JP2008130702A - Heat sink with joint - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hat sink with a joint which thermally joins a heat receiving member and a heat radiating member with a three-dimensional thermal movability. <P>SOLUTION: The heat sink with a joint includes a joint block which has one surface thermally coupled with a heating member and has the other surface as a spherical projection surface, a metallic block having one surface as a spherical recessed surface to be fitted with the spherical projected surface and to be slidable along the projected surface, a heat pipe having one surface thermally connected with a heat radiating fin and having the other end thermally connected to the metallic block to be embedded therein with the pipe bent downwards, and a resilient holding means for resiliently holding the metallic block to the joint block in such a manner that the spherical projected surface is slidably fitted in the spherical recessed surface. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a heat sink with a joint for radiating heat from various electric and electronic components, and in particular, with a joint that can rotate around a single point while ensuring a sufficient contact area with the heat receiving portion and the heat radiating portion. Regarding heat sink.

  Various heat sinks using heat pipes have been proposed and put into practical use in order to cool heat-generating electrical / electronic components such as semiconductor modules mounted on various devices. One of the advantages of using a heat pipe is that the heat of the electric / electronic component to be radiated can be moved to another place and radiated to the outside at that place.

  For example, a part to be cooled of an electric / electronic component mounted on a personal computer is usually installed inside the personal computer, and therefore it may not be desirable to dissipate heat around the electric / electronic component. That is, when the electric / electronic component is mounted in the casing of the apparatus, there is a problem that heat is trapped in the casing when heat is dissipated around the electric / electronic component.

  Therefore, to achieve efficient cooling, it is necessary to carry heat to the outside of the container. Therefore, the following structure has been proposed and put into practical use as a typical heat sink using a heat pipe. That is, a heat receiving member (metal plate or the like) is thermally connected to a component to be cooled mounted inside the device, a heat receiving portion of a heat pipe is connected to the heat receiving member, and a heat radiating portion of the heat pipe is connected to, for example, an external device Or it is the structure etc. which are connected to heat radiating members, such as the fin for heat radiation installed in the exterior vicinity.

  By the way, the component to be cooled mounted inside the device may be attached to the device or the fin for heat dissipation in a movable state. As an example, there is a case where a heat generating component such as an IC chip is mounted on the main body side (keyboard side) of a notebook personal computer, and the heat is dissipated to the outside through the openable display portion.

Japanese Laid-Open Patent Publication No. 10-187284 discloses a structure in which a plurality of heat pipes are connected with a hinge structure in order to apply a heat sink to a notebook personal computer body and a display unit that are connected in an openable / closable manner.
Furthermore, Japanese Patent Application Laid-Open No. 11-173773 and Japanese Utility Model Application No. 2-62274 disclose heat pipe application technology in which two heat pipes are connected to make the positional relationship between the heat receiving member and the heat radiating member movable or adjustable. It is disclosed. In the structure disclosed in JP-A-11-173773, a plurality of heat pipes are connected using a heat pipe with a universal joint.

In the structure disclosed in Japanese Utility Model Laid-Open No. 2-62274, separate heat pipes are attached to the fitting body and the connector main body, and the fitting body and the connector main body are tightened with screws and nuts to be closely fixed. Therefore, although the structure is different from the structure in which the heat pipes are movably connected, if necessary, the position of the two heat pipes can be changed by loosening the screws and nuts, changing the position, and fixing them again. Adjustment is possible.
Japanese Patent Laid-Open No. 10-187284 Japanese Patent Laid-Open No. 11-173773 Japanese Utility Model Publication No. 2-62274

  In the conventional structure described above, two heat pipes are connected in a movable manner, and the heat receiving member and the heat radiating member connected to each of them are moved. However, all of them are only movable with respect to the heat receiving member within a plane where the heat radiating member is located. Therefore, it could not be used for applications that require a movable state with a higher degree of freedom.

  Accordingly, an object of the present invention is to provide a heat sink with a joint for thermally connecting a heat receiving member and a heat radiating member with three-dimensional mobility.

    The inventor has conducted extensive research to solve the above-described conventional problems. As a result, by combining a joint block having a spherical convex surface on one surface and a metal block having a concave surface corresponding to the convex surface on one surface and slidable along the convex surface, the convex surface and the concave surface Thus, it has been found that by incorporating a heat pipe into the metal block, the heat receiving member and the heat radiating member can be thermally connected with three-dimensional mobility.

