Pin holder for timepiece adjustment member, provided with means for adjusting rate and / or isochronism

Abstract

The invention relates to a pin holder for an adjustment member (150) of a timepiece movement, the adjustment member (150) comprising: an inertial mass, such as a balance (41); a balance spring (44) including a bar wound around itself by several turns; the invention relates to a pin holder (120) comprising a main body (2) intended to be mounted on a balance plate (42), and a secondary body (3) arranged at a distance from the main body (2) and configured to suspend a balance spring (44), an adjustment member (150) comprising a flexible element (5) connecting the main body (2) to the secondary body (3), the pin holder (120) comprising a prestressing means (6), and a variable force or torque applying means for applying a variable force or torque to the flexible element (5) in order to adjust the rate and / or isochronous slope of the adjustment member (150).

Description

Field of the Invention

[0001] The present invention relates to the field of watchmaking, and more particularly to the field of mechanical watchmaking, where the regulation of the driving energy is provided by a regulating member.

[0002] The present invention more particularly relates to a stud holder for a watch regulating member, the watch regulating member being provided with means for regulating the rate and / or isochronism, and to a regulating member comprising such a stud holder, and to a watch movement comprising such a regulating member. Background Art

[0003] In most mechanical watches, the energy required to rotate the hands (e.g., the minute and hour hands) is stored in a barrel wheel and then delivered by a regulating mechanism system that includes a flywheel called a balance wheel, which is combined with a spring in the form of a helically wound strip called a balance spring.

[0004] The inner end of the balance spring is attached to an axis that rotates integrally with the balance wheel; the outer end of the balance spring is attached to a stud mounted on a stud holder, which is itself rigidly connected to a fixed bridge.

[0005] 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 lever excited by a low-amplitude oscillating movement and provided with two escapement forks that engage the teeth of an escape wheel. When the escape wheel is engaged in this way, it is caused to rotate step by step, the rotational frequency of which is determined by the oscillation frequency of the escapement lever, which is itself set to the oscillation frequency of the regulating mechanism.

[0006] In a conventional 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 (or constancy of the rate) of the oscillations of the regulating mechanism.

[0007] The rate of the balance spring can be adjusted in a known manner by adjusting the effective length of the balance spring, which is defined as the curved length between its inner end and the counting point, the counting point being located near the outer end of the balance spring and usually defined by a pair of lugs carried by a key mounted on a swan's neck regulator system.

[0008] In operation, the swan's neck regulator system cannot rotate about the axis of the balance spring. However, its angular position can be finely adjusted by manual intervention, for example by pivoting a cam-like eccentric device on the swan's neck regulator system using a screwdriver.

[0009] A component including a clamp, a hairspring regulating system, a key, a stud holder, a stud, a rod, a balance spring and a balance is generally referred to as a "regulating member". Examples of regulating members are given in both international patent WO 2016 / 192957 and European patent EP 2876504, both of which were filed by watch manufacturer ETA.

[0010] There are hairspring regulating systems with a stud holder to which one end of the balance spring is attached and at which there is play in the key of the hairspring regulating system to allow the balance spring to move between two stops. However, the precision timepiece properties, in particular the non-isochronism as a function of the amplitude, are very sensitive to the play at the hairspring key, and this play is difficult to control precisely.

[0011] In some devices, the stops can be adjusted to clamp the balance spring in order to eliminate the play, especially during the operation of the balance spring. In this case, the rate is adjusted first by moving the hairspring key and then clamping the spring to the key. However, clamping the balance spring to the hairspring key runs the risk of stressing it and creating an error in the precision timepiece, especially due to off-center winding. In addition, eliminating the play also changes the rate, and once the balance spring has been clamped, you can no longer move the hairspring key along the balance spring to fine-tune the rate.

[0012] Other balance springs have integrated rate adjustment devices. In these balance springs, the rate is not adjusted by changing the effective length of the balance spring, but by applying a force or torque to a flexible element arranged in series with the balance spring. In this way, the stiffness of the flexible element and thus the stiffness of the balance spring as a whole can be modified. Adjusting the stiffness of the balance spring allows the rate of the regulating member to be adjusted. For example, such balance springs with flexible elements are described in patent applications EP21202213.1 and CH0700385 / 2021.

