Patent ID: 6744904
Filing Date: 2004-06-01
Classification: B06B,G08B,H02K,H04R

Abstract:
A multifunction acoustic device comprising:a cylindrical frame having an axis; an annular stator having magnetic poles and provided in a side wall of the cylindrical frame on a plane perpendicular to the axis of the frame; a rotor provided in a space within the stator and rotatably supported by a rotating shaft along the axis, said rotor having magnetic poles in a facing relation to the magnetic poles of the stator along the plane of the stator perpendicular to the axis of the frame; at least one coil mounted on the stator for producing magnetic fluxes between the magnetic poles of the rotor and the magnetic poles of the stator for rotating the rotor; a speaker vibrating plate adjacent to the stator and supported in the frame; a voice coil secured to the speaker vibrating plate; at least one permanent magnet mounted on the rotor for producing magnetic fluxes for vibrating the vibrating plate and for rotating the rotor.