  Furthermore, it has been found that the top heat mode can be avoided by inclining the end of the heat pipe embedded in the metal block upward or downward, providing a step in the heat pipe, or curving in an annular shape. The present invention has been made based on the research results described above.

According to a first aspect of the heat sink with joint of the present invention, a heat dissipation fin portion is thermally connected to one surface, and a joint block having a spherical convex surface on the other surface;
A metal block having a spherical concave surface corresponding to the convex surface on one surface and slidable along the convex surface;
A heat pipe having one end thermally connected to the heating element and the other end curved upward and embedded in the metal block and thermally connected;
It is a heat sink with a joint provided with the elastic fixing means which fixes the metal block to the joint block with elasticity so that the convex surface and the concave surface can slide.

According to a second aspect of the heat sink with joint of the present invention, a heat dissipation fin portion is thermally connected to one surface, and a joint block having a spherical concave surface on the other surface;
A metal block having a spherical convex surface corresponding to the concave surface on one surface and slidable along the concave surface;
A heat pipe having one end thermally connected to the heating element and the other end curved upward and embedded in the metal block and thermally connected;
It is a heat sink with a joint provided with elastic fixing means for fixing the metal block to the joint block with elasticity so that the concave surface and the convex surface can slide.

  According to a third aspect of the heat sink with joint of the present invention, the end of the heat pipe that is thermally connected to the radiating fin portion is inclined upward so as to avoid the top heat mode. It is a heat sink with.

  According to a fourth aspect of the heat sink with joint of the present invention, a step is formed at a predetermined position of the heat pipe so that an end side thermally connected to the radiating fin portion is higher, and a top heat mode is avoided. It is a heat sink with a joint arrange | positioned.

According to a fifth aspect of the heat sink with a joint of the present invention, a joint block having a heating element thermally connected to one surface and a spherical convex surface on the other surface;
A metal block having a spherical concave surface corresponding to the convex surface on one surface and slidable along the convex surface;
One end portion is thermally connected to the radiation fin portion, and the other end portion is curved downward and embedded in the metal block and thermally connected,
It is a heat sink with a joint provided with the elastic fixing means which fixes the metal block to the joint block with elasticity so that the convex surface and the concave surface can slide.

A sixth aspect of the heat sink with joint of the present invention is a joint block in which a heating element is thermally connected to one surface and a spherical concave surface is provided on the other surface;
A metal block having a spherical convex surface corresponding to the concave surface on one surface and slidable along the concave surface;
One end portion is thermally connected to the radiation fin portion, and the other end portion is curved downward and embedded in the metal block and thermally connected,
It is a heat sink with a joint provided with elastic fixing means for fixing the metal block to the joint block with elasticity so that the concave surface and the convex surface can slide.

  A seventh aspect of the heat sink with joint according to the present invention is a heat sink with joint which is embedded in the metal block and thermally connected in a state where the other end of the heat pipe is curved in an annular shape. .

  An eighth aspect of the heat sink with joint of the present invention is a heat sink with joint in which the metal block is rotatable with respect to the joint block and the heat pipe is embedded in the metal block.

  A ninth aspect of the heat sink with joint of the present invention is the heat sink with joint, wherein the joint block includes a stopper that stops sliding of the metal block along the convex surface of the joint block.

  A tenth aspect of the heat sink with joint of the present invention is the heat sink with joint, wherein the joint block includes a stopper that stops sliding of the metal block along the concave surface of the joint block.

  According to this invention, by combining a joint block having a spherical convex surface on one surface and a metal block having a spherical concave surface corresponding to the convex surface on one surface and slidable along the convex surface. The convex surface and the concave surface are slidable. Therefore, by embedding the heat pipe in the metal block, the heat receiving member and the heat radiating member can be thermally connected with three-dimensional mobility.

  The same effect can be obtained by providing a concave surface on the joint block and providing a convex surface on the metal block. Furthermore, by providing a spherical concave or convex surface, it is possible to reduce the thickness of the joint block while ensuring a sufficient contact area.

  Furthermore, the top heat mode can be easily avoided by inclining the end of the heat pipe embedded in the metal block described above upward or downward, providing a step in the heat pipe, or curving in an annular shape.

