Patent ID: 6668065
Filing Date: 2003-12-23
Classification: H04R

Abstract:
A bone-conduction transducer comprising:a yoke having a plate-shaped body, at least two extensions arranged at one end of the body in a direction orthogonal to the body and at least two extensions arranged at the other end of the body in a direction orthogonal to the body; a pair of voice coils, one voice coil being disposed at a predetermined interval between the extensions arranged at the one end of the body and the other voice coil being disposed at a predetermined interval between the extensions arranged at the other end of the body; a magnet being disposed between the pair of voice coils but spaced at a predetermined interval from the opposite surfaces of the voice coils, respectively; a plate contacting with one surface of the magnet opposite to other surface of the magnet toward the yoke; and diaphragm arranged at one surface of the plate opposite to other surface of the plate contacting with the magnet, wherein external signals generated in an interaction between the pair of voice coils and the extensions formed at the one end and the other end of the yoke create a magnetic change, which causes magnetic density gaps to be formed in an interaction between the diaphragm and the extensions formed at the one end and the other end of the yoke through the magnet, thereby allowing a user to sense the external signals through vibrations transmitted to the diaphragm.