HEAT DISSIPATING DEVICE AND HEAT DISSIPATING FIN

Abstract

A heat dissipating device includes a heat dissipating fin and a heat pipe. The heat dissipating fin includes a fin body, a through hole, a first arc-shaped portion and a second arc-shaped portion. The through hole is formed on the fin body and has a central line. The first arc-shaped portion extends from the through hole in a first direction and the second arc-shaped portion extends from the through hole in a second direction, wherein the first direction is opposite to the second direction. The first arc-shaped portion and the second arc-shaped portion are located at opposite sides of the central line. The heat pipe is disposed in the through hole.

Description

BACKGROUND OF THE INVENTION

1. Field of the Invention

The invention relates to a heat dissipating device and a heat dissipating fin and, more particularly, to a heat dissipating fin having two arc-shaped portions located at opposite sides of a through hole and a heat dissipating device equipped with the heat dissipating fin.

2. Description of the Prior Art

Heat dissipating device is a significant component for electronic products. When an electronic product is operating, the current in circuit will generate unnecessary heat due to impedance. If the heat is accumulated in the electronic components of the electronic product without dissipating immediately, the electronic components may get damage due to the accumulated heat. Therefore, the performance of heat dissipating device is a significant issue for the electronic product.

So far the heat dissipating device used in the electronic product usually consists of a heat pipe, a heat dissipating fin and a heat dissipating fan, wherein one end of the heat pipe contacts the electronic component, which generates heat during operation, the other end of the heat pipe is connected to the heat dissipating fin, and the heat dissipating fan blows air to the heat dissipating fin, so as to dissipate heat. In the prior art, there are two methods for connecting the heat pipe and the heat dissipating fin, as follows. The first method is to fix the heat pipe in a through hole of the heat dissipating fin directly in a tight-fitting manner. However, when the heat pipe is inserted into the through hole by the first method, the heat pipe and the heat dissipating fin may pull and drag each other, such that a surface of the heat pipe may be scratched, the heat dissipating fin may deform or the through hole may crack. Accordingly, the yield rate of the first method is low. The second method is to connect the heat pipe and the through hole of the heat dissipating fin in a loose-fitting manner, wherein a thermal conductive adhesive or a solder paste is filled in a gap between the heat pipe and the heat dissipating fin. The second method has to form a groove on each of the heat dissipating fins to communicate with the through holes and then fill the thermal conductive adhesive or the solder paste in the groove. Afterward, the heat pipe is inserted into the through hole. Then, the thermal conductive adhesive or the solder paste are heated to be converted form solid into liquid and then cooled to be converted form liquid into solid, such that the thermal conductive adhesive or the solder paste is filled in the gap between the heat pipe and the heat dissipating fin. However, the process of the second method is complicated and additional thermal conductive adhesive or solder paste may be remained on the heat dissipating fin, such that the appearance is not good and the thermal impedance increases accordingly. Furthermore, the manufacturing time is long, so the manufacturing efficiency is low.

SUMMARY OF THE INVENTION

The invention provides a heat dissipating fin having two arc-shaped portions located at opposite sides of a through hole and a heat dissipating device equipped with the heat dissipating fin, so as to solve the aforesaid problems.

According to an embodiment of the invention, a heat dissipating device comprises a heat dissipating fin and a heat pipe. The heat dissipating fin comprises a fin body, a through hole, a first arc-shaped portion and a second arc-shaped portion. The through hole is formed on the fin body and has a central line. The first arc-shaped portion extends from the through hole in a first direction and the second arc-shaped portion extends from the through hole in a second direction, wherein the first direction is opposite to the second direction. The first arc-shaped portion and the second arc-shaped portion are located at opposite sides of the central line. The heat pipe is disposed in the through hole.

According to another embodiment of the invention, a heat dissipating fin comprises a fin body, a through hole, a first arc-shaped portion and a second arc-shaped portion. The through hole is formed on the fin body and has a central line. The first arc-shaped portion extends from the through hole in a first direction and the second arc-shaped portion extends from the through hole in a second direction, wherein the first direction is opposite to the second direction. The first arc-shaped portion and the second arc-shaped portion are located at opposite sides of the central line.

