Flat type stepping motor

Details Flat type stepping motor Flat type stepping motor

1987-06-24

1988-03-22

Salce, Patrick R.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 49R, 310 90, 310156, H02K 504

Patent

active

047331208

ABSTRACT:
A flat type stepping motor used mainly for driving an ultra small size floppy disk is disclosed. According to the invention, a rotor yoke holder holding a pair of yokes on the rotor unit is secured to the end of a rotary shaft, while a stator unit is disposed radially outward of the rotor unit within the interior of the motor casing. The end of the rotor shaft is carried by a bearing unit, the end of which is introduced into the inside of the rotor yoke holder. The bearing unit and the rotor yoke holder are overlapped with each other in the axial direction of the stepping motor, to conserve axial space.

REFERENCES:
patent: 4429240 (1984-01-01), Kishi
patent: 4581667 (1986-04-01), Gerfast
patent: 4603271 (1986-07-01), Maruyama
patent: 4645963 (1987-02-01), Plackner et al.
patent: 4658944 (1987-04-01), Kogure et al.

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