Endoscope

Abstract

Provided is an endoscope, comprising: a balloon injection channel; a first aperture part which is opened within a manipulation part; a connection tube (50) having a second aperture part (50k) which communicates with the first aperture part and having a notch (50s); a balloon metal cap (52); a branch channel connection unit (56) which retains a first end part of the balloon metal cap (52), and which further comprises a rotation regulation part (55d) which is a protrusion which engages with the notch (50s); and an anchor member (63) which anchors the branch channel connection unit (56) to the connection tube (50).

Description

technical field [0001] The present invention relates to an endoscope having, in an operating portion, a branch channel communicating with a first opening of a main shaft channel. Background technique [0002] A structure in which a tubular spindle channel is provided inside an insertion portion inserted into a subject of an endoscope and inside an operation portion connected to a proximal end of the insertion portion in the insertion axis direction is known. [0003] In addition, examples of the main shaft channel include a treatment instrument penetration channel for supplying a treatment tool into a subject, a balloon water injection channel for supplying an ultrasonic transmission medium to a balloon provided in an insertion portion of an ultrasonic endoscope, and the like. [0004] The main shaft passage has a first opening opening inside the operation part, and a first end part of a tubular branch passage is communicated with the first opening part, and a second end par...

AI Technical Summary

Problems solved by technology

[0009] In this case, slack is generated in the branch passage fixing portion, and there is a problem that it is difficult to ensure liquid-tightness at the communicating portion between the first end portion of the branch passage and the first opening of the main shaft passage.

[0010] Here, also in the structure of Japanese Patent Application Laid-Open No. 2010-207424, if the insertion part is twisted relative to the operation part, etc., an impact force is applied to the branch passage and the first opening of the main shaft passage and the first end of the branch passage are hit. If an impact force is also applied to the connecting parts between the parts, there is a problem that it is difficult to ensure the liquid tightness of the connecting parts.

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