EP2196866B1 - Anordnung mit einem Sperrad zum Aufziehen, das an einer Federhauswelle befestigt ist, und Federhauswelle für diese Anordnung - Google Patents

Anordnung mit einem Sperrad zum Aufziehen, das an einer Federhauswelle befestigt ist, und Federhauswelle für diese Anordnung Download PDF

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Publication number
EP2196866B1
EP2196866B1 EP09011789.6A EP09011789A EP2196866B1 EP 2196866 B1 EP2196866 B1 EP 2196866B1 EP 09011789 A EP09011789 A EP 09011789A EP 2196866 B1 EP2196866 B1 EP 2196866B1
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EP
European Patent Office
Prior art keywords
ratchet
barrel
barrel arbor
driving formation
shape
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EP09011789.6A
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German (de)
French (fr)
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EP2196866A3 (en
EP2196866A2 (en
Inventor
Béranger Reynard
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DURAFOURG, FRANCOIS
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Individual
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Publication of EP2196866A2 publication Critical patent/EP2196866A2/en
Publication of EP2196866A3 publication Critical patent/EP2196866A3/en
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Publication of EP2196866B1 publication Critical patent/EP2196866B1/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

Definitions

  • the present invention relates to an assembly comprising a winding ratchet fixed on a barrel shaft, and a barrel shaft intended to be part of a timepiece.
  • the winding ratchet In high-end timepieces, especially in those where all or part of the movement is visible, the winding ratchet has a square drive opening in which the end square of the barrel tree. This winding ratchet is then screwed with three screws generally in the end face of the barrel shaft as shown in FIG. figure 6 . A winding ratchet screwed with three eccentric screws on the barrel shaft is described in US Pat. US 808 176 .
  • This method is particularly aesthetic but entails the disadvantage of requiring a large diameter barrel shaft unnecessarily occupying a large volume of the inner space of the barrel cage which requires limiting the length and number of turns of the spring barrel for a barrel cage of given diameter. This results in a decrease in the power reserve or an increase in the diameter of the barrel cage and therefore its size. This also results in a heavier barrel shaft.
  • the object of the present invention is to provide a device for fixing a winding ratchet on a barrel axis which makes it possible to obtain an assembly having the same aesthetic appearance as a ratchet screwed into the end face of a barrel shaft while by making it possible to reduce the diameter of the barrel shaft to a minimum value for a given spring thickness, thereby guaranteeing a minimum barrel size, a large power reserve and a reduction in the weight of the barrel shaft.
  • the present invention relates to a set formed by a winding ratchet and a barrel shaft, said ratchet having at least one tapping eccentric with respect to the ratchet of a determined distance, characterized in that one of the ends of the barrel shaft has a non-circular shaped driving formation and a groove adjacent to this forming formation defining a portion of reduced section of the barrel shaft whose shape and dimensions are such that they fit into the section of the drive formation, a shoulder of the barrel shaft limiting the height of said groove of the barrel shaft; opposite side to said training training; in that the ratchet has a central opening of shape and size corresponding to the drive formation of the barrel shaft; in that it comprises a fixing washer having a central passage of shape and dimension corresponding to the drive formation of the barrel shaft and in which is engaged said training training in the assembled position as well as at least one hole eccentric with respect to said washer by a predetermined distance equal to the eccentricity of said at least one tapping of the ratchet; in that it also comprises at least one screw for screwing
  • the invention also relates to a barrel shaft forming part of the assembly according to claim 1, comprising a median portion intended to receive the inner turn of a barrel spring located between two cylindrical portions serving as a bearing on the box and to the lid of a barrel, one of these cylindrical portions being terminated by a pivot forming one of the ends of the barrel shaft for pivoting the barrel shaft in a plate of a watch movement, characterized by the fact that the other of these cylindrical portions is separated from a non-circular drive member forming the other end of the barrel shaft by a groove whose inside diameter is less than to the circle inscribed in the shape of the drive member and whose height corresponds to the thickness of a ratchet to be fixed to the barrel shaft.
  • the barrel ratchet a driven by a square b forming an end of the barrel shaft c is screwed with screws directly into the end face of the barrel shaft c pivoted between the plate d and the bridge barrel e.
  • This type of fastener is generally used in high-end watch movements where the winding ratchet is visible.
  • This fixing with its three screws offset by 120 °, is very aesthetic and pleases users.
  • this method of attachment requires a large diameter of the barrel shaft, significantly larger than ten times the thickness of the barrel spring which is the norm, and therefore unduly reduces the volume of the barrel cage and the power reserve of the movement the spring having fewer turns for a given size of the barrel.
  • the device for fixing a winding ratchet on a barrel shaft makes it possible to produce an assembly having the same aesthetic appearance as those of the prior art but whose barrel shaft may have a smaller diameter.
  • optimally determined is about ten times the thickness of the mainspring only, which, for a cage of a diameter of determined diameter, frees space and increases the number of turns of the mainspring and therefore the power reserve.
  • the weight of the barrel shaft is also reduced.
  • the device for fixing a winding ratchet on a barrel axis comprises a particular ratchet, a barrel shaft whose end bearing the drive square has a particular shape, a drive washer and screw.
