Stepping motor

Details Stepping motor Stepping motor

2007-02-27

2007-02-27

Le, Dang (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S090000

Reexamination Certificate

active

11225538

ABSTRACT:
A small-sized and low-cost stepping motor includes a stator made of a soft magnetic material integrally having first and second outer magnetic poles, a first coil wound around a first bobbin externally fitted to the first outer magnetic pole, a second coil wound around a second bobbin externally fitted to the second outer magnetic pole, and a rotor part made of a soft magnetic material having a magnet fixed around a first column part by interference fit. The rotor part is rotatably supported by a first shaft part of a cover in a hole of the rotor part. An urging member made of a nonmagnetic material is rotatably fitted into the hole of the rotor part, and a compression coil spring urging the rotor part in the axial direction together with the urging member is disposed in the hole.

REFERENCES:
patent: 1896265 (1933-02-01), Weichsel
patent: 5264747 (1993-11-01), Kawamura
patent: 5384506 (1995-01-01), Aoshima
patent: 5831356 (1998-11-01), Aoshima
patent: 5854526 (1998-12-01), Sakamoto
patent: 6255749 (2001-07-01), Aoshima
patent: 6979918 (2005-12-01), Aoshima et al.
patent: 9-331666 (1997-12-01), None
patent: 10-229670 (1998-08-01), None
patent: 2000-287434 (2000-10-01), None

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