Heat sink of a large area

Abstract

The present invention relates to a heat sink of a large area, in which a heat-dissipating body is further provided in its limited space. The method for manufacturing a fin includes the steps of providing a fin, cutting the fin to form a foldable piece thereon, folding back the foldable piece to be overlapped on the fin and form an accommodating hole, and punching the folded piece and the fin to form two overlapped through-holes. The fin, the heat-dissipating body and heat pipes are assembled together to obtain the heat sink. Since the fins and the heat-dissipating body dissipate the heat of a heat-generating element simultaneously, the heat-dissipating efficiency of the heat sink can be improved.

What is claimed is: 
     
         1 . A heat sink of a large area, comprising;
 a heat pipe; and   a plurality of fins parallel to each other and arranged at intervals, the heat pipe penetrating the fins, the fin being provided with a foldable piece, the foldable piece being folded back to be overlapped on the fin, thereby forming an accommodating hole on the fin, the folded piece and the fin being provided with two overlapped through-holes, the heat pipe penetrating the two through-holes of the fin.   
     
     
         2 . The heat sink of a large area according to  claim 1 , wherein a hollow airflow channel is formed between the folded piece and the fin. 
     
     
         3 . The heat sink of a large area according to  claim 1 , wherein the peripheries of the two through-holes are provided with two overlapped flanges. 
     
     
         4 . The heat sink of a large area according to  claim 1 , further comprising a heat-conducting base, wherein the heat pipe is inserted into the heat-conducting base. 
     
     
         5 . The heat sink of a large area according to  claim 1 , wherein a hollow airflow channel is formed between the folded piece and the fin. 
     
     
         6 . The heat sink of a large area according to  claim 1 , wherein peripheries of the two through-holes are provided with two overlapped flanges.