  • the winding ratchet 1 shown in plan at figure 4 has an external toothing and a central opening 2 square and threads 3, in the example illustrated three, evenly distributed around the axis O of the winding ratchet 1.
  • the central opening is square and where three screws are provided
  • one of the threads 3a is focused on a radius of the ratchet 1 passing through the center of one side of the opening 2 and the other two threads are located on rays of the ratchet 1 forming an angle of 120 ° with the radius passing through the tapping 3a.
  • the barrel shaft 4 has at one of its ends a driving square 5 whose dimensions correspond to the central opening 2 of the ratchet to be able to pass through this central opening 2.
  • the barrel shaft 4 comprises at its end comprising the driving square 5 a groove 6 whose inner diameter is smaller than the length of one side of the drive square 5.
  • the diameter of the middle portion 7 of the barrel shaft 4 is more large than that of the bottom of the groove 6 but is determined according to the thickness of the mainspring. Generally, optimally this diameter is approximately equal to ten times the thickness of the mainspring. This depends inter alia on the material in which the mainspring is made.
  • the diameter of the bottom of the groove 6 of the barrel shaft 4 substantially corresponds to the length of one side of the central opening 2 of the winding ratchet respectively of the driving square 5 of the barrel shaft 4.
  • the fixing device also comprises a fixing washer 8 comprising a central passage 9 of shape and dimension corresponding to the drive square 5 of the barrel shaft and the central opening 2 of the ratchet 1.
  • This fixing washer 8 further comprises holes 10, three in the example shown, in number equal to the number of threads 3 ratchet 1. These holes 10 are uniformly distributed around the center O 'of the washer 8. These holes 10 are located on a circle x of diameter identical to that y of the ratchet on which the threads 3 are arranged. By against the orientation of these holes 10 relative to the central passage 9 of the washer 8 is different from the orientation of the threads 3 relative to the central opening 2 of the ratchet 1. This difference in orientation is represented by the angle ⁇ .
  • the central opening 2 of the ratchet 1 is angularly offset relative to the central passage 9 of the washer 8.
  • the fixing device also comprises screws 11, three in the illustrated example, which, in the operating position, pass through the bores 10 of the washer 8 and are screwed into the threads 3 of the ratchet 1.
  • the barrel shaft 4 is pivoted between the plate 12 and the barrel bridge 13 of a clockwork movement using stones 14, 15.
  • the barrel shaft 4 serves as a pivot for the formed barrel cage of a cover 16 and a box 17.
  • a barrel spring (not shown) is fixed by its inner end to the median part 7 of the barrel shaft 4 and by its outer turn to the side wall of the box barrel 17.
  • the square 5 of the barrel axis 4 is passed through the central opening 2 of the ratchet 1 whose thickness is less than the height of the barrel. 6 throat of the barrel axis 4. On then rotates this ratchet 1 relative to the barrel shaft 4 by an angle ⁇ . In this way the square central opening 2 of the ratchet is no longer aligned on the square 5 of the barrel shaft 4.
  • the square 5 of the barrel shaft 4 is then placed in the square passage of the fixing washer 8.
  • the threads 3 of the ratchet 1 are then aligned with the bores 10 of the fixing washer 8 and the screws 11 are screwed into the threads 3 of the ratchet tightening this fixing plate 8 against the ratchet 1 and thus making it integral in rotation with the barrel shaft 4 by means of the square 5 engaged in the central passage 9 of the fixing washer 8.
  • the ratchet is simultaneously limited in its axial displacements with respect to the barrel axis by the lower face of the square 5 of this barrel shaft and by the shoulder 18 of this barrel shaft defining the height of the groove 6.
  • the diameter of the barrel shaft 4 can be reduced, the fastening screws 11 of the ratchet 1 no longer need to be screwed into the barrel. end of the barrel shaft 4.
  • the diameter of the central portion 7 of the barrel shaft can thus be determined according to the thickness of the mainspring, generally of the order of ten times the thickness of said spring of barrel, which leads to a sharp reduction in the diameter of this middle portion 7 of the barrel shaft relative to the conventional barrel shafts (see figure 6 ).
  • the space available for the mainspring in the barrel box 17 is larger, the spring can have more turns and the power reserve of the movement is increased for the same total size of the barrel.
  • the weight of the barrel shaft is decreased.
  • the shape of the end 5 of the barrel shaft 4 may not be square but oval or polygonal, generally non-circular, provided that the shape of the central opening 2 of the ratchet 1 and the central passage 9 of the fixing plate 8 is of corresponding shape.
  • the barrel shaft 4 comprises a median portion 7 receiving the inner coil of a barrel spring (not shown).
  • the barrel shaft On one side of this middle portion 7 the barrel shaft has a first cylindrical portion 19 serving as a bearing on the barrel box 17 and ending with a first pin 20 pivoted in the plate 12 by a movement by the stone 14.
  • the barrel shaft 4 On the other side this middle portion 7 the barrel shaft 4 has a second cylindrical portion 21 serving as a bearing barrel cover 16 followed by a second pin 22 pivoting in the barrel bridge 13 with the stone 15.
  • This second trunnion 22 is extended by the portion of the barrel shaft 4, having the groove 6 and ends with the ratchet 1 driving member, here the square 5.
  • the number of fastening screws 11 of the fastening washer 8 on the ratchet 1 may be different from three, for example two, four or five, but at least one.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transmission Devices (AREA)
  • Toys (AREA)
  • Stringed Musical Instruments (AREA)
  • Adornments (AREA)

Description

La présente invention a pour objet un ensemble comprenant un rochet de remontoir fixé sur un arbre de barillet, ainsi qu'un arbre de barillet destiné à faire partie d'une pièce d'horlogerie.The present invention relates to an assembly comprising a winding ratchet fixed on a barrel shaft, and a barrel shaft intended to be part of a timepiece.

