JPH0334950Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a heat sink for an electric device. More specifically, a fin mounting plate is provided upright on a metal substrate, a plurality of fins are attached to the fin mounting plate, and heat generating components such as transistors, diodes, and thyristors are attached to the metal substrate to generate heat. The present invention relates to a heat radiator for an electric element that radiates heat generated inside a component.

[Conventional technology]

Heat radiators for electric elements that have a plurality of fins on a metal substrate, heat generating components such as transistors are attached to the metal substrate, and radiate heat generated from the heat generating components have been provided in various structures. has been done. For example, it is known that a large number of fins are fitted onto a heat conduction shaft at appropriate intervals and fixed by brazing or by tightening a stay (see Utility Model Application Publication No. 51951/1985). 1978-
(See Publication No. 196850).

However, the conventional product described above has the disadvantage that it is not easy to determine the spacing between the fins and a special jig must be used when attaching the fins to the fin mounting plate. Also,
The problem was that the contact area between the heat conduction shaft and the fins was small, and the heat dissipation efficiency was also poor.

[The problem that the idea attempts to solve]

The present invention eliminates the above-mentioned drawbacks of the conventional technology, and includes a fin mounting plate provided upright on a metal substrate with an expanding piece having a bulge and a cut groove. The fin mounting plate has a cutout hole that almost matches the cross-sectional outer circumference shape of the fin mounting plate, and by fitting each fin into the notch position on the outer periphery of the fin mounting plate and expanding the expansion pieces, the fin mounting plate To provide a heat radiator for an electric element in which the fins and the fins are closely fixed, the heat radiation efficiency is good, resonance noise is not generated, and the assembly can be easily performed.

[Means to solve the problem]

The present invention is a heat sink for an electric element, in which a fin mounting plate is provided upright on a metal substrate on which a heat-generating component is mounted, and a plurality of fins are provided on the fin mounting plate. Expansion pieces with cut grooves formed at intervals are provided in the longitudinal direction. On the other hand, the plurality of fins are provided with notched holes that substantially match the cross-sectional outer peripheral shape of the fin mounting plate. The fins are fitted into the cut grooves on the outer periphery of the fin mounting plate, and the fins are mounted by expanding the expandable pieces of the fin mounting plate.

[Effect of invention]

The heat sink for electric elements of the present invention has a fin mounting plate erected on a metal substrate, a plurality of fins are attached to the fin attachment plate, heat generating parts such as transistors are attached to the metal substrate, Dissipates heat from heat generating parts. The fin mounting plate is provided with a swollen portion and an expanding piece with a cut groove formed therein, and a fin with a cutout hole that almost matches the cross-sectional outer circumferential shape of the fin mounting plate is attached to the fin mounting plate. Since the outer periphery of the fins is fitted into the notched groove and the expanding pieces of the fin mounting plate are expanded, the fins and the fin mounting plate are in sufficient contact, resulting in good thermal conductivity. Further, since the fins and the fin mounting plate are in a fitted state and in contact with each other, the fins are not unnecessarily pulled out from the fin mounting plate without using a jig, and the fins can be easily positioned. Further, when the expansion piece of the fin mounting plate is expanded, a passage is formed by the expansion piece and the notch hole of the fin, and the refrigerant comes to pass through the inside thereof.

〔Example〕

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

FIG. 1 is an exploded perspective view, FIG. 2 is a sectional view taken along the line of FIG. 1, FIG. 3 is a sectional view taken along the line of FIG. 1, and FIG. 4 is a perspective view of a metal substrate showing another embodiment. .

