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    PIEZOELECTRIC ELEMENT AND STACKED PIEZOELECTRIC STRUCTURE
    1.
    发明申请
    PIEZOELECTRIC ELEMENT AND STACKED PIEZOELECTRIC STRUCTURE 有权
    压电元件和堆叠压电结构

    公开(公告)号：US20130221807A1

    公开(公告)日：2013-08-29

    申请号：US13820465

    申请日：2011-08-22

    申请人： Hiroyuki Shimizu ,  Yutaka Doshida

    发明人： Hiroyuki Shimizu ,  Yutaka Doshida

    IPC分类号： H01L41/047

    CPC分类号： H01L41/0471 ,  H01L41/0472 ,  H01L41/0475 ,  H01L41/0536 ,  H01L41/083

    摘要： A stacked piezoelectric actuator has a laminate structure including piezoelectric layers and cover parts such that when an external electrode is applied with drive voltage, the piezoelectric layers become distorted and the entire stacked piezoelectric actuator deforms, and at that time, the cover parts become displaced, wherein the distortion difference occurring between the piezoelectric layers and the cover parts reduces, thereby inhibiting the development of cracks. Moreover, the surface area of the active region of the piezoelectric layers is the same as the surface area of the active region of the cover parts, and therefore the loss of the displacement transfer, which is produced by the piezoelectric layers, at the cover parts is reliably reduced.

    摘要翻译： 叠层压电致动器具有包括压电层和覆盖部分的层压结构，使得当外部电极被施加驱动电压时，压电层变形并且整个堆叠压电致动器变形，并且此时盖部件变位， 其中在压电层和盖部之间发生的变形差减小，从而抑制裂纹的发展。 此外，压电层的有源区的表面积与盖部的有源区的表面积相同，因此由压电层产生的位移转移的损失在盖部 可靠地减少。

    PIEZOELECTRIC DRIVE ELEMENT AND PIEZOELECTRIC DRIVE UNIT
    2.
    发明申请
    PIEZOELECTRIC DRIVE ELEMENT AND PIEZOELECTRIC DRIVE UNIT 有权
    压电元件和压电驱动单元

    公开(公告)号：US20130207512A1

    公开(公告)日：2013-08-15

    申请号：US13876455

    申请日：2012-04-18

    申请人： Yutaka Doshida

    发明人： Yutaka Doshida

    IPC分类号： H01L41/083

    CPC分类号： H01L41/083 ,  H01L41/183 ,  H01L41/273 ,  H01L41/37

    摘要： A piezoelectrically actuated element includes a composite ceramic to which an alternating electric field is applied through external electrodes that are orthogonal to the polarization direction, wherein the composite ceramic is formed from a first piezoelectric ceramic having soft spring characteristics such that the elastic constant decreases with increasing vibration velocity, and a second piezoelectric ceramic having hard spring characteristics such that the elastic constant increases with increasing vibration velocity. Even when the applied electric field is intensified to increase the vibration velocity of the piezoelectrically actuated element, the overall change in the elastic constant is minimized, and fluctuations in the resonance frequency is suppressed.

    摘要翻译： 压电致动元件包括复合陶瓷，通过与偏振方向正交的外部电极施加交变电场，复合陶瓷由具有软弹簧特性的第一压电陶瓷形成，使得弹性常数随着增加而减小 振动速度和具有硬弹簧特性的第二压电陶瓷，使得弹性常数随着振动速度的增加而增加。 即使当施加的电场增强以增加压电致动元件的振动速度时，弹性常数的总体变化被最小化，并且谐振频率的波动被抑制。

    Piezo drive system
    5.
    发明授权
    Piezo drive system 失效
    压电驱动系统

    公开(公告)号：US07923898B2

    公开(公告)日：2011-04-12

    申请号：US12265676

    申请日：2008-11-05

    申请人： Yutaka Doshida ,  Taisei Irieda

    发明人： Yutaka Doshida ,  Taisei Irieda

    IPC分类号： H02N2/00

    CPC分类号： H02N2/106 ,  G02B7/08 ,  H01L41/083 ,  H02N2/123

    摘要： A piezo drive system includes an elastic fixing frame, a drive element, a rod, and a rotor. A vamplate portion is formed on the outer surface of the rod. One end of the rod is secured to around the center of a face of the drive element. The rotor consists of a cylindrical portion and a disk portion, and can rotate relative to the rod. Protrusions are formed on the inside of a top surface portion of the fixing frame to push against the disk portion. Using the drive element, the rod rotates while tilting and makes a surface contact with the vamplate portion, producing friction. Consequently, the rotor is rotated.

