US 11,950,071 B2
Acoustic device
Weimin Chen, Shenzhen (CN); Kejia Liu, Shenzhen (CN); and Yuheng Jiang, Shenzhen (CN)
Assigned to AAC Microtech (Changzhou) Co., Ltd., Changzhou (CN)
Filed by AAC Microtech (Changzhou) Co., Ltd., Changzhou (CN)
Filed on May 27, 2022, as Appl. No. 17/826,194.
Claims priority of application No. 202123176049.7 (CN), filed on Dec. 16, 2021.
Prior Publication US 2023/0199393 A1, Jun. 22, 2023
Int. Cl. H04R 7/12 (2006.01); H04R 7/20 (2006.01); H04R 9/02 (2006.01); H04R 9/04 (2006.01); H05K 1/18 (2006.01)
CPC H04R 7/127 (2013.01) [H04R 7/20 (2013.01); H04R 9/025 (2013.01); H04R 9/045 (2013.01); H05K 1/189 (2013.01)] 8 Claims
OG exemplary drawing
 
1. An acoustic device, comprising:
a frame;
a vibration system supported on the frame, the vibration system comprising:
a diaphragm;
a voice coil assembly driving the diaphragm to generate sounds, the voice coil assembly comprising:
a first voice coil with an annular shape, the first voice coil comprising a first leading wire;
a second voice coil surrounding an outer periphery of the first voice coil;
a support assembly connecting the frame and the voice coil assembly, the support assembly comprising:
a flexible circuit board mounted on a side of the voice coil assembly away from the diaphragm, the flexible circuit board comprising:
a first fixing end secured to the frame;
a second fixing end secured to the voice coil assembly,
a connecting portion connecting the first fixing end and the second fixing end, and
a soldering pad extending from the connecting portion;
a support membrane mounted on a side of the flexible circuit board away from the frame;
a magnetic system supported on the frame;
wherein the first leading wire comprises a first extension part extending from a surface of the first voice coil closed to the diaphragm and extending out of an outer edge of the second voice coil, a second extension part bending and extending from the first extension part along an outer surface of the second voice coil, and a soldering part welding to the soldering pad.