EP2633776B1 - Clasp with extensible loop - Google Patents

Clasp with extensible loop Download PDF

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Publication number
EP2633776B1
EP2633776B1 EP12157481.8A EP12157481A EP2633776B1 EP 2633776 B1 EP2633776 B1 EP 2633776B1 EP 12157481 A EP12157481 A EP 12157481A EP 2633776 B1 EP2633776 B1 EP 2633776B1
Authority
EP
European Patent Office
Prior art keywords
clasp
blade
locking
shank
pin
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP12157481.8A
Other languages
German (de)
French (fr)
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EP2633776A1 (en
Inventor
Dirk Schmiedecke
Claudio Corbucci
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Glashuetter Uhrenbetrieb GmbH
Original Assignee
Glashuetter Uhrenbetrieb GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Glashuetter Uhrenbetrieb GmbH filed Critical Glashuetter Uhrenbetrieb GmbH
Priority to EP12157481.8A priority Critical patent/EP2633776B1/en
Priority to CN201310086182.4A priority patent/CN103284417B/en
Priority to JP2013038554A priority patent/JP5695104B2/en
Publication of EP2633776A1 publication Critical patent/EP2633776A1/en
Priority to HK14102268.5A priority patent/HK1189135A1/en
Application granted granted Critical
Publication of EP2633776B1 publication Critical patent/EP2633776B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
    • A44C5/00—Bracelets; Wrist-watch straps; Fastenings for bracelets or wrist-watch straps
    • A44C5/18—Fasteners for straps, chains or the like
    • A44C5/22—Fasteners for straps, chains or the like for closed straps
    • A44C5/24—Fasteners for straps, chains or the like for closed straps with folding devices
    • A44C5/246—Fasteners for straps, chains or the like for closed straps with folding devices having size adjusting means
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
    • A44C5/00—Bracelets; Wrist-watch straps; Fastenings for bracelets or wrist-watch straps
    • A44C5/18—Fasteners for straps, chains or the like
    • A44C5/22—Fasteners for straps, chains or the like for closed straps
    • A44C5/24—Fasteners for straps, chains or the like for closed straps with folding devices

