Patent ID: 7574013

Claim:
A speaker, comprising: a frame including a frame bottom and a convex portion extending upwardly from said frame bottom, said convex portion being open at a top end to form a through-hole in said frame; a magnetic circuit having a magnetic gap, said magnetic circuit being disposed inside of said frame; a voice coil body disposed movably in said magnetic gap; and a diaphragm having an inner periphery edge and an outer periphery edge, said inner periphery edge being coupled to said voice coil body and said outer periphery edge being coupled to said frame, wherein said magnetic circuit includes a magnet and a yoke supporting said magnet, said yoke having a sidewall portion and a flange portion extending radially outward from said sidewall portion, said sidewall portion of said yoke contacting said convex portion of said frame and said flange portion of said yoke contacting said frame bottom of said frame so as to dissipate heat from said magnetic circuit to said frame.