JP2000040778A - Heat sink - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat sink that is easily assembled and enhanced in latitude of design. SOLUTION: A heat sink 10 is equipped with a main body 1, which is L- shaped in cross section and composed of a first member 1a and a second member 1b, linear or intermittently linear ribs 7a to 7d, that are formed by blanking and provided to the main body 1, a fin 3 provided with a blanked part that is fitted into the ribs 7a to 7d, and a caulking part that fixes the fin 3 to the main body 1 by crushing the ribs 7a to 7d, into a state where the ribs 7a to 7d are fitted in the blanked part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat sink, and more particularly to a heat sink that can be easily assembled and has a high degree of design freedom.

[0002]

2. Description of the Related Art A conventional heat sink includes a fin and a main body to which the fin is attached. A round half-punch is formed in the main body. The round half-punching is to punch a half of the thickness of a certain portion of the main body with a round jig, thereby forming a plurality of round rib-shaped protrusions. On the other hand, the fin is provided with a plurality of holes into which such a rib-shaped protrusion can be inserted. After inserting the rib-shaped projections into these holes, the projections are crushed to fix the fins to the main body. Thus, a heat sink was manufactured.

[0003]

In such a conventional heat sink, a portion of the main body to which the fin is attached is a round half-punched portion. It is necessary to match the position with the hole. Because of this difficulty in alignment, assembling the heat sink was troublesome.

In the above-described mounting method in which the rib-shaped round protrusion is inserted into the hole of the fin and fixed by caulking, unless the position of the rib-shaped protrusion provided on the body is changed, It is not possible to freely change the position of the fin to be attached to the fin. For this reason, the design of the heat sink has been restricted.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a heat sink which can be easily assembled and has a high degree of design freedom.

[0006]

In order to solve the above-mentioned problems, a heat sink according to the present invention comprises a main body, and a linear or intermittent linear rib formed by half-punching the main body. A fin portion having a punched portion to be fitted into the rib; and a caulking portion for fixing the fin portion to the main body portion by crushing the rib with the rib fitted in the punched portion. It is characterized by doing.

In the above-mentioned heat sink, a straight or intermittent straight rib is provided on the main body in order to fix the fin to the main body by the caulking portion. For this reason, alignment at the time of attaching a fin part to a main part becomes easy.
Therefore, the heat sink can be easily assembled. In addition, since a linear or intermittent linear rib is provided on the main body and a punched-out portion is provided on the fin to be fitted into the rib, the degree of freedom of the position at which the fin is mounted is also increased. Therefore, the degree of freedom in designing the heat sink can be increased.

Preferably, the surface of the main body to which the fin is fixed has a flat portion. Preferably, the fins are attached to two surfaces of the main body. Further, it is preferable that the fin density of the fin portion is not uniform.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a heat sink according to an embodiment of the present invention. This heat sink is used for electric products.

The heat sink 10 includes an aluminum main body 1 having an L-shaped cross section, and a fin 3 attached to the main body 1. This fin portion 3
It is formed by repeatedly folding a plate-shaped member many times. The fin unit 3 has a plurality of fins,
The distance between the fins adjacent to each other is constant.

FIG. 2A is a front view of the heat sink shown in FIG. 1, FIG. 2B is a plan view of the heat sink shown in FIG. 1, and FIG. 2C is shown in FIG. It is a side view of a heat sink. FIG. 3 is a sectional view taken along the line III-II shown in FIG.
It is sectional drawing along the I line.

As shown in FIGS. 2A to 2C, the main body 1 includes a plate-shaped first member 1a and a plate-shaped second member 1b. Four linear half-punches 5a to 5d are formed in the first member 1a. These four half-punches 5a to 5d are arranged in parallel with each other and at the same interval, and have the same length. In addition, as shown in FIG. 3, the half blankings 5a to 5d have a concave shape having a quadrangular cross section. On the surface of the first member 1a opposite to the surface on which the half-punches 5a to 5d are formed, four ribs (convex portions) 7a to 7d are provided at positions corresponding to the respective half-punches 5a to 5d. Is formed. These ribs 7a to 7d are arranged at the same positions as the half-punches 5a to 5d.

FIG. 4 is an enlarged perspective view showing a state in which fins are attached to the main body of the heat sink shown in FIG. FIG. 5 is an enlarged cross-sectional view illustrating a method of attaching a fin to the main body.

