Vibration actuator and drive unit including the same
US7642696B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 8, 2008 |
| Grant date | Jan 5, 2010 |
| Priority date | — |
| Expiry date | Jul 30, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N30/88
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An ultrasonic actuator includes an actuator body, a case and a support rubber. The support rubber is made of conductive rubber having alternately stacked insulating layers and conductive layers and arranged between the case and the actuator body such that an external electrode and an electrode is brought into conduction and applies in advance a compressive force in the direction of longitudinal vibration to the actuator body at a non-node part of the vibration of the actuator body. The support rubber is arranged such that the stacking direction of the conductive rubber intersects with a plane including the direction of longitudinal vibration and the direction of bending vibration of the actuator body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.