A scooter hinge joint uses an arc-shaped slot and guide pin to create a torque-free locking mechanism for secure folding.
A vehicle suspension system uses a rocker arm and universal damper structure to maintain wheel contact during turns.
An asymmetric main frame hinge pivots the front wheel inward to reduce the folded footprint, while a rear rack support stand provides self-support stability.
Segmented frame design with rotatable joints reduces storage volume while maintaining structural strength during riding.
A foldable bicycle frame uses a lower tube to form a triangle structure with the center and main beam tubes.
A two-stage quick-release structure connects foldable bicycle frames using an elastic hook and safety fastener.