Spindle motor structure

Details Spindle motor structure Spindle motor structure

2005-06-28

2005-06-28

Le, Dang (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S051000, C310S090500, C310S156120, C310S156260

Reexamination Certificate

active

06911749

ABSTRACT:
A spindle motor structure includes a rotor, a stator accommodated mainly inside the rotor, and an internal roof magnet located on an inner roof surface of a rotor bell of the rotor. The internal roof magnet further has an inner rim and an outer rim. The inner rim is located projection-wisely within a range of a hollow shaft of the stator. The outer rim is located projection-wisely between an internal peripheral surface of the rotor bell and an inner edge of a coil of the stator. By providing the internal roof magnet inside the rotor bell, a magnetic field to immerse the stator can be generated to damp out possible operational noises and disturbance upon the spindle motor.

REFERENCES:
patent: 3233950 (1966-02-01), Baermann
patent: 3619679 (1971-11-01), Carmichael
patent: 3974406 (1976-08-01), Wehde
patent: 4570093 (1986-02-01), Morii et al.
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patent: 5698915 (1997-12-01), Fukuyama et al.
patent: 5774302 (1998-06-01), Elsaesser et al.
patent: 5834868 (1998-11-01), Yoshikawa et al.
patent: 6291916 (2001-09-01), Huang et al.

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