Simple and portable sputum suction device

The utility model relates to the technical field of medical instruments, in particular to a simple portable sputum suction device which comprises a sputum collecting pot, a piston cylinder and a piston rod, a connecting block A is arranged on the upper surface of the sputum collecting pot, a connecting block B is arranged on the upper side of the connecting block A, and a sputum suction pipe is fixedly connected to the upper surface of the connecting block B. The portable sputum suction device is simple in structure, a patient can hang the portable sputum suction device on the body through the hanging rope, when the patient needs to suck sputum in the walking process, the end of the sputum suction pipe can be placed in the oral cavity, then the piston rod is pressed downwards, air in the piston cylinder is exhausted from the position of the connecting pipe B, and the sputum suction device is convenient to use. Then, the piston rod can be lifted upwards under the action of the elastic force of the spring D, th