Mechanical ratchet system for a knob
US10140008B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 22, 2017 |
| Grant date | Nov 27, 2018 |
| Priority date | — |
| Expiry date | Jun 22, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2300/038
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A knob for an input device may include a knob housing being rotatable on an axis, a shaft coupled to and extending from the knob housing along the axis, a ratchet wheel axially coupled to the shaft and including a toothed perimeter, and a resistance wheel axially coupled to the shaft and including a smooth perimeter, where the ratchet wheel and the resistance wheel are rotatable on the axis in correspondence with a rotation of the knob housing. A biasing mechanism provides a force on its first end to cause a roller to engage with the toothed perimeter of the ratchet wheel such that a ratcheted rotation occurs when the knob housing is rotated, and further provides a force on its second end to cause the second end to engage with the smooth perimeter of the resistance wheel such that a friction is provided when the knob housing is rotated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.