JP2000220973A - Structure and method for fixing heat pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure and method for fixing a heat pipe which can improve the heat transfer characteristics between a heat exchange member and a heat pipe. SOLUTION: In a structure wherein heat exchange members and heat pipes are fixed, there are provided heat receiving blocks 2, 3 which are brought into contact with each other, a holding groove 6 which is formed where the blocks 2, 3 are opposed to each other to hold a heat pipe 1, engaging protrusions 7 formed by extrusion molding the block 2, engaging holes 9A each of which is formed by blanking the block 3 to receive the protrusions 7, and a rib 10 wherein the forward end of the protrusion 7 is caulked so as to be engaged with the block 3 having the hole 9A so that the blocks 2, 3 are positioned and fixed to each other in the thickness direction thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a fixing structure and a fixing method for a heat pipe used in a cooling system, a heating system, a heat transport system, or the like.

[0002]

2. Description of the Related Art In electronic equipment, for example, personal computers, arithmetic processing units (CPs) have been developed for the purpose of multifunctionalization and improvement of processing speed.
U, MPU). Since these electronic elements generate heat due to the current-carrying resistance, the original functions may be impaired if overheated.

Therefore, conventionally, a cooling system for dissipating the heat of these electronic elements into the air has sometimes used a heat receiving block (heat exchange member) and a heat pipe together. The heat receiving block is made of a metal material having excellent heat conductivity, for example, aluminum or an aluminum alloy. On the other hand, the heat pipe is obtained by encapsulating a condensable fluid such as water or alcohol as a working fluid in a vacuum-evacuated state inside a closed vessel such as a metal pipe.

The heat receiving block is used in a state in which the heat receiving block is in contact with an electronic element and a heat pipe is fixed to the heat receiving block. Then, when a temperature difference occurs inside the heat pipe due to heat generation of the electronic element, the working fluid evaporated in the evaporating section flows to the condensing section and is radiated and condensed, so that heat transport is performed as latent heat of the working fluid, The electronic element is cooled. In such a cooling system, the heat transfer area between the electronic element and the heat receiving block is increased by bringing the heat receiving block into surface contact with the electronic element.

[0005]

In the conventional heat pipe fixing structure, a holding groove is formed on the outer surface of the heat receiving block in order to secure a heat transfer area of a fixing portion between the heat pipe and the heat receiving block. A configuration is adopted in which the outer peripheral surface of the heat pipe abuts on the inner surface of the holding groove. Further, in order to securely fix the heat receiving block and the heat pipe, the heat pipe and the heat receiving block are bonded with an adhesive, for example, an epoxy resin-based adhesive.

However, according to the conventional heat pipe fixing structure, since a part of the outer peripheral surface of the heat pipe is exposed outside the holding groove, there is a problem that a sufficient heat transfer area cannot be secured. . Further, since the heat receiving block and the heat pipe are fixed with the adhesive, the adhesive may increase the thermal resistance, and may hinder heat transfer between the heat receiving block and the heat pipe. Therefore, by providing a hole in the heat receiving block and inserting a heat pipe into this hole, it is conceivable to increase the contact area between the heat receiving block and the heat pipe, that is, the heat transfer area. There was another problem that the insertion resistance at the time of insertion became large and the heat receiving block and the heat pipe could not be fixed smoothly, which was not practical.

The present invention has been made in view of the above circumstances, and aims to improve the heat transfer performance between a heat exchange member and a heat pipe, and to easily fix the heat exchange member to the heat pipe. It is an object to provide a possible heat pipe fixing structure and fixing method.

[0008]

Means for Solving the Problems and Action Therefor To achieve the above object, an invention according to claim 1 provides a heat pipe fixing structure in which a heat exchange member and a heat pipe are fixed to each other. The plurality of heat exchange members to be formed, formed in the opposing portion of each heat exchange member, and a holding groove for holding the heat pipe, and formed by extruding at least one of the heat exchange members. A locking projection, a locking hole into which at least one of the heat exchange members is formed by punching, and a locking hole into which the locking projection is inserted; The heat exchange member having a blind hole has a caulking portion for positioning and fixing the plurality of heat exchange members in the thickness direction.

