Patent ID: 7936896

Claim:
A speaker apparatus comprising: a driving member and a vibrating plate which are coaxially disposed along a direction of driving a magnetic circuit; a frame including: a bottom plate portion holding the magnetic circuit; and a peripheral wall portion holding the vibrating plate and the driving member, wherein: the vibrating plate and the driving member are fixed to the peripheral wall portion of the frame at an outer peripheral portion thereof; an inner peripheral portion of the vibrating plate is bonded to the driving member, and an inner peripheral portion of the driving member is fixed to a voice coil bobbin; a space surrounded by the vibrating plate and the drive member and the frame is hermetically closed; a vibrating system is supported through the voice coil bobbin by a spring performance of a gas inside of the space; the bottom plate portion and the peripheral wall portion are connected by a plurality of connecting portions, each of which has a plate shape, arranged spirally; and the plurality of connecting portions are disposed so that interspaces between each of the plurality of connecting portions define openings the plurality of connecting portions are configured to flow air due to a vibration of the vibrating plate along the inclined face thereof.