Speed regulating mechanism for timepiece movement, timepiece movement and timepiece

Abstract

The utility model relates to a speed regulating mechanism (1) used for a clock movement, the speed regulating mechanism comprises an inertia mass body such as a balance wheel (23), a balance spring (25) and a balance clamping plate (22), and a fast and slow pointer system (20) used for regulating the travel time difference of the speed regulating mechanism, the fast and slow pointer system (20) comprises an outer pile retaining piece (31), the outer pile retaining piece comprises a first outer pile (34), and the first outer pile (34) is connected with the first outer pile (34). The balance spring (25) is mounted on the first outer pile, and the speed regulating mechanism is characterized in that the balance plate (33) comprises a second outer pile, the balance spring (25) is also mounted on the second outer pile, and the outer pile retaining part (31) can rotate relative to the balance plate (33) so as to adjust the travel time difference of the speed regulating mechanism (1). The utility model also relates to a clock movement comprising the speed regulating mechanism, and a clock comprising the clock movement.

Description

Field of the Invention

[0001] The present invention relates to the field of watchmaking, and more particularly to the field of mechanical watchmaking, in which the regulation of the driving energy is provided by a regulating mechanism. More specifically, the present invention relates to a regulating mechanism provided with an accurate index system, a watch movement comprising such a regulating mechanism, and a watch comprising such a watch movement. Background Art

[0002] In most mechanical watches, the energy required to rotate the hands (e.g., the minute hand and the hour hand) is stored in a barrel and then transmitted by a balance-spring system, which includes a flywheel called a balance wheel combined with a spring in the form of a helically wound strip called a balance spring.

[0003] The inner end of the balance spring is attached to a balance staff that rotates integrally with the balance wheel; the outer end of the balance spring is attached to an outer stud mounted on an outer stud holder, which is itself rigidly connected to a stationary bridge plate.

[0004] The rotation of the balance wheel is maintained by an escapement mechanism, and its oscillations are counted by the escapement mechanism, which includes an escapement fork that performs a low-amplitude oscillatory movement and is provided with two pallets that engage with the teeth of an escape wheel. When the escape wheel is engaged in this way, it causes the escape wheel to rotate in steps, the rotational frequency of which is determined by the oscillation frequency of the escapement fork, the oscillation frequency of which is itself set to the oscillation frequency of the balance-spring system.

[0005] In a traditional escapement mechanism, the oscillation frequency is approximately 4 Hz, or approximately 28,800 vibrations per hour (V / h). One of the goals of an excellent watchmaker is to ensure the isochronism and regularity of the balance wheel oscillations (or the constancy of the rate error).

[0006] The rate of the balance wheel can be adjusted in a known manner by adjusting the effective length of the balance spring, which is defined as the curved length between the inner end of the balance spring and the counting point, which is located near the outer end of the balance spring and is usually defined by a pair of stops carried by a key mounted on an index system.

[0007] In operation, the index system cannot rotate about the axis of the balance spring. However, its angular position can be adjusted by manual intervention, for example, by using a screwdriver to pivot an eccentric acting like a cam on the index system.

[0008] The assembly including the bridge plate, the index system, the key, the outer stud holder, the outer stud, the balance staff, the balance spring, and the balance wheel is generally referred to as a "regulating mechanism". Examples of regulating mechanisms are given in European Patent EP-3304215 and European Patent EP-2876504, both of which were filed by watchmaker ETA.

[0009] For some hairspring systems, the outer end of the hairspring is attached to its outer stud holder, and the key of the hairspring system has a play to allow the hairspring to move between two stops. However, the timing characteristics, especially the non-isochronism, are very sensitive to the play at the hairspring key, and it is very difficult to precisely control such play.

[0010] In some devices, these stops can be adjusted to clamp the hairspring in order to eliminate the play, especially when the hairspring is running. In this case, the rate error is first adjusted by moving the hairspring key, and then the hairspring is clamped to the key. However, clamping the hairspring to the hairspring key may stress the hairspring and generate a timing error, especially due to the off-center winding. Moreover, eliminating the play also changes the rate error, and once the hairspring is clamped, it is no longer possible to move the hairspring key along the hairspring to fine-tune the rate error.

