Fins-type heat sink and method for assembling the same

Abstract

In a heat sink and a method for assembling the same, the heat sink includes a base, a heat pipe, fins, a presser and caps. The presser is provided with through-holes. The periphery of the through-hole is provided with an annular neck, so that the distal end of the heat pipe can penetrate the through-hole. The periphery of each annular neck is provided with notches on the presser. Each cap covers on the annular neck, and it extends downwards to form protruding flaps. The flap penetrates the notch and is folded outwards to abut the bottom surface of the presser. According to the assembling method, via the presser and the caps, the fins can be assembled with the heat pipe tightly.

1 . A fins-type heat sink, comprising:
 a base ( 10 );   a heat pipe ( 11 ) thermally connected on the base ( 10 );   a plurality of fins ( 12 ) each provided with penetrating holes ( 120 ), an outer periphery of each penetrating hole ( 120 ) being formed with an annular wall ( 121 ), the plurality of fins ( 12 ) being overlapped on the heat pipe ( 11 ) at intervals;   a presser ( 13 ) provided with through-holes ( 130 ) for cooperating with the penetrating holes ( 120 ) of each fin ( 12 ) respectively, a periphery of each through-hole ( 130 ) being provided with an annular neck ( 131 ) for allowing a distal end of the heat pipe ( 11 ) to penetrate, an outer periphery of each annular neck ( 131 ) being provided with notches ( 132 ) on the presser ( 13 ); and   a plurality of caps ( 14 ) covering the annular necks ( 131 ) of the presser ( 13 ), each cap ( 14 ) extending downwards to form protruding flaps ( 140 ), the flap ( 140 ) passing through the notches ( 132 ) to be folded outwards so as to abut a bottom surface of the presser ( 13 ).   
     
     
         2 . The fins-type heat sin according to  claim 1 , wherein the distal end of the heat pipe ( 11 ) abuts inside the corresponding cap ( 14 ). 
     
     
         3 . The fins-type heat sin according to  claim 1 , wherein the presser ( 13 ) is made of a heat-conducting material. 
     
     
         4 . The fins-type heat sin according to  claim 1 , wherein a thickness of the presser ( 13 ) is larger than that of each fin ( 12 ) 
     
     
         5 . A method for assembling a fins-type heat sink, comprising the steps of:
 (a) providing a heat sink ( 1 ), a presser ( 13 ) and a plurality of caps ( 14 ), the heat sink ( 1 ) having a heat pipe ( 11 ) and a plurality of fins ( 12 ) disposed on the heat pipe ( 11 ), the presser ( 13 ) being provided with through-holes ( 130 ) allowing the distal ends of the heat pipe ( 11 ) to be inserted therein, a periphery of each through-hole ( 130 ) being provided with an annular neck ( 131 ), the presser ( 13 ) being provided with notches ( 132 ) that are arranged circumferentially outside the annular neck ( 131 );   (b) covering the caps ( 14 ) on the annular necks ( 131 ) of the presser ( 13 ) respectively, rach caps ( 14 ) extending downwards to form protruding flaps ( 140 ) penetrating the notches ( 132 );   (c) disposing a plate-like die ( 2 ) on the topmost fin ( 12 ) of the heat sink ( 1 );   (d) inserting a distal end of the heat pipe ( 11 ) through the through-hole ( 130 ) of the presser ( 13 ) to abut inside the cap ( 14 ), while folding the flaps ( 140 ) outwards via the plate-like die ( 2 ).   
     
     
         6 . The method according to  claim 5 , wherein in the step (b), each of the flaps ( 140 ) is folded outwards after penetrating the notch ( 132 ). 
     
     
         7 . The method according to  claim 5 , wherein in the step (c), a thickness of the plate-like die ( 2 ) is substantially identical to the pitch between the respective fins ( 12 ).