公开(公告)号：US20240317646A1

公开(公告)日：2024-09-26

申请号：US18578172

申请日：2022-05-24

Applicant: NITERRA CO., LTD.

Inventor： Yoshinobu HIROSE ,  Ryosuke KOBAYASHI ,  Takashi KASASHIMA ,  Masato YAMAZAKI

IPC: C04B35/49 ,  H10N30/853

CPC classification number: C04B35/49 ,  H10N30/8542 ,  C04B2235/3249 ,  C04B2235/3255 ,  C04B2235/768 ,  C04B2235/785 ,  C04B2235/786

Abstract: A lead-free piezoelectric ceramic composition which includes a primary phase formed of an alkali niobate-based perovskite oxide represented by a compositional formula (A1aM1b)c(Nbd1, Mnd2, M2d3)O3+e (in which element A1 represents at least one species among the alkali metals; element M1 represents at least one species among Ba, Ca, and Sr; element M2 represents at least one species of Ti and Zr; the following conditions: 0 1.0.

公开(公告)号：US20240307919A1

公开(公告)日：2024-09-19

申请号：US18576290

申请日：2022-08-09

Applicant: NITERRA CO., LTD.

Inventor： Toshihito SONOBE ,  Asuka TSUJII ,  Ryo SUZUKI ,  Yuichiro HANAWA ,  Shinsuke ITOH ,  Takashi KASASHIMA

IPC: B06B1/06

CPC classification number: B06B1/0648

Abstract: An ultrasonic transducer (1) includes a base portion (14), a piezoelectric element (11), a vibration plate (10), and a resonator (12). The resonator (12) is joined to a first surface (21) of the vibration plate (10). A surface, of the piezoelectric element (11), on a side opposite to a side on which the piezoelectric element is joined to the base portion (14), is joined to a second surface (22) of the vibration plate (10). A through-hole (30) is formed in the piezoelectric element (11) so as to penetrate therethrough in a thickness direction of the vibration plate (10). In a planar direction orthogonal to the thickness direction of the vibration plate (10), a joined portion (40) between the vibration plate (10) and the resonator (12) is located inward of a node (20) of vibration of the vibration plate (10), and the through-hole (30) is located inward of the node (20).

公开(公告)号：US20250046285A1

公开(公告)日：2025-02-06

申请号：US18718614

申请日：2023-02-16

Applicant: Nihon University ,  Niterra Co., Ltd.

Inventor： Hikaru MIURA ,  Ryota OHFUCHI ,  Takashi KASASHIMA ,  Hideaki TAKI

IPC: G10K9/122

Abstract: An ultrasonic projection device for projecting ultrasonic waves includes a first block body, a second block body, and a piezoelectric unit sandwiched between the first block body and the second block body. A vibration plate is provided at one end on the first block body side in the axial direction of the first block body, the second block body, and the piezoelectric unit. The dimension from the one end to the other end on the second block body side in the axial direction approximately coincides with half of the wavelength of vibration generated by the piezoelectric unit. A connection portion having a groove with a smooth inner wall surface which connects the vibration plate and a base portion is provided between the vibration plate and the base portion which supports the vibration plate.

公开(公告)号：US20240138812A1

公开(公告)日：2024-05-02

申请号：US18495163

申请日：2023-10-26

Applicant: Niterra Co., Ltd. ,  THE UNIVERSITY OF TOKYO

Inventor： Satoshi SUZUKI ,  Kota YOKOYAMA ,  Ryo SUZUKI ,  Shinsuke ITOH ,  Takashi KASASHIMA ,  Takeshi MORITA ,  Shoki IEIRI

IPC: A61B8/00

CPC classification number: A61B8/445 ,  A61B8/4483

Abstract: An ultrasonic wave generation device including: an ultrasonic wave generation source; an ultrasonic wave condensation part; and a waveguide. The ultrasonic wave condensation part has a first reflection surface opposed to the ultrasonic wave generation source and a second reflection surface opposed to the first reflection surface. The first reflection surface reflects the ultrasonic wave, generated from the ultrasonic wave generation source, toward the second reflection surface. The second reflection surface reflects the ultrasonic wave, which has been reflected by the first reflection surface, toward the waveguide so as to introduce the ultrasonic wave into the waveguide. The waveguide protrudes from the first reflection surface to a side opposite the second reflection surface. A recessed portion is formed from the first reflection surface to the second reflection surface side along an outer circumferential surface of the waveguide.

公开(公告)号：US20250033085A1

公开(公告)日：2025-01-30

申请号：US18716352

申请日：2022-11-21

Applicant: NITERRA CO., LTD.

Inventor： Shinsuke ITOH ,  Kota YOKOYAMA ,  Satoshi SUZUKI ,  Ryo SUZUKI ,  Takashi KASASHIMA

IPC: B06B3/00

Abstract: An ultrasonic wave converging part (12) and a waveguide (13) have a through-hole (20) penetrating the converging part and the waveguide in a front-rear direction. An inner circumferential surface (20A) forming the through-hole has inner circumferential surface (21) and deformed portion (23) located on a front-end side relative to the inner circumferential surface. The inner circumferential surface has, as a cross-sectional shape in the front-rear direction, a shape linearly extending in the front-rear direction. The deformed portion is, in a cross section in the front-rear direction, at least one of a portion located inward of the inner circumferential surface and a portion located outward of the inner circumferential surface (FIG. 1 showing the portion located inward of the first inner circumferential surface), and is formed in a part of or over an entire circumference (FIG. 1 showing the entire circumference) of the inner circumferential surface in a circumferential direction.

公开(公告)号：US20240310497A1

公开(公告)日：2024-09-19

申请号：US18271553

申请日：2022-08-09

Applicant: Niterra Co., Ltd.

Inventor： Yuichiro HANAWA ,  Asuka TSUJII ,  Ryo SUZUKI ,  Shinsuke ITOH ,  Takashi KASASHIMA ,  Toshihito SONOBE ,  Hirotoshi YOSHIZAKI

IPC: G01S7/521

CPC classification number: G01S7/521

Abstract: An ultrasonic transducer (1) including: a plurality of vibrators (11); and a connection portion (30) connecting the vibrators (11) to each other. Each of the vibrators (11) has a piezoelectric element (21) and a vibration plate (20) joined to the piezoelectric element (21). The connection portion (30) connects the vibration plates (20) to each other. A width (W2) of the connection portion (30) is smaller than a width (WI) of the vibration plate (20). In this configuration, the relative positional relationship among the vibrators (11) is easily stabilized.