Vibrating diaphragm and loudspeaker

A loudspeaker, comprising:

• a bracket;
• a first magnetic circuit system, arranged on the bracket and suitable for forming a magnetic gap region;
• and
• a first vibrating system, comprising a first voice coil and a vibrating diaphragm, wherein the vibrating diaphragm comprises a first diaphragm layer, a first conductive metal layer and a second diaphragm layer which are stacked sequentially;
• the first conductive layer comprises two metal foils;
• each of the metal foils comprises a first conductive part, a second conductive part, and a first supporting part arranged between the first conductive part and the second conductive part;
• and the second diaphragm layer is provided with a plurality of leaks to expose the first conductive part and the second conductive part, the first conductive part and the second conductive part are electrically connected to the first voice coil and an external circuit respectively, the vibrating diaphragm is connected to the bracket, the first conductive part is connected to a lead of the first voice coil, and the first voice coil is arranged in the magnetic gap region formed by the first magnetic circuit system to drive the vibrating diaphragm to vibrate;
• wherein the loudspeaker further comprises a terminal, one end of the terminal is connected to the second conductive part, another end of the terminal is connected to the external circuit, the terminal is set as a U-shaped structure.