Disk drive device
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsKinjirou Okinaga, Masahito Hidaka, Koji Kuyama
Life of this patent
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Abstract
The present invention provides a disk drive device that can appropriately clamp a disk by means of magnetic force even when the disk drive device is very small. A clamping magnet 16 on which a disk 20 is mounted is attached to a turntable portion 15b of a rotor frame 15 to attract the disk 20. The clamping magnet 16 is configured so that the disk 20 can be mounted on the clamping magnet 16. An area of the rotor frame 15 from the turntable portion 15b to a boss portion 15a is composed of a ferromagnetic material.
Claims6
A disk drive device comprising a rotor frame to which a rotating shaft is fixed, the rotor frame having a boss portion to which the rotating shaft is fixed and which is inserted through a disk hole, a turntable portion extending outward in a radial direction from the boss portion, and a cylindrical portion extending cylindrically from an outer periphery of the turntable portion, the disk drive device further comprising a clamping magnet attached to the turntable portion to attract a disk and on which the disk is mounted, the clamping magnet being configured so that the disk can be mounted on the clamping magnet, an area of the rotor frame from the turntable portion to the boss portion comprising a ferromagnetic material.
Dependencies are inferred from the claim text.