JPS6318086Y2

JPS6318086Y2 -

Info

Publication number: JPS6318086Y2
Application number: JP9492684U
Authority: JP
Priority date: 1984-06-25
Filing date: 1984-06-25
Publication date: 1988-05-23
Also published as: JPS619709U

Description

【考案の詳細な説明】〔技術分野〕この考案は、照明器具に関するものある。[Detailed explanation of the idea] 〔Technical field〕 This invention relates to lighting equipment.

[Background technology]

第４図に従来例を示す。すなわち埋込型照明器
具において、３０は反射板、３１は蛍光ランプ、
３２はプリズムパネルである。 FIG. 4 shows a conventional example. In other words, in the embedded lighting equipment, 30 is a reflector, 31 is a fluorescent lamp,
32 is a prism panel.

ところが、反射板３０が白色の場合、ランプ直
射光のみプリズムパネル３０で制御しているため
配光の制御に限界がある。一方、反射板３０を鏡
面にして反射板３０およびプリズムパネル３２で
光を制御する場合、反射板３０で光を制御すると
ある方向から見た場合、反射板表面の輝度が非常
に低い所が生じ、このことよりプリズムパネル３
２も同じくある方向から見た場合、輝度の非常に
低い部分が発生して美感上好ましくないという欠
点がある。 However, when the reflecting plate 30 is white, there is a limit to the control of light distribution because only the light directly emitted from the lamp is controlled by the prism panel 30. On the other hand, when the reflector 30 is made into a mirror surface and the light is controlled by the reflector 30 and the prism panel 32, when the light is controlled by the reflector 30, when viewed from a certain direction, there are places where the brightness of the reflector's surface is very low. , From this, prism panel 3
2 also has the disadvantage that when viewed from a certain direction, areas with very low brightness appear, which is not aesthetically pleasing.

[Purpose of invention]

この考案の目的は、配光制御が効率的でしかも
プリズムパネルの外観のよい照明器具を提供する
ことである。 The purpose of this invention is to provide a lighting fixture with efficient light distribution control and a good appearance of the prism panel.

[Disclosure of invention]

この考案の照明器具は、蛍光ランプと、この蛍
光ランプの後側に位置する白色反射面と蛍光ラン
プの両側部に位置する鏡面とを有する反射部と、
前記蛍光ランプの前側に位置するプリズムパネル
とを備えたことを特徴としている。 The lighting equipment of this invention includes a fluorescent lamp, a reflective part having a white reflective surface located on the rear side of the fluorescent lamp, and mirror surfaces located on both sides of the fluorescent lamp.
The present invention is characterized by comprising a prism panel located in front of the fluorescent lamp.

この考案の一実施例を第１図ないし第３図に基
づいて説明する。すなわち、図は天井埋込型照明
器具であり、１は天井、２は埋込穴、３は器具本
体、４は反射板、５は２本の蛍光ランプ、６は
枠、７は枠６に支持されたプリズムパネルであ
る。反射板４は天面すなわちランプ５の後側が白
色反射面８となり、側面が鏡面９となつている。
プリズムパネル７は外面がランプの長手方向に対
し平行にのび断面が三角形のプリズムをなすプリ
ズム条１０を横方向に多数連続形成している。 An embodiment of this invention will be explained based on FIGS. 1 to 3. In other words, the figure shows a ceiling-embedded lighting fixture; 1 is the ceiling, 2 is the embedding hole, 3 is the fixture body, 4 is a reflector, 5 is two fluorescent lamps, 6 is a frame, and 7 is in the frame 6. Supported prism panel. The reflector plate 4 has a top surface, that is, the rear side of the lamp 5, as a white reflective surface 8, and a side surface as a mirror surface 9.
The prism panel 7 has a large number of prism strips 10 formed in a row in the lateral direction, the outer surface of which extends parallel to the longitudinal direction of the lamp and whose cross section forms a triangular prism.

このように構成したため、鏡面９の部分でラン
プ５が映り込まない範囲すなわち第１図Ａ〜Ｄの
範囲は、必らず白色反射面８が映り込む。したが
つて反射板４の全体として白色反射面が形成され
たのと実質的に同じになり、光むらのない暗い部
分の生じない均一な明るさがプリズムパネル７に
顕現し、美感がよくなる。また第２図は第１図の
部分Ｘを拡大し、第３図は第１図の部分Ｙを拡大
したものであるが、ランプ５の直接光Ｌが入射角
α₁，α₁′で入射すると透過角α₂，α₂′で拡散すると
ともに鏡面９の反射光Ｍが入射角β₁，β₁′で入射
して透過角β₂，β₂′で拡散するため、配光制御が
効率よくなる。なお、入射角β₁，β₁′が全反射し
ない角度となるように反射板４の形状を設定する
ものとする。 With this configuration, the white reflective surface 8 is always reflected in the range where the lamp 5 is not reflected on the mirror surface 9, that is, the range shown in FIGS. 1A to 1D. Therefore, it is substantially the same as if a white reflective surface were formed as a whole of the reflector plate 4, and uniform brightness without unevenness and dark areas appears on the prism panel 7, improving the aesthetic appearance. In addition, Fig. 2 is an enlarged view of the portion X in Fig. ₁ , and Fig. 3 is an enlarged view of the portion Y in Fig. ₁ . Then, light is diffused at transmission angles α ₂ and α ₂ ′, and the reflected light M from the mirror surface 9 is incident at incidence angles β ₁ and β ₁ ′ and diffused at transmission angles β ₂ and β ₂ ′, so that light distribution control becomes efficient. get well. Note that the shape of the reflection plate 4 is set so that the incident angles β ₁ and β ₁ ' are angles that do not cause total reflection.

またこの考案において、白色反射面８は器具本
体３に別設されてもよい。 Further, in this invention, the white reflective surface 8 may be provided separately on the instrument body 3.

[Effect of idea]

この考案によれば、配光制御が効率良くできし
かも光むらがないのでプリズムパネル面の外観が
向上するという効果がある。 According to this invention, the light distribution can be controlled efficiently and there is no light unevenness, so there is an effect that the appearance of the prism panel surface is improved.

[Brief explanation of drawings]

第１図はこの考案の一実施例の概略断面図、第
２図は第１図の部分Ｘの拡大図、第３図は第１図
の部分Ｙの拡大図、第４図は従来例の概略断面図
である。４……反射板、７……プリズムパネル、８……
白色反射面、９……鏡面。 Fig. 1 is a schematic sectional view of an embodiment of this invention, Fig. 2 is an enlarged view of part X in Fig. 1, Fig. 3 is an enlarged view of part Y in Fig. It is a schematic sectional view. 4...Reflector, 7...Prism panel, 8...
White reflective surface, 9...mirror surface.

Claims

[Scope of utility model registration request]

A lighting fixture comprising: a fluorescent lamp; a reflective section having a white reflective surface located on the rear side of the fluorescent lamp; and mirror surfaces located on both sides of the fluorescent lamp; and a prism panel located on the front side of the fluorescent lamp.