SHEET SIZE DETECTOR AND IMAGE PROCESSING APPARATUS

摘要

A sheet size detector to detect a sheet size of a recording medium includes a movable member to move in a sheet size detection direction to a position corresponding to the sheet size, a magnetic flux detector including a coil disposed on a board face parallel to the sheet size detection direction to generate a magnetic flux in a direction perpendicular to the board face, and a target to oppose the board face and including a material to affect the magnetic flux. The target is different in configuration in the sheet size detection direction to change the magnetic flux in the direction perpendicular to the board face as the movable member moves. The magnetic flux detector outputs a signal corresponding to changes in magnetic flux in the direction perpendicular to the board face, and the signal corresponds to the position of the movable member.

主权项

1. A sheet size detector to detect a sheet size of a recording medium, the sheet side detector comprising:
a movable member to move in a sheet size detection direction to a position corresponding to the sheet size; a magnetic flux detector including a coil disposed on a board face parallel to the sheet size detection direction, the coil to generate a magnetic flux in a direction perpendicular to the board face, the magnetic flux detector to output a signal corresponding to changes in magnetic flux in the direction perpendicular to the board face, the signal corresponding to the position of the movable member; and a target to oppose the board face and including a material to affect the magnetic flux, the target different in configuration in the sheet size detection direction to change the magnetic flux in the direction perpendicular to the board face according to movement of the movable member.