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    • 50. 发明授权
    • Ink jet recording apparatus, ink jet recording head therefor and method
for determining the ejection state thereof
    • 喷墨记录装置,喷墨记录头及其喷射状态的确定方法
    • US5731826A
    • 1998-03-24
    • US277011
    • 1994-07-19
    • Hirofumi Hirano
    • Hirofumi Hirano
    • B41J2/175B41J2/05B41J2/165B41J2/195H01L41/04
    • B41J2/16579
    • A preliminary ejection sensor of an ink jet recording apparatus includes a vibration plate adapted to vibrate on receipt of an ink droplet ejected from an ejection port on a recording head in order to detect the vibration of the vibration plate depending on variation of a gap between a core and the vibration plate, whereby it can be checked whether ink is ejected from the recording head or not. In addition, the preliminary ejection sensor can check the present ink ejecting state of the recording head. Thus, in contrast with a conventional sensing system wherein ink ejection is sensed by an optical sensor on one side surface of the recording head, the structure of the ink jet recording apparatus can be simplified. Additionally, in contrast with another conventional checking system wherein a temperature sensor is disposed on the recording head to indirectly check the present ink ejecting state of the recording head by monitoring the elevated temperature, the ink jet recording apparatus assures that a checking operation can quickly be achieved at a high accuracy. Consequently, the ink jet recording apparatus makes it possible to exactly detect whether or not ink is correctly ejected from ink ejection ports formed on the jet recording head.
    • 喷墨记录装置的初步喷射传感器包括:振动板,其适于在接收到从记录头上的喷射口喷出的墨滴时振动,以便根据在记录头之间的间隙的变化来检测振动板的振动 芯和振动板,从而可以检查墨水是否从记录头喷射。 此外,预备喷射传感器可以检查记录头的当前喷墨状态。 因此,与通过记录头的一个侧表面上的光学传感器感测墨喷射的常规感测系统相反,可以简化喷墨记录装置的结构。 此外,与其他传统的检查系统相比,其中温度传感器设置在记录头上,以通过监测升高的温度间接地检查记录头的当前的喷墨状态,喷墨记录设备确保检查操作可以快速地 以高精度实现。 因此,喷墨记录装置能够精确地检测从形成在喷墨记录头上的喷墨口是否正确地喷出墨。