公开(公告)号：US20140241134A1

公开(公告)日：2014-08-28

申请号：US14185131

申请日：2014-02-20

Applicant: SEIKO INSTRUMENTS INC.

Inventor： Takashi NIWA ,  Masahiro NAKAJIMA ,  Takuma KAWAUCHIYA ,  Hisashi FUJIEDA ,  Manabu SHINKE

IPC: G04B17/22 ,  G04B17/06

CPC classification number: G04B17/222 ,  G04B17/063 ,  G04B17/20 ,  G04B17/22 ,  Y10T29/49579

Abstract: 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.

Abstract translation: 温度补偿型平衡包括平衡人员和平衡轮，所述平衡轮具有多个双金属部分，所述双金属部分围绕所述平衡工作人员的旋转轴O在周向方向彼此平行地设置，并且连接构件连接所述多个 双金属部分和平衡工作人员。 双金属部分是第一部件和第二部件径向重合的层叠体，圆周方向的一个端部是连接到连接部件的固定端部，另一个端部部分在圆周方向上是自由端 。 第一构件由陶瓷材料形成，第二构件由具有与第一构件的热膨胀系数不同的热膨胀系数的金属材料形成。