Patent ID: 6487297
Filing Date: 2002-11-26
Classification: H04R

Abstract:
A loudspeaker comprising:a cylindrical sound case provided with a plurality of radial ribs thereby dividing interior of said cylindrical sound case into a plurality of chambers and a common circular space at a central portion and therefore forming a plurality of resonance chambers; a sound coil assembly including cylindrical member which is open at one side and formed with a curved surface at another, said curved surface having a center through hole, said cylindrical member being dimensioned so that said cylindrical member will be tightly engaged with said ribs when fitted into said sound case thus forming a plurality of resonance chambers, a collar having a tubular reel at one end and a curved diaphragm at another end being arranged inside said cylindrical member; and a magnet assembly including a circular iron member having a central recess in which is fitted a magnet and a magnetism permeable disc.