Trolley bag with separated middle frame and hinge and having shock-absorbing structure

A trolley bag with separated middle frame structure and hinge and having shock-absorbing structure, comprising a trolley handle (2), a rear case (3), a middle frame (5), and a front case (9);

• the middle frame structure (5) includes a hinge structure and a pair of middle frames (51);
• one of the pair of middle frames (51) is connected to the rear case (3), and the other one is connected to the front case (9);
• wherein the hinge structure includes a pair of hinges (52) and a core pin, one of the pair of hinges (52) is connected to one of the middle frames (51), the other one of the hinges (52) is connected to the other one of the middle frames (51);
• the pair of hinges (52) are movably connected through the core pin;
• the pair of middle frames (51) is locked together by an interlocking assembly;
• shock-absorbing wheels (4) are arranged at four corners of a bottom of the trolley bag.