JP2518664Y2 - Radiation fin mounting structure - Google Patents

Description

[Detailed description of the device]

 [Purpose of device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure for a radiation fin used for cooling a heat generating component.

[0002]

2. Description of the Related Art A radiation fin used for cooling a heat-generating component mounted on a plug-in type printed wiring board is designed to radiate heat so that the printed wiring board can be freely inserted into and removed from the equipment casing. In some cases, the fin may be detachably attached to the heat-generating component.

3 and 4 show a conventional heat dissipating fin mounting structure of this type.

An IC (heat generating component) 3 is mounted on a plug-in type printed wiring board 2 mounted on a housing 1 of an electronic device. The IC 3 is composed of an IC body 4 and a heat radiating plate 5, and the heat radiating fin 7 is attached near the opening 10 of the housing 1 with its base surface 8 pressed against the heat radiating plate 5. ing. The mounting structure of the radiation fin 7 has the following configuration.

Both sides of the radiation fin 7 on both sides in the longitudinal direction
Each of the holes 11 and 11 is provided with a hole 12, and the "U" -shaped arms 14 of the support fittings 13 and 13 arranged at both ends of the hole 12, respectively.
The shaft portion 16 of the male screw 15 screwed in is inserted into the hole portion 12.

On the other hand, a pair of holding metal fittings 18, 18 are screwed to the periphery of the opening 10 of the housing 1. Retaining bracket 1
8 and 18 are provided with a shaft 20 of a male screw 19. The support fittings 13 and 13 are held by the shaft 20 so as to be slidable in the direction of approaching and separating from the IC 3, and the base surface 8 of the heat radiation fin 7 is supported.
Are positioned to face IC3. Also,
A spring 22 is provided on the shaft 20, and the respective support fittings 13, 13 are constantly pressed toward the IC 3.

According to this conventional mounting structure, the support fittings 13, 13 for supporting both ends of the radiation fin 7 are biased toward the IC 3 by the spring 22, and each support fitting 13 is attached to the radiation fin 7. Since the radiating fins 7 are held with a degree of freedom with respect to the inclination in the longitudinal direction,
It can be pressed in parallel with the heat dissipation surface of the IC 3.

However, the radiating fins 7 are attached to the support fittings 13 and 13 with the base surface 8 inclined with respect to the radiating plate portion 5 of the IC 3 in the width direction of the radiating fins 7 (direction of both side surfaces 11 and 11). Then, the radiation fin 7 is pressed against the IC 3 with the base surface 8 inclined with respect to the radiation plate portion 5,
It was difficult to surely bring the base surface 8 into close contact with the IC 3. Further, since the support fitting 13 rotates about the male screw 15, the pressing force of the spring 22 is not reliably transmitted to the heat radiation fin 7, and the heat radiation fin 7 may not be sufficiently pressed against the IC 3.

[0009]

As described above, in the above heat dissipation structure, it is difficult to closely attach the base surface to the heat-generating component because there is no degree of freedom in the width direction of the heat dissipation fins.
The support metal was rotated by the urging force of the spring, and the urging force could not be entirely transmitted to the IC, so good heat dissipation could not be achieved.

The present invention has been made in view of the above-mentioned conventional drawbacks, and an object of the present invention is to provide a mounting structure of a heat radiation fin which can be sufficiently pressed and closely contacted with a heat generating component. [Device configuration]

[0011]

According to the present invention, in a mounting structure of a heat radiating fin in which a heat radiating fin has a base surface closely attached to a heat generating component mounted on a substrate and the heat radiating fin is mounted, the heat radiating fin mounting structure is orthogonal to the base surface. A first support tool that rotatably supports one of the opposite end surfaces of the heat radiation fin via a support shaft, and a second support tool that supports the other end of the heat release fin via a support shaft in a rotatable manner; The first base in a state where the base surface faces the heat-generating component and is slidable in a direction in which the first and second support members approach and separate from the heat-generating component.
And a holder for holding the second support, and a first biasing provided between the first support and the holder for biasing the first support toward the heat-generating component. And a second urging means that is provided between the second supporting tool and the holding tool and urges the second supporting tool toward the heat-generating component.

[0012]

In the present invention, one of the opposing end faces of the heat radiation fin is rotatably supported by the first support through the support shaft, and the other end is rotatably supported by the second support through the support shaft. Supported by
Moreover, since the first and second support members are respectively pressed toward the heat-generating component by the biasing means, both ends of the heat radiation fin are pressed against the heat-generating component by the first and second support members, Further, even if one of the edge portions of the edge portion of the heat radiation fin which is inclined with respect to the spindle and tilts with respect to the heat generating component and intersects the end surface of the heat radiation fin comes into contact with the heat generating component first, it opposes the one edge portion. The other edge is rotated by the support shaft in the direction of coming into contact with the heat generating component.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to FIGS. FIG. 1 is a plan view for explaining the mounting structure of the radiation fin, and FIG. 2 is a sectional view taken along the line AA of FIG.

