EP2796939A1 - Divided stem and related assembly method - Google Patents

Divided stem and related assembly method Download PDF

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Publication number
EP2796939A1
EP2796939A1 EP20130164992 EP13164992A EP2796939A1 EP 2796939 A1 EP2796939 A1 EP 2796939A1 EP 20130164992 EP20130164992 EP 20130164992 EP 13164992 A EP13164992 A EP 13164992A EP 2796939 A1 EP2796939 A1 EP 2796939A1
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EP
European Patent Office
Prior art keywords
rod
distal end
welding
proximal
fixing
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
EP20130164992
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German (de)
French (fr)
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EP2796939B1 (en
Inventor
David Benjamin Kraehenbuehl
Jonathan Collaud
Marco Bettelini
André Nussbaum
Daniel Gruenig
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ETA SA Manufacture Horlogere Suisse
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ETA SA Manufacture Horlogere Suisse
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Application filed by ETA SA Manufacture Horlogere Suisse filed Critical ETA SA Manufacture Horlogere Suisse
Priority to EP13164992.3A priority Critical patent/EP2796939B1/en
Publication of EP2796939A1 publication Critical patent/EP2796939A1/en
Application granted granted Critical
Publication of EP2796939B1 publication Critical patent/EP2796939B1/en
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    • 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
    • G04B3/00—Normal winding of clockworks by hand or mechanically; Winding up several mainsprings or driving weights simultaneously
    • G04B3/04—Rigidly-mounted keys, knobs or crowns
    • G04B3/041—Construction of crowns for rotating movement; connection with the winding stem; winding stems

Definitions

  • the present invention relates to a particular method of assembly for a stem of a timepiece.
  • a rod is used, the first part of which is coupled to the movement, and housed in the middle with the rest of the movement, to which is added, at its free end, a second portion introduced by its proximal end through an orifice of the build.
  • This second part also typically comprises, at its distal end, a gripping ring to allow the user to perform particular adjustment operations.
  • the coupling between the portion of the rod secured to the movement and that comprising the crown is generally made using elements male and female, for example by screwing or by driving.
  • Each of these two mounting methods has drawbacks respectively in terms of cost and reliability of assembly. Indeed, if a screw mounting is preferred, it is necessary to perform the machining operation, performed in the context of the machining of threads and tappings of the rod assembly parts, with extreme precision to guarantee a sufficient tightening torque at the end of the stroke, to maintain the assembled position even in case of shock, vibration or significant thermal variations, which is very expensive.
  • the present invention relates to a method for assembling a rod in two parts of a timepiece, the rod comprising a first portion provided with a first proximal end cooperating with a movement, and a first distal end of attachment, and a second portion provided with a second proximal end of attachment and a second distal end, characterized in that it contains a step of welding or bonding the first distal end of attachment of the first portion of the shaft at the second proximal end of attachment of said second portion of the shaft.
  • the invention also relates to a two-part stem of a timepiece comprising a first part provided with a first proximal end cooperating with a movement, and a first distal end of attachment, and a second part provided with a a second proximal end of attachment and a second distal end, the first distal end of attachment of the first portion of the shaft being welded or glued to the second proximal end of attachment of the second portion of the shaft.
  • An advantage of the present invention is to provide a more effective, safe and durable method and fastening device for a broken stem of a timepiece.
  • the risk of rupture, particularly during operations of axial drawing of the crown by the user is almost eliminated, and the rod is more resistant to all other constraints normal use of a watch in terms of shock, vibration and thermal variations.
  • Another advantage of the proposed solution is that it makes it easier to mount the part of the rod out of the plate, while hiding the mounting location in the middle part, without risk of damaging the movement, but while ensuring nevertheless a solid fixation and a better life.
  • Yet another advantage of the proposed solution is not to slow down the rate of production, the proposed assembly operation can be performed on a production line in a period substantially equivalent to that corresponding to a screwing operation or hunting.
  • FIGS. 1A, 1B and 1C show the two parts of a rod 10 before assembly, the Figure 1B being a sectional view of the Figure 1A along the AA axis.
  • the Figure 1A is a side view of each of these parts, the left part constituting a first part 1 of the rod intended to be coupled to the movement, here via the gear wheel 13 (better visible on the figure 1C perspective), while the right part is a second portion 2 to be manipulated by the user, here through a ring 23 arranged at its end.
  • proximal end is called the one closest to the center of the watch in which the rod is intended to be housed, and respectively by distal end that which is located in the further from the center of the watch. It is therefore moved with increasing radius relative to the center of the watch to go from the proximal end to the distal end.
  • the rod according to the preferred embodiment of the invention illustrated by the FIGS. 1A, 1B and 1C in disassembled position and by FIGS. 2A, 2B, 2C is thus a rod for a watch, such as for example a fully mechanical watch winding stem or a simple time-setting rod for a quartz watch, whose gear wheel 13 with the movement is arranged at the level of a first proximal end 11 of the first portion 1 of the rod, while the ring 23 for gripping and manipulation is arranged at a second distal end 22 of the second portion 2 of the rod.
  • a series of splines 17 is arranged on the first part 1 of the rod to allow the positioning of a jumper - not shown - determining different axial positions of the rod.
  • three splines can be distinguished which can for example correspond to a current operating mode, a fast date correction mode and a time setting mode.
  • a groove 26 can moreover be arranged on the second part 2 of the rod to typically accommodate a seal 5, not shown on the Figures 1A-C and 2A-C but visible on the figure 3 .
  • the assembly of the first and second parts of the rod is performed at the first distal end 12 of the first portion 1 and the second proximal end 21 of the second portion 2 of the rod, by introducing a pin 25 arranged on the second portion 2 of the rod in a blind hole 16 arranged in the first distal end 12 of the first portion 1 of the rod.
