公开(公告)号：US10566913B2

公开(公告)日：2020-02-18

申请号：US15129422

申请日：2015-03-19

Applicant: CITIZEN HOLDINGS CO., LTD. ,  CITIZEN WATCH CO., LTD.

Inventor： Kensaku Matsumoto ,  Takashi Ihara ,  Makoto Watanabe ,  Akira Izumi

IPC: H02N1/08 ,  F03G7/08 ,  G04C10/00

Abstract: Provided is an electric power generating device capable of performing electret power generation by efficiently rotating a rotating electrode group. The electric power generating device includes: a plurality of electret electrodes each made of an electret material and formed into a planar shape, and arranged in a circular shape at intervals in a first plane; a plurality of counter electrodes arranged in a circular shape in a second plane facing the first plane so as to face the plurality of electret electrodes; an oscillating weight supported in a rotatable manner; and a motive power transmission mechanism configured to transmit motive power generated by rotations of the oscillating weight to a rotating electrode group including any one of the plurality of electret electrodes and the plurality of counter electrodes, to thereby rotate the rotating electrode group so that the rotating electrode group is moved relative to another electrode group, the motive power transmission mechanism including a clutch mechanism configured to transmit only a rotation of the oscillating weight in one predetermined direction.

公开(公告)号：US10222761B2

公开(公告)日：2019-03-05

申请号：US15505354

申请日：2015-08-13

Applicant: CITIZEN WATCH CO., LTD.

Inventor： Takashi Ihara ,  Akira Izumi ,  Makoto Watanabe

IPC: G04C10/00 ,  G04G19/00 ,  H02N1/08 ,  G04C10/02

Abstract: An electronic watch or clock with an electrostatic induction generator, wherein the electrostatic induction generator has a rotary weight able to rotate with respect to a housing, a rotary member able to rotate with respect to the housing, a counter substrate fastened to the housing, a charging film arranged at one of the rotary member and counter substrate, and a counter electrode arranged facing the charging film at the other, outputs electric power generated between the charging film and the counter electrode to a quartz movement, and provides a window part at one or more locations among the dial plate, housing, or outside casing to enable rotation of the rotary member or transmission of rotation to be visually confirmed.

公开(公告)号：US11101748B2

公开(公告)日：2021-08-24

申请号：US16667895

申请日：2019-10-29

Applicant: CITIZEN WATCH CO., LTD.

Inventor： Toshinari Maeda ,  Makoto Watanabe ,  Yasuo Kitajima ,  Izumi Yamamoto

IPC: H02N1/08 ,  H02N1/00 ,  G04C10/00

Abstract: Provided is a method of manufacturing an electrostatic induction transducer, the method including: providing a conductive substrate; providing a first electret material film on a first surface of the conductive substrate; providing a second electret material film on a second surface of the conductive substrate; forming a through hole that penetrates the conductive substrate, the first electret material film, and the second electret material film; mounting a supported member being conductive to the conductive substrate while allowing the conductive substrate to move in an in-plane direction; and applying charges to the first electret material film and the second electret material film by a charging process.

公开(公告)号：US10348219B2

公开(公告)日：2019-07-09

申请号：US15128847

申请日：2015-02-27

Applicant: CITIZEN WATCH CO., LTD.

Inventor： Akira Izumi ,  Takashi Ihara ,  Makoto Watanabe

IPC: H02N1/08

Abstract: A board arrangement structure includes a housing, a first board fastened to the housing, a second board arranged in parallel enabling, relative movement with respect to the first board, an electrically charged film, a counter electrode, and an output part outputting electric power generated between the electrically charged film and the counter electrode, at least one of the electrically charged film and the counter electrode being arranged at a first facing surface of the first board and the other being arranged at a second facing surface of the second board facing the first facing surface, and the first facing surface of the first board being, fastened to a reference mounting surface provided at the housing.

公开(公告)号：US11226593B2

公开(公告)日：2022-01-18

申请号：US16496473

申请日：2018-03-28

Applicant: CITIZEN WATCH CO., LTD.

Inventor： Makoto Watanabe ,  Katsuyoshi Aihara ,  Daisuke Matsuoh ,  Daisuke Yamada ,  Ryutaro Uemura

IPC: G04C9/00 ,  G04B19/04

Abstract: An analog electronic watch includes watch's internal time, and controls rotation of a group of indicators based on the watch's internal time. A terminal appliance stops the rotation of the group of indicators, generates an image of the indicators and the dial plate with an imaging unit, detects current display positions of the group of indicators in identification areas as part of the image of the indicators and the dial plate, generates current display time information based on the current display positions, and generates display time correction information based on a difference between the current display time information and the watch's internal time information. The analog electronic watch corrects the display positions of the group of indicators based on the display time correction information. There are provided an analog electronic watch system and an analog electronic watch that can reduce a time required for display time correction.

公开(公告)号：US10361642B2

公开(公告)日：2019-07-23

申请号：US15300780

申请日：2015-03-26

Applicant: CITIZEN HOLDINGS CO., LTD. ,  CITIZEN WATCH CO., LTD.

Inventor： Kensaku Matsumoto ,  Takashi Ihara ,  Makoto Watanabe ,  Akira Izumi

IPC: H02N1/08 ,  G04C10/00 ,  G04G19/00

Abstract: Provided is an electronic device including a rotary power generation device using an electret, which is capable of preventing a spiral spring from being wound up or fully extended. The electronic device includes a power generation mechanism including: first rotary member, which is supported in a freely rotatable manner, and has a center of gravity shifted from a rotation center; second rotary member supported in a freely rotatable manner; an elastic member configured to elastically connect the first rotary member and the second rotary member to each other for rotary motions thereof; a stationary member arranged so as to be opposed to the second rotary member; and an electret film formed on a surface of any one of the second rotary member and the stationary member.