Heat dissipation device having fan holders

Abstract

A heat dissipation device includes a heat sink, a fan and two fan holders securing the fan on a top of the heat sink. Two locking parts are defined at two opposite lateral sides of the heat sink. Each fan holder includes an operating plate and a wire clip. The operating plate has first fastening parts formed at an upper edge of the operating plate and second fastening parts formed at a lower edge of the operating plate. The wire clip has a tensile part pivotally connected to the first fastening parts of the operating plate and two latching arms extending upwardly from two opposite ends of the tensile part. Upper ends of the latching arms of the wire clips are fastened to the fan. The second fastening parts of the operating plate engage with one of the two locking parts of the heat sink.

1 . A heat dissipation device comprising:
 a heat sink defining two locking parts at two opposite lateral sides thereof;   a fan placed on a top of the heat sink; and   two fan holders each comprising an operating plate having first fastening parts formed at an upper edge of the operating plate and second fastening parts formed at a lower edge of the operating plate, and a wire clip having a tensile part pivotally connected to the first fastening parts of the operating plate and two latching arms extending upwardly from two opposite ends of the tensile part;   wherein upper ends of the latching arms of the wire clips are fastened to the fan and the second fastening parts of the operating plates engage with the two locking parts of the heat sink to thus secure the fan onto the heat sink.   
     
     
         2 . The heat dissipation device as claimed in  claim 1 , wherein the first fastening parts of the operating plate of each fan holder are extended inwardly and downwardly from the upper edge of the operating plate and then curved back to embrace the tensile part of a corresponding wire clip therein. 
     
     
         3 . The heat dissipation device as claimed in  claim 2 , wherein an engaging slot is defined in each first fastening part and engagingly receives the tensile part therein. 
     
     
         4 . The heat dissipation device as claimed in  claim 1 , wherein each second fastening part extends toward the heat sink from the bottom edge of the operating plate and have an engaging tab which protrudes upwardly from a distal end thereof and catches a corresponding locking part of the heat sink. 
     
     
         5 . The heat dissipation device as claimed in  claim 4 , wherein each locking part includes a receiving groove which defined in a lateral side of the heat sink and engagingly receives the engaging tabs of the second fastening parts. 
     
     
         6 . The heat dissipation device as claimed in  claim 1 , wherein the operating plate comprises two connecting parts and an operating part having a width smaller than that of the two connecting parts and connected to two facing middle parts of the two connecting parts. 
     
     
         7 . The heat dissipation device as claimed in  claim 6 , wherein a pressing plate extends outwardly from an upper edge of the operating part of the operating plate, and wherein the first and second fastening parts are respectively formed at upper and lower edges of each connecting part and located at the same side of the operating plate opposite to the pressing plate. 
     
     
         8 . The heat dissipation device as claimed in  claim 1 , wherein each latching arm extends upwardly from an end of the tensile part and is curved back downwardly to form a hook at an upper end thereof, the hook being inserted into a fixing hole defined in a corner of the fan. 
     
     
         9 . The heat dissipation device as claimed in  claim 1 , wherein a restricting protrusion protrudes upwardly from a middle of the tensile part of each wire clip and located between the two first fastening parts of the operating plate. 
     
     
         10 . The heat dissipation device as claimed in  claim 1 , wherein at least two supporting parts extend outwardly from the two lateral sides of the heat sink and support the fan thereon, each supporting part defining a receiving groove in a bottom surface thereof, the receiving groove engagingly receiving the second fastening parts of the operating plate. 
     
     
         11 . The heat dissipation device as claimed in  claim 10 , wherein the heat sink comprises a base plate, a plurality of fins extending upwardly from the base plate and two side plates extending upwardly from two opposite lateral sides of the base plate, the at least two supporting parts extending outwardly from the two side plates, respectively. 
     
     
         12 . The heat dissipation device as claimed in  claim 11 , wherein each side plate is sidestep-shaped and has a first vertical part extending upwardly and perpendicularly from one of the opposite lateral sides of the base plate, a horizontal part extending outwardly and horizontally from a top edge of the first vertical part and a second vertical part extending upwardly and perpendicularly from an outer side of the horizontal part, wherein the supporting part extending outwardly and horizontally from a top edge of the second vertical part and having a restricting part extending upwardly from an outer side of the supporting part and abutting against a lateral side of the fan. 
     
     
         13 . A heat dissipation device comprising:
 a heat sink having two supporting parts extending outwardly from two opposite lateral sides thereof;   a fan placed on the two supporting parts of the heat sink; and   two fan holders each comprising an operating plate having first fastening parts formed at an upper edge of the operating plate and second fastening parts formed at a lower edge of the operating plate, and a wire clip having a tensile part pivotally connected to the first fastening parts of the operating plate and two latching arms extending upwardly from two opposite ends of the tensile part, each latching arm having a hook formed at distal end thereof;   wherein the hooks of the latching arms of the wire clips engages with the fan and the second fastening parts of the operating plates engage with the two supporting parts of the heat sink to thus secure the fan onto the heat sink.   
     
     
         14 . The heat dissipation device as claimed in  claim 13 , wherein the first fastening parts of the operating plate are extended inwardly and downward from the upper edge of the operating plate and then curved back to embrace the tensile part of a corresponding wire clip therein. 
     
     
         15 . The heat dissipation device as claimed in  claim 14 , wherein an engaging slot is defined in each first fastening part and engagingly receives the tensile part therein. 
     
     
         16 . The heat dissipation device as claimed in  claim 13 , wherein the second fastening parts extend toward the heat sink from the bottom edge of the operating plate and each have an engaging tab which protrudes upwardly from a distal end thereof and is engagingly received in a receiving groove formed in a bottom surface of a corresponding supporting part of the heat sink.