Patent ID: 7413188

Claim:
A paper feed cassette, comprising: a cassette body capable of loading a plurality of recording mediums thereon and detachable from a body case; a side fence provided slidably to said cassette body which abuts on an end face in a width direction orthogonal to a feeding direction of a recording medium loaded on the cassette body; an end fence provided slidably to said cassette body which abuts on a rear end face in the feeding direction of the recording medium loaded on the cassette body; a size detection switch provided with the body case, configured to detect a size of the recording medium loaded in the cassette body; a first movable member having formed thereon a plurality of first convex portions at a peripheral edge thereof, which selectively makes said first convex portions face a plurality of portions to be pressed of the size detection switch, and is mounted on said cassette body and is movable in a direction of said portions to be pressed in synchronization with a sliding motion of said side fence; and a second movable member having formed thereon a plurality of second convex portions at a peripheral edge thereof, which selectively makes said second convex portions face a plurality of said portions to be pressed, and is mounted on said cassette body movably in the direction of varying said portions to be pressed facing said second convex portion in conjunction with the sliding motion of said end fence; wherein said first movable member and said second movable member are disposed at a position where said first convex portion and said second convex portion are overlapping and an outermost edge of each of the first and second convex portions extends a same distance from a common axis of rotation of the first and second movable members, a plurality of synthesized convex portions are formed by the overlapping of said first convex portion and said second convex portion and selectively press said portions to be pressed, and a width size and position of the synthesized convex portions vary in conjunction with the sliding motion of said side fence and said end fence according to the size of the recording medium loaded on said cassette body.