Membrane switch and production method thereof
US6344623B1 · kind B1 · utility
14Cited by
16References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 2, 2000 |
| Grant date | Feb 5, 2002 |
| Priority date | — |
| Expiry date | Mar 2, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2227/032
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A membrane switch comprising a pair of electrode plates and a spacer separating the plates, wherein the operating force required to operate the membrane switch by pressing it with a rod having a hemispherical tip with a radius of curvature of 5 mm is within the range of 0.03 to 0.2 kg. The spacer is in the form of a film, the film has through holes, and the aperture ratio of the through holes is 50% or above. The effect is that a membrane switch exhibiting no malfunction, negligible variation in the operating force, and excellent in durability can be obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.