JP2000165074A - Heat dissipation unit of mpu for personal computer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance heat dissipation performance by disposing a heat sink having a plurality of fins formed integrally on one side of a heat dissipating plate by cutting and raising it in the housing of a personal computer. SOLUTION: A case 2 for MPU(microprocessor unit) is arranged in the housing of a personal computer and a duct type heat dissipation unit 4 is fixed to the outer surface of an aluminum conductive metal plate 3 constituting one side wall part of the case 2. The heat dissipation unit 4 is constructed by arranging a plurality of concave fins 6 on the upper surface of an aluminum extrusion molded heat dissipating plate 5 by cutting and raising it, combining the heat dissipating plate 5 with a duct forming fin cover 7 to surround the fins 6 and then stopping them from the outside by means of a substantially U-shaped spring steel clip 8 having a fixing hook 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for a personal computer, particularly preferably a desktop personal computer, and radiates heat generated from an MPU (microprocessor unit) disposed in a housing of the personal computer to the outside of the housing. It relates to a heat dissipation device.

[0002]

2. Description of the Related Art Generally, in a desktop personal computer, it is necessary to radiate heat generated from an MPU which is a component of the personal computer to the outside of a housing.
In particular, in the field of personal computers, in recent years, multifunctionality and processing speed have been remarkably increased, and as a result, the output of the MPU has been increased, and the heat generation has been significantly increased.

A conventional heat sink is one in which active fins are attached to a heat dissipation board made of an extruded material, a heat dissipation board made of die casting, or a heat dissipation board made by forging, and a heat sink is connected to a case containing an MPU. The mainstream was screwing and riveting.

[0004]

However, such a conventional heat radiator requires a large number of assembling steps, requires torque control, and has problems in cost and quality.

Recently, a heat sink and an MPU
Although the so-called clipping is increasing as a coupling means with the case in which is stored, in the case of fan cooling, when connecting the ventilation duct, the heat sink, and the MPU storage case,
If cooling air leaks from the duct, the specified amount of cooling air cannot be sent to the heat sink, causing a problem of insufficient performance.Therefore, conventionally, the ventilation duct and heat sink, and the MPU storage case and heat sink They have been joined together separately or in anticipation of some cooling air leakage.

As a method of connecting the heat sink and the MPU storage case by such clipping, for example, a combination of a heat sink and a mounting member described in JP-A-7-153879, and an electric insulation described in JP-A-7-183679 are disclosed. There are known a clamp assembly provided with a sex fastener and a heat sink assembly described in Japanese Patent Application Laid-Open No. H8-204078, but in each case, the heat sink is stopped using a clip attached from the side of the heat radiation fin, In addition, there has been a problem that the joining operation using the clip is not one-touch and is relatively troublesome.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art, and to sufficiently radiate the heat generated from the MPU in the housing to the outside of the housing. Therefore, an object of the present invention is to provide a heat radiating device for an MPU for a personal computer, which can be manufactured at a very low cost because it requires less heat.

[0008]

A heat radiation device for an MPU for a personal computer according to the invention of claim 1 is provided in a housing of the personal computer, and is provided with an MPU.
1. A heat radiating device for radiating heat generated from a heat radiating substrate, comprising: a heat radiating substrate; and a plurality of heat radiating fins formed integrally on one surface of the heat radiating substrate.

According to a second aspect of the present invention, there is provided a heat radiation device for an MPU for a personal computer.
The heat dissipating substrate is made of extruded aluminum material, and a plurality of heat dissipating fins formed at intervals in the extrusion direction of the heat dissipating substrate. Are provided in a plurality of rows.

According to a third aspect of the present invention, there is provided a heat radiating device for a personal computer MPU according to the first or second aspect, wherein the MPU is housed in an MPU housing case.
A connection terminal provided on one side edge of the MPU storage case is connected to the motherboard, and a heat dissipation device is attached to the MPU storage case.

