An endoscope eyepiece grasping mechanism comprising:
- a base part comprising a base portion with a radially inward light passage and an outer surface and a base part arcuate wall portion disposed radially outward of the light passage, the base part arcuate wall portion extending axially from the base portion and extending a circumferential distance between base part arcuate wall portion circumferential ends and defining a base part arcuate wall portion wall opening between the base part arcuate wall portion circumferential ends;
- a rotatable part with a radially inward surface, the rotatable part comprising an annular portion, and a rotatable arcuate wall portion including an axial surface extending axially from the annular portion, the axial surface including a coupling edge, the rotatable part including a radial surface extending radially inwardly from the axial surface to the coupling edge, the rotatable arcuate wall portion extending a circumferential distance between rotatable part arcuate wall portion circumferential ends and defining a rotatable part arcuate wall opening between the rotatable arcuate wall portion circumferential ends;
- a path guide formed between the base part and the rotatable part for guided movement of the rotatable part relative to the base part for moving the rotatable arcuate wall portion relative to the base part between an open state and a closed state,
- the opened state positioning the rotatable part arcuate wall opening and the base part arcuate wall portion wall opening at least partially overlapping to define an eyepiece receiving spacing and the open state positioning the radial surface of the rotatable part spaced from the base portion by a first axial distance,
- the closed state positioning the rotatable part arcuate wall opening and the base part arcuate wall portion wall opening not overlapping or overlapping to an extent to provide a gap that is smaller than the eyepiece receiving spacing and the closed state positioning the radial surface spaced from the base portion by a second axial distance, which second axial distance is smaller than said first axial distance;
- and
- a biasing device configured to bias the rotatable part toward the closed state.