Core, speaker module, and electronic device

A speaker module, comprising a housing and a core disposed in the housing, wherein the housing is separated by a diaphragm assembly of the core into a front cavity and a rear cavity, a first voice coil set, a second voice coil set, and a magnetic circuit system of the core are located in the rear cavity, a sound output channel is disposed at the housing, and the front cavity is connected to the sound output channel, wherein,

• the core comprises the diaphragm assembly, the first voice coil set, the second voice coil set, and the magnetic circuit system, wherein
• the first voice coil set, the second voice coil set, and the magnetic circuit system are located on a same side of the diaphragm assembly, and the first voice coil set and the second voice coil set are fastened to the diaphragm assembly;
• the magnetic circuit system comprises a magnet assembly, the magnet assembly comprises a first central magnet, a second central magnet, and a side magnet, the first central magnet is spaced apart from the second central magnet, the side magnet is circumferentially disposed around a central magnet set comprising the first central magnet and the second central magnet, a magnetization direction of the second central magnet is the same as a magnetization direction of the first central magnet, and a magnetization direction of the side magnet is opposite to the magnetization direction of the first central magnet,
• wherein the magnetic circuit system further comprises a first magnetically conductive yoke and a second magnetically conductive yoke, wherein the first magnetically conductive yoke comprises an inner magnetically conductive yoke, wherein the inner magnetically conductive yoke comprises a first protruding part that protrudes in a direction close to the second magnetically conductive yoke;
• an inner magnetically conductive part is disposed in a gap between the first central magnet and the second central magnet, a first annular magnetic gap is formed between the side magnet, the inner magnetically conductive part, and the first central magnet, and a second annular magnetic gap is formed between the side magnet, the inner magnetically conductive part, and the second central magnet;
• and
• at least a part of the first voice coil set extends into the first annular magnetic gap, at least a part of the second voice coil set extends into the second annular magnetic gap, and the first voice coil set and the second voice coil set cooperate with the magnetic circuit system to synchronously drive the diaphragm assembly to vibrate.

An electronic device, comprising:

• an external housing, a main board, and a speaker module, wherein the main board and the speaker module are disposed in the external housing, the speaker module is electrically connected to the main board, a sound output hole is provided at the external housing, and a sound output channel is connected to the sound output hole, wherein the speaker module comprises:
• a core comprising a diaphragm assembly, a first voice coil set, a second voice coil set, and a magnetic circuit system, wherein
• the first voice coil set, the second voice coil set, and the magnetic circuit system are located on a same side of the diaphragm assembly, and the first voice coil set and the second voice coil set are fastened to the diaphragm assembly;
• the magnetic circuit system comprises a magnet assembly, the magnet assembly comprises a first central magnet, a second central magnet, and a side magnet, the first central magnet is spaced apart from the second central magnet, the side magnet is circumferentially disposed around a central magnet set comprising the first central magnet and the second central magnet, a magnetization direction of the second central magnet is the same as a magnetization direction of the first central magnet, and a magnetization direction of the side magnet is opposite to the magnetization direction of the first central magnet,
• wherein the magnetic circuit system further comprises a first magnetically conductive yoke and a second magnetically conductive yoke, wherein the first magnetically conductive yoke comprises an inner magnetically conductive yoke, wherein the inner magnetically conductive yoke comprises a first protruding part that protrudes in a direction close to the second magnetically conductive yoke;
• an inner magnetically conductive part is disposed in a gap between the first central magnet and the second central magnet, a first annular magnetic gap is formed between the side magnet, the inner magnetically conductive part, and the first central magnet, and a second annular magnetic gap is formed between the side magnet, the inner magnetically conductive part, and the second central magnet;
• and
• at least a part of the first voice coil set extends into the first annular magnetic gap, at least a part of the second voice coil set extends into the second annular magnetic gap, and the first voice coil set and the second voice coil set cooperate with the magnetic circuit system to synchronously drive the diaphragm assembly to vibrate.