Structure of heat sink

Abstract

An improved structure of a heat sink is disclosed. The heat sink is composed of a ring body, fins and a bottom plate. The fins are radially arranged on the ring body. The bottom plate is fixed in the ring body for being placed a heat source. The heat sink can effectively dissipate the heat from the heat source.

1 . A heat sink comprising:
 a ring body;   a plurality of fins radially disposed on an outer surface of the ring body; and   a bottom plate fixed in the ring body for being placed a heat source.   
   
   
       2 . The heat sink of  claim 1 , wherein the ring body is provided with a plurality of thin grooves and taper slot, both of which are alternatively arranged. 
   
   
       3 . The heat sink of  claim 2 , wherein the thin grooves separately grip the fins by using a punch to extrude the taper slot. 
   
   
       4 . The heat sink of  claim 1 , wherein the ring body is one of circle, semicircle, oval, rectangle or cone. 
   
   
       5 . The heat sink of  claim 1 , wherein the ring body is of an irregular shape. 
   
   
       6 . The heat sink of  claim 1 , wherein a diameter of the bottom plate is equal to or slightly smaller than an inner diameter of the ring body. 
   
   
       7 . The heat sink of  claim 6 , wherein the bottom plate is connected to the ring body by soldering, welding or infusing thermal grease. 
   
   
       8 . The heat sink of  claim 6 , wherein the bottom plate is connected to the ring body by pressing the bottom plate to deform. 
   
   
       9 . The heat sink of  claim 1 , wherein a diameter of the bottom plate is slightly larger than an inner diameter of the ring body. 
   
   
       10 . The heat sink of  claim 9 , wherein the bottom plate is connected to the ring body by using a molding machine to press the bottom plate. 
   
   
       11 . The heat sink of  claim 1 , wherein the bottom plate is made of copper, aluminum or iron. 
   
   
       12 . The heat sink of  claim 1 , wherein the bottom plate is composed of two elements with different materials. 
   
   
       13 . The heat sink of  claim 1 , wherein the ring body and bottom plate are made of different materials. 
   
   
       14 . The heat sink of  claim 1 , wherein a junction between the bottom plate and the ring body is provided with at least one gap for air flow. 
   
   
       15 . The heat sink of  claim 1 , wherein the bottom plate is a heat spreader having a working fluid. 
   
   
       16 . The heat sink of  claim 1 , wherein both the ring body and the fins are integratedly formed into a single module.