As in the conventional example, an IC 3 which is a heat-generating component is mounted on a plug-in type printed wiring board (board) 2 mounted on a housing 1 of an electronic device.
Further, the IC 3 is composed of an IC body 4 and a heat dissipation plate 5, and the heat dissipation fin 30 according to the present invention has an opening portion of the housing 1 with its base surface 31 pressed against the heat dissipation plate 5. It is installed near 10. The mounting structure of the heat radiation fin 30 will be described below.

Both end faces 33a, 33 in the longitudinal direction of the radiation fin 30
Each b is provided with a hole 34. One end face 33
A shaft portion (support shaft) 38 of a male screw 37 screwed into an "L" -shaped support fitting (first support tool) 36a is inserted into the hole 34 of a. Similarly, in the hole 34 of the other end face 33b,
The shaft portion 38 of the male screw 37 screwed into the "L" -shaped support fitting (second support tool) 36b is inserted.

On the other hand, a pair of holding metal fittings (holding tools) 40a, 40b are screwed to the periphery of the opening 10 of the housing 1. The support fittings 36a and 36b are slidably held by the shaft portion 43 of the male screw 42 provided on the holding fittings 40a and 40b in the direction of approaching and separating from the IC 3, and the heat radiation fins.
The base surface 31 of 30 is positioned so as to face the IC 3. A spring (first urging means) 45a is provided between the holding metal fitting 40a and the support metal fitting 36a, and a spring (second urging means) is similarly provided between the holding metal fitting 40b and the support metal fitting 36b. ) 45b, and the support fittings 36a, 36b are pressed in the direction of the arrow shown in FIG. 1 by these springs 45a, 45b.

Next, the operation of the above mounting structure will be described.

Both end faces 33a and 33b of the radiation fin 30 are supported by support fittings 36a and 36b, respectively.
36b is constantly pressed toward IC3 by the action of springs 45a and 45b. Therefore, as shown in FIG.
The end of the radiation fin 30 on the 33a side is attached to the IC by the support metal fitting 36a.
3 is pressed against the end face 33b side of the heat dissipation fin 30
Since the ends of the heat radiating fins 30 are pressed against the IC 3 by the support fittings 36b, both ends of the heat radiation fin 30 in the longitudinal direction are pressed against the IC 3 without fail. Further, the support fittings 36a, 36b support both end faces 33a, 33b in a rotatable state via a support shaft 38. Therefore, as shown by the alternate long and short dash line in FIG.
The heat dissipating fins 30 are supported in a state of being inclined with respect to the base surface 31.
Even if one of the edge portions 47a comes into contact with the IC 3 first, the other edge portion 47b opposite to the one edge portion 47a is moved in the arrow direction by the pressing force of the springs 45a and 45b acting via the support shaft 38. The edge 47b is rotated and surely contacts the IC3.
Therefore, the base surface 31 of the radiating fin 30 surely comes into close contact with the IC 3, and is pressed against the IC 3 by an appropriate pressing force of the springs 45a and 45b.

In this embodiment, the holders 40a and 40b are attached to the housing 1 to hold the supports 36a and 36b, but the present invention is not limited to this, and the housing 1 itself is used as a holder. Alternatively, the support may be held directly on the housing 1.

[0020]

As described above, according to the present invention, both ends of the heat radiation fin are pressed against the heat generation component by the first and second support members biased toward the heat generation component, and the heat radiation fin generates heat. Even if one edge of the edges intersecting the end face of the heat radiation fin and tilting against the component comes into contact with the heat-generating component first, the other edge facing this one edge generates heat due to the action of the spindle. It is rotated in the direction of abutting the part. Therefore, the heat radiation fin can be brought into close contact with the heat generating component with an appropriate pressing force.

[Brief description of drawings]

FIG. 1 is a plan view illustrating a mounting structure of a radiation fin of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a plan view illustrating a conventional radiation fin mounting structure.

FIG. 4 is a side view of the mounting structure.

[Explanation of symbols]

 2 ... Substrate 3 ... Heat-generating component 30 ... Radiating fin 31 ... Base surface 33a ... One end surface 33b ... Other end surface 36a ... First support tool 36b ... Second support tool 38 ... Spindles 40a, 40b ... Holding tool 45a ... first biasing means 45b ... second biasing means

Claims (1)

(57) [Scope of utility model registration request] 1. In a mounting structure of a radiation fin, wherein a radiation fin has a base surface closely attached to a heat-generating component mounted on a substrate so that the radiation fin is mounted. A first support tool that rotatably supports one through a support shaft, a second support tool that rotatably supports the other through a support shaft, and the base surface of the heat radiation fin is the heat generating component. A holder that holds the first and second supports in a state of facing each other and slidable in a direction in which the first and second supports approach and separate from the heat generating component; First urging means provided between a supporting tool and the holding tool for urging the first supporting tool toward the heat generating component, and provided between the second supporting tool and the holding tool. Second biasing means for biasing the second support tool toward the heat generating component And a mounting structure for a radiation fin.