Abstract: A process cartridge includes a casing, a photosensitive drum having an axis L1, a drum flange, and a coupling member. The coupling member includes two coupling projections that extend in a direction away from the drum flange. The coupling is movable between a first position where a straight line between the projections passes through the axis L1 to a second position where the straight line between the projections does not pass through the axis L1.

Abstract: A drum unit usable in a process cartridge includes a photosensitive drum having an axis L1 and a coupling member having an axis L2. The coupling member includes a first end portion connected to the photosensitive drum and a second end portion, with the second end portion including at least one projection that is open to the axis L2 and an outer surface that faces away from the first end portion. For least part of the outer surface, a maximum distance from the axis L2 to the outer surface along a line perpendicular to the axis L2 decreases as the distance along the axis L2 from the first end portion increases.

Abstract: A process cartridge includes a casing, a photosensitive drum having an axis L1, and a coupling member having an axis L2. The coupling member includes (i) a first end portion connected with the photosensitive drum, (ii) a second end portion having an outermost surface, (iii) an axle portion connecting the first end portion and the second end portion to each other, and (iv) at least one projection extending from the second end portion. For at least part of the outermost surface of the second end portion, a maximum distance from the axis L2 to the outermost surface along a line perpendicular to the axis L2 increases as the distance along the axis L2 from the axle portion increases.

Abstract: An image forming apparatus comprises a cartridge that includes a developing roller and a coupling member for receiving a rotational force for rotating the developing roller. A cylindrical member movably supports one end portion of the coupling member inside of the cylindrical member. A cylindrical member side force receiving portion is provided inside the cylindrical member. A first regulating portion, provided inside of the cylindrical member, prevents one end portion of the coupling member from disengaging in an axial direction of the cylindrical member. A second regulating portion regulates deformations of the first regulating portion outward of the cylindrical member in the radial direction in a state in which one end portion of the coupling member is mounted to the inside of the cylindrical member. The apparatus also includes a driving motor and a driving shaft engageable with the coupling member of the cartridge.

Abstract: A cartridge is detachably mountable to a main assembly of an electrophotographic image forming apparatus. The cartridge includes coupling member that is provided for receiving a rotational force for rotating a developing roller, with a cylindrical member movably supporting one end portion of the coupling member inside of the cylindrical member, and a cylindrical member side force receiving portion being provided inside the cylindrical member for receiving the rotational force received by the coupling member. The cartridge further includes a first regulating portion for preventing one end portion of the coupling member from disengaging in an axial direction of the cylindrical member; and a second regulating portion for regulating deformation of the first regulating portion in a state in which one end portion of the coupling member is mounted to an inside of the cylindrical member with deformation of the first regulating portion.

Abstract: A process cartridge for use with a main assembly of an electrophotographic image forming apparatus, the main assembly including a driving shaft, to be driven by a motor, having a rotational force applying portion, wherein the process cartridge is dismountable from the main assembly in a direction substantially perpendicular to an axial direction of the driving shaft, the process cartridge includes i) an electrophotographic photosensitive drum having a photosensitive layer at a peripheral surface thereof, the electrophotographic photosensitive drum being rotatable about an axis thereof; ii) process means actable on the electrophotographic photosensitive drum; iii) a coupling member engageable with the rotational force applying portion to receive a rotational force for rotating the electrophotographic photosensitive drum, the coupling member being capable of taking a rotational force transmitting angular position for transmitting the rotational force for rotating the electrophotographic photosensitive drum to t

Abstract: An image forming apparatus comprises a cartridge that includes a developing roller and a coupling member for receiving a rotational force for rotating the developing roller. A cylindrical member movably supports one end portion of the coupling member inside of the cylindrical member. A cylindrical member side force receiving portion is provided inside the cylindrical member. A first regulating portion, provided inside of the cylindrical member, prevents one end portion of the coupling member from disengaging in an axial direction of the cylindrical member. A second regulating portion regulates deformations of the first regulating portion outward of the cylindrical member in the radial direction in a state in which one end portion of the coupling member is mounted to the inside of the cylindrical member. The apparatus also includes a driving motor and a driving shaft engageable with the coupling member of the cartridge.

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 for use with a main assembly of an electrophotographic image forming apparatus. The process cartridge includes a casing, a photosensitive drum having an axis L1, and a coupling member having an axis L2. The coupling member is movable between a first position in which the axis L2 of the coupling member is coaxial with the axis L1 of the photosensitive drum, and a second position in which the axis L2 of the coupling member is inclined with respect to the axis L1 of the photosensitive drum.

Abstract: A cartridge is detachably mountable to a main assembly of an electrophotographic image forming apparatus. The cartridge includes coupling member that is provided for receiving a rotational force for rotating a developing roller, with a cylindrical member movably supporting one end portion of the coupling member inside of the cylindrical member, and a cylindrical member side force receiving portion being provided inside the cylindrical member for receiving the rotational force received by the coupling member. The cartridge further includes a first regulating portion for preventing one end portion of the coupling member from disengaging in an axial direction of the cylindrical member; and a second regulating portion for regulating deformation of the first regulating portion in a state in which one end portion of the coupling member is mounted to an inside of the cylindrical member with deformation of the first regulating portion.

