EP2437125A1 - Timepiece - Google Patents

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Publication number
EP2437125A1
EP2437125A1 EP11405329A EP11405329A EP2437125A1 EP 2437125 A1 EP2437125 A1 EP 2437125A1 EP 11405329 A EP11405329 A EP 11405329A EP 11405329 A EP11405329 A EP 11405329A EP 2437125 A1 EP2437125 A1 EP 2437125A1
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EP
European Patent Office
Prior art keywords
movement according
barrel
movement
disks
thickness
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Granted
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EP11405329A
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German (de)
French (fr)
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EP2437125B1 (en
Inventor
Elio Mariotto
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Rolex SA
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Rolex SA
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Priority to EP11405329.1A priority Critical patent/EP2437125B1/en
Publication of EP2437125A1 publication Critical patent/EP2437125A1/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
    • G04B1/00—Driving mechanisms
    • G04B1/10—Driving mechanisms with mainspring
    • G04B1/16—Barrels; Arbors; Barrel axles
    • 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
    • G04B33/00—Calibers
    • G04B33/06—Calibers of extremely flat shape

Definitions

  • the present invention relates to a watch movement of diameter less than 40 mm which comprises a barrel for housing a motor spring and whose diameter is smaller than the radius of said movement.
  • This barrel has a cylindrical side wall surrounded by toothing. Each edge of this cylindrical side wall is closed by a disk axially traversed by a pivot opening of a barrel shaft.
  • the invention also relates to a timepiece comprising such a movement.
  • the documents FR 1220417 and EP 1837717 describe in detail the construction of barrels for wristwatches.
  • the barrel drum can be machined from a workpiece comprising the bottom and the cylindrical sidewall.
  • the walls of the drum and its cover are of comparable thicknesses. This follows in particular from the fact that the device aims to bring together the drum and its lid so as to obtain a connection that withstands high pressures.
  • the invention described in the second document proposes a fixing of the cover on the drum which does not modify, neither the external dimensions of the cylinder, nor its internal volume.
  • a major feature of mechanical watches is the power reserve.
  • a watch the size of a wristwatch, it follows a problem of storing in the drive member the largest amount of energy possible in a small volume.
  • such watches naturally have limited dimensions so that it no longer possible to increase the size of the barrel whose size is defined by the maximum space that can be reserved for it within the movement .
  • the diameter of the movement generally does not exceed 40 mm. Since the axis of rotation of the hands of the watch is most generally at the center of the movement, the diameter of the barrel is necessarily less than the radius of the movement.
  • the object of the present invention is a barrel which offers a greater power reserve than a conventional barrel of the same size.
  • the subject of the invention is a watch movement according to claim 1.
  • this object is achieved by maximizing the useful height at disposal of the mainspring for a cylinder of given height.
  • the latter is indeed directly conditioned, among other things, by the height of the ribbon forming the spring.
  • the increase in the height reserved for the spring within the barrel is obtained by reducing the thickness of the walls, in particular the thickness of at least one of the two disks forming the bottom and the lid of the barrel.
  • An advantage of the invention is to allow substantially increase the power reserve without increasing the size of the barrel.
  • FIG. 1 it represents a timepiece, especially its movement.
  • the latter comprises a cylinder 1, a finishing train 10, an exhaust 11 and a regulator 12.
  • the barrel 1 consists of a thin cylindrical box whose inner housing is intended to receive a motor spring (not shown). At its periphery, this barrel has a toothing 3 intended to drive the finishing train 10.
  • the barrel is formed of three distinct parts, namely a cylindrical side wall 2 surrounded by the toothing 3, and two discs 4, 4 ', 1 one acting as a lid and the other acting as a bottom. These two discs are intended to close the space delimited by the cylindrical side wall 2, each bearing on one of the two edges 21, 21 'of this wall.
  • the disks are supported on a circular bearing surface 22, 22 'provided on the edge of the wall. So and as best illustrated at the figure 2b , the outer surface of each disk can advantageously come flush with the edge 21, 21 '.
  • Each disc 4, 4 ' has an axial opening 5, 5' for the passage of a barrel shaft 7 whose longitudinal axis 8 is perpendicular to the plane of the discs.
  • Each axial opening 5, 5 ' is lined with an annular projection 6, 6' serving as a bearing for the shaft 7.
  • the height of the housing that this barrel reserves for the mainspring is between 85% and 97% of the total height of the cylinder, namely the distance that separates the outer faces of the two discs 4, 4 'at the periphery of the barrel, therefore without taking into account any extra thicknesses of the outer surfaces of the discs close to the axis.
