Micro-speaker

摘要

A micro-speaker includes a yoke, a magnet assembly attached to the yoke, a voice coil, and a diaphragm connected with the voice coil. The yoke defines a bottom wall, and a number of sidewalls extending upwards from the bottom wall. The magnet assembly includes a main magnet positioned on the bottom wall, and a number of secondary magnets positioned on tops of the sidewalls.

主权项

1. A micro-speaker comprising:
a yoke defining a bottom wall, a plurality of sidewalls extending upwards from the bottom wall, and a plurality of fringes extending outwards from top faces of the sidewalls along directions parallel to the bottom wall; a magnet assembly attached to the yoke, including a main magnet positioned on the bottom wall and a plurality of secondary magnets positioned on tops of the fringes; magnetic gaps formed between the magnet assembly and the yoke, including a first magnetic gap formed between an outer surface of the main magnet and an inner surface of the sidewalls of the yoke and a second magnetic gap formed between the main magnet and the secondary magnets, the first magnet gap being communicated with the second magnetic gap; a voice coil partially received in a combination of the first and second magnetic gaps; a diaphragm connected with the voice coil; a frame including an upper portion and a lower portion together forming a receiving space for receiving the yoke and the magnet assembly; wherein the lower portion includes at least a slot disposed at an inner face thereof for receiving the secondary magnet.