EP1584994A1 - Collet without deformation of the spiral fixing radius and fabrication method of such a collet - Google Patents

Collet without deformation of the spiral fixing radius and fabrication method of such a collet Download PDF

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Publication number
EP1584994A1
EP1584994A1 EP04008293A EP04008293A EP1584994A1 EP 1584994 A1 EP1584994 A1 EP 1584994A1 EP 04008293 A EP04008293 A EP 04008293A EP 04008293 A EP04008293 A EP 04008293A EP 1584994 A1 EP1584994 A1 EP 1584994A1
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EP
European Patent Office
Prior art keywords
ferrule
axis
points
spiral
collet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP04008293A
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German (de)
French (fr)
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EP1584994B1 (en
Inventor
Roger Lambert
Raymond Gabus
Pierre-André Buehler
Marco Verardo
Jean-Luc Bazin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nivarox Far SA
Nivarox SA
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Nivarox Far SA
Nivarox SA
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Publication date
Priority to EP04008293A priority Critical patent/EP1584994B1/en
Application filed by Nivarox Far SA, Nivarox SA filed Critical Nivarox Far SA
Priority to DE602004019183T priority patent/DE602004019183D1/en
Priority to AT04008293T priority patent/ATE421720T1/en
Priority to JP2005100967A priority patent/JP4630105B2/en
Priority to US11/094,080 priority patent/US7213966B2/en
Priority to TW094110542A priority patent/TW200602825A/en
Priority to CNB2005100633170A priority patent/CN100405237C/en
Priority to KR1020050028307A priority patent/KR20060045507A/en
Publication of EP1584994A1 publication Critical patent/EP1584994A1/en
Priority to HK05111387.3A priority patent/HK1079580A1/en
Application granted granted Critical
Publication of EP1584994B1 publication Critical patent/EP1584994B1/en
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    • G—PHYSICS
    • G04—HOROLOGY
    • G04D—APPARATUS OR TOOLS SPECIALLY DESIGNED FOR MAKING OR MAINTAINING CLOCKS OR WATCHES
    • G04D1/00—Gripping, holding, or supporting devices
    • G04D1/04—Tools for setting springs
    • 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
    • G—PHYSICS
    • G04—HOROLOGY
    • G04D—APPARATUS OR TOOLS SPECIALLY DESIGNED FOR MAKING OR MAINTAINING CLOCKS OR WATCHES
    • G04D1/00—Gripping, holding, or supporting devices
    • G—PHYSICS
    • G04—HOROLOGY
    • G04D—APPARATUS OR TOOLS SPECIALLY DESIGNED FOR MAKING OR MAINTAINING CLOCKS OR WATCHES
    • G04D1/00—Gripping, holding, or supporting devices
    • G04D1/02—Tweezers; Vice clamps or other special hand tools for watchmakers

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Springs (AREA)
  • Wire Processing (AREA)
  • Mechanical Coupling Of Light Guides (AREA)
  • Adornments (AREA)
  • Supporting Of Heads In Record-Carrier Devices (AREA)

Abstract

A collet for mounting balance spring, is formed by a metal band whose inner contour includes a discrete number of points of contact with a balance staff distributed along angular apertures alpha and in that width "I" of the band varies such that the compression forces of the contact points on the staff do not alter the distance R after driving in, leading to a friction torque allowing annular orientation of the collet on the staff. A collet for mounting a balance spring (9), is formed by a metal band (10) whose inner contour (11) delimits recesses (11a-c) for driving the collet onto a balance staff (2) and whose outer contour (12) includes a function point between the collet and the balance spring located at the end (14) of an arm (14) at a distance R from the center 0 of the staff greater than that of any other point of the outer contour. The inner contour includes a discrete number of points of contact (1, 3, 5) with the staff, one of the points being aligned with the staff and the function point, the angular apertures a of the function points not being all identical. The portions of band opposite the points of contact not aligned with the staff and the join point (4) form function of greater width I 6, I 8than the other parts of the band.

Description

DOMAINE TECHNIQUETECHNICAL AREA

La présente invention a pour objet une virole sans déformation du rayon de fixation du spiral permettant d'assujettir la courbe à l'intérieur d'un spiral, et pouvant également être incorporée dans un ensemble spiral virolé en une seule pièce. L'invention concerne également un procédé permettant d'obtenir une telle virole et son incorporation éventuelle dans un ensemble virolé en une seule pièce.The present invention relates to a shell without deformation of the radius of attachment of the hairspring for securing the curve inside a hairspring, and also be incorporated in a spiral assembly spiral in one piece. The invention also relates to a method for obtaining such a ferrule and its eventual incorporation into a whole in a single piece.