Definitions

  • the present invention relates to a clasp type deployant clasp, and more particularly to a locking device of such a clasp.
  • the so-called "open” bracelets are often distinguished, that is to say the two strands of which can be separated from each other, so-called “closed” bracelets, that is to say the two strands are secured to a clasp type folding clasp comprising a plurality of blades, and which allow to put the bracelet in the deployed position and then sufficiently tighten the wrist in the closed position.
  • Open bracelets typically have two leather strands, one of which is provided with a buckle and a barb at its end, and a second has a series of holes into one of which penetrates the barb according to the length desired for the bracelet; closed wristbands with folding clasp, very often made of steel, typically have push buttons that can be actuated by moving them in the opposite direction, perpendicular to the blades, against spring bars. The adjustment of the length is done in this case by removing rows of links.
  • the mutual attachment system of the blades usually uses notches protruding above the blades, and which are shaped to receive a bar, or a tongue arranged on one of the blades and penetrating a hole arranged in another blade.
  • the disadvantage of this type of locking parts is that they wear out quickly, on the one hand, and on the other hand they may break easily because of their relative fragility due to their shape.
  • the solution proposed by the Swiss patent CH703305 discloses an alternative fastening system between a blade and a stretcher for a folding clasp, wherein an axis perpendicular to the stretcher is introduced into a transverse groove disposed on an upper face of a central blade, at the end of which is arranged small a retention spout to ensure mutual locking of the blade and the stretcher.
  • a first disadvantage of this solution is to quickly use the small spout, which is solicited during each locking and unlocking operation, so that it offers less securing security than the solutions with notches.
  • this solution requires a large deformation threshold of the blades during locking and unlocking operations since each time must pass the axis beyond the same beak before engaging or release respectively of its housing in the transverse groove, which makes the use relatively inconvenient.
  • An object of the present invention is to provide an alternative solution to known clasp clasps, simplified construction and locking is more reliable.
  • An advantage of the proposed solution is to minimize the wear of the locking parts by virtue of the fact that the latter must not be plastically deformed to fix the folding blades to one another.
  • Another advantage of the proposed solution is to durably guarantee a better locking security for the clasp, and in particular a better impact resistance through the application of the locking force which plates the blades on the other in the closed position of the clasp , and thus maintains the mutual engagement of the locking parts in a safe and robust manner.
  • the figure 1 shows an exploded view of the various parts constituting a clasp 100 according to a preferred embodiment, which comprises a first central blade 1 which is folded between a first and a second leg 21,22 of a stretcher in the closed position of the clasp 100, so that the overall height of the assembly is reduced to a minimum.
  • the first and second blades 1,2 are hinged at one of their ends by a hinge 3 formed for example by a tube 31 closed at its end by a plug 32, and the first central blade 1 comprises at its other end a fastener 14 to a fastener 6 of a first strand of the strap 101, visible on the figure 3 , while the stretcher is connected at its other end to a first bar 4 for fastening a loop 5 whose upper bridge 51 comprises a pin 54, here formed by a threaded tube 541 and a large-head screw 542, which is intended to be introduced into one of the holes 10 of a second strand of the bracelet 102, as is also illustrated in FIG. figure 3 described below.
  • the attachment piece 6 comprises a central claw 61, allowing the centering of the first strand 101.
  • the central blade 1 comprises a first transverse hole 12 for the passage of a pin forming a first locking element 7 of the male type and whose ends protrude on either side of the central blade 1, and a second hole 13 to allow the passage of the pin 54 and thus fold the loop 5 completely on the blades in the closed position of the clasp.
  • a first recess 11, preferably cylindrical, is arranged at the upper face 15 of the central blade 1, to allow the passage of the first fastening bar 4, and the second and third recesses, respectively referenced 211 in the first leg 21 of the stretcher and 221 in the second leg 22 of the stretcher.
  • the second and third recesses 211 and 221 form a housing for receiving the projecting ends of the pin; they are arranged at the lower face 24 of the stretcher, visible on the Figures 4A and 4B and constitute the second locking elements 8 of the female type of the clasp.
  • Such an arrangement of the locking pieces of the male 7 and female 8 type not only makes it possible to minimize also the space requirement. height of the clasp in the closed position, but also to partially hide the locking elements, which are not visible from the top of the clasp 100.
  • enlargement tubes 9 are provided at the ends of the first bar 4 fixing the loop 5. It can be seen that indeed the spacing between the first leg 52 and the second leg 53 of the loop 5 is greater than the spacing between the side faces 20 of the stretcher.
  • bosses to improve retention of the pin clasp closure position, as well as inclined contact surfaces to minimize the deformation of the central blade during its folding between the first and second legs 21,22 of the stretcher.
  • a first boss arranged on the first leg 21 of the stretcher is referenced 212, while a second boss arranged on the second leg 22 of the stretcher is referenced 222.
  • a first bearing surface is referenced 213 on the first leg of the stretcher 21 and a second inclined bearing surface is referenced 223 on the second leg of the stretcher 22.
  • a detailed view of a boss and an inclined surface is illustrated in FIG. Figure 4B and described in more detail below.
  • the figure 2 shows a top view of the clasp 100, where all the pieces of the figure 1 have now been assembled.
  • the clasp is illustrated in this figure in the locking position (PV) where the first central blade 1 is between the first and second leg 21,22 of the stretcher, and the loop 5, connected to the stretcher via the first bar 4 and fastening tubes 9, is folded over the first central blade 1, the stud 54 engaging in its second hole 13.
  • the arms can be distinguished from the pin, forming the first locking element type male 7 of the locking device according to the invention, extending parallel to the axis of the hinge 3, formed by the tube 31 and the plug 32 in the vicinity of the fixing bar 4, while the attachment part 6 secured to the attachment end 14 of the first central blade 1.
  • the radius of curvature of the first blade 1 and the 2nd blade 2 are the same in the closed position; however, as is visible on the figure 3 , the first radius of curvature C1 of the first central plate 1 is larger than the second radius of curvature C2 of the second plate 2, that is to say that the first plate 1 is less curved than the second at rest, as in the unlocked position (D) of the clasp 100 illustrated in this figure in which the male locking element 7 is distinguished, as well as the first and second strands 101 and 102 with their respective fastening elements to the blades, this is -to say the attachment part 6 to the first strand and the loop 5 for the 2nd strand, which a pin (not visible in this Figure) arranged on the underside of the deck 51 enters one of the holes 10 second strand 102 to adjust the length of the bracelet.
  • the attachment piece 6 one can distinguish the central claw 61 which can be introduced into a slot at
  • the locking element 7 of the male type can not only, as described above, take the form of a pin but could also consist of arms machined integrally with the first blade 1 central. According to a variant, it would also be possible to arrange a portion of the first male-type locking elements 7 and a part of the female-type elements 8 on one of the blades, and another part of these first and second locking elements. 7.8 on the other blade.
  • the advantage of choosing preferably a pin, preferably forcibly fitted into the first hole 12 of the first central blade 1, is that one can choose a harder material for the pin than for the blade, which must be able to deform sufficiently to fix the blades without much effort on the part of the user.
  • the pin can be welded after its introduction in the first hole 12 of the central blade, to improve its resistance and permanently prevent lateral movement along the axis of the hole.
  • the locking device proposed according to the invention has a better durability than conventional clasps using fixed locking parts relative to the blades and using a clipping of male elements in female elements, because such a method of attachment requires a plastic deformation of the locking elements at each opening and at each closure of the clasp.
  • the plastic deformation must be important to guarantee the safety of the locking in the closed position, which renders on the one hand inconvenient use in view of the forces that must be exercised to engage and disengage mutually locking elements, and secondly necessarily generates a rapid wear of the parts used for locking.
  • the proposed solution also provides additional elastic elements to exert a restoring force, as for transverse pushers conventionally held protruding out of the cover of a clasp for metal bracelet at rest.
  • the Figure 4A shows a bottom view of the clasp 100 according to the preferred embodiment illustrated in the previous figures, in the locked position (PV).
  • the attachment piece 6 and the loop 5 are distinguished, and the male-type locking element 7, as well as the widening tubes 9 in the extension of the axis of the first bar 4 (not visible on this figure).
  • the second locking elements 8 of the female type that is to say the recesses for housing the elements male-type lock 7, as well as the second hole 13 of the central blade.
  • the Figure 4B is an enlarged view of the Figure 4A at the level of the parts performing the locking. It distinguishes the locking force F applied by the central blade, integral with the locking elements of the male type 7, towards the bottom of the second female-type elements 8, that is to say the second and third recesses 211, and 221.
  • the locking force F is thus exerted in a direction corresponding to that towards which the central blade, which is compressed in the closed position of the clasp to have the same radius of curvature as the stretcher, is recalled to its position of rest with a smaller curvature.
  • This locking force F which corresponds according to this embodiment to a restoring force of the central blade towards its rest position, extends in a direction substantially at 45 degrees to the left relative to the vertical, it is that is to say towards the left bottom of the second recess 211, and thus makes it possible to keep the two compressed blades one on the other in the locked position in a stable manner.
  • the second locking elements 8 of the female type preferably define a housing of a depth greater than or equal to the size of said first locking elements 7 of the male type, that is to say here the diameter of the protruding arms of the pin, and the first and second legs 21,22 of the stretcher respectively comprise a first and a second boss 212,222.
  • first boss 212 is visible on the Figure 4B
  • the second boss 212 may preferably be identical to the first, although only one of these bosses suffices to fulfill the function of retaining the pin by one of its arms.
  • the first boss 212 is located in the lower portion of the first recess 211 to form a bulge ending the housing in which the pin arm is inserted for locking the clasp.
  • the lower part of this boss is formed by a first inclined bearing surface 213 - (Note: a second bearing surface 223 is similarly formed preferably on the 2nd leg 22 of stretcher, but not visible in this figure) which makes it easier to lock and unlock the clasp by sliding the pin more easily, that is to say by generating a lesser deformation of the central blade, up to the level of the boss .
  • the inclination of the bearing surfaces may preferably be chosen to be around 45 degrees, so that the deformation of the central blade is not too great when the pin slides on these surfaces, but nevertheless makes it possible to constitute a threshold of intermediate deformation before the engagement of the arms of the pin in their respective housing, above the bosses.
  • a vertical wall, as for the right part of the housing, would also be conceivable within the scope of the invention but would have the disadvantage of generating a higher initial force threshold for the mutual engagement of the locking elements;
  • boss would be disadvantageous in terms of locking security, because for example in case of shock force tending to move the end of the central blade down could more easily extract its housing.
  • the bearing surface preferably extends over a length of at most 1 to 2 millimeters and preferably over a distance equal at most to the radius of the pin.
  • the arm of the pin extends to the outer side wall 20 of the first leg 21 of the stretcher, which allows the user to easily see if the clasp is actually in the closed position by throwing a glance in the transverse direction of the clasp, that is to say parallel to the axis of the hinge 3, while the locking device is not visible from the top because masked by the loop 5 according to the preferred embodiment described.
  • the correspondence of the lengthening of the arms of the pin up flush with the level of the outer side walls makes it possible to increase the contact surface between the male-type elements and the female-type elements of the device. locking, and therefore improve the holding of the fastener.
  • the length of the arms of the pin is preferably chosen so that no protruding portion projects beyond the side walls to avoid hanging or scratching external elements (for example the skin or clothing of the wearer of the bracelet).
  • first attachment end 210 of said first leg of the stretcher 21 which determines the axis of the first bar 4 of the fastening loop 5 with the second fastening end 220 of said second leg of the stretcher 22, although not visible in this figure, and the axis of the pin are located in the vicinity of one another.
  • the first and second attachment ends 210, 220 are located at the end of the first and second legs 21,22 of the stretcher, and preferably distant from the pins of at most 5 millimeters.
  • first and second recesses on the lower face 24 of the stretcher and the cylindrical recess 11 on the upper face 15 of the central blade not only makes it possible to mask the locking system, but also to facilitate the unlocking of the system by a pressure on the attachment piece 6, which will result in bending the central blade downwards and generate an unlocking force in the opposite direction of the locking force F.
  • the bridge 51 of the loop 5 is a preferred bearing surface for locking the clasp when the blades are in contact with the wrist of the user.
  • a lever effect to facilitate the locking of the clasp will be increased by shifting on the one hand the bridge 51 relative to the axis of the fixing bar 4 and on the other hand by increasing the size of the attachment end 14 of the attachment piece 6, which also allows to create a fulcrum further away from the axis of the fixing bar and therefore to increase the moment of a force exerted at this point of support.
  • the pins and more generally of the locking element 7 of the male type is configured to extend in a direction perpendicular to the locking force F, in order to maximize the overall contact area with the elements. of female type.
  • the arrangement of pins makes it possible to avoid machining male-type elements which follow the curvature of the blade on which they are fixed.
  • the clasp 100 described in the context of the invention is particularly suitable for wristwatches, but it will be understood that it can be used for any type of bracelet, with or without a buckle for releasably attaching to one of the strands.

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Description

Domaine techniqueTechnical area

La présente invention concerne un fermoir du type à boucle déployante, et plus particulièrement un dispositif de verrouillage d'un tel fermoir.The present invention relates to a clasp type deployant clasp, and more particularly to a locking device of such a clasp.

