公开(公告)号：US10291154B2

公开(公告)日：2019-05-14

申请号：US15164120

申请日：2016-05-25

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Seishiro Goto ,  Megumi Otsuka ,  Junichi Nomura ,  Koichi Hayashi

IPC: H02N2/00 ,  H02N2/02 ,  G02B7/08 ,  H01L41/04 ,  H01L41/053 ,  H01L41/09

Abstract: A driving device that causes a movable body to move stably with minimal backward movement. The driving device includes a plate-shaped driving unit with an elastic body and a piezoelectric element joined to a main surface of the elastic body. Moreover, the movable body is disposed into a cavity of the elastic body and is moved by being pitch fed when the driving unit is driven. The driving unit vibrates with flexural vibration and one more other vibration modes or with vibration of a coupled mode in which the flexural vibration and the other vibration mode are coupled with each other.

公开(公告)号：US11730060B2

公开(公告)日：2023-08-15

申请号：US16941705

申请日：2020-07-29

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Yoshiyuki Yamakawa ,  Seishiro Goto ,  Shinichiro Kawada ,  Shigetoshi Hayashi ,  Akio Fujita ,  Yusuke Nakamura

IPC: H10N30/853 ,  H10N30/50 ,  H10N30/87

CPC classification number: H10N30/8536 ,  H10N30/50 ,  H10N30/872

Abstract: A piezoelectric actuator that includes a multilayer body, a low-potential outer electrode, and a high-potential outer electrode. The multilayer body includes multiple alternately stacked piezoelectric ceramic layers and planar electrodes. The planar electrodes include low-potential planar electrodes electrically connected to the low-potential outer electrode and high-potential planar electrodes electrically connected to the high-potential outer electrode. The planar electrode positioned most outwardly on the side of a first main surface of the multilayer body is a low-potential planar electrode. The inner surface of this low-potential planar electrode contacts the − side of polarization in an active region, and the outer surface of this low-potential planar electrode is exposed on an outside of the multilayer body. On the side of a second main surface of the multilayer body, a high-potential planar electrode is not exposed on the outside of the multilayer body.

公开(公告)号：US20160268928A1

公开(公告)日：2016-09-15

申请号：US15164120

申请日：2016-05-25

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Seishiro Goto ,  Megumi Otsuka ,  Junichi Nomura ,  Koichi Hayashi

IPC: H02N2/00 ,  H01L41/09 ,  H01L41/04 ,  H01L41/053

CPC classification number: H02N2/001 ,  G02B7/08 ,  H01L41/042 ,  H01L41/053 ,  H01L41/09 ,  H02N2/0015 ,  H02N2/003 ,  H02N2/026

Abstract: A driving device that causes a movable body to move stably with minimal backward movement. The driving device includes a plate-shaped driving unit with an elastic body and a piezoelectric element joined to a main surface of the elastic body. Moreover, the movable body is disposed into a cavity of the elastic body and is moved by being pitch fed when the driving unit is driven. The driving unit vibrates with flexural vibration and one more other vibration modes or with vibration of a coupled mode in which the flexural vibration and the other vibration mode are coupled with each other.

Abstract translation: 一种使可移动体以最小的向后运动稳定地移动的驱动装置。 驱动装置包括具有弹性体的板状驱动单元和与弹性体的主表面接合的压电元件。 此外，可移动体设置在弹性体的空腔中，并且当驱动单元被驱动时通过俯仰进给而移动。 驱动单元通过弯曲振动和另一种其它振动模式或耦合模式的振动而振动，其中弯曲振动和其它振动模式彼此耦合。