According to a fourth aspect of the present invention, there is provided a heat radiation device for an MPU for a personal computer.
The MPU storage case is provided with a heat conductive metal plate constituting one side wall portion, and a surface of the heat radiating substrate on which the heat radiating fins are not formed is in contact with the heat conductive metal plate.

[0012]

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

In this specification, the left side of FIG. 1 is referred to as front and the opposite side is referred to as rear, and the upper and lower sides and left and right sides of FIG. Further, in the following description of this specification, the term “aluminum” includes an aluminum alloy in addition to pure aluminum.

FIG. 1 is a schematic overall view of a desktop personal computer provided with a heat dissipation device according to the present invention.

In the figure, a heat radiating device according to the present invention transfers heat generated from an MPU (not shown) of an MPU storage case (2) arranged in a housing (1) of a desktop personal computer to the outside of the housing (1). To dissipate heat.

The MPU storage case (2) is a box-shaped cartridge type, and has an outer surface of an aluminum heat conductive metal plate (3) constituting one side wall of the MPU storage case (2).
A duct-type heat radiating unit (4) having a built-in heat radiating fin (6) can be attached (see FIG. 3).

A connection terminal (not shown) is provided on the left side edge of the MPU storage case (2), and the connection terminal is connected to a motherboard (34) arranged in the housing (1). It has become so.

The duct type heat radiating unit (4) is connected to a rear end (30a) of a main duct (30) provided in the housing (1) in a communicating manner. After the air in the housing (1) is passed through the radiating fins (6) to the radiating openings (33) of the housing front side wall (1a) connected to the front end (30b) of the main duct (30), the radiating openings ( One fan to send out of housing (1) from 33)
(31) is provided. At the lower part of the rear wall of the housing (1), a ventilation port (32) for taking in cooling air is provided.

FIGS. 2 to 4 show the first embodiment of the present invention in detail. In the figure, a duct-type heat radiating unit (4) includes a heat radiating substrate (5) made of an extruded aluminum material,
Combined with the radiating fin (6), which has a concave-arc shape that is recessed to the left when viewed from the front and is provided on the upper surface of the radiating substrate (5), and the radiating substrate (5) so as to surround the radiating fin (6) A fin cover (7) made of aluminum, which is approximately inverted when viewed from the front, and an installation that is inserted into the insertion holes (10) (10) of the heat conductive metal plate (3) of the MPU storage case (2) Hook
(9) A U-shaped spring steel clip (8) having a combination of (9) and a U-shaped spring board viewed from the front, which holds the radiator board (5) and the fin cover (7) together from outside. Things.

A pair of concave grooves (13) and (13) for fitting the lower horizontal portion (8a) of the clip (8) are formed on the lower surface of the extruded aluminum-made heat dissipation board (5). It is provided so as to extend in the extrusion direction (left-right direction). These grooves (13)
(13) is for preventing displacement of the clips (8) and (8) (lateral displacement).

A plurality of heat dissipating fins (6) are formed on the upper surface of the heat dissipating substrate (5) at intervals in the extrusion direction (left and right directions) of the heat dissipating substrate (5) and extend in the left and right direction. A plurality of fin rows are provided side by side in a direction perpendicular to the concave grooves (13) (13) (a direction perpendicular to the extrusion direction). According to such a radiation fin (6), the fin
The pitch can be freely set, the fins (6) can be arranged at narrow intervals, and the heat radiation efficiency is excellent.

On the other hand, when the fins of the heat radiation substrate (5) are formed integrally with the heat radiation substrate (5) in the extrusion direction so as to face in the same direction as the extrusion direction, the fin spacing is reduced. Therefore, the heat radiation efficiency is not good.

The fin cover (7) is composed of a flat left side wall (7a) and an upper side wall (7b) connected at right angles to each other, and a radiation fin (6) for preventing a so-called air path in the duct. )
And a right-side wall (7c) formed in a concave arc shape recessed to the left as viewed from the front, and a lower end portion of the right wall portion (7c) of the concave arc shape is provided on the right side of the heat radiation board (5). A thin strip-shaped connecting edge (7d) is formed to be brought into contact with the surface.

