公开(公告)号：US11563386B2

公开(公告)日：2023-01-24

申请号：US16980832

申请日：2018-10-05

Applicant: CITIZEN WATCH CO., LTD.

Inventor： Tomoo Ikeda ,  Izumi Yamamoto ,  Takuya Shirai ,  Yudai Hoshi

IPC: H02N1/08 ,  H02N1/00 ,  B81B3/00

Abstract: Provided are an electromechanical transducer including a light movable member that is easy to move and charged portions whose amount of electrostatic charge does not substantially change over time and a method for manufacturing such an electromechanical transducer. The electromechanical transducer using electrostatic interaction between a charged portion and a counter electrode to perform transduction between electric power and motive power includes a fixed substrate, a movable member being movable with a predetermined distance maintained between the fixed substrate and the movable member, the movable member having grooves in a surface facing the fixed substrate, the grooves being formed at intervals in a moving direction of the movable member, charged portions formed on the surface of the movable member so as to alternate with the grooves; counter electrodes disposed on a surface of the fixed substrate in the moving direction, the surface facing the movable member, and a cover layer containing copper and covering at least side walls of the movable member inside the grooves.

公开(公告)号：US11042124B2

公开(公告)日：2021-06-22

申请号：US15533463

申请日：2015-12-11

Applicant: CITIZEN WATCH CO., LTD.

Inventor： Tomoo Ikeda

IPC: G04B17/06 ,  G04B15/14 ,  G04B31/06 ,  C25D13/12 ,  G04B13/02 ,  G04B13/00 ,  G04B17/08

Abstract: By configuring a timepiece component to include an intermediate film provided on at least a portion of a surface of a base material formed by using a nonconductive first material as a main component and to include a buffer film stacked on the intermediate film and mainly composed of a second material having a tenacity higher than that of the first material, the timepiece component may be manufactured with high precision, the weight thereof may be reduced, and even when the base material is formed by using a brittle material such as silicon, the timepiece component becomes resistant to breakage and capable of exhibiting high strength when an impact is externally applied.

公开(公告)号：US10370769B2

公开(公告)日：2019-08-06

申请号：US15533694

申请日：2015-12-11

Applicant: CITIZEN WATCH CO., LTD.

Inventor： Yosuke Abe ,  Tomoo Ikeda ,  Ryoichi Shima ,  Yoshiki Ono ,  Taku Asami ,  Yosuke Sasaki

IPC: C25D1/22 ,  C25D1/08 ,  G04B15/14 ,  C25D1/00 ,  C25D1/20 ,  G03F7/09 ,  G03F7/095 ,  H01L21/288 ,  G04B13/02 ,  G04B17/06 ,  G03F7/00 ,  G03F7/40 ,  G04D3/00

Abstract: In manufacturing of a first electroformed component and a second electroformed component having portions fitted to each other into close contact, after the first electroformed component is formed, the first electroformed component is used as a portion of an electroforming mold to form the second electroformed component. Using the first electroformed component as a portion of the electroforming mold to form the second electroformed component, the shape of the first electroformed component is transferred to the second electroformed component. As a result, multiple types of components differing in shape may be accurately manufactured concurrently in a series of manufacturing steps.

公开(公告)号：US10274897B2

公开(公告)日：2019-04-30

申请号：US15736695

申请日：2016-06-01

Applicant: CITIZEN WATCH CO., LTD.

Inventor： Tomoo Ikeda ,  Yusaku Niida ,  Yosuke Abe

IPC: G04B17/22 ,  G04B17/06

Abstract: A governor includes a balance spring including a base member made of silicon, for example, and a balance wheel. The balance spring includes a coating film of DLC that is applied to a surface of the silicon base member to improve the strength of the balance spring. A spring constant of the balance spring changes in accordance with the temperature change. A moment of inertia of the balance wheel changes in accordance with the temperature change. A change in an oscillation period due to the temperature change is suppressed by the change in the spring constant of the balance spring and by the change in the moment of inertia of the balance wheel.

公开(公告)号：US20180150030A1

公开(公告)日：2018-05-31

申请号：US15736695

申请日：2016-06-01

Applicant: CITIZEN WATCH CO., LTD.

Inventor： Tomoo Ikeda ,  Yusaku Niida ,  Yosuke Abe

IPC: G04B17/22 ,  G04B17/06

CPC classification number: G04B17/222 ,  G04B17/063 ,  G04B17/066

Abstract: A governor includes a balance spring including a base member made of silicon, for example, and a balance wheel. The balance spring includes a coating film of DLC that is applied to a surface of the silicon base member to improve the strength of the balance spring. A spring constant of the balance spring changes in accordance with the temperature change. A moment of inertia of the balance wheel changes in accordance with the temperature change. A change in an oscillation period due to the temperature change is suppressed by the change in the spring constant of the balance spring and by the change in the moment of inertia of the balance wheel.