Anti-theft device for a wristwatch

Abstract

An anti-theft device (1) for a wristwatch, comprising a cable (3) intended to at least partially surround the wrist of a user, fastening means (2) for fastening the cable (3) to a wristwatch, a clasp (4) for closing the loop formed by the cable (3) around the wrist of the user, the fastening means (2) comprising a fastening plate (2) intended to be secured to a watch case. A kit comprising a wristwatch and such an anti-theft device (1) secured to the wristwatch by the fastening plate (2).

Description

[0001] Anti-theft device for wristwatches

[0002] The present invention relates to an anti-theft device for wristwatches. In particular, the present invention relates to an anti-theft device for wristwatches with flexible straps.

[0003] Theft of wristwatches, whether by snatch or trickery, is a crime that has intensified in several major cities. This type of theft primarily involves violent or underhanded methods to steal luxury watches or popular models.

[0004] Faced with this situation, various solutions have been devised to lock the clasps of certain watch bracelets, particularly locking systems that can only be opened with a key or a specific tool. These solutions are effective in preventing the theft of watches with solid bracelets, typically those with metal bands. However, their effectiveness is limited for watches with less mechanically resistant bracelets, such as leather, fabric, or synthetic straps. Indeed, thieves sometimes steal such watches with flexible bracelets by cutting the strap, for example, with a box cutter, while they are being worn by the owner. In such situations, locking the clasp is ineffective in preventing theft.Moreover, these solutions generally require replacing the original clasp of the watch with a locking clasp, which is not always possible and alters the aesthetic appearance of the watch, even when it is being worn.

[0005] US patent 8,621,886 B1 describes a jewelry security chain consisting of a flexible cable running along the bracelet. The flexible cable is attached to each link of the metal bracelet by an eyelet screw on one side of the link. The cable passes through each eyelet and is attached at both ends to an eyelet on the same link. The purpose of this security chain is to prevent the jewelry from being lost should the bracelet clasp fail. While this security chain prevents the bracelet from being lost accidentally, it does not provide effective protection against theft. Furthermore, it is not suitable for flexible bracelets and significantly detracts from the jewelry's appearance.

[0006] Patent application CH 670 350 G A3 describes a watch strap made of several wires that pass through the watch case and over the crystal to protect it from impacts and give the watch a distinctive aesthetic. The watch case is specifically designed to accommodate this strap, and the watch's appearance is significantly influenced by the strap's wires.

[0007] US patent 2,344,136 A describes a protective cover for a wristwatch, designed to prevent scratches and dirt. The cover forms a protective sleeve in which the watch is housed. It includes a snap closure to fasten the cover around the user's wrist and two endless elastic bands to hold the strands of the cover together while allowing the user to spread them apart enough to slip the cover onto their wrist. This cover does not protect the watch against attempts to tear off or cut the strap. Furthermore, it completely encloses the watch, thus impacting its visual appearance.

[0008] One aim of the present invention is to provide an anti-theft device offering effective protection against the theft of watches with flexible straps.

[0009] Another objective of the present invention is to provide an anti-theft device that can be adapted to any existing wristwatch. A further objective of the present invention is to provide an anti-theft device that does not affect the aesthetics of the wristwatch it protects.

[0010] An additional objective of the present invention is to provide an anti-theft device whose attachment does not require alteration of the wristwatch.

[0011] These objectives and other advantages are achieved by an anti-theft device for wristwatches, comprising a cord designed to at least partially encircle a user's wrist, fastening means for attaching the cord to a wristwatch, and a fastener for closing the loop formed by the cord around the user's wrist. The cord is chosen to resist manual removal or cutting with a box cutter, knife, or scissors, so as to remain attached around a user's wrist even if an attempt is made to steal the wristwatch to which it is attached. The fastening means include a mounting plate designed to be attached to a watch case.

[0012] The mounting plate is preferably intended to be fixed to the bottom of the watch case.

[0013] Preferably, the cable is attached to the mounting plate and configured to extend on either side of the mounting plate along a wristband of a wristwatch when the anti-theft device is attached to the wristwatch.

