Endoscope Forceps with Adjustable Compression Mechanism
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Solution Overview
Problem
Existing endoscope treatment tools face issues with excessive force application on tissues due to continuous wire retraction after forceps closure, leading to tissue burden and instability during erratic endoscope movement, which complicates precise force control.
Innovation Solution
The endoscope treatment tool incorporates a force adjustment mechanism with a pin member and coil spring system that fixes the first operation member to the main body upon predetermined force compression, maintaining constant force on the tissue and preventing excessive force application, while a control section adjusts initial compression and a maximum force control section manages the force magnitude.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the operation wire is continuously retreated after the forceps members are closed, then the forceps members can maintain closure, but a large amount of force is acted on the tissue causing excessive burden
Solution Approach 1:
The patent changes the mechanical parameter of the operation section by introducing a force adjustment member that compresses to limit wire retraction distance. This parameter change ensures the operation wire cannot be retreated beyond a predetermined amount, thereby limiting the maximum force applied to the tissue while maintaining forceps closure reliability
Solution Approach 2:
The force adjustment member acts as an intermediary between the operation wire and the forceps members. It mediates the force transmission by providing mechanical resistance when compressed, preventing excessive force from being transmitted to the tissue while still allowing sufficient force for closure
2Adaptability or versatility
If the endoscope moves erratically within the body, then the sheath expands and contracts, but the relationship between operation section movement and force on treatment section becomes unstable
Solution Approach 1:
The force adjustment member provides preliminary anti-action by pre-compression capability. It is configured to be compressible by a predetermined amount, creating preliminary resistance that counteracts erratic movements of the endoscope and sheath, thereby maintaining stable force control relationship independent of endoscope movement
Solution Approach 2:
The compressible force adjustment member provides beforehand cushioning against force fluctuations. By being pre-configured to compress within a predetermined amount, it cushions against the unstable force transmission caused by sheath expansion and contraction during erratic endoscope movement
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
This configuration ensures consistent and controlled force application on tissues, preventing excessive force and maintaining stability even during erratic endoscope movements, allowing for safer and easier tissue treatment with predetermined maximum force settings.
Implementation Method 1
a force adjustment member that is attached to the second operation member and is compressed by the second operation member being slid to the first operation member
Implementation Method 2
an operation wire for connecting the pair of forceps members to the operation section
Data Source
AI summary
A treatment tool for endoscope includes a pair of forceps members supported so as to be relatively movable by a rotation shaft, an operation section for performing opening/close operations of the forceps members, and an operation wire for connecting the forceps members to the operation section, wherein the operation section has an operation section main body, a first operation member to which the operation wire is connected and which is slideably attached to the operation section main body, a second operation member which is slideably attached to the first operation member, a force adjustment member which is attached to the second operation member and is compressed by the second operation member is slid to the first operation member.