Etat de la techniqueState of the art

En horlogerie distingue souvent les bracelets dits « ouverts », c'est-à-dire dont les deux brins peuvent être dissociés l'un de l'autre, des bracelets dits « fermés », c'est-à-dire dont les deux brins sont solidaires d'un fermoir du type à boucle déployante comprenant plusieurs lames, et qui permettent d'enfiler le bracelet en position déployée puis de serrer suffisamment le poignet en position fermée. Les bracelets ouverts comportent typiquement deux brins en cuirs, dont un premier est pourvu d'une boucle et d'un ardillon à son extrémité, et un deuxième comporte une série de trous dans un desquels pénètre l'ardillon en fonction de la longueur souhaitée pour le bracelet; les bracelets fermés à boucle déployante, très souvent en acier, comportent typiquement des boutons poussoirs qui peuvent être actionnés en les déplaçant dans le sens contraire, perpendiculairement aux lames, à l'encontre de barrettes-ressorts. Le réglage de la longueur s'effectue dans ce cas en supprimant des rangées de maillons.In watchmaking, the so-called "open" bracelets are often distinguished, that is to say the two strands of which can be separated from each other, so-called "closed" bracelets, that is to say the two strands are secured to a clasp type folding clasp comprising a plurality of blades, and which allow to put the bracelet in the deployed position and then sufficiently tighten the wrist in the closed position. Open bracelets typically have two leather strands, one of which is provided with a buckle and a barb at its end, and a second has a series of holes into one of which penetrates the barb according to the length desired for the bracelet; closed wristbands with folding clasp, very often made of steel, typically have push buttons that can be actuated by moving them in the opposite direction, perpendicular to the blades, against spring bars. The adjustment of the length is done in this case by removing rows of links.

Afin de pallier les inconvénients des bracelets fermés en termes de finesse du réglage de la longueur du bracelet, et de ceux des bracelets ouverts en termes de commodité d'usage et de durée de vie, on connaît dans l'art antérieur des solutions mixtes pour bracelets souples présentant à la fois des lames formant une boucle déployante, et une boucle munie d'un téton prévu pour pénétrer dans une des perforations de l'un des brins. Un tel système permet à la fois un réglage fin de la longueur du bracelet lorsque cela est nécessaire, par exemple lors des changements entre les différentes saisons où la taille du poignet varie sensiblement en fonction de la température, mais également de bénéficier d'un fermoir utilisant un système du type à boucle déployante pour pouvoir l'ouvrir et le refermer facilement et rapidement au quotidien.In order to overcome the disadvantages of closed bracelets in terms of the fineness of the adjustment of the length of the bracelet, and of those of the open bracelets in terms of convenience of use and service life, known in the prior art mixed solutions for flexible bracelets having both blades forming a folding clasp, and a loop provided with a pin provided to penetrate into one of the perforations of one of the strands. Such a system allows both a fine adjustment of the length of the bracelet when necessary, for example during changes between different seasons where the size of the wrist varies not only because of the temperature, but also because of a clasp that uses a clasp-type system to open and close it easily and quickly on a daily basis.

Pour ce dernier type de fermoir, le système de fixation mutuelle des lames utilise habituellement des crans faisant saillie au-dessus des lames, et qui sont conformés pour recevoir une barrette, ou encore une langue agencée sur l'une des lames et pénétrant dans un trou agencé dans une autre lame. L'inconvénient de ce type de pièces de verrouillage est qu'elles s'usent rapidement, d'une part, et d'autre part qu'elles risquent de se casser aisément en raison de leur relative fragilité due à leur forme.For the latter type of clasp, the mutual attachment system of the blades usually uses notches protruding above the blades, and which are shaped to receive a bar, or a tongue arranged on one of the blades and penetrating a hole arranged in another blade. The disadvantage of this type of locking parts is that they wear out quickly, on the one hand, and on the other hand they may break easily because of their relative fragility due to their shape.

La solution proposée par le brevet suisse CH703305 divulgue un système de fixation alternatif entre une lame et un brancard pour une boucle déployante, selon laquelle un axe perpendiculaire au brancard est introduit dans une gorge transversale disposée sur une face supérieure d'une lame centrale, à l'extrémité de laquelle est agencé petit un bec de retenue pour assurer le verrouillage mutuel de la lame et du brancard. Un premier inconvénient de cette solution est d'user rapidement le petit bec, qui est sollicité lors de chaque opération de verrouillage et de déverrouillage, de telle sorte qu'elle offre une sécurité de fixation moindre que les solutions à crans. Par ailleurs, cette solution nécessite un seuil de déformation important des lames lors des opérations de verrouillage et de déverrouillage puisqu'il faut à chaque fois passer l'axe au-delà de ce même bec avant de l'engager ou respectivement le dégager de son logement dans la gorge transversale, ce qui en rend l'usage relativement malcommode.The solution proposed by the Swiss patent CH703305 discloses an alternative fastening system between a blade and a stretcher for a folding clasp, wherein an axis perpendicular to the stretcher is introduced into a transverse groove disposed on an upper face of a central blade, at the end of which is arranged small a retention spout to ensure mutual locking of the blade and the stretcher. A first disadvantage of this solution is to quickly use the small spout, which is solicited during each locking and unlocking operation, so that it offers less securing security than the solutions with notches. Moreover, this solution requires a large deformation threshold of the blades during locking and unlocking operations since each time must pass the axis beyond the same beak before engaging or release respectively of its housing in the transverse groove, which makes the use relatively inconvenient.

Il existe donc un besoin pour des fermoirs du type à boucle déployante exempts de ces limitations de l'art antérieur.There is therefore a need for clasps of the folding clasp type free from these limitations of the prior art.

Bref résumé de l'inventionBrief summary of the invention

Un but de la présente invention est de fournir une solution alternative aux fermoirs à boucle déployante connus, de construction simplifiée et dont le verrouillage soit plus fiable.An object of the present invention is to provide an alternative solution to known clasp clasps, simplified construction and locking is more reliable.

Ces buts sont atteints notamment grâce à un fermoir à boucle déployante comportant les caractéristiques de la revendication 1 ci-après.These aims are achieved in particular by means of a folding clasp having the features of claim 1 below.

Un avantage de la solution proposée est de minimiser l'usure des pièces de verrouillage grâce au fait que ces dernières ne doivent pas être déformées plastiquement pour fixer les lames déployantes l'une à l'autre.An advantage of the proposed solution is to minimize the wear of the locking parts by virtue of the fact that the latter must not be plastically deformed to fix the folding blades to one another.

Un autre avantage de la solution proposée est de garantir durablement une meilleure sécurité de verrouillage pour le fermoir, et notamment une meilleure résistance aux chocs grâce l'application de la force de verrouillage qui plaque les lames sur l'autre en position de fermeture du fermoir, et maintient ainsi l'engagement mutuel des pièces de verrouillage de façon sûre et robuste.Another advantage of the proposed solution is to durably guarantee a better locking security for the clasp, and in particular a better impact resistance through the application of the locking force which plates the blades on the other in the closed position of the clasp , and thus maintains the mutual engagement of the locking parts in a safe and robust manner.

