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TEMPERATURE COMPENSATION-TYPE BALANCE, TIMEPIECE MOVEMENT, MECHANICAL TIMEPIECE AND MANUFACTURING METHOD OF TEMPERATURE COMPENSATION-TYPE BALANCE
TEMPERATURE COMPENSATION-TYPE BALANCE, TIMEPIECE MOVEMENT, MECHANICAL TIMEPIECE AND MANUFACTURING METHOD OF TEMPERATURE COMPENSATION-TYPE BALANCE
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机译:温度补偿型平衡,时间运动,机械时间及温度补偿型平衡的制造方法
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摘要
A temperature compensation-type balance includes a balance staff, and a balance wheel that has a plurality of bimetal portions which are disposed in parallel to each other in a circumferential direction around a rotational axle O of the balance staff and connection members which connect the plurality of bimetal portions and the balance staff. The bimetal portion is a layered body in which a first member and a second member are radially overlapped, and one end portion in the circumferential direction is a fixed end connected to the connection member and the other end portion in the circumferential direction is a free end. The first member is formed of a ceramic material, and the second member is formed of a metal material having a thermal expansion coefficient different from that of the first member.
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