Recording and/or reproducing apparatus with sensor for detecting

Details Recording and/or reproducing apparatus with sensor for detecting Recording and/or reproducing apparatus with sensor for detecting

1992-07-31

1993-10-26

Smith, Jerry

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

369 4431, 360 60, 360 7804, 324173, G11B 1904, G11B 2736

Patent

active

052572552

ABSTRACT:
A head for writing data into and/or reading data out of a recording medium such as a magnetic disc is displaced along a path by a motor such as a voice coil motor. The moving member of the motor is disposed on one side of the path, and another moving member of a speed sensor for detecting the head displacement speed is disposed on the opposite side. As a result, an unbalanced mass arrangement with respect to the path along which the head is displaced will not occur. The signal from the speed sensor can be used, for example, to interrupt a write operation if a mechanical impact occurs. Furthermore, even in an embodiment in which a coil is wound around the moving member of the speed sensor so that the head displacement speed is detected as a voltage induced across the coil as the head is displaced, the motor and the speed sensor are disposed in spaced-apart-relationship with each other and the speed sensor is less susceptible to adverse effects caused by the leakage flux from the motor.

REFERENCES:
patent: 4692915 (1987-09-01), Moriya et al.
patent: 4792707 (1988-12-01), Katanuma
patent: 4803572 (1989-02-01), Haruna et al.
patent: 4906923 (1990-03-01), Aoyama
patent: 4967293 (1990-10-01), Aruga et al.

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