Magnetic head lifting device for magneto-optical recording/repro

Details Magnetic head lifting device for magneto-optical recording/repro Magnetic head lifting device for magneto-optical recording/repro

1991-05-22

1992-12-01

Nguyen, Hoa

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

360 59, 360 66, 360114, G11B 1304, G11B 1110, G11B 1112

Patent

active

051684845

ABSTRACT:
A head protection control for a magneto-optical recording/reproducing device, including an elastic arm for mounting a magnetic head at one end portion of the arm and biasing the magnetic head in a direction contacting a surface of a magneto-optical disk, which elastic arm is movable in a radial direction of the magneto-optical disk; a driver for driving the elastic arm in a direction moving away from the surface of the magneto-optical disk; a phase-locked loop (PLL) for generating a lock signal when the PLL circuit becomes synchronous with a clock signal in a reproduced signal from the magneto-optical disk; and a controller for controlling the driver so as to cause the driver, upon receipt of the lock signal, to lower the magnetic head to face the magneto-optical disk during rotation at the predetermined speed with a fine gap defined between the magnetic head and the magneto-optical disk by a flying force due to an air stream. It is accordingly possible to prevent damage of the magnetic head or the disk surface even when the magnetic head sticks to the disk surface.

REFERENCES:
patent: 5095475 (1992-03-01), Oka et al.
English Translation of JP/01-211259.

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