Abstract: A developing cartridge includes a developing electrode and a supply electrode. The developing electrode includes a first electrical contact in contact with a developing roller shaft, and a second electrical contact positioned closer to the developing roller shaft than a second agitator gear is to the developing roller shaft. The second electrical contact is positioned farther from the developing roller shaft than the first electrical contact is from the developing roller shaft. The supply electrode includes a first electrical contact in contact with the supply roller shaft, and a second electrical contact positioned closer to the developing roller shaft than the second agitator gear is to the developing roller shaft. The second electrical contact of the supply electrode is positioned farther from the developing roller shaft than the second electrical contact of the developing electrode is from the developing roller shaft.

Abstract: Toner cartridge includes a housing, an agitator, an auger, a first protrusion, and a second protrusion. The housing includes a first toner accommodating portion having and a second toner accommodating portion. The auger is rotatable about a second axis extending in a first direction and is configured to convey toner from a first toner accommodating portion to the second toner accommodating portion. The first protrusion is positioned at a first side of the second toner accommodating portion. The first protrusion extends in the first direction. The second protrusion is positioned at a second side of the second toner accommodating portion and extends in the first direction.

Abstract: A developing cartridge includes: a lever movable between a first position and a second position; an urging member urging the lever toward the first position; a gear; and a first and a second protrusions that are rotatable together with the gear. During rotation of the gear from a first rotational position to a second rotational position, the first protrusion moves the lever to the second position against urging force of the urging member and then the lever moves to the first position at a first speed while contacting the first protrusion. During rotation of the gear from the second rotational position to a third rotational position, the second protrusion moves the lever to the second position against the urging force. When the gear reaches the third rotational position, the urging force moves the lever to the first position at a second speed higher than the first speed.

Abstract: A developing cartridge includes first and second rotary members. The first rotary member is rotatable from a first position to a second position and from the second position to a third position, and includes a first gear part and a first rib. The first rib extends along an addendum circle of the first gear part. The second rotary member includes a second gear part and a second rib protruding outward in a radial direction of the second rotary member. The second rib is in contact the first rib during rotation of the first rotary member from the first position toward the second position. The second rib is separated from the first rib during rotation of the first rotary member from the second position toward the third position.

Abstract: Toner cartridge includes a housing, an agitator, an auger, a first protrusion, and a second protrusion. The housing includes a first toner accommodating portion having and a second toner accommodating portion. The auger is rotatable about a second axis extending in a first direction and is configured to convey toner from a first toner accommodating portion to the second toner accommodating portion. The first protrusion is positioned at a first side of the second toner accommodating portion. The first protrusion extends in the first direction. The second protrusion is positioned at a second side of the second toner accommodating portion and extends in the first direction.

Abstract: A developing cartridge includes a lever, an urging member, a first gear, a second gear, and a protrusion rotatable together therewith. The lever is movable between a first position and a second position. The urging member urges the lever toward the first position. The first gear includes first and second gear portions. The second gear portion has an addendum circle greater than that of the first gear portion. The second gear includes a third gear portion engageable with the first gear portion and a fourth gear portion engageable with the second gear portion. The fourth gear portion has an addendum circle smaller than that of the third gear portion. In a case where the second gear rotates while engaging with the fourth gear portion, the protrusion contacts the lever to move the lever from the first position to the second position against urging force of the urging member.

Abstract: A developing cartridge includes a lever, an urging member, a first gear, a second gear, and a protrusion rotatable together therewith. The lever is movable between a first position and a second position. The urging member urges the lever toward the first position. The first gear includes first and second gear portions. The second gear portion has an addendum circle greater than that of the first gear portion. The second gear includes a third gear portion engageable with the first gear portion and a fourth gear portion engageable with the second gear portion. The fourth gear portion has an addendum circle smaller than that of the third gear portion. In a case where the second gear rotates while engaging with the fourth gear portion, the protrusion contacts the lever to move the lever from the first position to the second position against urging force of the urging member.

