Set of links and bracelet comprising such a set

Abstract

The present invention relates to a set of links comprising: - a first link (10) comprising lateral walls, with reference to a longitudinal axis defined by the axis of a bracelet in which said set of links is intended to be integrated, - a first lateral link (12), arranged laterally with respect to the first link, the first link is connected to the first lateral link so that they are movable in longitudinal translation - a first locking system (20) housed in the first link, able to lock the relative longitudinal position of the first link with respect to the first lateral link, said first locking system being capable of occupying a locked position and an unlocked position, a first pusher (22) housed in the first lateral link and arranged to control the locking system and move it from a locked position to an unlocked position.

Description

Description Link set and bracelet comprising such a set Technical field

[0001] The present invention relates to the field of link watch bracelets. It mainly concerns a set of links comprising at least one central link and two side links. It also concerns a bracelet comprising such a set of links. State of the art

[0002] It is known that a person's wrist can swell slightly with heat or depending on certain arm positions, for example. For a watch wearer, the pressure exerted by the bracelet on the wrist can then become too great. While it is easy to modify the setting of a flexible bracelet with a pin buckle, by changing the hole used and increasing the usable length of the bracelet, this is not possible with a link bracelet.

[0003] Generally, solutions known as comfort systems are used and are housed in the bracelet clasp. Indeed, with a link bracelet, the clasp is of the folding clasp type. It provides volume and structure that can accommodate slides or other solutions, in order to lengthen or reduce the overall length of the bracelet.

[0004] Drawer link solutions are also known, comprising two half-links sliding into each other. This type of construction requires relatively large links and therefore specific types of bracelet construction. It cannot be adapted to multi-row link bracelets.

[0005] The aim of the present invention is to propose a set of links making it possible to overcome the drawbacks of the solutions of the prior art. Disclosure of the invention

[0006] More specifically, the invention relates to a set of links comprising: - a first link comprising side walls, with reference to a longitudinal axis defined by the axis of a bracelet in which said set of links is intended to be integrated, - a first lateral link, arranged laterally with respect to the first link, the first link is connected to the first lateral link so that they are movable with respect to each other at least in a longitudinal direction with reference to the longitudinal axis, for example in longitudinal translation, a first locking system housed in the first link, capable of locking the relative longitudinal position of the first link with respect to the first lateral link, said first locking system being capable of occupying a locked position and an unlocked position, - a first pusher housed in the first lateral link and arranged to control the first locking system and move it from a locked position to an unlocked position. The first locking system in the locked position occupies a locking state in which the first locking system blocks movement at least in the longitudinal direction between the first lateral link and the first link. The first locking system in the unlocked position occupies an unlocked state in which the first locking system allows free movement at least in the longitudinal direction between the first lateral link and the first link. According to one embodiment, the first link has a first end and a second end with reference to the longitudinal axis, and the first link comprises an articulation at the first end and at the second end. In particular, the first link may comprise a first pivot articulation at the first end and a second pivot articulation at the second end.So the first link can be part of a chain of links that forms a bracelet.

[0007] In a first variant, the first link is connected to the first side link by a first pin passing through the first link through oblong openings provided in said side walls. The set of links further comprises: - a second lateral link, said first and second lateral links being arranged on either side of the first link, facing each other, the first lateral link and the second lateral link are securely connected to each other by said first pin (passing through the first central link through the oblong openings provided in each of said lateral walls), so that the first central link is movable at least in the longitudinal direction, for example in longitudinal translation, relative to the lateral links, - a second pusher housed in the second lateral link, said first and second pushers being arranged to control the first locking system and move it from the locked position to the unlocked position.

