| 摘要 |
An image formation device includes an image-bearing body that rotates, a charging roller that contacts the image-bearing body and is rotated by the rotation of the image-bearing body, and charges the image-bearing body, a cleaning roller that contacts the charging roller and is rotated by the rotation of the charging roller, and cleans the charging roller, and a first auxiliary roller that is provided coaxially with the charging roller, contacts the image-bearing body and is rotated by the rotation of the image-bearing body. The image formation device satisfies the following relation: <?in-line-formulae description="In-line Formulae" end="lead"?>F1>F2>F3<?in-line-formulae description="In-line Formulae" end="tail"?> where F 1 represents a friction force between the first auxiliary roller and the image-bearing body, F 2 represents a friction force between the image-bearing body and the charging roller and F 3 represents a friction force between the charging roller and the cleaning roller.
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