As mentioned in the above, the invention forms two arc-shaped portions at opposite sides of the through hole of the heat dissipating fin. An operator may insert the heat pipe into the through hole of the heat dissipating fin and then punch the two arc-shaped portions at opposite sides of the through hole. After punching the two arc-shaped portions, the two arc-shaped portions fix the heat pipe in a tight-fitting manner. Accordingly, the invention can connect the heat pipe and the heat dissipating fin tightly and improve the yield rate and the efficiency of manufacturing the heat dissipating device.

These and other objectives of the present invention will no doubt become obvious to those of ordinary skill in the art after reading the following detailed description of the preferred embodiment that is illustrated in the various figures and drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view illustrating a heat dissipating device according to an embodiment of the invention.

FIG. 2 is a perspective view illustrating the heat dissipating device shown in FIG. 1 from another viewing angle.

FIG. 3 is a perspective view illustrating the heat dissipating fin shown in FIG. 1.

FIG. 4 is a perspective view illustrating the heat dissipating fin shown in FIG. 3 from another viewing angle.

DETAILED DESCRIPTION

Referring to FIGS. 1 to 4, FIG. 1 is a perspective view illustrating a heat dissipating device 1 according to an embodiment of the invention, FIG. 2 is a perspective view illustrating the heat dissipating device 1 shown in FIG. 1 from another viewing angle, FIG. 3 is a perspective view illustrating the heat dissipating fin 10 shown in FIG. 1, and FIG. 4 is a perspective view illustrating the heat dissipating fin 10 shown in FIG. 3 from another viewing angle.

As shown in FIGS. 1 and 2, the heat dissipating device 1 of the invention comprises a plurality of heat dissipating fins 10, a plurality of heat pipes 12 and a base 14, wherein the number of the heat dissipating fins 10 and the number of the heat pipes 12 can be determined according to practical applications and are not limited to the embodiment shown in FIGS. 1 and 2. The heat dissipating fin 10 comprises a fin body 100, a plurality of through holes 102, a plurality of first arc-shaped portions 104 and a plurality of second arc-shaped portions 106, wherein the number of the through holes 102, the number of the first arc-shaped portions 104 and the number of the second arc-shaped portions 106 can be determined according to the number of the heat pipes 12 and are not limited to the embodiment shown in FIGS. 1 and 2.

As shown in FIGS. 3 and 4, the through hole 102 is formed on the fin body 100 and has a central line C. The first arc-shaped portion 104 extends from the through hole 102 in a first direction D1 and the second arc-shaped portion 106 extends from the through hole 102 in a second direction D2, wherein the first direction D1 is opposite to the second direction D2. In other words, the first arc-shaped portion 104 and the second arc-shaped portion 106 are formed at opposite sides of the through hole 102. Furthermore, the first arc-shaped portion 104 and the second arc-shaped portion 106 are located at opposite sides of the central line C.

The heat pipe 12 has a heat dissipating end 120 and a heat absorbing end 122, wherein the heat dissipating end 120 is opposite to the heat absorbing end 122. It should be noted that the structure and the principle of the heat pipe 12 are well known by one skilled in the art, so the related explanation will not be depicted herein.

To assemble the heat dissipating device 1, an operator may fix the heat dissipating fins 10 on the base 14 by welding, engaging or other manners first. Afterward, the operator may insert the heat dissipating end 120 of the heat pipe 12 into the through hole 102 of the heat dissipating fin 10 and fix the heat absorbing end 122 of the heat pipe 12 on the base 14 by welding, engaging or other manners . Then, the operator may punch the first arc-shaped portion 104 and the second arc-shaped portion 106 formed at opposite sides of the through hole 102. After punching the first arc-shaped portion 104 and the second arc-shaped portion 106, the first arc-shaped portion 104 and the second arc-shaped portion 106 fix the heat pipe 12 in a tight-fitting manner. Accordingly, the invention can connect the heat pipe 12 and the heat dissipating fin 10 tightly and improve the yield rate and the efficiency of manufacturing the heat dissipating device 1.

