US 12,452,581 B2
Earphone core and earphone
Zhang Ren, Shenzhen (CN); and Zhiwei Zhong, Shenzhen (CN)
Assigned to AAC Microtech (Changzhou) Co., Ltd., Changzhou (CN)
Appl. No. 17/914,365
Filed by AAC Microtech (Changzhou) Co., Ltd., Changzhou (CN)
PCT Filed Jul. 20, 2022, PCT No. PCT/CN2022/106750
§ 371(c)(1), (2) Date Jan. 4, 2024,
PCT Pub. No. WO2024/000689, PCT Pub. Date Jan. 4, 2024.
Claims priority of application No. 202221689854.1 (CN), filed on Jun. 30, 2022.
Prior Publication US 2024/0223938 A1, Jul. 4, 2024
Int. Cl. H04R 1/10 (2006.01); H04R 1/28 (2006.01); H04R 7/18 (2006.01); H04R 9/02 (2006.01); H04R 9/06 (2006.01)
CPC H04R 1/2811 (2013.01) [H04R 1/10 (2013.01); H04R 1/1016 (2013.01); H04R 1/1075 (2013.01); H04R 7/18 (2013.01); H04R 9/025 (2013.01); H04R 9/06 (2013.01); H04R 2209/026 (2013.01); H04R 2499/11 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An earphone core, comprising:
a frame;
a vibration system; and
a magnetic circuit system;
wherein the vibration system and the magnetic circuit system are fixed to the frame; the vibration system comprises a vibrating diaphragm and a voice coil; the magnetic circuit system comprises an inner magnetic gap and an outer magnetic gap, the outer magnetic gap is defined around the inner magnetic gap; the vibrating diaphragm comprises a first vibrating diaphragm and a second vibrating diaphragm, the second vibrating diaphragm is disposed around the first vibrating diaphragm, an outer periphery of the first vibrating diaphragm and an inner periphery of the second vibrating diaphragm are both fixed to the magnetic circuit system, and the outer periphery of the second vibrating diaphragm is fixed to the frame; the voice coil comprises a first voice coil and a second voice coil, the first voice coil is inserted into the inner magnetic gap and drives the first vibrating diaphragm to vibrate, and the second voice coil is inserted into the outer magnetic gap and drives the second vibrating diaphragm to vibrate; the earphone core further comprises a front cover, the front cover is fixed to the frame, the first vibrating diaphragm and the front cover are enclosed to form a first cavity, the second vibrating diaphragm and the front cover are enclosed to form a second cavity, and the first cavity and the second cavity are separated; a first sound hole and a second sound hole penetrate through the front cover, the first sound hole is communicated with the first cavity, and the second sound hole is communicated with the second cavity.