Browse Prior Art Database

Actuator Lock

IP.com Disclosure Number: IPCOM000099770D
Original Publication Date: 1990-Feb-01
Included in the Prior Art Database: 2005-Mar-15
Document File: 2 page(s) / 66K

Publishing Venue

IBM

Related People

Schopp, RE: AUTHOR

Abstract

The figure illustrates an actuator lock designed specifically for a disk drive rotary actuator, but the principles of its design are equally applicable to linear actuators. A leverage arrangement is used to amplify the armature motion. The leverage arrangement provides a self-compensating dynamic inertia system. This system together with a restore spring prevents the actuator lock from unlatching during accelerations that can occur during shipping.

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Actuator Lock

       The figure illustrates an actuator lock designed
specifically for a disk drive rotary actuator, but the principles of
its design are equally applicable to linear actuators.  A leverage
arrangement is used to amplify the armature motion.  The leverage
arrangement provides a self-compensating dynamic inertia system.
This system together with a restore spring prevents the actuator lock
from unlatching during accelerations that can occur during shipping.

      The figure shows the component positions of the actuator lock
while in an unenergized condition.  A coil assembly 2 is fastened to
a yoke 1 by means of a core 3 which is staked to the yoke.
A spring anchor 4 and a latch pivot bracket 5 are both welded to yoke
1.  A latch 6 rotates on pivot 7 that is held by bracket 5.  Latch
6 is urged clockwise against a stop surface provided by yoke 1, by
means of the restore spring 8 which pulls on an armature assembly 9.
Armature assembly 9 pivots above a surface provided by yoke 1 and is
consequently also urged in a clockwise direction.  The pivot
connection between armature assembly 9 and latch 6 enables the
clockwise urging of latch 6.  Armature assembly 9 comprises armature
10 and arm 11.

      When the latch is energized, the armature assembly 9 is rotated
counter-clockwise (CCW) until it is stopped by armature 10 touching
core 3.  When the armature assembly rotates CCW, it causes latch 6 to
also rotate CCW.  The distance between the p...