Protection device for an ink cartridge storage unit

A protection device for ink cartridge storage unit having a storage main body with one side having an opening, an ink inducing member arranged on a surface of the main body facing the side having the opening, and a cover member for covering the opening, wherein the cover member is connected to the storage main body and rotates between an opened state and a closed state, and includes a pair of projections arranged on an interior surface of the cover member that faces the ink inducing member in the closed state, the protection device comprising:

• a main body having an front face and a rear face, wherein the front face horizontally faces the rear face;
• a sealing member connected to the main body, the sealing member protruding from the front face, wherein the sealing member seals the ink inducing member in the closed state;
• and
• a guiding protrusion arranged at the rear face, wherein the guiding protrusion protrudes from the rear face, and the width of the guiding protrusion is equal to or smaller than the width between the pair of projections, and the guiding protrusion is guided in between the pair of projections in the course of rotating the cover member to its closed state.