ELECTROMAGNETIC TRANSDUCER

摘要

PROBLEM TO BE SOLVED: To obtain an electromagnetic transducer which suppresses abnormal noise caused by divided vibration of vibrating membranes. SOLUTION: The electromagnetic transducer includes: permanent magnets which are alternately arranged at different magnetic poles at predetermined intervals; the vibrating membranes which are arranged opposite to the permanent magnets, in which conductor coils in the meandering shapes are formed on the thin-film like resin surfaces, and which are electromagnetically coupled to the permanent magnets by being conducted to the conductor coils to vibrate in the thickness direction; and frames which support the permanent magnets and the vibrating membranes so as to cover them, wherein the vibrating membranes are sandwiched and supported by resin objects provided at positions for dividing the surfaces. COPYRIGHT: (C)2010,JPO&INPIT