| 摘要 |
PROBLEM TO BE SOLVED: To simply and surely center two kinds of large and small disks inserted in the apparatus at a prescribed position. SOLUTION: A movable tray 4 elastically energized upward is arranged at a position opposed to a disk insertion port so as to be freely elevated and lowered; a 1st positioning groove 17 for positioning the small diameter disk SD and a 2nd positioning groove 18 for positioning the large diameter disk LD are formed with a step; a pair of 1st inclined planes and a pair of 2nd inclined planes are formed outside both of these 1st and 2nd positioning grooves 17, 18; both of the 1st inclined planes are made to continue from the front end face of the movable tray 4 up to the outer peripheral edge of the 1st positioning groove 17; both of the 2nd inclined planes are made to continue from the front end face of the movable tray 4 up to the outer peripheral edge of the 2nd positioning groove 18; and thus, the disk positioning mechanism is configured so as to smoothly guide the two kinds of small and large disks D up to the 1st and 2nd positioning grooves 17, 18 using the 1st and 2nd inclined planes as guide planes. COPYRIGHT: (C)2006,JPO&NCIPI
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