According to a second aspect of the present invention, in addition to the configuration of the first aspect, at least one of the heat exchange members is a heat sink having radiating fins erected on a base plate.

According to a third aspect of the present invention, there is provided a heat pipe fixing method for fixing a heat exchange member and a heat pipe, wherein a step of forming a holding groove at a portion where a plurality of materials to be heat exchange members are to be brought into contact with each other; Extruding at least one of the materials, forming a heat exchange member having a locking projection projecting in the thickness direction by flowing the material, and punching at least one of the materials in the thickness direction. Thus, the step of forming a heat exchange member having a locking hole, and disposing the heat pipe in the holding groove, and a heat exchange member having the locking projection and a heat exchange member having the locking hole. Inserting the locking projection into the locking hole by relative movement, and plastically deforming the tip of the locking projection inserted into the locking hole to form a caulked portion, thereby forming the heat exchange member. Between Fixing the heat exchange members to each other in a thickness direction thereof while the heat pipe is held between the contact portions.

According to a fourth aspect of the present invention, in addition to the configuration of the third aspect, at least one of the heat exchange members is a heat sink having radiating fins erected on a base plate, and an area where the radiating fins are arranged on the base plate. The locking projection is formed by extruding a protruding portion that protrudes further outward.

According to the first or third aspect of the present invention,
The heat pipe is in contact with the plurality of heat exchange members over the entire circumference, and the heat transfer area between the heat pipe and the heat exchange member is increased. Further, the caulking portion is locked to the heat exchange member, the heat exchange members are fixed in the thickness direction, and the heat pipe and the plurality of heat transfer members are fixed to each other by the sandwiching force. An increase in thermal resistance between the exchange member and the exchange member is suppressed. Furthermore, since the heat pipe is configured to be sandwiched by a plurality of heat transfer members, when the plurality of heat transfer members and the heat pipe are fixed to each other, the heat pipe is inserted into the holding groove in the depth direction. It is possible to

According to the second aspect of the present invention, in addition to the same effect as that of the first aspect, a heat transfer area between the heat pipe and the heat sink is enlarged.

According to the fourth aspect of the present invention, in addition to the same effect as in the third aspect, since the protruding portion outside the radiation fin is extruded to form the locking projection, the extruding process is performed. The load at the time is prevented from acting on the radiation fins, and the load when forming the caulked portion at the tip of the locking projection is received by the overhanging portion.

[0015]

Next, a fixing structure of a heat pipe and a fixing method thereof will be described with reference to the accompanying drawings. FIG. 1 is a front sectional view showing an example in which the heat pipe fixing structure is used as a cooling system for an electronic device (for example, a notebook computer), and FIG. 2 is a view showing the fixing of the heat pipe shown in FIG. It is a perspective view of a structure. The heat pipe 1 is fixed to the two heat receiving blocks 2 and 3. The heat pipe 1 is vacuum-degassed inside a sealed container such as a metal pipe.
Water, alcohol, methanol, acetone, ammonia,
It is a known one in which a condensable fluid such as helium, sodium, or nitrogen is sealed as a working fluid.

Examples of the material of the container constituting the heat pipe 1 include copper, aluminum, steel, stainless steel, nickel, titanium, and inconel. In addition, a wick (not shown) for promoting the reflux of the working fluid can be provided inside the container of the heat pipe 1. The heat pipe 1 having the above configuration has an evaporating section (in other words, a heating section) 4 and a condensing section (in other words, a cooling section) 5. The evaporator 4 of the heat pipe 1 is sandwiched between the two heat receiving blocks 2 and 3.

Each of the heat receiving blocks 2 and 3 is made of a metal material having excellent heat conductivity, for example, aluminum, aluminum alloy, copper, copper alloy and the like. First,
One of the heat receiving blocks 2 is formed in a plate shape, and its planar shape is configured to be substantially rectangular. A holding groove (recess) 6 is formed on a surface of the heat receiving block 2 in contact with the heat receiving block 3. The holding groove 6 is arranged at a position connecting substantially the centers of two parallel sides of the heat receiving block 2 and has a substantially rectangular front shape. That is, the inner surface shape of the holding groove 6 is set corresponding to the outer peripheral shape of the heat pipe 1, and the outer surface of the heat pipe 1 is in contact with the inner surface of the holding groove 6.