Abstract: A developing cartridge includes: a lever movable between a first position and a second position; an urging member urging the lever toward the first position; a gear; and a first and a second protrusions that are rotatable together with the gear. During rotation of the gear from a first rotational position to a second rotational position, the first protrusion moves the lever to the second position against urging force of the urging member and then the lever moves to the first position at a first speed while contacting the first protrusion. During rotation of the gear from the second rotational position to a third rotational position, the second protrusion moves the lever to the second position against the urging force. When the gear reaches the third rotational position, the urging force moves the lever to the first position at a second speed higher than the first speed.

Abstract: A flow-rate control unit is constituted by a sensor model storage unit, a flow-rate simulation value output unit that outputs a flow-rate simulation value which is a flow-rate value that the sensor model outputs when a flow-rate setting value is input, a feedback control unit that outputs a flow-rate feedback value based on a deviation between a flow-rate measurement value and the flow-rate simulation value, and a valve control unit that controls a valve application voltage that is applied to a valve based on the flow-rate feedback value and a flow-rate feedforward value that is calculated from the flow-rate setting value, and the flow-rate simulation value output unit is configured to output the flow-rate simulation value in a state where a predetermined time delay exists with respect to the flow-rate setting value.

Abstract: A developing cartridge includes a developing electrode and a supply electrode. The developing electrode includes a first electrical contact in contact with a developing roller shaft, and a second electrical contact positioned closer to the developing roller shaft than a second agitator gear is to the developing roller shaft. The second electrical contact is positioned farther from the developing roller shaft than the first electrical contact is from the developing roller shaft. The supply electrode includes a first electrical contact in contact with the supply roller shaft, and a second electrical contact positioned closer to the developing roller shaft than the second agitator gear is to the developing roller shaft. The second electrical contact of the supply electrode is positioned farther from the developing roller shaft than the second electrical contact of the developing electrode is from the developing roller shaft.

Abstract: A developing cartridge may include: a casing; a first gear; and a second gear. The first gear may include: a small-diameter gear portion and a large-diameter gear portion. The second gear may include: a first columnar portion; a second columnar portion; a first engaging portion; a second engaging portion; and a protrusion. The first engaging portion may be provided at the first columnar portion and may be engageable with the small-diameter gear portion. The second engaging portion may be provided at the second columnar portion and positioned closer than the first engaging portion to the casing in the axials direction. The second engaging portion may be engageable with the large-diameter gear portion. The protrusion may be rotatable together with the first and second engaging portions. The second engaging portion may be engageable with the large-diameter gear portion after the first engaging portion has engaged with the small-diameter gear portion.

Abstract: A developer cartridge may include a gear configured to be movable between an engagement position in which the gear engages an auger or supply gear to provide toner from a toner container to a developing unit and a disengaged position in which the gear does not engage the auger or supply gear. The gear may be moved by a cam and/or cam gear from the engagement position to the disengaged position and vice versa. The cam gear may include toothless and toothed portions to allow the developer cartridge to maintain the movable gear in either the engagement position or the disengaged position. In some arrangements, an urging member such as a spring may bias the cam gear in a rotation direction, while a lever may provide a counteracting force when the movable gear is to be maintained in a particular position.

Abstract: A developer cartridge may include: a first gear having a small-diameter gear portion and a large-diameter gear portion; and a second gear including: a first columnar portion centered on a second axis; a second columnar portion having a smaller diameter than the first columnar portion; a first engagement portion extending along a portion of a peripheral surface of the first columnar portion and engageable with the small-diameter gear portion; a second engagement portion extending along a portion of a peripheral surface of the second columnar portion and positioned closer to a housing than the first engagement portion in an axial direction and engageable with the large-diameter gear portion; and a protruding portion protruding in the axial direction and rotatable together with the first engagement portion and the second engagement portion. The second engagement portion may engage the large-diameter gear portion after the first engagement portion engages the small-diameter gear portion.

