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1. (WO2018220919) INSERTION DEVICE

Pub. No.:    WO/2018/220919    International Application No.:    PCT/JP2018/007269
Publication Date: Fri Dec 07 00:59:59 CET 2018 International Filing Date: Wed Feb 28 00:59:59 CET 2018
IPC: A61B 1/008
A61B 1/005
A61B 1/31
G02B 23/24
Applicants: OLYMPUS CORPORATION
オリンパス株式会社
Inventors: ARAKI Kohei
荒木 康平
Title: INSERTION DEVICE
Abstract:
An endoscope (1) serving as an insertion device has an insertion portion (2) to be inserted into a subject in a longitudinal direction from the distal end side thereof. The insertion portion (2) has: a distal end portion (11); a bending portion (14) that is provided on the base end side of the distal end portion and is bent in a first direction in response to the bending operation of an operator; a passive bending portion (15) that serves as a first flexible tubular portion, is provided on the base end side of the bending portion (14), and is not bent in response to the bending operation of the operator but is passively bent by receiving external force; and a corrugated tube (13) that serves as a second flexible tubular portion and is provided on the base end side of the passive bending portion (15). The flexural rigidity of the passive bending portion (15) in a first direction is higher than that in a second direction orthogonal to the first direction.