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    • 27. 发明授权
    • Droplet jet apparatus
    • 液滴喷射装置
    • US5502472A
    • 1996-03-26
    • US154108
    • 1993-11-17
    • Masahiko Suzuki
    • Masahiko Suzuki
    • B41J2/045B41J2/055B41J2/16C23C4/12
    • B41J2/1623B41J2/1609B41J2/1646
    • A droplet jet apparatus using an actuator serves as an electromechanical transducer that acts as an energy generator used for the ejection of droplets. The actuator has a plurality of grooves and walls made of piezoelectric material that define liquid channels and pressure chambers. Drive electrodes are formed on both sides of each wall. The drive electrodes formed on both sides of each piezoelectric wall fall within an electrode depth range of .+-.30% or less with respect to a set value of an electrode depth d extending in the wall height direction. Thus, the droplets can be stably jetted for a long period of time by setting the electrode depth to a proper value.
    • 使用致动器的液滴喷射装置用作用作喷射液滴的能量发生器的机电换能器。 致动器具有多个由压电材料制成的凹槽和壁,其限定液体通道和压力室。 驱动电极形成在每个墙壁的两侧。 形成在每个压电壁的两侧的驱动电极相对于在壁高方向上延伸的电极深度d的设定值落在±30%以下的电极深度范围内。 因此,通过将电极深度设定为适当的值,能够长时间稳定地喷射液滴。
    • 28. 发明授权
    • Piezoelectric ink jet printer head
    • 压电式喷墨打印头
    • US5266964A
    • 1993-11-30
    • US756982
    • 1991-09-09
    • Yoshikazu TakahashiMasahiko Suzuki
    • Yoshikazu TakahashiMasahiko Suzuki
    • B41J2/045B41J2/055B41J2/14B41J2/16H01L41/08
    • B41J2/14209B41J2002/14217B41J2002/14225Y10T29/42Y10T29/49401
    • In a piezoelectric ink jet printer head having a laminated piezoelectric layer, actuating voltage is applied between only electrodes corresponding to a selected jetting device. A part of the piezoelectric ceramic layers between the electrodes is deformed in accordance with a slip effect, to jet ink from the selected jetting device. Since the polarization direction of the piezoelectric ceramic layers is almost perfectly perpendicular to the direction of an actuating electric field, the actuating voltage can be reduced. Further, piezoelectric ceramic layers can be stacked to obtain the necessary strength of a laminated piezoelectric element without decreasing the displacement amount. Thus, the reliability of the laminated piezoelectric element is enhanced. Moreover, the insulation of the electrodes is not deteriorated by a short circuit, migration of silver or the like. Such properties as durability and moisture resistance are also enhanced. Therefore, the printer head of the invention requires no components for preventing the deterioration of the insulation needed for prior art printer heads. The printer head can be thus made compact and lightweight, reducing the manufacturing cost.
    • 在具有层叠压电层的压电喷墨打印机头中,在对应于所选择的喷射装置的仅电极之间施加致动电压。 电极之间的压电陶瓷层的一部分根据滑动效应而变形,从所选择的喷射装置喷射墨水。 由于压电陶瓷层的极化方向几乎完全垂直于致动电场的方向,所以可以降低致动电压。 此外,可以堆叠压电陶瓷层以获得层压型压电元件所需的强度,而不会降低位移量。 因此,层压型压电元件的可靠性提高。 此外,电极的绝缘不会由于短路,银的迁移等而劣化。 耐久性和耐湿性等特性也得到提高。 因此,本发明的打印头不需要用于防止现有技术的打印头所需绝缘的劣化的部件。 因此,打印机头可以制造得紧凑和重量轻,从而降低制造成本。