Thermal isolation of the voice coil motor from base plate and ca

Details Thermal isolation of the voice coil motor from base plate and ca Thermal isolation of the voice coil motor from base plate and ca

1985-11-20

1988-05-17

Wolff, John H.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

360106, 360109, G11B 555, G11B 2120

Patent

active

047455012

ABSTRACT:
A disc drive is disclosed including a base that includes a first section for mounting the motor that supports and spins the discs, and a second section for mounting the actuator and the carriage which is to carry the transducers toward and away from the discs. The voice coil motor itself consists of two halves. Each half is mounted to the base using a flange located between the carriage guide rods on which the carriage will ride. This mounting flange has two attachment points: a first mounting point at the end of the flange farthest from the discs, which is fixed in all axes, and a second mounting point at the end of the flange closest to the discs, which prevents relative movement between the base and the voice coil motor in the axes perpendicular to and tangential to the discs, but allows differential expansion along the axis radial to the discs. Since each voice coil motor half is independently mounted to the base, and since each motor half has only one fixed mounting point along any one axis, the base is free to thermally expand and contract around the voice coil motor without distorting.

REFERENCES:
patent: 4553183 (1985-11-01), Brown et al.

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