Patent ID: 7345962

Claim:
A disk drive device in which a signal detection section that detects a disk signal and a disk ejection mechanism that ejects a disk are connected to a control device having input means, characterized in that said control device comprises: mechanism control means that controls drive of said disk ejection mechanism; and authentication control means that, in a condition in which there has been no manual input operation from said input means, and a pre-set time length has elapsed, outputs a disk ejection instruction to said mechanism control means only if a disk ejection instruction and the authentication information are input; said authentication control means comprises an authentication information storage section that stores prescribed authentication information; said authentication information is disk-specific information that is detected by said signal detection section and stored in said authentication information storage section; said disk-specific information is selected from one or more of the disk title, file name, holder name, table of contents information and playing time; and including a display screen for displaying disk-specific information when a disk is inserted into the disk drive device and a user is enabled to select, only from the disk-specific information, the authentication information to be stored by said input means in the authentication information storage section from the selected disk-specific information.