Developing apparatus and process cartridge

A process cartridge comprising:

• an image bearing member;
• and
• a developing apparatus,
• wherein the developing apparatus includes:
• a developing frame member including a conveyance chamber, and a developing chamber disposed above the conveyance chamber in a gravitational direction at a time of image formation;
• a partition configured to divide an inside of the developing frame member into the developing chamber and the conveyance chamber, and provided with an opening for communicating between the developing chamber and the conveyance chamber;
• a developer bearing member stored in the developing chamber;
• a conveyance member stored in the conveyance chamber, and configured to rotate to convey developer into the developing chamber through the opening;
• and
• an inner wall surface disposed inside the conveyance chamber,
• wherein the inner wall surface includes:
• an inclined surface positioned below a rotation center of the conveyance member in the gravitational direction, and inclined toward an upside in the gravitational direction and toward a direction departing from the rotation center in a horizontal direction, along a rotational direction of the conveyance member, wherein at least part of the inclined surface contacting the conveyance member to bend the conveyance member;
• a most proximate portion of the inclined surface where a distance to the rotation center is the shortest;
• a first releasing portion disposed on a downstream side of the most proximate portion in the rotational direction, and configured to release a bending of the conveyance member;
• an extended portion disposed on a downstream side of the first releasing portion in the rotational direction, the extended portion being extended upwardly with respect to the rotation center in the gravitational direction;
• a deforming portion disposed on a downstream side of the inner wall surface in the rotational direction, and configured to bend the conveyance member moved and released from the first releasing portion;
• and
• a second releasing portion disposed on a downstream side of the deforming portion in the rotational direction and on an upstream side of the opening in the rotational direction, and configured to release the bending of the conveyance member, and
• wherein a distance between the first releasing portion and the rotation center, and a distance between the extended portion and the rotation center are longer than a distance between the most proximate portion and the rotation center.