Photosensitive drum unit, assembling method therefor, and disassembling method therefor
A photosensitive drum unit includes a photosensitive drum having a cylinder, a rotational force receiving member, a spherical member including a projected portion, and a drum flange provided at one end portion of the cylinder and accommodating the spherical member. The drum flange includes (i) a hole portion capable of accommodating the spherical portion and having an opening that opens outwardly in the longitudinal direction of the cylinder, (ii) a groove portion that continues from the hole portion and is capable of accommodating the projected portion for receiving the rotational force from the projected portion, and (iii) a limiting portion for limiting inward movement of the spherical portion in the longitudinal direction of the cylinder.
1. A photosensitive drum unit comprising:
a photosensitive drum having a cylinder provided with a photosensitive portion at a peripheral surface thereof;
a rotational force receiving member for receiving a rotational force for rotating the photosensitive drum, the rotational force receiving member including a rotational force receiving portion for receiving the rotational force at one end portion side thereof and a portion-to-be-engaged at another end portion side thereof;
a spherical member including a spherical portion, a projected portion projected from the spherical portion, and an engaging portion for engaging with the portion-to-be-engaged;
a drum flange provided at one end portion of the cylinder and accommodating the spherical member, the drum flange including (i) a hole portion capable of accommodating the spherical portion and having an opening that opens outwardly in the longitudinal direction of the cylinder, (ii) a groove portion that continues from the hole portion and is capable of accommodating the projected portion for receiving the rotational force from the projected portion, and (iii) a limiting portion for limiting inward movement of the spherical portion in the longitudinal direction of the cylinder; and
a closing member capable of partially covering the opening of the hole portion and capable of being mounted to the drum flange to limit outward movement of the spherical portion in the longitudinal direction of the cylinder,
wherein one of the engaging portion and the portion-to-be-engaged includes a male screw portion and the other of the engaging portion and the portion-to-be-engaged includes a female screw portion.
2. A photosensitive drum unit comprising:
a photosensitive drum having a cylinder provided with a photosensitive portion at a peripheral surface thereof;
a rotational force receiving member for receiving a rotational force for rotating the photosensitive drum, the rotational force receiving member including a rotational force receiving portion for receiving a rotational force at one end portion side thereof and a portion-to-be-engaged at another end portion side thereof;
a spherical member including a spherical portion, a projected portion projected from the spherical portion, and an engaging portion for engaging with the portion-to-be-engaged;
a drum flange provided at one end portion of the cylinder and accommodating the spherical member, the drum flange including (i) a hole portion that opens outwardly in the longitudinal direction of the cylinder and is capable of accommodating the spherical portion, (ii) a groove portion that continues from the hole portion and is capable of accommodating the projected portion for receiving the rotational force from the projected portion, and (iii) a limiting portion, provided at one end portion of the hole portion, for limiting inward movement of the spherical portion in the longitudinal direction of the cylinder; and
a regulating portion, provided at the other end portion of the hole portion, for limiting outward movement of the spherical portion in the longitudinal direction of the cylinder,
wherein one of the engaging portion and the portion-to-be-engaged includes a male screw portion and the other of the engaging portion and the portion-to-be-engaged includes a female screw portion.