Brève description des figuresBrief description of the figures

Un mode de réalisation préférentiel de mise en oeuvre de l'invention est indiqué dans la description et illustré par les figures annexées dans lesquelles:

  • La figure 1 montre une vue éclatée des différentes pièces constitutives d'un fermoir pour bracelet souple selon une variante préférentielle de l'invention;
  • La figure 2 montre une vue de dessus du fermoir selon la variante préférentielle de la figure 1 en position assemblée et fermée;
  • La figure 3 illustre une vue en perspective du fermoir selon la variante préférentielle de l'invention illustrée à la figure 1, avec les lames en position déployée et les brins du bracelet attachés aux extrémités des lames;
  • La figure 4A illustre une vue en perspective de dessus du fermoir selon la variante préférentielle de l'invention illustrée par les figures 1 à 3 en position de verrouillage;
  • La figure 4B est un agrandissement de la figure 4A montrant plus précisément l'insertion des éléments de verrouillage de type mâle dans les éléments de verrouillage de type femelle du fermoir selon la variante préférentielle de l'invention.
A preferred embodiment of the invention is indicated in the description and illustrated by the appended figures in which:
  • The figure 1 shows an exploded view of the various components of a clasp for flexible bracelet according to a preferred embodiment of the invention;
  • The figure 2 shows a top view of the clasp according to the preferred embodiment of the figure 1 in assembled and closed position;
  • The figure 3 illustrates a perspective view of the clasp according to the preferred variant of the invention illustrated in FIG. figure 1 , with the blades in the deployed position and the strands of the bracelet attached to the ends of the blades;
  • The Figure 4A illustrates a perspective view from above of the clasp according to the preferred variant of the invention illustrated by the Figures 1 to 3 in the locking position;
  • The Figure 4B is an enlargement of the Figure 4A showing more precisely the insertion of the male-type locking elements into the female-type locking elements of the clasp according to the preferred variant of the invention.

Exemple(s) de modes de réalisation de l'inventionExample (s) of Embodiments of the Invention

Dans ce qui suit, on décrira en détail un mode de réalisation préférentiel de l'invention adapté pour des bracelets souples; on comprendra toutefois que le système de verrouillage des lames proposé dans le cadre de l'invention pourra être utilisé pour d'autres types de bracelets, comme des bracelets en métal.In what follows, a preferred embodiment of the invention adapted for soft bracelets will be described in detail; however, it will be understood that blade locking system proposed in the context of the invention may be used for other types of bracelets, such as metal bracelets.

La figure 1 montre une vue éclatée des différentes pièces constitutives d'un fermoir 100 selon un mode de réalisation préférentiel, qui comprend une première lame 1 centrale venant se rabattre entre une première et une deuxième jambe 21,22 d'un brancard en position de fermeture du fermoir 100, de telle sorte que l'encombrement en hauteur de l'ensemble soit réduit au minimum. La première et la deuxième lame 1,2 sont articulées au niveau d'une de leurs extrémités par une charnière 3 formée par exemple par un tube 31 fermé à son extrémité par un bouchon 32, et la première lame centrale 1 comprend à son autre extrémité un embout de fixation 14 à une pièce d'attache 6 d'un premier brin du bracelet 101, visible sur la figure 3, tandis que le brancard est relié à son autre extrémité à une première barrette 4 de fixation d'une boucle 5 dont le pont supérieur 51 comprenant un téton 54, formé ici par un tube taraudé 541 et une vis à large tête 542, lequel est destiné à être introduit dans un des trous 10 d'un deuxième brin du bracelet 102, comme cela est également illustré à la figure 3 décrite ci-après. La pièce d'attache 6 comprend une griffe centrale 61, permettant le centrage du premier brin 101.The figure 1 shows an exploded view of the various parts constituting a clasp 100 according to a preferred embodiment, which comprises a first central blade 1 which is folded between a first and a second leg 21,22 of a stretcher in the closed position of the clasp 100, so that the overall height of the assembly is reduced to a minimum. The first and second blades 1,2 are hinged at one of their ends by a hinge 3 formed for example by a tube 31 closed at its end by a plug 32, and the first central blade 1 comprises at its other end a fastener 14 to a fastener 6 of a first strand of the strap 101, visible on the figure 3 , while the stretcher is connected at its other end to a first bar 4 for fastening a loop 5 whose upper bridge 51 comprises a pin 54, here formed by a threaded tube 541 and a large-head screw 542, which is intended to be introduced into one of the holes 10 of a second strand of the bracelet 102, as is also illustrated in FIG. figure 3 described below. The attachment piece 6 comprises a central claw 61, allowing the centering of the first strand 101.

La lame centrale 1 comprend un premier trou transversal 12 pour le passage d'une goupille formant un premier élément de verrouillage 7 de type mâle et dont les extrémités font saillie de part et d'autre de la lame centrale 1, et un deuxième trou 13 pour permettre le passage du téton 54 et ainsi replier la boucle 5 complètement sur les lames en position de fermeture du fermoir. Un premier évidement 11, de préférence cylindrique, est agencé au niveau de la face supérieure 15 de la lame centrale 1, pour permettre le passage de la première barrette 4 de fixation, et des deuxième et troisième évidements, référencés respectivement 211 dans la première jambe 21 du brancard et 221 dans la deuxième jambe 22 du brancard. Les deuxièmes et troisièmes évidements 211 et 221 forment un logement pour recevoir les extrémités saillantes de la goupille; ils sont agencés au niveau de la face inférieure 24 du brancard, visible sur les figures 4A et 4B et constituent les deuxièmes éléments de verrouillage 8 de type femelle du fermoir. Un tel agencement des pièces de verrouillage de type mâle 7 et femelle 8 permet non seulement de minimiser également l'encombrement en hauteur du fermoir en position de fermeture, mais aussi de masquer partiellement les éléments de verrouillage, qui ne sont pas visibles depuis le dessus du fermoir 100.The central blade 1 comprises a first transverse hole 12 for the passage of a pin forming a first locking element 7 of the male type and whose ends protrude on either side of the central blade 1, and a second hole 13 to allow the passage of the pin 54 and thus fold the loop 5 completely on the blades in the closed position of the clasp. A first recess 11, preferably cylindrical, is arranged at the upper face 15 of the central blade 1, to allow the passage of the first fastening bar 4, and the second and third recesses, respectively referenced 211 in the first leg 21 of the stretcher and 221 in the second leg 22 of the stretcher. The second and third recesses 211 and 221 form a housing for receiving the projecting ends of the pin; they are arranged at the lower face 24 of the stretcher, visible on the Figures 4A and 4B and constitute the second locking elements 8 of the female type of the clasp. Such an arrangement of the locking pieces of the male 7 and female 8 type not only makes it possible to minimize also the space requirement. height of the clasp in the closed position, but also to partially hide the locking elements, which are not visible from the top of the clasp 100.

Afin d'augmenter la largeur de la boucle 5 qui doit permettre le passage d'un des brins dont la largeur peut être supérieure à l'espacement entre les faces latérales 20 du brancard, des tubes d'élargissement 9 sont prévus aux extrémités de la première barrette 4 de fixation de la boucle 5. On peut constater qu'en effet l'espacement entre la première branche 52 et la deuxième branche 53 de la boucle 5 est supérieure à l'espacement entre les faces latérales 20 du brancard.In order to increase the width of the loop 5 which must allow the passage of one of the strands whose width may be greater than the spacing between the lateral faces 20 of the stretcher, enlargement tubes 9 are provided at the ends of the first bar 4 fixing the loop 5. It can be seen that indeed the spacing between the first leg 52 and the second leg 53 of the loop 5 is greater than the spacing between the side faces 20 of the stretcher.

Au niveau des deuxièmes et troisièmes évidements 211 et 221 sont également agencés des bossages pour améliorer la retenue de la goupille en position de fermeture du fermoir, ainsi que des surfaces de contact inclinées pour minimiser la déformation de la lame centrale lors de son rabattement entre les première et deuxième jambes 21,22 du brancard. Un premier bossage agencé sur la première jambe 21 du brancard est référencé 212, tandis qu'un deuxième bossage agencé sur la deuxième jambe 22 du brancard est référencé 222. Similairement une première surface d'appui est référencée 213 sur la première jambe du brancard 21 et une deuxième surface d'appui inclinée est référencée 223 sur la deuxième jambe du brancard 22. Une vue détaillée d'un bossage et d'une surface inclinée est illustrée à la figure 4B, et décrite plus en détail ci-après.At the second and third recesses 211 and 221 are also arranged bosses to improve retention of the pin clasp closure position, as well as inclined contact surfaces to minimize the deformation of the central blade during its folding between the first and second legs 21,22 of the stretcher. A first boss arranged on the first leg 21 of the stretcher is referenced 212, while a second boss arranged on the second leg 22 of the stretcher is referenced 222. Similarly a first bearing surface is referenced 213 on the first leg of the stretcher 21 and a second inclined bearing surface is referenced 223 on the second leg of the stretcher 22. A detailed view of a boss and an inclined surface is illustrated in FIG. Figure 4B and described in more detail below.

