EP2524613A1 - Clasp with extensible loop - Google Patents

Clasp with extensible loop Download PDF

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Publication number
EP2524613A1
EP2524613A1 EP12002258A EP12002258A EP2524613A1 EP 2524613 A1 EP2524613 A1 EP 2524613A1 EP 12002258 A EP12002258 A EP 12002258A EP 12002258 A EP12002258 A EP 12002258A EP 2524613 A1 EP2524613 A1 EP 2524613A1
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EP
European Patent Office
Prior art keywords
blade
pusher
folding
fixed blade
folding blade
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.)
Granted
Application number
EP12002258A
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German (de)
French (fr)
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EP2524613B1 (en
Inventor
Vincent Zak
André Chaves
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.)
Boucledor SA
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Boucledor SA
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Filing date
Publication date
Application filed by Boucledor SA filed Critical Boucledor SA
Publication of EP2524613A1 publication Critical patent/EP2524613A1/en
Application granted granted Critical
Publication of EP2524613B1 publication Critical patent/EP2524613B1/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

Definitions

  • the present invention relates to a clasp with a folding clasp and in particular a clasp with a folding clasp for a watch strap.
  • a clasp of this type is known from the document EP 1 279 349 and comprises a female component mounted on an upper folding arm and a male component mounted on a lower folding arm articulated to the upper folding arm.
  • the clasp further comprises a pusher movable against a return spring about a pivot axis fixed relative to the female component to lock the two male and female components by pivoting said pusher.
  • To unlock said clasp it is first necessary to rotate the pusher against the action of the return spring and while maintaining the pusher in its rotated position, it is then necessary to manually disengage the male component of the female component.
  • the unlocking operation takes place in two stages and can be difficult to implement for the wearer of a bracelet provided with such a clasp.
  • the object of the present invention is the production of a clasp with folding clasp whose unlocking is simplified and easily implemented even for the wearer of the bracelet or any other object comprising the clasp.
  • Another object of the present invention is the production of a clasp folding clasp avoiding inadvertent unlocking.
  • the present invention also aims to provide a clasp of simple construction comprising a small number of elements.
  • the fixed blade 1 has two substantially parallel longitudinal members 10, 11.
  • the first movable blade 2 is articulated at the first ends 10a, 11a of the longitudinal members 10, 11 of the fixed blade 1, while the second movable blade 3 is articulated at the second ends 10b, 11b of the longitudinal members 10, 11 of the blade fixed 1.
  • the first and second movable blades 2, 3 are articulated to the fixed blade 1 by means for example of fixing bars 41 and fastening rivets 42. It is obvious that any other suitable means of articulation and known to the one skilled in the art could be used to articulate the movable blades 2, 3 to the fixed blade 1.
  • the fixed blade 1, in particular the longerons 10, 11 and the first and second movable blades 2, 3 are shaped so that the first and second movable blades 2, 3 can be folded on the fixed blade 1 between the side members 10, 11 of said fixed blade 1 so that once folded, the fixed and movable blades 1, 2, 3 are substantially in the same plane and that their thickness does not exceed that of the fixed blade 1 (see figure 3 ).
  • the fixed blade 1 also has a support 12 located between the longitudinal members 10, 11.
  • the longitudinal members 10, 11 and the support 12 forming the fixed blade 1 have come from a single piece obtained for example by a plastic deformation process.
  • the support 12 could be screwed, welded, or otherwise secured to the rails 10, 11.
  • Two pushers 7, 8 are pivotally mounted on the support 12. Each of the two pushers 7, 8 pivots about a respective pivot axis 70, 80 fixed on the support 12 by means of screws 43 for example. In addition, each of the pushers 7, 8 is pivotally mounted on the support 12 of the fixed blade 1 independently against the action of an independent elastic force.
  • the independent elastic force is constituted by return springs 71, 81.
  • the return springs 71, 81 are bending springs of the "pin" type.
  • Each pusher 7, 8 has a flange 72, 82 cooperating respectively with a stop 13, 14 of the support 12 of the fixed blade 1 to limit the rotation of the pushers 7, 8.
  • the return springs 71, 81, the flanges 72, 82 pushers 7, 8 and the stops 13, 14 of the support 12 of the fixed blade 1 are shaped so that under the action of said springs 71, 81, the flanges 72, 82 come into contact with the stops 13, 14 respectively. This position of the pushers 7, 8 bearing against the stops 13, 14 is their rest position.
  • Each of the first and second movable blades 2, 3 has a free end 20, 30.
  • These free ends 20, 30 each comprise fixing means 44 for connecting the first and second movable blades 2, 3 to a bracelet strand, in particular two strands of a watch strap (no illustrated).
  • this bracelet can be elastic or not, leather or metal or have any other suitable form.
  • the free end 20 of the first movable blade 2 has an opening 21 in which is housed a detent ball 6.
  • This detent ball 6 is intended to cooperate with a stud 9 fixed on the support 12 of the fixed blade 1 by means of a screw 45 for example.
  • the opening 21, the detent ball 6 and the stud 9 form resilient locking means shaped to maintain the first movable blade 2 in its folded position on the fixed blade 1. This position of the first movable blade 2 in which it is held folded on the fixed blade 1 by the resilient locking means is a first locked position of the first movable blade 2 relative to the fixed blade 1.
  • the free end 30 of the second movable blade 3 has in turn two shoulders 31 arranged laterally on either side of the movable blade 3 (only one shoulder is clearly visible in the figures). These shoulders 31 may for example be obtained by cutting in the second movable blade 3. These shoulders 31 are intended to cooperate respectively with a rounded flank 73, 83 of each of the pushers 7, 8.
  • the shoulder 31 and the rounded flanks 73, 83 pushers 7, 8 are shaped so that when the second movable blade 3 is folded over the fixed blade 1, the two shoulders 31 respectively come into contact with the rounded sides 73, 83 of the pushers 7, 8.
  • the pushers 7, 8 each further comprise a lug 74, 84 respectively having an inclined plane 75, 85.
  • the lugs 74, 84 are intended to cooperate with the free end 20 of the first movable blade 2 to release it from its first locked position relative to the fixed blade 1. In the first locked position of the first movable blade 2 relative to the fixed blade, by pivoting the pushers 7, 8 against the action of their respective return spring 71, 81 said lugs 74, 84 come into contact with inclined planes 22 of the free end 20 of the first fixed blade 2.
  • the inclined planes 75, 85 of said lugs 74, 84 and said inclined planes 22 of the free end 20 of the first movable blade 2 respectively cooperate to lift the first movable blade 2 relative to the fixed blade 1 and release said blade 2 from the action of the elastic locking means by disengaging the detent ball 6 of the stud 9.
  • the first and second movable blades 2, 3 are unfolded relative to the fixed blade 1.
  • the first movable blade 2 is folded over the fixed blade 1 to be brought into its first locked position relative to said fixed blade 1, in which position the elastic locking means keep folded on said fixed blade 1.
  • the first movable blade 2 is folded over the fixed blade 1 until the detent ball 6 of the free end 20 of the first movable blade 2 cooperates with the stud 9 fixed on the support 12 of the fixed blade 1, to lock the first movable blade 2 in its first locked position.
  • the second movable blade 3 is then folded over the fixed blade 1. As described above, by folding the second movable blade 3 on the fixed blade 1, the shoulder 31 of the free end 30 of the second movable blade 3 come into contact respectively against the rounded flanks 73, 83 of the pushers 7, 8. A force exerted on the second movable blade 3 parallel to the pivot axes 70, 80 of the pushers 7, 8 and directed towards the support 12 rotates said pushers 7, 9 against the action of their respective return spring 71, 81 following the cooperation of the shoulder 31 of the second movable blade 3 and the rounded flanks 73, 83 of the pushers 7, 8. The second movable blade 3 can then be fully folded over the fixed blade 1 and the pushers 7, 8 resume their rest position under the action of their respective return spring 71, 81, rest position in which they now cover the shoulders 31 preventing the deployment of the second movable blade 3.
  • the second locking means consist of a covering of a part of the first movable blade 2 by the second movable blade 3.
  • the free end 20 of the first movable blade 2 has a projection 23 intended to to become housed in a clearance 32 of the free end of the second movable blade 3.
  • the free end 30 of the second movable blade 3 partly covers the free end 20 of the first movable blade 2 when said first movable blade 2 is in its locked position relative to the fixed blade and the second movable blade 3 is folded over the fixed blade 1.
  • the second movable blade 3 is held in its folded position by the pushers 7, 8 which cover the shoulders 31 of said second movable blade 3 and the first movable blade 2 is held in its locked position at the both by the resilient locking means and by the covering of the second movable blade 3. Therefore, in the locked position of the clasp, a force exerted on the first movable blade 2 and directed substantially perpendicular to the longitudinal axis of said blade towards the outside of the clasp fails to unfold said blade, and in particular fails to release the first movable blade resilient locking means.
  • the locking of the clasp is particularly safe: indeed, once the clasp is locked, the first and second movable blades 2, 3 can not be deployed by the action of a force exerted on said blades and directed essentially parallel to the pivot axes 70, 80 of the pushers 7, 8 and away from the support 12 nor by the action of a force exerted on said blades and directed substantially parallel to their longitudinal axis.
  • the pivoting of the pushers 7, 8 has two simultaneous effects which have been described separately above: first, the lugs 74, 84 of the pushers 7, 8 cooperate with the inclined planes 22 of the free end 20 of the first movable blade 2 to lift it and release the elastic locking means, that is to say disengage the latching ball 6 of the stud 9 carried by the support 12. At the same time, from the pivoting of the pushers 7, 8 against their respective return spring 71, 81, the shoulder 31 of the free end 30 of the second movable blade 3 are no longer covered by said pushers 7, 8 and the second movable blade is free to be unfolded.
  • the first movable blade 2 raised by the lugs 74, 84 of the pushers 7, 8 then drives with it the second movable blade 3 by the cooperation between the projection 23 of the free end 20 of the first blade 2 and the clearance 32 of the free end 30 of the second movable blade 3.
  • simultaneous pressing of the two pushers 7, 8 allows to release simultaneously and in one operation the first and second movable blades 2, 3.
  • the disengagement of the latching ball of the stud 9 at the moment of unlocking the clasp eject the first movable blade 2 and the second movable blade 3 simultaneously from the fixed blade.
  • no other action than the simultaneous pressing of the two pushers 7, 8 is necessary to unlock the clasp and in particular to separate the first and second movable blades 2, 3 of the fixed blade 1.
  • the clasp according to the invention may not include elastic locking means for holding the first movable blade 2 in its folded position on the fixed blade 1 when the second movable blade 3 is unfolded.
  • locking the clasp is less easy since once the first movable blade 2 folded on the fixed blade 1, nothing maintains said first movable blade 2 in this position until the second movable blade 3 is at his turn folded on the fixed blade.
  • the absence of elastic locking means does not influence the unlocking of a clasp according to this variant which is in all respects similar to that described above.
  • a clasp according to this variant therefore has the same advantages as the clasp described above as to its unlocking.
  • the resilient locking means could comprise two detent balls each located on a lateral side of the first movable blade 2 and cooperating with respective notches present on the inner sides of the longitudinal members 10, 11 of the fixed blade.
  • the other components of a clasp according to this variant, its locking and unlocking are in all respects similar to those described above.
  • the clasp according to the invention could have only one pusher 7 pivotally mounted on the support 12. Said single pusher would be in this variant completely similar to one of the pushers 7, 8 described in the form of execution above.
  • the modifications implied by such a variant for the other components of the clasp, its locking and unlocking will be clear to those skilled in the art.
  • the clasp according to the invention has many advantages.
  • the clasp being shaped to "eject" simultaneously the two movable blades 2, 3 when the user simultaneously presses the two pushers 7, 8, the unlocking of the clasp is greatly facilitated and is done in one operation for the user: it is indeed not necessary to dislodge manually one of the movable blades 2, 3.
  • the clasp according to the invention comprises few parts thus reducing its size and making it suitable for any type of bracelet.
  • the parts that compose it are easily achievable by a plastic deformation process for example also facilitating the miniaturization of the clasp.

