Chest lead suction ball for electrocardiograph special for children

The utility model discloses a chest lead suction ball for a special electrocardiograph for children, and relates to the technical field of medical instruments. According to the scheme, the device comprises a negative pressure suction bag and a pressing balloon, the top end of the negative pressure suction bag is fixedly communicated with a first supporting column, the left side and the right side of the first supporting column are fixedly connected with guide connectors of different specifications respectively, and the top end of the first supporting column is fixedly communicated with a threaded pipe; the inner wall of the threaded pipe is fixedly connected with a second supporting column through a plurality of evenly-distributed adapting pipes. By arranging the pressing balloon, an anti-skid pipe sleeve below the pressing balloon and a threaded pipe above the negative pressure suction bag can be spliced and detached, when a first limiting plate enters a third cavity, a sliding outer plate slides on a suppor