Abstract: In a developing cartridge, a developing roller extends in a first direction. A developing roller gear, a coupling, and first and second idle gears are positioned at an outer surface of a casing. An agitator gear has an end face in the first direction facing the outer surface. A first protrusion is positioned between the end face and the outer surface, and at a position outside of addendum circles of the developing roller gear, coupling, and first and second idle gears. The first protrusion is pivotally movable about an axis extending in the first direction between a first position and a second position. A first protruding portion has, at the first position, a first length in a second direction connecting the developing roller and the first protruding portion, and has, at the second position, a second length different from the first length in the second direction.

Abstract: A developing cartridge may include: a casing; a developing roller extending in a first direction; a developing-roller gear; a coupling including a coupling gear; a first idle gear; a second idle gear; an agitator; a first agitator gear; and a protrusion. The developing-roller gear, the coupling, the first idle gear, the second idle gear, the first agitator gear, and the protrusion may be positioned at an outer surface of the casing. The protrusion may be positioned between a first axis of the coupling and a third axis of the first agitator gear in a second direction connecting the first and third axes. The protrusion may be positioned outside an addendum circle of the developing-roller gear, an addendum circle of the coupling gear, an addendum circle of the first idle gear, and an addendum circle of the second idle gear. The first agitator gear may be spaced apart from the protrusion in the first direction.

Abstract: A developer cartridge comprises a first gear. The first gear may include a first protrusion extending in a radial direction of the first gear. The first protrusion may be positioned at a circumference of a column of the first gear. The first protrusion may be spaced apart from a second end face opposite to a first end face facing an exterior surface of a casing configured to accommodate developer therein. The first protrusion may be further from the second end face than a large-diameter gear in an axial direction. A rotational circumference of the first protrusion defined by rotation of the first protrusion and a portion of the large-diameter gear are aligned in the axial direction.

Abstract: A developing cartridge includes a casing and a developing roller. The casing has an accommodation chamber, first and second ribs, a handle, and first and second pressure members. The accommodation chamber has one end portion and another end portion in a first direction, and an outer surface. The developing roller is positioned at one side of the accommodation chamber in a second direction. The ribs, the handle, and the pressure members are positioned at another side of the accommodation chamber in the second direction. The ribs and the pressure members are positioned at the outer surface. The handle is positioned between the first rib and the second rib in the first direction. The first pressure member is positioned between the handle and the first rib in the first direction. The second pressure member is positioned between the handle and the second rib in the first direction.

Abstract: A developing cartridge may include a housing including an outer surface, a small-diameter gear, a large-diameter gear, a first gear, and a moving member. The small-diameter gear may include a first engaging portion positioned on at least a portion of a peripheral surface of the small-diameter gear. The large-diameter gear may be positioned farther from the outer surface than the small-diameter gear from the outer surface. The large-diameter gear may be rotatable together with the small-diameter gear. The first gear may include a second engaging portion, a first end surface, a second end surface, and at least one protrusion. The moving member may include a contact portion configured to move the moving member from one position to another position in a state where the contact portion is in contact with the protrusion.

Abstract: A toner cartridge includes a casing, an auger rotatable about an axis extending in a first direction, an auger gear rotatable with the auger, an agitator aligned with the auger in a second direction, an agitator gear rotatable with the agitator, and a detection gear positioned opposite to the auger gear with respect to the agitator gear in the second direction. The detection gear is rotatable from a first position to a second position. At the first position, a through-hole or a cutout of the detection gear is positioned farther away from the auger than an outer surface of another end portion of the casing in the second direction is. At the second position, a portion of the detection gear different from the through-hole or the cutout is positioned farther away from the auger than the outer surface of the another end portion of the casing is.

Abstract: An image-forming apparatus includes: a housing formed with an opening part; and a process cartridge detachably attachable to the housing through the opening part in a first direction. The housing includes a first support part arranged at the opening part, and a cover movable between a closed position and an opened position. The cover includes a second support part positioned away from the first support part in the first direction when the cover is at the opened position. The process cartridge includes: a drum cartridge having a drum frame; and a toner cartridge detachably attachable to the drum frame. When the cover is at the opened position, the first support part and the second support part are configured to support the drum frame of the process cartridge detached from the housing to restrict displacement of the drum frame in the first direction.

Abstract: In a developing cartridge, a developing roller extends in a first direction. A developing roller gear, a coupling, and first and second idle gears are positioned at an outer surface of a casing. An agitator gear has an end face in the first direction facing the outer surface. A first protrusion is positioned between the end face and the outer surface, and at a position outside of addendum circles of the developing roller gear, coupling, and first and second idle gears. The first protrusion is pivotally movable about an axis extending in the first direction between a first position and a second position. A first protruding portion has, at the first position, a first length in a second direction connecting the developing roller and the first protruding portion, and has, at the second position, a second length different from the first length in the second direction.

Abstract: A developer cartridge comprises a first gear. The first gear may include a first protrusion extending in a radial direction of the first gear. The first protrusion may be positioned at a circumference of a column of the first gear. The first protrusion may be spaced apart from a second end face opposite to a first end face facing an exterior surface of a casing configured to accommodate developer therein. The first protrusion may be further from the second end face than a large-diameter gear in an axial direction. A rotational circumference of the first protrusion defined by rotation of the first protrusion and a portion of the large-diameter gear are aligned in the axial direction.