ARRIERE-PLAN TECHNOLOGIQUEBACKGROUND

Dans un mouvement mécanique horloger, la virole constitue une interface d'assemblage du spiral au balancier. A l'origine il s'agit d'une rondelle chassée sur l'axe de balancier et comportant au moins un point d'accrochage de la courbe à l'intérieur du spiral, par exemple en utilisant une goupille conique, par collage, ou encore par soudure. La soudure, et en particulier la soudure laser étant maintenant le mode de fixation préféré, la virole peut être réalisée en acier, et plus particulièrement en aciers spéciaux incorporant des proportions variables de Ni, Mo, Co ou Cr. La virole doit en premier lieu être de petite dimension pour n'avoir qu'une faible influence sur le moment d'inertie, et ne pas introduire de balourd, mais on attend d'une si petite pièce bien d'autres propriétés pour contribuer à la régularité de marche de l'organe réglant. Il est par exemple nécessaire, après chassage sur l'axe de balancier, de pouvoir la tourner sans difficulté pour effectuer la mise au repère, c'est à dire l'alignement de la cheville de plateau et de l'axe ancre-balancier au point mort. Il est également souhaitable que le chassage ait la plus faible influence possible sur le maintien d'une distance donnée entre l'axe de balancier et le point d'accrochage et que le contour extérieur de la virole soit tel qu'il ne perturbe pas la longueur active de la courbe au centre du spiral.In a clockwork mechanical movement, the ferrule constitutes an interface assembly of the balance spring. Originally it is a washer chased on the balance shaft and having at least one point of attachment of the curve to inside the hairspring, for example by using a taper pin, by gluing, or still by welding. Welding, and in particular laser welding, is now the preferred method of attachment, the ferrule may be made of steel, and more particularly special steels incorporating varying proportions of Ni, Mo, Co or Cr. The ferrule must first be of small size to have only a small influence on the moment of inertia, and not to introduce unbalance, but one expects from such a small room many other properties to contribute to the regularity of the organ setting. It is for example necessary, after driving on the balance shaft, to to be able to turn it without difficulty to make the benchmark, that is to say the alignment of the plate anchor and the anchor-balance shaft in neutral. It is also desirable that hunting has the least possible influence on the maintaining a given distance between the balance shaft and the attachment point and that the outer contour of the ferrule is such that it does not disturb the active length of the curve in the center of the spiral.

De nombreux brevets déposés dans les années soixante et septante apportent une solution à certains critères de qualité énumérés ci-dessus, mais aucune virole possède en même temps toutes les qualités requises, comme expliqué brièvement ci-après.Many patents filed in the sixties and seventies bring a solution to some of the quality criteria listed above, but no ferrule at the same time possesses all the required qualities, as explained briefly below.

Lorsque la virole est réalisée en acier spécial, le couple de friction sur l'axe de balancier après chassage peut être trop important et rendre difficile la mise au repère. Pour remédier à cet inconvénient la première solution consiste à pratiquer une fente d'élasticité entre le trou d'axe et le bord de la virole comme décrit par exemple dans le brevet CH 347 142 pour une virole à contour parfaitement circulaire sur laquelle le spiral est fixé au moyen d'une goupille conique située dans le plan de symétrie passant par l'axe et la fente. Le brevet CH 508 233 décrit une virole du même type, à spiral rivé ou collé dans une rainure, mais de forme asymétrique en raquette avec un décalage du trou d'axe, faisant qu'on élimine le risque d'appui de la première spire sur le pourtour de la virole. Ces viroles fendues à trou d'axe circulaire ont toutefois deux inconvénients. Lors du chassage sur l'axe de balancier le déplacement du point d'accrochage n'est pas contrôlable avec grande rigueur, et lorsqu'on effectue la mise au repère le risque est grand de provoquer des perturbations du plat et du centrage. Pour réduire le couple de friction facilitant la mise au repère sans devoir réaliser une fente, il est proposé dans le brevet US 3 429 120 de réaliser une virole en deux parties comportant un canon intérieur en laiton, ou autre matériau non ferreux, et une partie extérieure en acier pour permettre le soudage de la courbe à l'intérieur du spiral. Les résultats obtenus sont techniquement satisfaisants mais les coûts de fabrication et d'assemblage sont rédhibitoires.When the ferrule is made of special steel, the friction torque on the axis of balance after driving may be too important and make it difficult to benchmark. To remedy this drawback the first solution is to practice a slot elasticity between the axis hole and the edge of the shell as described for example in the patent CH 347 142 for a ferrule with perfectly circular contour on which the spiral is fixed by means of a conical pin located in the plane of symmetry passing through the axis and the slot. Patent CH 508 233 describes a ferrule of the same type, spiral riveted or glued in a groove, but of asymmetrical shape in racket with a offset of the axis hole, eliminating the risk of support of the first turn on around the ferrule. These split rings with a circular axis hole, however, have two disadvantages. When driving on the balance shaft the displacement of the point snagging is not controllable with great rigor, and when carrying out the at the benchmark the risk is great to cause disruption of the dish and centering. To reduce the friction torque making it easier to set the benchmark without having to perform a slot, it is proposed in US Patent 3,429,120 to make a ferrule in two parts having an inner barrel of brass, or other non-ferrous material, and a outer steel part to allow welding of the curve inside the spiral. The results obtained are technically satisfactory but the costs of manufacturing and assembly are crippling.

