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:
Aug. 03, 2021
Filed:
Nov. 16, 2017
The University of Tokyo, Tokyo, JP;
National University Corporation Shizuoka University, Shizuoka, JP;
Saginomiya Seisakusho, Inc., Tokyo, JP;
Hiroshi Toshiyoshi, Tokyo, JP;
Gen Hashiguchi, Hamamatsu, JP;
Hiroyuki Mitsuya, Sayama, JP;
Hiroshi Imamoto, Tokyo, JP;
The University of Tokyo, Tokyo, JP;
National University Corporation Shizuoka University, Shizuoka, JP;
Saginomiya Seisakusho, Inc., Tokyo, JP;
Abstract
Provided is an electrostatic-type vibrational energy harvester device that makes it possible to efficiently rectify and charge power from low acceleration to high acceleration of vibrational energy applied from the exterior. The vibrational energy harvester device is provided with: a movable part capable of vibrating in a vibration direction as a result of mechanical vibrational energy, said movable part being provided with a first surface along the vibration direction; and a fixed part provided with a second surface facing the first surface of the movable part with a gap therebetween so that it is possible for the movable part to vibrate in the vibration direction. A plurality of recessed portions and protruding sections are formed in an alternating manner in the vibration direction on the surfaces of each of the first surface of the movable part and the second surface of the fixed part. An electret film is formed on at least one of the fixed part and the movable part. The vibrational energy harvester device is configured so that a force factor (electromechanical conversion factor) having a value that corresponds to the gap between the first surface of the movable part and the second surface of the fixed part becomes small when the vibration amplitude of the movable part is small and large when the vibration amplitude of the movable part is large.