On the contact surface of the heat receiving block 2 with the heat receiving block 3, a locking projection 7 projecting in the thickness direction of the heat receiving block 2, that is, toward the heat receiving block 3 is formed. In FIG. 2, the locking projections 7 are formed inside the four corners of the heat receiving block 2, respectively.
The length and shape of these four locking projections 7 are set identically. Specifically, each locking projection 7 is formed in a substantially cylindrical shape, and an annular rib 8
Are formed. The length of the locking projection 7 is the heat receiving block 3.
The thickness is set to be the same as On the other hand, heat receiving block 2
A concave portion 9 is formed on the side opposite to the contact surface with the heat receiving block 3 in FIG. The recesses 9 are respectively arranged inside the four corners of the heat receiving block 2. That is, the four concave portions 9 are provided at positions corresponding to the respective locking projections 7 in a number corresponding to the respective locking projections 7.

The other heat receiving block 3 is formed in a plate shape, and its planar shape is set to be the same as that of the heat receiving block 2. The heat receiving block 3 is in contact (close contact) with the surface of the heat receiving block 2 on which the locking projection 7 is formed. The heat receiving block 3 has a locking hole 9A penetrating in the thickness direction. The locking holes 9A are formed at positions corresponding to the respective locking projections 7 by the number corresponding to the respective locking projections 7. In the region on the tip side of each locking projection 7 in each locking hole 9A, An annular locking groove 10 is formed. Each locking projection 7 is separately arranged in the locking hole 9A, and the annular rib 8 is locked in the annular locking groove 10.

In this way, the heat receiving block 2 and the heat receiving block 3 are fixed to each other in the plane direction and the thickness direction by the locking force between each locking projection 7 and each locking hole 9A. The heat pipe 1 is held by the heat receiving blocks 2 and 3 to prevent the heat pipe 1 from moving in the thickness direction of the heat receiving blocks 2 and 3. That is, the entire circumference of the evaporator 4 of the heat pipe 1 is in contact with the heat receiving blocks 2 and 3. The heat receiving block 2
When the heat receiving block 3 and the heat receiving block 3 are fixed to each other, the distal end surface of each locking projection 7 and the surface of the heat receiving block 3 are substantially flush.

Here, a method of fixing the heat pipe 1 and the heat receiving blocks 2 and 3 will be described. First, while holding the metal plate 11 as shown in FIG. 3 by a die (not shown), the metal plate 11 is pressed by a punch (not shown), and one of the metal plates 11 is pressed as shown in FIG. The holding groove 6 is formed on the surface. Next, a cylindrical punch 1
2, the metal plate 11 is pressed (specifically, extruded in the thickness direction) to form recesses 9 inside the four corners of the metal plate 4. Note that the holding groove 6 may be formed after forming the recess 9, or the recess 9 and the holding groove 6 may be formed simultaneously. As a result of the formation of the concave portion 9, the material of the metal plate 11 flows, and a projection 13 is formed on the opposite side of the concave portion 9. Thus, the heat receiving block 2 is manufactured. On the other hand, by pressing (punching) a part of a metal plate (not shown) in the thickness direction, the locking hole 9A and the annular recess 10 are formed.
Is manufactured.

Then, as shown in FIG. 5, the heat pipe 1 is arranged in the holding groove 6 of the heat receiving block 2 and
The heat receiving block 2 and the heat receiving block 3 are relatively moved in a direction to approach each other. Then, each locking projection 7 enters each recess 9, and the surface of the heat receiving block 2 and the heat receiving block 3
Stops when it comes into contact with the surface of At this time, since the tips of the locking projections 7 are exposed outside the locking holes 9A, the annular ribs 8 are formed by caulking (ie, plastically deforming) the tips of the locking projections 7. . This rib 8
Is locked to the heat receiving block 3, whereby the heat receiving block 2 and the heat receiving block 3 are positioned in the thickness direction and the plane direction.

