公开(公告)号：EP2755093A2

公开(公告)日：2014-07-16

申请号：EP14151118.8

申请日：2014-01-14

申请人： Master Dynamic Limited

发明人： Chu, Siu Kay ,  Ching, Ho ,  Ko, Pui Hang

IPC分类号： G04B17/34

CPC分类号： G04B17/345

摘要： A hairspring collet for a hairspring for interference engagement and an interference fit with the cylindrical outer surface of the staff of a balance wheel for a timepiece movement, said hairspring collet portion comprising a plurality of circumferentially extending elastically deformable interconnected arm portions, the arm portions forming an annulus having a central axis and providing an aperture therebetween, wherein each arm portion including a curved concave engagement portion for engagement with the outer surface of a staff of a balance wheel, wherein each engagement portion has substantially the same radius of curvature as each other and are equally spaced from said central axis at a first distance and wherein said first distance is less than the radius of the staff of the balance wheel; said engagement portions have a radius of curvature such that upon deformation of the arm portions and engagement with the outer surface of said staff the engagement portions substantially conform with the outer surface of said staff and an interference fit is formed therebetween, wherein stress induced from said interference fit is transferred and distributed from along the engagement portions to the arm portions adjacent the engagement portions and distributed therein; and wherein the interference fit of the engagement portions with the staff substantially prevents relative movement between the hairspring collet and the staff of the balance wheel upon application of load from a hairspring in use in a timepiece movement.

摘要翻译： 一种用于干扰接合的游丝的游丝夹头和与用于钟表运动的摆轮的工作人员的圆柱形外表面的过盈配合，所述游丝夹头部分包括多个周向延伸的可弹性变形的互连臂部分，所述臂部分形成 具有中心轴线并在其间提供孔的环，其中每个臂部分包括用于与摆轮的工作人员的外表面接合的弯曲凹入接合部分，其中每个接合部分具有彼此基本相同的曲率半径 并且在第一距离处与所述中心轴线等距间隔，并且其中所述第一距离小于所述摆轮的所述工作人员的半径; 所述接合部分具有曲率半径，使得当臂部分变形并且与所述人员的外表面接合时，接合部分基本上与所述人员的外表面一致，并且在其间形成过盈配合，其中由所述 过盈配合从接合部分转移并分布到邻近接合部分的臂部分并分布在其中; 并且其中所述接合部分与所述人员的所述过盈配合基本上防止在使用手表运动中施加来自游丝的负载时，游丝夹头和摆轮的人员之间的相对运动。

公开(公告)号：EP2755093B1

公开(公告)日：2017-09-27

申请号：EP14151118.8

申请日：2014-01-14

申请人： Master Dynamic Limited

发明人： Chu, Siu Kay ,  Ching, Ho ,  Ko, Pui Hang

IPC分类号： G04B17/34

CPC分类号： G04B17/345

公开(公告)号：EP2755093A3

公开(公告)日：2015-09-23

申请号：EP14151118.8

申请日：2014-01-14

申请人： Master Dynamic Limited

发明人： Chu, Siu Kay ,  Ching, Ho ,  Ko, Pui Hang

IPC分类号： G04B17/34

CPC分类号： G04B17/345

摘要： A hairspring collet for a hairspring for interference engagement and an interference fit with the cylindrical outer surface of the staff of a balance wheel for a timepiece movement, said hairspring collet portion comprising a plurality of circumferentially extending elastically deformable interconnected arm portions, the arm portions forming an annulus having a central axis and providing an aperture therebetween, wherein each arm portion including a curved concave engagement portion for engagement with the outer surface of a staff of a balance wheel, wherein each engagement portion has substantially the same radius of curvature as each other and are equally spaced from said central axis at a first distance and wherein said first distance is less than the radius of the staff of the balance wheel; said engagement portions have a radius of curvature such that upon deformation of the arm portions and engagement with the outer surface of said staff the engagement portions substantially conform with the outer surface of said staff and an interference fit is formed therebetween, wherein stress induced from said interference fit is transferred and distributed from along the engagement portions to the arm portions adjacent the engagement portions and distributed therein; and wherein the interference fit of the engagement portions with the staff substantially prevents relative movement between the hairspring collet and the staff of the balance wheel upon application of load from a hairspring in use in a timepiece movement.