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    • 7. 发明授权
    • Remaining ink detecting device and ink jet head cartridge
    • 剩余墨水检测装置和喷墨头盒
    • US5329304A
    • 1994-07-12
    • US851129
    • 1992-03-16
    • Ryoichi KoizumiAsao Saito
    • Ryoichi KoizumiAsao Saito
    • B41J2/175
    • B41J2/17566B41J2002/17579B41J2202/13
    • A device for detecting a quantity of remaining ink includes first and second electrodes provided in an ink supply passage which connects an ink tank for storing an ink to a recording head for emitting the ink, and a detection means for detecting a resistance between the first and second electrodes. The second electrode is provided in the ink supply passage in an area relatively close to the recording head, whereas the first electrode is provided in the ink supply passage in an area relatively far from the recording head with the second electrode therebetween. The second electrode is maintained at the same potential as that of a substrate which constitutes the recording head and on which emission energy generating elements driven to emit the ink are disposed, whereas the first electrode is maintained at a potential different from that of the second electrode. Consequently, the amount of remaining ink can be detected by measuring changes in the resistance between the first and second electrodes.
    • 用于检测剩余墨水量的装置包括设置在墨水供应通道中的第一和第二电极,墨水供应通道将用于存储墨水的墨水罐连接到用于发射墨水的记录头,以及检测装置,用于检测第一和第 第二电极。 第二电极设置在相对靠近记录头的区域中的供墨通道中,而第一电极设置在相对远离记录头的区域中的供墨通道中,其间具有第二电极。 第二电极保持与构成记录头的基板相同的电位,并且在其上设置驱动发射墨的发射能量产生元件,而第一电极被保持在与第二电极不同的电位 。 因此,可以通过测量第一和第二电极之间的电阻的变化来检测剩余墨水的量。