Timepiece movement comprising a device for equalising a motor torque

A timepiece movement comprising:

• a mechanism;
• a spring barrel configured to drive the mechanism by means of a kinematic linkage being configured to exert a driving torque on the mechanism, the spring barrel including a motor spring configured to allow the spring barrel to exert a motor torque;
• and
• an equalization device connected kinematically to the spring barrel and driven by the spring barrel and exert an auxiliary torque being added to the motor torque and form together the driving torque, the auxiliary torque varying as a function of a degree of winding-up of the motor spring and counter a variation in the motor torque caused by the motor spring and equalize the driving torque within a useful range of a degree of winding-up,
• wherein the equalization device includes
• a magnetic system including a first magnetic element and a second magnetic element, the first and second magnetic elements being displaced from each other by exerting a magnetic force to each other when the equalization device is driven by the spring barrel, the magnetic force varying as a function of a relative position occupied by the first magnetic element and the second magnetic element and produces the auxiliary torque, and
• an auxiliary reducing wheel work configured to operate in kinematic linkage with the spring barrel, the auxiliary reducing wheel work including a wheel, the wheel bearing the first magnetic element or the second magnetic element and being configured to effect less than one rotation while the spring barrel effects a plurality of rotations between a completely wound-up state of the motor spring and a completely unwound state of the motor spring.

A timepiece movement comprising:

• a mechanism;
• a spring barrel configured to drive the mechanism by a kinematic linkage being configured to exert a driving torque on the mechanism, the spring barrel including a motor spring configured to allow the spring barrel to exert a motor torque;
• and
• an equalization device connected kinematically to the spring barrel and driven by the spring barrel and exert an auxiliary torque being added to the motor torque and form together the driving torque, the auxiliary torque varying as a function of a degree of winding-up of the motor spring and counter a variation in the motor torque caused by the motor spring and equalize the driving torque within a useful range of a degree of winding-up,
• wherein the equalization device includes a magnetic system including a first magnetic element and a second magnetic element,
• wherein when the equalization device is driven by the spring barrel, the first and second magnetic elements being displaced from each other by exerting a magnetic force to each other, the magnetic force varying as a function of a relative position occupied by the first magnetic element and the second magnetic element and produces the auxiliary torque, and
• wherein the motor torque and the auxiliary torque exerted by the equalization device have a same direction.