Resonant level switch structure

A resonant level switch structure comprises a detection part, a driving part and a balance assembly. A detection rod of the detection part comprises an outer pipe and an inner pipe connected in the outer pipe in a suspended mode, the balance part is arranged in the inner pipe and comprises a balance weight piece and a pressing piece screwed into the balance weight piece, the balance weight piece is provided with a connecting part, an opening part extending out of the connecting part and a pressing-in hole penetrating through the connecting part and the opening part, and the pressing-in hole penetrates through the connecting part and the opening part. The pressing piece is arranged in the counterweight piece through the pressing hole; wherein the distraction part is provided with one or more inwards-shrinking grooves which extend in the axial direction and are communicated with the forcing hole, and when the forcing piece extends into the distraction part, the distraction part is distraction outwards towards t