Surgical Forceps Pivot Pin Positioning
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Solution Overview
Problem
Conventional surgical gripping forceps with shared pivot pins limit the length of lever arms and require separate push elements for each jaw, complicating the mechanism and increasing the risk of injury and disinfection issues.
Innovation Solution
Each gripping jaw has its own pivot pin positioned at least 38% of the main body's width or diameter from the center line, allowing for a substantial clamping force with fewer structural parts and a simpler mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a shared pivot pin is used for both gripping jaws, then the structure is simplified, but the lever arm length is limited and clamping force is reduced
Solution Approach 1:
The patent divides the single shared pivot pin into two separate pivot pins, one for each gripping jaw. This segmentation allows each jaw to have its own lever arm extending from the center line, thereby increasing the lever arm length and enabling greater clamping force while maintaining structural simplicity through modular design
2Ease of operation
If separate push elements are used for each lever arm, then individual jaw control is improved, but the number of parts increases and the mechanism becomes more complex
Solution Approach 1:
The patent merges two separate push elements into a single integrated push element that acts on both lever arms simultaneously. This combining approach maintains individual jaw control capability while reducing the total number of parts and simplifying the overall mechanism structure
3Volume of moving object
If the pivot pin is positioned close to the center line, then the structure is compact, but the lever arm length is reduced and clamping force is diminished
Solution Approach 1:
The patent positions the pivot pins at a distance greater than 38% of the main body width from the center line, utilizing the lateral dimension more effectively. This dimensional optimization allows longer lever arms to extend further from the center line, increasing clamping force while maintaining a compact overall structure through efficient space utilization
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
The design enables effective clamping with customary force while minimizing parts, reducing the risk of injury and facilitating disinfection, thus enhancing the safety and usability of the forceps.
Implementation Method 1
each gripping jaw has a pivot pin, fixed in position relative to the main body, and a lever arm
Implementation Method 2
The lever arms are articulated via at least one push element... enables a substantial clamping force of the forceps between the gripping jaws
Data Source
AI summary
Surgical gripping forceps are provided with one or two gripping jaws movable relative to a main body, wherein each moveable one of the gripping jaws has a pivot pin, fixed in position relative to the main body, and a lever arm. The lever arms are articulated via at least one push element. For this purpose each movable one of the gripping jaws has its own pivot pin. From the midline of the main body, the individual pivot pin has at least a distance greater than 38% of the maximum width of the main body or maximum diameter of the main body. The microsurgical gripping forceps operate with customary force for actuating the forceps, and permit a substantial applied clamping force.