Cartridge, process cartridge and electrophotographic image forming apparatus

A process cartridge comprising:

• a photosensitive drum;
• a developing roller for developing a latent image on the photosensitive drum, the developing roller being movable relative to the photosensitive drum between (i) a first position in which the developing roller is positioned proximate to the photosensitive drum such that the developing roller can develop a latent image on the photosensitive drum and (ii) a second position in which the developing roller is spaced apart from the photosensitive drum;
• and
• a clutch comprising:
• a first drive transmission member capable of receiving a rotational force to thereby rotate about a rotational axis, the first drive transmission member including an engagement portion;
• and
• a second drive transmission member capable of receiving the rotational force from the first drive transmission member to thereby rotate about a rotational axis and transmit the rotational force to the developing roller, the second drive transmission member including an engagement portion,
• wherein the engagement portion of the first drive transmission member and the engagement portion of the second drive transmission member couple by interference when the developing roller is in the first position, to enable the second drive transmission member to receive the rotational force from the first drive transmission member, and
• wherein the engagement portion of the first drive transmission member and the engagement portion of the second drive transmission member are separated from each other when the developing roller is in the second position in order to prevent the second drive transmission member from receiving the rotational force from the first drive transmission member.

A process cartridge comprising:

• a photosensitive drum;
• a developing roller for developing a latent image on the photosensitive drum, the developing roller being movable relative to the photosensitive drum between (i) a first position in which the developing roller is positioned proximate to the photosensitive drum such that the developing roller can develop a latent image on the photosensitive drum and (ii) a second position in which the developing roller is spaced apart from the photosensitive drum;
• and
• a dog clutch comprising:
• a first drive transmission member capable of receiving a rotational force;
• and
• a second drive transmission member capable of receiving the rotational force from the first drive transmission member and transmitting the rotational force to the developing roller when the second drive transmission member is engaged with the first drive transmission member,
• wherein the first drive transmission member is engaged with the second drive transmission member when the developing roller is in the first position and is disengaged from the second drive transmission member when the developing roller is in the second position.

A process cartridge comprising:

• a photosensitive drum;
• a developing roller for developing a latent image on the photosensitive drum, the developing roller being movable relative to the photosensitive drum between (i) a first position in which the developing roller is positioned proximate to the photosensitive drum such that the developing roller can develop a latent image on the photosensitive drum and (ii) a second position in which the developing roller is spaced apart from the photosensitive drum;
• and
• a clutch comprising:
• a first drive transmission member capable of receiving a rotational force input to the clutch;
• and
• a second drive transmission member capable of operably connecting to the first drive transmission member and outputting the rotational force from the clutch,
• wherein the first drive transmission member and the second drive transmission member contact each other when the developing roller is in the first position to enable the second drive transmission member to receive the rotational force from the first drive transmission member, and
• wherein the first drive transmission member and the second drive transmission member are separated from each other when the developing roller is in the second position in order to prevent the second drive transmission member from receiving the rotational force from the first drive transmission member.