The clip (8) is formed integrally by using a spring steel plate so as to be generally U-shaped when viewed from the front, and is inserted into the concave groove (13) of the heat radiation board (5). It has a base portion (8a), and arm portions (8b) (8b) extending upward from the left and right ends thereof. Each of the clip base portion (8a) and the arm portions (8b) (8b) has a U-shaped cross section having reinforcing wall portions (11) (11) on both front and rear sides. The depth of the concave groove (13) opened downward on the lower surface of the heat dissipation board (5) is such that the base portion (8a) including the front and rear reinforcing wall portions (11) and (11) of the clip (8) enters. , Having a depth that is greater than its height.

The clip base portion (8a) is provided with mounting hooks (9) (9) cut and raised from the base portion (8a) at intervals in the left-right direction. Each mounting hook (9) has a rising base (9a) and a laterally U-shaped tip bent portion (9b),
It has a so-called spring property. Also, bend at the tip (9b) (9
b) is bent outward, so-called outward opening tightening. The base portion (8a) has two notches (12) and (12) formed by cutting and raising the two mounting hooks (9) and (9). Each mounting hook
The height of the rising base (9a) (9a) of (9) is from the bottom of the clip base (8a) to the heat conductive metal plate (3) of the MPU storage case (2).
Slightly lower than the height up to the inner surface.

Also, both left and right arm portions (8b) of the clip (8)
At the end of (8b), a plate-shaped holding part that extends inward
(8c) and (8c) are integrally formed. A step is provided at the center of each holding part (8c), and these holding parts (8c) (8c)
Thereby, the upper side wall (7b) of the fin cover (7), and furthermore, the tip of the heat radiation fin (6) group are firmly pressed. Then, the base part (8a) including the front and rear reinforcing wall parts (11) and (11) of the clip (8) enters the concave groove (13) on the lower surface of the heat dissipation board (5) and the bottom surface of the concave groove (13). It is made to adhere.

In the above, the duct type heat radiating unit (4)
The fin cover (7), which is substantially inverted U-shaped when viewed from the front, is combined with the radiator board (5) having the radiator fins (6) so as to surround the radiator fins (6) group, and then attached. A pair of clips (8) and (8) having hooks (9) and (9) are put on the radiating board (5) and the fin cover (7) in a combined state,
Hold these from the outside. At this time, each clip
The base portion (8a) of (8) fits into the concave groove (13) on the lower surface of the heat radiating substrate (5), thereby preventing the clip (8) from being displaced (laterally displaced) with respect to the heat radiating substrate (5). The left and right side walls (8a) and (8a) of the fin cover (7) can be sandwiched and pressed by the left and right arms (8b) and (8b) of each clip (8), and the pressing section (8c The upper wall (7b) of the fin cover (7), and thus the tip of the heat radiation fins (6) group, can be pressed by the) (8c). At this time, make sure that the holding angle of the holding parts (8c) (8c) of the clip (8) is
(6) Hold the tip of the group firmly.

The left side wall (7a) of the fin cover (7)
The bottom edge of the heat dissipation board (5) is brought into contact with the left side of the heat dissipation board (5), and the connection edge (7d) at the tip of the right side wall (7c) is
Since the right side surface of (5) is brought into surface contact, air leakage can be prevented.

Further, since the clip (8) is formed by integral molding, the labor for processing can be saved and the number of parts can be reduced.

In the first embodiment, the clip
The base portion (8a) of (8) has reinforcing wall portions (11) and (11) on both front and rear sides, and has a large strength.
Pressing parts (8c) (8) of the left and right arms (8b) (8b) of the clip (8)
c) is formed in a plate shape, has relatively low strength, and is designed to prevent deformation on the base portion (8a) side.