In this way, the heat pipe 1 and the heat receiving blocks 2 and 3 are fixed, and as shown in FIGS.
It is used with the surface of the heat receiving block 3 in close contact with the heating element 14. As the heating element 14, an arithmetic processing unit (CPU or MPU) is exemplified. Then, when the heat of the heating element 14 is transmitted to the evaporating section 4 of the heat pipe 1, the heat pipe 1 operates due to a temperature difference generated therein.
Specifically, while the working fluid evaporates in the evaporating section 4,
By flowing to the condensing section 5 and radiating and condensing the heat, the heat is transferred as the latent heat of the working fluid, and the heating element 14 is prevented from being overheated (ie, cooled).

The apparent thermal conductivity of the heat pipe 1 is as follows:
It is superior to metal such as copper or aluminum by about several tens to several hundreds times, and therefore, the cooling performance for the heating element 14 is improved. Here, the correspondence between the configuration of FIGS. 1 to 5 and the configuration of the present invention will be described. Heat receiving blocks 2 and 3
Correspond to the heat exchange member of the present invention, the annular rib 8 corresponds to the swaged portion of the present invention, and the metal plate corresponds to the material of the present invention.

As described above, according to the fixing structure of the heat pipe 1 shown in FIGS. 1 and 2 or the fixing method of the heat pipe 1 shown in FIGS. , The heat transfer area between the heat pipe 1 and the heat receiving blocks 2 and 3 is enlarged, and the heat transfer function is improved. The heat receiving blocks 2 and 3 are positioned and fixed in the thickness direction, and the heat pipe 1 and the heat receiving blocks 2 and 3 are fixed to each other by the clamping force. Therefore, an increase in the thermal resistance between the heat pipe 1 and the heat receiving blocks 2 and 3 is suppressed, and the heat transfer performance between the heat pipe 1 and the heat receiving blocks 2 and 3 is favorably maintained.

Further, since the heat pipe 1 is sandwiched between the heat receiving blocks 2 and 3, when the heat receiving blocks 2 and 3 and the heat pipe 1 are fixed to each other, the heat pipe 1 is In the depth direction (that is,
(In the radial direction of the heat pipe 1), the frictional resistance of disposing the heat pipe 1 in the holding groove 6 is suppressed, and the fixing operation between the heat pipe 1 and the heat receiving blocks 2 and 3 can be performed smoothly and It can be done quickly.

1 and 2, the heating element 14
It is also possible to use the heat receiving block 2 in contact therewith. Also, in the embodiment of FIGS.
It is also possible to form a locking projection only on the heat receiving block 3 that contacts the heating element 14 and to form a locking hole on the heat receiving block 3 that does not contact the heating element 14. Furthermore, it is also possible to form locking projections on both the heat receiving blocks 2 and 3 and form locking holes on both the heat receiving blocks 2 and 3. Further, the holding groove may be formed only in the heat receiving block 3,
The holding groove may be formed over both the heat receiving block 2 and the heat receiving block 3.

FIG. 6 shows a heat pipe 1 and a heat sink 2.
FIG. 7 is a perspective view showing another embodiment in which a structure for fixing 0 is used in a cooling system, FIG. 7 is a sectional view of FIG.
FIG. 8 is a sectional view showing a fixing method corresponding to FIGS. 6 and 7. The heat sink 20 has a base plate 22 having a plurality of radiating fins 21 and a support plate 23 which sandwiches the heat pipe 1 in cooperation with the base plate 22.

Base plate 22 and radiation fins 21
Each of the support plates 23 is made of a metal material having excellent thermal conductivity, such as aluminum, an aluminum alloy, copper, or a copper alloy. First, the base plate 22 is formed into a plate shape, and its planar shape is configured to be substantially square. Then, the base plate 22
On one surface, a plurality of radiating fins 21 are erected at predetermined intervals in the thickness direction. The plurality of radiation fins 2
The shape of 1 is substantially rectangular, and one end of the radiation fin 21 is embedded in the base plate 22, and the base plate 22 and the radiation fin 21 are integrated.