[0008] In a second variant, the set of links further comprises: - a second link, located in the extension of the first central link, between the first and second lateral links, the latter being offset longitudinally relative to the first and second links, said second link comprising also side walls, the first side link and the second side link being securely connected to each other by a second pin passing through the second link through oblong openings provided in said side walls, so that the second link is movable in longitudinal translation relative to the side links, - a second locking system housed in the second central link, capable of locking the relative longitudinal position of the second central link with respect to the first and second lateral links, said second locking system being capable of occupying a locked position and an unlocked position, the first and second pushers are arranged to simultaneously control the first and second locking systems. The second locking system in the locked position occupies a locking state in which the second locking system blocks a movement at least in the longitudinal direction of the second central link relative to the first and second lateral links. The second locking system in the unlocked position occupies an unlocking state in which the second locking system allows free movement at least in the longitudinal direction of the second central link relative to the first and second lateral links. According to one embodiment embodiment, the second link has a first end and a second end with reference to the longitudinal axis, and the second link comprises a hinge at the first end and at the second end. In particular, the second link may comprise a first pivot joint at the first end and a second pivot joint at the second end. Thus, the second link may be part of a chain of links which forms a bracelet. In particular, the second link may be hinged with the first link. Preferably, the second link may be hinged with the first link in a pivot connection.

[0009] In an additional variant, the first locking system comprises a pair of sleeves sliding on the first pin, and a pair of studs arranged integrally inside the first central link, each stud being intended to cooperate with a sleeve. Either the sleeves or the studs alternately comprise a lock each and the others of the studs and the sleeves comprise a stop structure each, capable of cooperating with the lock, said stop structure being provided with several discrete elements defining at least two relative positions of cooperation between the lock and the stop structure.

[0010] Advantageously, the second locking system comprises a pair of sleeves sliding on the second pin, and a pair of studs arranged integrally inside the second central link, each stud being intended to cooperate with a sleeve. Either the sleeves, either the studs alternately comprise a lock each and the other studs and sleeves comprise a stop structure each, capable of cooperating with the lock, said stop structure being provided with several discrete elements defining at least two relative positions of cooperation between the lock and the stop structure.

[0011] Advantageously, the lock and the stop structure of the first locking system and of the second locking system when present, are formed by a portion of a rack.

[0012] Advantageously, the sleeves of the first locking system and of the second locking system when present, are mounted to move against a spring.

[0013] Advantageously, the first pusher and the second pusher are guided on the first pin and on the second pin when it is present.

[0014] Advantageously, the first and second pushers comprise a tubular portion acting on said sleeves of the first locking system and of the second locking system when it is present.

[0015] The invention also relates to a bracelet, in particular a watch bracelet, comprising a set of links according to the invention. Brief description of the drawings

[0016] Other details of the invention will appear more clearly on reading the following description, made with reference to the appended drawing in which: - figures 1 to 4 are top views of a set of links according to a first embodiment of the invention, in different positions illustrating the use thereof, and - figures 5 and 6 illustrate two other embodiments, - figures 7 and 8 illustrate variants of the implementation of figures 1 to 4. Method of carrying out the invention

[0017] The invention relates to a set of links for a multi-link bracelet. According to a first embodiment, the bracelet typically comprises three rows, a central row and two lateral rows on either side of the central row. The longitudinal axis is defined as the main axis of the bracelet. The set of links according to the invention makes it possible to adjust the length of the bracelet, by modifying the relative longitudinal position between at least one central link and a pair of lateral links.

[0018] Figures 1 and 2 show a set of links according to a first embodiment of the invention, in a first position, corresponding to a short configuration, while Figures 3 and 4 correspond to a long configuration.

[0019] More particularly, a first central link 10 has been shown comprising side walls, with reference to the longitudinal axis. This central link 10 is hollow, and has or receives a certain number of functional elements which will be detailed below.

[0020] The set of links also comprises a first lateral link 12 and a second lateral link 14, arranged on either side of the first central link 10, facing each other. The first lateral link 12 and the second lateral link 14 are securely connected to each other by a first pin 16, or bar (in the sense of a small bar) passing through the first central link 10 through oblong openings 18 formed in said side walls. The oblong of the openings is parallel to the longitudinal axis, so that the first central link 10 is movable in longitudinal translation relative to the lateral links 12 and 14, by displacement of the first pin 16 in the oblong openings 18.

[0021] To prevent the first central link 10 from moving in an uncontrolled manner relative to the lateral links 12 and 14, the set of links according to the invention further comprises a first locking system 20 at least partially housed in the first central link 10, capable of locking the relative longitudinal position of the first central link 10 relative to the first 12 and second 14 lateral links. The first locking system 20 is capable of occupying a locked position in which the relative longitudinal position of the first link central link 10 relative to the first 12 and second 14 side links is locked, and an unlocked position in which the relative longitudinal position of the first central link 10 relative to the first 12 and second 14 side links is unlocked, i.e. the first central link 10 can be moved relative to the pair formed by the first side link 12 and the second side link 14.

