Title:
SOUND DIAPHRAGM AND SPEAKER
Document Type and Number:
WIPO Patent Application WO/2021/119905
Kind Code:
A1
Abstract:
The present application provides a sound diaphragm and a speaker. The sound diaphragm comprises a top dome portion located at the middle position, a bent annular portion provided around the top dome portion, and a fixing portion extending outwardly from the edge of the bent annular portion. The bent annular portion includes a first bent annular portion and several second bent annular portions, the several second bent annular portions are provided at intervals at the outer edge and/or the inner edge of the first bent annular portion, the first bent annular portion comprises a first part and a second part, the second bent annular portions are provided at the outer edge and/or the inner edge of the first part, and the sum of the width of the first part and the width of the second bent annular portion is equal to the width of the second part. The sound diaphragm of the present application can reduce the risk of generating split vibration at a high frequency, so that there is no deep valley in a sensitivity curve of the sound diaphragm at a high frequency in this embodiment; moreover, a resonant frequency of the speaker does not rise, and the sensitivity of the sound diaphragm at a low frequency is not lost.
Inventors:
ZHANG TONG (CN)
Application Number:
PCT/CN2019/125579
Publication Date:
June 24, 2021
Filing Date:
December 16, 2019
Export Citation:
Assignee:
AAC ACOUSTIC TECH SHENZHEN CO LTD (CN)
AAC TECHNOLOGIES PTE LTD (SG)
AAC TECHNOLOGIES PTE LTD (SG)
International Classes:
H04R7/14
Foreign References:
| CN207869348U | 2018-09-14 | |||
| CN208638607U | 2019-03-22 | |||
| US20150124992A1 | 2015-05-07 |
Attorney, Agent or Firm:
SHENZHEN CIPRUN INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)
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