La figure 2 montre une vue de dessus du fermoir 100, où toutes les pièces de la figure 1 ont désormais été assemblées. Le fermoir est illustré sur cette figure en position de verrouillage (PV) où la première lame 1 centrale se trouve entre les première et deuxième jambe 21,22 du brancard, et la boucle 5, reliée au brancard par l'intermédiaire de la première barrette 4 de fixation et des tubes d'élargissement 9, est repliée sur la première lame 1 centrale, le téton 54 venant s'engager dans son deuxième trou 13. On peut distinguer les bras de la goupille, formant le premier élément de verrouillage de type mâle 7 du dispositif de verrouillage selon l'invention, s'étendant parallèlement à l'axe de la charnière 3, formée par le tube 31 et le bouchon 32 au voisinage de la barrette de fixation 4, tandis que la pièce d'attache 6, solidaire de l'embout de fixation 14 de la première lame 1 centrale.The figure 2 shows a top view of the clasp 100, where all the pieces of the figure 1 have now been assembled. The clasp is illustrated in this figure in the locking position (PV) where the first central blade 1 is between the first and second leg 21,22 of the stretcher, and the loop 5, connected to the stretcher via the first bar 4 and fastening tubes 9, is folded over the first central blade 1, the stud 54 engaging in its second hole 13. The arms can be distinguished from the pin, forming the first locking element type male 7 of the locking device according to the invention, extending parallel to the axis of the hinge 3, formed by the tube 31 and the plug 32 in the vicinity of the fixing bar 4, while the attachment part 6 secured to the attachment end 14 of the first central blade 1.

Comme cela est visible sur la figure 1, et encore mieux sur la figure 4A ci-après, selon le mode de réalisation préférentiel de l'invention le rayon de courbure de la première lame 1 et de la 2e lame 2 sont identiques en position de fermeture; toutefois, comme cela est visible sur la figure 3, le premier rayon de courbure C1 de la première lame 1 centrale est plus grand que le deuxième rayon de courbure C2 de la deuxième lame 2, c'est-à-dire que la première lame 1 est moins courbée que la deuxième au repos, comme sur la position déverrouillée (D) du fermoir 100 illustrée sur cette figure où l'on distingue l'élément mâle de verrouillage 7, ainsi que les premiers et deuxièmes brins 101 et 102 avec leurs éléments de fixation respectifs aux lames, c'est-à-dire la pièce d'attache 6 pour le premier brin et la boucle 5 pour le 2e brin, dont un téton (non visible sur cette figure) agencé sur la face inférieure du pont 51 pénètre dans l'un des trous 10 du deuxième brin 102 pour régler la longueur du bracelet. Sur la pièce d'attache 6, on peut distinguer la griffe centrale 61 qui peut s'introduire dans une fente à l'extrémité du premier brin 101 et garantir son centrage autour de la barrette de fixation (non visible sur cette figure).As is visible on the figure 1 , and even better on the Figure 4A below, in the preferred embodiment of the invention the radius of curvature of the first blade 1 and the 2nd blade 2 are the same in the closed position; however, as is visible on the figure 3 , the first radius of curvature C1 of the first central plate 1 is larger than the second radius of curvature C2 of the second plate 2, that is to say that the first plate 1 is less curved than the second at rest, as in the unlocked position (D) of the clasp 100 illustrated in this figure in which the male locking element 7 is distinguished, as well as the first and second strands 101 and 102 with their respective fastening elements to the blades, this is -to say the attachment part 6 to the first strand and the loop 5 for the 2nd strand, which a pin (not visible in this Figure) arranged on the underside of the deck 51 enters one of the holes 10 second strand 102 to adjust the length of the bracelet. On the attachment piece 6, one can distinguish the central claw 61 which can be introduced into a slot at the end of the first strand 101 and ensure its centering around the fixing bar (not visible in this figure).

L'élément de verrouillage 7 de type mâle peut non seulement, comme décrit précédemment, prendre la forme d'une goupille mais pourrait également consister en des bras usinés de façon monobloc avec la première lame 1 centrale. Selon une variante, il serait également possible d'agencer une partie des premiers éléments de verrouillage 7 de type mâle et une partie des éléments de type femelle 8 sur l'une des lames, et une autre partie de ces premiers et deuxième éléments de verrouillage 7,8 sur l'autre lame. L'intérêt de choisir de préférence une goupille, de préférence emmanchée à force dans le premier trou 12 de la première lame 1 centrale, est que l'on peut choisir un matériau plus dur pour la goupille que pour la lame, qui doit pouvoir se déformer suffisamment pour pouvoir fixer les lames sans trop d'effort de la part de l'utilisateur. On peut également choisir un matériau plus dur pour la deuxième lame 2, dans laquelle sont usinés les deuxièmes éléments de verrouillage 8 de type femelle (les deuxième et troisièmes évidements 211 et 221) que pour la première lame 1, et de préférence plus dur que la goupille, de telle sorte que cette dernière puisse être utilisée comme une pièce d'usure, c'est-à-dire remplaçable au bout d'un certain temps, car son coût de remplacement est moins élevé que celui d'un brancard dans son intégralité. Selon une variante, la goupille peut être soudée après son introduction dans le premier trou 12 de la lame centrale, afin d'améliorer sa tenue et empêcher durablement tout déplacement latéral selon l'axe du trou.The locking element 7 of the male type can not only, as described above, take the form of a pin but could also consist of arms machined integrally with the first blade 1 central. According to a variant, it would also be possible to arrange a portion of the first male-type locking elements 7 and a part of the female-type elements 8 on one of the blades, and another part of these first and second locking elements. 7.8 on the other blade. The advantage of choosing preferably a pin, preferably forcibly fitted into the first hole 12 of the first central blade 1, is that one can choose a harder material for the pin than for the blade, which must be able to deform sufficiently to fix the blades without much effort on the part of the user. It is also possible to choose a harder material for the second blade 2, in which the second locking elements 8 of the female type (the second and third recesses 211 and 221) are machined than for the first blade 1, and preferably harder than the pin, so that the latter can be used as a wear part, that is to say, replaceable after a while, because its replacement cost is lower than that of a stretcher in its entirety. According to one variant, the pin can be welded after its introduction in the first hole 12 of the central blade, to improve its resistance and permanently prevent lateral movement along the axis of the hole.

Quels que soient les matériaux choisis pour réaliser les premiers et deuxièmes éléments de verrouillage 7,8, le dispositif de verrouillage proposé selon l'invention présente une meilleure durabilité que ceux des fermoirs classiques utilisant des pièces de verrouillage fixes par rapport aux lames et qui utilisent un clipsage d'éléments mâles dans des éléments femelles, car un tel mode de fixation nécessite une déformation plastique des éléments de verrouillage à chaque ouverture et à chaque fermeture du fermoir. De plus la déformation plastique doit être importante pour garantir la sécurité du verrouillage en position fermée, ce qui en rend d'une part l'usage peu commode au vu des forces qu'il faut exercer pour engager et désengager mutuellement les éléments de verrouillage, et d'autre part génère nécessairement une usure rapide des pièces utilisées pour le verrouillage.Whatever the materials chosen to produce the first and second locking elements 7, 8, the locking device proposed according to the invention has a better durability than conventional clasps using fixed locking parts relative to the blades and using a clipping of male elements in female elements, because such a method of attachment requires a plastic deformation of the locking elements at each opening and at each closure of the clasp. In addition, the plastic deformation must be important to guarantee the safety of the locking in the closed position, which renders on the one hand inconvenient use in view of the forces that must be exercised to engage and disengage mutually locking elements, and secondly necessarily generates a rapid wear of the parts used for locking.

