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US 2003/0197436 A1Published application
Disk rotating motor and disk apparatus
AssigneeNone recorded
InventorAtsushi Takahashi
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AssigneeNone recorded
InventorAtsushi Takahashi
Estimating the term…
An HDD has a spindle motor that supports a magnetic disk such that the disk can rotate. The spindle motor is formed by attaching a rotatable hub to the bottom plate of a housing, providing a magnet concentric with the hub, and providing a stator coil concentric with the magnet, with a predetermined gap therebetween. Further, a yoke is attached to the surface of the magnet opposing the bottom plate, thereby blocking the leakage of magnetic flux directed from the magnet to the bottom plate. As a result, the rotational loss of the hub due to the leakage of magnetic flux can be suppressed, and hence the rotational efficiency of the motor can be enhanced.
A disk rotating motor comprising:
A disk apparatus comprising:
A disk rotating motor comprising:
Dependencies are inferred from the claim text.
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Of discs rotating during transducing operation: by permanent connections, e.g. screws, rivets
The rotor consisting of two or more circumferentially positioned magnets: surface mounted magnets; Inset magnets
For shielding from electromagnetic fields , i.e. structural association with shields: shields associated with rotating parts, e.g. rotor cores or…
The rotor consisting of a single magnet or two or more axially juxtaposed single magnets: annular magnets
Term end not estimated
This application is based upon and claims the benefit of priority from the prior Japanese Patent Application No. 2002-122727, filed Apr. 24, 2002, the entire contents of which are incorporated herein by reference.
1. Field of the Invention
The present invention relates to a disk apparatus for recording/reproducing data to/from a disk medium, and a disk rotating motor for rotating the disk medium.
The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention, and together with the general description given above and the detailed description of the embodiments given below, serve to explain the principles of the invention.
FIG. 1 is an exploded perspective view illustrating an HDD according to the invention;
FIG. 2 is a sectional view illustrating a spindle motor according to a first embodiment employed in the HDD of FIG. 1; and
Embodiments of the invention will now be described in detail with reference to the accompanying drawings.
FIG. 1 is an exploded perspective view illustrating an HDD (disk apparatus) according to the invention.
As shown, an HDD 1 comprises a substantially rectangular housing 2 (base member) with an upper opening, and a top cover 4. The housing 2 is an aluminum die casting (conductive member) or an iron plate (magnetic member). The top cover 4 is attached to the housing 2 by plural screws 5 with a gasket 3 interposed therebetween, thereby closing the upper opening of the housing.