LOUDSPEAKER AND MOBILE DEVICE INCORPORATING SAME

摘要

A loudspeaker includes a diaphragm, a voice coil body, and a magnetic circuit. The diaphragm has a first side, which is the surface of a recess defined by a thin part and a thick part formed around the thin part. The voice coil body includes a bobbin and a voice coil. The bobbin has a first end connected to the thin part on the first side of the diaphragm and a second end opposite to the first end. The magnetic circuit has an inner part, an outer part, and a magnetic gap. Part of the magnetic circuit including the first side of the inner part is located from the second end of the bobbin into the bobbin, and the first side of the inner part and the first side of the outer part are located in the recess so that the voice coil is located in the magnetic gap.

主权项

1. A loudspeaker comprising:
a frame having a hollow; a diaphragm located in the hollow of the frame and having:
a first side as a surface of a recess defined by a thin part and a thick part formed around the thin part; anda second side opposite to the first side; a first edge connecting an outer peripheral end of the diaphragm and the frame; a second edge connecting the outer peripheral end of the diaphragm and the frame, the second edge being opposite to the first edge with respect to a center in a thickness direction of the thick part; a voice coil body including:
a cylindrical bobbin having a first end connected to the thin part on the first side of the diaphragm and a second end opposite to the first end; anda voice coil wound around at least part of the bobbin; and a magnetic circuit including:
an inner part; andan outer part formed around the inner part with a magnetic gap therebetween, wherein part of the magnetic circuit including a first side of the inner part is located from the second end of the bobbin into the bobbin, and the first side of the inner part and a first side of the outer part are located in the recess so that the voice coil is located in the magnetic gap.