JPS5932842B2 - multiple light fixtures - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a multi-lamp lighting device using straight tube fluorescent lamps, and particularly to a multi-lamp lighting device equipped with an inter-lamp reflector and a diffuser light plate.

The human eye has the characteristic that it feels particularly dazzling within a range of about 30 degrees (glare zone) with respect to the line of sight.

Glare-cutting treatments address this issue by making the lower edge of the reflector that surrounds the outside of the lamp reach below the lamp, preventing direct light from the lamp from entering the glare zone. If the lighting equipment is a multi-lamp type, an inter-lamp reflector is installed between the lamps.

An example of this is shown in FIG.

In the figure, 1 is a main body with a built-in ballast 6, 2 is a socket, 3 is a lamp, 7 is a ceiling surface, and two lamps 3 are arranged in parallel.

4 is a reflecting plate, and an inter-lamp reflecting plate 5 disposed between the lamps 3 is provided integrally with this reflecting plate 4.

The lower edge of the reflector plate 4 and the lower edge of the inter-lamp reflector plate 5 are both located below the lamp 3, and are subjected to glare-cutting treatment to prevent direct light from the lamp 3 from entering the glare zone. It is.

By the way, the bottom opening of such a multi-light fixture is
As shown in the figure, when covered with a flat diffuser plate 10 such as a prism cover, depending on the line of sight direction, the diffuser plate 10
The surface of the lamp had a different brightness with the lower part of the inter-lamp reflector 5 as a boundary, causing a gap.

This occurs due to the presence of the inter-lamp reflector 5, and is particularly noticeable when the inter-lamp reflector 5 has a cross-sectional shape.

The present invention has been made in view of these points, and although there is an inter-lamp reflector whose lower edge is located below the lamp, the brightness of the diffuser plate covering the lower opening is uniform throughout the entire surface. To provide a multi-light lighting fixture that does not cause a sense of discomfort.

To explain the present invention below, the present invention comprises at least two
The straight tube lamps of the lamp are arranged in parallel, and reflectors are provided on the outside and above the group of lamps, and between the lamps there is a reflector between the lamps that is parallel to the lamps. In a lighting fixture in which the lower edge of the edge and the inter-lamp reflector is located below the lamp, the lower edge of the inter-lamp reflector is located below the inter-lamp reflector whose cross section orthogonal to the lamp is in the shape of a 7, and covers the lower opening. The light diffusing plate is characterized by having a bent edge located directly below the lower edge of the inter-lamp reflecting plate, and this configuration achieves the above object.

Next, the present invention will be explained in detail based on the illustrated embodiment.
In the figures below, 1 is a main body with a built-in stabilizer 6,
It has two pairs of sockets 2 on the lower surface, and the straight tube fluorescent lamps 3 attached to the sockets 2 are arranged in parallel.

The reflector plate 4 surrounds the upper and outer sides of these lamps 3, 3, and is attached to the lower surface of the main body 1.

The lower edge of the side piece of the reflector plate 4 is located below the lamp 3.

Inter-lamp reflector 5 suspended between lamps 3
The lamp 3 has a 7-shaped cross section in a plane perpendicular to the axial direction of the lamp 3, and its lower edge is lower than the lamp 3 and is arranged parallel to the lamp 3.

A diffusing light plate 10 made of a prism cover, punching metal, etc., located below the inter-lamp reflector 5 and covering the lower opening of the lighting fixture embedded in the ceiling T, has locking edges 11 on both sides thereof as a reflector. 4, and the bent edge 13 is positioned directly below the lower edge of the inter-lamp reflector 5.
It is bent into a letter shape.

For this reason, even when this lighting fixture is looked up diagonally from below, the diffuser light plate 10 has an average luminance of the surface of the lower part of the inter-lamp reflector 5, that is, the left and right halves in the figure bordered by the bent edge 13. are equal, and the entire surface of the light diffusing plate 10 appears uniform.

As described above, in the present invention, the entire surface of the diffuser light plate has uniform brightness despite the presence of the inter-lamp reflector, and does not cause any discomfort.
Therefore, even if a diffuser plate is attached to a glareless type lighting fixture that has an inter-lamp reflector and does not use a diffuser plate, problems with the brightness of the diffuser plate will not occur. There is no need to go through the trouble of changing to reflector plates between lamps with different shapes, and glareless type lighting fixtures that do not use a diffuser plate and lighting fixtures that use a diffuser plate are simply diffuser plates. It can be shared simply by the presence or absence of the .

[Brief explanation of drawings]

Figure 1 is a sectional view of the conventional example, Figure 2 is a partial sectional view of the same as above,
FIG. 3 is a cutaway front view of an embodiment of the present invention, and FIG. 4 is a partial cross-sectional view of the same, in which 3 is a lamp, 4 is a reflector, 5 is an inter-lamp reflector, and 10 is a diffuser light plate.

Claims (1)

[Claims] 1 A lighting fixture in which at least two straight tube lamps are arranged in parallel, and reflectors are disposed on the outside and above the group of lamps. An inter-lamp reflector whose edge is located below the lamp, and between each lamp, the cross section perpendicular to the lamp is in the shape of a 7, and whose lower edge is located below the lamp, is arranged parallel to the lamp, and the lower surface A multi-lamp lighting fixture, characterized in that a bent edge of a diffuser light plate having a V-shaped cross section and covering the opening is disposed directly below the lower edge of the inter-lamp reflector.