Data storage device and magnetic disk drive in hermetically sealed condition
View Patent ↗Embodiments of the present invention provide a data storage device and a magnetic disk drive capable of maintaining the inside of a base in a hermetically sealed condition. In one embodiment, a data storage device includes a recording disk, a base having a through hole, a top cover having a tapping hole aligned with the through hole and a depressed portion with the tapping hole formed in a bottom thereof, and a screw inserted through the through hole into threaded engagement with the tapping hole and having a head which comes into close contact with an outer surface of the base. The top cover is fitted inside the base in a state in which the depressed portion is positioned on the base side, and the bottom of the depressed portion comes into close contact with the base in the threadedly engaged state of the screw and in an area which surrounds the through hole.
1. 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.
2. A data storage device according to claim 1 , wherein said base is formed by press working.
3. A data storage device according to claim 1 , wherein said hole is a through hole, and said screw is threadedly engaged with said tapping hole in an inserted state thereof through said through hole.
4. A data storage device according to claim 1 , further comprising a sealing tape which covers said tapping hole, wherein said sealing tape comes into close contact with an outer periphery of said depressed portion to seal the depressed portion hermetically.
5. A data storage device according to claim 4 , wherein said sealing tape is a single sealing tape which covers the whole surface of said top cover.
6. A data storage device according to claim 1 , wherein said depressed portion has a projecting portion formed on the bottom thereof, and said tapping hole is a burring tap formed within said projecting portion.
7. 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;
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; and
a sealing tape which covers said tapping hole;
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, the bottom of said depressed portion is put in close contact with said base in an area which surrounds said hole and in the threadedly engaged state of said screw, said sealing tape is put in close contact with an outer periphery of said depressed portion to seal the depressed portion hermetically, said depressed portion has a projecting portion formed on the bottom thereof, and said tapping hole is a burring tap formed within said projecting portion.
8. A data storage device according to claim 7 , wherein said base is formed by press working.
9. A data storage device according to claim 7 , wherein said hole is a through hole, and said screw is threadedly engaged with said tapping hole in an inserted state thereof through said through hole.
10. A data storage device according to claim 7 , wherein said top cover is fitted inside said base and along an outer periphery of said base, and said sealing tape is put in close contact with said top cover and said base to seal a gap formed between the base and the top cover.
11. A data storage device according to claim 7 , wherein said sealing tape is a single sealing tape which covers the whole surface of said top cover.
12. A data storage device according to claim 7 , wherein said top cover has a close-contact portion which, in the threadedly engaged state of said screw, comes into close contact with the surface on the top cover side of said base in a surrounding relation to said through hole.
13. A data storage device according to claim 7 , wherein said top cover has a close-contact portion which, in the threadedly engaged state of said screw, comes into close contact with the surface on the top cover side of said base in a surrounding relation to said through hole, said top cover is fitted inside said base and along an outer periphery of said base, and said sealing tape is put in close contact with said top cover and said base to seal a gap formed between the base and the top cover.
14. A data storage device according to claim 7 , wherein said top cover is fitted inside said base and along an outer periphery of said base, said sealing tape is put in close contact with said top cover and said base to seal a gap formed between the base and the top cover, 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, the bottom of said depressed portion is put in close contact with said base in an area which surrounds said hole and in the threadedly engaged state of said screw, and said sealing tape is put in close contact with an outer periphery of said depressed portion to seal the depressed portion hermetically.
15. A data storage device according to claim 14 , wherein said depressed portion has a projecting portion formed on the bottom thereof, and said tapping hole is a burring tap formed within said projecting portion.
16. A magnetic disk drive comprising:
a magnetic disk to record magnetic data;
a motor to rotate said magnetic disk;
a head to make access to a recording area on said magnetic disk;
a base formed from a single magnetic plate and which accommodates said magnetic disk, said motor and said head;
a top cover fitted inside said base and along an outer periphery of said base;
a sealing tape which is put in close contact with said top cover and said base to seal a gap formed between the base and the top cover; and
a screw to attach said base to said top cover;
wherein said top cover has a depressed portion depressed on said base side and with a tapping hole formed in a bottom thereof, said screw is inserted through a hole formed in said base from a side opposite said top cover with respect to said base and is threadedly engaged with said tapping hole, said screw has 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, the bottom of said depressed portion is put in close contact with said base in an area which surrounds said hole and in the threadedly engaged state of said screw, and said sealing tape is put in close contact with an outer periphery of said depressed portion to seal the depressed portion hermetically.
17. A magnetic disk drive according to claim 16 , wherein said sealing tape is a single sealing tape which covers the whole surface of said top cover.
18. A magnetic disk drive according to claim 16 , wherein said depressed portion has a projecting portion formed on the bottom thereof, and said tapping hole is a buffing tap formed within said projecting portion.