Push button switch assembly including single or plural sequentially closed switches
US5313027A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 12, 1993 |
| Grant date | May 17, 1994 |
| Priority date | — |
| Expiry date | Mar 12, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2225/018
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A push switch is capable of performing a first switching operation and subsequently a second switching operation when a pressing force is applied to the switch. The push switch includes (a) an insulating membrane having at least one dome with at least a portion thereof overlaid by or serving as an inner conductor and at least a portion of its outer periphery overlaid by or serving as an outer conductor, (b) an insulating substrate having thereupon an inner pole contact disposed at a position opposing to the inner conductor and an outer pole contact disposed at a position opposing to the outer conductor, respectively, and (c) a spacer placed between the insulating membrane and the insulating substrate for spacing the conductor apart from the pole contacts during the time when no pressing force is applied to the switch. When a light pressing force is applied to the dome, the outer conductor will first come in contact with the outer pole contact causing a first switching operation to take place, and subsequently with a further pressing, the inner conductor will come in contact with the inner contact causing a second switching operation to take place.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.