Driving mechanism of drug infusion device

A drive mechanism of a drug infusion device, comprising:

• at least one driving unit and at least one driving wheel, wherein the driving unit, moving in a driving direction, drives the driving wheel to rotate;
• a linear actuator, electrically connected with the driving unit, pulling the driving unit to move in the driving direction after being powered;
• a switch unit group, comprising a first switch unit and a second switch unit, the first switch electrically connected with the linear actuator;
• a power supply, wherein the power supply, the switch unit group and the linear actuator are electrically connected to form a power supply circuit that supplies power to the linear actuator, when the linear actuator is powered, the driving unit implements driving, and the driving unit triggers a first signal, indicating an end point of the driving direction, the first switch unit receiving the first signal to turn off the power to the linear actuator;
• and
• a program unit, including a timer electrically connected to the second switch unit, the timer controlling the second switch unit to turn off the power supply circuit.