Developing cartridge

A developing cartridge, having a left-right direction parallel to a first direction, a front-back direction parallel to a second direction, and an up-down direction parallel to a third direction, wherein the developing cartridge comprises:

• a housing, comprising a bottom housing and a top cover combined with each other, wherein a cavity for accommodating a toner is formed between the bottom housing and the top cover;
• and the bottom housing comprises a bottom side plate located on a lower side, and the bottom side plate has a lower surface facing downward;
• a developing member, disposed in the housing and extending in the first direction;
• an adjustment member, contacting the developing member and configured to adjust a thickness of a toner layer on a surface of the developing member;
• a conductive member, disposed at a first end of the housing in the first direction;
• a chip, disposed at a second end of the housing in the first direction;
• a rib, protruding downward from the lower surface;
• and
• a protective plate, combined with the bottom housing and covering the rib, wherein the rib and the protective plate are located between the conductive member and the chip.