The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 30, 2019
Filed:
May. 31, 2016
Canon Kabushiki Kaisha, Tokyo, JP;
Yasumichi Arimitsu, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
In a vibration actuator suitable for use in a magnetic field environment, vibration is excited in a vibration element in pressure contact with a driven element, so as to cause relative movement of the driven element and the vibration element. The vibration element includes an elastic body, of which a main ingredient is electrically insulating, dielectric, or semi-conductive, and an electromechanical energy conversion element. A first electrode having an open loop structure is provided on a surface of a piezoelectric body of the electromechanical energy conversion element, through which surface the piezoelectric body is joined to the elastic body. Second electrodes are provided on the piezoelectric body in a manner opposed to the first electrode via the piezoelectric body. A conduction path electrically connects the first electrode and at least one of the second electrodes. A gap is formed between each of adjacent second electrodes.