Cartridge, image forming apparatus and main assembly of image forming apparatus

1. A cartridge detachably mountable to a main assembly of an image forming apparatus, including a receiving recessed portion, a contact portion and a main assembly electrical contact, for forming an image on a recording material, wherein said cartridge contributes to an image forming process for forming the image on the recording material, said cartridge comprising:

a first positioning projection to be held in the receiving recessed portion;

a second positioning projection, provided at a position different from a position of said first positioning projection, to be contacted to the contact portion; and

an information storing member including a storing element for storing information and a storing element contact electrically connected with said storing element, wherein said storing element contact contacts the main assembly electrical contact,

wherein a moment applied to said cartridge by a force applied from the main assembly electrical contact to said storing element contact acts in a direction of urging said second positioning projection to the contact portion.

2. A cartridge according to claim 1 , wherein said storing element is provided downstream of said first positioning projection with respect to a mounting direction of said cartridge into the main assembly, and said second positioning projection is provided upstream of said first positioning projection with respect to the mounting direction.

3. A cartridge according to claim 1 , wherein said storing element is provided upstream of said first positioning projection with respect to a mounting direction of said cartridge into the main assembly, and said second positioning projection is provided downstream of said first positioning projection with respect to the mounting direction.

4. A cartridge according to claim 1 , which is a process cartridge of an integral type including a rotatable image bearing member for forming a latent image and image forming process means actable on said image bearing member.

5. A cartridge according to claim 4 , wherein said image forming process means is at least a developing device unit including a developer carrying member for developing the latent image by supplying a developer to said image bearing member and a developer accommodating portion for accommodating the developer.

6. A cartridge according to claim 4 , wherein said first positioning projection is provided substantially coaxially with a rotational axis of said image bearing member.

7. A cartridge according to claim 1 , which is a process cartridge of a separation type in which a rotatable image bearing member for forming a latent image and image forming process means other than developing means for developing the latent image, formed on said image bearing member, with the developer.

8. A cartridge according to claim 1 , which is a developing cartridge including a developer carrying member for developing a latent image by supplying a developer to a rotatable image bearing member on which the latent image is formed, and including a developer accommodating portion for accommodating the developer.

9. A cartridge according to claim 1 , which is a developer cartridge in which a developer is accommodated.

10. An image forming apparatus for forming an image on a recording material, said image forming apparatus comprising:

a receiving recessed portion;

a contact portion;

a main assembly electrical contact; and

a cartridge according to claim 1 .

11. A cartridge according to claim 1 , wherein said force applied from the main assembly electrical contact to said storing element contact is from a bottom of said cartridge to a top of said cartridge.

12. A cartridge according to claim 1 , wherein said storing element contact is located below the main assembly electrical contact.

13. A cartridge according to claim 1 , wherein said storing element contact is located at a lower side of said cartridge.

14. A main assembly of an image forming apparatus, for forming an image on a recording material, to which a cartridge including a first positioning projection, a second positioning projection provided at a position different from a position of the first positioning projection, and an information storing member which includes a storing element for storing information and a storing element contact electrically connected with the storing element is detachably mountable, said main assembly comprising:

in a state in which the cartridge is mounted at an image forming position of the image forming apparatus,

a receiving recessed portion holding the first positioning projection;

a contact portion to which the second positioning projection is contacted; and

a main assembly electrical contact contacting the storing element contact,

wherein a moment applied to the cartridge by a force applied from the main assembly electrical contact to the storing element contact acts in a direction of urging the second positioning projection to the contact portion.

15. A main assembly according to claim 14 , wherein said force applied from said main assembly electrical contact to said storing element contact is from a bottom of said cartridge to a top of said cartridge.

16. A main assembly according to claim 14 , wherein said main assembly electrical contact is located above the storing element contact.