[0014] According to some embodiments, the cable is at least partially housed in a groove in the fixing plate.

[0015] Optionally, the cable is attached, for example glued or welded, to the mounting plate.

[0016] Preferably, the anti-theft device includes means of protecting a user's wrist to prevent the cord from coming into direct contact with the user's skin when the anti-theft device is attached to a wristwatch worn by the user.

[0017] Protective measures include, for example, a sheath surrounding the cable for at least part of its length.

[0018] The sheath, for example, is part of the attachment and includes means of closure to close the sheath around the user's wrist.

[0019] According to some modes of execution, the anti-theft device comprises a plurality of cables, preferably two cables.

[0020] The strands of the plurality of strands are preferably arranged essentially parallel to each other.

[0021] The attachment then includes, for example, two end pieces to attach the ropes together at their ends, each end piece attaching the ropes together on one of their two ends, each end piece including an opening for the passage of the other end of each rope thus allowing to form a closed loop with the ropes, the size of the loop being adjustable by spacing or bringing the end pieces closer together.

[0022] Preferably, the attachment also includes a lock to secure the size of the loop formed by the cables.

[0023] The aforementioned goals and other advantages are also achieved with a kit comprising a wristwatch and such an anti-theft device attached to the wristwatch by the mounting plate. Since the cable(s) cannot be easily pulled or cut and are attached to the wristwatch by the mounting plate, they secure the watch to the user's wrist via the strap, thus preventing theft even if the wristband is cut or pulled off. The anti-theft device is preferably configured and oriented on the wristwatch so that the cable(s) extend under the wristband, parallel to it. In this way, the anti-theft device is preferably concealed under the wristwatch when it is worn on the user's wrist.

[0024] The invention will be better understood upon reading the description below, illustrated by the figures where:

[0025] - Figure 1 is a schematic view of an anti-theft device according to one embodiment of the invention;

[0026] - Figure 2 is a top view of a wristwatch equipped with the anti-theft device of Figure 1;

[0027] - Figure 3 is a bottom view of the wristwatch in Figure 2;

[0028] - Figure 4 is a side view of the wristwatch in Figure 2 with the anti-theft device closed and the strap open;

[0029] - Figure 5 is a perspective view of an anti-theft device according to another embodiment of the invention;

[0030] - Figure 6 is an exploded view of the anti-theft device in Figure 5;

[0031] - Figure 7 is a side view of the anti-theft device in Figure 5;

[0032] - Figure 8 partially illustrates a fixing plate according to one embodiment of the invention.

[0033] With reference to Figure 1, the anti-theft device 1 according to the invention comprises fastening means 2 for attaching the anti-theft device 1 to a watch, preferably to the case of a watch, a cable 3 mechanically linked to the fastening means 2 and a fastener 4 for closing the cable 3 around the wrist of a watch user when the anti-theft device 1 is attached to the watch.

[0034] According to the illustrated embodiment, the fastening means comprise a mounting plate 2 configured to be fixed, for example by gluing, to the bottom of a watch case. The mounting plate 2 is preferably transparent, so that the part of the watch case to which the mounting plate 2 is fixed, for example the case back, is visible through the mounting plate 2 when the latter is fixed to the watch case. The mounting plate 2 is preferably rigid, for example made of polycarbonate or any other suitable rigid material. The size and shape of the mounting plate 2 are preferably adapted so that the mounting plate at least partially conforms to the part of the watch case to which it is intended to be fixed. The mounting plate 2, for example, essentially conforms to the bottom of the wristwatch case to which the anti-theft device 1 is intended to be fixed.According to the embodiment illustrated by way of example, the mounting plate 2 is round and is therefore advantageously suited for attachment to a wristwatch with a round case and / or a round case back. However, the mounting plate may be of a different shape within the scope of the invention, for example, square, rectangular, oval, etc., depending, for example, on the shape of the watch case and / or its case back. The material and / or color of the mounting plate may also be freely chosen, depending, for example, on the material and / or color of the wristwatch for which it is intended. Preferably, however, the material of the mounting plate is sufficiently robust to resist any attempt to remove the anti-theft device.

