Mechanism for protecting proximity switch

The utility model relates to the technical field of welding equipment, in particular to a mechanism for protecting a proximity switch, which comprises a driving piece, a mounting block, a support, an abutting piece, a connecting piece, a pressing cylinder, an induction piece, a trigger rod and an auxiliary spring, the driving piece is used for driving the support on the mounting block to move horizontally, and the connecting piece is used for supporting the pressing cylinder and the induction piece. When a part is placed and welded, the driving piece is controlled to drive a support on the mounting block to move a pressing barrel on a connecting piece to be close to the surface of the part, finally, an auxiliary spring in the pressing barrel makes contact with the surface of the part to drive a trigger rod to backwards abut against the induction piece, and the induction piece receives a switch signal and then welds the workpiece. The induction piece is not in direct contact with the part, the switching effect