Image forming apparatus
AssigneeBrother Kogyo Kabushiki Kaisha
InventorAtsuo Hirose
Life of this patent
Estimating the term…
Abstract
An image forming apparatus includes an image forming unit, a roller, a driving shaft, a support shaft, a bearing portion, a contact member and a pivot shaft. The driving shaft is removably connected to one end of the roller and the support shaft is disposed at the other end of the roller in an axial direction. The pivot shaft is configured to pivotably support the contact member, and includes a rotating shaft disposed coaxially with an axis line of the roller and an eccentric portion extending toward the roller at a position on the other end side of the roller and eccentric from an axis line of the rotating shaft. The contact member is disposed in the eccentric portion. Distance from the axis line of the rotating shaft to the eccentric portion in a radial direction is larger than dimension of the support shaft in a radial direction.
Claims8
An image forming apparatus, comprising:
- an image forming unit configured to form an image on a sheet;
- a roller configured to rotate in contact with the sheet;
- a driving shaft disposed coaxially with an axis of the roller and configured to transmit a rotating force to the roller and to be removably connected to a first end of the roller in an axial direction;
- a support shaft disposed at a second end of the roller in the axial direction, configured to support the roller, and extending in the axial direction;
- a bearing portion configured to support the support shaft such that the support shaft is movable in the axial direction;
- a contact member disposed at a side of the roller in the axial direction which includes the second end and configured to pivot between a contact position in which the contact member is in contact with the sheet conveyed by the roller and a non-contact position in which the contact member is not in contact with the sheet;
- and
- a pivot shaft configured to pivotably support the contact member and comprising:
- a rotating shaft disposed coaxially with the axis of the roller;
- and
- an eccentric portion extending toward the side of the roller in the axial direction which includes the second end, wherein the eccentric portion is eccentric with respect to an axis of the rotating shaft,
- wherein:
- the contact member is disposed in the eccentric portion;
- and
- a distance from the axis of the rotating shaft to the eccentric portion in a radial direction is larger than a dimension of the support shaft extending from the axis of the roller to an outer surface of the support shaft in the radial direction.
Dependencies are inferred from the claim text.