JPH06232574A - Printed circuit board unit - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention relates to a printed circuit board unit, and more particularly to a printed circuit board unit that is mounted in an electronic device and cooled by cold air. The purpose of this is to improve the cooling efficiency by passing through. A printed circuit board unit mounted on an electronic device includes a circuit board 2 and a front plate 4 supporting the circuit board 2.
And a rear face plate 5, a cooling control plate 8 attached to an end portion 2a of the circuit board 2 sandwiched between the front face plate 4 and the rear face plate 5, and controlling a flow of cold air to the circuit board 2, and the cooling control plate 8. The control plate 8 is configured to be pressed and supported from an arbitrary direction and to have a holder 7 attached to the front plate 4 and the rear plate 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printed board unit, and more particularly to a printed board unit mounted on an electronic device and cooled by cold air.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG.
In FIG. 0, a plurality of rows of printed board units 41 are mounted, and the printed board units 41 are slidably inserted by the guide board 51 of the electronic device 40.

Reference numeral 49 is a partition plate for partitioning each of the printed board units 41 inserted in the plurality of rows. The printed board unit 41 has a circuit board 42 on which an electronic component such as an LSI or a wiring pattern is formed, and a front board 43 is attached to the front surface of the circuit board 42.

Operating levers 48 for easily pulling out the printed board unit 41 from the electronic device 40 are attached to both ends of the front plate 43. By appropriately operating the operating levers 48, the printed board unit 41 is moved to the electronic device. Four
It is pulled from 0.

A rear face plate 44 is attached to the rear face of the circuit boards 42, and a connector 47 to be inserted into the back panel 50 of the electronic device 40 is attached to the rear face of the rear face plate 44.

A cover 45 is attached to the wall surface of the circuit board 42 to prevent cold air from wrapping around from another printed board unit. In order to firmly support the cover 45, a holder 46 and a rear plate 43 are provided. It is attached between the face plate 44.

For electronic devices constructed in this way,
Although not shown, a cooling fan for supplying cold air is provided on the downstream side of the electronic device, and by operating this cooling fan, cold air can be supplied to the printed board unit 41, and the printed board unit 41 can be supplied. Can be cooled.

[0008]

The printed circuit board unit is formed with a wiring pattern and electronic parts such as an LSI, a wiring pattern only, and parts such as resistors. There are some that do not need to be forcibly cooled because their calorific value is small.

In the conventional electronic equipment, all the cold air is allowed to uniformly pass through the printed board units in order to reduce the cost. Therefore, the cold air flowing in the electronic equipment naturally has a small air resistance. Therefore, there is a problem that it is impossible to cool the printed circuit board unit having a large air resistance on which heat-generating components such as LSI are not mounted.

In this state, it may be possible to increase the power of the cooling fan if cold air is passed through the printed board unit having a large air resistance. However, when the power of the cooling fan is increased, problems such as increased noise and increased power consumption occur.

Therefore, the present invention is based on the LS to be cooled originally.
The object is to improve the cooling efficiency by allowing the cool air to pass only through the printed board unit on which I and the like are mounted.

[0012]

SUMMARY OF THE INVENTION The above-described object is to provide a printed circuit board unit mounted on an electronic device in a circuit board 2
And a front plate 4 and a rear plate 5 that support the circuit board 2.
A cooling control plate 8 which is attached to the end portion 2a of the circuit board 2 sandwiched between the front plate 4 and the rear plate 5 and which controls the flow of cold air to the circuit board 2, and the cooling control plate 8. It can be achieved by a printed board unit characterized by including a holder 7 that is pressed and supported from an arbitrary direction and is attached to the front plate 4 and the rear plate 5.

[0013]

That is, according to the present invention, by controlling the flow of the cold air by the cooling control plate, it is possible to prevent the cold air from passing through the place where it is not necessary to cool it.
Therefore, cold air can be supplied to other printed circuit board units that need to be cooled.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a diagram showing an embodiment of the present invention.

FIG. 2 is a view showing the cooling control plate. FIG. 3 is a diagram showing another example of the cooling control plate. 1 and 2, the same reference numerals denote the same objects, and the cooling control plate 8 of FIG. 2 and the cooling control plate 10 of FIG. 3 correspond to each other.

In the present embodiment, the relationship with the electronic equipment is the same as that of the conventional example, and therefore its explanation is omitted and only the structure of the printed board unit will be explained. As shown in FIG. 1, in the printed board unit 1 of this embodiment, a front board 4 is attached to the front surface of a circuit board 2 and a rear board 5 is attached to the rear surface thereof, and the printed board unit 1 is attached to the front board 4. An operation lever 9 for easily pulling 1 out of the electronic device is attached.

