Vibration type motor and driver apparatus
US11522471B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 4, 2020 |
| Grant date | Dec 6, 2022 |
| Priority date | — |
| Expiry date | Jun 23, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02N2/0055
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A vibration type motor has a vibrator; a frictional member, a pressurization unit that causes the vibrator and the frictional member to come into pressure-contact with each other, a retaining member that retains the frictional member, and a fixing unit that fixes the friction member to the retaining member, and the vibrator and the frictional member make relative movement by the vibrator being vibrated. The frictional member has a first area including an area that contacts the vibrator and a second area including an area that is retained by the retaining member. A size of the first area in an orthogonal direction that is orthogonal to both the direction of the relative movement and a pressure direction of the pressurization unit is smaller than a size of the second area in the orthogonal direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.