Selon l'invention, il n'est au contraire pas nécessaire de déformer plastiquement des éléments de verrouillage, car seule l'une des lames a besoin d'être déformée pour engager et désengager mutuellement les éléments de verrouillage. Hormis les avantages qu'elle procure en termes de facilité d'assemblage, la solution proposée dispense par ailleurs d'éléments élastiques additionnels pour exercer une force de rappel, comme pour des poussoirs transversaux classiquement maintenus en saillie hors du capot d'un fermoir pour bracelet métallique au repos.According to the invention, on the contrary, it is not necessary to deform plastically locking elements, because only one of the blades needs to be deformed to engage and disengage mutually locking elements. Apart from the advantages that it provides in terms of ease of assembly, the proposed solution also provides additional elastic elements to exert a restoring force, as for transverse pushers conventionally held protruding out of the cover of a clasp for metal bracelet at rest.

La figure 4A montre une vue de dessous du fermoir 100 selon le mode de réalisation préférentiel illustré sur les figures précédentes, en position verrouillée (PV). Sur la gauche de la figure 4A, on distingue la pièce d'attache 6 ainsi que la boucle 5, et l'élément de verrouillage de type mâle 7, ainsi que les tubes d'élargissement 9 dans le prolongement de l'axe de la première barrette 4 (non visible sur cette figure). Au milieu on peut voir la face inférieure des lames, et notamment la face inférieure de la deuxième lame 24 au niveau de laquelle sont agencés les deuxièmes éléments de verrouillage 8 de type femelle, c'est-à-dire les évidements pour loger les éléments de verrouillage de type mâle 7, ainsi que le deuxième trou 13 de la lame centrale. Sur la droite de la figure, on peut voir la charnière pour la fixation et l'articulation de la première lame 1 avec la deuxième lame, c'est-à-dire ici la lame centrale et le brancard.The Figure 4A shows a bottom view of the clasp 100 according to the preferred embodiment illustrated in the previous figures, in the locked position (PV). On the left of the Figure 4A the attachment piece 6 and the loop 5 are distinguished, and the male-type locking element 7, as well as the widening tubes 9 in the extension of the axis of the first bar 4 (not visible on this figure). In the middle one can see the underside of the blades, and in particular the lower face of the second blade 24 at which are arranged the second locking elements 8 of the female type, that is to say the recesses for housing the elements male-type lock 7, as well as the second hole 13 of the central blade. On the right of the figure, we can see the hinge for fixing and articulation of the first blade 1 with the second blade, that is to say here the central blade and the stretcher.

La figure 4B est une vue agrandie de la figure 4A au niveau des pièces effectuant le verrouillage. On y distingue la force de verrouillage F appliquée par la lame centrale, solidaire des éléments de verrouillage de type mâle 7, vers le fond des deuxièmes éléments de type femelle 8, c'est-à-dire les deuxièmes et troisièmes évidements 211, et 221. Sur cette figure on expliquera seulement la coopération entre l'un des bras de la goupille avec le deuxième évidement 211 sur la première jambe 21 du brancard qui est le seul des deux éléments femelle 8 visible sur cette figure. La force de verrouillage F est ainsi exercée dans une direction qui correspond à celle vers laquelle la lame centrale, qui est comprimée dans la position de fermeture du fermoir pour avoir le même rayon de courbure que celle de brancard, est rappelée pour retrouver sa position de repos avec une courbure moins importante. Cette force de verrouillage F, qui correspond selon ce mode de réalisation à une force de rappel de la lame centrale vers sa position de repos, s'étend dans une direction sensiblement à 45 degrés vers la gauche par rapport à la verticale, c'est-à-dire vers le fond gauche du deuxième évidement 211, et permet ainsi de maintenir les deux lames comprimées l'une sur l'autre en position verrouillée de manière stable.The Figure 4B is an enlarged view of the Figure 4A at the level of the parts performing the locking. It distinguishes the locking force F applied by the central blade, integral with the locking elements of the male type 7, towards the bottom of the second female-type elements 8, that is to say the second and third recesses 211, and 221. In this figure it will be explained only the cooperation between one of the arms of the pin with the second recess 211 on the first leg 21 of the stretcher which is the only of the two female elements 8 visible in this figure. The locking force F is thus exerted in a direction corresponding to that towards which the central blade, which is compressed in the closed position of the clasp to have the same radius of curvature as the stretcher, is recalled to its position of rest with a smaller curvature. This locking force F, which corresponds according to this embodiment to a restoring force of the central blade towards its rest position, extends in a direction substantially at 45 degrees to the left relative to the vertical, it is that is to say towards the left bottom of the second recess 211, and thus makes it possible to keep the two compressed blades one on the other in the locked position in a stable manner.

Afin d'améliorer la tenue de la fixation, les deuxièmes éléments de verrouillage 8 de type femelle définissent de préférence un logement d'une profondeur supérieure ou égale à la taille desdits premiers éléments verrouillage 7 de type mâle, c'est-à-dire ici le diamètre des bras saillants de la goupille, et les premières et deuxième jambes 21,22 du brancard comprennent respectivement un premier et un deuxième bossage 212,222. Bien que seul le premier bossage 212 soit visible sur la figure 4B, on comprendra que le deuxième bossage 212 pourra être de préférence identique au premier, bien qu'un seul de ces bossages suffise à remplir la fonction de retenue de la goupille par un de ses bras. Le premier bossage 212 est situé dans la partie inférieure du premier évidement 211 pour former un renflement terminant le logement dans lequel le bras de la goupille est inséré pour le verrouillage du fermoir. La partie basse de ce bossage est formée par une première surface d'appui inclinée 213 - (NB: une deuxième surface d'appui 223 est similairement formée de préférence sur la 2e jambe 22 du brancard, mais non visible sur cette figure) qui permet de verrouiller et déverrouiller plus facilement le fermoir en faisant glisser la goupille plus facilement, c'est-à-dire en générant une déformation moindre de la lame centrale, jusqu'au niveau du bossage. L'inclinaison des surfaces d'appui peut être choisie de préférence aux alentours de 45 degrés, de telle sorte que la déformation de la lame centrale ne soit pas trop importante lorsque la goupille glisse sur ces surfaces, mais permette néanmoins de constituer un seuil de déformation intermédiaire avant l'engagement des bras de la goupille dans leurs logements respectifs, au dessus des bossages. Une paroi verticale, comme pour la partie droite du logement, serait également envisageable dans le cadre de l'invention mais présenterait l'inconvénient de générer un seuil de force initial plus élevé pour l'engagement mutuel des éléments de verrouillage; par ailleurs l'absence de bossage serait désavantageux en termes de sécurité de verrouillage, car par exemple en cas de choc une force tendant à déplacer l'extrémité de la lame centrale vers le bas pourrait plus facilement l'extraire son logement. La surface d'appui s'étend de préférence sur ou une longueur d'au maximum 1 à 2 millimètres et de préférence sur une distance égale au maximum au rayon de la goupille.In order to improve the strength of the fastening, the second locking elements 8 of the female type preferably define a housing of a depth greater than or equal to the size of said first locking elements 7 of the male type, that is to say here the diameter of the protruding arms of the pin, and the first and second legs 21,22 of the stretcher respectively comprise a first and a second boss 212,222. Although only the first boss 212 is visible on the Figure 4B It will be understood that the second boss 212 may preferably be identical to the first, although only one of these bosses suffices to fulfill the function of retaining the pin by one of its arms. The first boss 212 is located in the lower portion of the first recess 211 to form a bulge ending the housing in which the pin arm is inserted for locking the clasp. The lower part of this boss is formed by a first inclined bearing surface 213 - (Note: a second bearing surface 223 is similarly formed preferably on the 2nd leg 22 of stretcher, but not visible in this figure) which makes it easier to lock and unlock the clasp by sliding the pin more easily, that is to say by generating a lesser deformation of the central blade, up to the level of the boss . The inclination of the bearing surfaces may preferably be chosen to be around 45 degrees, so that the deformation of the central blade is not too great when the pin slides on these surfaces, but nevertheless makes it possible to constitute a threshold of intermediate deformation before the engagement of the arms of the pin in their respective housing, above the bosses. A vertical wall, as for the right part of the housing, would also be conceivable within the scope of the invention but would have the disadvantage of generating a higher initial force threshold for the mutual engagement of the locking elements; Moreover, the absence of boss would be disadvantageous in terms of locking security, because for example in case of shock force tending to move the end of the central blade down could more easily extract its housing. The bearing surface preferably extends over a length of at most 1 to 2 millimeters and preferably over a distance equal at most to the radius of the pin.

