EP1857891A1 - Hairspring-collet assembly for a timepiece movement - Google Patents

Hairspring-collet assembly for a timepiece movement Download PDF

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Publication number
EP1857891A1
EP1857891A1 EP06010169A EP06010169A EP1857891A1 EP 1857891 A1 EP1857891 A1 EP 1857891A1 EP 06010169 A EP06010169 A EP 06010169A EP 06010169 A EP06010169 A EP 06010169A EP 1857891 A1 EP1857891 A1 EP 1857891A1
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EP
European Patent Office
Prior art keywords
spiral
assembly according
ferrule
ferrule assembly
point
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.)
Withdrawn
Application number
EP06010169A
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German (de)
French (fr)
Inventor
désignation de l'inventeur n'a pas encore été déposée La
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Patek Philippe SA Geneve
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Patek Philippe SA Geneve
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Patek Philippe SA Geneve filed Critical Patek Philippe SA Geneve
Priority to EP06010169A priority Critical patent/EP1857891A1/en
Priority to CN2007800031968A priority patent/CN101375218B/en
Priority to JP2009510564A priority patent/JP5235869B2/en
Priority to EP07734401.8A priority patent/EP2018601B1/en
Priority to US12/085,663 priority patent/US7758237B2/en
Priority to PCT/IB2007/001083 priority patent/WO2007132306A2/en
Publication of EP1857891A1 publication Critical patent/EP1857891A1/en
Withdrawn legal-status Critical Current

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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
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/32—Component parts or constructional details, e.g. collet, stud, virole or piton
    • G04B17/34—Component parts or constructional details, e.g. collet, stud, virole or piton for fastening the hairspring onto the balance
    • G04B17/345—Details of the spiral roll
    • 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
    • G04B43/00—Protecting clockworks by shields or other means against external influences, e.g. magnetic fields
    • G04B43/002—Component shock protection arrangements

