Back plate structure and flexible display device

A flexible display device, comprising:

• a back plate structure comprising a first back plate, a second back plate and a flexible shaft, wherein, the first back plate and the second back plate are connected by the flexible shaft;
• the flexible shaft comprises an arch component and at least one end component;
• the arch component comprises a concave surface and a convex surface corresponding to the concave surface, and the concave surface faces a bending direction of the flexible display device;
• each end component is located at an end of the arch component and obscures a space formed by the arch component;
• and
• the end component comprises at least one foldable structure, and each foldable structure comprises two planes parallel to a bending axis of the flexible display device;
• wherein the end component further comprises a partition, both ends of which are connected to the first back plate and the second back plate respectively;
• the at least one foldable structure comprises a plurality of V-shaped structural layers, each V-shaped structural layer comprises a plurality of V-shaped units, an opening of each V-shaped unit faces the first back plate or the second back plate;
• one end of the V-shaped unit is connected to an end surface of the arch component, and the other end of the V-shaped unit is connected to a surface of the partition adjacent to the arch component;
• the plurality of V-shaped structural layers are arranged in layers on the surface of the partition adjacent to the arch component, and V-shaped units in two adjacent V-shaped structural layers are alternately arranged;
• and
• a display panel, disposed on one side of the concave surface of the back plate structure.