Heat sink

Abstract

A heat sink includes a base plate thermally connectable to a heat generating element and having a flat plate shape, a first heat radiating fin thermally connected to the base plate, and a second heat radiating fin disposed adjacently to a side end portion of the first heat radiating fin and thermally connected to the base plate. A surface of the first heat radiating fin is not parallel to a surface of the second heat radiating fin.

What is claimed is: 
     
         1 . A heat sink comprising:
 a base plate thermally connectable to a heat generating element and having a flat plate shape;   a first heat radiating fin thermally connected to the base plate; and   a second heat radiating fin disposed adjacently to a side end portion of the first heat radiating fin and thermally connected to the base plate,   wherein a surface of the first heat radiating fin is not parallel to a surface of the second heat radiating fin.   
     
     
         2 . The heat sink according to  claim 1 , wherein the first heat radiating fin is thermally connected to the base plate via a heat conductive member. 
     
     
         3 . The heat sink according to  claim 1 , further comprising a third heat radiating fin disposed adjacently to a side end portion of the second heat radiating fin and thermally connected to the base plate, wherein a surface of the third heat radiating fin is not parallel to the surface of the second heat radiating fin. 
     
     
         4 . The heat sink according to  claim 3 , wherein the third heat radiating fin is thermally connected to the base plate via a heat conductive member. 
     
     
         5 . The heat sink according to  claim 2 , wherein the heat conductive member is a heat pipe. 
     
     
         6 . The heat sink according to  claim 4 , wherein the heat conductive member is a heat pipe. 
     
     
         7 . The heat sink according to  claim 5 , wherein the heat pipe has one of a U-shape as viewed in a side view, an L-shape as viewed in a side view and a sideways-open U-shape as viewed in a side view. 
     
     
         8 . The heat sink according to  claim 6 , wherein the heat pipe has one of a U-shape as viewed in a side view, an L-shape as viewed in a side view and a sideways-open U-shape as viewed in a side view. 
     
     
         9 . The heat sink according to  claim 1 , wherein an end portion of the second heat radiating fin is in direct contact with the base plate so that the second heat radiating fin is thermally connected to the base plate. 
     
     
         10 . The heat sink according to  claim 9 , wherein an end portion of the second heat radiating fin on a side opposite to the end portion of the second heat radiating fin in direct contact with the base plate is thermally connected to the base plate via a heat pipe.