EP3058840B1 - Expandable wristwatch - Google Patents

Description

Field of the invention

The invention relates to a watch comprising, fixed to a box, a bracelet comprising, between an opposite first end and a second end, at least one extensible strand, said bracelet comprising at said second end a loop which comprises at least one surface of stop arranged to cooperate, in a hooking position, or with a box assembled to said bracelet at its said first end, or with a second complementary stop surface that includes said bracelet in the vicinity of its said first end, said loop being arranged to surround said box at least on a first side of said box, said loop being formed by said at least one extensible strand or by an attached loop.

The invention relates to the field of devices attached to the human body, in particular time measuring devices such as watches, or scientific devices such as radio-activity recorders or the like, and the field of jewelery or jewelery bracelets. fashion items.

Background of the invention

Bracelets, and especially watchbands, are generally of dimensions adjusted to the morphology of the user. Setting ranges are limited. Few wristbands offer quick donning or withdrawal possibilities, while ensuring a good fit and support during wear.

Traditional clasps require delicate handling, whether they are buckles with buckles, or mechanisms with folding clasp. In particular, handling with gloves is impossible. These clasps are moreover expensive, and generally comprise blunt protruding parts.

Bracelets made entirely of elastic material do not always guarantee good performance, especially when the user, for example a sportsman, submits his watch or his bracelet to strong accelerations.

The document FR 3,004,898 A1 in the name of DAVINSY describes a watch strap having a loop comprising two flanges articulated to one another closing peripherally around the case of a watch.

The document U.S. 2,512,992 A in the name of BARRE Robert describes a watch strap having an end loop sized to completely surround a watch case, cooperate on one side in engagement with a groove of the watch case, and clip on the opposite side on a notch of the box.

The document US2011 209373 A1 in the name of PADGETT / DISNEY describes a bracelet with adjustable length, with a first element having a central portion, and a second element with a body having a loop having an inner surface, which is arranged to cooperate with the outer side wall of the part central, which is removably coupled to the loop, in particular by snapping. To allow for length adjustment, the second element includes both an internal tape adjuster and an external tape adjuster removably coupled to the inner tape adjuster.

The document FR 767 942 A in the name of CARTIER describes a watch clasp, one of which is formed by the watch case, while the other element, constituted by a loop or a frame, is arranged to engage with the box.

The document FR 968 749 A In the name of SCHLUMBERGER describes a bracelet attached at one end to one side of a watch case, and which has at the other end a frame intended to fit on this box.

The document JP 60 132501 A in the name of ORIENT TOKEY WATCHES describes a watchband having, at one end a watch case, and at the other end a ring arranged to grip the box at a groove that includes the latter.

Summary of the invention

The invention proposes to develop a bracelet, more particularly a watchband, without clasp in the usual sense of the term, having a large range of adjustment, easy to put on and remove by the user, and suitable for a professional or sports use.

For this purpose, the invention relates to a watch according to claim 1.

