Heat dissipation device

Abstract

A heat dissipation device includes a first heat sink and a second heat sink. The first heat sink includes a first heat spreader and a plurality of fins. The first heat spreader includes a receiving structure having a first tooth and two second teeth. The first tooth is located between the second teeth to define two first grooves between the first tooth and the second teeth. The second heat sink includes a second heat spreader and a plurality of fins. The second heat spreader includes a protruding structure having two first inserting portions. When the second heat sink is assembled to the first heat sink, the each of the first inserting portions is inserted in the first groove of the first heat spreader and deformed to be firmly engaged in the first groove and clasped by the first tooth.

What is claimed is: 
     
         1 . A heat dissipation device comprising:
 a first heat sink comprising a first heat spreader and a plurality of fins extending from the first heat spreader, the first heat spreader comprising a receiving structure, the receiving structure comprising a first tooth and two second teeth, the first tooth being located between the second teeth to define two first grooves between the first tooth and the second teeth; and   a second heat sink comprising a second heat spreader and a plurality of fins extending from the second heat spreader, the second heat spreader comprising a protruding structure, the protruding structure comprising two first inserting portions;   wherein when the second heat sink is assembled to the first heat sink, the each of the first inserting portions is inserted in the first groove of the first heat spreader and deformed to be firmly engaged in the first groove and clasped by the first tooth.   
     
     
         2 . The heat dissipation device of  claim 1 , wherein a top one of the first grooves slants upwardly and the bottom one of the first grooves slants downwards from inside to outside. 
     
     
         3 . The heat dissipation device of  claim 2 , wherein the first tooth has a thickness gradually increasing from a root jointed to the first heat spreader to an outer free end of the first tooth, each of the second teeth having a thickness gradually decreasing from a root jointed to the first heat spreader to an outer free end thereof. 
     
     
         4 . The heat dissipation device of  claim 3 , wherein the first tooth has a dovetailed section and each of the second teeth has a triangular section. 
     
     
         5 . The heat dissipation device of  claim 2 , wherein each of the first inserting portions has a smooth free end. 
     
     
         6 . The heat dissipation device of  claim 2 , wherein the first inserting portions are parallel to each other before engaging into the first grooves. 
     
     
         7 . The heat dissipation device of  claim 6 , wherein the first tooth has two clasping surfaces, each of the second teeth having a guiding surface facing the adjoining clasping surface, the first inserting portions being guided by the guiding surfaces into the first grooves and clasped by the clasping surfaces after assembly. 
     
     
         8 . The heat dissipation device of  claim 1 , wherein the receiving structure comprises two third teeth, each of the second teeth and adjoining third tooth together defining a second groove, the protruding structure comprising two second inserting portions to insert into the second grooves. 
     
     
         9 . The heat dissipation device of  claim 1 , wherein each of the first heat sink and the second heat sink is made of aluminum extrusion and is extruded along a lengthways direction from a front end to a rear end thereof. 
     
     
         10 . A heat dissipation device comprising a plurality of heat sinks, each of the heat sink comprising a heat spreader and a plurality of fins extending from the heat spreader, the heat spreader comprising a receiving structure and a protruding structure, the receiving structure comprising a first tooth and two second teeth, the first tooth being located between the second teeth to define two first grooves between the first tooth and the second teeth, the protruding structure comprising two first inserting portions, the first inserting portions of the protruding structure of one heat sink being inserted in the first grooves of the receiving structure of another heat sink and deformed to be firmly engaged in the first groove and clasped by the first tooth. 
     
     
         11 . The heat dissipation device of  claim 10 , wherein a top one of the first grooves slants upwardly and the bottom one of the first grooves slants downwards from inside to outside. 
     
     
         12 . The heat dissipation device of  claim 11 , wherein the first tooth has a thickness gradually increasing from a root jointed to the heat spreader to an outer free end of the first tooth, each of the second teeth having a thickness gradually decreasing from a root jointed to the heat spreader to an outer free end thereof. 
     
     
         13 . The heat dissipation device of  claim 12 , wherein the first tooth has a dovetailed section and each of the second teeth has a triangular section. 
     
     
         14 . The heat dissipation device of  claim 11 , wherein each of the first inserting portions has a smooth free end. 
     
     
         15 . The heat dissipation device of  claim 11 , wherein the first inserting portions are parallel to each other before engaging into the first grooves. 
     
     
         16 . The heat dissipation device of  claim 10 , wherein each of the heat sinks is made of aluminum extrusion and is extruded along a lengthways direction from a front end to a rear end thereof.