Rotating shaft mechanism and foldable terminal device

A foldable terminal device, comprising a flexible screen and a rotating shaft mechanism, wherein

• the rotating shaft mechanism comprises a main bracket and at least one rotating assembly, wherein each of the at least one rotating assembly can rotate relative to the main bracket, to switch between a folding state and an unfolding state, and a limiting structure configured to limit a maximum stroke of rotation performed by the rotating assembly relative to the main bracket is further disposed between the main bracket and the rotating assembly;
• in a coordinating structure formed by the main bracket and any of the at least one rotating assembly, a first rotation center and a second rotation center are formed on the main bracket, wherein each of the at least one rotating assembly comprises a rotating member, a middle frame, and a sliding member, a third rotation center is formed on the middle frame, and axes of the first rotation center, the second rotation center, and the third rotation center are parallel to each other;
• the rotating member comprises a first connecting portion, a second connecting portion, and a main body portion connected between the first connecting portion and the second connecting portion, wherein the first connecting portion can be rotatably connected to the main bracket about the first rotation center, and the second connecting portion can be rotatably connected to the middle frame about the third rotation center;
• one end of the sliding member can be rotatably connected to the main bracket about the second rotation center, the other end of the sliding member slidably coordinates with the middle frame, so that the middle frame is away from or close to the second rotation center along an extension direction of the sliding member;
• when the rotating assembly is in the unfolded state relative to the main bracket, a bearing surface of the main bracket and a bearing surface of the middle frame are located on a same plane;
• and
• the flexible screen is disposed on a side on which the bearing surface of the main bracket and the bearing surface of the middle frame are located.