Key switch
US6040541A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 4, 1999 |
| Grant date | Mar 21, 2000 |
| Priority date | — |
| Expiry date | May 4, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H3/125
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A key switch includes a base, a circuit board, a retaining board, a rubber spring, a support linkage and a key cap. A first engaging mechanism and a second engaging mechanism are formed on the base. The circuit board is positioned above the base and comprises a switch electrode. The rubber spring is positioned on the circuit board. The support linkage is engaged with the base, having a first link and a second link pivotably attached together. A pair of engaging pins of the first link engage with the base, and a pair of arcuate faces is formed on the base proximate the engaging pins. A sliding link is formed on the second link to engage with the second engaging mechanism. The key cap engages with the support linkage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.