Spindle motor

Details Spindle motor Spindle motor

1991-01-18

1992-11-03

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 67R, 369263, H02K 516

Patent

active

051608669

ABSTRACT:
A spindle motor having a shaft member secured to a fitting member, a rotary member which is rotatable relatively to the shaft member, a rotor magnet fitted to the rotary member in such a manner that the rotor magnet confronts the rotor magnet and a stator, wherein a pair of inner annular grooves are formed in the shaft member, a pair of outer annular grooves are formed in the rotary member and a plurality of ball members are accommodated in ball-accommodating space defined by these annular grooves. A spindle motor having a fitting member having a hollow cylindrical portion, a shaft member which is rotatable relatively to the fitting member, a rotary member secured to the shaft member, a rotor magnet fitted to the rotary member and a stator disposed in such a manner that the stator confronts the rotor magnet, wherein a pair of inner annular grooves are formed in the shaft member, a pair of outer annular grooves are formed in the inner surface of the cylindrical portion and a plurality of ball members are accommodated in a ball-accommodating space defined by these annular grooves.

REFERENCES:
patent: 4858044 (1989-08-01), Gapo
patent: 5045738 (1991-09-01), Hishida et al.
patent: 5057731 (1991-10-01), Hancock
patent: 5061868 (1991-10-01), Iwazaki et al.

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