  • This casing operation may or may not be accompanied by a slight driving of the post 26 in the hole 16, but does not require very precise machining tolerances for the correspondence between the diameter of the hole 16 and that of the post 25, because the final fixing operation is performed during a subsequent welding operation, illustrated in particular by the Figures 2A, 2B described below.
  • each of the parts of the rod also contains bearing surfaces, intended to be brought into contact with each other before the welding operation.
  • the first part of the rod 1 comprises a first annular support surface 14 surrounding the hole 16
  • the second part of the rod 2 comprises a second bearing surface 24 surrounding the tenon 25, referenced on the Figures 1A and 1B .
  • the diameter of the first portion 1 of the rod is slightly lower, at the first distal end 12 of fixation, to that of the body of this first portion 1 of the rod.
  • the narrowing of the diameter at this level therefore reveals a shoulder 15, the function of which is notably to prevent the formation of prominent flanges after the welding or bonding operation 100, on the one hand, and on the other hand to be able to affix easily, thanks to the presence of an axial abutment surface provided by the shoulder 15, a clamp for retaining the first portion 1 of the rod coupled to the movement in the middle and thus clear a working crown (not shown) before to mount the second part 2 of the rod.
  • a working crown not shown
  • FIGS. 2A, 2B and 2C show views identical to those of FIGS. 1A, 1B and 1C , first part 1 and second part 2 of the rod 10, but this time with the parts joined to each other.
  • These first part 1 and second part 2 are moreover referenced only on the Figure 2B which is a sectional view of the Figure 1A along the BB axis. It is thus always possible to distinguish the gear wheel 13 at the first proximal end 11 of the first part 1, and the series of splines 17, but the respective bearing surfaces of each of the parts of the rod 10 when the it was mounted following the casing operation 200 of the post 25 of the second part 2 in the hole 16 of the first part 1.
  • This welding or bonding step 100 mutually secures the first annular support surface 14 to the second annular support surface 24 and thus definitively and irreversibly removes any relative degree of freedom in translation and in rotation of the second part 2 of the rod relative to the first part 1 of the rod 10.
  • An advantage of the fastening method proposed between the two parts of the rod is that it requires, in addition to machining tolerances less restrictive compared to a mode fastening by screwing or by driving, not an actual contact between the two bearing surfaces of each of the parts of the rod.
  • a mutual gap between the bearing surfaces of up to 0.1 mm can be tolerated and caught by melting parts, preferably made of metal or plastic.
  • the laser control parameters in terms of power and frequency can in this case be adapted to the nature of the material.
  • the welding operation is preferably performed using a laser operating with a light pipe at 200 micrometers, a power of 250W, and working at a frequency of 15Hz.
  • the welding or bonding step 100 preferably comprises the laying of a first welding point or glue for securing the first portion 1 of the rod to the second portion 2 of the rod. Then, the second portion 2 of the rod is rotated about its axis, for example by means of a gripping tool acting on the ring 23 at an angular speed preferably equal to half a turn per second, such that 30 solder or glue points are formed over the entire periphery of the diameter of the rod, thereby forming a quasi-continuous connection over the entire periphery of the bearing surfaces of each of the parts of the rod.
  • the figure 3 illustrates a rod according to a preferred embodiment, the two parts are secured by a welding or bonding operation 100, preferably a laser welding performed while the first part 1 of the rod is coupled to a movement 4.
  • the operation preliminary casing 200 is in this case also performed while the first part 1 of the rod has been mounted in the plate 3 of the movement 4, itself nested in a middle watch (not shown).
  • the splines 17 determining the discrete axial positions of operation of the rod, but henceforth also a projecting portion 18 out of the plate 3, this protruding portion still remaining preferably inside a watch case, not shown for reasons of legibility, and this in order to always hide the method of attachment and the parts welded or glued from the outside of the case for aesthetic reasons, as for conventional broken rods.
  • On the second part 2 of the rod there is a seal 5 housed preferably in a groove, and the ring 23 gripping for manipulations performed by the user.
  • the welding operation for the mutual attachment of the first and the second part of the rod 10 is performed while the first part 1 of the rod has not only been previously coupled to the movement 4 after being introduced into an orifice 31 of the plate 3 and another through hole of the middle, after the plate 3 and the movement 4 have themselves already been nested in the middle part, but also tested in its various axial operating positions using a rod / working ring - not shown - which is then detached from the first part 1 of the rod with a clamp affixed to the shoulder (not referenced in this figure, but better visible on the Figures 1A-1B ) which allows to retain axially the first part 1 of the rod during removal of the working crown.
  • the rod corresponding to the preferred embodiment illustrated by the previously described figures comprises a simple shoulder 15 (see Figures 1A-1C in particular) at its fixing end
  • a complete groove at the first distal end 12 of fixation such groove comprising an additional retaining surface useful for handling Axial of the rod during preliminary operational tests before the actual welding or bonding operation.
  • this ease of use in terms of handling would nevertheless make parallel welding operation more difficult to achieve because of the small thickness resulting, for a given size of the first portion of the rod, the rim between the new axial stop and the first bearing surface 14 to be welded.
  • the fixing of the two parts of the rod is preferably always carried out outside the plate, because of the welding or bonding operation 100 carried out at the level of the first distal end 12 of attachment of the first part 1 of the rod, and which must not alter other elements of the movement 4.
  • Such an arrangement of a protruding portion 18 could also extend to outside the middle part, However, this would have the disadvantage of no longer hide the assembly mode or welded or glued parts.
  • the rod described corresponds to a winding or setting rod according to the preferred embodiment illustrated, which applies to both a mechanical watch and a quartz watch, it will be understood that the fixing method described applies to other types of rods for timepiece without departing from the scope of the present invention. It will also be understood that not only can laser or ultrasonic welding be envisaged as a technique for permanently and irreversibly mutually securing the two parts of the rod, but also other types of thermal welding, as well as brazing.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
  • Electromechanical Clocks (AREA)

