| 摘要 |
DISCLOSED IS A DISC CARTRIDGE INCLUDING A MAIN CATRIDGE BODY UNIT (5) IN WHICH IS ROTATABLY HOUSED AN OPTICAL DISC (2). THE DISC CATRIDGE INCLUDES A RECORDING AND/OR REPRODUCING APERTURE (13) FOR EXPOSING A PORTION OF THE OPTICAL DISC TO OUTSIDE ACROSS THE INNER AND OUTER RIMS OF THE DISC, A SHUTTER UNIT (15) MOUNTED FOR MOVEMENT TO THE MAIN CARTRIDGE BODY UNIT FOR OPENING/CLOSING THE RECORDING AND/OR REPRODUCING APERTURE AND A LOCK UNIT (27) FOR LOCKIING THE SHUTTER UNIT (15) IN A POSITION OF CLOSING THE RECORDING AND/OR REPRODUCING APERTURE. THE LOCK UNIT INCLUDES A LOCK MEMBER (28), ROTATABLY MOUNTED TO THE SHUTTER UNIT, AND AN ENGAGING PART (29), PROVIDED TO THE MAIN CARTRIDGE BODY UNIT, SO AAS TO BE ENGAGED BY THE LOCK MEMBER (28).
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