Dans les pièces d'horlogerie de haut de gamme, notamment dans celles ou l'on rend visible tout ou partie du mouvement, le rochet de remontoir comporte une ouverture carrée d'entraînement dans laquelle vient se loger le carré d'extrémité de l'arbre de barillet. Ce rochet de remontoir est alors vissé à l'aide de trois vis généralement dans la face terminale de l'arbre de barillet comme cela est illustré à la figure 6. Un rochet de remontoir vissé à l'aide de trois vis excentrées sur l'arbre de barillet est décrit dans le brevet américain US 808 176 .In high-end timepieces, especially in those where all or part of the movement is visible, the winding ratchet has a square drive opening in which the end square of the barrel tree. This winding ratchet is then screwed with three screws generally in the end face of the barrel shaft as shown in FIG. figure 6 . A winding ratchet screwed with three eccentric screws on the barrel shaft is described in US Pat. US 808 176 .

Cette façon de faire est particulièrement esthétique mais entraîne l'inconvénient de nécessiter un arbre de barillet de grand diamètre occupant inutilement un grand volume de l'espace intérieur de la cage de barillet ce qui oblige de limiter la longueur et le nombre de spires du ressort de barillet pour une cage de barillet de diamètre donné. Il en résulte une diminution de la réserve de marche ou une augmentation du diamètre de la cage de barillet et donc de son encombrement. Il en résulte également un alourdissement de l'arbre de barillet.This method is particularly aesthetic but entails the disadvantage of requiring a large diameter barrel shaft unnecessarily occupying a large volume of the inner space of the barrel cage which requires limiting the length and number of turns of the spring barrel for a barrel cage of given diameter. This results in a decrease in the power reserve or an increase in the diameter of the barrel cage and therefore its size. This also results in a heavier barrel shaft.

La présente invention a pour but de réaliser un dispositif de fixation d'un rochet de remontoir sur un axe de barillet qui permette d'obtenir un ensemble présentant la même esthétique qu'un rochet vissé dans la face terminale d'un arbre de barillet tout en permettant de diminuer le diamètre de l'arbre de barillet à une valeur minimale pour une épaisseur de ressort donnée, garantissant ainsi un encombrement minimum du barillet, une grande réserve de marche et une diminution du poids de l'arbre de barillet.The object of the present invention is to provide a device for fixing a winding ratchet on a barrel axis which makes it possible to obtain an assembly having the same aesthetic appearance as a ratchet screwed into the end face of a barrel shaft while by making it possible to reduce the diameter of the barrel shaft to a minimum value for a given spring thickness, thereby guaranteeing a minimum barrel size, a large power reserve and a reduction in the weight of the barrel shaft.

La présente invention a pour objet un ensemble formé d'un rochet de remontoir et d'un arbre de barillet, ledit rochet comportant au moins un taraudage excentré par rapport au rochet d'une distance déterminée, caractérisé par le fait que l'une des extrémités de l'arbre de barillet comporte une formation d'entraînement de forme non circulaire ainsi qu'une gorge adjacente à cette formation d'entraînement définissant une portion de section réduite de l'arbre de barillet dont la forme et les dimensions sont telles qu'elles s'inscrivent dans la section de la formation d'entraînement, un épaulement de l'arbre de barillet limitant la hauteur de ladite gorge du côté opposé à ladite formation d'entraînement; par le fait que le rochet comporte une ouverture centrale de forme et de dimension correspondant à la formation d'entraînement de l'arbre de barillet; par le fait qu'il comporte une rondelle de fixation présentant un passage central de forme et de dimension correspondant à la formation d'entraînement de l'arbre de barillet et dans lequel est engagée ladite formation d'entraînement en position assemblée ainsi qu'au moins un perçage excentré par rapport à ladite rondelle d'une distance prédéterminée égale à l'excentration dudit au moins un taraudage du rochet; par le fait qu'il comporte encore au moins une vis permettant de visser la rondelle de fixation sur le rochet; et par le fait que la position angulaire dudit au moins un taraudage du rochet par rapport à un axe de symétrie de son ouverture centrale est différente d'un angle de la position angulaire que ledit au moins un perçage de la rondelle de fixation présente par rapport à l'axe de symétrie correspondant du passage central de cette rondelle de fixation.The present invention relates to a set formed by a winding ratchet and a barrel shaft, said ratchet having at least one tapping eccentric with respect to the ratchet of a determined distance, characterized in that one of the ends of the barrel shaft has a non-circular shaped driving formation and a groove adjacent to this forming formation defining a portion of reduced section of the barrel shaft whose shape and dimensions are such that they fit into the section of the drive formation, a shoulder of the barrel shaft limiting the height of said groove of the barrel shaft; opposite side to said training training; in that the ratchet has a central opening of shape and size corresponding to the drive formation of the barrel shaft; in that it comprises a fixing washer having a central passage of shape and dimension corresponding to the drive formation of the barrel shaft and in which is engaged said training training in the assembled position as well as at least one hole eccentric with respect to said washer by a predetermined distance equal to the eccentricity of said at least one tapping of the ratchet; in that it also comprises at least one screw for screwing the fixing washer on the ratchet; and in that the angular position of said at least one tapping of the ratchet with respect to an axis of symmetry of its central opening is different from an angle of the angular position that said at least one drilling of the fixing washer has relative to to the corresponding axis of symmetry of the central passage of this fixing washer.

