公开(公告)号：WO2014208765A1

公开(公告)日：2014-12-31

申请号：PCT/JP2014/067297

申请日：2014-06-23

Applicant: CANON KABUSHIKI KAISHA

Inventor： IFUKU, Toshihiro ,  FURUTA, Tatsuo ,  TAKEDA, Kenichi ,  KOYAMA, Shinya ,  TANAKA, Hidenori ,  FUJITA, Satoshi

IPC: H01L41/047 ,  H02N2/16

CPC classification number: H02N2/163 ,  H01L41/0475 ,  H01L41/257 ,  H01L41/29 ,  H02N2/0085 ,  H02N2/14

Abstract: A vibration wave drive device (25) includes an annular piezoelectric element (20) including a piezoelectric material (1) and multiple electrodes provided sandwiching the piezoelectric material (1), the annular piezoelectric element being configured to vibrate by a traveling wave of a wavelength λ; and a power feeding member (8) including at least electric wire (8a) for supplying electric power to the element (20), the feeding member (8) being provided to a first surface of the element (20). The element (20) includes at least two driving regions (15, 16), and a non-driving region (17) arranged between two of the at least two driving regions and has an average annular length of nλ/4, n being an odd number. At least one electrode provided on the first surface is arranged across the region (15, 16) and the region (17), and is electrically connected to the feeding member (8) only in the region (17).

Abstract translation: 振动波驱动装置（25）包括：压电材料（1）的环形压电元件（20）和夹着压电材料（1）的多个电极，所述环形压电元件被构造成通过波长的行波 λ; 以及至少包括用于向元件（20）供电的电线（8a）的送电构件（8），所述供给构件（8）设置在所述元件（20）的第一表面。 元件（20）包括至少两个驱动区域（15,16）和布置在至少两个驱动区域中的两个之间的非驱动区域（17），并且平均环形长度为nλ/ 4，n为 奇数。 设置在第一表面上的至少一个电极跨越区域（15,16）和区域（17）布置，并且仅在区域（17）中电连接到馈送构件（8）。

公开(公告)号：WO2014104378A1

公开(公告)日：2014-07-03

申请号：PCT/JP2013/085293

申请日：2013-12-19

Applicant: CANON KABUSHIKI KAISHA

Inventor： IFUKU, Toshihiro ,  FURUTA, Tatsuo ,  SAITO, Hiroshi ,  KUBOTA, Makoto ,  FUJITA, Satoshi

IPC: H01L41/257

CPC classification number: H01L41/257 ,  H01L41/047 ,  H01L41/1871 ,  H01L41/29 ,  H02N2/14 ,  H02N2/163 ,  Y10T29/43

Abstract: The present invention provides a piezoelectric element that includes a piezoelectric material having first and second surfaces; a common electrode disposed on the first surface; and a plurality of drive phase electrodes, a detection phase electrode, and a non-drive phase electrode disposed on the second surface, the piezoelectric material being sandwiched between the common electrode and the electrodes on the second surface. An absolute value d(1) of a piezoelectric constant of the piezoelectric material (1) in portions sandwiched between the drive phase electrodes and the common electrode, an absolute value d(2) of a piezoelectric constant of the piezoelectric material (2) in a portion sandwiched between the detection phase electrode and the common electrode, and an absolute value d(3) of the piezoelectric material (3) in a portion sandwiched between the non-drive phase electrode and the common electrode satisfy d(2)

Abstract translation: 本发明提供一种压电元件，其包括具有第一表面和第二表面的压电材料; 设置在所述第一表面上的公共电极; 以及多个驱动相电极，检测相电极和设置在第二表面上的非驱动相电极，压电材料夹在公共电极和第二表面上的电极之间。 压电材料（1）的压电常数在驱动相电极和公共电极之间的部分中的绝对值d（1），压电材料（2）的压电常数的绝对值d（2） 夹在非驱动相电极和公共电极之间的部分中夹在检测相电极和公共电极之间的部分和压电材料（3）的绝对值d（3）满足d（2）<0.95 d（1），d（3）<0.95d（1），0.9≤d（3）/ d（2）≤1.1。