Title:
SOUND PRODUCTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/206046
Kind Code:
A1
Abstract:
Disclosed in the present invention is a sound production device, comprising a shell, a magnetic circuit system, a first vibration system, and a second vibration system. The magnetic circuit system comprises a central magnetic circuit structure and a side magnetic circuit structure fixed to the shell. The central magnetic circuit structure comprises a central magnet and two central magnetic conductive plates. Each central magnetic conductive plate comprises a first magnetic conductive portion corresponding to the central magnet. The at least one central magnetic conductive plate comprises a connecting portion connected to an edge of the first magnetic conductive portion. The connecting portion is connected to the shell or the side magnetic circuit structure. A magnetic gap is formed between the center magnet and the center magnetic conductive plate and the side magnet and the side magnetic conductive plate. The first vibration system comprises a first diaphragm and an annular voice coil provided on the first diaphragm. The second vibration system comprises a second diaphragm and a flat voice coil provided on the second diaphragm. The second diaphragm is located on the side of the magnetic circuit system away from the first diaphragm. The flat voice coil and the connecting portion are distributed at intervals in the circumferential direction of the central magnet. The technical solution of the present invention can increase the vibration space of the voice coil in the magnetic gap while achieving double-sided sound production.
Inventors:
CAI XIAODONG (CN)
LI BOBO (CN)
LIU SONG (CN)
LI BOBO (CN)
LIU SONG (CN)
Application Number:
PCT/CN2021/139425
Publication Date:
October 06, 2022
Filing Date:
December 18, 2021
Export Citation:
Assignee:
GOERTEK INC (CN)
International Classes:
H04R9/02; H04R9/04; H04R9/06
Domestic Patent References:
| WO2010007440A2 | 2010-01-21 |
Foreign References:
| CN113099363A | 2021-07-09 | |||
| CN209267799U | 2019-08-16 | |||
| CN211531284U | 2020-09-18 | |||
| CN209659588U | 2019-11-19 |
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