Cleaning device and image forming device

1. A cleaning device comprising:

a cleaning member that contacts a charging roller which charges an image carrier which carries an image, and cleans a surface of the charging roller; and

a holding structure that holds the cleaning member such that the cleaning member is movable at least between a first position and a second position along a peripheral direction of the charging roller, the holding structure including a first supporting member that supports the cleaning member at the first position and a second supporting member that supports the cleaning member at the second position, the holding structure holding the cleaning member such that an amount of compression of the cleaning member at a contacting portion of the charging roller and the cleaning member is greater at the second position than at the first position.

2. The cleaning device of claim 1 , wherein the cleaning member receives rotational force from the charging roller, and moves from the first position to the second position.

3. The cleaning device of claim 1 , wherein the cleaning member moves from the second position to the first position accompanying stoppage of or reverse rotation of the charging roller.

4. The cleaning device of claim 1 , wherein a distance between the first supporting member and the charging roller is set to be greater than that between the second supporting member and the charging roller.

5. The cleaning device of claim 1 , wherein the holding structure has an urging member urging the cleaning member in a direction heading from the second position toward the first position.

6. An image forming device comprising:

an image carrier that carries an image;

a charging roller that charges the image carrier; and

a cleaning device that cleans the charging roller, the cleaning device having:

a cleaning member that contacts the charging roller, and cleans a surface of the charging roller; and

a holding structure holding the cleaning member such that the cleaning member is movable at least between a first position and a second position along a peripheral direction of the charging roller, the holding structure including a first supporting member that supports the cleaning member at the first position and a second supporting member that supports the cleaning member at the second position, the holding structure holding the cleaning member such that an amount of compression of the cleaning member at a contacting portion of the charging roller and the cleaning member is greater at the second position than at the first position.

7. The image forming device of claim 6 , wherein the cleaning member receives rotational force from the charging roller, and moves from the first position to the second position.

8. The image forming device of claim 6 , wherein the cleaning member moves from the second position to the first position accompanying stoppage of or reverse rotation of the charging roller.

9. The image forming device of claim 6 , wherein

a distance between the first supporting member and the charging roller is set to be greater than that between the second supporting member and the charging roller.

10. The image forming device of claim 6 , wherein the holding structure has an urging member urging the cleaning member in a direction heading from the second position toward the first position.

11. A method of cleaning a charging roller, comprising:

providing a cleaning member, that cleans a surface of a charging roller which charges an image carrier which carries an image;

providing a holding structure including a first supporting member that supports the cleaning member at a first position and a second supporting member that supports the cleaning member at a second position;

rotating the charging roller; and

moving the cleaning member along a peripheral direction of the charging roller from the first position to the second position, the moving giving rise to a state in which an amount of compression of the cleaning member at a contacting portion of the charging roller and the cleaning member is greater at the second position than at the first position.

12. The method of cleaning of claim 11 , wherein the cleaning member receives rotational force from the charging roller, and moves from the first position to the second position.

13. The method of cleaning of claim 11 , wherein the cleaning member moves from the second position to the first position accompanying stoppage of or reverse rotation of the charging roller.

14. The method of cleaning of claim 11 , wherein a distance between the first supporting member and the charging roller is set to be greater than that between the second supporting member and the charging roller.

15. The method of cleaning of claim 11 , further comprising urging the cleaning member in a direction heading from the second position toward the first position.