Surgical Instrument Fixing Device Protrusions Grooves Alignment

The fixing device is divided into multiple independent bodies (first body, second body, third body) each with specific functions. The first body provides initial holding, the second body with protrusions and grooves provides precise alignment, and the third body provides additional support. This segmentation allows each component to be optimized for its specific function while maintaining overall positioning precision without excessive complexity.

The structures are nested within each other: the surgical instrument is accommodated in the first body, which is then coupled with the second body that has protrusions fitting into grooves, and the third body provides additional support. This nested arrangement allows multiple levels of precision fixing to be integrated into a compact structure, improving positioning precision while controlling device complexity through efficient space utilization.

The protrusions and grooves are designed with asymmetric geometries that guide the coupling process. The protrusions on the second body fit into corresponding grooves, creating a self-aligning mechanism that automatically positions the bodies correctly during assembly. This asymmetric design simplifies the coupling operation by providing inherent alignment guidance, making the multi-body structure easier to operate despite the increased number of components.

The coupling mechanism between bodies is designed to be self-aligning and self-locking. The protrusions and grooves automatically guide the bodies into correct alignment during assembly, and the elastic member provides self-adjusting force to maintain the coupling. This self-service capability eliminates the need for complex alignment procedures or additional adjustment mechanisms, improving ease of operation while maintaining high alignment precision through the inherent design of the coupling interface.