Heat dissipation device

Abstract

A heat dissipation device includes a first heat sink and a second heat sink connected to each other. Each of the first and second heat sinks includes a base and a plurality of fins extending from the base. The base of the first heat sink forms a rib on a lateral face thereof, and the base of the second heat sink defines a groove in a lateral face thereof. The rib is received in the groove to connect the first heat sink with the second heat sink.

What is claimed is: 
     
         1 . A heat dissipation device comprising:
 a first heat sink comprising a base and a plurality of fins extending from the base, the base of the first heat sink forming a rib on a face thereof; and   a second heat sink comprising a base and a plurality of fins extending from the base, the base of the second heat sink defining a groove in a face thereof facing the face of the base of the first heat sink, the rib being received in the groove to connect the first heat sink to the second heat sink.   
     
     
         2 . The heat dissipation device of  claim 1 , wherein the base of the first heat sink has a top face, a bottom face opposite to the top face and a plurality of lateral faces between the top face and the bottom face, the rib being formed on one of the lateral faces of the base of the first heat sink. 
     
     
         3 . The heat dissipation device of  claim 2 , wherein the base of the second heat sink has a top face, a bottom face and a plurality of lateral faces between the top face and the bottom face, the groove being defined in one of the lateral faces of the base of the second heat sink. 
     
     
         4 . The heat dissipation device of  claim 3 , wherein the rib has a width gradually increasing in a direction away from the one of the lateral faces of the base of the first heat sink. 
     
     
         5 . The heat dissipation device of  claim 3 , wherein the rib has a width gradually increasing in a direction away from the one of the lateral faces of the base of the second heat sink. 
     
     
         6 . The heat dissipation device of  claim 2 , wherein the rib has a narrow end connected to the one of the lateral faces of the base of the first heat sink and a wide end away from the base of the first heat sink. 
     
     
         7 . The heat dissipation device of  claim 6 , wherein the groove has an opening facing the one of the lateral faces of the base of the first heat sink. 
     
     
         8 . The heat dissipation device of  claim 7 , wherein a width of the opening of the groove is larger than a width of the narrow end of the rib and smaller than a width of the wide end of the rib. 
     
     
         9 . The heat dissipation device of  claim 1 , wherein each of the first heat sink and the second heat sink is made by aluminum-extrusion. 
     
     
         10 . The heat dissipation device of  claim 3 , wherein the fins of the first heat sink are formed on the top face of the base of the first heat sink, and the fins of the second heat sink are formed on the top face of the base of the second heat sink. 
     
     
         11 . A heat dissipation device comprising:
 a first heat sink comprising a base and a plurality of fins extending from the base, the base of the first heat sink forming a rib on a face thereof, the rib has a narrow end connected to the face of the base of the first heat sink and a wide end away from the face of the base of the first heat sink; and   a second heat sink comprising a base and a plurality of fins extending from the base; the base of the second heat sink defining a groove in a face thereof to receive the rib, the groove having an opening facing the first heat sink, the opening having a width less than a width of the wide end of the rib and larger than a width of the narrow end of the rib.   
     
     
         12 . The heat dissipation device of  claim 11 , wherein each of the base of the first heat sink and the second heat sink comprises a top face, a bottom face opposite to the top face and a plurality of lateral faces between the top face and the bottom face, the rib being formed on one of the lateral faces of the base of the first heat sink, and the groove being defined in one of the lateral faces of the base of the second heat sink. 
     
     
         13 . The heat dissipation device of  claim 11 , wherein each of the first heat sink and the second heat sink is made by aluminum-extrusion. 
     
     
         14 . The heat dissipation device of  claim 11 , wherein the rib has a width gradually increasing in a direction away from the face of the base of the first heat sink where the rib is formed. 
     
     
         15 . The heat dissipation device of  claim 11 , wherein the groove has a width gradually increasing in a direction away from the face of the base of the second heat sink where the groove is defined. 
     
     
         16 . The heat dissipation device of  claim 12 , wherein the fins of the first heat sink are formed on the top face of the base of the first heat sink, and the fins of the second heat sink are formed on the top face of the base of the second heat sink. 
     
     
         17 . The heat dissipation device of  claim 12 , wherein the bottom face of the first heat sink is coplanar with the bottom face of the second heat sink.