Axial load resistant key switch
US4803321A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 16, 1987 |
| Grant date | Feb 7, 1989 |
| Priority date | — |
| Expiry date | Nov 16, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2215/014
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A short travel key switch comprising an electrically insulating base having a bottom and a cylindrical lateral wall defining a cavity closed by a cap. A central contact and a lateral contact are mounted on the bottom. The periphery of a switching element received in the cavity is in electrical contact with the lateral contact. The element is elastically yieldable to establish an electrical connection between the two contacts in response to an axial load exerted on its convex face by the facing portion of an actuator. The central contact is mounted flush with a plane central portion of the bottom. The facing portion of the actuator which engages the central contact is flat.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.