Pour réduire le couple de friction dans une virole en acier spécial sans fente d'élasticité, il semble a priori assez logique de réduire la surface de frottement à des contacts discrets entre l'axe de balancier et l'ouverture de chassage de la virole. Le procédé décrit dans le brevet CH 311 287 consiste à ovaliser un trou ayant initialement une forme circulaire, le contour de la virole conservant sa forme initiale circulaire. N'ayant de ce fait que deux points d'appui symétriques, on retrouve les mêmes problèmes que ceux évoqués pour la virole fendue.To reduce the friction torque in a steel ferrule without slot elasticity, it seems a priori logical enough to reduce the friction surface to discrete contacts between the axis of balance and the opening of hunting of the ferrule. The process described in patent CH 311 287 consists of ovalizing a hole having initially a circular shape, the outline of the shell retaining its original shape circular. Having only two symmetrical points of support, we find the same problems as those mentioned for the split ferrule.

Dans les brevets CH 466 807 et US 3 430 435, il est proposé de donner à l'ouverture de chassage de la virole un contour polygonal régulier illustré par un triangle équilatéral à angles cassés, voire une ouverture de forme hypocycloïdale. Dans ce mode de réalisation on observera que les points de serrage de la virole sur l'axe ont une équirépartition angulaire et que la virole présente presque nécessairement un contour régulier et inscrit dans un cercle, en particulier pour ne pas avoir de problèmes de balourd, mais en ayant en contrepartie l'inconvénient de présenter un risque de contact de la spire au centre.In the patents CH 466 807 and US 3,430,435, it is proposed to give ferrule opening opening a regular polygonal contour illustrated by a equilateral triangle with broken angles, or an opening of hypocycloidal shape. In this embodiment it will be observed that the clamping points of the ferrule on the axis have an angular distribution and that the ferrule presents almost necessarily a regular outline and inscribed in a circle, in particular for not have problems of unbalance, but with the disadvantage of present a risk of contact of the coil in the center.

RESUME DE L'INVENTIONSUMMARY OF THE INVENTION

L'invention a donc pour objet une virole dont la forme particulière permet de ne pas avoir de changement de rayon de fixation du spiral après chassage, garantissant un centrage parfait sans balourd. Cela permet d'avoir une force de chassage et un couple de maintien optimum, sans blocage trop important sur l'axe de balancier, de façon à faciliter l'opération ultérieure de mise au repère, voire de démontage. L'invention concerne également un ensemble spiral virolé et un procédé de fabrication de la virole et de l'ensemble spiral virolé.The subject of the invention is therefore a ferrule whose particular shape makes it possible not having a change of halyard fixing radius after driving, guaranteeing a perfect centering without unbalance. This allows to have a driving force and a optimum holding torque, without excessive locking on the balance shaft, in order to facilitate the subsequent operation of marking or even dismantling. The invention also relates to a spiral-wound assembly and a method of manufacture of the ferrule and the spiraled spiral assembly.

