Bridge structure for keyboards
US6642466B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 21, 2002 |
| Grant date | Nov 4, 2003 |
| Priority date | — |
| Expiry date | Apr 6, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H3/125
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An improved bridge structure for keyboards consists of a first linkage element and a second linkage element pivotally engaging with each other. The first linkage element and second linkage element have respectively a pivotal trough which have respectively a pivotal trough slant surface section on the bottom section, and an axle which have respectively an axle slant surface section on the bottom section. The two slant surface sections intersect to form a fulcrum. The fulcrums remain stationary at the center to serve as the circle center of movements such that moving tolerances are unchanged when the key cap is depressed downwards. And the movements are performed based on the stationary center points which support and transfer forces in sideward directions to reduce sideward inclination and shaking.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.