EP3957206B1 - Timepiece component provided with a cover - Google Patents

Timepiece component provided with a cover Download PDF

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Publication number
EP3957206B1
EP3957206B1 EP20191466.0A EP20191466A EP3957206B1 EP 3957206 B1 EP3957206 B1 EP 3957206B1 EP 20191466 A EP20191466 A EP 20191466A EP 3957206 B1 EP3957206 B1 EP 3957206B1
Authority
EP
European Patent Office
Prior art keywords
cap
timepiece component
assembly
timepiece
configuration
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
EP20191466.0A
Other languages
German (de)
French (fr)
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EP3957206A1 (en
Inventor
Benjamin Celant
Benoît Junod
Jean-Baptiste Robin
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.)
Rolex SA
Original Assignee
Rolex SA
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 Rolex SA filed Critical Rolex SA
Priority to EP20191466.0A priority Critical patent/EP3957206B1/en
Priority to US17/401,540 priority patent/US11638467B2/en
Priority to JP2021132624A priority patent/JP2022034543A/en
Priority to CN202110948489.5A priority patent/CN114073360A/en
Publication of EP3957206A1 publication Critical patent/EP3957206A1/en
Application granted granted Critical
Publication of EP3957206B1 publication Critical patent/EP3957206B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • A44C5/02—Link constructions
    • A44C5/04—Link constructions extensible
    • 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
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B45/00—Time pieces of which the indicating means or cases provoke special effects, e.g. aesthetic effects
    • G04B45/0084—Pictures or inscriptions on the case or parts thereof, attaching complete pictures
    • G04B45/0092—Changeable parts

Definitions

  • the present invention relates to a watch component equipped with at least one cap. It also relates to a timepiece comprising such a timepiece component. It also relates to a process for manufacturing such a watch component.
  • a general object of the invention is to propose a new solution for a watch component equipped with a cap, which improves existing solutions, by best meeting the aforementioned requirements.
  • an object of the invention is to propose a solution for a watch component equipped with a robust, reliable cap, simple to implement, and capable of presenting an attractive aesthetic appearance.
  • the invention is based on a watch component according to claim 1.
  • the invention will be described in the context of a clasp cover. However, it could be integrated alternatively into any other watch component, in particular a trim component such as a caseband, a bracelet link, etc.
  • FIG. 1 represents a clasp for a bracelet according to one embodiment of the invention.
  • This clasp comprises two blades 1, 2 articulated by one of their ends around an axis.
  • the free end of the blade 1 is integral with a first articulation axis used for the articulation of a complementary cover 7, 7c and a second articulation axis used for the articulation of an end of one of the strands of the bracelet.
  • the free end of the blade 2 is integral with a mobile structure 3 articulated in rotation.
  • THE clasp can thus occupy an open position, as represented by the figure 1 , partially deployed, and a closed position in which the second blade 2 and the structure 3 are folded and locked on the first blade 1.
  • the end of a first strand of bracelet is fixed on the second end of the first blade 1 and the end of a second bracelet strand is fixed on the free end of the movable structure 3.
  • the invention relates more specifically to a clasp cover.
  • This cover is mainly integrated into structure 3 of the clasp.
  • the cover comprises a first part 13 which has a vertical cross section in the shape of an inverted U, having an upper face visible to a user, and two side walls, substantially perpendicular to the upper face, intended to laterally cover the entire clasp and of its mechanism, to hide it in the closed position and ensure the aesthetic appearance of the solution.
  • the cover also includes a removable cap 13c. The cover can thus occupy a fixing configuration in which the removable cover 13c is fixed on the first part 13 and a free configuration in which the cover 13c is detached from the first part 13.
  • the clasp comprises a complementary cover 7, 7c arranged on the first blade 1 and intended to fold down in the closing position of the clasp to position itself in the continuity of the cover 13 arranged on the movable structure 3 and cover a lever of locking 12, and form a single clasp cover including security.
  • This complementary cover part has a structure similar to that described above, that is to say a first part 7 cooperating with a removable cover 7c. It can be assembled according to the same concept as the invention or not. It will not be described in more detail below.
  • the upper surface of the first part 13 of the cover has a planar orthogonal projection of substantially rectangular shape.
  • the cap 13c is presented as a substantially planar and elongated element which extends over the entire length of the upper surface of the cover and over a portion of the width of the upper surface of the cover, for example between 20% and 100%, or even between 30% and 90%, or even between 45% and 55%. It is centered or not on the lid.
  • the cap 13c is arranged in a recessed portion of the first part 13, in the thickness of the upper surface of the first part of the cover, so that it covers this second recessed portion and occupies the volume released by this recessed portion.
  • the upper surface of the cap is continuous with the upper surface of the first part, forming a generally continuous upper surface of the cover.
  • the upper surface of the cap is recessed or protrudes from the upper surface of the first part.
  • the figure 2 And 3 represent a first variant of the cover according to the embodiment. These figures make it possible to visualize the device for fixing the cap 13c on the first part 13 of the cover.
  • the cap 13c comprises at least a first assembly member 40 and a second assembly member 41, which are arranged at the two opposite distal ends, on the side of the surface of the cap 13c intended for orientation towards the first part 13 of the cover, called lower surface according to the chosen convention.
  • the first part 13 of the cover comprises at least a first hooking member 50 and a second hooking member 51.
  • the first assembly member 40 of the cap 13c cooperates with the first attachment member 50 of the first part 13 and the second assembly member 41 of the cap 13c cooperates with the second attachment member 51 of the first part 13.
  • the hooking members 50, 51 of the first part 13 and the assembly members 40, 41 of the cap 13c are engaged.
  • This attachment arrangement is designed to guarantee the reliable maintenance of the cap 13c, in its rest position, on the first part 13 of the cover.
  • the cap 13c is elastically deformable from a rest position to a deformed position, so that the deformed position of the cap 13c is suitable for its positioning and its removal from the first part 13 for the passage of the configuration fixing towards the free configuration of the cover and vice versa, and so that its rest position allows the stable maintenance of the fixing configuration of the cover.
  • the cap 13c is separated from the first part 13 by a cavity which allows the deformation of the cap 13c from its rest position to its deformed position by simple pressure on the upper surface of the cap 13c , in the vertical direction illustrated by the arrow P. By this pressure, the cap 13c deforms and reduces all or part of the volume of the cavity. The two ends of the cap 13c thus deviate from each other by a distance ⁇ d.
  • the cavity therefore frees a space of height ⁇ L between the upper surface of the first part 13 and the lower surface facing the cap 13c, this height being considered along the vertical axis z.
  • This cavity has a volume such that the first part 13 forms a stop limiting the maximum deformation of the cap 13c below its elastic limit when it is deformed until it comes into contact with the first part 13 by pressure. mentioned above.
  • the height ⁇ L of the cavity thus represents a deformation and assembly stroke of the cap 13c.
  • the cap 13c is such that its mechanical deformation properties allow it to lengthen in its deformed position, by modifying its natural curvature in the rest position, which allows its assembly members 40, 41 to move apart a distance ⁇ d and to escape their grip with the hooking members 50, 51.
  • the cover 13c can thus be removed from the first part 13 of the cover.
  • the cap 13c therefore has a curvature along a rest radius of curvature in the rest position, and has a curvature along an increased radius of curvature in the deformed position.
  • the mechanical deformation properties of the cap 13c are defined by several parameters, in particular its geometry and more particularly its thickness, and the material composing it. These parameters are chosen to reach a compromise in the definition of the pressure force.
  • the latter is intended to deform the cap 13c to its deformed position, without being too large to allow the release of said cap without difficulty, in particular manually, without tools. This force is also sufficient to prevent accidental release.
  • the cap 13c is presented as a one-piece element. It can for example be made of metal or a material which has mechanical properties of resistance to shocks and scratches. and/or is likely to present a very attractive aesthetic appearance, for example a ceramic, a cermet, a glass, a sapphire, a mother-of-pearl, amber or a natural or reconstituted stone.
  • the first part 13 of the cover is made of a metal alloy, for example stainless steel, gold, platinum, bronze or titanium.
  • the two assembly members 40, 41 of the cap have a hook-shaped section forming notches cooperating with complementary shapes of the hooking members 50, 51 of the first part 13.
  • the deformed position of the cap 13c does not allow the release of the cap 13c from the first part 13 of the cover, the elongation ⁇ d not being sufficient. More precisely, release by simple unclipping of the cap 13c is not possible.
  • a modification of the temperature of the cap 13c and/or of the first part 13 makes it possible to obtain an additional relative spacing ⁇ dt between the assembly elements thanks to thermal expansion/contraction.
  • the deformed position of the cap 13c under the combined effect of the applied pressure and the thermal expansion of the cap 13c implies a total deformation ⁇ d + ⁇ dt which thus allows separation of the cap 13c and the first part 13 of the watch component, according to the principle described previously in the context of the first alternative embodiment.
  • the thermal expansion contribution makes it possible to modify the connection between the cap 13c and the first one part 13, so that the deformed position of the cap 13c allows its release, whereas it does not allow its release at room temperature.
  • the applied thermal expansion thus makes it possible to increase the range of movement between the cap and the first part of the cover.
  • This embodiment therefore offers additional safety relative to the first alternative embodiment, avoiding accidental release of the cap at room temperature.
  • the rest position of the cap 13c does not allow its release. The combined action of thermal expansion and mechanical deformation is therefore necessary to allow the assembly and release of the cap 13c.
  • the assembly temperature of the cap 13c and/or the first part 13 is such that it requires a temperature difference between the cap 13c and the first part 13 greater than or equal to 80 degrees C, or even greater than or equal to at 100 degrees C, or even greater than or equal to 200 degrees C, or even greater than or equal to 300 degrees C, or even greater than or equal to 400 degrees C, or even greater than or equal to 500 degrees C.
  • the temperatures and/or temperature ramps are selected to obtain sufficient expansion or contraction, without fundamentally modifying the structure of the material on which we act and by controlling possible thermal shocks.
  • the dimensioning of the assembled elements is carried out taking into account the elongation obtained by elastic deformation, the elongation or shrinkage obtained by thermal expansion/contraction, and the tolerances of the machining and/or sintering dimensions and/or rectification of the cap.
  • the total elongation obtained is the sum of the elongation obtained by elastic deformation ⁇ d and the elongation obtained by thermal deformation ⁇ dt, and it is designed to be greater than the sum of the tolerances of the assembly dimensions between the cap and the first part of the cover.
  • thermal expansion makes it possible to size the corresponding assembly and attachment members so as to allow assembly by heating the cap while preventing disassembly at room temperature.
  • THE figures 4 And 5 thus represent, according to a first example of the second alternative embodiment, a cap 13c assembled on a first part 13 via hooking and assembly members of geometry different from the realization of the figure 2 And 3 .
  • the first part 13 comprises an upper surface comprising a central recessed part between two side surfaces 54 extending longitudinally. These two lateral surfaces 54 are connected together by two transverse beams 53 arranged near the two longitudinal ends of the first part 13. The two lateral surfaces extend slightly beyond these transverse beams 53 at the level of the ends of the first part 13, forming side stretchers 54.
  • the cap 13c comprises two transverse recesses 43 at the level of its lower surface, adapted to collaborate with the two transverse beams 53 of the first part 13.
  • the first part 13 is made of 904L stainless steel with an initial length of 21 mm with a distance between the transverse beams 53 of 16 mm, at room temperature. It is heated to the assembly temperature of 400°C, which makes it possible to obtain an additional elongation between the transverse beams 53 of 0.11 mm. Cap 13c is kept at room temperature.
  • the cap 13c is thus positioned on the first preheated part 13, then elastically deformed as mentioned previously, to allow it to be clipped onto the first part, by cooperation of its assembly members formed by the two transverse recesses 43 on the corresponding attachment members of the first part formed by the two transverse beams 53.
  • the sides 43a of the transverse recesses 43 of the cap 13c come to rest on the sides 53a of the transverse beams 53 of the first part 13 , ensuring that the cap 13c is held in place on the first part 13.
  • the transverse beams 53 are spaced apart from each other by the expansion of the first part 13, so as to allow the cap 13c to be removed in its position deformed by applying pressure to the center of the cap.
  • the cap is stored at room temperature or cooled.
  • the plate is ground and a retaining undercut is arranged on the first part 13 and/or on the cap 13c.
  • the sides 43a of the transverse recesses 43 and/or the sides 53a of the transverse beams 53 comprise latching means for latching the edges of the cap 13c with the first part 13.
  • latching means can for example be presented in the form of a dovetail, or a tongue and groove, or one or more lug(s) with corresponding recesses, etc.
  • the cap 13c further comprises a lateral groove adapted to also snap the edges of the cap 13c with the first part 13.
  • THE figures 6 And 7 represent a second exemplary embodiment according to the second alternative embodiment, for which a cap 13c is assembled on a first part 13 via hooking and assembly members of geometry different from previous embodiments.
  • the first part 13 comprises an upper surface comprising a recessed central portion, forming a housing for a cap 13c, of manner similar to the achievement visible on the figure 1 .
  • the hooking and assembly members are arranged transversely, and not longitudinally.
  • hooking members 50, 50' are arranged in the lateral vertical flanks 134, 135 bordering the recessed central portion of the first part 13, in the form of snap-fastening elements.
  • the cap 13c comprises corresponding assembly members, arranged in the form of snap-fastening elements 40, 40' arranged on its lateral side.
  • latching elements can for example take the form of lugs associated with a recess or a groove. They are sized according to the constituent material in order to withstand the stresses suffered by the clasp.
  • the first part 13 can be made of 21 mm 904L stainless steel and be heated to an assembly temperature of 400°C, which induces a lateral expansion of 0.06 mm.
  • the first part 13 is elastically deformed in order to separate the first and second walls and allow the positioning of the cap 13c, so as to correspond the hooking members 50, 50' of the first part with the assembly members 40 , 40' from the cap.
  • the whole thing is then cooled.
  • the hooking members 50, 50' of the first part and the assembly members 40, 40' of the cover are interlocked, ensuring that the cover 13c is held on the cover, even in the event of deformation.
  • By specifically heating the first part 13 again to the assembly temperature it is possible to remove the cap 13c.
  • This example illustrates that the invention can be implemented on the basis of a second elastically deformable part, instead of the cap in the other embodiments described.
  • the cap 13c could further comprise two flanges at its longitudinal distal ends, arranged to cover the distal ends of the upper surface of the first part 13.
  • these flanges would be held on the cover by clipping, as described previously in the context of the first embodiment. More generally, the preceding embodiments can naturally be combined.
  • the concept can be implemented with any cap and first part presenting a difference in thermal expansion behavior between them.
  • any other number of attachment members of the first part and assembly members of the cap is possible.
  • These organs can also be presented in another form, and at a different positioning.
  • these members can be in the form of a hook and/or a notch and/or a recess and/or a groove and/or a lug and/or a beam .
  • the cap could take any other shape, and any other positioning on the first part, not necessarily centered. It may present itself in another geometry, inducing its possible deformation by pressure in a direction other than the vertical direction described. as mentioned above, the first part could present a geometry allowing its elastic deformation.
  • the invention applies to any embodiment involving elastic deformation of the cap and/or the first part.
  • the invention has been described in the context of a clasp cover. However, as mentioned previously, the same concept can be integrated into any other watch exterior component, for example a middle part or a bracelet link.
  • the invention also relates to a bracelet, characterized in that it comprises a clasp cover as described above or a clasp as described above.
  • the invention also relates to a wristwatch comprising such a bracelet or more generally at least one watch component as described above.
  • the invention also relates to a method of manufacturing a watch component, characterized in that it comprises a step of fixing a cap 13c on a first part 13 of the watch component by elastically deforming the cap 13c from a position rest to a deformed position and/or by elastically deforming the first part 13 from a rest position to a deformed position.
  • This process may include a preliminary step of heating and/or cooling at least the cap 13c and/or the first part 13, up to an assembly temperature.
  • the step of fixing the cap 13c on the first part 13 may comprise a sub-step of positioning the cap 13c on the first part 13 then a sub-step of applying a vertical force substantially to the center of the cap 13c to deform it from a rest position to a deformed position in which assembly members of the cap 13c are able to come into cooperation with attachment members of the first part 13.