Brief description of the drawings

• la figure 1 représente, de façon schématisée et en perspective, une montre selon l'invention, comportant un bracelet selon l'invention, équipé d'un brin extensible élastique se dédoublant des deux côtés de la boîte de montre, et comportant une boucle, qui vient en prise sur un côté de la boîte de montre, et comporte des surfaces d'arrêt en relief coopérant avec des surfaces d'arrêt complémentaire en relief inverse de la boîte de montre, ces reliefs et reliefs inverses étant aussi conçus pour assurer un clipage en position d'accrochage, le brin extensible étant présenté dans une position d'élongation maximale, ou bien avant la mise en place de la boucle dans son logement de la boîte, ou bien, à l'inverse, lors de l'enlèvement de la montre par l'utilisateur;
• la figure 2 représente, de façon schématisée et en perspective, une montre selon l'invention, comportant un bracelet selon l'invention, équipé d'un brin extensible élastique se dédoublant des deux côtés de la boîte de montre, et comportant une boucle, qui vient directement en prise sur un côté de la boîte de montre, dans une gorge transversale dans laquelle cette boucle est immobilisée, ici représentée dans sa position d'accrochage correspondant au porté de la montre;
• la figure 3 représente, de façon similaire à la figure 2, la même montre, vue de l'autre côté de la boîte, où est visible une barrette de guidage des brins élastiques latéraux, solidaire de la boîte de montre ;
• les figures 4 et 5 représentent, de façon similaire aux figures 2 et 3, une variante où la boucle comporte un fourreau muni d'une languette de préhension pour un maniement commode, en particulier lors de l'extraction ; la figure 6 est une autre vue de la même montre ;
• la figure 7 représente, de façon similaire à la figure 2, une autre variante où la boucle comporte une pince munie de doigts de manoeuvre formant aussi ensemble une languette de préhension ;
• les figures 8 et 9 représentent, de façon schématisée et en vue de face et de dessus, un bracelet selon l'invention, comportant un brin extensible intermédiaire entre deux parties rigides, dont l'une porte un élément saillant auquel vient s'accrocher une boucle que comporte la partie antagoniste ;
• la figure 10 représente, de façon schématisée et en vue de face, une variante du bracelet des figures 8 et 9, auquel est articulé à un premier côté une boîte de montre, laquelle porte de l'autre côté un maillon articulé servant de guide à la partie du bracelet formant boucle, les brins extensibles passent ici au-dessus de la boîte de montre ;
• les figures 11 et 12 représentent, de façon schématisée et en vue de face et de dessus, une montre selon l'invention, comportant un brin extensible terminal dont la boucle se loge dans une gorge d'une boucle rapportée qui vient se bloquer sur une face latérale en dépouille de la boîte de montre, les brins latéraux étant maintenus sur les côtés de la boîte de montre dans des gorges longitudinales que comporte cette dernière ;
• les figures 13 et 14 représentent, de façon schématisée et en vue de face et de dessus, une montre selon la variante de la figure 2, où. Comme sur la variante des figures 11 et 12, une extrémité du bracelet est fixée à la boîte de montre qui forme un passant sur sa face inférieure, et un repli du bracelet étant immobilisé à une extrémité de ce passant, de façon à s'opposer à la traction du brin extensible lors de l'élongation du bracelet ;
• les figures 15 à 20 illustrent une variante particulière de l'invention, avec un brin extensible d'extrémité formant une boucle avec une boucle rapportée, laquelle coopère avec un insert articulé avec la boîte de montre, tandis qu'à l'autre extrémité le bracelet porte une barrette de fixation du brin extensible, lequel est guidé par un guide également articulé avec la boîte de montre :
• la figure 15 est une vue éclatée en perspective ;
• la figure 16 est une vue assemblée en perspective, en position d'arrêt de la boucle sur la boîte de montre ;
• la figure 17 est une vue de face, dans la même position ;
• la figure 18 est une vue de droite ;
• la figure 19 est une vue de dessus ;
• la figure 20 est une coupe selon le plan AA de la figure 18.

Other features and advantages of the invention will appear on reading the detailed description which follows, with reference to the appended drawings, in which:

• the figure 1 represents, schematically and in perspective, a watch according to the invention, comprising a bracelet according to the invention, equipped with an elastic stretchable strand splitting on both sides of the watch case, and comprising a loop, which comes into taken on one side of the watch case, and has raised stop surfaces co-operating with complementary stop surfaces in inverse relief of the watch case, these reliefs and reverse reliefs being also designed to ensure clipping in position hooking, the stretchable strand being presented in a position of maximum elongation, or before the establishment of the loop in its housing of the box, or, conversely, during the removal of the watch by the user;
• the figure 2 represents, schematically and in perspective, a watch according to the invention, comprising a bracelet according to the invention, equipped with an elastic stretchable strand splitting on both sides of the watch case, and comprising a loop, which comes directly engaged on one side of the watch case, in a transverse groove in which this loop is immobilized, here shown in its hooking position corresponding to the wear of the watch;
• the figure 3 represents, similarly to the figure 2 the same watch, seen from the other side of the box, where is visible a guide bar of the lateral elastic strands, integral with the watch case;
• the figures 4 and 5 represent, similarly to figures 2 and 3 , a variant where the loop comprises a sleeve provided with a gripping tab for convenient handling, particularly during extraction; the figure 6 is another view of the same watch;
• the figure 7 represents, similarly to the figure 2 another variant where the loop comprises a clamp provided with operating fingers also forming a gripping tab;
• the Figures 8 and 9 represent schematically and in front view and from above, a bracelet according to the invention, comprising an extensible strand intermediate between two rigid parts, one of which carries a projecting element which is hooked a loop that includes the part antagonist;
• the figure 10 represents, schematically and in front view, a variant of the bracelet of Figures 8 and 9 , which is hinged on one side a watch case, which on the other side has an articulated link serving as a guide to the part of the bracelet forming a loop, the extensible strands pass here above the watch case;
• the Figures 11 and 12 represent, in a schematic manner and in front view and from above, a watch according to the invention, comprising a terminal extensible strand whose loop is housed in a groove of an attached buckle which is locked on a side face undercut of the watch case, the lateral strands being held on the sides of the watch case in longitudinal grooves contained therein;
• the Figures 13 and 14 represent, schematically and in front view and from above, a watch according to the variant of the figure 2 , or. As on the variant of Figures 11 and 12 , one end of the bracelet is attached to the watch case which forms a loop on its underside, and a fold of the bracelet being immobilized at one end of this passer, so as to oppose the traction of the stretchable strand at the end. elongation of the bracelet;
• the Figures 15 to 20 illustrate a particular variant of the invention, with an extensible end strand forming a loop with a buckle reported, which cooperates with an articulated insert with the watch case, while at the other end the bracelet carries a bar of attachment of the extensible strand, which is guided by a guide also articulated with the watch case:
• the figure 15 is an exploded view in perspective;
• the figure 16 is an assembled perspective view, in stopping position of the buckle on the watch case;
• the figure 17 is a front view, in the same position;
• the figure 18 is a right view;
• the figure 19 is a view from above;
• the figure 20 is a cut according to the AA plan of the figure 18 .

Detailed Description of the Embodiments Referred

The invention consists in arranging a bracelet so that a loop, which this bracelet comprises, can come over a salient element that includes this bracelet or an element that it carries, such as a watch case, and exercise a tensile force ensuring good maintenance of the whole when the user wears the set on his wrist.

More particularly, in a preferred application, the invention consists in arranging a watch strap so that a buckle, which includes bracelet, can come over the watch case to take a bearing on a protruding element, and in particular on one side of this box, and exert a traction force ensuring a good maintenance of the watch case when the user wears all on his wrist.

For this purpose, the bracelet comprises at least one extensible strand, and a loop which may be, in different variants, either a deformable element such as such an extensible strand, or a dimensionally stable element such as a rigid bar or the like , which can then be worn indifferently by an extensible strand or by a non-stretchable part of the bracelet.

Naturally one can combine the possibility of a support of the buckle on a watch case and a support on a projecting element of the bracelet, so as to be able to adjust the traction force. It is likewise possible to arrange a plurality of remote projecting elements to allow the user to choose the one that allows the desired traction force, as can also be defined on a watch case several possible receiving surfaces of this loop. It will be mentioned, again, the possibility of using a loop having a plurality of bearing surfaces, capable of cooperating in support with the same box surface, or with the same projecting element of the bracelet.

The invention is described below in a simplified embodiment, where a single support surface of the loop cooperates with a single surface, as the case of a watch case, or bracelet. It is described successively for a single bracelet, and for a watch equipped with its bracelet. Naturally, the characteristics of one application can be transposed to another.

The invention also relates to a bracelet 3 which comprises, between a first end 31 and a second end 32, at least one extensible strand 4.

In the variants shown, the bracelet 3 comprises at least one other strand, which is less extensible than this at least one extensible strand 4. The strand 4 is then more extensible than any other said strand of the bracelet 3.

In certain variants, at least one said other strand is not stretchable, that is to say that this other strand is of invariant length (excluding its ordinary expansion and the play of the stitches or weaving in the case of a textile bracelet) under the action of a traction printed by the user. This other strand may nevertheless be flexible, and conventionally made of leather, plastic material, metal, or the like.

According to the invention, this bracelet 3 comprises, at the second end 32 opposite the first end 31, a loop 5 which comprises at least one stop surface 50 arranged to cooperate, in a hooking position, or with a less a first complementary stop surface 20 of a box 2 assembled to the bracelet 3 at its first end 31, or with a second complementary stop surface 30 that includes the bracelet 3 in the vicinity of its first end 31. This loop 5 comprises whether it is rigid, or constitutes if it is flexible, a recess 51 which is arranged to surround a projecting part that includes the bracelet 3 and which constitutes the second complementary stop surface 30.

