Patent ID: 8233836

Claim:
An image forming apparatus, comprising: a rotational member for performing an operation in connection with image forming; a drive power source for generating a drive force for driving the rotational member; and a drive transmitting device for transmitting the drive force of the drive power source to the rotational member, wherein the drive transmitting device includes: a rotational shaft whose peripheral surface having a cut-off surface extending along an axial direction, the cut-off surface defining a region of the rotational shaft having a lack of an outer circumferential surface; a bearing member for supporting the rotational shaft, the bearing member having an inner circumferential surface portion in slide contact with the peripheral surface of the rotational shaft and facing the cut-off surface of the rotational shaft over the entire length of the bearing member in the axial direction of the rotational shaft; and a spacer mounted in a clearance formed between the inner circumferential surface portion of the bearing member and the cut-off surface of the rotational shaft, the spacer having a surface filling the lack of an outer circumferential surface of the rotational shaft so that the spacer defines part of a substantially continuous outer circumferential surface facing the inner circumferential surface portion of the bearing member over substantially the entire length of the bearing member.