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Abstract

The clasp has a first and second mobile blades (2, 3) arranged such that the second blade covers the first blade when the mobile blades are folded on a fixed blade (1). A push-button (7) has unlocking units arranged such that the second blade covers a portion of the first blade and is locked by the push-button when the mobile blades are folded. The units cooperate with the first blade to lift and space the fixed blade that drives the second blade with it, to release the second blade from locking action of the push-button when the push-button is pivoted against action of a return spring (71). The return spring is an edge spring.

Description

La présente invention a pour objet un fermoir à boucle déployante et notamment un fermoir à boucle déployante pour bracelet de montre.The present invention relates to a clasp with a folding clasp and in particular a clasp with a folding clasp for a watch strap.

Un fermoir de ce type est connu du document EP 1 279 349 et comprend un composant femelle monté sur un bras dépliant supérieur et un composant mâle monté sur un bras dépliant inférieur articulé au bras dépliant supérieur. Le fermoir comprend en outre un poussoir mobile contre un ressort de rappel autour d'un axe de pivotement fixe par rapport au composant femelle pour verrouiller les deux composants mâle et femelle par pivotement dudit poussoir. Pour déverrouiller ledit fermoir, il faut tout d'abord faire pivoter le poussoir contre l'action du ressort de rappel et tout en maintenant le poussoir dans sa position pivotée, il faut ensuite désengager manuellement le composant mâle du composant femelle. Ainsi l'opération de déverrouillage se passe en deux temps et peut s'avérer délicate à mettre en oeuvre pour le porteur d'un bracelet muni d'un tel fermoir.A clasp of this type is known from the document EP 1 279 349 and comprises a female component mounted on an upper folding arm and a male component mounted on a lower folding arm articulated to the upper folding arm. The clasp further comprises a pusher movable against a return spring about a pivot axis fixed relative to the female component to lock the two male and female components by pivoting said pusher. To unlock said clasp, it is first necessary to rotate the pusher against the action of the return spring and while maintaining the pusher in its rotated position, it is then necessary to manually disengage the male component of the female component. Thus the unlocking operation takes place in two stages and can be difficult to implement for the wearer of a bracelet provided with such a clasp.

Le but de la présente invention est la réalisation d'un fermoir à boucle déployante dont le déverrouillage est simplifié et aisément mis en oeuvre même pour le porteur du bracelet ou tout autre objet comprenant le fermoir. Un autre but de la présente invention est la réalisation d'un fermoir à boucle déployante évitant tout déverrouillage intempestif. La présente invention a également pour but la réalisation d'un fermoir de construction simple comprenant un petit nombre d'éléments.The object of the present invention is the production of a clasp with folding clasp whose unlocking is simplified and easily implemented even for the wearer of the bracelet or any other object comprising the clasp. Another object of the present invention is the production of a clasp folding clasp avoiding inadvertent unlocking. The present invention also aims to provide a clasp of simple construction comprising a small number of elements.