A cet effet l'invention concerne une virole formée par une bande métallique dont le contour intérieur délimite une ouverture pour le chassage de ladite virole sur un axe de balancier et dont le contour extérieur comporte un point de jonction entre la virole et le spiral situé à l'extrémité d'un bras à une distance R du centre O de l'axe supérieure à celle de tout autre point du contour extérieur. La virole est caractérisée en ce que le contact intérieur comporte un nombre discret de points de contact avec l'axe de balancier, repartis selon des ouvertures angulaires α identiques ou différentes et en ce que la largeur "l" de la bande varie de façon à ce que les forces de compression des points de contact sur l'axe ne modifie pas sensiblement la distance R et conduisent à un couple de friction permettant l'orientation angulaire de la virole sur l'axe.For this purpose the invention relates to a shell formed by a metal strip whose inner contour delimits an opening for driving said shell on a balance shaft and whose outer contour comprises a junction point between the ferrule and the spiral located at the end of an arm at a distance R from the center O of the axis greater than any other point on the outer contour. The ferrule is characterized in that the inner contact has a discrete number of contact points with the balance shaft, distributed according to identical or different angular apertures α and in that the width "1" of the band varies so that the forces of compression of the points of contact on the axis does not appreciably change the distance R and lead to a friction torque allowing the angular orientation of the ferrule on the axis.

Dans le mode de réalisation préféré, la virole présente une symétrie selon un axe x x' passant par le centre O de l'axe balancier et par le point de jonction entre la virole et le spiral, et le contour intérieur de la bande comporte trois points de contact, l'un d'eux étant diamétralement opposé au point de jonction entre la virole et le spiral, les deux autres points ayant, par rapport au premier point des ouvertures angulaires supérieures à 90°. Comme on le verra dans la description détaillée qui suit la bande métallique formant la virole peut avoir la forme d'un ruban d'inégale largeur, ou une forme plus massive en raquette dont l'ouverture pour le chassage sur l'axe a un contour ovalisé.In the preferred embodiment, the ferrule has a symmetry according to a axis x x 'passing through the center O of the pendulum axis and by the junction point between the ferrule and the spiral, and the inner contour of the strip has three points of contact, one of them being diametrically opposed to the point of junction between the ferrule and the spiral, the other two points having, relative to the first point, angular openings greater than 90 °. As will be seen in the detailed description that follows the tape metal forming the ferrule may be in the form of a ribbon of unequal width, or a more massive snowshoe shape whose opening for hunting on the axis has a oval contour.

Une virole selon l'invention peut être obtenue selon des procédés connus d'étampage, mais selon un procédé préféré, notamment pour une bande en forme de ruban, on fait appel à la technique Liga qui a l'avantage de permettre la formation simultanée en une seule pièce de la virole et du spiral, et par là même de procurer une maítrise encore plus grande de la valeur de R.A ferrule according to the invention can be obtained according to known methods stamping, but according to a preferred method, in particular for a strip in the form of ribbon, we use the Liga technique which has the advantage of allowing training simultaneously in one piece of the ferrule and the spiral, and thereby to provide an even greater mastery of the value of R.

BREVE DESCRIPTION DES DESSINSBRIEF DESCRIPTION OF THE DRAWINGS

D'autres caractéristiques et avantages de la présente invention apparaítront dans la description de différents exemples de réalisation, donnés à titre illustratif et non limitatif, en référence aux dessins annexés dans lesquels :

  • la figure 1 représente un premier mode de réalisation d'une virole selon l'invention;
  • la figure 2 est un graphique donnant le déplacement du point de soudure de la virole représentée à la figure 1 en fonction de l'angle α3, pour un serrage nominal donné.
  • la figure 3 représente un deuxième mode de réalisation;
  • la figure 4 est un graphique donnant le déplacement du point de soudure de la virole représentée à la figure 3 en fonction de l'angle α3, et
  • la figure 5 représente un troisième mode de réalisation.
Other characteristics and advantages of the present invention will become apparent in the description of various exemplary embodiments, given by way of nonlimiting illustration, with reference to the appended drawings in which:
  • FIG. 1 represents a first embodiment of a ferrule according to the invention;
  • Figure 2 is a graph showing the displacement of the weld point of the ferrule shown in Figure 1 as a function of the angle α 3 for a given nominal clamping.
  • Figure 3 shows a second embodiment;
  • FIG. 4 is a graph showing the displacement of the weld point of the ferrule represented in FIG. 3 as a function of the angle α 3 , and
  • Figure 5 shows a third embodiment.