    摘要翻译： 压电驱动系统包括弹性固定框架，驱动元件，杆和转子。 在棒的外表面上形成有一个液滴部分。 杆的一端固定在驱动元件的表面的中心附近。 转子由圆柱形部分和圆盘部分组成，并且可相对于杆旋转。 突起形成在固定框架的顶表面部分的内侧，以推动盘部分。 使用驱动元件，杆在倾斜的同时旋转并且与液压部分表面接触，产生摩擦。 因此，转子旋转。

    Piezoelectric drive unit and piezoelectric drive element
    6.
    发明申请
    Piezoelectric drive unit and piezoelectric drive element 有权
    压电驱动单元和压电驱动元件

    公开(公告)号：US20070182277A1

    公开(公告)日：2007-08-09

    申请号：US11652811

    申请日：2007-01-12

    申请人： Yutaka Doshida

    发明人： Yutaka Doshida

    IPC分类号： H02N2/00

    CPC分类号： G02B7/102 ,  H01L41/0471 ,  H01L41/0913 ,  H02N2/026

    摘要： A piezoelectric drive unit and a piezoelectric drive element are provided, which are compact and lightweight, and able to be stably displaced and positioned, in addition, efficiently driven even at low voltage. One end of a rod is fixed to an approximate center of a main surface of a piezoelectric drive element (drive element). The drive element is in a configuration where two element structures are incorporated by dividedly forming part of internal electrodes being alternately layered with a plurality of pieces of piezoelectrics, and has two regions divided with the center of the element as an origin. When signal are inputted into the internal electrodes via terminal electrodes such that a phase is shifted by 90 degrees between the two regions, the rod is rotated. When a tip of the rod is biased to be disposed by a spring such that it is pressed to a side face of a shaft for guiding a sliding frame of a lens, the lens slides along the shaft with rotation of the rod.

    摘要翻译： 提供压电驱动单元和压电驱动元件，其紧凑且重量轻，并且能够被稳定地移位和定位，此外，即使在低电压下也能有效地驱动。 杆的一端固定到压电驱动元件（驱动元件）的主表面的大致中心。 驱动元件是通过分割地形成与多个压电体交替层叠的内部电极的一部分并入的构造，并且具有以元件的中心为原点的两个区域。 当信号经由端子电极输入到内部电极中，使得相位在两个区域之间偏移90度时，杆被旋转。 当杆的顶端被偏压以被弹簧设置成使其被按压到用于引导透镜的滑动框架的轴的侧面时，透镜通过杆的旋转沿着轴滑动。

    PIEZOELECTRIC PORCELAIN COMPOSITION
    7.
    发明申请
    PIEZOELECTRIC PORCELAIN COMPOSITION 有权
    压电陶瓷组合物

    公开(公告)号：US20130313467A1

    公开(公告)日：2013-11-28

    申请号：US13813891

    申请日：2011-07-26

    申请人： Yutaka Doshida

    发明人： Yutaka Doshida

    IPC分类号： H01L41/187

    CPC分类号： H01L41/1871 ,  C04B35/495 ,  C04B35/62685 ,  C04B2235/3201 ,  C04B2235/3208 ,  C04B2235/3213 ,  C04B2235/3217 ,  C04B2235/3255 ,  C04B2235/3262 ,  C04B2235/3418 ,  C04B2235/76 ,  C04B2235/80 ,  C04B2235/81 ,  H01L41/43

    摘要： Provided is a Sr2-xCaxNaNb5O15 type piezoelectric ceramic composition wherein the inhibition of cracking and an improvement in the piezoelectric characteristics are attained by improving the composition uniformity and the microstructure uniformity. In the basic Sr2-xCaxNaNb5O15 composition, the (Sr, Ca)/Na ratio is changed, whereby the occupancies of Sr, Ca and Na in lattices which constitute the tungsten-bronze type structure and into which Sr, Ca, and Na can enter are reduced to facilitate the entrance of Sr into the lattices and thus inhibit the formation of a secondary phase. Further, a predetermined amount of Al and/or Si is added to lower the sintering temperature and to make the microstructure uniform. Additionally, a predetermined amount of Mn is added to make the polarization easy.

