Patent ID: 6895097

Claim:
In a planar speaker comprising: a planar diaphragm ( 2 ); and, an edge member ( 3 ) surrounding said diaphragm ( 2 ), the improvement wherein: said edge member ( 3 ) is constructed of an inner edge piece ( 3 a ) and an outer edge piece ( 3 b ) each of which has a semicircular shape in cross section to provide a convex surface and a concave surface, wherein said edge pieces ( 3 a , 3 b ) are the same in construction, but are inverted in arrangement to have said concave surfaces thereof face to each other to sandwich said diaphragm ( 2 ) between said concave surfaces of said edge pieces ( 3 a , 3 b ); said outer edge piece ( 3 b ) is provided with a plurality of notched holes ( 7 ) which are symmetrically arranged in said outer edge piece ( 3 b ), each of said diaphragm ( 2 ) and said edge member ( 3 ) has a rectangular shape as a whole; said notched hole ( 7 ) is provided in each of corner portions of said outer edge piece ( 3 b ); and a voice coil ( 11 ) disposed in a rear surface of said diaphragm ( 2 ) has a rectangular shape in winding configuration.