Nesting principle of new schoolbag

The schoolbag is vertically installed in the middle of the top of the base and fixedly connected with the base through screws. The side of the schoolbag is provided with a zipper, which is connected with the schoolbag through sewing thread. The side of the schoolbag is provided with a waterproof layer which is bonded with the schoolbag by glue. One side of the schoolbag is provided with two symmetrically distributed suspenders which are connected with the schoolbag through sewing thread. The universal wheel can roll the new schoolbag, and the connecting shaft can rotate the telescopic rod, so that the universal wheel can be put in.