Drive motor having moving rotor for compact disc player apparatu

Details Drive motor having moving rotor for compact disc player apparatu Drive motor having moving rotor for compact disc player apparatu

1984-07-03

1986-02-11

Stephan, Steven L.

Dynamic information storage or retrieval

Dynamic mechanism subsystem

Specific detail of storage medium support or motion production

310156, 310191, 369266, H02K 1100, G11B 360, G11B 2504

Patent

active

045702543

ABSTRACT:
A record disc player apparatus has a frame including an entrance for a disc inserted through the entrance to a loading position, the disc being movable from the loading position to a playing position in an operating plane. A drive spindle mounted perpendicularly relative to the operating plane and aligned with the center of a disc in loading position is driven by a drive motor having a wound stator, a permanent magnet rotor, and a drive shaft mounted for movement axially of the spindle from a disc loading position in which the rotor is offset from the stator to a disc playing position in which the rotor is proximate to and rotated by the magnetic field of the stator. The stator of the motor is formed as a printed circuit on a board. A device moves the rotor, drive shaft and spindle from the disc loading position toward the playing position to an intermediate position and the magnetic field of the stator exerts an electromagnetic force on the rotor for moving the rotor from the intermediate position to the disc playing position and for maintaining the rotor in the disc playing position while the disc is rotated.

REFERENCES:
patent: 3972535 (1976-08-01), Bleiman
patent: 4063286 (1977-12-01), Takahara et al.
patent: 4324994 (1982-04-01), Hager
patent: 4499573 (1985-02-01), Morinaga

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