US 12,407,978 B2
Speaker box
Haijuan Yang, Changzhou (CN); and Shuwen Wu, Changzhou (CN)
Assigned to AAC Microtech (Changzhou) Co., Ltd., Changzhou (CN)
Filed by AAC Microtech (Changzhou) Co., Ltd., Jiangsu (CN)
Filed on May 29, 2023, as Appl. No. 18/325,077.
Application 18/325,077 is a continuation of application No. PCT/CN2023/084870, filed on Mar. 29, 2023.
Claims priority of application No. 202223196602.8 (CN), filed on Nov. 30, 2022.
Prior Publication US 2024/0179455 A1, May 30, 2024
Int. Cl. H04R 1/28 (2006.01); H04R 1/02 (2006.01); H04R 3/00 (2006.01); H04R 7/04 (2006.01); H04R 9/02 (2006.01); H04R 9/04 (2006.01); H04R 9/06 (2006.01)
CPC H04R 1/288 (2013.01) [H04R 1/025 (2013.01); H04R 3/00 (2013.01); H04R 7/04 (2013.01); H04R 9/025 (2013.01); H04R 9/045 (2013.01); H04R 9/06 (2013.01); H04R 2400/11 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A speaker box comprising: a housing and a speaker unit housed in the housing, the speaker unit and the housing form the rear cavity of the speaker box, the rear cavity is filled with sound-absorbing powder;
wherein, the speaker unit comprises a frame, a vibration system and a magnetic circuit system respectively fixed to the frame, and a metal cover fixed between the frame and the magnetic circuit system;
the metal cover comprises a bottom wall set at a bottom of the speaker unit and a side wall extending from the bottom wall and set at a side of the speaker unit;
the vibration system, the frame, the metal cover and the magnetic circuit system enclosing a internal space of the speaker unit;
the bottom wall and/or the side wall are provided with leak structures formed by stamping communicating the internal space and the rear cavity, the leak structure comprising a bar-shaped through-hole and a bar-shaped bulge corresponding to the bar-shaped through-hole;
the bar-shaped bulge extends towards the internal space, the bar-shaped bulge of the leak structure formed on the bottom wall abuts against the magnetic circuit system, and the bar-shaped bulge being directly contacted with the magnetic circuit system.