ENDOSCOPE AND CYLINDRICAL STRUCTURE FOR ENDOSCOPE

摘要

An endoscope includes a cylindrical member, a first outward flange including a first cutout, a projection projecting inward from an internal circumferential surface of a hole formed in a distal end portion of an insertion section of the endoscope, and capable of being engaged with the first cutout, an elastic member to urge the cylindrical member toward a bottom portion of the hole, and a projecting portion formed to project from the internal circumferential surface of the hole and including a surface facing the bottom portion of the hole.

主权项

1. An endoscope comprising:
a cylindrical member inserted into a hole formed in a distal end portion of an insertion section from an opening of the hole toward a bottom portion of the hole, and disposed in the hole; a first outward flange provided on an external circumferential surface of the cylindrical member, and including a first cutout portion; a protection projecting inward in a radial direction from an internal circumferential surface of the hole, and capable of being engaged with the first cutout portion; an elastic member provided on the external circumferential surface of the cylindrical member and on a side closer to the opening than the first outward flange is, the elastic member being elastically deformable to urge the cylindrical member toward the bottom portion of the hole; and a projecting portion formed to protect from the internal circumferential surface of the hole and on a side closer to the opening than the projection is, the projecting portion being get over by the elastic member elastically deformed when the elastic member is moved together with the cylindrical member from the opening toward the bottom portion, and including a surface abutting against the elastic member in a state in which the first cutout portion is engaged with the projection, the surface facing the bottom portion of the hole.