Swing-type actuator

Details Swing-type actuator Swing-type actuator

1994-05-04

1995-01-17

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Linear

310 42, H02K 3300

Patent

active

053828518

ABSTRACT:
A swing-type actuator includes a coil, at least one arm and a thermoplastic body joining the coil and the arm. In one embodiment, the arm is preferably a generally planar aluminum stamping having an opening to which the read/write head may be mounted at one end thereof. A feature is located in the opposite end of the arm to facilitate attachment to the thermoplastic body. The arm also includes at least one flat side perpendicular to its plane at the end including the notch. The body is molded around a portion of the arm and cooperates with the feature to secure the arm thereto. The body also overlaps part of the coil and surrounds the outer circumference thereof. A journal is formed in the body for receiving a shaft on which the actuator pivotally rotates. A grounding pin extending through the arm prevents static charge build-up. Alternatively, a portion of the arm may extend into the journal to contact the bearing. According to another embodiment of the present invention, the arm includes a plastic portion and a metal mounting pad. The plastic portion is molded around a securement portion of the mounting pad to form the arm. The body is then molded around portions of the arm and the coil in the same manner as the first embodiment of the invention. The plastic portion of the arm is preferably formed of electrically conductive material and is provided with a grounding pin to facilitate discharging of static charge.

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