US 12,294,847 B2
Tweeter and automobile audio system
Yuewu Shen, Suzhou (CN); Guoqiang Chai, Suzhou (CN); Yuping Xie, Suzhou (CN); Peng Gao, Suzhou (CN); and Bo Gu, Suzhou (CN)
Assigned to SUZHOU SONAVOX ELECT/RONICS CO., LTD., Suzhou (CN)
Appl. No. 17/997,062
Filed by SUZHOU SONAVOX ELECTRONICS CO., LTD., Suzhou (CN)
PCT Filed Apr. 25, 2021, PCT No. PCT/CN2021/089622
§ 371(c)(1), (2) Date Oct. 25, 2022,
PCT Pub. No. WO2021/218856, PCT Pub. Date Nov. 4, 2021.
Claims priority of application No. 202010338269.6 (CN), filed on Apr. 26, 2020.
Prior Publication US 2023/0179924 A1, Jun. 8, 2023
Int. Cl. H04R 9/06 (2006.01); H04R 1/28 (2006.01); H04R 9/02 (2006.01); H04R 9/04 (2006.01)
CPC H04R 9/06 (2013.01) [H04R 1/2849 (2013.01); H04R 9/025 (2013.01); H04R 9/045 (2013.01); H04R 2499/13 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A tweeter, comprising:
a bracket;
a diaphragm arranged on the bracket, and comprising a top portion and an edge ring around the top portion;
a magnetic motor system arranged on the bracket and having a magnetic gap, the magnetic motor system being located below the diaphragm; and
a voice coil having an upper end connected to the top portion of the diaphragm or an edge portion of the edge ring close to the top portion, and a lower end portion inserted into the magnetic gap;
wherein, a first cavity is formed between the top portion of the diaphragm, an inner wall of the voice coil, and the magnetic motor system;
the bracket is hollow to accommodate the magnetic motor system, the bracket has an annular inner flange and an annular outer flange, the inner flange is lower than the outer flange, the edge ring of the diaphragm is connected to the outer flange of the bracket, and the magnetic motor system is connected to the inner flange of the bracket, so that a second cavity is formed between the edge ring of the diaphragm, an outer wall of the voice coil, and the bracket;
a through hole is opened on the voice coil, and the first cavity is in communication with the second cavity by the through hole; and
the bracket has a groove formed between the outer flange and the inner flange, and the groove is a part of the second cavity, a damping material is arranged in the groove, and the damping material is polyurethane foam or foamed rubber or felt.