| 摘要 |
PROBLEM TO BE SOLVED: To provide a vibration motor capable of eliminating the need for an eccentric weight outside the motor and generating vibration while rotating stably without increasing cogging. SOLUTION: The vibration motor includes a rotary shaft, an armature core secured to the rotary shaft and provided with a plurality of salient poles, an armature coil wound around each of the salient poles except at least one salient pole, a commutator piece electrically connected to the armature coil, a frame serving as an outside cover, a plurality of magnets secured to the frame and provided with respective different polarities, and a weight adapted to rotate together with the rotary shaft and disposed eccentrically in an angle range, wherein the weight is incorporated inside the frame and secured to the armature core in such a manner that the weight is inserted in a hollow provided in at least one salient pole having no armature coil. COPYRIGHT: (C)2010,JPO&INPIT
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