The duct type heat radiating unit (4) having the above structure is
To attach to one side of the heat conductive metal plate (3) constituting one side wall of the MPU storage case (2), insert the clips (8) into the insertion holes (10) (10) of the heat conductive metal plate (3). The mounting hooks (9) and (9) of the base (8a) may be inserted.

Then, the rising bases (9a) and (9a) and the bent portions (9b) and (9b) of the mounting hooks (9) are once pushed inward against the elasticity of the material, and are raised. Base (9a) (9
a) swings inward, and the bent ends (9b) and (9b)
When passing through the insertion hole (10) of (3), the rising base (9a) (9a) and the bent end portions (9b) (9b) return to the original state by the elastic force, and the bent end portion (9b ) (9b) is MPU storage case
The inside of (2) is hooked on the periphery of the insertion hole (10) of the heat conductive metal plate (3), and the duct type heat radiating unit (4) is attached to the heat conductive metal plate (3) of the MPU storage case (2). Things.

Here, the height of the rising bases (9a) and (9a) of the mounting hooks (9) of the base (8a) of the clip (8) is set so that the MPU storage case ( 2) Since the height is slightly shorter than the height to the inner surface of the heat conductive metal plate (3) on the side, the tip bent part (9b) (9b) of the mounting hook (9)
Is the insertion hole of the heat conductive metal plate (3) of the MPU storage case (2)
(10) When it enters the inside, it is securely hooked on one side of the insertion hole (10) rim, and the MPU storage case
(2) Side heat conductive metal plate (3) and duct type heat dissipation unit (4)
This can prevent poor contact with the heat dissipation board (5) (see FIG. 3).

In the above, the heat radiation opening in the side wall (1a) of the housing (1) of the desktop personal computer.
When the fan (31) provided in (33) is operated, low-temperature air outside the housing (1) is sucked through the ventilation port (32).
This low-temperature air is guided to the radiation fins (6) in the duct-type radiation unit (4), and the MPU in the MPU storage case (2).
Is released through the radiating fins (6),
The air is heated. This heated air passes through the main duct (30) and through the heat dissipation opening (33) in the housing side wall (1a) to the housing.
(3) It is quickly discharged outside. Therefore, the heat radiation performance through the heat radiation fins (6) is excellent.

Since the radiating fin (6) has its width direction directed to the front and back sides of the paper of FIG. 3, the wind flows along the radiating fin (6) in the duct type unit (4).

The duct type heat radiation unit of the first embodiment.
According to (4), clip (8) with mounting hooks (9) (9)
Thereby, the duct-type heat radiating unit (4) can be attached or detached very easily and firmly with one touch on one side of the heat conductive metal plate (3) constituting one side wall of the MPU storage case (2), Very convenient. In addition to being able to prevent leakage of cooling air and paths, cooling performance is excellent, and in addition to the radiating board (5) with radiating fins (6) that constitute the radiating unit (4),
The covers (7) can be firmly combined with each other.

The above-mentioned fin cover for forming the duct is provided.
(7) is made of aluminum, but may be made of resin. The clip (8) is made of spring steel,
This may be made of a resin, a resin-coated metal plate, or the like.

FIGS. 5 and 6 show a second embodiment of the present invention.

Here, the difference from the first embodiment is that a hook (9) for attaching a substantially U-shaped clip (8) made of spring steel is used.
The tip bent portion (9b) (9b) of (9) has a V-shape in the horizontal direction, and is opposite to the case of the first embodiment, and is bent inward, so-called inward opening tightening. There is in the point.

Since the other points of the second embodiment are the same as those of the first embodiment, the same parts are denoted by the same reference numerals in the drawings.

FIGS. 7 and 8 show a third embodiment of the present invention.

