Device for selecting a surface of a disc in a cartridge

A disc cartridge comprising:

• a casing comprising an upper cover plate and a lower cover plate joined together to define a space therein;
• a disc rotatably housed in said space of said casing;
• at least one window provided in said casing;
• a shutter for operating said at least one window to permit insertion of a disc drive mechanism of a disc player therethrough into said disc cartridge;
• an actuator slidably arranged in said casing and engaged with said shutter to releasably lock said shutter;
• a disc receiver operatively connected to said actuator and selectively receiving therein a part of a peripheral portion of said disc, said disc receiver being arranged in said casing to release or receive said disc when moved by said actuator;
• a write enable plug, a display section for indicating the operation of said plug and a detection hole provided at each of said upper and lower cover plates;
• said display section and detection hole of said upper cover plate being arranged opposite to said detection hole and display section of said lower cover plate, and said write enable plug being arranged so as to be slidable with respect to said detection hole to thereby open or close said detection hole;
• and
• operation means for slidably actuating said write enable plug, said operation means being arranged so as to be operated from outside said casing.