Title:
VIBRATION TYPE ACTUATOR, OPTICAL INSTRUMENT AND IMAGING APPARATUS
Document Type and Number:
Japanese Patent JP2016054578
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To make separation of an elastic member from a piezoelectric element hardly occur in a vibration type actuator using a vibrator obtained by sticking the piezoelectric element and the elastic member together.SOLUTION: An ultrasonic motor 1 comprises: a vibrator 11 obtained by sticking a piezoelectric element 111 and an elastic member 112 together; a driven member 12 which is relatively driven with respect to the vibrator 11; and a pressurization member 13 which presses the vibrator 11 to the driven member 12. An elastic vibration part 112a vibrates with the piezoelectric element 111, and a pressurized part 112c extends in a D1 direction from the elastic vibration part 112a and receives pressurization force applied by the pressurization member 13. A vibrator holder 14 holds the vibrator 11 via the pressurization member 13. When seen from a direction orthogonal to the D1 direction and the pressurization direction (D2 direction), since a portion connected to the pressurization member 13 in the vibrator holder 14 is formed in a direction different from the D1 direction as an inclined part 14a, the moment acting in a direction reverse to a direction of separating the elastic member 112 from the piezoelectric element 111 is given in advance.SELECTED DRAWING: Figure 1
Inventors:
OSAWA KAZUHARU
Application Number:
JP2014178680A
Publication Date:
April 14, 2016
Filing Date:
September 03, 2014
Export Citation:
Assignee:
CANON KK
International Classes:
H02N2/00; G02B7/04; H01L41/09
Attorney, Agent or Firm:
Ryoichi Takaoka