Drive transmission unit and image forming apparatus incorporating same
AssigneeRicoh Company, Ltd.
InventorsMasahiro Ishida, Naoki Matsuda
Life of this patent
Estimating the term…
Abstract
A drive transmission unit is described that includes a drive source, and a rotatable drive transmitting member to transmit a driving force from the drive source. The drive transmitting member includes a bottom part intersecting an axis of the drive transmitting member, a circular transmitting part extending from the bottom part in an axial direction of the drive transmitting member and including an internal toothed surface on an inner circumferential surface of the transmitting part to mesh with a first member, and a first projecting part and a second projecting part projecting in opposite directions from the bottom part along the axial direction of the drive transmitting member and having different diameters.
Claims11
A drive transmission unit comprising:
- a drive source;
- and
- a rotatable drive transmitting member to transmit a driving force from the drive source, the rotatable drive transmitting member comprising:
- a circular recessed part including a tooth portion of an inner circumferential surface of the circular recessed part;
- a first circular projecting part dividing the circular recessed part into a plurality of recessed portions in a radial direction of the drive transmitting member, the first circular projecting part projecting in a first direction perpendicular to a direction of rotation of the drive transmitting member;
- and
- a second circular projecting part projecting in a second direction opposite the first direction,
- wherein an outer diameter of the second circular projecting part is relatively smaller than an inner diameter of the drive transmitting member and an inner diameter of the second circular projecting part is relatively larger than an outer diameter of the first circular projecting part, and
- wherein a difference between the inner diameter of the second circular projecting part and the outer diameter of the first circular projecting part is substantially equal to a difference between the inner diameter of the drive transmitting member and the outer diameter of the second circular projecting part.
Dependencies are inferred from the claim text.