JPH0883989A - Heat-dissipating device - Google Patents

Abstract

PURPOSE: To obtain a heat-dissipating device whose heat-dissipating efficiency and operating efficiency are enhanced, which reduces the cost of a metal mold and whose manufacturing cost is reduced. CONSTITUTION: A heat-dissipating device is provided with a plurality of fins 10, 12 which are installed side by side on a base 1 and with a plurality of protruding parts 11 which are installed so as to protrude on the surface side of the respective fins 10, 12 by a press working operation and whose tip comes into contact with the rear surface of the fins on the front side. Positions of the respective protruding parts 11 for the adjacent fins 10, 12 are made different.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat dissipation device used for heat dissipation of electronic coolers, electronic parts, and heat generation measures of switchboards and the like.

[0002]

2. Description of the Related Art A conventional heat radiating device of this type has, for example, a structure shown in FIG. In the figure, 1 is a base, 2
Are a plurality of fins on the base 1, and are formed in a comb shape integrally with the base 1 by extrusion.

Next, another conventional heat dissipation device has a structure shown in FIG. In the figure, 3 is a plurality of insertion grooves formed in the base 1 at equal intervals, 4 is a plate-shaped fin in which the lower part is inserted into the insertion groove 3 and is erected, and 5 is placed on the upper part of the fin 4. The holding jig 6 is a plurality of positioning grooves formed on the lower surface of the holding jig 5, and the upper portion of the fin 4 is inserted into the positioning groove 6 to hold and position the fins 4. The lower part of 4 is fixed to the base 1 by vacuum brazing solder.

Next, still another conventional heat dissipation device has a structure shown in FIG. In the figure, 7 is a fin formed by extrusion, having a protrusion 8 in the center, and the protrusion 8 of the fin 7 is placed on the base 1 in a state of contacting the center of the adjacent fin 7. The fins 7 are arranged side by side and each fin 7 is positioned. Reference numeral 9 denotes a holding jig that is placed in contact with the upper surface of each fin 7, and the holding jig 9 holds down each fin 7, and the lower portion of each fin 7 is placed on the base 1 by ultrasonic soldering. It is fixed.

[0005]

In the case of the conventional apparatus shown in FIG. 5, since an extrusion die is required, the die cost is high,
There is a problem that the manufacturing cost increases, and the fin pitch cannot be reduced due to the insufficient strength of the extrusion die as an extrusion condition, and the heat dissipation efficiency is low.

Further, in the case of the apparatus shown in FIG. 6, the plate-shaped fin 4 is used.
The lower part of the fin must be inserted into the insertion groove 3 of the base 1, and then the upper part of the fin 4 must be inserted into the positioning groove 6 of the holding jig 5, which makes it difficult to fix the position by the holding jig 5. There is.

Further, in the case of the apparatus shown in FIG. 7, as in the case of the apparatus shown in FIG. 5, the die cost is high, pre-work for positioning the fins 7 in parallel is required, which is complicated and the manufacturing time becomes long. However, there is a problem that work efficiency is low.

In consideration of the above points, the present invention improves heat dissipation efficiency and work efficiency, reduces die cost,
An object is to provide a heat dissipation device that can be manufactured at low cost.

[0009]

In order to solve the above-mentioned problems, a heat dissipation device of the present invention comprises a plurality of fins arranged in parallel on a base and a surface of each fin projectingly formed by pressing. A plurality of protrusions whose tips are in contact with the back surface of the front fins are provided, and the positions of the protrusions of the adjacent fins are different.

[0010]

The heat dissipation device of the present invention having the above-described structure is
Since a protrusion whose tip contacts the back surface of the front fin is provided on the front surface side of each fin by press working, the fin can be manufactured with a simple press die, and the die cost can be reduced.

Further, since the positions of the protrusions of the adjacent fins are different from each other, the tips of the protrusions do not fit into the backs of the protrusions of the front fins, which facilitates the positioning of the fins, thus reducing the manufacturing time. Is shortened, work efficiency is improved, and manufacturing cost is reduced. In addition, since the length of the protrusion can be arbitrarily set, the fin pitch can be reduced and heat dissipation efficiency can be improved.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment will be described with reference to FIGS. In these figures, 10 is a plurality of fins arranged in parallel on the base 1 at equal intervals, 11 is a protrusion,
Three fins are provided in the upper and lower central portions on the front surface side of the fin 10 in a horizontal row by press working.
Reference numeral 12 denotes a plurality of fins arranged side by side on the base 1 and arranged between the adjacent fins 10. The fins 12 are projected at a lower portion and a central portion of the upper portion of the fins 12 in a row in a row to form three by three. The fin 11 is provided with a protruding portion 11 and the tip of the protruding portion 11 of the fin 12 does not have the protruding portion 11 of the fin 10.
Of the fins 10 and 12 so that they do not overlap.

When the fins 10 and 12 are assembled, the fins 10 and 12 are alternately arranged side by side, and the front plate 14 of the fixing jig 13 is provided with a protrusion of the front fin 10 as shown in FIG. 11, the rear plate 15 is brought into contact with the rear face of the rear fin 10, the side plates 16 are brought into contact with the front and rear sides of the fins 10 and 12, respectively.
8 is tightened and the fins 10 and 12 are positioned and fixed. Then, a holding jig (not shown) is placed on each of the fins 10 and 12, and the lower portions of the fins 10 and 12 are fixed to the base 1 by brazing solder or ultrasonic solder. In addition,
The length of the protrusions 11 can be arbitrarily produced. When the fin pitch is small, the length of the protrusions 11 is short, and when the fin pitch is large, the length of the protrusions 11 is long.

Further, in the above embodiment, the fin 10 and the fin 12 are combined, but as shown in FIG.
1 by press work 4 in 1 row horizontally on top and bottom
The fins 19 formed individually may be combined, and any combination may be used as long as the positions of the protrusions 11 of the adjacent fins are different. Further, it is desirable that at least three protrusions 11 are not located on the same straight line in one fin, in which case the fins are positioned in parallel.

[0015]

Since the present invention is constructed as described above, it has the following effects. In the heat dissipation device of the present invention, the fins 10, 12 are provided on the front surface side of each of the fins 10, 12 by press working so that the tips of the fins contact the back surface of the front fin.
Can be manufactured, and the die cost can be reduced.

Further, since the positions of the protrusions 11 of the adjacent fins 10 and 12 are different from each other, the tips of the protrusions 11 do not fit into the backs of the protrusions 11 of the front fins, and the fins 10 are easily formed. , 12 can be positioned, the manufacturing time can be shortened, the work efficiency can be improved, the manufacturing cost can be reduced, and furthermore, the length of the protrusion 11 can be manufactured arbitrarily. It is possible to reduce the fin pitch and improve heat dissipation efficiency.

[Brief description of drawings]

FIG. 1 is a cutaway front view of an embodiment of the present invention.

FIG. 2 is a cutaway plan view of a portion of FIG.

3 is a cross-sectional plan view of the manufacturing process of FIG.

4 is a cutaway plan view of a fin having a shape different from that of the fin of FIG. 1. FIG.

FIG. 5 is a front view of a conventional example.

FIG. 6 is a front view of another conventional example.

FIG. 7 is a front view of still another conventional example.

[Explanation of symbols]

 1 Base 10 Fin 11 Projection 12 Fin 19 Fin

Claims (1)

[Claims] 1. A plurality of fins arranged side by side on a base, and a plurality of protrusions protruding from the front surface side of each fin by press working and having their tips abutting the back surface of the front fin. , A heat dissipation device in which the position of each protrusion of adjacent fins is different.