Title:
SOUND PRODUCTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/237795
Kind Code:
A1
Abstract:
Disclosed is a sound production device (100), comprising a housing (1) and a sound production unit (2), which is fixedly accommodated in the housing (1). The sound production unit (2) and the housing (1) jointly enclose a closed rear sound cavity (10), the sound production unit (2) comprises a frame (21), a vibration system (22) respectively supported and fixed on the frame (21), and a magnetic circuit system (23) driving the vibration system (22) to vibrate and produce sound, and the vibration system (22) comprises a vibrating diaphragm (221) fixed on the frame (21); the housing (1) comprises a rear housing (11) which is positioned on a side of the frame (21) far away from the vibrating diaphragm (221) and is spaced apart from the sound production unit (2), and a side wall (12) extending from the periphery of the rear housing (11) in the direction of the vibrating diaphragm (221), the side wall (12) surrounding a peripheral side of the frame (21); the thickness of the housing (1) is less than that of the frame (21); the side wall (12) is attached to the frame (21), or an interval (102) is provided between the side wall (12) and at least one side of the frame (21), and the interval (102) is three times smaller than the thickness of the housing (1); and the rear sound cavity (10) is jointly enclosed by the rear housing (11), the side wall (12) and the sound production unit (2), a leakage hole (103) penetrating the housing (1) is provided in the housing, and the rear sound cavity (10) is in communication with the outside by means of the leakage hole (103).
Inventors:
WU SHUWEN (CN)
CAO CHENGMING (CN)
CAO CHENGMING (CN)
Application Number:
PCT/CN2020/094725
Publication Date:
December 02, 2021
Filing Date:
June 05, 2020
Export Citation:
Assignee:
AAC ACOUSTIC TECH SHENZHEN CO LTD (CN)
AAC TECHNOLOGIES PTE LTD (SG)
AAC TECHNOLOGIES PTE LTD (SG)
International Classes:
H04R1/20; H04R9/02; H04R9/06
Foreign References:
| CN106973348A | 2017-07-21 | |||
| CN110234042A | 2019-09-13 | |||
| CN207070324U | 2018-03-02 | |||
| CN108322871A | 2018-07-24 | |||
| CN206575596U | 2017-10-20 | |||
| CN204598310U | 2015-08-26 | |||
| CN203618121U | 2014-05-28 | |||
| CN109040926A | 2018-12-18 |
Attorney, Agent or Firm:
SHENZHEN JUNXINCHENG INTELLECTUAL PROPERTY FIRM (GENERAL PARTNERSHIP) (CN)
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