by the positioning groove 183 and the support 17 is held firmly against the body 11 in the container 19 which completes folding of the leg 12 although the present invention described above in terms of the preferred embodiment uses a sharp cornered rectangular shape for the flanges 182 and the spring strip 152 as an example the flanges 182 and the spring strip 152 could also have a rounded shape as shown in fig5 the rounded shape reduces rubbing between the flanges 182 and the spring strip 152 while still achieving the effect and goal of the present invention and also falls within the art of the present invention thus through the positioning of the stopper 15 and the positioning grooves 183 the stopper 15 of the present invention hinge positioning structure 10 can restrict rotation of the leg 12 providing a strong support such that the stable positioning of the leg 12 can hold a heavier body simultaneously the flange 182 and the spring strip 152 form a rectangular contact surface which distributes weight from the body which reduces stress to the flange 182 and the spring strip 152 thereby reducing wear between the components and increasing the life of the product the hinge positioning structure 10 also can use a smaller leg 12 relative to the weight supported compared.