Push button switch including dome-shaped movable contact having reverse function
US6271491A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 4, 2000 |
| Grant date | Aug 7, 2001 |
| Priority date | — |
| Expiry date | May 4, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2205/03
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A dome-shaped movable contact having a reverse function used in a push button switch is disclosed, wherein it is possible that the movable contact comes into contact with a fixed contact at position excluding the central portion thereof where dust is liable to gather, obtains high contact reliability, has good feeling in manipulation and is excellent in an intimate contact property with a sheet member covering the movable contact. The push button switch includes fixed contacts, a dome-shaped movable contact disposed above the fixed contacts, and a projection formed on the inner surface of the movable contact at a portion excluding a dome-shaped apex portion so as to be in contact with and separated from one of the fixed contacts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.