Keyboard switch
US5430267A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 1, 1993 |
| Grant date | Jul 4, 1995 |
| Priority date | — |
| Expiry date | Dec 1, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2235/016
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In a keyboard switch that switches on and off by sliding a key stem, the key stem is slidably inserted in a key stem sleeve that is integral with the housing of the keyboard switch. The key stem comprises a sliding member integrally formed therewith and a keytop support whose shape is a wide flange formed integrally with and projecting outwardly from the outer periphery of the sliding member. An elastic hollow cylinder has one end hermetically joining the lower face of the keytop support and its other end hermetically joining the outer periphery of the key stem guide sleeve. With this structure, there can be no gap between the sliding member and the keytop support, so the interior of the keyboard switch is kept completely free from dust and moisture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.