[0013] In these cases, the usual systems cannot be used because they are not compatible with the balance spring regulating device. In addition, since the rate has to be adjusted to a very fine degree, it is very important that there is no play between the balance spring and the area where the balance spring interacts with the hairspring regulating assembly. More specifically, if this is not the case, if the balance spring does not reposition itself in exactly the same way after an impact, there is a risk of a rate change in the event of an impact.

[0014] In order to use such a balance spring, a regulator system has been described in patent applications EP22177059.7 and CH000678 / 2022. The regulator system includes a stud holder consisting of two parts that can move relative to each other, each element being provided with a stud. On the one hand, a flexible element is mounted on the stud, and on the other hand, a prestressing device acts on the flexible element. Thus, by moving the two elements relative to each other, the force or torque applied to the flexible element is modified in order to adjust the stiffness of the balance spring.

[0015] However, the regulator system is complex to implement because each of the movable elements of the stud holder performs a rotational movement above the balance spring.

[0016] Furthermore, in these patent applications, the balance spring has a specific shape because the flexible element and the prestressing device are directly mounted on the balance spring, or the balance spring and the regulating device are made in one piece. Thus, with such a regulator system, it is not possible to use a conventional balance spring.

[0017] In addition, it may also be necessary to adjust the isochronism slope of the regulating member. Summary of the Invention

[0018] The object of the present invention is to overcome all or some of the above-mentioned drawbacks by providing a stud holder that is compatible with a conventional balance spring and that can provide the same advantages in terms of the precision of regulating the rate and / or isochronism as a balance spring equipped with a regulating device such as in the prior art.

[0019] To this end, the present invention relates to a stud holder for a regulating member of a watch movement, the regulating member including an inertial mass (such as a balance wheel), a balance spring including a strip wound around itself a plurality of turns, and a balance bridge. The stud holder includes a main body intended to be mounted on the balance bridge, and a secondary body arranged at a distance from the main body and configured to suspend the balance spring. The regulating member includes a flexible element connecting the main body to the secondary body.

[0020] The present invention is characterized in that the stud holder includes a prestressing device for applying a variable force or torque to the flexible element in order to adjust the rate and / or isochronism slope of the regulating member.

[0021] Thanks to the present invention, it is possible to use a balance spring of a conventional shape, i.e., a balance spring on which no flexible element is directly mounted or formed. More specifically, the flexible element is arranged on the stud holder such that the balance spring only needs to be mounted on the stud holder to obtain the same advantages as a balance spring of the prior art equipped with a device for adjusting the stiffness.

[0022] The prestressing device of the flexible element and the detent retainer forms a device for adjusting the rate and / or isochronism of a regulating member equipped with a balance spring.

[0023] By acting on the prestressing device, the force or torque applied to the flexible element is modified, thereby causing a change in the stiffness of the assembly including the flexible element and the strip. More specifically, the flexible element placed in series with the strip provides additional stiffness to the strip, which is added after the strip. Thus, when the prestressing device applies a variable force or torque to the flexible element, they modify the stiffness of the flexible element and thus the stiffness of the assembly including the strip and the flexible element.

[0024] Thus, on the one hand, the stiffness of the flexible element can be adjusted in order to adjust the rate of the regulating member, and on the other hand, the flexible element allows the secondary body to rotate relative to the primary body, and as a result, allows the isochronism slope of the regulating member to be adjusted.

[0025] This also avoids the need to manufacture complex balance springs.

[0026] According to a particular embodiment of the invention, the flexible element comprises two crossed flexible blades connecting the primary body to the secondary body.

[0027] According to a particular embodiment of the invention, the two flexible blades are connected to each other at their intersection.

[0028] According to a particular embodiment of the invention, the flexible element comprises two flexible non-crossed blades connecting the primary body to the secondary body.

[0029] According to a particular embodiment of the invention, the flexible element comprises a flexible neck connecting the primary body to the secondary body.

[0030] According to a particular embodiment of the invention, the flexible element comprises a flexible blade connecting the primary body to the secondary body.

[0031] According to a particular embodiment of the invention, the flexible element comprises two substantially parallel flexible blades that connect the primary body to the secondary body so as to form a translation stage.

[0032] According to a particular embodiment of the invention, the primary body comprises an arm to which the flexible element is assembled.

[0033] According to a particular embodiment of the invention, the flexible element is stiffer than the strip.

[0034] According to a particular embodiment of the invention, the torque or force can be continuously adjusted by the prestressing device.

