Panasonic Corporation

Yasuhiro Inoue

Yuichi Yoshikawa

Hiroaki Kawasaki

Yasuo Kunishige

Koji Kadowaki

Atsuyoshi Koshiba

A statoris provided with a plurality of magnetic poleson the outer circumference thereof, and is configured from a plurality of layers of plate-shaped members. A rotoris rotatably disposed around the stator. The inner circumferential face of the rotor is provided with a magnet. The outer circumferential ends of the magnetic poles of the stator are provided with an extended portion that is bent such that at least one plate-shaped member, including an outermost layer, of the plurality of plate-shaped members is substantially parallel to the magnet. When the inner diameter of a bent portion of a plate-shaped member that is the closest to the magnet of the at least one plate-shaped member constituting the extended portion is taken as R, and the thickness of the closest plate-shaped member is taken as T, R&#x3c;Tis satisfied. Accordingly, it is possible to improve the driving efficiency of an outer rotor-type motor.

Motor and electronic apparatus using the same

The motor comprises a stator, a rotor, and magnets. The stator has a plurality of magnetic poles circumferentially arranged at first spaced intervals. The rotor is rotatably arranged in a position opposing to the stator. The magnets are arranged at second spaced intervals circumferentially on a surface of the rotor. The stator is formed by laminating plate materials, and a plurality of laminated plate materials at least including outermost layers of a laminated body thereof are bent in a direction substantially parallel to the magnet in order to form extended portions. And, when a magnet opposed area of pole tip portion being closest to a magnet including the extended portion is S, and a sectional area of magnetic pole is A, then area ratio (S/A) fulfills the relation of 4.8&#x3e;(S/A).

Growing community of inventors

Tottori, Japan

Yasuhiro Inoue