Patent ID: 6738489
Filing Date: 2004-05-18
Classification: H04R

Abstract:
A vibration speaker comprising:a housing having a hollow cylindrical structure opened at both ends thereof, the housing having at one end thereof a vibrating plate adapted to generate sound and, at the other end thereof, a shield plate adapted to shield the other end of the housing; a yoke centrally arranged in the interior of the housing and fixedly mounted to an inner peripheral surface of the housing by plate springs spaced apart from each other by a desired distance; a magnet attached to an upper end of the yoke to have N and S poles vertically aligned together, the magnet constituting a magnetic circuit; a voice coil having an upper end fixed to the vibrating plate, and a lower end arranged adjacent to the magnet; a vibration coil attached to one surface of the shield plate while facing the magnet; and a damping structure arranged at the inner peripheral surface of the housing and constructed to apply a damping property to the plate springs, thereby reducing a variation in the amplitude of vibration transmitted to the plate springs, wherein the damping structure comprises more than one rubber member composed of a plurality of pieces made of a rubber material, said rubber member serving respective outer peripheral ends of the plate springs.