To provide a cylindrical vibrator which can have a great amplitude, can avoid the point to make the acceleration of the peak of the amplitude zero, has no problem of damage, can eliminate the problem in impact properties and is made to deal with reflow soldering.
The cylindrical vibrator is provided with two exciting coils (2) which are stored while facing each other on the inside surface in the shorter side direction of a cylindrical case (1) and have surfaces facing each other during energization so as to generate magnetic fields of the same pole, a movable weight (4) which moves back and forth between the exciting coils during energization and is provided with a magnet magnetized in a moving direction as at least a portion thereof, an elastic body (5) which supports the movable weight, a bracket (7) which is disposed in the aperture of the cylindrical case and power feed terminals (7a and 7b) which are disposed at the bracket in order to apply the electric power to the cylindrical exciting coils.
TAKAGI MASAHIRO
SHIMOSEGAWA SATORU