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  • General Physics & Mathematics (AREA)
  • Adornments (AREA)
  • Electromechanical Clocks (AREA)
  • Connection Of Plates (AREA)

Description

IntroductionIntroduction

La présente invention concerne un composant horloger équipé d'au moins une coiffe. Elle porte aussi sur une pièce d'horlogerie comprenant un tel composant horloger. Elle porte aussi sur un procédé de fabrication d'un tel composant horloger.The present invention relates to a watch component equipped with at least one cap. It also relates to a timepiece comprising such a timepiece component. It also relates to a process for manufacturing such a watch component.

Etat de l'ArtState of the art

Pour renforcer la résistance aux rayures et/ou modifier l'aspect d'un composant horloger, notamment d'un composant d'habillage comme un fermoir de bracelet, une maille de bracelet ou une carrure, il est connu de fixer une coiffe sur une partie vulnérable et/ou apparente dudit composant horloger. Une telle coiffe idéale devrait répondre aux exigences suivantes :

  • Elle doit permettre un assemblage simple et sans risque de dégradation avec un composant horloger ;
  • Elle doit être robuste pour résister aux contraintes externes comme les chocs et les rayures ;
  • Elle doit être fixée de manière fiable pour éviter tout désassemblage involontaire ;
  • Elle doit présenter un aspect esthétique attractif.
To reinforce scratch resistance and/or modify the appearance of a watch component, in particular a covering component such as a bracelet clasp, a bracelet link or a middle part, it is known to attach a cap to a vulnerable and/or visible part of said watch component. Such an ideal headdress should meet the following requirements:
  • It must allow simple assembly without risk of damage with a watch component;
  • It must be robust to withstand external stresses such as shocks and scratches;
  • It must be fixed reliably to avoid unintentional disassembly;
  • It must have an attractive aesthetic appearance.

