Power transmitting device and image forming apparatus having the same

摘要

A power transmitting device having a structure to allow a photoconductor to stably form a visible image on a printing medium. The power transmitting device interconnects a rotator and a drive motor, the drive motor generating drive power to drive the rotator. The power transmitting device includes at least one gear to be rotated upon receiving power from the drive motor, a rotating shaft having one end penetrating the gear and a coupler to interconnect the other end of the rotating shaft and the rotator. An outer diameter of the coupler, an outer diameter of the rotator and an outer diameter of the gear satisfy the following relation: 0.7D1

主权项

1. An image forming apparatus comprising:
a photoconductor, an electrostatic latent image being formed on the photoconductor; a drive unit to drive the photoconductor; and a power transmitting unit to transmit power from the drive unit to the photoconductor, wherein the power transmitting unit includes
at least one gear connected to and rotated by the drive unit;a rotating shaft having one end connected to the gear so as to be rotated by the gear; anda coupler to interconnect the other end of the rotating shaft and the photoconductor,wherein the coupler has an outer diameter greater than about 21.5 mm and less than about 120 mm, andthe outer diameter of the coupler is substantially equal to or greater than an outer diameter of the photoconductor.