Light-proof infusion apparatus

The utility model provides a light-proof infusion apparatus which comprises a drip chamber, the drip chamber comprises a chamber body, a liquid inlet pipe is arranged at the top of the chamber body, a liquid outlet pipe is arranged at the bottom of the chamber body, the top of the liquid outlet pipe extends into the chamber body, a liquid outlet is formed in the side face of the liquid outlet pipe, limiting blocks are arranged on the upper side and the lower side of the liquid outlet of the liquid outlet pipe, and a plugging block is arranged between the two limiting blocks in a sliding and sleeved mode. The plugging block is connected with a floating ball through a tether; the density of the plugging block is larger than 1.1 g/cm < 3 >, and the average density of the plugging block, the floating ball and the tether is smaller than 1.03 g/cm < 3 >. When liquid medicine in a medicine bottle is used up, the liquid level in the drip chamber can slowly descend at the moment, the floating ball is made to move down