JPH0212641Y2

JPH0212641Y2 -

Info

Publication number: JPH0212641Y2
Application number: JP19909886U
Authority: JP
Priority date: 1986-12-26
Filing date: 1986-12-26
Publication date: 1990-04-10
Also published as: JPS63106004U

Description

【考案の詳細な説明】（産業上の利用分野）この考案は、複合反射面を備えたヘツドランプ
に関するものである。[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a headlamp with a composite reflective surface.

（従来の技術）スラントノーズタイプの自動車に適用するヘツ
ドランプは、第４図に示すように角形で平べつた
い形状となり、なるべく光線の利用率を高めるた
めに、この反射鏡ａは単なる放物面反射鏡ではな
く、横断面が凹面状で反射鏡の放物面に沿つて縦
方向に延びる反射面ｂが横方向に並設された複合
反射面となし、反射光ｃを極力左右方向に拡げて
照度アツプを図つている。(Prior Art) The headlamp applied to a slant-nose type automobile has a rectangular and flat shape as shown in Fig. 4, and in order to increase the utilization of the light beam as much as possible, this reflector a is simply a paraboloid. Rather than a reflecting mirror, it is a composite reflecting surface in which reflecting surfaces b, each of which has a concave cross section and extends vertically along the paraboloid of the reflecting mirror, are arranged in parallel in the horizontal direction, and the reflected light c is spread horizontally as much as possible. We are trying to increase the illuminance.

（考案が解決決しようとする問題点）しかしながら、上記した従来のヘツドランプに
よると、前面レンズｄのスラント角θが大きい
と、レンズの下端の奥行寸法Ｌが非常に大きくな
り、前記反射鏡ａの下部で反射されたバルブｅの
光線ｆがレンズの側壁d′に阻害されて外部に照射
されず、照度アツプの目的に反することになる。(Problems to be Solved by the Invention) However, according to the above-mentioned conventional headlamp, if the slant angle θ of the front lens d is large, the depth L of the lower end of the lens becomes very large. The light ray f from the bulb e reflected at the lower part is blocked by the side wall d' of the lens and is not irradiated to the outside, which is contrary to the purpose of increasing illuminance.

本考案は、反射光線がレンズの側壁で阻害され
ないようにしたスラントタイプのヘツドランプを
提供することにより、従来の問題点を解決しよう
とするものである。 The present invention attempts to solve the problems of the prior art by providing a slant type headlamp in which the reflected light beam is not obstructed by the side walls of the lens.

（問題点を解決するための手段）このような問題点を解決するための手段とし
て、この考案は、横断面が凹面状で反射鏡の放物
面に沿つて縦方向に延びる反射面が横方向に並設
されると共に、この反射鏡の前面にスラント角の
大きなレンズが取付けられたヘツドランプにおい
て、前記反射鏡は、光軸を含む水平面を境として
前記反射面がそれぞれ別個に形成され、その上半
部の中央の反射面は広幅に形成され、下半部の反
射面は狭幅に形成されたことを構成上の特徴とす
るものである。即ち、反射鏡の上半部では反射光
線をなるべく左右に拡げてレンズの側壁の浅い上
部から照射し、反射鏡の下半部では反射光線の拡
開を抑えてレンズの前面から照射されるように
し、これにより照度アツプを達成できるようにし
たものである。(Means for solving the problem) As a means to solve the above problem, this invention has a concave cross section and a horizontal reflecting surface extending vertically along the paraboloid of the reflecting mirror. In a headlamp in which a lens with a large slant angle is attached to the front surface of the reflecting mirror and the reflecting mirror is arranged in parallel in the direction of The structure is characterized in that the reflective surface in the center of the upper half is formed wide, and the reflective surface in the lower half is formed narrow. In other words, the upper half of the reflector spreads the reflected light to the left and right as much as possible and irradiates it from the shallow top of the side wall of the lens, while the lower half of the reflector suppresses the spread of the reflected light and irradiates it from the front of the lens. This makes it possible to increase illuminance.

（実施例）以下、図示の実施例によりこの考案を具体的に
説明する。(Example) This invention will be specifically explained below with reference to the illustrated example.

