Patent ID: 6229902
Filing Date: 2001-05-08
Classification: H04R

Abstract:
A loudspeaker comprising:a motor including a top plate having an upper surface, and a movable voice coil;a frame including an upper end, and a lower end formed with a bottom plate having an inner edge and an outer edge spaced from said inner edge;a surround connected to said upper end of said frame and a diaphragm connected between said surround and said voice coil;a lower suspension connected at one end to said voice coil, and at the other end to said frame at a location between said upper and lower ends of said frame, a cavity being formed in the area between said lower suspension and said bottom plate of said frame;cooling structure including a number of spaced vanes located between said bottom plate of said frame and said upper surface of said top plate of said motor, adjacent vanes forming passages therebetween which are connected to said cavity by a number of apertures formed along said inner edge of said bottom plate, said passages and said apertures being positioned to direct a flow of air in and out of said cavity, in response to movement of said voice coil, along a flow path formed between said bottom plate of said frame and said upper surface of said top plate of said motor, said flow of air being directed along said flow path in thermal communication with said top plate and said voice coil of said motor.