Case for containing a disk cartridge

A case for containing a disk cartridge, in which the disk cartridge is inherently provided with at least one recess formed on a bottom surface thereof, the case comprising:

• an upper case member;
• a lower case member;
• a pivoting mechanism pivoting the lower case member on the upper case member to form a substantially hollow parallelepiped which defines a chamber therein and has an inserting opening, such that the disk cartridge is adapted to be inserted through the inserting opening and received in the chamber;
• a fastening mechanism, disposed between the upper case member and the lower case member to retain the upper case member with the lower case member;
• cartridge retaining means, having at least one arm resiliently biasing upward, the at least one arm having two opposing ends with one end thereof extending from the bottom plate of the lower case member and the other end provided with a protrusion;
• when the disk cartridge is completely inserted into the chamber of the case, the protrusion is adapted to be allocated in the recess formed on the bottom surface of the disk cartridge, whereby securely positioning the disk cartridge in the case.