Opposed-Jaw End Tool for Compact Anvil-Centric Motion
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Solution Overview
Problem
Existing surgical instruments with anvil-centric designs face challenges in design complexity and space utilization limitations, making it difficult to implement anvil-centric motions effectively.
Innovation Solution
The end tool and surgical instrument design simulates anvil-centric motion by allowing the first jaw to rotate in the opposite direction to the second jaw, maintaining a constant angle with the connection part while adjusting the angle between the first and second jaws, using a pitch rotation shaft and a second jaw rotation shaft, and incorporating a pitch pulley and fastening member to transmit driving force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an anvil-centric design is implemented in traditional surgical instruments, then the motion control is improved, but the device complexity and space utilization are worsened
Solution Approach 1:
Instead of making the anvil (second jaw) stationary as in traditional anvil-centric designs, this patent inverts the approach by making the first jaw rotate about the pitch rotation shaft while the second jaw rotates about a second jaw rotation shaft. This inversion allows the first jaw to actively participate in the rotation, simplifying the overall mechanism while maintaining anvil-centric motion characteristics
Solution Approach 2:
The pitch rotation shaft serves multiple functions: it is the rotation axis for the first jaw, it is coaxial with the second jaw rotation shaft, and it enables both jaws to work together in a coordinated manner. This multi-functionality reduces the need for separate complex mechanisms, thereby reducing device complexity while maintaining operational effectiveness
2Ease of operation
If an anvil-centric design is implemented in traditional surgical instruments, then the motion control is improved, but the space utilization is worsened
Solution Approach 1:
The second jaw rotation shaft is disposed within the first jaw, creating a nested configuration. The pitch rotation shaft and second jaw rotation shaft are coaxial, with the second jaw rotation shaft nested inside the structure of the first jaw. This nesting arrangement significantly reduces the space required for the mechanism while maintaining the anvil-centric motion control
Solution Approach 2:
By inverting the traditional anvil-centric design where the anvil is stationary, this patent allows the first jaw to rotate actively about the pitch rotation shaft. This inversion enables a more compact arrangement where the rotation mechanisms are shared and coaxial, improving space utilization while preserving motion control
Data Source
AI summary
Provided are an end tool and a surgical instrument. The end tool of a surgical instrument, which is coupled to one end of a connection part of an external device, includes a first jaw rotatable about a pitch rotation shaft and a second jaw relatively rotatable with respect to the first jaw about a second jaw rotation shaft disposed in the first jaw parallel to the pitch rotation shaft, wherein the first jaw and the second jaw are opposed to each other and perform an opening or closing operation, and the first jaw rotates about the pitch rotation shaft but rotates in a direction opposite to a rotation direction of the second jaw in response to the second jaw rotating about the second jaw rotation shaft.