Heat sink

Abstract

At least one heat pipe is fixed to each of fin plates, a rectangular fin plate assembly is constituted of the fin plate, the fin plate and the fin plate of the plurality of respective radiation fin parts as the plurality of radiation fin parts are seen from the direction in which the heat pipes extend, the plurality of heat pipes include a first heat pipe group and a second heat pipe group, the first heat pipe group is positioned at the center in the longitudinal direction of the fin plate assembly, the second heat pipe group is positioned on both sides of the first heat pipe group in the longitudinal direction of the fin plate assembly, and the fin plate thermally connected to the first heat pipe group includes expanding parts.

1 . A heat sink comprising: a plurality of heat pipes; and radiation fin parts respectively corresponding to the plurality of heat pipes, the radiation fin parts being fixed to respective end parts of the plurality of heat pipes hi a longitudinal direction, each of the plurality of radiation fin parts being composed of a plurality of fin plates, a gap being formed between adjacent fin plates, wherein
 the fin plate has a fixing part for thermal connection to the heat pipe, and at least one heat pipe is fixed to each fin plate,   a fin plate assembly is constituted of the fin plates of the plurality of respective radiation fin parts as the plurality of radiation fin parts are seen from a direction in which the heat pipe extends,   the plurality of heat pipes are composed of a first heat pipe group and a second heat pipe group, the first heat pipe group is positioned at a center in a longitudinal direction of the fin plate assembly, and the second heat pipe group is positioned on both sides of the first heat pipe group in the longitudinal direction of the fin plate assembly, and   the fin plate thermally connected to the first heat pipe group includes an expanding part.   
     
     
         2 . The heat sink according to  claim 1 , wherein at least one side of the expanding part is parallel to at least one side of each fin plate assembly. 
     
     
         3 . The heat sink according to  claim 1 , wherein at least one side of the expanding part is oblique to at least one side of each fin plate assembly. 
     
     
         4 . The heat sink according to  claim 1 , wherein a part of one side in the expanding part is folded. 
     
     
         5 . The heat sink according to  claim 1 , wherein all the plurality of heat pipes are constituted of straight line shapes. 
     
     
         6 . The heat sink according to  claim 2 , wherein a part of one side in the expanding part is folded. 
     
     
         7 . The heat sink according to  claim 3 , wherein a part of one side in the expanding part is folded. 
     
     
         8 . The heat sink according to  claim 2 , wherein all the plurality of heat pipes are constituted of straight line shapes. 
     
     
         9 . The heat sink according to  claim 3 , wherein all the plurality of heat pipes are constituted of straight line shapes. 
     
     
         10 . The heat sink according to  claim 4 , wherein all the plurality of heat pipes are constituted of straight line shapes. 
     
     
         11 . The heat sink according to  claim 6 , wherein all the plurality of heat pipes are constituted of straight line shapes. 
     
     
         12 . The heat sink according to  claim 7 , wherein all the plurality of heat pipes are constituted of straight line shapes.