The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 27, 2007
Filed:
Sep. 13, 2005
Masao Mizumaki, Yokohama, JP;
Masao Mizumaki, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
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.