JP4592996B2 - heatsink - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a heat sink that is easy to process and assemble and that can stably obtain good cooling characteristics.
[0002]
[Prior art]
Electronic parts such as a CPU mounted on an electronic device such as a personal computer are cooled by a heat sink because they generate a large amount of heat.
By the way, in recent years, personal computers and the like have been reduced in size and thickness for the purpose of portability, and accordingly, heat sinks are required to be reduced in size and thickness.
[0003]
In response to this request, the present inventors provide a U-shaped opening 32 at a predetermined position of the U-shaped (U-shaped) fin 31 shown in FIG. A heat sink with 5 inserted was proposed (Japanese Patent Application No. 00-082811).
For example, the fin 31 has a height of 7 mm and a width of 20 mm, and the flat heat pipe 5 has a thickness of 1 mm, a width of 7 mm, and a length of 70 mm. The heat sink is small and thin.
[0004]
[Problems to be solved by the invention]
However, since this heat sink improves the thermal contact between the heat pipe and the plate-like fin, the heat pipe insertion hole of the plate-like fin is processed with high accuracy according to the outer diameter of the heat pipe. It is necessary to insert a flat heat pipe into the B-shaped opening, and it takes time to assemble, and even if the inner dimension of the B-shaped opening is slightly deviated, the heat transfer characteristics between the two There is a problem that the cooling property is remarkably lowered and good cooling characteristics cannot be obtained stably.
Since these problems are more likely to occur as the heat pipe becomes thinner, it is a problem that should be solved quickly in order to reduce the size and thickness of the heat sink.
An object of the present invention is to provide a heat sink that is easy to process and assemble and that can stably obtain good cooling characteristics.
[0005]
[Means for Solving the Problems]
According to the present invention, in a heat sink in which fins are attached to a heat conductive member, a heat conductive member insertion groove is provided in the fin, a heat conductive member is inserted into the insertion groove, and the heat conductive member is a spring. The heat sink is pressed against the insertion groove of the fin by a member.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be specifically described with reference to the drawings.
In all the drawings for explaining the present invention, those having the same function are denoted by the same reference numerals, and repeated explanation thereof is omitted.
1A is a perspective view showing a first embodiment of the heat sink of the present invention, FIG. 1B is a perspective view of a U-shaped fin used in the heat sink, and FIG. 1C is a view of the heat sink as viewed from above. is there.
This heat sink is provided with a heat conductive member insertion groove 4 from the side 2 to the side of the bottom 3 of the U-shaped fin 1, and a flat heat pipe 5 is inserted into the insertion groove 4. The member 6 is configured to be pressed against the inner surface of the insertion groove 4 of the U-shaped fin 1.
The spring member 6 is a linear spring provided with hook-like stoppers 7 at both ends, and the stoppers 7 are locked in locking grooves 8 provided on both end surfaces of the bottom 3 of the fin 1.
[0007]
1 (a) to 1 (c), reference numeral 9 denotes a cut-and-raised portion of the U-shaped fin 1. This cut-and-raised portion 9 comes into contact with the flat heat pipe 5 to improve the heat radiation characteristics and stabilize the fin attachment. Make it.
[0008]
In this heat sink, the step of inserting the flat heat pipe 5 into the insertion groove 4 of the fin 1, the spring member 6 is engaged with the engagement groove 8 of the U-shaped fin 1, and the heat pipe 5 is pressed against the inner surface of the insertion groove 4. Assembling can be performed according to processes, and these processes can be performed without the need for labor. Further, the insertion groove 4 is easier to process than the conventional square-shaped opening, and the heat pipe 5 is pressed by the spring member 6 against the U-shaped fin 1, so that the heat pipe 5 and the U-shaped fin 1 The thermal contact between them becomes good, and excellent cooling characteristics can be stably obtained.
[0009]
FIG. 2 is a perspective view showing a second embodiment of the heat sink of the present invention.
In this heat sink, a heat conductive member insertion groove 4 is provided from the side 2 of the U-shaped fin 1 to the side of the bottom 3, a flat heat pipe 5 is inserted into the insertion groove 4, and the heat pipe 5 further has a strip shape. The spring member 16 is configured to be pressed against the inner surface of the insertion groove 4 of the U-shaped fin 1.
In this heat sink, since the heat pipe 5 is pressed against the inner surface of the insertion groove 4 of the U-shaped fin 1 by the strip-shaped spring member 16, the pressing area is larger than that of the linear spring member 6, and the heat pipe 5 and the U The thermal contact with the letter-shaped fin 1 becomes better.
[0010]
FIG. 3A is a perspective view showing a third embodiment of the heat sink of the present invention, and FIG. 3B is a perspective view of an L-shaped fin used in the heat sink.
This heat sink is the same as the heat sink shown in FIG. 1A except that the heat conductive member insertion groove 4 is provided on the side surface of the bottom 3 of the L-shaped fin 11.
The L-shaped fin 11 (FIG. 3B) does not have one side 2 of the U-shaped fin 1 shown in FIG. 1B, and the insertion groove 4 can be provided on the side surface of the bottom 3 suddenly. . Therefore, it is easier to process than the U-shaped fin 1 shown in FIG.
