Heat dissipation device

Abstract

A heat dissipation device includes a base, a sleeve coupling with the base, and a fastener engaging with the base and the sleeve. The base defines a hole extending therethrough. The sleeve includes a first portion coupling with the hole of the base and a second portion extending from an end of the first portion. The second portion is located at a first side of the base. The fastener includes a body portion extending through the sleeve and the base, a head portion and a foot portion formed at two ends of the body portion, respectively. The head portion is located at the first side of the base. A spring member is compressed between the head portion and the second portion. A compressed length of the spring member is adjustable by adjusting a coupling length of the first portion with the hole of the base.

1 . A heat dissipation device comprising:
 a base defining a hole extending therethrough;   a sleeve coupling with the hole of the base, a through hole extending through the sleeve;   a fastener comprising a body portion extending through the through hole of the sleeve, a head portion extending upwardly from an end of the body portion, a foot portion extending downwardly from another end of the body portion, a spring member being compressed between the head portion and the sleeve, a compressed length of the spring member capable of being varied by adjusting a coupling length of the sleeve with the hole of the base.   
   
   
       2 . The heat dissipation device of  claim 1 , wherein the hole of the base is a thread hole, and the sleeve comprises a thread portion engaging in the thread hole of the base. 
   
   
       3 . The heat dissipation device of  claim 2 , wherein the sleeve comprises an abutting portion extending upwardly from an end of the thread portion and located at a side of the base, the spring member being compressed between the head portion of the fastener and the abutting portion. 
   
   
       4 . The heat dissipation device of  claim 3 , wherein the abutting portion of the sleeve has a flat face supporting the spring member. 
   
   
       5 . The heat dissipation device of  claim 3 , wherein the abutting portion of the sleeve has a regular-hexagonal-prism profile. 
   
   
       6 . The heat dissipation device of  claim 1 , wherein the foot portion of the fastener is machined with a plurality of threads thereon. 
   
   
       7 . The heat dissipation device of  claim 1 , wherein the body portion of the fastener defines an annular groove therein to form a locking portion between the head portion and the foot portion, the locking portion being located at another side of the base, a collar snapping with the body portion at the locking portion. 
   
   
       8 . The heat dissipation device of  claim 1 , wherein the spring member is helical and circles the body of the fastener. 
   
   
       9 . The heat dissipation device of  claim 1 , wherein the foot portion of the fastener has a diameter less than that of the body portion. 
   
   
       10 . A heat dissipation device comprising:
 a base;   a sleeve having a first portion engaging with the base and a second portion located at a first side of the base;   a fastener comprising a head portion located at the first side of the base, a body portion extending through the sleeve and the base, and a foot portion located at a second side of the base, a spring member being compressed between the head portion and the second portion of the sleeve, a compressed length of the spring member capable of being adjusting by adjusting a coupling length of the first portion of the sleeve with the base.   
   
   
       11 . The heat dissipation device of  claim 10 , wherein the base defines a thread hole, the second portion of the sleeve is machined with threads at a periphery thereof, the threads engaging with the thread hole. 
   
   
       12 . The heat dissipation device of  claim 10 , wherein the second portion of the sleeve has a flat face supporting the spring member. 
   
   
       13 . The heat dissipation device of  claim 12 , wherein the second portion of the sleeve has a regular-hexagonal-prism profile. 
   
   
       14 . The heat dissipation device of  claim 10  further comprising a fin set, wherein the fin set is arranged on the base. 
   
   
       15 . The heat dissipation device of  claim 14  further comprising a plurality of heat pipes connecting with base and the fin set, wherein each of the heat pipes comprises an evaporating section located between the base and the fin set, and a condensing section remote from the base and contacting the fin set. 
   
   
       16 . The heat dissipation device of  claim 15 , wherein the fin set defines a plurality of slots radially extending from a bottom of the fin set toward a top of the fin set, the evaporating sections of the heat pipes being received in bottom ends of the slots, the condensing sections of the heat pipes being in top ends of the slots. 
   
   
       17 . The heat dissipating device of  claim 16 , wherein the base defines a cutout in a side thereof, corresponding to ends of the evaporating sections of the heat pipes. 
   
   
       18 . The heat dissipation device of  claim 14 , wherein the fin set defines a cutout corresponding to the fastener.