Definitions

  • the present invention relates to a spiral-ferrule assembly for a watch movement, more specifically a spiral whose inner end is attached to a ferrule, ferrule which can be driven on the axis of a balance to form the movement control device .
  • the present invention aims to provide a spiral-ferrule assembly designed to reduce the risk of damaging the balance spring during an impact.
  • a spiral-ferrule assembly for a watch movement comprises a ferrule 1 intended to be mounted on a balance shaft 2 and a spiral 3 attached by its end.
  • the spiral 3 is partially shown, only its inner turn being visible.
  • the ferrule 1 comprises three elastic arms 4 arranged in a triangle.
  • the elastic arms 4 define an equilateral triangular central opening 5 whose diameter of the inscribed circle is slightly smaller than the diameter of a cylindrical or slightly conical bearing surface 6 of the axis 2, so that the axis 2 can be driven into the ferrule 1, hunting which elastically deforms the arms 4 to the outside. Due to its triangular shape, the outline of the opening 5 defines three discrete contact points 7 with the axis 2.
  • the width L of each arm 4 is variable, in the manner of the elastic arms of the shell according to the document EP 1 637 940 , to make more homogeneous the distribution of the stresses exerted in this arm 4 by the axis 2.
  • the point 8 joining the hairspring 3 and the collar 1 is defined by one, 9c, of the three zones 9a, 9b and 9c of junction between the arms 4.
  • the inner end of the spiral 3 is integral with the axis 2 and thus follows the oscillating movements of the balance.
  • the outer end of the hairspring 3, not shown, is fixed by a pin to a fixed part of the movement, typically the rooster, in a known manner.
  • the ferrule 1 is preferably formed integrally with the spiral 3.
  • the spiral-ferrule assembly 1, 3 is typically made of a brittle material, that is to say in a material that can not deform plastically , such as a material based on silicon, glass, quartz or diamond.
  • a suitable manufacturing method for the spiral-ferrule assembly 1, 3 is the DRIE process (Deep Reaction Ion Etching).
  • the spiral-ferrule assembly 1, 3 may however, alternatively, be made of a ductile material, such as a metal material.
  • discrete portions 10a, 10b and 10c of the outer contour of the ferrule 1 constitute abutments against which the inner coil of the spiral 3 can come to bear during an impact suffered by the movement.
  • These stops 10a, 10b and 10c are defined by the zones 9a, 9b and 9c of junction between the elastic arms 4 and are thus arranged in an angular distribution substantially regular.
  • These abutments 10a, 10b and 10c are located, respectively, at distances Ra, Rb and Rc from the center O of the axis 2 in the plane of the ferrule 1, and more precisely have an arcuate shape with a center O and of Ra, Rb and Rc respectively.
  • the distances or radii Ra, Rb and Rc are chosen sufficiently small so that the hairspring 3 is not obstructed by the abutments 10a, 10b and 10c during normal oscillations of the pendulum and sufficiently large to, in the event of impact suffered by the movement, allow the inner coil of the spiral 3 to come to bear against one or more stops 10a, 10b and 10c before the elastic limit of this inner coil, at any point of this turn including at the junction point 8, exceeded ( Figure 2).
  • the inner turn bears against one or more abutments 10a, 10b and 10c under the effect of a shock, each of the other turns may come to bear against the turn which precedes it.
  • the risk of damage to the hairspring 3 by breaking, in cases where the hairspring 3 is made of a brittle material, or by permanent deformation, in cases where the hairspring 3 is made of a ductile material, are thus reduced.
  • the distances or radii Ra, Rb and Rc grow in the winding direction of the spiral 3 going from the inside to the outside from the junction point 8 of the spiral 3 to the ferrule 1, this to take account because the radius of the inner turn of the spiral 3, like that of all the other turns, increases in this direction D.
  • the stop 10a closest to the junction point 8 in the direction D is at a distance Ra from center O which is smaller than the distance Rb separating the next stop 10b from the center O, which is smaller than the distance Rc separating the next stop 10c from the center O.
  • the distance R8 separating the point 8 of junction between the hairspring 3 and the ferrule 1 of the center O is it typically greater than or equal to the distance Ra and less than the distances Rb and Rc.
  • the distances Ra, Rb and Rc are determined by defining a certain number of radial forces F oriented towards the center O, by calculating, for example by the finite element method, the maximum elastic deformation that can be to undergo the inner turn under the effect of each of the radial forces F, and choosing distances Ra, Rb and Rc sufficiently large that this maximum elastic deformation can not be reached, or at least not exceeded, and sufficiently small that the hairspring 3 does not touch the stops 10a, 10b and 10c during normal operation.
  • the deformation of the inner turn of the hairspring 3 at each of the points 3a, 3b and 3c situated opposite the stops 10a, 10b and 10c respectively, in a configuration where this point bears against the corresponding stop 10a, 10b or 10c under the effect of a radial force F applied at this point, is thus a percentage, less than or equal to 100%, of the maximum elastic deformation that can undergo the inner turn at this point, which confers a safety factor greater than or equal to This percentage is preferably substantially the same for all abutments 10a, 10b and 10c.
  • this percentage is about 50% (safety factor of about 2), while the percentage of deformation of the inner coil in normal operation of the hairspring relative to the maximum elastic deformation this inner turn is about 25%, this for a spiral pitch 3 of about 93 microns and a thickness or width of spiral turns 3 of about 30 microns.
  • the distances Ra, Rb and Rc are equal to the same percentage, respectively, of the rays r, rb and corresponding rc of the inner turn at rest, that is to say distances between the points 3a, 3b, 3c and the center O.
  • This percentage is for example equal to about 90%, for a step of the spiral 3 of about 93 microns and a thickness or width of the coils of the spiral 3 of about 30 microns.
  • FIG. 3 shows another embodiment of the invention, in which the ferrule 1 comprises, in addition to the abutments 10a, 10b, 10c defined by the zones 9a, 9b, 9c of junction between the arms 4, stops 10d, 10e. , 10f defined by elements 11 protruding radially from the outer side of the arms 4 in the central region of the arms 4 in contact with the axis 2.
  • the stops 10a, 10b, 10c the abutments 10d, 10e, 10f are in a central arc of the center. center O of the axis 2.
  • the opening 5 of the ferrule 1 in which the axis 2 is driven may have a shape other than triangular, such as another polygonal shape, regular or not, defined by a number of elastic arms greater than three.
  • the ferrule could be in the form of a split ring having radial projections defining the stops.
  • the abutments could be contiguous rather than discrete, and more particularly a large continuous portion of the outer contour of the ferrule could serve as a stop.
  • the outer contour would then have a shape similar to that of the inner coil, that is to say a radius increasing in the direction D of winding of the spiral going from the inside to the outside from the point of junction between the spiral and the ferrule.
  • the outer contour could in this case be defined by a frame surrounding elastic arms, or could be the outline of a ferrule "full", without lights of elasticity.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Springs (AREA)
  • Toys (AREA)
  • Gripping On Spindles (AREA)

Abstract

The assembly has a spiral (3) attached to a collet (1) by its internal end, where the collet is mounted on a spindle (2) and the assembly is made of material with the base of silicon. The collet has an external contour defining stops (10a-10c). The spiral has internal turns supported on the stops during an impact before an elastic limit of the internal turn is exceeded. The stops are located at respective distances (Ra-Rc) from the center (O) of the spindle, where the distances are increased in a direction (D) of the spiral from a spiral/collet junction point (8).

