Surgical Clip Jaw Recess Geometry for Complete Closure
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Solution Overview
Problem
Existing surgical instruments with short jaw members attached to robot arms face difficulties in securely closing clips due to interference from the folded portion of the clip, hindering complete closure.
Innovation Solution
The surgical instrument features groove-shaped recesses on the jaw members with varying depths, including a first section at the distal end and a second section near the rotation axis with a greater depth, allowing the folded clip portion to be escaped and preventing interference during closure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the jaw members are made short to maintain handleability of the surgical instrument, then the handleability is preserved, but the jaw members cannot be fully closed due to interference from the folded portion of the clip
Solution Approach 1:
The recess is designed with non-uniform depth, featuring a first section with a first depth and a second section with a second depth greater than the first depth. This local variation in depth allows the distal end of the clip to be held at a shallower level while accommodating the folded portion at a deeper level, enabling complete jaw closure without interference.
2Reliability
If the jaw members are made long to allow complete clip closure, then the clip can be securely closed, but the handleability of the surgical instrument deteriorates
Solution Approach 1:
Instead of increasing the overall jaw member length, the invention locally modifies the recess depth configuration. The second section extends deeper near the rotation axis to accommodate the folded clip portion, while the first section at the distal end remains at a moderate depth, maintaining jaw member compactness and handleability.
3Ease of manufacture
If the recess depth is uniform to simplify manufacturing, then the manufacturing process is simplified, but the folded portion of the clip interferes with jaw member closure
Solution Approach 1:
The recess is configured with two distinct depth sections: a first section with a first depth and a second section with a second depth greater than the first depth. This local depth variation accommodates the folded clip portion in the second section while maintaining adequate clearance for complete jaw closure, resolving the interference problem.
Solution Approach 2:
The recess is segmented into two functional sections along its length: the first section for holding the distal end of the clip and the second section for accommodating the folded portion. This segmentation allows each section to serve its specific function with appropriate depth, enabling complete clip closure.
Data Source
AI summary
A surgical instrument according to one or more embodiments may include: a base to be attached to a robot arm; a shaft including one end connected to the base; and a pair of jaw members provided to the other end of the shaft and provided to be rotatable about a first rotation axis so as to be opened and closed to each other, wherein opposing surfaces of the pair of jaw members include groove-shaped recesses, respectively, to hold a clip, and the recess of each of the jaw members includes a first section provided on a side of a distal end of the jaw member and having a first depth and a second section provided on a side of a first rotation axis of the jaw member with respect to the first section and having a second depth greater than the first depth.