US 12,149,908 B2
Sound device
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 Dec. 2, 2022, as Appl. No. 18/073,584.
Application 18/073,584 is a continuation of application No. PCT/CN2022/114674, filed on Aug. 25, 2022.
Prior Publication US 2024/0073615 A1, Feb. 29, 2024
Int. Cl. H04R 9/06 (2006.01); H04R 1/24 (2006.01); H04R 9/02 (2006.01); H04R 9/04 (2006.01)
CPC H04R 9/025 (2013.01) [H04R 1/24 (2013.01); H04R 9/045 (2013.01); H04R 9/046 (2013.01); H04R 9/06 (2013.01); H04R 9/063 (2013.01); H04R 2209/026 (2013.01); H04R 2400/11 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A sound device comprising:
a frame with a receiving space;
a magnet system received in the receiving space, comprising:
a first central yoke located in a central position;
a central magnet mounted on the first central yoke;
a side yoke surrounding the central magnet to form a magnetic gap; and
a connection portion connecting the first central yoke and the side yoke;
a first vibration system arranged on one side of the magnet system, comprising:
a first diaphragm fixed to the frame; and
a first coil inserted in the magnetic gap and configured to drive the first diaphragm;
a second vibration system arranged on the other side of the magnet system, comprising:
a second diaphragm fixed to the frame; and
a second coil inserted in the magnetic gap and configured to drive the second diaphragm; wherein
the side yoke comprises a first side yoke fixed to the frame and a second side yoke bending and extending from an edge of the first side yoke towards the central magnet; the connection portion connects the first central yoke and the second side yoke.