La présente invention a pour objet un fermoir déployant comprenant une lame fixe, une première lame dépliante articulée à une première extrémité de la lame fixe et une seconde lame dépliante articulée à une seconde extrémité de la lame fixe, et au moins un poussoir monté pivotant autour d'un axe de pivotement sur la lame fixe contre l'action d'une force élastique de rappel, le fermoir présentant les caractéristiques suivantes :

  • les première et seconde lames dépliantes sont agencées pour qu'une fois repliées sur la lame fixe, la seconde lame dépliante recouvre en partie la première lame dépliante, de manière à ce que, à partir de leur position repliée sur la lame fixe, tout déploiement de la première lame dépliante entraîne un déploiement de la seconde lame dépliante ;
  • le poussoir et la seconde lame dépliante sont agencés pour que lorsque la seconde lame dépliante est repliée sur la lame fixe, ladite seconde lame dépliante vienne en butée contre le poussoir et pour qu'une force exercée sur ladite lame dépliante essentiellement parallèlement à l'axe de pivotement du poussoir et dirigée vers la lame fixe entraîne le pivotement du poussoir d'une première amplitude amenant ledit poussoir dans une première position où la seconde lame dépliante n'est plus en butée contre ledit poussoir et peut être rabattue complètement sur la lame fixe et pour que le poussoir rappelé depuis ladite première position dans sa position initiale de repos par la force élastique de rappel empêche tout mouvement de la seconde lame dépliante par rapport à la lame fixe ;
  • le poussoir présente encore des moyens de déverrouillage agencés pour que, lorsque les première et seconde lames dépliantes sont repliées sur la lame fixe, la seconde lame dépliante recouvrant une partie de la première et étant verrouillée par le poussoir, un pivotement du poussoir contre l'action de la force élastique d'une seconde amplitude, plus grande que la première amplitude amène ledit poussoir dans une seconde position dans laquelle le poussoir n'empêche plus le déploiement de la seconde lame dépliante et dans laquelle lesdits moyens de déverrouillage coopèrent avec la première lame dépliante pour la soulever et l'écarter de la lame fixe entraînant avec elle la seconde lame dépliante.
The present invention relates to a folding clasp comprising a fixed blade, a first folding blade articulated to a first end of the fixed blade and a second folding blade hinged to a second end of the fixed blade, and at least one pusher pivotally mounted around a pivot axis on the fixed blade against the action of an elastic return force, the clasp having the following characteristics:
  • the first and second folding blades are arranged so that when folded on the fixed blade, the second folding blade partially covers the first folding blade, so that, from their folded position on the fixed blade, any deployment the first folding blade causes a deployment of the second folding blade;
  • the pusher and the second folding blade are arranged so that when the second folding blade is folded over the fixed blade, said second folding blade comes into abutment against the pusher and for a force exerted on said folding blade substantially parallel to the axis pivoting the pusher and directed towards the fixed blade causes the pivoting of the pusher of a first amplitude bringing said pusher in a first position where the second folding leaf is no longer in abutment against said pusher and can be folded completely on the fixed blade and for the pusher recalled from said first position to its initial rest position by the elastic return force prevents any movement of the second folding blade relative to the fixed blade;
  • the pusher still has unlocking means arranged so that, when the first and second folding blades are folded over the fixed blade, the second folding blade covering a portion of the first and being locked by the pusher, a pivoting of the pusher against the action of the elastic force of a second amplitude, greater than the first amplitude brings said pusher in a second position in which the pusher no longer prevents the deployment of the second folding blade and wherein said unlocking means cooperate with the first folding blade to lift it and away from the fixed blade taking with it the second folding blade.

Les dessins annexés illustrent schématiquement et à titre d'exemple uniquement une forme d'exécution d'un fermoir à boucle déployante selon la présente invention.

  • La figure 1 est une vue éclatée du fermoir à boucle déployante selon l'invention.
  • La figure 2 illustre le fermoir selon l'invention en position déverrouillée, les lames du fermoir étant déployées.
  • La figure 3 illustre le fermoir selon l'invention en position verrouillée.
  • Les figures 4a à 4c illustrent l'opération de déverrouillage du fermoir selon l'invention illustré aux figures 1 à 3.
  • Un fermoir à boucle déployante selon l'invention et tel qu'illustré à la figure 1 comprend une lame fixe 1 sur laquelle sont articulées une première lame mobile 2 et une seconde lame mobile 3.
The accompanying drawings illustrate schematically and by way of example only one embodiment of a clasp folding clasp according to the present invention.
  • The figure 1 is an exploded view of the clasp folding clasp according to the invention.
  • The figure 2 illustrates the clasp according to the invention in the unlocked position, the clasp blades being deployed.
  • The figure 3 illustrates the clasp according to the invention in locked position.
  • The Figures 4a to 4c illustrate the operation of unlocking the clasp according to the invention illustrated in FIGS. Figures 1 to 3 .
  • A clasp with a folding clasp according to the invention and as illustrated in FIG. figure 1 comprises a fixed blade 1 on which are articulated a first movable blade 2 and a second movable blade 3.

De préférence, la lame fixe 1 présente deux longerons 10, 11 essentiellement parallèles. La première lame mobile 2 est articulée à des premières extrémités 10a, 11a des longerons 10, 11 de la lame fixe 1, tandis que la seconde lame mobile 3 est articulée à des secondes extrémités 10b, 11 b des longerons 10, 11 de la lame fixe 1. Les première et seconde lames mobiles 2, 3 sont articulées à la lame fixe 1 au moyen par exemple de barrettes de fixation 41 et de rivets de fixation 42. Il est évident que tout autre moyen d'articulation approprié et connu de l'homme du métier pourrait être utilisé pour articuler les lames mobiles 2, 3 à la lame fixe 1.Preferably, the fixed blade 1 has two substantially parallel longitudinal members 10, 11. The first movable blade 2 is articulated at the first ends 10a, 11a of the longitudinal members 10, 11 of the fixed blade 1, while the second movable blade 3 is articulated at the second ends 10b, 11b of the longitudinal members 10, 11 of the blade fixed 1. The first and second movable blades 2, 3 are articulated to the fixed blade 1 by means for example of fixing bars 41 and fastening rivets 42. It is obvious that any other suitable means of articulation and known to the one skilled in the art could be used to articulate the movable blades 2, 3 to the fixed blade 1.

De préférence, la lame fixe 1, en particulier les longerons 10, 11 et les première et seconde lames mobiles 2, 3 sont conformés de sorte que les première et seconde lames mobiles 2, 3 puissent être rabattues sur la lame fixe 1 entre les longerons 10, 11 de ladite lame fixe 1 de manière à ce qu'une fois repliées, les lames fixe et mobiles 1, 2, 3 soient essentiellement dans le même plan et que leur épaisseur ne dépasse pas celle de la lame fixe 1 (voir figure 3).Preferably, the fixed blade 1, in particular the longerons 10, 11 and the first and second movable blades 2, 3 are shaped so that the first and second movable blades 2, 3 can be folded on the fixed blade 1 between the side members 10, 11 of said fixed blade 1 so that once folded, the fixed and movable blades 1, 2, 3 are substantially in the same plane and that their thickness does not exceed that of the fixed blade 1 (see figure 3 ).

