| CPC G03G 21/1647 (2013.01) [G03G 21/1676 (2013.01)] | 10 Claims |
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1. A developing device mountable on an image forming apparatus, the developing device comprising:
a main body portion including a developer container configured to accommodate a developer containing toner and a carrier, and a developer carrying member configured to carry and feed the developer to a developing position where an electrostatic image formed on an image bearing member is developed;
a fixing portion fixed to the image forming apparatus to mount the developing device on the image forming apparatus in a state in which the main body portion is positioned in the image forming apparatus and the fixing portion is positioned in the image forming apparatus;
a connecting portion configured to connect the main body portion and the fixing portion;
a toner replenishing port provided to the fixing portion and where the toner is replenished from the image forming apparatus;
a connection port provided to the main body portion and connecting to the developer container for supplying the toner replenished through the toner replenishing port to the developer container;
a toner conveyance path provided between the main body portion and the fixing portion and through which the toner is capable of communicating between the toner replenishing port and the connection port; and
an urging portion, when a first moment is defined as a moment which is generated in the fixing portion due to own weight about the connecting portion as a rotation center in a state in which the main body portion is positioned in the image forming apparatus and the fixing portion is not positioned in the image forming apparatus, configured to urge the fixing portion so as to generate a second moment in an opposite direction to the first moment to the fixing portion about the connecting portion as the rotation center in a state in which the main body portion is positioned in the image forming apparatus and the fixing portion is not positioned in the image forming apparatus, and
wherein in a case where the developing device is pressed by a pressing portion of the image forming apparatus in a state in which the fixing portion is fixed to the image forming apparatus, the main body portion is rotated about the connecting portion as the rotation center so that the developer carrying member is moved from a separated position separated from the developing position to the developing position.
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