This heat sink is also easy to assemble like the heat sink shown in FIG. 1A, and the heat pipe 5 is pressed against the L-shaped fin 11 by the spring member 6, so that the heat pipe 5 and the L-shaped fin 11 are The thermal contact is good, and excellent cooling characteristics can be stably obtained.
[0011]
FIG. 4 (a) is a perspective view showing a fourth embodiment of the heat sink of the present invention, and (b) is a perspective view of a flat fin used in the heat sink.
This heat sink is provided with the insertion groove 4 on the side surface of the flat fin 21, and is easier to process than the L-shaped fin 11 shown in FIG.
This heat sink is also easy to assemble like the heat sink shown in FIG. 1A, and the heat pipe 5 is pressed against the flat fin 21 by the spring member 6, so that the heat between the heat pipe 5 and the flat fin 21 is Good contact and excellent cooling characteristics can be obtained stably.
[0012]
As described above, the heat sink of the present invention shown in FIGS. 1 to 4 is particularly suitable for downsizing and thinning of the heat sink because the heat pipe 5 is flat, and can sufficiently cope with the heat sink having the dimensions described in paragraph 0003 above. Is.
[0013]
Although the heat sink using the U-shaped fin, the L-shaped fin, or the flat fin has been described above, the present invention can provide the same effect even when a fin having another shape is used. Further, the present invention is not limited to the flat heat pipe, but can be applied to a round tubular heat pipe 15 as shown in FIGS.
9 is a cut-and-raised part, but it is somewhat difficult to cut it into a cylindrical shape. Instead of the cut-and-raised part, a semicircular cut is made in the heat conductive member insertion groove, and a semi-cylindrical body is provided there. May be provided by welding or the like.
[0014]
In the heat sink of the present invention, when the fins are U-shaped or L-shaped, it is preferable that adjacent fins are connected by spot welding or the like, so that the shape of the heat sink is stable. In the case of flat fins, it is desirable that the heat conductive member insertion groove 4 is cut and raised to widen the contact area with the heat pipe 5 as shown in FIG.
[0015]
In the present invention, for the spring member, any metal material having a locking force with the fin locking groove and a pressing force to the insertion groove can be used. Particularly, brass, phosphor bronze, stainless steel and the like are strong and strong. It is a desirable material with excellent spring properties. The shape of the spring member is arbitrary such as a linear shape or a belt shape. The method for locking the spring member to the fin is not particularly limited. Further, the spring member 6 conducts the heat of the heat pipe 5 to the fins 1, 11, and 21, and itself performs a heat dissipation action.
In the above embodiment, the heat pipe is used as the heat conductive member. However, the same effect can be obtained when a rod-shaped metal member having heat conductivity such as copper or aluminum is used instead of the heat pipe.
[0016]
【The invention's effect】
As described above, in the heat sink of the present invention, since the heat conductive member is inserted into the heat conductive member insertion groove of the fin, processing of the fin and assembly of the heat sink are easy. In addition, since the heat conductive member is pressed against the insertion groove by the spring member, the thermal contact between the heat conductive member and the fin is good, and the CPU can be cooled stably.
Therefore, there is an industrially significant effect.
[Brief description of the drawings]
1A is a perspective view showing a heat sink according to a first embodiment of the present invention, FIG. 1B is a perspective view of a U-shaped fin used in the heat sink, and FIG. 1C is a view of the heat sink as viewed from above. FIG.
FIG. 2 is a perspective view showing a second embodiment of the heat sink of the present invention.
3A is a perspective view showing a third embodiment of the heat sink of the present invention, and FIG. 3B is a perspective view of an L-shaped fin used in the heat sink.
4A is a perspective view showing a fourth embodiment of a heat sink of the present invention, FIG. 4B is a perspective view of a flat fin used in the heat sink, and FIG. 4C is another embodiment of the flat fin. It is a perspective view shown.
5A is a perspective view showing a heat sink according to a fifth embodiment of the present invention, FIG. 5B is a perspective view of a U-shaped fin used in the heat sink, and FIG. 5C is a view of the heat sink from above. FIG.
FIG. 6 is a perspective view of a conventional heat sink.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cross-section U-shaped fin 2 Fin side part 3 Fin bottom part 4 Thermal conductive member insertion groove 5 Flat heat pipe 6 Linear spring member 7 Spring member stopper 8 For stopping a spring member provided on the fin Locking groove 9 Cut and raised portion 11 L-shaped fin 15 Round tubular heat pipe 16 Strip-shaped spring member 21 Flat fin 31 U-shaped fin 32 B-shaped opening

Claims (2)

In the heat sink in which the fin is attached to the heat conductive member, the fin is formed by arranging any one of a U-shaped fin, an L-shaped fin, and a flat fin along the heat conductive member, and the fin is thermally conductive. A member insertion groove is provided; a heat conductive member is inserted into the heat conductive member insertion groove; and the heat conductive member is pressed against the heat conductive member insertion groove by a linear spring member or a belt-like spring member. A heat sink characterized by being. The heat sink according to claim 1, wherein the heat conductive member insertion groove is a U-shaped groove, and the heat conductive member is a flat heat pipe that fits into the groove.

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