On the rear surface of the rear plate 5, a connector 5 for inserting the circuit board 2 into a back panel of an electronic device (not shown).
Are formed. A cover 6 is attached to the side surface of the printed board unit 1 in the direction of the arrow in the figure to prevent the cold air from coming in from other printed board units, and a holder 7 described later is attached to the tip of the cover 6. A protrusion 6a that engages with is formed.

A cooling control plate 8 as shown in FIG. 2 having a groove 8a and a flat plate 8b which are fitted in the end 2a of the circuit board 2 between the front plate 4 and the rear plate 5 is shown. It is attached from the direction of the arrow.

2A is a top view of the cooling control plate 8, FIG. 2B is a side view of the cooling control plate 8, and FIG. 2C is a front view of the cooling control plate 8. In this example, the flat plate 8b of the cooling control plate 8 blocks cold air from the lower direction in the drawing.

The cooling control plate 8 is simply the end 2 of the circuit board 2.
Since it will easily fall off when it is fitted into a, the holder 7 is attached while pressing it from above the cooling control plate 8 to completely hold and fix the cooling control plate.

As the fixing structure, the cooling control plate 8 is fitted into the circuit board 2, and the protrusion 7b formed at the rear end portion of the holder 7 is inserted into the groove 5a of the rear face plate 5, and then the holder 7 is formed.
This is done by inserting a slidable lock claw 7a formed at the front end portion of the above into the groove 4a of the front plate 4.

The lock claw 7a can be easily slid by operating the operating portion 7d in the G direction. When the holder 7 is attached to the front plate 4 and the rear plate 5, the back side 7e of the holder 7 is fitted with the tip 6a of the cover 6, whereby the attachment of the cover 6 is fixed,
The holder 7 is fixed not only to the cooling control plate 8 but also to the circuit board 2 by fitting the groove 7c of the holder 7 into the groove 8a of the cooling control plate 8 and the end portion 2a of the circuit board 2, respectively.

The holder 7 has a plurality of frame-shaped bodies, and when it is necessary to pass cold air through the printed board unit (when cooling is required), the cooling control board 8 can be selectively removed. You can freely pass cold air.

In this embodiment, the cooling control plate 8 has been described as having the flat plate 8b as shown in FIG. 2 so as to completely block the passage of the cold air, but it is not limited to this. , The flat plate 1 as shown in the cooling control plate 10 of FIG.
You may provide the groove | channel 10c which some cold winds pass in 0b.

The size of the groove 10c is determined by how much cool air is passed through the printed board unit. As described above, according to the present embodiment, it is possible to block the cold air as necessary to prevent the cold air from passing through the printed board unit that does not need to be cooled, and prevent the cold air from passing. Since the configuration is a one-touch type, the configuration is simple and the cost can be reduced accordingly.

[0026]

As described above, according to the present invention, since the flow of cold air can be controlled as necessary, the cold air is not passed through the printed board unit that does not need to be cooled, and the LSI or the like is mounted accordingly. This has the effect of being able to sufficiently cool the printed board unit that needs to be cooled.

Since only the necessary printed board unit can be cooled, it is not necessary to prepare a fan having a large power as in the conventional case, and problems such as noise and large power consumption can be solved. it can.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention.

2A and 2B are views showing a cooling control plate, FIG. 2A is a top view thereof, FIG. 2B is a side view thereof, and FIG. 2C is a front view thereof.

3A and 3B are views showing another example of the cooling control plate, FIG. 3A is a top view thereof, and FIG. 3B is a perspective view thereof.

FIG. 4 is a diagram showing a conventional example.

[Explanation of symbols]

 1 printed board unit, 2 circuit board, 4 front plate, 5 rear plate, 6 cover, 7 holder, 8 cooling control plate,

Claims (2)

[Claims] 1. A printed circuit board unit mounted on an electronic device, comprising: a circuit board (2); a front plate (4) and a rear surface plate (5) for supporting the circuit board (2); and the front plate (4). ) And a rear plate (5), and a cooling control plate (8) attached to an end portion (2a) of the circuit board (2) for controlling the flow of cold air to the circuit board (2), A printed circuit board unit comprising: a holder (7) for supporting the cooling control plate (8) by pressing it from an arbitrary direction and attached to the front plate (4) and the rear plate (5). . 2. The printed circuit board unit according to claim 1, wherein the cooling control plate (10) has holes (10c) for adjusting the air flow rate.