Latch mechanism for rotary actuator and the like
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United States of America Patent
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Nov 14, 1989
Issued Date -
N/A
app pub date -
Apr 14, 1988
filing date -
Jan 25, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A latch mechanism for use in a disc drive rotary actuator and like magnetic device includes a selectively energizable electromagnet mounted to the actuator and spaced from the magnets, and a ferrous arm pivotally attached between the magnets and the electromagnet whereby the latch arm can assume two stable positions of low magnetic reluctance for stray flux from the magnets. In one position the latch arm pivots towards the magnets and engages the rotary actuator. In the other position, the latch arm pivots towards the electromagnet and disengages the rotary actuator. Positioning of the latch arm is dependent on momentary energization and polarity of the electromagnet.
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