Line-Contact Roller Mechanism for Stable Medical Wire Handling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional vascular intervention robots experience frequent slipping of medical wires due to point contact between rollers and the guide wire, which affects the stability and convenience of the procedure.
Innovation Solution
A vascular intervention robot with a line-contact roller mechanism, featuring a roller module with drive and guide rollers arranged in a longitudinal configuration, providing rolling contact along the medical wire to minimize slipping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional point-contact roller mechanism is used, then the structure is simple, but the medical wire frequently slips on the roller surface
Solution Approach 1:
The patent transitions from point contact (0D contact area) to line contact (1D contact area) by arranging multiple rollers in the longitudinal direction of the medical wire. This dimensional change increases the contact area between rollers and wire, preventing slip while maintaining structural simplicity through the use of multiple basic roller elements.
Solution Approach 2:
The patent divides a single roller into multiple segmented rollers arranged in the longitudinal direction of the medical wire. Each roller segment provides partial contact, and collectively they create continuous line contact along the wire length, improving reliability without requiring a completely new mechanism design.
2Reliability
If multiple rollers are arranged in the longitudinal direction, then line contact is achieved and slipping is minimized, but the device complexity increases
Solution Approach 1:
The patent merges multiple rollers into a unified roller module where rollers are arranged in the longitudinal direction and work together as an integrated unit. The rollers share common support structures and drive mechanisms, achieving line contact functionality while minimizing the increase in overall device complexity through combined design.
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
The line-contact roller mechanism significantly reduces slipping of medical wires, enhancing the stability and convenience of vascular intervention procedures by ensuring smooth translation and rotation of medical wires.
Implementation Method 1
at least one drive roller receiving the translational driving force from the translational motor, arranged in a longitudinal direction of the medical wire, and coming into rolling contact with a lower side of the medical wire
Implementation Method 2
coming into rolling contact with a lower side of the medical wire; and a plurality of guide rollers provided in a number corresponding to a number of the drive roller and arranged on the drive roller
Data Source
AI summary
A vascular intervention robot having a line-contact roller mechanism is provided. The vascular intervention robot having a line-contact roller mechanism comprises: a roller module for translating a medical wire; and a rotation module for axially rotating the medical wire by rotating the roller module. The roller module can comprise: a translational motor providing a translational driving force for translating the medical wire; at least one drive roller receiving a translational driving force from the translational motor, arrayed in the length direction of the medical wire, and rolling-contacted with the lower part of the medical wire; and a guide roller provided in a number corresponding to the drive roller, arrayed above the drive roller and in the length direction of the medical wire, shifted to one side in the length direction of the medical wire with respect to the drive roller, and rolling-contacted with the upper part of the medical wire. Therefore, the vascular intervention robot having a line-contact roller mechanism can be provided which can minimize slip of the medical wire when the medical wire is axially rotated in accordance with the rotation of the roller module due to the rotation module, and also can minimize slip of the medical wire when translation-moved by means of the roller module.