Abstract: A product may include a steering tube that may have a first component, and a second component. A hinge may be connected to enable the first and second components to fold relative to one another so that the steering tube is foldable. A latch may secure the first and second components in an unfolded position. The first and second components may be locked in a folded position. The latch may include a lever that has a latch hook. The first and second components may be secured through engagement of the latch hook with a striker.

Abstract: A two stage quick-release structure includes a first tubing member, a second tubing member, a first pivoting portion, a first buckling portion, an elastic hook and a safety fastener. When the user assembles the foldable bicycle for bicycling, the first tubing member is rotated to connect with the second tubing member via the first pivoting portion, so that the elastic hook correspondingly buckles with the first buckling portion to form a first stage buckle; then, the safety fastener is rotated to correspondingly buckle with the elastic hook so as to form a second stage buckle. The two stage buckle contributes the assembling of the foldable bicycle with ease and convenience. Furthermore, via the two stage buckle structures, the connection between the front bicycle frame body and the rear bicycle frame body are tightly secured.

Abstract: A folding device includes a main body, two connecting members respectively pivotally connected to the main body, and a locking assembly. Each connecting member includes an engaging portion. The locking assembly includes first and second hooking members, a lever, and an axial member. The first hooking member and the lever are pivotally connected to the main body. The axial member is inserted through the main body, the first hooking member and the lever. The second hooking member is pivotally connected to the lever. The first hooking member includes a first hooking portion, and the second hooking member includes a second hooking portion. The lever is pivotable with respect to the main body between locking and releasing positions.