A regulating member (1) for a horological movement including an inertial mass, for example a balance (23), a balance spring (25), a balance bridge (22), and an index system (20) for adjusting the rate of the balance spring (25), the index system (20) including a stud-holder (31) including a first stud (34) on which the balance spring (25) is mounted. The balance bridge (33) includes a second stud on which the balance spring (25) is also mounted, the stud-holder (31) being rotatable relative to the balance bridge (33) in order to adjust the rate of the regulating member (1).

A regulating member (1) for a horological movement including an inertial mass, for example a balance (23), a balance spring (25), a balance cock (22), and an actuation system (20) for adjusting the rate of the balance spring (25), the balance spring (25) including a coiled ribbon (2) and device (30) for adjusting the stiffness of the balance spring, which device is provided with a resilient element (5) arranged in series with the coiled ribbon (2), the adjustment device (30) including a pre-stress device (6) for applying a variable force or torque to the flexible element (5), the actuation system (20) including an eccentric actuating the pre-stress device (6) of the adjustment device (30).

A regulating member (1) for a horological movement including an inertial mass, for example a balance (23), a balance spring (25), a balance cock (22), and an actuation system (20) for adjusting the rate of the balance spring (25), the balance spring (25) including a coiled ribbon (2) and device (30) for adjusting the stiffness of the balance spring, which device is provided with a resilient element (5) arranged in series with the coiled ribbon (2), the adjustment device (30) including a pre-stress device (6) for applying a variable force or torque to the flexible element (5), the actuation system (20) including an eccentric actuating the pre-stress device (6) of the adjustment device (30).

A stud-holder for a regulating member (150) of a horological movement, the regulating member (150) including an inertial mass, for example a balance (41), a balance spring (44) including a strip wound about itself in several turns, and a balance cock (42), the stud-holder (120) including a main body (2) intended to be mounted on the balance cock (42), and a secondary body (3) arranged at a distance from the main body (2) and configured to suspend the balance spring (44), the regulating member (150) including a flexible element (5) connecting the main body (2) to the secondary body (3), the stud-holder (120) including prestressing device (6) for applying a variable force or torque to the flexible element (5) in order to adjust the rate and/or isochronism slope of the regulating member (150).

A stud-holder for a regulating member (150) of a horological movement, the regulating member (150) including an inertial mass, for example a balance (41), a balance spring (44) including a strip wound about itself in several turns, and a balance cock (42), the stud-holder (120) including a main body (2) intended to be mounted on the balance cock (42), and a secondary body (3) arranged at a distance from the main body (2) and configured to suspend the balance spring (44), the regulating member (150) including a flexible element (5) connecting the main body (2) to the secondary body (3), the stud-holder (120) including prestressing device (6) for applying a variable force or torque to the flexible element (5) in order to adjust the rate and/or isochronism slope of the regulating member (150).

A horological assembly for a horological regulating member, including a balance spring (25) having a coiled flexible strip (2); a device for adjusting its rigidity which includes a flexible element (5) arranged in series with the strip and connecting one end (4) of said strip to a rigid support (17), the flexible element having a rigidity greater than that of the strip. The adjustment device includes a pre-stressing device (6) for applying a variable force or torque to the flexible element to vary the rigidity of the flexible element. A stud-holder (1) is configured to suspend the balance spring and includes a main body (30) connected to the flexible element, and a secondary body (33) connected to the pre-stressing device, the secondary body (33) being movable relative to the main body (30) and being connected to the main body by a flexure bearing (20).

A horological assembly for a horological regulating member, including a balance spring (25) having a coiled flexible strip (2); a device for adjusting its rigidity which includes a flexible element (5) arranged in series with the strip and connecting one end (4) of said strip to a rigid support (17), the flexible element having a rigidity greater than that of the strip. The adjustment device includes a pre-stressing device (6) for applying a variable force or torque to the flexible element to vary the rigidity of the flexible element. A stud-holder (1) is configured to suspend the balance spring and includes a main body (30) connected to the flexible element, and a secondary body (33) connected to the pre-stressing device, the secondary body (33) being movable relative to the main body (30) and being connected to the main body by a flexure bearing (20).