JPS6226702A - Lighting fixture - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a lighting fixture suitable for hanging type.

BACKGROUND OF THE INVENTION Conventionally, it has been difficult to improve the direct illuminance of lighting equipment using a single lamp due to the structure of the lamp.

Therefore, in the past, a plurality of circular lines were combined to provide general illumination. For example, 30W+30
Combination of two circle lines of W, 2 of 30W + 32W
Combinations of three circle lines, 30W+32W+40W, and two circle lines, 30W+40W, are the mainstream.

Problems to be Solved by the Invention However, such a combination results in a lamp arrangement in which a plurality of circle lines are superimposed.

It is difficult to make lighting equipment thinner. Of course, in order to make the device thinner, it would be sufficient to arrange a plurality of circular lines in a plane, but this would require an extremely large area and would be difficult to install. In addition, in this type of lighting equipment, there are cases in which all the lamps are turned on and cases in which the lamps are lighted in a thinned-out manner, but the thinned-out lighting only involves lighting the lowest circle line.

It is not possible to diversify the thinned-out lighting, and the lighting efficiency during the thinned-out lighting is poor due to the overlapping arrangement of the lamps.

SUMMARY OF THE INVENTION The present invention has been made in view of these points, and an object of the present invention is to provide a small and thin lighting device that is highly effective and can perform well-balanced thinning lighting. shall be.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a plurality of U-shaped fluorescent lamps 5a, 5a, 5c arranged in the same plane symmetrically with respect to the center φ of the device body with the bases 8 staggered. These U-shaped fluorescent lamps 5a, 5b, 5c are connected in such a way that they are arranged in parallel to each other, and these U-shaped fluorescent lamps 5a, 5b, 5c are lighted symmetrically with respect to the center φ of the device body. The system adopts a configuration in which:

By using the working U-shaped fluorescent lamp 5, the device main body can be made thinner by the planar arrangement of the plurality of U-shaped fluorescent lamps 5a, 5b, and 5c, and the illuminance directly below can be increased. At this time, these U-shaped fluorescent lamps 5a.

5b and 5c are arranged symmetrically with respect to the center φ, and the weight balance of the lighting device is maintained. In addition, since the lamps to be lit are regulated symmetrically with respect to the center φ during thinning lighting, the brightness of the irradiated surface does not become uneven.

Example An embodiment of the present invention will be described based on the drawings.

First, a lighting device 2 is provided on a top plate 1 that is suspended and supported on a ceiling surface. A reflector plate 3 is attached to the lower surface of the top plate 1, and a box-shaped shade 4 that expands downward is further provided.

In such a lighting fixture, three U-shaped fluorescent lamps 5a, 5b, and 5c are provided below the reflector plate 3. These U-shaped fluorescent lamps 5 are formed by a tube portion 6 bent into a U-shape and a cap 8 having a cap pin 7. The electrical connection is ensured by inserting the device into the Here, these U-shaped fluorescent lamps 5a, 5b, and 5c are arranged in parallel in the same plane. More specifically, when the center line of the device body is φ, the U-shaped fluorescent lamps 5b are arranged symmetrically with respect to the center line φ, and the U-shaped fluorescent lamps 5a and 5c are arranged on the center line φ. They are arranged at equal intervals with respect to the U-shaped fluorescent lamp 5b. Each of these U-shaped fluorescent lamps 5a, 5b, and 5c has a planar tube portion 6, and the caps 8 are arranged alternately (that is, the three caps are arranged alternately). 8 are arranged in a triangular shape). Further, a pull switch string 10 for operating the pull switch is provided to pass through the tube portion 6 of the central U-shaped fluorescent lamp 5b.

Note that ballasts and the like for lighting these U-shaped fluorescent lamps 5a, 5b, and 5C are appropriately arranged above the reflector plate 3.

According to such a configuration, the small U-shaped fluorescent lamp 5a,
5b and 5c can be used to easily arrange them in a planar manner, so that the lighting equipment can be made thinner without increasing its size.

At this time, since these U-shaped fluorescent lamps 5a, 5b, and 5C are symmetrical with respect to the center line φ, and the plurality of caps 8 are arranged alternately (sockets etc. are also alternately arranged), It has a good weight balance. Particularly in the case of a hanging device, such a good weight balance is effective, and the pull switch can also be placed in the center. Next, considering the lighting state, all the U-shaped fluorescent lamps 5a, 5b, and 5c can efficiently utilize the reflector 3, and the illumination efficiency is good, so that the direct illumination can be improved. When thinning out the lighting, the U-shaped fluorescent lamp 5a of the U-shaped fluorescent lamps 5a to 5c is symmetrically arranged with respect to the center line φ.
, 5c or the U-shaped fluorescent lamp 5b are connected so that the U-shaped fluorescent lamp 5a, 5b, and 5c are lit.

In other words, 3 lamps are lit - 2 lamps at both ends (U-shaped fluorescent lamps 5a, 5
c) Control: lighting → baby bulb (not shown) on → lights off, or control: 3 lights on → 1 light in the center (U-shaped fluorescent lamp 5b) on → baby bulb on → lights off, or 3 lights on → 2 lights on both ends (U-shaped fluorescent lamps 5a, 5C) turned on → 1 light in the center (
The U-shaped fluorescent lamp 5b) can be controlled by turning on → baby bulb turning on → turning off, and it is possible to diversify the thinned-out lighting. During such thinning lighting, the lamps that are turned on and the lamps that are turned off are symmetrical with respect to the center line φ, so the balance is good and the brightness of the irradiation surface is not uneven. Good thinning lighting is performed.

In this embodiment, there are three U-shaped fluorescent lamps 5a.

5b and 5c are used, but the number is not limited to three.

Effects of the Invention As described above, the present invention provides a plurality of U-shaped fluorescent lamps in parallel in the same plane symmetrically with respect to the center of the device.
It is possible to increase the illumination intensity while maintaining the weight balance due to its small size and thin profile.In this case, since the connection is used to thin out the lights in a centrally symmetrical manner, there is a good balance between the lights on and off when the lights are thinned out, and the illuminance of the irradiated surface is improved. It is possible to perform thinning lighting without causing unevenness in brightness.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a plan view of a U-shaped fluorescent lamp arrangement, and FIG. 2 is a schematic perspective view. 5a-5c...U-shaped fluorescent lamp, 8...Base, φ.
...Central line applicant Toshiba Electric Materials Corporation ~ Figure 12 Figure 0

Claims (1)

[Claims] A plurality of U-shaped fluorescent lamps are arranged in parallel on the same plane symmetrically with respect to the center of the fixture body with the bases staggered, and these U-shaped fluorescent lamps are thinned out symmetrically with respect to the center of the fixture body. A lighting device characterized in that these U-shaped fluorescent lamps are connected so as to be lit.