En fonction de la nature, notamment de la matière de la coiffe et du composant, les solutions existantes telles que le brasage répondent de manière insatisfaisante à l'ensemble de ces exigences. Ainsi, un objet général de l'invention est de proposer une nouvelle solution de composant horloger équipé d'une coiffe, qui améliore les solutions existantes, en répondant au mieux aux exigences susmentionnées.Depending on the nature, in particular the material of the cap and the component, existing solutions such as brazing respond unsatisfactorily to all of these requirements. Thus, a general object of the invention is to propose a new solution for a watch component equipped with a cap, which improves existing solutions, by best meeting the aforementioned requirements.

Plus précisément, un objet de l'invention est de proposer une solution de composant horloger équipé d'une coiffe robuste, fiable, simple à mettre en oeuvre, et pouvant présenter un aspect esthétique attractif.More precisely, an object of the invention is to propose a solution for a watch component equipped with a robust, reliable cap, simple to implement, and capable of presenting an attractive aesthetic appearance.

Le document US3609962A divulgue un fermoir pour bracelet de montre.The document US3609962A discloses a clasp for a watch strap.

Brève description de l'inventionBrief description of the invention

A cet effet, l'invention repose sur un composant horloger selon la revendication 1.To this end, the invention is based on a watch component according to claim 1.

L'invention est précisément définie par les revendications.The invention is precisely defined by the claims.

Brève description des figuresBrief description of the figures

Ces objets, caractéristiques et avantages de la présente invention seront exposés en détail dans la description suivante d'un mode de réalisation particulier fait à titre non-limitatif en relation avec les figures jointes parmi lesquelles :

  • La figure 1 représente une vue en perspective d'un fermoir ouvert comprenant un couvercle équipé d'une coiffe selon un mode de réalisation de l'invention.
  • La figure 2 représente une vue éclatée en perspective de dessus du couvercle du fermoir selon une première variante du mode de réalisation de l'invention.
  • La figure 3 représente une vue en coupe par un plan longitudinal vertical médian du couvercle du fermoir comprenant une coiffe en configuration de fixation selon la première variante du mode de réalisation de l'invention.
  • La figure 4 représente une vue en coupe par un plan longitudinal vertical médian du couvercle du fermoir comprenant une coiffe en configuration de fixation selon un premier exemple d'une deuxième variante du mode de réalisation de l'invention.
  • La figure 5 représente une vue en perspective de dessous du couvercle du fermoir comprenant une coiffe en configuration de fixation selon le premier exemple de la deuxième variante du mode de réalisation de l'invention.
  • La figure 6 représente une vue transversale du couvercle du fermoir comprenant une coiffe en configuration de fixation selon un deuxième exemple de la deuxième variante du mode de réalisation de l'invention.
  • La figure 7 représente une vue éclatée en perspective de dessus du couvercle du fermoir selon le deuxième exemple de la deuxième variante du mode de réalisation de l'invention.
These objects, characteristics and advantages of the present invention will be explained in detail in the following description of an embodiment. particular made on a non-limiting basis in relation to the attached figures including:
  • There figure 1 represents a perspective view of an open clasp comprising a cover equipped with a cap according to one embodiment of the invention.
  • There figure 2 represents an exploded perspective view from above of the cover of the clasp according to a first variant of the embodiment of the invention.
  • There Figure 3 represents a sectional view through a median vertical longitudinal plane of the cover of the clasp comprising a cap in fixing configuration according to the first variant of the embodiment of the invention.
  • There figure 4 represents a sectional view through a median vertical longitudinal plane of the cover of the clasp comprising a cap in fixing configuration according to a first example of a second variant of the embodiment of the invention.
  • There figure 5 represents a perspective view from below of the cover of the clasp comprising a cap in fixing configuration according to the first example of the second variant of the embodiment of the invention.
  • There Figure 6 represents a transverse view of the cover of the clasp comprising a cap in fixing configuration according to a second example of the second variant of the embodiment of the invention.
  • There Figure 7 represents an exploded perspective view from above of the cover of the clasp according to the second example of the second variant of the embodiment of the invention.

L'invention va être décrite dans le cadre d'un couvercle de fermoir. Toutefois, elle pourrait être intégrée de manière alternative dans tout autre composant horloger, notamment un composant d'habillage comme une carrure, une maille de bracelet, etc.The invention will be described in the context of a clasp cover. However, it could be integrated alternatively into any other watch component, in particular a trim component such as a caseband, a bracelet link, etc.

Pour simplifier la description du mode de réalisation, nous utiliserons par convention les termes de « direction longitudinale » pour la direction selon la longueur d'un fermoir ou d'un brin de bracelet, et de « direction transversale » pour la direction perpendiculaire à la longueur d'un fermoir ou d'un brin de bracelet, dans le plan d'un fermoir (plus précisément le plan d'une lame ou d'un couvercle du fermoir), en considérant particulièrement la configuration fermée du fermoir. La direction verticale est la direction perpendiculaire aux deux premières directions, orientée perpendiculairement au plan du fermoir (plus précisément d'une lame ou d'un couvercle du fermoir). Les adjectifs « supérieur » et « inférieur » seront utilisés relativement à cette direction verticale. Par extension, ces directions et définitions s'appliqueront à un couvercle de fermoir en considérant la position qu'il aurait au sein d'un fermoir.To simplify the description of the embodiment, we will conventionally use the terms "longitudinal direction" for the direction along the length of a clasp or a strand of bracelet, and "transverse direction" for the direction perpendicular to the length of a clasp or bracelet strand, in the plane of a clasp (more precisely the plane of a blade or cover of the clasp), particularly considering the closed configuration of the clasp. The vertical direction is the direction perpendicular to the first two directions, oriented perpendicular to the plane of the clasp (more precisely of a blade or cover of the clasp). The adjectives “upper” and “lower” will be used in relation to this vertical direction. By extension, these directions and definitions will apply to a clasp cover considering the position it would have within a clasp.

De plus, pour faciliter la compréhension, les mêmes références seront utilisées pour les différentes variantes de réalisation pour désigner des éléments identiques ou semblables.In addition, to facilitate understanding, the same references will be used for the different embodiments to designate identical or similar elements.

La figure 1 représente un fermoir pour bracelet selon un mode de réalisation de l'invention. Ce fermoir comprend deux lames 1, 2 articulées par une de leurs extrémités autour d'un axe. L'extrémité libre de la lame 1 est solidaire d'un premier axe d'articulation servant à l'articulation d'un couvercle complémentaire 7, 7c et d'un deuxième axe d'articulation servant à l'articulation d'une extrémité d'un des brins du bracelet. L'extrémité libre de la lame 2 est solidaire d'une structure 3 mobile articulée en rotation. Le fermoir peut ainsi occuper une position ouverte, comme représenté par la figure 1, de manière partiellement déployée, et une position fermée dans laquelle la deuxième lame 2 et la structure 3 sont repliées et verrouillées sur la première lame 1. L'extrémité d'un premier brin de bracelet est fixée sur la deuxième extrémité de la première lame 1 et l'extrémité d'un deuxième brin de bracelet est fixée sur l'extrémité libre de la structure 3 mobile.There figure 1 represents a clasp for a bracelet according to one embodiment of the invention. This clasp comprises two blades 1, 2 articulated by one of their ends around an axis. The free end of the blade 1 is integral with a first articulation axis used for the articulation of a complementary cover 7, 7c and a second articulation axis used for the articulation of an end of one of the strands of the bracelet. The free end of the blade 2 is integral with a mobile structure 3 articulated in rotation. THE clasp can thus occupy an open position, as represented by the figure 1 , partially deployed, and a closed position in which the second blade 2 and the structure 3 are folded and locked on the first blade 1. The end of a first strand of bracelet is fixed on the second end of the first blade 1 and the end of a second bracelet strand is fixed on the free end of the movable structure 3.

L'invention porte plus précisément sur un couvercle de fermoir. Ce couvercle est principalement intégré dans la structure 3 du fermoir. Le couvercle comprend une première partie 13 qui présente une section transversale verticale en forme de U inversé, présentant une face supérieure visible par un utilisateur, et deux parois latérales, sensiblement perpendiculaires à la face supérieure, destinées à recouvrir latéralement l'ensemble du fermoir et de son mécanisme, pour le dissimuler en position fermée et assurer l'aspect esthétique de la solution. Le couvercle comprend de plus une coiffe 13c amovible. Le couvercle peut ainsi occuper une configuration de fixation dans laquelle la coiffe 13c amovible est fixée sur la première partie 13 et une configuration libre dans laquelle la coiffe 13c est désolidarisée de la première partie 13.The invention relates more specifically to a clasp cover. This cover is mainly integrated into structure 3 of the clasp. The cover comprises a first part 13 which has a vertical cross section in the shape of an inverted U, having an upper face visible to a user, and two side walls, substantially perpendicular to the upper face, intended to laterally cover the entire clasp and of its mechanism, to hide it in the closed position and ensure the aesthetic appearance of the solution. The cover also includes a removable cap 13c. The cover can thus occupy a fixing configuration in which the removable cover 13c is fixed on the first part 13 and a free configuration in which the cover 13c is detached from the first part 13.

