Electromechanical-electroacoustic transducer with low thickness and high travel range and relevant manufacturing method

摘要

An electroacoustic transducer has a ring-shaped magnetic assembly that generates a magnetic field, an elastic suspension connected to the magnetic assembly, a support connected to the elastic suspension and supporting a coil adapted to move in the magnetic field generated by the magnetic assembly, and an acoustic membrane connected to the support of the coil in order to vibrate and emit a sound. The magnetic assembly has a thin housing and support structure made of non-magnetic material, and a plurality of magnets with magnetic axis (A) and axial anisotropy, said magnets being disposed side by side, inside said thin housing and support structure that acts as bearing structure for the transducer and as containment structure for the magnets.

主权项

1. An electroacoustic transducer comprising:
a ring-shaped magnetic assembly that generates a magnetic field; a coil disposed in the magnetic field generated by the magnetic assembly such that the coil can move with respect to the magnetic assembly and vice versa; an acoustic membrane connected to the coil or to the magnetic assembly in order to vibrate and emit a sound; and at least one elastic suspension connecting the acoustic membrane to the magnetic assembly or to the coil to permit the vibration of the acoustic membrane; characterized in that said magnetic assembly comprises:
a housing and support structure with annular shape, made of non-ferromagnetic material; anda plurality of magnets having a magnetic axis and axial anisotropy; said magnets being disposed side by side, inside said support structure and each magnet having magnetic flux lines that are mutually parallel and parallel to the magnetic axis of the magnet;wherein said housing and support structure of the magnetic assembly acts as bearing structure for the transducer and as containment structure for the magnets.