Sliding finger plate focus adjusting device for a binocular
US4240690A · kind A · utility
Assignees
Inventor
Key dates
| Filing date | Jan 15, 1979 |
| Grant date | Dec 23, 1980 |
| Priority date | — |
| Expiry date | Jan 15, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B7/06
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A focus adjusting device for a binocular which is constructed with a pair of object lens barrels, a pair of ocular lens barrels slidably fitted in the objective lens barrels, brackets for connecting the pairs of the object lens barrels and the ocular lens barrels, a hollow cylindrical shaft, on which the brackets are centrally hinged, a back-and-forth moving shaft inserted concentrically into the hollow cylindrical shaft, a seat member in a semi-circular shape, through which the outer peripheral surface of the hollow cylindrical shaft pierces, the seat member having a flattened platform, a finger plate member slidably fitted on the top flattened platform of the seat member to move left and right directions, each of the cylindrical shaft, the back-and-forth moving shaft, and the finger plate member having a long hole, through which a single pin studded upright from the back-and-forth moving shaft passes, the long hole in the finger plate member being formed slantly so that when the finger plate member is moved left-and-right direction, the upright pin causes the ocular lens barrels to move back and forth with the back-and-forth moving shaft to perform focus operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.