[0011] Other hairsprings have an integrated speed regulation device. In these hairsprings, the rate error is not adjusted by changing the effective length of the hairspring, but by applying a force or torque to a flexible element arranged in series with the hairspring. In this way, the stiffness of the flexible element can be changed, and thus the overall stiffness of the hairspring can be changed. By adjusting the stiffness of the hairspring, the rate error of the speed regulation mechanism can be adjusted. For example, such a hairspring provided with a flexible element is described in patent application EP4009115.

[0012] However, in these cases, the usual hairspring systems cannot be used because they are not compatible with the hairspring speed regulation device. Moreover, since the rate error must be adjusted with a very high degree of precision, it is important that there is no play between the hairspring and the area where it interacts with the hairspring regulating mechanism. More specifically, if this is not the case, the rate error may change in the event of an impact if the hairspring does not reposition itself in exactly the same way. Summary of the Utility Model

[0013] The object of the present utility model is to overcome some or all of the above-mentioned drawbacks by providing a hairspring system compatible with such regulating devices.

[0014] To this end, the present utility model relates to a speed regulation mechanism for a watch movement, which mechanism includes an inertial mass body such as a balance wheel, a hairspring, a balance cock, and a hairspring system for adjusting the rate error of the speed regulation mechanism, the hairspring system including an outer stud holder which includes a first outer stud, and the hairspring is mounted on the first outer stud.

[0015] The present utility model is characterized in that the balance cock includes a second outer stud, and the hairspring is also mounted on the second outer stud, and the outer stud holder can rotate relative to the balance cock in order to adjust the rate error of the speed regulation mechanism.

[0016] Thanks to the present utility model, by simply changing the position of the outer stud retainer, the time difference of the speed regulation mechanism can be adjusted, because this will change the position of the first outer stud relative to the second outer stud, while the second outer stud remains fixed relative to the movement plate. Since the hairspring is carried by two outer studs, the stiffness of the hairspring will change. Since the position of the second outer stud has not changed, the guiding mark remains unchanged.

[0017] In a specific embodiment of the present utility model, the index regulator system includes a return spring that applies an expansion force / return force between the outer stud retainer and the balance cock.

[0018] In a specific embodiment of the present utility model, the outer stud retainer and the spring are integral and preferably made of the same material.

[0019] In a specific embodiment of the present utility model, the index regulator system includes a rotatable cam that cooperates with the outer stud retainer to rotate the outer stud retainer.

[0020] In a specific embodiment of the present utility model, the outer stud retainer includes an arm that contacts the cam so that the outer stud retainer can be rotated.

[0021] In a specific embodiment of the present utility model, the hairspring includes a wound strip and an adjusting device for adjusting the stiffness of the hairspring. The adjusting device is provided with a flexible element arranged in series with the wound strip, and the second outer stud is mechanically connected to the flexible element.

[0022] In a specific embodiment of the present utility model, the flexible element is connected to a rigid support, and the second outer stud is integral with the rigid support.

[0023] In a specific embodiment of the present utility model, the adjusting device includes a prestressing device for applying a variable force or torque to the flexible element, and the first outer stud is mechanically connected to the prestressing device.

[0024] In a specific embodiment of the present utility model, the flexible element and the prestressing device are arranged between the first outer stud and the second outer stud. The first outer stud can move relative to the second outer stud to actuate the prestressing device, and the displacement of the first outer stud relative to the second outer stud changes the stiffness of the hairspring.

[0025] In a specific embodiment of the present utility model, the prestressing device includes a rod connected to the flexible element, and the first outer stud is integral with the free end of the rod.

[0026] In a specific embodiment of the present utility model, the prestressing device includes a rigid structure arranged in parallel with the flexible element, and the rod is connected to the rigid structure.

[0027] In a specific embodiment of the present utility model, a flexible element is connected to a rigid support, and a second outer stud is integrated with the rigid support.

[0028] In a specific embodiment of the present utility model, an outer stud holder is arranged on a balance bridge around a bearing on a balance staff.

[0029] The present utility model also relates to a timepiece movement including such a speed regulating mechanism.

[0030] The present utility model also relates to a timepiece including such a timepiece movement, such as a wristwatch. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] After reading several embodiments given with reference to the accompanying drawings, the objectives, advantages and features of the present utility model will become apparent. These embodiments are provided for illustrative purposes only and are not intended to limit the scope of the present utility model. In the drawings:

[0032] - Figure 1 A perspective top view of a speed regulating mechanism according to a first embodiment of the present utility model is schematically shown.