[0035] According to a particular embodiment of the invention, the prestressing device comprises a movable rod that is arranged to bear against the flexible element.

[0036] According to a specific embodiment of the present invention, the prestressing device includes a spring connected to a secondary body and a first movable body for stretching or compressing the spring.

[0037] According to a specific embodiment of the present invention, the spring includes secondary flexible blades.

[0038] According to a specific embodiment of the present invention, the spring includes a plurality of tertiary flexible blades connecting the primary body to the first movable body.

[0039] According to a specific embodiment of the present invention, the spring includes a plurality of quaternary flexible blades connecting the first movable body to a second movable body of the prestressing device.

[0040] According to a specific embodiment of the present invention, the prestressing device includes a plurality of rigid segments connected by a flexible neck or flexible blades.

[0041] The present invention also relates to a clock regulating member, which includes an inertial mass (such as a balance wheel), a hairspring including a strip wound around itself for several turns, a balance wheel bridge, and such a stud retainer.

[0042] The present invention also relates to a clock movement including such a clock regulating member. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] With reference to the accompanying drawings, after reading several embodiments, the objects, advantages and features of the present invention will become apparent. These embodiments are provided for illustrative purposes only and are not intended to limit the scope of the present invention, wherein:

[0044] - Figure 1 A top view of a stud retainer according to a first embodiment of the present invention is schematically shown.

[0045] - Figure 2 A top view of a stud retainer according to a second embodiment of the present invention is schematically shown.

[0046] - Figure 3 A top view of a stud retainer according to a third embodiment of the present invention is schematically shown.

[0047] - Figure 4 A top view of a stud retainer according to a fourth embodiment of the present invention is schematically shown.

[0048] - Figure 5 A top view of a stud retainer according to a fifth embodiment of the present invention is schematically shown.

[0049] - Figure 6 A top view of a stud retainer according to a sixth embodiment of the present invention is schematically shown.

[0050] - Figure 7 Schematically shows a top view of a detent retainer according to a seventh embodiment of the present invention,

[0051] - Figure 8 Schematically shows a perspective view of a detent retainer according to an eighth embodiment of the present invention,

[0052] - Figure 9 Schematically shows a top view of a detent retainer according to a ninth embodiment of the present invention,

[0053] - Figure 10 Schematically shows a top view of a detent retainer according to a tenth embodiment of the present invention,

[0054] - Figure 11 Schematically shows a top view of a detent retainer according to an eleventh embodiment of the present invention,

[0055] - Figure 12 Schematically shows a top view of a detent retainer according to a twelfth embodiment of the present invention,

[0056] - Figure 13 Schematically shows a top view of a detent retainer according to a thirteenth embodiment of the present invention,

[0057] - Figure 14 Schematically shows a top view of a calibration member provided with a detent retainer according to a thirteenth embodiment of the present invention,

[0058] - Figure 15 Schematically shows a top view of a detent retainer according to a fourteenth embodiment of the present invention, and

[0059] - Figure 16 Schematically shows a top view of a detent retainer according to a fifteenth embodiment of the present invention. DETAILED DESCRIPTION

[0060] Figures 1 to 16 Each schematically shows a different embodiment of a detent retainer 1, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, 140 according to the present invention. Such detent retainers 1, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, 140 are intended to be arranged in a calibration member of a watch movement. The detent retainers 1, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, 140 preferably extend substantially in the same plane.

[0061] The regulating member generally includes an inertial mass member (such as a balance wheel), a balance spring, and a balance cock that allows it to be assembled on the plate of a watch movement.

[0062] In particular, the stud holders 1, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, 140 have the function of suspending a balance spring that extends substantially in a plane. Such a balance spring includes a flexible strip that is wound around itself a number of turns, and the strip has a predetermined stiffness.

[0063] In Figures 1 to 16 it, the stud holders 1, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, 140 include a main body 2 that is intended to be mounted on the balance cock, such as around a support member that holds the balance wheel. The main body 2 is, for example, annular and can be arranged around the support member.

[0064] The stud holders 1, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, 140 also include a secondary body 3 that is arranged at a distance from the main body 2. The secondary body 3 includes a groove for inserting and holding the first end of a stud, preferably facing the lower side of the balance cock.

[0065] Depending on the embodiment, the secondary body 3 has an annular or rectangular shape.

