Miniature magnetic disk device and voice coil actuator thereof

Details Miniature magnetic disk device and voice coil actuator thereof Miniature magnetic disk device and voice coil actuator thereof

1996-12-16

1997-09-23

Hindi, Nabil

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

369 75, G11B 700

Patent

active

056711972

ABSTRACT:
A miniature magnetic disk device or a miniature optical disk device has a recording disk having a diameter less than or equal to 0.7 inches. The disk device also includes a spindle motor which rotates the recording disk, a read/write head for recording or reproducing information on and from the recording disk, a support member which holds the read/write head, and a support shaft which is coupled to the support member. A voice coil motor, which is coupled to the support member and the support shaft, sets the read/write head in a desired position over the disk. A resistor which has a value of at least 2.5.OMEGA. is connected in series with a coil of the voice coil motor, and the resistor makes it possible to reduce power consumption of the voice coil motor. The resistor may be a variable resistor, and a conductor of the coil may have a cross-sectional area less than 2.55.times.10.sup.-3 mm.sup.2. A ratio h/t of a thickness h of the coil to a thickness t of a magnetic circuit of the voice coil motor have be at least 0.25. Moreover, by mounting several of these disks on a board which is standardized as PCMCIA type 3, a miniature array disk device is formed.

REFERENCES:
patent: 5204593 (1993-04-01), Ueki
patent: 5257255 (1993-10-01), Morimoto et al.
patent: 5264975 (1993-11-01), Bajorek et al.
patent: 5325252 (1994-06-01), Yagi et al.
patent: 5375021 (1994-12-01), Boeckner
patent: 5384524 (1995-01-01), Romano
patent: 5402200 (1995-03-01), Shrinkle et al.
patent: 5412809 (1995-05-01), Tam et al.

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