US 11,750,978 B2
Sound generator
Xudong Yan, Shenzhen (CN); Tao Shao, Shenzhen (CN); and Xiaojiang Gu, Shenzhen (CN)
Assigned to AAC Microtech (Changzhou) Co., Ltd., Changzhou (CN)
Filed by AAC Microtech (Changzhou) Co., Ltd., Changzhou (CN)
Filed on Nov. 26, 2021, as Appl. No. 17/535,720.
Claims priority of application No. 202011384279.X (CN), filed on Nov. 30, 2020.
Prior Publication US 2022/0174415 A1, Jun. 2, 2022
Int. Cl. H04R 9/02 (2006.01); H04R 9/04 (2006.01)
CPC H04R 9/025 (2013.01) [H04R 9/046 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A sound generator, comprising
a bracket, and
a magnetic circuit system, a first vibration system, and a second vibration system that are fixedly connected to the bracket,
wherein the bracket has a first opening and a second opening that face opposite directions, the magnetic circuit system is used for driving the first vibration system to generate sound in a first direction from the second opening toward the first opening and driving the second vibration system to generate sound in a second direction opposite to the first direction, the first vibration system comprises a first voice coil, and the second vibration system comprises a second voice coil,
wherein the magnetic circuit system comprises a first magnet, a second magnet, and a third magnet that are sequentially spaced and oppositely disposed in the second direction,
wherein the polarity of a magnetic pole, which is opposite to the second magnet, of the first magnet is the same as the polarity of a magnetic pole, which is opposite to the first magnet, of the second magnet, the polarity of a magnetic pole, which is opposite to the third magnet, of the second magnet is the same as the polarity of a magnetic pole, which is opposite to the second magnet, of the third magnet, the first voice coil is sleeved on outer sides of the first magnet and the second magnet simultaneously, and the second voice coil is sleeved on outer sides of the second magnet and the third magnet simultaneously,
wherein the magnetic circuit system further comprises a first pole core and a second pole core, wherein the first pole core is disposed between the first magnet and the second magnet and is disposed opposite to the first voice coil in a direction perpendicular to the first direction, and the second pole core is disposed between the second magnet and the third magnet and is disposed opposite to the second voice coil in a direction perpendicular to the second direction.