Patent ID: 8363880

Claim:
A speaker comprising: a diaphragm that is a long flat plate; an edge disposed at an end of said diaphragm viewed in a longer-side direction of said speaker, said edge supporting said diaphragm to allow said diaphragm to vibrate; at least one voice coil bobbin in a shape of a substantially square pillar having a height that is equal to or more than twice as a vibrational amplitude of said diaphragm, said at least one voice coil bobbin including an opening having a periphery connected directly to said diaphragm, and said at least one voice coil bobbin supporting said diaphragm to transmit vibration to said diaphragm; a voice coil wound around an outer periphery of said at least one voice coil bobbin substantially at center in a height direction of said at least one voice coil bobbin; and a magnetic circuit arranged to drive said voice coil.