Surgical Forceps Jaw Welding for Rigid Lumen-Scale Assembly
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Solution Overview
Problem
Securing the fixed jaw to the outer shaft of single-acting surgical forceps is difficult due to the size constraints when the forceps are configured to be inserted through a lumen, complicating manufacturing and the rigidity of the connection.
Innovation Solution
The fixed jaw is secured to the outer shaft using one or more welds, such as laser welds, applied externally after assembly to ensure a rigid and secure connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the fixed jaw is secured to the outer shaft using traditional mechanical fastening methods, then the connection can be made during assembly, but the connection rigidity and structural integrity are insufficient
Solution Approach 1:
The patent replaces traditional mechanical fastening methods (screws, clips, or interference fits) with laser welding to secure the fixed jaw to the outer shaft. This substitution provides a more rigid and secure connection while simplifying the manufacturing process by eliminating the need for complex mechanical assembly steps. The laser weld creates a permanent, high-strength bond that ensures structural integrity during surgical use.
2Length of moving object
If the forceps are designed with size constraints for insertion through a lumen, then the device can be used for minimally invasive surgery, but the difficulty of securing the fixed jaw increases
Solution Approach 1:
The patent applies laser welds to secure the fixed jaw to the outer shaft after the forceps components are assembled. This preliminary assembly followed by external welding allows the small components to be positioned correctly before creating the permanent bond, overcoming the difficulty of securing parts in a compact configuration. The external application of welds avoids the need for complex internal fastening mechanisms that would increase the size of the forceps.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method simplifies manufacturing and provides a robust connection between the fixed jaw and the outer shaft, enhancing the structural integrity and ease of assembly of surgical forceps.
Implementation Method 1
one or more welds, such as laser welds
Data Source
AI summary
A surgical forceps can include an outer shaft, a first jaw, a second jaw, and an inner shaft. The first jaw can include a first flange and a second flange. The first jaw can be pivotably coupled to the outer shaft. The second jaw can include a third flange and a fourth flange. The third flange can be welded to the outer shaft and the fourth flange can be welded to the outer shaft. The inner shaft can be engaged with the first flange and the second flange. The inner shaft can be movable with respect to the outer shaft, the third flange, and the fourth flange to move the first jaw between an open position and a closed position.