【特許請求の範囲】
【請求項１】 反射鏡と、反射鏡の第一焦点近傍に配置された光源と、反射鏡の第二焦点近傍に配置された遮光部材と、遮光部材の近傍に焦点を有する投影レンズを備え、前記遮光部材の可動により配光特性形状の切換えを行う車両用灯具において、
前記配光特性形状の切換は、遮光部材の回動を行う回転軸を有する回転式駆動部により行うものであり、前記回転式駆動部には、配光位置を与えるストッパーが設けられ、
前記回転軸には、前記遮光部材が直接的に駆動可能に設けられ、且つ、前記駆動部が非通電状態とされたときに２つの配光位置の内の何れか一方の位置に復帰させるリターンスプリングが設けられていることを特徴とする車両用前照灯。
【請求項２】 前記回転式駆動部は、前記回転軸を同芯とした外軸と内軸との二重とし、弾性を有する連結部材で接続され、
前記外軸と内軸の一方の軸に前記ストッパーが設けられ、他方の軸に前記遮光部材が設けてあることを特徴とする請求項１に記載の車両用前照灯。
[Claims]
1. A reflecting mirror, a light source arranged in the vicinity of the first focal point of the reflecting mirror, a light-shielding member arranged in the vicinity of the second focal point of the reflecting mirror, and a projection lens having a focus in the vicinity of the light-shielding member. In a vehicle lighting device that switches the light distribution characteristic shape by moving the light-shielding member.
The switching of the light distribution characteristic shape is performed by a rotary drive unit having a rotation shaft that rotates the light-shielding member, and the rotary drive unit is provided with a stopper that gives a light distribution position.
The rotating shaft is provided with the light-shielding member so as to be directly driveable, and returns to one of the two light distribution positions when the driving unit is de-energized. Vehicle headlights characterized by the provision of springs.
2. The rotary drive unit is made of a double outer shaft and an inner shaft having the rotary shaft as a concentric core, and is connected by an elastic connecting member.
The vehicle headlight according to claim 1, wherein the stopper is provided on one of the outer shaft and the inner shaft, and the light-shielding member is provided on the other shaft.
【０００１】
【発明の属する技術分野】
本発明は車両用の前照灯に関するものであり、詳細には、１つの光源ですれ違い配光と走行配光、或いは、直進時配光と旋回時配光など２つの配光特性の形状が得られるように可動とした遮光部材が設けられ、この遮光部材をの可動するためのが部が設けられ、この可動部の駆動のための回転式駆動部が設けられてなる車両用前照灯の構成に係る。
[0001]
[Technical field to which the invention belongs]
The present invention relates to a headlight for a vehicle, and more specifically, the shape of two light distribution characteristics such as passing light distribution and traveling light distribution, or straight-ahead light distribution and turning light distribution is provided by one light source. A vehicle headlight that is provided with a movable light-shielding member so as to be obtained, a part for moving the light-shielding member, and a rotary drive part for driving the movable part. It relates to the composition of.
【０００８】
【課題を解決するための手段】
本発明は前記した従来の課題を解決するための具体的手段として、反射鏡と、反射鏡の第一焦点近傍に配置された光源と、反射鏡の第二焦点近傍に配置された遮光部材と、遮光部材の近傍に焦点を有する投影レンズを備え、前記遮光部材の可動により配光特性形状の切換えを行う車両用灯具において、前記配光特性形状の切換は、遮光部材の回動を回動軸を有する行う回転式駆動軸により行うものであり、前記回転式駆動部には、配光位置を与えるストッパーが設けられ、前記回転軸には、前記遮光部材が直接的に駆動可能に設けられ、且つ、前記駆動部が非通電状態とされたときに２つの配光位置の内の何れか一方の位置に復帰させるリターンスプリングが設けられていることを特徴とする車両用前照灯を提供することで課題を解決するものである。
0008
[Means for solving problems]
The present invention includes a reflector, a light source arranged near the first focal point of the reflector, and a light-shielding member arranged near the second focal point of the reflector as specific means for solving the above-mentioned conventional problems. In a vehicle lamp equipped with a projection lens having a focus in the vicinity of the light-shielding member and switching the light distribution characteristic shape by moving the light-shielding member, the switching of the light distribution characteristic shape rotates the rotation of the light-shielding member. It is carried out by a rotary drive shaft having a shaft, the rotary drive unit is provided with a stopper for giving a light distribution position, and the rotary shaft is provided with the light-shielding member so as to be directly driveable. Provided is a vehicle headlight characterized in that a return spring is provided to return the drive unit to one of the two light distribution positions when the drive unit is de-energized. By doing so, the problem is solved.