INK CARTRIDGE FOR INKJET PRINTER FOR IMPROVING EFFICIENCY OF INK USAGE

摘要

PURPOSE: An ink cartridge for an inkjet printer is provided to improve the efficiency of ink usage by using a negative pressure maintenance unit. CONSTITUTION: An ink cartridge for an inkjet printer includes a cartridge housing(100), a first flexible film(120a) and a second flexible film(120b), a negative pressure maintenance unit(110), a first side plate(111a) and a second side plate(111b), and a first leaf spring and a second leaf spring. The cartridge housing(100) has opened both sides. The first flexible film(120a) and the second flexible film(120b) are attached to both sides of the cartridge housing(100) in such a manner that ink is filled in the inner space of the housing. The negative pressure maintenance unit(110) maintains negative pressure state with a respect to a space provided between the first flexible film(120a) and the second flexible film(120b), with which ink is filled.