Here, the difference from the first embodiment is that a heat-dissipating board (5) having a heat-dissipating fin (6) of a duct-type heat-dissipating unit (4) and a substantially inverted U-shaped duct as viewed from the front are formed. In the method of connecting the fin cover (7) and the inverted U-shaped clip (17) as viewed from the front.

That is, a dovetail groove (internally enlarged concave groove) (18) is horizontally formed by extrusion molding on the lower surface of a heat dissipation board (5) made of an extruded aluminum material, and is provided on both left and right end faces of the heat dissipation board (5). Narrow concave grooves (14) (14) are provided horizontally by cutting.

The hooks (9) and (9) for mounting the inverted U-shaped clip (17) shown in the figure have their tip bent portions (9b) and (9b) bent outward, so-called outward opening. It has been closed. In addition, on the front and rear side edges of the base (17a) of the inverted U-shaped clip (17), overhangs (19) and (19) are provided, respectively, which are engaged with the both sides of the opening of the dovetail groove (18). I have.

The lower edge of the left and right side walls (7a) and (7c) of the duct forming fin cover (7) is provided with the concave groove (1) of the heat radiation board (5).
4) Engagement projections (15) and (15) to be fitted into (14) are provided in an inwardly projecting shape, respectively, and the projection (1) for preventing displacement.
6) and (16) are provided in an inwardly projecting shape so as to project inwardly from the engagement projections (15) and (15).

The clip (1) is inserted into the dovetail groove (18) of the heat dissipation board (5).
The base (17a) of 7) is fitted, and the front and rear
(19) The (19) is engaged with both side edges of the dovetail groove (18). Then, a fin cover (7) is combined with the radiating board (5) so as to surround the radiating fin (6), and the engaging protrusions (7a) and (7c) of the left and right side walls (7a) and (7c) of the fin cover (7) are formed. 15) and (15) are fitted into the concave grooves (14) and (14) of the heat dissipation board (5), and the protrusions (16) and (16) for preventing displacement are provided with dovetail grooves on the lower surface of the heat dissipation board (5). (18)
It is inserted in the left and right ends.

The duct type heat radiating unit (4) having the above configuration is
To attach to one side of the heat conductive metal plate (3) constituting one side wall of the MPU storage case (2), insert the clip (17) into the insertion holes (10) (10) of the heat conductive metal plate (3). The attachment hooks (9) and (9) only need to be inserted, and both attachment hooks (9) and (9) have a so-called spring property, which can be easily attached or detached with one touch.

According to the third embodiment, the heat dissipation board (5)
The inverted U-shaped clip (17) can be easily attached by the dovetail groove (18) of the fin cover (7). By being inserted into both right and left ends of the dovetail groove (18), escape of the inverted U-shaped clip (17) is prevented. At the same time, the displacement of the fin cover (7) can be prevented.

The left and right side walls (7) of the fin cover (7)
a) The engaging projections (15) and (15) of (7c) are the concave grooves (14) of the heat dissipation board (5).
The fin cover (7) is inserted into (14).
Can be prevented and air leakage can be prevented.

Since the other points of the third embodiment are the same as those of the first embodiment, the same parts are denoted by the same reference numerals in the drawings.

FIGS. 9 and 10 show a fourth embodiment of the present invention. Here, the difference from the third embodiment is that the hook for mounting the inverted U-shaped clip (17) is provided.
(9) Contrary to the case of the third embodiment, the distal bent portions (9b) and (9b) of (9) are bent inward, so-called inward opening tightening. .

Further, a plurality of radiating fins formed in a cut-and-raised shape at an interval in the left-right direction on the upper surface of the radiating substrate (5).
Five rows of fins composed of (6) are provided side by side in the front-rear direction, and among the radiation fins (6) of the adjacent rows, in the gap between the radiation fins (6) of one row, The fin pitches of the adjacent rows are set so that the radiation fins (6) of the other row are located, so that the wind sufficiently contacts the fins (6) of all the rows. Thereby, the heat exchange performance is improved.