Abstract

Méthode pour l'assemblage d'une tige en deux parties d'une pièce d'horlogerie, la tige comprenant une première partie pourvue d'une première extrémité proximale coopérant avec un mouvement, et d'une première extrémité distale de fixation, et une deuxième partie pourvue d'une deuxième extrémité proximale de fixation et d'une deuxième extrémité distale, caractérisée en ce qu'elle contient une étape de soudage ou de collage de la première extrémité distale de fixation de la première partie de la tige à la deuxième extrémité proximale de fixation de ladite deuxième partie de la tige.A method for assembling a two-part stem of a timepiece, the shaft comprising a first portion having a proximal proximal end cooperating with a movement, and a first distal end for attachment, and a second part provided with a second proximal end of fixation and a second distal end, characterized in that it contains a step of welding or gluing of the first distal end of attachment of the first part of the rod to the second proximal end of attachment of said second portion of the stem.

Description

La présente invention concerne une méthode d'assemblage particulière pour une tige d'une pièce d'horlogerie.The present invention relates to a particular method of assembly for a stem of a timepiece.

ARRIERE PLAN TECHNOLOGIQUEBACKGROUND TECHNOLOGY

Dans le domaine de l'horlogerie, et plus particulièrement des montres bracelets, il est connu d'utiliser des tiges en deux parties, notamment des tiges de remontoir, aussi appelées tiges brisées, pour faciliter le montage du mouvement dans la carrure. Ces tiges sont notamment utilisées pour des montres ayant un grand diamètre ou une grande épaisseur, pour lesquelles un montage automatique du mouvement dans la carrure sur des lignes de montage n'est plus possible. Des tiges brisées s'avèrent même nécessaires pour des pièces mécaniques de haute horlogerie comportant une boîte ouvragée, par exemple avec des motifs décoratifs gravés dans un fond monobloc venu de matière avec la carrure. Pour de telles boîtes sans fond amovible, il est impossible de mettre en place une tige de remontoir classique. On utilise dans ce cas une tige dont une première partie est accouplée au mouvement, et logée dans la carrure avec le reste du mouvement, à laquelle on adjoint, à son extrémité libre, une deuxième partie introduite par son extrémité proximale par un orifice de la carrure. Cette deuxième partie comprend par ailleurs typiquement, à son extrémité distale, une couronne de préhension pour permettre à l'utilisateur de faire notamment des opérations de réglage.In the field of watchmaking, and more particularly wristwatches, it is known to use two-piece rods, in particular winding rods, also called broken rods, to facilitate assembly of the movement in the caseband. These rods are particularly used for watches having a large diameter or a large thickness, for which an automatic assembly of the movement in the middle part on assembly lines is no longer possible. Broken rods are even necessary for mechanical fine watchmaking parts comprising a box gear, for example with decorative patterns engraved in a monobloc background came from the middle with the caseband. For such boxes without a removable bottom, it is impossible to set up a conventional winding stem. In this case, a rod is used, the first part of which is coupled to the movement, and housed in the middle with the rest of the movement, to which is added, at its free end, a second portion introduced by its proximal end through an orifice of the build. This second part also typically comprises, at its distal end, a gripping ring to allow the user to perform particular adjustment operations.

L'accouplement entre la partie de la tige solidaire du mouvement et celle comprenant la couronne est en général réalisée à l'aide d'éléments mâles et femelles, par exemple par vissage ou par chassage. Chacune de ces deux méthodes de montage présente toutefois des inconvénients respectivement en termes de coûts et de fiabilité d'assemblage. En effet, si un montage par vissage est privilégié, il est nécessaire de réaliser l'opération de décolletage, effectuée dans le cadre de l'usinage des filetages et des taraudages des parties d'assemblage de la tige, avec une précision extrême pour garantir un couple de serrage suffisant, en fin de course, pour assurer le maintien en position assemblée même en cas de chocs, de vibrations ou encore de variations thermiques importants, ce qui s'avère très onéreux. Si par contre un montage par chassage est choisi, il sera très difficile d'usiner les parties mâles et femelles avec une précision adéquate, car le moindre écart en termes de taille aura des conséquences très néfastes soit en termes de facilité d'assemblage, soit en termes de force de maintien: un gros écart de cotes entre les parties mâles et femelles pourra soit nécessiter l'exercice d'une force très importante pour introduire la partie mâle dans la partie femelle d'assemblage, risquant ainsi d'endommager parallèlement le mouvement, soit, si cette force d'introduction est trop faible, elle ne permettra pas de faire passer la tige d'une position axiale à une autre, comme par exemple celle correspondant au remontage de la montre à celle de la remise à l'heure, sans risque d'arracher la partie de la tige solidaire de la couronne. Par ailleurs, plus spécifiquement pour des tiges en matière plastique, il est difficile de garantir un maintien durable de l'assemblage des deux parties de la tige en raison du fluage.The coupling between the portion of the rod secured to the movement and that comprising the crown is generally made using elements male and female, for example by screwing or by driving. Each of these two mounting methods, however, has drawbacks respectively in terms of cost and reliability of assembly. Indeed, if a screw mounting is preferred, it is necessary to perform the machining operation, performed in the context of the machining of threads and tappings of the rod assembly parts, with extreme precision to guarantee a sufficient tightening torque at the end of the stroke, to maintain the assembled position even in case of shock, vibration or significant thermal variations, which is very expensive. If on the other hand a mounting by driving is chosen, it will be very difficult to machine the parts male and female with an adequate precision, because the smallest difference in terms of size will have very detrimental consequences either in terms of ease of assembly, either in terms of holding force: a large difference in dimensions between the male and female parts may either require the exercise of a very large force to introduce the male part into the female part of assembly, thus risking to damage in parallel the movement, that is, if this insertion force is too weak, it will not allow the rod to be moved from one axial position to another, for example that corresponding to the reassembly of the watch to that of the delivery to the hour, without risk of tearing the part of the rod secured to the crown. Furthermore, more specifically for plastic rods, it is difficult to ensure a sustainable maintenance of the assembly of the two parts of the stem due to creep.

Afin de pallier ces inconvénients, d'autres types de moyens d'assemblage destinés à rendre solidaire en rotation et axialement chacune des parties de tiges ont été proposés, notamment à l'aide de mâchoires élastiques ménagées sur l'une des parties et dans laquelle vient s'engager axialement l'extrémité de l'autre partie. L'usinage de tels éléments d'accouplement demeure toutefois toujours relativement délicat en raison des faibles dimensions de la tige, ce qui affaiblit fortement la pièce et augmente son risque de rupture, et ne permet pas le dégagement de la tige hors de la carrure dans différentes positions axiales correspondants chacune à différents modes de fonctionnement.In order to overcome these drawbacks, other types of assembly means intended to make each of the parts of the stems integral in rotation and axially have been proposed, in particular by means of elastic jaws formed on one of the parts and in which axially engages the end of the other part. The machining of such coupling elements, however, remains relatively difficult because of the small size of the rod, which strongly weakens the part and increases its risk of rupture, and does not allow the release of the rod out of the middle in different axial positions each corresponding to different modes of operation.

Il existe par conséquent un besoin pour une méthode et un dispositif d'assemblage pour des tiges en deux parties exemptes de ces limitations connues.There is therefore a need for a method and an assembly device for two-piece rods free of these known limitations.

RESUME DE L'INVENTIONSUMMARY OF THE INVENTION

A cet effet, la présente invention concerne une méthode pour l'assemblage d'une tige en deux parties d'une pièce d'horlogerie, la tige comprenant une première partie pourvue d'une première extrémité proximale coopérant avec un mouvement, et d'une première extrémité distale de fixation, et une deuxième partie pourvue d'une deuxième extrémité proximale de fixation et d'une deuxième extrémité distale, caractérisée en ce qu'elle contient une étape de soudage ou de collage de la première extrémité distale de fixation de la première partie de la tige à la deuxième extrémité proximale de fixation de ladite deuxième partie de la tige.To this end, the present invention relates to a method for assembling a rod in two parts of a timepiece, the rod comprising a first portion provided with a first proximal end cooperating with a movement, and a first distal end of attachment, and a second portion provided with a second proximal end of attachment and a second distal end, characterized in that it contains a step of welding or bonding the first distal end of attachment of the first portion of the shaft at the second proximal end of attachment of said second portion of the shaft.

