Pneumatic push rod device of pulse diagnosis instrument and pulse condition signal collector with same

The pulse diagnosis instrument pneumatic push rod device comprises a piston cylinder, a piston rod, a spring and a pressure sensor. The piston cylinder is provided with a piston cavity, part of the piston rod is located in the piston cavity, the other part of the piston rod is located outside the piston cavity, and part of the piston rod is matched with the wall of the piston cavity. The pressure sensor is arranged at the end of the piston rod outside the piston cavity; an opening in one end of the air inlet communicates with the piston cavity, an opening in the other end of the air inlet communicates with the outside of the piston barrel, and the opening in the side, communicating with the piston cavity, of the air inlet faces the end, located in the piston cavity, of the piston rod; the spring is located in the piston cavity and sleeves the periphery of part of the piston rod, one end of the spring abuts against the side, away from the air inlet, of the piston cavity, and the other end of the spring abuts a