End member, photosensitive drum unit, and process cartridge

Patent metadata

Field	Value
Publication number	US-10254702-B2
Application number	US-201715843204-A
Country	US
Kind code	B2
Filing date	Dec 15, 2017
Priority date	Jun 17, 2015
Publication date	Apr 9, 2019
Grant date	Apr 9, 2019

Abstract

An end member includes a tubular bearing member and a shaft member held by the bearing member. The shaft member includes a rotating shaft rotatable around an axis and movable in an axial direction, and a rotating force receiving member disposed in one end portion of the rotating shaft and including an engaging member to be engaged with a driving shaft of the image forming apparatus body. The engaging member is switchable between a posture of being engaged with the driving shaft and a posture of not being engaged with the driving shaft. A maximum static friction coefficient applied when the rotating shaft moves in a rotating axial direction with respect to the bearing member is equal to or less than 0.40 where a force that acts in a direction orthogonal to a frictional force direction is 2.5 to 10.5 N.

First claim

What is claimed is:

1. An end member to be disposed in an end portion of a columnar rotating body mounted on an image forming apparatus body, the end member comprising:
a tubular bearing member; and
a shaft member held by the bearing member,
wherein the shaft member includes a rotating shaft which is rotatable around an axis and movable in an axial direction, and a rotating force receiving member which is disposed in one end portion of the rotating shaft and includes an engaging member to be engaged with a driving shaft of the image forming apparatus body,
wherein the engaging member is switchable between a posture of being engaged with the driving shaft and a posture of not being engaged with the driving shaft, and
wherein a maximum static friction coefficient applied when the rotating shaft moves in a rotating axial direction with respect to the bearing member is equal to or less than 0.40 where a force that acts in a direction orthogonal to a frictional force direction is 2.5 to 10.5 N.

2. The end member according to claim 1 , wherein the bearing member includes an intermediate member having a guiding groove, and the intermediate member holds the shaft member to be rotatable around the axis and movable in the axial direction.

3. The end member according to claim 2 , wherein the intermediate member which holds the shaft member is attachable and detachable in a state of being mounted on a cartridge.

4. The end member according to claim 2 , wherein the intermediate member is made of a resin.

5. A photosensitive drum unit comprising:
the end member according to claim 1 in the end portion of the columnar rotating body.

6. A process cartridge comprising:
the photosensitive drum unit according to claim 5 .

Assignees

• Mitsubishi Chem Corp
• Gen Plastic Ind Co Ltd

Inventors

• Ikeda Shuichi
• Matsuoka Yohei
• Iijima Shinichi

Classifications

• G03G21/186

  Axial couplings · CPC title

• G03G21/1853

  the process cartridge being mounted perpendicular to the axis of the photosensitive member · CPC title

• G03G2221/1657

  transmitting mechanical drive power · CPC title

• F16D1/10

  Quick-acting couplings in which the parts are connected by simply bringing them together axially · CPC title

• G03G21/185

  the process cartridge being mounted parallel to the axis of the photosensitive member · CPC title