Hollow Arm, Low Inertia Actuator With Damper And Self Sustained Air Bearing
Original Publication Date: 1982-Mar-01
Included in the Prior Art Database: 2005-Feb-09
This actuator is designed to move the read/write transducer on magnetic recording disks. The motion is obtained by the force generated in a moving coil 10 wound on a hollow cylindrical aluminum arm 11 which moves in an air gap between the housing and a cylindrical permanent magnet 12, and which has an orifice lla at one end thereof. The design is thus basically the conventional moving-coil type. However, the following features are new. 1. Arm 11 is hollow. This provides the most efficient mass distribution and permits high rigidity with low inertia. The lowering of the moving mass permits a compact design of the actuator. 2. Arm 11 slides on the magnet 12, requiring no additional guidance. 3.