Keyswitch with adjustable tactile feedback and switch thereof
US10079601B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 29, 2017 |
| Grant date | Sep 18, 2018 |
| Priority date | — |
| Expiry date | Jun 29, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/96077
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A keyswitch includes a base having a pillar, a cap having a rib and movable relative to the base, a sleeve rotatably sleeving the pillar and having first and second top surfaces and convex and concave portions, an elastic member abutting against the sleeve and the base, and a resilient arm abutting against a first or second position on the convex portion with rotation of the sleeve. When the resilient arm abuts against the first position, the rib abuts against the first top surface to prepress the elastic member for generating a first preload. When the cap is pressed for moving the sleeve downward, the resilient arm moves from the first or second position to the concave portion. When the resilient arm abuts against the second position, the rib abuts against the second top surface to prepress the elastic member for generating a second preload larger than the first preload.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.