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:
Jun. 28, 2022
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;
Saginomiva Seisakusho, Inc., Tokyo, JP;
Abstract
The present invention enables frequency response in a wide band without lowering the Q value. This vibrational energy harvester device is provided with: a movable part capable of vibration in a vibration direction as a result of mechanical vibrational energy applied from the exterior, 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 an interval therebetween, said fixed part being configured so as to be positionally fixed even against vibrational energy. A plurality of projections protruding in a direction orthogonal to the vibration direction are formed so as to be arranged like comb teeth in the vibration direction on 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 the first surface of the fixed part or on at least the second surface of the movable part. The vibrational energy harvester device is configured so that the spring rate of the movable part is modulated as a function of the position of the vibration direction by electrostatic force acting between the movable part and the fixed part.