Key switch and electronic device
US7126072B2 · kind B2 · utility
14Cited by
9References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 26, 2005 |
| Grant date | Oct 24, 2006 |
| Priority date | — |
| Expiry date | Aug 26, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/94068
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A jog dial switch, which functions as a key switch, includes a key sheet, a rotatable key top arranged on the key sheet, and a movement amount detector for detecting movement amount of the key top. The movement amount detector includes four permanent magnets arranged on the key top, three Hall elements, and an electric circuit for processing signals output from the Hall elements. The Hall elements and the electric circuit are arranged below the key sheet. The key sheet is formed by a water resistant material and covers the electric circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.