Speaker box and mobile terminal

A mobile terminal, comprising a housing having an accommodating cavity and a speaker box received in the accommodating cavity, a heat stake being formed on the housing, and the speaker box being positioned through cooperation between the positioning portion and the heat stake and being fixed to the housing after hot melting of the heat stake, wherein the speaker box comprises a shell having a receiving space and a speaker unit received in the receiving space and having a diaphragm, a front sound cavity is formed between the shell and the speaker unit, and the shell is provided with a sound output hole communicated with the front sound cavity;

• wherein the shell comprises a bottom shell and a metal top plate covering the bottom shell, the bottom shell and the metal top plate together define the receiving space, the bottom shell comprises a bottom wall opposite to and spaced from the metal top plate and a sidewall bending and extending from a periphery of the bottom wall toward the metal top plate, the metal top plate comprises a main body covering one end of the sidewall away from the bottom wall and a connector extending outwards from the main body, a positioning portion is provided in the connector, the housing extends toward the connector to form the heat stake supporting and fixing the connector, the heat stake matches the positioning portion and passes through the positioning portion, and the connector is fixed to the housing after hot melting of the heat stake;
• wherein the speaker box further comprising a fixing holder, wherein the fixing holder comprises an annular frame received in the receiving space and configured to fix the speaker unit, and a sound guide structure protruding from one side of the annular frame and extending out of the sidewall, the annular frame, the diaphragm and the metal top plate together define the front sound cavity, a sound guide through hole communicated with the front sound cavity is formed in the sound guide structure, one end of the sound guide structure away from the annular frame is provided with the sound output hole, and the sound output hole is communicated with the front sound cavity through the sound guide through hole.