Patent ID: 7957551
Filing Date: 2011-06-07
Classification: H04R

Abstract:
1. A loudspeaker comprising: a magnetic circuit having a magnetic gap; a frame made of resin and having the magnetic circuit joined to a bottom surface of the frame; and a diaphragm joined to a voice coil fitted into the magnetic gap in a center thereof, and to a periphery of the frame along an outer periphery thereof, wherein the magnetic circuit includes a cylindrical socket-shaped yoke, a magnet disposed in the yoke, and a top plate disposed on the magnet; tongue-shaped flanges are disposed at a substantially equidistant spacing in three positions to partially protrude in an outer circumferential direction from a top end face of the yoke so that a total area of these tongue-shaped flanges in the three positions does not exceed a half of a total area corresponding to a flange part without the flanges; and the frame includes thereon engaging parts each for receiving a corresponding one of the tongue-shaped flanges provided in the yoke while the top end face of the yoke is in contact with the bottom surface of the frame.