  • at least one of the discs 4, 4 'must have a thickness substantially less than that known from the prior art.
  • the thickness of the bottom or the cover of a drum drum of comparable size is typically of the order of 0.2 mm.
  • Such a value makes it possible to obtain a comfortable autonomy of 67 hours, compared to the 55 hours that until now had offered the same watch equipped with a standard cylinder of the same size.
  • the power reserve gain is 27% which corresponds to a battery life of 70%. hours. If the two discs 4, 4 'have a thickness of 0.05 mm (housing height of 93%), this gain is increased to 31% and the autonomy to 72 hours.
  • At least one of the discs 4, 4 ' is a thinned disc which has a thickness of less than 0.2 mm, preferably a thickness of between 0.04 mm and 0.12 mm.
  • this thickness of at least one of the disks 4, 4 ' is therefore less than or equal to 0.12 mm, or even less than or equal to 0.10 mm, or even less than or equal to 0.09 mm, or even less than or equal to 0.08 mm.
  • the first difficulty lies in obtaining highly thinned discs which therefore have a very small thickness, typically less than 0.08 mm, for example of the order of 0.04 mm only. Below this first value, it becomes almost impossible to obtain a quality part from a mechanical machining.
  • materials such as ceramics, obtained by sintering, ruby, or Phynox ®, metal alloy with high cobalt performance is stainless, has a high mechanical strength and allows obtain the aforementioned discs by stamping, or Toughmet ® or Pfinodal ® , which are copper-based spinodal alloys with addition of nickel and tin. It is also possible to use materials that can be shaped by microfabrication processes such as electroforming (for example, Ni, NiP, NiCo alloys obtained by a LIGA type process, abbreviation of "Lithography, Galvanoformung, Abformung”). or deep etching (for example, silicon, quartz or diamond by a process of the DRIE type, abbreviation of "Deep Reactive Ion Etching").
  • electroforming for example, Ni, NiP, NiCo alloys obtained by a LIGA type process, abbreviation of "Lithography, Galvanoformung, Abformung”
  • deep etching for example, silicon,
  • the second difficulty which arises from the first, lies in the machining of the annular projection 6, 6 'which, to provide a suitable pivoting of the barrel 1 relative to the shaft 7, becomes all the more necessary that the the thickness of the disk with which it is associated is fine.
  • the annular projection 6, 6 ' can be attached to the surface of the disc 4, 4' after having been machined apart.
  • this annular projection can advantageously be made of a material different from that of the disk. This allows to choose a material for the projection which offers good tribological characteristics to optimize the pivoting, but which is not necessarily adapted to the realization of the disc.
  • this projection preference will be given to the production of this projection the use of conventional alloys such as CuBe or brass, or a metal such as nickel which prevents galling while having excellent wear resistance.
  • the assembly of the annular projection on the disc can be obtained by welding, riveting, brazing or gluing.
  • the support of the disc 4, 4 'on the annular projection is via a circular bearing 62, 62' which, in particular, protects the edge of the axial opening 5 located in close proximity of the barrel shaft.
  • this illustrates a variant of the barrel according to the invention.
  • the annular projection 6, 6 ' is not necessarily related to the disk 4, 4' but may be formed integrally with the disk with which it is associated.
  • it may be the same for the toothing 3 which is or is formed in an extra thickness of the periphery of the disc.
  • one of the discs 4, 4 ', in this case the disc 4 can be formed in one piece with the cylindrical side wall 2.
  • the interlocking of the two parts thus formed the barrel may for example be constituted by the inner face of a shoulder 9 in which is formed the toothing 3 and a bearing formed in the edge of the circular side wall 2, as shown in FIG. figure 3 .
  • the two parts can be bonded to each other by gluing or welding during assembly and closing of the barrel, as can also be the discs 4, 4 'of the figure 2 .
  • We can also achieve such an assembly by driving, riveting or clipping.
  • Such a method of attachment which makes at least one of the disks integral with the cylindrical wall, improves the rigidity of the barrel.
  • the circular wall 2 serving in particular as anchor point for the outer end of the mainspring and sliding surface in the case of a sliding-flange spring, retains its normal thickness which provides the rigidity needed to hold the entire barrel.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Gears, Cams (AREA)

Abstract

The movement has a barrel (1) for a housing of a mainspring whose diameter is less than radius of movement. The barrel has a cylindrical sidewall (2) surrounded by teeth (3). The sidewall has edges closed by disks (4, 4'), where each disk has an axial opening for passage of arbor (7). Height of the housing ranges between 85 percentage and 97 percentage of total height at periphery of the barrel. One of the disks has thickness ranging between 0.04 and 0.12 mm. The opening is encircled by annular projection (6) connected to a surface of the disk that is formed from silicon, quartz and diamond.