En complément, le fermoir comprend un couvercle complémentaire 7, 7c agencé sur la première lame 1 et destiné à venir se rabattre en position de fermeture du fermoir pour se positionner dans la continuité du couvercle 13 agencé sur la structure 3 mobile et recouvrir un levier de verrouillage 12, et former un unique couvercle du fermoir incluant une sécurité. Cette partie complémentaire de couvercle présente une structure similaire à celle décrite ci-dessus, c'est-à-dire une première partie 7 coopérant avec une coiffe 7c amovible. Elle peut être assemblée selon le même concept que l'invention ou non. Elle ne sera pas décrite plus en détail par la suite.In addition, the clasp comprises a complementary cover 7, 7c arranged on the first blade 1 and intended to fold down in the closing position of the clasp to position itself in the continuity of the cover 13 arranged on the movable structure 3 and cover a lever of locking 12, and form a single clasp cover including security. This complementary cover part has a structure similar to that described above, that is to say a first part 7 cooperating with a removable cover 7c. It can be assembled according to the same concept as the invention or not. It will not be described in more detail below.

La surface supérieure de la première partie 13 du couvercle présente une projection orthogonale plane de forme sensiblement rectangulaire. La coiffe 13c se présente comme un élément sensiblement plan et allongé qui s'étend sur toute la longueur de la surface supérieure du couvercle et sur une portion de la largeur de la surface supérieure du couvercle, par exemple entre 20% et 100%, voire entre 30% et 90%, voire entre 45% et 55%. Elle est centrée ou non sur le couvercle. En configuration de fixation, la coiffe 13c est agencée dans une portion en retrait de la première partie 13, dans l'épaisseur de la surface supérieure de la première partie du couvercle, de sorte qu'elle recouvre cette deuxième portion en retrait et occupe le volume libéré par cette portion en retrait. Par exemple, la surface supérieure de la coiffe vient en continuité de la surface supérieure de la première partie, formant une surface supérieure globalement continue du couvercle. Alternativement, la surface supérieure de la coiffe est en retrait ou dépasse de la surface supérieure de la première partie.The upper surface of the first part 13 of the cover has a planar orthogonal projection of substantially rectangular shape. The cap 13c is presented as a substantially planar and elongated element which extends over the entire length of the upper surface of the cover and over a portion of the width of the upper surface of the cover, for example between 20% and 100%, or even between 30% and 90%, or even between 45% and 55%. It is centered or not on the lid. In fixing configuration, the cap 13c is arranged in a recessed portion of the first part 13, in the thickness of the upper surface of the first part of the cover, so that it covers this second recessed portion and occupies the volume released by this recessed portion. For example, the upper surface of the cap is continuous with the upper surface of the first part, forming a generally continuous upper surface of the cover. Alternatively, the upper surface of the cap is recessed or protrudes from the upper surface of the first part.

Les figures 2 et 3 représentent une première variante du couvercle selon le mode de réalisation. Ces figures permettent de visualiser le dispositif de fixation de la coiffe 13c sur la première partie 13 de couvercle. La coiffe 13c comprend au moins un premier organe d'assemblage 40 et un deuxième organe d'assemblage 41, qui sont agencés aux deux extrémités distales opposées, du côté de la surface de la coiffe 13c destinée à une orientation vers la première partie 13 du couvercle, dénommée surface inférieure selon la convention choisie. En complément, la première partie 13 du couvercle comprend au moins un premier organe d'accrochage 50 et un deuxième organe d'accrochage 51. En configuration de fixation, représentée par la figure 3, le premier organe d'assemblage 40 de la coiffe 13c coopère avec le premier organe d'accrochage 50 de la première partie 13 et le deuxième organe d'assemblage 41 de la coiffe 13c coopère avec le deuxième organe d'accrochage 51 de la première partie 13. Ainsi, dans la configuration de fixation du couvercle, les organes d'accrochage 50, 51 de la première partie 13 et les organes d'assemblage 40, 41 de la coiffe 13c sont en prise. Cet agencement d'accrochage est conçu pour garantir le maintien fiable de la coiffe 13c, dans sa position de repos, sur la première partie 13 du couvercle.THE figure 2 And 3 represent a first variant of the cover according to the embodiment. These figures make it possible to visualize the device for fixing the cap 13c on the first part 13 of the cover. The cap 13c comprises at least a first assembly member 40 and a second assembly member 41, which are arranged at the two opposite distal ends, on the side of the surface of the cap 13c intended for orientation towards the first part 13 of the cover, called lower surface according to the chosen convention. In addition, the first part 13 of the cover comprises at least a first hooking member 50 and a second hooking member 51. In fixing configuration, represented by the Figure 3 , the first assembly member 40 of the cap 13c cooperates with the first attachment member 50 of the first part 13 and the second assembly member 41 of the cap 13c cooperates with the second attachment member 51 of the first part 13. Thus, in the cover fixing configuration, the hooking members 50, 51 of the first part 13 and the assembly members 40, 41 of the cap 13c are engaged. This attachment arrangement is designed to guarantee the reliable maintenance of the cap 13c, in its rest position, on the first part 13 of the cover.

Selon l'invention, la coiffe 13c est élastiquement déformable depuis une position de repos vers une position déformée, de sorte que la position déformée de la coiffe 13c est apte à son positionnement et son retrait de la première partie 13 pour le passage de la configuration de fixation vers la configuration libre du couvercle et inversement, et de sorte que sa position de repos permet le maintien stable de la configuration de fixation du couvercle.According to the invention, the cap 13c is elastically deformable from a rest position to a deformed position, so that the deformed position of the cap 13c is suitable for its positioning and its removal from the first part 13 for the passage of the configuration fixing towards the free configuration of the cover and vice versa, and so that its rest position allows the stable maintenance of the fixing configuration of the cover.

Comme cela est illustré sur la figure 3, en configuration de fixation du couvercle, la coiffe 13c est séparée de la première partie 13 par une cavité qui permet la déformation de la coiffe 13c de sa position de repos vers sa position déformée par une simple pression sur la surface supérieure de la coiffe 13c, selon la direction verticale illustrée par la flèche P. Par cette pression, la coiffe 13c se déforme et vient réduire tout ou partie du volume de la cavité. Les deux extrémités de la coiffe 13c s'écartent ainsi l'une de l'autre d'une distance Δd.As illustrated in the Figure 3 , in the lid fixing configuration, the cap 13c is separated from the first part 13 by a cavity which allows the deformation of the cap 13c from its rest position to its deformed position by simple pressure on the upper surface of the cap 13c , in the vertical direction illustrated by the arrow P. By this pressure, the cap 13c deforms and reduces all or part of the volume of the cavity. The two ends of the cap 13c thus deviate from each other by a distance Δd.

La cavité libère donc un espace de hauteur ΔL entre la surface supérieure de la première partie 13 et la surface inférieure en vis-à-vis de la coiffe 13c, cette hauteur étant considérée selon l'axe vertical z. Cette cavité présente un volume tel que la première partie 13 forme une butée limitant la déformation maximale de la coiffe 13c en-dessous de sa limite d'élasticité lorsqu'elle est déformée jusqu'à venir en contact sur la première partie 13 par la pression susmentionnée. La hauteur ΔL de la cavité représente ainsi une course de déformation et de montage de la coiffe 13c.The cavity therefore frees a space of height ΔL between the upper surface of the first part 13 and the lower surface facing the cap 13c, this height being considered along the vertical axis z. This cavity has a volume such that the first part 13 forms a stop limiting the maximum deformation of the cap 13c below its elastic limit when it is deformed until it comes into contact with the first part 13 by pressure. mentioned above. The height ΔL of the cavity thus represents a deformation and assembly stroke of the cap 13c.

La coiffe 13c est telle que ses propriétés mécaniques de déformation lui permettent de s'allonger dans sa position déformée, par la modification de sa courbure naturelle en position de repos, ce qui permet à ses organes d'assemblage 40, 41 de s'écarter d'une distance Δd et d'échapper à leur emprise avec les organes d'accrochage 50, 51. La coiffe 13c peut ainsi être retirée de la première partie 13 du couvercle. En remarque, selon le mode de réalisation, la coiffe 13c présente donc une courbure selon un rayon de courbure de repos en position de repos, et présente une courbure selon un rayon de courbure augmenté en position déformée.The cap 13c is such that its mechanical deformation properties allow it to lengthen in its deformed position, by modifying its natural curvature in the rest position, which allows its assembly members 40, 41 to move apart a distance Δd and to escape their grip with the hooking members 50, 51. The cover 13c can thus be removed from the first part 13 of the cover. As a note, according to the embodiment, the cap 13c therefore has a curvature along a rest radius of curvature in the rest position, and has a curvature along an increased radius of curvature in the deformed position.