[0066] The main body 2 and the secondary body 3 are connected by a flexible element 5, preferably only by the flexible element 5. Thus, the stiffness of the flexible element 5 is added to the stiffness of the balance spring. The stiffness of the flexible element 5 is preferably greater than the stiffness of the balance spring. Due to the deformation of the flexible element 5, the secondary body 3 can move relative to the main body.

[0067] According to the invention, the stud holders 1, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, 140 include a prestressing device 6 for applying a variable force or torque to the flexible element 5 in order to adjust the rate of the balance spring. Thus, the stiffness of the assembly including the balance spring and the flexible element 5 can be adjusted.

[0068] The prestressing device 6 preferably allows the flexible element 5 to move translationally or rotationally in the plane of the balance spring in order to modify the isochronism slope of the regulating member.

[0069] Thus, the stiffness of the flexible element 5 can be changed, wherein the flexible element 5 deforms very little under the action of the prestressing device 6, preferably where the hairspring is in the rest position. When the prestressing device 6 acts on the flexible element 5, the flexible element 5 deforms to a greater or lesser extent. Thus, by changing the force or torque supplied by the prestressing device 6, the stiffness of the flexible element 5 is modified.

[0070] Preferably, in order to modify the rate without any effect on the non-equidistant timing curve, the ends of the strip remain substantially fixed regardless of how the prestressing device 6 is adjusted. The force or torque applied to the flexible element 5 substantially does not modify the position of the end of the strip to which the flexible element is attached. Only the flexible element 5 is acted upon in order to modify its stiffness, without directly acting on the strip. This provides higher precision because only one element is used to adjust the stiffness. During the swing, the end 4 of the strip can be movable.

[0071] Furthermore, due to the prestressing device 6, the torque or force is continuously adjustable. In other words, the torque or force is not limited to isolated values. Thus, the stiffness of the flexible element 5 can be adjusted very precisely.

[0072] In most embodiments of the stud holders 1, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, 140 described below, the prestressing device 6 is represented by a screw 7 that bears more or less against the secondary body 3 or against an intermediate structure. However, other prestressing devices 6 are clearly possible, such as rods, buttons or eccentrics.

[0073] The prestressing device 6 is applied directly to the secondary body 3.

[0074] Figure 1 The first embodiment of the stud holders 1, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, 140 shown describes a flexible element 5 that includes a substantially straight flexible blade 4 connected to the main body 2 and the secondary body 2. Under the action of the prestressing device 6, the stiffness of the flexible blade 4 changes.

[0075] In Figure 2 In the example shown, the flexible element 5 of the hairspring 1 includes a neck 8 with a reduced material thickness, and the neck 8 is flexible. Thus, by applying a variable force or torque to the secondary body, the stiffness of the neck 8 is modified, and thus the stiffness of the assembly including the strip 2 and the flexible element 5 is modified.

[0076] In Figure 3In [the figure], the flexible element 5 includes a translation stage. The translation stage includes: at least one flexible blade, in this case two flexible blades 9; and a rigid portion 11 including a secondary body 3. The flexible blades 9 are connected to the secondary body 3 by one end and to the primary body 2 by the other end. The flexible blades 9 are substantially parallel and are arranged in different rows.

[0077] The secondary body 3 is preferably arranged in the middle of the rigid portion 11. In this figure, a variable force or torque is applied to the rigid portion 11 in the direction of the flexible blades 9. Due to the bending of the flexible blades 9, the rigid portion 11 can be slightly displaced. The displacement of the rigid portion 11 changes the stiffness of the flexible element 5.

[0078] In Figures 4 to 8 the illustrated embodiments of the pin holders 30, 40, 50, 60, 70, the primary body 2 includes an arm 12 that extends substantially tangentially to the ring. The flexible element 5 is connected to the arm. In these embodiments, the force or torque does not point towards the primary body as in the first embodiment, but is perpendicular to the arm 12 and points towards the arm 12.

[0079] Figure 4 An embodiment is shown in which the pin holder 30 includes a translation stage similar to the translation stage of the third embodiment in Figure 3 ; however, the translation stage is vertically mounted on the arm 12. The flexible blades 9 of the translation stage are connected to the arm 12 and extend tangentially to the primary body 3.