La lame fixe 1 présente encore un support 12 situé entre les longerons 10, 11. De préférence et dans la forme d'exécution illustrée, les longerons 10, 11 et le support 12 formant la lame fixe 1 sont venus d'une seule pièce obtenue par exemple par un procédé de déformation plastique. En variante, le support 12 pourrait être vissé, soudé ou fixé de toute autre manière appropriée aux longerons 10, 11.The fixed blade 1 also has a support 12 located between the longitudinal members 10, 11. Preferably and in the embodiment shown, the longitudinal members 10, 11 and the support 12 forming the fixed blade 1 have come from a single piece obtained for example by a plastic deformation process. Alternatively, the support 12 could be screwed, welded, or otherwise secured to the rails 10, 11.

Deux poussoirs 7, 8 sont montés pivotants sur le support 12. Chacun des deux poussoirs 7, 8 pivote autour d'un axe de pivotement respectif 70, 80 fixé sur le support 12 au moyen de vis 43 par exemple. De plus, chacun des poussoirs 7, 8 est monté pivotant sur le support 12 de la lame fixe 1 de manière indépendante contre l'action d'une force élastique indépendante. Dans la forme d'exécution illustrée, la force élastique indépendante est constituée par des ressorts de rappel 71, 81. De préférence, les ressorts de rappel 71, 81 sont des ressorts à flexion du type « épingle ».Two pushers 7, 8 are pivotally mounted on the support 12. Each of the two pushers 7, 8 pivots about a respective pivot axis 70, 80 fixed on the support 12 by means of screws 43 for example. In addition, each of the pushers 7, 8 is pivotally mounted on the support 12 of the fixed blade 1 independently against the action of an independent elastic force. In the embodiment shown, the independent elastic force is constituted by return springs 71, 81. Preferably, the return springs 71, 81 are bending springs of the "pin" type.

Chaque poussoir 7, 8 présente un rebord 72, 82 coopérant respectivement avec une butée 13, 14 du support 12 de la lame fixe 1 pour limiter la rotation des poussoirs 7, 8. Les ressorts de rappel 71, 81, les rebords 72, 82 des poussoirs 7, 8 et les butées 13, 14 du support 12 de la lame fixe 1 sont conformés de sorte que sous l'action desdits ressorts 71, 81, les rebords 72, 82 viennent en contact avec les butées 13, 14 respectivement. Cette position des poussoirs 7, 8 en appui contre les butées 13, 14 constitue leur position de repos. Ainsi, en position de repos des poussoirs 7, 8, une pression sur chacun desdits poussoirs 7, 8 exercée par un utilisateur perpendiculairement à leur axe de pivotement 70, 80 en direction de l'intérieur des longerons 10, 11 de la lame fixe 1 fait pivoter chaque poussoir 7, 8 dans une direction unique contre l'action de leur ressort de rappel 71, 81.Each pusher 7, 8 has a flange 72, 82 cooperating respectively with a stop 13, 14 of the support 12 of the fixed blade 1 to limit the rotation of the pushers 7, 8. The return springs 71, 81, the flanges 72, 82 pushers 7, 8 and the stops 13, 14 of the support 12 of the fixed blade 1 are shaped so that under the action of said springs 71, 81, the flanges 72, 82 come into contact with the stops 13, 14 respectively. This position of the pushers 7, 8 bearing against the stops 13, 14 is their rest position. Thus, in the rest position of the pushers 7, 8, a pressure on each of said pushers 7, 8 exerted by a user perpendicular to their pivot axis 70, 80 towards the inside of the longitudinal members 10, 11 of the fixed blade 1 rotates each pusher 7, 8 in a single direction against the action of their return spring 71, 81.

Chacune des première et seconde lames mobiles 2, 3 présente une extrémité libre 20, 30. Ces extrémités libres 20, 30 comprennent chacune des moyens de fixation 44 permettant de relier les première et seconde lames mobiles 2, 3 à un brin de bracelet, notamment aux deux brins d'un bracelet de montre (non illustré). De manière évidente pour l'homme du métier, ce bracelet peut être élastique ou non, en cuir ou en métal ou avoir toute autre forme appropriée.Each of the first and second movable blades 2, 3 has a free end 20, 30. These free ends 20, 30 each comprise fixing means 44 for connecting the first and second movable blades 2, 3 to a bracelet strand, in particular two strands of a watch strap (no illustrated). Obviously for the skilled person, this bracelet can be elastic or not, leather or metal or have any other suitable form.

L'extrémité libre 20 de la première lame mobile 2 présente une ouverture 21 dans laquelle est logée une bille d'encliquetage 6. Cette bille d'encliquetage 6 est destinée à coopérer avec un plot 9 fixé sur le support 12 de la lame fixe 1 au moyen d'une vis 45 par exemple. L'ouverture 21, la bille d'encliquetage 6 et le plot 9 forment des moyens de verrouillage élastiques conformés pour maintenir la première lame mobile 2 dans sa position repliée sur la lame fixe 1. Cette position de la première lame mobile 2 dans laquelle elle est maintenue repliée sur la lame fixe 1 par les moyens de verrouillage élastiques constitue une première position verrouillée de la première lame mobile 2 par rapport à la lame fixe 1. Pour déployer à nouveau la première lame mobile 2 depuis sa première position verrouillée, il faut appliquer à ladite lame mobile 2 une force dirigée essentiellement perpendiculairement à l'axe longitudinal de ladite lame vers l'extérieur du fermoir (en s'éloignant de la lame fixe 1) pour désencliqueter la bille d'encliquetage 6 du plot 9.The free end 20 of the first movable blade 2 has an opening 21 in which is housed a detent ball 6. This detent ball 6 is intended to cooperate with a stud 9 fixed on the support 12 of the fixed blade 1 by means of a screw 45 for example. The opening 21, the detent ball 6 and the stud 9 form resilient locking means shaped to maintain the first movable blade 2 in its folded position on the fixed blade 1. This position of the first movable blade 2 in which it is held folded on the fixed blade 1 by the resilient locking means is a first locked position of the first movable blade 2 relative to the fixed blade 1. To deploy again the first movable blade 2 from its first locked position, it is necessary to applying to said moving blade 2 a force directed substantially perpendicular to the longitudinal axis of said blade towards the outside of the clasp (away from the fixed blade 1) to disengage the detent ball 6 from the stud 9.

