Canon Kabushiki Kaisha

Satoshi Nishiya

Masaaki Sato

Tatsuya Suzuki

Kazuhiko Kanno

Masatoshi Yamashita

Yosuke Kashiide

Akira Yoshimura

Tomio Noguchi

Yukio Kubo

Shinjiro Toba

Yuichi Fukui

Kohei Matsuda

Noritomo Yamaguchi

Yuta Isobe

Takahiro Ikeda

Takashi Kase

Kouki Yano

Yusuke Usui

Jun Miura

A cartridge incudes a developing roller for developing a latent image on a photosensitive drum, a drive inputting portion for receiving a driving force for driving the developing roller, a movable lever, and a clutch for transmitting the driving force received by the drive inputting portion to the developing roller. In a state where the developing roller contacts the photosensitive drum, the clutch is capable of preventing the transmission of the driving force to the developing roller in response to a position of the movable lever.

Cartridge, process cartridge and electrophotographic image forming apparatus

A cartridge includes a developing roller rotatable about a rotational axis thereof and a movable lever. A coupling member is operatively connected to the developing roller, with the coupling member being movable, in response to a movement of the lever, between (a) a first position in which the coupling member is exposed to outside of the cartridge, and (b) a second position. The coupling member is provided at a first end portion on a first side of the cartridge. In a direction of the rotational axis of the developing roller, the first position is farther from a second end portion provided on a second side of the cartridge that is opposite to the first end portion on the first side of the cartridge than the second position is from the second end portion on the second side of the cartridge.

A process cartridge includes a photosensitive drum and a developing roller for developing a latent image on the photosensitive drum. The process cartridge also includes a protrusion having a surface configured to receive a force to move a frame supporting the developing roller from the first position in which the developing roller contacts the photosensitive drum to the second position in which the developing roller is spaced apart from the photosensitive drum. The process cartridge is configured such that, when the frame is in the first position and the process cartridge is oriented with the photosensitive drum and the protrusion positioned at a bottom side of the process cartridge, (i) a rotational axis of the photosensitive drum is lower than a rotational axis of the developing roller, and (ii) as viewed in a direction of the rotational axis of the photosensitive drum, the surface of the protrusion extends in a direction that is perpendicular to a part of a surface at the bottom side of the process cartridge that extends away from the photosensitive drum and away from the protrusion.

Image forming apparatus and process cartridge including protrusion to receive a force for moving developing roller

A process cartridge includes a photosensitive drum, a developing roller, and a movable lever. The process cartridge also includes a coupling member operatively connected to the developing roller, with the coupling member being movable in response to a movement of the lever. The process cartridge is configured such that, when the process cartridge is oriented with the photosensitive drum and the developing roller positioned at a downward side of the process cartridge, an end of the lever is positioned lower than a rotational axis of the photosensitive drum and a rotational axis of the developing roller.

A cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, the cartridge includes (i) a rotatable developing roller for developing a latent image formed on a photosensitive member; (ii) a first drive transmission member capable of receiving a rotational force originated by the main assembly; (iii) a second drive transmission member capable of coupling with the first drive transmission member and capable of transmitting the rotational force received by the first drive transmission member to the developing roller; and (iv) a coupling disconnection member including a force receiving portion capable of receiving the force originated by the main assembly, and an urging portion capable of urging at least one of the first drive transmission member and the second drive transmission member by the force received by the force receiving portion to separate one of the first drive transmission member and the second drive transmission member from the other, thereby disconnecting the coupling.

An image forming apparatus includes a mounting portion for mounting a process cartridge, the process cartridge including a first unit having an image bearing drum, and a second unit having a developing roller, the second unit being movable between a contact position in which the roller contacts the drum and a spaced position in which they are mutually spaced; an engageable member engageable with a force receiving portion provided on the second unit; wherein the engageable member is movable between a first position for maintaining the second unit in the spaced position by engaging with the force receiving portion, a second position for permitting movement of the second unit from the spaced position to the contact position; and a third position for permitting the process cartridge to be mounted, by being pressed by the process cartridge to retract, when the process cartridge is mounted to the mounting portion.

Process cartridge having a protrusion with a surface configured to receive a force to move a frame of the process cartridge

A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, includes a rotatable photosensitive drum; a rotatable developing roller configured to develop image formed on the drum, the developing roller being capable of contacting to and spacing from the drum; an urging force receiving portion configured to receive, from a main assembly side urging member, an urging force for spacing the developing roller from the drum; a cartridge side drive transmission member capable of the coupling with a main assembly side drive transmission member and configured to receive, from the main assembly side drive transmission member, a rotational force for rotating the developing roller; and a decoupling member capable of urging the cartridge side drive transmission member by the urging force received by the urging force receiving portion to decouple the cartridge side drive transmission member from the main assembly side drive transmission member.

Growing community of inventors

Yokohama, Japan

Satoshi Nishiya