JP2011119184A5

JP2011119184A5 -

Info

Publication number: JP2011119184A5
Application number: JP2009277665A
Authority: JP
Filing date: 2009-12-07
Publication date: 2013-01-10
Anticipated expiration: 2029-12-07

Description

上記課題を解決するために、本発明の請求項１に記載された発明は、第一焦点の位置を共に共有して連設された夫々回転楕円面又はそれに類する回転自由曲面からなる２つの回転楕円系曲面を、前記一方の回転楕円系曲面の長軸を含む平面で上下に分割したときの略上側に位置する前記一方の回転楕円系曲面に形成された主反射面ともう一方の回転楕円系曲面に形成された副反射面からなると共に前記主反射面の前端側に前記副反射面の後端側が位置する複合楕円系反射面と、前記第一焦点の近傍に位置しその発光軸を上方に向けた光源と、前記長軸を光軸とし前記光軸上の前記主反射面の第二焦点と同一位置に後側焦点が位置する投影レンズと、前記光源と前記投影レンズとの間に位置する反射手段と、を備えた車両用前照灯であって、前記反射手段が前記光軸近傍で且つ該光軸に沿った位置にあるときは、前記反射手段前端縁が前記投影レンズの後側焦点近傍に位置し、前記光源から発せられて前記主反射面で反射された光が前記後側焦点を通って前記投影レンズを介して外部に照射され、前記反射手段が前記光軸に対して所定の角度をもって前方に向けて下方に傾斜した位置にあるときは、前記反射手段の下方に位置する、前記副反射面の第二焦点が前記後側焦点に対して前記反射手段を対称面とする面対称の位置にあり、前記光源から発せられて前記主反射面で反射された光が前記後側焦点を通って前記投影レンズを介して外部に照射されると共に、前記副反射面で反射された一次反射光が前記反射手段で再度反射されてその二次反射光が前記後側焦点を通って前記投影レンズを介して外部に照射される、ことを特徴とするものである。 In order to solve the above-mentioned problems, the invention described in claim 1 of the present invention is characterized in that two rotations each composed of a spheroidal surface or a similar rotational free-form surface, which are connected in common while sharing the position of the first focal point. The main reflecting surface formed on the one spheroid surface and the other spheroid formed on the one spheroid surface that is positioned substantially above when the ellipsoidal surface is divided into upper and lower planes including the major axis of the one spheroid surface A complex ellipsoidal reflecting surface comprising a sub-reflecting surface formed on a system curved surface and having a rear end side of the sub-reflecting surface positioned on the front end side of the main reflecting surface, and a light emission axis thereof located in the vicinity of the first focal point a light source for the above direction, and a projection lens rear focal point is located at the second focus of the same position of the main reflecting surface on the optical axis to the major axis and the optical axis, and the light source and the projection lens a vehicle headlamp equipped with a reflecting means located between the front When the reflecting means is in a position and along the optical axis in the vicinity of the optical axis is located in the vicinity of the rear focal point of the reflecting means the front edge said projection lens, said main reflecting surface at being emitted from said light source When the reflected light is irradiated to the outside through the projection lens through the rear focal point, and the reflecting means is at a position inclined downward toward the front with a predetermined angle with respect to the optical axis. , located below said reflecting means, said there the second focus of the sub-reflecting surface is the reflecting means with respect to the rear focal point at the position of the plane of symmetry of the plane of symmetry, said main reflector is emitted from the light source The light reflected by the surface passes through the rear focal point and is radiated to the outside through the projection lens, and the primary reflected light reflected by the sub-reflecting surface is reflected again by the reflecting means and its secondary. Reflected light passes through the rear focal point and the projection level. Is irradiated to the outside through the figure, it is characterized in.

