Folding hook structure and carriage frame and as well as baby carriage having the same

A folding hook structure for arranging a first object and a second object being relatively rotatable in respect to each other to an extended state or a collapsed state, the folding hook structure comprising:

• a rotating disk, a folding hook groove being disposed on a disk surface of the rotating disk, the folding hook groove including a circumferential section extending in a circumferential direction of the rotating disk with the rotation center as a center, and a radial section extending from the circumferential section along a radial direction of the rotating disk;
• a folding hook, inserted in the folding hook groove, and arranged movable between a locked position and a released position along the radial direction of the rotating disk;
• and
• a sliding member movable between an extended position close to the rotating disk and a retracted position away from the rotating disk along the radial direction of the rotating disk;
• wherein, when the folding hook is in the circumferential section, the first object and the second object are in the extended state;
• and when the folding hook is in the radial section, the first object and the second object are in the collapsed state.