Cartridge and printing material supply system

A cartridge adapted to be mounted on a printing apparatus, the printing apparatus comprising a plurality of apparatus-side contact forming members arranged to apply elastic force to the cartridge, the printing apparatus also comprising a lever adapted to move with respect to the printing apparatus as the cartridge is mounted on the printing apparatus, the lever having an engagement portion, the cartridge comprising:

• a cartridge body comprising an electrical device, the cartridge body including a front, a rear, a top, and a bottom, wherein the front and rear are opposite each other and the top and bottom are opposite each other;
• a liquid chamber for storing liquid;
• a liquid supply structure positioned at the bottom, configured to supply liquid from the liquid chamber to the printing apparatus, the liquid supply structure having a mounting direction leading edge defining a plane of the cartridge;
• electrically conductive terminals located closer to the front than to the rear and coupled to the electrical device, the terminals arranged to make contact with and receive elastic force from the contact forming members at contact portions of the terminals when the cartridge is mounted on the printing apparatus, the contact portions of the terminals arranged substantially in a contact portion plane which is neither parallel nor perpendicular to the plane defined by the leading edge;
• and
• a first restriction portion including a cartridge-side engagement portion adapted to engage with the moveable engagement portion of the printer-side lever so as to restrict movement of the cartridge in a direction opposite the mounting direction, the first restriction portion provided at a position located closer to at least one of the contact portions than to the top.