The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 23, 2022
Filed:
Apr. 21, 2021
Bujeon Co., Ltd., Ansan-si, KR;
Minkoo Park, Hwaseong-si, KR;
Seungcheol Lee, Ansan-si, KR;
BUJEON CO., LTD., Ansan-si, KR;
Abstract
The present invention provides a duct structure of an earphone speaker unit comprising: a diaphragm; a speaker module located at a back of the diaphragm, comprising an acoustic coil, a magnet, and a yoke, and generating sound of the diaphragm, and a frame member surrounding the yoke, wherein the frame member forms a donut-shaped duct space along circumference of the yoke, and wherein the frame member comprises: an inflow hole formed to enable sound generated from the speaker module to flow into the duct space; an outflow hole formed to enable sound inside the duct space to flow out to the outside; a partition wall blocking a path of sound in a vertical direction inside the duct space; a tuning hole formed to penetrate through the partition wall; and a mesh member installed to block the tuning hole, thereby enabling acoustic tuning.