Earphone including tuning means
US11218793B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 25, 2020 |
| Grant date | Jan 4, 2022 |
| Priority date | — |
| Expiry date | Mar 21, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R1/1083
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An earphone includes a housing, a speaker unit disposed in the housing, a cover coupled with the housing and including a nozzle, a first space portion disposed in front of the speaker unit, and a second space portion disposed in the rear of the speaker unit and partitioned off from the first space portion. Here, the speaker unit includes a cylindrical yoke with an open top, a magnet fixed to a bottom surface of an inside of the yoke, a plate fixed to a top surface of the magnet, a voice coil disposed between an inner circumference of the yoke and outer circumferences of the magnet and the plate, a vibration plate disposed above the plate and to which the voice coil is fixed, a cap coupled with the yoke, and a frame coupled with the yoke and the cap.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.