Vibrator motor having nonmagnetic armature cores

摘要

A vibrator motor has a generally sector-shaped eccentric armature rotor that has a nonmagnetic body including core parts, around which armature coils are individually wound. The core parts are disposed at an even pitch angle, but within a 180 DEG angular range, about the rotational axis of the rotor. A rotor body of one embodiment consists of a first part and a second part that includes the core parts and the first part is made of a synthetic resin and the second part is made of a synthetic resin or a nonmagnetic but electrically-conductive metal. A rotor of an additional embodiment has a single-piece body of a synthetic resin that integrally has the core parts.