Description

La présente invention concerne un ensemble spiral-virole pour mouvement d'horlogerie, plus précisément un spiral dont l'extrémité intérieure est rattachée à une virole, virole qui peut être chassée sur l'axe d'un balancier pour former le dispositif régulateur du mouvement.The present invention relates to a spiral-ferrule assembly for a watch movement, more specifically a spiral whose inner end is attached to a ferrule, ferrule which can be driven on the axis of a balance to form the movement control device .

On sait que lorsqu'une montre subit un choc, le spiral du dispositif régulateur peut se déformer au-delà de sa limite élastique et ainsi subir une déformation permanente, qui nuira à son fonctionnement, ou même se rompre si la matière dans laquelle il est constitué est une matière fragile telle que le silicium.It is known that when a watch is shocked, the spiral of the regulating device may deform beyond its elastic limit and thus undergo permanent deformation, which will impair its operation, or even break if the material in which it is formed is a brittle material such as silicon.

La présente invention vise à proposer un ensemble spiral-virole conçu pour réduire le risque d'endommagement du spiral lors d'un choc.The present invention aims to provide a spiral-ferrule assembly designed to reduce the risk of damaging the balance spring during an impact.

A cette fin il est prévu un ensemble spiral-virole selon la revendication 1 annexée, des modes de réalisation particuliers étant définis dans les revendications dépendantes 2 à 14. La présente invention propose également un mouvement d'horlogerie incorporant cet ensemble spiral-virole.For this purpose there is provided a spiral-ferrule assembly according to claim 1 attached, particular embodiments being defined in the dependent claims 2 to 14. The present invention also provides a clockwork incorporating this spiral-ferrule assembly.

D'autres caractéristiques et avantages de la présente invention apparaîtront à la lecture de la description détaillée suivante faite en référence aux dessins annexés dans lesquels :

  • la figure 1 montre un ensemble spiral-virole selon l'invention en position de repos ;
  • la figure 2 montre l'ensemble spiral-virole de la figure 1 lors d'un choc ;
  • la figure 3 montre un ensemble spiral-virole selon un autre mode de réalisation de l'invention en position de repos.
Other features and advantages of the present invention will appear on reading the following detailed description given with reference to the accompanying drawings in which:
  • Figure 1 shows a spiral-ferrule assembly according to the invention in the rest position;
  • FIG. 2 shows the spiral-ferrule assembly of FIG. 1 during an impact;
  • Figure 3 shows a spiral-ferrule assembly according to another embodiment of the invention in the rest position.

En référence aux figures 1 et 2, un ensemble spiral-virole pour mouvement d'horlogerie selon un premier mode de réalisation de l'invention comprend une virole 1 destinée à être montée sur un axe de balancier 2 et un spiral 3 rattaché par son extrémité intérieure à la virole 1. Sur les figures, le spiral 3 est représenté partiellement, seule sa spire intérieure étant visible.With reference to FIGS. 1 and 2, a spiral-ferrule assembly for a watch movement according to a first embodiment of the invention comprises a ferrule 1 intended to be mounted on a balance shaft 2 and a spiral 3 attached by its end. In the figures, the spiral 3 is partially shown, only its inner turn being visible.

La virole 1 comprend trois bras élastiques 4 disposés en triangle. Les bras élastiques 4 définissent une ouverture centrale triangulaire équilatérale 5 dont le diamètre du cercle inscrit est légèrement inférieur au diamètre d'une portée cylindrique ou légèrement conique 6 de l'axe 2, de sorte que l'axe 2 peut être chassé dans la virole 1, chassage qui déforme élastiquement les bras 4 vers l'extérieur. De par sa forme triangulaire, le contour de l'ouverture 5 définit trois points de contact discrets 7 avec l'axe 2. La largeur L de chaque bras 4 est variable, à la manière des bras élastiques de la virole selon le document EP 1 637 940 , pour rendre plus homogène la répartition des contraintes exercées dans ce bras 4 par l'axe 2.The ferrule 1 comprises three elastic arms 4 arranged in a triangle. The elastic arms 4 define an equilateral triangular central opening 5 whose diameter of the inscribed circle is slightly smaller than the diameter of a cylindrical or slightly conical bearing surface 6 of the axis 2, so that the axis 2 can be driven into the ferrule 1, hunting which elastically deforms the arms 4 to the outside. Due to its triangular shape, the outline of the opening 5 defines three discrete contact points 7 with the axis 2. The width L of each arm 4 is variable, in the manner of the elastic arms of the shell according to the document EP 1 637 940 , to make more homogeneous the distribution of the stresses exerted in this arm 4 by the axis 2.

