End Cap Assembly for Sunshade Stopper Retention

The end cap is segmented into multiple functional retention walls: a rear retention wall for capturing the stopper, a side retention wall extending along the side wall to prevent deflection, and a front retention wall. This segmentation allows each wall to perform a specific retention function, improving overall reliability without requiring excessive height from a single wall.

The solution transitions from a single vertical height dimension to multiple spatial dimensions by adding side retention walls that extend along the side wall of the stopper. This multi-dimensional approach provides deflection prevention through lateral constraint rather than relying solely on increased vertical height.

The retention system is segmented into multiple walls positioned at different locations: the rear retention wall captures the stopper, the side retention wall prevents deflection, and the front retention wall prevents rotation. This segmentation distributes the retention functions across simple geometric features rather than requiring complex integrated components.

Instead of adding complex active retention mechanisms, the solution uses passive geometric constraints formed by the retention walls. The walls create a cavity that passively constrains the stopper in multiple directions, preventing rotation and deflection through simple form rather than complex function.