Flexible unions for meter components

Abstract

A structure comprises two parts (3, 4; 3', 4') of a watch component and a rotation axis (A1; A1'), the two parts (3, 4; 3', 4') being connected to each other around the rotation axis (A1; A1') by an elastic hinge link (100; 100'), the structure also comprising an elastic element (10, 10'; 10") so that the two parts (3, 4; 3', 4') can move relative to each other on the elastic element (10, 10'; 10"), wherein the elastic element (10, 10'; 10") comprises at least two superimposed springs (10a, 10b, 10a', 10b'; 10a", 10b"), each of the at least two springs (10a, 10b, 10a', 10b'; 10a", 10b") being in the form of a different element.

Description

Technical Field

[0001] The present invention relates to a structure for an elastically articulated link between two parts of a watch assembly, more specifically between two parts of a watch external device, in particular a watch bracelet, the structure being arranged at a buckle of the bracelet or at a link of the bracelet. The invention also relates to an external device, and even more generally to a watch component, a buckle, a bracelet and a watch comprising such a structure. Background Art

[0002] There are various solutions for achieving a resilient joint between two parts of a watch exterior, in particular a watch.

[0003] For example, document EP1654950 describes a method for realizing elastic locking and unlocking of two movable blades of a chain belt fastener. By hooking a locking hook body on a locking block under the action of one or more elastic elements, the first movable blade is folded back and locked in place on the second blade.

[0004] This embodiment makes it possible to guarantee very good locking security while optimizing the force required to open the fastener, which makes it a very satisfactory solution in terms of closing and handling security.

[0005] Furthermore, in solutions with a fastener, there is usually a first setting of the positioning of the fastener relative to the chain, called the conventional setting. However, the final length obtained is usually not perfect and not optimal. For this reason, existing fasteners, such as the one described in document EP2606762, are equipped with a solution for a second setting of the length of the chain, thereby supplementing the first conventional setting. This second setting allows the modification of the length of the chain to be achieved through a very simple and user-friendly manipulation that requires neither tools nor specific skills, which can change the initial setting. This second setting can especially improve the comfort of the wearer by enabling an easy modification of the initial setting in a way that overcomes any changes in the wrist circumference, which depends, for example, on the temperature or the ambient pressure and on the strength exerted by the wearer of the chain with his arms. This solution relies here on an elastic joint between two external parts, in particular two links of the chain.

[0006] Finally, these existing elastic union solutions are very effective, but there is still a need to improve them. In fact, the best compromise is always sought between the safety and reliability of the operation of these solutions and the feeling the user has in his manipulation of these solutions, this feeling being directly related to the perceived quality impression of the product comprising such an elastic union.

[0007] The general object of the present invention is therefore to propose a solution for an elastic articulated link between two parts of a watch assembly which achieves an optimal compromise between the efficiency of the elastic assembly and the perceived quality of it.

[0008] In particular, it is more particularly sought to obtain such a solution for a strap fastener. Summary of the invention

[0009] To this end, the invention relies on a structure for an elastic articulation link between two parts of a watch assembly, wherein the structure comprises at least one elastic element comprising at least two superposed springs.

[0010] The invention is more particularly defined by the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] These objects, features and advantages of the present invention will be explained in detail in the following description of particular embodiments given in a non-limiting manner with respect to the accompanying drawings, in which:

[0012] Figure 1 A perspective view showing a fastener according to a first embodiment of the present invention as viewed from above.

[0013] Figure 2 A view showing a fastener according to a first embodiment of the present invention viewed from above.

[0014] Figure 3 A III-III cross-sectional view showing the fastener according to the first embodiment of the present invention in a first configuration of the fastener.

[0015] Figure 4 express Figure 3 An enlarged view of a detail of a cross-sectional view.

[0016] Figure 5 A VV cross-sectional view showing the fastener according to the first embodiment of the present invention in a first configuration of the fastener.

[0017] Figure 6 express Figure 5 An enlarged view of a detail of a cross-sectional view.

[0018] Figure 7 Indicates the elastic joint of the fastener is actuated to change it from the first configuration to the second configuration. Figure 4 Similar views.

[0019] Figure 8 An exploded perspective view showing an elastic element of an elastic joint according to a first embodiment of the present invention.

[0020] Fig. 9 Shown is a graph reporting the unlocking force or opening force of a fastener according to a first embodiment of the invention compared to prior art solutions.

