A micro-speaker includes a case having a cavity and a receiving hole, a magnetic circuit unit and a vibrating unit with a voice coil received in the cavity, a pair of needle seats embedded in the case for electrically connecting with the voice coil, a pair of pogo-pins arranged in the receiving hole for electrically connecting with the pair of needle seats. Each of the pogo-pins has a barrel unit, a first protrusion and a second protrusion extending from an outer surface of the barrel unit, at least one plunger extending from the barrel unit and projecting out of the receiving hole, a receiving space formed between the first protrusion and the second protrusion. A third protrusion extends from an inner surface of the receiving hole and accommodated in the receiving space for fixing the pogo-pin in the corresponding receiving hole.
1. A micro-speaker comprising:
a case defining a receiving cavity, and a receiving hole;
a magnetic circuit unit and a vibrating unit with a voice coil received in the cavity;
a pair of needle seats embedded in the case electrically connected with the voice coil;
a pair of pins respectively arranged in the receiving holes for electrically connecting with the pair of needle seats;
each of the pins including a barrel unit, a first plunger and a second plunger respectively extending from two ends of the barrel unit, the first plunger projecting out of the receiving hole, the second plunger elastically contacting the needle seat; and wherein
the barrel unit includes a first protrusion and a second protrusion extending from an outer surface of the barrel unit, a receiving space formed between the first protrusion and the second protrusion;
a third protrusion extends from an inner surface of the receiving hole and forms a circular aperture corresponding to the configuration of the barrel unit of the pins for fixing the pins;
the first protrusion and the second protrusion are torus-shaped in cross section, a diameter of the first protrusion and a diameter of the second protrusion are greater than a diameter of the aperture of the third protrusion.
2. The micro-speaker as claimed in claim 1 , wherein a thickness of the third protrusion is smaller than or equal to a thickness of the receiving space along a direction parallel to the length of the barrel unit.
3. The micro-speaker as claimed in claim 2 , wherein the case defines a frame and a rear cover engaged with the frame.
4. The micro-speaker as claimed in claim 3 , wherein the rear cover further includes a holder, and the receiving hole is provided in the holder.
5. The micro-speaker as claimed in claim 4 , wherein the pair of needle seats is embedded in the frame.