En remarque, les propriétés mécaniques de déformation de la coiffe 13c sont définies par plusieurs paramètres, notamment sa géométrie et plus particulièrement son épaisseur, et le matériau la composant. Ces paramètres sont choisis pour atteindre un compromis dans la définition de la force de pression. Avantageusement, cette dernière est prévue pour déformer la coiffe 13c jusqu'à sa position déformée, sans pour autant être trop importante pour permettre la libération de ladite coiffe sans difficulté, notamment manuellement, sans outil. Cette force est par ailleurs suffisante pour éviter une libération accidentelle.As a note, the mechanical deformation properties of the cap 13c are defined by several parameters, in particular its geometry and more particularly its thickness, and the material composing it. These parameters are chosen to reach a compromise in the definition of the pressure force. Advantageously, the latter is intended to deform the cap 13c to its deformed position, without being too large to allow the release of said cap without difficulty, in particular manually, without tools. This force is also sufficient to prevent accidental release.

A titre d'exemple, pour une coiffe 13c se présentant selon la géométrie représentée par les figures 2 et 3, d'une longueur de 21 mm et d'épaisseur 0.7 mm dans la zone centrale de la coiffe, en zircone yttriée brute de frittage, assemblée avec une course de montage ΔL de 0.24 mm, on obtient un allongement de 0.13 mm lors de l'application d'une force permettant la mise en contact de l'intérieur de la coiffe 13c avec la surface supérieure de la première partie 13.By way of example, for a cap 13c presented according to the geometry represented by the figure 2 And 3 , with a length of 21 mm and a thickness of 0.7 mm in the central zone of the cap, in raw sintered yttriated zirconia, assembled with an assembly stroke ΔL of 0.24 mm, an elongation of 0.13 mm is obtained when l application of a force allowing the interior of the cap 13c to be brought into contact with the upper surface of the first part 13.

Avantageusement, la coiffe 13c se présente comme un élément monobloc. Elle peut par exemple se présenter en métal ou dans un matériau qui possède des propriétés mécaniques de résistance aux chocs et aux rayures et/ou est susceptible de présenter un aspect esthétique très attractif, par exemple une céramique, un cermet, un verre, un saphir, une nacre, de l'ambre ou une pierre naturelle ou reconstituée.Advantageously, the cap 13c is presented as a one-piece element. It can for example be made of metal or a material which has mechanical properties of resistance to shocks and scratches. and/or is likely to present a very attractive aesthetic appearance, for example a ceramic, a cermet, a glass, a sapphire, a mother-of-pearl, amber or a natural or reconstituted stone.

De préférence, la première partie 13 du couvercle se présente en alliage métallique, par exemple en acier inoxydable, en or, en platine, en bronze ou en titane.Preferably, the first part 13 of the cover is made of a metal alloy, for example stainless steel, gold, platinum, bronze or titanium.

Dans ce mode de réalisation, les deux organes d'assemblage 40, 41 de la coiffe présentent une section en forme de crochet formant des encoches coopérant avec des formes complémentaires des organes d'accrochage 50, 51 de la première partie 13.In this embodiment, the two assembly members 40, 41 of the cap have a hook-shaped section forming notches cooperating with complementary shapes of the hooking members 50, 51 of the first part 13.

À température ambiante, la position déformée de la coiffe 13c ne permet pas la libération de la coiffe 13c de la première partie 13 du couvercle, l'allongement Δd n'étant pas suffisant. Plus précisément, la libération par simple déclipsage de la coiffe 13c n'est pas possible. Une modification de température de la coiffe 13c et/ou de la première partie 13 permet d'obtenir un écartement supplémentaire relatif Δdt entre les éléments d'assemblage grâce à la dilatation/contraction thermique. A cette température d'assemblage, éloignée de la température ambiante, la position déformée de la coiffe 13c sous l'effet combiné de la pression appliquée et de la dilatation thermique de la coiffe 13c implique une déformation totale Δd + Δdt qui permet ainsi la séparation de la coiffe 13c et de la première partie 13 du composant horloger, selon le principe décrit précédemment dans le cadre de la première variante de réalisation.At room temperature, the deformed position of the cap 13c does not allow the release of the cap 13c from the first part 13 of the cover, the elongation Δd not being sufficient. More precisely, release by simple unclipping of the cap 13c is not possible. A modification of the temperature of the cap 13c and/or of the first part 13 makes it possible to obtain an additional relative spacing Δdt between the assembly elements thanks to thermal expansion/contraction. At this assembly temperature, far from ambient temperature, the deformed position of the cap 13c under the combined effect of the applied pressure and the thermal expansion of the cap 13c implies a total deformation Δd + Δdt which thus allows separation of the cap 13c and the first part 13 of the watch component, according to the principle described previously in the context of the first alternative embodiment.

En effet, en appliquant une augmentation ou une réduction de la température de la coiffe 13c et/ou de la première partie 13 à une valeur prédéfinie de température d'assemblage, la contribution thermique de dilatation permet de modifier la liaison entre la coiffe 13c et la première partie 13, de sorte que la position déformée de la coiffe 13c permet sa libération, alors qu'elle ne permet pas sa libération à température ambiante. La dilatation thermique appliquée permet ainsi d'augmenter la plage de déplacement entre la coiffe et la première partie du couvercle. Cette réalisation offre donc une sécurité supplémentaire relativement à la première variante de réalisation, évitant une libération accidentelle de la coiffe à température ambiante. En remarque complémentaire, à la température d'assemblage, la position de repos de la coiffe 13c ne permet pas sa libération. Il faut donc l'action combinée de la dilatation thermique et de la déformation mécanique pour permettre l'assemblage et la libération de la coiffe 13c.Indeed, by applying an increase or reduction in the temperature of the cap 13c and/or the first part 13 to a predefined assembly temperature value, the thermal expansion contribution makes it possible to modify the connection between the cap 13c and the first one part 13, so that the deformed position of the cap 13c allows its release, whereas it does not allow its release at room temperature. The applied thermal expansion thus makes it possible to increase the range of movement between the cap and the first part of the cover. This embodiment therefore offers additional safety relative to the first alternative embodiment, avoiding accidental release of the cap at room temperature. As an additional note, at the assembly temperature, the rest position of the cap 13c does not allow its release. The combined action of thermal expansion and mechanical deformation is therefore necessary to allow the assembly and release of the cap 13c.

Avantageusement, la température d'assemblage de la coiffe 13c et/ou de la première partie 13 est telle qu'elle requiert une différence de température entre la coiffe 13c et la première partie 13 supérieure ou égale à 80 degrés C, voire supérieure ou égale à 100 degrés C, voire supérieure ou égale à 200 degrés C, voire supérieure ou égale à 300 degrés C, voire supérieure ou égale à 400 degrés C, voire supérieure ou égale à 500 degrés C.Advantageously, the assembly temperature of the cap 13c and/or the first part 13 is such that it requires a temperature difference between the cap 13c and the first part 13 greater than or equal to 80 degrees C, or even greater than or equal to at 100 degrees C, or even greater than or equal to 200 degrees C, or even greater than or equal to 300 degrees C, or even greater than or equal to 400 degrees C, or even greater than or equal to 500 degrees C.

Avantageusement, on agit sur le matériau de la coiffe ou de la première partie ayant le coefficient de dilatation le plus élevé, en le chauffant ou le refroidissant selon sa position dans l'assemblage. Les températures et/ou les rampes de températures sont sélectionnées pour obtenir une dilatation ou une contraction suffisante, sans modifier fondamentalement la structure du matériau sur lequel on agit et en maîtrisant les éventuels chocs thermiques.Advantageously, we act on the material of the cap or of the first part having the highest coefficient of expansion, by heating or cooling it depending on its position in the assembly. The temperatures and/or temperature ramps are selected to obtain sufficient expansion or contraction, without fundamentally modifying the structure of the material on which we act and by controlling possible thermal shocks.

Par exemple, dans le cas d'une coiffe en céramique assemblée avec un couvercle en acier, il est proposé d'effectuer l'assemblage en préchauffant la coiffe à une température d'assemblage prédéterminée. La dilatation du matériau obtenue par cet échauffement permet à la coiffe de venir s'emboiter aisément sur la première partie du couvercle.For example, in the case of a ceramic cap assembled with a steel cover, it is proposed to carry out the assembly by preheating the cap to a predetermined assembly temperature. The expansion of The material obtained by this heating allows the cap to fit easily onto the first part of the cover.

Le dimensionnement des éléments assemblés est effectué en tenant compte de l'allongement obtenu par déformation élastique, de l'allongement ou du rétrécissement obtenu par dilatation/contraction thermique, et des tolérances des cotes d'usinage et/ou de frittage et/ou de rectification de la coiffe. En effet, l'allongement total obtenu est la somme de l'allongement obtenu par déformation élastique Δd et de l'allongement obtenu par déformation thermique Δdt, et il est conçu pour être supérieur à la somme des tolérances des côtes d'assemblage entre la coiffe et la première partie du couvercle.The dimensioning of the assembled elements is carried out taking into account the elongation obtained by elastic deformation, the elongation or shrinkage obtained by thermal expansion/contraction, and the tolerances of the machining and/or sintering dimensions and/or rectification of the cap. In fact, the total elongation obtained is the sum of the elongation obtained by elastic deformation Δd and the elongation obtained by thermal deformation Δdt, and it is designed to be greater than the sum of the tolerances of the assembly dimensions between the cap and the first part of the cover.

