Sensing keys for keyboard
US6999009B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 27, 2002 |
| Grant date | Feb 14, 2006 |
| Priority date | — |
| Expiry date | Apr 29, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2239/052
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A key sensing device comprises a first conductive contact and a second conductive contact spaced from one another by a low-force spacer element which includes a low-force aperture disposed between the first conductive contact and the second conductive contact. A third conductive contact and a fourth conductive contact are spaced from one another by a high-force spacer element which includes a high-force aperture disposed therebetween. The low-force aperture and the high-force aperture are configured to be aligned with a keyboard key so that a pressing of the keyboard key with a sufficient force causes contact between the first conductive contact and the second conductive contact through the low-force aperture and contact between the third conductive contact and the fourth conductive contact through the high-force aperture. The low-force aperture is larger in size than the high-force aperture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.