Clutch apparatus for zoom lens barrel
US5701208A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 6, 1995 |
| Grant date | Dec 23, 1997 |
| Priority date | — |
| Expiry date | Oct 6, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B7/10
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A driving apparatus for a zoom lens barrel has a driving ring for moving a lens system and a mechanism for movably supporting the driving ring for movement along an optical axis of the lens system. A gear train is supported by the supporting mechanism, a power source is provided in a camera body, and a mechanism for transmitting torque generated by the power source to the driving ring is provided. The torque transmitting mechanism includes the gear train, and a mechanism for disconnecting the torque transmission path from the power source to the driving ring if a torque above a predetermined value is applied to the driving ring. The disconnection mechanism is disposed in the gear train and is supported by the supporting mechanism.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.