Patent ID: 6668067
Filing Date: 2003-12-23
Classification: H04R,H05K

Abstract:
An electroacoustic transducer, comprising:a diaphragm made of magnetic material; an electromagnetic coil for supplying an oscillating magnetic field to said diaphragm; a housing member formed of an upper housing and a lower housing, for housing said diaphragm and said electromagnetic coil; coil shaped spring terminals which are in contact with an external circuit board to attain an electric connection; terminal blocks for accommodating said spring terminals; and terminal accommodating portions, provided in said terminal blocks, which are opened in a bottom face of said housing member for accommodating said spring terminals, respectively; wherein lead wires of said electromagnetic coil are directly connected to said spring terminals, wherein said terminal accommodating portions are sealed by a connecting process, wherein a space is formed around the terminal blocks which communicates with a back space formed in back of said diaphragm and around said electromagnetic coil so that said lead wires are connected to said spring terminals in the space that communicates with the back space, said upper and lower housings are welded together, to form the housing member, so as to maintain an air tightness of the back space, and wherein an inner face of the housing member is sealed by weld beats formed by the welding of said upper and lower housings.