| 摘要 |
<p>A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, includes an electrophotographic photosensitive drum; a developing member; a cartridge frame including a developer accommodating portion; a first light guide disposed adjacent one end of the cartridge frame with respect to the direction of an axis of the drum and adjacent a leading end with respect to a mounting direction in which the process cartridge is mounted to a main assembly, including a light entrance portion which is opposed to the emitting portion to receive the detecting light when the process cartridge is mounted to the main assembly, and being effective to guide the detecting light so as to cross a developer accommodating space; a second light guide disposed adjacent the one end of the cartridge frame and adjacent the leading end, including a light exit portion which is opposed to the light receiving portion when the process cartridge is mounted to the main assembly, being effective to direct the detecting light having passed through the developer accommodating space to light receiving portion; and a memory member adapted to communicate with the main assembly, being disposed adjacent the one end of the cartridge frame and adjacent the leading end, and including a cartridge electrical contact provided between a horizontal plane passing through the light entrance portion and a horizontal plane passing through the light exit portion.</p> |
