Keyboard
US5439304A · kind A · utility
93Cited by
9References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 22, 1993 |
| Grant date | Aug 8, 1995 |
| Priority date | — |
| Expiry date | Nov 22, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2217/028
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A keyboard assembly having keys which provide input signals to a processing unit includes a flexible printed circuit and underlying mat which enable the keyboard to be warped upward at its center by a system of cams which are driven by a controlled motor. Such warping induces rotation of the forearms of the user so as to have ergonomic value with respect to repetitive stress trauma.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.