| 摘要 |
A cartridge to accommodate optical discs of different sizes. The cartridge includes a main case including an upper and a lower plates. An optical disc of a larger diameter is inserted directly into the main case, and an optical disc of a smaller diameter is inserted into an auxiliary case, such that the auxiliary case is received by the main case. A main shutter is movably installed on the main case, and the auxiliary case has an auxiliary shutter in which a shutter protrusion is formed. As the shutter protrusion is inserted into the main shutter, the auxiliary shutter is opened/closed by operation of the main shutter. The main case is formed with first ribs in a circular arc shape in which the optical disc of the larger diameter is accommodated, and a cover, to prevent the larger optical disc and the auxiliary case from being released therefrom, is pivotably installed on the main case. The cover is formed with second ribs in the circular arc shape. The first ribs have respectively first receiving recesses and the second ribs have second receiving recesses, and the auxiliary case is maintained in position inside the main case after being inserted into the first and the second receiving recesses.
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