SOUND PRODUCTION DEVICE

WIPO Patent Application WO/2022/000655

A1

The present invention provides a sound production device, comprising a frame, and a vibration system and a magnetic circuit system having a magnetic gap that are separately fixed to the frame. The vibration system comprises a vibrating diaphragm fixed on the frame and a voice coil inserted into the magnetic gap to drive the vibrating diaphragm to vibrate and produce sound. The vibrating diaphragm comprises an upper voice diaphragm and a dome. The upper voice diaphragm comprises a folding ring, and a fixed part and a vibrating part that extend from both sides of the folding ring. The fixed part is connected to the frame. The dome is connected to the vibrating part. The upper voice diaphragm further comprises an inner edge connecting the folding ring to the vibrating part, and an outer edge connecting the folding ring to the fixed part. The inner edge comprises at least one arc concave edge that curves away from the dome. The dome comprises at least one arc protrusion corresponding to the arc concave edge. The sound production device can increase the vibration area of the vibrating diaphragm and adjusts the structural strength distribution of the sound production device to improve swing.

LIANG PING (CN)
ZHAO BIN (CN)

PCT/CN2020/104687

January 06, 2022

July 25, 2020

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AAC ACOUSTIC TECH SHENZHEN CO LTD (CN)
AAC TECHNOLOGIES PTE LTD (SG)

H04R7/04; H04R9/06; H04R9/02

CN104301845A	2015-01-21
CN210093500U	2020-02-18
CN210143111U	2020-03-13
CN207117942U	2018-03-16
US20110019865A1	2011-01-27
CN206908835U	2018-01-19

SHENZHEN ZICHEN INTELLECTUAL PROPERTY AGENCY LIMITED (CN)

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