[0022] To control the first locking system 20, a first 22a and a second 22b pusher are housed respectively in the first lateral link 12 and the second lateral link 14.

[0023] In more detail, the first locking system 20 comprises a pair of sleeves 24 sliding on the first pin 16. A coil-type spring 26, for example, is mounted on the pin 16, interposed between the two sleeves 24. The length of the spring 26 is adjusted so that it maintains the sleeves 24 in a distal position on the pin 16. This distal position is defined by stops, sleeves against the pushers, and pushers against the side links.

[0024] Each pusher 22 is guided on the first pin 16 to ensure its functional movement. Each pusher 22 comprises for this purpose a tubular portion 28, also slidably mounted on the first pin 16 and having a portion opposite each sleeve 24, respectively, so as to be able to act on said sleeves 24. In other words, pressure exerted on a pusher 22 causes the displacement of the corresponding tubular portion 28, which also moves the sleeve 24 in contact with which it is located, by compressing the spring 26. Advantageously, the tubular portion 28 is made in one piece with the corresponding pusher 22. Also advantageously, the spring 26 makes it possible to press the sleeves 24 and the tubular portions 28 at each end of the first pin 16. The dimensions are adjusted so that the pusher, in its rest position illustrated in FIG. 1, in which it is held by the spring 26, is flush with or slightly protrudes from the surface of the lateral link in which it is housed. The spring 26 also ensures the automatic return of the pushers 22 to their rest position, after they have been actuated.

[0025] The first locking system 20 further comprises a pair of studs 30 arranged integrally inside the first central link 10, each stud 30 being intended to cooperate with a sleeve 24. For its assembly in the link, the illustrated embodiment proposes that each stud 30 has at least one slot 32, forming a mortise, while the first link has at least one projecting element 34, of complementary shape, forming a tenon, shaped to cooperate with the mortise. Different assemblies of this type or alternative types are also possible for assembling the studs 30 in the link. In the example, there are two slots and two projecting elements for each stud 30.

[0026] In the proposed example, the sleeves 24 are each secured to a lock 36, taking the form of a rack portion, extending transversely relative to the axis of the sleeve 24. The studs 30 comprise a stop structure 38 provided with several discrete elements. In the example, the stop structure 38 is also formed by a rack portion, the teeth of which define the discrete elements. These define at least two relative positions of cooperation between the lock 36 and the stop structure 38. The rack portions are parallel to each other and orthogonal to the first pin 16. In addition, the teeth of the racks allow them to mesh with each other, without perceptible play.

[0027] Other configurations could be used to produce the lock 36 and the stop structure 38. For example, with a finger, forming a lock, capable of being inserted into openings or between pillars, which form the stop structure. One of the lock and the stop structure may be integral with the sleeve and the other integral with the central link, or vice versa.

[0028] In operation, we start from the situation illustrated in figure 1, the first central link 1 is in a close position relative to the lateral links 12 and 14, corresponding to a “short” configuration for the bracelet.

[0029] When a user presses the pushers 22, in a natural manner by simultaneously actuating the two opposite pushers between the thumb and index finger, he brings the sleeves 24 closer to each other against the spring 26 and separates the locks 36 from their respective stop structure 38. The first locking system 20 is then in the unlocked position, in the position illustrated in Figure 2.

[0030] The user can then move the first central link 10 away from the side links 12 and 14, either by exerting a slight pull on the bracelet while still holding the pushers 22 pressed, or by contracting the wrist, while also still holding the pushers pressed. We are then in the position illustrated in Figure 3.

[0031] Then, the user releases the pushers 22. Under the action of the spring 26, the sleeves 24 return to their rest position and the locks 36 engage in their respective stop structure 38. The relative longitudinal position of the central link 10, and the side links 12 and 14, is different and the configuration is larger than that illustrated in Figure 1. The first locking system 20 is again in the locked position, the first central link 10 is in a remote position relative to the side links 12 and 14, corresponding to a “long” configuration for the bracelet. The situation is illustrated in Figure 4.

