Title:
SOUND PRODUCTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/128332
Kind Code:
A1
Abstract:
Provided in the present invention is a sound production device, comprising a basin frame, a vibration system, and a magnetic circuit system, the vibration system comprising an annular upper diaphragm, a lower diaphragm, a voice coil, an upper framework, a lower framework, and an isolation diaphragm, the upper diaphragm being fixed to the basin frame and together with the basin frame enclosing an accommodating space, the side thereof furthest from the accommodating space being in communication with the outside and acting as an upper front cavity for the sound production of the upper diaphragm, the upper diaphragm being arranged around the magnetic circuit system at an interval; the lower diaphragm is arranged around the magnetic circuit system at an interval, the outer peripheral side of the lower diaphragm being fixed to the basin frame; the upper framework is respectively connected to the upper diaphragm and the voice coil; the lower framework is respectively connected to the lower diaphragm and the voice coil; the outer peripheral side of the isolation diaphragm is connected to the basin frame, and the inner peripheral side thereof is connected to the lower framework; the lower diaphragm, the lower framework, the isolation diaphragm, and the basin frame collectively divide the accommodating space into a lower front cavity used for the sound production of the lower diaphragm and a rear cavity shared by the upper diaphragm and the lower diaphragm. Compared to the prior art, the sound production device of the present invention has higher acoustic loudness and better acoustic performance.
Inventors:
SONG WEI (CN)
ZHANG FAN (CN)
JIN XIN (CN)
ZHANG FAN (CN)
JIN XIN (CN)
Application Number:
PCT/CN2019/129403
Publication Date:
July 01, 2021
Filing Date:
December 27, 2019
Export Citation:
Assignee:
AAC ACOUSTIC TECH SHENZHEN CO LTD (CN)
AAC TECHNOLOGIES PTE LTD (SG)
AAC TECHNOLOGIES PTE LTD (SG)
International Classes:
H04R9/02; H04R7/12; H04R9/06
Foreign References:
| CN110149580A | 2019-08-20 | |||
| CN207869372U | 2018-09-14 | |||
| US20190230441A1 | 2019-07-25 |
Attorney, Agent or Firm:
GUANGDONG GUANGHE LAW FIRM (CN)
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