Patent ID: 7591467

Claim:
A sheet detecting device for detecting a position of a recording medium, comprising: a follow roller disposed on a conveying path along which a recording medium is conveyed in a conveying direction, the follow roller receiving a rotational force of a drive roller and following rotation of the drive roller; an urging member that applies an urging force to the follow roller for urging the follow roller toward the drive roller; a first support member; a second support member that rotatably supports the follow roller and that supports the urging member, the second support member being supported on the first support member, allowing the second support member to move to a first position when the drive roller and the follow roller nippingly convey the recording medium, and allowing the second support member to move to a second position upstream of the first position in the conveying direction when the recording medium is separated from the drive roller and the follow roller, the second support member being provided with a detection member that moves with the second support member when the second support member moves between the first position and the second position; and a detecting unit that detects the detection member, thereby detecting the position of the recording medium; wherein the first support member supports the second support member via a rolling bearing, allowing the second support member to rollingly move between the first position and the second position.