Heat sink

Abstract

A heat sink configured for heat dissipation of a heat-dissipating element on a circuit boards includes a base, a linear fastener and a heat-dissipating fin set. A surface of the base is provided with a groove. The linear fastener includes a fixing section and an engaging section bent to extend from the fixing section. The fixing section is disposed in the groove. The engaging section protrudes out of the base to be fixed onto the circuit board. The heat-dissipating fin set is constituted of a plurality of stamped fins engaged with each other. The heat-dissipating fin set is combined on the base to press the fixing section, thereby clamping the fixing section between the heat-dissipating fin set and the base. The linear fastener makes the heat-dissipating fin set to be combined on the circuit board, thereby increasing the heat-dissipating efficiency of the heat sink.

What is claimed is: 
     
         1 . A heat sink, configured for heat dissipation of a heat-dissipating element on a circuit board and including:
 a base having at least one groove on its one surface;   a linear fastener comprising a fixing section and an engaging section bent to extend from the fixing section, the fixing section being disposed in the groove, the engaging section protruding out of the base to be fixed on the circuit board; and   a heat-dissipating fin set having a plurality of stamped fins engaged with each other, the heat-dissipating fin set being combined on the base to press the fixing section, thereby clamping the fixing section between the heat-dissipating fin set and the base.   
     
     
         2 . The heat sink according to  claim 1 , wherein the base is provided with a plurality of grooves, and the grooves are arranged on the surface of the base longitudinally and transversely. 
     
     
         3 . The heat sink according to  claim 2 , wherein the linear fastener has two engaging sections bent to extend from two ends of the fixing section in opposite directions respectively. 
     
     
         4 . The heat sink according to  claim 3 , wherein the fixing section comprises a connecting portion and two abutting portions extending from the connecting portions in opposite directions respectively 
     
     
         5 . The heat sink according to  claim 4 , wherein each of the stamped fins has an abutting piece adhered to the base and a plurality of engaging pieces engaged with each other, and the abutting pieces of adjacent two stamped fins abut against each other to form a heat-dissipating channel there between. 
     
     
         6 . The heat sink according to  claim 5 , wherein the connecting portion is located between the engaging portions, and the two abutting portions extend outside the engaging portions respectively. 
     
     
         7 . The heat sink according to  claim 3 , wherein each of the engaging sections comprises a locking arm and a hook formed on a distal end of the locking arm, the locking arm extends obliquely and upwards from the distal end of the fixing section, and the hook is bent toward an inner side of the linear fastener. 
     
     
         8 . The heat sink according to  claim 1 , wherein the circuit board has at least one locking ring, and the engaging section is hooked into the locking ring of the circuit board. 
     
     
         9 . A heat sink, configured for heat dissipation of a heat-dissipating element on a circuit board and including:
 a base having a plurality of grooves on its one surface;   a pair of linear fasteners each comprising a fixing section and an engaging section bent to extend from the fixing section, the fixing sections of the pair of linear fastener being disposed in the grooves symmetrically, each of the engaging sections protruding out of the base; and   a heat-dissipating fin set having a plurality of stamped fins engaged with each other, the heat-dissipating fin set being combined on the base to press the fixing sections, thereby clamping the fixing sections between the heat-dissipating fin set and the base.   
     
     
         10 . The heat sink according to  claim 9 , wherein the fixing section of the linear fastener comprises a U-shaped connecting portion and two abutting portions extending vertically from two ends of the U-shaped connecting portion in opposite directions respectively. 
     
     
         11 . The heat sink according to  claim 10 , wherein the two engaging sections of each of the linear fasteners are bent to extend toward two ends of the fixing section in the same direction respectively. 
     
     
         12 . The heat sink according to  claim 11 , wherein each of the engaging sections comprises a locking arm and a hook formed on a distal end of the locking arm, the locking arm extends obliquely and upwards from the distal end of the fixing section, and the hook is bent toward an inner side of the linear fastener. 
     
     
         13 . The heat sink according to  claim 11 , wherein opposite sides of the circuit board are provided with a plurality of locking rings, and the engaging sections of the pair of linear fastener are hooked into the locking rings respectively.