[0032] For interconnection to subsequent side links, or even to a watch case, the central link is crossed by an additional pin (not shown), arranged in a housing 40. The additional pin is fixed in translation, along the longitudinal axis relative to the central link. A return spring 42 connects the first pin 16 to the additional pin or to the housing 40, respectively. The return spring 42 tends to bring back the first central link 10 in its short configuration. The attachment of the return spring 42 on the first pin 10 can be inserted in the turns of the spring 26.

[0033] Advantageously and as shown in the illustrated example, the set of links comprises a second central link 10.2, located in the extension of the first central link 10 along the longitudinal axis, between the first 12 and second 14 lateral links. The latter are offset longitudinally relative to the first 10 and the second 10.2 central links. The bracelet can thus be lengthened by moving one and / or the other of the first and second central links, relative to the first 12 and second 14 lateral links, which gives more latitude and amplitude to the adjustment.

[0034] We find a construction similar to what has just been described for the first central link 10, the similar elements bearing the same number, followed by .2.

[0035] Thus, the second central link 10.2 also comprises side walls. The first side link 12 and the second side link 14 are securely connected to each other by a second pin 16.2 passing through the second central link 10.2 through oblong openings 18.2 provided in the side walls, so that the second central link 10.2 is movable in longitudinal translation relative to the side links 12, 14. The second pin 16.2 is parallel to the first pin 16 which passes through the first central link 10. The same pair of side links intervenes in relation to the first central link 10 and to the second central link 10.2.

[0036] To prevent the second central link 10.2 from moving in an uncontrolled manner relative to the lateral links 12 and 14, the set of links according to the invention further comprises a second locking system 20.2 at least partially housed in the second central link 10.2, capable of locking the relative longitudinal position of the second central link 10.2 relative to the first 12 and second 14 lateral links. The second locking system 20.2 is capable of occupying a locked position in which the relative longitudinal position of the second central link 10.2 relative to the first 12 and second 14 lateral links is locked, and an unlocked position in which the relative longitudinal position of the second central link 10.2 relative to the first 12 and second 14 lateral links is unlocked.It may be noted that the first central link 10 is movable in a pivot connection around the first pin 16, and that the second central link 10.2 is movable in a pivot connection around the second pin 16.2. Consequently, the first central link 10 and the second central link 10.2 are each movable in a pivot connection relative to the first lateral link 12 and relative to the second lateral link 14.

[0037] To control the second locking system 20.2, the first 22a and the second 22b pushers, housed respectively in the first 12 and the second 14 lateral links, advantageously act on the first and second locking systems simultaneously, as will be understood below.

[0038] As described for the first locking system 20, the second locking system 20.2 comprises a pair of sleeves 24.2 sliding on the second pin 16.2. A coil-type spring 26.2, for example, is mounted on the second pin 16.2, interposed between the two sleeves 24.2. The length of the spring 26.2 is adjusted so that it holds the sleeves 24.2 in a distal position on the second pin 16.2. This distal position is defined by stops, sleeves against the pushers, and pushers against the side links.

[0039] Each pusher 22 is guided on the second pin 16.2 to ensure its functional movement. Each pusher 22 comprises for this purpose a tubular portion 28.2, also slidably mounted on the second pin 16 and having a portion facing each sleeve 24.2, respectively, so as to be able to act on said sleeves 24.2. In other words, pressure exerted on a pusher 22 causes the movement of the corresponding tubular portion 28.2, which also moves the sleeve 24.2 in contact with which it is located, by compressing the spring 26.2. Advantageously, the tubular portion 28.2 is made in one piece with the corresponding pusher 22 and with the corresponding tubular portion 28 of the first locking system. Thus, a pusher can control the movement of the sleeves of the first and second locking systems. Also advantageously, the spring 26.2 makes it possible to press the sleeves 24.2 and the tubular portions 28.2 at each end of the second pin 16.2. The dimensions are adjusted so that the pusher, in its rest position illustrated in Figure 1, in which it is held by the spring 26.2, is flush with or slightly protrudes from the surface of the side link in which it is housed. The spring 26.2 also ensures the automatic return of the pushers 22 to their rest position. The springs 26 and 26.2 are preferably identical so that the pushers receive a very similar force from each, to prevent them from becoming skewed.