The loop 5 may have different shapes, for example a simple L-shaped hook, or a U, or an O. The essential thing is that the stop surface 50 is firmly held in the service position.

Preferably, the extensible strand 4 is sized to provide traction greater than 2N on the loop 5 for any user wrist diameter between a given minimum diameter DMIN and maximum diameter DMAX.

In a variant, the second complementary stop surface 30 comprises at least one housing and / or a lug arranged to cooperate in a complementary manner with a lug and / or a housing that comprises the stop surface 50 of the buckle 5.

In a variant, at least one stop surface 50 is arranged to cooperate by clipping, in the hooking position, with at least a second complementary stop surface 30.

In a variant, the loop 5 comprises gripping means 52 arranged to facilitate the extraction of the loop 5 during an extension maneuver said bracelet 3 for removal.

In a variant, the loop 5 comprises resilient clamping means 53 arranged to improve the fastening of the loop 5 to the complementary stop surface and / or to facilitate the extraction of the buckle 5 during a maneuver. extension of the bracelet 3 for its removal.

In a variant, the bracelet 3 comprises at least one articulated link carrying a second complementary stop surface 30.

In a variant, at least one extensible strand 4 comprises an elastic strap of substantially circular section, forming, at the second end 32 of the bracelet 3, two strands 41, 42 arranged to extend substantially parallel and joined to the distal end of the bracelet 3 to form the loop 5.

In a variant, an extensible strand 4 constitutes the entire second end 32, and itself forms the loop 5.

In another variant, the second end 32 is rigid, and comprises the loop 5 and its recess 51.

In another variant, the extensible strand 4 may constitute the entire bracelet 3, but this variant is less convenient for fast donning.

The extensible strand 4 can be made in different ways. In a preferred embodiment illustrated by the figures the stretchable strand 4 is elastic, and may be made of an elastic material such as rubber or the like, or in the form of a spring or bellows, or the like.

In another variant not illustrated in the figures, the extensible strand 4 is in the form of a combination of sliding elements relative to each other, and held relative to one another by a friction or the like, these elements being combined with an elastic return means such as a spring arranged to exert the required traction force, or preferably with an eccentric mechanism which, during a tilting, exerts the corresponding effort.

The invention more particularly relates to a watch 1 comprising, fixed to a box 2, such a bracelet 3 comprising at least one extensible strand 4.

According to the invention, this bracelet 3 comprises a loop 5, which is then arranged to surround the box 2, at least on a first side 21 of this box 2. This loop 5 is formed by an extensible strand 4, or by a loop reported 59 fixed on an extensible strand 4, or by a buckle reported 59 on another part of the bracelet 3.

This loop 5 comprises a stop surface 50, which is arranged to cooperate, in at least one attachment position, with, or at least a first complementary stop surface 20 of the first side 21 of the box 2, or a second complementary stop surface 30 that the bracelet 3 comprises.

Preferably, the stop surface 50 and the complementary stop surface 20 or 30, as the case may be, are transverse, that is to say substantially perpendicular to a longitudinal direction along which the bracelet 3 extends. flat. Naturally, the loop 5 can cooperate with a plurality of surfaces of the box 2, or a boss that includes the bracelet 3.

Preferably, the extensible strand 4 is sized to provide traction greater than 2N on the loop 5 for any user wrist diameter between a given minimum diameter DMIN and maximum diameter DMAX.

Preferably, the bracelet 3 is fixed to the box 2 at a first end 31, and extends from a first side 21 of the box 2. In the figures, the first end 31 is fixed under the box 2, between the box and the wrist of the user.

The loop 5 is located at a second end 32 opposite said first end 31. The loop 5 comprises if it is rigid, or constitutes if it is flexible, a recess 51 which is arranged to surround the box 2 at least on this first side 21.

In the alternative of a fastening of the loop 5 to the box 2, the first complementary stop surface 20 that the box 2 comprises is on its first side 21. In the alternative of a fastening of the buckle 5 to 3, the second complementary stop surface 30 is in the vicinity of its first end 31.