Description

La présente invention se rapporte à un mouvement d'horlogerie de diamètre inférieur à 40 mm qui comporte un barillet pour le logement d'un ressort moteur et dont le diamètre est inférieur au rayon dudit mouvement. Ce barillet comporte une paroi latérale cylindrique entourée d'une denture. Chaque bord de cette paroi latérale cylindrique est fermé par un disque traversé axialement d'une ouverture de pivotement d'un arbre de barillet. L'invention se rapporte aussi à une pièce d'horlogerie comprenant un tel mouvement.The present invention relates to a watch movement of diameter less than 40 mm which comprises a barrel for housing a motor spring and whose diameter is smaller than the radius of said movement. This barrel has a cylindrical side wall surrounded by toothing. Each edge of this cylindrical side wall is closed by a disk axially traversed by a pivot opening of a barrel shaft. The invention also relates to a timepiece comprising such a movement.

Dans une montre mécanique, toute l'énergie nécessaire au fonctionnement des rouages du mouvement est fournie par la détente progressive du ressort du barillet. Ce ressort se présente sous la forme d'un ruban enroulé en spirale. Après remontage, il est armé entre ses deux extrémités dont l'une est retenue par la paroi latérale du barillet et l'autre par l'arbre du barillet. L'énergie du ressort est transmise au rouage de finissage par la denture du barillet.In a mechanical watch, all the energy necessary for the operation of the wheels of the movement is provided by the progressive relaxation of the spring of the barrel. This spring is in the form of a ribbon spiral wound. After reassembly, it is armed between its two ends, one of which is retained by the side wall of the barrel and the other by the shaft of the barrel. The energy of the spring is transmitted to the gear train by the toothing of the barrel.

Les documents FR 1220417 et EP 1837717 décrivent en détail la construction de barillets pour montres-bracelets. Tel qu'illustré dans ces publications, le tambour de barillet peut être usiné d'une pièce comprenant le fond et la paroi latérale cylindrique. Selon les illustrations données dans le premier document, les parois du tambour et de son couvercle sont d'épaisseurs tout à fait comparables. Ceci découle notamment du fait que le dispositif vise à réunir le tambour et son couvercle de manière à obtenir une liaison qui résiste à de fortes pressions. L'invention décrite dans le second document propose une fixation du couvercle sur le tambour qui ne modifie, ni l'encombrement extérieur du barillet, ni son volume intérieur.The documents FR 1220417 and EP 1837717 describe in detail the construction of barrels for wristwatches. As illustrated in these publications, the barrel drum can be machined from a workpiece comprising the bottom and the cylindrical sidewall. According to the illustrations given in the first document, the walls of the drum and its cover are of comparable thicknesses. This follows in particular from the fact that the device aims to bring together the drum and its lid so as to obtain a connection that withstands high pressures. The invention described in the second document proposes a fixing of the cover on the drum which does not modify, neither the external dimensions of the cylinder, nor its internal volume.

Pour pouvoir usiner dans de bonnes conditions un tambour de barillet d'un seul tenant qui offre une tenue mécanique adéquate, il est nécessaire de prévoir des parois d'une épaisseur typiquement de 0.2 mm.In order to be able to machine in good conditions a one-piece drum drum that provides adequate mechanical strength, it is necessary to provide walls typically of 0.2 mm thick.

Une caractéristique majeure des montres mécaniques est la réserve de marche. Pour une montre de la grandeur d'une montre-bracelet, il en découle un problème consistant à emmagasiner dans l'organe moteur la plus grande quantité d'énergie possible dans un faible volume. En raison de leur usage, de telles montres présentent naturellement des dimensions limitées de sorte qu'il ne devient plus possible d'augmenter la grandeur du barillet dont l'encombrement est défini par l'espace maximum qui peut lui être réservé au sein du mouvement. Pour de telles montres, le diamètre du mouvement n'excède généralement pas 40 mm. Comme l'axe de rotation des aiguilles de la montre se trouve le plus généralement au centre du mouvement, le diamètre du barillet est de ce fait nécessairement inférieur au rayon du mouvement.A major feature of mechanical watches is the power reserve. For a watch the size of a wristwatch, it follows a problem of storing in the drive member the largest amount of energy possible in a small volume. Because of their use, such watches naturally have limited dimensions so that it no longer possible to increase the size of the barrel whose size is defined by the maximum space that can be reserved for it within the movement . For such watches, the diameter of the movement generally does not exceed 40 mm. Since the axis of rotation of the hands of the watch is most generally at the center of the movement, the diameter of the barrel is necessarily less than the radius of the movement.

Le but de la présente invention est un barillet qui offre une plus grande réserve de marche qu'un barillet conventionnel de même encombrement.The object of the present invention is a barrel which offers a greater power reserve than a conventional barrel of the same size.

A cet effet, l'invention a pour objet un mouvement d'horlogerie selon la revendication 1.For this purpose, the subject of the invention is a watch movement according to claim 1.

