Patent ID: 7570455

Claim:
A data storage device comprising: a medium to record data; a base in which said medium is accommodated, said base formed from a single magnetic plate and having a hole; a top cover having a tapping hole aligned with said hole of said base; and a screw inserted through said hole from a side opposite said top cover with respect to said base and into threaded engagement with said tapping hole, said screw having a head which comes into direct contact with a bottom surface of said base and a portion opposite said head of said screw extending from said tapping hole of said top cover; wherein said top cover is fitted inside said base and is put in close contact with said base in an area which surrounds said hole and in the threadedly engaged state of said screw; wherein said top cover has a depressed portion, said tapping hole is formed in a bottom of said depressed portion, said top cover is fitted inside said base in a state in which said depressed portion is positioned on said base side, and the bottom of said depressed portion is put in close contact with said base in the area which surrounds said hole.