[0035] The cable 3 is, for example, a steel cable, preferably flexible enough to close around a user's wrist like a bracelet and preferably strong enough to provide adequate protection against tearing or shearing with a cutter, for example. According to the embodiment illustrated in Figure 1, the cable 3 is attached to the mounting plate 2 approximately at the midpoint of the mounting plate 2. The portion of the cable 3 attached to the mounting plate 2 is, for example, housed in a groove 20 in the mounting plate 2. The groove 20 is, for example, straight and extends from one edge of the mounting plate 2 to the opposite edge. The groove 20 passes, for example, approximately through the geometric center of the mounting plate 2.The groove 20 is preferably formed on the face of the mounting plate 2 that is oriented against the watch case when the anti-theft device 1 is attached to a watch, so that the cable 3 is held in the groove 20 between the mounting plate 2 and the watch case when the anti-theft device 1 is attached to a wristwatch. In some embodiments, the cable 3 is fixed, for example, by gluing or welding, to the mounting plate 2. The groove 20 is, for example, filled with a thermoformable material or adhesive after the cable 3 has been inserted into it. In other embodiments, the mounting plate is thermoformed, for example, by molding, around a central portion of the cable.

[0036] The cord 3 extends on either side of the attachment plate 2 to allow it to be fastened around a user's wrist using the clasp 4. According to the illustrated embodiment, the clasp 4 is a sheath surrounding the portions of the cord 3 extending beyond the attachment plate 2 so as to prevent any direct contact between the cord 3 and the skin of a user wearing a watch equipped with the anti-theft device 1. The sheath 4 is, for example, made of felt, fabric, leather, or any other suitable material, preferably soft and comfortable to wear. The sheath 4 is preferably configured to hold the cord 3 in position relative to the sheath 4. The sheath 4 is, for example, sewn through on each side of the cord 3, keeping the cord 3 aligned in the channel thus created, preferably in the center of the sheath 4.The cable 3 is for example attached to the sheath 4 at each of its ends by means of a sealing ring 31 preventing for example the sheath 4 from curling up along the cable 3. The sheath 4 comprises for example two strands extending on either side of the fixing plate 2. Each strand of the sheath 4 is for example attached by one end to the fixing plate 2, near one end of the groove 20. Each strand of the sheath 4 is for example attached, for example glued, welded or sewn, to an ear 21 of the fixing plate 2 provided for this purpose. According to the invention, the fastener 4 includes closure means 41 for attaching the ends of the cable 3 together. The closure means include, for example, self-gripping tape 41, for example Velcro tape, sewn onto the free end of each strand of the sheath 4 to attach them to each other.Other closure methods are conceivable within the scope of the invention, such as, for example, a bracelet clasp, a ribbon for tying a knot, a snap fastener, or any other suitable means. However, the closure methods are preferably relatively thin so as not to significantly impact the comfort of the user wearing a watch equipped with the anti-theft device of the invention.

[0037] The mounting plate 2 is, for example, bonded to the watch case using an adhesive layer 22 that at least partially covers the face of the mounting plate 2 that is oriented against the watch case when the anti-theft device 1 is attached to a watch. In some embodiments, the adhesive layer 22 covers the groove 20 and thus helps to hold the cord 3 in the groove 20 of the mounting plate 2 before the anti-theft device 1 is attached to a watch. The adhesive layer 22 is, for example, a double-sided adhesive cut to preferably cover most of the surface of the mounting plate 2 that is intended to be in contact with the watch case when the anti-theft device 1 is attached to a wristwatch. However, other means are conceivable within the scope of the invention for attaching the mounting plate to the watch case, such as, for example, glue, screws, hooks, or the like.Preferably, the mounting plate 2 is permanently or almost permanently attached to the watch 9, thus preventing the watch 9 from being, for example, torn from the anti-theft device 1. According to a particular embodiment given by way of illustration, but in no way limiting, the mounting plate 2 is a 1.5 mm thick transparent polycarbonate plate, cut to the shape of the case back of the watch for which the anti-theft device is intended. The groove 20 is a groove 1 mm deep and 1 mm wide extending from one lug 21 to the other. The cable 3 is a 1 mm diameter steel cable. The adhesive layer 22 is a 0.5 mm thick double-sided adhesive, cut essentially to the shape of the mounting plate 2. The fastener 4 is a 1 mm thick sheath formed by two layers of fabric sewn together.Those skilled in the art will understand that the dimensions and materials indicated above are given for illustrative purposes only, but in no way as a limitation. Indeed, the dimensions and materials used may be chosen differently within the scope of the invention, for example for practical and / or aesthetic reasons.

