Loudspeaker

A loudspeaker, comprising:

• a shell, wherein the shell comprises a main shell body and a plurality of inner support bodies, the plurality of inner support bodies are connected to the main shell body, and the plurality of inner support bodies are disposed in a surrounding manner to define an inner support cavity that penetrates in a first direction;
• a vibration structure, wherein the vibration structure is connected to the main shell body;
• a magnetic circuit structure, wherein the magnetic circuit structure is located in the inner support cavity and is sandwiched between the plurality of inner support bodies;
• and
• a voice coil, wherein the voice coil comprises a main voice coil and an auxiliary voice coil, the main voice coil is connected to the vibration structure and is movable in the first direction relative to the magnetic circuit structure, the auxiliary voice coil is disposed around an outer periphery of the main voice coil and connected to the main shell body, and when the main voice coil and the auxiliary voice coil are energized for operation, a direction of an acting force applied to the magnetic circuit structure by the main voice coil is opposite to a direction of an acting force applied to the magnetic circuit structure by the auxiliary voice coil;
• and
• wherein the magnetic circuit structure comprises:
• a yoke, wherein the yoke is sandwiched between the plurality of inner support bodies, the yoke comprises a bottom plate portion and a plurality of support plate portions connected to the bottom plate portion, and the plurality of support plate portions comprises first support plate portions and second support plate portions;
• and
• wherein support plate portions at two ends of the bottom plate portion in a second direction are the first support plate portions, and the first support plate portions are located inside the auxiliary voice coil;
• and
• support plate portions at two ends of the bottom plate portion in a third direction are the second support plate portions, and the second support plate portions are located outside the auxiliary voice coil.