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Patent Searching and Data


Title:
SOUND GENERATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/000082
Kind Code:
A1
Abstract:
The present application provides a sound generation device, comprising a basin frame, a vibration system and a magnetic circuit system having magnetic gaps. The vibration system comprises a vibrating diaphragm and a voice coil inserted into the magnetic gaps and driving the vibrating diaphragm to vibrate and generate sound; the voice coil comprises a pair of first side edges and a pair of second side edges; the second side edges are provided with elastic support members connected to the voice coil and held on the basin frame, the elastic support members and the second side edges are spaced apart to form an accommodation space, and the elastic support members each comprises an auxiliary vibrating diaphragm; the magnetic circuit system comprises a magnetic yoke, a main magnetic steel fixedly provided on the magnetic yoke, and first secondary magnetic steels and second secondary magnetic steels which are fixedly provided on the magnetic yoke and spaced apart from the main magnetic steel to form the magnetic gaps; ends, close to the auxiliary vibrating diaphragm, of the second secondary magnetic steels are recessed to form avoidance grooves, and the avoidance grooves are located at a side of the second secondary magnetic steels away from the main magnetic steel, the auxiliary vibrating diaphragms extend along the first side edges to form extension parts located in the avoidance grooves. Compared with the related art, the sound generation device of the present application can enlarge the auxiliary vibrating diaphragm in the case where the performance is substantially unchanged.

Inventors:
SONG WEI (CN)
ZHANG FAN (CN)
Application Number:
CN2019/093968
Publication Date:
January 07, 2021
Filing Date:
June 29, 2019
Export Citation:
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Assignee:
AAC ACOUSTIC TECH SHENZHEN CO LTD (CN)
AAC TECHNOLOGIES PTE LTD (CN)
International Classes:
H04R9/06
Foreign References:
CN208908488U2019-05-28
CN208908487U2019-05-28
CN208924469U2019-05-31
US20170347201A12017-11-30
Attorney, Agent or Firm:
SHENZHEN ZHONGYUANLIHE PATENT AND TRADEMARK FIRM (GENERAL PARTNERSHIP) (CN)
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