Sucker pressure relief device

The utility model relates to a suction cup pressure relief device. The suction cup pressure relief device comprises a suction cup, a rod body and a pressure relief assembly. The suction cup is arranged at one end of the rod body, a first air leakage groove is formed in the rod body, a first air hole is formed in the first air leakage groove of the rod body, and the first air hole penetrates through the rod body so that the air conveying pipeline can be communicated with the outside. The pressure relief assembly comprises a first pressure relief piece and a first blocking end, the first blocking end is arranged in the air conveying pipeline from the first air leakage groove, the first blocking end is in transmission connection with the first pressure relief piece, and the first blocking end can be driven by the first pressure relief piece to block the first air hole so as to seal the air conveying pipeline, so that the suction cup is kept in a vacuum suction state; the first blocking end can be driven by the f