TEMPERATURE-COMPENSATED BALANCE, TIMEPIECE MOVEMENT, MECHANICAL TIMEPIECE, AND METHOD OF MANUFACTURING TEMPERATURE-COMPENSATED BALANCE

摘要

PROBLEM TO BE SOLVED: To provide a temperature-compensated balance which is superior in shape accuracy, allows temperature compensation work to be stably performed as planned, is difficult to rust, and can be efficiently manufactured while being applied with excess external force (stress).;SOLUTION: A temperature-compensated balance 40 includes: a balance staff 41 and a balance wheel 42 which has a plurality of bimetal parts 50 juxtaposed in a circumferential direction around an axis O of turning of the balance staff and connection members 51 connecting respective bimetal parts 50 and the balance staff. Each bimetal part 50 is a laminate where a first member 60 and a second member 61 different by thermal expansion coefficients are laminated in a radial direction, and one end part in the circumferential direction of the bimetal part 50 is a fixed end 50A connected to the connection member, and the other end in the circumferential direction is a free end 50B. The first member is formed of a ceramic material, and the second member is formed of a metal material different in thermal expansion coefficient from the first member.;COPYRIGHT: (C)2014,JPO&INPIT