Surgical Tool Bending Double Joint Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing surgical tools with double joints for remote manipulation lack efficient mechanisms for orienting and operating treatment tools, particularly in confined spaces, requiring larger radii for orientation changes and complex control for opening and closing operations.
Innovation Solution
A surgical tool with a bending double joint and an opening and closing joint mechanism, utilizing coaxial rotary shafts and gears to convert rotational forces into bending and opening/closing operations, allowing for compact design and simplified control of forceps pieces, with a link mechanism that enhances gripping force and reduces the required radius for orientation changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional double joint mechanism is used for orienting the treatment tool, then the orientation control is achieved, but the radius required for orientation changes is large and the device complexity increases
Solution Approach 1:
The patent combines the bending double joint and the treatment tool piece operating joint into an integrated structure. The first bending rotary shaft and second bending rotary shaft are merged with the first and second operating rotation members respectively, allowing orientation control and tool operation to be achieved within a compact space, thereby reducing the radius required for orientation changes while maintaining ease of operation.
Solution Approach 2:
The treatment tool piece operating joint is nested within the bending double joint structure. The first operating rotation member is coupled to the moving member and rotated around a predetermined rotation center, while the second operating rotation member is coupled to the first operating rotation member. This nested arrangement allows multiple functions to be achieved within a smaller radius, reducing the overall device complexity while maintaining operational ease.
2Ease of operation
If independent driving members are used for each treatment tool piece, then the opening and closing operation is achieved, but the control complexity and device complexity increase
Solution Approach 1:
The patent merges the control of both treatment tool pieces into a single integrated operating mechanism. The first operating rotation member controls both the opening and closing operations through its rotation, and the second operating rotation member provides additional control capability. This integrated approach simplifies the control mechanism compared to using independent driving members for each tool piece, while maintaining ease of operation.
Solution Approach 2:
The first operating rotation member serves multiple functions: it controls the opening and closing operations of both treatment tool pieces simultaneously. The second operating rotation member provides additional control capability for the treatment tool piece operation. This multi-functional design reduces the number of independent driving members needed, thereby reducing device complexity while maintaining operational ease.
3Volume of moving object
If a compact design is implemented to operate in narrower spaces, then the accessibility is improved, but the mechanism complexity may increase
Solution Approach 1:
The patent merges the bending double joint and treatment tool piece operating joint into a single integrated structure, allowing the surgical tool to achieve both orientation control and tool operation within a compact size. This merging eliminates the need for separate mechanisms, reducing the overall volume while maintaining functionality, and actually simplifies the mechanism compared to having separate independent systems.
Solution Approach 2:
The nested arrangement of the first and second operating rotation members within the bending double joint structure allows the surgical tool to achieve multiple functions within a compact volume. The first operating rotation member is rotated around a predetermined rotation center, and the second operating rotation member is coupled to it, creating a space-efficient configuration that reduces the surgical tool size without significantly increasing mechanism complexity.
Data Source
AI summary
In a surgical tool, the treatment tool piece operating joint includes a first operating rotation member which is coupled to the moving member and is rotated around a predetermined rotation center; a second operating rotation member which is coupled to the first operating rotation member so as to relatively rotate around a rotation center coaxial with the second bending rotary shaft in a rotation direction opposite to a rotation direction of the first operating rotation member or around a rotation center that is a position closer to the first bending rotary shaft than the second bending rotary shaft in a rotation direction opposite to a rotation direction of the first operating rotation member; and a link which converts a rotational force of the second operating rotation member into the operation of the treatment tool piece.