Le point 8 de jonction du spiral 3 et de la virole 1 est défini par l'une, 9c, des trois zones 9a, 9b et 9c de jonction entre les bras 4. Lorsque la virole 1 est chassée sur l'axe 2, l'extrémité intérieure du spiral 3 est solidaire de l'axe 2 et suit donc les mouvements oscillants du balancier. L'extrémité extérieure du spiral 3, non représentée, est elle fixée par un piton à une pièce fixe du mouvement, typiquement le coq, de manière connue.The point 8 joining the hairspring 3 and the collar 1 is defined by one, 9c, of the three zones 9a, 9b and 9c of junction between the arms 4. When the shell 1 is driven on the axis 2, the inner end of the spiral 3 is integral with the axis 2 and thus follows the oscillating movements of the balance. The outer end of the hairspring 3, not shown, is fixed by a pin to a fixed part of the movement, typically the rooster, in a known manner.

La virole 1 est de préférence formée d'un seul tenant avec le spiral 3. L'ensemble spiral-virole 1, 3 est typiquement réalisé en une matière fragile, c'est-à-dire en une matière qui ne peut se déformer plastiquement, telle qu'une matière à base de silicium, verre, quartz ou diamant. Dans le cas du silicium, notamment, un procédé de fabrication approprié pour l'ensemble spiral-virole 1, 3 est le procédé DRIE (Deep Reaction Ion Etching). L'ensemble spiral-virole 1, 3 peut néanmoins, en variante, être réalisé dans une matière ductile, telle qu'une matière métallique.The ferrule 1 is preferably formed integrally with the spiral 3. The spiral-ferrule assembly 1, 3 is typically made of a brittle material, that is to say in a material that can not deform plastically , such as a material based on silicon, glass, quartz or diamond. In the case of silicon, in particular, a suitable manufacturing method for the spiral-ferrule assembly 1, 3 is the DRIE process (Deep Reaction Ion Etching). The spiral-ferrule assembly 1, 3 may however, alternatively, be made of a ductile material, such as a metal material.

Conformément à l'invention, des parties discrètes 10a, 10b et 10c du contour externe de la virole 1 constituent des butées contre lesquelles la spire intérieure du spiral 3 peut venir s'appuyer lors d'un choc subi par le mouvement. Ces butées 10a, 10b et 10c sont définies par les zones 9a, 9b et 9c de jonction entre les bras élastiques 4 et sont ainsi disposées selon une répartition angulaire sensiblement régulière. Ces butées 10a, 10b et 10c sont situées, respectivement, à des distances Ra, Rb et Rc du centre O de l'axe 2 dans le plan de la virole 1, et ont plus précisément une forme en arc de cercle de centre O et de rayons Ra, Rb et Rc respectivement. Les distances ou rayons Ra, Rb et Rc sont choisis suffisamment petits pour que le spiral 3 ne soit pas gêné par les butées 10a, 10b et 10c lors des oscillations normales du balancier et suffisamment grands pour, en cas de choc subi par le mouvement, permettre à la spire intérieure du spiral 3 de venir s'appuyer contre une ou plusieurs des butées 10a, 10b et 10c avant que la limite élastique de cette spire intérieure, en tout point de cette spire y compris au niveau du point de jonction 8, soit dépassée (figure 2). Lorsque la spire intérieure est en appui contre une ou plusieurs des butées 10a, 10b et 10c sous l'effet d'un choc, chacune des autres spires peut venir s'appuyer contre la spire qui la précède. Les risques d'endommagement du spiral 3 par rupture, dans les cas où le spiral 3 est en une matière fragile, ou par déformation permanente, dans les cas où le spiral 3 est en une matière ductile, sont ainsi réduits.According to the invention, discrete portions 10a, 10b and 10c of the outer contour of the ferrule 1 constitute abutments against which the inner coil of the spiral 3 can come to bear during an impact suffered by the movement. These stops 10a, 10b and 10c are defined by the zones 9a, 9b and 9c of junction between the elastic arms 4 and are thus arranged in an angular distribution substantially regular. These abutments 10a, 10b and 10c are located, respectively, at distances Ra, Rb and Rc from the center O of the axis 2 in the plane of the ferrule 1, and more precisely have an arcuate shape with a center O and of Ra, Rb and Rc respectively. The distances or radii Ra, Rb and Rc are chosen sufficiently small so that the hairspring 3 is not obstructed by the abutments 10a, 10b and 10c during normal oscillations of the pendulum and sufficiently large to, in the event of impact suffered by the movement, allow the inner coil of the spiral 3 to come to bear against one or more stops 10a, 10b and 10c before the elastic limit of this inner coil, at any point of this turn including at the junction point 8, exceeded (Figure 2). When the inner turn bears against one or more abutments 10a, 10b and 10c under the effect of a shock, each of the other turns may come to bear against the turn which precedes it. The risk of damage to the hairspring 3 by breaking, in cases where the hairspring 3 is made of a brittle material, or by permanent deformation, in cases where the hairspring 3 is made of a ductile material, are thus reduced.

