Focussing mechanism for biaxial binoculars - has displaceable focussing shaft between right and left binocular tubes fixed to both ends of baseplate

摘要

The baseplate (1) of the focussing mechanism has an axial hole parallel to the direction of the optical axis. A cutout section (4) on the top of the baseplate has in the middle a slot connected to and parallel with the axial hole. A centre shaft with a ridge (6) is inserted to be displaced in the axial hole and a pin projecting on the shaft protrudes out of the slot and fits together with a cam recess on the back of a sliding plate (9). Twin projecting edges prevent the plate from slipping out and are masked by a cover. plate.