| 摘要 |
A paper tray supporting structure includes a rotating shaft connecting each of lateral portions of a paper tray and a paper tray holding portion, a guide groove provided at the paper tray holding portion and formed to have an approximately circular arc shape whose center is at the center of the rotating shaft, a pair of arms projecting from the lateral portions of the paper tray, respectively, approximately in parallel to a direction of a normal to a plane of the paper tray for carrying paper thereon, and a mating protrusion projecting from a tip of each of the arms toward the guide groove and pressing a bottom of the guide groove and sliding thereon as the paper tray turns. At the bottom of the guide groove are provided a first convex portion and a second convex portion to mate with the mating protrusion to place the paper tray in a retracted position and a released position, respectively. When the paper tray is turned between the retracted position and the released position, appropriate frictional force can be applied.
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