Abstract: A technique enabling downsizing of an image forming apparatus is provided. A cleaning unit 13 attachable to and detachable from an apparatus main body of an image forming apparatus 100 that forms an image on a recording material 12 is provided, with this cleaning unit 13 including: a photosensitive drum 1; and a cleaning frame body 14 that supports the photosensitive drum 1 and that includes an opening 14c through which laser light 3c for exposing the photosensitive drum 1 can pass, wherein the opening 14c is configured such that a width of the opening 14c in a scanning direction in an irradiation range of the light for exposing the photosensitive drum 1 becomes greater toward a side of the photosensitive drum 1 from a side of a light source of light for exposing the photosensitive drum 1.

Abstract: A process cartridge, a combination of a process cartridge and a drive shaft of an electrophotographic image forming apparatus, and a method of mounting and using a process cartridge in an electrophotographic image forming apparatus include a feature wherein a coupling member of the process cartridge can take different angular positions relative to the drive shaft's fixed axis of rotation. In one position, an axis of the coupling member is inclined relative to the drive shaft's fixed axis of rotation. In a second position, the axis of the coupling member is substantially coaxial with the drive shaft's fixed axis of rotation.

Abstract: A cartridge for use with a main assembly of an electrophotographic image forming apparatus, the main assembly including a driving shaft having a rotational force applying portion, wherein the cartridge is dismountable from the main assembly in a direction substantially perpendicular to an axial direction of the driving shaft, the cartridge including i) a developing roller for developing an electrostatic latent image formed on an electrophotographic photosensitive drum, the developing roller being rotatable about an axis thereof; and ii) a coupling member engageable with the rotational force applying portion to receive a rotational force for rotating the developing roller, the coupling member being capable of taking a rotational force transmitting angular position for transmitting the rotational force for rotating the developing roller to the developing roller and a disengaging angular position in which the coupling member is inclined away from the rotational force transmitting angular position, wherein when t

Abstract: A cartridge includes a photosensitive member, a discharge opening for discharging a developer removed from the photosensitive member, toward a loosening member provided in the main assembly of a apparatus; a vibration imparting member for imparting vibration to the loosening member. The vibration imparting member is movable between a first position for imparting the vibration to the loosening member and a second position retracted from the first position.

Abstract: A cartridge includes a coupling member for receiving a rotational force for rotating a developing roller. The cartridge also includes a cylinder including an accommodating portion accommodating at least a part of the coupling member, the cylinder being configured to transmit the rotational force from the coupling member to the developing roller. The cartridge further includes a frame including a bearing configured to rotatably support the cylinder and a regulating wall capable of regulating movement of the coupling member by contacting the coupling member. The bearing encompasses the regulating wall as seen along a rotational axis of the cylinder.

Abstract: A process cartridge, a combination of a process cartridge and a drive shaft of an electrophotographic image forming apparatus, and a method of mounting and using a process cartridge in an electrophotographic image forming apparatus include a feature wherein a coupling member of the process cartridge can take different angular positions relative to the drive shaft's fixed axis of rotation. In one position, an axis of the coupling member is inclined relative to the drive shaft's fixed axis of rotation. In a second position, the axis of the coupling member is substantially coaxial with the drive shaft's fixed axis of rotation.

Abstract: A developing device usable with an electrophotographic image forming apparatus, the apparatus including a driving shaft rotatable by a motor and having a rotating force applying portion, and a movable member, the developing device being mountable to the movable member, and the developing device being movable in a direction substantially perpendicular to an axial direction of the driving shaft in response to movement of the movable member in one direction with the developing device mounted to the movable member, the developing device includes i) a developing roller for developing an electrostatic latent image formed on an electrophotographic photosensitive drum, the developing roller being rotatable about an axis; and ii) a coupling member for transmitting a rotating force to the developing roller, the coupling member including, a rotating force receiving portion engageable with the rotating force applying portion to receive a rotating force from the driving shaft, and a rotating force transmitting portion for

Abstract: A process cartridge, combination of a process cartridge and a drive shaft of an electrophotographic image forming apparatus, and a method of mounting and using a process cartridge in an electrophotographic image forming apparatus include a feature that a coupling member of the process cartridge can take different angular positions relative to the fixed axis of rotation of the drive shaft. In one position, the axis of the coupling member is inclined relative to the drive shaft's fixed axis of rotation. In another position, the axis of the coupling member is substantially coaxial with the drive shaft's fixed axis of rotation.

Abstract: A technique enabling downsizing of an image forming apparatus is provided. A cleaning unit 13 attachable to and detachable from an apparatus main body of an image forming apparatus 100 that forms an image on a recording material 12 is provided, with this cleaning unit 13 including: a photosensitive drum 1; and a cleaning frame body 14 that supports the photosensitive drum 1 and that includes an opening 14c through which laser light 3c for exposing the photosensitive drum 1 can pass, wherein the opening 14c is configured such that a width of the opening 14c in a scanning direction in an irradiation range of the light for exposing the photosensitive drum 1 becomes greater toward a side of the photosensitive drum 1 from a side of a light source of light for exposing the photosensitive drum 1.