[0021] Fig.10 and Fig.11A cross-sectional view of an elastic joint according to a solution of the prior art is shown, wherein the unlocking force is given by Fig. 9 Shown.

[0022] Fig.12 A spring element according to a variant embodiment of the invention is schematically represented.

[0023] Fig.13 A cross-sectional view showing a fastener according to a second embodiment of the present invention in a first configuration.

[0024] Fig.14 express Fig.13 A detail view of a cross-sectional view of FIG. 1 shows an elastic joint of a fastener according to a second embodiment of the present invention.

[0025] Fig.15 Represents something like Fig.14 sectional view showing the elastic joint of the fastener according to the second embodiment of the present invention in the second configuration.

[0026] Fig.16 A view showing a calendar cam lever device according to a modified embodiment of the present invention. DETAILED DESCRIPTION

[0027] As will be described in detail below, the invention relies on the use of at least one elastic element comprising at least two superposed springs which allow advantageous properties to be achieved with respect to the elastic force achieved according to the elastic joint between two parts of the external device of the watch. Advantageously, the two springs are different. More advantageously, one of the two springs covers the entire surface of the other of the two springs.

[0028] Figures 1 to 7 A buckle 200 for a strap according to a first embodiment of the invention is shown, the buckle 200 comprising two hinged blades 6a, 6b. The operation of the buckle is similar to that described in document EP1654950 and will not be described in detail. The main difference between the buckle and such solutions of the prior art is that the elastic element comprises two superimposed springs, which will be described in detail below.

[0029] The fastener 200 has no cover. It is designed for placing the end links of the two lengths of the chain 300 directly on their respective blades. The chain comprises in particular a movable link 3, which is movably mounted on a first pin 1 with a first axis A1 relative to a central link 4 and two external links 5a, 5b, which are fixed to each other in particular via a third pin 9. The locking hook 31 is fixed to the movable link 3 with little play by a second pin or rivet 2 with a second axis A2. This assembly is arranged on the first movable blade 6a of the fastener 200.

[0030] Figures 1 to 6 The first closed configuration of the fastener 200 is shown, in which the locking hook 31 cooperates with the locking block 7 fixed to the second blade 6b of the fastener.

[0031] The articulation of the movable link 3, in particular the hook 31, relative to the central link 4 forms an elastic articulation 100 comprising two identical or substantially identical elastic elements 10, 10'. Each elastic element 10, 10' is preloaded between the locking hook 31 and the central link 4 of the chain fixed to the external links 5a, 5b. This central link 4 forms a fixed abutment 4a of the structure. Thus, each elastic element exerts a force on the locking hook 31 which tends to bring it into and maintain its closed configuration in engagement with the locking block 7. Figure 2 and Figures 3 to 6 As can be seen in FIG. 1 , the fastener according to the first embodiment of the present invention comprises two elastic elements 10 , 10 ′ which are substantially symmetrically arranged on both sides of the longitudinal middle plane P of the fastener.

[0032] Thus, in this embodiment, the elastic joint 100 comprises two substantially identical elastic elements 10, 10'. The elastic element 10 comprises two superposed springs 10a, 10b. Both springs 10a, 10b are in the form of curved leaves. They comprise a circular shape so that they can be arranged in the recess 33 of the hook body 31 around the second axis A2. Similarly, both springs 10a', 10b' are substantially in the form of curved leaves. They comprise a circular shape so that they can be arranged in the recess 33' of the hook body 31 around the second axis A2, which is Figure 6 It is more particularly visible in.

[0033] The two springs 10a, 10b are different. According to an embodiment, the two springs 10a, 10b belong to different elements. Each spring 10a, 10b forms an integral and / or one-piece component.

[0034] The first spring 10b is called the inner spring because it is closer to the second axis A2. It is covered by the second spring 10a, which is called the outer spring. This second outer spring 10a covers or advantageously covers the entire surface of the first inner spring 10b. Its length is greater than that of the first inner spring 10b. The first end 102a of the second spring 10a allows the spring to abut against the first abutment 4a of the central link 4, thereby forming a fixed abutment. The second end 101a of the second spring 10a allows abutment against the abutment 33a of the first recess 33 of the hook body 31. Therefore, as mentioned above, the spring is prestressed between its two ends 101a, 102a and therefore transmits stress to the hook body 31. The second outer spring 10a also abuts against the first spring 10b at the contact surface, which also transmits the elastic force to the second outer spring 10a. Therefore, the characteristics of the elastic element 10 correspond to the combination of the characteristics of the two springs 10a, 10b.

