Combined copying machine metal hinge

The invention discloses a combined copying machine metal hinge which comprises a first gasket, the first gasket is connected with a first connector, and the end, away from a clamping cavity, of the first connector is rotationally connected with a rotating shaft; Second connectors are symmetrically connected to the periphery of the rotating shaft in a matched mode. The tail end, away from the rotating shaft, of the second connector is provided with a second gasket in limiting fit. Annular grooves used for coaxial rotation of the two second connectors are formed in the end faces opposite to the second connectors in an embedded mode, fourth limiting sliding grooves are formed in the annular grooves, and limiting assemblies are symmetrically connected to the side faces, opposite to each other, of the two second connectors. When the tail end of the limiting assembly is matched with the second gasket, the tail end of the second connector is located on the side, relatively away from the two sets of fourth limiting s