Selon l'invention, ce but est atteint en maximisant la hauteur utile à disposition du ressort de barillet pour un barillet de hauteur donnée. Plus la proportion de hauteur utile à disposition du ressort est élevée, plus grande sera la réserve de marche du mouvement. Cette dernière est en effet directement conditionnée, entre autres, par la hauteur du ruban formant le ressort. Selon la présente invention, l'augmentation de la hauteur réservée au ressort au sein du barillet est obtenue en réduisant les épaisseurs des parois, en particulier l'épaisseur d'au moins un des deux disques formant le fond et le couvercle du barillet.According to the invention, this object is achieved by maximizing the useful height at disposal of the mainspring for a cylinder of given height. The higher the proportion of useful height at the disposal of the spring, the greater will be the power reserve of the movement. The latter is indeed directly conditioned, among other things, by the height of the ribbon forming the spring. According to the present invention, the increase in the height reserved for the spring within the barrel is obtained by reducing the thickness of the walls, in particular the thickness of at least one of the two disks forming the bottom and the lid of the barrel.

Un avantage de l'invention est de permettre d'augmenter sensiblement la réserve de marche sans accroître l'encombrement du barillet.An advantage of the invention is to allow substantially increase the power reserve without increasing the size of the barrel.

D'autres avantages et spécificités apparaîtront à la lumière de la description détaillée qui va suivre qui présente une forme d'exécution et une variante de l'invention illustrées schématiquement et à titre d'exemple par les figures annexées dans lesquelles:

  • La figure 1 est une vue en plan très schématique d'un mouvement de montre.
  • La figure 2a est une vue éclatée en perspective du barillet de ce mouvement et de son arbre en coupe axiale.
  • La figure 2b correspond à une vue assemblée des éléments illustrés à la figure 2a.
  • La figure 3 est une vue en perspective et en coupe axiale d'une variante du barillet, organe principal de l'objet de l'invention.
Other advantages and specificities will appear in the light of the following detailed description which presents an embodiment and a variant of the invention. illustrated schematically and by way of example by the appended figures in which:
  • The figure 1 is a very schematic plan view of a watch movement.
  • The figure 2a is an exploded perspective view of the barrel of this movement and its shaft in axial section.
  • The figure 2b corresponds to an assembled view of the elements illustrated in figure 2a .
  • The figure 3 is a perspective view in axial section of a variant of the barrel, the main body of the object of the invention.

En référence à la figure 1, celle-ci représente une pièce d'horlogerie, en particulier son mouvement. Ce dernier comprend un barillet 1, un rouage de finissage 10, un échappement 11 et un régulateur 12.With reference to the figure 1 , it represents a timepiece, especially its movement. The latter comprises a cylinder 1, a finishing train 10, an exhaust 11 and a regulator 12.

Tel que représenté dans les figures 2a et 2b, le barillet 1 consiste en une mince boîte cylindrique dont le logement intérieur est destiné à recevoir un ressort moteur (non illustré). A sa périphérie, ce barillet comporte une denture 3 destinée à entraîner le rouage de finissage 10. Le barillet est formé de trois parties distinctes, à savoir une paroi latérale cylindrique 2 entourée de la denture 3, et deux disques 4, 4', l'un faisant office de couvercle et l'autre faisant office de fond. Ces deux disques sont destinés à fermer l'espace délimité par la paroi latérale cylindrique 2 en prenant chacun appui sur un des deux bords 21, 21' de cette paroi. De préférence, les disques prennent appui sur une portée circulaire 22, 22' ménagée sur le bord de la paroi. Ainsi et comme mieux illustré à la figure 2b, la surface extérieure de chaque disque peut avantageusement venir à fleur du bord 21, 21'.As shown in the Figures 2a and 2b , the barrel 1 consists of a thin cylindrical box whose inner housing is intended to receive a motor spring (not shown). At its periphery, this barrel has a toothing 3 intended to drive the finishing train 10. The barrel is formed of three distinct parts, namely a cylindrical side wall 2 surrounded by the toothing 3, and two discs 4, 4 ', 1 one acting as a lid and the other acting as a bottom. These two discs are intended to close the space delimited by the cylindrical side wall 2, each bearing on one of the two edges 21, 21 'of this wall. Preferably, the disks are supported on a circular bearing surface 22, 22 'provided on the edge of the wall. So and as best illustrated at the figure 2b , the outer surface of each disk can advantageously come flush with the edge 21, 21 '.

Chaque disque 4, 4' comporte une ouverture axiale 5, 5' pour le passage d'un arbre de barillet 7 dont l'axe longitudinal 8 est perpendiculaire au plan des disques. Chaque ouverture axiale 5, 5' est bordée d'une saillie annulaire 6, 6' servant de palier pour l'arbre 7.Each disc 4, 4 'has an axial opening 5, 5' for the passage of a barrel shaft 7 whose longitudinal axis 8 is perpendicular to the plane of the discs. Each axial opening 5, 5 'is lined with an annular projection 6, 6' serving as a bearing for the shaft 7.