[0035] Figure 7 The operation of forming the structure of the elastic articulated link about said first axis of rotation A1 is shown, which involves two parts 3, 4 of the clasp connected to each other by means of an elastic articulated link about the axis of rotation A1 via two elastic elements 10, 10'. According to this first embodiment of the invention, the articulated link realizes the locking / unlocking function of the clasp. Figures 1 to 6 The clasp is shown in a first closed configuration, wherein the locking hook 31 is engaged with the locking element 7 of the blade 6b of the clasp. The opening of the clasp 200 is performed by a clamping member 32 fixed to the movable link 3. The actuation of the clamping member 32 requires a force Fd which causes the movable link 3 (at Figure 7 The locking hook 31 is rotated about the axis A1 (in the clockwise direction) in the center of the chain (in the clockwise direction), which causes the locking hook 31 to retract from the locking block 7. Here, the necessary opening or unlocking force Fd is represented to a large extent by the sum of the compression forces F caused by the two elastic elements 10, 10' of the two springs 10a, 10b, 10a', 10b' under the action of the displacement of the movable link 3 and therefore the hook 31 relative to the central link 4. This force F is applied by the spring on the central link 4 at the abutment 4a. Its orientation is substantially parallel to the superposition direction of the two springs 10b, 10a, which is considered to be on the ends of the two springs close to this abutment 4a.

[0036] Thus, when opening, the two elastic elements are compressed due to the rotation of the movable link 3 relative to the central link 4 under the action of the clamping member 32. When closing, the elastic elements are compressed due to the contact between the end of the locking hook 31 and the top of the locking block 7. This causes the retraction of the locking hook 31 and thus the movable link 3, so that the locking hook 31 can be accommodated under the locking block 7. In all cases, the two elastic elements 10, 10' are preloaded by the abutment 4a of the central link 4 and the corresponding abutment 33a, 33a' of the recesses 33, 33'.

[0037] According to this first embodiment, the two springs 10a, 10b are not fixed to each other. Therefore, when the springs are compressed, the second external spring 10a is completely free to move relative to the first spring 10b. Such a structure makes it possible to optimally distribute the stresses in the leaves forming the springs while maximizing the stiffness of each spring and therefore the opening or unlocking force Fd of the clasp for a given rotation angle of the movable link 3. In addition, as Figure 8 As shown schematically, this construction can provide an elastic articulation link that is particularly easy to realize by simply inserting a second spring 10b, 10b' between the first spring 10a, 10a' and the axis A2 of the pin 2. Obviously, as a variant, the two superimposed springs can be locally fixed, for example by spot welding, while maintaining the relative movement of the two springs when compressed.

[0038] Fig. 9 The following table shows the rotation angle report of 15° for three different types of elastic joints A, B, C and for the movable link 3. Figure 1 and Figure 2 The unlocking force or opening force Fda, Fdb, Fdc of the fastener shown in FIG. The flexible joint A corresponds to a first elastic flexible joint known from the prior art, which comprises an elastic flexible joint arranged in an aligned and substantially symmetrical manner. Figure 1 and Figure 2 The two identical springs A10, A10' on both sides of the longitudinal midplane P of the fastener shown, the spring A10 is Fig.10 The springs A10, A10' are in the form of a common leaf bent backwards and having a thickness of 0.18 mm. The joint B corresponds to a second elastic joint known from the prior art, which is similar to the joint A but comprises two springs B10, B10', each having a thickness of 0.21 mm instead of 0.18 mm of the joint A. The joint B consists of Fig.11 The cross-section representation is, Fig.11 A spring B10 with a greater thickness is shown, which thickness is exaggerated in this figure in order to better illustrate the difference. Finally, the joint C corresponds to the elastic joint according to the first embodiment of the invention, as Figure 4 and Figure 5As shown, it consists of two pairs of superimposed springs, the outer springs 10a, 10a' being two curved leaves with a thickness of 0.18 mm, and the inner springs 10b, 10b' being two curved leaves with a thickness of 0.14 mm. Here, the springs or leaves are made of the same material, steel, in particular Nivaflex.

