Patent ID: 9338535
Filing Date: 2016-05-10
CPC Classification: H04R

Claim Text:
1. A micro-speaker, comprising: a frame providing a receiving space; a magnetic circuit unit accommodated in the receiving space, the magnetic circuit unit including a first magnetic gap and a second magnetic gap arranged at two opposite sides of the magnetic circuit unit, the magnetic circuit unit further including an aperture; a first vibration unit including a first diaphragm and a first voice coil with an end suspending in the first magnetic gap for driving the first diaphragm; a second vibration unit including a second diaphragm and a second voice coil with an end suspending in the second magnetic gap for driving the second diaphragm; a first volume formed between the first diaphragm and the magnetic circuit unit; a second volume formed between the second diaphragm and the magnetic circuit unit, the second volume being separated by the magnetic circuit unit from the first volume and communicated with the first volume via the aperture; the magnetic circuit unit including a yoke, a first magnet assembly positioned on a first surface of the yoke, and a second magnet assembly positioned on a second surface of the yoke opposed to the first surface; the yoke including a bottom, a plurality of sidewalls extending vertically from the bottom, and a plurality of flanges extending vertically from the sidewalls, the flanges being parallel to the bottom.