Abstract: A driving device to be used in an image forming apparatus includes an input gear; a partly non-toothed gear having a toothed portion engageable with the input gear and having a non-toothed portion; a holding member capable of placing the partly non-toothed gear in a holding state in which the non-toothed portion opposes the input gear and the partly non-toothed gear is not engaged with the input gear and capable of placing the partly non-toothed gear in a released state in which the holding state is released; a cylindrical member rotatable by receiving a rotational force; and an entering portion which is rotatable together with the partly non-toothed gear and which is capable of entering an inside of the cylindrical member and capable of receiving the rotational force from the cylindrical member by a frictional force between the entering portion and the cylindrical member.

Abstract: A driving device to be used in an image forming apparatus includes an input gear; a partly non-toothed gear having a toothed portion engageable with the input gear and having a non-toothed portion; a holding member capable of placing the partly non-toothed gear in a holding state in which the non-toothed portion opposes the input gear and the partly non-toothed gear is not engaged with the input gear and capable of placing the partly non-toothed gear in a released state in which the holding state is released; a cylindrical member rotatable by receiving a rotational force; and an entering portion which is rotatable together with the partly non-toothed gear and which is capable of entering an inside of the cylindrical member and capable of receiving the rotational force from the cylindrical member by a frictional force between the entering portion and the cylindrical member.

Abstract: A photosensor includes a light emitting device, a light receiving device for receiving a side beam from said light emitting device, and a light diffusing member disposed between a side surface of said light emitting device and said light receiving device.

Abstract: A cleaning apparatus, which can be applied to an electrophotographic image forming apparatus, is adapted to remove toner adhered from a member to be cleaned. The apparatus includes a cleaning element for removing the adhered toner, a displaceable support for supporting the cleaning element, including a casing for containing the cleaning element therein, so that the cleaning element can be shifted between an operative position where the cleaning element contacts with the member to be cleaned and a retract position where the cleaning element is retracted from the operative position, and an elastic element for elastically biasing the cleaning element supported by the support toward the member to be cleaned. A toner scattering feature directs removed toner entrained by an airflow generated by movement of the cleaning element.

Abstract: A cleaning apparatus for use with an electrophotographic image forming apparatus, includes a rotatable brush for removing toner adhered to a member to be cleaned, a filter housing provided remote from the brush with respect to said member to be cleaned, discharge openings formed in a plurality of surfaces defining the filter housing, and a filter disposed within the filter housing in a confronting relation to the discharge openings.

Abstract: An apparatus for rotating a magnetic disk supported by a disk hub on its central portion includes a spindle shaft rotated by a driving motor and inserted through a central hole of the disk, a rotating member fixed coaxially to the spindle shaft for corotation therewith, a drive pin arranged off-center on the rotating member and capable of being inserted through an off-center drive hole formed in the magnetic disk, a leaf spring member attached to the underside of the rotating member and including a first leaf spring portion having the drive pin implanted in one end thereof and a second leaf spring portion bent at a right angle from the other end of the first leaf spring portion, a rotational support shaft for rotatably supporting the leaf spring member, at the other end of the first leaf spring portion, on the rotating member about an axis perpendicular to the underside thereof, and a spring contact member fixed off-center to the underside of the rotating member.