Developing cartridge including electrode and protrusion

A developing cartridge comprising:

• a casing configured to accommodate developer therein;
• a developing roller including a developing roller shaft extending in a first direction;
• a first protrusion positioned at an outer surface of the casing, the first protrusion protruding outward from the outer surface in the first direction;
• and
• an electrode positioned at the outer surface, the electrode configured to be electrically connected to the developing roller shaft, the electrode including a second protrusion protruding outward in the first direction and the second protrusion having an inner space extending in the first direction, the inner space being positioned in the second protrusion,
• wherein the second protrusion has a first end portion and a second end portion, the first end portion and the second end portion arranged in a second direction crossing the first direction, the first end portion being closer to the developing roller shaft than the second end portion,
• wherein the first protrusion is located in a part of the inner space, the part of the inner space being closer to the first end portion than the second end portion in the second direction.

A developing cartridge comprising:

• a casing configured to accommodate developer therein;
• a developing roller including a developing roller shaft extending in a first direction;
• a first protrusion positioned at an outer surface of the casing, the first protrusion protruding outward from the outer surface in the first direction;
• and
• an electrode positioned at the outer surface, the electrode configured to be electrically connected to the developing roller shaft, the electrode including a second protrusion protruding outward in the first direction and the second protrusion having an inner space extending in the first direction, the inner space being positioned in the second protrusion,
• wherein the first protrusion is positioned in the inner space,
• wherein the second protrusion has a first end portion and a second end portion, the first end portion and the second end portion arranged in a direction crossing the first direction, the first end portion being closer to the developing roller shaft than the second end portion,
• wherein the developing cartridge further comprises:
• a third protrusion protruding outward from the outer surface in the first direction, the third protrusion being positioned at an opposite side of the developing roller shaft with respect to the first protrusion;
• and
• a fixing member configured to fix the second end portion to the third protrusion.