Key structure
US8049125B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 22, 2008 |
| Grant date | Nov 1, 2011 |
| Priority date | — |
| Expiry date | Jan 15, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2225/022
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A key structure including at least two protruding keys and a key frame is provided. The at least two protruding keys are arrayed adjacently. Each of the at least two protruding keys has a first side edge, a second side edge and a protrusion. The second side edge is opposite to the first side edge. The protrusion has a curved-convex surface, a first side surface and a second side surface. The curved-convex surface is getting protruding inwardly from the first side edge and the second side edge. The top end of the curved-convex surface has a crest line. The first side surface passes through the end points of the first side edge, the second side edge and the crest line in the same side. The second side surface is opposite to the first side surface. The key frame is used for carrying the at least two protruding keys.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.