Image forming apparatus and cartridge used therein

1. An image forming apparatus comprising:

a main assembly; and

a cartridge capable of supplying developer and detachably mountable to said main assembly,

wherein said main assembly includes a mounting portion for mounting said cartridge and a door for causing said mounting portion to be in an open state and a closed state,

wherein said main assembly or said cartridge includes an expansion and contraction member for displacing at least a part of said cartridge,

wherein opening and closing of said door is interrelated with expansion and contraction of said expansion and contraction member,

wherein in the closed state, said cartridge mounted in said mounting portion is in a first position, inside said main assembly, where an image is formable,

wherein in the open state, said cartridge mounted in said mounting portion is in a second position where at least a part thereof projects to an outside of said main assembly, and

wherein said cartridge includes a grip portion for being gripped when said cartridge is mounted into and demounted from said main assembly,

wherein said expansion and contraction member displaces said grip portion in a state in which said mounting portion is not displaced, and

wherein said grip portion is accommodated inside said main assembly at the first position and is projected outside of said main assembly at the second position.

2. An image forming apparatus according to claim 1 , wherein said door includes, at an inner surface facing the inside of said main assembly in the closed state, an urging portion for relaxing an impact when said urging portion contacts at least a part of said cartridge projecting outside of said main assembly.

3. An image forming apparatus according to claim 1 , wherein a direction of at least a part of said cartridge projecting to the outside of said main assembly is a same direction as a demounting direction of said cartridge.

4. An image forming apparatus according to claim 3 , wherein the same direction is a vertical direction.

5. An image forming apparatus according to claim 1 , wherein a direction of at least a part of said cartridge projecting to the outside of said main assembly is a horizontal direction.

6. An image forming apparatus according to claim 1 , wherein said cartridge includes a plurality of cartridges provided correspondingly to different colors.

7. An image forming apparatus according to claim 6 , wherein mounting positions of said plurality of cartridges are different from each other with respect to a common mounting direction of said plurality of cartridges.

8. An image forming apparatus according to claim 1 , further comprising a moving member, provided in said main assembly, for moving the developer from said cartridge to said main assembly,

wherein said moving member has a bellow shape and is expanded and contracted by said expansion and contraction member.

9. An image forming apparatus according to claim 1 , wherein said door includes, at an inner surface facing the inside of said main assembly in the closed state, an urging portion for relaxing an impact when said urging portion contacts at least a part of said cartridge projecting outside of said main assembly.

10. An image forming apparatus, comprising:

a main assembly; and

a cartridge capable of supplying developer and detachably mountable to said main assembly,

wherein said main assembly includes a mounting portion for mounting said cartridge and a door for causing said mounting portion to be in an open state and a closed state,

wherein said main assembly or said cartridge includes an expansion and contraction member for displacing at least a part of said cartridge,

wherein opening and closing of said door is interrelated with expansion and contraction of said expansion and contraction member,

wherein in the closed state, said cartridge mounted in said mounting portion is in a first position, inside said main assembly, where an image is formable,

wherein in the open state, said cartridge mounted in said mounting portion is in a second position where at least a part thereof projects outside of said main assembly,

wherein said expansion and contraction member displaces said cartridge mounted in said mounting portion integrally with said mounting portion, and

wherein at the second position, said cartridge and said mounting portion are projected outside of said main assembly.

11. An image forming apparatus according to claim 10 , further comprising a moving member, provided in said main assembly, for moving the developer from said cartridge to said main assembly,

wherein said moving member has a bellow shape and is expanded and contracted by said expansion and contraction member.

12. An image forming apparatus according to claim 10 , wherein said cartridge includes a plurality of cartridges provided correspondingly to different colors.

13. An image forming apparatus according to claim 12 , wherein mounting positions of said plurality of cartridges are different from each other with respect to a common mounting direction of said plurality of cartridges.

14. An image forming apparatus according to claim 12 , further comprising grip portions for being gripped when said plurality of cartridges are mounted into associated mounting portions,

wherein a difference in projected position between said grip portions is smaller than a difference in position between the mounting portions with respect to a mounting direction.

15. An image forming apparatus according to claim 14 , wherein end portion positions of said grip portions are aligned with a predetermined surface so as to eliminate the difference in projected position between said grip portions.

16. An image forming apparatus according to claim 10 , wherein a direction of at least a part of said cartridge projecting to the outside of said main assembly is a same direction as a demounting direction of said cartridge.

17. An image forming apparatus according to claim 16 , wherein the same direction is a vertical direction.

18. A cartridge capable of supplying developer and detachably mountable to a main assembly of an image forming apparatus including a mounting portion and a door for causing the mounting portion to be in an open state and a closed state, said cartridge comprising:

a grip portion; and

an expansion and contraction member for displacing said grip portion while maintaining said cartridge at a position where said cartridge is mounted in the mounting portion,

wherein said grip portion is in a first position where an image is formable inside the main assembly in the closed state and is in a second position where said grip portion projects to an outside of the main assembly in the open state.

19. A cartridge according to claim 18 , which is a toner cartridge.

20. A cartridge according to claim 18 , which is a developing cartridge including a developing roller.