Disk apparatus

Abstract

A disk apparatus includes a base including a bottom wall and a sidewall disposed along a peripheral portion of the bottom wall, a cover including a ceiling plate and a side plate disposed along a periphery of the ceiling plate, the ceiling plate being fixed to the sidewall and the side plate facing an outer surface of the sidewall, and a rotatable recording medium disposed between the cover and the bottom wall. The sidewall of the base includes a first portion adjacent to the recording medium and a protruding portion that protrudes from the first portion outward and away from the recording medium, and at least a portion of a sidewall of the protruding portion faces an opening formed in the side plate.

What is claimed is: 
     
         1 . A disk apparatus comprising:
 a recording medium;   a base comprising a bottom wall and a sidewall on the bottom wall, the sidewall comprising first and second portions, the first portion positioned closer to the recording medium than the second portion; and   a cover provided on the base and comprising
 a side portion at a position corresponding to the second portion of the sidewall and 
 a first opening at a position corresponding to the first portion of the sidewall. 
   
     
     
         2 . The disk apparatus according to  claim 1 , wherein
 the first position of the sidewall comprises a first protrusion protruding towards an outer side of the base.   
     
     
         3 . The disk apparatus according to  claim 2 , wherein
 a length of the first opening is greater than a length of the first protrusion in a longitudinal direction of the base.   
     
     
         4 . The disk apparatus according to  claim 3 , wherein
 the length of the first opening is less than 20 mm.   
     
     
         5 . The disk apparatus according to  claim 2 , wherein
 the sidewall of the base further comprises a second protrusion protruding towards an outer side of the base.   
     
     
         6 . The disk apparatus according to  claim 2 , wherein
 the first protrusion protrudes along a straight line passing through a center of the recording medium and perpendicular to a longitudinal direction of the base.   
     
     
         7 . The disk apparatus according to  claim 2 , further comprising:
 a magnetic head;   a carriage assembly supporting the head; and   a latch mechanism configured to latch the carriage assembly, wherein   the sidewall of the base comprises a second protrusion protruding towards an outer side of the base in a third portion adjacent to the latch mechanism and, and   the cover comprises a second opening at a position corresponding to the third portion.   
     
     
         8 . The disk apparatus according to  claim 1 , wherein
 the cover comprises a second opening along a longitudinal direction of the cover.   
     
     
         9 . The disk apparatus according to  claim 1 , further comprising:
 a sealing member between the cover and the sidewall of the base.   
     
     
         10 . The disk apparatus according to  claim 9 , wherein
 the cover further comprises a damper.   
     
     
         11 . The disk apparatus according to  claim 10 , wherein
 the damper is overlapped with the sealing member on the first portion of the sidewall.   
     
     
         12 . The disk apparatus according to  claim 10 , wherein
 the damper comprises a side edge portion having a length greater than a length of the first opening in a longitudinal direction of the base.   
     
     
         13 . The disk apparatus according to  claim 10 , wherein
 the cover comprises a recess portion in which the damper is provided, and   the recess portion comprises a side portion having a curved shape along a shape of the sealing member on the first portion of the sidewall.   
     
     
         14 . The disk apparatus according to  claim 9 , wherein
 the sealing member includes a curved portion that curves outward away from the recording medium and extends along the first protrusion.   
     
     
         15 . The disk apparatus according to  claim 9 , wherein
 a thickness of the damper is greater than a thickness of the cover.