Membrane switch device capable of ensuring bonding around mounting holes
US6043441A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 14, 1999 |
| Grant date | Mar 28, 2000 |
| Priority date | — |
| Expiry date | Sep 14, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2211/012
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A membrane switch is disclosed which comprises an upper sheet, a lower sheet disposed in an opposed relation to the upper sheet, and an insulating resist layer for pasting both upper and lower sheets with each other. The upper and lower sheets are respectively formed with plural contact portions and plural mounting holes in such a manner that the contact portions formed on the upper sheet side and the contact portions formed on the lower sheet side are opposed to each other and so are the mounting holes. The insulating resist layer comprises a first insulating resist layer formed on at least one of the upper and lower sheets except the portions where the contact portions are positioned and a second insulating resist layer formed on the first insulating resist layer at each of positions near the mounting holes so as to surround the whole circumference of each mounting hole. The insulating resist layer in the area where the second resist layer is formed is made thicker than in the other area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.