Nitrogen spring structure with overpressure protection

The utility model relates to the technical field of nitrogen springs, in particular to a nitrogen spring structure with overpressure protection, which comprises a cylinder barrel, a guide sleeve connected in the cylinder barrel and a plunger connected in the guide sleeve in a sliding manner, a groove in which the sealing ring can be embedded is formed in the outer side wall of the guide sleeve; a baffle ring is arranged on the side, away from the bottom of the cylinder barrel, of the sealing ring in the groove. At least one position cracking zone is arranged on the baffle ring; and the anti-pressure capability of the cracking zone is lower than that of other positions of the baffle ring. When the cylinder barrel is used, the breaking zone is arranged at the position of the baffle ring, a breakthrough opening is formed when the baffle ring is pressed, and the deflation time and the deflation time are judged according to the pressure generated by the internal air pressure of the nitrogen spring on the breaking