US 12,335,709 B2
Sound generator
Xuedong Lv, Shenzhen (CN); Xiaoqiong Feng, Shenzhen (CN); Kun Yang, Shenzhen (CN); Zhen Huang, Shenzhen (CN); and Yi Shao, Shenzhen (CN)
Assigned to AAC Microtech (Changzhou) Co., Ltd., Changzhou (CN)
Filed by AAC Microtech (Changzhou) Co., Ltd., Changzhou (CN)
Filed on Jan. 16, 2023, as Appl. No. 18/097,460.
Application 18/097,460 is a continuation of application No. PCT/CN2022/114673, filed on Aug. 25, 2022.
Prior Publication US 2024/0073622 A1, Feb. 29, 2024
Int. Cl. H04R 25/00 (2006.01); H04R 7/16 (2006.01); H04R 9/04 (2006.01); H04R 9/06 (2006.01)
CPC H04R 9/046 (2013.01) [H04R 7/16 (2013.01); H04R 9/045 (2013.01); H04R 9/06 (2013.01); H04R 2400/11 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A sound generator, comprising a frame having an accommodation space, a magnetic circuit unit accommodated in the accommodation space, and a first vibration unit and a second vibration unit arranged at two sides of the magnetic circuit unit, respectively,
wherein the magnetic circuit unit comprises a first central magnetic yoke at a middle position, a central magnet fixed to the first central magnetic yoke, a side magnet component arranged around the central magnet and fixed to the frame, and a connecting portion connecting the first central magnetic yoke to the side magnet component; and wherein the central magnet and the side magnet component are spaced apart from each other to form a magnetic gap;
wherein the first vibration unit comprises a first diaphragm that is fixed to the frame and a first voice coil that drives the first diaphragm to vibrate to produce sound;
wherein the second vibration unit comprises a second diaphragm that is fixed to the frame and a second voice coil that drives the second diaphragm to vibrate to produce sound; and
wherein the central magnet comprises a first magnet portion that is fixed to the first central magnetic yoke and a second magnet portion that is fixed to one side of the first magnet portion away from the first central magnetic yoke, and wherein a projection area of the first magnet portion along a vibrating direction is greater than a projection area of the second magnet portion along the vibrating direction;
wherein the magnetic gap comprises a first magnetic gap formed by the first magnet portion and the side magnet component that are spaced apart from each other, and a second magnetic gap formed by the second magnet portion and the side magnet component that are spaced apart from each other, and
wherein the first voice coil is arranged to insert into the first magnetic gap, and the second voice coil is arranged to insert into the second magnetic gap;
wherein the side magnet component comprises a side magnet fixed to the frame, a first side magnetically conductive plate fixed to a side of the side magnet facing the first diaphragm, and a second side magnetically conductive plate fixed to a side of the side magnet facing the second diaphragm, and wherein the connecting portion connects the second side magnetically conductive plate and the first central magnetic yoke;
wherein the connecting portion comprises a first connecting portion connected to the first central magnetic yoke, a second connecting portion connected to the second side magnetically conductive plate, and a third connecting portion connecting the first connecting portion and the second connecting portion,
wherein the first connecting portion is fixed to a surface of the first central magnetic yoke facing the central magnet, and
the second connecting portion is fixed to a surface of the second side magnetically conductive plate facing the first central magnetic yoke.