Magnet type clamping mechanism and disc driving apparatus using

Details Magnet type clamping mechanism and disc driving apparatus using Magnet type clamping mechanism and disc driving apparatus using

1996-02-09

1997-09-23

Levy, Stuart S.

Dynamic information storage or retrieval

Dynamic mechanism subsystem

Specific detail of storage medium support or motion production

369264, G11B 2504

Patent

active

056712103

ABSTRACT:
In a magnet type clamping mechanism, a first magnet with a yoke is fixed in the outer periphery of a concave portion of a turn table which is fixed to a motor shaft. In the inner periphery of the concave portion of the turn table, a second magnet is provided on a yoke which is slidable along the shaft within a certain range. With respect to a disc having a hub with a large projection, the first magnet mainly generates clamping force. With respect to a disc having a hub with a small projection, both the first and second magnets generate clamping force, while the second magnet generates a main component of the clamping force.

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