Since the other points of the fourth embodiment are the same as those of the third embodiment, the same parts are denoted by the same reference numerals in the drawings.

FIGS. 11 and 12 show a fifth embodiment of the present invention.

Here, the difference from the first embodiment is that a heat-dissipating board (5) having a heat-dissipating fin (6) of a duct-type heat-dissipating unit (4) and a duct-forming fin cover (7) are provided. ,
It is a method of coupling with a substantially inverted U-shaped spring steel clip (21) as viewed from the front.

That is, a substantially inverted U-shaped clip insertion gap portion (22) is horizontally provided between adjacent rows before and after the radiating fins (6) of the extruded aluminum material radiating substrate (5). A pair of left and right through-holes (23) (23) is provided in a portion of the heat dissipation board (5) corresponding to the gap (22). In addition,
The extruding direction of the heat dissipation board (5) is the left and right direction, and the heat dissipation board (5)
A gap (22) between rows of fins (6)
In order to form the fins, it is only necessary to provide a thick-walled portion for fin standing at a position corresponding to the fin standing surface of the extruded shaped material heat dissipation substrate (5).

On the other hand, a notch (24) is formed at the lower edge of the left and right side walls (7a) (7c) of the duct forming fin cover (7).
(25) is formed.

Inwardly bent portions (21a) and (21a) are respectively provided near the left and right end portions of the substantially inverted U-shaped clip (21), and the MPU is connected to the tip of the inwardly bent portions (21a) and (21a). Hooks (9) and (9) for attachment to the storage case (2) are provided respectively.

Each mounting hook (9) has a rising base (9a) and a bent end (9b), and has a so-called spring property. Further, the distal bent portions (9b) (9b) are bent outward, so-called outer opening fastening. In addition,
The height of the rising base (9a) (9a) of each mounting hook (9) is
The height is slightly shorter than the height from the upper surface of the heat dissipation board (5) to the inner surface of the heat conductive metal plate (3) on the MPU storage case (2) side.
The left and right sides (21) of the substantially inverted U-shaped clip (21)
b) Fin cover (7) by (21b) and upper side (21c)
Is held from the outside.

The fin cover (7) is combined with the heat dissipation board (5), and the substantially inverted U-shaped clip (2) is attached to the fin cover (7).
1) is fitted, and the inwardly folded portions (21a) (21a) pass through the notches (24) (25) of the left and right side walls (7a) (7c) of the duct forming fin cover (7). It is fitted into the gap (22) of the heat dissipation board (5). The mounting hooks (9) (9) at both ends of the substantially inverted U-shaped clip (21) are inserted through the through holes (23) (23) of the heat radiation board (5). When the substantially inverted U-shaped clip (21) is fitted over the duct forming fin cover (7), the inwardly bent portions (21a) and (21a) are cut out of the fin cover (7). Since the fin cover (7) is passed through (24) and (25), the fin cover (7) can be prevented from being displaced with respect to the heat dissipation board (5) and fixed.

The duct type heat radiating unit (4) having the above structure is
To attach to one side of the heat conductive metal plate (3) constituting one side wall of the MPU storage case (2), insert each of the substantially inverted U-shaped holes into the insertion holes (10) (10) of the heat conductive metal plate (3). The mounting hooks (9) and (9) of the clip (21) only need to be inserted, and both mounting hooks (9) and (9) have spring properties, which can be easily attached or removed with one touch. .

According to the heat radiating device of the fifth embodiment of the present invention, since the heat radiating fins (6) of the heat radiating substrate (5) are formed in a cut-and-raised shape, the rows of the heat radiating fins (6) are arranged. It is very easy to form a gap (22) between them.

FIGS. 13 and 14 show a sixth embodiment of the present invention.

Here, the difference from the first embodiment is that the heat radiation board (5) having the heat radiation fins (6) of the duct heat radiation unit (4) and the duct forming fin cover (7) ,
It is a method of coupling with an inverted U-shaped clip (26) when viewed from the front made of spring steel.

