Title:
SOUND PRODUCTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/174576
Kind Code:
A1
Abstract:
The present invention provides a sound production device having two sound production surfaces capable of independently vibrating and producing sound. The sound production device comprises a basin stand, a vibration system, and a magnetic circuit system. The vibration system comprises a first vibration system and a second vibration system; the first vibration system comprises an upper vibrating diaphragm and an upper voice coil; the second vibration system comprises a lower vibrating diaphragm and a lower voice coil; the upper vibrating diaphragm, the lower vibrating diaphragm, and the basin stand are enclosed to form an accommodating space. The magnetic circuit system comprises a first clamping plate and a second clamping plate; the magnetic circuit system comprises an inner magnetic part, a middle magnetic part forming an inner magnetic gap with the inner magnetic part, and an outer magnetic part forming an outer magnetic gap with the middle magnetic part; the first clamping plate, the second clamping plate, and the middle magnetic part partition the accommodating space into a first rear cavity and a second rear cavity which are not communicated with each other; a first leakage hole for communicating the first rear cavity with the outside and a second leakage hole for communicating the second rear cavity with the outside are formed in the basin stand in a penetrating manner. The sound production device in the present invention remarkably improves the utilization rate of a magnetic circuit.
Inventors:
XIAO BO (CN)
LINGHU RONGLIN (CN)
ZHANG TONG (CN)
LINGHU RONGLIN (CN)
ZHANG TONG (CN)
Application Number:
PCT/CN2020/079057
Publication Date:
September 10, 2021
Filing Date:
March 12, 2020
Export Citation:
Assignee:
AAC ACOUSTIC TECH SHENZHEN CO LTD (CN)
AAC TECHNOLOGIES PTE LTD (SG)
AAC TECHNOLOGIES PTE LTD (SG)
International Classes:
H04R9/02; H04R9/04; H04R9/06
Foreign References:
| CN109936803A | 2019-06-25 | |||
| CN109756828A | 2019-05-14 | |||
| CN209283487U | 2019-08-20 | |||
| CN209659588U | 2019-11-19 | |||
| CN110401903A | 2019-11-01 | |||
| US20170272866A1 | 2017-09-21 |
Attorney, Agent or Firm:
SHENZHEN ZICHEN INTELLECTUAL PROPERTY AGENCY LIMITED (CN)
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