Abstract:
The present invention is an apparatus for dissipating heat through a heat sink, the apparatus comprising: a heat transfer member having one end with a contact surface contacting a heating element arranged on a substrate and the other end with a contact surface contacting the heat sink, the heat transfer member transferring the heat generated from the heating element to the heat sink; an elastic member for providing elastic force for pushing the heat transfer member toward the heating element; a guide member arranged in the heat sink to form a contact surface contacting the heat transfer member, the guide member mechanically guiding the heat transfer member such that the heat transfer member may slide and move toward the heating element; and a spacing member inserted between the substrate and the heat sink so as to maintain a preset spacing when the substrate and the heat sink are fixed and attached with each other.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
       [0001]    This application is a continuation of International Application No. PCT/KR2012/006246 filed on Aug. 6, 2012. The application is incorporated herein by reference. 
     
    
     TECHNICAL FIELD 
       [0002]    The present invention relates to a heat-dissipating apparatus, and more particularly, to an apparatus of dissipating heat through a heat sink, which can be used in various electrical and electronic apparatuses with a heat sink for dissipating heat. 
       BACKGROUND ART 
       [0003]    In general, some kinds of electrical or electronic devices include heating members that generate a large amount of heat, and need a heat-dissipating structure for efficiently dissipating heat generated from such heating members. For example, a high-power, high-output amplifier, a high-speed, high-functional Central Processing Unit (CPU), a Digital Signal Processor (DSP), and a Field Programmable Gate Array (FPGA), generate a relatively large amount of heat. The generated heat may degrade the performance of the corresponding member or apparatus, or become a main factor of causing a malfunction or part damage. 
       SUMMARY 
       [0004]    In order to dissipate heat generated from a heating member, an apparatus requiring heat dissipation generally installs a heat sink with a plurality of heat-dissipating fins therein. Generally, the heat-dissipating efficiency of the heat sink increases in proportion to the number of the fins and the entire area of the heat sink. However, due to requirements for miniaturization and weight lightening of an apparatus in which the heat sink is installed, the design of the heat sink is limited. Particularly, miniaturization and weight lightening are very important in a mobile communication base station, a repeater, etc., which are installed at a high place. 
         [0005]    Accordingly, technologies for improving heat-dissipating efficiency while meeting requirements for miniaturization and weight lightening are developed in various ways. 
         [0006]    An aspect of the present invention provides an apparatus for dissipating heat through a heat sink, which is capable of achieving miniaturization and weight lightening while improving heat-dissipating efficiency. 
         [0007]    Another aspect of the present disclosure provides an apparatus for dissipating heat through a heat sink, which is capable of inducing efficient heat-dissipating for each heating device. 
         [0008]    In accordance with an aspect of exemplary embodiments of the present disclosure, there is provided an apparatus for dissipating heat through a heat sink, including: a heat transfer member having one end with a contact surface contacting a heating device mounted on a substrate and the other end with a contact surface contacting the heat sink, and configured to transfer heat generated from the heating device to the heat sink; an elastic member configured to provide an elastic force for pushing the heat transfer member toward the heating device; a guide member arranged in the heat sink to form a contact surface contacting the heat transfer member, and configured to mechanically guide the heat transfer member to slide toward the heating device; and a spacing member interposed between the substrate and the heat sink to maintain a predetermined spacing between the substrate and the heat sink when the heat sink is fixedly attached on the substrate. 
         [0009]    As described above, the apparatus of dissipating heat through the heat sink, according to the present disclosure, can achieve miniaturization and weight lightening while improving heat-dissipating efficiency, and induce efficient heat-dissipating for each heating device. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0010]      FIG. 1  is an exploded perspective view of an apparatus of dissipating heat through a heat sink, according to a first embodiment of the present disclosure; 
           [0011]      FIG. 2  is a cross-sectional view cut along a line A-A′ of  FIG. 1 ; 
           [0012]      FIG. 3  is an assembly view of  FIG. 2 ; 
           [0013]      FIG. 4  is a structure view of an apparatus of dissipating heat through a heat sink, according to a second embodiment of the present disclosure; 
           [0014]      FIG. 5  is a structure view of an apparatus of dissipating heat through a heat sink, according to a third embodiment of the present disclosure; and 
           [0015]      FIG. 6  is a structure view of an apparatus of dissipating heat through a heat sink, according to a fourth embodiment of the present disclosure. 
       
    
    
     DETAILED DESCRIPTION 
       [0016]    Now, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. Like numbers refer to like elements throughout the accompanying drawings. Also, in the following description, specific configurations of a heat sink, heat transfer members, elastic members, guide members, etc., are provided to help the understanding of the present disclosure, and accordingly, the specific configurations can be modified or changed within the scope of the present disclosure. 
