Clip Pushing Structure for Applier with Segmented Ladder
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Solution Overview
Problem
The existing clip pushing structure of clip appliers is complex, prone to inaccuracy due to frictional resistance, and lacks flexibility, often resulting in clips not being properly positioned or entering the clamping jaw, which can lead to serious issues if the clip falls inside the human body.
Innovation Solution
A clip pushing structure featuring a nail mounting groove piece with a receiving slot and a screw-in ladder member with defined pitches, a nail pushing member with front and rear pushing parts, and a clamping jaw assembly with expandable arms, allowing for precise and elastic clip placement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a rear spring compresses and pushes the clip from beginning to end, then the clip can be continuously pushed, but the spring force changes due to frictional resistance making the nailing inaccurate
Solution Approach 1:
The pushing mechanism is divided into multiple discrete pushed parts (first, second, third pushed parts) with defined pitches between them. Each pushed part engages with corresponding nails at different stages, providing segmented pushing actions that maintain consistent force throughout the nailing process, eliminating the continuous spring force variation problem.
2Ease of operation
If the front push nail is pushed by another element pushed by two different driving elements, then the structure can drive the nail, but the structure becomes more complicated and the accuracy of pushing the nail body forward is poor
Solution Approach 1:
The screw-in ladder member integrates multiple functions: it serves as both the driving element and the pushing mechanism for multiple nails simultaneously. The ladder member's inclined surface combines the driving force transmission with the positioning function, eliminating the need for separate driving elements and reducing structural complexity while improving pushing accuracy.
Solution Approach 2:
The nail pushing member acts as an intermediary between the screw-in ladder member and the clips/nails. It receives the driving force from the ladder member and translates it into precise linear pushing motion for the nails, ensuring accurate forward movement while simplifying the overall drive mechanism.
3Reliability
If the clip wants to enter the clamping jaw, then the clamping jaw assembly restrains the clip, but it lacks flexibility causing the clip to fall or not enter smoothly
Solution Approach 1:
The clamping jaw assembly is designed with dynamic characteristics that allow it to adapt during the clipping process. The assembly can adjust its restraint level based on the clip's insertion stage, providing initial flexibility to guide the clip in smoothly, then increasing restraint to secure the clip firmly in position, preventing both dropping and insertion failures.
Data Source
AI summary
A clip pushing structure for a clip applier, which is used to install and push clips. The clip pushing structure comprises: a nail mounting groove piece which has a receiving slot, wherein the clips are placed in the receiving slot of the nail mounting groove piece in a continuous abutting manner; a screw-in ladder member which has a nail-pushing part and a plurality of pushed parts, a pitch being formed between every two pushed parts; a nail pushing member which has a body, a front pushing part that may push the foremost clip, and a rear pushing part that may push each pushed part of the screw-in ladder member; and a clamping jaw which penetrates a clamping jaw assembly, the clamping jaw having two arms which each have a convex part and abut against a left side wall and a right side wall of the clamping jaw assembly.