The present application relates to a kind of anti-tamper device, including rear shell, gland, upper plate, lower plate, hanging plate, seal cylinder cover, seal cylinder, seal, push rod box, track slot, compression spring push rod, compression spring push rod push block, cover plate, connecting rod support, left connecting rod, right connecting rod, left ink pad box bottom shell and right ink pad box bottom shell, the inner wall of rear shell is equipped with the vertical
solid fixed rectangular groove, the upper section of push rod box is equipped with the longitudinal push rod box opening, the inner wall of push rod box close to push rod box opening is equipped with compression spring push rod
support surface, compression spring is equipped between the gland and upper plate and is sleeved on the outside of compression spring push rod, the gland is hinged with compression spring push rod by pin shaft, push rod
torsion spring is installed on pin shaft, one end of push rod
torsion spring is fixed with compression spring push rod, the other end of push rod
torsion spring is fixed with gland.The present application has multiple anti-tamper function, can effectively prevent illegal operation, improve the security of seal
control system, the present application is simple in structure, reliable and ingenious, easy to maintain.