Novel limiting structure and PCB

The utility model relates to a novel spacing structure and a PCB, including a mounting seat and two connecting seats arranged at the top of the mounting seat, the tops of the two connecting seats are provided with clamping frames through elastic members, the inner walls of the two clamping frames are both provided with buffer airbags, one side of each clamping frame is provided with two chutes, and the two chutes are arranged on the top of the mounting seat. The distance between the two clamping frames is adjusted according to circuit boards of different specifications, the adjusting rod is rotated to drive the connecting base to move in the groove, then the two clamping frames are controlled to clamp and fix the circuit boards, and through four dampers installed between the clamping frames and the connecting base, the circuit boards can be clamped and fixed by the two clamping frames. Four dampers are arranged on the clamping frame, supporting springs arranged on the surfaces of the four dampers in a sleevin