Liquid injection device

A liquid injection device, comprising:

• a liquid injection assembly, the liquid injection assembly comprising a liquid injection body and a liquid injection head arranged on the liquid injection body;
• a first driving mechanism, configured to drive the liquid injection assembly to move;
• a carrying mechanism, configured to carry a replaceable wiping member, the carrying mechanism cooperating with the first driving mechanism, so that the liquid injection head comes into contact with a different position on the replaceable wiping member, and then the liquid injection head is wiped;
• and
• a second driving mechanism, the second driving mechanism being configured to drive one of the liquid injection head and the replaceable wiping member to rotate relative to the other after the liquid injection head is in contact with the replaceable wiping member;
• wherein:
• the liquid injection body comprises a cup portion and an adapter portion that are connected to each other;
• the cup portion defines a liquid injection cavity, and the adapter portion defines an accommodating cavity on a side of a bottom wall of the cup portion that faces away from the liquid injection cavity;
• the liquid injection assembly further comprises an adapter column rotationally supported in the accommodating cavity;
• the liquid injection head is disposed on an outer end surface of the adapter column that faces away from the liquid injection cavity and is disposed coaxially with the adapter column;
• the adapter column is provided with a liquid guiding channel;
• the bottom wall of the cup portion is provided with a liquid guiding hole in line with the liquid guiding channel;
• and
• the liquid injection head is in communication with the accommodating cavity via the liquid guiding channel and the liquid guiding hole.