The utility model discloses a kind of anti-
choking instruments, including shell
assembly, the shell
assembly is equipped with face guard, negative pressure
assembly is equipped in the shell assembly, the shell assembly includes hollow upper
pipe body and lower
pipe body, the upper
pipe body is connected in lower pipe body, the lower pipe body is connected in face guard;Air inlet
check valve is equipped between the lower pipe body and face guard, air outlet
check valve is equipped in the air inlet
check valve side;The negative pressure assembly includes the
piston rod that can be moved up and down,
locking mechanism is equipped on the
piston rod, first sealing ring is equipped between the
piston rod and lower pipe body, the bottom end of the
piston rod is abutted on air inlet check valve;The bottom end of the
piston rod is equipped with reset slot, first elastic member is equipped in the reset slot, and the first elastic member is abutted on lower pipe body.The utility model is simple in structure, convenient to assemble, reduce production and maintenance cost, improve product stability and reliability.