Patent ID: 11882998
Assignee: FUJIFILM CORPORATION
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 0:
1. An endoscope comprising:
an operation section provided with an operating member;
an insertion section that is provided on a distal end side of the operation section and that is inserted into a subject;
a treatment tool erecting base provided at a distal end part of the insertion section;
a driven lever, comprising a beam, that is arranged to be exposed to outside of the operation section and that moves in association with an operation of the operating member;
a proximal end opening provided in the operation section;
a distal end opening provided in the distal end part;
an erecting operation wire channel that is provided in the insertion section and that causes the proximal end opening to communicate with the distal end opening;
an erecting operation wire that is inserted through the erecting operation wire channel, wherein a distal end side of the erecting operation wire is arranged outside the distal end opening, and the distal end side of the erecting operation wire is coupled to the treatment tool erecting base, a proximal end side of the erecting operation wire is arranged outside the proximal end opening and the proximal end side of the erecting operation wire is coupled to the driven lever, and the erecting operation wire is pushed or pulled in accordance with a movement of the driven lever to move the treatment tool erecting base; and
an attachment member, comprising a plate-shaped body, that is provided at a proximal end of the erecting operation wire and that is engaged with the driven lever in an attachable/detachable manner by a one-touch operation,
wherein the erecting operation wire has
a flexible long wire body, and
a plurality of gap filling members that is arranged at least a portion in an axial direction of the flexible long wire body and that is formed to have a diameter larger than an outside diameter of the flexible long wire body and smaller than an inside diameter of the erecting operation wire channel, wherein the plurality of gap filling members are peripherally surrounding the wire body,
wherein the plurality of gap filling members function as backflow prevention members that prevent a fluid from flowing backward from the distal end opening to the proximal end opening in the erecting operation wire channel.