Abstract: A cartridge for use with a main assembly of an electrophotographic image forming apparatus, the main assembly including a driving shaft having a rotational force applying portion, wherein the cartridge is dismountable from the main assembly in a direction substantially perpendicular to an axial direction of the driving shaft, the cartridge including i) a developing roller for developing an electrostatic latent image formed on an electrophotographic photosensitive drum, the developing roller being rotatable about an axis thereof; and ii) a coupling member engageable with the rotational force applying portion to receive a rotational force for rotating the developing roller, the coupling member being capable of taking a rotational force transmitting angular position for transmitting the rotational force for rotating the developing roller to the developing roller and a disengaging angular position in which the coupling member is inclined away from the rotational force transmitting angular position, wherein when t

Abstract: A cartridge detachably mountable to a main assembly of an image forming apparatus includes a photosensitive drum; a discharging path for permitting movement of a developer removed from the drum, the discharging path including a developer discharge opening and a movable portion through which the developer is movable and which is movable between a retracted position in an upstream side with respect to a developer moving direction through the discharge opening and a advanced position in a downstream side with respect to the developer moving direction; and a sealing portion for closing the discharging path by contacting the movable portion at a position different from that of the discharge opening.

Abstract: A cartridge includes a photosensitive member, a discharge opening for discharging a developer removed from the photosensitive member, toward a loosening member provided in the main assembly of a apparatus; a vibration imparting member for imparting vibration to the loosening member. The vibration imparting member is movable between a first position for imparting the vibration to the loosening member and a second position retracted from the first position.

Abstract: An image forming apparatus includes a process cartridge. The process cartridge includes a coupling member having a first end portion, a second end portion, and a connecting portion connecting the first end portion and the second end portion. The second end portion of the coupling member includes at least one pair of projections, with each of the projections includinga facing portion that faces the axis L2, each facing portion being open to the axis L2. A maximum dimension in a direction perpendicular to the axis L2 of at least a part of the connecting portion is smaller than a diameter of an imaginary circle that is tangent to the facing portions of the projections.

Abstract: A cartridge includes a rotatable member, a coupling member for receiving a rotational force for rotating the rotatable member, and a cylindrical member movably supporting one end portion of the coupling member. A first regulating portion is provided inside of the cylindrical member for preventing the end portion of the coupling member from disengaging in an axial direction of the cylindrical member, with the first regulating portion being capable of deformation to allow the one end portion of the coupling member to disengage in the axial direction of the cylindrical member. A second regulating portion is provided for regulating the deformation of the first regulating portion in a state in which the end portion of the coupling member is mounted to the inside of the cylindrical member.

Abstract: A process cartridge includes a casing and developer contained within the casing. The process cartridge also includes a photosensitive drum having an axis L1, with the photosensitive drum being rotatably supported in the casing to permit rotation about the axis L1, and a developing roller having an axis L1?, with the developing roller being configured to develop a latent image formed on the photosensitive drum with the developer, and with the developing roller being rotatably supported in the casing to permit rotation about the axis L1?. A coupling member is operatively connected to the photosensitive drum, the coupling member including a body having an axis L2, and the coupling member including at least one projection provided at an end of the body.

Abstract: A process cartridge includes a photosensitive drum and a coupling member operatively connected to the photosensitive drum. The coupling member is movable between a position in which an axis of the coupling member is substantially coaxial with an axis of the photosensitive drum and a position in which the axis of the coupling member is not substantially coaxial with the axis of the photosensitive drum.

Abstract: A developing device usable with an electrophotographic image forming apparatus, the apparatus including a driving shaft rotatable by a motor and having a rotating force applying portion, and a movable member, the developing device being mountable to the movable member, and the developing device being movable in a direction substantially perpendicular to an axial direction of the driving shaft in response to movement of the movable member in one direction with the developing device mounted to the movable member, the developing device includes i) a developing roller for developing an electrostatic latent image formed on an electrophotographic photosensitive drum, the developing roller being rotatable about an axis; and ii) a coupling member for transmitting a rotating force to the developing roller, the coupling member including, a rotating force receiving portion engageable with the rotating force applying portion to receive a rotating force from the driving shaft, and a rotating force transmitting portion for

Abstract: A developing device usable with an electrophotographic image forming apparatus, the apparatus including a driving shaft rotatable by a motor and having a rotating force applying portion, and a movable member, the developing device being mountable to the movable member, and the developing device being movable in a direction substantially perpendicular to an axial direction of the driving shaft in response to movement of the movable member in one direction with the developing device mounted to the movable member, the developing device includes i) a developing roller for developing an electrostatic latent image formed on an electrophotographic photosensitive drum, the developing roller being rotatable about an axis; and ii) a coupling member for transmitting a rotating force to the developing roller, the coupling member including, a rotating force receiving portion engageable with the rotating force applying portion to receive a rotating force from the driving shaft, and a rotating force transmitting portion for

Abstract: A developing device usable with an electrophotographic image forming apparatus, the apparatus including a driving shaft rotatable by a motor and having a rotating force applying portion, and a movable member, the developing device being mountable to the movable member, and the developing device being movable in a direction substantially perpendicular to an axial direction of the driving shaft in response to movement of the movable member in one direction with the developing device mounted to the movable member, the developing device includes i) a developing roller for developing an electrostatic latent image formed on an electrophotographic photosensitive drum, the developing roller being rotatable about an axis; and ii) a coupling member for transmitting a rotating force to the developing roller, the coupling member including, a rotating force receiving portion engageable with the rotating force applying portion to receive a rotating force from the driving shaft, and a rotating force transmitting portion for

Abstract: A developing device that is useable with an electrophotographic image forming apparatus includes a developing roller for developing an electrostatic latent image formed on an electrophotographic photosensitive drum. The developing device also includes a coupling member for transmitting a rotating force to the developing roller.