Recording sheet feeder and image forming apparatus providing easy maintenance with simple structure

An image forming apparatus comprising a recording sheet feeder,

• the recording sheet feeder comprising:
• a recording sheet tray to load a plurality of recording sheets;
• a pressing member to press up the recording sheet tray;
• a feed roller to feed the plurality of recording sheets loaded, on the recording sheet tray;
• a feed roller driving shaft fixedly mounted axially with the feed roller on one end of the feed roller driving shaft;
• a recording sheet tray moving mechanism to move the recording sheet tray between an upper position, at which an uppermost recording sheet of the plurality of recording sheets loaded on the recording sheet tray contacts the feed roller, and a lower position, at which the uppermost recording sheet separates from the feed roller,
• the recording sheet tray moving mechanism comprising:
• a first eccentric cam rotatably mounted axially on another end of the feed roller driving shaft to rotate to press down the recording sheet tray;
• and
• a second eccentric cam provided coaxial with the feed roller driving shaft to rotate to press down the recording sheet tray;
• a driver to generate a driving force to drive one of the feed roller and the recording sheet tray moving mechanism;
• a driving force transmission member to transmit the driving force generated by the driver from the first eccentric cam to the second eccentric cam;
• a controller to rotate the driver in one of a first direction and a second direction different from the first direction;
• and
• a driving force switch member to drive the recording sheet tray moving mechanism when the driver rotates in the first direction, and to rotate the feed roller driving shaft when the driver rotates in the second direction.