| 摘要 |
PROBLEM TO BE SOLVED: To provide a vibrator with high energy efficiency to constitute a rotor which transmits rotation of a motor so as to be in a good weight balance during standstill, but so as to be in an unbalance state as it rotates. SOLUTION: This vibrator which generates vibration with the rotation of the motor is provided with a rotation transmitting shaft to which the rotation of the motor is transmitted, a substantially disc-shaped rotating body which rotates to be mounted on the rotation transmitting shaft, an exciting weight arranged inside the rotating body and capable of moving toward the rotation transmitting shaft, and an elastic body for biasing the weight toward the rotation transmitting shaft. The weight is separated from the rotation transmitting shaft by a centrifugal force generated according to the rotation of the rotating body. The weight for the balance may be fixed near the rotation transmitting shaft of the rotating body. COPYRIGHT: (C)2006,JPO&NCIPI
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