Heat-dissipation base structure

Abstract

A heat-dissipation base structure includes a main board and at least one mounting member. The main board has four chamfered corners to form four pressing ends and is provided on an upper face with at least one retaining section. The mounting member is provided with at least one locating section for engaging with the at least one retaining section, and includes at least one outward extended arm portion. The arm portion is formed along a bottom with a downward protruded portion, so an opening is formed on the arm portion at a proximal end of the downward protruded portion for engaging with one pressing end of the main board when the mounting member and the arm portion are mounted to the upper face of the main board. Therefore, the heat-dissipation base structure has increased structural strength and the arm portion is less possibly deformed due to bending stress therein.

What is claimed is: 
     
         1 . A heat-dissipation base structure, comprising:
 a main board having four chamfered corners to form a pressing end each, and being provided on an upper face with at least one retaining section; and   at least one mounting member being provided with at least one locating section for correspondingly engaging with the at least one retaining section on the main board, and including at least one horizontally outward extended arm portion; the arm portion being so configured that a downward protruded portion is formed along a bottom thereof and an opening is formed on the arm portion at a proximal end of the downward protruded portion to correspond to one pressing end of the main board.   
     
     
         2 . The heat-dissipation base structure as claimed in  claim 1 , wherein the arm portion is provided on a distal end thereof with at least one mounting hole. 
     
     
         3 . The heat-dissipation base structure as claimed in  claim 1 , wherein the mounting member and the arm portion are connected to the upper face of the main board. 
     
     
         4 . The heat-dissipation base structure as claimed in  claim 3 , wherein the downward protruded portion of the arm portion is located below a plane defined by a lower face of the main board. 
     
     
         5 . The heat-dissipation base structure as claimed in  claim 1 , wherein the pressing end at each corner of the main board is aligned and engaged with the opening at the proximal end of the downward protruded portion of the arm portion. 
     
     
         6 . The heat-dissipation base structure as claimed in  claim 1 , wherein the arm portion further includes a bent section. 
     
     
         7 . The heat-dissipation base structure as claimed in  claim 6 , wherein the downward protruded portion is also formed on one side surface of the bent section facing toward the main board.