Heat dissipation device

Abstract

An exemplary heat dissipation device includes mounting feet and fasteners mounted on the mounting feet. Each fastener includes a shaft and two latching portions extending outwardly from an outer circumference of an end of the shaft. Each mounting foot defines a through hole allowing extension of the end of the shaft with two second portions. Each mounting foot defines two latching recesses in a surface thereof. Each of the latching recesses defines two blocking surfaces. When the end of the shaft with the latching portion extends through the through hole and beyond the surface of a corresponding mounting foot, the shaft is rotated with respect to the through hole so as to make the latching portion be received in the latching recesses. The blocking surfaces of the latching recesses stop the latching portions rotating with respect to the through hole to escape from the corresponding mounting foot.

1 . A heat dissipation device comprising:
 a heat conductive body comprising a plurality of mounting feet extending outwardly therefrom; and   a plurality of fasteners mounted on the mounting feet, each of the fasteners comprising a shaft, an elastic member encircling the shaft, and two latching portions extending outwardly from an outer circumference of an end of the shaft;   wherein each of the mounting feet defines a through hole comprising a central first portion allowing extension of the end of the shaft therethrough and two second portions allowing extension of the latching portions therethrough, each mounting foot defining two latching recesses in a bottom surface thereof, each of the latching recesses bounded by two blocking surfaces;   wherein when the end of the shaft with the latching portions of each fastener extends through the through hole and beyond the bottom surface of a corresponding mounting foot, and the shaft is then rotated with respect to the through hole so as to cause the latching portions to be received in the latching recesses and held therein by the elastic member, the blocking surfaces of the latching recesses stop the latching portions from rotating with respect to the through hole and disengaging from the mounting foot.   
     
     
         2 . The heat dissipation device of  claim 1 , wherein the latching recesses each have an inner extremity thereof communicating with the first portion of the through hole. 
     
     
         3 . The heat dissipation device of  claim 1 , wherein the first portion of each mounting foot has a peripheral inner wall, the latching recesses being defined in the inner wall of the first portion. 
     
     
         4 . The heat dissipation device of  claim 1 , wherein the latching portions extend oppositely from the outer circumference of the end of the shaft. 
     
     
         5 . The heat dissipation device of  claim 1 , wherein the latching recesses are radially alternated with the second portions of the through hole around the first portion, four blocks thereby being defined between the latching recesses and the second portions. 
     
     
         6 . The heat dissipation device of  claim 1 , wherein the latching portion has a bottom surface coplanar with a corresponding bottom face of the shaft. 
     
     
         7 . The heat dissipation device of  claim 1 , wherein each of the fasteners further comprises a head located at an opposite end of the shaft, the elastic member being compressed between the head and the corresponding mounting foot. 
     
     
         8 . The heat dissipation device of  claim 1 , wherein each of the fasteners further comprises a threaded pole extending downwards from the end of the shaft, a diameter of the threaded pole being smaller than that of the shaft. 
     
     
         9 . The heat dissipation device of  claim 1 , wherein the latching portions each have a columnar configuration parallel to an axis of the shaft. 
     
     
         10 . The heat dissipation device of  claim 1 , wherein the heat conductive body comprises a base and a heat conductive block coupled to a bottom of the base, the mounting feet extending radially outwardly from the base. 
     
     
         11 . The heat dissipation device of  claim 1 , further comprising a heat sink located over the heat conductive body, wherein the heat sink comprises a fin unit and a plurality of heat pipes thermally connected to the heat conductive body and extending through the fin unit. 
     
     
         12 . The heat dissipation device of  claim 11 , further comprising a heat radiator, which is located between the fin unit and the heat conductive body. 
     
     
         13 . The heat dissipation device of  claim 11 , wherein the heat sink further comprises a fan and a fan holder, the fan holder secures the fan to a lateral side of the fin unit, the fin unit defining a plurality of air passages, and the fan is positioned such that airflow generated by the fan can flow through the air passages of the fin unit. 
     
     
         14 . The heat dissipation device of  claim 13 , wherein the heat sink further comprises a wind guiding plate slanting downwardly and outwardly from a bottom fin of the fin unit for guiding the air flow generated by the fan to a circumference of the heat dissipation device. 
     
     
         15 . The heat dissipation device of  claim 13 , wherein the elastic member is a coil spring. 
     
     
         16 . A heat dissipation device comprising:
 a heat conductive body comprising a main portion and a plurality of mounting feet extending outwardly from the main portion; and   a plurality of fasteners mounted on the mounting feet, each of the fasteners comprising a shaft, an elastic member encircling the shaft, and a latching portion extending outwardly from an outer circumference of an end of the shaft;   wherein each of the mounting feet defines a through hole comprising a central first portion allowing extension of the end of the shaft therethrough and a second portion allowing extension of the latching portion therethrough, each mounting foot defining a latching recess in a bottom surface thereof, the latching recess bounded by two blocking surfaces;   wherein when the end of the shaft with the latching portion of each fastener extends through the through hole and beyond the bottom surface of a corresponding mounting foot, and the shaft is then rotated with respect to the through hole so as to cause the latching portion to be received in the latching recess and held therein by the elastic member, the blocking surfaces of the latching recess stop the latching portion from rotating with respect to the through hole and disengaging from the mounting foot.   
     
     
         17 . The heat dissipation device of  claim 16 , wherein the latching recess has an inner extremity thereof communicating with the first portion of the through hole. 
     
     
         18 . The heat dissipation device of  claim 16 , wherein the first portion of each mounting foot has a peripheral inner wall, the latching recess being defined in the inner wall of the first portion.