JPH0443804U

JPH0443804U -

Info

Publication number: JPH0443804U
Application number: JP8061990U
Authority: JP
Priority date: 1990-05-23
Filing date: 1990-07-31
Publication date: 1992-04-14
Anticipated expiration: 2005-07-31
Also published as: JPH0810912Y2

Description

[Brief explanation of the drawing]

第１図は本考案に係る自動車用前照灯の一実施
例を示し、第１図Ａは前面レンズを取り外して描
いた正面図、第１図ＢはそのＢ−Ｂ断面図、第１
図Ｃは同じくＣ−Ｃ断面図である。第２図Ａは上
記実施例の正面図、第２図Ｂは同じくステツププ
リズムの断面図、第２図Ｃは同じく素通しレンズ
の断面図である。第３図は上記実施例の配光パタ
ーンを示す平面図であつて、第３図Ａは前面レン
ズを取り外した状態を表わし、第３図Ｂは前面レ
ンズを装着した状態を表わしている。第４図は前
記実施例の作用、効果を説明するために示したも
ので、第４図Ａはスクリーン上の配光を表わした
図表、第４図Ｂは水平断面図に光路図を付記した
図である。第５図及び第６図は、それぞれ従来例
の前照灯を示す断面図である。第７図Ａ，Ｂ，Ｃ
、第８図Ａ，Ｂ、第９図および第１０図はそれぞ
れ先願の発明に係る自動車用前照灯の説明図であ
る１……ランプハウジング、１ａ……上記ランプ
ハウジングの内面に設けられた反射面、２，２′
光源バルブ、３……プリズムレンズによつて構成
された前面レンズ、４……従来例の、リフレクタ
拡散形前照灯のリフレクタ、５……素通し形の前
面レンズ、６……側方に存在する障害物、７……
洗願の発明の実施例におけるリフレクタ、１１…
…ランプハウジング、１２……前面レンズ、１２
ａ，１２ａ′……平行光束反斜面、１２ｂ……拡
散光束反射面、１３……フイラメント、１４……
前面レンズ、１４ａ，１４ａ′ステツププリズム
、１４ｂ……素通しプリズム、Ｆ……光源位置、
Ｚ……光軸、Ｘ……水平座標軸、Ｙ……垂直座標
軸。 Fig. 1 shows an embodiment of an automobile headlamp according to the present invention, Fig. 1A is a front view with the front lens removed, Fig. 1B is a sectional view taken along line B-B, and Fig.
Figure C is also a CC sectional view. 2A is a front view of the above embodiment, FIG. 2B is a sectional view of the step prism, and FIG. 2C is a sectional view of the transparent lens. FIG. 3 is a plan view showing the light distribution pattern of the above embodiment, in which FIG. 3A shows the state with the front lens removed, and FIG. 3B shows the state with the front lens attached. Fig. 4 is shown to explain the function and effect of the above embodiment, Fig. 4A is a diagram showing the light distribution on the screen, and Fig. 4B is a horizontal cross-sectional view with an optical path diagram attached. It is a diagram. FIGS. 5 and 6 are cross-sectional views showing conventional headlights, respectively. Figure 7 A, B, C
, FIGS. 8A and B, FIGS. 9 and 10 are explanatory diagrams of the automobile headlamp according to the invention of the earlier application. 1... Lamp housing, 1a... Provided on the inner surface of the lamp housing. reflective surface, 2,2'
Light source bulb, 3... Front lens constituted by a prism lens, 4... Reflector of a conventional reflector diffused headlamp, 5... Clear front lens, 6... Existing on the side. Obstacle, 7...
Reflector in the embodiment of the patented invention, 11...
...Lamp housing, 12...Front lens, 12
a, 12a'... Parallel light flux reverse slope, 12b... Diffuse light flux reflection surface, 13... Filament, 14...
Front lens, 14a, 14a' step prism, 14b... transparent prism, F... light source position,
Z...Optical axis, X...Horizontal coordinate axis, Y...Vertical coordinate axis.

Claims

[Scope of Claim for Utility Model Registration] An automobile headlamp having a structure in which a light source bulb is installed near the focal point of a concave mirror, and a front lens is provided to cover the front opening of the concave mirror, wherein the filament of the light source bulb is , disposed in a horizontal direction perpendicular to the optical axis of the concave mirror, and forming a reflective surface of the concave mirror into a parallel light flux reflecting surface located above the center, a parallel light flux reflecting surface located below the center, and a parallel light flux reflecting surface located below the center. and a diffused light beam reflecting surface located at a portion other than the two parallel light beam reflecting surfaces. The diffused light flux reflecting surface is shaped to diffuse and reflect at least a portion of the light incident from the filament in a substantially horizontal direction from side to side,
Further, the diffused light beam reflecting surface is configured so that a position closer to the center thereof exhibits a stronger diffusion tendency, and the area where the parallel light beam reflected by the parallel light beam reflection surface passes through the front lens has no horizontally incident light. A headlamp for an automobile, characterized in that a step prism is provided to refract the diffused light upward, and a prism without a step is provided in an area where the light beam including the diffused light reflected by the diffused light beam reflection surface passes through the front lens. light.