Title:
VIBRATOR FOR ULTRASONIC MOTOR
Document Type and Number:
Japanese Patent JPH01144372
Kind Code:
A
Abstract:
PURPOSE:To increase speed and driving force by adding an elastic plate to the ends of a piezoelectric ceramic plate and providing integrally an elastic substance having a different distribution of mass in the direction of thickness from the elastic plate. CONSTITUTION:An ultrasonic motor is equipped with a stainless steel elastic plate 21 and an elastic substance 24, a PZT piezoelectric ceramic plate 22 and an electrode 23, and the static compressive stress bias is applied to the piezoelectric ceramic plate 22. A thin paper 27 is put on the top of the elastic substance 24, and the pressure welding of the paper 27 is made by means of a stainless steel roller 26. Accordingly, when AC field of 25kHz is applied to the piezoelectric ceramic plate 22 from the electrode 23, the roller 26 rotates in the direction of the arrow 28, and the paper 27 can be moved in the direction of the arrow 29.
Inventors:
ONISHI OSAMU
MYOGA OSAMU
INOUE TAKESHI
TAKAHASHI SADAYUKI
UCHIKAWA TADAYASU
MYOGA OSAMU
INOUE TAKESHI
TAKAHASHI SADAYUKI
UCHIKAWA TADAYASU
Application Number:
JP30352587A
Publication Date:
June 06, 1989
Filing Date:
November 30, 1987
Export Citation:
Assignee:
NEC CORP
International Classes:
H02N2/00; (IPC1-7): H02N2/00
Domestic Patent References:
| JPS59230472A | 1984-12-25 | |||
| JPS60109776A | 1985-06-15 | |||
| JPS60200776A | 1985-10-11 |
Attorney, Agent or Firm:
Naoki Kyomoto (2 outside)