Preferably, the box 2 comprises, on the first side 21, a rake surface 29 forming at least a part of the first complementary stop surface 20. This rake surface 29 defines an upper ridge which tends to oppose any Unexpected escape of the loop 5 of the housing that it occupies in its hooking position.

In a particular variant, as visible in particular on the figure 1 , the box 2 comprises, said first side 21, at the first complementary stop surface 20, at least a first housing 23 and / or a first lug 24 arranged to cooperate in a complementary manner with a second lug 53 and / or a second housing 54 that includes the stop surface 50 of the loop 5.

In a particular variant, at least one stop surface 50 is arranged to cooperate by clipping, in the hooking position, with at least a first complementary stop surface 20.

In a particular variant, the box 2 comprises, at a second side 22 opposite the first side 21, guide means 6, which are arranged to guide the second end 32 of the bracelet 3 or at least one extensible strand 4, so that the box 2 and the bracelet 3 together constitute, in any position of the loop 5, a closed substantially toric volume. The user can then, very easily, pass the hand in this torus, then extend the extensible strand 4, before hanging the loop 5 to the box 2 or a salient 30.

Advantageously, the watch 1 comprises, at the level of the guide means 6, stop means 7 of the loop 5.

In a variant, at least one extensible strand 4 slides in the guiding means 6. The wristband 3 advantageously comprises a stop surface 33, which is arranged to constitute a limit stop of these guiding means 6.

In a variant, the loop 5 comprises gripping means 52, which are arranged to facilitate the extraction of the loop 5 during an extension maneuver of the bracelet 3 for its removal.

In a particular variant, the loop 5 comprises elastic clamping means 53 which are arranged to improve the attachment of the loop 5 to said box 2 and / or to facilitate the extraction of this loop 5 during a maneuver. extension of the bracelet 3 for its removal. For example, the loop 5 has a split elastic ring having a finger on each side of the slot.

To ensure improved support of the loop 5 in a housing such as a groove, this loop may comprise an elastic surface coating, such as a rubberized sheath or the like, or carry a small-section coil spring, or a split ring, or similar, ensuring a force hold in this groove, in the form of a clipping substantially revolution.

The bracelet 3 may be one-piece, or may comprise one or more articulated links. In a variant, the bracelet 3 comprises at least one articulated link, which carries a second complementary stop surface 30 for example at a boss.

Similarly, in a variant, the box 2 carries guide means 6 at a link, which is articulated at the second side 22.

The box 2 can, in fact, either form a single piece, or be articulated with one or two side links, or have such side links simply fixed in position by a pin pin function, assembly and disassembly very easy.

In a particular variant that can be seen in the figures, at least one extensible strand 4 comprises an elastic strap of substantially circular cross-section, forming, at the second end 32 of the bracelet 3, a U-shaped buckle 5, the lateral branches of which are arranged to extend substantially parallel around the box 2 or on the box 2 and whose transverse branch delimits a recess 51 of the loop 5, and is arranged to cooperate with the stop box 2.

Advantageously, the box 2 comprises at least one longitudinal guide 28 for receiving the extensible strand 4 and / or the loop 5. The figures thus illustrate parallel grooves for receiving two symmetrical parts of an extensible strand 4. A such guidance also ensures a better transverse retention of the loop 5 in the attachment position.

In a variant, the loop 5 completely surrounds the box 2.

The Figures 15 to 20 illustrate a variant of the invention, particularly advantageous because of an excellent retention of the loop 5. The extensible strand 4 end forms a loop 5 with an attached loop 59, which also forms a gripping means 52 to facilitate the hooking and removal maneuvers.

According to the invention, the box 2 comprises, on the side of the first end 31 of the bracelet 3, an insert 26, fixed or / and articulated by an axis 27 passing through a bore 267 of the insert 26, which comprises a first surface complementary stop 20, which is arranged to cooperate in a complementary manner with the stop surface 50 of the attached loop 59. The cut of the figure 20 shows this buckle reported and inserted into the insert 26, which forms a V-shaped housing ensuring perfect maintenance of the loop 5, even under high accelerations.

