Micro-speaker
AssigneesAac Acoustic Technologies (Shenzhen) Co., Ltd., AAC Technologies Pte. Ltd.
InventorsLi-Liang Lu, Wen-Tao Jiang
Life of this patent
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Abstract
A speaker includes a case, a dome, a diaphragm, a first voice coil, a second voice coil, a first pole plate, a second pole plate, a first magnet, a second magnet and a yoke. The case is supported on the frame to form a receiving room therebetween. The yoke includes a bottom portion and a side portion perpendicularly extending upward from the center of the bottom portion. A first magnetic gap is formed between the inner wall of the side portion and the outer wall of the magnet for receiving the first voice coil, and a second magnetic gap is formed between the outer wall of the side portion and the inner wall of the second magnet for receiving the second voice coil.
Claims10
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.
Dependencies are inferred from the claim text.