Heat sink

Abstract

The heat sink includes a tube and a plurality of fins. The tube has slots and grooves. Each the groove is located between two adjacent ones of the grooves. The fins are separately fastened to the slots. Each the fin has two walls separately fastened to two of the grooves and a bridge connected between the two walls. An airflow passage is formed among the bridge and the walls.

1 . A heat sink comprising:
 a tube, having slots and grooves, wherein each the groove is located between two adjacent ones of the grooves; and   a plurality of fins, separately fastened to the slots, wherein each the fin has two walls separately fastened to two of the grooves and a bridge connected between the two walls, and an airflow passage is formed among the bridge and the walls.   
     
     
         2 . The heat sink of  claim 1 , further comprising a bridge disposed between the two walls. 
     
     
         3 . The heat sink of  claim 2 , wherein the bridge has at least one through hole. 
     
     
         4 . The heat sink of  claim 1 , wherein each of the walls is provided with at least one through hole. 
     
     
         5 . The heat sink of  claim 1 , wherein a top of each the fin has an engagement portion. 
     
     
         6 . The heat sink of  claim 1 , wherein a bottom of each the fin has a recess. 
     
     
         7 . The heat sink of  claim 1 , wherein the bridge has an open area. 
     
     
         8 . The heat sink of  claim 1 , wherein the bridge is planar.