| 摘要 |
A developer cartridge (1, 51) is used with an image forming apparatus (20, 50). The developer cartridge (1, 51) has a groove (3, 52) which formed in a longitudinal end surface (2A) of thereof and extends in an insertion direction (A) of the cylinder. A strip-shaped projection (22, 62) formed in the image forming apparatus projects extends in the insertion direction (A). When the developer cartridge (1, 51) is fully inserted into the image forming apparatus, the groove (3, 52) receives the projection so that the projection is at a predetermined position relative to the developer cartridge (1, 51). Two first walls (3c, 3d, 52c, 52d) define the groove which is progressively wide as the circumference (3a) is approached. A second wall (4a, 54a) rises from the longitudinal end surface of the developer cartridge (1, 51) and is continuous with one of the two first opposed walls (3c, 3d, 52c, 52d). The second wall (4a, 54a) smoothly guides the projection (22, 62) into the groove. <IMAGE> |