[0040] The second locking system 20.2 further comprises a pair of studs 30.2 arranged integrally inside the second central link 10.2, each stud 30.2 being intended to cooperate with a sleeve 24.2. For its assembly in the link, the illustrated embodiment proposes that each stud 30.2 has at least one slot 32.2, forming a mortise, while the second link has at least one projecting element 34.2, of complementary shape, forming a tenon, shaped to cooperate with the mortise. Different assemblies of this type or alternative types are still possible to assemble the studs in the link. In the example, we have two slots and two protruding elements for each stud 30.2.

[0041] In the proposed example, the sleeves 24.2 are each secured to a lock 36.2, taking the form of a rack portion, extending transversely relative to the axis of the sleeve 24. The studs 30.2 comprise a stop structure 38.2 provided with several discrete elements. In the example, the stop structure 38.2 is also formed by a rack portion, the teeth of which define the discrete elements. These define at least two relative positions of cooperation between the lock 36.2 and the stop structure 38.2. The rack portions are parallel to each other and orthogonal to the second pin 16.2. In addition, the teeth of the racks allow them to mesh with each other, without perceptible play.

[0042] Other configurations could be used to produce the lock 36 and the stop structure 38. For example, with a finger, forming a lock, capable of being inserted into openings or between pillars, which form the stop structure. One of the lock and the stop structure may be integral with the sleeve and the other integral with the central link, or vice versa.

[0043] The operation of the second locking member is identical to that described above with regard to the first locking member and can be repeated mutatis mutandis.

[0044] Since the first 22a and second 22b pushers are arranged to simultaneously control the first 20 and second 20.2 locking systems, when the user operates the pushers, if he simply pulls on the bracelet, the two central links 10 and 10.2 will switch to the long configuration at the same time. To switch to the short configuration, the user presses the pushers 22a and 22b and acts alternately or simultaneously on the two central links 10 and 10.2.

[0045] It is possible to provide central links with an opening on one side, to assemble the various components of the locking systems, this opening then being closed by a cover engaged against the side walls. The cover can participate in guiding the movable pins in translation.

[0046] The fixed pins may allow assembly to other side links, or to a watch case, the adjacent links may also include other sets of links according to the invention to give more latitude to the length adjustment.

[0047] Figure 5 shows another embodiment of a set of links according to the invention. This corresponds to another configuration of a link bracelet, comprising five rows of links. There are thus two lateral, external rows formed of lateral links 120 and 140 which functionally correspond to the lateral rows of links lateral links 12 and 14 of the first embodiment described above. There are also two intermediate rows, located, respectively, between a lateral row and the central row. Functionally, the intermediate links 125 and 135 forming first and second intermediate rows respectively contain the locking members 20 located in the central link 10 of the first embodiment. More particularly, one of the studs 300 of the pair of studs, and one of the sleeves 240 of the pair of sleeves of the first embodiment above, are arranged in a link 125 of a first intermediate row, the other 305 of the studs of the pair of studs, and the other 245 of the sleeves of the pair of sleeves, being arranged in the corresponding link 135 of the second intermediate row.

[0048] In more detail, with reference to figure 5, we therefore find a first lateral link 120 of a first lateral row, secured to a pin 16 which passes through a first intermediate link 125 of a first intermediate row, then which passes through a first central link 10, a first intermediate link 135 of a second intermediate row, then a first lateral link 140 of a second lateral row.

[0049] As described above, the intermediate links contain the locking systems 20. In the first intermediate link 125 of the first intermediate row, there is a stud 300 arranged securely inside the link, the stud being provided with a stop structure 38. The latter is intended to cooperate with a lock 36, taking the form, for example, of a rack, mounted on a sleeve 240, movable on the pin 16. A symmetrical arrangement is found in the first intermediate link 135 of the second intermediate row. A spring (or springs) 26 is provided, for example in the first central link, to push the racks of the locks 26 against their respective stop structure 38.

[0050] As described previously, the first lateral links 120 and 140 of the first and second lateral rows comprise pushers 22, which make it possible to act on the sleeves 240. The arrangement of the pushers, which cooperate with the sleeves, will not be described again in detail, what was described previously being repeated in a similar manner in the example of FIG. 5.