L'invention a également pour objet un arbre de barillet faisant partie de l'ensemble selon la revendication 1, comportant une partie médiane destinée à recevoir la spire interne d'un ressort de barillet situé entre deux portions cylindriques servant de palier à la boîte et au couvercle d'un barillet, l'une de ces portions cylindriques étant terminée par un pivot formant l'une des extrémités de l'arbre de barillet destiné à pivoter l'arbre de barillet dans une platine d'un mouvement horloger, caractérisé par le fait que l'autre de ces portions cylindriques est séparé d'un organe d'entraînement de forme non circulaire formant l'autre extrémité de l'arbre de barillet par une gorge dont le diamètre intérieur est inférieur au cercle inscrit dans la forme de l'organe d'entraînement et dont la hauteur correspond à l'épaisseur d'un rochet devant être fixé à l'arbre de barillet.The invention also relates to a barrel shaft forming part of the assembly according to claim 1, comprising a median portion intended to receive the inner turn of a barrel spring located between two cylindrical portions serving as a bearing on the box and to the lid of a barrel, one of these cylindrical portions being terminated by a pivot forming one of the ends of the barrel shaft for pivoting the barrel shaft in a plate of a watch movement, characterized by the fact that the other of these cylindrical portions is separated from a non-circular drive member forming the other end of the barrel shaft by a groove whose inside diameter is less than to the circle inscribed in the shape of the drive member and whose height corresponds to the thickness of a ratchet to be fixed to the barrel shaft.

Le dessin annexé illustre schématiquement et à titre d'exemple une forme d'exécution de l'ensemble comprenant un rochet de remontoir fixé sur un arbre de barillet.

  • La figure 1 est une vue de dessus d'un mouvement d'horlogerie de haut de gamme dans lequel le rochet de remontoir est fixé sur l'arbre de barillet à l'aide du dispositif selon l'invention.
  • La figure 2 illustre un arbre de barillet tel qu'utilisé dans l'ensemble réalisé selon l'invention.
  • La figure 3 est une coupe partielle suivant la ligne A-A de la figure 1 montrant la fixation du rochet de remontoir sur l'arbre de barillet.
  • La figure 4 illustre en plan le rochet de barillet selon l'invention.
  • La figure 5 illustre une plaque de fixation du dispositif selon l'invention.
  • La figure 6 illustre la fixation d'un rochet de remontoir sur un arbre de barillet telle qu'elle se pratique habituellement dans des mouvements d'horlogerie de haut de gamme.
The accompanying drawing illustrates schematically and by way of example an embodiment of the assembly comprising a winding ratchet fixed on a barrel shaft.
  • The figure 1 is a top view of a high-end clockwork movement in which the winding ratchet is fixed on the barrel shaft by means of the device according to the invention.
  • The figure 2 illustrates a barrel shaft as used in the assembly made according to the invention.
  • The figure 3 is a partial section along line AA of the figure 1 showing the fixing of the winding ratchet on the barrel shaft.
  • The figure 4 illustrates in plan the barrel ratchet according to the invention.
  • The figure 5 illustrates a fixing plate of the device according to the invention.
  • The figure 6 illustrates the fixing of a winding ratchet on a barrel shaft as it is usually practiced in high-end watch movements.

Comme illustré à la figure 6, le rochet de barillet a, entraîné par un carré b formant une extrémité de l'arbre de barillet c est vissé à l'aide de vis directement dans la face terminale de l'arbre de barillet c pivoté entre la platine d et le pont de barillet e. Ce type de fixation est généralement utilisé dans les mouvements d'horlogerie haut de gamme où le rochet de remontoir est visible. Cette fixation, avec ses trois vis décalées de 120°, est très esthétique et plaît aux usagers. Par contre ce mode de fixation nécessite un grand diamètre de l'arbre de barillet, nettement plus grand que dix fois l'épaisseur du ressort de barillet ce qui est la norme, et réduit donc indûment le volume de la cage de barillet et de la réserve de marche du mouvement le ressort ayant moins de spires pour un encombrement donné du barillet.As illustrated in figure 6 , the barrel ratchet a, driven by a square b forming an end of the barrel shaft c is screwed with screws directly into the end face of the barrel shaft c pivoted between the plate d and the bridge barrel e. This type of fastener is generally used in high-end watch movements where the winding ratchet is visible. This fixing, with its three screws offset by 120 °, is very aesthetic and pleases users. By cons this method of attachment requires a large diameter of the barrel shaft, significantly larger than ten times the thickness of the barrel spring which is the norm, and therefore unduly reduces the volume of the barrel cage and the power reserve of the movement the spring having fewer turns for a given size of the barrel.

