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.

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 developer cartridge may include a gear configured to be movable between an enagement 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: 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 fixing device includes a frame, a first fixing member, a second fixing member, a first conducting member, and a second conducting member. The second fixing member includes a belt configured to form a nip region. The first fixing member is positioned at a first side and the second fixing member is positioned at a second side opposite to the first side. The first conducting member includes a first contacting portion exposed to an outside from the frame, and a first connecting portion electrically connecting the first fixing member and the first contacting portion. The second conducting member includes a second contacting portion exposed to an outside from the frame, and a second connecting portion electrically connecting the second fixing member and the second contacting portion. Both of the first contacting portion and the second contacting portion are positioned at one of the first side and the second side.

Abstract: A cartridge includes a housing, a drive-transmission member and a detected body. The housing has a first wall and a second wall opposing each other in a first direction from the second wall toward the first wall. The drive-transmission member is rotatable about a first axis parallel to the first direction for transmitting a drive force. The detected body is rotatable about a second axis parallel to the first axis upon receipt of the drive force to move the detected body irreversibly from a first position to a second position. The detected body includes: a detected portion; a receiving portion configured to receive the drive force; and a peripheral portion positioned downstream of the receiving portion in a radial direction of the detected body away from the second axis, at least a portion of the detected portion being positioned on the peripheral portion.

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 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: an agitation member configured to be rotatable around a rotational shaft extending in a first direction and to agitate a developer; an agitation gear being fixed to the agitation member and including a first gear configured to receive driving force to be inputted and a second gear positioned on one side of the first gear in the first direction; a detection target unit including a detection target receiving portion configured to receive the driving force from the second gear and a detection target portion configured to be detected by an external detecting apparatus; and a gear cover configured to cover at least a part of the agitation gear and the detection target unit therewith. The detection target portion is configured to move between the second gear and the gear cover when being projected in a direction orthogonal to the first direction.

Abstract: A developer cartridge including 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, and 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, wherein the large diameter gear part is configured to receive a driving force and rotate to thus 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, and wherein the second trigger is configured to rotate together with the large diameter gear part to thus contact the first trigger.

Abstract: A cartridge includes a housing, an agitator, a first rotary member having a detected portion and a first abutment portion, and a second rotary member having a second abutment portion. The agitator includes: a rotation shaft having an axial end portion at which the second rotary member is supported; and an agitation blade supported to the rotation shaft and resiliently deformable. The second rotary member is configured such that while the agitation blade is being spaced apart from the housing, the second abutment portion contacts the first abutment portion in accordance with rotation of the second rotary member to move the first rotary member from the first position to the second position, thereby transmitting the driving force from the second rotary member to the first rotary member.

Abstract: An image forming apparatus includes an apparatus main body and a cartridge configured to be mounted to and detached from the apparatus main body. The cartridge includes a rotating member which is configured to rotate and comprises a detected portion and a first engaging portion. The apparatus main body includes a detecting portion configured to detect the detected portion and a second engaging portion configured to engage with the first engaging portion. At least when the detecting portion detects the detected portion, the first engaging portion and the second engaging portion are engaged with each other by rotation of the rotating member.

Abstract: A cartridge includes a housing having a first wall and a second wall opposing each other, a drive-transmission member and a detected body rotatable about a first axis and a second axis respectively parallel to a first direction from the second wall toward the first wall. The detected body having a detected portion is movable first in the first direction and then in a second direction opposite to the first direction relative to the first wall while irreversibly moving from a first position to a second position, a distance between the detected portion and the first wall in the first direction being longer at the second position than at the first position. The drive-transmission member includes a first engaging portion engageable with the detected body at the first position and positioned upstream of an abutment portion abuttable with a receiving portion of the detected body in the first direction.

Abstract: A developer cartridge includes: a first rotary body having at least one detected part; and a second rotary body. The first rotary body is configured to rotate between a first position, in which a transmission part is disposed opposite the second rotary body, and a second position, in which a non-transmission part is disposed opposite the second rotary body. The first rotary body includes a contacted part. A photosensitive body cartridge includes a moving member. When the moving member is in a third position, the moving member contacts the contacted part of the first rotary body disposed in the second position, causing the first rotary body to rotate to the first position. Thereafter, in association with rotation of the first rotary body, the moving member moves to a fourth position, in which the moving member is unable to contact the contacted part.

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 developing device includes: an agitation member including an agitation film; and a housing including a first frame and a second frame jointed to the first frame. The second frame includes: a first contact part configured to contact the agitation film, and a second contact part configured to contact the agitation film, arranged at a downstream side of the first contact part, the second contact part protruding towards the first frame. A first distance from the rotational axis line to the first contact part, as seen from a direction of the rotational axis line, is gradually increased towards a downstream side with respect to the rotating direction. A second distance from the rotational axis line to the second contact part is equal to or greater than a maximum distance from the rotational axis line to the first contact part.

Abstract: A fixing device includes a frame, a first fixing member, a second fixing member, a first conducting member, and a second conducting member. The second fixing member includes a belt configured to form a nip region. The first fixing member is positioned at a first side and the second fixing member is positioned at a second side opposite to the first side. The first conducting member includes a first contacting portion exposed to an outside from the frame, and a first connecting portion electrically connecting the first fixing member and the first contacting portion. The second conducting member includes a second contacting portion exposed to an outside from the frame, and a second connecting portion electrically connecting the second fixing member and the second contacting portion. Both of the first contacting portion and the second contacting portion are positioned at one of the first side and the second side.

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: 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.