Hinge mechanism

The invention discloses a hinge mechanism, relating to the technical field of automotive spare parts, and used for solving the technical problem that the existing arch-shaped hinge mechanism cannot realize multi-stage location for a trunk cover. The hinge mechanism comprises an arch-shaped swing arm, wherein the arch-shaped swing arm is a telescopic structure composed of a sleeving rod and a retreating rod, the first end of the sleeving rod is hinged on an automotive body, the first end part of the retreating rod is fixed on the trunk cover, and the retreating rod is inserted into the sleeving rod via the second end part of the sleeving rod, from the own second end part; and a plurality of limit holes are formed in the tube wall of the sleeving rod along the stretching-retreating direction of the retreating rod, a limit body is arranged on the retreating rod, and the limit body is selectively inserted into one of the plurality of limit holes. The hinge mechanism disclosed by the invention is applied to openin