JPH0766574A - Cooling body provided with compression caulking fin - Google Patents

Abstract

PURPOSE:To simplify an operation for holding one end of a number of ribs whose other end is compressed and caulked to a base by a supporting groove of a supporting board. CONSTITUTION:A plurality of grooves 1a whose opposite inner surfaces are parallel are provided to an opposite side of a surface whereto a heat source of a base 1 is attached. One end of a rib 2 is inserted to the groove 1a and caulked by compressing it as shown by an arrow P from both sides of the groove 1a. A supporting board 4 is fixed to a side board 3 which is fixed to both sides of the base 1 and is parallel to the rib 2. The other end of the rib 2 is held by a supporting groove 4a of the supporting board 4. The supporting groove 4a is formed to enlarge to a partial disc shape toward the other end of the rib 2. Since the supporting groove 4a is enlarged, all of the other end of the rib 2 can be readily inserted to the supporting groove 4a of the supporting board 4 at once even if the pitch of the other end of a plurality of the ribs 2 is not accurate. It is especially advantageous when a cooling body is large and the rib is large in number.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling body in which a fin is crimped and caulked in a groove of a base for cooling a heat source such as a power module of an electronic device.

[0002]

2. Description of the Related Art In addition to forming a base and fins by a die casting method or an extrusion method, there is a method of crimping a fin by crimping it into a groove of the base. FIG. 3 is a front view of a conventional example. In the figure, a plurality of grooves 1a whose inner surfaces are parallel to each other are provided on the side opposite to the surface on which the heat source is mounted on the base 1 made of a heat conductive material such as aluminum alloy. Insert one end of the rib 2 made of a heat conductive material into the groove 1a, and insert an arrow P from both sides of the groove 1a.
Press and crimp as shown. The support plate 34 is fixed to the side plates 3 that are fixed to both sides of the base 1 and are parallel to the ribs 2, and the other ends of the ribs 2 are held by the support grooves 34a of the support plate 34. The support plate 34 is also used as the base 1, and is made of an aluminum alloy. The support groove 34a has the same shape as the groove 1a, and the inner surfaces facing each other are parallel, but one end is crimped and caulked. Hold the other end with a minute gap without crimping.

[0003]

In the above-mentioned conventional example, one end of the rib 2 is crimped and crimped, but the pitch of the other ends of the ribs 2 is not accurate. Therefore, the support plate 3
It is very difficult to insert all the other ends of the ribs 2 into the supporting grooves 34a of No. 4 so as to be aligned. Especially when the cooling body is large and the number of ribs 2 is large.

An object of the present invention is to provide a cooling body provided with crimping and crimping fins which facilitates the work of holding the other ends of a large number of ribs crimped by crimping one end to a base in the supporting groove of the supporting plate. Especially.

[0005]

A cooling body having crimping and crimping fins according to the present invention is provided with a plurality of grooves whose inner surfaces facing each other are parallel to each other on the side opposite to the surface on which a heat source of a base made of a heat conductive material is mounted. Insert one end of the rib made of heat conductive material into the groove, crimp it from both sides of the groove and crimp it, fix the support plate to the side plate that is fixed to both sides of the base and is parallel to the rib, and in the support groove of this support plate. In a cooling body including a crimping crimping fin that inserts and holds the other end of the rib, the support groove is formed by expanding the support groove toward the other end of the rib in a partial circle shape, a trapezoidal shape, or a V shape. May be formed of synthetic resin.

[0006]

According to the present invention, since the supporting groove of the supporting plate is wide, one end of the rib is crimped and crimped, and the pitch of the other ends of the plurality of ribs is not accurate, but the supporting plate of the supporting plate is not accurate. It is easy to insert all the other ends of the ribs into the supporting groove so that they are aligned. It is particularly advantageous when the cooling body is large and the number of ribs is large. If the support plate is made of synthetic resin, the overall weight will be lighter.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a front view of the first embodiment, and FIG. 2 is a front view of the second embodiment. In the conventional example and in each drawing, those denoted by the same reference numerals have approximately the same function, and duplicate description may be omitted. is there. In FIG. 1, on the side opposite to the surface on which the heat source of the base 1 made of a heat conductive material such as aluminum alloy is mounted,
A plurality of grooves 1a having parallel inner surfaces facing each other are provided. This groove 1a
One end of the rib 2 made of a heat conductive material is inserted into and is crimped from both sides of the groove 1a as shown by an arrow P. The support plate 4 is fixed to the side plates 3 that are fixed to both sides of the base 1 and are parallel to the ribs 2, and the other ends of the ribs 2 are held by the support grooves 4 a of the support plate 4.

As a feature of the embodiment, the supporting groove 4 of the supporting plate 4 is provided.
a has a special shape. The support groove 4a is formed by partially expanding the rib 2 toward the other end of the rib 2. The plurality of continuous support grooves 4a have a corrugated shape or the like. Since the supporting groove 4a is wide, one end of the rib 2 is crimped and crimped, and although the pitch of the other ends of the plurality of ribs 2 is not accurate, the supporting plate 4a
It is easy to insert all the other ends of the ribs 2 into the supporting grooves 4a by aligning them. It is particularly advantageous when the cooling body is large and the number of ribs is large.

In the second embodiment shown in FIG. 2, the supporting groove 4b
Is formed in a trapezoidal shape toward the other end of the rib 2. Similar to the first embodiment, the work of inserting all the other ends of the ribs 2 into the support grooves 4b of the support plate 4 in a uniform manner is simple. The supporting groove 4b may be V-shaped instead of the trapezoidal shape, and a plurality of continuous V-shaped supporting grooves have a sawtooth shape. In any of the examples, if the support plate is made of synthetic resin, the weight is reduced and there is no adverse effect on cooling.

[0010]

According to the cooling body having the crimping and crimping fins of the present invention, since the supporting groove of the supporting plate is wide, one end of the rib is crimped and crimped, and the pitch of the other ends of the plurality of ribs is increased. Although it is not accurate, there is an effect that the operation of inserting all the other ends of the ribs into the support groove of the support plate in a uniform manner is simple, and it is particularly advantageous when the cooling body is large and the number of ribs is large. If the support plate is made of synthetic resin, it has the effect of reducing the overall weight.

[Brief description of drawings]

FIG. 1 is a front view of the first embodiment.

FIG. 2 is a front view of the second embodiment.

FIG. 3 is a front view of a conventional example.

[Explanation of symbols]

 1 Base 1a Groove 2 Rib 3 Side plate 4 Support plate 4a Support groove 4b Support groove

Claims (2)

[Claims] 1. A plurality of grooves whose inner surfaces are parallel to each other are provided on the opposite side of a surface of a base made of a heat conductive material to which a heat source is attached,
Insert one end of a rib made of heat conductive material into this groove, crimp it from both sides of the groove and crimp it, fix the support plate to the side plate fixed to both sides of the base and parallel to the rib, and the support groove of this support plate In a cooling body including a crimping crimping fin that inserts and holds the other end of the rib into the rib, the support groove is formed by widening in a partial circle shape, a trapezoidal shape, or a V shape toward the other end of the rib. Cooling body with crimping and crimping fins. 2. A cooling body having crimping crimping fins according to claim 1, wherein the support plate is made of synthetic resin.