Title:
LOUDSPEAKER BOX
Document Type and Number:
WIPO Patent Application WO/2021/128008
Kind Code:
A1
Abstract:
Provided by the present utility model is a loudspeaker box. A sound generating unit separates an accommodating space into a front cavity and a rear cavity. A retaining wall separates the rear cavity into a first rear cavity and a second rear cavity. A lower cover comprises a lower cover body, a convex wall, a through hole, supporting steps and a cover plate, wherein the lower cover body and the convex wall jointly enclose a sound guide groove, and the sound guide groove communicates with the second rear cavity; the through hole connects the first rear cavity with the sound guide groove; two supporting steps are arranged at an interval on two opposite sides of the through hole; the cover plate completely covers the through hole; an air-permeable spacer is attached to the convex wall and completely covers the sound guide groove, sound-absorbing particles are filled in the second rear cavity, and the air-permeable spacer encapsulates the sound-absorbing particles in the second rear cavity so as to form a virtual sound cavity; and an air flow in the first rear cavity bypasses the retaining wall, then sequentially passes through the through hole and the sound guide groove and enters the second rear cavity by means of the air-permeable spacer, and the two supporting steps are located on the two opposite sides of the through hole parallel to the flowing direction of the air flow, respectively. Compared to related technology, the loudspeaker box of the present utility model has an excellent low-frequency acoustic performance.
Inventors:
GAO SHANG (CN)
WANG CHENGLIANG (CN)
ZENG YUE (CN)
WANG CHENGLIANG (CN)
ZENG YUE (CN)
Application Number:
PCT/CN2019/128003
Publication Date:
July 01, 2021
Filing Date:
December 24, 2019
Export Citation:
Assignee:
AAC ACOUSTIC TECH SHENZHEN CO LTD (CN)
AAC TECHNOLOGIES PTE LTD (SG)
AAC TECHNOLOGIES PTE LTD (SG)
International Classes:
H04R9/06; H04R1/22; H04R1/28
Foreign References:
| CN109218897A | 2019-01-15 | |||
| CN206433106U | 2017-08-22 | |||
| CN108235195A | 2018-06-29 | |||
| CN108307279A | 2018-07-20 | |||
| US20190349669A1 | 2019-11-14 | |||
| CN108124225A | 2018-06-05 | |||
| CN104994461A | 2015-10-21 |
Attorney, Agent or Firm:
GUANGDONG GUANGHE LAW FIRM (CN)
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