Developing and processing boxes

Abstract

This utility model provides a developing cartridge, including a housing, a developing roller rotatably supported by the housing, and reinforcing ribs for strengthening the housing. The developing roller supplies toner outward and rotates about a first rotation axis L1 parallel to the longitudinal direction. The housing includes a front cover and a bottom cover joined together, which together form a cavity for containing developer. The side of the bottom cover facing away from the cavity is an outer side, and multiple reinforcing ribs protrude downward from this outer side in the vertical direction. The developing cartridge is provided with longitudinal end faces located at both ends of the bottom cover, and the multiple reinforcing ribs are spaced apart in the longitudinal direction. The developing cartridge also includes a first space and a second space between the reinforcing ribs located at the two longitudinal ends and the longitudinal end faces of their respective ends. The projection surfaces of the first space and the second space on the bottom cover are both smooth and uninterrupted, allowing the developing cartridge to be installed smoothly.

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