Niterra Co., Ltd.

The University of Tokyo

Takashi Kasashima

Ryo Suzuki

Shinsuke Itoh

Satoshi Suzuki

Takeshi Morita

Hirotoshi Yoshizaki

Shoki Ieiri

Asuka Tsujii

Toshihito Sonobe

Kota Yokoyama

Yuichiro Hanawa

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.

Ultrasonic wave generation device

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

Ultrasonic transducer

Growing community of inventors

Nagoya, Japan

Takashi Kasashima