Title:
SOUND EMISSION DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/000156
Kind Code:
A1
Abstract:
Provided is a sound emission device. The sound emission device comprises: a basket; and a vibration system and a magnetic circuit system fixed at the basket. The vibration system comprises a first vibration diaphragm fixedly held at the basket, and a voice coil driving the first vibration diaphragm to vibrate and generate sound. The magnetic circuit system comprises a magnet yoke fixed at the basket, and a magnet portion fixed at the magnet yoke. The magnet portion has a magnetic gap. The basket comprises two first sides and two second sides. The magnet yoke comprises a main body portion arranged to be opposite to and spaced apart from the basket and bent portions extending from edges of the main body portion toward the second sides. The bent portion is fixed to the basket. The bent portion has a through hole extending therethrough. The through hole is in communication with the magnetic gap. The magnetic circuit system further comprises a breathable spacer attached to the bent portion and covering the through hole. Compared with the prior art, the sound emission device of the present invention can prevent separation of a steel magnet and a magnet yoke during a drop test.
Inventors:
SHEN KAIHUA (CN)
Application Number:
PCT/CN2019/094056
Publication Date:
January 07, 2021
Filing Date:
June 30, 2019
Export Citation:
Assignee:
AAC ACOUSTIC TECH SHENZHEN CO LTD (CN)
AAC TECHNOLOGIES PTE LTD (CN)
AAC TECHNOLOGIES PTE LTD (CN)
International Classes:
H04R9/02; H04R9/06
Foreign References:
| CN208638694U | 2019-03-22 | |||
| CN208638695U | 2019-03-22 | |||
| CN109275075A | 2019-01-25 |
Attorney, Agent or Firm:
SHENZHEN ZHONGYUANLIHE PATENT AND TRADEMARK FIRM (GENERAL PARTNERSHIP) (CN)
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