Sucking disc mechanism of automatic base plate feeding robot and plate sucking and releasing method

The invention discloses a suction cup mechanism of an automatic base plate feeding robot and a plate sucking and releasing method. The suction cup mechanism comprises a suction cup and a suction cup air suction assembly. The suction cup air suction assembly is located over the suction cup and communicated with the suction cup to be used for extracting or filling air between the contact faces of the suction cup and the base plate so that the pressure between the contact faces of the suction cup and the base plate can be reduced or increased, and the suction cup can be tightly attached to the contact face of the base plate or attached to the base plate under the action of atmospheric pressure. And the contact surface is separated. According to the invention, the interior of the main sucker is changed into the branch suckers arranged in the array, so that the unique main adsorption force of the main sucker can be effectively dispersed into the branch adsorption forces arranged in the array; the adsorption forces