JPH0328002B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates in particular to a lighting fixture using a substantially U-shaped lamp.

Conventional technology In the past, most of the lighting fixtures using approximately U-shaped discharge lamps were pendant-type lighting fixtures, but U-shaped high W-shaped lamps with long tube lengths (twin lamps...product name) ) was developed, it became possible to use it in multiple ceiling lights.

Problems to be Solved by the Invention However, such lamps are of the 36W type and have high illuminance, and due to the large amount of heat generated by the ballast used, the temperature rise within the lighting equipment increases significantly. As the lamp current increases, the amount of heat generated by the ballast further increases, causing a problem in that the temperature rise far exceeds the allowable value.
Due to this situation, various countermeasures have been taken, such as making the bottom surface of the globe open.However, in the case of three lights, it is desirable to arrange the ballast as a whole in a roughly L-shape. It was discovered that the ballast placed at the bending point of the L-shape received the most heat from the surrounding ballasts and lamps, resulting in the most significant temperature rise, and it was concluded that countermeasures against heat generated by this ballast were the most important. It was done.

Therefore, the present invention aims to reduce the temperature rise of the ballast.

Means for Solving the Problems According to the present invention, three lamps are arranged on the chassis, and two ballasts and one ballast are placed in the two spaces between the lamps in a generally L-shape as a whole. The lighting equipment is characterized in that the lamps arranged outside the one ballast are lit by the ballast placed at the bending point of the substantially L-shape.

Effects According to the present invention, the lamps corresponding to the ballasts arranged in a substantially L-shaped folded line (where the temperature rise is most significant as described above) are arranged outside the one ballast mentioned above. (Since there is only one ballast nearby, the temperature rise is the smallest.) Since the current of this lamp is the smallest, approximately L
The temperature rise of the ballast placed at the bending point of the shape can be reduced.

Example Embodiments of the present invention will be described with reference to the drawings.

Three discharge type lamps (substantially U-shaped) 2a, 2b, 2c are arranged on the chassis 1, and each base 3 is connected to each socket 4. Socket 4 is chassis 1
It is supported by a socket support 5 attached to the socket. The ends of the lamps 2a, 2b, 2c are supported on the chassis 1 by a lamp support 6 having a substantially U-shaped holding piece. The two spaces between the lamps 2a, 2b, 2c have two and one ballasts 7a, 7b, 7 respectively.
c is arranged so as to form a substantially L-shape as a whole.
The ballasts 7a, 7b, and 7c are attached to the chassis 1 via a heat sink 8 made of an aluminum plate. The heat sink 8 extends outward from the ballasts 7a, 7b, 7c.

Lamps 2 arranged outside the one ballast 7b with a ballast 7c arranged at the bending point of the substantially L-shape.
It is electrically connected to light up c. That is, the ballast 7c and the lamp 2c correspond. Also, ballast 7a-lamp 2a, ballast 7b-lamp 2b
correspond to each other, but this correspondence relationship may be crossed. Three glow starters 9 are arranged in the open space between the lamps 2b and 2c outside the substantially L-shape, and a miniature bulb 10 and a switch 11 are arranged in the same space. 12 is the starter socket, 13
is a miniature ball socket.

14 is a current fuse, one is a ballast 7a, 7
b and 7c, and the other one corresponds to the remaining one. 15 is a pull string for the switch 11. 16 is a glove guide provided at the four corners of the chassis 1, and 17 is a glove support. In addition, the chassis 1 has a circularly recessed mounting part 18 in the center thereof, and screws 20 screwed into support pieces 19a extending on both sides of a fixture 19 mounted on the ceiling are inserted into the daruma holes 18a of the mounting part 18. , rotate the chassis 1 slightly, and then tighten the screws 20 to attach the chassis 1 to the ceiling. Reference numeral 21 denotes a connector attached to the ceiling, to which a plug 22 is connected through the hole 18b of the mounting portion 18 to receive power.

A corrugated reflecting plate 23 is attached to the bottom surface of the chassis 1 with screws 24. Lamps 2a, 2b, 2c are located on the lower surface of the reflector 23, and ballasts 7a, 7b, 7c, starter 9, starter socket 12, miniature bulb socket 13, and switch 1 are located on the upper surface of the reflector 23.
1. The mounting portion 18, screw 20, plug 22, etc. are located. At this time, the starter 9
Starter 9 should be exposed even slightly from the end of 3.
It is advantageous for the exchange of The reflecting plate 23 is provided with a hole 23a through which the miniature ball 10 passes, and a hole 23b through which the drawstring 15 is passed, and ventilation holes 23c are provided directly below the stabilizers 7a, 7b, and 7c, respectively. A portion of the heat sink 8 is exposed from the side edge of the reflection plate 23. The glove 25 is a commonly used support device 26.
It is supported by a glove support 17 at the bottom, and a louver 27 is attached to the lower surface.

According to the above configuration, the ballast 7c is surrounded by the ballast 7a and the lamps 2a and 2b and has the worst conditions;
Since the lamp 2c corresponding to this ballast 7c only has the ballast 7b nearby, the current of the lamp 2c is comparatively small due to favorable conditions compared to the other lamps 2a and 2b, so the current of the ballast 7c is can be made small, and the temperature rise of this ballast 7c can be reduced. Normally, lamps 2a, 2b, 2c and ballasts 7a, 7
For the electrical connections with b and 7c, it is possible to have a corresponding relationship such as lamp 2a - ballast 7c, lamp 2b - ballast 7a, lamp 2c - ballast 7b only from the viewpoint of wiring processing, productivity and cost. Although there are many cases, in such a case, the ballast 7c has a ballast 7a nearby.
Lamp 2 with a large lamp current that has 7c and
This exposes the drawback that the current a flows and the amount of heat generated increases. Therefore, in the case of the present invention, there may be disadvantages in connection processing, etc., but the ballast 7
It is possible to provide a highly reliable lighting fixture that can extend the life of c. Incidentally, according to the present invention, the temperature rise of the ballast 7c could be reduced by about 5 degrees compared to the case of conventional wiring processing.

Also, if the ballast 7c and lamp 2b are matched,
The temperature rise of ballast 7c is the worst, and ballast 7b
If the lamp 2c is made to correspond to the lamp 2c, the temperature rise of the ballast 7b will be the best.

Note that the ballast here refers to all lamp control means such as wire-wound type, semiconductor circuit type, and dimmer circuit type.

Effects of the invention As is already clear from the detailed description above,
According to the present invention, it is possible to achieve electrical connection between the ballast with the worst temperature condition and the lamp with the best temperature condition, thereby reducing the temperature rise of this ballast and extending its life, thereby improving reliability. This has the extremely excellent effect of providing high quality lighting equipment.

[Brief explanation of the drawing]

The drawings show a lighting device according to an embodiment of the present invention, in which FIG. 1 is a bottom view of the chassis, FIG. 2 is a vertical sectional view, FIG. 3 is an external perspective view, and FIG. 4 is an exploded perspective view. 1... Chassis, 2a, 2b, 2c... Lamp, 7
a, 7b, 7c...ballast.

Claims (1)

[Claims] 1 Arrange three lamps on the chassis, and arrange two ballasts and one ballast in the two spaces between these lamps so that the whole has a substantially L-shape,
With the stabilizer placed at the bending point of this approximately L-shape,
A lighting device characterized by lighting lamps arranged outside of individual ballasts.