Title:
SOUND GENERATING DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/174577
Kind Code:
A1
Abstract:
Provided by the present invention is a sound generating device, which comprises a basin frame, a vibration system and a magnetic circuit system. A leakage hole penetrates the basin frame. The vibration system comprises an upper diaphragm, a lower diaphragm, an upper voice coil, a lower voice coil and a skeleton that connects the lower voice coil and the lower diaphragm. The upper diaphragm, the lower diaphragm and the basin frame are enclosed to form an accommodating space. The magnetic circuit system is accommodated in the accommodating space. The magnetic circuit system comprises a splint that holds and fixes the basin frame and a first magnetic part, a second magnetic part and a third magnetic part fixed on the splint. The second magnetic part is spaced apart from the first magnetic part to form an inner magnetic gap. The third magnetic part is located on the side of the second magnetic part away from the first magnetic part, and is spaced apart from the second magnetic part to form an outer magnetic gap. The third magnetic part has a leakage channel that communicates the outer magnetic gap and the leakage hole. The upper voice coil is inserted into the inner magnetic gap, the lower voice coil is inserted into the outer magnetic gap, and an avoidance hole for avoiding the skeleton penetrates the splint. Compared to the related art, two sound generating surfaces of the sound generating device of the present invention may independently vibrate and generate sound.
Inventors:
XIAO BO (CN)
LINGHU RONGLIN (CN)
ZHANG TONG (CN)
LINGHU RONGLIN (CN)
ZHANG TONG (CN)
Application Number:
PCT/CN2020/079058
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
Foreign References:
| CN208850052U | 2019-05-10 | |||
| CN205142500U | 2016-04-06 | |||
| CN207835795U | 2018-09-07 | |||
| CN107801133A | 2018-03-13 | |||
| CN206413193U | 2017-08-15 | |||
| EP3429228A1 | 2019-01-16 | |||
| US9674603B1 | 2017-06-06 |
Attorney, Agent or Firm:
SHENZHEN ZICHEN INTELLECTUAL PROPERTY AGENCY LIMITED (CN)
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