L'invention concerne également une tige en deux parties d'une pièce d'horlogerie comprenant une première partie pourvue d'une première extrémité proximale coopérant avec un mouvement, et d'une première extrémité distale de fixation, et une deuxième partie pourvue d'une deuxième extrémité proximale de fixation et d'une deuxième extrémité distale, la première extrémité distale de fixation de la première partie de la tige étant soudée ou collée à la deuxième extrémité proximale de fixation de la deuxième partie de la tige.The invention also relates to a two-part stem of a timepiece comprising a first part provided with a first proximal end cooperating with a movement, and a first distal end of attachment, and a second part provided with a a second proximal end of attachment and a second distal end, the first distal end of attachment of the first portion of the shaft being welded or glued to the second proximal end of attachment of the second portion of the shaft.

Un avantage de la présente invention est de fournir une méthode et un dispositif de fixation plus efficaces, plus sûrs et plus durables pour une tige brisée d'une pièce d'horlogerie. Le risque de rupture notamment lors d'opérations de tirage axial de la couronne par l'utilisateur est quasiment éliminé, et la tige est plus résistante à toutes les autres contraintes d'utilisation normales d'une montre en termes de chocs, de vibrations et de variations thermiques.An advantage of the present invention is to provide a more effective, safe and durable method and fastening device for a broken stem of a timepiece. The risk of rupture, particularly during operations of axial drawing of the crown by the user is almost eliminated, and the rod is more resistant to all other constraints normal use of a watch in terms of shock, vibration and thermal variations.

Un autre avantage de la solution proposée est qu'elle permet de monter plus facilement la partie de la tige hors de la platine, tout en cachant l'endroit de fixation dans la carrure, sans risque d'endommager le mouvement, mais tout en garantissant néanmoins une fixation solide et une meilleure durée de vie.Another advantage of the proposed solution is that it makes it easier to mount the part of the rod out of the plate, while hiding the mounting location in the middle part, without risk of damaging the movement, but while ensuring nevertheless a solid fixation and a better life.

Encore un autre avantage de la solution proposée est de ne pas ralentir le rythme de production, l'opération d'assemblage proposée pouvant être effectuée sur une ligne de production dans un délai sensiblement équivalent à celui correspondant à une opération de vissage ou de chassage.Yet another advantage of the proposed solution is not to slow down the rate of production, the proposed assembly operation can be performed on a production line in a period substantially equivalent to that corresponding to a screwing operation or hunting.

BRÈVE DESCRIPTION DES FIGURESBRIEF DESCRIPTION OF THE FIGURES

D'autres caractéristiques et avantages de l'invention ressortiront plus clairement de la description détaillée et des dessins, donnés à titre d'exemple et à vocation non limitative, dans lesquels:

  • les figures 1A, 1B et 1C montrent des vues respectivement de profil, en coupe et en perspective des deux parties d'une tige selon un mode de réalisation préférentiel de l'invention;
  • les figures 2A et 2B, et 2C montrent des vues respectivement de profil, en coupe et en perspective des deux parties de la tige illustrée aux figures 1A,1B et 1C en position assemblée;
  • la figure 3 montre une vue en perspective d'une tige selon un mode de réalisation préférentiel, accouplée au mouvement et logée dans la platine du mouvement.
Other characteristics and advantages of the invention will emerge more clearly from the detailed description and the drawings, given by way of example and with non-limiting scope, in which:
  • the FIGS. 1A, 1B and 1C show respective views in profile, in section and in perspective of the two parts of a rod according to a preferred embodiment of the invention;
  • the FIGS. 2A and 2B, and 2C show respective views in profile, in section and in perspective of the two parts of the rod illustrated in FIGS. FIGS. 1A, 1B and 1C in assembled position;
  • the figure 3 shows a perspective view of a rod according to a preferred embodiment, coupled to the movement and housed in the plate of the movement.

DESCRIPTION DÉTAILLÉEDETAILED DESCRIPTION

Les figures 1A, 1B et 1C montrent les deux parties d'une tige 10 avant leur assemblage, la figure 1B étant une vue en coupe de la figure 1A selon l'axe A-A. La figure 1A est une vue de profil de chacune de ces parties, la partie gauche constituant une première partie 1 de la tige destinée à être accouplée au mouvement, ici par l'intermédiaire de la roue 13 d'engrenage (mieux visible sur la figure 1C en perspective), tandis que la partie droite constitue une deuxième partie 2 destinée à être manipulée par l'utilisateur, ici par l'intermédiaire d'une couronne 23 agencée à son extrémité. Sur chacune des première partie 1 et deuxième partie 2 de la tige, on dénommera par extrémité proximale celle qui est la plus proche du centre de la montre dans laquelle la tige est destinée à être logée, et respectivement par extrémité distale celle qui est située la plus loin du centre de la montre. On se déplace donc à rayon croissant par rapport au centre de la montre pour aller de l'extrémité proximale à l'extrémité distale.The FIGS. 1A, 1B and 1C show the two parts of a rod 10 before assembly, the Figure 1B being a sectional view of the Figure 1A along the AA axis. The Figure 1A is a side view of each of these parts, the left part constituting a first part 1 of the rod intended to be coupled to the movement, here via the gear wheel 13 (better visible on the figure 1C perspective), while the right part is a second portion 2 to be manipulated by the user, here through a ring 23 arranged at its end. On each of the first part 1 and second part 2 of the rod, the term proximal end is called the one closest to the center of the watch in which the rod is intended to be housed, and respectively by distal end that which is located in the further from the center of the watch. It is therefore moved with increasing radius relative to the center of the watch to go from the proximal end to the distal end.

La tige selon le mode préférentiel de l'invention illustrée par les figures 1A,1B et 1C en position démontée et par les figures 2A,2B,2C est ainsi une tige pour montre, comme par exemple une tige de remontoir pour montre totalement mécanique ou encore une simple tige de mise à l'heure pour une montre à quartz, dont la roue d'engrenage 13 avec le mouvement est agencée au niveau d'une première extrémité proximale 11 de la première partie 1 de la tige, tandis que la couronne 23 de préhension et de manipulation est agencée au niveau d'une deuxième extrémité distale 22 de la deuxième partie 2 de la tige. Une série de cannelures 17 est agencée sur la première partie 1 de la tige pour permettre le positionnement d'un sautoir - non représenté - déterminant différentes positions axiales de la tige. Sur le mode de réalisation illustré, on peut distinguer trois cannelures qui peuvent par exemple correspondre à un mode de fonctionnement courant, un mode de correction rapide de la date et un mode de mise à l'heure. Une rainure 26 peut par ailleurs être agencée sur la deuxième partie 2 de la tige pour y loger typiquement un joint d'étanchéité 5, non représenté sur les figures 1A-C et 2A-C mais visible sur la figure 3.The rod according to the preferred embodiment of the invention illustrated by the FIGS. 1A, 1B and 1C in disassembled position and by FIGS. 2A, 2B, 2C is thus a rod for a watch, such as for example a fully mechanical watch winding stem or a simple time-setting rod for a quartz watch, whose gear wheel 13 with the movement is arranged at the level of a first proximal end 11 of the first portion 1 of the rod, while the ring 23 for gripping and manipulation is arranged at a second distal end 22 of the second portion 2 of the rod. A series of splines 17 is arranged on the first part 1 of the rod to allow the positioning of a jumper - not shown - determining different axial positions of the rod. In the illustrated embodiment, three splines can be distinguished which can for example correspond to a current operating mode, a fast date correction mode and a time setting mode. A groove 26 can moreover be arranged on the second part 2 of the rod to typically accommodate a seal 5, not shown on the Figures 1A-C and 2A-C but visible on the figure 3 .

