Induction speaker without leads and voice coil

Details Induction speaker without leads and voice coil Induction speaker without leads and voice coil

H - Electricity

04

R

349/70

H04R 9/04 (2006.01) H04R 1/34 (2006.01) H04R 9/02 (2006.01)

Patent

CA 1313254

ABSTRACT OF THE DISCLOSURE A speaker comprises: a diaphragm consisting of a vibrating portion and an annular conductive portion; a current feeding coil which is arranged so as to face the conductive portion with a predetermined magnetic gap; and a magnetic circuit consisting of a top plate, a magnet and a yoke plate to which the current feeding coil is attached, and the diaphragm is formed so that an electric resistance of the conductive portion is lower than an electric resistance of the vibrating portion.

597500

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