[0038] Figure 2 shows a bottom view of a wristwatch 9 equipped with the anti-theft device 1 of Figure 1. When the anti-theft device 1 is attached to the wristwatch 9, the fixing plate 2 is, for example, glued against the bottom 92 of the case 91 of the wristwatch 9, and preferably oriented on the wristwatch 9 so that the wire 3 extends along the strap 90 of the wristwatch 9. The lugs 21 then preferably each extend under one of the lugs of the case.

[0039] As illustrated in Figure 3, which is a top view of the wristwatch in Figure 2, the anti-theft device 1 is preferably entirely concealed beneath the wristwatch 9 when attached to it, except for the ends of the cable 3 and / or the fastener 4, which, in certain embodiments, protrude on either side of the strap strands 90. The anti-theft device 1 thus has virtually no aesthetic impact on the wristwatch 9 when it is worn on the wrist. The anti-theft device 1 is preferably attached to the wristwatch 9 as follows. An anti-theft device 1 with fastening means 2 adapted to the wristwatch 9 is selected; for example, an anti-theft device 1 whose shape is adapted to the case back 92 of the wristwatch 9.If necessary, the wristwatch 9 is prepared for the attachment of the anti-theft device 1; for example, the surface of the case back 92 is degreased and cleaned. The attachment means 2 are fixed to the wristwatch 9; for example, the fixing plate 2 is glued to the case back 92 of the wristwatch 9 using the double-sided adhesive 22. During attachment, the anti-theft device 1 is preferably oriented on the wristwatch 9 so that the wire 3 is aligned parallel to, and preferably centered over, the strap 90 of the wristwatch 9.

[0040] Figure 4 schematically illustrates the wristwatch of Figures 2 and 3 in an intermediate position when the wristwatch 9 is placed on a user's wrist. When the wristwatch 9, equipped with the anti-theft device 1 of Figure 1, is placed on the wrist by a user, the user first fastens the clasp 4 of the anti-theft device 1 around their wrist before closing the wristband 90 of the wristwatch 9. The cord, for example housed in the sheath 4, then forms a loop that can accommodate a user's wrist. The loop is closed using the clasp 4, preferably by fastening the closure means 41, for example, using the hook-and-loop strip. Once the anti-theft device 1 is closed, the user can fasten the wristband 90 in the usual way.

[0041] The anti-theft device 1 thus protects the wristwatch 9 to which it is attached against the strap 90 being torn off or cut, thanks to the mechanical resistance of the cable 3 against such events. Indeed, even if the strap 90 were torn off or cut, the cable 3 would remain attached around the user's wrist and prevent a thief from taking the wristwatch 9. The wristwatch 9 would therefore be kept on the user's wrist by the anti-theft device 1. According to the embodiment described above, the cable 3 is a steel cable. However, other materials are conceivable within the framework of the invention, the cable 3 preferably being strong enough to resist a box cutter, knife blade, and / or scissors, and sufficiently thin and flexible so as not to cause discomfort to the wearer of the wristwatch 9 and to wrap easily around their wrist.The cable 3 is for example metallic and / or made of a synthetic material such as nylon, Kevlar, and / or any other suitable material.

