LIQUID CARTRIDGE

摘要

An ink cartridge has a front surface, an upper surface facing an upward direction when the ink cartridge is installed in a printer, a liquid supply portion facing a first direction at the front surface, a circuit board disposed on the upper surface, a liquid detection portion for detecting a state of liquid stored in the liquid cartridge, and a locking surface disposed at the upper surface and configured to contact a locking portion of a cartridge attaching unit of the printer in a second direction opposite to the first direction. The liquid detection portion includes a light access portion configured to be accessed with light traveling from a first point toward a second point. The light access portion is displaced from the circuit board in the second direction. The locking surface is displaced from the light access portion in the second direction.