COMPOSITE DYNAMIC HEAD OF LOUD SPEAKER Russian patent published in 2012 - IPC H04R7/16 

FIELD: radio engineering.

SUBSTANCE: dynamic head (22) of a loud speaker suitable for use as a composite head comprises a rigid frame (11, 13, 15, 19, 8) of a loud speaker, to which a permanent magnet (13) is attached. A winding (9) of a voice call is designed for interaction with this magnet by means of electromagnetic forces. The winding is made with the possibility to drive a membrane unit (21) along the axis, and the unit comprises an elastic external section (2), attached with its outer edge (5) to the external part (11) of the loud speaker frame. The membrane unit (21) comprises substantially a rigid main vibrating membrane (4) fixed between the elastic external section (2) and the elastic inner section (3). The inner edge (10) of the membrane is attached to the inner part (8) of the loud speaker frame. The winding (9) of the voice coil is fixed relative to the main vibrating membrane (4) via the frame (6) of the voice coil, arranged as capable of membrane unit (21) displacement.

EFFECT: reduced sound distortions.

16 cl, 5 dwg