Le dispositif de fixation d'un rochet de remontoir sur un arbre de barillet, selon l'invention, permet de réaliser un ensemble ayant la même esthétique que ceux de l'art antérieur mais dont l'arbre de barillet peut avoir un plus faible diamètre, déterminé de façon optimale soit environ dix fois l'épaisseur du ressort de barillet seulement ce qui, pour une cage de barillet de diamètre déterminé, libère de l'espace et permet d'augmenter le nombre de spires du ressort de barillet et donc la réserve de marche. Le poids de l'arbre de barillet est également réduit.The device for fixing a winding ratchet on a barrel shaft according to the invention makes it possible to produce an assembly having the same aesthetic appearance as those of the prior art but whose barrel shaft may have a smaller diameter. , optimally determined is about ten times the thickness of the mainspring only, which, for a cage of a diameter of determined diameter, frees space and increases the number of turns of the mainspring and therefore the power reserve. The weight of the barrel shaft is also reduced.

Le dispositif de fixation d'un rochet de remontoir sur un axe de barillet selon la présente invention comporte un rochet particulier, un arbre de barillet dont l'extrémité portant le carré d'entraînement présente une forme particulière, une rondelle d'entraînement et des vis.The device for fixing a winding ratchet on a barrel axis according to the present invention comprises a particular ratchet, a barrel shaft whose end bearing the drive square has a particular shape, a drive washer and screw.

Le rochet de remontoir 1 illustré en plan à la figure 4 comporte une denture extérieure et une ouverture centrale 2 carrée et des taraudages 3, dans l'exemple illustré trois, uniformément répartis autour de l'axe O du rochet de remontoir 1. Dans l'exemple illustré où l'ouverture centrale est carrée et où trois vis sont prévues, l'un des taraudages 3a est axé sur un rayon du rochet 1 passant par le centre d'un côté de l'ouverture 2 et les deux autres taraudages sont situés sur des rayons du rochet 1 formant un angle de 120° avec le rayon passant par le taraudage 3a.The winding ratchet 1 shown in plan at figure 4 has an external toothing and a central opening 2 square and threads 3, in the example illustrated three, evenly distributed around the axis O of the winding ratchet 1. In the illustrated example where the central opening is square and where three screws are provided, one of the threads 3a is focused on a radius of the ratchet 1 passing through the center of one side of the opening 2 and the other two threads are located on rays of the ratchet 1 forming an angle of 120 ° with the radius passing through the tapping 3a.

L'arbre de barillet 4 comporte à l'une de ses extrémités un carré d'entraînement 5 dont les dimensions correspondent à l'ouverture centrale 2 du rochet pour pouvoir passer au travers de cette ouverture centrale 2. L'arbre de barillet 4 comporte à son extrémité comportant le carré d'entraînement 5 une gorge 6 dont le diamètre intérieur est plus faible que la longueur d'un côté du carré d'entraînement 5. Le diamètre de la portion médiane 7 de l'arbre de barillet 4 est plus grand que celui du fond de la gorge 6 mais est déterminé en fonction de l'épaisseur du ressort de barillet. Généralement, de façon optimale ce diamètre est environ égal à dix fois l'épaisseur du ressort de barillet. Cela dépend entre autre du matériau dans lequel le ressort de barillet est réalisé.The barrel shaft 4 has at one of its ends a driving square 5 whose dimensions correspond to the central opening 2 of the ratchet to be able to pass through this central opening 2. The barrel shaft 4 comprises at its end comprising the driving square 5 a groove 6 whose inner diameter is smaller than the length of one side of the drive square 5. The diameter of the middle portion 7 of the barrel shaft 4 is more large than that of the bottom of the groove 6 but is determined according to the thickness of the mainspring. Generally, optimally this diameter is approximately equal to ten times the thickness of the mainspring. This depends inter alia on the material in which the mainspring is made.

Le diamètre du fond de la gorge 6 de l'arbre de barillet 4 correspond sensiblement à la longueur d'un côté de l'ouverture centrale 2 du rochet de remontoir respectivement du carré d'entraînement 5 de l'arbre de barillet 4.The diameter of the bottom of the groove 6 of the barrel shaft 4 substantially corresponds to the length of one side of the central opening 2 of the winding ratchet respectively of the driving square 5 of the barrel shaft 4.

