Direction control key assembly
US5294121A · kind A · utility
27Cited by
5References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 14, 1993 |
| Grant date | Mar 15, 1994 |
| Priority date | — |
| Expiry date | Jun 14, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0338
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A direction control key assembly comprises a base on which a cover is mounted to provide an interior space for receipt of a circuit board therein which has at least four switch units thereon respectively designating a specific direction. A button member is supported on the cover by a ball joint and has four pins depending therefrom respectively corresponding to the switch units such that when the button member is rotated with respect to the ball joint to allow one of the pins to engage and thus close the corresponding one of the switch units. A direction signal associated with the closed switch is thus generated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.