L'assemblage des premières et deuxièmes parties de la tige est réalisé au niveau de la première extrémité distale 12 de la première partie 1 et de la deuxième extrémité proximale 21 de la deuxième partie 2 de la tige, en introduisant un tenon 25 agencé sur la deuxième partie 2 de la tige dans un trou 16 borgne agencé dans la première extrémité distale 12 de la première partie 1 de la tige. Cette opération d'emboîtage peut s'accompagner ou non d'un léger chassage du tenon 26 dans le trou 16, mais ne nécessite pas de tolérances d'usinage très précises pour la correspondance entre le diamètre du trou 16 et celui du tenon 25, car l'opération de fixation définitive est réalisée lors d'une opération ultérieure de soudage, illustrée notamment par les figures 2A, 2B décrites ci-après.The assembly of the first and second parts of the rod is performed at the first distal end 12 of the first portion 1 and the second proximal end 21 of the second portion 2 of the rod, by introducing a pin 25 arranged on the second portion 2 of the rod in a blind hole 16 arranged in the first distal end 12 of the first portion 1 of the rod. This casing operation may or may not be accompanied by a slight driving of the post 26 in the hole 16, but does not require very precise machining tolerances for the correspondence between the diameter of the hole 16 and that of the post 25, because the final fixing operation is performed during a subsequent welding operation, illustrated in particular by the Figures 2A, 2B described below.

Chacune des parties de la tige contient également des surfaces d'appui, destinées à être amenées en contact l'une avec l'autre avant l'opération de soudage. Ainsi la première partie de la tige 1 comprend une première surface d'appui 14 annulaire entourant le trou 16, et la deuxième partie de la tige 2 comprend une deuxième surface d'appui 24 entourant le tenon 25, référencées sur les figures 1A et 1B. On peut également constater sur ces figures que le diamètre de la première partie 1 de la tige est légèrement inférieur, au niveau de la première extrémité distale 12 de fixation, à celle du corps de cette première partie 1 de la tige. Le rétrécissement du diamètre à ce niveau fait donc apparaître un épaulement 15, dont la fonction est notamment d'éviter la formation de bourrelets proéminents après l'opération de soudage ou de collage 100, d'une part, et d'autre part de pouvoir apposer aisément, grâce à la présence d'une surface de butée axiale fournie par l'épaulement 15, une pince pour retenir la première partie 1 de la tige accouplée au mouvement dans la carrure et ainsi dégager une couronne de travail (non illustrée) avant de monter la deuxième partie 2 de la tige. La fonction de cette couronne de travail sera expliquée plus en détail à l'aide de la figure 3.Each of the parts of the rod also contains bearing surfaces, intended to be brought into contact with each other before the welding operation. Thus the first part of the rod 1 comprises a first annular support surface 14 surrounding the hole 16, and the second part of the rod 2 comprises a second bearing surface 24 surrounding the tenon 25, referenced on the Figures 1A and 1B . It can also be seen in these figures that the diameter of the first portion 1 of the rod is slightly lower, at the first distal end 12 of fixation, to that of the body of this first portion 1 of the rod. The narrowing of the diameter at this level therefore reveals a shoulder 15, the function of which is notably to prevent the formation of prominent flanges after the welding or bonding operation 100, on the one hand, and on the other hand to be able to affix easily, thanks to the presence of an axial abutment surface provided by the shoulder 15, a clamp for retaining the first portion 1 of the rod coupled to the movement in the middle and thus clear a working crown (not shown) before to mount the second part 2 of the rod. The function of this work crown will be explained in more detail using the figure 3 .

