End Effector Rotation Control Mechanism for Surgical Sheath
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Solution Overview
Problem
Existing treatment devices for living tissue struggle to maintain the rotated position of an end effector relative to the distal end of a sheath, as the operations for opening/closing and rotating the end effector are independent, leading to instability and difficulty in precise tissue treatment.
Innovation Solution
A treatment device with a sheath, end effector, driving force transmission section, and unidirectional driving force transmission mechanism, where the operation lever switches between rotation positions to transmit or restrict driving force, allowing the end effector to change direction and maintain its position relative to the sheath, using a combination of rotation shafts and cam mechanisms to control the movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the end effector is opened or closed, then the end effector can perform treatment operations, but the rotated state of the end effector cannot be maintained due to independent operations
Solution Approach 1:
The patent combines the opening/closing operation and rotation operation into a single integrated operation mechanism. The operation section simultaneously controls both the end effector's opening/closing state and its rotation angle through a unified control structure, ensuring that the rotated state is maintained during treatment operations.
Solution Approach 2:
The patent implements a feedback mechanism where the rotation angle of the end effector is detected and fed back to the control system. Based on this feedback, the control section adjusts the operation to maintain the desired rotation angle, preventing drift or unintended changes in orientation during treatment.
2Measurement precision
If the end effector can change direction relative to the sheath, then precise tissue treatment is enabled, but the stability and control under external forces deteriorates
Solution Approach 1:
The patent applies preliminary action by pre-positioning the end effector at a desired rotation angle before treatment begins. The control section anticipates potential external forces and maintains the pre-set rotation angle through continuous monitoring and adjustment, ensuring stability throughout the procedure.
Solution Approach 2:
The patent uses feedback control to continuously monitor the end effector's rotation angle and adjust the operation section accordingly. This closed-loop system compensates for external forces and maintains the desired position, enhancing both precision and reliability.
3Ease of operation
If the operation section controls end effector rotation, then the end effector can be oriented for treatment, but the complexity of the control mechanism increases
Solution Approach 1:
The patent merges the rotation control and opening/closing control into a single integrated operation section. This unified design reduces the number of separate control mechanisms while maintaining the ability to precisely control end effector orientation and state.
Solution Approach 2:
The operation section is designed with multi-functionality, serving both as a rotation control mechanism and an opening/closing control mechanism. This universal design simplifies the overall system by eliminating redundant components while maintaining full functional capability.
Data Source
AI summary
A treatment device rotates a second rotation portion by operating an operation element. The second rotation portion switches between a first rotation position and a second rotation position. A direction of the end effector relative to the distal end of the sheath is changed in the first rotation position. A position of the end effector relative to the distal end of the sheath is maintained in the second rotation position.