Title:
SOUND GENERATOR
Document Type and Number:
WIPO Patent Application WO/2022/068083
Kind Code:
A1
Abstract:
Disclosed is a sound generator, comprising: a housing; and a vibration system and a magnetic circuit system, which are fixedly connected to the housing, wherein the vibration system comprises a main vibration diaphragm and a voice coil; the magnetic circuit system comprises a side magnetic portion and a central magnetic portion; the central magnetic portion comprises a magnetic conductive yoke and a central magnet; the magnetic conductive yoke comprises a bottom wall; the central magnet is located on a side of the bottom wall of the magnetic conductive yoke close to the main vibration diaphragm; the central magnetic portion is of a centrally hollow structure; and a magnetic gap for accommodating the voice coil is formed between the center magnet and the side magnet portion. The sound generator further comprises an annular framework which is located at an inner side of an edge of the centrally hollow portion of the central magnetic portion and is fixedly connected on the main vibration diaphragm; one end of the annular framework away from the main vibration diaphragm is fixedly connected to an auxiliary vibration diaphragm; and an outer edge of the auxiliary vibration diaphragm is fixedly connected to the edge of the centrally hollow portion of the central magnetic portion. The present application can reduce the polarization generated during the vibration of the vibration diaphragm in the sound generator structure, and improve the sound output effect of a product at medium and low frequencies.
Inventors:
ZHU XI (CN)
ZHOU CHANGGUO (CN)
LIU GUANGLEI (CN)
ZHOU CHANGGUO (CN)
LIU GUANGLEI (CN)
Application Number:
PCT/CN2020/136702
Publication Date:
April 07, 2022
Filing Date:
December 16, 2020
Export Citation:
Assignee:
GOERTEK INC (CN)
International Classes:
H04R1/10; H04R9/06
Foreign References:
| CN108449700A | 2018-08-24 | |||
| CN108810770A | 2018-11-13 | |||
| CN104125528A | 2014-10-29 | |||
| CN107172546A | 2017-09-15 | |||
| US20180332397A1 | 2018-11-15 | |||
| US20200275212A1 | 2020-08-27 | |||
| US20190215612A1 | 2019-07-11 | |||
| US20160088396A1 | 2016-03-24 |
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