[0033] - Figure 2 Is schematically shown Figure 1 A perspective top view of a partial exploded view of the first embodiment of the speed regulating mechanism in

[0034] - Figure 3 A top view of a hairspring of a speed regulating mechanism according to the present utility model is schematically shown.

[0035] - Figure 4 Is schematically shown Figure 1 A perspective bottom view of a partial exploded view of the first embodiment of the speed regulating mechanism shown in

[0036] - Figure 5 Is schematically shown Figure 1 A bottom view of the first embodiment of the speed regulating mechanism shown in

[0037] - Figure 6 A perspective top view of a partial view of a speed regulating mechanism according to a second embodiment of the present utility model is schematically shown.

[0038] - Figure 7 Is schematically shown Figure 6 A partial enlarged view of a part of the second embodiment of the speed regulating mechanism shown in, and

[0039] - Figure 8 Is schematically shown Figure 6 A perspective top view of an outer stud holder of the second embodiment of the speed regulating mechanism shown in. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0040] Figures 1 to 5 FIG. 1 schematically shows a first embodiment of a speed regulating mechanism 1 intended to be arranged in a watch movement not shown in the figures. Such a watch movement includes, for example, a mainplate provided with a recess for receiving the speed regulating mechanism 1, the speed regulating mechanism 1 being provided with an inertial mass and an elastic restoring element for the inertial mass, the elastic restoring element being configured to oscillate the inertial mass.

[0041] The speed regulating mechanism 1 further includes a regulator system 20, an annular balance wheel 23 as the inertial mass, a balance staff 24, a hairspring 25 as the elastic restoring element, and a balance cock 22.

[0042] In Figures 1 to 3 , the balance wheel 23, the hairspring 25, the balance cock 22 and the regulator system 20 are stacked, in this example from bottom to top.

[0043] The balance staff 24 is located at the center and passes through the centers of the balance wheel 23, the hairspring 25 and the balance cock 22. The balance staff 24 is held by two shock-resistant bearings 28, which are arranged at the two ends of the balance staff 24. A first bearing (not shown in the figures) is arranged below the balance wheel 23 and the balance cock 22, and the second bearing 28 is held by the balance cock 22. The balance cock 22 is provided with a hole, in this example a through-hole, in which the second bearing 28 is held. The regulator system 20 is mounted on the balance cock 22, and in this embodiment, the regulator system 20 is arranged along the central axis of the balance staff 24.

[0044] Figure 3 FIG. 2 shows an example of a hairspring 25, which preferably extends substantially in a plane. The hairspring 25 includes a flexible strip 2 wound around itself several times, the strip 2 having a predetermined stiffness. The inner end 9 of the strip 2 is integral with or assembled to a support 3, which is generally referred to as an inner collet. The support 3 is generally triangular and is passed through by the balance staff 24.

[0045] The hairspring 25 further includes an adjusting device for adjusting its stiffness. For example, when the speed regulating mechanism is mounted on the mainplate of a watch movement, the adjusting device can be actuated in particular by an operator.

[0046] The adjusting device includes a flexible element 5 arranged in series with the strip 2, the flexible element 5 connecting one end 4 of the strip 2 to a rigid support 17 and being integral with one end 4 of the strip 2. The flexible element 5 is integral with the outer end 4 of the strip 2. The flexible element 5 is an element distinct from the strip 2.

[0047] The flexible element 5 adds additional stiffness to the strip 2. The flexible element 5 is preferably stiffer than the strip 2. In this example, the flexible element 5 is arranged as an extension of the strip 2. Preferably, the adjusting device is integral with the strip 2 or even made of the same material (such as silicon).

[0048] The flexible element 5 of the hairspring 25 includes a pivot having non-crossing flexible blades. The pivot includes two non-crossing flexible blades 11, 12 and a rigid part 18. The flexible blades 11, 12 are connected laterally to a rigid support 17 on one hand and to the rigid part 18 by converging towards each other on the other hand. Thus, the flexible blades 11, 12 preferably extend away from the rigid part 18 all the way to the rigid support 17. The outer end 4 of the strip 2 is connected to the rigid part 18. The rigid support 17 is fixed relative to the movement plate. The rigid support 17 is L-shaped, and the first leg 46 of the L serves as a connecting piece for the flexible blades 11, 12, and the second leg 47 of the L faces away from the pivot with non-crossing blades so that it can be assembled to the watch movement.

