VIBRATION MEMBER USING ELECTRO-MECHANICAL ENERGY CONVERSION ELEMENT AS DRIVING SOURCE, VIBRATION WAVE DRIVING APPARATUS USING VIBRATION MEMBER AS DRIVING SOURCE AND APPARATUS PROVIDED WITH VIBRATION WAVE DRIVING APPARATUS
US6674217B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 26, 2000 |
| Grant date | Jan 6, 2004 |
| Priority date | — |
| Expiry date | Jul 26, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02N2/106
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
There is disclosed a vibration member comprising: a driving portion; an elastic member including the driving portion; and an electro-mechanical energy conversion element as a driving source in contact with the elastic member. The electro-mechanical energy conversion element is provided with an alternating signal to generate a plurality of vibrations, and the plurality of vibrations are combined to generate a driving vibration in the driving portion. An ununiformity of rigidity of the vibration member caused by a polarization treatment performed on the electro-mechanical energy conversion element is offset by partially changing the rigidity of the vibration member, so that a stable driving vibration of the vibration member can be outputted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.