Endoscope

Abstract

The purpose of the present invention is to provide an endoscope that efficiently and reliably achieves a stronger pulling force. The endoscope is thus provided with: a drive part (12) that generates a drive force that bends a bending section (2b); a C-ring-shaped member (9) that is capable of frictionally engaging with a pulley (11), and has a notched section (9c) in part of the ring-shaped member; an operation input member (5) that performs a bending operation on the bending section (2b); an operation input-side pulling member (8a) that serves as a first pulling member that winds around the C-ring-shaped member and extends from the C-ring-shaped member toward the operation input member, and is connected to the operation input member in such a manner as to straddle the notched section from a position extending toward the operation input member of the C-ring-shaped member and coil around the C-ring-shaped member such that the coiling around distance decreases with an increase in the operation amount of the operation input member; and a bending section-side pulling member (8b) that serves as a second pulling member that winds around the C-ring-shaped member and extends from the C-ring-shaped member toward the bending section, and is connected to the bending section in such a manner as to straddle the notched section from a position that extends toward the bending section on the C-ring-shaped member without coiling around the C-ring-shaped member.

Description

technical field [0001] The present invention relates to an endoscope that can receive assistance from the driving force of a drive unit to move the traction member provided on the operation part by performing a tilting operation to change the tilting direction and tilting angle of the operation member provided on the operation part. The upper bending part performs the bending operation. Background technique [0002] In recent years, endoscopes having elongated insertion portions have been used in the medical and industrial fields. In an endoscope in the medical field, observation and the like can be performed by inserting an insertion portion into the body from the oral cavity, anus, or the like. On the other hand, in an endoscope in the industrial field, it is possible to perform observation or the like by inserting an insertion portion into a pipe of mechanical equipment such as a boiler or inside an engine. [0003] Generally, in an endoscope, an observation optical sys...

AI Technical Summary

Problems solved by technology

[0009] However, in the conventional endoscopes disclosed in JP-A-2003-325437 and JP-A-2009-5836, etc., as a means for obtaining a stronger pulling force, there is a problem that even if the Only by increasing the winding angle of the pulling wire to the C-ring, sometimes the rotation amount adjustment mechanism of the C-ring does not function well, and sometimes the necessary pulling force cannot be obtained.

As a result, the annular member is deformed, and the close contact state between the inner surface of the annular member and the outer peripheral surface of the pulley is not uniform, and it may be difficult to obtain sufficient resistance.

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