また、本発明の請求項２に記載された発明は、第一焦点の位置を共に共有して連設された夫々回転楕円面又はそれに類する回転自由曲面からなる２つの回転楕円系曲面を、前記一方の回転楕円系曲面の長軸を含む平面で上下に分割したときの略上側に位置する前記一方の回転楕円系曲面に形成された主反射面ともう一方の回転楕円系曲面に形成された副反射面からなると共に前記主反射面の前端部に前記副反射面の後端部が連接されてなる複合楕円系反射面と、前記第一焦点の近傍に位置しその発光軸を上方且つ前方に向けた光源と、前記長軸を光軸とし前記光軸上の前記主反射面の第二焦点と同一位置に後側焦点が位置する投影レンズと、前記光源と前記投影レンズとの間に位置し、上面を平面反射面とし後端縁側に回動支持部を有し該回動支持部を支点に前端縁側が上下に回動する可動ミラーと、を備えた車両用前照灯であって、前記可動ミラーの平面反射面が前記光軸近傍で且つ該光軸に沿った位置にあるときは、前記可動ミラーの前端縁が前記投影レンズの後側焦点近傍に位置し、前記光源から発せられて前記主反射面で反射された光が前記後側焦点を通って前記投影レンズを介して外部に照射され、前記可動ミラーの反射面が前記光軸に対して所定の角度をもって前方に向けて下方に傾斜した位置にあるときは、前記反射面の下方に位置する、前記副反射面の第二焦点が前記後側焦点に対して前記平面反射面を対称面とする面対称の位置にあり、前記光源から発せられて前記主反射面で反射された光が前記後側焦点を通って前記投影レンズを介して外部に照射されると共に、前記副反射面で反射された一次反射光が前記平面反射面で再度反射されてその二次反射光が前記後側焦点を通って前記投影レンズを介して外部に照射される、ことを特徴とするものである。
また、本発明の請求項３に記載された発明は、請求項１又は２の何れかにおいて、前記光源が前記主反射面を見込む立体角は前記副反射面を見込む立体角よりも大きいことを特徴とするものである。 The invention described in claim 2 of the present invention is characterized in that two spheroid curved surfaces each consisting of a spheroid or a rotation free-form surface similar to each other, which are arranged in common sharing the position of the first focal point, Formed on the main reflection surface formed on the one spheroid curved surface and the other spheroid curved surface located substantially on the upper side when divided vertically in a plane including the major axis of one spheroid curved surface A composite elliptical reflecting surface comprising a sub-reflecting surface and having the rear end portion of the sub-reflecting surface connected to the front end portion of the main reflecting surface; and a light emitting axis above and in front of the first focal point. Between the light source and the projection lens, and a projection lens in which the long axis is the optical axis and the rear focal point is located at the same position as the second focal point of the main reflection surface on the optical axis. Located on the rear edge side with the upper surface as a flat reflective surface and And a movable mirror whose front edge side pivots up and down with the support portion as a fulcrum, wherein the plane reflecting surface of the movable mirror is in the vicinity of the optical axis and along the optical axis. The front end edge of the movable mirror is located in the vicinity of the rear focal point of the projection lens, and the light emitted from the light source and reflected by the main reflecting surface passes through the rear focal point to the projection lens. When the reflecting surface of the movable mirror is in a position inclined downward with a predetermined angle with respect to the optical axis, the auxiliary mirror is positioned below the reflecting surface. The second focal point of the reflecting surface is in a plane-symmetrical position with the planar reflecting surface as a symmetric surface with respect to the rear focal point, and the light emitted from the light source and reflected by the main reflecting surface is the rear focal point. Through the projection lens and The primary reflected light reflected by the sub-reflecting surface is reflected again by the planar reflecting surface, and the secondary reflected light is irradiated to the outside through the projection lens through the rear focal point. It is what.
Further, in the invention described in claim 3 of the present invention, in any one of claims 1 and 2, the solid angle at which the light source looks at the main reflection surface is larger than the solid angle at which the sub reflection surface is expected. It is a feature.

Claims

Two spheroidal curved surfaces, each consisting of a spheroidal surface or a similar free-rotating curved surface that share the position of the first focal point, are moved up and down on a plane that includes the major axis of the one spheroidal curved surface. It consists of a main reflection surface formed on the one spheroid curved surface located substantially on the upper side when divided and a sub-reflection surface formed on the other spheroid curved surface and on the front end side of the main reflection surface a composite elliptic reflecting surface rear end of the sub-reflecting surface is positioned, a light source for the upward direction and the light-emitting axis located in the vicinity of the first focal point, the major axis and the optical axis on the optical axis A vehicular headlamp comprising: a projection lens having a rear focal point located at the same position as the second focal point of the main reflecting surface; and a reflecting means positioned between the light source and the projection lens,
When the reflecting means is in the vicinity of the optical axis and along the optical axis, the front edge of the reflecting means is located in the vicinity of the rear focal point of the projection lens, and is emitted from the light source and is the main reflecting surface. The light reflected by the light passes through the rear focal point and is irradiated to the outside through the projection lens.
When the reflecting means is at a position inclined forward and at a predetermined angle with respect to the optical axis, the second focal point of the sub-reflecting surface located below the reflecting means is the rear focal point. wherein there reflecting means at a position of plane symmetry to the plane of symmetry, irradiated to the outside through the projection lens light reflected by the main reflection surface is emitted from the light source through the rear side focal point with respect to And the primary reflected light reflected by the sub-reflecting surface is reflected again by the reflecting means , and the secondary reflected light is irradiated to the outside through the projection lens through the rear focal point. A vehicle headlamp characterized by this.

Two spheroidal curved surfaces, each consisting of a spheroidal surface or a similar free-rotating curved surface that share the position of the first focal point, are moved up and down on a plane that includes the major axis of the one spheroidal curved surface. The main reflecting surface formed on the one spheroid curved surface located substantially above when divided and the sub-reflecting surface formed on the other spheroid curved surface and at the front end of the main reflecting surface A composite elliptical reflecting surface formed by connecting rear end portions of the sub-reflecting surface, a light source located near the first focal point and having its emission axis directed upward and forward, and the light having the major axis as the optical axis. A projection lens whose rear focal point is located at the same position as the second focal point of the main reflecting surface on the axis, and is positioned between the light source and the projection lens, and the upper surface is a plane reflecting surface and is rotated to the rear edge side. It has a support part, and the front end edge side can be turned up and down with the turning support part as a fulcrum. A mirror, a vehicle headlamp equipped with,
When the plane reflecting surface of the movable mirror is in the vicinity of the optical axis and along the optical axis, the front edge of the movable mirror is positioned in the vicinity of the rear focal point of the projection lens and is emitted from the light source. The light reflected by the main reflecting surface is irradiated to the outside through the projection lens through the rear focal point,
When the reflecting surface of the movable mirror is at a position inclined downward with a predetermined angle with respect to the optical axis, the second focal point of the sub-reflecting surface located below the reflecting surface is The light emitted from the light source and reflected by the main reflection surface is located through the projection lens through the projection lens, in a plane-symmetric position with the plane reflection surface as a symmetry surface with respect to the rear focus. The primary reflected light reflected by the sub-reflecting surface is reflected again by the planar reflecting surface, and the secondary reflected light passes through the rear focal point to the outside through the projection lens. A vehicle headlamp characterized by being irradiated.

It said light source is a vehicle headlamp according to claim 1 or 2 solid angle looking into the main reflection surface being greater than the solid angle to expect the secondary reflecting surface.