Title:
SOUND PRODUCTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/068002
Kind Code:
A1
Abstract:
The present application provides a sound production device, comprising a vibration system and a magnetic circuit system that drives the vibration system to produce sound and has a magnetic gap. The vibration system comprises a diaphragm and a voice coil inserted in the voice gap to drive the diaphragm to vibrate and produce sound. The magnetic circuit system comprises a magnetic yoke, and a main magnetic steel and first auxiliary magnetic steels fixed to the magnetic yoke. The main magnetic steel and the first auxiliary magnetic steels are spaced and jointly define the magnetic gap. There are two first auxiliary magnetic steels, which are respectively located on two opposite sides of the main magnetic steel. The main magnetic steel comprises an upper main magnetic steel, a main pole core, and a lower magnetic steel sequentially stacked in the vibration direction of the diaphragm. The lower main magnetic steel is fixed to the magnetic yoke. The present application provides two types of sound production devices, the main magnetic steel of each of the two types of sound production devices comprises an upper main magnetic steel, a main pole core, and a lower main magnetic steel sequentially stacked in the vibration direction of the diaphragm, and the lower main magnetic steel is fixed to the magnetic yoke. Compared with the related art, the sound production device of the present invention has high sensitivity and excellent acoustic performance.
Inventors:
SONG WEI (CN)
LINGHU RONGLIN (CN)
XIAO BO (CN)
ZHANG TONG (CN)
KONG CHENLIANG (CN)
LINGHU RONGLIN (CN)
XIAO BO (CN)
ZHANG TONG (CN)
KONG CHENLIANG (CN)
Application Number:
PCT/CN2020/128836
Publication Date:
April 07, 2022
Filing Date:
November 13, 2020
Export Citation:
Assignee:
AAC ACOUSTIC TECH SHENZHEN CO LTD (CN)
AAC TECHNOLOGIES PTE LTD (SG)
AAC TECHNOLOGIES PTE LTD (SG)
International Classes:
H04R9/02
Foreign References:
| CN209659586U | 2019-11-19 | |||
| CN111405423A | 2020-07-10 | |||
| CN206498525U | 2017-09-15 | |||
| CN205356672U | 2016-06-29 | |||
| CN209390360U | 2019-09-13 | |||
| CN207766533U | 2018-08-24 | |||
| JP2008035055A | 2008-02-14 |
Attorney, Agent or Firm:
SHENZHEN JUNXINCHENG INTELLECTUAL PROPERTY FIRM (GENERAL PARTNERSHIP) (CN)
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