Torque Regulating Mechanism for Medical Tubular Insertion Devices

The insertion device is divided into multiple sections with different structural characteristics. The proximal section has a smaller outer diameter and different wall thickness compared to the distal section, creating segments with different torsional rigidities. This segmentation allows the proximal part to preferentially absorb rotational torque through controlled buckling, protecting the distal working section from excessive torque that would cause harmful buckling in the tract.

The proximal section is designed with specific structural characteristics (smaller outer diameter, different wall thickness) that make it more compliant to torsional loads before the device is inserted. This beforehand cushioning structure absorbs excess rotational torque through controlled deformation at the proximal end, preventing the torque from reaching critical levels that would cause buckling of the distal section inside the tract.

The device incorporates a torque detection mechanism that automatically detects excessive torque and provides visual feedback through color changes or markers before buckling occurs inside the tract. This preliminary detection action allows the operator to immediately recognize torque excess and adjust operation, preventing buckling rather than detecting it after the fact, thereby eliminating the need for time-consuming device replacement.

The insertion device includes visual indicators such as color-coded sections or markers that change appearance or become visible when excessive torque is applied. This color change mechanism provides immediate visual feedback to the operator about torque levels, enabling real-time detection and correction before buckling occurs, thus avoiding the time loss associated with visual confirmation of buckling and device replacement.

The insertion device features local quality variations where only specific sections (proximal part) have modified structural characteristics such as smaller outer diameter and different wall thickness, while the distal working section maintains its original design. This localized modification approach provides buckling protection where needed without unnecessarily complicating the entire device structure, maintaining simplicity in the critical working portions.

The device incorporates dynamic characteristics through its segmented structure, allowing different sections to respond differently to torsional loads. The proximal section is designed to be more compliant and capable of controlled deformation, while the distal section remains relatively rigid for precise positioning. This dynamic differentiation provides effective buckling protection while maintaining operational simplicity through natural structural behavior rather than complex active control mechanisms.