US Patent 10178481 Sound producing device

A sound producing device comprising: a speaker unit and a housing, wherein the speaker unit comprises a vibration system which comprises a vibrating diaphragm and a voice coil; a front and rear acoustic cavities are formed between the vibrating diaphragm and the housing, respectively; the side surface of the housing is provided with a sound hole communicating with the front acoustic cavity; the vibrating diaphragm comprises a dome portion and a suspension ring portion; the side of the suspension ring portion connected to the dome portion is provided with a dome connecting portion, and the side of the suspension ring portion combined with the housing is provided with a housing bonding portion; and a height difference exists between the housing bonding portion and the dome connecting portion. The present invention increases the size of the sound hole and the speaker unit, thus improving the acoustic performance of a product.