Paper feeding apparatus and image forming apparatus adopting the same

摘要

A paper feeding apparatus includes a pickup roller, a knock-up plate to accommodate recording media thereon and capable of moving to a pickup position and a release position, a forward roller to transfer a recording medium picked up by the pickup roller, a retard roller capable of moving to a contact position and to a separation position, a first control unit to move the knock-up plate to the pickup position and the release position, and a second control unit to move the knock-up plate to the contact position and the separation position, wherein the first control unit and the second control unit are driven by a single driving motor.

主权项

1. A paper feeding apparatus comprising:
a pickup roller disposed on a first shaft; a knock-up plate to accommodate recording media thereon and to move between a pickup position at which a recording medium contacts with the pickup roller and a release position at which the recording medium and the pickup roller are separated from each other; a forward roller disposed on a second shaft different from the first shaft to transfer a recording medium picked up by the pickup roller; a retard roller to move between a contact position at which the retard roller contacts with the forward roller to prevent a multiple-paper transfer by applying a frictional force to a rear side of a recording medium being transferred between the retard roller and the forward roller and a separation position at which the retard roller is separated from the forward roller, the retard roller being disposed on a third shaft below the first and the second shafts; a first control unit to move the knock-up plate to the pickup position and the release position; and a second control unit to move the retard roller to the contact position and the separation position, wherein the first control unit and the second control unit are assembled with and in contact with different portions of a driving axle driven by a single driving motor so as to be spaced apart from each other along the driving axle, such that the retard roller is disposed above the driving axle with respect to a direction perpendicular to a recording medium transfer direction.