicle even if the vehicular lamp 1 is mounted on a vehicle or the like having a design with an inclined front portion. Further, since each reflector is formed only above the base 8 of the bulb 5, the whole vehicle lamp 1 can be made compact as compared with a conventional vehicle lamp. As a result, by using the vehicular lamp 1 as a vehicular headlamp, the degree of freedom in the design of the vehicle can be greatly increased, and the product power can be improved.
[0026]
In addition, the light-shielding paint portion 7 of the light bulb 5 which does not emit light from the light-emitting portion 6 is directed toward a portion where the size of the vehicle lamp 1 is to be reduced, that is, toward the lamp lens inclined portion 3a. For this purpose, the light bulb 5 is provided so as to be inclined with respect to the irradiation direction of the vehicular lamp 1. As a result, since the light-shielding paint portion 7 which does not emit the light emitted from the light bulb 5 is located at the portion where the dimensions of the reflector are to be suppressed, as described above, when the reflector is configured to become larger toward the rear. The arrangement of each reflector and the irradiation lens 23 and the irradiation range from the light bulb 5 are similar. Thereby, the irradiation light from the light bulb 5 can be efficiently used as light for illuminating the front, and the performance of illuminating the front of the vehicular lamp 1 is improved. In addition, the use of the semicircular illumination lens 23 enables a novel appearance to be obtained, thereby increasing the commercial value of the vehicular lamp 1 and, accordingly, the appearance of a vehicle to which the vehicular lamp 1 is mounted is also improved. Can be done.
[0027]
Since the above description describes the configuration of each reflecting surface and the irradiation lens 23 for irradiating the front, any method of fixing each reflector and the irradiation lens 23 is applicable. It may be used. Further, in the embodiment, the case where the electric bulb 5 is fixed to the lamp housing 2 and the optical axis is adjusted is described as a unit movable type that changes the direction of the entire vehicle lamp 1, but the electric bulb 5 is used as a reflector. When fixing and adjusting the optical axis, a reflector movable type having a structure for changing the direction of the reflector may be used. Further, each reflecting surface is formed from a parabolic curved surface or a part of a spheroidal curved surface, but these reflecting surfaces may be formed as free curved surfaces. By forming it with a free-form surface, the light emitted from the light bulb 5 can be more accurately reflected in any direction, and an ideal light distribution pattern can be obtained. In addition, when the vehicular lamp 1 is used as a headlamp for passing, the light distribution pattern is configured with each reflection surface for passing, and when used as a headlamp for traveling, the light distribution pattern is used. By configuring each reflection surface for the pattern at the time of traveling, the vehicle lamp 1 having a necessary light distribution pattern can be obtained. Further, in the embodiment, the light bulb 5 having one light emitting unit 6 is used, but the light bulb 5 having two light emitting units is used as the light emitting unit for passing and for traveling. May be used. A lamp switch is provided by using the vehicular lamp 1 by using a light bulb 5 having two light-emitting portions therein and forming the shape of each reflecting surface in accordance with the two light-emitting portions provided inside the light bulb 5. By simply switching the irradiation light, the irradiation light for the passing time and the irradiation light for the running time can be used as needed.
[0028]
Further, in the embodiment, the connection terminal 9 direction of the light bulb 5 is set to the lower side, but the connection terminal 9 direction may be used in a horizontal direction or any other direction. When used in the lateral direction, the vehicle lamp 1 can be adapted to a vehicle having a design in which the front side is narrowed down. The degree of freedom in vehicle design can be improved. In any case, the appearance of the vehicle can be dramatically improved by the irradiation lens 23 used in the vehicular lamp 1. Further, in the embodiment, the halogen bulb has been described, but the bulb may be an incandescent bulb or a discharge lamp other than the halogen bulb. Further, the present invention is not limited to the vehicle headlamp, and its application is not limited as long as it is a lamp that uses a light bulb and a reflector to irradiate light in one direction.
