Device for preventing a developer cartridge of an image forming apparatus from being mistakenly installed or removed

1. An image forming apparatus comprising:

a rotating type developing unit including:

a developing unit main body which is rotatable;

a plurality of developing units disposed along a direction of rotation of the developing unit main body; and

at least one developer cartridge which is disposed along the direction of rotation of the developing unit main body and supplies a developer to the developing unit;

an image forming unit including at least one image carrier which is disposed to be opposed to at least a portion of the developer cartridge and configured to be installable and removable to and from the image forming apparatus;

a cover allowing the developer cartridge to be installed and removed at a position of interchanging the developer cartridge in a state of being mounted with the image forming unit; and

an operation hampering member hampering at least a portion of the developer cartridge which is not disposed at an interchanging position and which is exposed from a space from which the image forming unit is removed from being installed or removed while the image forming unit is removed,

wherein the developer cartridge is configured to be installable and removable in a direction orthogonal to a rotating shaft; and

wherein the operation hampering member comprises a projection disposed in the vicinity of one end portion in an axial direction of the rotating type developing unit and extended from the image forming apparatus along a longitudinal direction of the developer cartridge.

2. The image forming apparatus according to claim 1 , wherein at least a portion of the image forming unit is disposed along a rotating outer peripheral face of the rotating type developing unit.

3. An image forming apparatus comprising:

a rotating type developing unit including:

a developing unit main body which is rotatable;

a plurality of developing units disposed along a direction of rotation of the developing unit main body; and

at least one developer cartridge which is disposed along the direction of the rotation of the developing unit main body, the developer cartridge supplying a developer to the developing unit, the developer cartridge comprising a handle;

an image forming unit including at least one image carrier which is disposed to be opposed to at least a portion of the developer cartridge and configured to be installable and removable to and from the image forming apparatus;

a cover allowing the developer cartridge to be installed and removed at an interchanging position of the developer cartridge in a state where the image forming unit is installed in the image forming apparatus;

an operation hampering member that is brought into contact with the handle of the developer cartridge, which is not disposed at the interchanging position, to hamper a supply port of the developer cartridge from being closed,

wherein:

the developer cartridge is configured to be installable and removable in a direction orthogonal to a rotating shaft of the developing unit main body, and

the handle of the developer cartridge is rotated to open and close the supply port through which the developer is supplied to the developing unit.

4. The image forming apparatus according to claim 3 , wherein the handle of the developer cartridge projects toward an outer side of a locus of rotation of the rotating type developing unit.

5. The image forming apparatus according to claim 3 , wherein at least the portion of the developer cartridge opening and closing the supply port is the developer cartridge per se a sectional shape of which is formed in a noncircular shape.

6. An image forming apparatus comprising:

a rotating type developing unit including:

a developing unit main body which is rotatable;

a plurality of developing units disposed along a direction of rotation of the developing unit main body; and

at least one developer cartridge which is disposed along the direction of rotation of the developing unit main body and supplies a developer to the developing unit;

an image forming unit including at least one image carrier which is disposed to be opposed to at least a portion of the developer cartridge and constituted to be installable and removable to and from the image forming apparatus;

a cover allowing the developer cartridge to be installed and removed at a position of interchanging the developer cartridge in a state of being mounted with the image forming unit; and

an operation hampering member which hampers at least a portion of the developer cartridge which is not disposed at an interchanging position from being operated in a direction of closing a supply port of the developer cartridge,

wherein the developer cartridge is configured to be installable and removable in a direction orthogonal to a rotating shaft of the developing unit main body and opening and closing the supply port which supplies the developer to the developing unit by operating at least a portion of the developer cartridge;

wherein at least the portion of the developer cartridge opening and closing the supply port is a handle disposed at an opening and closing member which opens and closes the supply port, and

wherein an operation of opening and closing the supply port is a pivoting operation, the handle of the opening and closing member pivoted by the pivoting operation is projected to an outer side of a locus of rotating the rotating type developing unit, and the operation hampering member hampers the opening and closing member from being pivoted by being brought into contact with the opening and closing member.