Head lifter mechanism for hard disk drive

Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Drum record

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Details

360 75, G11B 2112, G11B 2102

Patent

active

046618732

ABSTRACT:
A head lifter for a disk drive is electromagnetically actuated in order to securely remove the head/flexure assembly from the surface of the disk in order to avoid damage. The lifter operates in a fashion similar to a pair of scissors such that the motion of the armature in the electromagnetic loop produces motion in the opposite direction by the lifting arms thus accomplishing the lifting function. The lifting arms are specially shaped so as to securely retain the flexures away from the disk surface regardless of the relative location of the lifting arms with respect to the flexure. The lifting mechanism is provided with a magnetic shield which preserves the reliability of the data recorded on the disk. The lifting is accomplished by a spring which insures safe lifting in a power off condition. During normal operation of the disk drive, the electromagnetic loop draws a very low current in order to reduce the power requirements and further provide magnetic shielding. A unique dampener is also provided to control the rapid acceleration of the lifting arms during the picking movement of the armatures.

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