Chest X-ray automatic-control photographic tape

The utility model discloses a chest X-ray automatic-control photographic tape, which is characterized by consisting of a tape box body 1, laces 2 and 2', an inspiratory-capacity maximum positioning shaft 3, an elastic band 4, a sliding shaft 5, a sliding block 6, a pull spring 7, touch plates 8 and 8' and lead wires 9 and 9', wherein the tape box body 1 is formed by sewing up two layers of non-woven fabrics, the inspiratory-capacity maximum positioning shaft is installed inside the tape box body 1, two ends of the inspiratory-capacity maximum positioning shaft are clamped inside the elastic band 4 of the tape box body 1, one end of the sliding shaft 5 is connected with the lace 2 through a through hole of the inspiratory-capacity maximum positioning shaft 3 and a through hole of the tape box body 1, the other end is connected with the sliding block 6, the outer wall of the tape box body 1 is provided with the lace 2', the touch plates 8 and 8' are respectively fixed on the inspiratory-capacity maximum positio