[0080] Figure 5 The flexible element 5 of the pin holder 40 shown in [the figure] includes a pivot with crossed flexible blades, which includes two crossed flexible blades 13 that are associated with the secondary body 3 on the one hand and with the primary body 2 on the other hand. The pivot with crossed flexible blades 13 is arranged such that the flexible blades 13 cross on the extension in the direction in which a variable force or torque is applied to the secondary body 3.

[0081] Figure 6 An embodiment of the pin holder 50 is shown, which includes a pivot with crossed flexible blades 14, which includes two crossed flexible blades 14 joined at the crossing point 15. The flexible blades 14 are connected to the primary body 2 on the one hand and to the secondary body 3 on the other hand.

[0082] In Figures 7 to 14In the embodiments of the detent retainers 60, 70, 80, 90, 100, 110, and 120 shown, the flexible element 5 includes a pivot having non-crossing flexible vanes. The pivot includes two non-crossing flexible vanes 16. The flexible vanes 16 are directly laterally connected to the main body 2 or to the peripheral arm 12 on one hand, and on the other hand are connected to the secondary body 3 by moving towards each other. The center of rotation of the pivot having non-crossing flexible vanes is the virtual intersection point of the vanes 16. This center of rotation is preferably located at the center of the secondary body 3 or on the axis of the detent 41.

[0083] Figure 7 and Figure 8 The detent retainer 60 shown in and includes an arm 12, which is differently oriented, and a pivot having non-crossing vanes 16 is attached to the arm 12.

[0084] Figure 8 The detent 41 is shown extending below the detent retainer 70 to hold the balance spring 17. The detent 41 includes a notch 42 at its second end. The notch 42 is configured to hold the outer end of the balance spring 17. The shape of the detent 41 and the groove is preferably substantially cylindrical. The detent 41 and the balance spring 17 are assembled, for example, by bonding, brazing, welding, by metallic glass deformation, or by mechanical fastening.

[0085] In Figure 9 In the embodiment of the detent retainer 80 shown, the flexible vanes 16 of the flexible element 5 extend on both sides of the main body 2 to connect to tabs connected to the main body 2.

[0086] The prestressing device 6 includes a rod 19, which directly abuts against the secondary body 3 at its first end 18 and includes fastening means 22 at its second end. The prestressing device 6 further includes a cam 21, and the rod 19 rests on the cam 21. Thus, by actuating the cam 21, the rod 19 abuts more or less against the secondary body 3 in order to modify the stiffness of the flexible element 5. The vanes 16 preferably cross at the first end 18.

[0087] In Figure 10 In the embodiment shown, the prestressing device 6 of the detent retainer 90 includes a spring 24 and a movable body 25. The spring 24 is connected to the secondary body 3 on one hand and to the movable body 25 on the other hand. Thus, by moving the movable body 25, the spring 24 transfers a variable force or torque to the secondary body 3 in order to adjust the stiffness of the flexible element 5.

[0088] Figure 11 The embodiment of the detent retainer 100 shown is Figure 10Alternative embodiment of the embodiment shown, in which the secondary flexible blade 28 is arranged between the spring 24 and the secondary body 3, in continuation of the spring 24.

[0089] For this purpose, the prestressing device 6 is provided with a second movable body 29 to which the spring 24 is connected on one side and the secondary flexible blade 28 is connected on the other side. The secondary flexible blade 28 is connected to the second movable body 29 and the secondary body 3. By acting on the first movable body 25, the prestressing device 6 modifies the variable force or torque acting on the secondary body 3 via the second body 29 and via the secondary flexible blade 28.

[0090] In Figures 10 to 12 the pin holders 90, 100, 110 shown, the main body 2 includes second arms 27, 32 extending from the main body 2 to form a guiding volume for the first movable body 25 together with the first arm 12.

[0091] In Figure 12 the secondary body 3 of the pin holder 110 includes a third arm 31 extending laterally from the secondary body 3. The prestressing device 6 bears more or less against the first arm 12. When the pin holder 110 is in the rest position, the second arm 32 and the third arm 31 are substantially parallel. In this case, the second arm 32 includes a screw of the prestressing device 6 which bears against the third arm 31 which is offset with respect to the secondary body 3.

[0092] Thus, when the screw of the prestressing device 6 bears against the third arm 31, the third arm 31 rotates about a rotation center located at the intersection of the non-crossing blades 16 and rotates the secondary body 3. The end of the non-crossing blade 16 connected to the secondary body 3 moves, such that the stiffness between the non-crossing blades 16 is significantly changed. This difference in stiffness between the two non-crossing blades 16 makes it possible to modify the isochronous slope of the tuning member.

