Patent ID: 8783432

Claim:
An ultralight suitcase comprising: a case framework; case material covered on the case framework; pull rods installed on the case framework; and wheels and supporting legs installed at the bottom part of the case framework, wherein the case framework comprises: upper connectors connected with the two ends of the pull rods; lower connectors connected with the wheels at the lower part of the case framework; upper corner connectors connected with the upper connectors and lower corner connectors connected with the lower connectors; the bottom parts of the lower corner connectors are connected with the supporting legs; the upper connectors and the lower connectors are connected through supporting connectors; the upper corner connectors and the lower corner connectors are connected through supporting connectors; the upper connectors are connected through supporting connectors; the lower connectors are connected through supporting connectors; the upper corner connectors are connected through supporting connectors; and the lower corner connectors are connected through supporting connectors; wherein outer tubes of the pull rods are connected between the upper connectors and the lower connectors; inner tubes of the pull rods are arranged inside the outer tubes; the pull rods are secured in the case framework through an upper cover plate; and the upper cover plates are fixedly connected with the upper connectors; and wherein locking pieces for locking positions of the pull rods are arranged on the upper cover plates; the locking pieces comprising a locking switch and a lock body; the locking switch is connected with the lock body; a limiting hole is arranged on the upper cover plate; and a limiting block that can extend into the limiting hole to limit the pull rods is arranged on the lock body.