Title:
SOUND PRODUCTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/206045
Kind Code:
A1
Abstract:
Disclosed in the present invention is a sound production device. The sound production device comprises a housing, a magnetic circuit system, and two vibration systems. The magnetic circuit system comprises a central magnetic circuit structure and a side magnetic circuit structure. The central magnetic circuit structure comprises a central magnet and two central magnetically-conductive plates, each central magnetically-conductive plate comprises a first magnetically-conductive portion corresponding to the central magnet, at least one central magnetically-conductive plate comprises a first connection portion extending from an edge to an outer side of the first magnetically-conductive portion, and the first connection portion is connected to the housing. The side magnetic circuit structure comprises a plurality of side magnets and side magnetically-conductive plates, and the side magnets and the first connection portions are distributed at intervals in the circumferential direction of the central magnet. A magnetic gap is separately formed between the central magnet and each central magnetically-conductive plate and between each side magnet and the corresponding side magnetically-conductive plate. Each vibration system comprises a diaphragm and a voice coil, the diaphragms are mounted on the housing, the two diaphragms are separately arranged on two opposite sides of the magnetic circuit system, and the voice coil of each vibration system extends into the magnetic gap. According to the technical solution of the present invention, the sound loudness of the sound production device can be promoted while double-sided sounding is achieved.
Inventors:
CAI XIAODONG (CN)
LI BOBO (CN)
LIU SONG (CN)
LI BOBO (CN)
LIU SONG (CN)
Application Number:
PCT/CN2021/139417
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:
| CN113099362A | 2021-07-09 | |||
| CN209267799U | 2019-08-16 | |||
| CN211531284U | 2020-09-18 | |||
| CN209659588U | 2019-11-19 |
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