Avantageusement, les distances ou rayons Ra, Rb et Rc croissent dans le sens D d'enroulement du spiral 3 allant de l'intérieur vers l'extérieur à partir du point 8 de jonction du spiral 3 à la virole 1, ceci pour tenir compte du fait que le rayon de la spire intérieure du spiral 3, comme celui de toutes les autres spires, croît dans ce sens D. Ainsi, la butée 10a la plus proche du point de jonction 8 dans le sens D est à une distance Ra du centre O qui est plus petite que la distance Rb séparant la butée suivante 10b du centre O, laquelle est plus petite que la distance Rc séparant la butée suivante 10c du centre O. La distance R8 séparant le point 8 de jonction entre le spiral 3 et la virole 1 du centre O est elle typiquement supérieure ou égale à la distance Ra et inférieure aux distances Rb et Rc.Advantageously, the distances or radii Ra, Rb and Rc grow in the winding direction of the spiral 3 going from the inside to the outside from the junction point 8 of the spiral 3 to the ferrule 1, this to take account because the radius of the inner turn of the spiral 3, like that of all the other turns, increases in this direction D. Thus, the stop 10a closest to the junction point 8 in the direction D is at a distance Ra from center O which is smaller than the distance Rb separating the next stop 10b from the center O, which is smaller than the distance Rc separating the next stop 10c from the center O. The distance R8 separating the point 8 of junction between the hairspring 3 and the ferrule 1 of the center O is it typically greater than or equal to the distance Ra and less than the distances Rb and Rc.

Les distances Ra, Rb et Rc sont déterminées en définissant un certain nombre de forces radiales F orientées vers le centre O, en calculant, par exemple par la méthode des éléments finis, la déformation élastique maximale que peut subir la spire intérieure sous l'effet de chacune des forces radiales F, et en choisissant des distances Ra, Rb et Rc suffisamment grandes pour que cette déformation élastique maximale ne puisse pas être atteinte, ou au moins pas dépassée, et suffisamment petite pour que le spiral 3 ne touche pas les butées 10a, 10b et 10c lors de son fonctionnement normal.The distances Ra, Rb and Rc are determined by defining a certain number of radial forces F oriented towards the center O, by calculating, for example by the finite element method, the maximum elastic deformation that can be to undergo the inner turn under the effect of each of the radial forces F, and choosing distances Ra, Rb and Rc sufficiently large that this maximum elastic deformation can not be reached, or at least not exceeded, and sufficiently small that the hairspring 3 does not touch the stops 10a, 10b and 10c during normal operation.

La déformation de la spire intérieure du spiral 3 en chacun des points 3a, 3b et 3c situés en regard des butées 10a, 10b et 10c respectivement, dans une configuration où ce point est en appui contre la butée correspondante 10a, 10b ou 10c sous l'effet d'une force radiale F appliquée en ce point, est ainsi un pourcentage, inférieur ou égal à 100%, de la déformation élastique maximale que peut subir la spire intérieure en ce point, ce qui confère un facteur de sécurité supérieur ou égal à 1. Ce pourcentage est de préférence sensiblement le même pour toutes les butées 10a, 10b et 10c. Dans un exemple de réalisation de l'invention, ce pourcentage est d'environ 50% (facteur de sécurité d'environ 2), tandis que le pourcentage de déformation de la spire intérieure en fonctionnement normal du spiral par rapport à la déformation élastique maximale de cette spire intérieure est d'environ 25%, ceci pour un pas du spiral 3 d'environ 93 µm et une épaisseur ou largeur des spires du spiral 3 d'environ 30 µm.The deformation of the inner turn of the hairspring 3 at each of the points 3a, 3b and 3c situated opposite the stops 10a, 10b and 10c respectively, in a configuration where this point bears against the corresponding stop 10a, 10b or 10c under the the effect of a radial force F applied at this point, is thus a percentage, less than or equal to 100%, of the maximum elastic deformation that can undergo the inner turn at this point, which confers a safety factor greater than or equal to This percentage is preferably substantially the same for all abutments 10a, 10b and 10c. In an exemplary embodiment of the invention, this percentage is about 50% (safety factor of about 2), while the percentage of deformation of the inner coil in normal operation of the hairspring relative to the maximum elastic deformation this inner turn is about 25%, this for a spiral pitch 3 of about 93 microns and a thickness or width of spiral turns 3 of about 30 microns.