[0093] Figure 13 and 14 the embodiment of the pin holder 120 shown includes a prestressing device 6 provided with a spring formed by a flexible blade guide. The secondary flexible blade 28 connects the secondary body 3 to a first elongated rigid body 34 which extends in continuation of the secondary flexible blade 28.

[0094] The prestressing device 6 includes a second rigid body 37 and a third-stage blade 36 connecting the two rigid bodies 34, 37, which are three blades in this case. When the prestressing device 6 is in the rest position, the two rigid bodies 34, 37 are movable and have segments that are substantially pairwise parallel. When the prestressing device 6 is in the rest position, the third-stage blade 36 is substantially perpendicular to the secondary blade 28. The prestressing device 6 further includes two fourth-stage blades 33 that connect the first body 34 to a third arm 35 extending from the main body 2. The third arm is substantially parallel to the second arm and is oriented in the same way.

[0095] The fourth-stage blades 33 are substantially parallel to the third-stage blade 36 and are arranged on the same side of the second rigid body 37. By applying a variable force or torque to the second rigid body 37, the prestressing device 6 changes the stiffness of the flexible element 5 in order to modify the rate of the tuning member. The prestressing device 6 is arranged on the axis of the flexible element 5.

[0096] In Figure 14 the Figure 13 folded alternative embodiment of the detent holder 120 of the illustrated embodiment is mounted on the tuning member 150, which includes a hairspring 44, a balance wheel 41, a balance wheel bridge 42, and a support 43. The main body 2 of the detent holder 120 is mounted on the balance wheel bridge 42 around the support 43. The balance wheel 41 is located below the balance wheel bridge 42 and above the hairspring 44. The main body 3 includes a clamp for holding the detent.

[0097] In Figure 15 the illustrated embodiment of the detent holder 130, the prestressing device 6 is configured to allow the rate and the isochronism slope to be adjusted. The main body 2 includes a first straight arm 12 and a second U-shaped arm 32.

[0098] The prestressing device 6 includes a peripheral reinforcement 45 that partially surrounds the main body 2 and the secondary body 3, which substantially depicts the shape of a pentagon missing one face. The peripheral reinforcement 45 is connected to the secondary body 3 by a first pair of non-crossing flexible blades 16 and to the first straight arm 12 of the main body 2 by a second pair of flexible blades 46.

[0099] The prestressing device 6 is provided with a secondary blade 28 connected to the secondary body 3, and a first L-shaped movable body 25 and a second U-shaped movable body 29. The secondary flexible blade 28 is connected to the U-shaped inner side of the second movable body 29, which is oriented towards the secondary body 3.

[0100] The prestressing device 6 includes two third-stage vanes 33 and two fourth-stage vanes 36. The two third-stage vanes 33 and the fourth-stage vanes 36 are arranged continuously with each other and are perpendicular to the secondary flexible vane 28 in the rest position of the prestressing device 6. The third-stage vanes 33 connect the second movable body 29 to the peripheral reinforcement, while the fourth-stage flexible vanes 36 connect the second movable body 29 to the first movable body 25.

[0101] The prestressing device 6 includes two screws. The first screw 7 is arranged to pass through the first bent end 48 of the peripheral reinforcement 45 to bear against the first movable body 25. The second screw 47 is arranged to pass through the second arm 32 of the main body 2 to bear against the second end 49 of the peripheral reinforcement 45.

[0102] The first screw 7 is used to modify the rate of the tuning member, while the second screw 47 is used to modify the isochronous slope of the tuning member.

[0103] More specifically, by actuating the second screw 47, the peripheral reinforcement 45 rotates about the center of rotation corresponding to the intersection between the second pair of flexible vanes 46 and the secondary body 3. This rotation modifies the stiffness between the two non-crossing vanes 16 in the same way as Figure 12 the embodiment shown.

[0104] In Figure 16 the embodiment of the pin holder 140 shown, the flexible element 5 is similar to Figure 2 the neck 8 of the pin holder 10 shown, and the prestressing device 6 is provided with a plurality of elongated rigid segments, which are in this case two rigid segments 51, 52 connected by flexible necks 53, 54. In the rest position, the rigid segments 51, 52 and the flexible necks 53, 54 are substantially arranged in a straight line.