[0049] The device for adjusting the hairspring 25 further includes a prestressing device 6 for applying a variable force or torque to the flexible element 5. In this way, the stiffness of the hairspring can be adjusted. Due to the prestressing device 6, it is possible to continuously adjust the torque or force. In other words, the torque or force is not limited to isolated values. Therefore, the stiffness of the flexible element 5 can be adjusted very precisely.

[0050] The prestressing device 6 includes a secondary flexible blade 19 which is arranged on the opposite side of the rigid part 18 in the extension of the pivot with non-crossing blades. The secondary flexible blade 19 is arranged at the outer end 4 and is tangent to the strip 2.

[0051] The other end of the secondary flexible blade 19 is connected to a bent rod 14 which extends around the strip 2. In addition to the secondary flexible blade 19, the rod 14 is also connected to a rigid structure 27 which is attached to the rigid support 17. When the rod 14 is actuated by a force or torque, the rigid structure 27 undergoes partial deformation.

[0052] The force or torque is applied to the free end 15 of the rod 14. In this way, the rod 14 of the prestressing device 6 transmits the force or torque to the flexible element 5 via the secondary flexible blade 19 and the rigid structure 27 in order to modify the stiffness of the hairspring 25.

[0053] In Figure 1 and Figure 2 , the hairspring 25 has different configurations. The non-crossing blades 11, 12, the rigid part 18 and the secondary flexible blade 19 are replaced by a single blade to which the outer end 4 of the rod 14 is attached.

[0054] In order to be able to apply a variable force or torque to the hairspring 25, the speed regulation mechanism includes a regulator system 20.

[0055] In Figure 1 , 2、In the first embodiment shown in FIGS. 4 and 5, the regulator system 20 is fitted with an outer stud holder 31 provided with a first outer stud 34.

[0056] According to the present invention, the balance cock 22 is provided with a second outer stud 35. The outer stud holder 31 is mechanically connected to the rod 14 of the prestressing device 6, but it does not obstruct the strip 2.

[0057] The outer stud holder 31 is in contact with the balance cock 22 and is held and positioned by the shock absorber 28.

[0058] The outer stud holder 31 can rotate relative to the balance cock 22 about the balance axis, so that it can move the first outer stud 34 and act on the rod 14.

[0059] The outer stud holder 31 includes a central ring 38 disposed around the second bearing 28.

[0060] The outer stud holder 31 includes two projections 41, 42 radially extending from the central ring 38. The first projection 41 holds the first outer stud 34 downward by means of a first screw 74. The second projection 42 holds the second outer stud 35 downward by means of a second screw.

[0061] In a reference arrangement, the first outer stud 34 and the second outer stud 35 are arranged, for example, substantially symmetrically with respect to the balance axis 24.

[0062] The first outer stud 34 cooperates with the free end 15 of the rod 14, and the second outer stud 35 cooperates with the second leg 47 of the rigid support 17. Thus, the prestressing device 6 is supported by the regulator system 20, and the flexible element 5 is supported by the balance cock 22, and the flexible element 5 is suspended from the balance cock 22.

[0063] The two outer studs 34, 35 are arranged on both sides of the prestressing device 6 and the flexible element 5. In addition, the two outer studs 34, 35 are rigidly connected to the rod 14 and the rigid support 17. In other words, the first outer stud 34 is integral with the rod 14 through the free end 15, and the second outer stud 35 is integral with the rigid support 17 through the second leg 47. The assembly of these outer studs with the hairspring 25 is achieved, for example, by adhesion, brazing, welding, metallic glass deformation or mechanical fastening.

[0064] The first outer stud 34 can move relative to the second outer stud 35. For this purpose, the outer stud holder 31 can move relative to the balance cock 22. The outer stud holder 31 can rotate about the second bearing 28. Thus, the first outer stud 34 moves with the outer stud holder 31, and the first outer stud 34 can rotate about the second bearing 28. The first outer stud 34 can be displaced, for example, in an angular range of 20° or even 10°.

[0065] The displacement of the first outer stud 34 relative to the second outer stud 35 changes the stiffness of the flexible element 5 because this displacement exerts a greater or lesser force or torque on the rod 14 of the prestressing device 6, causing the stiffness of the flexible element 5 to change, and thus the stiffness of the entire hairspring 25 also changes. Therefore, the index regulator system 20 enables the adjustment of the timekeeping error of the speed regulating mechanism 1.

