Nikko Company

Ishikawa Prefecture

Tokyo Institute of Technology

Takashi Yoshida

Mikio Takimoto

Masahiro Takano

Kenichi Hirosaki

Kentaro Nakamura

Yuta Yoshida

Takuya Nagata

Hiroshi Kawai

Shou Makino

Satoru Ichimura

Masayuki Ishida

Electrodes (), having curved sections in the shape of the outline thereof, are disposed in areas of a rectangular plate-shaped piezoelectric transducer element () in which the strain in the natural mode of vibration is large. The electrodes () which excite a bending vibration are disposed in areas in which the strain in the bending natural mode is at least a predetermined value, and the outline curved sections of the electrodes () are shaped so as to follow along strain contours (), and the electrode () which excites a stretching vibration is disposed in an area in which the strain in the stretching natural mode is at least a predetermined value, thus providing a transducer for an ultrasonic motor which aims to reduce transducer loss (increasing vibration efficiency), and improve transducer durability and reliability.

Transducer for ultrasonic motor

A holding device for a piezoelectric vibrator including a support member () for separately accommodating a piezoelectric vibrator (), a first plate spring member () which extends from a proximal end fixedly bonded to one side of the support member () so as to sandwich opposing sides of the piezoelectric vibrator () and is folded back to be fixedly bonded to the piezoelectric vibrator, and a second plate spring member () which extends from a proximal end fixedly bonded to another side of the support member () so as to sandwich the opposing sides of the piezoelectric vibrator () and is folded back to be fixedly bonded to the piezoelectric vibrator. The first plate spring member () and the second plate spring member () are integrated at portions fixedly bonded to the piezoelectric vibrator ().

Apparatus for holding piezoelectric vibrator

Growing community of inventors

Hakusan, Japan

Takashi Yoshida