L'extrémité libre 30 de la seconde lame mobile 3 présente quant à elle deux épaulements 31 disposés latéralement de part et d'autre de la lame mobile 3 (un seul épaulement est clairement visible sur les figures). Ces épaulements 31 peuvent par exemple être obtenus par découpe dans la seconde lame mobile 3. Ces épaulements 31 sont destinés à coopérer respectivement avec un flanc arrondi 73, 83 de chacun des poussoirs 7, 8. Les épaulement 31 et les flancs arrondis 73, 83 des poussoirs 7, 8 sont conformés de sorte que lorsque la seconde lame mobile 3 est repliée sur la lame fixe 1, les deux épaulements 31 viennent respectivement en contact avec les flancs arrondis 73, 83 des poussoirs 7, 8. Lorsqu'une pression est exercée sur la seconde lame mobile 3 selon une direction essentiellement parallèle aux axes de pivotement 70, 80 respectifs des poussoirs 7, 8, lesdits épaulements 31 de la seconde lame mobile 3 coopèrent chacun avec un flanc arrondi 73, 83 des poussoirs 7, 8 pour faire pivoter lesdits poussoirs 7, 8 contre l'action de leur ressort de rappel respectif 71, 81. Lors de ce pivotement des poussoirs 7, 8, les épaulements 31 ne sont alors plus en butée contre les flancs arrondis 73, 83 desdits poussoirs 7, 8 et la seconde lame mobile 3 peut être entièrement repliée sur la lame fixe 1. Les poussoirs 7, 8, qui ne sont plus bloqués par la seconde lame mobile 3 et ses épaulement 31 pivotent alors sous l'action de leur ressort de rappel 71, 81 respectif pour retrouver leur position de repos. En pivotant pour reprendre leur position de repos, les poussoirs 7, 8 viennent recouvrir lesdits épaulement 31 empêchant tout mouvement de la seconde lame mobile 3 par rapport à la lame fixe 1 et en particulier son déploiement.The free end 30 of the second movable blade 3 has in turn two shoulders 31 arranged laterally on either side of the movable blade 3 (only one shoulder is clearly visible in the figures). These shoulders 31 may for example be obtained by cutting in the second movable blade 3. These shoulders 31 are intended to cooperate respectively with a rounded flank 73, 83 of each of the pushers 7, 8. The shoulder 31 and the rounded flanks 73, 83 pushers 7, 8 are shaped so that when the second movable blade 3 is folded over the fixed blade 1, the two shoulders 31 respectively come into contact with the rounded sides 73, 83 of the pushers 7, 8. When a pressure is exerted on the second movable blade 3 in a direction substantially parallel to the pivot axes 70, 80 respectively of the pushers 7, 8, said shoulders 31 of the second movable blade 3 each cooperate with a rounded flank 73, 83 of the pushers 7, 8 for rotate said pushers 7, 8 against the action of their respective return spring 71, 81. During this pivoting of the pushers 7, 8, the shoulders 31 are no longer in abutment against the rounded sides 73, 83 of said pushers 7, 8 and the second movable blade 3 can be fully folded over the fixed blade 1. The pushers 7, 8, which are no longer locked by the second movable blade 3 and its shoulder 31 then pivot under the action of their return spring 71, 81 respective to find their rest position. By pivoting to resume their rest position, the pushers 7, 8 cover said shoulder 31 preventing any movement of the second movable blade 3 relative to the fixed blade 1 and in particular its deployment.

Les poussoirs 7, 8 comprennent encore chacun un ergot 74, 84 présentant respectivement un plan incliné 75, 85. Les ergots 74, 84 sont destinés à coopérer avec l'extrémité libre 20 de la première lame mobile 2 pour libérer celle-ci de sa première position verrouillée par rapport à la lame fixe 1. Dans la première position verrouillée de la première lame mobile 2 par rapport à la lame fixe, en faisant pivoter les poussoirs 7, 8 contre l'action de leur ressort de rappel 71, 81 respectif, lesdits ergots 74, 84 viennent en contact avec des plans inclinés 22 de l'extrémité libre 20 de la première lame fixe 2. Les plans inclinés 75, 85 desdits ergots 74, 84 et lesdits plans inclinés 22 de l'extrémité libre 20 de la première lame mobile 2 coopèrent respectivement pour soulever la première lame mobile 2 par rapport à la lame fixe 1 et libérer ladite lame 2 de l'action des moyens de verrouillage élastiques en désencliquetant la bille d'encliquetage 6 du plot 9.The pushers 7, 8 each further comprise a lug 74, 84 respectively having an inclined plane 75, 85. The lugs 74, 84 are intended to cooperate with the free end 20 of the first movable blade 2 to release it from its first locked position relative to the fixed blade 1. In the first locked position of the first movable blade 2 relative to the fixed blade, by pivoting the pushers 7, 8 against the action of their respective return spring 71, 81 said lugs 74, 84 come into contact with inclined planes 22 of the free end 20 of the first fixed blade 2. The inclined planes 75, 85 of said lugs 74, 84 and said inclined planes 22 of the free end 20 of the first movable blade 2 respectively cooperate to lift the first movable blade 2 relative to the fixed blade 1 and release said blade 2 from the action of the elastic locking means by disengaging the detent ball 6 of the stud 9.

Le verrouillage du fermoir selon l'invention va maintenant être décrit en référence aux figures 1 à 3.Locking of the clasp according to the invention will now be described with reference to Figures 1 to 3 .

Dans la position initiale déverrouillée du fermoir illustrée à la figure 2, les première et seconde lame mobiles 2, 3 sont dépliées par rapport à la lame fixe 1. A partir de cette position déverrouillée, la première lame mobile 2 est repliée sur la lame fixe 1 pour être amenée dans sa première position verrouillée par rapport à ladite lame fixe 1, position dans laquelle les moyens de verrouillage élastiques la maintiennent repliée sur ladite lame fixe 1. Dans le mode d'exécution illustré, la première lame mobile 2 est repliée sur la lame fixe 1 jusqu'à ce que la bille d'encliquetage 6 de l'extrémité libre 20 de la première lame mobile 2 coopère avec le plot 9 fixé sur le support 12 de la lame fixe 1, pour bloquer la première lame mobile 2 dans sa première position verrouillée.In the unlocked initial position of the clasp illustrated in figure 2 the first and second movable blades 2, 3 are unfolded relative to the fixed blade 1. From this unlocked position, the first movable blade 2 is folded over the fixed blade 1 to be brought into its first locked position relative to said fixed blade 1, in which position the elastic locking means keep folded on said fixed blade 1. In the illustrated embodiment, the first movable blade 2 is folded over the fixed blade 1 until the detent ball 6 of the free end 20 of the first movable blade 2 cooperates with the stud 9 fixed on the support 12 of the fixed blade 1, to lock the first movable blade 2 in its first locked position.

La seconde lame mobile 3 est ensuite repliée sur la lame fixe 1. Comme décrit plus haut, en repliant la seconde lame mobile 3 sur la lame fixe 1, les épaulement 31 de l'extrémité libre 30 de la seconde lame mobile 3 viennent en contact contre respectivement les flancs arrondis 73, 83 des poussoirs 7, 8. Une force exercée sur la seconde lame mobile 3 parallèlement aux axes de pivotement 70, 80 des poussoirs 7, 8 et dirigée vers le support 12 fait pivoter lesdits poussoirs 7, 9 contre l'action de leur ressort de rappel respectif 71, 81 suite à la coopération des épaulement 31 de la seconde lame mobile 3 et des flancs arrondis 73, 83 des poussoirs 7, 8. La seconde lame mobile 3 peut alors être entièrement repliée sur la lame fixe 1 et les poussoirs 7, 8 reprennent leur position de repos sous l'action de leur ressort de rappel 71, 81 respectif, position de repos dans laquelle ils recouvrent désormais les épaulements 31 empêchant le déploiement de la seconde lame mobile 3.The second movable blade 3 is then folded over the fixed blade 1. As described above, by folding the second movable blade 3 on the fixed blade 1, the shoulder 31 of the free end 30 of the second movable blade 3 come into contact respectively against the rounded flanks 73, 83 of the pushers 7, 8. A force exerted on the second movable blade 3 parallel to the pivot axes 70, 80 of the pushers 7, 8 and directed towards the support 12 rotates said pushers 7, 9 against the action of their respective return spring 71, 81 following the cooperation of the shoulder 31 of the second movable blade 3 and the rounded flanks 73, 83 of the pushers 7, 8. The second movable blade 3 can then be fully folded over the fixed blade 1 and the pushers 7, 8 resume their rest position under the action of their respective return spring 71, 81, rest position in which they now cover the shoulders 31 preventing the deployment of the second movable blade 3.

