Motor provided with chucking device and disk driving device...

Details Motor provided with chucking device and disk driving device... Motor provided with chucking device and disk driving device...

2008-10-16

2011-12-20

Tran, Michael (Department: 2827)

Dynamic optical information storage or retrieval

Dynamic mechanism optical subsystem

Optical storage medium support

C720S712000

Reexamination Certificate

active

08082561

ABSTRACT:
A motor includes a rotating body including a magnet, and a fixed body including a stator. The stator includes a stator core having an annular core back portion with an upper and a lower surface, and a plurality of circumferentially spaced-apart tooth portions extending from the core back portion in a direction away from the rotational axis, and a plurality of coils provided by winding a conductive wire around the tooth portions of the stator core with multiple turns. The rotor holder is arranged axially above the stator to cover the stator. Further, an annular or arc-shaped attracting magnet arranged to attract the rotor holder toward the stator is arranged radially inwardly of the core back portion, the attracting magnet having an upper surface axially facing toward the rotor holder, and a lower surface arranged axially below the upper surface of the core back portion of the stator core.

REFERENCES:
patent: 6445674 (2002-09-01), Morita
patent: 2004/0114497 (2004-06-01), Lee et al.
patent: 2007/0133123 (2007-06-01), Ichizaki
patent: 2007/0278880 (2007-12-01), Wada et al.
patent: 05-023782 (1993-03-01), None
patent: 2005-253239 (2005-09-01), None
patent: 10-0396396 (2003-09-01), None
patent: 10-2003-0094639 (2003-12-01), None
patent: 10-0474139 (2005-03-01), None
patent: 10-0576863 (2006-05-01), None
patent: 10-0637880 (2006-10-01), None

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