Image forming apparatus

摘要

The image forming apparatus includes a cooling device for cooling a plurality of cartridges, and a plurality of shielding members for shielding the plurality of openings, respectively. Each developing member is movable between a first position at which the developing member is brought into contact with a photosensitive member and a second position at which the developing member is caused to separate from the photosensitive member. Each of the plurality of shielding members is caused to move in association with a position of the developing member of the cartridge opposed to the opening to be shielded by the each of the shielding members. A gap between the opening and the shielding member the second position of the developing member is smaller than a gap therebetween at the first position of the developing member is.

主权项

1. An image forming apparatus comprising:
a first cartridge including a first photosensitive drum on which a latent image is formed and a first developing member to supply toner to the latent image formed on the first photosensitive drum; a second cartridge including a second photosensitive drum on which a latent image is formed and a second developing member to supply toner to the latent image formed on the first photosensitive drum; a cooling device configured to supply air; a duct configured to introduce the air supplied from the cooling device to the first cartridge and the second cartridge, the duct including a first opening whose position corresponds to a position of the first cartridge and a second opening whose position corresponds to a position of the second cartridge; wherein the first cartridge includes a movable first shielding member that is configured to shield the first opening, and the second cartridge includes a movable second shielding member that is configured to shield the second opening, a first contacting/separating unit movable to separate the first developing member from the first photosensitive drum and to separate the second developing member from the second photosensitive drum, and wherein a shielding amount in which the first shielding member shields the first opening in an axis direction along an axis of the first photosensitive drum is less than a shielding amount in which the second shielding member shields the second opening in the axis direction.