JP2508703Y2 - Air supply duct - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air supply duct, and more particularly to an air supply duct configured to prevent air leakage due to an assembly error.

[0002]

2. Description of the Related Art For example, in a storage device configured to incorporate a magneto-optical disk device in a housing of electronic equipment, a power supply circuit and each circuit board are housed in the housing in addition to the magneto-optical disk device. The housing itself is also large. However, the magneto-optical disk device is relatively small and is mounted on the front side of the housing. Further, since the magneto-optical disk device generates heat by the recording / reproducing operation, it is necessary to blow air from the outside to cool it.

For this reason, an air supply fan is provided on the rear surface side of the housing so as not to interfere with other equipment to supply air to the magneto-optical disk device on the front surface side. An air supply duct is provided inside the housing so that the air flow from the air supply fan is supplied to the magneto-optical disk device.

Since this air supply duct is manufactured at low cost,
A thin metal plate is bent in a U shape, and the side plates are erected from both sides of the bottom plate. The air supply duct is attached between the bottom of the housing and the top plate and the upper substrate to form a flow path through which an air flow flows.

[0005]

However, in the air supply duct having the above structure, when the height position of the bottom portion of the housing and the height of the top plate or the upper substrate are deviated due to, for example, a processing error, the air supply duct is There is a problem that a gap is created between the upper end of the side plate and the top plate or the upper substrate of the housing, and air leaks to the surroundings from this gap. In this case, the air flow from the air supply fan diffuses into the housing and the flow rate of air supplied to the magneto-optical disk device decreases, so that the magneto-optical disk device cannot be cooled efficiently.

If the height of the side plate of the air supply duct made of sheet metal varies and the side plate comes into contact with the substrate, the side plate may come into contact with the electronic component soldered to the substrate and the electronic component may be peeled off. there were.

Therefore, an object of the present invention is to provide an air supply duct which solves the above problems.

[0008]

SUMMARY OF THE INVENTION According to the present invention, side plates are erected on both sides of a bottom plate, and upper ends of the side plates are brought into contact with a top plate or a substrate so that an air flow from an air supply fan is enclosed in a casing of an electronic device. In an air supply duct of an electronic device which forms a flow path leading to a heat generating element contained in the body, an elastically deformable bending portion is provided at an upper end of the side plate.

[0009]

By providing an elastically deformable bending portion at the upper end of the side plate of the air supply duct, the bending portion comes into contact with the upper top plate and the substrate, and the gap between the side plate and the upper top plate and the substrate disappears. Leakage can be prevented.

[0010]

1 to 3 show a recording / reproducing apparatus to which an embodiment of an air supply duct according to the present invention is applied.

In each drawing, a magneto-optical disk device (heating element) 2, a power supply circuit 3, circuit boards 4 and 5, and a power supply circuit 17 are housed in a housing 1 of the recording / reproducing apparatus. The magneto-optical disk device 2 is a precision device for high-density recording on a disk (not shown) and is sensitive to temperature changes.

The magneto-optical disk device 2 is a front surface 1a of a housing 1.
And the air supply unit 3 is provided on the rear surface 1b side of the housing 1. An air supply duct 6 that guides the air flow from the air supply unit 3 to the magneto-optical disk device 2 is arranged in the housing 1.

As shown in FIGS. 4 to 6, the air supply duct 6 is, for example, a thin plate formed of synthetic resin such as phenol resin (also called sumilite) excellent in mechanical strength and heat resistance in a U shape. Bend it. That is, the air supply duct 6 is formed by bending both sides of the bottom plate 6a upward to form side plates 6b, 6b.
An inclined surface 6d is provided on the bottom plate 6a on the air supply unit 3 side.

The bottom plate 6a and the inclined surface 6d are inclined on both sides so that the width of the bottom plate 6a and the inclined surface 6d become gradually larger as they move into the housing 1. Therefore, the side plates 6b and 6c on both sides are not the bottom plate 6a.
And is bent according to the shape of the inclined surface 6d. Further, four fixing portions 6e to 6h project on both sides of the bottom plate 6a.

[0015] each of the side plates _{6b (6b 1 ~6b 4),} 6c (6
c ₁ ~6c ₃₎ tongues on the upper end inclined to the inside of the (flexible portion) 7a to 7g are provided. The tongues 7a to 7g are elastically deformable so as to bend downward when pressed from above. Although the air supply duct 6 has a complicated shape according to the arrangement inside the housing 1, etc., it is easier to process than sheet metal because it is formed by bending a thin plate made of synthetic resin as described above. Since it is lightweight and easy to handle, it can be easily mounted in the housing 1 in the assembly process.

As shown in FIG. 8, the air supply unit 3 has a fan cover 8 attached to the rear surface 1b of the housing 1.
An air supply fan 9 and a fan filter 10 are housed inside. The fan filter 10 is formed by bending a filter paper into a bellows shape and can be removed from the upper opening 8a of the fan cover 8, so that it can be easily replaced. After the fan filter 10 is inserted through the upper opening 8a of the fan cover 8, the upper opening 8a is closed by the lid 11.

