摘要:
A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, wherein said main assembly includes a motor, a main assembly side gear for receiving driving force from said motor and a hole defined by twisted surfaces, said hole being substantially coaxial with said gear, said process cartridge includes an electrophotographic photosensitive drum; process means actable on said photosensitive drum; a projection engageable with said twisted surfaces, said projection being provided at a longitudinal end of said photosensitive drum, wherein said projection is non-twisted, and when said main assembly side gear rotates with said hole and projection engaged with each other, rotational driving force is transmitted from said gear to said photosensitive drum through engagement between said hole and said projection; and a resilient member for urging said process cartridge in a longitudinal direction of said photosensitive drum when said process cartridge is mounted to the main assembly.
摘要:
A bearing member for a cartridge frame of a process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, wherein the process cartridge includes an electrophotographic photosensitive drum and process means actable on the electrophotographic photosensitive drum, the bearing member includes a bearing portion for rotatably supporting a shaft provided at an end of the electrophotographic photosensitive drum; a protection portion formed along a circumference of a driving force receptor portion projected outwardly at an end of the shaft, wherein the driving force receptor portion being in the form of a male coupling projection engageable with a female coupling recess provided in a main assembly of the apparatus to receive driving force from the main assembly when the process cartridge is mounted to the main assembly; a locking portion for mounting the bearing member to the cartridge frame.
摘要:
A process cartridge detachably mountable on the main body of an electrophotographic image forming apparatus comprises an electrophotographic photosensitive member, development means for developing the latent images formed by the electrophotographic photosensitive member, and a toner retaining unit for retaining toner to be used for development by the development means. This toner retaining unit is formed by coupling a first frame having a toner container for containing toner, a toner supply opening for supplying toner contained in the toner container to the development means, and an installation surface for a covering member arranged on the circumference of a second opening provided apart from the toner supply opening, and a second frame having a covering member installed on the covering member installation surface for closing the toner container in order to cover the second opening substantially in parallel with the covering member installation surface, and a handling unit arranged for the covering member and extruded to the side opposite to the covering member installation surface of the covering member.
摘要:
A process cartridge detachably mountable to a main body of an electrophotographic image forming apparatus includes a cartridge frame, an electrophotographic photosensitive member supported by the cartridge frame, a process device supported by the cartridge frame to act on the electrophotographic photosensitive member, and a shutter member for protecting a portion of the electrophotographic photosensitive member exposed from the cartridge frame. It further includes a first connection member to connect the cartridge frame and the shutter member. The first connection member is rotatable with respect to the cartridge frame and is detachably attached to the cartridge frame. Also provided is a second connection member to connect the cartridge frame and the shutter member. It is rotatable with respect to the cartridge frame and is attached to the cartridge frame while regulating an axial movement of the second connection member during rotation of the second connection member.
摘要:
A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, wherein said main assembly includes a motor, a main assembly side gear for receiving driving force from said motor and a hole defined by twisted surfaces, said hole being substantially coaxial with said gear, said process cartridge includes an electrophotographic photosensitive drum; process means actable on said photosensitive drum; a projection engageable with said twisted surfaces, said projection being provided at a longitudinal end of said photosensitive drum, wherein said projection is non-twisted, and when said main assembly side gear rotates with said hole and projection engaged with each other, rotational driving force is transmitted from said gear to said photosensitive drum through engagement between said hole and said projection; and a resilient member for urging said process cartridge in a longitudinal direction of said photosensitive drum when said process cartridge is mounted to the main assembly.
摘要:
An assembling method of a process cartridge detachably mountable to an image forming apparatus includes providing a drum frame, supporting an photosensitive drum and having first and second engaging portions above the electrophotographic photosensitive drum, one adjacent each longitudinal end of the electrophotographic photosensitive drum; and providing a developing device frame supporting a developer, and having first and second compression springs above the developer, one adjacent each longitudinal end of the developer, and first and second projected portions projected in a direction crossing with a longitudinal direction of the developer, one adjacent each longitudinal end of the developer. The first and second projected portions are engaged with the first and second engaging portions, respectively. A first penetrating member is penetrated through a first opening formed in the first projected portion and a third opening formed in the first engaging portion, and a second penetrating member is penetrated through a second opening formed in the second projected portion and a fourth opening formed in the second engaging portion, while the projected portions and the engaging portions are engaged with each other.
摘要:
The present invention provides a process cartridge removably mounted to an electrophotographic image forming apparatus. The process cartridge includes; a cartridge frame, an electrophotographic photosensitive member provided within the cartridge frame, a process device for acting on the electrophotographic photosensitive member, a memory device for storing information to be transmitted to the electrophotographic image forming apparatus, a positioning portion for positioning the cartridge frame with respect to the image forming apparatus when the process cartridge is mounted to the image forming apparatus, and an exposure opening provided in the cartridge frame and to pass information light from the image forming apparatus to be illuminated on the electrophotographic photosensitive member when the process cartridge is mounted to the image forming apparatus.
摘要:
A coupling pin for coupling a first frame and a second frame of a process cartridge detachably mountable relative to a main assembly of an electrophotographic image forming apparatus includes (a) a first shaft portion for being press-fitted into a first hole formed in the first frame; and (b) a second shaft portion for being press-fitted into a second hole formed in the first frame, where the second shaft portion is upstream of the first shaft portion in a direction of press-fitting of the coupling pin. The second shaft portion has an outer diameter which is larger than that of the first shaft portion. The pin further includes (c) a third shaft portion for being loosely fitted into a hole formed in the second frame with a gap between the third shaft portion and inside surface of the hole of the second shaft.
摘要:
A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, wherein the main assembly includes a motor, a main assembly side gear for receiving driving force from the motor, a main assembly positioning member, a hole which is substantially coaxial with the gear, and a process cartridge mounting portion for mounting the process cartridge, the process cartridge includes an electrophotographic photosensitive drum; process mechanism(s) actable on the photosensitive drum; and a projection engageable with the hole, the projection being provided at a longitudinal end of the photosensitive drum; wherein when the main assembly side gear rotates with the hole and projection engaged with each other, the rotational driving force is transmitted from the gear to the photosensitive drum through engagement between the hole and the projection; a cartridge positioning portion for abutting to the main assembly positioning portion to stop a movement of the process cartridge beyond a predetermined distance in a direction substantially perpendicular to an axis of the photosensitive drum, when the process cartridge is mounted to the cartridge mounting portion, and the photosensitive drum receives the rotation driving force through the hole and the projection.
摘要:
An end cover for a process cartridge detachably mountable to an electrophotographic image forming apparatus for forming an image on a recording material, includes a base; a gear train including a plurality of gears mounted on the base; a first opening, provided in the base so as to be opposed to a gear of the gear train, for permitting the gear of the gear train to be rotated externally when the end cover is mounted to a cartridge frame in assembling of the process cartridge; a second opening, provided opposed to the cartridge gear, for permitting observation of rotation of the cartridge gear provided in the cartridge frame which cartridge gear receives driving force through the gear train when the gear opposed to the first opening is rotated.