Patent ID: 8391515

Claim:
A micro-speaker comprising: a frame; a case supported on the frame and cooperatively with the frame defining a chamber therebetween; a diaphragm received in the chamber and attached to the frame; a yoke received in the chamber; a magnet received in the chamber and attached on the top of the yoke; a pole plate received in the chamber and attached to the top of the magnet; a voice coil attached to a bottom of the diaphragm and surrounding the magnet and the pole plate; a printed circuit board mounted on the bottom of the frame; wherein the printed circuit board defines a pair of pads formed on the bottom thereof and electrically connecting with the corresponding terminals of the voice coil to apply electric current to the voice coil, and a pair of conductive points extending from a side of the corresponding pads and each facing to each other, when generated, static electricity will be activated to discharge from the conducting points by the corona discharge.