Sur la figure 4B, on peut constater que le bras de la goupille s'étend jusqu'à la paroi latérale externes 20 de la première jambe 21 du brancard, ce qui permet à l'utilisateur de visualiser aisément si le fermoir est effectivement en position de fermeture en jetant un coup d'oeil dans la direction transversale du fermoir, c'est-à-dire parallèlement à l'axe de la charnière 3, alors que le dispositif de verrouillage n'est pas visible depuis le haut car masqué par la boucle 5 selon le mode de réalisation préférentiel décrit. Par ailleurs, la correspondance de l'allongement de la taille des bras de la goupille jusqu'à affleurer au niveau des parois latérales externes permet d'augmenter la surface de contact entre les éléments de type mâle et les éléments de type femelle du dispositif de verrouillage, et par conséquent d'améliorer la tenue de la fixation. On choisira de préférence toutefois la longueur des bras de la goupille de telle sorte qu'aucune partie saillante ne dépasse les parois latérales pour éviter d'accrocher ou griffer des éléments extérieurs (par exemple la peau ou des vêtements du porteur du bracelet).On the Figure 4B it can be seen that the arm of the pin extends to the outer side wall 20 of the first leg 21 of the stretcher, which allows the user to easily see if the clasp is actually in the closed position by throwing a glance in the transverse direction of the clasp, that is to say parallel to the axis of the hinge 3, while the locking device is not visible from the top because masked by the loop 5 according to the preferred embodiment described. Furthermore, the correspondence of the lengthening of the arms of the pin up flush with the level of the outer side walls makes it possible to increase the contact surface between the male-type elements and the female-type elements of the device. locking, and therefore improve the holding of the fastener. However, the length of the arms of the pin is preferably chosen so that no protruding portion projects beyond the side walls to avoid hanging or scratching external elements (for example the skin or clothing of the wearer of the bracelet).

On peut également constater sur la figure 4B que la première extrémité de fixation 210 de ladite première jambe du brancard 21, qui détermine l'axe de la première barrette 4 de fixation de la boucle 5 avec la deuxième extrémité de fixation 220 de ladite deuxième jambe du brancard 22, bien que non visible sur cette figure, et l'axe de la goupille sont situés au voisinage l'un de l'autre. Les premières et deuxièmes extrémités de fixation 210, 220 sont situées à l'extrémité des premières et deuxièmes jambes 21,22 du brancard, et de préférence distants des goupilles d'au maximum 5 millimètres. Afin de maximiser l'effet levier et le moment exercé par la force de verrouillage F en position de fermeture du fermoir, on pourra choisir un écartement entre l'axe de la goupille et l'axe de la barrette d'au maximum 2-3 millimètres, comme selon le mode de réalisation préférentiel illustré.We can also see on the Figure 4B that the first attachment end 210 of said first leg of the stretcher 21, which determines the axis of the first bar 4 of the fastening loop 5 with the second fastening end 220 of said second leg of the stretcher 22, although not visible in this figure, and the axis of the pin are located in the vicinity of one another. The first and second attachment ends 210, 220 are located at the end of the first and second legs 21,22 of the stretcher, and preferably distant from the pins of at most 5 millimeters. In order to maximize the leverage effect and the moment exerted by the locking force F in the closed position of the clasp, it is possible to choose a spacing between the axis of the pin and the axis of the bar of a maximum of 2-3 millimeters, as in the preferred embodiment illustrated.

Le fait d'agencer les premier et deuxième évidements sur la face inférieure 24 du brancard et l'évidement cylindrique 11 sur la face supérieure 15 de la lame centrale permet non seulement de masquer le système de verrouillage, mais aussi de faciliter le déverrouillage du système grâce à une pression sur la pièce d'attache 6, qui aura pour conséquence courber la lame centrale vers le bas et générer une force de déverrouillage dans le sens inverse de la force de verrouillage F. Inversement, on pourra noter que le pont 51 de la boucle 5 constitue une surface d'appui privilégiée pour effectuer le verrouillage du fermoir lorsque les lames sont en contact avec le poignet de l'utilisateur. Un effet levier pour faciliter le verrouillage du fermoir sera augmenté en décalant d'une part le pont 51 par rapport à l'axe de la barrette de fixation 4 et d'autre part en augmentant la taille de l'embout de fixation 14 de la pièce d'attache 6, qui permet également de créer un point d'appui plus éloigné de l'axe de la barrette de fixation et donc d'augmenter le moment d'une force exercée au niveau de ce point d'appui.The fact of arranging the first and second recesses on the lower face 24 of the stretcher and the cylindrical recess 11 on the upper face 15 of the central blade not only makes it possible to mask the locking system, but also to facilitate the unlocking of the system by a pressure on the attachment piece 6, which will result in bending the central blade downwards and generate an unlocking force in the opposite direction of the locking force F. Conversely, it may be noted that the bridge 51 of the loop 5 is a preferred bearing surface for locking the clasp when the blades are in contact with the wrist of the user. A lever effect to facilitate the locking of the clasp will be increased by shifting on the one hand the bridge 51 relative to the axis of the fixing bar 4 and on the other hand by increasing the size of the attachment end 14 of the attachment piece 6, which also allows to create a fulcrum further away from the axis of the fixing bar and therefore to increase the moment of a force exerted at this point of support.

Selon le mode de réalisation décrit, les goupilles et plus généralement de l'élément de verrouillage 7 de type mâle est configuré pour s'étendre dans une direction perpendiculaire à la force de verrouillage F, afin de maximiser la surface de contact globale avec les éléments de type femelle. Par ailleurs, l'agencement de goupilles permet d'éviter d'usiner des éléments de type mâle qui suivent la courbure de la lame sur laquelle ils sont fixés.According to the embodiment described, the pins and more generally of the locking element 7 of the male type is configured to extend in a direction perpendicular to the locking force F, in order to maximize the overall contact area with the elements. of female type. In addition, the arrangement of pins makes it possible to avoid machining male-type elements which follow the curvature of the blade on which they are fixed.

Selon une variante, on pourrait choisir des lames avec des rayons de courbure identiques au repos et dont pour lesquels l'engagement mutuels d'éléments mâles dans des éléments femelles engendrerait une légère modification des rayons de courbure respectifs, un premier rayon de courbure d'une première lame étant augmenté et un deuxième rayon de courbure d'une deuxième lame étant légèrement augmenté.Alternatively, one could choose blades with radii of curvature identical at rest and for which the mutual engagement of male elements in female elements would cause a slight change in the respective radii of curvature, a first radius of curvature of a first blade being raised and a second radius of curvature of a second blade being slightly increased.

