Piezoelectric linear motor offering enhanced displacement
US8283838B2 · kind B2 · utility
Assignees
Inventor
Key dates
| Filing date | Apr 11, 2007 |
| Grant date | Oct 9, 2012 |
| Priority date | — |
| Expiry date | Feb 13, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N30/2048
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A piezoelectric linear motor for providing enhanced displacement using a dome-shaped piezoelectric ceramic is provided. The piezoelectric linear motor includes a dome-shaped piezoelectric ceramic (100) processed such that different electrodes are formed on opposite surfaces of the piezoelectric ceramic. A vibration shaft (200) is fixed to a first surface of the piezoelectric ceramic so that the vibration shaft moves in conjunction with displacement of the piezoelectric ceramic. A movable element (300) is linearly driven through friction with the vibration shaft while coming into contact with the vibration shaft. The movable element moves in a movement direction of the vibration shaft if the inertial force of the movable element is less than the frictional force between the movable element and the vibration shaft when the vibration shaft moves. According to the present invention, the piezoelectric ceramic is formed in a dome shape, so that movement displacement is enhanced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.