Abstract: Provided is a zipper structure for suitcases, including a zipper strip. The zipper strip includes a front chain belt and a rear chain belt, and also includes a front frame strip and a rear frame strip. The front frame strip is bonded on the front case of the suitcase by thermal pressing. The rear frame strip is bonded on the rear case of the suitcase by thermal pressing. The front chain belt is connected to the front frame strip through the front zipper fixing coil. The rear chain belt is connected to the rear frame strip through the rear zipper fixing coil. Also disclosed is a trolley bag utilizing the zipper structure for suitcases as described. The zipper structure and trolley bag as provided cancels the traditional manual sew process and realize the automatic production for zipper suitcases.

Abstract: Disclosed is a novel multi-class interlock. The interlock includes a main lock and a pair of main lock hooks adapted for the main lock. The main lock includes a main lock housing, a control mechanism, and a pair of main lock cylinder assemblies. The main lock cylinder assemblies and the control mechanism both are arranged within the main lock housing. The pair of main lock assemblies are located at both sides of the control mechanism, respectively. The control mechanism is capable of controlling the locking and unlocking of all of the main lock cylinder assemblies. The main lock hooks are provided with a plurality of first protruding teeth adapted for the main lock cylinder assemblies. The present invention provides a multi-class interlock which uses multiple-class interlocking to realize easy closing for the case.

Abstract: Provided is a zipper structure for suitcases, including a zipper strip. The zipper strip includes a front chain belt and a rear chain belt, and also includes a front rubber strip and a rear rubber strip. The front rubber strip is bonded on the front case of the suitcase by thermal pressing. The rear rubber strip is bonded on the rear case of the suitcase by thermal pressing. The front chain belt is connected to the front rubber strip through the front zipper fixing coil. The rear chain belt is connected to the rear rubber strip through the rear zipper fixing coil. Also disclosed is a trolley bag utilizing the zipper structure for suitcases as described. The zipper structure and trolley bag as provided cancels the traditional manual sew process and realize the automatic production for zipper suitcases.

Abstract: Provided is a trolley bag with separated middle frame structure and hinge and having shock-absorbing structure, which includes a trolley handle, a rear case, a middle frame, and a front case. The middle frame structure includes a hinge structure and a pair of middle frames. One of the pair of middle frames is connected to the rear case, and the other one is connected to the front case. The hinge structure includes a pair of hinges and a core pin, one of the pair of hinges is connected to one of the middle frames, the other is connected to the other one of the middle frames. The pair of hinges are movably connected through the core pin. The pair of middle frames is locked together by an interlocking assembly. Shock-absorbing wheels are arranged at four corners of a bottom of the trolley bag.