Patent ID: 8325967

Claim:
A speaker apparatus, comprising: a frame member having a shape rising outward from a bottom portion; a magnetic circuit including a recessed first yoke having a plate portion and a circumferential wall portion surrounding the plate portion, a magnet disposed inside the first yoke, and a second yoke disposed such that the second yoke and the plate portion of the first yoke sandwich the magnet and an annular magnetic gap is formed between the second yoke and the circumferential wall portion; a supporting member disposed on the bottom portion of the frame member for securing and supporting the magnetic circuit at an opposite circumferential end portion of the circumferential wall portion of the first yoke relative to the plate portion; a voice coil unit disposed inside the magnetic gap in the magnetic circuit; a coupling member disposed outward of the circumferential wall portion of the first yoke; and a diaphragm having its outer circumferential end portion coupled to the frame member and its inner circumferential end portion coupled to the coupling member, wherein the voice coil unit and the coupling member are joined by a joint member that extends in a direction transverse to the circumferential wall portion of the first yoke, and an opening is formed at a predetermined location in each of the circumferential wall portion of the first yoke and the supporting member for securing and supporting the magnetic circuit, the opening including an area where the joint member joining the voice coil unit and the coupling member moves in correspondence with movement of the voice coil unit.