Keyboard structure of personal digital assistant (PDA)
US6614649B1 · kind B1 · utility
27Cited by
5References
4Claims
0Family size
Inventor
Key dates
| Filing date | Sep 14, 2000 |
| Grant date | Sep 2, 2003 |
| Priority date | — |
| Expiry date | Oct 26, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2223/05
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The main structure of a keyboard of PDA includes a case, a key set, function keys, a circuit board, and a PDA support frame. The device is characterized in that the case opens to the left and to the right and is a rectangle that contains the key set. The key set has two parts fitted at the bottom of the case and on the inner side of the cover respectively. One of the parts can slide inside the case to integrate with the other part for easy operation. They can also be folded so that the case becomes smaller and convenient for carrying.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.