As shown in FIG. 4, a punched portion 6 into which the ribs 7a to 7d can be fitted is formed on the side of the fin portion 3 attached to the main body 1.
Then, the ribs 7a to 7d are fitted into the punched portion 6, and the fin portion 3 is fixed to the main body 1 by crushing and crimping the rib as shown in FIG.

According to the above embodiment, the main body 1 is provided with linear ribs 7a to 7d in parallel with each other in order to fix the fin 3 to the main body 1 by caulking 8. For this reason, there is no need to align the projections with the holes of the fins when attaching the fins to the main body, such as a conventional heat sink. Therefore, the heat sink can be easily assembled.

The main body 1 has linear ribs 7a to 7d.
Are provided in parallel with each other, and the fin portion 3 is provided with a punched portion 6 corresponding to the ribs 7a to 7d. Therefore, when the punched portion of the fin portion 3 before being fixed by caulking is fitted in the ribs 7a to 7d, The portion 3 can be slid, and the degree of freedom of the position at which the fin portion is mounted increases. Therefore, it is possible to design a heat sink having a higher degree of freedom than in the past.

FIG. 6 is a perspective view showing a first modification of the heat sink according to the embodiment of the present invention. The same parts as those in FIG. 1 are denoted by the same reference numerals, and only different parts will be described.

On a part of the surface of the first member 1a where the ribs 7a to 7e are formed, a flat portion 9 where no rib is formed is secured.

The same effects as those of the embodiment can be obtained in the first modification.

FIG. 7 is a perspective view showing a second modification of the heat sink according to the embodiment of the present invention. The same parts as those in FIG. 1 are denoted by the same reference numerals, and only different parts will be described.

The fins 3 are attached to both surfaces of the first member 1a by caulking.

In the second modification, the same effect as that of the embodiment can be obtained.

FIG. 8 is a perspective view showing a third modification of the heat sink according to the embodiment of the present invention. The same parts as those in FIG. 1 are denoted by the same reference numerals, and only different parts will be described.

The density of the fins 4a in the fin portion 4 is not constant but non-uniform. In other words, the fins 4 include the fins 4a having an irregular distance from each other, and the heat sink can correspond to the fins 4 having such a shape.

In the third modified example, the same effect as that of the embodiment can be obtained.

[0026]

As described above, according to the present invention, a linear or intermittent linear rib is provided on the main body in order to fix the fin to the main body by the caulking portion. Therefore, a heat sink that can be easily assembled and has a high degree of freedom in design can be provided.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a heat sink according to an embodiment of the present invention.

2 (a) is a front view of the heat sink shown in FIG. 1, FIG. 2 (b) is a plan view of the heat sink shown in FIG. 1, and FIG. It is a side view of the heat sink shown.

FIG. 3 is a sectional view taken along line III-III shown in FIG.

FIG. 4 is an enlarged perspective view showing a state in which fins are attached to a main body of the heat sink shown in FIG. 1;

FIG. 5 is an enlarged sectional view showing a method of attaching a fin to a main body.

FIG. 6 shows a first example of the heat sink according to the embodiment of the present invention.
It is a perspective view which shows the modification of.

FIG. 7 shows a second example of the heat sink according to the embodiment of the present invention.
It is a perspective view which shows the modification of.

FIG. 8 shows a third example of the heat sink according to the embodiment of the present invention.
It is a perspective view which shows the modification of.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Main body part, 1a ... First member, 1b ... Second member, 3, 4
… Fin part, 4a… fin, 5a-5d… half punching,
6: punched portion, 7a to 7d: rib (convex portion), 8: caulking, 9: flat portion, 10: heat sink.

Claims (4)

[Claims] 1. A main body, a linear or intermittent linear rib formed in the main body by half-punching, a fin formed with a punched portion to be fitted into the rib, and the punching And a caulking portion for fixing the fin portion to the main body portion by crushing the rib with the rib fitted in the portion. 2. The heat sink according to claim 1, wherein the surface of the main body to which the fin is fixed has a flat portion. 3. The heat sink according to claim 1, wherein the fins are attached to two surfaces of the main body. 4. The heat sink according to claim 1, wherein the fin density of the fin portion is not uniform.