Self-locking tray

The utility model discloses a self-locking tray, and relates to the technical field of trays. The self-locking material disc comprises a material disc body and a self-locking structure, a material disc positioning table is arranged on one side of the material disc body in a protruding mode, the material disc positioning table is provided with a mounting cavity, a first channel and a second channel, the first channel and the second channel communicate with the mounting cavity and the outside, and the first channel and the second channel are arranged on the two opposite sides of the mounting cavity; the self-locking structure comprises a connecting plate rotationally mounted in the mounting cavity, a trigger rod hinged to one end of the connecting plate and arranged in the first channel in a sliding manner, a self-locking rod hinged to the other end of the connecting plate and arranged in the second channel in a sliding manner, and an elastic piece arranged in the mounting cavity; when the trigger rod is presse