DESCRIPTION DETAILLEE DE L'INVENTIONDETAILED DESCRIPTION OF THE INVENTION

A la figure 1 on a représenté en vue de dessus à grande échelle un premier mode de réalisation d'une virole selon l'invention en acier spécial, par exemple en acier ou en nickel et ayant une épaisseur uniforme de l'ordre de 0,2 mm. Cette virole est destinée à être chassée sur un axe 2 de balancier (représenté en pointillés) de centre 0. Comme on le voit, la virole est continuée par une bande 10 continue dont les contours, intérieur 11 et extérieur 12, ont une forme particulière dont la largeur "l" n'est pas uniforme en tous les points de la bande 10, et dont le contour intérieur 11 ne comporte que trois points de contact 1, 3, 5 avec l'axe 2 en s'éloignant de celui-ci pour former des évidements 11a, 11b, 11c.In Figure 1 there is shown in plan view on a large scale a first embodiment of a ferrule according to the invention made of special steel, for example in steel or nickel and having a uniform thickness of the order of 0.2 mm. This ferrule is intended to be driven on a balance shaft 2 (shown in dashed lines) of center 0. As can be seen, the ferrule is continued by a continuous strip 10 whose contours, interior 11 and exterior 12, have a particular shape whose width "l" is not uniform at all points of the strip 10, and whose inner contour 11 does not has three points of contact 1, 3, 5 with the axis 2 away from it for forming recesses 11a, 11b, 11c.

La bande présente un premier évidement 11a constituant un bras 14, dont l'extrémité comporte sur le contour extérieur 12 un point de jonction 4 à une distance R du centre 0 de l'axe 2 , et sur lequel sera soudée l'extrémité de la courbe à l'intérieur du spiral 9.The band has a first recess 11a constituting an arm 14, which the end comprises on the outer contour 12 a junction point 4 at a distance R of the center 0 of the axis 2, and on which will be welded the end of the curve to inside the spiral 9.

La distance R, qui est le rayon de fixation du spiral à la virole, correspond à une caractéristique essentielle de construction en ce que sa valeur ne devrait idéalement pas être modifiée par l'opération de chassage afin de conserver un spiral parfaitement centré. Selon les normes les plus exigeantes dans le domaine horloger le déplacement du point de jonction 4 ne doit pas être supérieur à 5 µm et, comme cela sera démontré par la suite, ce seuil peut très fortement être abaissé avec une virole selon l'invention.The distance R, which is the radius of attachment of the spiral to the shell, corresponds to an essential feature of construction in that its value should only ideally not be modified by the operation of hunting to keep a hairspring perfectly centered. According to the most demanding standards in the watchmaking field the displacement of the junction point 4 must not be greater than 5 μm and, as this will be demonstrated later, this threshold can very strongly be lowered with a ferrule according to the invention.

Le centre 0 de l'axe de balancier et le point de jonction 4 définissent un axe de symétrie x x' pour la virole, c'est-à-dire pour son contour extérieur 12 et intérieur 11 en appui sur l'axe 2 de balancier par les trois de contact 1, 3 et 5. Un premier point de contact 1 est diamétralement opposé au point de jonction 4 et les deux autres points de contact 3, 5 sont symétriques par rapport à l'axe x x' avec un décalage angulaire par rapport au premier point de contact 1 de α1 pour le point de contact 3 dans le sens horaire et de α5 pour le point de contact dans le sens anti-horaire les angles α1 et α5 ayant une même valeur supérieure à 90°. Cela définit donc entre les points de contact symétriques 3, 5 un décalage angulaire α3 dont la valeur est un des facteurs déterminants dans le but de l'invention, comme cela se comprendra par la suite. The center 0 of the balance shaft and the junction point 4 define an axis of symmetry xx 'for the ferrule, that is to say for its outer contour 12 and inner 11 bearing on the balance shaft 2 by the three contacts 1, 3 and 5. A first contact point 1 is diametrically opposite the junction point 4 and the other two contact points 3, 5 are symmetrical with respect to the axis xx 'with an angular offset by relative to the first contact point 1 of α 1 for the contact point 3 in the clockwise direction and of α 5 for the contact point in the counterclockwise direction the angles α 1 and α 5 having the same value greater than 90 ° . This therefore defines between the symmetrical contact points 3, 5 an angular offset α 3 whose value is one of the determining factors for the purpose of the invention, as will be understood later.

Si on considère maintenant le contour extérieur 12, on voit que la bande 10 comporte deux anses symétriques 16, 18 se rejoignant au niveau des trois points de contact 1, 3, 5. Les anses 16, 18 sont sensiblement diamétralement opposées aux points de contact symétriques 3, 5 et délimitent des évidements symétriques 11b, 11c. Les extrémités 6, 8 des anses 16, 18 sont situées, par rapport au centre 0 de l'axe 2, à une distance inférieure au rayon R de fixation du spiral, de sorte que la courbe à l'intérieur du spiral 9 ne puisse pas venir en contact avec le contour extérieur 12 de la virole lors des oscillations du balancier.If we now consider the outer contour 12, we see that the band 10 has two symmetrical loops 16, 18 joining at the three points of contact 1, 3, 5. The handles 16, 18 are substantially diametrically opposed to the symmetrical contact points 3, 5 and delimit symmetrical recesses 11b, 11c. The ends 6, 8 of the handles 16, 18 are located, relative to the center 0 of the axis 2, at a distance less than the radius R of attachment of the hairspring, so that the curve to the interior of the spiral 9 can not come into contact with the outer contour 12 of the ferrule during pendulum oscillations.