図中、１は反射鏡であり、この反射鏡に取付け
られたバルブ２の光軸Ｃを含む水平面Ｈを境とし
て、その上半部と下半部に複合反射面１ａ，１ｂ
がそれぞれ形成されている。これらの複合反射面
１ａ，１ｂは、従来と同様に横断面が放物面等の
凹面状で反射鏡の放物面に沿つて縦方向に延びた
溝状反射面が横方向に並設されてなり、上半部の
複合反射面１ａのうち中央部の反射面Ｐ，Ｑは他
のものより広幅（30mm以上）に形成され、下半部
の複合反射面１ｂは上半部のものよりも狭幅（25
mm以下）に形成されている。３は反射鏡１の前面
に取付けられたレンズであり、そのスラント角α
は45°以上に設定されている。 In the figure, reference numeral 1 is a reflecting mirror, and the upper and lower halves of the horizontal plane H including the optical axis C of the bulb 2 attached to the reflecting mirror are composite reflecting surfaces 1a and 1b.
are formed respectively. These composite reflective surfaces 1a and 1b have a concave cross section such as a paraboloid as in the past, and groove-shaped reflective surfaces extending vertically along the paraboloid of the reflecting mirror are arranged in parallel in the horizontal direction. Therefore, among the composite reflective surfaces 1a in the upper half, the central reflective surfaces P and Q are formed wider than the others (30 mm or more), and the composite reflective surface 1b in the lower half is wider than the other composite reflective surfaces 1b. Narrow width (25
mm). 3 is a lens attached to the front of the reflecting mirror 1, and its slant angle α
is set at 45° or more.

上記のように構成された本考案に係るヘツドラ
ンプは、前記上半部１ａで反射された光線R₁，
R₂は、前記光軸Ｃに対して開き角度βが左右に
30゜程度であつて前記レンズ３の前面から照射さ
れ、一方下半部１ｂで反射された光線R₃，R₄は、
開き角度τが左右に15゜程度であり、前記レンズ
３の側壁３′にぶつからないでレンズの前面から
照射される。従つて、バルブ２からの光線を有効
に利用し、ヘツドランプの照度を著しく向上させ
ることができる。 In the headlamp according to the present invention configured as described above, the light rays R ₁ reflected by the upper half portion 1a,
R ₂ is the opening angle β left and right with respect to the optical axis C.
The light rays R ₃ and R ₄ that are irradiated from the front surface of the lens 3 and reflected at the lower half 1b at an angle of about 30° are:
The opening angle τ is about 15 degrees in the left and right directions, and the light is irradiated from the front surface of the lens 3 without hitting the side wall 3' of the lens 3. Therefore, the light rays from the bulb 2 can be used effectively, and the illuminance of the headlamp can be significantly improved.

（考案の効果）以上説明したように、この考案によれば、スラ
ントタイプのヘツドランプにおいて、この反射鏡
をバルブの光軸を境として上下に分け、上半部の
複合反射面の中央部は広幅に形成し、下半部の複
合反射面は狭幅に形成し、上半部からの反射光線
は広角に照射し、下半部からの反射光線は狭角に
抑えて前面レンズの側壁に衝突しないようにした
ので、スラント角の大きな前面レンズであつて
も、従来のものに比べると光線利用率を著しく向
上させ、照度アツプを図れる等のすぐれた効果を
奏する。(Effects of the invention) As explained above, according to this invention, in a slant type headlamp, the reflecting mirror is divided into upper and lower parts with the optical axis of the bulb as the border, and the central part of the composite reflecting surface in the upper half is wide. The composite reflective surface in the lower half is formed narrowly, and the reflected light from the upper half is irradiated at a wide angle, while the reflected light from the lower half is suppressed to a narrow angle and collides with the side wall of the front lens. Therefore, even if the front lens has a large slant angle, it can significantly improve the light utilization efficiency and increase the illumination intensity compared to conventional lenses.

[Brief explanation of drawings]

第１図は、この考案の一実施例を示す要部の横
断面図、第２図は、そのレンズを省略した正面
図、第３図は、同じく要部の縦断面図、第４図
は、従来例を示すもので、イは要部の横断面図、
ロはそのレンズを省略した正面図、ハは同じく要
部の縦断面図である。１……反射鏡、１ａ……上半部の複合反射面、
１ｂ……下半部の複合反射面、２……光源、３…
…前面レンズ。 Fig. 1 is a cross-sectional view of the main part showing an embodiment of this invention, Fig. 2 is a front view with the lens omitted, Fig. 3 is a longitudinal sectional view of the main part, and Fig. 4 is a cross-sectional view of the main part. , shows a conventional example, A is a cross-sectional view of the main part,
B is a front view with the lens omitted, and C is a vertical cross-sectional view of the main parts. 1... Reflector, 1a... Composite reflective surface in the upper half,
1b...Composite reflective surface in the lower half, 2...Light source, 3...
...Front lens.

Claims

[Scope of utility model registration request]

Reflecting surfaces having a concave cross section and extending vertically along the paraboloid of the reflecting mirror are arranged in parallel in the horizontal direction, and
In a headlamp in which a lens with a large slant angle is attached to the front surface of the reflecting mirror, the reflecting mirror has the reflecting surfaces formed separately with a horizontal plane containing the optical axis as the boundary, and the reflecting surface in the center of the upper half of the reflecting mirror. A headlamp with a composite reflective surface characterized by a wide reflective surface and a narrow reflective surface in the lower half.