Device for fixing platen roller for printing apparatus and printing apparatus including the same

A printing apparatus that performs printing through a thermal head while pulling printing paper through a platen roller that is rotatably installed in a housing and rotated by a driving member and cuts the printing paper, discharged from the housing, through a cutter operated by the driving member, the printing apparatus comprising:

• a fixing frame installed in the housing;
• roller bearings respectively coupled to both ends of the platen roller in a longitudinal direction of the platen roller, and configured to allow the platen roller to be rotated;
• bearing holders installed on the fixing frame, and configured to provide coupling portions for the roller bearings and to allow the roller bearings to enter and exit in a horizontal direction corresponding to the longitudinal direction of the platen roller;
• a locking part configured to fix the platen roller and the roller bearings to the bearing holders in a state of preventing horizontal movement of the platen roller and the roller bearings while restraining at least one of the both ends of the platen roller to the bearing holder,
• a pair of curling prevention members installed in the housing, disposed upstream of the platen roller and downstream of the platen roller, respectively, in a direction in which the printing paper is transferred, and configured to prevent the printing paper from being curled on the platen roller while exposing only a part of the platen roller;
• and
• a curling prevention connector configured to detachably couple at least one of the pair of curling prevention members to the housing and to form an entrance for the platen roller for detachment and attachment of the platen roller while allowing separation of the curling prevention members,
• wherein the curling prevention connector comprises:
• a hook slot provided in the housing, and configured to provide a fitting portion;
• and
• a snap hook formed on the curling prevention member, and configured to be inserted and coupled into the hook slot in a snap manner.