Process cartridge with a coupling member having a movable force receiving portion

Patent metadata

Field	Value
Publication number	US-11073787-B2
Application number	US-202016893788-A
Country	US
Kind code	B2
Filing date	Jun 5, 2020
Priority date	Dec 14, 2012
Publication date	Jul 27, 2021
Grant date	Jul 27, 2021

Abstract

A process cartridge including a photosensitive drum; a developing roller; a rotatable roller having a rotation shaft in a position deviated from an axis of the developing roller; an Oldham coupling member at an end portion of the shaft of the rotatable roller; an urging member for urging the drive receiving portion; a supporting portion supporting the drive receiving portion; an abutting portion receiving the supporting portion urged by the urging member, an elastic sheet positioned to contact at least part of the Oldham coupling member, wherein the abutting portion is positioned outside an outer periphery of the drum on a plane perpendicular to the shaft of the rotatable roller.

First claim

The invention claimed is:

1. A process cartridge comprising:
a photosensitive drum;
a rotatable developing roller for developing an electrostatic latent image formed on the photosensitive drum;
a coupling member including a driving force receiving portion for receiving a driving force to be transmitted to the developing roller, wherein the driving force receiving portion is movable relative to the developing roller in a direction crossing an axis of the developing roller;
an urging member for urging the driving force receiving portion in the direction crossing the axis of the developing roller;
a supporting portion for rotatably supporting the driving force receiving portion so as to be movable together with the driving force receiving portion relative to the developing roller in the direction crossing the axis of the developing roller; and
an abutting portion for receiving the supporting portion urged by the urging member,
wherein the abutting portion is positioned outside an outer periphery of the photosensitive drum in a plane perpendicular to the axis of the developing roller, and
wherein one of the developing roller and the coupling member is configured to rotate in a clockwise direction and the other of the developing roller and the coupling member is configured to rotate in a counterclockwise direction.

2. A process cartridge according to claim 1 , further comprising a rotatable roller,
wherein the driving force received by the driving receiving portion is transmitted to the developing roller through the rotatable roller.

3. A process cartridge according to claim 2 , wherein the rotatable roller is provided with a gear configured to transmit the driving force received by the driving force receiving portion to the developing roller.

4. A process cartridge according to claim 2 , wherein the rotatable roller contacts the developing roller in order to supply toner to the developing roller.

5. A process cartridge according to claim 2 , wherein the rotatable roller includes the coupling member.

6. A process cartridge according to claim 1 , wherein the developing roller is capable of moving toward the photosensitive drum and away from the photosensitive drum.

7. A process cartridge according to claim 1 , wherein the abutting portion is provided between the photosensitive drum and the developing roller in the plane perpendicular to the axis of the developing roller.

8. A process cartridge according to claim 1 , wherein the coupling member includes:
an intermediary portion engageable with the driving force receiving portion, wherein the driving force receiving portion is movable relative to the intermediary portion in a direction crossing an axis of the intermediary portion, and
a follower portion engageable with the intermediary portion, wherein the intermediary portion is movable relative to the follower portion in a direction crossing an axis of the follower portion,
wherein the direction in which the driving force receiving portion moves relative to the intermediary portion is different from the direction in which the intermediary portion moves relative to the follower portion.

9. A process cartridge according to claim 1 , wherein the urging member is elastically deformable.

10. A process cartridge according to claim 1 , wherein the urging member is a spring.

11. A process cartridge according to claim 1 , wherein the coupling member is an Oldham coupling.

12. A process cartridge comprising:
a first unit including a photosensitive drum; and
a second unit movable relative to the first unit, wherein the second unit includes:
a rotatable developing roller configured to develop an electrostatic latent image formed on the photosensitive drum, and
a coupling member including a driving force receiving portion, wherein the driving force receiving portion is movable relative to the developing roller in a direction crossing an axis of the developing roller and is configured to receive a driving force to be transmitted to the developing roller,

wherein the first unit includes a positioning portion provided outside an outer periphery of the photosensitive drum in a plane perpendicular to the axis of the developing roller and configured to position driving force receiving portion, and
wherein one of the developing roller and the coupling member is configured to rotate in clockwise direction and the other of the developing roller and the coupling member is configured to rotate in counterclockwise direction.

13. A process cartridge according to claim 12 , wherein the second unit includes a rotatable roller, and
wherein the driving force received by the driving force receiving portion is transmitted to the developing roller trough the rotatable roller.

14. A process cartridge according to claim 13 , wherein the rotatable roller is provided with a gear configured to transmit the driving force received by the driving force receiving portion to the developing roller.

15. A process cartridge according to claim 13 , wherein the rotatable roller contacts the developing roller in order to supply toner to the developing roller.

16. A process cartridge according to claim 13 , wherein the rotatable roller includes the coupling member.

17. A process cartridge according to claim 12 , wherein the developing roller is capable of moving toward the photosensitive drum and away from the photosensitive drum.

18. A process cartridge according to claim 12 , wherein the second unit includes a supporting portion rotatably supporting the driving force receiving portion to be movable relative to the developing roller together with the driving force receiving portion in a direction crossing the axis of the developing roller, and
wherein the positioning portion positions the driving force receiving portion through the supporting portion.

19. A process cartridge according to claim 12 , wherein the second unit is movable relative to the first unit so as to change a distance between the photosensitive drum and the developing roller.

20. A process cartridge according to claim 12 , wherein the second unit is movable relative to the first unit between (a) a developing position for developing the latent image by the developing roller and (b) a spaced position for spacing the developing roller from the photosensitive drum more than when the second unit is in the developing position, and
wherein, when the second unit is in the spaced position, the positioning portion positions the driving force receiving portion.

21. A process cartridge according to claim 20 , wherein, when the second unit is in the spaced position, at least a part of the positioning portion is provided inside an outer periphery of a developing roller in the plane perpendicular to the axis of the developing roller.

22. A process cartridge according to claim 20 , wherein the second unit includes a rotatable roller, and
wherein at least a part of the positioning portion is outside an outer periphery of the rotatable roller in the plane, when the second unit is in the spacing position.

23. A process cartridge according to claim 20 , wherein the second unit includes a rotatable roller, and
wherein, when the second unit is in the spaced position, the positioning portion is disposed between the photosensitive drum and the rotatable roller in the plane perpendicular to the axis of the developing roller.

24. A process cartridge according to claim 12 , wherein the coupling member includes:
an inte

Assignees

• Canon Kk

Inventors

• Maeshima Hideki
• Tanabe Masato
• Nomura Keisuke
• Shimizu Hiroki

Classifications

• G03G21/1864

  associated with a positioning function · CPC title

• G03G2215/0132

  vertical medium transport path at the secondary transfer · CPC title

• G03G21/1842

  for guiding and mounting the process cartridge, positioning, alignment, locks (G03G21/1864 and G03G21/1871 take precedence) · CPC title

• G03G21/1857

  for transmitting mechanical drive power to the process cartridge, drive mechanisms, gears, couplings, braking mechanisms · CPC title

• G03G21/1803 Primary

  Arrangements or disposition of the complete process cartridge or parts thereof · CPC title