Infusion device

The utility model provides an infusion device. According to the infusion device, the push rod and the transmission unit are movably connected in the axial direction, the push rod is used for driving the piston to move towards the liquid medicine output end, and the push rod can be detached from the transmission unit. On the basis, after the liquid medicine is completely infused, the piston and thepush rod can be replaced together with the liquid storage unit, and the problem that the infusion precision is poor due to the fact that components such as the piston are abraded after being used fora long time is solved; moreover, after the liquid storage unit is replaced, the transmission unit only needs to perform circumferential reset operation, so that the abrasion of the transmission unitand the driving unit is favorably relieved, the power consumption of the driving unit is reduced, and the service life of the driving unit is prolonged. 本实用新型提供了一种输注设备。本实用新型提供的输注设备中，推杆与传动单元之间为轴向可移动连接，并用于驱动活塞向药液输出端移动，其中推杆可以实现从传动