A photo interrupter unit includes a photo interrupter and a supporting portion configured to support the photo interrupter detachably. The photo interrupter includes a light emitting portion configured to emit light, a photo sensing portion configured to receive the light emitted from the light emitting portion, and a claw portion configured to be elastically deformable. The supporting portion includes a mounting surface on which the photo interrupter is mounted, a hole portion defining a hole into which the claw portion is inserted, provided in the mounting surface and configured to engage with the claw portion, and a projection projecting from the mounting surface, and configured to regulate a position of the photo interrupter in a deforming direction in which the claw portion is elastically deformable in a state where the claw portion and the hole portion are engaged.

To provide a structure that includes a small number of components, that is unlikely to be affected by heat, and that allows a blade secured to a frame body and a rotating member to be in contact with each other at a uniform pressure in a longitudinal direction.

A structure includes a rotatable rotating member, a blade, a support member, and a frame body. The blade extends in an axial direction of the rotating member and is in contact with or disposed close to a surface of the rotating member. The support member supports the blade such that one end side of the blade projects toward the rotating member in a lateral direction that intersects the axial direction. The frame body is formed by insert molding in which resin is injected while the support member is secured to a mold. The frame body clamps part of the support member so as to support the support member.

A replaceable unit for an electrophotographic image forming device according to one embodiment includes a pocket formed on a first side of a housing. A bottom end of the pocket is open for receiving an electrical connector during insertion of the replaceable unit into the image forming device. An electrical contact is positioned within the pocket and is electrically connected to processing circuitry on the housing. An outer guide is positioned on the first side of the housing and below the pocket. A portion of the outer guide inclines inward toward the first side of the housing as the outer guide extends upward. An inner guide is positioned within the pocket on a first inner surface of the pocket, which faces toward the first side of the housing. A portion of the inner guide inclines inward toward the first side of the housing as the inner guide extends upward.

A replaceable imaging basket for an electrophotographic image forming device according to one embodiment includes a frame having a positioning slot that is open at a top of the frame for receiving a replaceable unit. An electrical connector is positioned on an inner side of the frame adjacent to the positioning slot. The electrical connector includes an electrical contact on a front of the electrical connector that faces the positioning slot. The electrical connector includes a pair of outer guides and a pair of inner guides on opposite sides of the electrical contact. The inner guides are spaced inward from the outer guides. A top portion of a front surface of each of the outer guides tapers rearward away from the positioning slot as they extend upward. A top portion of a rear surface of each of the inner guides tapers forward toward the positioning slot as they extend upward.

A flange member includes a first cylindrical portion, a second cylindrical portion disposed inside the first cylindrical portion coaxially with the first cylindrical portion, an inwardly protruding portion protruding from an inner circumference of the second cylindrical portion, a first wall extending in the central axis direction and connecting the first cylindrical portion and the second cylindrical portion together and is in contact with a shaft member between the first wall and the second wall to receive a driving force, a second wall opposed to the first wall, and a connecting portion connecting the first cylindrical portion and the second cylindrical portion and connecting the first wall and the second wall. A groove is provided inside the first cylindrical portion and outside the second cylindrical portion. The connecting portion is disposed adjacent to the inwardly protruding portion with respect to the shaft member in the central axis direction.

A developer accommodating container includes first and second members, and first and second seals. The first member includes one end portion and the other end portion in a first direction. At least a part of the one end portion of the first seal is nipped between the first member and the second member in a state of being superposed on the second seal. The one end portion of the first seal includes first, second, third, and fourth ridge lines. At least one of a first corner formed by the first ridge line and the second ridge line and a second corner formed by the third ridge line and the fourth ridge line is nipped between the first member and the second member so as to be elastically deformed in a state of being superposed on the second seal.

An electrophotographic apparatus including: an electrophotographic photosensitive member; a developing unit, which includes a toner, and which is configured to develop an electrostatic latent image with the toner to form a toner image on a surface of the electrophotographic photosensitive member; and a cleaning unit configured to remove a residual toner remaining on the surface of the electrophotographic photosensitive member after the toner image is transferred from the surface of the electrophotographic photosensitive member onto a transfer material, wherein the surface of the electrophotographic photosensitive member is formed of amorphous silicon carbide, wherein a Si atom density in a region in the vicinity of the surface of the electrophotographic photosensitive member from the surface to a depth of 100 nm is 1.010.sup.22 atoms/cm.sup.3 or less, and wherein the toner contains a toner particle that contains a polyester resin having a polyethylene terephthalate segment and an inorganic fine particle.

A drum unit, detachably installed in a main assembly of an image forming device, includes a photosensitive drum and a coupling. The main assembly includes a drum drive transmission unit that includes a driving force transmission member, a first braking force engagement member, and a second braking force engagement member. The first and second braking force engagement members are disposed in the driving force transmission member. The driving force transmission member includes a cylindrical part, a driving force transmission part and a positioning boss. The coupling is coaxially disposed at one end of the photosensitive drum, and includes a middle accommodation member and a sleeve. The sleeve is provided with a driving force accommodation member, where the driving force accommodation member is able to be engaged with the driving force transmission member to transmit power received from the driving force transmission member to the photosensitive drum.

An example process cartridge includes a developing unit, a photosensitive unit, and a hinge to connect the developing unit to the photosensitive unit to be pivotable between a direction in which a developing roller approaches a photosensitive drum and a direction in which the developing roller separates from the photosensitive drum. The hinge includes a driving-side hinge to connect driving ends of the photosensitive unit and the developing unit to be pivotable. The driving-side hinge has a spacing.

An example process cartridge includes a developing unit, a photosensitive unit, and a hinge to connect the developing unit to the photosensitive unit to be pivotable between a direction in which a developing roller approaches a photosensitive drum and a direction in which the developing roller separates from the photosensitive drum. The hinge includes a driving-side hinge to connect driving ends of the photosensitive unit and the developing unit to be pivotable. The driving-side hinge has a spacing.