Miniature head disc drive system voice coil with single coil and

Details Miniature head disc drive system voice coil with single coil and Miniature head disc drive system voice coil with single coil and

1995-06-07

1998-09-15

Evans, Jefferson

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

360 9701, G11B 554

Patent

active

058088385

ABSTRACT:
A disc drive system having at least one hard disc having concentric tracks is supported by a hub positioned in a centrally located aperture. The disc is rotated at a constant speed by a DC motor attached to the hub. A transducer head for communicating information with the hard disc is moved relative to the disc surface by a positioning apparatus. The positioning apparatus includes a voice coil motor for selectably and accurately positioning the transducer head over the tracks on the hard disc. The disc drive system is enclosed in a housing having a base portion and a roof portion. The positioning apparatus includes a shaft about which the transducer head rotates to move the transducer from track to track. In one configuration, permanent magnets are attached to the base and roof, and a moving coil is interposed between them, the housing completing a magnetic circuit in the VCM. In one aspect the disc drive system is designed to be permanently mounted in a portable, lap-top or notebook computer. Alternatively, it is adaptable for insertion and removal from a connector port in the computer.

REFERENCES:
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patent: 4875117 (1989-10-01), Slezak et al.
patent: 4881139 (1989-11-01), Hazerbouck
patent: 4941062 (1990-07-01), Yoshioka
patent: 4956733 (1990-09-01), Dalzid et al.
patent: 4965684 (1990-10-01), Stefansky
patent: 4965691 (1990-10-01), Iftikar et al.
patent: 4985793 (1991-01-01), Anderson
patent: 5025335 (1991-06-01), Stefansky
patent: 5025336 (1991-06-01), Morehouse et al.
patent: 5034837 (1991-07-01), Schmitz
PC Week vol. 6, No. 44; Kristina Sullivan; "Prairie Tek Planning 2.5 inch Hard Drive for Notebook PC", Nov. 6, 1989.

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