Patent ID: 7346182
Filing Date: 2008-03-18
Classification: H04R

Abstract:
1. An electroacoustic transducer comprising: a diaphragm having a voice coil attached thereto at the end of the voice coil; a frame for supporting the diaphragm at the periphery thereof; a pair of terminal members supported by the frame, the pair of terminal members having lead wires drawn from the voice coil electrically fixed thereon; a magnetic circuit unit having a cylindrical magnetic gap formed therein, the cylindrical magnetic gap accommodating the other end of the voice coil; and a cover provided with a sound emission hole and disposed so as to cover the diaphragm wherein the voice coil, the diaphragm, the frame and the pair of terminal members constitute a diaphragm subassembly; the cover is a bottomed cylindrical member; and the diaphragm subassembly and the magnetic circuit unit are accommodated in the cover; wherein the frame comprises a substantially ring-shaped diaphragm supporting portion and a terminal member supporting portion projecting outward from the diaphragm supporting portion; the external shape of the magnetic circuit unit is substantially cylindrical and the outer diameter thereof is substantially equal to that of the diaphragm supporting portion; the cover comprises a substantially cylindrical side wall, and the inner diameter thereof is substantially equal to the outer diameter of the diaphragm supporting portion; and the side wall has an opening to allow the terminal member supporting portion to project outward from the side wall.