[0051] We can also find a second pin 16.2 connecting the first 120 and the second 140 lateral links, through a second link 125.2 of the first intermediate row, the first central link 10 and a second link 135 of the second intermediate row. We can also find in the second links of the first and second intermediate rows, locking members, similar to those described for the first links of the intermediate rows, advantageously also actuated by the same pushers.

[0052] Additional pins are provided to connect these links to adjacent links, or to a box or loop. A return spring 42 may be provided in each intermediate link to connect the pin 16 or 16.2 to a fixed pin, to ensure automatic return to the short configuration position, by actuating the pushers.

[0053] In an additional variant, illustrated in Figure 6, there is a bracelet having a three-row configuration, as in the first embodiment. The difference of this variant compared to the first described above, is that the actuation of the locking systems 20 and 20.2 is done by a single pusher 22. The pair of locks 36 is arranged on a single sleeve 24 actuated by the pusher. The racks of the locks are oriented in the same direction, opposite their respective stud 30 and the stop structure 38 which they comprise. The racks are oriented in the direction of the push button 22. Thus, to carry out an unlocking, pressure is applied to the pusher in order to move the racks of the locks 36 away from their stud 30, against a spring member 26, located at the end of the sleeve, for example. The connection between the pusher and the sleeve can be made as proposed above.

[0054] As described above, it is advantageous to have a second similar locking system, located in a second central link 10.2 and controlled by the same pusher 22, in order to have two possibilities for adjusting the length of the bracelet.

[0055] Additional pins are provided to connect these links to adjacent links, or to a box or loop. A return spring 42 may be provided to connect the pin 16 to a fixed pin, in order to ensure automatic return to the short configuration position, by actuating the pushers.

[0056] All of the different embodiments above have in common the fact of having at least two partially juxtaposed links located in different rows. One of the links comprises a pusher for controlling a locking system, for example by acting on a movable sleeve sliding on a pin which connects the two juxtaposed links. This movable sleeve is integral with a lock or a stop structure, intended to cooperate with, respectively, either a stop structure or a lock, integral with a stud fixed in the other of the links. The stud and the sleeve participate together in forming the locking system.

[0057] We thus find a set of links including: - a first link 10 comprising side walls, with reference to a longitudinal axis defined by the axis of a bracelet in which said set of links is intended to be integrated, - a first lateral link 12, arranged laterally with respect to the first link, the first link is connected to the first lateral link so that they are movable in longitudinal translation, - a first locking system 20 housed in the first link, capable of locking the relative longitudinal position of the first link with respect to the first lateral link, said first locking system being capable of occupying a locked position and an unlocked position, - a first pusher 22 housed in the first lateral link and arranged to control the locking system and move it from a locked position to an unlocked position.

[0058] Such a set of links is functional, even if with only two links, the guidance of the sliding connection may not be optimal. It will be noted that the person skilled in the art can propose other solutions than that described above, to achieve this sliding connection between the two links, for example with a slide between the two links or various holding solutions, such as rails / grooves.

[0059] Figure 7 illustrates a first variant of the embodiment of Figures 1 to 4, in which only the first central link 10 is equipped with a locking system 20. Unlike the embodiment of Figures 1 to 4, the second central link 10.2 does not include a locking system. However, the first pusher 22a and the second pusher 22b are each slidable on the first pin 16 and on the second pin 16.2. The first pin 16 and the second pin 16.2 also provide a pivot connection with the first central link respectively. 10 and the second central link 10.2 with respect to the first lateral link 12 and the second lateral link 14.

[0060] Figure 8 illustrates a second variant of the embodiment of Figures 1 to 4, in which only the first central link 10 is equipped with a locking system 20, and in which only one lateral link is provided. Unlike the embodiment of Figures 1 to 4, the second central link 10.2 does not include a locking system, and only the first lateral link 12 is provided. However, the pusher 22b is slidably mounted on the first pin 16 and on the second pin 16.2. In this example, the first pin 16 and the second pin 16.2 are shouldered and driven into the first lateral link 12. The first pin 16 and the second pin 16.2 also provide a pivot connection with the first central link 10 and the second central link 10.2 respectively with respect to the first lateral link 12.Incidentally, a guide or holding plate could be kept between the first central link 10 and the second central link 10.2, replacing the missing lateral link 14, this plate being able to be arranged in recesses formed on the lateral walls of the first central link 10 and the second central link 10.2, in order to hide it while retaining the pivot connections.

