Patent ID: 8675453

Claim:
Backlash-compensating mechanism for a timepiece movement, comprising a cam ( 39 ), an actuating member ( 28 ) bearing against the cam ( 39 ) and a wheel ( 33 ) coaxial to the cam ( 39 ) and intended to be driven by a gear train ( 2 ) of the movement, the cam ( 39 ) and the wheel ( 33 ) being connected to each other such that one revolution of the wheel ( 33 ) comprises a sequence of a first phase in which the wheel ( 33 ) drives the cam ( 39 ) whilst the co-operation between the cam ( 39 ) and the actuating member ( 28 ) cocks the latter, a second phase in which the actuating member ( 28 ) uncocks and causes the cam ( 39 ) to effect an instantaneous jump, and a third phase in which the cam ( 39 ) is immobilised and the wheel ( 33 ) continues to advance until it catches up with the cam ( 39 ) to once again drive it during the first phase of the following revolution, characterised in that it further comprises resilient means ( 54 ) acting between the cam ( 39 ) and the wheel ( 33 ) and applying a return torque to the wheel ( 33 ) during the third phase.