That is, a fin cover for forming a duct
At the end of the left and right side walls (7a) and (7c) of (7),
Cover fixing projections (27) (27) inserted into both ends of the gap (22) between the rows of (6) are provided in an inwardly projecting shape, respectively.

An inverted U-shaped clip (26) is fitted into the gap (22) of the heat radiating board (5), and mounting hooks at both ends thereof are attached.
(9) and (9) are inserted through the through holes (23) and (23) of the heat dissipation board (5). In addition, the inverted U-shaped clip to the heat dissipation board (5)
The attachment of (26), for example, by joining with an adhesive,
Alternatively, it is performed by fixing with screws.

Then, the fin cover (7) is attached to the heat radiation board (5).
Is combined with the left and right side walls of the fin cover (7).
(7a) The engaging projections (15) (15) of (7c) are fitted into the concave grooves (14) (14) on both left and right sides of the heat dissipation board (5), so that the fin cover (7) Can be prevented, and air leakage can be prevented. At the same time,
The cover fixing protrusions (27) and (27) are fitted into the gaps (22) between the rows of the parallel radiating fins (6) of the heat radiating board (5), and the cover fixing protrusions (27). The fin cover (7) is firmly attached to the heat radiating substrate (5) by pressing the fin cover (7) against the upper surface of the heat radiating substrate (5).

Note that the duct type heat radiating unit having the above-described structure is used.
To attach (4) to one side of the heat conductive metal plate (3) constituting one side wall of the MPU storage case (2), the heat conductive metal plate (3)
Insert the mounting hooks (9) and (9) of each inverted U-shaped clip (26) into the insertion holes (10) and (10).
Has a spring property and can be easily attached or detached with a single touch.

FIG. 15 shows a seventh embodiment of the present invention.

Here, the difference from the sixth embodiment is that the clip (28) is of the so-called open leg pin type with a detent projection.

Here, the pin-shaped clip (28) is made of, for example, a synthetic resin, and has a circular head (28a), which is integrally provided on the lower surface thereof and has a detent projection (29) at the tip. It has a plurality of legs (28b), has a substantially arrow-shaped cross section, and has a tapered outer surface of the detent projection (29). leg
A gap is provided between the (28b) so as to be able to swing inward of the leg (28b).

On the other hand, a heat dissipation substrate made of an extruded aluminum material
The pair of through-holes (23) and (23) of (5) is for inserting the plurality of legs (28b) of the pin-shaped clip (28).

Pin-shaped clip (28) for heat dissipation board (5)
After fixing the pins (28b) with a plurality of detents (29) of the pin-shaped clip (28) into the through holes (23) (23) on the heatsink board (5) side, This is performed by joining the lower surface of the head (28a) of (28) to the upper surface of the heat dissipation board (5) using, for example, an adhesive.

Then, the duct type heat radiating unit (4) is
Heat conductive metal plate forming one side wall of PU storage case (2)
To attach to one side of (3), insert a pin-shaped clip (2) protruding from the heat dissipation board (5) into the insertion hole (10) of the heat conductive metal plate (3).
What is necessary is just to insert the front-end | tip part with the detent convex part (29) of several leg parts (28b) of 8).

Then, the distal end of the leg (28b) is once pushed inward against the elastic force of the synthetic resin material by the tapered outer surface of the detent projection (29), and the detent projection (29) is formed. 29) The leg (28b) swings inward, and the insertion hole of the heat conductive metal plate (3)
When passing through (10), the leg (28b) returns to its original state by the elastic force, and the detent projection (29) is moved to the MPU storage case (2).
Hooks around the insertion hole (10) of the heat-conducting metal plate (3) inside the, and the duct-type heat-dissipating unit (4) is easily attached to the heat-conducting metal plate (3) of the MPU storage case (2) with one touch It is something that can be done.

