Title:
超音波モータ用振動子
Document Type and Number:
Japanese Patent JP4830165
Kind Code:
B2
Abstract:
Electrodes (7, 8, 9), having curved sections in the shape of the outline thereof, are disposed in areas of a rectangular plate-shaped piezoelectric transducer element (1) in which the strain in the natural mode of vibration is large. The eletrodes (7, 8) 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 (7, 8) are shaped so as to follow along strain contours (3, 4), and the electrode (9) 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.
Inventors:
Masahiro Takano
Kenichi Hirosaki
Yuta Yoshida
Takuya Nagata
Sho Makino
Satoru Ichimura
Takashi Yoshida
Masayuki Ishida
Hiroshi Kawai
Mikio Takimoto
Kentaro Nakamura
Kenichi Hirosaki
Yuta Yoshida
Takuya Nagata
Sho Makino
Satoru Ichimura
Takashi Yoshida
Masayuki Ishida
Hiroshi Kawai
Mikio Takimoto
Kentaro Nakamura
Application Number:
JP2010015216A
Publication Date:
December 07, 2011
Filing Date:
January 27, 2010
Export Citation:
Assignee:
Ishikawa Prefecture
Sigma Optical Co., Ltd.
Nikko Ceramics Co., Ltd.
National University Corporation Tokyo Institute of Technology
Sigma Optical Co., Ltd.
Nikko Ceramics Co., Ltd.
National University Corporation Tokyo Institute of Technology
International Classes:
H02N2/00; H01L41/09
Domestic Patent References:
| JP20104625A | ||||
| JP200728862A | ||||
| JP200854407A | ||||
| JP241673A | ||||
| JP2004297951A |
Attorney, Agent or Firm:
Kunihisa Landlord
Atsushi Hayashi
Atsushi Hayashi