    摘要翻译： 提供一种Sr2-xCaxNaNb5O15型压电陶瓷组合物，其中通过改善组分均匀性和微结构均匀性来获得抑制裂纹和改善压电特性。 在Sr2-xCaxNaNb5O15基本组成中，（Sr，Ca）/ Na比例变化，构成钨青铜型结构的晶格中的Sr，Ca，Na占Sr，Ca，Na可以进入 被还原以促进Sr进入晶格并因此抑制第二相的形成。 此外，加入预定量的Al和/或Si以降低烧结温度并使微结构均匀。 另外，加入预定量的Mn以使极化容易。

    Driving device
    8.
    发明授权
    Driving device 失效
    驱动装置

    公开(公告)号：US07656073B2

    公开(公告)日：2010-02-02

    申请号：US11271676

    申请日：2005-11-10

    申请人： Yutaka Doshida ,  Hiroshi Kishi ,  Masafumi Tsukada ,  Katsuei Ishida

    发明人： Yutaka Doshida ,  Hiroshi Kishi ,  Masafumi Tsukada ,  Katsuei Ishida

    IPC分类号： H01L41/08

    CPC分类号： H02N2/025 ,  G02B3/12 ,  G02B3/14 ,  H01L41/0973

    摘要： A driving device, small in size and light in weight, is to stabilize the position of a surface-deforming element while reducing the effect of gravity thus enabling stable transfer and positioning. The driving device is structured to hold a movable member integrated with a piezoelectric vibrator and a lens by a shaft provided at a tip of a spring extended from an inner surface to center of a passageway. The shaft extends through an opening formed in a protrusion of the movable member. By a tensile force of the spring, the movable member at its outer periphery is pulled radially and held. When applying a voltage with a waveform changing sharply to the piezoelectric vibrator, the movable member flexes maximally upward or downward to have a reduced diameter and an increasing acceleration thereby making a movement. Then, when a frictional force increases, the protrusion is held at a point where the movable member moves. Because of being held by a tensile force, the effect of gravity decreases and hence the movable member is stabilized in position relative to a direction of transfer.

    摘要翻译： 体积小，重量轻的驱动装置是为了稳定表面变形元件的位置，同时减少重力的影响，从而实现稳定的转移和定位。 驱动装置构造成通过设置在从通道的内表面到中心延伸的弹簧的尖端处的轴来保持与压电振动器和透镜一体化的可移动部件。 轴穿过形成在可动构件的突起中的开口。 通过弹簧的张力，可动件在其外周被径向拉伸并保持。 当施加具有波形变化的电压到压电振动器时，可动构件最大程度地向上或向下弯曲以具有减小的直径和增加的加速度，从而进行移动。 然后，当摩擦力增加时，突起被保持在可移动部件移动的点。 由于被张力保持，重力的作用减小，因此可动构件相对于传送方向稳定在适当位置。

    Driving device
    9.
    发明申请
    Driving device 失效
    驱动装置

    公开(公告)号：US20060119218A1

    公开(公告)日：2006-06-08

    申请号：US11271676

    申请日：2005-11-10

    申请人： Yutaka Doshida ,  Hiroshi Kishi ,  Masafumi Tsukada ,  Katsuei Ishida

    发明人： Yutaka Doshida ,  Hiroshi Kishi ,  Masafumi Tsukada ,  Katsuei Ishida

    IPC分类号： H02N2/00

    CPC分类号： H02N2/025 ,  G02B3/12 ,  G02B3/14 ,  H01L41/0973

    摘要： A driving device, small in size and light in weight, is to stabilize the position of a surface-deforming element while reducing the effect of gravity thus enabling stable transfer and positioning. The driving device is structured to hold a movable member integrated with a piezoelectric vibrator and a lens by a shaft provided at a tip of a spring extended from an inner surface to center of a passageway. The shaft extends through an opening formed in a protrusion of the movable member. By a tensile force of the spring, the movable member at its outer periphery is pulled radially and held. When applying a voltage with a waveform changing sharply to the piezoelectric vibrator, the movable member flexes maximally upward or downward to have a reduced diameter and an increasing acceleration thereby making a movement. Then, when a frictional force increases, the protrusion is held at a point where the movable member moves. Because of being held by a tensile force, the effect of gravity decreases and hence the movable member is stabilized in position relative to a direction of transfer.

    摘要翻译： 体积小，重量轻的驱动装置是为了稳定表面变形元件的位置，同时减少重力的影响，从而实现稳定的转移和定位。 驱动装置构造成通过设置在从通道的内表面到中心延伸的弹簧的尖端处的轴来保持与压电振动器和透镜一体化的可移动部件。 轴穿过形成在可动构件的突起中的开口。 通过弹簧的张力，可动件在其外周被径向拉伸并保持。 当施加具有波形变化的电压到压电振动器时，可动构件最大程度地向上或向下弯曲以具有减小的直径和增加的加速度，从而进行移动。 然后，当摩擦力增加时，突起被保持在可移动部件移动的点。 由于被张力保持，重力的作用减小，因此可动构件相对于传送方向稳定在适当位置。