JPS595983Y2 - cooling body - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cooling body having a plurality of stacked cooling fins, and more particularly to a cooling body suitable for use as a semiconductor stack in an air-cooled chopper device or the like.

As shown in FIGS. 1 and 3, the conventional cooling body consists of a plurality of plate-shaped cooling fins 2 and 3 that are electrically and thermally conductive and stacked vertically in parallel at appropriate intervals. Cooling fins 2 and 3 are integrally joined to a columnar cooling base body 1.

The cooling fin 2 has a notch 6 at one end for attaching the terminal block 7, and is joined to the cooling base together with the cooling fin 3 having no notch.

A terminal block 7 having a screw tap 7A is fitted into the notch 6 of the cooling fin 2 and is brazed to the cooling fins 2 and 3.
The wires are now connected using the .

Therefore, in such a cooling body according to the prior art,
The cooling fins must be of different types, with or without notches 6 for attaching the terminal blocks, and furthermore, the manufacturing and attaching work of the terminal blocks 7 increases, which increases the cost of the cooling body.

In addition, since the terminal block 7 is fixed by brazing,
Terminal blocks 7 that are easy to braze to the cooling fins are generally made of aluminum for aluminum and copper for copper fins.

However, these terminal blocks 7 have a disadvantage that the screw tabs 7A of the terminal blocks 7 are easily damaged because of their weak mechanical strength.

As explained above, in the conventional method, two types of cooling fins had to be made, which was uneconomical, and the process of shaping the wiring connections was troublesome and took a long time.

The object of the present invention is to eliminate the above-mentioned drawbacks and to obtain an inexpensive cooling body that allows wiring connections to be easily fixed.

The feature of the present invention is that each cooling fin has a small hole for the terminal which becomes the terminal at one end thereof, and a notch larger than the small hole is provided in a point-symmetrical or line-symmetrical position with the small hole. At the same time, when the terminal small hole of at least one cooling fin of each of the cooling plates is used as a terminal,
The cooling body is constructed by stacking adjacent cooling fins such that the notch is located opposite to the terminal hole.

One idea behind the present invention is to enable electrical connection without using the terminal block 7 that was conventionally attached.

As a specific example, a small hole for a terminal is formed near the end of each cooling fin stacked vertically at appropriate intervals, and the small hole is placed in a point-symmetrical or line-symmetrical position with the small hole. The reason is that they have the same shape with a larger cut arrow part.

According to this structure, various drawbacks caused by attaching the terminal block 7 can be eliminated.

Note that when a space is required for electrical connection using a small hole, each cooling fin is arranged so that the notch is located adjacent to the small hole.

According to this, even when the fin spacing is narrow, there is no need to make the spacing between the fin having the small hole and the fins above and below it larger than the others, and a sufficient space can be obtained.

Yet another idea of the present invention is to make it possible to configure the cooling body with one type of noise and to make electrical connections.

This concept will be specifically explained using drawings.

FIGS. 2 and 4 are explanatory diagrams of an embodiment of the present invention showing the above concept.

A cooling body according to an embodiment of the present invention has cooling fins 4 joined to a columnar cooling matrix 1.

The cooling fin 4 has a small hole 5 formed at one end, and a notch 6A formed at the other end.

These cooling fins 4 are properly rotated approximately 180 degrees around the columnar cooling base 1, so that the small holes 5 can be used as terminal holes.

In the illustrated embodiment, the cooling fin 4A, whose eyelets 5 are used as terminal holes, is rotated 180° with respect to the other adjacent cooling fin 4B, thereby making the cooling fin 4
A working space 8 for wiring connection is formed above and below the small hole 5 of A by the notch 6A of the other cooling fin 4B.

In the above embodiment, the cooling fin 4 has one small hole and one small hole.
However, the number of small holes and notches is not limited to what is shown in the drawings.

Also, depending on the number of small holes and notches, cooling fins 4A and 4
The relative rotation angle with respect to B is not limited to the illustrated 180°, but may be other angles.

As described above, according to one embodiment of the present invention, it is sufficient to prepare only one type of cooling fins, thereby reducing the number of parts, improving work efficiency, and reducing cost.

Furthermore, terminal connections do not require brazing, which is difficult to work with, and wiring can be connected extremely easily.

The shape of the cooling fins is not limited to a rectangle.

According to the present invention, it is possible to obtain an inexpensive cooling body in which the wiring connection portion can be easily shaped.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a cooling body according to the prior art, FIG. 2 is a plan view of a cooling body according to an embodiment of the present invention, FIG. 3 is a sectional view taken along line II in FIG. Line I■-■■ in Figure 2
FIG. 1... Cooling base, 2... Cooling fins,
3... Cooling fin, 4... Cooling fin, 4A... Cooling fin, 4B... Cooling fin, 5... Small hole, 6 ...Notch, 6A...Notch, 7...Terminal block, 7A...Screw tap, 8...Space .

Claims (1)

[Scope of utility model registration request] A plurality of cooling fins each having a small hole for a terminal in a part of the periphery and a notch larger than the small hole for the terminal at a position where the distance from the central axis is equal to that of the small hole for the terminal,
A cooling body characterized in that adjacent cooling fins are stacked such that the notch portions of adjacent cooling fins face the terminal holes of one cooling fin.