La hauteur du logement que ce barillet réserve pour le ressort moteur est comprise entre 85% et 97% de la hauteur totale du barillet, à savoir de la distance qui sépare les faces extérieures des deux disques 4, 4' à la périphérie du barillet, donc sans tenir compte d'éventuelles surépaisseurs des surfaces extérieures des disques à proximité de l'axe. Pour répondre à cette caractéristique, au moins l'un des disques 4, 4' doit avoir une épaisseur sensiblement inférieure à ce qui est connu de l'art antérieur. Selon l'état de la technique, l'épaisseur du fond ou du couvercle d'un tambour de barillet de grandeur comparable est typiquement de l'ordre de 0.2 mm.The height of the housing that this barrel reserves for the mainspring is between 85% and 97% of the total height of the cylinder, namely the distance that separates the outer faces of the two discs 4, 4 'at the periphery of the barrel, therefore without taking into account any extra thicknesses of the outer surfaces of the discs close to the axis. To meet this characteristic, at least one of the discs 4, 4 'must have a thickness substantially less than that known from the prior art. According to the state of the art, the thickness of the bottom or the cover of a drum drum of comparable size is typically of the order of 0.2 mm.

Il a été constaté que, pour un barillet d'un diamètre de 11.6 mm avec une hauteur du logement de 73% par rapport à la hauteur totale, destiné à équiper un mouvement de montre-bracelet d'un diamètre de 29 mm, une augmentation de 0.1 mm de la hauteur du ruban formant le ressort de barillet se traduisait par un gain de réserve de marche de l'ordre de 11%. Pour une montre standard dont l'autonomie est typiquement de 55 h, le gain constaté permet donc d'accroître la durée de fonctionnement de la montre de 6 heures. Avantageusement, en augmentant la hauteur du logement du ressort de 0.2 mm par un amincissement de 0.1 mm de chaque disque du barillet, le gain de réserve de marche de la montre peut être porté à 22% (hauteur du logement de 86%). Une telle valeur permet d'obtenir une confortable autonomie de 67 heures, par comparaison avec les 55 heures qu'offrait jusqu'à présent la même montre équipée d'un barillet standard de même encombrement. En utilisant un disque 4' d'une épaisseur de 0.1 mm et un disque 4 de 0.05 mm d'épaisseur (hauteur de logement de 90%), le gain de réserve de marche est de 27% ce qui correspond à une autonomie de 70 heures. Si les deux disques 4, 4' ont une épaisseur de 0.05 mm (hauteur de logement de 93%), ce gain est porté à 31% et l'autonomie à 72 heures.It has been found that, for a barrel with a diameter of 11.6 mm and a height of the housing of 73% relative to the total height, intended to equip a wristwatch movement with a diameter of 29 mm, an increase of 0.1 mm of the height of the ribbon forming the mainspring resulted in a gain in power reserve of the order of 11%. For a standard watch whose autonomy is typically 55 hours, the gain found allows to increase the running time of the watch of 6 hours. Advantageously, by increasing the height of the spring housing by 0.2 mm by a thinning of 0.1 mm of each disc of the barrel, the power reserve of the watch can be increased to 22% (height of housing 86%). Such a value makes it possible to obtain a comfortable autonomy of 67 hours, compared to the 55 hours that until now had offered the same watch equipped with a standard cylinder of the same size. Using a disk 4 'with a thickness of 0.1 mm and a disk 4 of 0.05 mm thick (housing height of 90%), the power reserve gain is 27% which corresponds to a battery life of 70%. hours. If the two discs 4, 4 'have a thickness of 0.05 mm (housing height of 93%), this gain is increased to 31% and the autonomy to 72 hours.

Selon l'invention, au moins un des disques 4, 4' est un disque aminci qui présente une épaisseur inférieure à 0.2 mm, de préférence une épaisseur comprise entre 0.04 mm et 0.12 mm. Avantageusement, cette épaisseur d'au moins un des disques 4, 4' est donc inférieure ou égale à 0.12 mm, voire inférieure ou égale à 0.10 mm, voire même inférieure ou égale à 0.09 mm, voire même inférieure ou égale à 0.08 mm.According to the invention, at least one of the discs 4, 4 'is a thinned disc which has a thickness of less than 0.2 mm, preferably a thickness of between 0.04 mm and 0.12 mm. Advantageously, this thickness of at least one of the disks 4, 4 'is therefore less than or equal to 0.12 mm, or even less than or equal to 0.10 mm, or even less than or equal to 0.09 mm, or even less than or equal to 0.08 mm.

Si le gain et l'intérêt qui découlent dudit constat sont manifestes, l'amincissement des parois circulaires du barillet engendre cependant plusieurs difficultés du point de vue de la réalisation et de la résistance mécanique du barillet.If the gain and the interest which result from said observation are obvious, the thinning of the circular walls of the barrel causes however several difficulties from the point of view of the realization and the mechanical strength of the barrel.

