Knotter Punching Shearing Clip Suture Stability
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Solution Overview
Problem
The shearing knife of existing knotters is unstable when cutting a suture line, requiring high sharpness and being prone to damage, and the shearing knife's elastic element is unstable due to space limitations.
Innovation Solution
A knotter design that integrates a driving structure to drive a punching and shearing clip to clamp and knot the suture line, while simultaneously driving a scissor into an open or shearing state for stable cutting, using a compact and cost-effective structure with a driving rod and scissor mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a cutting knife is used to cut the suture line, then the cutting function is achieved, but the cutting knife requires high sharpness and the cutting edges are easy to damage
Solution Approach 1:
The patent combines the punching function and shearing function into a single integrated clip structure. The clip includes both a punching portion for penetrating the suture line and shearing blades for cutting, eliminating the need for separate cutting knives and their associated sharpness maintenance issues.
Solution Approach 2:
The patent extracts the cutting function from a separate cutting knife and integrates it directly into the clip structure. The shearing blades are built into the clip itself, allowing the cutting action to occur simultaneously with or immediately after the punching action, without requiring a separate cutting instrument.
2Ease of operation
If a shearing knife with elastic element is used, then the loose suture line can be cut, but the elastic element is unstable in operation due to space limitation
Solution Approach 1:
The patent merges the punching clip and shearing knife into a single integrated structure. The clip includes both the punching portion and the shearing blades, with the shearing blades positioned to automatically engage with the suture line after punching, eliminating the need for separate elastic elements to maintain knife opening.
Solution Approach 2:
The shearing mechanism is segmented into fixed blades and movable blades within the clip structure. The movable shearing blades can independently move to engage the suture line for cutting, while the overall clip structure remains stable during operation.
3Adaptability or versatility
If manual knotting is performed, then flexibility is maintained, but the suture line requires tight state for cutting and loose suture line is not easy to cut
Solution Approach 1:
The patent combines punching and shearing functions into a single clip operation. The integrated structure allows the clip to first punch through the suture line to secure it, then immediately shear the excess suture without requiring the suture to be in a specific tight state, as the shearing blades actively engage the material.
Data Source
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AI summary
A knotter, including: a driving structure (10); a punching and shearing clip (20), a clip mouth of the punching and shearing clip (20) having a first position in an open state, and a second position in a punching state when driven by the driving structure (10); and scissor (30) having a first position in an open state when driven by the driving structure (10), and a second position in a shearing state when driven by the driving structure (10). The second position of the scissor (30) is synchronized with the second position of the punching and shearing clip (20). The present invention effectively solves the problem that the shearing knife of the knotter in the related art is unstable when cutting the suture line.