Disk drive actuator latch

Details Disk drive actuator latch Disk drive actuator latch

1993-11-10

1994-11-08

Heinz, A. J.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

G11B 554

Patent

active

053632613

ABSTRACT:
A magnetic bistable latch mechanism for latching the actuator of a disk drive in a parked position is described. The latch comprises a magnetically detented latch lever which engages and latches a latch arm in a parked position. The latch arm is part of actuator motor structure and accordingly latches the actuator motor. The latch lever is held in either the latched or unlatched position by magnetic attraction and resists shocks and impacts that otherwise would move the actuator. The latch lever is shifted from one position t the other by the actuator motor eliminating the need for additional circuitry or mechanisms to control the latch. Additionally, the latch does not consume any electrical power in either the latched or unlatched condition.

REFERENCES:
patent: 4562500 (1985-12-01), Bygnes
patent: 4881139 (1989-11-01), Hazebrouck
patent: 5003422 (1991-03-01), Sun et al.
patent: 5117318 (1992-05-01), Immler et al.
patent: 5208713 (1993-05-01), Lindsay et al.
patent: 5231556 (1993-07-01), Blanks
IBM Technical Disclosure Bulletin, vol. 36, No. 3, Mar. 1993, pp. 7-9, M. Sri-Jayantha and V. D. Khanna, "A Bistable, Zero Steady-State Power, Rotary-Actuator Lock for DASD."

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