Les figures 2A, 2B et 2C montrent des vues identiques à celles des figures 1A,1B et 1C, des premières partie 1 et deuxième partie 2 de la tige 10, mais avec cette fois-ci avec les parties assemblées l'une à l'autre. Ces première partie 1 et deuxième partie 2 ne sont du reste plus référencées que sur la figure 2B, qui est une vue en coupe de la figure 1A selon l'axe B-B. On peut ainsi toujours distinguer la roue d'engrenage 13 au niveau de la première extrémité proximale 11 de la première partie 1, et la série de cannelures 17, mais plus les surfaces d'appui respectives de chacune des parties de la tige 10 lorsque celle-ci a été montée suite à l'opération d'emboîtage 200 du tenon 25 de la deuxième partie 2 dans le trou 16 de la première partie 1. On comprendra qu'en lieu et place du trou et du tenon, d'autres types d'éléments mâles et/ou femelles peuvent être envisagés pour assembler chacune des parties de la tige, sans les fixer définitivement. L'opération de fixation définitive et irréversible est réalisée grâce à l'étape de soudage ou de collage 100, de préférence un soudage laser pour des raisons d'efficacité et de productivité. Un soudage par ultrason est toutefois également envisageable ainsi qu'un collage. L'avantage du soudage laser par rapport au soudage ultrason est qu'il ne génère aucune vibration mécanique potentiellement néfaste sur des pièces d'aussi petite taille; le collage présente l'avantage de ne générer aucune élévation de température lors de l'opération d'assemblage mais affecte par contre la productivité en raison du temps requis pour la polymérisation de la colle. Cette étape de soudage ou de collage 100 solidarise mutuellement la première surface d'appui 14 annulaire à la deuxième surface d'appui 24 annulaire et supprime ainsi définitivement et de manière irréversible tout degré de liberté relatif en translation et en rotation de la deuxième partie 2 de la tige par rapport à la première partie 1 de la tige 10. Un avantage de la méthode de fixation proposée entre les deux parties de la tige est qu'elle ne nécessite, outre des tolérances d'usinage moins contraignantes par rapport à un mode de fixation par vissage ou par chassage, pas un contact effectif entre les deux surfaces d'appui de chacune des parties de la tige. Pour des tiges de diamètre compris entre 1,5mm et 2,5mm, et d'une longueur comprise entre 15mm et 25mm comme dans le cadre de la présente invention, un écart mutuel entre les surfaces d'appui allant jusqu'à 0.1 mm peut être toléré et rattrapé grâce à la fonte des pièces, réalisées de préférence en métal ou en plastique. Les paramètres de réglage du laser en termes de puissance et de fréquence peuvent dans ce cas adaptés à la nature du matériau.The FIGS. 2A, 2B and 2C show views identical to those of FIGS. 1A, 1B and 1C , first part 1 and second part 2 of the rod 10, but this time with the parts joined to each other. These first part 1 and second part 2 are moreover referenced only on the Figure 2B which is a sectional view of the Figure 1A along the BB axis. It is thus always possible to distinguish the gear wheel 13 at the first proximal end 11 of the first part 1, and the series of splines 17, but the respective bearing surfaces of each of the parts of the rod 10 when the it was mounted following the casing operation 200 of the post 25 of the second part 2 in the hole 16 of the first part 1. It will be understood that in place of the hole and the post, other types male and / or female elements can be envisaged to assemble each of the parts of the rod, without fixing them definitively. The definitive and irreversible fixation operation is carried out thanks to the welding or bonding step 100, preferably a laser welding for reasons of efficiency and productivity. Ultrasonic welding is however also possible as well as a bonding. The advantage of laser welding over ultrasonic welding is that it generates no potentially harmful mechanical vibration on such small parts; the bonding has the advantage of not generating any temperature rise during the assembly operation but affects the productivity against because of the time required for the polymerization of the glue. This welding or bonding step 100 mutually secures the first annular support surface 14 to the second annular support surface 24 and thus definitively and irreversibly removes any relative degree of freedom in translation and in rotation of the second part 2 of the rod relative to the first part 1 of the rod 10. An advantage of the fastening method proposed between the two parts of the rod is that it requires, in addition to machining tolerances less restrictive compared to a mode fastening by screwing or by driving, not an actual contact between the two bearing surfaces of each of the parts of the rod. For rods of diameter between 1.5mm and 2.5mm, and of a length between 15mm and 25mm as in the context of the present invention, a mutual gap between the bearing surfaces of up to 0.1 mm can be tolerated and caught by melting parts, preferably made of metal or plastic. The laser control parameters in terms of power and frequency can in this case be adapted to the nature of the material.

L'opération de soudage est de préférence réalisée à l'aide d'un laser fonctionnant avec un conduit de lumière à 200 micromètres, d'une puissance de 250W, et travaillant à une fréquence de 15Hz. L'étape de soudage ou de collage 100 comprend de préférence la pose d'un premier point de soudage ou de colle pour solidariser la première partie 1 de la tige à la deuxième partie 2 de la tige. Ensuite, la deuxième partie 2 de la tige est entraînée en rotation autour de son axe, par exemple à l'aide d'un outil de préhension agissant sur la couronne 23 à une vitesse angulaire de préférence égale à un demi-tour par seconde, de telle sorte que 30 points de soudure ou de colle soient formés sur toute la périphérie du diamètre de la tige, formant ainsi une liaison quasi-continue sur l'intégralité du pourtour des surfaces d'appui de chacune des parties de la tige.The welding operation is preferably performed using a laser operating with a light pipe at 200 micrometers, a power of 250W, and working at a frequency of 15Hz. The welding or bonding step 100 preferably comprises the laying of a first welding point or glue for securing the first portion 1 of the rod to the second portion 2 of the rod. Then, the second portion 2 of the rod is rotated about its axis, for example by means of a gripping tool acting on the ring 23 at an angular speed preferably equal to half a turn per second, such that 30 solder or glue points are formed over the entire periphery of the diameter of the rod, thereby forming a quasi-continuous connection over the entire periphery of the bearing surfaces of each of the parts of the rod.

La figure 3 illustre une tige selon un mode de réalisation préférentiel dont les deux parties sont solidarisées par une opération de soudage ou de collage 100, de préférence un soudage laser réalisé alors que la première partie 1 de la tige est accouplée à un mouvement 4. L'opération d'emboîtage 200 préliminaire est dans ce cas également réalisée alors que la première partie 1 de la tige a été montée dans la platine 3 du mouvement 4, elle-même emboîtée dans une carrure de montre (non représentée).The figure 3 illustrates a rod according to a preferred embodiment, the two parts are secured by a welding or bonding operation 100, preferably a laser welding performed while the first part 1 of the rod is coupled to a movement 4. The operation preliminary casing 200 is in this case also performed while the first part 1 of the rod has been mounted in the plate 3 of the movement 4, itself nested in a middle watch (not shown).

