Patent ID: 8061708
Filing Date: 2011-11-22
Classification: B65H,Y10T

Abstract:
1. A sheet feeding device comprising: a sheet support for placing a recording sheet of a standard size thereon; a restricting section configured to slide along a line passing through at least three restricting points on the sheet support to restrict a position of the recording sheet by abutting against an edge of the recording sheet when the restricting section is positioned at each of the restricting points; a displacement section provided with the sheet support, a position of the displacement section being detectable by a sensor; and a link section interlinking the restricting section and the displacement section, the link section being configured to move the displacement section in accordance with a position of the restricting section, wherein: the link section comprises: a rotating shaft disposed perpendicular to a reverse surface of the sheet support and on a side of a line along which the restricting section slides; a slit bent in a plane parallel to the reverse surface; and a pinion gear formed with a toothed peripheral surface extending about the rotating shaft; the restricting section comprising a pin sliding in the slit; the displacement section comprising a rack gear formed with a toothed surface meshing with the toothed peripheral surface of the pinion gear; the rotating shaft is disposed in a position where a distance from the rotating shaft to the pin is always longer than a distance from the rotating shaft to the rack gear; the link section is configured to change a ratio of a distance that the displacement section travels to a distance that the restricting section travels in accordance with a position of the restricting section, the ratio including a first ratio and a second ratio; the first ratio is a ratio of the distance that the displacement section travels to the distance that the restricting section travels when the restricting section is positioned between restricting points which define a relatively small spacing therebetween; the second ratio is a ratio of the distance that the displacement section travels to the distance that the restricting section travels when the restricting section is positioned between restricting points which define a relatively large spacing therebetween; and the first ratio exceeds the second ratio.