A titre d'exemple, pour une coiffe 13c se présentant selon la géométrie représentée par les figures 2 et 3, d'une longueur de 21 mm et d'épaisseur 1 mm, en zircone yttriée brute de frittage, assemblée avec une course de montage ΔL de 0.24 mm, on obtient un allongement de 0.13 mm lors de l'application d'une force permettant la mise en contact de l'intérieur de la coiffe 13c avec la surface supérieure de la première partie 13, comme mentionné précédemment. En chauffant la coiffe à 500°C, un allongement supplémentaire de 0.11 mm est obtenu, et donc un allongement total de 0.24 mm.By way of example, for a cap 13c presented according to the geometry represented by the figure 2 And 3 , with a length of 21 mm and a thickness of 1 mm, in raw sintered yttriated zirconia, assembled with an assembly stroke ΔL of 0.24 mm, an elongation of 0.13 mm is obtained when applying a force allowing bringing the interior of the cap 13c into contact with the upper surface of the first part 13, as mentioned previously. By heating the cap to 500°C, an additional elongation of 0.11 mm is obtained, and therefore a total elongation of 0.24 mm.

Il apparaît donc que l'utilisation de la dilatation thermique permet de dimensionner les organes d'assemblage et d'accrochage correspondants de façon à permettre l'assemblage en chauffant la coiffe tout en empêchant le désassemblage à température ambiante.It therefore appears that the use of thermal expansion makes it possible to size the corresponding assembly and attachment members so as to allow assembly by heating the cap while preventing disassembly at room temperature.

Des réalisations différentes peuvent ainsi être mises en oeuvre dans le cadre de cette deuxième variante du mode de réalisation.Different embodiments can thus be implemented within the framework of this second variant of the embodiment.

Les figures 4 et 5 représentent ainsi, selon un premier exemple de la deuxième variante de réalisation, une coiffe 13c assemblée sur une première partie 13 par l'intermédiaire d'organes d'accrochage et d'assemblage de géométrie différente de la réalisation des figures 2 et 3. La première partie 13 comprend une surface supérieure comprenant une partie centrale évidée entre deux surfaces latérales 54 s'étendant longitudinalement. Ces deux surfaces latérales 54 sont reliées entre elles par deux poutres transversales 53 agencées à proximité des deux extrémités longitudinales de la première partie 13. Les deux surfaces latérales s'étendent légèrement au-delà de ces poutres transversales 53 au niveau des extrémités de la première partie 13, formant des brancards latéraux 54.THE figures 4 And 5 thus represent, according to a first example of the second alternative embodiment, a cap 13c assembled on a first part 13 via hooking and assembly members of geometry different from the realization of the figure 2 And 3 . The first part 13 comprises an upper surface comprising a central recessed part between two side surfaces 54 extending longitudinally. These two lateral surfaces 54 are connected together by two transverse beams 53 arranged near the two longitudinal ends of the first part 13. The two lateral surfaces extend slightly beyond these transverse beams 53 at the level of the ends of the first part 13, forming side stretchers 54.

La coiffe 13c comprend deux évidements 43 transversaux au niveau de sa surface inférieure, adaptés pour collaborer avec les deux poutres transversales 53 de la première partie 13.The cap 13c comprises two transverse recesses 43 at the level of its lower surface, adapted to collaborate with the two transverse beams 53 of the first part 13.

Dans cet exemple de réalisation, la première partie 13 est en acier inoxydable 904L d'une longueur initiale de 21 mm avec une distance entre les poutres transversales 53 de 16 mm, à température ambiante. Elle est chauffée à la température d'assemblage de 400°C, ce qui permet d'obtenir un allongement supplémentaire entre les poutres transversales 53 de 0.11 mm. La coiffe 13c est gardée à température ambiante.In this exemplary embodiment, the first part 13 is made of 904L stainless steel with an initial length of 21 mm with a distance between the transverse beams 53 of 16 mm, at room temperature. It is heated to the assembly temperature of 400°C, which makes it possible to obtain an additional elongation between the transverse beams 53 of 0.11 mm. Cap 13c is kept at room temperature.

Lors d'une phase d'assemblage, la coiffe 13c est ainsi positionnée sur la première partie 13 préchauffée, puis déformée élastiquement comme mentionné précédemment, pour permettre son clipsage sur la première partie, par coopération de ses organes d'assemblage formés par les deux évidements transversaux 43 sur les organes d'accrochage correspondants de la première partie formés par les deux poutres transversales 53. Lorsque la coiffe et la première partie reprennent leur position initiale, après relâchement de la coiffe qui reprend sa position de repos et le refroidissement de l'ensemble à la température ambiante, les flancs 43a des évidements transversaux 43 de la coiffe 13c viennent s'appuyer sur les flancs 53a des poutres transversales 53 de la première partie 13, assurant un maintien de la coiffe 13c sur la première partie 13.During an assembly phase, the cap 13c is thus positioned on the first preheated part 13, then elastically deformed as mentioned previously, to allow it to be clipped onto the first part, by cooperation of its assembly members formed by the two transverse recesses 43 on the corresponding attachment members of the first part formed by the two transverse beams 53. When the cap and the first part return to their initial position, after release of the cap which returns to its rest position and cooling of the assembly to ambient temperature, the sides 43a of the transverse recesses 43 of the cap 13c come to rest on the sides 53a of the transverse beams 53 of the first part 13 , ensuring that the cap 13c is held in place on the first part 13.

En chauffant à nouveau la première partie 13 à la température d'assemblage, les poutres transversales 53 sont écartées l'une de l'autre par la dilatation de la première partie 13, de sorte à permettre le retrait de la coiffe 13c dans sa position déformée en appliquant une pression au centre de la coiffe. De préférence la coiffe est conservée à température ambiante ou refroidie.By heating the first part 13 again to the assembly temperature, the transverse beams 53 are spaced apart from each other by the expansion of the first part 13, so as to allow the cap 13c to be removed in its position deformed by applying pressure to the center of the cap. Preferably the cap is stored at room temperature or cooled.

Dans une variante non représentée, la plaquette est rectifiée et une contre dépouille de retenue est agencée sur la première partie 13 et/ou sur la coiffe 13c. Par exemple, les flancs 43a des évidements transversaux 43 et/ou les flancs 53a des poutres transversales 53 comprennent des moyens d'encliquetage pour encliqueter les bordures de la coiffe 13c avec la première partie 13. Ces moyens d'encliquetage peuvent par exemple se présenter sous la forme d'une queue d'aronde, ou d'une rainure et d'une languette, ou d'un ou plusieurs ergot(s) avec des évidements correspondants, etc. Dans une autre variante non illustrée, la coiffe 13c comprend en outre une rainure latérale adaptée pour encliqueter également les bordures de la coiffe 13c avec la première partie 13.In a variant not shown, the plate is ground and a retaining undercut is arranged on the first part 13 and/or on the cap 13c. For example, the sides 43a of the transverse recesses 43 and/or the sides 53a of the transverse beams 53 comprise latching means for latching the edges of the cap 13c with the first part 13. These latching means can for example be presented in the form of a dovetail, or a tongue and groove, or one or more lug(s) with corresponding recesses, etc. In another variant not illustrated, the cap 13c further comprises a lateral groove adapted to also snap the edges of the cap 13c with the first part 13.

Les figures 6 et 7 représentent un deuxième exemple de réalisation selon la deuxième variante de réalisation, pour lequel une coiffe 13c est assemblée sur une première partie 13 par l'intermédiaire d'organes d'accrochage et d'assemblage de géométrie différente des réalisations précédentes. La première partie 13 comprend une surface supérieure comprenant une portion centrale en retrait, formant un logement pour une coiffe 13c, de manière similaire à la réalisation visible sur la figure 1. Toutefois, les organes d'accrochage et d'assemblage sont agencés transversalement, et non longitudinalement.THE figures 6 And 7 represent a second exemplary embodiment according to the second alternative embodiment, for which a cap 13c is assembled on a first part 13 via hooking and assembly members of geometry different from previous embodiments. The first part 13 comprises an upper surface comprising a recessed central portion, forming a housing for a cap 13c, of manner similar to the achievement visible on the figure 1 . However, the hooking and assembly members are arranged transversely, and not longitudinally.

Dans cet exemple, des organes d'accrochage 50, 50' sont agencés dans les flancs verticaux latéraux 134, 135 bordant la portion centrale en retrait de la première partie 13, sous forme d'éléments d'encliquetage. En complément, la coiffe 13c comprend des organes d'assemblage correspondants, agencés sous la forme d'élément d'encliquetage 40, 40' agencés sur son flanc latéral.In this example, hooking members 50, 50' are arranged in the lateral vertical flanks 134, 135 bordering the recessed central portion of the first part 13, in the form of snap-fastening elements. In addition, the cap 13c comprises corresponding assembly members, arranged in the form of snap-fastening elements 40, 40' arranged on its lateral side.