An engagement projection 24 protruding toward the support block 23 is formed on a surface of the base plate 22 that contacts the support block 23. The locking projections 24 are formed inside the four corners of the base plate 22, respectively. The length and shape of each locking projection 24 are set identically. Specifically, each locking projection 24 is formed in a substantially cylindrical shape, and an annular rib 25 is formed on the outer periphery of the tip of each locking projection 24.

A recess 26 is formed on the base plate 22 on the side opposite to the contact surface with the support block 23. The recesses 26 are formed inside the four corners of the base plate 22, respectively. These four recesses 26
A number corresponding to each locking projection 24 is formed at a position corresponding to each locking projection 24. More specifically, the protruding portion 22 </ b> A that protrudes outside the area where the heat radiation fins 21 are arranged on the base plate 22 (that is, the substantially rectangular arrangement area).
Each concave portion 26 is formed.

A holding groove 27 is formed on a surface of the support block 23 that abuts against the base plate 22. The holding groove 27 is arranged at a position connecting substantially the centers of two parallel sides of the support block 23, and the front shape of the holding groove 27 is configured to be substantially rectangular. That is, the inner surface shape of the holding groove 27 is set corresponding to the outer peripheral shape of the heat pipe 1, and the outer peripheral surface of the heat pipe 1 is in contact with the inner surface of the holding groove 27.

The support block 23 is formed in a plate shape, and has a square planar shape. The support block 23 is in contact (close contact) with the surface of the base plate 22 on which the locking projection 24 is formed. The support block 23 is formed with a locking hole 28 penetrating in the thickness direction. This locking hole 28 is
Are located inside the four corners. That is, the number of these four locking holes 28 corresponding to each locking projection 24 is formed at a position corresponding to each locking projection 24. Further, in the region on the tip side of each locking projection 24 in each locking hole 28,
An annular locking groove 29 is formed. Each locking projection 24 is arranged in each locking hole 28, and each annular rib 25 is locked in each annular locking groove 29.

In this way, the base plate 22 and the support block 23 are fixed to each other in the thickness direction and the plane direction by the locking force between each locking projection 24 and each locking hole 28. The heat pipe 1 is sandwiched between the base plate 22 and the support block 23 to prevent the heat pipe 1 from moving in the thickness direction of the base plate 22. That is, the condensing section 5 of the heat pipe 1 is in contact with the base plate 22 and the support block 23 over the entire circumference. In a state where the base plate 22 and the support block 23 are fixed to each other,
The distal end surface of each locking projection 24 and the surface of the support block 23 are set substantially flush.

Next, the heat sink 20 shown in FIGS.
A method for fixing the heat pipe 1 and the heat pipe 1 will be specifically described. First, as shown in FIG.
In addition, the base plate 22 having the projections 30 is manufactured. The base plate 22 has a plurality of radiating fins 21 embedded in one surface of a metal plate by a processing method such as a pressure casting method or a die casting method. in this case,
A first method of processing the concave portion 26 after integrating the base plate 22 and the radiation fin 21 and a second method of integrating the radiation fin 21 with the base plate 22 having the concave portion 26 are exemplified.

Here, even in the case where the first method is adopted, the projections 22A are extruded in the thickness direction to form the recesses 26, and the projections 30 are formed by the material flow.
In the step of forming the concave portion 26 and the projection 30, the processing load due to the punch is
And the deformation of the radiation fins 21 can be suppressed.

On the other hand, the supporting block 23 having the holding groove 27 and the locking hole 28 is manufactured by pressing the metal plate. Then, the heat pipe 1 is arranged in the holding groove 27 and the base plate 22 and the support block 23 are brought close to each other. As a result, the projection 30 becomes the locking hole 28
At the same time, the surface of the base plate 22 and the surface of the support block 23 come into contact with each other and stop. afterwards,
When the annular rib 25 is formed by plastically deforming the tip of the projection 30, the base plate 21 and the support block 23
It is positioned and fixed in its thickness direction and plane direction. Here, the correspondence between the embodiments of FIGS. 6 to 8 and the present invention will be described. Base plate 22 and support block 23
Is equivalent to the heat exchange member of the present invention, the metal plate is equivalent to the material of the present invention, and the annular rib 25 is equivalent to the caulked portion of the present invention.

