Endoscope Transmitting Member Segmentation for Rotation and Bending
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Solution Overview
Problem
Endoscope treatment instruments face challenges in achieving both high rotation follow-up properties and responsive movement, as existing designs either compromise on rotation follow-up due to flexibility or nullify it with poor responsiveness when advancing or retracting the sheath.
Innovation Solution
The endoscope treatment instrument employs a flexible transmitting member composed of a first coil sheath with high rotation follow-up and bending properties, connected to a second coil sheath for enhanced longitudinal motion, along with a ratchet mechanism for electrical conduction and interruption, allowing for precise orientation and movement of the treatment portion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a multiple layer coil is employed over the entirety of the sheath, then the rotation follow-up property is good, but the response when advancing or retracting the sheath is poor
Solution Approach 1:
The sheath is divided into multiple sections with different coil configurations: a distal end section with multiple layer coil for rotation follow-up, and a proximal end section with single strand coil for responsive movement. This segmentation allows each section to optimize its function independently.
Solution Approach 2:
Different parts of the sheath are given different structural qualities: the distal end has a multiple layer coil structure for flexibility and rotation follow-up, while the proximal end has a single strand coil structure for rigidity and responsive advancement/retraction. This local differentiation resolves the contradiction between rotation follow-up and movement response.
2Stability of the object's composition
If a single strand intermediate coil and a multiple strand rear coil are connected so that the hardness gradually increases, then the structure is stable, but the rotation follow-up property is nullified by the poor rotation follow-up property of the single strand coil portion
Solution Approach 1:
The sheath is segmented into distinct functional zones: a distal end section with multiple layer coil that maintains high rotation follow-up property, and a proximal end section with single strand coil that provides structural stability. The segmentation prevents the single strand coil from negating the rotation follow-up capability of the multiple layer coil section.
Solution Approach 2:
The distal end portion is designed with multiple layer coil structure specifically to maintain rotation follow-up property, while the proximal end uses single strand coil for structural stability. This local quality differentiation ensures that the single strand coil portion does not nullify the rotation follow-up property where it is most needed.
3Ease of manufacture
If a regular single strand coil is connected to the distal end of a multiple strand coil, then the ease of manufacture is improved, but the rotation follow-up property is compromised
Solution Approach 1:
The distal end of the sheath is designed with multiple layer coil structure specifically to ensure high rotation follow-up property, while the proximal end uses single strand coil for ease of manufacture and structural stability. This local quality differentiation resolves the contradiction by placing the more complex multiple layer coil structure where rotation follow-up is most critical.
Data Source
AI summary
An endoscope treatment instrument provided with a flexible transmitting member, a treatment portion that is attached to the distal end of the transmitting member, and an actuator which is attached to the proximal end of the transmitting member and is for operating the treatment portion, this endoscope treatment instrument being designed to transmit the action of the actuator to the treatment portion via the transmitting member. The transmitting member consists of the connection in the longitudinal direction of a first coil sheath that has excellent rotation follow-up and good relative bending properties, and a second coil sheath that has excellent rotation follow-up and good ease of motion in the relative longitudinal direction.