On distingue toujours, sur la première partie 1 de la tige, les cannelures 17 déterminant les positions axiales discrètes de fonctionnement de la tige, mais désormais également une portion saillante 18 hors de la platine 3, cette portion saillante demeurant malgré tout de préférence à l'intérieur d'une carrure de montre, non représentée pour des raisons la lisibilité, et ce afin de toujours cacher le mode de fixation ainsi que les parties soudées ou collées depuis l'extérieur du boîtier pour des raisons esthétiques, comme pour les tiges brisées conventionnelles. Sur la deuxième partie 2 de la tige, on distingue un joint 5 d'étanchéité logé de préférence dans une rainure, ainsi que la couronne 23 de préhension pour les manipulations effectuées par l'utilisateur. Selon un mode de réalisation préférentiel choisi pour le montage et la fixation de la tige 10, l'opération de soudage pour la fixation mutuelle de la première et de la deuxième partie de la tige 10 est effectuée alors que la première partie 1 de la tige a non seulement été préalablement accouplée au mouvement 4 après avoir été introduite dans un orifice 31 de la platine 3 et un autre trou traversant de la carrure, après que la platine 3 et le mouvement 4 ont eux-mêmes déjà été emboîtés dans la carrure, mais également testée dans ses différentes positions axiales de fonctionnement à l'aide d'une tige/couronne de travail - non représentée - qui est ensuite désolidarisée de la première partie 1 de la tige à l'aide d'une pince apposée sur l'épaulement (non référencé sur cette figure, mais mieux visible sur les figures 1A-1B) qui permet de retenir axialement la première partie 1 de la tige lors du retrait de cette couronne de travail. Bien qu'une portion 18 de la première partie 1 de la tige, d'une longueur supérieure à celle de l'épaulement, soit nécessairement saillante hors de la platine 3 pour permettre de pouvoir apposer des pinces de maintien (non représentées également) lors de l'opération de retrait de cette couronne de travail, il est également nécessaire, pour cette opération intermédiaire, de prévoir un dégagement 32 dans la platine 3 pour l'apposition des pinces de maintien pour que ces dernières puissent arriver jusqu'en butée sur l'épaulement 15 de la première partie 1 de la tige, sans venir préalablement en butée contre une partie externe de la platine 3. Un tel dégagement 32 au niveau de l'orifice 31 de la platine 3 permet par ailleurs de réduire la longueur de la première partie 1 de la tige et donc de réduire la portion saillante 18 hors de la platine, et donc de minimiser l'espace libre entre la platine 3 et la carrure dans laquelle cette dernière est emboitée.One always distinguishes, on the first part 1 of the rod, the splines 17 determining the discrete axial positions of operation of the rod, but henceforth also a projecting portion 18 out of the plate 3, this protruding portion still remaining preferably inside a watch case, not shown for reasons of legibility, and this in order to always hide the method of attachment and the parts welded or glued from the outside of the case for aesthetic reasons, as for conventional broken rods. On the second part 2 of the rod, there is a seal 5 housed preferably in a groove, and the ring 23 gripping for manipulations performed by the user. According to a preferred embodiment chosen for mounting and fixing the rod 10, the welding operation for the mutual attachment of the first and the second part of the rod 10 is performed while the first part 1 of the rod has not only been previously coupled to the movement 4 after being introduced into an orifice 31 of the plate 3 and another through hole of the middle, after the plate 3 and the movement 4 have themselves already been nested in the middle part, but also tested in its various axial operating positions using a rod / working ring - not shown - which is then detached from the first part 1 of the rod with a clamp affixed to the shoulder (not referenced in this figure, but better visible on the Figures 1A-1B ) which allows to retain axially the first part 1 of the rod during removal of the working crown. Although a portion 18 of the first portion 1 of the rod, a length greater than that of the shoulder, is necessarily projecting out of the plate 3 to allow to be able to affix holding clamps (not shown also) when the operation of withdrawal of the working crown, it is also necessary, for this intermediate operation, to provide a clearance 32 in the plate 3 for the apposition of the holding clamps so that they can reach the stop on the shoulder 15 of the first part 1 of the rod, without previously abutting against an outer portion of the plate 3. Such clearance 32 at the orifice 31 of the plate 3 also reduces the length of the first part 1 of the rod and thus reduce the projecting portion 18 out of the plate, and thus minimize the free space between the plate 3 and the middle part in which the latter is engaged.

Bien que la tige correspondant au mode de réalisation préférentiel illustré par les figures précédemment décrites comporte un simple épaulement 15 (voir figures 1A-1C notamment) au niveau de son extrémité de fixation, on pourra, selon un mode de réalisation alternatif non illustré, réaliser une gorge complète au niveau de la première extrémité distale 12 de fixation, une telle gorge comprenant une surface de retenue additionnelle utile pour la manipulation axiale de la tige lors de tests de fonctionnement préliminaires avant l'opération de soudage ou de collage proprement dite. Toutefois, cette commodité d'usage en termes de manipulation rendrait néanmoins parallèlement une opération de soudage plus délicate à réaliser en raison de la faible épaisseur qui en résulte, pour une taille donnée de la première partie de tige, du rebord entre la nouvelle butée axiale et la première surface d'appui 14 destinée à être soudée.Although the rod corresponding to the preferred embodiment illustrated by the previously described figures comprises a simple shoulder 15 (see Figures 1A-1C in particular) at its fixing end, it will be possible, in a non-illustrated alternative embodiment, to make a complete groove at the first distal end 12 of fixation, such groove comprising an additional retaining surface useful for handling Axial of the rod during preliminary operational tests before the actual welding or bonding operation. However, this ease of use in terms of handling would nevertheless make parallel welding operation more difficult to achieve because of the small thickness resulting, for a given size of the first portion of the rod, the rim between the new axial stop and the first bearing surface 14 to be welded.

On pourra noter que, dans le cadre de l'invention, la fixation des deux parties de la tige est de préférence toujours effectuée en dehors de la platine, en raison de l'opération de soudage ou de collage 100 réalisée au niveau de la première extrémité distale 12 de fixation de la première partie 1 de la tige, et qui ne doit pas altérer d'autres éléments du mouvement 4. Un tel agencement d'une portion saillante 18 pourrait également s'étendre jusqu'en dehors de la carrure, ce qui présenterait toutefois l'inconvénient de ne plus masquer le mode d'assemblage ni les parties soudées ou collées.It may be noted that, in the context of the invention, the fixing of the two parts of the rod is preferably always carried out outside the plate, because of the welding or bonding operation 100 carried out at the level of the first distal end 12 of attachment of the first part 1 of the rod, and which must not alter other elements of the movement 4. Such an arrangement of a protruding portion 18 could also extend to outside the middle part, However, this would have the disadvantage of no longer hide the assembly mode or welded or glued parts.

Bien que la tige décrite corresponde à une tige de remontoir ou de mise à l'heure selon le mode de réalisation préférentiel illustré, qui s'applique aussi bien à une montre mécanique qu'une montre à quartz, on comprendra que la méthode de fixation décrite s'applique à d'autres types de tiges pour pièce d'horlogerie sans sortir du cadre de la présente invention. On comprendra également que non seulement le soudage laser ou par ultrason envisageable comme technique pour solidariser mutuellement définitivement et de manière irréversible les deux parties de la tige, mais également d'autres types de soudage thermiques, ainsi que le brasage.Although the rod described corresponds to a winding or setting rod according to the preferred embodiment illustrated, which applies to both a mechanical watch and a quartz watch, it will be understood that the fixing method described applies to other types of rods for timepiece without departing from the scope of the present invention. It will also be understood that not only can laser or ultrasonic welding be envisaged as a technique for permanently and irreversibly mutually securing the two parts of the rod, but also other types of thermal welding, as well as brazing.

