Title:
LOUDSPEAKER
Document Type and Number:
WIPO Patent Application WO/2021/174568
Kind Code:
A1
Abstract:
The present invention provides a loudspeaker capable of increasing an effective vibration area. The loudspeaker comprises a housing, a vibration system and a magnetic circuit system. The vibration system comprises a vibration diaphragm, a voice coil for driving the vibration diaphragm to vibrate and produce sound, an upper framework and a lower framework; the vibration diaphragm comprises an upper vibration diaphragm, a middle vibration diaphragm and a lower vibration diaphragm; and the outer edges of the upper vibration diaphragm, the middle vibration diaphragm and the lower vibration diaphragm are fixed on the housing, and the middle vibration diaphragm and the lower vibration diaphragm are provided around the magnetic circuit system. The vibration system further comprises the upper framework connected to the upper vibration diaphragm and the lower framework provided around the magnetic circuit system; the inner edge of the middle vibration diaphragm is clamped between the upper framework and the lower framework, the inner edge of the lower vibration diaphragm is fixedly provided on the lower framework. The housing is provided with an accommodation space and a sound guide channel; and the accommodation space is divided, by means of the upper vibration diaphragm, the middle vibration diaphragm, the lower vibration diaphragm and the lower framework, into a lower diaphragm front cavity for the lower vibration diaphragm to produce sound and a rear cavity shared by the upper vibration diaphragm and the lower vibration diaphragm. The sound guide channel is in communication with an upper diaphragm front cavity and the lower diaphragm front cavity; and the housing is provided with a sound output channel in communication with the upper diaphragm front cavity.
Inventors:
LINGHU RONGLIN (CN)
XIAO BO (CN)
ZHANG TONG (CN)
XIAO BO (CN)
ZHANG TONG (CN)
Application Number:
PCT/CN2020/078759
Publication Date:
September 10, 2021
Filing Date:
March 11, 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; H04R7/12; H04R7/20; H04R9/04; H04R9/06
Foreign References:
| CN203301728U | 2013-11-20 | |||
| CN107277713A | 2017-10-20 | |||
| JP3169829U | 2011-08-18 |
Attorney, Agent or Firm:
SHENZHEN ZICHEN INTELLECTUAL PROPERTY AGENCY LIMITED (CN)
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