VOICE COIL SUPPORT FOR MOTOR UNIT OF COIL CONVERTER Russian patent published in 2014 - IPC H04R9/04 

FIELD: physics, acoustics.

SUBSTANCE: group of inventions relates to acoustic engineering. A loudspeaker has a housing and a voice coil movement converter which is fixed on the top part of the housing and a retraction means. The voice coil movement converter has a magnetic element, a voice coil frame with a mechanical type of vibrations with natural frequency of the vibrations outside the range of audio frequencies, having a first surface directed towards one end and a second surface directed to towards the other end of the frame along the axis Z of displacement, and outer lateral surface between the first and second surfaces. The frame has a single-block structure made from a single solid piece of porous material which prevents an air stream from linking the first surface and the second surface, at least one winding of the coil wound around the voice coil frame on its outer surface and adapted, during use, to move the voice coil frame along the axis of displacement once current is transmitted through windings of the coil and when the voice coil frame is placed in a magnetic field whose field lines pass between the ends of at least one winding of the coil.

EFFECT: high sound quality.

13 cl, 6 dwg