Drive transmission apparatus and image forming apparatus
AssigneeCanon Kabushiki Kaisha
InventorsHiroaki Takezawa, Atsushi Yoshida
Life of this patent
Estimating the term…
Abstract
The present disclosure provides a drive transmission apparatus capable of reducing vibration of rotating member. The apparatus includes a shaft, a pin, and a rotating member. The rotating member is engaged with the shaft by the pin and rotates with the shaft. A protruded portion is provided on one of an outer circumferential surface of the shaft and an inner circumferential surface of the rotating member. The rotating member is attached to the shaft with the protruded portion in pressure contact with another one of the outer circumferential surface of the shaft and the inner circumferential surface of the rotating member, so that swinging of the rotating member around the pin is restricted.
Claims20
A drive transmission apparatus comprising:
- a rotatable shaft;
- a pin provided on the shaft and projecting radially out of an outer circumferential surface of the shaft;
- a rotating member configured to rotate with the shaft, the rotating member comprising an inner circumferential surface facing the outer circumferential surface of the shaft and an engage portion configured to engage with the pin;
- and
- a protruded portion provided on one of the outer circumferential surface of the shaft and the inner circumferential surface of the rotating member and disposed in pressure contact with the other one of the outer circumferential surface of the shaft and the inner circumferential surface of the rotating member.
A drive transmission apparatus comprising:
- a metal rotatable shaft;
- a metal pin inserted through a hole formed in the shaft and projecting radially out from an outer circumferential surface of the shaft;
- and
- a cogwheel composed of synthetic resin and configured to rotate with the shaft, the cogwheel comprising:
- an inner circumferential surface facing the outer circumferential surface of the shaft;
- an engage groove defined on one side surface of the cogwheel in an axial direction of the shaft and configured to engage with the metal pin;
- and
- a plurality of teeth arrayed along a circumferential direction of the shaft,
- wherein the cogwheel further comprises a first protruded portion and a second protruded portion each protruding radially inward from the inner circumferential surface and disposed in pressure contact with the outer circumferential surface of the shaft, and
- wherein the first protruded portion and the second protruded portion are disposed respectively on one side and on another side with respect to a rotation axis of the shaft when viewed in a direction in which the metal pin projects.
An image forming apparatus comprising:
- an image forming unit configured to form an image on a sheet;
- a conveyance member configured to convey the sheet by rotating in contact with the sheet;
- and
- a drive transmission apparatus configured to transmit driving force to the conveyance member, the drive transmission apparatus comprising:
- a rotatable shaft;
- a pin provided on the shaft and projecting radially out of an outer circumferential surface of the shaft;
- a rotating member configured to rotate with the shaft, the rotating member comprising an inner circumferential surface facing the outer circumferential surface of the shaft and an engage portion configured to engage with the pin;
- and
- a protruded portion provided on one of the outer circumferential surface of the shaft and the inner circumferential surface of the rotating member and disposed in pressure contact with the other one of the outer circumferential surface of the shaft and the inner circumferential surface of the rotating member.
Dependencies are inferred from the claim text.