An ultra-thin loudspeaker, comprising a basin frame, the basin frame comprising an upper opening and a lower opening connected up and down, and is characterized in that:

A U iron enters the bottom of the basin frame from the upper opening, a magnet is arranged on the inner bottom surface of the U iron, a washer is arranged on the magnet, and the lower part of a voice coil winds the washer and the upper part of the magnet Wrap, a bomb is inserted into the basin frame from the upper opening and sleeved on the upper part of the voice coil;

A diaphragm enters the basin frame from the upper opening and covers the upper opening. The beneficial effects of the utility model are:

Put the U iron into the basin frame from the upper opening of the basin frame, and cover the lower opening of the basin frame by means of concave-convex correspondence, which can reduce the structural thickness of the speaker;

The special shape of the elastic wave, including the annular center part at the center, the edge part at the periphery, and the annular elastic wave part between the center and the periphery, can make the loudspeaker have good low frequency extensibility.