Image forming device and cartridge configuration

1. An image forming device comprising:

a main body;

a cover connected to the body, the cover including pressing members in which at least one of the pressing members includes at least one main-body terminal connected to an electric circuit;

a photosensitive drum supported by the main body;

a developing cartridge including;

a developing frame defining a developer container configured to contain developer, the developing frame having a first side and a second side;

a developing roller located at the first side of the developing frame so as to receive developer conveyed from the developer container in a first direction;

a contact terminal located at the second side of the developing frame; and

a memory electrically connected to the contact terminal,

wherein the first side is downstream in the first direction from the second side, and

wherein each of the pressing members includes a spring.

2. The image forming device according to claim 1 ,

wherein the contact terminal includes a plane of contact, and

wherein the plane of contact of the contact terminal is perpendicular to the first direction.

3. The image forming device according to claim 1 ,

wherein the contact terminal includes a plane of contact, and

wherein the plane of contact of the contact terminal is parallel to the second side.

4. The image forming device according to claim 1 , wherein pressing forces supplied by the pressing members are symmetric with respect to a center position in an axis direction of the developing roller.

5. The image forming device according to claim 1 , wherein the pressing members are symmetric with respect to a center position in an axis direction of the developing roller.

6. The image forming device according to claim 1 , wherein one of the pressing members lacks a main-body terminal.

7. An image forming device comprising:

a main body;

a cover connected to the body, the cover including pressing members in which at least one of the pressing members includes at least one main-body terminal connected to an electric circuit;

a photosensitive drum supported by the main body;

a developing cartridge including:

a developing frame defining a developer container configured to contain developer, the developing frame having a first side and a second side;

a developing roller located at the first side of the developing frame so as to receive developer conveyed from the developer container in a first direction;

a contact terminal located at the second side of the developing frame; and

a memory electrically connected to the contact terminal,

wherein the first side is downstream in the first direction from the second side, and

wherein one of the pressing members lacks a main body terminal.

8. The image forming device according to claim 7 ,

wherein the contact terminal includes a plane of contact, and

wherein the plane of contact of the contact terminal is perpendicular to the first direction.

9. The image forming device according to claim 7 ,

wherein the contact terminal includes a plane of contact, and

wherein the plane of contact of the contact terminal is parallel to the second side.

10. The image forming device according to claim 7 , wherein pressing forces supplied by the pressing members are symmetric with respect to a center position in an axis direction of the developing roller.

11. The image forming device according to claim 7 , wherein the pressing members are symmetric with respect to a center position in an axis direction of the developing roller.

12. An image forming device comprising:

a main body;

a cover connected to the body, the cover including pressing members in which at least one of the pressing members includes at least one main-body terminal connected to an electric circuit;

a photosensitive drum supported by the main body;

a developing cartridge including:

a developing frame defining a developer container configured to contain developer, the developing frame having a first side and a second side;

a developing roller located at the first side of the developing frame so as to receive developer conveyed from the developer container in a first direction;

a contact terminal located at the second side of the developing frame; and

a memory electrically connected to the contact terminal,

wherein the first side is downstream in the first direction from the second side, and

wherein pressing forces supplied by the pressing members are symmetric with respect to a center position in an axis direction of the developing roller.

13. The image forming device according to claim 12 ,

wherein the contact terminal includes a plane of contact, and

wherein the plane of contact of the contact terminal is perpendicular to the first direction.

14. The image forming device according to claim 12 ,

wherein the contact terminal includes a plane of contact, and

wherein the plane of contact of the contact terminal is parallel to the second side.

15. The image forming device according to claim 12 , wherein the pressing members are symmetric with respect to a center position in an axis direction of the developing roller.

16. An image forming device comprising:

a main body;

a cover connected to the body, the cover including pressing members in which at least one of the pressing members includes at least one main-body terminal connected to an electric circuit;

a photosensitive drum supported by the main body;

a developing cartridge including:

a developing frame defining a developer container configured to contain developer, the developing frame having a first side and a second side;

a developing roller located at the first side of the developing frame so as to receive developer conveyed from the developer container in a first direction;

a contact terminal located at the second side of the developing frame; and

a memory electrically connected to the contact terminal,

wherein the first side is downstream in the first direction from the second side, and

wherein the pressing members are symmetric with respect to a center position in an axis direction of the developing roller.

17. The image forming device according to claim 16 ,

wherein the contact terminal includes a plane of contact, and

wherein the plane of contact of the contact terminal is perpendicular to the first direction.

18. The image forming device according to claim 16 ,

wherein the contact terminal includes a plane of contact, and

wherein the plane of contact of the contact terminal is parallel to the second side.

