Display panel and wearable device

A display device, comprising:

• a middle frame assembly, comprising a fixed middle frame and a first sliding middle frame slidably connected to the fixed middle frame, wherein the fixed middle frame and the first sliding middle frame slide relatively in a first direction and form a middle frame assembly cavity, and the middle frame assembly cavity comprises a fixed middle frame cavity of the fixed middle frame;
• a flexible display screen, disposed on one side of the middle frame assembly and comprising a first free portion arranged corresponding to the first sliding middle frame, wherein the first free portion is curvable to be concealed in the middle frame assembly cavity;
• and
• a synchronized expansion mechanism disposed within the middle frame assembly cavity, the synchronized expansion mechanism comprising:
• a fixed pivot shaft extending along a second direction, disposed within the fixed middle frame cavity, wherein the second direction is perpendicular to the first direction;
• a first transmission component, wherein one end of the first transmission component is fixedly connected to the first sliding middle frame, and an opposing end of the first transmission component is movably connected to the fixed pivot shaft;
• and
• a first winding component, wherein one end of the first winding component is fixedly connected to the first free portion, and an opposing end of the first winding component is retractably connected to the fixed pivot shaft,
• wherein when the fixed pivot shaft rotates, the first transmission component and the first winding component move in synchronous linkage, the first transmission component drives the first sliding middle frame to slide relative to the fixed middle frame in the first direction, and the first winding component drives the first free portion to wind and retract to be at least partially concealed within the middle frame assembly cavity or to expand from the middle frame assembly cavity.