Nozzle ink cartridge, circuit substrate, and nozzle ink cartridge assembly

A circuit substrate, applied in an nozzle ink cartridge, wherein the nozzle ink cartridge includes a first circuit substrate, an accommodation portion, and an ink container that is replaceable;

• the first circuit substrate is configured with a nozzle circuit and a first interface circuit which are electrically connected to each other, the nozzle ink cartridge being electrically connected or disconnected to an image forming apparatus through the first interface circuit;
• the ink container is contained in the accommodation portion;
• the ink container is configured with a first storage circuit and a fourth interface circuit which are electrically connected to each other;
• the fourth interface circuit is electrically connected to a third interface circuit;
• and the first storage circuit at least stores ink amount information of the ink container;
• wherein the circuit substrate is configured with a second interface circuit, the third interface circuit, and a switching circuit;
• the second interface circuit and the first interface circuit are electronically connected to each other;
• and the switching circuit is configured to cause an electrical disconnection from the image forming apparatus through an electrical disconnection between the second interface circuit and the third interface circuit.

A nozzle ink cartridge assembly, including an ink cartridge main body and a first circuit substrate disposed on the ink cartridge main body, wherein the first circuit substrate is configured with a nozzle circuit and a first interface circuit that are electrically connected to each other, the nozzle ink cartridge being electrically connected or disconnected to an image forming apparatus through the first interface circuit;

• and the nozzle ink cartridge assembly further comprising:
• a second circuit substrate disposed on the ink cartridge main body, wherein the second circuit substrate is configured with a second interface circuit and a third interface circuit;
• and the second interface circuit and the first interface circuit are disposed on a same side of the ink cartridge main body and are electrically connected to each other;
• an accommodation portion capable of accommodating an ink container that is replaceable, wherein:
• the second circuit substrate is further configured with a switching circuit, and the switching circuit is configured to cause an electrical disconnection from the image forming apparatus through an electrical disconnection between the second interface circuit and the third interface circuit.