Title:
SOUND GENERATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/067987
Kind Code:
A1
Abstract:
Provided in the present invention is a sound generation device, comprising a vibration system and a magnetic circuit system for driving the vibration system to vibrate and generate sound. The magnetic circuit system is provided with a magnetic gap. The vibration system comprises a diaphragm and a voice coil, which is inserted into the magnetic gap to drive the diaphragm to vibrate and generate sound. The diaphragm comprises: a vibration portion in an annular shape; an outer rim, which is bent and extends from the outer periphery of the vibration portion; an inner rim, which is bent and extends from the inner periphery of the vibration portion; and a first fixing portion, which is formed by means of the inner rim being extended, with the first fixing portion abutting against and being fixed on the magnetic circuit system. The vibration system further comprises a framework for suspending the voice coil in the magnetic gap. The framework comprises a framework body, and a framework connecting arm formed by means of the framework body being extended towards the voice coil. The framework connecting arm extends into the magnetic gap and is connected to the voice coil. A groove is formed in a position, corresponding to the framework connecting arm, of a joint between the first fixing portion and the inner rim, which groove is recessed, from a side thereof close to the framework, in a direction away from the framework. Compared with the related art, the sound generation device in the present invention has a better acoustic performance.
Inventors:
XIAO BO (CN)
SONG WEI (CN)
LINGHU RONGLIN (CN)
KONG CHENLIANG (CN)
ZHANG TONG (CN)
SONG WEI (CN)
LINGHU RONGLIN (CN)
KONG CHENLIANG (CN)
ZHANG TONG (CN)
Application Number:
PCT/CN2020/128279
Publication Date:
April 07, 2022
Filing Date:
November 12, 2020
Export Citation:
Assignee:
AAC ACOUSTIC TECH SHENZHEN CO LTD (CN)
AAC MICROTECH CHANGZHOU CO LTD (CN)
AAC MICROTECH CHANGZHOU CO LTD (CN)
International Classes:
H04R9/06; H04R1/20; H04R9/02
Foreign References:
| CN111641904A | 2020-09-08 | |||
| CN110996226A | 2020-04-10 | |||
| CN209314042U | 2019-08-27 | |||
| CN105101022A | 2015-11-25 | |||
| US20050111690A1 | 2005-05-26 |
Attorney, Agent or Firm:
SHENZHEN JUNXINCHENG INTELLECTUAL PROPERTY FIRM (GENERAL PARTNERSHIP) (CN)
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