| 摘要 |
<p>A process cartridge comprises a drum cartridge (300) and a developer cartridge (400), wherein the drum cartridge (300) and the developer cartridge (400) are rotatablely connected via a pivot shaft, and a connecting spring for applying an acting force F1 to bring a photosensitive drum and a developing roller close to each other is disposed between the drum cartridge (300) and the developer cartridge (400); a stressed member (10) with a projecting portion (11), which projects out of the process cartridge and is rotatable about a rotation axis, is disposed on the developer cartridge (400); and a stop block for applying an acting force F2 on the stressed member (10) to prevent the same from rotating and hold the same in an initial position. When the process cartridge is installed in or removed from a printer, a first force application portion in the printer applies an acting force F3 against the projecting portion (11) to rotate the same; when the process cartridge is installed in the printer, a second force application portion in the printer applies an acting force F4 against the projecting portion (11) to separate the photosensitive drum and the developing roller; and these acting forces have the following relationship: F3>F2>F4>F1.</p> |
