Device cover

Abstract

A device cover includes a bottom base and at least one sidewall extending from the bottom base. The at least one sidewall is formed by an upsetting process. The device cover is made of metal. Only one fold is formed by flow tracks of metallic grain of the at least one sidewall.

What is claimed is: 
     
         1 . A device cover, comprising:
 a bottom base; and   at least one sidewall extending from the bottom base;   wherein the at least one sidewall is formed by an upsetting process; the device cover is made of metal; only one fold is formed by flow tracks of metallic grain of the at least one sidewall.   
     
     
         2 . The device cover of  claim 1 , wherein the at least one sidewall comprises an angled contact surface, and an angle defined by the contact surface relative to an axis of the at least one sidewall is about 55° to about 65°. 
     
     
         3 . The device cover of  claim 2 , wherein the contact surface angles toward the bottom base. 
     
     
         4 . The device cover of  claim 1 , wherein the device cover is made of aluminum alloy. 
     
     
         5 . The device cover of  claim 1 , wherein a ratio of a thickness of the at least one sidewall with to thickness of the bottom base is about 1 to about 1.76. 
     
     
         6 . The device cover of  claim 1 , wherein the bottom base is rectangular, and the at least one sidewall extends substantially perpendicularly from a periphery of the rectangular bottom base.