Afin de garantir un bon verrouillage du fermoir et en particulier de la première lame mobile 2 des seconds moyens de verrouillage de la première lame mobile 2 sont prévus en plus des moyens de verrouillage élastiques. Ces seconds moyens de verrouillage consistent en un recouvrement d'une partie de la première lame mobile 2 par la seconde lame mobile 3. Dans la forme d'exécution illustrée, l'extrémité libre 20 de la première lame mobile 2 présente une saillie 23 destinée à venir se loger dans un dégagement 32 de l'extrémité libre de la seconde lame mobile 3. Ainsi, l'extrémité libre 30 de la seconde lame mobile 3 recouvre en partie l'extrémité libre 20 de la première lame mobile 2 lorsque ladite première lame mobile 2 est dans sa position verrouillée par rapport à la lame fixe et que la seconde lame mobile 3 est repliée sur la lame fixe 1.In order to ensure a good locking of the clasp and in particular of the first movable blade 2 of the second locking means of the first movable blade 2 are provided in addition to resilient locking means. These second locking means consist of a covering of a part of the first movable blade 2 by the second movable blade 3. In the illustrated embodiment, the free end 20 of the first movable blade 2 has a projection 23 intended to to become housed in a clearance 32 of the free end of the second movable blade 3. Thus, the free end 30 of the second movable blade 3 partly covers the free end 20 of the first movable blade 2 when said first movable blade 2 is in its locked position relative to the fixed blade and the second movable blade 3 is folded over the fixed blade 1.

Ainsi, une fois le fermoir verrouillé, la seconde lame mobile 3 est maintenue dans sa position repliée par les poussoirs 7, 8 qui recouvrent les épaulements 31 de ladite seconde lame mobile 3 et la première lame mobile 2 est maintenue dans sa position verrouillée à la fois par les moyens de verrouillage élastiques et par le recouvrement de la seconde lame mobile 3. Par conséquent, dans la position verrouillée du fermoir, une force exercée sur la première lame mobile 2 et dirigée essentiellement perpendiculairement à l'axe longitudinal de ladite lame vers l'extérieur du fermoir ne parvient pas à déplier ladite lame, et en particulier ne parvient pas à libérer la première lame mobile des moyens de verrouillage élastiques.Thus, once the clasp is locked, the second movable blade 3 is held in its folded position by the pushers 7, 8 which cover the shoulders 31 of said second movable blade 3 and the first movable blade 2 is held in its locked position at the both by the resilient locking means and by the covering of the second movable blade 3. Therefore, in the locked position of the clasp, a force exerted on the first movable blade 2 and directed substantially perpendicular to the longitudinal axis of said blade towards the outside of the clasp fails to unfold said blade, and in particular fails to release the first movable blade resilient locking means.

Pour assurer un bon fonctionnement du fermoir, il est nécessaire que la rotation des poussoirs 7, 8 engendrée par la pression des épaulement 31 de la seconde lame mobile 3 contre les flancs arrondis 73, 83 des poussoirs 7, 8 ne soit pas suffisante pour amener les ergots 74, 84 en contact avec les flancs inclinés 22 de la première lame mobile. Dans le cas contraire, le verrouillage de la seconde lame mobile 3 entraînerait alors simultanément le déverrouillage de la première lame mobile 2 et le fermoir ne pourrait jamais être verrouillé.To ensure proper operation of the clasp, it is necessary that the rotation of the pushers 7, 8 generated by the pressure of the shoulder 31 of the second movable blade 3 against the rounded sides 73, 83 of the pushers 7, 8 is not sufficient to bring the lugs 74, 84 in contact with the inclined flanks 22 of the first movable blade. In the opposite case, the locking of the second movable blade 3 would then simultaneously release the first movable blade 2 and the clasp could never be locked.

De par sa construction, le verrouillage du fermoir est particulièrement sûr : en effet, une fois le fermoir verrouillé, les première et seconde lames mobiles 2, 3 ne peuvent être déployées ni par l'action d'une force exercée sur lesdites lames et dirigée essentiellement parallèlement aux axes de pivotement 70, 80 des poussoirs 7, 8 et s'éloignant du support 12 ni par l'action d'une force exercée sur lesdites lames et dirigée essentiellement parallèlement à leur axe longitudinal.By its construction, the locking of the clasp is particularly safe: indeed, once the clasp is locked, the first and second movable blades 2, 3 can not be deployed by the action of a force exerted on said blades and directed essentially parallel to the pivot axes 70, 80 of the pushers 7, 8 and away from the support 12 nor by the action of a force exerted on said blades and directed substantially parallel to their longitudinal axis.

Le déverrouillage du fermoir selon l'invention va maintenant être décrit en détail en référence aux figures 4a à 4c.The unlocking of the clasp according to the invention will now be described in detail with reference to the Figures 4a to 4c .

A partir de la position verrouillée du fermoir illustrée à la figure 3, l'utilisateur exerce une pression simultanée sur les deux poussoirs 7, 8 pour les faire pivoter contre l'action de leur ressort de rappel respectif 71, 81. Dans cette forme d'exécution, il est essentiel que les deux poussoirs 7, 8 soient actionnés simultanément, le fermoir selon cette forme d'exécution étant conformé pour qu'une pression sur un seul des deux poussoirs 7, 8 ne permette pas son déverrouillage. Ainsi, tout déverrouillage intempestif, suite à un choc notamment, est empêché.From the locked position of the clasp illustrated in figure 3 , the user exerts a simultaneous pressure on the two pushers 7, 8 to rotate against the action of their respective return spring 71, 81. In this embodiment, it is essential that the two pushers 7, 8 are operated simultaneously, the clasp according to this embodiment being shaped so that a pressure on one of the two pushers 7, 8 does not allow its unlocking. Thus, any inadvertent unlocking, following a particular shock, is prevented.

Le pivotement des poussoirs 7, 8 a deux effets simultanés qui ont été décrits séparément ci-dessus : d'abord, les ergots 74, 84 des poussoirs 7, 8 viennent coopérer avec les plans inclinés 22 de l'extrémité libre 20 de la première lame mobile 2 pour soulever celle-ci et la libérer des moyens de verrouillage élastiques, c'est-à-dire désencliqueter la bille d'encliquetage 6 du plot 9 porté par le support 12. Dans le même temps, de part le pivotement des poussoirs 7, 8 contre leur ressort de rappel respectif 71, 81, les épaulement 31 de l'extrémité libre 30 de la seconde lame mobile 3 ne sont plus recouverts par lesdits poussoirs 7, 8 et la seconde lame mobile est donc libre d'être dépliée.The pivoting of the pushers 7, 8 has two simultaneous effects which have been described separately above: first, the lugs 74, 84 of the pushers 7, 8 cooperate with the inclined planes 22 of the free end 20 of the first movable blade 2 to lift it and release the elastic locking means, that is to say disengage the latching ball 6 of the stud 9 carried by the support 12. At the same time, from the pivoting of the pushers 7, 8 against their respective return spring 71, 81, the shoulder 31 of the free end 30 of the second movable blade 3 are no longer covered by said pushers 7, 8 and the second movable blade is free to be unfolded.

