Patent ID: 7801324

Claim:
A speaker apparatus comprising: a dome type diaphragm having an elliptical shape or a track shape; an edge damper integrally formed with an outer periphery of the dome type diaphragm, the edge damper having an elliptical shape or a track shape; and a frame supporting an outer periphery of the edge damper; wherein a diameter of the edge damper reaches a minimum at a minor axis and the diameter reaches a maximum at a main axis; wherein a plurality of first reinforcing ribs, each of which is formed by a recess and projection structure and is extended to an outer periphery of the edge damper, are formed on an area near the main axis of the edge damper; wherein a plurality of second reinforcing ribs, each of which is formed by a recess and projection structure, are formed on an area near the minor axis of the edge damper; and wherein lengths of the second reinforcing ribs are smaller than lengths of the first reinforcing ribs.