[0066] To this end, the index regulator system 20 allows the position of the first outer stud 34 relative to the second outer stud 35 to be changed. The outer stud holder 31 moves relative to the balance bridge 22, and as a result, the first outer stud 34 moves relative to the second outer stud 35 to change the force or torque applied to the prestressing device 6 of the hairspring 25.

[0067] The outer stud holder 31 of the index regulator system 20 includes an arm 63 that extends radially outward in a plane.

[0068] The index regulator system 20 includes a rotatable cam 55 disposed on the balance bridge 22. The cam 55 cooperates with the arm 63 of the outer stud holder 31 to cause the arm 63 to rotate about the second bearing 28. The end 56 of the arm 63 preferably always contacts the cam 55, such that the rotation of the cam 55 exerts a motion on the arm 63 according to the angular position of the cam 55. Therefore, the outer stud holder 31 of the index regulator system 20 rotates about the second bearing 28. This index regulator system 20 equipped with the cam 55 allows the stiffness of the hairspring 25 to vary linearly.

[0069] To keep the arm 63 of the outer stud holder 31 in contact with the cam 55, the index regulator system 20 includes a spring 57 that exerts a restoring force on the outer stud holder 31.

[0070] In Figure 4 it, the spring 57 is generally horseshoe-shaped. The first end 58 of the spring is connected to the balance bridge 22, and the second end 59 of the spring 57 surrounds the retaining outer stud 60 extending from the outer stud holder 31. The spring 57 is disposed in a hollow portion 61 formed in the lower balance bridge 22 on the side of the balance wheel 23 and the hairspring 25. The balance bridge 22 includes a through hole 62 leading to the hollow portion 61, and the retaining outer stud 60 extends through the through hole 62 into the hollow portion 61. The size of the through hole 62 is determined to allow the retaining outer stud 60 to move when the outer stud holder 31 rotates relative to the balance bridge 22.

[0071] Therefore, the spring 57 exerts a restoring force on the outer stud holder 31 of the index regulator system 20, and the function of this restoring force is to always keep the arm 63 of the outer stud holder in contact with the cam 55. When the cam 55 is acted upon, the outer stud holder 31 rotates to move the first outer stud 34 relative to the second outer stud 35, and at the same time is subjected to the restoring force exerted by the spring 57 to allow the arm 63 of the outer stud holder 31 to contact the cam 55, especially when the outer peripheral wall 64 of the cam 55 moves away from the arm 63.

[0072] The hairspring regulating system 20 is configured to adjust the rate difference of the speed regulating mechanism 1 with a resolution of less than or equal to 1 second per day, preferably less than or equal to 0.5 second per day, or even less than or equal to 0.1 second per day. The configuration of the speed regulating mechanism 1 allows for such precision to be achieved.

[0073] An adjustment mark 49 is also arranged on the cam 55. Thus, in order to adjust the hairspring regulating system 20, the cam 55 is moved, for example, by means of an adjustment knob (not shown in the figure), which is arranged on the cam 55 and can be rotated. Thus, the cam 55 is oriented according to a preferred guiding mark in order to adjust the hairspring regulating system 20.

[0074] Preferably, the adjustment mark 49 corresponds to the resolution. In other words, the difference between two consecutive guiding marks allows the rate difference to change by one second, 0.5 second or even 0.1 second per day. In Figure 6 it, the resolution of the adjustment mark 49 is 0.1 second.

[0075] Figures 6 to 8 A second embodiment of the speed regulating mechanism 40 according to the present utility model is schematically shown. In this embodiment, the outer stud holder 71 and the spring 72 are integral, preferably made of the same material. In all other respects, the speed regulating mechanism 40 is the same as the first embodiment.

[0076] The outer stud holder 71 includes a single projection 81 that carries the first outer stud 34. The outer stud holder 71 includes the spring 72 instead of a second projection.

[0077] The spring 72 is elongate and extends from the ring 77 of the outer stud holder 71 on the side opposite to the arm 81. The spring 72 is U-shaped and, when the outer stud holder 71 is installed in the speed regulating mechanism 40, the spring 72 abuts against the balance staff plate 52. The first end 75 of the U-shape is integral with the ring 77 of the outer stud holder 71, while the second end 76 is free.

