Patent ID: 11944266
Assignee: OLYMPUS CORPORATION
Field: Medical technology (Instruments)
Classification: CPC A  G | IPC A

Claim 6:
7. An endoscope comprising:
an operation section comprising a first holder, the first holder comprising an inner circumferential wall;
an insertion section located distally relative to the operation section, the insertion section comprising a second holder located inside the insertion section;
a first cylinder comprising:
a first distal end attached to the second holder; and
a first proximal end attached to the first holder;

a second cylinder located inside the first cylinder; the second cylinder comprising:
a second distal end; and
a second proximal end spaced apart from the first holder in a longitudinal direction of the first cylinder;

a movable base located inside a distal end side of the insertion section and configured to change an orientation of a distal end side of a treatment instrument inserted into the insertion section; and
a wire inserted into the second cylinder and coupled to the movable base, the wire configured to be advanced or retracted,
wherein a first difference between a first inner diameter of the second cylinder and a second inner diameter of the inner circumferential wall is larger than a second difference between a third inner diameter of the first cylinder and an outer diameter of the second cylinder.