[0042] According to the embodiment illustrated in Figure 1, the attachment 4 is a sheath surrounding the cable 3 on both sides, at least on the portions extending beyond the attachment plate 2. Other embodiments are possible within the scope of the invention for attaching the ends of the cable 3 together around the user's wrist. In some embodiments, the attachment comprises, for example, a hook and a loop, each attached directly to one end of the cable.

[0043] Another embodiment of the anti-theft device 1 of the invention is illustrated by way of example in Figure 5. According to this embodiment, the anti-theft device 1 comprises two cables 3, for example, two metallic cables and / or cables made of synthetic material and / or any other suitable material. The cables 3 are, for example, steel cables. The cables 3 are preferably sufficiently strong to resist an attempt to pull or shear them, and sufficiently flexible to conform at least partially to the wrist of a user.

[0044] The anti-theft device 1 comprises a mounting plate 2 intended to be fixed, for example by gluing with an adhesive layer 22 or by any other suitable means, to the bottom of a wristwatch case (not shown). As in the preceding embodiment, and according to the invention, the mounting plate 2 allows the cable(s) 3 to be secured to the wristwatch equipped with the anti-theft device 1 of the invention. The mounting plate 2 preferably includes at least one groove 20 for housing at least part of the two cables 3. Preferably, the mounting plate 2 is made of a rigid and transparent material, for example, plexiglass. The groove 20 is then preferably formed at the periphery of the mounting plate 2 in order to minimize the impact of the cables 3 on the visibility of the watch case back through the mounting plate 2.The groove 20 follows, for example, the entire periphery of the fixing plate 2 and the two cables 3 are each housed in one half of the groove 20.

[0045] Other transparent or opaque materials are possible within the scope of the invention for the mounting plate, the choice of material for the mounting plate depending, for example, on the material and / or nature of the case back of the wristwatch to which the anti-theft device is intended. The material is, however, preferably sufficiently rigid to form a mounting plate capable of resisting an attempt to remove the wristwatch to which the anti-theft device is attached.

[0046] According to the embodiment illustrated in Figure 5, the fastener 4 comprises two end fittings 40 and a locking mechanism 41. The cables 3 are, for example, attached together at each of their ends to an end fitting 40, for example, welded to the end fitting 40 and / or secured in the end fitting 40 with screws. Each end fitting 40 preferably includes openings allowing the other end of the cables 3 to pass through the corresponding end fitting 40. The cables 3 thus form a closed loop, held together by the end fittings 40. Moving the end fittings 40 closer together or further apart by sliding them along the cables 3 respectively increases or decreases the diameter of the loop. The 40 tips can thus be brought as close together as possible to allow a user to insert their hand into the loop in order to place the anti-theft device 1, and consequently the wristwatch to which it is attached, on their wrist.The spacing between the ends 40 allows, for example, the size of the loop to be adjusted to the user's wrist size after the user has put on the anti-theft device 1. The lock 41 allows the relative position of the ends 40 to be locked, for example, after the anti-theft device 1 has been adjusted to the wrist. The lock 41 includes, for example, an unlocked position in which both ends of each cord 3 can slide through the lock 41, and a locked position in which the sliding of the cords 3 within the lock 41 is blocked, thus preventing the loop formed by the cords 3 from enlarging. The lock 41 includes, for example, jaws that grip the cords 3 when the lock 41 is in the locked position and that move away from the cords 3 when the lock 41 is in the unlocked position. The lock 41 thus allows the size of the loop formed by the cords 3 of the anti-theft device 1 to be locked.

[0047] The lock 41 is, for example, held in the locked position by elastic means not shown, for example by a spring housed in the lock body 41, and brought to the unlocked position by the activation of an unlocking mechanism, for example by pressing a button formed on the lock body 41. According to other embodiments, the lock comprises two stable positions and the transition from the locked position to the unlocked position, and vice versa, is made by means of an unlocking mechanism accessible to the user, for example by rotating a part of the lock body between two distinct positions.According to some embodiments, the lock in the locked position allows the cables to slide through the lock only in the direction of a decrease in the loop, for example to adjust the anti-theft device to the size of the user's wrist, the enlargement of the loop, for example to remove the anti-theft device from the user's wrist, then requiring the lock to be brought to the unlocked position by activating the unlocking mechanism.