Compte-tenu des très petites dimensions de la virole, le rayon R étant de l'ordre de 0.5 mm, et des paramètres de construction très stricts, il n'apparaít pas à l'évidence sur la figure 1 que, selon une autre caractéristique essentielle de l'invention, la largeur "l" de la bande 10 n'est pas uniforme sur tout le pourtour. Dans l'exemple représenté les largeurs l1, l3, l5 au niveau des points de contact 1, 3, 5 sont identiques. Au niveau du point de jonction 4, la bande a une largeur l4 supérieure d'environ 15% et au niveau des anses 16, 18, les largeurs l6, l8 sont 30% à 35% supérieures à l1. Il est bien évident que les valeurs précédentes ne sont données qu'à titre d'exemples et qu'elles pourraient varier en fonction du matériau employé et de l'ampleur des anses 16, 18.Given the very small dimensions of the ferrule, the radius R being of the order of 0.5 mm, and very strict construction parameters, it does not appear to the obvious in Figure 1 that, according to another characteristic of the invention, the width "1" of the strip 10 is not uniform all around. In the example shown the widths l 1 , l 3 , l 5 at the contact points 1, 3, 5 are identical. At the junction 4, the strip has a width greater than the 4% and about 15 at the handles 16, 18, the width l 6, l 8 are 30% to 35% greater than l 1. It is obvious that the preceding values are given only as examples and that they could vary according to the material used and the size of the handles 16, 18.

Une autre caractéristique d'une virole selon l'invention concerne la valeur qu'il convient de donner à l'angle α3 entre le deuxième point de contact 3 et le troisième point de contact 5 pour avoir une variation dR minimum du rayon R. Le graphique reproduit à la figure 2 montre la variation de dR en fonction de la valeur de l'angle α3. D'après ce graphique on voit que la valeur optimale de α3 serait 105°. En réalité pour le contour représenté à la figure 3, α3 = 104° ce qui correspond à un déplacement dR du point de jonction 4 quasi nulle. En d'autres termes un tel résultat est obtenu grâce à la combinaison d'un choix particulier du contour de la bande 10, des largeurs "l" en ses différents points, et des angles α entre les différents points de contact avec l'axe 2, faisant que la résultante des forces de compression sur l'axe 2 est pratiquement nulle, tout en ayant une virole asymétrique éliminant les risques de contact de la courbe à l'intérieur du spiral sur la virole.Another characteristic of a ferrule according to the invention relates to the value that should be given to the angle α 3 between the second contact point 3 and the third contact point 5 to have a minimum dR variation of the radius R. The graph reproduced in FIG. 2 shows the variation of dR as a function of the value of the angle α 3 . From this graph we see that the optimal value of α 3 would be 105 °. In fact for the contour shown in FIG. 3, α 3 = 104 ° which corresponds to a displacement d R of the junction point 4 which is almost zero. In other words, such a result is obtained by combining a particular choice of the contour of the strip 10, widths "1" at its different points, and angles α between the various points of contact with the axis. 2, making the resultant compressive forces on the axis 2 is virtually zero, while having an asymmetrical ferrule eliminating the risk of contact of the curve inside the spiral on the ferrule.

