Rotating shaft and terminal device

A terminal device, wherein the terminal device comprises a first body, a second body, and a rotating shaft;

• the rotating shaft comprises a central shaft, a first bracket, a second bracket, an elastic member and a concave cam assembly;
• the first bracket is rotatably mounted on the central shaft the second bracket is fixedly connected to the central shaft the elastic member is disposed on the central shaft, wherein the elastic member is a hollow cylinder of an integrated structure, and a hollowed-out hole is disposed on a cylinder wall of the cylinder;
• and the concave cam assembly is disposed on the central shaft, wherein the concave cam assembly may enable the elastic member to be deformed;
• the first body is fixedly connected to the first bracket, and the second body is fixedly connected to the second bracket;
• and when the first bracket rotates relative to the second bracket, the concave cam assembly generates an extrusion force acting on the elastic member, so that the elastic member in a hollowed-out shape is deformed, and then a specific included angle is formed between the first bracket and the second bracket.