Hemostatic Forceps Inner Tube Wire Segmentation
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Solution Overview
Problem
Existing hemostatic forceps for endoscopes face challenges in facilitating the rotation and swing of pincer pieces and require separate devices for fluid injection, leading to slow and imprecise rotation reactions and difficulties in accurately identifying hemorrhage sites.
Innovation Solution
The design includes a handle part with a slider and fluid injection port, a pair of pincer pieces on a rotatable housing, and inner and outer tubes that allow the pincer pieces to rotate and swing freely while preventing wire bending, enabling immediate force transmission and smooth fluid injection for precise hemorrhage site identification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the operation wire is bent when the slider moves forward to open the pincer pieces, then the pincer pieces can be opened, but the rotation and swing are not immediate and the rotation reaction is slow
Solution Approach 1:
The operation wire is divided into multiple segments (first operation wire and second operation wire) that can move independently through guide holes in the inner tube. This segmentation allows each wire to follow an optimized path, reducing bending and interference, thereby enabling immediate rotation and swing of the pincer pieces while maintaining precise control during operation.
2Force
If the operation wire is twisted to transmit rotation to the pincer pieces at a long distance, then rotational force can be provided, but the rotation reaction is slow and difficult to precisely adjust
Solution Approach 1:
The inner tube acts as an intermediary structure that guides the operation wires from the slider to the pincer pieces. The guide holes in the inner tube provide a controlled path for the wires, enabling efficient rotational force transmission without excessive twisting. This intermediary structure reduces the distance effect and allows for immediate rotation response while maintaining the ability to precisely adjust the pincer piece position.
3Reliability
If a separate device for injecting fluid is used to ensure visual field, then hemorrhage site can be identified, but the device complexity increases
Solution Approach 1:
The fluid injection function is merged with the existing hemostatic forceps structure. The fluid injection needle is integrated into the handle assembly, allowing fluid to be injected through the same device used for hemostasis. This combination eliminates the need for a separate fluid injection device, reduces overall system complexity, and ensures reliable visual field assurance by maintaining clear visibility during hemorrhage identification and treatment.
Data Source
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AI summary
A hemostatic forceps includes a handle part, a slider (200) slidably installed on the handle part, a fluid injection part (300) connected to the handle part and having a fluid injection port, an outer tube extending from the fluid injection part, a housing coupled to an end of the outer tube, a pair of pincer pieces (600) installed on the housing so as to be openable and closable relative to each other, a pair of wires (700) each having two opposite ends respectively connected to the pair of pincer pieces and the slider, and an inner tube (800) disposed in the outer tube and configured to surround the pair of wires.