Patent ID: 7044666

Claim:
A sheet feeding device comprising: a cassette in which recording media are configured to be stacked, the cassette comprising a rear end regulation member configured to be moved in a direction in which the recording media are fed to regulate rear ends of the recording media and a size detection device configured to swing with movement of the rear end regulation member; and a size determination device arranged within an area corresponding to a width of the cassette in the direction in which the recording media are fed and configured to determine a size of the recording media stacked in the cassette by detecting a position of the size detection device; wherein a swing fulcrum of the size detection device is located at one end of the cassette in the direction in which the recording media are fed, and the size detection device is configured to extend such that a swinging side end thereof is located at the other end of the cassette in the direction in which the recording media are fed, and wherein the size determination device is arranged at a side of the other end of the cassette in the direction in which the recording media are fed.