Two-stage switch apparatus
US7952038B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 4, 2009 |
| Grant date | May 31, 2011 |
| Priority date | — |
| Expiry date | Dec 7, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2201/036
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A two-stage switch apparatus includes: a PCB including first and second electrodes; a conductive dome disposed on the PCB; an insulating film covering a surface of the conductive dome on a side opposite to the PCB, and third and fourth electrodes above the conductive dome; and a button actuator provided over a side of the insulating film, which is opposite the PCB. The button actuator includes a conductive elastic body protruding to the side of the insulating film at positions corresponding to both the third and fourth electrodes. An analog portion is formed by the conductive elastic body, the third electrode and the fourth electrode, when the conductive elastic body contacts both the third and fourth electrodes. A digital portion is formed by the conductive dome and the second electrode, when the button actuator is pressed and the conductive dome is indented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.