RECIPROCATING VIBRATION GENERATOR
First Claim
1. A reciprocating vibration generator provided in a case with an elastic member for supporting a ring-shaped weight having a ring-shaped permanent magnet at its inner circumference side to be able to reciprocate in the vertical direction and a cylindrical excitation coil passing through the inside of the ring-shaped permanent magnet in the vertical direction and generating a reciprocating vibrating magnetic field,wherein the ring-shaped permanent magnet is magnetized in a direction spanning that inner circumferential surface and outer circumferential surface, the inner circumferential surface and top and bottom end faces of the ring-shaped permanent magnet are magnetically covered by magnetic fluid, and a gap between the inner circumferential surface and the outer circumferential surface of the excitation coil is filled with magnetic fluid.
2 Assignments
0 Petitions
Accused Products
Abstract
A reciprocating vibration generator of a structure enabling force of a reciprocating vibrating body striking a coil to be absorbed by magnetic fluid even if an external impact force is applied, that is, a reciprocating vibration generator provided in a case body 100 with an upper plate spring 40 and a lower plate spring 50 for supporting a ring-shaped weight 20 having a ring-shaped permanent magnet 30 comprised of a combination of semi-ring-shaped permanent magnets 30R, 30L at its inner circumference side so as to be able to reciprocally vibrate in a vertical direction and a cylindrical excitation coil 60 passing through the inside of the ring-shaped permanent magnet 30 in the vertical direction and generating a reciprocating vibrating magnetic field, wherein the semi-ring-shaped permanent magnets 30R, 30L are magnetized in a direction spanning the inner circumferential surface and outer circumferential surface, the inner circumferential surface and top and bottom end faces of the semi-ring-shaped permanent magnet 30R, 30L are covered by magnetic fluid F, and a gap between the inner circumferential surface and the outer circumferential surface of the excitation coil 60 is filled with magnetic fluid F.
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Citations
5 Claims
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1. A reciprocating vibration generator provided in a case with an elastic member for supporting a ring-shaped weight having a ring-shaped permanent magnet at its inner circumference side to be able to reciprocate in the vertical direction and a cylindrical excitation coil passing through the inside of the ring-shaped permanent magnet in the vertical direction and generating a reciprocating vibrating magnetic field,
wherein the ring-shaped permanent magnet is magnetized in a direction spanning that inner circumferential surface and outer circumferential surface, the inner circumferential surface and top and bottom end faces of the ring-shaped permanent magnet are magnetically covered by magnetic fluid, and a gap between the inner circumferential surface and the outer circumferential surface of the excitation coil is filled with magnetic fluid.
Specification