EXTREMELY SMALL FLAT CORELESS VIBRATING MOTOR WITH ENLARGED VIBRATION

PROBLEM TO BE SOLVED: To obtain an flat coreless vibrating motor which has an extremely small size and a simple constitution and can securely case vibrations similar to a large-sized motor. SOLUTION: A flat coreless vibrating motor is provided with an eccentric rotor 9 which is formed by integrally molding a synthetic resin with an armature coil on one side, a shaft which is passed through the center of the rotor 9, and a housing which rotatably supports the rotor 9. The motor is also provided with magnets 3 which are arranged in part of the housing and supply magnetic fluxes, brushes which are arranged inside the magnets 3 at the portion of the housing, and a commutator 10 which is arranged so that the front ends of the brushes may slide on the commutator 10. In the motor, in addition, an auxiliary weight (w) composed of a high-density synthetic resin having a specific gravity of >=7 is attached to the rotor 9 on the side opposite to the magnets 3.