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Title:
VIBRATION TYPE ACTUATOR, LENS DRIVING DEVICE, OPTICAL INSTRUMENT, AND ELECTRONIC APPARATUS
Document Type and Number:
Japanese Patent JP2018101094
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To drive a lens group at an equal speed irrespective of the direction of movement without changing driving conditions for a vibration type actuator according to the direction of movement of the lens group.SOLUTION: In a vibration type actuator 1 comprising a vibrator 11 and a driven body 12, the vibrator 11 includes a plate-like elastic body 112, projection parts 112a and 112b provided on one face of the elastic body 112 and in contact with the driven body 12, and a piezoelectric element 111 adhered to the other face of the elastic body 112. Driving vibration includes a vibration mode having a nodal line substantially parallel to a direction orthogonal to both the thickness direction of the elastic body 112 and a relative direction of movement between the vibrator 11 and driven body 12; the projection parts 112a and 112b are provided at positions shifted in the direction of movement by a predetermined distance from the position of the nodal line when the driving vibration is excited.SELECTED DRAWING: Figure 2

Inventors:
HAMAMOTO MAI
Application Number:
JP2016247817A
Publication Date:
June 28, 2018
Filing Date:
December 21, 2016
Export Citation:
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Assignee:
CANON KK
International Classes:
G02B7/04; H02N2/04
Attorney, Agent or Firm:
別役 重尚