Surgical Jaw Control Projections to Simplify Tool Manufacturing
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Solution Overview
Problem
Existing surgical instruments with control grooves on both jaw parts are complex to manufacture and require multiple components, making them costly and difficult to produce.
Innovation Solution
The second jaw part features a receiving recess with inward-protruding control projections that replace the conventional control grooves, allowing the control pin to slide along these projections, reducing the need for separate components and simplifying the design and production process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If control grooves are formed on both jaw parts, then the control arrangement can convert translational movement into pivoting movement, but the manufacturing complexity increases and production becomes more difficult
Solution Approach 1:
The invention extracts the control groove from one of the jaw parts (specifically the second jaw part) and replaces it with control projections on the first jaw part. This reduces the number of complex features that need to be manufactured, as control grooves requiring oblong hole milling are eliminated from the second jaw part, while maintaining the essential control functionality through the remaining control groove and control projections
Solution Approach 2:
Instead of having control grooves on both jaw parts that guide the control pin, the invention inverts the approach by having control projections on the first jaw part that actively guide the control pin, while the second jaw part has only a receiving recess. This inversion simplifies the second jaw part's manufacturing requirements
2Ease of operation
If control grooves are milled as oblong holes on both jaw parts, then the control pin can slide along both grooves, but the production process becomes more complicated and costly
Solution Approach 1:
The invention merges the control guidance function into a single control groove on the first jaw part配合control projections, rather than requiring separate control grooves on both jaw parts. The control projections on the first jaw part work in conjunction with the single control groove to provide complete guidance for the control pin, reducing the total number of control features from four (two grooves on each jaw) to three (one groove and two projections)
Solution Approach 2:
The control projections are formed as integral features of the first jaw part through casting or molding, eliminating the need for separate machined components. This approach uses simpler, more cost-effective manufacturing methods compared to milling oblong holes in both jaw parts
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 design enables a more straightforward manufacturing process, reducing costs and complexity while maintaining functionality for grasping, holding, and cutting body tissue during minimally invasive surgeries.
Implementation Method 1
the control pin, in a movement between the proximal and distal end positions of the pin, slides along the control projection and is supported radially on the latter
Data Source
AI summary
A surgical instrument, a tool device for a surgical instrument, a method for producing a tool device, and a use of a tool device in a surgical instrument. The surgical instrument includes a shaft, a tool device having a first and a second jaw part and a control assembly, and a handle device. The second jaw part has a receiving recess together with a control projection of the control assembly.