JPS63129901U

JPS63129901U -

Info

Publication number: JPS63129901U
Application number: JP2132187U
Authority: JP
Priority date: 1987-02-18
Filing date: 1987-02-18
Publication date: 1988-08-25

Description

[Brief explanation of the drawing]

第１図は、この考案に係るプロジエクタヘツド
ランプ構造の概略側断面図、第２図は、遮蔽板の
進退・位置決めによる照射光量調節状態について
の説明図、第３図は、第１図中の矢示方向から
みた側断面図、第４図は、この考案の要部を示す
概略斜視図、そして第５図は、従来のプロジエク
タヘツドランプ構造の概略側断面図である。１，２０……プロジエクタヘツドランプ構造、
２……リフレクタ、３，２１……レンズホルダ、
４……レンズ、５……光線、６……第１焦点、８
……バルブ（光源）、９……第２焦点、２２……
遮蔽板、２３……通光孔。 Fig. 1 is a schematic side sectional view of the projector head lamp structure according to this invention, Fig. 2 is an explanatory diagram of how the amount of irradiated light is adjusted by advancing and retreating and positioning the shielding plate, and Fig. 3 is the same as in Fig. 1. 4 is a schematic perspective view showing the main parts of this invention, and FIG. 5 is a schematic side sectional view of a conventional projector head lamp structure. 1, 20... projector head lamp structure,
2... Reflector, 3, 21... Lens holder,
4...Lens, 5...Light ray, 6...First focal point, 8
... Bulb (light source), 9 ... Second focal point, 22 ...
Shielding plate, 23...light passing hole.

Claims

[Claim for Utility Model Registration] Light rays emitted from a light source placed at the first focus of a semi-ellipsoidal reflector, reflected by the reflector, and irradiated forward are transmitted into a cylindrical lens holder placed in front of the reflector. In a projector head lamp structure in which the light is condensed to a second focal point formed and then irradiated to the outside through a lens placed in front of the lens holder, a light beam is placed inside the lens holder in the cross-sectional shape of the lens holder. The amount of light incident on the lens can be adjusted by arranging shielding plates having a corresponding external shape and having a light passing hole in the center so as to intersect at right angles to the direction of irradiation of the light beam, and moving the shielding plates back and forth in the direction of irradiation of the light beam and positioning them. A projector head lamp structure characterized in that the amount of light irradiated to the outside can be adjusted freely.