Insert earphone
US6931142B2 · kind B2 · utility
25Cited by
1References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 28, 2002 |
| Grant date | Aug 16, 2005 |
| Priority date | — |
| Expiry date | Jun 22, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R1/1016
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An insert earphone which prevents a sound leakage and improves wearing comfort. An ear chip has a barrel portion and first and second annular flange portions having the shape of a parabola spreading from the top toward the middle and from the middle toward the base of the barrel portion respectively. The first annular flange portion has a smaller outer diameter than the second annular flange portion. The first annular flange portion has almost even thickness from the inner circumference to the outer circumference, and has the inner circumference neighborhood substantially formed in the shape of a sliced doughnut.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.