A rotating shaft mechanism, including a mounting base and at least one rotating assembly each of which includes two rotating modules; a rotating module includes a supporting plate, a sliding plate and an elastic pressing mechanism; the supporting plate is rotatably connected to the mounting base; a surface of the supporting plate is provided with a first limiting portion and a second limiting portion; the first limiting portion and the second limiting portion are provided at intervals along the first direction; a portion of the sliding plate is rotatably connected to the mounting base, and another portion of the sliding plate is slidably connected to the supporting plate; and a distance between the end of the sliding plate away from the mounting base and the second limiting portion is proportional to a maximum angle to which the supporting plate is able to rotate.