Side holding structure and thermal transfer printing device

A thermal transfer printing device, characterized in that it comprises:

• a base frame;
• a housing, mounted on the base frame, wherein side openings are arranged on its opposite sides, and a plurality of snap joints are arranged on the edge of the side openings;
• holding covers, comprising a ring mouth portion and a cover wall of the grip groove that is connected to the rear side of the ring mouth portion and concave inward, a plurality of hooks detachably connected to the plurality of snap joints arranged on the inner side of the ring mouth portion, and at least one positioning groove arranged on the top outside of the cover wall;
• a top cover, detachably connected to the top side of the housing, wherein at least one inserting portion fitted to the positioning groove is arranged on the edge, an inserting mouth for the inserting portion to pass through is arranged on the top side of the housing, and the inserting portion is detachably inserted into the positioning groove through the inserting mouth;
• a hot plate assembly, mounted on the underside of the base frame, generates heat required for thermal transfer printing when energized.