ELECTRODYNAMIC DRIVE FOR FLAT LOUDSPEAKERS Russian patent published in 2021 - IPC H04R9/04 

FIELD: acoustics.

SUBSTANCE: invention relates to acoustics, in particular to flat loudspeakers. The electrodynamic drive for a flat loudspeaker contains a housing in which there are installed: a magnetic system, a cylindrical coil attached to the frame, a sound-emitting membrane attached to the frame of the cylindrical coil, a coil holding system within the magnetic gap and flexible wires for supplying an electrical signal to the coil. In this case, the magnetic system is made in the form of a cylindrical permanent magnet, a ferrite ring, in the center of which the specified cylindrical magnet and washers are installed, fastening them into a single structure; the coil retention system within the magnetic gap consists of two centering washers of different diameters, fixed at some distance from each other, in the form of a concentrically corrugated disk, with an inner hole attached to the coil, and an outer perimeter to the body; and flexible wires supplying an electrical signal to the coil are sewn into one of the centering washers and are soldered at one end to the terminals of the coil, and at the other to the outer contact group.

EFFECT: technical result is to expand the working range of the loudspeaker while reducing the level of the resonant amplitude surge due to the use of centering (coil-retentive) washers.

3 cl, 4 dwg