A heat sink with a joint according to the present invention will be described with reference to the drawings.
According to one aspect of the heat sink with joint of the present invention, a heat generating element is thermally connected to one surface, a joint block having a spherical convex surface on the other surface, and a concave surface corresponding to the convex surface on one surface. Equipped with a metal block slidable along the convex surface, and one end is thermally connected to the radiating fin, and the other end is curved downward and embedded in the metal block and thermally connected A heat sink with a joint comprising: a heat pipe, and an elastic fixing means for fixing the metal block to the joint block with elasticity so that the convex surface and the concave surface are slidable.

  A metal block that has a radiating fin portion thermally connected to one surface, a joint block having a spherical convex surface on the other surface, and a concave surface corresponding to the convex surface on one surface, and is slidable along the convex surface With a joint, comprising a block and a heat pipe that is thermally connected by being embedded in a metal block with one end thermally connected to the heating element and the other end curved upward It may be a heat sink. The joint block may be provided with a concave surface, and the metal block may be provided with a convex surface.

  FIG. 1 is a cross-sectional view showing one embodiment of a heat sink with a joint according to the present invention. As shown in FIG. 1, the heat sink with joint 1 of the present invention includes a joint block 2 having a heating element 9 thermally connected to one surface and a spherical convex surface 11 on the other surface, and one surface. The metal block 3 slidable along the convex surface and one end portion 8 are thermally connected to the radiating fin portion 10 and the other end portion 7 is curved downward. Elastic fixing that fixes the metal block 3 to the joint block 2 with elasticity so that the heat pipe 4 embedded in the metal block 3 and thermally connected in a state and the convex surface 11 and the concave surface 12 can slide. Means 13 are provided.

  As shown in FIG. 1, the elastic convex means 11 of the metal joint block 2 excellent in thermal conductivity is excellent in thermal conductivity by the elastic fixing means 13 comprising a support member 5 and an elastic member 6 such as a spring. The corresponding spherical concave surface 12 of the metal metal block 3 comes into slidable contact and is pressed in the direction of the arrow.

  The end 7 of the heat pipe is embedded in the metal block 3 in a state of being curved downward. A heat radiating fin portion is thermally connected to the end portion 8 of the heat pipe. In this state, the concave surface of the metal block 3 slides with the convex surface and moves up, down, left, and right with respect to the joint block 2 in a state where the radiating fin portion and the heat pipe are thermally connected.

  In the embodiment shown in FIG. 1, as described above, the end portion 7 of the heat pipe is embedded in the metal block 3 while being bent downward, and the heat pipe 4 itself is inclined upward toward the radiation fin portion 10. Has been placed. Therefore, the hydraulic fluid built in the heat pipe easily flows toward the end portion 7 embedded in the metal block 3, and so-called dryout does not occur in the heat receiving portion.

  Although not shown, a stopper that restricts sliding movement of the metal block 3 in the vertical and horizontal directions with respect to the joint block 2 within a predetermined range may be provided. That is, by providing the stopper, it is possible to prevent the concave surface of the metal block from sliding along the convex surface of the joint block other than the predetermined region.

As shown in FIG. 1, the support member 5 of the elastic fixing means 13 has a substantially L-shaped cross section and is arranged so as to cover, for example, the four circumferences of the metal block 3. Or you may provide in each part of four circumferences of a metal block. As long as the metal block can be slidably pressed against the joint block by the elastic member, the arrangement may be appropriately set. The elastic member may be a member having a predetermined elasticity such as a spring or rubber.
As described above, in the heat sink with joint of this aspect, the heat pipe can be freely moved three-dimensionally with respect to the heating element 9.

  FIG. 2 is a cross-sectional view showing another embodiment of the heat sink with joint of the present invention. As shown in FIG. 2, the heat sink with joint 1 of the present invention has a joint block 2 having a heating element 9 thermally connected to one surface and a spherical concave surface 12 on the other surface, and one surface. The metal block 3 slidable along the concave surface 12 and one end portion 8 are thermally connected to the radiating fin portion 10 and the other end portion 7 is directed downward. Elasticity that fixes the metal block 3 to the joint block 2 with elasticity so that the heat pipe embedded in the metal block 3 in a curved state and thermally connected and the concave surface 12 and the convex surface 11 can slide. A fixing means 13 is provided.