The heat pipe 1 and the heat sink 20 fixed as described above are used as shown in FIG. That is, the evaporator (not shown) of the heat pipe 1 is disposed on the side of the heating element (not shown). In this case, it is also possible to employ the heat pipe fixing structure shown in FIGS. 1 and 2 for the evaporating section. The heat transmitted from the evaporator of the heat pipe 1 to the condenser 5 due to the heat generated by the heat generator is transmitted to the base plate 21 and the support block 23, and the heat is radiated into the air through the radiator fins 21. Then, the working fluid inside the heat pipe 1 is condensed and returned to the evaporator. In this way, overheating of the heating element is suppressed.

As described above, according to the fixing structure of the heat pipe 1 shown in FIGS. 6 and 7 or the fixing method shown in FIG. 8, the base plate 22 and the support block 23 are fixed by the locking projections 24 and the ribs 25. It is positioned and fixed in the thickness direction and the plane direction. As a result, heat pipe 1
Are held between the base plate 22 and the support block 23. For this reason, the heat transfer area in the condensing section 5 of the heat pipe 1 is enlarged, the heat radiation efficiency is improved, and the cooling function of the heat generating element is improved. In addition, since the heat pipe 1 is directly sandwiched and fixed between the base plate 22 and the support block 23, there is no interfering substance between the heat pipe 1 and the base plate 22 and the support block 23 that hinders heat transfer. Therefore, the heat transfer performance from the heat pipe 1 to the base plate 22 and the support block 23 is further improved.

Further, since the heat pipe 1 is sandwiched between the base plate 22 and the support block 23, the heat pipe 1 can be moved and inserted in the depth direction of the holding groove 27. Therefore, the frictional resistance between the heat pipe 1 and the holding groove 6 is suppressed, and the fixing operation between the heat pipe 1 and the base plate 22 and the support block 23 can be performed smoothly and quickly. Further, the recesses 26, the projections 30, and the locking projections 24 are formed by extrusion on the protruding portions 22A that protrude outside the area where the heat radiation fins 21 are arranged. The locking projection 24 is caulked to form a rib 25. For this reason, since the load at the time of these forming processes is not received by the overhang portion 22 and transmitted to the radiation fins 21, deformation of the radiation fins 21 is avoided.

In the embodiments shown in FIGS. 6 to 8,
It is also possible to form a locking projection only on the support block 23 and form a locking hole only on the base plate 22. Further, it is also possible to form locking projections on both the base plate 22 and the support block 23 and form locking holes on both the base plate 22 and the support block 23. Further, the holding groove may be formed only in the support block 23, or the holding groove may be formed over both the base plate 22 and the support block 23.

In each of the above embodiments, a flat heat pipe is illustrated, but this embodiment is applicable to any of a cylindrical heat pipe, a long heat pipe, and a micro heat pipe. is there. in this case,
Needless to say, the shape of the holding groove is set corresponding to the shape of the outer peripheral surface of the heat pipe. Further, it is also possible to adopt a configuration in which a holding groove is formed at a contact portion of three or more heat exchange members, and the heat pipe is held by the holding groove. Furthermore, the fixing structure and the fixing method of the heat pipe according to this embodiment can be applied to a heating system and a heat transport system.

[0043]

As described above, according to the first or third aspect of the present invention, the heat pipe is in contact with the plurality of heat exchange members over the entire circumference, and the heat between the heat pipe and the heat exchange member is reduced. The transmission area increases. Further, the caulking portion is locked to the heat exchange member, the heat exchange members are fixed in the thickness direction, and the heat pipe and the plurality of heat transfer members are fixed to each other by the sandwiching force. An increase in thermal resistance between the exchange member and the heat exchanger is suppressed, and the heat transfer function is further improved. Furthermore, since the heat pipe is configured to be sandwiched by a plurality of heat transfer members, when the plurality of heat transfer members and the heat pipe are fixed to each other, the heat pipe is inserted into the holding groove in the depth direction. It is possible to Therefore, the frictional resistance between the heat pipe and the holding groove is suppressed, and the fixing operation between the heat pipe and the heat exchange member can be performed smoothly and quickly.