[0048] With reference to Figure 6, which is an exploded view of the anti-theft device 1 of Figure 5, the anti-theft device 1 preferably comprises spacers 33 for keeping the cables 3 parallel to each other outside the mounting plate 2. The spacers 33 each comprise, for example, two openings 34 spaced a predetermined distance apart, each opening 34 receiving one of the two cables 3. Preferably, the openings 34 are dimensioned to allow the cables 3 to slide within them, preferably with sufficient resistance to keep the spacers 33 essentially in place by friction after their position has been adjusted on the cables 3. Alternatively, or in combination, the spacers 33 are locked onto the cables 3 after their position has been adjusted, for example, by screws screwed into the body of the spacers 33 and each pressing against one of the cables 3, and / or by any other suitable means.

[0049] According to the illustrated embodiment, the cables 3 are, for example, pre-formed to follow the curve of the groove 20, which is, for example, circular. The mounting plate 2 preferably includes lugs 21 positioned 180° apart at the periphery of the mounting plate to guide the entry of the cables 3 into the respective groove 20. The cables 3 are inserted into the lugs 21 and then guided through the groove 20. The lugs 21 thus prevent the cables 3 from spreading apart at the entry of the mounting plate 2 relative to the distance maintained by the spacers 33, for example. Alternatively or additionally, the lugs 21 allow for the attachment of an optional sheath (not shown) to at least partially cover the cables 3, for example, to prevent them from contacting the user's skin.

[0050] With reference to Figure 7, the anti-theft device 1 is preferably as thin as possible to minimize its impact on the overall thickness of the kit formed by the anti-theft device 1 and the wristwatch (not shown) to which it is attached. The anti-theft device 1 is preferably attached to the wristwatch only by the mounting plate 2, for example, using an adhesive layer 22. The cables 33 are preferably positioned under the wristwatch strap when the watch is worn with the anti-theft device 1. The width of the anti-theft device 1, in particular the distance between the two cables 3, is preferably less than the width of the wristwatch to which it is attached so that the watch strap completely covers the anti-theft device 1 when the kit is worn on the user's wrist.The anti-theft device 1 is therefore preferably practically invisible when the wristwatch is worn with the anti-theft device 1, so that the aesthetics of the wristwatch are not significantly impacted, or not impacted at all, by the presence of the anti-theft device 1 under the wristwatch.

[0051] Figure 8 illustrates a central portion of a mounting plate 2 according to an embodiment of the anti-theft device of the invention. In this example, the mounting plate 2 comprises a central portion 24, preferably made of plexiglass or any other suitable transparent material, the shape of which is preferably adapted to the shape of the wristwatch for which the anti-theft device 1 is intended, in particular to the shape of the wristwatch case back. The central portion 24 shown, for example, is round for its attachment to the case back of a round wristwatch. Other shapes are, however, conceivable within the scope of the invention, for example, oval, square, rectangular, or any other suitable shape. The groove 20 is preferably formed at the periphery of the central portion, so that the wires inserted into the groove 20 do not affect the transparency of the center of the central portion 24.Each cable, for example, runs along the groove 20 for approximately half the circumference of the central portion 24. The central portion 24 preferably also includes openings around its periphery to allow the cables 3 to pass from the groove 20 outside the mounting plate 2, preferably in opposite positions relative to the center of the mounting plate 2. The periphery of the mounting plate 2 is preferably covered by a ring not shown in the figures, for example, opaque, metallic, made of titanium, or any other suitable material. The ring preferably covers at least part of one face of the central portion 24 so as to cover the groove 20 in order to retain the cables within it. The ring is preferably opaque so as to at least partially conceal the cables from view by an observer of the anti-theft device.Preferably, the ring partially covers both faces of the central part 24 near its periphery, preferably over a width sufficient to cover the groove 20. The adhesive layer, for example, for attaching the anti-theft device to the wristwatch is, for example, directly applied to the central part 24 of the fixing plate, and / or to the ring.