La première difficulté réside dans l'obtention de disques fortement amincis qui de ce fait présentent une très faible épaisseur, typiquement inférieure à 0.08 mm, par exemple de l'ordre de 0.04 mm seulement. En dessous de cette première valeur, il devient quasiment impossible d'obtenir une pièce de qualité à partir d'un usinage mécanique.The first difficulty lies in obtaining highly thinned discs which therefore have a very small thickness, typically less than 0.08 mm, for example of the order of 0.04 mm only. Below this first value, it becomes almost impossible to obtain a quality part from a mechanical machining.

Pour obtenir des disques très minces, on peut avantageusement utiliser des matériaux comme la céramique, obtenue par frittage, le rubis, ou le Phynox®, alliage métallique à haute performance à base de cobalt qui est inoxydable, présente une grande résistance mécanique et permet d'obtenir les disques susmentionnés par étampage, ou encore le Toughmet® ou le Pfinodal®, qui sont des alliages spinodaux à base de cuivre avec addition de nickel et d'étain. On peut aussi utiliser des matériaux susceptibles d'être mis en forme par des procédés de microfabrication comme l'électroformage (par exemple, alliages Ni, NiP, NiCo obtenus par un procédé de type LIGA, abréviation de « Lithographie, Galvanoformung, Abformung ») ou la gravure profonde (par exemple, le silicium, le quartz ou le diamant par un procédé de type DRIE, abréviation de « Deep Reactive Ion Etching »).To obtain very thin discs, can be advantageously used materials such as ceramics, obtained by sintering, ruby, or Phynox ®, metal alloy with high cobalt performance is stainless, has a high mechanical strength and allows obtain the aforementioned discs by stamping, or Toughmet ® or Pfinodal ® , which are copper-based spinodal alloys with addition of nickel and tin. It is also possible to use materials that can be shaped by microfabrication processes such as electroforming (for example, Ni, NiP, NiCo alloys obtained by a LIGA type process, abbreviation of "Lithography, Galvanoformung, Abformung"). or deep etching (for example, silicon, quartz or diamond by a process of the DRIE type, abbreviation of "Deep Reactive Ion Etching").

La seconde difficulté, qui découle de la première, réside dans l'usinage de la saillie annulaire 6, 6' qui, pour fournir un pivotement adéquat du barillet 1 par rapport à l'arbre 7, devient d'autant plus nécessaire que l'épaisseur du disque auquel elle est associée est fine. Pour cette raison, la saillie annulaire 6, 6' peut être rapportée à la surface du disque 4, 4' après avoir été usinée à part. De ce fait, cette saillie annulaire peut avantageusement être réalisée en un matériau différent de celui du disque. Ceci permet de choisir un matériau pour la saillie qui offre de bonnes caractéristiques tribologiques pour optimiser le pivotement, mais qui n'est pas forcément adapté à la réalisation du disque. Typiquement, on privilégiera pour la réalisation de cette saillie l'utilisation d'alliages classiques comme le CuBe ou le laiton, ou d'un métal tel que le nickel qui prévient tout grippage tout en présentant une excellente résistance à l'usure. L'assemblage de la saillie annulaire sur le disque peut être obtenu par soudage, par rivetage, par brasage ou par collage. De préférence, l'appui du disque 4, 4' sur la saillie annulaire se fait par l'intermédiaire d'une portée circulaire 62, 62' qui, notamment, permet de protéger le bord de l'ouverture axiale 5 situé à proximité directe de l'arbre de barillet.The second difficulty, which arises from the first, lies in the machining of the annular projection 6, 6 'which, to provide a suitable pivoting of the barrel 1 relative to the shaft 7, becomes all the more necessary that the the thickness of the disk with which it is associated is fine. For this Because of this, the annular projection 6, 6 'can be attached to the surface of the disc 4, 4' after having been machined apart. As a result, this annular projection can advantageously be made of a material different from that of the disk. This allows to choose a material for the projection which offers good tribological characteristics to optimize the pivoting, but which is not necessarily adapted to the realization of the disc. Typically, preference will be given to the production of this projection the use of conventional alloys such as CuBe or brass, or a metal such as nickel which prevents galling while having excellent wear resistance. The assembly of the annular projection on the disc can be obtained by welding, riveting, brazing or gluing. Preferably, the support of the disc 4, 4 'on the annular projection is via a circular bearing 62, 62' which, in particular, protects the edge of the axial opening 5 located in close proximity of the barrel shaft.

