Title:
SOUND PRODUCTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/128335
Kind Code:
A1
Abstract:
The present invention provides a sound production device, which comprises a frame, a vibration system, and a magnetic circuit system. The vibration system comprises an upper vibrating diaphragm, a lower vibrating diaphragm, a voice coil, an annular framework, and an isolation voice diaphragm. The upper vibrating diaphragm is fixed on the frame and defines an accommodating space together with the frame. The side of the upper vibrating diaphragm distant from the accommodating space is communicated with the outside and serves as an upper front cavity for sound production of the upper vibrating diaphragm. The outer peripheral side of the lower vibrating diaphragm and the outer peripheral side of an isolation vibrating diaphragm are respectively connected to the frame, and the inner peripheral side of the lower vibrating diaphragm and the inner peripheral side of the isolation voice diaphragm are respectively connected to the framework. The voice coil is respectively connected to the upper vibrating diaphragm and the framework, drives the upper vibrating diaphragm to vibrate, and drives the framework to drive the lower vibrating diaphragm to vibrate at the same time. The isolation vibrating diaphragm, the lower vibrating diaphragm, the framework and the frame jointly divide the accommodating space into a lower front cavity used for sound production of the lower vibrating diaphragm and a rear cavity shared by the upper vibrating diaphragm and the lower vibrating diaphragm. The frame is provided with a sound production hole for communicating the lower front cavity with the outside. Compared with the prior art, the sound production device of the present invention is higher in acoustic loudness and better in acoustic performance.
Inventors:
SONG WEI (CN)
ZHANG FAN (CN)
JIN XIN (CN)
ZHANG FAN (CN)
JIN XIN (CN)
Application Number:
PCT/CN2019/129407
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:
H04R7/12; H04R9/04
Foreign References:
| CN209375908U | 2019-09-10 | |||
| CN108513230A | 2018-09-07 | |||
| CN207835793U | 2018-09-07 | |||
| US20110044491A1 | 2011-02-24 |
Attorney, Agent or Firm:
GUANGDONG GUANGHE LAW FIRM (CN)
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