Folding mechanism for bicycles has first section of upper frame tube provided with thrust rod interacting with drop locking slot on outer circumference to provide connection with inner tube

摘要

The folding mechanism comprises an upper frame tube(2), an inner tube(3) and a thrust rod(41), with the upper tube divided into two sections(21,22) The first section(21) comprises the inner tube, a drop locking slot(212) on the first section's outer circumference, and the thrust rod which interacts with the locking slot to provide a connection with the inner tube. The inner tube protrudes into the connecting section between the first and second sections of the upper tube. Collapsing of the two sections is prevented if the inner tube extends through them so that the structural rigidity of the folding mechanism is increased.