Le dispositif de fixation selon l'invention comporte encore une rondelle de fixation 8 comportant un passage central 9 de forme et de dimension correspondant au carré d'entraînement 5 de l'arbre de barillet et de l'ouverture centrale 2 du rochet 1. Cette rondelle de fixation 8 comporte encore des perçages 10, trois dans l'exemple illustré, en nombre égal au nombre de taraudages 3 du rochet 1. Ces perçages 10 sont uniformément répartis autour du centre O' de cette rondelle 8. Ces perçages 10 sont situés sur un cercle x de diamètre identique à celui y du rochet sur lequel les taraudages 3 sont disposés. Par contre, l'orientation de ces perçages 10 par rapport au passage central 9 de la rondelle 8 est différente de l'orientation des taraudages 3 par rapport à l'ouverture centrale 2 du rochet 1. Cette différence d'orientation est représentée par l'angle α. Ainsi, lorsque la rondelle 8 est superposée au rochet 1 et que les perçages 10 sont alignés sur les taraudages 3, l'ouverture centrale 2 du rochet 1 est décalée angulairement par rapport au passage central 9 de la rondelle 8.The fixing device according to the invention also comprises a fixing washer 8 comprising a central passage 9 of shape and dimension corresponding to the drive square 5 of the barrel shaft and the central opening 2 of the ratchet 1. This fixing washer 8 further comprises holes 10, three in the example shown, in number equal to the number of threads 3 ratchet 1. These holes 10 are uniformly distributed around the center O 'of the washer 8. These holes 10 are located on a circle x of diameter identical to that y of the ratchet on which the threads 3 are arranged. By against the orientation of these holes 10 relative to the central passage 9 of the washer 8 is different from the orientation of the threads 3 relative to the central opening 2 of the ratchet 1. This difference in orientation is represented by the angle α. Thus, when the washer 8 is superimposed on the ratchet 1 and the holes 10 are aligned with the threads 3, the central opening 2 of the ratchet 1 is angularly offset relative to the central passage 9 of the washer 8.

Le dispositif de fixation comporte encore des vis 11, trois dans l'exemple illustré, qui, en position de service passent à travers les perçages 10 de la rondelle 8 et sont vissées dans les taraudages 3 du rochet 1.The fixing device also comprises screws 11, three in the illustrated example, which, in the operating position, pass through the bores 10 of the washer 8 and are screwed into the threads 3 of the ratchet 1.

L'arbre de barillet 4 est pivoté entre la platine 12 et le pont de barillet 13 d'un mouvement d'horlogerie à l'aide de pierres 14, 15. L'arbre de barillet 4 sert de pivot à la cage de barillet formée d'un couvercle 16 et d'une boîte 17. Un ressort de barillet (non illustré) est fixé par son extrémité intérieure à la partie médiane 7 de l'arbre de barillet 4 et par sa spire extérieure à la paroi latérale de la boîte de barillet 17.The barrel shaft 4 is pivoted between the plate 12 and the barrel bridge 13 of a clockwork movement using stones 14, 15. The barrel shaft 4 serves as a pivot for the formed barrel cage of a cover 16 and a box 17. A barrel spring (not shown) is fixed by its inner end to the median part 7 of the barrel shaft 4 and by its outer turn to the side wall of the box barrel 17.

Une fois le barillet monté entre la platine 12 et le pont de barillet 13, on fait passer le carré 5 de l'axe de barillet 4 à travers l'ouverture centrale 2 du rochet 1 dont l'épaisseur est inférieure à la hauteur de la gorge 6 de l'axe de barillet 4. On fait pivoter ensuite ce rochet 1 par rapport à l'arbre de barillet 4 d'un angle α. De cette façon l'ouverture centrale 2 carrée du rochet n'est plus alignée sur le carré 5 de l'arbre de barillet 4.Once the barrel mounted between the plate 12 and the barrel bridge 13, the square 5 of the barrel axis 4 is passed through the central opening 2 of the ratchet 1 whose thickness is less than the height of the barrel. 6 throat of the barrel axis 4. On then rotates this ratchet 1 relative to the barrel shaft 4 by an angle α. In this way the square central opening 2 of the ratchet is no longer aligned on the square 5 of the barrel shaft 4.

On place ensuite le carré 5 de l'arbre de barillet 4 dans le passage carré de la rondelle de fixation 8. Les taraudages 3 du rochet 1 sont ensuite alignés sur les perçages 10 de la rondelle de fixation 8 et les vis 11 sont vissées dans les taraudages 3 du rochet serrant cette plaque de fixation 8 contre le rochet 1 et le rendant donc solidaire en rotation de l'arbre de barillet 4 par le biais du carré 5 engagé dans le passage central 9 de la rondelle de fixation 8. Le rochet est simultanément limité dans ses déplacements axiaux par rapport à l'axe de barillet par la face inférieure du carré 5 de cet arbre de barillet et par l'épaulement 18 de cet arbre de barillet définissant la hauteur de la gorge 6.The square 5 of the barrel shaft 4 is then placed in the square passage of the fixing washer 8. The threads 3 of the ratchet 1 are then aligned with the bores 10 of the fixing washer 8 and the screws 11 are screwed into the threads 3 of the ratchet tightening this fixing plate 8 against the ratchet 1 and thus making it integral in rotation with the barrel shaft 4 by means of the square 5 engaged in the central passage 9 of the fixing washer 8. The ratchet is simultaneously limited in its axial displacements with respect to the barrel axis by the lower face of the square 5 of this barrel shaft and by the shoulder 18 of this barrel shaft defining the height of the groove 6.

