Patent ID: 6466682
Filing Date: 2002-10-15
Classification: B06B,H04R

Abstract:
A vibration speaker comprising:a case having a space therein; a vibrating plate having a portion fixed onto the case for generating a sound; a voice coil wound and fixed onto the vibrating plate in a cylindrical shape; a plate having an external end portion fixed onto a lower end portion of the case; a magnetic circuit which includes a magnet seated in a vertical direction, an upper plate and a yoke attached to the magnet for forming a magnetic field, the magnetic circuit including a bottom surface opposed to the plate; a suspension mechanism fixed onto the case for suspending the magnetic circuit; and a magneto-rheological fluid having a predetermined degree of viscosity arranged between the magnetic circuit bottom surface and the plate so as to be capable of contacting both to function as a damping member while the suspension mechanism is displaced in a vertical direction.