Patent ID: 6991227

Claim:
A sheet feeding apparatus for a printing device having a tray and a sheet feeding path, comprising: a pickup roller picking up a sheet loaded on the tray to feed the sheet into the sheet feeding path; a feeding roller receiving the sheet picked up by the pickup roller to introduce the sheet into the sheet feeding path; a rotation shaft connected to a rotation power source to rotate the feeding roller; a rotation member installed on the rotation shaft to support the pickup roller disposed at a free end of the rotation member and to rotate with respect to the rotation shaft; a relay gear installed in the rotation member to engage the feeding roller and the pickup roller; a clutch unit selectively transferring a rotation force of the rotation shaft to the rotation member by blocking the rotation force between the rotation member and the rotation shaft, so that the pickup roller contacts the sheet on the tray by a weight of the pickup roller when the rotation shaft rotates in a sheet feeding direction, and by transmitting the rotation force between the rotation shaft and the rotation member to rotate the rotation member according to a rotation of the rotation shaft when the rotation shaft rotates in an opposite direction opposite to the sheet feeding direction; and a stopper installed in the rotation member to be elevated and lowered with respect to the tray according to a rotation of the rotation member to locate a front end of the sheet loaded on the tray to be disposed under the pickup roller and not to reach the feeding roller by blocking a path between the pickup roller and the feeding roller, the stopper including a gear portion.