Dans une variante de réalisation simplifiée, basée sur une approximation linéaire de la déformation de la spire intérieure en fonction de la position sur cette spire, les distances Ra, Rb et Rc sont égales à un même pourcentage, respectivement, des rayons ra, rb et rc correspondants de la spire intérieure au repos, c'est-à-dire des distances entre les points 3a, 3b, 3c et le centre O. Ce pourcentage est par exemple égal à environ 90%, pour un pas du spiral 3 d'environ 93 µm et une épaisseur ou largeur des spires du spiral 3 d'environ 30 µm.In a simplified embodiment, based on a linear approximation of the deformation of the inner turn as a function of the position on this turn, the distances Ra, Rb and Rc are equal to the same percentage, respectively, of the rays r, rb and corresponding rc of the inner turn at rest, that is to say distances between the points 3a, 3b, 3c and the center O. This percentage is for example equal to about 90%, for a step of the spiral 3 of about 93 microns and a thickness or width of the coils of the spiral 3 of about 30 microns.

La figure 3 montre un autre mode de réalisation de l'invention, dans lequel la virole 1 comporte, outre les butées 10a, 10b, 10c définies par les zones 9a, 9b, 9c de jonction entre les bras 4, des butées 10d, 10e, 10f définies par des éléments 11 faisant saillie radialement depuis le côté extérieur des bras 4 dans la zone centrale des bras 4 en contact avec l'axe 2. Comme les butées 10a, 10b, 10c, les butées 10d, 10e, 10f sont en arc de cercle de centre le centre O de l'axe 2. Les distances respectives Ra à Rf entre les butées 10a à 10f et le centre O sont croissantes dans le sens D du spiral allant de l'intérieur vers l'extérieur depuis le point 8 de jonction entre le spiral 3 et le virole 1, en d'autres termes Rd < Ra < Re < Rb < Rf < Rc.FIG. 3 shows another embodiment of the invention, in which the ferrule 1 comprises, in addition to the abutments 10a, 10b, 10c defined by the zones 9a, 9b, 9c of junction between the arms 4, stops 10d, 10e. , 10f defined by elements 11 protruding radially from the outer side of the arms 4 in the central region of the arms 4 in contact with the axis 2. As the stops 10a, 10b, 10c, the abutments 10d, 10e, 10f are in a central arc of the center. center O of the axis 2. The respective distances Ra to Rf between the stops 10a to 10f and the center O are increasing in the direction D of the spiral going from the inside to the outside from the point 8 of junction between the hairspring 3 and the shell 1, in other words Rd <Ra <Re <Rb <Rf <Rc.

La présente invention n'est nullement limitée aux modes de réalisation décrits ci-dessus. Il va de soi en effet que des modifications pourraient être faites sans sortir du cadre de l'invention revendiquée. Par exemple, l'ouverture 5 de la virole 1 dans laquelle est chassée l'axe 2 pourrait avoir une forme autre que triangulaire, telle qu'une autre forme polygonale, régulière ou non, définie par un nombre de bras élastiques supérieur à trois. Dans une autre variante, la virole pourrait se présenter sous la forme d'un anneau fendu comportant des saillies radiales définissant les butées. Dans une autre variante encore, les butées pourraient être contiguës plutôt que discrètes, et plus particulièrement une grande partie continue du contour externe de la virole pourrait servir de butée. Le contour externe aurait alors une forme similaire à celle de la spire intérieure, c'est-à-dire un rayon croissant dans le sens D d'enroulement du spiral allant de l'intérieur vers l'extérieur depuis le point de jonction entre le spiral et la virole. Le contour externe pourrait dans ce cas être défini par un cadre entourant des bras élastiques, ou pourrait être le contour d'une virole « pleine », sans lumières d'élasticité.The present invention is not limited to the embodiments described above. It goes without saying that modifications could be made without departing from the scope of the claimed invention. For example, the opening 5 of the ferrule 1 in which the axis 2 is driven may have a shape other than triangular, such as another polygonal shape, regular or not, defined by a number of elastic arms greater than three. In another variant, the ferrule could be in the form of a split ring having radial projections defining the stops. In yet another variant, the abutments could be contiguous rather than discrete, and more particularly a large continuous portion of the outer contour of the ferrule could serve as a stop. The outer contour would then have a shape similar to that of the inner coil, that is to say a radius increasing in the direction D of winding of the spiral going from the inside to the outside from the point of junction between the spiral and the ferrule. The outer contour could in this case be defined by a frame surrounding elastic arms, or could be the outline of a ferrule "full", without lights of elasticity.

