MEDIA CARTRIDGE AND DRIVER FOR THE SAME

摘要

[PROBLEMS] To provide a media cartridge which can perform open/close operation of a shutter quickly and is suitable for miniaturization. [MEANS FOR SOLVING PROBLEMS] When a media cartridge (1A) is loaded to a loading section, the small diameter gear (5b) of a pinion gear (5) meshes a second rack (11). When a case (3) is pushed in the Y2 direction, the small diameter gear (5b) rolls the second rack (11). A large diameter gear (5a) rolls a first rack (7) provided in a shutter (6) but the shutter (6) is moved at a speed of Ra/Rb times, where the Ra/Rb is the ratio of radial dimension between the large diameter gear (5a) and the small diameter gear (5b). Consequently, the shutter (6) can be moved ahead of the case (3) and open/close operation of the shutter (6) can be performed quickly. Since a region for making the shutter (6) retreat is not required to be secured previously on the media cartridge (1A) side, the media cartridge (1A) can be miniaturized.