Grâce à ce mode de fixation du rochet 1 sur l'extrémité de l'arbre de barillet 4, le diamètre de l'arbre de barillet 4 peut être réduit, les vis de fixation 11 du rochet 1 ne devant plus être vissées dans l'extrémité de l'arbre de barillet 4. Le diamètre de la partie médiane 7 de l'arbre de barillet peut ainsi être déterminé en fonction de l'épaisseur du ressort de barillet, généralement de l'ordre de dix fois l'épaisseur dudit ressort de barillet, ce qui conduit à une forte réduction du diamètre de cette partie médiane 7 de l'arbre de barillet par rapport aux arbres de barillet conventionnels (voir figure 6). Ainsi, l'espace disponible pour le ressort de barillet dans la boîte de barillet 17 est plus grand, le ressort peut avoir plus de spires et la réserve de marche du mouvement est augmentée pour un même encombrement total du barillet. Le poids de l'arbre de barillet est diminué.With this method of attachment of the ratchet 1 on the end of the barrel shaft 4, the diameter of the barrel shaft 4 can be reduced, the fastening screws 11 of the ratchet 1 no longer need to be screwed into the barrel. end of the barrel shaft 4. The diameter of the central portion 7 of the barrel shaft can thus be determined according to the thickness of the mainspring, generally of the order of ten times the thickness of said spring of barrel, which leads to a sharp reduction in the diameter of this middle portion 7 of the barrel shaft relative to the conventional barrel shafts (see figure 6 ). Thus, the space available for the mainspring in the barrel box 17 is larger, the spring can have more turns and the power reserve of the movement is increased for the same total size of the barrel. The weight of the barrel shaft is decreased.

Dans des variantes, la forme de l'extrémité 5 de l'arbre de barillet 4 pourrait ne pas être carrée mais ovale ou polygonale, d'une façon générale non circulaire, pour autant que la forme de l'ouverture centrale 2 du rochet 1 et du passage central 9 de la plaquette de fixation 8 soit de forme correspondante.In variants, the shape of the end 5 of the barrel shaft 4 may not be square but oval or polygonal, generally non-circular, provided that the shape of the central opening 2 of the ratchet 1 and the central passage 9 of the fixing plate 8 is of corresponding shape.

Dans l'exécution décrite, l'arbre de barillet 4 comporte une partie médiane 7 recevant la spire interne d'un ressort de barillet (non illustré). D'un côté de cette partie médiane 7 l'arbre de barillet comporte une première partie cylindrique 19 servant de palier à la boîte de barillet 17 et se terminant par un premier tourillon 20 pivoté dans la platine 12 d'un mouvement par la pierre 14. De l'autre côté de cette partie médiane 7 l'arbre de barillet 4 présente une seconde partie cylindrique 21 servant de palier au couvercle de barillet 16 suivie d'un second tourillon 22 pivotant dans le pont de barillet 13 à l'aide de la pierre 15. Ce second tourillon 22 se prolonge par la partie de l'arbre de barillet 4, comportant la gorge 6 et se termine par l'organe d'entraînement du rochet 1, ici le carré 5.In the embodiment described, the barrel shaft 4 comprises a median portion 7 receiving the inner coil of a barrel spring (not shown). On one side of this middle portion 7 the barrel shaft has a first cylindrical portion 19 serving as a bearing on the barrel box 17 and ending with a first pin 20 pivoted in the plate 12 by a movement by the stone 14. On the other side this middle portion 7 the barrel shaft 4 has a second cylindrical portion 21 serving as a bearing barrel cover 16 followed by a second pin 22 pivoting in the barrel bridge 13 with the stone 15. This second trunnion 22 is extended by the portion of the barrel shaft 4, having the groove 6 and ends with the ratchet 1 driving member, here the square 5.

Le nombre de vis de fixation 11 de la rondelle de fixation 8 sur le rochet 1 peut être différent de trois, par exemple deux, quatre ou cinq, mais au minimum une.The number of fastening screws 11 of the fastening washer 8 on the ratchet 1 may be different from three, for example two, four or five, but at least one.

Claims (6)

