Heat dissipation assembly

Abstract

A heat sink assembly includes a base, a heat pipe, a first heat sink, and a second heat sink. The second heat sink is installed between the base and the first heat sink. The heat pipe includes a positioning portion sandwiched between the second heat sink and the base, and two heat-conductive portions extending up from two opposite ends of the positioning portion and inserted into the first heat sink.

What is claimed is: 
     
         1 . A heat dissipation assembly, comprising:
 a base;   a first heat sink installed on the base;   a second heat sink installed between the base and the first heat sink; and   a heat pipe comprising a positioning portion sandwiched between the second heat sink and the base, and two heat-conductive portions extending up from two opposite ends of the positioning portion and inserted into the first heat sink;   wherein the base comprises a rectangular bracket, two spaced baffling pieces extend up from each side of the bracket, the baffling pieces at the each side of the bracket cooperatively bound a cutout, the heat pipe further comprises two connecting portions respectively connected between the heat-conductive portions and the two opposite ends of the positioning portion, each baffling piece faces the corresponding connecting portion, and the second heat sink is located between the cutouts of the bracket.   
     
     
         2 . The heat dissipation assembly of  claim 1 , wherein the first heat sink is supported on the bracket, and a bottom of the first heat sink is engaged with the baffling pieces. 
     
     
         3 . The heat dissipation assembly of  claim 1 , wherein the base further comprises a connecting member, the bracket defines an opening, the connecting member comprises a supporting plate received in the opening and two flanges extending out from two opposite ends of the supporting plate to be mounted to the bracket, the baffling pieces are respectively located at two opposite sides of the opening, and the second heat sink is mounted on the support plate. 
     
     
         4 . The heat dissipation assembly of  claim 3 , wherein a top of the supporting plate defines a first receiving slot for receiving a bottom of the positioning portion of the heat pipe. 
     
     
         5 . The heat dissipation assembly of  claim 4 , wherein the second heat sink comprises a bottom plate and a plurality of fins extending up from the bottom plate, the bottom plate defines a second receiving slot for receiving a top of the positioning portion of the heat pipe. 
     
     
         6 . The heat dissipation assembly of  claim 1 , wherein the first heat sink comprises a plurality of fins parallel to and spaced from one another, each fin defines two inserting holes, the heat-conductive portions are inserted into the inserting holes of each fin.