Duct structure of earphone speaker unit
US11425488B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 21, 2021 |
| Grant date | Aug 23, 2022 |
| Priority date | — |
| Expiry date | Apr 21, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R9/06
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.