| 摘要 |
In a disc cartridge for an optical disc and the like, to increase stiffness in an opening for a record and reproduction mechanism. A disc cartridge 10 has an upper shell 12 , a center frame 14 , and a lower shell 16 clamped to one another. A center frame opening 20 and a lower shell opening 22 expose a recording surface of a recording medium contained between the center frame 14 and the upper shell 12 downwardly, and a reinforcing member 24 integrally couples the ends of the center frame opening 20, and a lower shell reinforcing member 26 integrally couples the ends of the lower shell opening 22.
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