Micro-speaker

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 pogo-pins respectively arranged in the receiving holes for electrically connecting with the pair of needle seats;
• each of the pogo-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;
• the barrel unit including 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 extending from an inner surface of the receiving hole and accommodated in the receiving space for fixing the corresponding pogo-pin in the receiving hole.