[0029]
【The invention's effect】
As is apparent from the above description, according to the vehicle lamp according to the present invention (claim 1), the reflector is divided into the reflectors, and further, by using the irradiation lens, the vehicle lamp according to the vehicle design can be obtained. can do.
[0030]
Further, according to the vehicular lamp according to the present invention (claim 2), the reflector is divided into the respective reflectors, and furthermore, the illumination light from the bulb can be used effectively by using the illumination lens together, so that the front is illuminated. Performance can be enhanced.
[0031]
Further, according to the vehicle lamp according to the present invention (claim 3), the reflector can be divided for each range of the irradiation light from the bulb, and further, by using the irradiation lens, the performance of illuminating the front can be improved. At the same time, a novel appearance can be obtained by using the irradiation lens.
[Brief description of the drawings]
FIG. 1 is a partial sectional view showing an embodiment of a vehicular lamp according to the present invention.
FIG. 2 is an AA arrow view of a main part of FIG. 1;
FIG. 3 is a BB view of a main part of FIG. 1;
FIG. 4 is a diagram illustrating a reflection path of irradiation light according to the embodiment.
FIG. 5 is a perspective view of a main part of the embodiment.
[Explanation of symbols]
1 Vehicle lighting fixtures
5 light bulbs
6 Light emitting unit
8 base
10 insertion hole
11 Main reflector
12 Sub reflector
13 1st reflector
14 2nd reflector
15 Third reflector
16 4th reflector
17 Main reflective surface
18 Sub reflective surface
19 1st reflective surface
20 Second reflective surface
21 Third reflective surface
22 Fourth reflective surface
23 Irradiation lens
24 First Front End Irradiation Light
25 Second front-end irradiation light
26 1st intermediate irradiation light
27 Second intermediate irradiation light
28 Third intermediate irradiation light
29 4th intermediate irradiation light
30 1st rearmost irradiation light
31 2nd rearmost irradiation light
32 center line
F1 Focus
F2 Front second focus
F3 Rear 2nd focus

Claims

A light source, an illumination lens, a main reflector, a sub reflector, a first reflector, a second reflector, a third reflector, and a fourth reflector,
The light source has a light-emitting portion inside, and further, a base is provided,
Each of the reflectors has a reflective surface,
The light source is provided with a slope forward from the side or up and down direction,
The main reflector is provided behind the light source, with the light source and the reflection surface facing forward,
A sub-reflector is provided in front of the main reflector and near the light source, with the reflecting surface facing the front and the light source,
In front of the main reflector and near the rear of the base of the light source, a third reflector is provided with the reflection surface facing the light source and the fourth reflector,
A fourth reflector is provided outside the main reflector, with the third reflector and the reflection surface facing forward,
A first reflector is provided in front of the light source and near a base of the light source, with a reflecting surface facing the light source and the second reflector,
Further, a second reflector is provided in front of the light source, with the reflecting surface facing the first reflector and forward,
A lighting device for a vehicle, wherein the illumination lens is provided so as to surround the front of the light source from the front to the side of the first reflector.

A light source, an illumination lens, a main reflector, a sub reflector, a first reflector, a second reflector, a third reflector, and a fourth reflector,
The light source has a light emitting section inside,
The main reflector has a main reflecting surface, the sub-reflector has a sub-reflecting surface, the first reflector has a first reflecting surface, the second reflector has a second reflecting surface, and the third reflector has a third reflecting surface. A fourth reflector having a reflective surface, the fourth reflector having a fourth reflective surface,
The main reflection surface reflects light in a predetermined range of light irradiated rearward, of light emitted by the light emitting unit in the light source,
The sub-reflection surface is irradiated rearward, of the light emitted by the light emitting unit, and reflects forward a portion of the light outside the range irradiated to the main reflection surface,
The third reflecting surface is illuminated rearward of the light emitted by the light source, and covers a part of the range outside the range illuminated on the main reflecting surface other than the range illuminated on the sub-reflector, with a fourth reflecting surface. Reflected to the side,
The fourth reflecting surface is reflected by the third reflecting surface, and reflects the light reaching the fourth reflecting surface forward,
The first reflecting surface reflects light in a predetermined range of light irradiated forward in the light emitted by the light emitting unit toward the second reflecting surface,
The second reflecting surface reflects on the first reflecting surface, reflects light reaching the second reflecting surface forward,
The irradiation lens irradiates light in a part of a range other than a range irradiated to the first reflection surface, inside a range irradiated to the first reflection surface, among light irradiated by the light source. A vehicular lamp characterized by being refracted in an irradiation direction of the vehicular lamp.

