Patent ID: 6724908
Filing Date: 2004-04-20
Classification: G10K,H04M,H04R,Y10T

Abstract:
A method for producing an electric-mechanical-acoustic converter, said method comprising:positioning a diaphragm and a magnetic circuit such that the diaphragm opposes the magnetic circuit; attaching one end of a voice coil to the diaphragm, and inserting the voice coil into a magnetic gap of the magnetic circuit with a predetermined space; integrating a weight with the magnetic circuit or attaching the weight thereto as a separate component; supporting a moveable portion composed of the magnetic circuit and the weight with at least one suspension; supporting the diaphragm and the suspension in a frame, wherein a space in an elastic deformation range of the suspension between an outer periphery of the movable portion and an inner diameter of the frame is smaller than a space between the magnetic gap and the voice coil; forming on a lead frame and integrally molded therewith, the suspension and a lead terminal through which an electric signal is applied from outside to the voice coil.