| 摘要 |
<p>A disc cartridge for housing a magnetic disk of an increased recording capacity includes recording/reproducing apertures formed in the main cartridge body portion for exposing a portion of a signal recording area of the disc-shaped recording medium to outside across the inner and outer rims of the disc-shaped recording medium. The disc cartridge also includes a shutter member having shutter portions for opening/closing the recording/reproducing apertures and supporting portions provided on both sides of the direction of movement of the shutter portions and supported for movement by the main cartridge body portion and movement guide portions provided on both sides along the width-wise direction of the recording/reproducing apertures which is parallel to the movement direction of the shutter member. The supporting portions are engaged with the movement guide portion for movement. The recording/reproducing apertures are located so that one opening end facing the outer rim of the disc-shaped recording medium is located between the movement guide portions and a lateral side of the main cartridge body portion. The supporting portions of the shutter member are formed with cut-outs adapted for opening the recording/reproducing apertures as far as one opening edge of the apertures when the shutter member has been moved to a position of opening the recording/reproducing apertures.</p> |
