Endoscope Handle Assembly for Insertion Rotation Suppression
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Solution Overview
Problem
Existing endoscopes face issues with unintended rotation of the insertion portion due to friction between torque control members during assembly, leading to delayed assembly work and potential damage or early deterioration.
Innovation Solution
An endoscope design featuring a rotary cylindrical portion connected to an insertion portion, a cylindrical handle with a through hole, and a rotation suppression member that contacts the handle's bottom to suppress unwanted rotation through frictional resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a torque control member is provided between the operation-unit mouthpiece part and the insertion-unit mouthpiece part in the radial direction, then unintended rotation of the insertion portion is prevented, but friction occurs during assembly work causing delayed assembly and potential damage to the torque control member
Solution Approach 1:
A rotation suppression member is introduced as an intermediary component between the cylindrical handle and the rotary cylindrical portion. This mediator transmits rotational force from the cylindrical handle to the rotary cylindrical portion while preventing unintended rotation, thereby avoiding direct friction between the torque control member and mouthpiece parts during assembly.
Solution Approach 2:
The rotation suppression function is segmented from the torque control member and implemented as a separate rotation suppression member. This segmentation allows the torque control member to focus on its primary function of controlling rotational torque during operation, while the rotation suppression member handles the prevention of unintended rotation during assembly and operation.
2Reliability
If frictional resistance is increased to prevent unintended rotation, then rotation control is improved, but assembly work is delayed due to increased friction during engagement
Solution Approach 1:
The rotation suppression member acts as a mediator that provides the necessary frictional resistance for rotation control without creating excessive friction during assembly. By positioning this member to contact the bottom of the cylindrical handle rather than the mouthpiece parts, it enables rotation control while facilitating smoother assembly engagement.
3Stability of the object's composition
If the torque control member is positioned to prevent rotation, then insertion portion stability is improved, but the member is susceptible to fracture and early deterioration due to friction
Solution Approach 1:
The rotation suppression member serves as a protective intermediary that absorbs the frictional forces involved in preventing unintended rotation. This protects the torque control member from excessive friction, reducing the risk of fracture and early deterioration while maintaining insertion portion stability.
Solution Approach 2:
The rotation suppression member is designed to automatically engage and suppress rotation when the cylindrical handle is assembled, without requiring additional adjustment or intervention. This self-service mechanism ensures consistent rotation prevention while minimizing wear on the torque control member through proper positioning and contact design.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Prevents unintended rotation of the insertion portion while facilitating assembly work by enhancing workability and reducing the risk of damage to the rotation suppression member.
Implementation Method 1
a rotation suppression member that is provided in the operation unit, contacts the bottom of the cylindrical handle, and suppresses rotation of the cylindrical handle
Data Source
AI summary
Provided is an endoscope including: a rotary cylindrical portion that is connected with an insertion portion to be inserted into a body lumen and rotates together with the insertion portion; and an operation unit that operates the insertion portion, and the endoscope further includes: a cylindrical handle that has a bottom in which a through hole into which the rotary cylindrical portion is internally fitted is formed and that rotates the rotary cylindrical portion; and a rotation suppression member that is provided in the operation unit, contacts the bottom of the cylindrical handle, and suppresses rotation of the cylindrical handle.