Claims (15)

Ensemble spiral-virole pour un mouvement d'horlogerie, comprenant une virole (1) et un spiral (3) rattaché par son extrémité intérieure à la virole (1), la virole (1) étant apte à être montée sur un axe (2), caractérisé en ce que le contour externe de la virole (1) définit au moins une butée (10a, 10b, 10c) contre laquelle la spire intérieure du spiral (3) peut venir s'appuyer lors d'un choc avant que la limite élastique de la spire intérieure soit dépassée.Spiral-ferrule assembly for a watch movement, comprising a ferrule (1) and a spiral (3) attached at its inner end to the ferrule (1), the ferrule (1) being able to be mounted on an axis (2) ), characterized in that the outer contour of the collar (1) defines at least one stop (10a, 10b, 10c) against which the inner coil of the spiral (3) can come to rest during an impact before the elastic limit of the inner turn is exceeded. Ensemble spiral-virole selon la revendication 1, caractérisé en ce que la ou chaque butée (10a, 10b, 10c) est suffisamment éloignée du spiral (3) pour ne pas être touchée par le spiral (3) lors du fonctionnement normal de ce dernier.Spiral-ferrule assembly according to claim 1, characterized in that the or each abutment (10a, 10b, 10c) is sufficiently far from the spiral (3) not to be touched by the spiral (3) during normal operation of the latter . Ensemble spiral-virole selon la revendication 1 ou 2, caractérisé en ce que ladite au moins une butée consiste en plusieurs butées (10a, 10b, 10c) formées par des parties discrètes du contour externe de la virole (1).Spiral-ferrule assembly according to claim 1 or 2, characterized in that said at least one abutment consists of several abutments (10a, 10b, 10c) formed by discrete portions of the outer contour of the ferrule (1). Ensemble spiral-virole selon la revendication 3, caractérisé en ce que les butées (10a, 10b, 10c) sont au moins au nombre de trois.Spiral-ferrule assembly according to claim 3, characterized in that the abutments (10a, 10b, 10c) are at least three in number. Ensemble spiral-virole selon la revendication 3 ou 4, caractérisé en ce que les butées (10a, 10b, 10c) sont disposées selon une répartition angulaire sensiblement régulière.Spiral-ferrule assembly according to claim 3 or 4, characterized in that the stops (10a, 10b, 10c) are arranged in a substantially regular angular distribution. Ensemble spiral-virole selon l'une quelconque des revendications 3 à 5, caractérisé en ce que les butées (10a, 10b, 10c) sont sensiblement en arc de cercle de centre le centre (O) de l'axe (2).Spiral-ferrule assembly according to any one of claims 3 to 5, characterized in that the abutments (10a, 10b, 10c) are substantially arcuate center of the center (O) of the axis (2). Ensemble spiral-virole selon l'une quelconque des revendications 3 à 6, caractérisé en ce que la virole (1) comprend des bras élastiques (4) disposés en polygone entre lesquels peut être chassé l'axe (2) et au moins une desdites butées (10a, 10b, 10c) est située au niveau d'une zone (9a, 9b, 9c) de jonction entre deux desdits bras élastiques (4).Spiral-ferrule assembly according to any one of claims 3 to 6, characterized in that the shell (1) comprises resilient arms (4) arranged in a polygon between which can be driven axis (2) and at least one of said stops (10a, 10b, 10c) is located at a junction zone (9a, 9b, 9c) between two of said elastic arms (4). Ensemble spiral-virole selon l'une quelconque des revendications 3 à 7, caractérisé en ce que la virole (1) comprend des bras élastiques (4) disposés en polygone entre lesquels peut être chassé l'axe (2) et au moins une (10d, 10e, 10f) desdites butées est définie par un élément (11) faisant saillie depuis le côté extérieur de l'un des bras élastiques (4).Spiral-ferrule assembly according to any one of claims 3 to 7, characterized in that the shell (1) comprises resilient arms (4) arranged in a polygon between which can be driven axis (2) and at least one ( 10d, 10e, 10f) of said stops is defined by a member (11) projecting from the outer side of one of the elastic arms (4). Ensemble spiral-virole selon l'une quelconque des revendications 1 à 8, caractérisé en ce que ladite au moins une butée consiste en plusieurs butées (10a, 10b, 10c) situées à des distances respectives (Ra, Rb, Rc) du centre (O) de l'axe (2) qui sont croissantes dans le sens (D) du spiral (3) allant de l'intérieur vers l'extérieur depuis le point (8) de jonction du spiral (3) à la virole (1).Spiral-ferrule assembly according to any one of claims 1 to 8, characterized in that said at least one stop consists of several stops (10a, 10b, 10c) located at respective distances (Ra, Rb, Rc) from the center ( O) of the axis (2) which are increasing in the direction (D) of the spiral (3) running from the inside towards the outside from the point (8) of junction of the spiral (3) to the ferrule (1). ). Ensemble spiral-virole selon la revendication 9, caractérisé en ce que chacune desdites distances (Ra, Rb, Rc) est choisie pour que, dans une configuration où un point (3a, 3b, 3c) de la spire intérieure du spiral (3) est en appui contre la butée (10a, 10b, 10c) correspondante sous l'effet d'une force radiale (F) orientée vers le centre (O) de l'axe (2) et appliquée en ce point (3a, 3b, 3c), la déformation de la spire intérieure du spiral (3) en ce point (3a, 3b, 3c) soit un certain pourcentage de la déformation élastique maximale que peut subir la spire intérieure en ce point (3a, 3b, 3c), ce pourcentage étant sensiblement le même pour toutes lesdites distances (Ra, Rb, Rc).Spiral-ring assembly according to claim 9, characterized in that each of said distances (Ra, Rb, Rc) is chosen so that, in a configuration where a point (3a, 3b, 3c) of the inner coil of the spiral (3) is in abutment against the corresponding abutment (10a, 10b, 10c) under the effect of a radial force (F) oriented towards the center (O) of the axis (2) and applied at this point (3a, 3b, 3c), the deformation of the inner turn of the hairspring (3) at this point (3a, 3b, 3c) is a certain percentage of the maximum elastic deformation that can be experienced by the inner turn at this point (3a, 3b, 3c), this percentage being substantially the same for all said distances (Ra, Rb, Rc). Ensemble spiral-virole selon la revendication 9, caractérisé en ce que chacune desdites distances (Ra, Rb, Rc) est un pourcentage du rayon (ra, rb, rc) de la spire intérieure du spiral (3) au repos en un point (3a, 3b, 3c) de cette spire intérieure situé en regard de la butée (10a, 10b, 10c) correspondante, ce pourcentage étant sensiblement le même pour toutes lesdites distances (Ra, Rb, Rc).Spiral-ring assembly according to claim 9, characterized in that each of said distances (Ra, Rb, Rc) is a percentage of the radius (ra, rb, rc) of the inner coil of the spiral (3) resting at a point ( 3a, 3b, 3c) of this inner turn located opposite the corresponding stop (10a, 10b, 10c), this percentage being substantially the same for all said distances (Ra, Rb, Rc). Ensemble spiral-virole selon l'une quelconque des revendications 1 à 11, caractérisé en ce qu'il est réalisé d'un seul tenant.Spiral-ferrule assembly according to any one of claims 1 to 11, characterized in that it is made in one piece. Ensemble spiral-virole selon l'une quelconque des revendications 1 à 12, caractérisé en ce qu'il est réalisé en une matière qui ne peut se déformer plastiquement. Spiral-ferrule assembly according to any one of claims 1 to 12, characterized in that it is made of a material which can not plastically deform . Ensemble spiral-virole selon la revendication 13, caractérisé en ce qu'il est réalisé en une matière à base de silicium.Spiral-ferrule assembly according to claim 13, characterized in that it is made of a silicon-based material. Mouvement d'horlogerie comprenant un ensemble spiral-virole selon l'une quelconque des revendications 1 à 14.Clockwork movement comprising a spiral-ferrule assembly according to any one of claims 1 to 14.
EP06010169A 2006-05-17 2006-05-17 Hairspring-collet assembly for a timepiece movement Withdrawn EP1857891A1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP06010169A EP1857891A1 (en) 2006-05-17 2006-05-17 Hairspring-collet assembly for a timepiece movement
CN2007800031968A CN101375218B (en) 2006-05-17 2007-04-26 Hairspring-collet assembly for a timepiece movement
JP2009510564A JP5235869B2 (en) 2006-05-17 2007-04-26 Watch movement hairspring-beard ball assembly
EP07734401.8A EP2018601B1 (en) 2006-05-17 2007-04-26 Hairspring-collet assembly for a timepiece movement
US12/085,663 US7758237B2 (en) 2006-05-17 2007-04-26 Spiral/collet assembly for a horological movement
PCT/IB2007/001083 WO2007132306A2 (en) 2006-05-17 2007-04-26 Spiral/collet assembly for a horological movement

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EP06010169A EP1857891A1 (en) 2006-05-17 2006-05-17 Hairspring-collet assembly for a timepiece movement

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WO2007132306A2 (en) 2007-11-22
EP2018601B1 (en) 2018-12-05
JP5235869B2 (en) 2013-07-10
US7758237B2 (en) 2010-07-20
CN101375218B (en) 2011-06-29
WO2007132306A3 (en) 2008-04-17
JP2009537813A (en) 2009-10-29
US20090135679A1 (en) 2009-05-28
EP2018601A2 (en) 2009-01-28
CN101375218A (en) 2009-02-25

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