Avantageusement, quatre, six ou plus éléments d'encliquetage correspondants sont prévus dans cette variante. Les éléments d'encliquetage peuvent par exemple prendre la forme d'ergots associés à un évidement ou une rainure. Ils sont dimensionnés en fonction du matériau constitutif afin de résister aux contraintes subies par le fermoir.Advantageously, four, six or more corresponding latching elements are provided in this variant. The latching elements can for example take the form of lugs associated with a recess or a groove. They are sized according to the constituent material in order to withstand the stresses suffered by the clasp.

Par exemple, la première partie 13 peut se présenter en acier inoxydable 904L de 21 mm, être chauffée à une température d'assemblage de 400 °C, ce qui induit une dilatation latérale de 0.06 mm. La première partie 13 est déformée élastiquement afin d'écarter les première et deuxième parois et permettre le positionnement de la coiffe 13c, de manière à faire correspondre les organes d'accrochage 50, 50' de la première partie avec les organes d'assemblage 40, 40' de la coiffe. L'ensemble est ensuite refroidi. A température ambiante, les organes d'accrochage 50, 50' de la première partie et les organes d'assemblage 40, 40' de la coiffe sont imbriqués, assurant le maintien de la coiffe 13c sur le couvercle, même en cas de déformation. En chauffant à nouveau spécifiquement la première partie 13 à la température d'assemblage, il est possible de retirer la coiffe 13c. Cet exemple illustre que l'invention peut être mise en oeuvre sur la base d'une deuxième partie déformable élastiquement, au lieu de la coiffe dans les autres modes de réalisation décrits.For example, the first part 13 can be made of 21 mm 904L stainless steel and be heated to an assembly temperature of 400°C, which induces a lateral expansion of 0.06 mm. The first part 13 is elastically deformed in order to separate the first and second walls and allow the positioning of the cap 13c, so as to correspond the hooking members 50, 50' of the first part with the assembly members 40 , 40' from the cap. The whole thing is then cooled. At room temperature, the hooking members 50, 50' of the first part and the assembly members 40, 40' of the cover are interlocked, ensuring that the cover 13c is held on the cover, even in the event of deformation. By specifically heating the first part 13 again to the assembly temperature, it is possible to remove the cap 13c. This example illustrates that the invention can be implemented on the basis of a second elastically deformable part, instead of the cap in the other embodiments described.

Naturellement, dans une variante de cette réalisation, la coiffe 13c pourrait comprendre en outre deux rebords à ses extrémités distales longitudinales, agencés pour recouvrir les extrémités distales de la surface supérieure de la première partie 13. Avantageusement, ces rebords seraient maintenus sur le couvercle par clipsage, comme décrit précédemment dans le cadre du premier mode de réalisation. Plus généralement, les variantes de réalisation précédentes peuvent naturellement être combinées.Naturally, in a variant of this embodiment, the cap 13c could further comprise two flanges at its longitudinal distal ends, arranged to cover the distal ends of the upper surface of the first part 13. Advantageously, these flanges would be held on the cover by clipping, as described previously in the context of the first embodiment. More generally, the preceding embodiments can naturally be combined.

Par exemple, dans le cas d'une coiffe en céramique assemblée avec un couvercle en acier, il est proposé d'effectuer l'assemblage en préchauffant la coiffe à une température d'assemblage prédéterminée. La dilatation du matériau obtenue par cet échauffement permet à la coiffe de venir s'emboiter aisément sur la première partie métallique du couvercle. Alternativement, la première partie métallique du couvercle peut être chauffée et la coiffe en céramique maintenue à température ambiante. Finalement, le concept peut être mis en oeuvre avec toute coiffe et première partie présentant une différence de comportement à la dilatation thermique entre elles.For example, in the case of a ceramic cap assembled with a steel cover, it is proposed to carry out the assembly by preheating the cap to a predetermined assembly temperature. The expansion of the material obtained by this heating allows the cap to fit easily onto the first metal part of the cover. Alternatively, the first metal part of the cover can be heated and the ceramic cap maintained at room temperature. Finally, the concept can be implemented with any cap and first part presenting a difference in thermal expansion behavior between them.

Naturellement, l'invention ne se limite pas aux exemples et variantes de réalisation décrites, mais seulement à l'étendue des revendications. Notamment, tout autre nombre d'organes d'accrochage de la première partie et d'organes d'assemblage de la coiffe est possible. Ces organes peuvent de plus se présenter sous une autre forme, et au niveau d'un positionnement différent. Par exemple, ces organes peuvent se présenter sous la forme d'un crochet et/ou d'une encoche et/ou d'un évidement et/ou d'une rainure et/ou d'un ergot et/ou d'une poutre. De même, la coiffe pourrait prendre toute autre forme, et tout autre positionnement sur la première partie, non nécessairement centrée. Elle peut se présenter sous une autre géométrie, induisant sa déformation possible par une pression dans une autre direction que la direction verticale décrite. comme susmentionné, la première partie pourrait présenter une géométrie permettant sa déformation élastique. Ainsi, l'invention s'applique à tout mode de réalisation impliquant une déformation élastique de la coiffe et/ou de la première partie.Naturally, the invention is not limited to the examples and variant embodiments described, but only to the scope of the claims. In particular, any other number of attachment members of the first part and assembly members of the cap is possible. These organs can also be presented in another form, and at a different positioning. For example, these members can be in the form of a hook and/or a notch and/or a recess and/or a groove and/or a lug and/or a beam . Likewise, the cap could take any other shape, and any other positioning on the first part, not necessarily centered. It may present itself in another geometry, inducing its possible deformation by pressure in a direction other than the vertical direction described. as mentioned above, the first part could present a geometry allowing its elastic deformation. Thus, the invention applies to any embodiment involving elastic deformation of the cap and/or the first part.

De plus, l'invention a été décrite dans le cadre d'un couvercle de fermoir. Toutefois, comme mentionné précédemment, le même concept peut être intégré sur tout autre composant d'habillage horloger, par exemple une carrure ou une maille de bracelet.Additionally, the invention has been described in the context of a clasp cover. However, as mentioned previously, the same concept can be integrated into any other watch exterior component, for example a middle part or a bracelet link.

L'invention porte aussi sur un bracelet, caractérisé en qu'il comprend un couvercle de fermoir tel que décrit précédemment ou un fermoir tel que décrit précédemment. L'invention porte aussi sur une montre bracelet comprenant un tel bracelet ou plus généralement au moins un composant horloger tel que décrit précédemment.The invention also relates to a bracelet, characterized in that it comprises a clasp cover as described above or a clasp as described above. The invention also relates to a wristwatch comprising such a bracelet or more generally at least one watch component as described above.

Finalement, l'invention atteint bien les objets recherchés, et présente les avantages suivants :

  • Elle permet un assemblage simple et sans risque de dégradation d'une coiffe sur un composant horloger ;
  • Elle est compatible avec l'utilisation d'une coiffe robuste, résistant aux contraintes externes comme les chocs et les rayures ;
  • Elle permet une fixation fiable de la coiffe, évitant tout désassemblage involontaire ;
  • La coiffe est amovible, sans risque de dégradation du composant horloger, ce qui permet de la changer en cas de besoin ;
  • La solution est compatible avec l'utilisation d'une multitude de matériaux, parmi lesquels ceux habituellement utilisés pour une recherche d'un aspect esthétique attractif.
Finally, the invention achieves the desired objects, and has the following advantages:
  • It allows simple assembly without risk of damage to a cap on a watch component;
  • It is compatible with the use of a robust cap, resistant to external constraints such as impacts and scratches;
  • It allows reliable fixation of the cap, avoiding any involuntary disassembly;
  • The cap is removable, without risk of damage to the watch component, which allows it to be changed if necessary;
  • The solution is compatible with the use of a multitude of materials, including those usually used to achieve an attractive aesthetic appearance.

L'invention porte aussi sur un procédé de fabrication d'un composant horloger, caractérisé en ce qu'il comprend une étape de fixation d'une coiffe 13c sur une première partie 13 du composant horloger en déformant élastiquement la coiffe 13c d'une position de repos à une position déformée et/ou en déformant élastiquement la première partie 13 d'une position de repos à une position déformée.The invention also relates to a method of manufacturing a watch component, characterized in that it comprises a step of fixing a cap 13c on a first part 13 of the watch component by elastically deforming the cap 13c from a position rest to a deformed position and/or by elastically deforming the first part 13 from a rest position to a deformed position.

Ce procédé peut comprendre une étape préalable de chauffage et/ou de refroidissement d'au moins la coiffe 13c et/ou de la première partie 13, jusqu'à une température d'assemblage.This process may include a preliminary step of heating and/or cooling at least the cap 13c and/or the first part 13, up to an assembly temperature.

L'étape de fixation de la coiffe 13c sur la première partie 13 peut comprendre une sous-étape de positionnement de la coiffe 13c sur la première partie 13 puis une sous-étape d'application d'une force verticale sensiblement au centre de la coiffe 13c pour la déformer d'une position de repos jusqu'à une position déformée dans laquelle des organes d'assemblage de la coiffe 13c sont aptes à venir en coopération avec des organes d'accrochage de la première partie 13.The step of fixing the cap 13c on the first part 13 may comprise a sub-step of positioning the cap 13c on the first part 13 then a sub-step of applying a vertical force substantially to the center of the cap 13c to deform it from a rest position to a deformed position in which assembly members of the cap 13c are able to come into cooperation with attachment members of the first part 13.

