Patent ID: 7817521

Claim:
An information recording/reproducing device provided with a tray having a disk placing section on which a disk, that is a disk-like recording medium, is placed and a holder that overhangs a part of the disk placing section for holding the disk on the disk placing section with a vertically-installed state, wherein the tray is moved between a loadable/unloadable position of the disk and a position for recording or reproducing information to the disk, the information recording/reproducing device comprising: a rotating unit that rotates the disk; a rotation number measuring unit that measures the rotation number of the rotating unit; a counting unit that counts an elapsed time from the start of the rotating unit; a data storing unit that stores beforehand a threshold value for detecting an abnormal loading state of the disk placed on the disk placing section via the holder according to the rotation number of the rotating unit at the time when the elapsed time counted by the counting unit reaches a predetermined time; and a comparing unit that compares the rotation number measured by the rotation number measuring unit and the threshold value stored beforehand in the data storing unit, when the predetermined time has elapsed from the start of the rotating unit, and outputs an abnormality detecting signal when the rotation number is smaller than the threshold value, wherein: the holder is a disk holder that is urged by a spring in a direction vertical to the placing face of the tray and that is retractable from the placing face of the tray as pushed by a cartridge placed on the placing face of the tray, and a rotation restricting unit that restricts the rotation of the disk by the rotating unit upon the abnormal loading state of the disk is provided at the section of the holder that comes in contact with the disk.