Printer module including movable blade module and fixed blade module

A printer apparatus, comprising:

• a case;
• a rotationally openable lid that rotatably opens and closes with respect to the case;
• a fixed blade module having a fixed blade and a locking part, and mounted on the case;
• and
• a movable blade module including a movable blade module main body, a movable blade and a bulging portion formed as a portion of the movable blade module main body, and mounted on the rotationally openable lid, the movable blade module configured to be joined to the fixed, blade module upon closing the rotationally openable lid such that the movable blade and the fixed blade face each other,
• wherein the movable blade module mounted on the rotationally openable lid is configured to be movable relative to the rotationally openable lid;
• and
• the bulging portion is positioned relative to the fixed blade, and upon joining the movable blade module to the fixed blade module, the edge of the bulging portion is brought into contact with the locking part such that an angle between the movable blade and the fixed blade is set to a predetermined angle.