JPH0220870Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to an electronic equipment unit used for dimming control of loads such as discharge lamps or incandescent lamps.

Conventional configuration and its problems Traditionally, electronic equipment units capable of dimming control as described above have a metal chassis, a power semiconductor element such as a large thyristor, and a printed circuit board for a small signal circuit that controls this element. However, since the small signal circuit blocks air flow to the power semiconductor elements, it is necessary to use a fairly thick chassis, which increases costs considerably. This also resulted in the disadvantage of increased weight. Also,
Since the breaker for preventing overcurrent of the power semiconductor element is installed separately from the above-mentioned unit, the wiring between them becomes long and there are drawbacks such as difficulty in handling during assembly.

Purpose of the invention The purpose of this invention is to fundamentally eliminate the above-mentioned drawbacks, to make the chassis lighter and cheaper, to have a structure that improves heat dissipation, and to improve the overall cohesion and ease of handling. has.

Structure of the Invention In order to achieve the above object, the present invention is bent into a substantially U-shape with bent portions 10, 11, and 12 on both sides, and openings 7 and 8 are formed at both ends. A metal chassis 6 has a structure in which a notch 9 is provided and a bent part 12 is used for attachment, and the chassis 6 is located in the notch 9 and attached to the outside of the bent part 10 of the chassis 6 so as to have a generally rectangular shape as a whole. Breaker 13
and the power semiconductor element 14 attached to the communication part 15 between the openings 7 and 8, and the power semiconductor element 14 attached to the chassis 6, which is located inside the bent part 11 so as to avoid the communication part 15 and line up almost in a straight line with the breaker 13. It constitutes an electronic equipment unit characterized by having a small signal circuit section 16 attached thereto, and the power semiconductor element is attached to the communication section between the openings provided at both ends of the chassis, so that air Distribution is good, and the chassis can be made with a thin wall, making it lightweight and inexpensive, and the breaker is attached to a notch in the corner of the chassis, which makes the whole thing cohesive and easy to handle. Furthermore, the small signal circuit section is attached to the chassis avoiding the communication section,
Therefore, even if the breaker obstructs air circulation, the small signal circuit section, which generates little heat, will not deteriorate.

DESCRIPTION OF EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a dimming control panel A in which a large number of electronic equipment units 1 are arranged in parallel according to an embodiment of the present invention, and includes a main breaker 2, a bus bar 3 for power supply, a control panel 4, and a discharge lamp or an incandescent lamp. It has a terminal block 5 etc. for connection to loads such as.

The detailed structure of the electronic device unit 1 is shown in FIGS. 2 and 3. Reference numeral 6 is a metal chassis such as an aluminum plate, which is bent into a substantially U-shape, and has both upper and lower ends. Openings 7 and 8 are formed at each of the sides, and a notch 9 is provided at the corner. That is, as seen in FIG. 2, the chassis 6 has a rectangular shape with one corner cut out. 1
0 to 12 are bent portions along both sides of the chassis 6, respectively. A breaker 13 is attached to the outside of the bent portion 10 of the chassis 6 at the cutout portion 9 .
A large thyristor 14 is a power semiconductor element, and is attached to a communication portion 15 between the openings 7 and 8 to improve air circulation and enhance the heat dissipation effect. A printed circuit board 16 is a small signal circuit section, and is attached to the chassis 6 avoiding the communication section 15. That is, although air flow to the small signal circuit section 16 is obstructed by the breaker 13, there is no problem since the heat generation is originally small. The chassis 6 is attached to the dimming control panel A by screwing both ends of the bent portion 12. The breaker 13 is screwed to the baking plate 17, and a screw for attaching a mounting leg 19 of a noise filter coil element 18 is screwed into the baking plate 17 through the bent portion 10.
The semiconductor element 14 is screwed to the chassis 6.
The small signal circuit section 16 is attached to the chassis 6 using a so-called locking support or the like.

As shown in Fig. 3, a large number of electronic equipment units 1 are arranged side by side with their breakers 13 in contact with each other, and although the chassis 6 has a relatively simple structure, the overall mechanical strength is It's improving.

In this embodiment, since the electronic device unit 1 is installed in the vertical direction, that is, with the openings 7 and 8 facing upward and downward, the opening 8 → the communication section 15
→ Air flows naturally to the opening 7, improving heat dissipation, but even when installed horizontally, the air flow path is secured, so it is clear that a much better heat dissipation effect than conventional products can be expected. It is.

Effects of the invention From the above details, it is clear that the present invention has extremely good heat dissipation from power semiconductor elements, reduces the thickness of the chassis to reduce weight and cost, and also allows the breaker to be placed at the corner of the chassis. Because it is located in the notch of the section, the unit as a whole has a roughly rectangular shape, making it well-organized and easy to handle.
This has the advantage of securing a mounting location for the small signal circuit section, and can be usefully used as an electronic equipment unit for dimming control.

[Brief explanation of the drawing]

FIG. 1 is a front view of a dimming control panel to which the electronic device unit of the present invention is applied, FIG. 2 is a side view of the same unit, and FIG. 3 is a top view of the same unit. 1...Electronic device unit, 6...Chassis,
7, 8...opening, 9...notch, 10-12...
...Bending part, 13...Breaker, 14...Power semiconductor element, 15...Communication part, 16...Small signal circuit part.

Claims (1)

[Scope of utility model registration request] It is bent into a substantially U-shape with bent parts 10, 11, and 12 on both sides, openings 7 and 8 are formed at both ends, and a notch 9 is provided at the corner, with the bent part 12 used for mounting. a metal chassis 6 having a structure;
A breaker 13 is located in the notch 9 and attached to the outside of the bent part 10 of the chassis 6 so as to have a generally rectangular shape, and a power semiconductor element 14 is attached to the communication part 15 between the openings 7 and 8. , and a small signal circuit section 16 mounted on the chassis 6 and located inside the bending section 11 so as to be substantially in line with the breaker 13, avoiding the communication section 15.