Patent ID: 7003788
Filing Date: 2006-02-21
Classification: G11B

Abstract:
1. A disc cartridge for housing a disc-shaped recording medium adapted for recording and/or reproducing information signals thereon when loaded in a recording and/or reproducing apparatus, comprising: a disc-shaped recording medium; a main cartridge body unit including a circular medium housing section for rotationally accommodating the disc-shaped recording medium and having an opening including a recording and/or reproducing opening portion for exposing at least a portion of the disc-shaped recording medium and a driving opening portion for allowing intrusion of rotation driving means for rotationally driving said disc-shaped recording medium, said recording and/or reproducing opening portion being formed continuous with said driving opening portion; and a shutter mechanism including a first shutter member for opening/closing a first opening portion formed at an inserting side of said opening which is firstly inserted into the recording and/or reproducing apparatus, and a second shutter member for opening/closing a second opening portion formed at a side opposite to the inserting side, said second shutter member primarily opening/closing said driving opening portion, wherein said first and second shutter members are substantially coplanar.