19. An image forming device comprising:

a main body;

a cover connected to the body, the cover including pressing members in which at least one of the pressing members includes at least one main-body terminal connected to an electric circuit;

a photosensitive drum supported by the main body;

a developing cartridge including:

a developing frame defining a developer container configured to contain developer, the developing frame having a first side and a second side;

a developing roller located at the first side of the developing frame;

a contact terminal located at the second side of the developing frame; and

a memory electrically connected to the contact terminal,

wherein the developing cartridge is configured to be inserted into the main body in a first direction,

wherein the first side is downstream in the first direction from the second side,

wherein the contact terminal includes a plane of contact,

wherein the plane of contact of the contact terminal is perpendicular to the first direction, and

wherein each pressing member includes a spring.

20. The image forming device according to claim 19 ,

wherein the contact terminal includes a plane of contact, and

wherein the plane of contact of the contact terminal is parallel to the second side.

21. The image forming device according to claim 19 , wherein pressing forces supplied by the pressing members are symmetric with respect to a center position in an axis direction of the developing roller.

22. The image forming device according to claim 19 , wherein the pressing members are symmetric with respect to a center position in an axis direction of the developing roller.

23. The image forming device according to claim 19 , wherein one of the pressing members lacks a main-body terminal.

24. An image forming device comprising:

a main body;

a cover connected to the body, the cover including pressing members in which at least one of the pressing members includes at least one main-body terminal connected to an electric circuit;

a photosensitive drum supported by the main body;

a developing cartridge including:

a developing frame defining a developer container configured to contain developer, the developing frame having a first side and a second side;

a developing roller located at the first side of the developing frame;

a contact terminal located at the second side of the developing frame; and

a memory electrically connected to the contact terminal,

wherein the developing cartridge is configured to be inserted into the main body in a first direction,

wherein the first side is downstream in the first direction from the second side,

wherein the contact terminal includes a plane of contact,

wherein the plane of contact of the contact terminal is perpendicular to the first direction, and

wherein one of the pressing members lacks a main body terminal.

25. The image forming device according to claim 24 ,

wherein the contact terminal includes a plane of contact, and

wherein the plane of contact of the contact terminal is parallel to the second side.

26. The image forming device according to claim 24 , wherein pressing forces supplied by the pressing members are symmetric with respect to a center position in an axis direction of the developing roller.

27. The image forming device according to claim 24 , wherein the pressing members are symmetric with respect to a center position in an axis direction of the developing roller.

28. An image forming device comprising:

a main body;

a cover connected to the body, the cover including pressing members in which at least one of the pressing members includes at least one main-body terminal connected to an electric circuit;

a photosensitive drum supported by the main body;

a developing cartridge including:

a developing frame defining a developer container configured to contain developer, the developing frame having a first side and a second side;

a developing roller located at the first side of the developing frame;

a contact terminal located at the second side of the developing frame; and

a memory electrically connected to the contact terminal,

wherein the developing cartridge is configured to be inserted into the main body in a first direction,

wherein the first side is downstream in the first direction from the second side, and

wherein pressing forces supplied by the pressing members are symmetric with respect to a center position in an axis direction of the developing roller.

29. The image forming device according to claim 28 ,

wherein the contact terminal includes a plane of contact, and

wherein the plane of contact of the contact terminal is perpendicular to the first direction.

30. The image forming device according to claim 28 ,

wherein the contact terminal includes a plane of contact, and

wherein the plane of contact of the contact terminal is parallel to the second side.

31. The image forming device according to claim 28 , wherein the pressing members are symmetric with respect to a center position in an axis direction of the developing roller.

32. An image forming device comprising:

a main body;

a cover connected to the body, the cover including pressing members in which at least one of the pressing members includes at least one main-body terminal connected to an electric circuit;

a photosensitive drum supported by the main body;

a developing cartridge including:

a developing frame defining a developer container configured to contain developer, the developing frame having a first side and a second side;

a developing roller located at the first side of the developing frame;

a contact terminal located at the second side of the developing frame; and

a memory electrically connected to the contact terminal,

wherein the developing cartridge is configured to be inserted into the main body in a first direction,

wherein the first side is downstream in the first direction from the second side,

wherein the contact terminal includes a plane of contact,

wherein the plane of contact of the contact terminal is perpendicular to the first direction, and

wherein pressing members are symmetric with respect to a center position in an axis direction of the developing roller.

33. The image forming device according to claim 32 ,

wherein the contact terminal includes a plane of contact, and

wherein the plane of contact of the contact terminal is parallel to the second side.