Image forming apparatus

An image forming apparatus including an optical scanning device that irradiates a plurality of image bearing members with laser light to form electrostatic latent images thereon, the image forming apparatus comprising:

• a housing having a plurality of laser light exit openings arranged side by side, the laser light exit openings each corresponding to one of the image bearing members and extending in a main scanning direction of the laser light;
• a plurality of light transmitting members capable of transmitting the laser light, each covering one of the laser light exit openings and extending in the main scanning direction of the laser light;
• a plurality of cleaning members each located at a position corresponding to one of the light transmitting members and configured to clean the corresponding one of the light transmitting members by sliding thereon;
• a linear member looped in a circle about the housing;
• a drive motor configured to circulate the linear member in a first direction and a second direction different from the first direction;
• first and second cleaning holders each holding at least two of the cleaning members and configured to move in respective directions of extension of the light transmitting members when the linear member is circulated by the drive motor;
• a first stopper provided at an end of a movement track of the first cleaning holder and configured to restrict movement of the first cleaning holder in one of the directions of extension of the light transmitting members when the first cleaning holder comes into contact with the first stopper;
• a second stopper provided at an end of a movement track of the second cleaning holder and configured to restrict movement of the second cleaning holder in one of the directions of extension of the light transmitting members when the second cleaning holder comes into contact with the second stopper;
• and
• a contact determining section configured to determine, based on a current value of the drive motor, that the first cleaning holder has come into contact with the first stopper and that the second cleaning holder has come into contact with the second stopper.