Speaker

A speaker, comprising:

• a metal holder;
• a magnetic circuit unit mounted on the holder;
• and
• a vibration unit mounted on the holder,
• wherein the vibration unit comprises a first diaphragm fixed to one end of the holder, and the magnetic circuit unit comprises a yoke, a main magnet assembled at a center of the yoke, two auxiliary magnets assembled on the yoke and respectively located on two opposite sides of the main magnet, and a clamp plate assembled on the two auxiliary magnets,
• the clamp plate comprises two long-axis edges opposite to each other, and two short-axis edges opposite to each other, the two long-axis edges and the two short-axis edges are connected end to end to form the clamp plate, the two long-axis edges are respectively attached to surfaces of the two auxiliary magnets,
• the holder comprises two long edges opposite to each other, two short edges opposite to each other, and corner portions, each corner portion connects a long edge and an adjacent short edge,
• each of the two short edges comprises a first surface facing away from the first diaphragm, the two short-axis edges respectively abut against the first surfaces of the two short edges, each of the two short-axis edges comprises a second surface facing away from the main magnet, each of the corner portions comprises a third surface facing away from the first diaphragm, and the first surface is closer to the first diaphragm than the third surface, each end of the short-axis edges laterally abuts against a corresponding corner portion,
• each short edge is provided with a protrusion extending from the first surface in a direction facing away from the first diaphragm, each short-axis edge is provided with an avoiding portion formed by recessing from the second surface in a direction facing away from the adjacent short edge, the protrusion is received in and fixedly connected to the corresponding avoiding portion.