Component movement mechanism for an image forming apparatus

An image forming apparatus comprising:

• a main body case;
• a photosensitive drum;
• an intermediate transfer belt disposed above the photosensitive drum;
• and
• a developing device comprising:
• a developing roller rotatable about an axis extending in a first direction, the developing roller being disposed below the photosensitive drum;
• and
• a developer accommodating chamber configured to accommodate developer therein, the developer accommodating chamber being disposed below the photosensitive drum,
• wherein the main body case includes a developing device holder, the developing device holder configured to detachably support the developing device, the developing device holder configured to move between a first position in which the developing device is in a close position and a second position in which the developing device is in a distant position,
• wherein the developing roller is farther away from the photosensitive drum when the developing device is in the distant position than when the developing device is in the close position,
• wherein the image forming apparatus further comprises a developing device move mechanism configured to move the developing device holder upwardly to the first position from the second position, and
• wherein the developing device move mechanism includes an engaging member engaging the developing device holder in the first position and a spring urging the engaging member upwardly.

An image forming apparatus comprising:

• a main body case;
• a first photosensitive drum;
• a second photosensitive drum;
• an intermediate transfer belt disposed above the first and second photosensitive drums;
• a first developing device;
• a second developing device;
• the first developing device comprising:
• a first developing roller rotatable about an axis extending in a first direction, the first developing roller being disposed below the first photosensitive drum;
• and
• a first developer accommodating chamber configured to accommodate developer therein, the first developer accommodating chamber being disposed below the first photosensitive drum,
• the second developing device comprising:
• a second developing roller rotatable about an axis extending in the first direction, the second developing roller being disposed below the second photosensitive drum;
• and
• a second developer accommodating chamber configured to accommodate the developer therein, the second developer accommodating chamber being disposed below the second photosensitive drum,
• wherein the main body case includes a first developing device holder and a second developing device holder, the first developing device holder configured to detachably support the first developing device, the second developing device holder configured to detachably support the second developing device,
• wherein the first developing device holder is configured to move between a first position in which the first developing device is in a close position and a second position in which the first developing device is in a distant position,
• wherein the second developing device holder is configured to move between a third position in which the second developing device is in the close position and a fourth position in which second developing device is in the distant position,
• wherein the first developing roller is farther away from the first photosensitive drum when the first developing device is in the distant position than when the first developing device is in the close position,
• wherein the second developing roller is farther away from the second photosensitive drum when the second developing device is in the distant position than when the second developing device is in the close position, and
• wherein the first developing device holder and the second developing device holder are configured to swing independently of each other.