Abstract: A developer cartridge comprises a first gear. The first gear may be rotatable about a first axis extending in an axial direction. The first gear may include a first surface rotatable with the first gear, and a second surface rotatable with the first gear. The first surface may extend in a circumferential direction of the first gear. The second surface may extend in the circumferential direction. The second surface may be separated from the first surface in the circumferential direction. A length of the second surface in the circumferential direction may be greater than a length of the first surface in the circumferential direction.

Abstract: A developing cartridge may include: a casing; a developing roller extending in a first direction; a developing-roller gear; a coupling including a coupling gear; a first idle gear; a second idle gear; an agitator; a first agitator gear; and a protrusion. The developing-roller gear, the coupling, the first idle gear, the second idle gear, the first agitator gear, and the protrusion may be positioned at an outer surface of the casing. The protrusion may be positioned between a first axis of the coupling and a third axis of the first agitator gear in a second direction connecting the first and third axes. The protrusion may be positioned outside an addendum circle of the developing-roller gear, an addendum circle of the coupling gear, an addendum circle of the first idle gear, and an addendum circle of the second idle gear. The first agitator gear may be spaced apart from the protrusion in the first direction.

Abstract: A developing cartridge may include a housing including an outer surface, a small-diameter gear, a large-diameter gear, a first gear, and a moving member. The small-diameter gear may include a first engaging portion positioned on at least a portion of a peripheral surface of the small-diameter gear. The large-diameter gear may be positioned farther from the outer surface than the small-diameter gear from the outer surface. The large-diameter gear may be rotatable together with the small-diameter gear. The first gear may include a second engaging portion, a first end surface, a second end surface, and at least one protrusion. The moving member may include a contact portion configured to move the moving member from one position to another position in a state where the contact portion is in contact with the protrusion.

Abstract: In a developing cartridge, a first supporting member is attached to a housing and has a first developing supporting portion and a driving-force-receiving-member supporting portion. The first developing supporting portion is configured to rotatably support a first part of a rotational shaft and the driving-force-receiving-member supporting portion is configured to rotatably support a driving-force-receiving member. The second supporting member is attached to the housing and has a second developing supporting portion and a detection-rotational-body supporting portion. The second developing supporting portion is configured to rotatably support a second part of the rotational shaft and the detection-rotational-body supporting portion is configured to rotatably support a detection rotational body.

Abstract: In a developing cartridge, a first supporting member is attached to a housing and has a first developing supporting portion and a driving-force-receiving-member supporting portion. The first developing supporting portion is configured to rotatably support a first part of a rotational shaft and the driving-force-receiving-member supporting portion is configured to rotatably support a driving-force-receiving member. The second supporting member is attached to the housing and has a second developing supporting portion and a detection-rotational-body supporting portion. The second developing supporting portion is configured to rotatably support a second part of the rotational shaft and the detection-rotational-body supporting portion is configured to rotatably support a detection rotational body.

Abstract: A developing cartridge may include a housing including an outer surface, a small-diameter gear, a large-diameter gear, a first gear, and a moving member. The small-diameter gear may include a first engaging portion positioned on at least a portion of a peripheral surface of the small-diameter gear. The large-diameter gear may be positioned farther from the outer surface than the small-diameter gear from the outer surface. The large-diameter gear may be rotatable together with the small-diameter gear. The first gear may include a second engaging portion, a first end surface, a second end surface, and at least one protrusion. The moving member may include a contact portion configured to move the moving member from one position to another position in a state where the contact portion is in contact with the protrusion.

Abstract: A developing cartridge includes a casing and a developing roller. The casing has an accommodation chamber, first and second ribs, a handle, and first and second pressure members. The accommodation chamber has one end portion and another end portion in a first direction, and an outer surface. The developing roller is positioned at one side of the accommodation chamber in a second direction. The ribs, the handle, and the pressure members are positioned at another side of the accommodation chamber in the second direction. The ribs and the pressure members are positioned at the outer surface. The handle is positioned between the first rib and the second rib in the first direction. The first pressure member is positioned between the handle and the first rib in the first direction. The second pressure member is positioned between the handle and the second rib in the first direction.

Abstract: In a developing cartridge, a developing roller extends in a first direction. A developing roller gear, a coupling, and first and second idle gears are positioned at an outer surface of a casing. An agitator gear has an end face in the first direction facing the outer surface. A first protrusion is positioned between the end face and the outer surface, and at a position outside of addendum circles of the developing roller gear, coupling, and first and second idle gears. The first protrusion is pivotally movable about an axis extending in the first direction between a first position and a second position. The first protruding portion has, at the first position, a first length in a second direction connecting the developing roller and the first protruding portion, and has, at the second position, a second length different from the first length in the second direction.

Abstract: An image-forming apparatus includes: a housing formed with an opening part; and a process cartridge detachably attachable to the housing through the opening part in a first direction. The housing includes a first support part arranged at the opening part, and a cover movable between a closed position and an opened position. The cover includes a second support part positioned away from the first support part in the first direction when the cover is at the opened position. The process cartridge includes: a drum cartridge having a drum frame; and a toner cartridge detachably attachable to the drum frame. When the cover is at the opened position, the first support part and the second support part are configured to support the drum frame of the process cartridge detached from the housing to restrict displacement of the drum frame in the first direction.