US 12,629,007 B2 · Insertion-instrument bending operation mechanism and insertion instrument

Abstract

A bending operation mechanism includes a bending operation member configured to bend a bending portion, a wire pulling member configured to rotate along with rotation of the bending operation member, a lock operation member supported to a rotational axis, a cam member having a cam surface and integrally provided with the lock operation member, and a brake member having a cam follower surface capable of sliding relative to the cam surface. The cam member moves along with rotation of the lock operation member. The brake member moves in a direction in which a contact surface contacts a circumference of the wire pulling member as the cam follower surface slides on the cam surface in accordance with movement of the cam member.

Claims20

Dependent claims

An operation body for use with an insertion-instrument, the operation body comprising:

a pulley having a first outer circumferential surface, the pulley configured to rotate about a rotational axis to bend a bending portion;
a lock operation member configured to rotate about the rotational axis, the lock operation member comprising a cam having a cam surface positioned radially outside the first outer circumferential surface;
and
a brake member having an inner circumferential brake surface disposed between the first outer circumferential surface and the cam surface;
wherein when the cam surface is rotated, the inner circumferential brake surface is configured to move into direct contact with the first outer circumferential surface of the pulley along a circumferential length of the inner circumferential brake surface to restrict rotation of the pulley.

2 more elements

Dependencies are inferred from the claim text.

Insertion-instrument bending operation mechanism and insertion instrument

Life of this patent

Insertion-instrument bending operation mechanism and insertion instrument

Life of this patent

Abstract

Claims20