摘要:
An image forming apparatus includes a development device including a development roller and a driving force receiving member, a movable member configured to move the development device between a development position and a retracting position, a first driving force transmission member configured to transmit a driving force to the movable member, a second driving force transmission member configured to engage with the driving force receiving member and transmit the driving force to the driving force receiving member, and a controller configured to perform drive control for the first driving force transmission member based on a temperature detected by a sensor. If α1 represents acceleration of the development device in a case where the temperature is T1 and the driving force receiving member disengages from the second driving force transmission member and α2 represents acceleration of the development device in a case where the temperature is T2 and the driving force receiving member disengages from the second driving force transmission member, the controller performs the drive control for the first driving force transmission member so as to satisfy a relationship α1≦α2 when T1≦T2.
摘要:
An image forming apparatus includes a development device including a development roller and a driving force receiving member, a movable member configured to move the development device between a development position and a retracting position, a first driving force transmission member configured to transmit a driving force to the movable member, a second driving force transmission member configured to engage with the driving force receiving member and transmit the driving force to the driving force receiving member, and a controller configured to perform drive control for the first driving force transmission member based on a temperature detected by a sensor. If α1 represents acceleration of the development device in a case where the temperature is T1 and the driving force receiving member disengages from the second driving force transmission member and α2 represents acceleration of the development device in a case where the temperature is T2 and the driving force receiving member disengages from the second driving force transmission member, the controller performs the drive control for the first driving force transmission member so as to satisfy a relationship α1≦α2 when T1≦T2.
摘要:
A cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, includes a developer accommodating portion for accommodating a developer; a developing roller for developing an electrostatic latent image formed on an electrophotographic photosensitive drum with the developer accommodated in the developer accommodating portion; a cartridge frame extended in a longitudinal direction of the developing roller; a bearing member, provided at one longitudinal end portion of the cartridge frame, for supporting a developing roller shaft portion at one longitudinal end portion of the developing roller; a rotational force receiving member for receiving, from the main assembly, a rotational force for rotating the developing roller, in a state in which the cartridge is mounted to the main assembly; a side cover provided outside the bearing member with respect to a longitudinal direction of the cartridge frame; a first fastening member fastening the bearing member to the cartridge frame to mount the bearing member to the cartridge frame; and a second fastening member fastening the side cover to the cartridge frame to mount the side cover to the cartridge frame.
摘要:
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.
摘要:
A cartridge includes a coupling member for receiving a rotational force for rotating a 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, with the cylindrical member side force receiving portion receiving the rotational force received by the coupling member. A first regulating portion is provided inside of the cylindrical member for preventing one end portion of the coupling member from disengaging in an axial direction of the cylindrical member. The first regulating portion is deformable outwardly in a radial direction of the cylindrical member so as to allow the one end portion of the coupling member to disengage in the axial direction of the cylindrical member.
摘要:
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.
摘要:
A cartridge is detachably mountable to the main assembly of an electrophotographic image forming apparatus. The cartridge comprises a developer accommodating portion for accommodating a developer, and a developing roller for developing an electrostatic latent image formed on an electrophotographic photosensitive drum with the developer. A rotational force receiving member is provided for receiving a rotational force for rotating the developing roller. A side cover is provided with an elastic member and an inclination regulating portion for regulating an inclination of the rotational force receiving member. The side cover is mounted to a cartridge frame by the fastening member, with the rotational force receiving member being mounted to the cartridge frame integrally with the side cover.
摘要:
A cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, includes a developer accommodating portion for accommodating a developer; a developing roller for developing an electrostatic latent image formed on an electrophotographic photosensitive drum with the developer accommodated in the developer accommodating portion; a cartridge frame extended in a longitudinal direction of the developing roller; a bearing member, provided at one longitudinal end portion of the cartridge frame, for supporting a developing roller shaft portion at one longitudinal end portion of the developing roller; a rotational force receiving member for receiving, from the main assembly, a rotational force for rotating the developing roller, in a state in which the cartridge is mounted to the main assembly; a side cover provided outside the bearing member with respect to a longitudinal direction of the cartridge frame; a first fastening member fastening the bearing member to the cartridge frame to mount the bearing member to the cartridge frame; and a second fastening member fastening the side cover to the cartridge frame to mount the side cover to the cartridge frame.
摘要:
A cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, includes a developer accommodating portion for accommodating a developer; a developing roller for developing an electrostatic latent image formed on an electrophotographic photosensitive drum with the developer accommodated in the developer accommodating portion; a coupling member for receiving a rotational force for rotating the developing roller from the main assembly, in a state in which the cartridge is mounted to the main assembly; a cylindrical member movably supporting one end portion of the coupling member inside of the cylindrical member; a cylindrical member side force receiving portion, provided inside the cylindrical member, for receiving the rotational force received from the main assembly by the coupling member; a gear, provided on an outer periphery of the cylindrical member, for transmitting the rotational force received by the cylindrical member side force receiving portion to the developing roller; a first regulating portion, provided inside of the cylindrical member and deformable in a radial direction of the cylindrical member, 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 is mounted to an inside of the cylindrical member with deformation of the first regulating portion.
摘要:
An image forming apparatus to which a plurality of cartridges are detachably mountable, the cartridges each having a cartridge side identification portion, the image forming apparatus includes a plurality of mounting portions to which the cartridges are demountably mountable; and a identification urging means, provided in each of the mounting portions, for permitting a cartridge to be mounted to the mounting portion when the cartridge is properly to be mounted to the mounting portion on the basis of correspondence with the cartridge side identification portion, and for urging the cartridge in a direction opposite a direction in which the cartridge is mounted when the cartridge is improper for the mounting portion.