Abstract: A rotating force transmitting part for an electrophotographic photosensitive drum for a main assembly of the electrophotographic image forming apparatus, wherein the main assembly of the electrophotographic image forming apparatus includes a driving shaft, to be driven by a motor, having the rotating force applying portion, and wherein the electrophotographic photosensitive drum is dismountable from the main assembly of the electrophotographic image forming apparatus in a direction substantial perpendicular with an axial direction of the driving shaft, the rotating force transmitting part includes a coupling member engageable with the rotational force applying portion to receive a rotational force for rotating the electrophotographic photosensitive drum in the state in which electrophotographic photosensitive drum is mounted to the main assembly of the electrophotographic image forming apparatus, wherein the coupling member being capable of taking a rotational force transmitting angular position for transmitt

Abstract: A rotating force transmitting part for an electrophotographic photosensitive drum for a main assembly of the electrophotographic image forming apparatus. The rotating force transmitting part includes a coupling member engageable with the rotational force applying portion to receive a rotational force for rotating the electrophotographic photosensitive drum in the state in which electrophotographic photosensitive drum is mounted to the main assembly of the electrophotographic image forming apparatus, wherein the coupling member being capable of taking a rotational force transmitting angular position for transmitting the rotational force for rotating the electrophotographic photosensitive drum to the electrophotographic photosensitive drum and a disengaging angular position in which the coupling member is inclined away from the axis of the electrophotographic photosensitive drum from the rotational force transmitting angular position.

Abstract: A developing device is usable with an electrophotographic image forming apparatus including a shaft and a rotary unit mounting the device. When mounted, the device is movable perpendicular to a shaft axial direction in response to movement of the rotary unit and the shaft is not movable in that direction. The device includes a developing roller that contacts and separates from a drum in response to movement of the rotary unit, and a coupler transmitting a rotating force to the roller. The coupler includes a portion engaging the shaft to receive a rotating force and a portion transmitting the received rotating force to the roller. The coupler takes a first position for transmitting the rotational force to the roller, a position before the coupler engages the shaft and is inclined away from the first position, and a position for the disengagement of the coupler and the shaft.

Abstract: A cover member is mounted on a cartridge including a developer bearing member for providing a developer for developing an electrostatic latent image, and a grip portion to be gripped, and cover an exposed part of the developer bearing member exposed outside a frame member of the cartridge includes a portion configured to partition a space between the grip portion and the exposed part when the cover member is mounted on the cartridge.

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 includes a casing, a photosensitive drum having an axis L1, the photosensitive drum being rotatably supported in the casing to permit rotation about the axis L1, and a coupling member having an axis L2, with the coupling member including (i) a first end portion connected to the photosensitive drum, (ii) a second end portion, and (iii) a connecting portion connecting the first end portion and the second end portion. The second end portion includes at least one pair of projections, with each of the projections including a facing portion that faces the axis L2, each facing portion being open to the axis L2. A diameter of an imaginary circle that is tangent to the facing portions of the projections is greater than a maximum dimension of the connecting portion in a direction perpendicular to the axis L2.

Abstract: An image forming apparatus cartridge includes a casing and a developer roller having an axis L1, with the developer roller being rotatably supported in the casing to permit rotation about the axis L1. The cartridge also includes a first gear connected to the developer roller and a second gear in meshing engagement with the first gear. The cartridge further includes a coupling member having an axis L2, with the coupling member having (i) a first end portion connected to the second gear and operatively connected with the developer roller so as to be capable of transmitting a rotational force to the developer roller via the first and second gears, (ii) a second end portion having a recess formed therein and including at least two projections provided at diametrically opposed positions, and (iii) a connecting portion connecting the first end portion and the second end portion.

Abstract: An electrophotographic photosensitive drum unit includes (a) a cylinder having a photosensitive layer at an outer periphery thereof and (b) a drum flange provided at one end of the cylinder, with the drum flange including at least two projections provided inside of the drum flange and projected radially inwardly of the drum flange, and with a space diametrically between the two projections. Each of the two projections projects radially inwardly of the drum flange to a greater extent at a position farther from the cylinder than it does at a position closer to the cylinder.

Abstract: A process cartridge includes a casing, a photosensitive drum having an axis L1, the photosensitive drum being rotatably supported in the casing to permit rotation about the axis L1, and a coupling member having an axis L2, with the coupling member including (i) a first end portion connected to the photosensitive drum, (ii) a second end portion, and (iii) a connecting portion connecting the first end portion and the second end portion. The second end portion includes at least one pair of projections, with each of the projections including a facing portion that faces the axis L2, each facing portion being open to the axis L2. A diameter of an imaginary circle that is tangent to the facing portions of the projections is greater than a maximum dimension of the connecting portion in a direction perpendicular to the axis L2.

Abstract: An electrophotographic photosensitive drum unit includes (a) a cylinder having a photosensitive layer at an outer periphery thereof and (b) a drum flange provided at one end of the cylinder, with the drum flange including at least two projections provided inside of the drum flange and projected radially inwardly of the drum flange, and with a space diametrically between the two projections. Each of the two projections projects radially inwardly of the drum flange to a greater extent at a position farther from the cylinder than it does at a position closer to the cylinder.