Patent ID: 8126179

Claim:
A sound output apparatus comprising: a diaphragm for outputting sound when vibrated, the diaphragm having a hole of a predetermined shape at a side edge; a first plate connected to a bolt, the first plate being attached to one surface of the diaphragm along a substantial length of the side edge having the hole; a second plate having a hole, one surface of the second plate being attached to the other surface of the diaphragm along a substantial length of the side edge having the hole; and a frame to which the diaphragm is fixed, the frame being arranged adjacent to the other surface of the second plate, the frame having a hole, wherein the bolt extends through the hole in the diaphragm, the hole in the second plate, and the hole in the frame, and is secured by a nut, and wherein the diaphragm is fixed to the frame by the bolt and nut being screwed together, while being disposed between the first and second plates.