In this aspect, the spherical concave surface and the spherical convex surface of the metal block move slidably with respect to the joint block.
The other members are the same as the heat sink with joint in the above-described aspect.
Also in the heat sink with a joint of this aspect, the heat pipe can be freely moved three-dimensionally with respect to the heating element 9.

  FIG. 3 is a cross-sectional view showing another embodiment of the heat sink with joint of the present invention. As shown in FIG. 3, the joint block 2 having the radiating fin portion 10 thermally connected to one surface and the spherical convex surface 11 on the other surface, and the spherical surface corresponding to the convex surface 11 on the one surface. The metal block 3 is slidable along the convex surface 11 and the metal block 3 with one end 8 thermally connected to the heating element 9 and the other end 7 curved upward. A heat pipe 4 embedded in 3 and thermally connected, and an elastic fixing means 13 for fixing the metal block 3 to the joint block 2 with elasticity so that the convex surface 11 and the concave surface 12 can slide. I have.

  As shown in FIG. 3, the support member 5 and the elastic member 6, for example, an elastic fixing means 13 made of a spring, make the spherical convex surface 11 of the metallic joint block 2 excellent in thermal conductivity excellent in thermal conductivity. The corresponding spherical concave surface 12 of the metal metal block 3 comes into slidable contact and is pressed in the direction of the arrow.

  The end 7 of the heat pipe is embedded in the metal block 3 in a state of being curved upward. A heating element 9 is thermally connected to the end 8 of the heat pipe. Thus, with the heat generating element 9 and the heat pipe 4 thermally connected, the concave surface of the metal block 3 slides on the convex surface, and moves up, down, left, and right with respect to the joint block 2.

  In the embodiment shown in FIG. 3, as described above, the end portion 7 of the heat pipe is embedded in the metal block 3 while being bent upward, and the heat pipe 4 itself is inclined downward toward the heating element 9. Are arranged. Therefore, the hydraulic fluid contained in the heat pipe easily flows toward the end portion 8 that is thermally connected to the heating element, and so-called dryout does not occur in the heat receiving portion.

  Although not shown, a stopper that restricts sliding movement of the metal block 3 in the vertical and horizontal directions with respect to the joint block 2 within a predetermined range may be provided. That is, by providing the stopper, it is possible to prevent the concave surface of the metal block from sliding along the convex surface of the joint block other than the predetermined region.

As shown in FIG. 3, the support member 5 of the elastic fixing means 13 has a substantially L-shaped cross section and is arranged so as to cover, for example, the four circumferences of the metal block 3. Or you may provide in each part of four circumferences of a metal block. As long as the metal block can be slidably pressed against the joint block by the elastic member, the arrangement may be appropriately set. The elastic member may be a member having a predetermined elasticity such as a spring or rubber.
As described above, in the heat sink with joint of this aspect, the heat pipe can be freely moved three-dimensionally with respect to the radiating fin portion 10.

  FIG. 4 is a cross-sectional view showing another embodiment of the heat sink with joint of the present invention. As shown in FIG. 4, the heat sink with joint 1 of the present invention includes a joint block 2 having a heat radiation fin portion 10 thermally connected to one surface and a spherical concave surface 12 on the other surface, The metal block 3 having a spherical convex surface 11 corresponding to the concave surface on the surface and slidable along the concave surface 12, one end 8 is thermally connected to the heating element 9, and the other end 7 is The heat pipe 4 embedded in the metal block 3 in a curved state upward and thermally connected, and the concave surface 12 and the convex surface 11 are slidable, and the metal block 3 is provided with elasticity in the joint block 2. Elastic fixing means 13 for fixing.

In this aspect, the spherical concave surface and the spherical convex surface of the metal block move slidably with respect to the joint block.
The other members are the same as the heat sink with joint in the above-described aspect.
Also in the heat sink with a joint of this aspect, the heat pipe can be freely moved three-dimensionally with respect to the radiation fin portion 10.

  FIG. 5 is a diagram for explaining another shape of the end portion of the heat pipe embedded in the metal block. As shown in FIG. 5 (a), the end of the heat pipe is curved in an annular shape and embedded in the metal block 3. Even if the spherical concave surface or convex surface of the metal block is slid along the corresponding spherical convex surface or concave surface of the joint block (not shown) and the heat pipe rotates, for example, FIG. As shown in (b), a part of the working fluid always remains at the end of the heat pipe to prevent so-called dryout.

