Heat dissipation device with fan holder

Abstract

A heat dissipation device adapted for dissipating heat generated by an electronic component mounted on a printed circuit board. The heat dissipation device includes a heat sink attached to the electronic component, a fan, and a fan holder. The fan includes a frame and a rotor received in the frame. The fan holder mounts the fan onto the heat sink and includes a base fixed on the heat sink, four clasps extending upward from four corners of a top surface of the base, and four elastic portions corresponding to the clasps and configured to resiliently urge the frame of the fan. The frame of the fan is arranged on the base of the fan holder and sandwiched between the clasps and the elastic portions.

1 . A heat dissipation device comprising:
 a heat sink comprising a plurality of fins;   a fan, the fan comprising a frame and a rotor received in the frame; and   a fan holder mounting the fan onto the heat sink, the fan holder comprising a base fixed on the heat sink, four clasps extending upwardly from four corners of a top surface of the base, and four elastic portions corresponding to the clasps and configured to resiliently urge the frame of the fan, wherein the frame of the fan is arranged on the base of the fan holder and sandwiched between the clasps and the elastic portions.   
     
     
         2 . The heat dissipation device of  claim 1 , wherein the frame of the fan comprises a bottom plate, and each of the clasps comprises a first portion extending upwardly from the top surface of the base, and a second portion extending from a top free end of the first portion toward to a center of the base for clasping the bottom plate of the fan. 
     
     
         3 . The heat dissipation device of  claim 2 , wherein the second portion of each of the clasps extends perpendicularly from the top free end of the first portion, and the clasp has an L-shaped configuration. 
     
     
         4 . The heat dissipation device of  claim 2 , wherein the second portion of each of the clasps extends inclinedly downward from the top free end of the first portion. 
     
     
         5 . The heat dissipation device of  claim 1 , wherein the elastic portions are arranged at a same side of the corresponding clasps. 
     
     
         6 . The heat dissipation device of  claim 1 , wherein each of the elastic portions comprises a first end connected to the base, and a free end adjacent to the corresponding clasp. 
     
     
         7 . The heat dissipation device of  claim 5 , wherein the free end of each elastic portion includes an arc protrusion, and the arc protrusion is resiliently locked with the frame of the fan at the top surface of the base. 
     
     
         8 . The heat dissipation device of  claim 1 , wherein the base, the clasps and the elastic portions of the fan holder are integrally formed as a single monolithic piece of metal. 
     
     
         9 . The heat dissipation device of  claim 1 , wherein the four clasps are radially symmetrical with respect to each other about a center of the fan holder. 
     
     
         10 . The heat dissipation device of  claim 1 , wherein a height of each of the clasps is greater than that of the corresponding elastic portion. 
     
     
         11 . The heat dissipation device of  claim 1 , wherein the fins of the heat sink are divided into four groups, with the fins of the four groups oriented in four different directions, and the fins of two neighboring groups oriented perpendicularly to each other. 
     
     
         12 . The heat dissipation device of  claim 1 , wherein the frame of the fan comprises a bottom plate, and the bottom plate is arranged on the base of the fan holder and sandwiched between the clasps and the elastic portions. 
     
     
         13 . A fan holder for mounting a fan onto a heat sink, the fan comprising a frame and a rotor received in the frame, the fan holder comprising:
 a base for supporting the frame of the fan thereon;   a plurality of clasps extending up from the base for clasping an upper side of the frame, and   a plurality of elastic portions extending up from the base and corresponding to the clasps, the elastic portions being adapted for resiliently abutting against a bottom side of the frame thereby exerting an upward force on the frame and clamping the frame in the clasps.   
     
     
         14 . The fan holder of  claim 13 , wherein each of the clasps comprises a first portion extending upwardly from the top surface of the base, and a second portion extending perpendicularly from a top free end of the first portion. 
     
     
         15 . The fan holder of  claim 13 , wherein each of the clasps comprises a first portion extending upwardly from the top surface of the base, and a second portion extending inclinedly downward from a top free end of the first portion. 
     
     
         16 . The fan holder of  claim 13 , wherein each of the elastic portions comprises a first end connected to the base and a free end adjacent to the corresponding clasp, and the free end of the elastic portion includes an arc protrusion. 
     
     
         17 . The fan holder of  claim 14 , wherein the plurality of clasps is four clasps arranged on four corners of the base, the clasp being radially symmetrical with respect to each other about a center of the fan holder, and the elastic potions are arranged at a same side of the corresponding clasps.