En se référant maintenant à la figure 3, on a représenté un deuxième mode de réalisation correspondant à une conception un peu plus "massive", mais qui comporte toutes les caractéristiques du premier mode de réalisation. Le contour intérieur 11 de la virole comporte trois points de contact 1, 3, 5 avec l'axe 2 de balancier, ayant respectivement pour décalage angulaire α1, α3, α3, mais les évidements 11a, 11b et 11c du contour intérieur 11 entre lesdits points de contact sont réduit à des zone de "non-contact". Le contour extérieur 12 a une forme plus régulière évoquant la forme d'une raquette, le point de jonction 4 à l'extrémité du bras 14 étant de la même façon situé à une distance R du centre 0 de l'axe 2 supérieure à celle de tout autre points 6, 8, 13, 15 et 17 dudit contour extérieur 12. Dans cette construction, pour obtenir la plus faible variation possible dR du rayon R, on observera que les valeurs relatives des distances l1 à l8 sont différentes de celles du premier mode de réalisation. Il apparaít en effet que l4 > l1 > l8 = l6 = l5 = l4. Comme dans le premier mode de réalisation la valeur qu'il convient de donner à l'angle α3 entre les deux points de contact 3, 5 symétriques est déterminante pour que la résultante des forces de compression sur l'axe 2 soit nulle. Le graphique reproduit à la figure 4 montre la variation de dR en fonction de la valeur de l'angle α3. D'après ce graphique on voit que, pour la construction représentée à la figure 3 on obtient une valeur de dR quasi nulle pour un angle α3 = 112°. Ces valeurs sont données à titre d'exemple, car il est bien évident que des modifications des valeurs relatives de l1 à l8, pourraient conduire à un autre choix de α3, et même à avoir α1 = α3 = α5 en agissant uniquement sur la forme de la virole pour avoir une résultante des forces de compression sur l'axe 2 nulle, tout en ayant un bras 14 permettant d'éloigner la courbe à l'intérieur du spiral 9 des autres points du contour extérieur de la virole.Referring now to Figure 3, there is shown a second embodiment corresponding to a somewhat more "massive" design, but which has all the features of the first embodiment. The inner contour 11 of the ferrule comprises three contact points 1, 3, 5 with the axis 2 of the balance, respectively having for angular offset α 1 , α 3 , α 3 , but the recesses 11 a , 11 b and 11 c the inner contour 11 between said contact points are reduced to "non-contact" areas. The outer contour 12 has a more regular shape resembling the shape of a racket, the junction point 4 at the end of the arm 14 being in the same way located at a distance R from the center 0 of the axis 2 greater than that any other points 6, 8, 13, 15 and 17 of said outer contour 12. In this construction, to obtain the smallest possible variation dR of the radius R, it will be observed that the relative values of the distances l 1 to l 8 are different from those of the first embodiment. It appears that l 4 > l 1 > l 8 = l 6 = l 5 = l 4 . As in the first embodiment the value that should be given to the angle α 3 between the two points of contact 3, 5 symmetrical is critical for the resultant compression forces on the axis 2 is zero. The graph reproduced in FIG. 4 shows the variation of dR as a function of the value of the angle α 3 . From this graph we see that for the construction shown in Figure 3 we obtain a value of dR almost zero for an angle α 3 = 112 °. These values are given as an example, as it is obvious that changes in the relative values of l 1 to l 8 could lead to another choice of α 3 , and even to have α 1 = α 3 = α 5 by acting solely on the shape of the ferrule to have a resultant compression forces on the zero axis 2, while having an arm 14 to move the curve inside the spiral 9 of the other points of the outer contour of the ferrule.

Les deux modes de réalisation qui viennent d'être décrits comportent trois points de contact avec l'axe 2 de balancier. A la figure 5 on représente un autre mode de réalisation dans lequel il existe quatre points de contacts 1, 3, 5 et 7 avec l'axe 2 ayant des écarts angulaires α1, α3, α5 et α7 les uns par rapport aux autres et créant avec le contour intérieur 11 quatre zones de "non-contact" 11a, 11b, 11c et 11d. Les points de contact sont symétriques deux à deux, 1/3 et 5/7, c'est-à-dire avec des angles α1 et α5 égaux, et des angles α3 et α7 non nécessairement égaux.The two embodiments that have just been described comprise three points of contact with the balance shaft 2. FIG. 5 shows another embodiment in which there are four contact points 1, 3, 5 and 7 with axis 2 having angular deviations α 1 , α 3 , α 5 and α 7 relative to one another. to the others and creating with the inner contour 11 four areas of "non-contact" 11a, 11b, 11c and 11d. The points of contact are symmetrical two by two, 1/3 and 5/7, that is to say with angles α 1 and α 5 equal, and angles α 3 and α 7 not necessarily equal.

Les viroles selon l'invention qui viennent à être décrites peuvent être fabriquées selon des procédés connus par étampage. Toutefois le procédé préféré, notamment pour la virole correspondant au premier mode de réalisation et lorsque le spiral vient de matière avec la virole consiste à faire appel à la technique LIGA connue depuis le milieu des années 70.The ferrules according to the invention which have just been described can be manufactured by known methods by stamping. However, the preferred method especially for the ferrule corresponding to the first embodiment and when the spiral comes from material with the ferrule is to use the known LIGA technique since the mid-1970s.