En référence à la figure 3, celle-ci illustre une variante du barillet selon l'invention. On remarque d'une part que la saillie annulaire 6, 6' n'est pas nécessairement rapportée au disque 4, 4' mais peut être formée d'un seul tenant avec le disque auquel elle est associée. D'autre part, on remarque qu'il peut en être de même pour la denture 3 qui constitue ou est ménagée dans une surépaisseur de la périphérie du disque. On peut encore constater que l'un des disques 4, 4', en l'occurrence le disque 4, peut être formé d'un seul tenant avec la paroi latérale cylindrique 2. Dans ce cas, l'emboîtement des deux parties ainsi formées du barillet pourra par exemple être constitué par la face interne d'un épaulement 9 dans lequel est ménagée la denture 3 et par une portée ménagée dans le bord de la paroi latérale circulaire 2, comme illustré à la figure 3. Les deux parties peuvent être liées l'une à l'autre par collage ou par soudage lors de l'assemblage et de la fermeture du barillet, comme peuvent aussi l'être les disques 4, 4' de la figure 2. On peut aussi réaliser un tel assemblage par chassage, rivetage ou clipsage.With reference to the figure 3 , this illustrates a variant of the barrel according to the invention. It is noted on the one hand that the annular projection 6, 6 'is not necessarily related to the disk 4, 4' but may be formed integrally with the disk with which it is associated. On the other hand, it is noted that it may be the same for the toothing 3 which is or is formed in an extra thickness of the periphery of the disc. It can still be seen that one of the discs 4, 4 ', in this case the disc 4, can be formed in one piece with the cylindrical side wall 2. In this case, the interlocking of the two parts thus formed the barrel may for example be constituted by the inner face of a shoulder 9 in which is formed the toothing 3 and a bearing formed in the edge of the circular side wall 2, as shown in FIG. figure 3 . The two parts can be bonded to each other by gluing or welding during assembly and closing of the barrel, as can also be the discs 4, 4 'of the figure 2 . We can also achieve such an assembly by driving, riveting or clipping.

Un tel mode de fixation, qui rend au moins un des disques solidaire de la paroi cylindrique, permet d'améliorer la rigidité du barillet.Such a method of attachment, which makes at least one of the disks integral with the cylindrical wall, improves the rigidity of the barrel.

Il est également possible de n'amincir qu'un des deux disques ou encore de créer un barillet à partir de deux demi-tambours, formés par exemple pour l'un d'un disque et d'une première moitié supérieure de paroi latérale cylindrique et pour l'autre de l'autre disque et d'une seconde moitié inférieure de paroi latérale cylindrique entourée de sa denture. Les deux moitiés précitées peuvent être assemblées par l'intermédiaire d'un moyen identique ou comparable à celui de la figure 3 et liées entre elles par collage ou par soudage. On peut aussi réaliser un tel assemblage par chassage ou clipsage.It is also possible to thin only one of the two discs or to create a barrel from two half-drums, formed for example for one of a disc and a first upper half of cylindrical side wall and for the other of the other disc and a second lower half of cylindrical side wall surrounded by its toothing. The two halves mentioned above may be assembled by a means identical or comparable to that of the figure 3 and bonded together by gluing or welding. It is also possible to perform such an assembly by driving or clipping.

La forme d'exécution et les variantes décrites ci-avant peuvent être prises, soit dans leur ensemble, soit en partie ou séparément dans la réalisation du barillet 1.The embodiment and variants described above can be taken, either as a whole, or partly or separately in the embodiment of the cylinder 1.

Selon l'invention, on remarquera que la paroi circulaire 2, servant notamment de point d'ancrage pour l'extrémité extérieure du ressort moteur et de surface de glissement dans le cas d'un ressort à bride glissante, conserve son épaisseur normale qui lui procure la rigidité nécessaire à la tenue de l'ensemble du barillet.According to the invention, it will be noted that the circular wall 2, serving in particular as anchor point for the outer end of the mainspring and sliding surface in the case of a sliding-flange spring, retains its normal thickness which provides the rigidity needed to hold the entire barrel.

Claims (13)