As shown in FIGS. 1 to 3, the heat sink for electric elements according to the present invention has a heat-generating component 2 attached to the bottom surface of a metal substrate 1, and a metal substrate 1 mounted in the center of the top surface of the metal substrate 1. A fin mounting plate 3 is provided upright along the longitudinal direction. The metal substrate 1 and the fin mounting plate 3 are made of a heat conductive material such as aluminum alloy or copper, and are integrally formed by extrusion molding. Moreover, this fin mounting plate 3 has a plurality of fins 4.
A bulge 5 and an expansion piece 6 are provided along the longitudinal direction of the holder. Swelling part 5
exemplifies a hollow cylindrical shape. Although the expanding piece 6 is shown as having a substantially Y-shaped cross section and having cut grooves 7 formed at appropriate intervals, the present invention is not limited thereto. If it can be expanded and comes into contact with a part of the notch hole 8 of the fin 4 when expanded,
Although not shown, the expansion pieces may have other cross-sectional shapes. Further, the cut grooves 7 are formed at intervals between the fins 4 to be attached, and the fins 4 are located at this position.
is inserted. On the other hand, like the metal substrate 1 and the fin mounting plate 3, the fin 4 is made of a thermally conductive material such as aluminum alloy or copper, or iron, and has a cross-sectional outer circumference of the fin mounting plate 3 in its center. A cutout hole 8 that almost matches the shape is bored. This fin 4 is placed from one end of the fin mounting plate 3 to its outer periphery.
Moreover, it is inserted into the position of the cut groove 7. At this time, there is no need for a spacer to keep the distance between the fins 4 constant. In this way, the fins 4 are fitted into the fin mounting plate 3, and the expansion pieces 6 of the fin mounting plate 3 are expanded.

Incidentally, in order to more firmly attach the fins 4, brazing, welding, or any other means may be used.
Furthermore, in order to expand the expansion piece 6 of the fin attachment plate 3, the expansion piece 6 may be bent outward.

FIG. 4 shows another embodiment in which the fin mounting plate 3 is provided with a hollow diamond-shaped bulge 5 and an expanding piece 6 with a Y-shaped cross section on the upper edge thereof. However, the present invention is not limited to the above. For example, if the fin mounting plate is provided with a bulge and an expanding piece, and the fin is provided with a cutout hole that approximately matches the cross-sectional outer circumference shape of the fin mounting plate, the shapes and sizes of the fins, etc. I don't care.

In the present invention as described above, a heat generating component 2 such as a transistor is attached to a metal substrate 1. The heat generated from the heat generating component 2 is sequentially transmitted to the metal substrate 1, the fin mounting plate 3, and the fin 4, and is radiated. The fin mounting plate 3 erected on the metal substrate 1 and the fins 4 fitted into the fin mounting plate 3 are in sufficient contact and have good thermal conductivity, and the fins 4 are detached from the fin mounting plate 3. The fins 4 can be easily positioned and attached without having to do so. In addition, the fin mounting plate 3
The refrigerant passes through the expansion piece 6 and the notch hole 8 of the fin 4.

[Effect of idea]

As described above, according to the present invention, the fin mounting plate and the fins are in sufficient contact and in close contact, resulting in good thermal conductivity, and furthermore, the refrigerant is allowed to flow into the expansion piece of the fin mounting plate and the notch hole of the fin. It is a heat radiator for electric elements that has extremely good heat radiation efficiency. Furthermore, since the fins and the fin mounting plate are in a fitted state and in contact with each other, the fins will not be pulled out from the fin mounting plate without using a jig, and positioning of the fins will be easy, so impact, etc. Even if the fins do not come off from the fin mounting plate, the above-mentioned close contact state can be maintained, and assembly is easy.
This is a heatsink for electric elements that does not generate resonance noise.

[Brief explanation of the drawing]

The drawings show an embodiment of the heat sink for electric elements according to the present invention, in which FIG. 1 is an exploded perspective view, FIG. 2 is a sectional view taken along the line of FIG. 1, and FIG. 3 is a sectional view taken along the line of FIG. 1.
FIG. 4 is a perspective view of a metal substrate showing another embodiment. In the figure, 1 is a metal substrate, 2 is a heat generating component, 3 is a fin mounting plate, 4 is a fin, 5 is a bulge, 6 is an expansion piece, 7 is a cut groove, and 8 is a notch hole.

Claims (1)

[Scope of utility model registration request] In a heat sink for an electric element, in which a fin mounting plate is provided upright on a metal substrate on which a heat generating component is mounted, and a plurality of fins are provided on the fin mounting plate, the fin mounting plate has a bulge and cut grooves at predetermined intervals. The plurality of fins are provided with notched holes that approximately match the cross-sectional outer circumference shape of the fin mounting plate, and the fins are positioned at the cut grooves on the outer periphery of the fin mounting plate. A heat radiator for an electric element, which is formed by fitting the fin mounting plate and expanding the expansion pieces of the fin mounting plate.