The hinge of the flexible screen can be bent freely, which enables the display-type smart terminal products to get rid of the inherent rigid structure and realize more diversified structural forms, such as curved shapes, curled screen storage, etc. , Thereby reducing the volume of display terminal smart terminal products, has become an important development direction of smart terminal products. However, because the flexible screen cannot be folded in half, nor can it withstand tension and compression, the flexible screen must be used with a suitable supporting structure.