Patent ID: 7219791

Claim:
A conveying mechanism comprising: a first rotator that is rotatably supported by a bearing bracket and conveys an object to be conveyed in a rotation direction by rotating around a first rotation axis; an energizing member that sandwiches the object to be conveyed in cooperation with the first rotator and energizes the first rotator so that the first rotator comes into contact with the bearing bracket; a magnetic recording medium which is constructed so as to rotate coaxially and integrally with the first rotator and have a magnetic recording surface orthogonal to the first rotation axis; and a magnetic sensor that is fixed to the bearing bracket so as to come into contact with the magnetic recording surface along a locus of the contact point between the object to be conveyed and the first rotator, drawn on the basis of a play between the first rotator and the bearing bracket in the state where the energizing member energizes the first rotator, and that detects a rotation amount of the magnetic recording medium by using magnetic informations recorded on the magnetic recording surface.