  According to this invention, the heat sink with a joint for the heat receiving member and the heat radiating member to be thermally coupled with three-dimensional mobility can be provided.

FIG. 1 is a cross-sectional view showing one embodiment of a heat sink with a joint according to the present invention. FIG. 2 is a cross-sectional view showing another embodiment of the heat sink with joint of the present invention. FIG. 3 is a cross-sectional view showing another embodiment of the heat sink with joint of the present invention. FIG. 4 is a cross-sectional view showing another embodiment of the heat sink with joint of the present invention. FIG. 5 is a diagram for explaining another shape of the end portion of the heat pipe embedded in the metal block.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heat sink with joint 2 Joint block 3 Metal block 4 Heat pipe 5 Support member 6 Elastic member 7 End part 8 of heat pipe 9 End part 9 of heat pipe Heating element 10 Radiation fin part 11 Spherical convex part 12 Spherical shape Recess 13 elastic fixing means

Claims (12)

A joint block having a radiating fin portion thermally connected to one surface and a spherical convex surface on the other surface;
A metal block having a spherical concave surface corresponding to the convex surface on one surface and slidable along the convex surface;
A heat pipe having one end thermally connected to the heating element and the other end curved upward and embedded in the metal block and thermally connected;
A heat sink with a joint, comprising elastic fixing means for fixing the metal block to the joint block with elasticity so that the convex surface and the concave surface can slide. A heat dissipation fin part is thermally connected to one surface, and a joint block having a spherical concave surface on the other surface;
A metal block having a spherical convex surface corresponding to the concave surface on one surface and slidable along the concave surface;
A heat pipe having one end thermally connected to the heating element and the other end curved upward and embedded in the metal block and thermally connected;
A heat sink with a joint, comprising elastic fixing means for fixing the metal block to the joint block with elasticity so that the concave surface and the convex surface can slide.   The heat sink with a joint according to claim 1 or 2, wherein an end portion of the heat pipe that is thermally connected to the radiation fin portion is inclined upward to avoid a top heat mode.   The predetermined step of the heat pipe, a step is formed so that an end side thermally connected to the radiating fin portion is higher, and the heat pipe is arranged to avoid a top heat mode. Heat sink with joint as described. A joint block having a heating element thermally connected to one surface and a spherical convex surface on the other surface;
A metal block having a spherical concave surface corresponding to the convex surface on one surface and slidable along the convex surface;
One end portion is thermally connected to the radiation fin portion, and the other end portion is curved downward and embedded in the metal block and thermally connected,
A heat sink with a joint, comprising elastic fixing means for fixing the metal block to the joint block with elasticity so that the convex surface and the concave surface can slide. A joint block having a heating element thermally connected to one surface and a spherical concave surface on the other surface;
A metal block having a spherical convex surface corresponding to the concave surface on one surface and slidable along the concave surface;
One end portion is thermally connected to the radiation fin portion, and the other end portion is curved downward and embedded in the metal block and thermally connected,
A heat sink with a joint, comprising elastic fixing means for fixing the metal block to the joint block with elasticity so that the concave surface and the convex surface can slide.   The heat sink with a joint according to claim 5 or 6, wherein an end portion of the heat pipe that is thermally connected to the radiating fin portion is inclined upward to avoid a top heat mode.   The step according to claim 5 or 6, wherein a step is formed so that an end side thermally connected to the radiating fin portion is higher at a predetermined position of the heat pipe, and a top heat mode is avoided. Heat sink with joint as described.   The heat sink with a joint according to claim 5 or 6, wherein the other end portion of the heat pipe is embedded in the metal block and thermally connected in a state of being annularly curved.     The heat sink with joint according to claim 9, wherein the heat pipe is embedded in the metal block so that the metal block can rotate with respect to the joint block.   The heat sink with a joint according to claim 5 or 10, wherein the joint block includes a stopper that stops sliding of the metal block along the convex surface of the joint block. The heat sink with a joint according to claim 6 or 10, wherein the joint block includes a stopper that stops sliding of the metal block along the concave surface of the joint block.

Images