Treatment Instrument Bending Force Compensation
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Solution Overview
Problem
Existing treatment instruments face a challenge in maintaining a consistent grasping force between clamping members when the end effector is bent or curved, as the axial force of the drive shaft decreases, affecting the grasping force's uniformity during tissue manipulation.
Innovation Solution
The treatment instrument incorporates a mechanism with elongated members and elastic members that apply restoring forces to the drive shaft, adjusting the grasping force based on the degree of bending or curving of the end effector, ensuring the force remains uniform across various angles and positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the end effector is bent or curved to reach treatment targets in difficult-to-access positions, then the adaptability and versatility of the instrument is improved, but the axial force of the drive shaft decreases, causing the grasping force between clamping members to become non-uniform
Solution Approach 1:
The spring member acts as a counterweight mechanism that generates a counteracting force to compensate for the axial force loss in the drive shaft. When the end effector is bent or curved, the spring member's elastic restoring force increases proportionally, thereby maintaining uniform grasping force between the clamping members despite the bending angle changes
2Adaptability or versatility
If the end effector is bent or curved, then the ability to manipulate tissues at various angles is improved, but the axial force transmission from the drive shaft is reduced, affecting treatment consistency
Solution Approach 1:
The spring member provides real-time feedback compensation for the axial force changes in the drive shaft. As the bending angle of the end effector changes, the spring member's elastic deformation changes accordingly, automatically adjusting the grasping force to maintain treatment consistency across different positions and angles
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 solution maintains a consistent grasping force between clamping members regardless of the end effector's angle, enhancing the instrument's ability to effectively grasp and treat tissues without compromising the grasping force, even when the end effector is bent or curved.
Implementation Method 1
a second member is configured to produce a second force that corresponds to a degree of bending or curving of the end effector and to apply the second force to the drive shaft
Data Source
AI summary
The disclosed technology is directed to a treatment instrument comprises an end effector having a pair of clamping members configured to pivot with respect to one another. A sheath is attached to the end effector along a longitudinal axis so that the end effector can be bent or curved. A drive shaft is connected to the end effector so as to guide the end effector to open or close the pair of clamping members relative to one another when moved in a longitudinal direction relative to the sheath. An elongated member is connected to the end effector and is configured to make the end effector bend or curve with respect to the sheath when moved in the longitudinal direction relative to the sheath. First and second members are configured to produce first and second forces sufficient to open or close the pair of clamping members.