Sampling device for endocrinology department

The sampling device for the endocrinology department comprises a needle cylinder, a piston is installed in the needle cylinder in a sliding mode, the top of the piston is fixedly connected with a connecting rod, the lower end of the needle cylinder is communicated with a discharging pipe, the bottom of the needle cylinder is communicated with a collecting pipe, a locking structure is arranged on the connecting rod, and the locking structure comprises an L-shaped elastic piece. The lower end of the L-shaped elastic piece is fixedly connected to the connecting rod, an arc-shaped clamping groove is formed in the upper end of the inner wall of the needle cylinder, and the upper end of the L-shaped elastic piece is clamped in the arc-shaped clamping groove; according to the sampling device for the endocrinology department, secretions are collected through the collecting pipe, then the collected secretions are discharged out of the needle cylinder through the discharging pipe, the situation that the secretions are