Title:
SOUND PRODUCTION APPARATUS AND TERMINAL DEVICE
Document Type and Number:
WIPO Patent Application WO/2024/022484
Kind Code:
A1
Abstract:
A sound production apparatus (100) and a terminal device. The sound production apparatus (100) comprises a basket (1), a magnetic circuit system (2) and a vibration system (3), wherein the basket (1) is provided with an accommodating cavity (11), and the magnetic circuit system (2) comprises a U-yoke (21) arranged in the accommodating cavity (11) and an inner magnetic circuit portion (22); the U-yoke (21) is provided with an accommodating recess (211), and the inner magnetic circuit portion (22) is arranged in the accommodating recess (211) and is spaced apart from a side wall of the accommodating recess (211) to form a magnetic gap (23); the side of the inner magnetic circuit portion (22) facing the magnetic gap (23) is provided with a notch slot (2221); the vibration system (3) comprises a diaphragm (31) and a voice coil (32) connected to the diaphragm (31), the diaphragm (31) being connected to the basket (1) and arranged opposite the magnetic circuit system (2); the end of the voice coil (32) away from the diaphragm (31) is suspended in the magnetic gap (23); and the length of the notch slot (2221) in the axial direction of the magnetic gap (23) is defined as a, and the length of the notch slot (2221) in a direction perpendicular to the axial direction of the magnetic gap (23) is defined as b, where 1.8≤a/b≤2.2. The sound production apparatus (100) not only effectively reduces the weight, but also meets the design requirements of miniaturization and the property of being lightwight while ensuring a desirable BL value and linear range.
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Inventors:
SUN MINGJUN (CN)
WU JIANGTAO (CN)
ZHANG DI (CN)
WU JIANGTAO (CN)
ZHANG DI (CN)
Application Number:
PCT/CN2023/109827
Publication Date:
February 01, 2024
Filing Date:
July 28, 2023
Export Citation:
Assignee:
WEIFANG GOERDYNA TECH CO LTD (CN)
International Classes:
H04R9/02; H04R9/06
Domestic Patent References:
| WO2008004272A1 | 2008-01-10 |
Foreign References:
| CN115065917A | 2022-09-16 | |||
| CN103188591A | 2013-07-03 | |||
| CN108322861A | 2018-07-24 | |||
| CN109462806A | 2019-03-12 | |||
| CN113691912A | 2021-11-23 | |||
| CN114466288A | 2022-05-10 |
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