[0039] These three measurements make it possible to illustrate the advantages of the invention. In fact, it should be noted that, for the same opening angle α, for example 15°, the force Fdc generated by the joint C of the invention is increased by about 50% compared to the force Fda generated by the joint A, while causing stresses less than the elastic limit of the material constituting the leaves of the spring. The force Fdb generated by the joint B is for its part substantially equal to the force Fdc. However, considering the elastic limit of the constituent materials of the spring, which for the Nivaflex material is about 2500 MPa, the stresses (according to the Von Mises criterion) are unacceptable. According to the teachings of the prior art, increasing the opening or unlocking force of such an unlocking device essentially involves thickening all or part of the spring included in the elastic joint, which may lead to the risk of plasticizing the leaves beyond the prescribed thickness, as in the case of the joint B. In other words, the maximum opening force of the unlocking device of the fastener depends on the maximum stress that each of the leaves forming the spring can be subjected to, which may limit the expected opening force.

[0040] The flexible joint C according to the invention comprises elastic elements, each of which comprises two superposed springs having different thicknesses. Obviously, as a variant, these springs may have the same thickness. They may also have Figure 8 The same widths La, La', Lb, Lb' are shown, or different widths. The materials of the stacked springs 10a, 10b may also be the same or different.

[0041] By way of example Fig. 9 , to illustrate the effect of the invention. As a variant, the at least two springs of the elastic element according to the invention have any other thickness Ea, Eb, Ea', Eb', advantageously between 0.1 mm and 0.25 mm, even between 0.12 mm and 0.2 mm, even between 0.13 mm and 0.19 mm. Preferably, the at least two springs of the elastic element are made of steel, in particular of Nivaflex.

[0042] It can be seen that the elastic joint according to the present invention has the following advantages:

[0043] - it generates a repeatable opening or unlocking force, and this force generation is independent of the elasticity of the cover body and / or the spreading branches of the fastener;

[0044] -It can maximize the return torque and thus improve its handling feel;

[0045] - despite this increased return torque relative to the prior art, a satisfactory level of stress is maintained within the constituent material of the spring;

[0046] - It can be easily incorporated into all types of fasteners having locking means achieving elastic joints.

[0047] Of course, the elastic element according to the present invention can take forms other than those shown. First, the elastic element can include more than two springs stacked. It can include, for example, three, four or more springs stacked. Therefore, the present invention relies on the use of an elastic element with a plurality of springs stacked. In addition, the movable joint according to the present invention can include a single elastic element.

[0048] Furthermore, the invention can naturally be implemented in a fastener with a cover. Thus, the movable link 3 can be in the form of a clamping member with a locking hook, while the intermediate link 4 can be in the form of a cover on which the clamping member with the locking hook pivots about the axis 1. In such a fastener, the axis A1 can advantageously coincide with the axis A2.

[0049] In addition, according to alternative variant embodiments, each spring may take any other form. Fig.12 As shown, the two superposed springs 10a, 10b can be in the form of leaves or beams (i.e. flat and thin elements) designed to deform by bending when the first part 3, 3* rotates relative to the second part 4, 4*. In this case, for example, the leaves can be locally fixed at the assembly area E where they adjoin the parts 3 and 4. In addition, they can have a constant or non-constant cross-section.

[0050] Of course, the elastic element according to the concept of the present invention can be used for any elastic joint between two surface parts of an external device. Figures 13 to 15 The implementation of the concept of the invention in a precision extension device 200 ′ for extending the length of a link described in document EP 2 606 762 incorporated by reference is shown by way of example and will not be described in full.

[0051] therefore, Figures 13 to 15More specifically, details of an elastic joint 100' implemented in an extension device 200' according to a second embodiment of the invention are shown. In this embodiment, the joint comprises a single elastic element 10' comprising a set of two superimposed springs 10a', 10b'. These two superimposed springs are arranged around a pin 1' (or axis of rotation) with an axis A1', which forms the axis of rotation of the movable link 3' of the chain belt 300'. Each spring is V-shaped, obtained by a curved blade, the base of which is rounded to follow a portion of the rounded surface of the pin 1'.

[0052] The movable link 3' can be actuated rotationally relative to the link 4' around the axis A1', and the link 4' can be translated and moved in the longitudinal direction of the fastener cover 6' by the guide axis A2'. Under the action of the elastic joint 100', the cooperation between the finger 31' of the movable link 3' and the tooth 7a' in the tooth portion 7' ​​of the cover 6' can configure the chain belt 300' according to a predetermined length. To this end, the first end 101a" and the second end 102a" of the second external spring 10a" are pre-stressed on the first abutment portion 3a' of the movable link 3' and the second abutment portion 4a' of the translationally movable link 4', respectively, so as to press the finger 31' against the tooth portion 7'.

