Key switch structure
US8569640B2 · kind B2 · utility
31Cited by
7References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 28, 2009 |
| Grant date | Oct 29, 2013 |
| Priority date | — |
| Expiry date | May 28, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49105
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A key switch structure is provided whose waterproofing property is improved without affecting a contact of a membrane sheet. The upper surfaces of the membrane sheet, the embossed part and the circumferential bend part of a back plate are formed on one and the same plane, and a thermal sheet is welded to those upper surfaces. The thermal sheet comprises a thermally meltable, adhesive sheet, which will be heated and pressed with heat rollers to be welded to the upper surfaces. The back plate has an air vent hole formed in its bottom portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.