La première lame mobile 2 soulevée par les ergots 74, 84 des poussoirs 7, 8 entraîne alors avec elle la seconde lame mobile 3 de par la coopération entre la saillie 23 de l'extrémité libre 20 de la première lame 2 et le dégagement 32 de l'extrémité libre 30 de la seconde lame mobile 3. Ainsi, une pression simultanée des deux poussoirs 7, 8 permet de libérer en même temps et en une opération les premières et secondes lames mobiles 2, 3. De plus, dans la présente forme d'exécution, le désencliquetage de la bille d'encliquetage du plot 9 au moment du déverrouillage du fermoir éjectent la première lame mobile 2 et la seconde lame mobile 3 simultanément de la lame fixe. Ainsi, aucune autre action que la pression simultanée des deux poussoirs 7, 8 n'est nécessaire pour déverrouiller le fermoir et en particulier désolidariser les première et seconde lames mobiles 2, 3 de la lame fixe 1.The first movable blade 2 raised by the lugs 74, 84 of the pushers 7, 8 then drives with it the second movable blade 3 by the cooperation between the projection 23 of the free end 20 of the first blade 2 and the clearance 32 of the free end 30 of the second movable blade 3. Thus, simultaneous pressing of the two pushers 7, 8 allows to release simultaneously and in one operation the first and second movable blades 2, 3. In addition, in the present form execution, the disengagement of the latching ball of the stud 9 at the moment of unlocking the clasp eject the first movable blade 2 and the second movable blade 3 simultaneously from the fixed blade. Thus, no other action than the simultaneous pressing of the two pushers 7, 8 is necessary to unlock the clasp and in particular to separate the first and second movable blades 2, 3 of the fixed blade 1.

La présente forme d'exécution a été décrite à tire d'exemple uniquement. En variante, le fermoir selon l'invention pourrait ne pas comprendre de moyens élastiques de verrouillage permettant de maintenir la première lame mobile 2 dans sa position repliée sur la lame fixe 1 lorsque la seconde lame mobile 3 est dépliée. Dans ce cas, le verrouillage du fermoir est moins aisé puisqu'une fois la première lame mobile 2 repliée sur la lame fixe 1, rien ne maintient ladite première lame mobile 2 dans cette position jusqu'à ce que la seconde lame mobile 3 soit à son tour rabattue sur la lame fixe. Cependant, l'absence de moyens de verrouillage élastiques n'influence pas le déverrouillage d'un fermoir selon cette variante qui est en tout point similaire à celui décrit plus haut. Un fermoir selon cette variante présente donc les mêmes avantages que le fermoir décrit plus haut quant à son déverrouillage.The present embodiment has been described by way of example only. Alternatively, the clasp according to the invention may not include elastic locking means for holding the first movable blade 2 in its folded position on the fixed blade 1 when the second movable blade 3 is unfolded. In this case, locking the clasp is less easy since once the first movable blade 2 folded on the fixed blade 1, nothing maintains said first movable blade 2 in this position until the second movable blade 3 is at his turn folded on the fixed blade. However, the absence of elastic locking means does not influence the unlocking of a clasp according to this variant which is in all respects similar to that described above. A clasp according to this variant therefore has the same advantages as the clasp described above as to its unlocking.

En variante également, les moyens de verrouillage élastiques pourraient comprendre deux billes d'encliquetage situées chacune sur un flanc latéral de la première lame mobile 2 et coopérant avec des encoches respectives présentes sur les flancs intérieurs des longerons 10, 11 de la lame fixe. Les autres composants d'un fermoir selon cette variante, son verrouillage et son déverrouillage sont en tout point similaire à ceux décrits ci-dessus.Alternatively also, the resilient locking means could comprise two detent balls each located on a lateral side of the first movable blade 2 and cooperating with respective notches present on the inner sides of the longitudinal members 10, 11 of the fixed blade. The other components of a clasp according to this variant, its locking and unlocking are in all respects similar to those described above.

En variante encore, le fermoir selon l'invention pourrait ne présenter qu'un seul poussoir 7 monté pivotant sur le support 12. Ledit poussoir unique serait dans cette variante en tout point similaire à un des poussoirs 7, 8 décrit dans la forme d'exécution ci-dessus. Les modifications qu'implique une telle variante pour les autres composants du fermoir, son verrouillage et son déverrouillage apparaîtront clairement à l'homme du métier.In another variant, the clasp according to the invention could have only one pusher 7 pivotally mounted on the support 12. Said single pusher would be in this variant completely similar to one of the pushers 7, 8 described in the form of execution above. The modifications implied by such a variant for the other components of the clasp, its locking and unlocking will be clear to those skilled in the art.

Le fermoir selon l'invention présente de nombreux avantages. Le fermoir étant conformé pour « éjecter » simultanément les deux lames mobiles 2, 3 lorsque l'utilisateur presse simultanément les deux poussoirs 7, 8, le déverrouillage du fermoir s'en trouve grandement facilité et ne se fait qu'en une seule opération pour l'utilisateur : il n'est en effet pas nécessaire de déloger manuellement une des lames mobiles 2, 3. Enfin, le fermoir selon l'invention comprend peu de pièces réduisant ainsi son encombrement et le rendant adapté pour tout type de bracelet. De plus, les pièces qui le composent sont facilement réalisables par un procédé de déformation plastique par exemple facilitant également la miniaturisation du fermoir.The clasp according to the invention has many advantages. The clasp being shaped to "eject" simultaneously the two movable blades 2, 3 when the user simultaneously presses the two pushers 7, 8, the unlocking of the clasp is greatly facilitated and is done in one operation for the user: it is indeed not necessary to dislodge manually one of the movable blades 2, 3. Finally, the clasp according to the invention comprises few parts thus reducing its size and making it suitable for any type of bracelet. In addition, the parts that compose it are easily achievable by a plastic deformation process for example also facilitating the miniaturization of the clasp.

Claims (6)