[0105] In this embodiment, the flexible necks 53, 54 can be replaced by flexible vanes similar in length to the necks.

[0106] Similar to Figure 13 the embodiment of the pin holder 120 shown, the prestressing device 6 is also provided with a spring formed by flexible vanes. The third-stage flexible vanes 33 and the fourth-stage flexible vanes 36 are connected to the second segment 52 of the prestressing device 6.

[0107] By applying a variable displacement to the rigid movable body 37, the prestressing device 6 changes the stiffness of the flexible element 5. The force or torque is partially transmitted to the second rigid segment 52 and is transmitted to the flexible element 5 via the first rigid segment 51 and via the flexible necks 53, 54. Thus, the rate of the tuning member is changed.

[0108] It goes without saying that the present invention is not limited to the embodiments of the calibration member described with reference to the drawings, and alternatives can be considered without departing from the scope of the present invention.

Claims

1. A latching pin holder for a setting component (150) of a watch movement, the setting component (150) comprising: an inertial mass, such as a balance wheel (41); a balance spring (17, 44) comprising a bar wound several times around itself; and a balance cock (42), the pin holder (1, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, 140) comprising a main body (2) and a secondary body (3), the main body being intended to be mounted on the balance cock (42), the secondary body (3) being arranged at a distance from the main body (2) and being configured to suspend the balance spring (17, 44), the The adjustment member comprises a flexible element (5) connecting the primary body (2) to the secondary body (3), characterized in that the pin holder (1, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, 140) comprises a prestressing device (6) for applying a variable force or torque to the flexible element (5) in order to adjust the rate and / or isochronous slope of the adjustment member (150).

2. The latch holder according to claim 1, characterized in that: The flexible element (5) comprises two crossed flexible blades (13, 14) connecting the primary body (2) to the secondary body (3).

3. The latch holder according to claim 2, characterized in that: The two flexible blades (14) are connected to each other at their intersection (15).

4. The latch holder according to claim 1, wherein: The flexible element (5) comprises two non-intersecting flexible blades (16) connecting the primary body (2) to the secondary body (3).

5. The latch holder according to claim 1, characterized in that: The flexible element (5) comprises a flexible neck (8) connecting the primary body (2) to the secondary body (3).

6. The latch holder according to claim 1, characterized in that: The flexible element (5) comprises flexible blades (4) connecting the primary body (2) to the secondary body (3).

7. The latch holder according to claim 1, characterized in that: The flexible element (5) comprises two substantially parallel flexible blades (9) connecting the primary body (2) to the secondary body (3) so as to form a translation stage.

8. A latch holder according to any one of the preceding claims, characterised in that The main body (2) comprises an arm (12) to which the flexible element (5) is assembled.

9. A latch holder according to any one of the preceding claims, characterised in that The flexible element (5) is stiffer than the strip.

10. A latch holder according to any one of the preceding claims, characterised in that Due to the prestressing device (6), the torque or force is continuously adjustable.

11. A latch holder according to any one of the preceding claims, characterised in that The prestressing device comprises a movable rod (19) arranged to bear against the flexible element (5).

12. The pin retainer according to any one of claims 1 to 10, characterized in that: The prestressing device (6) comprises a spring (24) connected to the secondary body (3) and a first movable body (25, 34) for stretching or compressing the spring (24).

13. The latch holder according to claim 12, wherein: The spring includes a secondary flexible leaf (28).

14. The pin retainer according to claim 12 or 13, characterized in that: The spring comprises a plurality of tertiary flexible leaves (33) connecting the main body (2) to the first movable main body (34).

15. The latch holder according to claim 14, characterized in that: The spring comprises a plurality of fourth-stage flexible leaves (36) connecting the first movable body (34) to the second movable body (37) of the prestressing device (6).

16. The latching pin retainer according to any one of claims 1 to 10, characterized in that: The prestressing device (6) comprises a plurality of rigid sections (51, 52) connected by flexible necks (52, 54) or flexible blades (101).

17. A regulating member for a watch movement, the regulating member (150) comprising: An inertial mass, such as a balance wheel (41); a balance spring (44) comprising a bar wound several times around itself; a balance cock (42); and a pin-holder (120) according to any one of the preceding claims.

18. A watch movement, characterized in that: It comprises a setting member (150) according to claim 17.

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