In this embodiment, a radian of the first arc-shaped portion 104 and a radian of the second arc-shaped portion 106 both may be between 15 degrees and 345 degrees. Preferably, the radian of the first arc-shaped portion 104 and the radian of the second arc-shaped portion 106 both may be 180 degrees. In other words, the first arc-shaped portion 104 and the second arc-shaped portion 106 both may be semi-circles, such that the first arc-shaped portion 104 and the second arc-shaped portion 106 may clamp the heat pipe 12 more tightly after the punching process. It should be noted that the radian of the first arc-shaped portion 104 may be identical to or different from the radian of the second arc-shaped portion 106 according to practical applications. In practical applications, the through hole 102, the first arc-shaped portion 104 and the second arc-shaped portion 106 may be formed by punching the fin body 100.

Furthermore, the first arc-shaped portion 104 and the second arc-shaped portion 106 may be symmetrically located at opposite sides of the central line C of the through hole 102, such that the first arc-shaped portion 104 and the second arc-shaped portion 106 may clamp the heat pipe 12 more tightly after the punching process. It should be noted that the first arc-shaped portion 104 and the second arc-shaped portion 106 may be asymmetrically located at opposite sides of the central line C of the through hole 102 according to practical applications.

As mentioned in the above, the invention forms two arc-shaped portions at opposite sides of the through hole of the heat dissipating fin. An operator may insert the heat pipe into the through hole of the heat dissipating fin and then punch the two arc-shaped portions at opposite sides of the through hole. After punching the two arc-shaped portions, the two arc-shaped portions fix the heat pipe in a tight-fitting manner. Accordingly, the invention can connect the heat pipe and the heat dissipating fin tightly and improve the yield rate and the efficiency of manufacturing the heat dissipating device.

Those skilled in the art will readily observe that numerous modifications and alterations of the device and method may be made while retaining the teachings of the invention. Accordingly, the above disclosure should be construed as limited only by the metes and bounds of the appended claims.

Claims

1. A heat dissipating device comprising:

a heat dissipating fin comprising a fin body, a through hole, a first arc-shaped portion and a second arc-shaped portion, the through hole being formed on the fin body and having a central line, the first arc-shaped portion extending from the through hole in a first direction, the second arc-shaped portion extending from the through hole in a second direction, the first direction being opposite to the second direction, the first arc-shaped portion and the second arc-shaped portion being located at opposite sides of the central line; and

a heat pipe disposed in the through hole.

2. The heat dissipating device of claim 1, wherein a radian of the first arc-shaped portion and a radian of the second arc-shaped portion both are between 15 degrees and 345 degrees.

3. The heat dissipating device of claim 1, wherein the first arc-shaped portion and the second arc-shaped portion are symmetrically located at opposite sides of the central line.

4. The heat dissipating device of claim 1, further comprising a base, the heat dissipating fin being disposed on the base, the heat pipe having a heat dissipating end and a heat absorbing end, the heat dissipating end being opposite to the heat absorbing end, the heat dissipating end being disposed in the through hole, the heat absorbing end being fixed on the base.

5. A heat dissipating fin comprising:

a fin body;

a through hole formed on the fin body and having a central line;

a first arc-shaped portion extending from the through hole in a first direction; and

a second arc-shaped portion extending from the through hole in a second direction, the first direction being opposite to the second direction, the first arc-shaped portion and the second arc-shaped portion being located at opposite sides of the central line.

6. The heat dissipating fin of claim 5, wherein a radian of the first arc-shaped portion and a radian of the second arc-shaped portion both are between 15 degrees and 345 degrees.

7. The heat dissipating fin of claim 5, wherein the first arc-shaped portion and the second arc-shaped portion are symmetrically located at opposite sides of the central line.