Fermoir déployant comprenant une lame fixe (1), une première lame dépliante (2) articulée à une première extrémité (10a, 11a) de la lame fixe (1) et une seconde lame dépliante (3) articulée à une seconde extrémité (10b, 11 b) de la lame fixe (1), et au moins un poussoir (7) monté pivotant autour d'un axe de pivotement (70) sur la lame fixe (1) contre l'action d'une force élastique de rappel (71), caractérisé par le fait que - les première et seconde lames dépliantes (2, 3) sont agencées pour qu'une fois repliées sur la lame fixe (1), la seconde lame dépliante (3) recouvre en partie la première lame dépliante (2), de manière à ce que, à partir de leur position repliée sur la lame fixe, tout déploiement de la première lame dépliante (2) entraîne un déploiement de la seconde lame dépliante (3) ; - le poussoir (7) et la seconde lame dépliante (3) sont agencés pour que lorsque la seconde lame dépliante (3) est repliée sur la lame fixe (1), ladite seconde lame dépliante vient en butée contre le poussoir (7) et pour qu'une force exercée sur ladite lame dépliante essentiellement parallèlement à l'axe de pivotement du poussoir (7) et dirigée vers la lame fixe (1) entraîne le pivotement du poussoir (7) d'une première amplitude amenant ledit poussoir dans une première position où la seconde lame dépliante (3) n'est plus en butée contre ledit poussoir (7) et peut être rabattue complètement sur la lame fixe (1) et pour que le poussoir (7) rappelé depuis ladite première position dans sa position initiale de repos par la force élastique de rappel (71) empêche tout mouvement de la seconde lame dépliante (3) par rapport à la lame fixe (1); - le poussoir (7) présente encore des moyens de déverrouillage agencés pour que, lorsque les première et seconde lames dépliantes (2, 3) sont repliées sur la lame fixe, la seconde lame dépliante (3) recouvrant une partie de la première lame dépliante (2) et étant verrouillée par le poussoir (7), un pivotement du poussoir (7) contre l'action de la force élastique (71) d'une seconde amplitude, plus grande que la première amplitude, amène ledit poussoir dans une seconde position dans laquelle le poussoir (7) n'empêche plus le déploiement de la seconde lame dépliante (3) par rapport à la lame fixe (1) et dans laquelle lesdits moyens de déverrouillage coopèrent avec la première lame dépliante (2) pour la soulever et l'écarter de la lame fixe (1) entraînant avec elle la seconde lame dépliante (3) qui est ainsi libérée de l'action de verrouillage du poussoir (7). Deployant clasp comprising a fixed blade (1), a first folding blade (2) articulated at a first end (10a, 11a) of the fixed blade (1) and a second folding blade (3) articulated at a second end (10b, 11 b) of the fixed blade (1), and at least one pusher (7) pivotally mounted about a pivot axis (70) on the fixed blade (1) against the action of an elastic return force ( 71), characterized in that the first and second folding blades (2, 3) are arranged so that when folded on the fixed blade (1), the second folding blade (3) partly covers the first folding blade (2), so that that from their folded position on the fixed blade, any deployment of the first folding blade (2) causes deployment of the second folding blade (3); - The pusher (7) and the second folding blade (3) are arranged so that when the second folding blade (3) is folded over the fixed blade (1), said second leaf blade abuts against the pusher (7) and for a force exerted on said folding blade substantially parallel to the axis of pivoting of the pusher (7) and directed towards the fixed blade (1) causes the pusher (7) to pivot by a first amplitude bringing said pusher into a first position where the second folding blade (3) is no longer in abutment against said pusher (7) and can be folded completely on the fixed blade (1) and for the pusher (7) recalled from said first position in its position initial resting by the elastic return force (71) prevents any movement of the second folding blade (3) relative to the fixed blade (1); - The pusher (7) still has unlocking means arranged so that when the first and second folding blades (2, 3) are folded over the fixed blade, the second folding blade (3) covering a portion of the first folding blade (2) and being locked by the pusher (7), a pivoting of the pusher (7) against the action of the elastic force (71) of a second amplitude, larger than the first amplitude, causes said pusher in a second position in which the pusher (7) no longer prevents the deployment of the second folding blade (3) relative to the fixed blade (1) and wherein said unlocking means cooperate with the first folding blade (2) to lift it and away from the fixed blade (1) driving with it the second folding blade (3) which is thus released from the locking action of the pusher (7). Fermoir selon la revendication 1, caractérisé par le fait qu'il comprend deux poussoirs (7, 8) indépendants et montés pivotants autour d'un axe de pivotement (70, 80) respectif sur la lame fixe (1) contre l'action d'une force élastique de rappel (71, 81) respective et agencés pour verrouiller et déverrouiller le fermoir par un pivotement simultané desdits poussoirs (7, 8).Clasp according to claim 1, characterized in that it comprises two independent pushers (7, 8) pivotally mounted around a respective pivot axis (70, 80) on the fixed blade (1) against the action of an elastic return force (71, 81) respectively and arranged to lock and unlock the clasp by a simultaneous pivoting of said pushers (7, 8). Fermoir selon l'une des revendications précédentes, caractérisé en ce qu'il comporte en outre des moyens de verrouillage élastiques (21, 6, 9) de la première lame dépliante (2) agencés pour maintenir la première lame dépliante (2) en position repliée sur la lame fixe (1), et tels que la coopération des moyens de déverrouillage du poussoir (7) avec la première lame dépliante (2) permet en outre de libérer ladite première lame dépliante desdits moyens de verrouillage élastiques.Clasp according to one of the preceding claims, characterized in that it further comprises resilient locking means (21, 6, 9) of the first folding blade (2) arranged to hold the first folding blade (2) in position folded on the fixed blade (1), and such that the cooperation of the pusher unlocking means (7) with the first folding blade (2) further allows to release said first folding blade of said resilient locking means. Fermoir selon la revendication 3, caractérisé par le fait que les moyens de verrouillage élastiques de la première lame dépliante (2) comprennent au moins une bille d'encliquetage (6) fixée sur ladite première lame dépliante (2) et coopérant avec une portion de la lame fixe (1).Clasp according to claim 3, characterized in that the elastic locking means of the first folding blade (2) comprise at least one latching ball (6) fixed on said first folding blade (2) and cooperating with a portion of the fixed blade (1). Fermoir selon l'une quelconque des revendications précédentes, caractérisé par le fait que la force élastique de rappel du ou des poussoirs (7, 8) est un ressort à flexion du type épingle.Clasp according to any one of the preceding claims, characterized in that the elastic return force of the pushbutton (s) (7, 8) is a bending spring of the pin type. Fermoir selon l'une quelconque des revendications précédentes, caractérisé par le fait que les moyens de verrouillage comprennent au moins un épaulement (31) que présente la seconde lame dépliante (3) et destiné à coopérer avec un flanc arrondi (73) du poussoir (7, 8).Clasp according to any one of the preceding claims, characterized in that the locking means comprise at least one shoulder (31) that has the second folding blade (3) and intended to cooperate with a rounded flank (73) of the pusher ( 7, 8).
EP20120002258 2011-05-19 2012-03-29 Clasp with extensible loop Active EP2524613B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH00850/11A CH704978B1 (en) 2011-05-19 2011-05-19 Folding clasp.

Publications (2)

Publication Number Publication Date
EP2524613A1 true EP2524613A1 (en) 2012-11-21
EP2524613B1 EP2524613B1 (en) 2014-04-09

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EP20120002258 Active EP2524613B1 (en) 2011-05-19 2012-03-29 Clasp with extensible loop

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EP (1) EP2524613B1 (en)
CH (1) CH704978B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140366339A1 (en) * 2013-06-12 2014-12-18 Simon et Membrez S.A. Clasp for piece of jewellery or wristwatch

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5826309A (en) * 1997-09-19 1998-10-27 Tsamas; Anton Jewelry safety clasp
EP1279349A1 (en) 2001-07-23 2003-01-29 Maier S.A.R.L. Fastener having pivotable buttons
WO2004086895A1 (en) * 2003-04-03 2004-10-14 Eberhard Et Co. Sa Clasp for a watchstrap or bracelet
EP1925227A1 (en) * 2006-11-27 2008-05-28 Dexel S.A. Unfolding clasp for bracelets

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5826309A (en) * 1997-09-19 1998-10-27 Tsamas; Anton Jewelry safety clasp
EP1279349A1 (en) 2001-07-23 2003-01-29 Maier S.A.R.L. Fastener having pivotable buttons
WO2004086895A1 (en) * 2003-04-03 2004-10-14 Eberhard Et Co. Sa Clasp for a watchstrap or bracelet
EP1925227A1 (en) * 2006-11-27 2008-05-28 Dexel S.A. Unfolding clasp for bracelets

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140366339A1 (en) * 2013-06-12 2014-12-18 Simon et Membrez S.A. Clasp for piece of jewellery or wristwatch

Also Published As

Publication number Publication date
CH704978A2 (en) 2012-11-30
EP2524613B1 (en) 2014-04-09
CH704978B1 (en) 2015-10-30

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