| 摘要 |
A color image forming apparatus and an image forming unit thereof, the color image forming apparatus including: photosensitive bodies; a transfer drum to rotate while contacting the photosensitive bodies; a transfer device to transfer visible images overlapped on the transfer drum from the photosensitive bodies onto a printing medium; a photosensitive body driving gear to rotate with the transfer drum, and having a radius smaller than the transfer drum and having a same rotational center as the transfer drum; and photosensitive body gears coupled to the respective photosensitive bodies to be engaged with the photosensitive body driving gear, each of the photosensitive body gears having a radius larger than that of the photosensitive bodies. Accordingly, a size of each of the photosensitive body gears can be larger than that of each of the photosensitive bodies, and thus the photosensitive bodies can rotate stably.
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