Driving apparatus using transducer
US5589723A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 15, 1995 |
| Grant date | Dec 31, 1996 |
| Priority date | — |
| Expiry date | Mar 15, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02N2/025
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A driving apparatus using a transducer. The apparatus comprises an electro-mechanical transducer, a driving shaft, a moving member and a pushing member. The driving shaft is coupled with the electro-mechanical transducer; the moving member is pushed against the driving shaft for frictional coupling therewith, the pushing member being interposed between the driving shaft and the moving member. The moving member is connected with the target moving object such as a lens mechanism. In operation, the electro-mechanical transducer is fed with driving pulses of a frequency of at least 18 kHz so that the transducer and the driving shaft will be displaced slowly in one direction and rapidly in the opposite direction, whereby the moving member coupled frictionally with the driving shaft is driven axially in a reciprocating manner at two different velocities. Repeating these operations allows the moving member to move slowly in the same axial direction in which the driving shaft is driven, whereby the lens mechanism or the like connected to the moving member is moved up to the desired position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.