Control key multiple electrical contact switching device
US5498843A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 17, 1994 |
| Grant date | Mar 12, 1996 |
| Priority date | — |
| Expiry date | May 17, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2025/046
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A control key device includes a casing having a generally dome-shaped portion provided at an arbitrary part of the casing, the dome-shaped portion having a top surface and a hole provided at a central part of the dome-shaped portion, a substrate provided within the casing and having a plurality of electrical contacts, a resilient member provided on the substrate and having a plurality of bulges at positions corresponding to the electrical contacts of the substrate, each of the bulges having an electrically conductive portion which makes electrical contact with a corresponding one of the electrical contacts when the bulge is resiliently deformed, a contact pressing member provided on the resilient member and having a plurality of legs at positions corresponding to the bulges of the resilient member, and a key secured on the contact pressing member via the hole in the dome-shaped portion of the casing, the key having a home position and a tilted position. One of the legs of the contact pressing member resiliently deforms a corresponding one of the bulges of the resilient member to achieve electrical contact between the electrically conductive portion of the corresponding one bulge an…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.