| 摘要 |
PROBLEM TO BE SOLVED: To provide an endoscope in which an observation failure caused by halation and an observation failure caused by abrasion of an insertion portion may be prevented with a diameter of the insertion portion reduced. SOLUTION: An endoscope comprises: a tip covering member in a circular outer shape having a through-hole 5h coaxial with a central axis thereof; a lens frame 6 including a thick portion 6a having a diameter the same as an inner diameter of the through-hole 5h and inserted in the through-hole 5h, a frame through-hole 6h coaxial with a central axis of an outer shape of the thick portion 6a, and a light guide setting recess having an arc-shaped bottom face centering the central axis of the thick portion 6a disposed on one side of a horizontal line perpendicular to an optical center of a lens 11; a light guide handle 7 including a bundle of optical fibers and a light guide tip portion having, on a tip side thereof, an inner circumferential face disposed on the arc-shaped bottom face of the lens frame 6 and an outer circumferential face; and a drop preventing mechanism part for preventing the lens frame 6 inserted in the tip covering member from dropping out. COPYRIGHT: (C)2012,JPO&INPIT |
