Liquid cartridge including first and second protrusions on top wall of housing

A liquid cartridge comprising:

• a housing defining a liquid storage chamber therein;
• a circuit board including an electrode;
• and
• a liquid supply portion extending in a depth direction crossing a gravitational direction from the housing and having an opening facing forward in the depth direction, the liquid supply portion defining therein a liquid passage connecting the liquid storage chamber to the opening and configured to allow liquid in the liquid storage chamber to flow out of the housing through the opening,
• wherein the housing comprises:
• a top wall at which the circuit board is provided, the top wall facing upward and being positioned upward of the liquid supply portion in an upright posture of the liquid cartridge;
• a first protrusion protruding upward from the top wall and positioned rearward of the circuit board in the depth direction;
• and
• a second protrusion protruding upward from the top wall and positioned forward of the circuit board in the depth direction, the second protrusion extending in the depth direction and having a front end facing forward in the depth direction,
• wherein the first protrusion is positioned higher than an upper edge of the front end of the second protrusion in the upright posture of the liquid cartridge;
• wherein the front end of the second protrusion is positioned forward of the opening of the liquid supply portion in the depth direction,
• wherein, in the upright posture of the liquid cartridge, no part of the liquid cartridge is positioned higher in a height direction opposite the gravitational direction than an imaginary plane in a region between a first point on the first protrusion and a second point on the second protrusion in the depth direction, the second point being the upper edge of the front end of the second protrusion, the imaginary plane passing through each of the first point and the second point and extending in a width direction perpendicular to the depth direction and the gravitational direction, the first protrusion and the second protrusion being positioned below the imaginary plane,
• wherein the housing further comprises a peripheral wall extending downward from a periphery of the top wall, the peripheral wall comprising:
• a front wall facing forward in the depth direction;
• a first side wall extending in the depth direction from the front wall;
• and
• a second side wall extending in the depth direction from the front wall and spaced apart from the first side wall in the width direction, and
• wherein the front end of the second protrusion is positioned to be spaced apart from the front wall in the depth direction and from each of the first side wall and the second side wall in the width direction.