| 摘要 |
PROBLEM TO BE SOLVED: To manufacture a simple-structured and small-size motor and reduce the manufacturing cost by locating winding arms at different angles around a rotary shaft. SOLUTION: A rotor 12 is composed of coils 13a, 13b wound around two coil winding sections 12a, 12b respectively. One coil winding section 12a is located at a position deviated from the other coil winding section 12b by an angleθ. Because of this structure, the center of gravity of the rotor 12 deviates a little in the deviating direction of the coil winding section 12a from the center of rotation of the rotor 12. When an electric current is properly applied from outside to each of the coils 13, 13b of the rotor 12, the rotor 12 is rotated around a rotary shaft 11 and the entire body of a motor 10 vibrates along with the rotation of the rotor 12 since one coil winding section 12a of the rotor 12 is deviated. As a result, the rotary shaft requires no eccentric balancer and thereby the entire body of the motor 10 can be made small and the manufacturing cost can be decreased since the number of components can be reduced.
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