JPH0364808A - Liminaire - Google Patents

Abstract

PURPOSE:To nearly even the luminous flux entering openings between louver pieces and eliminate the unevenness of the luminance of a louver by providing a first louver piece to be provided along the longitudinal direction of a lamp with three openings formed between lamps adjacent to each other, and facing the intermediate opening to reflecting material of which section if V-shape in outline. CONSTITUTION:When a distance between lamps adjacent to each other is set at l, dimension of the opening diameter of each opening 12a - 12c of a first louver piece of a louver 11 is set about l13, and the arm part of the louver piece 13 is positioned just under the lamps 4 to position the intermediate opening 12c at the position opposite to a V-shape reflecting surface part 7. The luminance flux of the light irradiated from the lamps 4 evenly enters to the openings 12a, 12b near the just under part of the first louver piece 13, and the luminance of the first louver becomes nearly even. The outgoing light from the lamps 4 to the rateral direction is reflected by a mirror reflecting surface 6 of the V-shape reflecting surface part 7 formed between the lamps 4, 4, and this reflected light enters the opening 12c separated from the lamps 4. The nearly even luminance can be thereby obtained in the openings 12a - 12c of the louver 11, and the unevenness of the luminance is eliminated.

Description

[Detailed description of the invention] [Purpose of the invention] (Industrial application field) The present invention relates to a lighting fixture provided with a louver.

(Prior Art) Recently, a large number of OA equipment (office automation equipment) have been introduced, and a lighting environment suitable for these equipment has been required. A louver is used as a point lighting fixture for OA to prevent the light source from reflecting on the CRT display screen.

The lighting equipment constructed as described above is, for example,
As shown in Japanese Patent No. 40329, a louver in which louver pieces are arranged in a lattice shape is provided in a light projection opening of a main body of a device in which a plurality of tubular lamps are arranged side by side.

What is shown in this Utility Model Publication No. 62-40329 is
The louver is composed of a longitudinal louver piece with four to five openings formed between adjacent lamps along the longitudinal direction of the lamp, and a short louver piece that intersects the long direction louver piece. This is what we are doing.

(Problem to be Solved by the Invention) However, since the lighting fixture shown in the above-mentioned Japanese Utility Model Publication No. 62-40329 has a louver with four to five openings formed on the bottom side of the lamp, The brightness of the louver pieces is high, and the middle louver pieces away from the lamp are dark, and when viewed from the bottom, uneven brightness occurs between the louver pieces, resulting in an unsightly appearance.

In order to solve this problem, it is conceivable to increase the distance between the lamp and the louver, but in this case there is a disadvantage that the efficiency of the appliance decreases.

The present invention has been made in consideration of the above-mentioned circumstances, and in a lighting fixture equipped with a louver in which the louver pieces are arranged in a grid pattern, the present invention eliminates uneven brightness of the louver by substantially equalizing the light flux that enters the openings between the louver pieces. The purpose is to provide lighting equipment with

[Structure of the Invention] (Means for Solving the Problems) The lighting fixture of the present invention has a mirror or semi-mirror reflective surface between a plurality of tubular lamps arranged in parallel in a fixture main body having a light emitting opening on the lower surface. The formed cross-sectional path is V-shaped! 11 bodies are disposed along the longitudinal direction of the lamp so as to be substantially opposite to the lamp, and three openings are formed between adjacent lamps along the longitudinal direction of the lamp, with the middle opening facing the reflector. A lattice-shaped louver including a plurality of first louver pieces arranged at approximately equal intervals and a second louver piece formed to intersect with the first louver pieces is arranged in the light projection opening of the fixture body. It is characterized by having been established.

(Function) The light emitted from the lamp is directly directed downward and illuminates the area immediately below it and one side of the louver piece between the lamps, making it shine, and the light emitted laterally from the lamp is reflected by the reflection formed between the lamps. The light is reflected by the body and illuminates the other side of the louver piece between the lamps. Therefore, the louver pieces between the lamps shine almost equally with the louver pieces directly below the lamps due to the direct light from the lamps and the reflected light from the reflector, and uneven brightness can be prevented.

(Example) An example of the present invention will be described with reference to FIGS. 1 and 2. Reference numeral 1 denotes a device main body, which is formed into an elongated box shape with a light projection opening 2 on the lower surface, and is embedded in a ceiling surface A with a bent edge 3 bent outward at the edge of the opening. Reference numeral 4 denotes a tube-shaped lamp, and the tube-shaped lamp 4 is, for example, a straight tube-type fluorescent lamp with a double base, and a plurality of lamps (in this embodiment, two lamps) are arranged along the opening surface of the light emitting opening 2. They are installed side by side. 5
is a reflector, and this reflector 5 has a reflective surface 6 formed into a mirror or semi-mirror surface, and has a V-shaped cross section that is arranged between adjacent lamps 4 along the longitudinal direction of the lamps 4, facing the lamps 4. The device includes a reflective surface portion 7, a top reflective surface portion 8 extending from the reflective surface portion 7, and a side reflective surface portion 9 provided on the side of the top reflective surface portion 8. ing.

