JPH0132918B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a novel cylindrical or semi-cylindrical fin for a heat sink in which the fin is fitted into a groove provided in a substrate and caulked to the substrate.

Conventionally, this type of heatsink has fins placed on the board at extremely narrow intervals, e.g. 0.3mm, with fin spacing of around 2mm.
A method is known in which a thin fin of approximately 1.0 mm in thickness is inserted into a groove provided in a substrate, and a convex portion of the substrate is crushed using a spacing plate having a chevron-shaped tip and a long groove corresponding to the fin to swage the fin. Iruga (Tokuko Showa 36-)
9565), these fins are generally flat or strip-shaped.

The present invention provides a cylindrical or semi-cylindrical fin structure with a high heat dissipation rate, and the cylindrical or semi-cylindrical fins are fitted into grooves of a substrate and have individual or multiple fins. A wide fin substrate portion extending to one end side can be bent or rolled into a cylindrical, semi-cylindrical or rectangular cylindrical shape.

That is, when the fins of the present invention are individually independent single type, they can be formed by press punching a battledore-shaped original sheet from a thin plate, and the wide base plate portion is rolled into a pipe shape, for example, to form a heat dissipation part. Or, in the case of a multi-unit system with more than 1,000 fins, a blank plate with a wide fin base plate formed at predetermined intervals from one continuous end is press-punched, and the same process can be easily and inexpensively made into a pipe-like shape with a high heat dissipation rate. can give you fins.

It goes without saying that the above-mentioned fins can be attached not only to one side of the board but also to both sides.

The present invention will be explained below with reference to embodiments shown in the drawings.

Embodiment 1 FIG. 1 shows a battledore-shaped fin original plate 1, and the original plate 1 is composed of a narrow portion 1-a, a wide substrate portion 1-b, and a tapered portion 1-c in between. The length of the narrow width portion 1-a may be made somewhat longer than the fitting length into the groove 3 of the substrate 2 shown in FIG. 3 to which it is fitted and caulked.

As shown in FIG. 2, the battledore-shaped original plate 1 is formed into a pipe-shaped heat radiating part 4 by rolling the wide substrate part 1-b into a pipe shape from the left and right sides. Reference numeral 5 indicates a seam when the wide substrate portion 1-b is rolled up into the pipe-shaped heat dissipating portion 4.

As shown in FIG. 3, the pipe-like fin described above is produced by fitting the narrow part 1-a into the groove 3 provided in the substrate 2, and by squeezing the part between the grooves, the narrow part 1-a is inserted into the groove 3. Can be caulked together.

Note that the groove 3 is cut obliquely at an angle of 45° or more with respect to the plane perpendicular to the substrate 2, so that the pipe-like fin has a narrow portion 1.
-a is bent at the above-mentioned angle along the insertion depth level into the groove 3, and the tip is fitted into the groove 3 and caulked as described above.

Example 2 In contrast to the single type fin of Example 1, this example shows a double type or more multiple type (double type) fin.

In FIGS. 4 to 6, the multiple section 6 is a multiple section at one end of the fin that fits into the groove 3 of the substrate 2, as shown in FIG.
It may be a fully connected type in which all the fins attached to the fins are connected in series, but it may also be a multiple type in which two or more fins are connected.

A wide fin base plate 7 is made from an aluminum plate or an aluminum plate with a wide fin base plate 7 cut from both sides of the boundary between the two fins 6 and 7 from one end 6 of the multiple fin type at an appropriate fin mounting interval. By punching and molding an alloy plate and rolling the fin board part 7 as shown in Fig. 4, it becomes a cylindrical heat dissipating part 8, and the fin board part 7 can be rolled into a U-shape or semicircle shape as shown in Fig. 5. In the semi-cylindrical heat dissipation part 8',
Further, by bending the fin board portion 7 into a triangular shape as shown in FIG. 6, triangular cylindrical heat dissipating portions 8'' can be formed.

One end of the multiple cylindrical or semi-cylindrical fin thus obtained is fitted into the groove 3 of the substrate 2 as shown in FIG. Multiple fins can be simultaneously caulked to the substrate by caulking adjacent surface portions.

The small holes 9 provided on one end side 6 of the fins serve to increase the strength of the fins when the fins are crimped to the substrate because the caulking of the substrate is inserted into the small holes 9 when the fins are caulked to the substrate.

This example has the advantage that multiple fins with predetermined fin attachment intervals can be caulked into the grooves of the substrate simultaneously and completely.

[Brief explanation of drawings]

FIG. 1 is a plan view of a battledore-shaped original plate of a fin showing Embodiment 1 of the present invention, FIG. 2 is a perspective view of a pipe-shaped fin formed from the original plate of FIG. 1, and FIG. 3 is an embodiment of the present invention. FIG. 2 is an explanatory diagram of fins related to the invention being caulked to a substrate to form a heat sink. 4 to 6 are illustrative views of the multiple fins according to the second embodiment, and FIG. 7 is a perspective view showing the state in which the multiple fins are attached to the substrate. 1...Hago plate-like original plate, 1-a...Narrow width part, 1-
b... Wide fin board section, 2... Board, 3...
Groove, 4...pipe-shaped heat dissipation section, 6...multiple section, 7...
...Wide fin board section, 8, 8', 8''...heat dissipation section.

Claims (1)

[Claims] 1. A heat sink fin in which one end of the fin is fitted into a groove provided in a substrate and the fins are caulked together,
A fin characterized in that a wide fin substrate portion continuing to one end of the fin that fits into the groove is formed into a cylindrical or semi-cylindrical heat dissipating portion. 2. In the fins of the heat sink, one end of the fins is fitted into a groove provided in the substrate and the fins are caulked together.
A fin characterized in that one end side of a plurality of fins that fit into the groove is formed into a series, and a wide fin substrate portion continuing to the one end side is formed into a cylindrical or semi-cylindrical heat dissipation portion.