Top cover, disk drive apparatus, and method of manufacturing top cover
AssigneeNidec Corporation
InventorJumpei OKUTANI
Life of this patent
Estimating the term…
Abstract
A top cover for use in a disk drive apparatus includes a plate made of a metal and a gasket fixed to the plate. The gasket is made of an elastomer. A surface of the plate includes a fixing region to which the gasket is closely adhered. The fixing region includes a plurality of ridges and in plan view a plurality of filamentous projections extending from each of the plurality of ridges. The plurality of ridges are arranged in the fixing region to increase a surface area of the fixing region. The plurality of ridges and the plurality of filamentous projections extending from each ridge are distributed over the fixing region.
Claims22
A top cover for use in a disk drive apparatus, the top cover comprising:
- a plate made of a metal;
- and
- a gasket made of an elastomer, and fixed to the plate;
- wherein
- a surface of the plate includes a fixing region to which the gasket is fixed;
- and
- in plan view, the fixing region includes a plurality of ridges and a plurality of filamentous projections extending from each of the plurality of ridges.
A disk drive apparatus comprising:
- a base plate including a bottom portion and a wall portion extending upward from an outer circumferential portion of the bottom portion, and surrounding the bottom portion;
- a top cover made of a metal, and arranged to close an upper side of the base plate to define a case together with the base plate;
- a gasket made of an elastomer, fixed to an upper end surface of the wall portion, and in contact with a lower surface of the top cover;
- a spindle motor;
- and
- an access portion configured to perform at least one of reading and writing of information from or to a disk supported by the spindle motor;
- wherein
- a rotating portion of the spindle motor and the access portion are accommodated in an interior of the case defined by the base plate and the top cover;
- the base plate includes, in the upper end surface of the wall portion, a fixing region to which the gasket is fixed;
- and
- in plan view, the fixing region includes a plurality of ridges and a plurality of filamentous projections extending from each of the plurality of ridges.
A method of manufacturing a top cover for use in a disk drive apparatus, the method comprising the steps of:
- a) defining, in a surface of a plate, a fixing region including a plurality of ridges and, in plan view, a plurality of filamentous projections extending from each of the plurality of ridges;
- b) cleaning the plate after step a);
- and
- c) injection-molding a gasket on the plate after step b);
- wherein in step c), the gasket is fixed to the fixing region.
Dependencies are inferred from the claim text.