Abstract: An example image forming apparatus includes a frame, a first shaft supported by the frame, and a first coupler. The first coupler includes a body coupled to one end of the first shaft and a first protrusion protruding from the body in an axial direction of the first shaft, the first protrusion having a first surface and a second protrusion protruding from the first surface. The second protrusion is to lock with a groove to mount a cartridge on the frame, the first shaft is to provide a rotational force in a first rotational direction to rotate the second protrusion of the first coupler and to insert the second protrusion into the groove to lock with the cartridge, and the first surface of the first protrusion of the first coupler is to contact a second surface to transmit the rotational force to the second coupler in the first rotational direction.

Abstract: An example image forming apparatus includes a frame, a first shaft supported by the frame, and a first coupler. The first coupler includes a body coupled to one end of the first shaft and a first protrusion protruding from the body in an axial direction of the first shaft, the first protrusion having a first surface and a second protrusion protruding from the first surface. The second protrusion is to lock with a groove to mount a cartridge on the frame, the first shaft is to provide a rotational force in a first rotational direction to rotate the second protrusion of the first coupler and to insert the second protrusion into the groove to lock with the cartridge, and the first surface of the first protrusion of the first coupler is to contact a second surface to transmit the rotational force to the second coupler in the first rotational direction.

Abstract: An example image forming apparatus includes a frame, a first shaft supported by the frame, and a first coupler. The first coupler includes a body coupled to one end of the first shaft and a first protrusion protruding from the body in an axial direction of the first shaft, the first protrusion having a first surface and a second protrusion protruding from the first surface. The second protrusion is to lock with a groove to mount a cartridge on the frame, the first shaft is to provide a rotational force in a first rotational direction to rotate the second protrusion of the first coupler and to insert the second protrusion into the groove to lock with the cartridge, and the first surface of the first protrusion of the first coupler is to contact a second surface to transmit the rotational force to the second coupler in the first rotational direction.

Abstract: An example image forming apparatus includes a main body, a driving motor rotatable in a first direction to provide a driving force to a developing cartridge and rotatable in a second direction opposite to the first direction, and a support assembly to, based on the developing cartridge being mounted to the main body, provide the driving force of the driving motor in the first direction to the mounted developing cartridge, and detach the mounted developing cartridge from the main body using the driving force of the driving motor in the second direction.

Abstract: An example image forming apparatus includes a frame, a first shaft supported by the frame, and a first coupler. The first coupler includes a body coupled to one end of the first shaft and a first protrusion protruding from the body in an axial direction of the first shaft, the first protrusion having a first surface and a second protrusion protruding from the first surface. The second protrusion is to lock with a groove to mount a cartridge on the frame, the first shaft is to provide a rotational force in a first rotational direction to rotate the second protrusion of the first coupler and to insert the second protrusion into the groove to lock with the cartridge, and the first surface of the first protrusion of the first coupler is to contact a second surface to transmit the rotational force to the second coupler in the first rotational direction.

Abstract: An image forming apparatus according to an example includes a main body, a driving coupler to drive a toner cartridge. The driving coupler is rotatable in a direction, a locking protrusion protrudes from an axial protrusion of the driving coupler in the direction of the driving shaft is lockable into a locking groove concavely formed in the direction of the driving shaft of a passive coupler of the toner cartridge. A driving force transmission surface of the axial protrusion of the driving coupler and a driving force receiving surface of the passive coupler are to contact each other to rotate the passive coupler in the direction.

Abstract: An image forming apparatus according to an example includes a main body, a driving coupler to drive a toner cartridge. The driving coupler is rotatable in a direction, a locking protrusion protrudes from an axial protrusion of the driving coupler in the direction of the driving shaft is lockable into a locking groove concavely formed in the direction of the driving shaft of a passive coupler of the toner cartridge. A driving force transmission surface of the axial protrusion of the driving coupler and a driving force receiving surface of the passive coupler are to contact each other to rotate the passive coupler in the direction.

Abstract: An example image forming apparatus includes a main body, a driving motor rotatable in a first direction to provide a driving force to a developing cartridge and rotatable in a second direction opposite to the first direction, and a support assembly to, based on the developing cartridge being mounted to the main body, provide the driving force of the driving motor in the first direction to the mounted developing cartridge, and detach the mounted developing cartridge from the main body using the driving force of the driving motor in the second direction.

Abstract: A development cartridge attachable to and detachable from a main body of an image forming apparatus includes a photosensitive unit including a photosensitive drum, a developing unit including a developing roller and rotatably coupled to the photosensitive unit with respect to a hinge axis, a driving gear configured to rotate in a first direction for a printing operation or a second direction opposite the first direction, a driving member positioned coaxially with the driving gear and configured to be rotated by the driving gear, a first one-way clutch configured to connect the driving member with the driving gear only when the driving gear rotates in the second direction, and a first moving member configured to be connected to the driving member so as to reciprocate between a first location where a development nip is formed and a second location where the development nip is released.

Abstract: A development cartridge attachable to and detachable from a main body of an image forming apparatus includes a photosensitive unit including a photosensitive drum, a developing unit including a developing roller and rotatably coupled to the photosensitive unit with respect to a hinge axis, a driving gear configured to rotate in a first direction for a printing operation or a second direction opposite the first direction, a driving member positioned coaxially with the driving gear and configured to be rotated by the driving gear, a first one-way clutch configured to connect the driving member with the driving gear only when the driving gear rotates in the second direction, and a first moving member configured to be connected to the driving member so as to reciprocate between a first location where a development nip is formed and a second location where the development nip is released.

Abstract: A power transmitting apparatus includes a shaft, first and second passive members mounted on the shaft to be rotatable, and a driving member that is mounted on the shaft and rotates in connection with a driving source, and that according to a rotation direction, slides toward the first and second passive members along the shaft, so as to selectively establish a power connection with the first and second passive members.

Abstract: A power transmitting apparatus includes a shaft, first and second passive members mounted on the shaft to be rotatable, and a driving member that is mounted on the shaft and rotates in connection with a driving source, and that according to a rotation direction, slides toward the first and second passive members along the shaft, so as to selectively establish a power connection with the first and second passive members.