11 is a louver, and this louver 11 has three openings 12a to 12c between adjacent lamps 4 along the longitudinal direction of the lamp 4.
A plurality of first louver pieces 13 are formed and the intermediate opening 12c is arranged at approximately equal intervals so as to face the V-shaped reflective surface portion 7 of the reflector 5, and the first louver pieces 13 intersect with each other. The second louver piece 14 includes a plurality of second louver pieces 14 spaced apart from each other, forming a lattice shape.

The louver 11 is supported by a frame 15 provided at the edge of the light emitting opening 2 of the instrument main body 1, and is provided in the light emitting opening 2.

To explain in more detail about the V-shaped reflective surface portion 7 of the reflector 5, this reflective surface portion 7 has an opening angle α of approximately 60° to 140°.
The reflecting surface 6 is preferably formed into a mirror or semi-mirror surface, and is formed into a mirror surface in this embodiment.

In addition, the first louver piece 13 of the louver 11 has an opening diameter of approximately A, where the distance between adjacent lamps 4 is 1, and the opening diameter of each opening 12a to 12c is approximately A! /3, and by positioning the side louver piece I3 directly below the lamp 4, the middle opening 12c is positioned opposite to the V-shaped reflective surface part 7.

The first louver 11. The second louver pieces 13, 14 are made of synthetic resin, for example, and have white surfaces.

Next, the operation of this embodiment will be explained.・Lamp 4
When the lamp 4 is turned on, the light emitted from the lamp 4 enters the openings 12a and 12b directly below the lamp 4 almost equally, and the first loop piece 13 has approximately the same brightness. Then, reflected light that is emitted laterally from the lamp 4 and reflected by the specular reflection surface 6 of the V-shaped reflection surface portion 7 formed between the lamps 4 and 4 enters the opening 12c that is remote from the lamp 4. Therefore, the openings 12a, 1 of the louver 11
2b and 12c have approximately the same brightness, and the louver 11
This prevents uneven brightness. In addition, lamp 4 and louver 11
Since there is no need to increase the distance between the two, it is possible to prevent a decrease in instrument efficiency.

Although the present invention has been described based on the above illustrated embodiment, the present invention allows various other embodiments. For example, there may be three lamps. In this case, a V-shaped reflective surface portion 7 may be provided between the two lamps 4. Further, the lamp may be a straight tube lamp with a single base having a rod-shaped arc tube portion.

Furthermore, as shown in FIG. 3, the main body of the device may also be provided with a light projection opening 21i on the upper surface side to provide semi-indirect illumination for upward irradiation. In this embodiment, the same parts as those in the above embodiment are given the same reference numerals, and the explanation thereof will be omitted.

[Effects of the Invention] The present invention provides a lamp with a reflector having a V-shaped cross section with a reflective surface formed into a mirror or semi-mirror surface between a plurality of tubular lamps arranged in parallel in a device main body having a light emitting opening on the lower surface. A first louver piece is disposed substantially opposite the lamp along the longitudinal direction of the louver, and the first louver piece is disposed along the longitudinal direction of the lamp, and three openings are formed between adjacent lamps. The louver aperture between the lamps and the louver aperture directly below the lamp are illuminated with approximately the same luminous flux, so that the louver aperture faces a reflector with a V-shaped cross section. Brightness unevenness can be effectively prevented. Furthermore, since there is no need to increase the distance between the lamp and the louver, it is possible to effectively prevent a decrease in the efficiency of the appliance.

[Brief explanation of drawings]

Figures 1 and 2 show one embodiment of the present invention, with Figure 1 being a longitudinal sectional view, Figure 2 being a perspective view of the device installed on the ceiling, and Figure 3 being a perspective view of the device installed on the ceiling.
The figure is a longitudinal sectional view of another embodiment. 1... Fixture body, 2... Lower surface light projection opening. 4...tubular lamp, 5...reflector, 6...
・Reflective surface. 7... V-shaped reflective surface portion, 11... Louver. 12a, 12b, 12cm...opening. 13...First louver piece, 14... Second louver piece.

Claims (1)

[Claims] (1) A device main body having a light emitting opening on the lower surface; a plurality of tubular lamps arranged in parallel within this device main body; reflective surfaces formed into mirror or semi-mirror surfaces and adjacent to each other along the longitudinal direction of the lamps; a reflector comprising a reflecting surface portion having a substantially V-shaped cross section and disposed between the lamps so as to face the lamps; a plurality of first louver pieces disposed at approximately equal intervals with openings facing the reflective surface of the reflector, and a plurality of second louver pieces disposed intersecting the first louver pieces and spaced apart from each other. A lighting fixture comprising: a louver having a grid shape including louver pieces and provided in the light projection opening;