Mouvement d'horlogerie de diamètre inférieur à 40 mm qui comporte un barillet (1) pour le logement d'un ressort moteur dont le diamètre est inférieur au rayon dudit mouvement, ce barillet (1) comportant une paroi latérale cylindrique (2) entourée d'une denture (3) et dont chaque bord (21, 21') est fermé par un disque (4, 4') traversé axialement d'une ouverture (5, 5') de pivotement d'un arbre (7) de barillet, caractérisé en ce que la hauteur dudit logement est comprise entre 85% et 97% de la hauteur totale à la périphérie du barillet (1).A watch movement with a diameter of less than 40 mm which comprises a cylinder (1) for housing a motor spring whose diameter is smaller than the radius of said movement, this cylinder (1) having a cylindrical side wall (2) surrounded by a toothing (3) and each edge (21, 21 ') is closed by a disc (4, 4') axially traversed by an opening (5, 5 ') for pivoting a barrel shaft (7) , characterized in that the height of said housing is between 85% and 97% of the total height at the periphery of the barrel (1). Mouvement selon la revendication 1, caractérisé en ce que l'un desdits disques (4, 4') présente une épaisseur comprise entre 0.04 et 0.12 mm.Movement according to claim 1, characterized in that one of said disks (4, 4 ') has a thickness of between 0.04 and 0.12 mm. Mouvement selon la revendication 1 ou 2, caractérisé en ce que l'un desdits disques présente une épaisseur inférieure à 0.10 mm, voire inférieure à 0.09 mm, voire inférieure à 0.08 mm.Movement according to claim 1 or 2, characterized in that one of said disks has a thickness less than 0.10 mm, or even less than 0.09 mm, or even less than 0.08 mm. Mouvement selon l'une des revendications précédentes, caractérisé en ce que les deux disques (4, 4') présentent chacun une épaisseur comprise entre 0.04 et 0.12 mm.Movement according to one of the preceding claims, characterized in that the two discs (4, 4 ') each have a thickness of between 0.04 and 0.12 mm. Mouvement selon l'une des revendications précédentes, caractérisé en ce que les deux disques (4, 4') présentent chacun une épaisseur inférieure à 0.10 mm, voire inférieure à 0.09 mm, voire inférieure à 0.08 mm.Movement according to one of the preceding claims, characterized in that the two discs (4, 4 ') each have a thickness less than 0.10 mm, or even less than 0.09 mm, or even less than 0.08 mm. Mouvement selon l'une des revendications précédentes, caractérisé en ce qu'au moins une desdites ouvertures (5, 5') traversant un disque (4, 4') est bordée d'une saillie annulaire (6, 6') rapportée à la surface dudit disque (4, 4').Movement according to one of the preceding claims, characterized in that at least one of said openings (5, 5 ') passing through a disk (4, 4') is flanked by an annular projection (6, 6 ') relative to the surface of said disk (4, 4 '). Mouvement selon la revendication précédente, caractérisé en ce que ladite saillie annulaire (6, 6') est en un matériau différent de celui du disque (4, 4').Movement according to the preceding claim, characterized in that said annular projection (6, 6 ') is of a material different from that of the disc (4, 4'). Mouvement selon la revendication 6 ou 7, caractérisé en ce que ladite saillie annulaire (6, 6') est rapportée à la surface du disque (4, 4') par collage, par soudage ou par rivetage.Movement according to claim 6 or 7, characterized in that said annular projection (6, 6 ') is attached to the surface of the disc (4, 4') by gluing, welding or riveting. Mouvement selon l'une des revendications précédentes, caractérisé en ce qu'au moins l'un des disques (4, 4') est assemblé à ladite paroi latérale cylindrique (2, 2') par soudage ou par collage.Movement according to one of the preceding claims, characterized in that at least one of the discs (4, 4 ') is connected to said cylindrical side wall (2, 2') by welding or gluing. Mouvement selon l'une des revendications précédentes, caractérisé en ce que ladite denture (3) est ménagée dans une surépaisseur solidaire de l'un des disques (4, 4') .Movement according to one of the preceding claims, characterized in that said toothing (3) is formed in an integral thickness of one of the disks (4, 4 '). Mouvement selon l'une des revendications précédentes, caractérisé en ce qu'au moins l'un desdits disques (4, 4') est en céramique, en alliage inoxydable haute performance à base de cobalt, ou en alliages spinodaux à base de cuivre avec addition de nickel et d'étain.Movement according to one of the preceding claims, characterized in that at least one of said disks (4, 4 ') is ceramic, high-performance cobalt-based stainless alloy or copper-based spinodal alloys. addition of nickel and tin. Mouvement selon l'une des revendications précédentes, caractérisé en ce qu'au moins l'un desdits disques (4, 4') est en silicium, en quartz ou en diamant.Movement according to one of the preceding claims, characterized in that at least one of said disks (4, 4 ') is made of silicon, quartz or diamond. Pièce d'horlogerie comprenant un mouvement selon l'une des revendications précédentes.Timepiece comprising a movement according to one of the preceding claims.
EP11405329.1A 2010-10-01 2011-09-23 Timepiece Active EP2437125B1 (en)

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EP3273304A1 (en) * 2016-07-19 2018-01-24 Nivarox-FAR S.A. Part for clock movement
CN107632510A (en) * 2016-07-19 2018-01-26 尼瓦洛克斯-法尔股份有限公司 Component for watch and clock movement
EP3974913A1 (en) * 2014-06-30 2022-03-30 Rolex Sa Barrel for timepiece

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USD894777S1 (en) * 2018-03-02 2020-09-01 Tudor Watch U.S.A., Llc Watch movement
USD894779S1 (en) * 2018-03-06 2020-09-01 Rolex Watch U.S.A., Inc. Watch movement
JP7143675B2 (en) * 2018-08-14 2022-09-29 セイコーエプソン株式会社 Watch parts, movements and watches

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US9298162B2 (en) 2016-03-29
CN102445895B (en) 2017-04-12
JP2012078354A (en) 2012-04-19
JP5999882B2 (en) 2016-09-28
CN102445895A (en) 2012-05-09
EP2437125B1 (en) 2019-09-04
US20120082009A1 (en) 2012-04-05

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