MOTOR

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PROBLEM TO BE SOLVED : To provide a motor in which lower price and reduction in size can be achieved. SOLUTION : There are disposed magnets 12, in which a pair of the same poles are opposed to each other in an inner peripheral surface of a cylindrical yoke 3 incorporating a rotor 4 therein, and no magnets are disposed in the other pole portions that have opposite poles to the magnets between these magnets and made empty, and the other pole portions are configured as the other pole component 3a by a yoke. Since the number of magnets can be reduced, the cost as a whole can be lowered, even if unit price becomes higher, by using rare-earth magnet for example so that magnetic properties may not be worsened. In particular, the outline of the portion where no magnet of the yoke is deteriorated (parts to serve as other pole portion) can be made thinner than the portion, where magnets are disposed, thus achieving reduction in size. COPYRIGHT : (C)2007, JPO&INPIT