Trigger Force Feedback Assembly With Spiral-Groove Anti-Slip Drive

The patent applies the curvature principle by designing a spiral groove on the driving shaft instead of a flat surface. The spiral groove provides a curved path that guides and secures the rope, preventing it from slipping off the shaft while maintaining transmission capability. The curved geometry of the spiral groove creates natural containment for the rope throughout its length.

The spiral groove acts as an intermediary element between the driving shaft and the rope. Rather than relying solely on friction between the rope and the shaft surface, the spiral groove provides a structured interface that mechanically guides the rope, preventing loosening and slippage while allowing smooth force transmission.

The spiral groove's curved geometry provides continuous guidance for the rope along its entire length, ensuring consistent contact and control. This curved path prevents the rope from deviating or loosening, thereby maintaining reliable feedback force control throughout the operation of the trigger assembly.

The spiral groove is pre-formed on the driving shaft during manufacturing, establishing the rope's path and containment before assembly. This preliminary structuring ensures that when the rope is installed, it is automatically guided and secured along the correct trajectory, preventing future loosening or slippage without requiring additional adjustment mechanisms.

The spiral groove's curved geometry provides mechanical containment for the rope under high force conditions. As force increases, the rope is pressed more firmly against the sides of the spiral groove, enhancing the gripping effect and preventing slippage. The curved path distributes the force along the groove's length rather than concentrating it at a single point.

The spiral groove effectively segments the rope's contact path into multiple small sections along its length. Each segment of the groove provides localized guidance and support, distributing the stress and preventing any single point from becoming a failure point under high force conditions.