Process cartridge and electrophotographic image forming apparatus

Patent metadata

Field	Value
Publication number	US-9507318-B2
Application number	US-201514825464-A
Country	US
Kind code	B2
Filing date	Aug 13, 2015
Priority date	Jun 29, 2007
Publication date	Nov 29, 2016
Grant date	Nov 29, 2016

Abstract

A process cartridge includes a force receiving member that is provided movably relative to a developing frame. The force receiving member includes a spacing force receiving portion configured to receive a spacing force for moving a developing roller when the force receiving member is in a projected position, and a retracting force receiving portion configured to receive a retracting force for moving the force receiving member toward a retracted position when the force receiving member is in the projected position. The retracting force receiving portion has a surface slanted with respect to the direction in which the spacing force receiving portion is capable of receiving the spacing force.

First claim

What is claimed is:

1. A process cartridge comprising:
an electrophotographic photosensitive drum;
a developing roller movable between a contact position in which the developing roller contacts the electrophotographic photosensitive drum to develop an electrostatic latent image formed on the electrophotographic photosensitive drum and a spaced position in which the developing roller is spaced from the electrophotographic photosensitive drum;
a drum frame supporting the electrophotographic photosensitive drum;
a developing frame supporting the developing roller; and
a force receiving member movable relative to the developing frame to move between a projected position in which the force receiving member is projected outwardly from the developing frame and a retracted position in which the force receiving member is retracted from the projected position toward an inside of the developing frame, the force receiving member including (i) a spacing force receiving portion configured to receive a spacing force for moving the developing roller from the contact position to the spaced position when the force receiving member is in the projected position, and (ii) a retracting force receiving portion configured to receive a retracting force for moving the force receiving member toward the retracted position when the force receiving member is in the projected position,
wherein the spacing force receiving portion is located on a first side of the force receiving member, and the retracting force receiving portion is located on a second side of the force receiving member that is opposite the first side with respect to a direction in which the spacing force receiving portion is capable of receiving the spacing force,
wherein the retracting force receiving portion has a surface slanted with respect to the direction in which the spacing force receiving portion is capable of receiving the spacing force.

2. A process cartridge according to claim 1 , further comprising an urging portion configured to urge the force receiving member toward the projected position,
wherein a part of the urging portion is fixed to the developing frame.

3. A process cartridge according to claim 2 , further comprising an engaging portion configured to engage with the force receiving member to hold the force receiving member at the retracted position against a urging force of the urging portion.

4. A process cartridge according to claim 3 , wherein the engaging portion is disengageable from the force receiving member to release the force receiving member.

Assignees

• Canon Kk

Inventors

• Maeshima Hideki
• Murayama Kazunari
• Yoshimura Akira

Classifications

• G03G21/1825 Primary

  Pivotable subunit connection · CPC title

• G03G21/1842 Primary

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

• G03G21/18

  using a processing cartridge {, whereby the process cartridge comprises at least two image processing means in a single unit} · CPC title

• G03G21/1839 Primary

  Means for handling the process cartridge in the apparatus body · CPC title

• G03G2221/183

  Process cartridge · CPC title