| 摘要 |
PROBLEM TO BE SOLVED: To solve the lowering of vibration of a vibration exciter caused by insufficient follow of the elongation of a coil spring to the movement of a vibrating magnet or the like when the compliance is the coil spring in the vibration exciter constituted of a movable magnet type electric mechanical vibration converter. SOLUTION: The vibration exciter has such a structure that the end part 5a, situated a the magnet side, of the coil spring is fixed to the magnet 3 or a yoke 4 so as to prevent the separation of the coil spring 5 from the magnet system.
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