Processing cartridge, photoreceptor drum unit, and end member pair
AssigneeMitsubishi Chemical Corporation
InventorSHUICHI IKEDA
Life of this patent
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Abstract
A photoreceptor drum unit is provided with a cylindrical photoreceptor drum, and two end members which are respectively disposed at both ends of the photoreceptor drum in an axial direction. One of the end members is provided with an elastic member, is biased in the axial direction, and is extendable and contractable. The other of the end members is provided with a cylindrical bearing member and a shaft member held in the bearing member.
Claims18
A processing cartridge to be attached to and detached from an image forming apparatus main body, the processing cartridge comprising:
- a housing;
- and
- a photoreceptor drum unit which is disposed in the housing and held in the housing,
- wherein the photoreceptor drum unit includes:
- a cylindrical photoreceptor drum;
- and
- two end members which are respectively disposed at both ends of the photoreceptor drum in an axial direction,
- wherein one of the end members is provided with an elastic member, is biased in the axial direction, and is extendable and contractable,
- wherein the other of the end members is provided with a cylindrical bearing member and a shaft member held in the bearing member, and
- wherein the one of the end members and the other of the end members come into contact with the housing on surfaces opposite to the photoreceptor drum, and do not come into contact with the housing on surfaces facing the photoreceptor drum side.
A photoreceptor drum unit comprising:
- a cylindrical photoreceptor drum;
- and
- two end members which are respectively disposed at both ends of the photoreceptor drum in an axial direction,
- wherein one of the end members is provided with an elastic member, is biased in the axial direction, and is extendable and contractable,
- wherein the other of the end members is provided with a cylindrical bearing member and a shaft member held in the bearing member, and
- wherein a gear is formed in an outer circumferential portion of the bearing member of the other of the end members, and
- wherein an outer diameter of the bearing member is equal to or smaller than an outer diameter of the photoreceptor drum except a part at which the gear is formed.
An end member pair which is disposed in an end portion of a photoreceptor drum,
- wherein one end member is provided with an elastic member, is biased, and is extendable and contractable,
- wherein the other end member is provided with a cylindrical bearing member and a shaft member held in the bearing member, and
- wherein a gear is formed in an outer circumferential portion of the bearing member, and an outer diameter of the bearing member is formed to be the largest at a part where the gear is formed.
Dependencies are inferred from the claim text.