| 摘要 |
A disk changer employs two disk guides that support a disk by its edge. A first guide has a revolving belt that frictionally engages the disk edge to roll it on a second guide. The edge fits into a channel of the second guide. The channel's access is defined by two opposing guiding surfaces. The channel's blind end has a resilient surface. Disks are inserted between the guides through an aperture guarded by a flap that opens outwardly and closes to prevent improper insertion of disks. The flap, urged by a spring, closes on the disk, riding along the back surface. A controller detects when the flap falls off the trailing portion to register position for position encoding. The shape of the resilient surface of the second disk guide corresponds to the position of the disk along a line of transport. Three transport zones are defined. In the first zone, closest to the insertion aperture, the surface is sloped to press the disk against the guiding surface opposite the flap to resist the moment generated by the pressure of the flap on the back of the disk. In the second zone, following the point at which the flap has fallen off the trailing edge, the surface is sloped to press the disk against the opposite guiding surface. In the third zone, the surface is vertical to allow the disk to pitch to an extent allowed by the spacing of the guiding surfaces, to align itself with a storage slot.
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