Image forming apparatus and cartridge

1. An image forming apparatus comprising:

a plurality of cartridges each including at least one of an image bearing member and a process member acting on the image bearing member; and

a moving member to which the plurality of cartridges is detachably attached and which is movable between an inside and an outside of the image forming apparatus,

wherein, of a pair of cartridges attached to the moving member and adjacent to each other, one cartridge has a recessed portion recessed from a frame member thereof and extending in an attachment direction of the cartridge, and the other cartridge has a raised portion protruding from the frame member thereof and extending in the attachment direction,

wherein the raised portion provided on the other cartridge enters the recessed portion provided in the one cartridge when the pair of cartridges is attached to the moving member, and

wherein positions of the raised portion and the recessed portion overlap each other as viewed in an axial direction of the image bearing member.

2. The image forming apparatus according to claim 1 , wherein the image forming apparatus includes a color image forming apparatus equipped with a plurality of the image bearing members, and

wherein the pair of cartridges includes cartridges for forming images of respective different colors.

3. The image forming apparatus according to claim 1 , wherein the pair of cartridges is attached to the moving member by being moved in a direction crossing the axial direction of the image bearing member.

4. The image forming apparatus according to claim 1 , wherein, of the pair of cartridges, the one cartridge has a plurality of the recessed portions, and the other cartridge has a plurality of the raised portions, and wherein, when the raised portions and the recessed portions are viewed in the axial direction of the image bearing members, the corresponding raised portions and recessed portions overlap each other in position.

5. The image forming apparatus according to claim 1 , wherein each of the pair of cartridges is a process cartridge including the image bearing member and a developer bearing member serving as the process member.

6. The image forming apparatus according to claim 5 , wherein the process cartridge includes, as the frame member, a first frame member supporting the image bearing member, and a second frame member supporting the developer bearing member, and

wherein the recessed portion is formed in the first frame member of the one cartridge, and the raised portion is formed on the second frame member of the other cartridge, or the recessed portion is formed in the second frame member of the one cartridge has, and the raised portion is formed on the first frame member of the other cartridge.

7. The image forming apparatus according to claim 1 , wherein the pair of cartridges includes a cartridge including the image bearing member and a cartridge including a developer bearing member serving as the process member.

8. The image forming apparatus according to claim 1 , wherein, of the pair of cartridges, the one cartridge further has a raised portion protruding from the frame member thereof and extending in the attachment direction thereof, wherein the other cartridge further has a recessed portion recessed from the frame member thereof and extending in the attachment direction thereof,

wherein the raised portion provided on the one cartridge enters the recessed portion provided in the other cartridge when the pair of cartridges is attached to the moving member, and

wherein, when each raised portion and each recessed portion provided on the pair of cartridges are viewed in the axial direction of the image bearing member, positions of the corresponding raised portion and recessed portion overlap each other.

9. An image forming apparatus comprising:

a plurality of cartridges each including at least one of an image bearing member and a process member acting on the image bearing member; and

a moving member to which the plurality of cartridges is detachably attached and which is movable between an inside and an outside of the image forming apparatus,

wherein, of the plurality of cartridges attached to the moving member, a central cartridge situated between other adjacent cartridges has a recessed portion recessed from a frame member thereof and extending in an attachment direction of the cartridge, and a raised portion protruding from the frame member thereof and extending in the attachment direction,

wherein a raised portion provided on one of the adjacent cartridges enters the recessed portion provided in the central cartridge, and the raised portion provided on the central cartridge enters a recessed portion provided in the other adjacent cartridge when the plurality of cartridges is attached to the moving member, and

wherein positions of the corresponding raised portions and recessed portions overlap each other when the raised portions and recessed portions provided on and in the plurality of cartridges are viewed in an axial direction of the image bearing member.

10. The image forming apparatus according to claim 9 , wherein the image forming apparatus includes a color image forming apparatus equipped with a plurality of the image bearing members, and

wherein the plurality of cartridges includes cartridges for forming images of respective different colors.

11. The image forming apparatus according to claim 9 , wherein the plurality of cartridges is attached to the moving member by being moved in a direction crossing the axial direction of the image bearing member.

12. The image forming apparatus according to claim 9 , wherein, of the plurality of cartridges, the central cartridge has a plurality of the recessed portions and a plurality of the raised portions, the one of the adjacent cartridges has a plurality of the raised portions, and the other adjacent cartridge has a plurality of the recessed portions, and

wherein, when the raised portions and the recessed portions are viewed in the axial direction of the image bearing members, the corresponding raised portions and recessed portions overlap each other in position.

13. The image forming apparatus according to claim 9 , wherein each of the plurality of cartridges is a process cartridge including the image bearing member and a developer bearing member serving as the process member.

14. The image forming apparatus according to claim 13 , wherein the process cartridge includes, as the frame member, a first frame member supporting the image bearing member, and a second frame member supporting the developer bearing member, and

wherein the central cartridge has the recessed portion in one of the first frame member and the second frame member, and has the raised portion on the other of the first frame member and the second frame member.

15. A cartridge that is detachably attachable to an apparatus main body of an image forming apparatus, the cartridge comprising:

at least one of an image bearing member and a process member acting on the image bearing member;

a frame member supporting the image bearing member or the process member;

a recessed portion recessed from the frame member and extending in an attachment direction of the cartridge; and

a raised portion protruding from the frame member and extending in the attachment direction,

wherein the cartridge is attached to a moving member movable between an outside and an inside of the image forming apparatus together with other cartridges, the cartridge constituting a central cartridge arranged between other cartridges adjacent thereto,

wherein, when each cartridge is attached to the moving member, a raised portion provided on one of the adjacent cartridges enters the recessed portion provided in the central cartridge, and the raised portion provided on the central cartridge enters a recessed portion provided in the other of the adjacent cartridges, and

wherein, when the raised portions and recessed portions provided on and in the cartridges are viewed in an axial direction of the image bearing member, positions of the corresponding raised portions and recessed portions overlap each other.

16. The cartridge according to claim 15 , wherein the cartridge is a process cartridge including:

an image bearing member; and

a developer bearing member serving as the process member.