| 摘要 |
PROBLEM TO BE SOLVED: To provide a vibrator of a structure having less parts count and no electric/mechanical contact, wherein a constant driving condition is held for a long period of time without being affected by contact noises or contact life, and start-up to a steady state can be rapidly attained. SOLUTION: The vibrator includes a spring member, one part of which is fixed to a housing. A yoke and a magnet are fixed to the other part of the spring member. A pole piece is fixed in the housing and a coil is made by winding thereon so as to allow a magnetic action to work between the yoke and the pole. Magnetic attraction and repulsion are generated between the yoke and the pole piece by applying electric signals on the coil from a terminal placed in the housing. Thus, vibration is caused between the magnet and yoke and the spring member. COPYRIGHT: (C)2004,JPO&NCIPI
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