Patent ID: 6415037
Filing Date: 2002-07-02
Classification: H04R,Y10T

Abstract:
A speaker device comprising:(a) a frame in a periphery; (b) a diaphragm enclosed by the frame on one side; (c) a resonant space enclosed by the frame and the diaphragm, a through hole on the bottom center of the resonant space, a seat connected to a periphery of the through hole, and a bore passed through the center of the seat and having an inner diameter conforming to that of the through hole for permitting the magnetic member to pass and slide in the through hole and the bore; (d) a magnetic member in the center of the diaphragm, the magnetic member including a slidable sleeve and a permanent magnet having high magnetism, a first end of the sleeve being fixed on the center of the diaphragm, and a second end of the sleeve extending into the bore and the through hole for freely sliding therein; (e) a winding around the center of the frame; and (f) wherein the winding is excited to generate an electromagnetic effect in the center when an electric current is flowed therethrough, which in turn generates a continuous attraction-repulsion effect in the magnetic member, thereby vertically sliding the magnetic member to cause the diaphragm to generate sound.