[0053] Link 3' Fig.15 The rotation in the clockwise direction shown on the elastic element 10 ″ causes the finger 31 ′ to retract from the tooth 7 ′, thus translating the translationally movable link 8 ′ and therefore translating the movable link 3 ′ relative to the cover 6 ′ of the buckle. Thus, in this configuration, the length of the chain 300 ′ can be adjusted.

[0054] The benefits obtained by the elastic element 10 ″ are the same as those of the first embodiment, namely maximizing the opening force of the expansion device 200 ′ within a given volume while maintaining a satisfactory stress level in the constituent material of the spring leaves.

[0055] Of course, as a variation, some elements of the above described solution can be in another form. In particular, as has been seen, one or more elastic elements with a plurality of superimposed springs can be used in the same elastic joint.

[0056] This superposition of the springs means that the springs have surfaces in direct or indirect contact, which allows them to interact upon actuation of the elastic joint, so that their interaction is combined to optimize the induced elastic forces while minimizing the stresses within them. It is therefore advantageous to superpose the two springs in a direction parallel to the elastic forces they exert upon actuation of the elastic joint.

[0057] Furthermore, as seen in the context of the extension device 200', the elastic element can advantageously be arranged around the axis of rotation of the two parts of the timepiece external device included in the elastic joint. Obviously, the elastic element can be arranged offset and / or separated from this axis of rotation, as described in the context of the buckle 200. It can be arranged around any other axis or independently of the axis.

[0058] At least two springs of the elastic element advantageously take the form of two leaves. In addition, advantageously, the first leaf covers the entire second leaf. Alternatively, the overlapping of the leaves can be only partial.

[0059] Furthermore, the thickness of the at least two springs of the elastic element is advantageously between 0.1 mm and 0.25 mm, even between 0.12 mm and 0.2 mm, even between 0.13 mm and 0.19 mm. Preferably, the at least two springs are made of steel, in particular Nivaflex.

[0060] The invention has been described on the basis of a bracelet clasp associated with a watch, which is also affected by the invention and more specifically at the locking mechanism of the clasp or at the bracelet extension device. As a variant, the principle can be implemented for any articulated elastic link between two watch parts, whether the movement is pure rotation or more complex, such as rotation combined with another displacement. Moreover, the principle can be implemented for the use of an elastic joint 100" in a movement. For example, Fig.16 As shown, such an elastic joint 100" can be used to define a calendar cam lever device 200". For example, the device 200" may include a lever 3 pivoted relative to the movement blank 4" on a first axis A". The end 3a" of the lever 3" is elastically returned on the calendar cam 5" by an elastic element 10*, and the elastic element 10* has the specific feature of including two U-shaped springs 10a*, 10b*, which are arranged in a recess of the blank 4" around the second axis A2" (not shown). Fig.16 ) and preloaded between the rod 3″ and the abutment 4a″ of the blank 4″. The expected gain is the same as previously described, i.e. the return force F″ of the elastic element 10* is maximized while maintaining an acceptable stress level in the leaves of the springs 10a*, 10b*.

Claims

1. A structure for an elastic articulated link between two parts of a watch component, comprising two parts of the watch component and a rotation axis (A1; A1'; A1"), the two parts being connected to each other around the rotation axis (A1; A1'; A1") by an elastic articulated link (100; 100'; 100"), the structure also comprising an elastic element (10, 10'; 10"; 10*) so that the two parts are connected to each other on the elastic element (10 , 10'; 10", 10*), wherein the elastic element (10, 10'; 10", 10*) comprises at least two superimposed springs (10a, 10b, 10a', 10b'; 10a", 10b", 10a*, 10b*), each of the at least two springs (10a, 10b, 10a', 10b'; 10a", 10b", 10a*, 10b*) being in the form of a different element, At least one spring of the at least two stacked springs is not fixed to another spring of the at least two stacked springs, thereby being able to move freely relative to another spring of the at least two stacked springs.

2. The structure according to claim 1, wherein: The at least two springs (10a, 10b, 10a', 10b'; 10a", 10b", 10a*, 10b*) of the elastic element (10, 10'; 10", 10*) are stacked in a direction substantially parallel to the force acting on the at least two springs during relative rotational movement of the two components.