Claims

Claims 1. Set of links including: - a first link (10) comprising side walls, with reference to a longitudinal axis defined by the axis of a bracelet in which said set of links is intended to be integrated, - a first lateral link (12), arranged laterally with respect to the first link, the first link is connected to the first lateral link so that they are movable in longitudinal translation, - a first locking system (20) housed in the first link, capable of locking the relative longitudinal position of the first link with respect to the first lateral link, said first locking system being capable of occupying a locked position and an unlocked position, - a first pusher (22) housed in the first lateral link and arranged to control the first locking system and move it from a locked position to an unlocked position.

2. A link assembly according to claim 1, wherein the first link is connected to the first side link by a first pin (16) passing through the first link through oblong openings (18) provided in said side walls, said set of links further comprising: - a second lateral link (14), said first and second lateral links being arranged on either side of the first link, facing each other, the first lateral link and the second lateral link are securely connected to each other by said first pin (16), so that the first central link is movable in longitudinal translation relative to the lateral links, - a second pusher (22) housed in the second lateral link, said first and second pushers being arranged to control the first locking system and move it from the locked position to the unlocked position.

3. A link assembly according to claim 2, further comprising: - a second link (10.2), located in the extension of the first link (10), between the first (12) and second (14) lateral links, the latter being offset longitudinally relative to the first (10) and the second (10.2) links, said second link also comprising lateral walls, the first lateral link and the second lateral link being securely connected to each other by a second pin (16.2) passing through the second link (10.2) through oblong openings (18.2) provided in said walls lateral, so that the second link is movable in longitudinal translation relative to the lateral links, - a second locking system (20.2) housed in the second link, capable of locking the relative longitudinal position of the second link (10.2) with respect to the first (12) and the second (14) lateral links, said second locking system being capable of occupying a locked position and an unlocked position, the first and second pushers are arranged to simultaneously control the first and second locking systems.

4. Set of links according to one of claims 2 or 3, characterized in that said first locking system (20) comprises a pair of sleeves (24) sliding on the first pin (26), and a pair of studs (30) arranged integrally inside the first central link (10), each stud being intended to cooperate with a sleeve, either the sleeves (24), or the studs (30) alternately comprising a lock (36) each and, the others studs and sleeves comprising a stop structure (38) each, capable of cooperating with the lock, said stop structure being provided with several discrete elements defining at least two relative positions of cooperation between the lock and the stop structure.

5. Set of links according to claim 3 or according to claim 4 in its dependence on claim 3, characterized in that said second locking system (20.2) comprises a pair of sleeves (24.2) sliding on the second pin (16.2), and a pair of studs (30.2) arranged integrally inside the second central link (10.2), each stud being intended to cooperate with a sleeve, either the sleeves (24.2), or the studs (30.2) alternately comprising a lock (36.2) each and, the others studs and sleeves comprising a stop structure (38.2) each, capable of cooperating with the lock, said stop structure being provided with several discrete elements defining at least two relative positions of cooperation between the lock and the stop structure.

6. Assembly according to one of claims 4 or 5 characterized in that the lock (36, 36.2) and the stop structure (38, 38.2) of the first locking system and of the second locking system when it depends on claim 5, are formed by a portion of rack.

7. Assembly according to one of claims 4 or 5, characterized in that said sleeves (24, 24.2) of the first locking system and of the second locking system when it depends on claim 5, are mounted to move against a spring (26, 26.2).

8. Assembly according to one of claims 2 to 7, characterized in that said first (22a) and second (22b) pushers are guided on the first pin (16) and on the first pin (16) and the second pin (16.2).

9. Assembly according to one of claims 4 to 8, characterized in that said first (22a) and second (22b) pushers comprise a tubular portion (28, 28.2) acting on said sleeves (24, 24.2) of the first locking system and of the second locking system when it depends on claim 5.

10. Bracelet, in particular a watch bracelet, comprising a set of links according to one of claims 1 to 9.

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