Hinge and mobile terminal having inward-foldable flexible screen

1. A hinge, comprising a left rotating support and a right rotating support, the left rotating support and the right rotating support can respectively rotate with a first axis and a second axis as axes respectively, the first axis and the second axis are parallel, a synchronous reverse rotation connecting mechanism is connected between the left rotating support and the right rotating support to perform synchronous reverse rotation; wherein:

the hinge is further provided with a left middle rotating supporting component and a right middle rotating supporting component; the rotation axis of the left middle rotating supporting component is parallel to or coincides with the first axis, and the rotation axis of the right middle rotating supporting component is parallel to or coincides with the second axis;

the left rotating support and the right rotating support are respectively provided with supporting parts for the left middle rotating supporting component and the right middle rotating supporting component during being unfolded;

the left middle rotating supporting component and the right middle rotating supporting component are separately connected to an elastic component; and when the hinge is folded, the elastic component drives the left middle rotating supporting component and the right middle rotating supporting component to downwardly rotate so as to rotate into a middle housing.

2. The hinge of claim 1 , wherein the hinge is provided with a first shaft and a second shaft, both the left middle rotating supporting component and the left rotating support are sleeved on the first shaft, the left rotating support and the first shaft are connected together to rotate synchronously, and the left middle rotating supporting component is rotatably connected to the first shaft; both the right middle rotating supporting component and the right rotating support are sleeved on the second shaft, the right rotating support and the second shaft are connected together to rotate synchronously, and the right middle rotating supporting component is rotatably connected to the second shaft.

3. The hinge of claim 2 , wherein an elastic component of the left middle rotating supporting component is a torsional spring, and an elastic component of the right middle rotating supporting component is a torsional spring and the elastic components are connected together to be an integral spring, two end arms of the spring are connected to the left middle rotating supporting component and the right middle rotating supporting component respectively.

4. The hinge of claim 3 , wherein the integral spring is provided with a left spring coil and a right spring coil, and the left spring coil and the right spring coil are sleeved outside the first shaft and the second shaft respectively.

5. The hinge of claim 1 , wherein when the hinge is folded, the left middle rotating supporting component and the right middle rotating supporting component are driven by the elastic component to downwardly rotate into the middle housing until being blocked by a limiter, in the process from unfolding to folding of the hinge, rotation angles of the left middle rotating supporting component and the right middle rotating supporting component are smaller than rotation angles of the left rotating support and right rotating support respectively; in the process from folding to unfolding of the hinge, when the supporting parts of the left rotating support and the right rotating support are rotated to contact the left middle rotating supporting component and the right middle rotating supporting component respectively, the supporting parts drive the left middle rotating supporting component and the right middle rotating supporting component to rotate to a support position of the flexible screen, and in the support position of the flexible screen, the elastic component compresses the left middle rotating supporting component and the right middle rotating supporting component.