Latch mechanism for disk drive using magnetic field of actuator

Details Latch mechanism for disk drive using magnetic field of actuator Latch mechanism for disk drive using magnetic field of actuator

1996-03-27

1999-09-21

Cao, Allen T.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

G11B 554

Patent

active

059562137

ABSTRACT:
A parking device for an actuator in a storage device which includes a voice coil motor having a magnet, providing a magnetic field including a magnetic flux, and a coil coupled to the actuator. The parking device includes a magnetically permeable capture structure forming a path for the magnetic flux and generating a capture region, the capture region being a region of magnetic flux adjacent to the capture structure; and a capture member, having a face plate, coupled to the actuator such that the capture member enters the capture region to park the actuator when the actuator is in a park position. In a further aspect, the parking device includes a magnet structure supporting the magnet, having a top plate and a bottom plate, wherein the capture structure is positioned between the top and bottom plates and forms a magnetic circuit path for the magnetic flux with the magnet, and the top and bottom plates. In yet another aspect, the magnet structure comprises a support post member including an air gap to generate a fringe effect in the magnetic flux to provide the capture region and includes cavities such that the circuit path formed by the structure channels the magnetic flux to the gap.

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patent: 5329412 (1994-07-01), Stefansky
patent: 5483399 (1996-01-01), Jeong et al.
patent: 5568333 (1996-10-01), Bang

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