Title:
LOUDSPEAKER BOX
Document Type and Number:
WIPO Patent Application WO/2021/174570
Kind Code:
A1
Abstract:
The present invention provides a loudspeaker box capable of increasing an effective vibration area. The loudspeaker box comprises a box body having an accommodation cavity and a sound production device; the accommodation cavity is divided into a front cavity and a rear cavity by means of a partition plate, and a single leakage hole in communication with the rear cavity is provided on the partition plate; a sound output hole in communication with the front cavity is provided on the box body in a penetrating manner; the sound production device is suspended within the front cavity, and the sound production device comprises a basket, a vibration system and a magnetic circuit system; a leakage hole in communication with the single leakage hole is provided on the basket; the vibration system comprises the basket, an upper vibration diaphragm and a lower vibration diaphragm which are opposite in vibration directions, an upper voice coil, a lower voice coil and a framework connecting the lower voice coil and the lower vibration diaphragm; the magnetic circuit system comprises a clamping plate, a first magnetic portion, a second magnetic portion forming an inner magnetic gap with the first magnetic portion, and a third magnetic portion forming an outer magnetic gap with the second magnetic portion, and the third magnetic portion is provided with a leakage channel in communication with the outer magnetic gap and the leakage hole; the upper voice coil is inserted into the inner magnetic gap, and the lower voice coil is inserted into the outer magnetic gap; and avoidance holes for avoiding the framework are provided on the clamping plate.
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Inventors:
LINGHU RONGLIN (CN)
XIAO BO (CN)
ZHANG TONG (CN)
XIAO BO (CN)
ZHANG TONG (CN)
Application Number:
PCT/CN2020/078761
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:
H04R9/06
Foreign References:
| CN206640782U | 2017-11-14 | |||
| CN205051866U | 2016-02-24 | |||
| US10469951B2 | 2019-11-05 |
Attorney, Agent or Firm:
SHENZHEN ZICHEN INTELLECTUAL PROPERTY AGENCY LIMITED (CN)
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