Mechanism for minute movement of a head

Details Mechanism for minute movement of a head Mechanism for minute movement of a head

1995-02-02

1998-06-09

Levy, Stuart S.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

G11B 554

Patent

active

057644446

ABSTRACT:
In a device which is adapted to write and read an information on and from a recording disk through a head and includes a head actuator for moving the head in a radial direction of the recording disk so as to position the head at a desired recording track on the recording disk, a mechanism for minute movement of a head provided at a part of the head actuator is capable of moving the head a very small distance independently of an operation of the head actuator. This mechanism for minute movement of a head is provided with expansion regions which are arranged symmetrically with respect to a center line of the head actuator and are separated by a clearance. Expansion members which are fixed on both or either of front and rear surfaces of the expansion regions, cause the expansion regions to expand or contract by the deformation thereof produced according to application of the power. A fixed region, which is provided continuously with an end of the expansion regions in an expanding direction thereof, is not displaced according to the expansion or contraction of the expansion regions. A movable region, which is provided continuously with the other end of the expansion regions in the expanding direction thereof, is displaced according to the expansion or contraction of the expansion region. A at least one hinge portion, which is formed between the movable region and the fixed region or between the movable region and the expansion region, displaces the movable region smoothly in a moving plane of the head.

REFERENCES:
patent: 4814908 (1989-03-01), Schmitz
patent: 5189578 (1993-02-01), Mori et al.
Imamura et al, "Piezoelectric Microactuator Compensating for Off-Track Errors in Magnetic Disk Drives," Oct. 4, 1992, pp. 119-126.
"Dynamic Head/Suspension Assembly Prezord Adjustment," Jun. 1986 Reproduced from Research Disclosure.
Dushkes and Surty, "Dynamically Adjustable Read-Write Head", IBM Technical Disclosure Y13N1.

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