Ink ribbon feeding mechanism and tape printing apparatus

A tape printing apparatus comprising:

• a cartridge mounting section where a cartridge including a paying out core around which an ink ribbon is wound and in which a plurality of core side engaging portions and a plurality of core side insertion recessed portions are alternately provided in a circumferential direction is mounted;
• a paying out shaft provided in the cartridge mounting section;
• a paying out rotor which is rotatably provided to the paying out shaft and is inserted into the paying out core when the cartridge is being mounted in the cartridge mounting section;
• a plurality of rotor side engaging portions which are provided on an outer circumferential surface of the paying out rotor so as to protrude in a radial direction and which engage with the plurality of core side engaging portions when the paying out rotor rotates;
• and
• a print head that holds the ink ribbon and a print tape between the print head and a platen roller and performs printing on the print tape, wherein
• the plurality of rotor side engaging portions have an butting portion provided in an opposite direction of a mounting direction of the cartridge, and when the cartridge is being mounted in the cartridge mounting section, if the core side engaging portion provided in the mounting direction of the cartridge butts against the butting portion, at least one of the paying out core and the paying out rotor rotates, so that the rotor side engaging portion is inserted into the core side insertion recessed portion, and
• a plurality of the butting portions are provided in positions different from each other in the mounting direction of the cartridge.