Title:
SOUND PRODUCTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/174578
Kind Code:
A1
Abstract:
The present invention provides a sound production device with two sound production surfaces capable of independently vibrating for sound production. The sound production device comprises a frame, a vibration system and a magnetic circuit system. The vibration system comprises an upper vibrating diaphragm and a lower vibrating diaphragm that are used for defining an accommodating space together with the frame, an upper voice coil and a lower voice coil that are respectively inserted into an inner magnetic gap and an outer magnetic gap, and a framework used for connecting the lower voice coil and the lower vibrating diaphragm, and a leakage hole in communication with the accommodating space is provided in the frame in a penetrating manner. The magnetic circuit system comprises a first clamping plate fixed to the frame and a second clamping plate which is opposite the first clamping plate and arranged in a spaced manner, and the first clamping plate is provided with a through hole opposite the second clamping plate; and the magnetic circuit system further comprises an inner magnetic part, a middle magnetic part forming the inner magnetic gap with the inner magnetic part, and an outer magnetic part forming the outer magnetic gap with the middle magnetic part, the first clamping plate is fixed to the sides of the middle magnetic part and the outer magnetic part facing the upper vibrating diaphragm, the second clamping plate is fixed to the sides of the inner magnetic part and the middle magnetic part facing the lower vibrating diaphragm, and the middle magnetic part is provided with an air channel enabling the outer magnetic gap to be in communication with the inner magnetic gap.
Inventors:
XIAO BO (CN)
LINGHU RONGLIN (CN)
ZHANG TONG (CN)
LINGHU RONGLIN (CN)
ZHANG TONG (CN)
Application Number:
PCT/CN2020/079062
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:
H04R7/06
Domestic Patent References:
| WO2018176660A1 | 2018-10-04 |
Foreign References:
| CN208638655U | 2019-03-22 | |||
| CN106101959A | 2016-11-09 | |||
| CN210093530U | 2020-02-18 | |||
| CN205622865U | 2016-10-05 |
Attorney, Agent or Firm:
SHENZHEN ZICHEN INTELLECTUAL PROPERTY AGENCY LIMITED (CN)
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