Abstract: A developing cartridge includes a developing electrode and a supply electrode. The developing electrode includes a first electrical contact in contact with a developing roller shaft, and a second electrical contact positioned closer to the developing roller shaft than a second agitator gear is to the developing roller shaft. The second electrical contact is positioned farther from the developing roller shaft than the first electrical contact is from the developing roller shaft. The supply electrode includes a first electrical contact in contact with the supply roller shaft, and a second electrical contact positioned closer to the developing roller shaft than the second agitator gear is to the developing roller shaft. The second electrical contact of the supply electrode is positioned farther from the developing roller shaft than the second electrical contact of the developing electrode is from the developing roller shaft.

Abstract: A developing cartridge includes: a casing; a developer carrier; and a receiving member. The casing includes a support portion. The receiving member receives a drive force from an external drive source to transmit the drive force to the developer carrier. The receiving member has a cylindrical configuration. The support portion rotatably supports the receiving member. The receiving member includes: a receiving portion; a transmission portion; and a fitting portion. The receiving portion has an outer edge in a radial direction of the receiving member. The transmission portion defines an outer circumferential edge of the receiving member. The fitting portion is positioned inward of the transmission portion in the radial direction and fitted with the support portion. The outer edge of the receiving portion is positioned inward of the transmission portion in the radial direction and outward of the fitting portion in the radial direction.

Abstract: A developer cartridge may include: a first gear having a small-diameter gear portion and a large-diameter gear portion; and a second gear including: a first columnar portion centered on a second axis; a second columnar portion having a smaller diameter than the first columnar portion; a first engagement portion extending along a portion of a peripheral surface of the first columnar portion and engageable with the small-diameter gear portion; a second engagement portion extending along a portion of a peripheral surface of the second columnar portion and positioned closer to a housing than the first engagement portion in an axial direction and engageable with the large-diameter gear portion; and a protruding portion protruding in the axial direction and rotatable together with the first engagement portion and the second engagement portion. The second engagement portion may engage the large-diameter gear portion after the first engagement portion engages the small-diameter gear portion.

Abstract: In a developing cartridge, a drive-force receiving member includes: a first cylindrical part having a gear part transmitting drive force to a developing roller; a second cylindrical part disposed radially inward of the first cylindrical part and in contact with a support part; and a receiving part receiving drive force from outside of the developing cartridge. The receiving part is disposed outward of the first and second cylindrical parts in an axial direction in which a rotational axis extends. The receiving part has an internal space in communication with a gap between the first and second cylindrical parts. The receiving part is disposed to overlap the gap between the first and second cylindrical parts when the receiving part is viewed in the axial direction. The receiving part has an outward end in the axial direction, at least part of the outward end of the receiving part being closed.

Abstract: A developer cartridge includes a first gear having a first engagement part provided along a circumferential surface of the first gear, and a first trigger protruding from the circumferential surface. The developer cartridge also has a second gear having a small diameter gear part configured to be engaged to the first engagement part, a large diameter gear part rotatable together with the small diameter gear part, and a second trigger configured to contact and rotate the first gear. The large diameter gear part is configured to receive a driving force and rotate to move from a first position at which the large diameter gear part can rotate relative to the second trigger to a second position at which the large diameter gear part rotates together with the second trigger. The second trigger is configured to rotate together with the large diameter gear part to contact the first trigger.

Abstract: A developing cartridge includes first and second rotary members. The first rotary member is rotatable from a first position to a second position and from the second position to a third position, and includes a first gear part and a first rib. The first rib extends along an addendum circle of the first gear part. The second rotary member includes a second gear part and a second rib protruding outward in a radial direction of the second rotary member. The second rib is in contact the first rib during rotation of the first rotary member from the first position toward the second position. The second rib is separated from the first rib during rotation of the first rotary member from the second position toward the third position.

Abstract: A developer cartridge may include a gear configured to be movable between an engagement position in which the gear engages an auger or supply gear to provide toner from a toner container to a developing unit and a disengaged position in which the gear does not engage the auger or supply gear. The gear may be moved by a cam and/or cam gear from the engagement position to the disengaged position and vice versa. The cam gear may include toothless and toothed portions to allow the developer cartridge to maintain the movable gear in either the engagement position or the disengaged position. In some arrangements, an urging member such as a spring may bias the cam gear in a rotation direction, while a lever may provide a counteracting force when the movable gear is to be maintained in a particular position.