3. The structure according to claim 1 or 2, wherein: The elastic element (10, 10'; 10"; 10*) is arranged around an axis (A2; A1'; A2").

4. The structure according to claim 3, wherein: The elastic element (10, 10'; 10"; 10*) is arranged around the rotation axis of the two components.

5. The structure according to claim 1 or 2, wherein: The at least two springs (10a, 10b, 10a', 10b'; 10a", 10b", 10a*, 10b*) of the elastic element (10, 10'; 10", 10*) are in the form of curved leaves.

6. The structure according to claim 1 or 2, wherein: The at least two springs (10a, 10b, 10a', 10b'; 10a", 10b", 10a*, 10b*) of the elastic element (10, 10'; 10", 10*) are in the form of leaves, and at least one first leaf covers a second leaf.

7. The structure according to claim 6, wherein: At least one first blade covers all of the second blades.

8. The structure according to claim 1 or 2, wherein: The thickness of the at least two springs (10a, 10b, 10a', 10b'; 10a", 10b", 10a*, 10b*) of the elastic element (10, 10'; 10", 10*) is between 0.1 mm and 0.25 mm.

9. The structure according to claim 1 or 2, wherein: The thickness of the at least two springs (10a, 10b, 10a', 10b'; 10a", 10b", 10a*, 10b*) of the elastic element (10, 10'; 10", 10*) is between 0.12 mm and 0.2 mm.

10. The structure according to claim 1 or 2, wherein: The thickness of the at least two springs (10a, 10b, 10a', 10b'; 10a", 10b", 10a*, 10b*) of the elastic element (10, 10'; 10", 10*) is between 0.13 mm and 0.19 mm.

11. The structure according to claim 1 or 2, wherein: The elastic element (10, 10'; 10") comprises at least two superimposed springs (10a, 10b, 10a', 10b'; 10a", 10b") of different thicknesses.

12. A device external to a watch, wherein: The watch external device comprises a structure for an elastic articulated link between two parts of a timepiece component as claimed in any one of claims 1 to 11.

13. The watch external device according to claim 12, wherein: The external watch device is a fastener for a bracelet watch, and wherein the first of the two components is a first movable bracelet link (3) comprising a clamping member (32) and a locking hook body (31), and wherein the second of the two components is a second bracelet link (4), the two components are mounted on the same movable fastener blade, and wherein the fastener comprises at least two fastener blades that can move relative to each other, the first movable bracelet link and the locking hook body (31) are arranged at the free end of the first movable fastener blade (6a) of the at least two fastener blades, so as to be able to cooperate with the locking block body (7) of the second fastener blade (6b) of the at least two fastener blades, and the first movable fastener blade (6a) is hinged to the second fastener blade (6b) at a second end opposite to the free end.

14. The watch external device according to claim 13, wherein: The first movable chain link (3) is in the form of a clamping member having a locking hook, wherein the second chain link (4) is in the form of a buckle cover on which the first movable chain link (3) pivots.

15. The watch external device according to claim 13, wherein: The elastic element (10, 10') applies a torque to the locking hook body (31) so that it reaches a position corresponding to the engagement of the locking hook body (31) with the locking block body (7) of the second fastener blade (6b). The elastic element (10, 10') is in a tensioned state at this position, so that when the locking hook body (31) engages and disengages with the locking block body (7), the locking hook body (31) must pivot on the elastic element (10, 10').

16. The watch external device according to claim 12, wherein: The watch external device is a chain extension device, and wherein the first of the two components is a first rotationally movable link (3'), and the second of the two components is a second translationally movable link (4') relative to the buckle cover.

17. The watch external device according to claim 16, wherein: The external device of the watch is a buckle, wherein the first component is a first rotatably movable link (3') including a finger (31'), and wherein the second component is a second translationally movable link (4'), so that the buckle can occupy a closed position, in which the first rotatably movable link (3') can be fixed to the buckle, the finger (31') cooperates with the teeth of a complementary toothed portion (7') provided on the buckle, and wherein the elastic element (10") tends to press the first rotatably movable link (3') towards the complementary toothed portion (7') provided on the buckle.

18. The watch external device according to claim 13, wherein: The second component is a center link.

19. A watch, wherein: The watch comprises a structure for an elastic articulated link between two parts of a timepiece component according to any one of claims 1 to 11 or a watch external device according to any one of claims 12 to 18.

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