| 摘要 |
A detection member (115) and a float member (116) fixed to the detection member (115) are provided in a liquid cartridge (110). When liquid within the liquid cartridge (110) decreases and reaches the float member (116), the float member 116 moves along a direction Q1. Simultaneously, as the detection member (115) moves, a light blocking section (162a), a slit (161), and a light blocking section (162b) sequentially come to a detection position (142). Hence, detecting, with an optical sensor, which one of the light blocking section (162a), the slit (161), and the light blocking section (162b) is located enables the remaining amount of liquid to be grasped in at least three stages. In this way, even in a case where a fixed optical sensor is employed, amounts of the liquid left in the liquid cartridge can be detected in multiple stages.
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