  1. Unit that is formed by a winding ratchet (1) and a barrel arbor (4), said ratchet (1) comprising at least one off-centered tapping (3) relative to the ratchet by a determined distance (1), characterized by the fact that one of the ends of the barrel arbor (4) comprises a driving formation (5) that is non-circular in shape as well as a groove (6) that is adjacent to this driving formation that defines a small-section portion of the barrel arbor (4) whose shape and dimensions are such that they extend into the section of the driving formation (5), whereby a shoulder (18) of the barrel arbor limits the height of said groove (6) from the side facing said driving formation (5); by the fact that the ratchet (1) comprises a central opening (2) with a shape and dimension corresponding to the driving formation (5) of the barrel arbor (4); by the fact that it comprises an attachment washer (8) that has a central passage (9) with a shape and dimension that correspond to the driving formation (5) of the barrel arbor (4) and in which said driving formation (5) is engaged in assembled position, as well as at least one off-centered piercing (10) relative to said washer by a predetermined distance that is equal to the off-centering (1) of said at least one tapping (3) of the ratchet (1); by the fact that it also comprises at least one screw (11) that makes it possible to screw the attachment washer (8) on the ratchet (1); and by the fact that the angular position of said at least one tapping (3) of the ratchet (1) relative to an axis of symmetry (X-X) of its central opening (2) is different from an angle (α) of the angular position that said at least one piercing (10) of the attachment washer (8) exhibits relative to the corresponding axis of symmetry (Y-Y) of the central passage (9) of this attachment washer (8).
  2. Unit according to claim 1, wherein the driving formation (5) of the barrel arbor is a square.
  3. Unit according to claim 2, wherein the central opening (2) of the ratchet (1) and the central passage (9) of the attachment washer (8) are square in shape and with a size that corresponds to the square (5) of the barrel arbor (4).
  4. Unit according to claim 1 to 3, wherein the number of tappings (3) of the ratchet (1), the number of piercings (10) of the attachment washer (8), and the number of screws (11) is equal to three.
  5. Unit according to one of the preceding claims, wherein the thickness of the ratchet (1) corresponds to the height of the groove (6) of the barrel arbor (4).
  6. Barrel arbor for use in the unit according to claim 1, said barrel arbor comprising a median part (7), that is intended to accommodate the internal coil of a barrel spring, that is located between two cylindrical portions (19, 21) that serve as a bearing for the box (17) and the cover (16) of a barrel, whereby one (19) of these cylindrical portions is terminated by a pivot (20) forming one of the ends of the barrel arbor (4) that is intended to pivot the barrel arbor in a plate (12) of a clock movement; and wherein the other one (21) of these cylindrical portions is separated by a driving formation (5) that is non-circular in shape and that forms the other end of the barrel arbor (4) by a groove (6), intended to accomodate a ratchet (1), whose inside diameter is less than the circle that is inscribed in the form of the driving formation (5).
EP09011789.6A 2008-12-15 2009-09-16 Anordnung mit einem Sperrad zum Aufziehen, das an einer Federhauswelle befestigt ist, und Federhauswelle für diese Anordnung Not-in-force EP2196866B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH01962/08A CH700058B1 (en) 2008-12-15 2008-12-15 Assembly including a winding ratchet attached to a barrel arbor and barrel shaft for this set.

Publications (3)

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EP2196866A2 EP2196866A2 (en) 2010-06-16
EP2196866A3 EP2196866A3 (en) 2016-11-30
EP2196866B1 true EP2196866B1 (en) 2018-08-01

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EP09011789.6A Not-in-force EP2196866B1 (en) 2008-12-15 2009-09-16 Anordnung mit einem Sperrad zum Aufziehen, das an einer Federhauswelle befestigt ist, und Federhauswelle für diese Anordnung

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US (1) US8038341B2 (en)
EP (1) EP2196866B1 (en)
CH (1) CH700058B1 (en)
ES (1) ES2690729T3 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2570861A1 (en) * 2011-09-15 2013-03-20 ETA SA Manufacture Horlogère Suisse Clock barrel assembly with reduced core diameter
EP2570863B1 (en) * 2011-09-15 2017-11-08 Blancpain S.A. Clock barrel assembly with reduced core diameter
EP2570864B1 (en) 2011-09-15 2018-11-14 Blancpain S.A. Clock barrel with reduced core diameter
EP2746865B1 (en) * 2012-12-18 2016-03-02 ETA SA Manufacture Horlogère Suisse Timepiece barrel
EP2746867B1 (en) * 2012-12-18 2015-12-16 ETA SA Manufacture Horlogère Suisse Timepiece barrel
EP2871537B1 (en) * 2013-11-06 2017-01-04 ETA SA Manufacture Horlogère Suisse Watch with improved power reserve
JP6874341B2 (en) * 2016-11-22 2021-05-19 セイコーエプソン株式会社 How to operate the drive mechanism for watches, mechanical watches and royal fern
EP3872576B1 (en) * 2020-02-25 2024-02-21 ETA SA Manufacture Horlogère Suisse Timepiece barrel with twisted arbor

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Publication number Priority date Publication date Assignee Title
US424185A (en) * 1890-03-25 Lewis donne and morgan donne
US808176A (en) * 1903-01-21 1905-12-26 Gustave Thalhofer Watch-barrel.
US1339941A (en) * 1916-07-10 1920-05-11 Edward R Hills Watch-barrel
US2903844A (en) * 1954-07-10 1959-09-15 Paul E Reymond Winding up mechanism for time-pieces
US3119227A (en) * 1958-02-06 1964-01-28 Ebauchesfabrik Eta Ag Barrel arbor and ratchet wheel arrangement for watches
CH566044A (en) * 1972-12-18 1975-08-29
CH591104A (en) * 1973-11-21 1977-09-15
JPS50122264U (en) * 1974-03-22 1975-10-06
CH1357474A4 (en) * 1974-10-09 1976-08-13

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Also Published As

Publication number Publication date
US20100149928A1 (en) 2010-06-17
EP2196866A3 (en) 2016-11-30
CH700058A2 (en) 2010-06-15
EP2196866A2 (en) 2010-06-16
ES2690729T3 (en) 2018-11-22
US8038341B2 (en) 2011-10-18
CH700058B1 (en) 2013-09-13

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