Claims (9)

Méthode pour l'assemblage d'une tige (10) en deux parties d'une pièce d'horlogerie, ladite tige (10) comprenant une première partie (1) pourvue d'une première extrémité proximale (11) coopérant avec un mouvement, et d'une première extrémité distale de fixation (12), et une deuxième partie (2) pourvue d'une deuxième extrémité proximale (21) de fixation et d'une deuxième extrémité distale (22), caractérisée en ce qu'elle contient une étape de soudage ou de collage (100) de ladite première extrémité distale (12) de fixation de ladite première partie (1) de ladite tige (10) à ladite deuxième extrémité proximale (21) de fixation de ladite deuxième partie (2) de ladite tige (10).A method for assembling a rod (10) in two parts of a timepiece, said rod (10) comprising a first portion (1) provided with a proximal first end (11) cooperating with a movement, and a first distal attachment end (12) and a second part (2) provided with a second proximal end (21) for fixing and a second distal end (22), characterized in that it contains a step of welding or bonding (100) said first distal end (12) for fixing said first portion (1) of said rod (10) to said second proximal end (21) for fixing said second portion (2) of said rod (10). Méthode pour l'assemblage d'une tige (10) en deux parties d'une pièce d'horlogerie selon la revendication 1, caractérisée en ce que ladite étape de soudage ou de collage (100) est réalisée après une étape d'emboîtage (200) préliminaire d'un élément mâle d'assemblage agencé au niveau de ladite deuxième extrémité proximale de fixation (21) de ladite première partie (2) dans un élément femelle d'assemblage agencé au niveau de ladite première extrémité distale (12) de fixation de ladite première partie (1).Method for assembling a two-piece stem (10) of a timepiece according to claim 1, characterized in that said welding or gluing step (100) is performed after a fitting step ( 200) of a male connecting member arranged at said second proximal fastening end (21) of said first portion (2) in a female connecting member arranged at said first distal end (12) of fixing said first part (1). Méthode pour l'assemblage d'une tige en deux parties d'une pièce d'horlogerie selon la revendication 2, lesdites première extrémité distale de fixation (12) de ladite première partie (1) et deuxième extrémité proximale de fixation (21) de ladite première partie (2) présentant respectivement une première surface d'appui (14) annulaire et une deuxième surface d'appui annulaire (24) annulaire distantes d'au maximum 0.1 mm après ladite étape d'emboîtage (200) préliminaire.A method for assembling a two-part stem of a timepiece according to claim 2, said first distal end of attachment (12) of said first portion (1) and second proximal fastening end (21) of said first portion (2) having respectively a first annular bearing surface (14) and a second annular bearing surface (24) at a distance of not more than 0.1 mm after said preliminary casing step (200). Méthode pour l'assemblage d'une tige en deux parties d'une pièce d'horlogerie selon la revendication 2 ou 3, caractérisée en ce que ladite étape de soudage ou de collage (100) est réalisée au niveau d'un dégagement (31) dans la platine (3) du mouvement (4), ladite première extrémité distale de fixation (12) comportant une partie saillante (18) hors de ladite platine (3).Method for assembling a two-piece stem of a timepiece according to claim 2 or 3, characterized in that said step of welding or gluing (100) is performed at a clearance (31) in the plate (3) of the movement (4), said first distal fixing end (12) having a projection (18) out of said plate (3). Méthode pour l'assemblage d'une tige en deux parties d'une pièce d'horlogerie selon l'une des revendications précédentes, caractérisée en ce que ladite étape de soudage ou de collage (100) comprend la pose d'un premier point de soudage ou de colle puis la rotation de ladite deuxième partie (2) de ladite tige à l'aide d'un outil pour la pose d'autres points de soudage ou de colle.Method for the assembly of a rod in two parts of a timepiece according to one of the preceding claims, characterized in that said step of welding or bonding (100) includes placing a first point of welding or glue then rotating said second portion (2) of said rod with a tool for laying other welding points or glue. Tige (10) en deux parties d'une pièce d'horlogerie comprenant une première partie (1) pourvue d'une première extrémité proximale (11) coopérant avec un mouvement, et d'une première extrémité distale de fixation (12), et une deuxième partie (2) pourvue d'une deuxième extrémité proximale (21) de fixation et d'une deuxième extrémité distale (22), ladite première extrémité distale (12) de fixation de ladite première partie (1) de ladite tige (10) étant soudée ou collée à ladite deuxième extrémité proximale (21) de fixation de ladite deuxième partie (2) de ladite tige (10).A two piece halftone rod (10) comprising a first portion (1) having a proximal first end (11) cooperating with movement, and a first distal end (12) for attachment, and a second portion (2) provided with a second proximal end (21) for attachment and a second distal end (22), said first distal end (12) for securing said first portion (1) of said rod (10); ) being welded or glued to said second proximal end (21) for fixing said second portion (2) of said rod (10). Tige (10) selon la revendication 5, caractérisée en ce que lesdites premières et deuxièmes parties (1,2) de ladite tige (10) sont en métal.Rod (10) according to claim 5, characterized in that said first and second parts (1,2) of said rod (10) are metal. Tige (10) selon la revendication 5 ou 6, caractérisée en ce qu'elle forme une tige de remontoir ou de mise à l'heure pour pièce d'horlogerie, une roue d'engrenage (13) étant agencée sur ladite première extrémité proximale (11) de ladite première partie (1) de ladite tige (10), et une couronne (23) de préhension étant formée sur ladite deuxième extrémité distale (22) de ladite deuxième partie (2) de ladite tige (10).Rod (10) according to claim 5 or 6, characterized in that it forms a winding or time-setting rod for a timepiece, a gear wheel (13) being arranged on said first proximal end (11) of said first portion (1) of said shank (10), and a shank (23) being formed on said second distal end (22) of said second portion (2) of said shank (10). Tige (10) selon l'une des revendications 5 à 7, caractérisée en ce qu'un épaulement (15) est agencé au niveau de la première extrémité distale (12) de fixation de ladite première partie (1) de ladite tige (10).Rod (10) according to one of claims 5 to 7, characterized in that a shoulder (15) is arranged at the first distal end (12) for fixing said first portion (1) of said rod (10). ).
EP13164992.3A 2013-04-23 2013-04-23 Divided stem and related assembly method Active EP2796939B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170139376A1 (en) * 2014-06-03 2017-05-18 The Swatch Group Research And Development Ltd Component of external parts for a timepiece made of welded materials
CN109128854A (en) * 2018-11-13 2019-01-04 珠海罗西尼表业有限公司 Wrist-watch arbor assembly system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5769271A (en) * 1980-10-20 1982-04-27 Seiko Epson Corp Joining of crown and winding stem for wrist watch
FR2779244A1 (en) * 1998-05-28 1999-12-03 Cheval Freres Sa Procedure for assembling the winder of a watch comprising the shaft and the winder button
EP2579103A2 (en) * 2011-10-03 2013-04-10 Guenat SA Montres Valgine Control device for clockwork

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5769271A (en) * 1980-10-20 1982-04-27 Seiko Epson Corp Joining of crown and winding stem for wrist watch
FR2779244A1 (en) * 1998-05-28 1999-12-03 Cheval Freres Sa Procedure for assembling the winder of a watch comprising the shaft and the winder button
EP2579103A2 (en) * 2011-10-03 2013-04-10 Guenat SA Montres Valgine Control device for clockwork

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170139376A1 (en) * 2014-06-03 2017-05-18 The Swatch Group Research And Development Ltd Component of external parts for a timepiece made of welded materials
CN109128854A (en) * 2018-11-13 2019-01-04 珠海罗西尼表业有限公司 Wrist-watch arbor assembly system

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