According to the second aspect of the present invention, in addition to obtaining the same effects as the first aspect, the heat transfer area between the heat pipe and the heat sink is enlarged.

According to the fourth aspect of the present invention, in addition to obtaining the same effect as the third aspect, since the protruding portion outside the radiating fin is extruded to form the locking projection, this extrusion is achieved. The load at the time of processing is prevented from acting on the radiating fins, and the load at the time of forming the caulked portion at the tip of the locking projection is received by the overhanging portion. Therefore, the load at the time of extruding the material and at the time of the plastic deformation of the locking projection does not act on the radiation fin, and the deformation of the radiation fin is suppressed.

[Brief description of the drawings]

FIG. 1 is a front sectional view showing an embodiment of a heat pipe fixing structure according to the present invention.

FIG. 2 is a perspective view showing a fixing structure of the heat pipe shown in FIG.

FIG. 3 is a front sectional view showing an embodiment of a heat pipe fixing method according to the present invention.

FIG. 4 is a front sectional view showing an embodiment of a heat pipe fixing method according to the present invention.

FIG. 5 is a front sectional view showing an embodiment of a heat pipe fixing method according to the present invention.

FIG. 6 is a perspective view showing another embodiment of the heat pipe fixing structure according to the present invention.

FIG. 7 is a front sectional view of the heat pipe fixing structure shown in FIG. 6;

FIG. 8 is a front sectional view showing another embodiment of the heat pipe fixing method according to the present invention.

[Explanation of symbols]

1 ... heat pipe, 2, 3 ... heat receiving block, 6, 2
Reference numeral 7: holding groove, 7, 24: locking projection, 8, 25: rib, 9A: locking hole, 20: heat sink, 21: heat radiation fin, 22: base plate, 22A: overhang, 23: support block.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Tan Nuen 1-5-1, Kiba, Koto-ku, Tokyo Inside Fujikura Co., Ltd. (72) Inventor Kazuyasu Takabashi 1-5-1, Kiba, Koto-ku, Tokyo Shares F-term in Fujikura (reference) 5F036 AA01 BB05 BB60

Claims (4)

[Claims] 1. A heat pipe fixing structure in which a heat exchange member and a heat pipe are fixed to each other, wherein the heat exchange member is formed at a plurality of heat exchange members abutting on each other, and at a portion facing each heat exchange member, and Holding groove for holding the heat pipe, a locking projection formed by extruding at least one of the heat exchange members, and formed by punching at least one of the heat exchange members, In addition, the locking hole into which the locking protrusion is inserted, and the tip of the locking protrusion is plastically deformed and locked to the heat exchange member having the locking hole, so that the plurality of heat exchange members are connected to each other. A heat pipe fixing structure having a caulking portion for positioning and fixing in a thickness direction. 2. The heat pipe fixing structure according to claim 1, wherein at least one of the heat exchange members is a heat sink in which a radiation fin is provided upright on a base plate. 3. A method of fixing a heat pipe for fixing a heat exchange member and a heat pipe, comprising: forming a holding groove at a portion where a plurality of materials to be heat exchange members are to be brought into contact with each other; Forming a heat exchange member having a locking projection projecting in the thickness direction by the flow of the material, and punching at least one of the materials in the thickness direction to form a locking hole. And forming the heat pipe in the holding groove, and relatively moving the heat exchange member having the locking projection and the heat exchange member having the locking hole. A step of inserting a locking projection into the locking hole; and forming a caulked portion by plastically deforming a tip of the locking projection inserted into the locking hole, thereby forming a contact portion between the heat exchange members. By Serial while holding the heat pipe, the method of fixing the heat pipe; and a step of fixing to each other the heat exchange members together in the thickness direction. 4. A heat sink wherein at least one of the heat exchange members is a heat sink having a radiating fin standing on a base plate, and extruding a projecting portion of the base plate which protrudes outside a region where the radiating fin is arranged. The fixing method of a heat pipe according to claim 3, wherein the locking projection is formed by: