LOUDSPEAKER AND ELECTRONIC APPARATUS USING THE LOUDSPEAKER

摘要

A loudspeaker includes two first magnetic portions arranged in parallel and a second magnetic portion disposed between the two first magnetic portions on a bottom plate. An annular top plate is provided to the two first magnetic portions and disposed in such a manner as to form a magnetic gap with respect to the second magnetic portion. The first magnetic portions and the second magnetic portion are magnetized in the opposite directions in a direction in which the bottom plate, the first magnetic portions and the top plate are stacked. The top plate includes two main bodies provided to the two first magnetic portions and two bending portions connecting between two first magnetic portions and bending toward the bottom plate.

主权项

1. A loudspeaker comprising:
a magnetic circuit including
a bottom plate,two first magnetic portions arranged in parallel and coupled to the bottom plate,a second magnetic portion disposed between the two first magnetic portions and coupled to the bottom plate, andan annular first top plate provided to the two first magnetic portions at an opposite side to the bottom plate and disposed in such a manner as to form a magnetic gap with respect to the second magnetic portion; a frame supporting the magnetic circuit; a diaphragm supported by the frame; and a voice coil fixed to the diaphragm and inserted into the magnetic gap of the magnetic circuit, wherein the two first magnetic portions and the second magnetic portion are magnetized in opposite directions to each other in a first direction in which the bottom plate, the first magnetic portions, and the first top plate are stacked, and the first top plate includes two main bodies each of which is placed on each of the first magnetic portions, and two bending portions connecting between the two first magnetic portions and bending toward the bottom plate from the main bodies.