Le fermoir 100 décrit dans le cadre de l'invention est particulièrement adapté pour des montres bracelets, mais on comprendra qu'il pourra être employé pour tout type de bracelet, avec ou sans boucle pour l'attache de façon amovible à l'un des brins.The clasp 100 described in the context of the invention is particularly suitable for wristwatches, but it will be understood that it can be used for any type of bracelet, with or without a buckle for releasably attaching to one of the strands.

Claims (12)

  1. Clasp (100) with an unfolding buckle comprising a first blade (1), formed by a central blade, and a second blade (2), formed by a shank having a first leg (21) and a second leg (22), articulated about a hinge (3), wherein said first blade (1) is attached to a first strand (101) and said second blade (2) is attached to a second strand (102) of a strap, said clasp further comprising a locking apparatus for fixing said first blade (1) to said second blade (2) when said blades are folded down on each other in the closed position of the clasp, wherein said locking apparatus comprises a first male locking element (7) and a second female locking element (8) mutually engaged one into the other in the closed position of the clasp, wherein one of said first blade (1) or second blade (2) exerts a locking force (F) between said first locking element (7) and said second locking element (8) in a direction perpendicular to said first locking element (7) in order to maintain their mutual engagement in the closed position of the clasp,
    characterized in that said first locking element (7) is a pin inserted in a transversal hole (12) of said first blade (1), said pin stretching on either side of said first blade (1) in a direction parallel to the one of the axis of said hinge (3).
  2. Clasp (100) with unfolding buckle according to the preceding claim, characterized in that said first male locking element (7) is fixed with respect to one of said first blade (1) or second blade (2).
  3. Clasp (100) with unfolding buckle according to claim 1, characterized in that said second locking element (8) is formed by a first recess (211) disposed in said first leg of the shank (21) and a second recess (221) formed in said second leg (22) of the shank.
  4. Clasp (100) with unfolding buckle according to claim 3, characterized in that said first and second legs (21,22) of said shank are secured to a first attaching bar (4) for a buckle (5) fitted with an attaching pin (54) for attaching said second strand (102), said first blade (1) having a central cylindrical recess (11) for lodging said attaching bar (4), and a second hole (13) for letting said pin (54) pass through.
  5. Clasp (100) with unfolding buckle according to claim 4, characterized in that said first and second recesses (211,221) are arranged on the underside (24) of said shank and said cylindrical recess (11) is arranged on the upper side (15) of the central blade.
  6. Clasp (100) with unfolding buckle according to claim 4 or 5, characterized in that said first attaching bar (4) is attached to a first end (210) of said first leg (21) of the shank , and to a second attachment end (220) of said second leg (22) of the shank, and that the axis of said first attaching bar (4) and the axis of said pin are spaced apart of at least 5 millimeters.
  7. Clasp (100) with unfolding buckle according to any of claims 1 to 6, characterized in that said second female locking elements (8) define a housing of a depth greater or equal to the size of said first male locking elements (7), and that said first and second legs (21,22) of the shank respectively comprise a first and a second bossing (212, 222).
  8. Clasp (100) with unfolding buckle according to any of claims 1 to 7, characterized in that said first and second legs (21,22) of the shank respectively comprise a first and a second inclined contact surface (213,223).
  9. Clasp (100) with unfolding buckle according to any of claims 1 to 8, characterized in that the pin extends up to the outer side walls (20) of said first and second legs.
  10. Clasp (100) according to any of the preceding claims, characterized in that said first blade (1) comprises a fixing piece (14) of a fastening piece (6) provided with a central claw (61) for fixing said first strand (101).
  11. Clasp (100) with unfolding buckle according to one of the preceding claims, wherein said first blade (1) and said second blade (2) have respective radii of curvature (C1) and (C2) which are different in a resting unlocked position (D) of the clasp.
  12. Clasp (100) with unfolding buckle according to one of the preceding claims, characterized in that the first male locking elements (7) are made of a harder material than the part in which are the second female locking elements (8) are machined.
EP12157481.8A 2012-02-29 2012-02-29 Clasp with extensible loop Active EP2633776B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP12157481.8A EP2633776B1 (en) 2012-02-29 2012-02-29 Clasp with extensible loop
CN201310086182.4A CN103284417B (en) 2012-02-29 2013-02-28 With the hasp of deploying type bracelet
JP2013038554A JP5695104B2 (en) 2012-02-29 2013-02-28 Cushion with unfolding buckle
HK14102268.5A HK1189135A1 (en) 2012-02-29 2014-03-06 Fermoir a boucle deployante

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12157481.8A EP2633776B1 (en) 2012-02-29 2012-02-29 Clasp with extensible loop

Publications (2)

Publication Number Publication Date
EP2633776A1 EP2633776A1 (en) 2013-09-04
EP2633776B1 true EP2633776B1 (en) 2015-09-02

Family

ID=45808198

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12157481.8A Active EP2633776B1 (en) 2012-02-29 2012-02-29 Clasp with extensible loop

Country Status (4)

Country Link
EP (1) EP2633776B1 (en)
JP (1) JP5695104B2 (en)
CN (1) CN103284417B (en)
HK (1) HK1189135A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3626097A1 (en) 2013-03-15 2020-03-25 Apple Inc. Attachment apparatuses and associated methods of use and manufacture
CN103734888B (en) * 2014-01-25 2016-06-01 无锡科安自动化装备有限公司 There is the Bulking tank of easy opening encapsulation door
US10064460B2 (en) 2015-09-30 2018-09-04 Apple Inc. Frictional stabilization of band and securement mechanism
US10219591B2 (en) 2016-03-21 2019-03-05 Apple Inc. Attachment system for an electronic device
US10149518B1 (en) 2016-08-08 2018-12-11 Apple Inc. Clasp assembly for a wearable device
CN108652147B (en) * 2018-04-18 2020-06-23 瑞信五金(河源)有限公司 Watch buckle capable of adjusting tightness of watchband and watch
CN110522132A (en) * 2019-09-10 2019-12-03 赵洪飞 A kind of motion bracelet with positioning function

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Publication number Priority date Publication date Assignee Title
JP2544298Y2 (en) * 1990-02-02 1997-08-13 シチズン時計株式会社 Band clasp
JPH04133714U (en) * 1991-05-30 1992-12-11 株式会社バンビ Nakadome for leather bands
JPH09191910A (en) * 1995-09-01 1997-07-29 Citizen Watch Co Ltd Double door type inner retaining structure
JP2004073346A (en) * 2002-08-13 2004-03-11 Citizen Watch Co Ltd Belt-shaped accessory
JP4545547B2 (en) * 2004-10-20 2010-09-15 シチズンホールディングス株式会社 Trinket structure of jewelry
DE102008039843A1 (en) * 2008-08-27 2010-03-04 Momoplus Gmbh Snap connection for wristband, has locking element arranged at pivoting handle and engaged into locking recess of base part and prestressed with locking force against release direction, where locking force is adjusted
EP2248437A1 (en) * 2009-05-08 2010-11-10 Dexel S.A. Device for adjusting the useful length of a bracelet and corresponding bracelet clasp
EP2361523B1 (en) * 2010-02-23 2014-06-25 Winox Sa Clasp for bracelet
IT1400461B1 (en) * 2010-06-08 2013-05-31 Opar S R L COMPOSITE CLOSURE FOR PERSONAL USE ACCESSORIES.

Also Published As

Publication number Publication date
CN103284417B (en) 2015-10-07
EP2633776A1 (en) 2013-09-04
JP5695104B2 (en) 2015-04-01
HK1189135A1 (en) 2014-05-30
JP2013180208A (en) 2013-09-12
CN103284417A (en) 2013-09-11

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