Claims (16)

  1. A timepiece component, which has a first part (13) and a removable cap (13c), the timepiece component being able to adopt a fastening configuration in which the removable cap (13c) is fastened to the first part (13), and a free configuration in which the cap (13c) is separated from the first part, the first part (13) comprising at least two latching members that are intended to cooperate with respectively at least two corresponding assembly members of the cap (13c) in the fastening configuration, and the cap (13c) and/or the first part (13) is elastically deformable from a rest position to a deformed position in such a way that the deformed position of the cap (13c) and/or of the first part (13) is suitable for positioning and removing it respectively from the first part (13) and/or from the cap (13c) for passing from the fastening configuration to the free configuration of the timepiece component and vice versa, and such that the rest position makes it possible to stably maintain the fastening configuration of the timepiece component in which the at least two assembly members of the cap (13c) are in engagement with the at least two latching members of the first part (13), the timepiece component is characterized in that it is designed such that, in the fastening configuration and at ambient temperature, the deformed position of the cap (13c) and/or of the first part (13) does not allow the cap (13c) to be released from the first part (13) of the timepiece component, and such that, in the fastening configuration, the deformed position of the cap (13c) and/or of the first part (13) allows the cap (13c) to be released from the first part (13) of the timepiece component by raising or lowering the temperature of the cap (13c) and/or of the first part (13) to an assembly temperature value, making it possible to pass from the fastening configuration to the free configuration of the timepiece component by thermal expansion contribution.
  2. The timepiece component as claimed in the preceding claim, characterized in that the assembly temperature of the cap (13c) and/or of the first part (13) is such that it requires a temperature difference, between the cap (13c) and the first part (13), of greater than or equal to 80 degrees C, or even greater than or equal to 100 degrees C, or even greater than or equal to 200 degrees C, or even greater than or equal to 300 degrees C, or even greater than or equal to 400 degrees C, or even greater than or equal to 500 degrees C.
  3. The timepiece component as claimed in one of the preceding claims, characterized in that the application of an assembly temperature to at least the cap (13c) and/or the first part (13) makes it possible to assemble the cap (13c) in the deformed position with the first part (13), making it possible to pass from the free configuration to the fastening configuration of the timepiece component, and makes it possible to stably maintain the fastening configuration of the timepiece component in which the cap (13c) is as one with the first part (13) when the cap (13c) and/or the first part (13) is in its rest position.
  4. The timepiece component as claimed in one of the preceding claims, characterized in that, in the fastening configuration of the timepiece component, the cap (13c) is separated from the first part (13) by a cavity which allows the cap (13c) to deform from its rest position to its deformed position by simple pressure on the cap (13c), by means of which it deforms so as to occupy all or part of the volume of the cavity.
  5. The timepiece component as claimed in the preceding claim, characterized in that the cavity has a volume such that the first part (13) forms a stop that limits the maximum deformation of the cap (13c) below its elastic limit.
  6. The timepiece component as claimed in one of claims 1 to 3 and as claimed in either of claims 4 and 5, characterized in that at ambient temperature the maximum deformation of the cap (13c) and/or of the first part (13) does not make it possible to release the cap (13c) and/or the first part (13) by simple unclipping of the cap (13c) and/or the first part (13).
  7. The timepiece component as claimed in one of the preceding claims, characterized in that the cap (13c) is curved with a rest radius of curvature when in the rest position, and in that it is curved with an increased radius of curvature when in the deformed position.
  8. The timepiece component as claimed in one of the preceding claims, characterized in that the cap (13c) is in the form of a substantially planar and elongate element, and in that the cap (13c) comprises at least a first assembly member (40; 43) and a second assembly member (41; 43) that are arranged respectively at its two opposite distal ends and/or on two opposite lateral sides, these assembly members (40; 43) being arranged on that surface of the cap (13c) that is intended to be oriented towards the first part (13) of the timepiece component when in the fastening configuration and/or being arranged on the edge face of the cap (13c).
  9. The timepiece component as claimed in one of the preceding claims, characterized in that the first part (13) comprises at least a first latching member (50) and a second latching member (51) and in that the cap (13c) comprises at least a first assembly member (40) and a second assembly member (41) that are intended to cooperate respectively with the at least one first latching member (50) and second latching member (51) of the first part (13), and in that the first latching member (50) of the first part (13), the second latching member (51) of the first part (13), the first assembly member (40) of the cap (13c), and/orthe second assembly member (41) of the cap (13c), is/are in the form of a hook and/or a notch and/or a cutaway and/or a groove and/or a lug and/or a beam.
  10. The timepiece component as claimed in one of the preceding claims, characterized in that:
    - the timepiece component is a bracelet clasp cover and the cap (13c) is a substantially planar element that is able to extend over all or part of the upper surface of the cover (13) in the fastening configuration of the timepiece component; or
    - the timepiece component is a middle and the cap (13c) is a substantially planar element that is able to fasten to all or part of the upper or lateral surface of the middle; or
    - the timepiece component is a bracelet link and the cap (13c) is a substantially planar element that is able to fasten to all or part of the upper surface of the bracelet link.
  11. The timepiece component as claimed in one of the preceding claims, characterized in that the first part (13) is made of a metal alloy, for example stainless steel, gold, platinum, bronze or titanium.
  12. The timepiece component as claimed in one of the preceding claims, characterized in that the cap (13c) is made of ceramic, cermet, glass, sapphire, mother-of-pearl, amber or natural or reconstituted stone.
  13. A timepiece, in particular a watch, characterized in that it comprises a timepiece component as claimed in one of the preceding claims.
  14. A method for manufacturing a timepiece component as claimed in one of claims 1 to 12, characterized in that it comprises a step of fastening a cap (13c) to a first part (13) of the timepiece component, deforming it elastically from a rest position to a deformed position and/or elastically deforming said first part (13) from a rest position to a deformed position.
  15. The method for manufacturing a timepiece component as claimed in the preceding claim, characterized in that it comprises a prior step of heating and/or cooling the cap (13c) and/or the first part (13) to an assembly temperature.
  16. The method for manufacturing a timepiece component as claimed in claim 14 or 15, characterized in that the step of fastening the cap (13c) to the first part (13) comprises a sub-step of positioning the cap (13c) on the first part (13) then a sub-step of applying a vertical force substantially at the center of the cap (13c) so as to deform it from a rest position to a deformed position in which assembly members of the cap (13c) are able to cooperate with latching members of the first part (13).
EP20191466.0A 2020-08-18 2020-08-18 Timepiece component provided with a cover Active EP3957206B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP20191466.0A EP3957206B1 (en) 2020-08-18 2020-08-18 Timepiece component provided with a cover
US17/401,540 US11638467B2 (en) 2020-08-18 2021-08-13 Timepiece component provided with a cap
JP2021132624A JP2022034543A (en) 2020-08-18 2021-08-17 Timepiece component with cap
CN202110948489.5A CN114073360A (en) 2020-08-18 2021-08-18 Timepiece assembly provided with a cover

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20191466.0A EP3957206B1 (en) 2020-08-18 2020-08-18 Timepiece component provided with a cover

Publications (2)

Publication Number Publication Date
EP3957206A1 EP3957206A1 (en) 2022-02-23
EP3957206B1 true EP3957206B1 (en) 2024-04-24

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP20191466.0A Active EP3957206B1 (en) 2020-08-18 2020-08-18 Timepiece component provided with a cover

Country Status (4)

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US (1) US11638467B2 (en)
EP (1) EP3957206B1 (en)
JP (1) JP2022034543A (en)
CN (1) CN114073360A (en)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2446068A (en) * 1946-12-27 1948-07-27 Kestenman Bros Mfg Co Clasp for wrist-watch bracelets and other linkages
CH473549A (en) * 1967-01-06 1969-06-15 Omega Brandt & Freres Sa Louis Clasp for bracelet
US3609962A (en) * 1970-01-23 1971-10-05 Kurt A Rieth Link for a buckle,watch bracelet,watch strap or similar article
JPS59103624U (en) 1982-12-28 1984-07-12 シチズン時計株式会社 Connecting fittings for accessories
FR2612747B1 (en) * 1987-03-23 1989-06-09 Rado Montres Sa BRACELET WITH A FLEXIBLE SOUL
DE19906127C2 (en) * 1999-02-13 2002-09-26 Rowi Rodi & Wienenberger Gmbh Elastic bracelet, especially watch strap
JP4641098B2 (en) * 2000-12-26 2011-03-02 シチズンホールディングス株式会社 Nakadome cover material structure
US20090238045A1 (en) * 2008-03-21 2009-09-24 Arthur Felton Ac's wristwatch ez-wear protective clip-on/cover
EP3957205A1 (en) * 2020-08-18 2022-02-23 Rolex Sa Timepiece component provided with a cover

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US20220053891A1 (en) 2022-02-24
CN114073360A (en) 2022-02-22
EP3957206A1 (en) 2022-02-23
US11638467B2 (en) 2023-05-02
JP2022034543A (en) 2022-03-03

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