[0078] The second end 76 is inserted into a hole in the balance staff plate 52. The second free end 76 includes, for example, a bent portion 79 for hooking the hole. Thus, the second end 76 of the spring 72 is supported in the hole, thereby locking the spring 72 on this side.

[0079] Therefore, when the outer stud holder 71 rotates under the action of the movement of the cam 55, the spring 72 is more or less stressed and exerts a restoring force on the outer stud holder 71 to keep the arm 63 abutted against the cam 55, regardless of its position.

[0080] Optionally, the second free end 76 can be wedged against the edge 78 of the balance staff plate 52.

[0081] Except for these differences, the speed control mechanism 40 of the second embodiment has the same features as the first embodiment, particularly with respect to the cam 55, the first outer stud 34 and the second outer stud 35, and the hairspring 25.

[0082] This outer stud holder 71 makes it easier to assemble into the speed control mechanism because only one component needs to be arranged on the balance cock. Since a single component replaces two components, storage is also simplified.

[0083] It goes without saying that the present utility model is not limited to the embodiments of the speed control mechanism described with reference to the accompanying drawings, and alternative solutions can be considered without departing from the scope of the present utility model.

Claims

1. A speed regulation mechanism for a clock movement, the speed regulation mechanism comprising a balance wheel (23) as an inertial mass body, a hairspring (25), a balance cock (22), and a regulator system (20) for adjusting the time difference of the speed regulation mechanism. The regulator system (20) comprises an outer stud holder, the outer stud holder comprising a first outer stud (34), and the hairspring (25) is mounted on the first outer stud. It is characterized in that, The balance bridge includes a second stud (35), and the hairspring (25) is also mounted on the second stud. The stud holder can rotate relative to the balance bridge so as to adjust the time difference of the speed regulating mechanism.

2. The speed regulating mechanism for a watch movement according to claim 1, characterized in that, The hairspring (25) includes a wound strip (2) and an adjusting device for adjusting the stiffness of the hairspring. The adjusting device is provided with a flexible element (5) arranged in series with the wound strip (2), and the second stud (35) is mechanically connected to the flexible element (5).

3. The speed regulating mechanism for a watch movement according to claim 2, characterized in that, The adjusting device includes a prestressing device (6) for applying a variable force or torque to the flexible element (5), and the first stud (34) is mechanically connected to the prestressing device (6).

4. The speed control mechanism for a watch movement according to claim 3, characterized in that, The flexible element (5) and the prestressing device (6) are arranged between the first stud (34) and the second stud (35). The first stud (34) can move relative to the second stud (35) to actuate the prestressing device (6), and the displacement of the first stud (34) relative to the second stud (35) changes the stiffness of the hairspring (25).

5. The speed regulation mechanism for a watch movement according to claim 4, characterized in that, The prestressing device (6) includes a rod (14) connected to the flexible element (5), and the first stud is integral with the free end (15) of the rod (14).

6. The speed regulating mechanism for a watch movement according to claim 5, characterized in that, The prestressing device (6) includes a rigid structure arranged in parallel with the flexible element (5), and the rod (14) is connected to the rigid structure.

7. The speed regulating mechanism for a watch movement according to any one of claims 2 to 6, characterized in that, The flexible element (5) is connected to a rigid support (17), and the second stud (35) is integral with the rigid support (17).

8. The speed regulation mechanism for a watch movement according to any one of claims 1 to 6, characterized in that, The index regulator system includes a rotatable cam (55), and the cam (55) cooperates with the stud holder to rotate the stud holder.

9. The speed regulating mechanism for a watch movement according to claim 8, characterized in that, The stud holder includes an arm (63) in contact with the cam so as to be able to rotate the stud holder.

10. The speed regulation mechanism for a watch movement according to any one of claims 1 to 6, characterized in that, The index regulator system includes a return spring that applies an expanding force between the stud holder and the balance bridge.

11. The speed regulating mechanism for a watch movement according to claim 10, characterized in that, The stud holder and the return spring are integral.

12. The speed control mechanism for a watch movement according to any one of claims 1 to 6, characterized in that, The stud holder is arranged on the balance bridge around a bearing (28) on the balance axis (24) of the balance wheel.

13. A clock movement, characterized in that, The timepiece movement includes a speed regulating mechanism for a timepiece movement according to any one of the preceding claims 1-12.

14. A clock, characterized in that, The timepiece includes a timepiece movement according to claim 13.

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