US 12,238,501 B2
Speaker unit
Yang Shi, Shenzhen (CN); and Jiasheng Zhou, Shenzhen (CN)
Assigned to AAC Microtech (Changzhou) Co., Ltd., Changzhou (CN)
Filed by AAC Microtech (Changzhou) Co., Ltd., Changzhou (CN)
Filed on Jan. 10, 2023, as Appl. No. 18/095,002.
Application 18/095,002 is a continuation of application No. PCT/CN2022/114908, filed on Aug. 25, 2022.
Claims priority of application No. 202221693068.9 (CN), filed on Jul. 1, 2022.
Prior Publication US 2024/0007797 A1, Jan. 4, 2024
Int. Cl. H04R 9/06 (2006.01); H04R 7/04 (2006.01); H04R 9/02 (2006.01); H04R 9/04 (2006.01); H05K 1/18 (2006.01)
CPC H04R 9/06 (2013.01) [H04R 7/04 (2013.01); H04R 9/025 (2013.01); H04R 9/046 (2013.01); H05K 1/189 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A speaker unit including:
a frame;
a vibration system fixed with the frame, having a diaphragm and a voice coil for driving the diaphragm for generating sound;
a magnetic circuit system fixed on the frame;
a magnetic front cover fixed on the frame for increasing a BL value of the voice coil,
wherein the magnetic circuit system includes a bottom plate, a main magnet fixed on the bottom plate, an auxiliary magnet fixed on the bottom plate and keeping a distance from the main magnet a main pole plate attached to the main magnet, and an auxiliary pole plate attached to the auxiliary magnet; the auxiliary pole plate includes a first flipped edge that is bent toward the bottom plate and is embedded in the frame.