Title:
PIEZOELECTRIC VIBRATOR FOR VIBRATION WAVE MOTOR
Document Type and Number:
WIPO Patent Application WO/2018/123819
Kind Code:
A1
Abstract:
A vibrator made of non-lead-based piezoelectric material is disclosed, capable of being driven at sufficient speed with low power consumption, particularly for vibration wave motors, which includes a piezoelectric element (101) comprising a piezoelectric material (3) with electrodes (1, 2) and an elastic body (5), wherein less than 1000 ppm of a Pb component is contained in the piezoelectric material, and vibration modes A and B, having resonance frequencies fA and fB, generating vibration waves in the elastic body with wave fronts intersecting each other, satisfy |fB - fA| > 2 kHz, preferably a (Ba,Ca)(Ti,Zr)O3 based rectangular vibrator with two out-of-plane bending modes having perpendicular nodal lines.
More Like This:
| JPS60264261 | APPARATUS FOR DRIVING PRINTING WIRE |
| JPH0382380 | ULTRASONIC MOTOR |
Inventors:
FURUTA TATSUO (JP)
WATANABE TAKAYUKI (JP)
UEDA MIKI (JP)
KOYAMA SHINYA (JP)
KUBOTA MAKOTO (JP)
MATSUDA TAKANORI (JP)
UEBAYASHI AKIRA (JP)
HAYASHI JUMPEI (JP)
NISHITANI HITOSHI (JP)
WATANABE TAKAYUKI (JP)
UEDA MIKI (JP)
KOYAMA SHINYA (JP)
KUBOTA MAKOTO (JP)
MATSUDA TAKANORI (JP)
UEBAYASHI AKIRA (JP)
HAYASHI JUMPEI (JP)
NISHITANI HITOSHI (JP)
Application Number:
PCT/JP2017/045990
Publication Date:
July 05, 2018
Filing Date:
December 21, 2017
Export Citation:
Assignee:
CANON KK (JP)
International Classes:
H02N2/00; H01L41/187; G02B7/10
Domestic Patent References:
| WO2013005701A1 | 2013-01-10 | |||
| WO2017164413A1 | 2017-09-28 |
Foreign References:
| US20060175929A1 | 2006-08-10 | |||
| EP1075079A1 | 2001-02-07 | |||
| US20120146459A1 | 2012-06-14 | |||
| US20110291525A1 | 2011-12-01 | |||
| JP2012231622A | 2012-11-22 | |||
| JP2009215111A | 2009-09-24 |
Other References:
JIN J ET AL: "A linear ultrasonic motor using (K0.5Na0.5)NbO3 based lead-free piezoelectric ceramics", SENSORS AND ACTUATORS A, vol. 165, no. 2, 9 November 2010 (2010-11-09), pages 410 - 414, XP028357857, ISSN: 0924-4247, [retrieved on 20101109], DOI: 10.1016/J.SNA.2010.10.017
IWANAMI SHOTEN, IWANAMI'S DICTIONARY OF PHYSICS AND CHEMISTRY 5-TH EDITION, 20 February 1998 (1998-02-20)
IWANAMI SHOTEN, IWANAMI'S DICTIONARY OF PHYSICS AND CHEMISTRY 5-TH EDITION, 20 February 1998 (1998-02-20)
Attorney, Agent or Firm:
ABE TAKUMA et al. (JP)
Download PDF:
Previous Patent: STRETCHABLE MEMBER WITH METAL FOIL
Next Patent: METHOD FOR FORMING PROTRUSION AND MACHINE
Next Patent: METHOD FOR FORMING PROTRUSION AND MACHINE