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.

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.