Heat-dissipation unit and method of manufacturing same

Abstract

A heat-dissipation unit includes a base and a plurality of radiating fins. The base has a plurality of grooves formed thereon, and each of the grooves has an open top and closed bottom. The radiating fins respectively have a heat-radiating zone and a bent zone. When a pressure is applied onto the bent zones, the bent zones respectively form an assembling section in the grooves to tightly fit therein. With the above arrangements, the radiating fins can be firmly locked to the base without the need of welding, so that the manufacturing cost is reduced and the problem of a damaged base due to assembling can be avoided. A method of manufacturing the above-described heat-dissipation unit is also disclosed.

What is claimed is: 
     
         1 . A heat-dissipation unit, comprising:
 a base having a plurality of grooves formed thereon, and each of the grooves having an open top and a closed bottom; and   a plurality of radiating fins, each of which including a heat-radiating zone and a bent zone perpendicular to the heat-radiating zone and forming an assembling section; the bent zones being correspondingly positioned on the open tops of the grooves, and the assembling sections being correspondingly tightly fitted in the grooves.   
     
     
         2 . The heat-dissipation unit as claimed in  claim 1 , wherein each of the grooves further has a first lateral side and a second lateral side correspondingly raised from two opposite lateral edges of the closed bottom. 
     
     
         3 . The heat-dissipation unit as claimed in  claim 2 , wherein each of the grooves further has at least one inward and downward inclined zone. 
     
     
         4 . The heat-dissipation unit as claimed in  claim 3 , wherein the inclined zone is formed on at least one of the first lateral side and the second lateral side of the groove. 
     
     
         5 . A method of manufacturing heat-dissipation unit, comprising the steps of:
 providing a base having a plurality of grooves formed thereon, and each of the grooves having an open top and a closed bottom;   providing a plurality of radiating fins, each of which having a heat-radiating zone and a bent zone perpendicular to the heat-radiating zone, and flatly positioning the bent zones on the open tops of the grooves; and   applying a pressure onto the bent zones, so that the bent zones respectively form an assembling section in the grooves to tightly fit therein, bringing the radiating fins to lock to the base.   
     
     
         6 . The heat-dissipation unit manufacturing method as claimed in  claim 5 , wherein the assembling sections are tightly fitted in the grooves through mechanical process. 
     
     
         7 . The heat-dissipation unit manufacturing method as claimed in  claim 6 , wherein the mechanical process is stamping. 
     
     
         8 . The heat-dissipation unit manufacturing method as claimed in  claim 5 , wherein each of the grooves further has a first lateral side and a second lateral side, which being correspondingly raised from two lateral edges of the closed bottom of the groove. 
     
     
         9 . The heat-dissipation unit manufacturing method as claimed in  claim 8 , wherein each of the grooves further has at least one inward and downward inclined zone. 
     
     
         10 . The heat-dissipation unit manufacturing method as claimed in  claim 9 , wherein the inclined zone is formed on at least one of the first lateral side and the second lateral side of the groove. 
     
     
         11 . The heat-dissipation unit manufacturing method as claimed in  claim 10 , further comprising a step after the step of forming the assembling sections to further apply a pressure onto the assembling sections for the same to fitly bear on the inclined zones, so that the radiating fins are firmly locked to the base.