A light source, an illumination lens, a main reflector, a sub reflector, a first reflector, a second reflector, a third reflector, and a fourth reflector,
The light source has a light-emitting portion inside, and further, a base is provided,
The main reflector has a main reflecting surface composed of a part of a curved surface having a focal point near a light emitting portion in the light source,
The sub-reflector has a sub-reflection surface composed of a part of a curved surface having a focal point near the light emitting portion,
The first reflector has a focal point near the light emitting portion, and has a first reflecting surface formed of a part of a curved surface having a front second focal point between the first reflecting surface and the second reflecting surface,
A second reflector having a second reflective surface having a focal point near a front second focal point between the first reflector and the second reflective surface;
The third reflector has a focal point in the vicinity of the light emitting unit, and has a third reflecting surface formed of a part of a curved surface having a rear second focal point between the third reflector and the fourth reflecting surface,
The fourth reflector has a fourth reflecting surface having a focal point near a rear second focal point between the fourth reflecting surface and the third reflecting surface,
The irradiation lens irradiates light in a part of a range other than a range irradiated to the first reflection surface, inside a range irradiated to the first reflection surface, among light irradiated by the light source. It is refracted toward the irradiation direction of the vehicle lamp,
The main reflection surface reflects light in a predetermined range of light irradiated rearward, of light emitted by the light emitting unit in the light source,
The sub-reflection surface is irradiated rearward, of the light emitted by the light emitting unit, and reflects forward a portion of the light outside the range irradiated to the main reflection surface,
The third reflecting surface is illuminated rearward of the light emitted by the light source, and covers a part of the range outside the range illuminated on the main reflecting surface other than the range illuminated on the sub-reflector, with a fourth reflecting surface. Reflected to the side,
The fourth reflecting surface is reflected by the third reflecting surface, and reflects the light reaching the fourth reflecting surface forward,
The first reflecting surface reflects light in a predetermined range of light irradiated forward in the light emitted by the light emitting unit toward the second reflecting surface,
The second reflecting surface reflects on the first reflecting surface, reflects light reaching the second reflecting surface forward,
The light source is provided so as to be inclined so that the light emitting part is ahead of the center of the base,
The main reflector is provided behind the light source at an angle at which the irradiation light from the light emitting unit can be reflected forward by the main reflection surface,
The sub-reflector is provided in front of the main reflector, and at a position near the light source, at an angle capable of reflecting the irradiation light from the light emitting unit forward on the sub-reflection surface,
The third reflector is provided at a position in front of the main reflector and at a position near the back of the base of the light source, at an angle at which the irradiation light from the light emitting unit can be reflected by the third reflection surface toward the fourth reflection surface. ,
The fourth reflector is provided at a position outside the main reflector at an angle capable of reflecting light from the third reflecting surface toward the front,
The first reflector is provided at a position near the front of the base of the light source, and is inclined at an angle at which the irradiation light from the light emitting unit can be reflected by the first reflection surface toward the second reflection surface,
The second reflector is provided at a position in front of the light source and inclined at an angle capable of reflecting light from the first reflection surface toward the front,
A lighting device for a vehicle, wherein the illumination lens is provided in front of the light source so as to surround in an arc shape from the front to the side of the first reflector.