Next, the assembling work when the air supply duct 6 having the above structure is mounted in the housing 1 will be described.

First, the lower circuit board 4 is mounted in the housing 1. Then, the fixed portion 6e of the air supply duct 6
6 h is screwed to the bracket 16 above the circuit board 4. At this time, the tip of the inclined surface 6d of the air supply duct 6 projects rearward of the housing 1.

Next, the upper circuit board 5 is mounted on the bracket 16 via the spacer 17. At that time, the bottom surface of the circuit board 5 contacts the tongues 7d and 7e provided on the upper ends of the side plates 6b and 6c. The tongues 7d and 7e are the circuit board 5
It is pressed by and bends downward.

As a result, the circuit board 5 and the side plates 6b and 6c are
There is no gap between the upper end and the upper end, and air leakage from here is prevented. Since the tongues 7d and 7e are easily elastically deformed when pressed downward, the electronic components (not shown) soldered to the circuit board 5 are not peeled off.
Even if the tongues 7d and 7e contact the lower surface of the circuit board 5, the circuit board 5 is not damaged.

Then, the rear surface 1b is attached. The air supply unit 3 is attached to the rear surface 1b, the rear surface 1b is attached, the air supply fan 9 of the air supply unit 3 faces the rear side of the air supply duct 6, and The tip of the inclined surface 6d of the duct 6 is pressed into the housing 1 and bends in an arc shape.

Further, when the top plate 1c is attached, the lower surface of the top plate 1c contacts the tongue pieces 7a, 7b, 7g provided on the upper ends of the side plates 6b, 6c. Each tongue piece 7a, 7b, 7g
Is pressed by the top plate 1c and bends downward.

As a result, there is no gap between the top plate 1c and the upper ends of the side plates 6b and 6c, and air leakage from this is prevented.

Therefore, the air flow from the air supply fan 9 passes through the side plates 6b and 6c of the air supply duct 6, the inclined surface 6d, and the flow path 12 (see FIG. 2) defined by the circuit board 4. It is supplied to the magneto-optical disk device 2 through a flow path 13 (see FIG. 2) defined by the bottom plate 6a, side plates 6b and 6c of the air supply duct 6, and the top plate 1c. Therefore, the air supply fan 9
The tongue pieces 7a to 7g provided on the side plates 6b and 6c of the air supply duct 6 prevent the air flow from the inside from diffusing into the housing 1, and the magneto-optical disk device 2 can be cooled efficiently.

Further, as shown in FIG. 8, the air supply unit 3
In order to fix the fan filter 10 in the fan cover 8 attached to the rear surface 1b of the housing 1, the magic tape halves 14a and 14b are attached to the frame 15 of the fan filter 10 and the bottom portion 8b of the fan cover 8. You may make it easy to fix the filter 10 for fans by wearing it.

In this case, in order to facilitate the removal of the fan filter 10 in the fan cover 8, a hole 8c is formed in the bottom portion 8b of the fan cover 8.

In the above embodiment, the magneto-optical disk device 2 is used.
Although the recording / reproducing apparatus provided with is described as an example, the present invention is not limited to this, and the air supply duct may be provided in a housing that accommodates another device that easily generates heat.

Further, in the above embodiment, the tongues 7a to 7g are provided on the side plates 6b and 6c of the air supply duct 6, but the invention is not limited to this. For example, elastic members which can be elastically deformed at the upper ends of the side plates 6b and 6c. (Made of rubber, sponge, etc.) may be provided.

[0029]

As described above, since the air supply duct according to the present invention is provided with the elastically deformable bending portion at the upper end of the side plate, the bending portion comes into contact with the top plate and the substrate on the upper side plate. It is possible to eliminate the gap between the top plate and the substrate above. Therefore, it has features that air leakage from the gap between the top plate and the substrate can be prevented, and the heat generating portion in the housing can be efficiently cooled.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a recording / reproducing apparatus to which an embodiment of an air supply duct according to the present invention is applied.

FIG. 2 is a vertical sectional view of the recording / reproducing apparatus shown in FIG.

FIG. 3 is a rear view of the recording / reproducing apparatus shown in FIG.

FIG. 4 is a plan view of an air supply duct.

FIG. 5 is a right side view of the air supply duct.

FIG. 6 is a left side view of the air supply duct.

FIG. 7 is a rear view of the air supply duct.

FIG. 8 is an exploded perspective view of an air supply unit.

FIG. 9 is an exploded perspective view of a modified example of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Housing 2 Magneto-optical disk device 3 Air supply unit 4, 5 Circuit board 6 Air supply duct 7a-7g Tongue piece 8 Fan case 9 Fan 10 Fan filter

Claims (1)

(57) [Scope of utility model registration request] 1. A side plate is erected on both sides of the bottom plate, and on the side plate.
In an air supply duct for an electronic device, in which an end portion is brought into contact with a top plate or a substrate to form a flow path for guiding an air flow from an air supply fan to a heating element incorporated in a housing of the electronic device . , An electric wire provided with an elastically deformable bending portion at the upper end of the side plate.
Air supply duct for child devices .