The pin-type clip is easy to mount on the heat radiating board (5).
Because it is made of synthetic resin, it can be obtained at very low cost.

Since the other points of the seventh embodiment are the same as those of the sixth embodiment, the same parts are denoted by the same reference numerals in the drawings.

[0078]

According to the first aspect of the present invention, there is provided a heat radiation device.
Since it has a heat-dissipating substrate with one flat surface and a plurality of heat-dissipating fins that are cut and raised integrally on the other surface of the heat-dissipating substrate, a larger number of heat-dissipating fins are required compared to conventional products. Thus, the heat generated from the MPU in the housing can be sufficiently radiated to the outside of the housing, and the heat radiation performance is excellent.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a schematic overall view of a desktop personal computer provided with a heat dissipation device according to the present invention.

FIG. 2 is a perspective view showing a state before the combination of the heat dissipation device and the MPU storage case according to the first embodiment of the present invention.

FIG. 3 is an enlarged horizontal sectional view of the heat radiating device of FIG. 2;

FIG. 4 is an exploded perspective view of the heat dissipation device of FIG.

FIG. 5 is an enlarged horizontal sectional view of a heat dissipation device according to a second embodiment of the present invention.

FIG. 6 is an exploded perspective view of the heat dissipation device of FIG.

FIG. 7 is an enlarged horizontal sectional view of a heat dissipation device according to a third embodiment of the present invention.

FIG. 8 is an exploded perspective view of the heat dissipation device of FIG.

FIG. 9 is an enlarged horizontal sectional view of a heat dissipation device according to a fourth embodiment of the present invention.

FIG. 10 is an exploded perspective view of the heat dissipation device of FIG.

FIG. 11 is an enlarged horizontal sectional view of a heat dissipation device according to a fifth embodiment of the present invention.

FIG. 12 is an exploded perspective view of the heat dissipation device of FIG.

FIG. 13 is an enlarged horizontal sectional view of a heat dissipation device according to a sixth embodiment of the present invention.

FIG. 14 is an exploded perspective view of the heat dissipation device of FIG.

FIG. 15 is an enlarged horizontal sectional view of a heat dissipation device according to a seventh embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Housing 2 MPU storage case 5 Heat dissipation board 6 Heat dissipation fin

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Masaaki Munekawa 6,224 Kaiyamacho, Sakai City Showa Aluminum Co., Ltd. (72) Inventor Masaharu Tochigi 6,224 Kaiyamacho Sakai City, Showa Aluminum Co., Ltd. 72) Inventor Yuichi Furukawa, 6224, Kaiyama-cho, Sakai City Showa Aluminum Co., Ltd. (72) Inventor Keiichiro Ota 6, 224, Kaiyamacho, Sakai City, Showa Aluminum Co., Ltd.

Claims (4)

[Claims] 1. A heat radiating device provided in a housing of a personal computer and radiating heat generated from an MPU, comprising: a heat radiating substrate; and a plurality of heat radiating portions integrally formed in a cut-and-raised shape on one surface of the heat radiating substrate. A radiator for an MPU for a personal computer comprising a fin. 2. The heat dissipating substrate is made of an extruded aluminum material, and includes a plurality of heat dissipating fins formed at intervals in the extrusion direction of the heat dissipating substrate. 2. The heat radiating device for an MPU for a personal computer according to claim 1, wherein the heat radiating device is provided in a plurality of rows arranged in a direction perpendicular to the MPU. 3. The MPU is stored in an MPU storage case, a connection terminal provided on one side edge of the MPU storage case is connected to a motherboard, and a heat dissipation device is mounted on the MPU storage case. 3. A heat radiating device for an MPU for a personal computer according to claim 1. 4. The MPU storage case includes a heat conductive metal plate forming one side wall of the MPU storage case, and a surface of the heat radiating substrate on which the heat radiating fins are not formed is in contact with the heat conductive metal plate. Item 4. A heat dissipation device for an MPU for a personal computer according to Item 3.