| 摘要 |
If a disk tray, i.e., a rotary tray, is undulated, it is impossible to stabilize a rotating torque of the disk tray, thus causing unevenness in rotation of the tray. A rotary tray is supported from below at a peripheral edge portion of its lower surface by means of rollers which are arranged at equal intervals on a circumference centered at a support shaft, and with a biasing force of a spring, the rotary tray is pressed toward an upper surface of a slide tray, so that the rotary tray is installed warpedly in a downwardly convex shape as a whole. Consequently, undulation of the rotary tray which occurred at the time of resin molding is eliminated and the rotary tray comes into uniform abutment against the rollers, whereby it becomes possible to stabilize the rotating torque of the rotary tray and eliminate unevenness in rotation of the rotary tray.
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