JPS6326910U

JPS6326910U -

Info

Publication number: JPS6326910U
Application number: JP12147386U
Authority: JP
Priority date: 1986-08-06
Filing date: 1986-08-06
Publication date: 1988-02-22

Description

[Brief explanation of the drawing]

第１図はこの考案の原理を説明するための図、
第２図、第３図はこの考案の実施例を示し、第２
図イは一部切欠き正面図、第３図イは一部切欠き
全体側面図、第２図ロは反射板の支持アームと内
枠の取付け枠との結合部を示す要部の断面図、第
３図ロは第２図ロの一部切欠き側面図である。符号説明、１：放物曲線反射板、１ａ：開口縁
、２：光源、３：遮光板、３ａ：口縁、４：筒状
体、５：フイラメント、６：グレア吸収面、ｌ：
反射板の開口半径、Ｌ：フイラメント長、Ｘ′：
遮光板の周縁上を通る水平線、Ｚ：フイラメント
と遮光板の周縁とを結ぶ線分、Ｚ′：線分Ｚの延
長線、Ｑ：延長線Ｚ′がフードと交わる点。 Figure 1 is a diagram to explain the principle of this invention.
Figures 2 and 3 show an embodiment of this invention, and the second
Figure A is a partially cutaway front view, Figure 3A is a partially cutaway overall side view, and Figure 2B is a sectional view of the main part showing the joint between the support arm of the reflector and the mounting frame of the inner frame. , FIG. 3(b) is a partially cutaway side view of FIG. 2(b). Description of symbols, 1: Parabolic curved reflector, 1a: Opening edge, 2: Light source, 3: Light shielding plate, 3a: Mouth edge, 4: Cylindrical body, 5: Filament, 6: Glare absorption surface, l:
Reflector aperture radius, L: filament length, X':
A horizontal line passing over the periphery of the shading plate, Z: a line segment connecting the filament and the periphery of the shading plate, Z': an extension of line segment Z, Q: a point where the extension line Z' intersects with the hood.

Claims

[Scope of utility model registration request]

a parabolic curve reflector 1 with a light source 2 disposed on the focal point;
It includes a light shielding plate 3 disposed below the light source and a cylindrical body 4 integrally connected to the opening edge 1a of the reflecting plate 1, and the opening radius l of the reflecting plate 1 is set to 10 of the light source filament length L.
The angle θ formed by the line segment Z connecting the filament 5 and the peripheral edge 3a of the light shielding plate 3 and the horizontal line segment X' passing over the peripheral edge 3a of the light shielding plate 3 is within 35 degrees. In addition, the distance between the peripheral edge 3a and the filament 5 is set to 1.5 to 2.5 of the filament length L.
The inner surface of the cylindrical body 4 includes the point Q where the extension line Z' of the line segment Z connecting the filament 5 and the periphery 3a of the light shielding plate 3 intersects with the reflecting plate 3.
A lighting fixture characterized by comprising a glare absorbing surface 6 over the entire area up to the opening edge 1a.