MAGNETIC SYSTEM OF MOVING-COIL LOUDSPEAKER Russian patent published in 1994 - IPC

FIELD: radio engineering. SUBSTANCE: magnetic system of a moving-coil loudspeaker uses a magnetic circuit in the form of a sleeve made of soft magnetic material, a flange with a hole that closes it and a pole piece located in the flange hole, as well as a permanent magnet of a hard magnetic material that is made of circular cylinder and a body of rotation made integral with it. The generating line of the body of rotation of the permanent magnet is made in the form of smooth concavity to the axis of the curve magnet. A chamfer in the form of a truncated cone, expanding to the magnetic circuit sleeve bottom, may be made along the circumference of the larger base of the body of rotation. EFFECT: improved quality. 2 cl, 2 dwg