[0052] During the assembly of the anti-theft device 1 according to this embodiment, the cables 3 are, for example, placed in the groove 20, and then the ring is formed on the central part 24 of the mounting plate 2 to close the groove 20. The mounting plate 2 is then attached, for example by gluing, to the wristwatch for which it is intended. Preferably, the central plate 24 is attached to the watch case by the face on which the groove 20 is formed so as to ensure greater resistance of the anti-theft device to being pulled off.

[0053] In some embodiments, the cable(s) are covered with a flexible material protecting the user's skin from direct contact. In the embodiment illustrated in Figure 1, this protection is provided by the attachment 4 in the form of a sheath carrying the fastening means 41. In other embodiments, such as that illustrated in Figure 5, the unillustrated means of protecting the user's skin are optional and independent of the attachment. They may, for example, consist of an additional sheath arranged around the cables 3. These protective means are preferably made of fabric, leather, synthetic material, etc.

[0054] The illustrated embodiments show anti-theft devices 1 comprising one or two cords 3. However, it is conceivable within the scope of the invention to provide more than two cords 3 to ensure that the anti-theft device is held around the user's wrist, for example three, four cords, or more.

Claims

Demands 1. Anti-theft device (1) for wristwatch (9), comprising a cord (3) intended to at least partially encircle the wrist of a user, fastening means (2) for attaching the cord (3) to a wristwatch (9), a fastener (4) for closing the loop formed by the cord (3) around the user's wrist, characterized in that the fastening means (2) comprise a fastening plate (2) intended to be attached to a watch case (91).

2. Anti-theft device (1) according to the preceding claim, the fixing plate (2) being intended to be fixed to the bottom (92) of the watch case (91).

3. Anti-theft device (1) according to any one of the preceding claims, the cable (3) being attached to the fixing plate and configured to extend on either side of the fixing plate (2) along a strap (90) of a wristwatch (9) when the anti-theft device (1) is attached to the wristwatch (9).

4. Anti-theft device (1) according to any one of the preceding claims, the cable (3) being at least partially housed in a groove (20) of the fixing plate (2).

5. Anti-theft device (1) according to any one of the preceding claims, the cable (3) being fixed to the fixing plate (2).

6. Anti-theft device (1) according to any one of the preceding claims comprising means for protecting (4) the wrist of a user to prevent the cord (3) from coming into direct contact with the user's skin when the anti-theft device (1) is attached to a wristwatch (9) worn by the user.

7. Anti-theft device (1) according to the preceding claim, the protective means comprising a sheath (4) surrounding the cable (3) over at least part of its length.

8. Anti-theft device (1) according to the preceding claim, the sheath (4) forming part of the attachment and comprising closure means (41) for closing the sheath (4) around the user's wrist.

9. Anti-theft device (1) according to any one of the preceding claims, comprising a plurality of cables (3), preferably two cables (3).

10. Anti-theft device (1) according to the preceding claim, the cables (3) of the plurality of cables (3) being arranged essentially parallel to each other.

11. Anti-theft device (1) according to any one of claims 9 and 10, the attachment (4) comprising two ends (40) for attaching the cables (3) together at their ends, each end (40) attaching the cables (3) together on one of their two ends, each end (40) comprising an opening for the passage of the other end of each cable (3) thus allowing to form a closed loop with the cables (3), the size of the loop being adjustable by spacing or bringing together the ends (40).

12. Anti-theft device (1) according to the preceding claim, the attachment (4) further comprising a lock (41) for locking the size of the loop formed by the cables (3).

13. Kit comprising a wristwatch (9) and an anti-theft device (1) according to one of the preceding claims fixed to the wristwatch (9) by the fixing plate (2).

14. Kit according to the preceding claim, the anti-theft device (1) being configured and oriented on the wristwatch (9) so that the wire(s) (3) extend under the wristband (90) of the wristwatch (9), parallel to the wristband (90).

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