Electromagnetic mode change of peripheral interface wheel
US10726984B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 31, 2019 |
| Grant date | Jul 28, 2020 |
| Priority date | — |
| Expiry date | May 31, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F7/0205
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A user input device including a rotary input control having a wheel and an electropermanent magnet (EPM) assembly, the EPM assembly comprising a permanent magnet and a magnetizing assembly configured to control a polarization of the permanent magnet to transition the electropermanent magnet assembly from a first state in which the EPM assembly applies a first resistance profile to the wheel and a second state in which the EPM assembly applies a second resistance profile to the wheel. The EPM assembly includes magnetically conductive members positioned at opposing ends of the electropermanent magnet, each magnetically conductive member comprising a respective plurality of teeth protruding radially toward the wheel, and each of the magnetically conductive members comprising a respective magnetic pole depending on a polarized state of the EPM assembly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.