Image forming apparatus and developer cartridge thereof

摘要

An image forming apparatus, a developing device and a developer cartridge are disclosed. The developer cartridge (60) includes a cartridge housing (61) and a developer delivery unit (90) to deliver a developer received in the cartridge housing (61). The developer delivery unit (90) includes a delivery member (92) and a contact portion (100) to come into contact with the delivery member (92). The contact between the contact portion (100) and the delivery member (92) form a length longer than a straight line connecting one end of the contact portion (100) to the other end.