         [0017]      FIG. 1  is an exploded perspective view of an apparatus of dissipating heat through a heat sink, according to a first embodiment of the present disclosure,  FIG. 2  is a cross-sectional view cut along a line A-A′ of  FIG. 1 , and  FIG. 3  is an assembly view of  FIG. 2 . Referring to  FIGS. 1 ,  2 , and  3 , the heat-dissipating apparatus according to the first embodiment of the present disclosure may include a plurality of heat transfer members  30 ,  32 , and  34 . The heat transfer members  30 ,  32 , and  34  may be respectively installed to correspond to a plurality of heating devices  60 ,  62 , and  64  of various shapes mounted on a substrate  20 , when a heat sink  10  is fixedly attached on the substrate  20 , such that one ends of the heat transfer members  30 ,  32 , and  34  have contact surfaces contacting the corresponding heating devices  60 ,  62 , and  64 , and the other ends of the heat transfer members  30 ,  32 , and  34  have contact surfaces contacting the heat sink  10  to thereby transfer heat generated from the heating devices  60 ,  62 , and  64  to the heat sink  10 . 
         [0018]    Also, the heat-dissipating apparatus may include a plurality of elastic members  40 ,  42 , and  44  that are installed to correspond to the respective heat transfer members  30 ,  32 , and  34  and that provide elastic forces for pushing the heat transfer members  30 ,  32 , and  34  toward the corresponding heating devices  60 ,  62 , and  64 . Each of the elastic members  40 ,  42 , and  44  may be implemented with a coil string structure, however, may be implemented with a flat spring or an elastic body made of a rubber material. 
         [0019]    Also, the heat sink  10  may include a plurality of guide members  16  (see  FIGS. 2 and 3 ) that are formed to correspond to the respective heat transfer members  30 ,  32 , and  34 , that have contact surfaces contacting the corresponding heat transfer members  30 ,  32 , and  34 , and that mechanically guide the corresponding heat transfer members  30 ,  32 , and  34  to slide toward the corresponding heating devices  60 ,  62 , and  64 . 
         [0020]    Each of the heat transfer members  30 ,  32 , and  34  may be in the shape of a cylindrical tube with a groove into which the corresponding elastic member  40 ,  42 , or  44  is inserted. Also, each of the guide members  16  may have a round groove structure whose diameter matches the diameter of the corresponding heat transfer member  30 ,  32 , or  34 , such that the corresponding heat transfer member  30 ,  32 , or  34  (with the elastic member  40 ,  42 , or  44 ) can be inserted into the guide member  16 , the side surface of the corresponding heat transfer member  30 ,  32 , or  34  in the shape of the cylindrical tube contacting the guide member  16 . 
         [0021]    However, the heat transfer members  30 ,  32 , and  34  may have any other shapes than the cylinder shape, and accordingly, the guide members  16  may also have various shapes. Also, the heat transfer members  30 ,  32 , and  34  may have sizes matching the sizes of the corresponding heating devices  60 ,  62 , and  64 , and may have different shapes in correspondence to the shapes of the heating devices  60 ,  62 , and  64 . 
         [0022]    Meanwhile, the heat sink  10  may be fixedly attached on the substrate  20  through screw coupling by a plurality of screws  52 . In order to maintain a predetermined spacing between the heat sink  10  and the substrate  20  when the heat sink  10  is coupled with the substrate  20 , a plurality of spacing members  50  may be interposed between the heat sink  10  and the substrate  20 . The spacing members  50  may include holes that the screws  52  can penetrate. The screws  52  may be coupled with screw holes  24  formed at the corresponding locations in the heat sink  10  through holes formed in the substrate  20  and the holes formed in the spacing members  50 , thereby fixedly attaching the heat sink  10  on the substrate  20 . 
         [0023]    As such, if the substrate  20  and the heat sink  10  are fixedly attached with each other with an appropriate spacing by the spacing members  50 , one end of the heat transfer member  30  may contact the heating device  60 , and the other end of the heat transfer member  30  may be pushed into the guide member  16 . In this state, the heat transfer member  30  may maintain a contact to the heating device  60  by the elastic member  40 . 
         [0024]    The lengths of the heat transfer member  30  and the guide member  16  may be appropriately set so as to provide space into which the heat transfer member  30  can be pushed to some extent in the guide member  14  even after the heat sink  10  is fixedly attached on the substrate  20 . If the space is not provided, significant pressure is applied to the heating device  60  through the heat transfer member  30  due to component tolerances or manufacturing tolerances, resulting in a damage of the heating device  60 . 
         [0025]    Likewise, an elastic force of the elastic member  40  may also be appropriately set so as to apply little pressure to the heating device  60  as possible while maintaining a contact of the heat transfer member  30  to the heating device  60  in a use environment. 
         [0026]    Also, if a plurality of heating devices having different heights are mounted on the substrate, the lengths of the heat transfer members  30 ,  32 , and  34  and the guide members  16  and the elastic forces of the elastic members  40 ,  42 , and  44  may be set to different values to correspond to the respective heating devices. 
         [0027]    According to the configuration as described above, heat generated from the plurality of heating devices  60 ,  62 , and  64  may be rapidly transferred to the heat sink  14  through the plurality of heat transfer members  30 ,  32 , and  34 , thereby significantly increasing heat-dissipating efficiency. 
