| 摘要 |
A miniature speaker is disclosed. The miniature speaker includes a frame providing a receiving space, a magnetic circuit positioned in the receiving space and a vibration unit including a diaphragm and a voice coil driving the diaphragm. The magnetic circuit includes a main magnet positioned on a center of the lower plate, a pair of auxiliary magnets positioned spaced from the main magnet for forming a magnetic gap, a pole plate attaching to a top surface of the main magnet, and an upper plate. The upper plate includes a pair of main segments attached to top surfaces of the auxiliary magnets, and a pair of connecting beams connecting with the main segments and located between the two auxiliary magnets. The magnets are prevent from being attracted to each other by virtue of the upper plate. |
| 主权项 |
1. A miniature speaker, comprising:
a frame providing a receiving space; a magnetic circuit positioned in the receiving space, the magnetic circuit comprising a lower plate, a main magnet positioned on a center of the lower plate, a pair of auxiliary magnets positioned spaced from the main magnet for forming a magnetic gap, a pole plate attaching to a top surface of the main magnet, and an upper plate, the upper plate including a pair of main segments attached to a top surfaces of the auxiliary magnets and a pair of connecting beams connecting with the main segments by a butting portion and located between the two auxiliary magnets, the butting portion and the connecting beam cooperatively forming an extra space; and a vibration unit including a diaphragm and a voice coil driving the diaphragm, one end of the voice coil suspending in the magnetic gap, the voice coil further including a lead wire partially received the extra space for avoiding touched the upper plate. |
