VIBRATION BODY DRIVEN IN AXIAL DIRECTION

摘要

PROBLEM TO BE SOLVED: To constitute a small-type and high performance vibration body for portable use. SOLUTION: In the vibration body 10 to be driven in the axial direction, a cylindrical driving coil 12 is fixed in one end of a cylindrical frame 11, and the magnetic poles of a pair of cylindrical 1st permanent magnet and 2nd permanent magnet magnetized in the axial direction hold a cylindrical pole piece of a magnetic material for driving use in-between in the center part of a cup- formed yoke 21 magnetically coupled with the driving coil 12 via an air gap to fix the pole piece in cantilever so that the same polarities face each other. The body 10 is constituted so that a driver 20 with a weight 23 loaded is made to vibrate in the axial direction at 100-160 Hz by a pair of coil springs 23, 24 arranged at both ends of the frame 11. COPYRIGHT: (C)2003,JPO