Surgical Manipulator Wire Tension Adjustment Mechanism
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Solution Overview
Problem
Existing manipulators for surgical procedures face challenges in maintaining consistent tension in the wires used to bend and control treatment tools, which affects the precision and ease of operation during internal organ treatments.
Innovation Solution
A manipulator system with a rotary unit that includes a shaft member and a disc member, where a wire is wound around the peripheral wall and connected to an elastic unit, allowing for adjustable initial tension through rotation and locking mechanisms, ensuring consistent tension and smooth actuation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a spring is used to keep tension in the wire, then the tension of the wire is maintained, but the adjustment of initial tension becomes difficult and complex
Solution Approach 1:
The patent applies the dynamics principle by replacing the static spring-based tension maintenance system with a dynamic adjustment mechanism. The wire is wound around a rotary unit that can be rotated to adjust the initial tension, and a lock portion is provided to maintain the adjusted tension. This allows the tension to be dynamically adjusted and locked at the desired level, resolving the contradiction between maintaining consistent tension and enabling easy adjustment.
2Device complexity
If the wire is directly connected to the rotary unit without an elastic unit, then the structure is simpler, but the initial tension cannot be adjusted and maintained consistently
Solution Approach 1:
The patent applies the intermediary principle by introducing an elastic unit as a mediator between the wire and the rotary unit. The elastic unit serves as an intermediary element that, when combined with the rotary unit and lock portion, enables both simple structure and consistent tension maintenance. The elastic unit allows for tension adjustment while maintaining a relatively simple overall structure, resolving the contradiction between structural simplicity and tension consistency.
3Measurement precision
If multiple wires are used for bending control, then the manipulation precision is improved, but maintaining equal tension in all wires becomes difficult
Solution Approach 1:
The patent applies the universality principle by designing a universal tension adjustment mechanism that can be applied to multiple wires. Each wire is equipped with the same rotary unit and lock portion assembly, allowing for standardized and easy tension adjustment. This multi-functional design enables consistent tension maintenance across all wires used for bending control, resolving the contradiction between manipulation precision and tension balancing ease.
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
Enables easy and precise adjustment of the initial tension of the wire, enhancing the manipulator's operational precision and ease of use during surgical procedures by maintaining consistent tension and preventing slack.
Implementation Method 1
an elastic unit that is located along an outer peripheral surface of the peripheral wall, has one end and the other end, and is connected at the one end to the other end of the wire
Data Source
AI summary
A manipulator and a manipulator system adjust the initial tension easily yet unerringly during assembling. The manipulator includes a main unit, an elongated portion that extends from the main unit, a distal end that is connected to the elongated portion, a wire for transmission of power for putting the distal end into actuation, a drive unit for generation of power to the wire, a rotary unit which is located in the main unit, around which the wire is wound and which is rotated by the drive unit, and an elastic unit for connecting the wire to the rotary unit.