Timepiece movement escapement, return member for timepiece movement, timepiece movement and timepiece comprising such movement

The invention relates in particular to a return part of a balance (10) of a timepiece in place of a coil spring. The return member comprises a rack (21) provided with a sector tooth (22) arranged to engage with the balance pinion (20). The rack (21) comprises a rotating shaft (24) allowing the rack (21) to move between two extreme positions separated by a rest position, referred to as a working position. The return member further comprises two springs (26) arranged to urge the rack (21) towards its rest position. Each spring (26) is formed by an elastic strip (27) arranged to store energy and subsequently recover the energy for the rack. And each elastic strip works alternately, so that the elastic strips work asynchronously. The invention also relates to an escapement comprising such a return member, to a timepiece movement comprising such a return member and to a timepiece comprising such a movement. 本发明特别是涉及一种钟表的摆轮(10)的返回部件，以替代螺旋弹簧。该返回部件包括齿条(21)，其设置有被设置为与摆轮小齿轮(20)接合的扇形齿(22)。齿条(21)包括允许其在由静止位置分开的称为工作位置的两个极限位