The box 2 comprises, on the side of the second end 32 of the bracelet 3, a guide 6 which has bores 60 for guiding the two strands 41, 42 forming the extensible strand 40. The guide 6 is also fixed and / or articulated by a axis 27 passing through a bore 67 of the guide 6. The bracelet 3 carries a bar 39, in housings 38 of which are fixed the ends of this extensible strand 4.

In non-illustrated variants, the same loop 5 can cooperate with several different stop surfaces that includes the box 2 and / or the bracelet 3, to provide several adjustment possibilities to the user.

The watch according to the invention is particularly suitable for professional or sports use. Indeed, no blunt part is present: the bracelet is devoid of any folding clasp, and any barb.

In an advantageous arrangement, as visible on the figures 17 or 20 , the bracelet 3 comprises a strand extending under the watch case, arranged to be in contact with the wrist of the user. Preferably it is a strand qualified above other strand, that is to say not extensible. This strand can be glued under the box, or kept under the box by velvet-hook, which allows its rapid exchange.

A shock absorber such as rubber may also be inserted between the bracelet strand and the bottom of the box.

Preferably, when the box 2 encloses an electronic device, in particular a quartz movement and / or a connected watch, any arrangement for attaching a bracelet strand to the bottom of the box 2 comprises a clearance for the insertion of each stack of which the box 2 is equipped.

Indeed, in advantageous variants for the sport, the bracelet 3 comprises several materials. Preferably, at least one strand is made of an aerated material, facilitating the breathing of the skin, and advantageously this material is washable.

In a particular variant, the bracelet comprises two peripheral and substantially parallel hems, each of which encloses, on at least a portion of the periphery of the bracelet, a cord of which at least a portion constitutes an extensible strand 4.

Preferably, all the surfaces of the wrist strap facing the user's wrist are smooth.

In an advantageous variant because of the fastening constraints of the bracelet to the box, the watch 1 comprises a bracelet with a stretchable strand attached to the box 2, and an extensible strand 4 which extends beyond, substantially in the extension non-stretchable strand

The Figures 15 to 20 show a preferred configuration of the invention for a watch 1 according to the invention, which is always in substantially toroidal shape, that the user deforms to put on and remove: in fact, the maintenance of the loop 5 is provided by the guide 6 which stops and prevents the untimely dismantling of the watch. The use of a box 2 provided with pins 27 solidarisant a central box body, and one or more side parts, makes it easy to exchange a bracelet, for a change of aesthetics, or for the washing of this bracelet, in particular when it comprises at least one textile part. These axes 27 may in particular be springs, or split rings, easy to extract, and ensuring a good holding in the service position.

Advantageously, the box 2 comprises a bezel made of flexible material, providing protection against shocks, in particular with accessories sports: racket, net, club, ball, or the like. In a variant, the surface portion of the box 2 is entirely made of such a material, such as rubber or the like.

The wrist is particularly good, even under heavy acceleration.

Its bracelet fits a wide variety of carrier sizes, making it very versatile. It also allows professional use over a combination of bulky work without any particular adjustment. The important range of adjustment of the amplitude of the bracelet is thus advantageous on technical, pressurized, aviation, diving or similar combinations.

The invention is easy to handle with gloves, which may be necessary for security reasons.

Its manufacturing cost is very moderate. The invention lends itself well to a bracelet exchange, depending on the use or aesthetic considerations.

Claims (18)

