Abstract: An example developing device includes a developing case, a developer supply portion connected to the developing case and including a supply port, a shutter to open or close the supply port, and a sealing member attached to an outer circumferential portion of the developer supply portion to prevent leakage of a developer through the developer supply portion and the shutter. The developer supply portion includes a slit portion adjacent to the supply port. The sealing member includes a film member having an opening in communication with the supply port, a fixing portion inserted into the slit portion, and an elastic sealing member. An upper surface of the film member contacts an inner circumferential portion of the shutter, and the elastic sealing member is attached onto a lower surface of the film member along an edge of the opening and surrounds the supply port.

Abstract: An example developing device includes a developing case, a developer supply portion connected to the developing case and including a supply port, a shutter to open or close the supply port, and a sealing member attached to an outer circumferential portion of the developer supply portion to prevent leakage of a developer through the developer supply portion and the shutter. The developer supply portion includes a slit portion adjacent to the supply port. The sealing member includes a film member having an opening in communication with the supply port, a fixing portion inserted into the slit portion, and an elastic sealing member. An upper surface of the film member contacts an inner circumferential portion of the shutter, and the elastic sealing member is attached onto a lower surface of the film member along an edge of the opening and surrounds the supply port.

Abstract: A toner cartridge includes a housing having a first combining portion and a front cover attached to a front end of the housing in a longitudinal direction, wherein the front cover includes a first locking portion to which the first combining portion is to be attached and a notch portion provided in the first locking portion so that the first locking portion is breakable by an external force in a direction in which the front cover is spaced apart from the housing in the longitudinal direction.

Abstract: An image forming apparatus includes a main body provided with a mounting portion and an interference member, and a toner cartridge inserted into the mounting portion. The toner cartridge includes a housing containing toner, a coupling portion, a front cover coupled to one end of the housing via the coupling portion, and a switching member to weaken a coupling force of the coupling portion by interfering with the interference member when the toner cartridge is mounted on the mounting portion.

Abstract: An example image forming apparatus includes a toner cartridge, a photoconductive cartridge including a photosensitive drum, a development cartridge including a toner inlet portion and rotatable between a first position at which a developing roller is close to the photosensitive drum and a second position at which the developing roller is apart from the photosensitive drum, with respect to a hinge axis that is parallel to an axial direction of the developing roller and between the developing roller and the toner inlet portion, a buffer unit including a toner discharge portion to receive toner from the toner cartridge and to supply the toner to the development cartridge, and a toner supply duct connecting the toner discharge portion to the toner inlet portion, the toner supply duct being rotatably connected to the toner discharge portion in a direction allowing rotation of the development cartridge between the first and the second position.

Abstract: An image forming apparatus includes a main body provided with a mounting portion and an interference member, and a toner cartridge inserted into the mounting portion. The toner cartridge includes a housing containing toner, a coupling portion, a front cover coupled to one end of the housing via the coupling portion, and a switching member to weaken a coupling force of the coupling portion by interfering with the interference member when the toner cartridge is mounted on the mounting portion.

Abstract: An example image forming apparatus includes a toner cartridge, a photoconductive cartridge including a photosensitive drum, a development cartridge including a toner inlet portion and rotatable between a first position at which a developing roller is close to the photosensitive drum and a second position at which the developing roller is apart from the photosensitive drum, with respect to a hinge axis that is parallel to an axial direction of the developing roller and between the developing roller and the toner inlet portion, a buffer unit including a toner discharge portion to receive toner from the toner cartridge and to supply the toner to the development cartridge, and a toner supply duct connecting the toner discharge portion to the toner inlet portion, the toner supply duct being rotatably connected to the toner discharge portion in a direction allowing rotation of the development cartridge between the first and the second position.