         [0028]    In the structure described above, appropriately applying thermal paste, such as thermal grease or thermal compound, on the contact surfaces of the heat transfer members  30 ,  32 , and  34  to the heating devices  60 ,  62 , and  64  and on the contact surfaces of the heat transfer members  30 ,  32 , and  34  to the guide members may effectively increase thermal conductivity. 
         [0029]      FIG. 4  is a structure view of an apparatus of dissipating heat through a heat sink, according to a second embodiment of the present disclosure. Referring to  FIG. 4 , a structure of the heat dissipating apparatus according to the second embodiment of the present disclosure is similar to the structure according to the first embodiment as shown in  FIGS. 1 ,  2 , and  3 , except for the configuration of a guide member  18  formed in the heat sink  10 . 
         [0030]    That is, in the heat dissipating apparatus according to the second embodiment of the present disclosure, the guide member  18  may be in the shape of a cylindrical tube having a diameter that matches the diameter of the corresponding heat transfer member  30  in the shape of a cylindrical tube such that the heat transfer member  30  can be inserted into the guide member  18 . The guide member  18  may protrude from the inner surface of the heat sink  10 . 
         [0031]    Also, a plurality of spacing members  19  that are interposed between the substrate  20  and the heat sink  10  in order to maintain a predetermined spacing between the substrate  20  and the heat sink  10  when the heat sink  20  is coupled with the substrate  10  may be integrated into the heat sink  10 . A plurality of screws holes  14 ′ into which a plurality of screws  52 ′ are screwed may be formed in the integrated-type spacing members  51 . The plurality of screws  52 ′ may be screwed into the screw holes  14 ′ formed in the integrated-type spacing members  51  through holes formed in the substrate  20 , thereby fixedly attaching the heat sink  10  on the substrate  20 . 
         [0032]    Likewise, in the second embodiment shown in  FIG. 4 , the lengths of the heat transfer member  30  and the guide member  18  may be appropriately set so as to provide space into which the heat transfer member  30  can be pushed to some extent in the guide member  18  even after the heat sink  10  is fixedly attached on the substrate  20 . Accordingly, it is possible to prevent excessive pressure from being applied to the heating device  60 . 
         [0033]      FIG. 5  is a structure view of an apparatus of dissipating heat through a heat sink, according to a third embodiment of the present disclosure. Referring to  FIG. 5 , a structure of the heat dissipating apparatus according to the third embodiment of the present disclosure is similar to the structure according to the first embodiment as shown in  FIGS. 1 ,  2 , and  3 , except for the configuration of a guide member  18 ′ formed in the heat sink  10 . 
         [0034]    In the heat dissipating apparatus according to the third embodiment of the present disclosure, the guide member  18 ′ may be in the shape of a cylindrical tube that protrudes from the inner surface of the heat sink  10 , like the second embodiment shown in  FIG. 4 . However, unlike the second embodiment shown in  FIG. 4 , the guide member  18 ′ may have a diameter matching the diameter of a heat transfer member  30 ′ in the shape of a cylindrical tube such that the guide member  18 ′ can be inserted into the groove of the heat transfer member  30 ′. 
         [0035]      FIG. 6  is a structure view of an apparatus of dissipating heat through a heat sink, according to a fourth embodiment of the present disclosure. Referring to  FIG. 6 , a structure of the heat-dissipating apparatus according to the fourth embodiment of the present disclosure is similar to the structure according to the first embodiment as shown in  FIGS. 1 ,  2 , and  3 , except for the configurations of a heat transfer member  31  and an elastic member  70 . 
         [0036]    That is, in the heat-dissipating apparatus according to the fourth embodiment of the present disclosure, the heat transfer member  31  may be in the shape of a cylindrical tube without a groove, and the elastic member  70  may have a flat spring structure instead of a coil spring structure. 
         [0037]    Configurations of the heat dissipating apparatuses according to the embodiments of the present disclosure have been described above, however, various modifications can be made in the embodiments of the present disclosure without departing from the scope of the present disclosure. For example, in the embodiments of the present disclosure as described above, the guide members have groove structures or protruded cylinder structures. However, a part of the guide members may have groove structures, and the other part of the guide members may have protruded cylinder structures. Also, some of the structures disclosed in any one(s) of the above-described embodiments can be partially applied to the other embodiments. For example, the integrated-type spacing members  51  disclosed in the second embodiment of  FIG. 4 , the heat transfer member  31  in the shape of the cylindrical tube and the flat spring  70  disclosed in the fourth embodiment of  FIG. 6 , etc. can be applied to the other embodiments. 
         [0038]    It will be apparent to those skilled in the art that various modifications and variations can be made in the present disclosure without departing from the spirit or scope of the disclosures. Thus, it is intended that the present disclosure covers the modifications and variations of this disclosure provided they come within the scope of the appended claims and their equivalents.