1. Watch (1) comprising, fixed to a case (2), a wristlet (3) comprising, between a first end (31) and a second end (32) opposite to each other, at least one extending strand (4), said wristlet (3) comprising on said second end (32) a buckle (5) which includes at least one stop surface (50) arranged to cooperate, in a fastened position, either with a case (2) assembled to said wristlet (3) on said first end (31) thereof, or with a second complementary stop surface (30) comprised in said wristlet (3) in proximity to said first end (31), said buckle (5) arranged to encircle said case (2) at least on a first side (21) of said case (2), said buckle (5) being formed by said at least one extending strand (4), or by an added buckle (59), said stop surface (50) being arranged to cooperate, in at least one fastened position, with at least one first complementary stop surface (20) of said first side (21) of said case (2), said at least one extending strand (4), comprising a resilient strap with a substantially circular section, forming, at said second end (32) of said wristlet (3), two strands (41, 42) arranged to extend substantially in parallel and joined at the distal end of said wristlet (3) to form said buckle (5), said case (2) comprising at least one longitudinal guide member (28) for receiving said extending strand (4) and/or said buckle (5) in the form of parallel grooves for receiving two symmetrical portions of an extending strand (4), characterized in that said case (2) comprises, on the side of said first end (31) of said wristlet (3), a fixed and/or hinged insert (26), which includes a first complementary stop surface (20), and which is arranged to cooperate in a complementary manner with said stop surface (50) comprised in an added buckle (59).
2. Watch (1) according to claim 1, characterized in that said wristlet includes at least one other strand in addition to said at least one extending strand (4), and in that said at least one extending strand (4) is more extendable than any other said strand.
3. Watch (1) according to claim 1 or 2, characterized in that at least one said other strand is of invariable length under the action of a traction force imparted by the user.
4. Watch (1) according to any of claims 1 to 3, characterized in that said at least one extending strand (4) is sized to provide a traction force greater than 2N on said buckle (5) for any diameter of the user's wrist comprised between a minimum diameter (DMIN) and a maximum diameter (DMAX).
5. Watch (1) according to any of claims 1 to 4, characterized in that said at least one stop surface (50) is arranged to cooperate in a clip-fit, in said fastening position, with said at least one second complementary stop surface (30).
6. Watch (1) according to any of claims 1 to 5, characterized in that said buckle (5) comprises gripping means (52) arranged to facilitate the extraction of said buckle (5) when said wristlet (3) is extended for removal.
7. Watch (1) according to any of claims 1 to 6, characterized in that said buckle (5) comprises resilient actuating means (53) forming a clamp arranged to improve the fastening of said buckle (5) on the complementary stop surface and/or to facilitate the extraction of said buckle (5) when said wristlet (3) is extended for removal.
8. Watch (1) according to any of claims 1 to 7, characterized in that said wristlet (3) includes at least one hinged link carrying a said second complementary stop surface (30).
9. Watch (1) according to any of claims 1 to 8, characterized in that, on said first side (21), said case (2) comprises a surface (29) having a back taper forming at least one portion of said first complementary stop surface (20).
10. Watch (1) according to any of claims 1 to 9, characterized in that said case (2) comprises, on said first side (21), on said first complementary stop surface (20), at least one first housing (23) and/or a first lug (24) arranged to cooperate in a complementary manner with a second lug (53) and/or a second housing (54) comprised in said stop surface (50).
11. Watch (1) according to any of claims 1 to 10, characterized in that said at least one stop surface (50) is arranged to cooperate in a clip-fit, in said fastened position, with said at least one first complementary stop surface (20).
12. Watch (1) according to any of claims 1 to 11, characterized in that, on said second side (22) opposite to said first side (21), said case (2) comprises guide means (6), which are arranged to guide said second end (32) of said wristlet (3) or said at least one extending strand (4), so that said case (2) and said wristlet (3) together form, in any position of said buckle (5), a substantially toric closed volume.
13. Watch (1) according to claim 12, characterized in that said watch (1) includes, on said guide means (6), stop means (7) for said buckle (5).
14. Watch (1) according to claim 12 or 13, characterized in that at least one said extending strand (4) slides in said guide means (6), and in that said wristlet (3) includes a stop surface (33) arranged to form an end-of-travel stop for said guide means (6).
15. Watch (1) according to any of claims 12 to 14, characterized in that said case (2) carries said guide means (6) on a fixed and/or hinged link on said second side (22).
16. Watch (1) according to any of claims 1 to 15, characterized in that said buckle (5) includes resilient actuating means (53) forming a clamp, arranged to improve the fastening of said buckle (5) on said case (2) and/or to facilitate the extraction of said buckle (5) when said wristlet (3) is extended for removal.
17. Watch (1) according to any of claims 1 to 16, characterized in that said at least one extending strand (4) comprises a resilient strap of substantially circular section, forming, at said second end (32) of said wristlet (3), a U-shaped buckle (5), of which the lateral branches are arranged to extend substantially in parallel around said case (2) or on said case (2) and whose transverse branch delimits a recess (51) of said buckle (5), and is arranged to abuttingly engage with said case (2).
18. Watch (1) according to any of claims 1 to 17, characterized in that said buckle (5) is arranged to entirely encircle said case (2).

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