Surgical Stapler Jaw Mechanism to Prevent Operation Member Backslip
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Solution Overview
Problem
Existing surgical staplers lack mechanisms to prevent backward movement of the operation member during stapling, which can compromise the precision and efficiency of surgical procedures.
Innovation Solution
A surgical instrument with a mechanism that includes a reciprocating assembly and a backward-moving wire structure, featuring a backward-moving wire pulley and coupling members to control the movement of the operation member, ensuring it remains stable during stapling and facilitates its backward movement post-stapling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a surgical stapler is used for cutting and anastomosis, then operation time is shortened and stapling accuracy is improved, but backward movement of the operation member during stapling cannot be prevented
Solution Approach 1:
The patent applies the preliminary anti-action principle by introducing a prevention member that proactively prevents backward movement of the operation member during the stapling process. The prevention member engages with the operation member before backward movement can occur, applying a counteracting force to maintain forward movement and ensure stapling accuracy, thus resolving the contradiction between operational efficiency and precision
2Ease of operation
If the operation member is moved forward for stapling, then stapling can be performed, but backward movement during stapling causes inefficiency and potential errors
Solution Approach 1:
The patent implements feedback by incorporating a prevention member that provides real-time mechanical feedback on the operation member's movement status during stapling. When the operation member attempts to move backward, the prevention member detects this and applies immediate counter-force, ensuring the operator is aware of and corrected from any deviating movement, thereby maintaining surgical efficiency and preventing errors
3Reliability
If a mechanism is added to prevent backward movement, then stapling accuracy is improved, but device complexity increases
Solution Approach 1:
The patent applies the extraction principle by isolating the backward movement prevention function into a separate, dedicated prevention member that operates independently from the main stapling mechanism. This extracted component specifically addresses backward movement without interfering with the primary stapling operation, allowing for simplified design and easier maintenance while ensuring stapling precision
Data Source
AI summary
A surgical instrument includes an end tool including one or more jaws, wherein one of the one or more jaws includes a reciprocating assembly disposed in the jaw and formed to be movable in a first direction, which is a longitudinal direction of jaw, an operation member formed to be in contact with the reciprocating assembly and movable forward toward a distal end of the jaw from a proximal end side of the jaw in the first direction by the reciprocating assembly, and a backward-moving wire disposed adjacent to the operation member and movable in the first direction, wherein the backward-moving wire includes one or more coupling members fixed to the backward-moving wire, wherein the one or more coupling members are allowed to move the operation member backward toward the proximal end of the jaw.