Vibration actuator
US7851972B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Feb 21, 2007 |
| Grant date | Dec 14, 2010 |
| Priority date | — |
| Expiry date | Feb 25, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N30/2027
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
It is an subject of the present invention to provide a vibration actuator in which a plurality of rotors can be driven by a single vibration unit.When a composite vibrator (2) is driven to generate a composite vibration combining a plurality of vibrations, a first stator (3) and a second stator (4) vibrate, thereby causing elliptical movements in corner portions (8) and (9) of the first stator (3) and the second stator (4), respectively. As a result, a first rotor (A) abutting onto and pressurized against the corner portion (8) of the first stator (3) and a second rotor (B) abutting onto and pressurized against the corner portion (9) of the second stator (4) are rotated at the same time. Further, in this case, by selecting vibration modes of the plurality of vibrations constituting the composite vibration, the two rotors (A) and (B) can be rotated in the same direction or in opposite directions with respect to each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.