JP3144172B2 - Cooling body with crimping fins - Google Patents

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 pressed against 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 into a groove of a base by crimping. FIG. 3 is a front view of a conventional example. In the figure, a plurality of grooves 1a whose inner surfaces facing each other are parallel are provided on the side opposite to the surface on which the heat source of the base 1 made of a heat conductive material such as an aluminum alloy is mounted. One end of a rib 2 made of a heat conductive material is inserted into the groove 1a and an arrow P is drawn from both sides of the groove 1a.
Press and crimp as shown. The support plate 34 is fixed to the side plate 3 fixed to both sides of the base 1 and parallel to the rib 2, and the other end of the rib 2 is held by the support groove 34 a of the support plate 34. The support plate 34 is used in common with the base 1 and is made of an aluminum alloy. The support groove 34a has the same shape as the groove 1a, and the opposing inner surfaces are parallel to each other. The other end is held by a small gap without crimping.

[0003]

In the above-mentioned prior art, one end of the rib 2 is crimped by crimping, but the pitch of the other ends of the plurality of ribs 2 is not accurate. For this reason, the support plate 3
It is very difficult to insert all the other ends of the ribs 2 into the four support grooves 34a in a uniform manner. This is especially true when the cooling body is large and the number of ribs 2 is large.

SUMMARY OF THE INVENTION An object of the present invention is to provide a cooling body having crimping fins for simplifying the operation of holding the other ends of a number of ribs crimped by crimping one end to a base by a support groove of a support plate. It is in.

[0005]

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

[0006]

According to the present invention, since the support groove of the support plate is widened, one end of the rib is pressed and caulked, and even if the pitch of the other ends of the plurality of ribs is not accurate, the support plate is provided with a plurality of ribs. It is easy to insert all the other ends of the ribs into the support grooves in a uniform manner. It is particularly advantageous when the cooling body is large and the number of ribs is large. If the support plate is formed of a synthetic resin, the whole becomes lightweight.

[0007]

FIG. 1 is a front view of a first embodiment, and FIG. 2 is a front view of a second embodiment. In the prior art and each figure, the components denoted by the same reference numerals have approximately the same functions, and duplicate explanations may be omitted. is there. In FIG. 1, on a side opposite to a surface on which a heat source of a base 1 made of a heat conductive material such as an aluminum alloy is mounted,
A plurality of grooves 1a whose inner surfaces facing each other are parallel are provided. This groove 1a
Is inserted into one end of a rib 2 made of a heat conductive material and crimped as shown by an arrow P from both sides of the groove 1a. A support plate 4 is fixed to a side plate 3 fixed to both sides of the base 1 and parallel to the rib 2, and the other end of the rib 2 is held by a support groove 4 a of the support plate 4.

The feature of the embodiment is that the support groove 4 of the support plate 4
a has a special shape. The support groove 4a is formed so as to extend in a partial circular shape toward the other end of the rib 2. The continuous plurality of support grooves 4a have a waveform or the like. Since the support groove 4a is wide, one end of the rib 2 is crimped and caulked. Even if the pitch of the other end of the plurality of ribs 2 is not accurate, the support plate 4
It is easy to insert all the other ends of the ribs 2 into the support grooves 4a. It is particularly advantageous when the cooling body is large and the number of ribs is large.

In the second embodiment shown in FIG.
Are formed in a trapezoidal shape toward the other end of the rib 2. As in 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 simple manner is simple. The support groove 4b may have a V-shape instead of a trapezoidal shape, and a plurality of continuous V-shaped support grooves have a saw-tooth shape. In any of the embodiments, 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 fins of the present invention, since the supporting groove of the supporting plate is wide, one end of the rib is crimped and the other end of the plurality of ribs is pitched. Although it is not accurate, there is an effect that the operation of inserting all the other ends of the ribs into the support grooves of the support plate in a simple manner is simple, which is particularly advantageous when the cooling body is large and the number of ribs is large. If the support plate is formed of a synthetic resin, there is an effect that the overall weight is reduced.

[Brief description of the drawings]

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

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

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

[Explanation of symbols]

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

Claims (2)

(57) [Claims] 1. A plurality of grooves whose opposite inner surfaces are parallel to each other on a side opposite to a surface on which a heat source of a base made of a heat conductive material is mounted,
One end of a rib made of a heat conductive material is inserted into this groove and crimped from both sides of the groove, and a support plate is fixed to both sides of the base and is fixed to a side plate parallel to the rib. In a cooling body provided with a crimping fin for inserting and holding the other end of the rib, the support groove is formed by extending in a partially circular, trapezoidal or V-shaped shape toward the other end of the rib. Cooling body with crimping fins. 2. The cooling body according to claim 1, wherein the support plate is formed of a synthetic resin.