Patent ID: 6447445
Filing Date: 2002-09-10
Classification: A61B

Abstract:
An insertion instrument for an endoscope which comprises:a hard end portion; an illuminating means fixed to said hard end portion having at least an illuminating lens attached within an illuminating lens barrel and a light guide having an emitting end for facing said illuminating lens; an observing means fixed to said hard end portion having at least an objective optical system disposed within an objective lens barrel; said hard end portion being divided into a holding member and a cover member detachably fitted to said holding member; concave shaped recesses provided between said holding member and said cover member for inserting at least said illuminating lens barrel and said objective lens barrel from an outer periphery of said holding member inwardly in the radial direction, wherein said recesses have arc shaped portions to substantially coincide with outer diameters of said illuminating lens barrel and said objective lens barrel; and detachable positioning means for positioning said illuminating lens barrel and said objective lens barrel in said recesses in the axial direction.