Dans une première étape le procédé consiste fondamentalement à étaler sur un substrat préalablement revêtu d'une couche sacrificielle un photorésist positif ou négatif sur une épaisseur correspondant à la hauteur désirée pour la virole et à former au moyen d'un masque par photolithographie et attaque chimique une structure en creux correspondant au contour désiré pour la virole ou l'ensemble virole-spiral.In a first step the method basically consists of spreading on a substrate previously coated with a sacrificial layer a positive photoresist or negative to a thickness corresponding to the desired height for the shell and to form by means of a mask by photolithography and etching a structure in hollow corresponding to the desired contour for the ferrule or the ferrule-spiral assembly.

Dans une deuxième étape, on remplit ladite structure en creux d'un métal ou d'un alliage métallique soit par électrodéposition comme indiqué par exemple dans le brevet US 4 661 212, soit par compression et frittage de nanoparticules, comme indiqué par exemple dans la demande de brevet US 2001/0038803.In a second step, said hollow structure is filled with a metal or of a metal alloy either by electrodeposition as indicated for example in the US Patent 4,661,212, either by compression and sintering of nanoparticles, as indicated for example in the patent application US 2001/0038803.

Dans une dernière étape on libère la virole ou l'ensemble virole-spiral du substrat par élimination de la couche sacrificielle.In a last step, the ferrule or the ferrule-spiral assembly of the substrate by removing the sacrificial layer.

Ce procédé offre en outre l'avantage de pouvoir faire une fabrication en lot et donc d'abaisser le coût unitaire des produits obtenus.This method also offers the advantage of being able to make a batch production and to lower the unit cost of the products obtained.

Claims (10)

Virole pour le montage d'un spiral (9), ladite virole étant formée par une bande métallique (10) dont le contour intérieur (11) délimite des évidements (11a, 11b, 11c, 11d) pour le chassage sur un axe (2) de balancier et dont le contour extérieur (12) comporte un point de jonction (4) entre la virole et le spiral (9) situé à l'extrémité d'un bras (14) à une distance R du centre O de l'axe (2) supérieure à celle de tout autre point (6, 8, 13, 15, 17) du contour extérieur (12), caractérisée en ce que le contour intérieur (11) comporte un nombre discret de points de contact (1, 3, 5, 7) avec l'axe (2) répartis selon des ouvertures angulaires α identiques ou différentes et en ce que la largeur "l" de la bande (10) varie de façon à ce que les forces de compression des points de contact (1, 3, 5, 7) sur l'axe (2) ne modifient pas, sensiblement la distance R après chassage et conduisent à un couple de friction permettant l'orientation angulaire de la virole sur l'axe (2) et n'introduisent aucun balourd.Ferrule for mounting a spiral (9), said ferrule being formed by a metal strip (10) whose inner contour (11) delimits recesses (11a, 11b, 11c, 11d) for driving on an axis (2 ) of the balance and whose outer contour (12) has a junction point (4) between the ferrule and the spring (9) located at the end of an arm (14) at a distance R from the center O of the axis (2) greater than that of any other point (6, 8, 13, 15, 17) of the outer contour (12), characterized in that the inner contour (11) has a discrete number of contact points (1, 3, 5, 7) with the axis (2) distributed in the same or different angular apertures α and in that the width "1" of the strip (10) varies so that the compression forces of the points contact (1, 3, 5, 7) on the axis (2) do not substantially change the distance R after driving and lead to a friction torque allowing the angular orientation of the ferrule on the axis (2) and introduce no imbalance. Virole selon la revendication 1, caractérisée en ce qu'elle présente une symétrie selon un axe x x' passant par le centre O de l'axe (2) et par le point de jonction (4) entre la virole et le spiral (9).Ferrule according to claim 1, characterized in that it has a symmetry along an axis xx 'passing through the center O of the axis (2) and by the junction point (4) between the ferrule and the spiral (9) . Virole selon la revendication 2, caractérisée en ce qu'elle comporte trois points de contacts (1, 3, 5) d'ouvertures angulaires α1 α3 et α5, l'un des points de contact (1) étant diamétralement opposé au point de jonction (4), et les deux autres points de contact (3, 4) ayant des ouvertures angulaires α1 = α5 > 90°.Ferrule according to claim 2, characterized in that it comprises three contact points (1, 3, 5) of angular openings α 1 α 3 and α 5 , one of the contact points (1) being diametrically opposite to the junction point (4), and the two other contact points (3, 4) having angular apertures α 1 = α 5 > 90 °. Virole selon la revendication 3, caractérisée en ce que α3 > 100°.Ferrule according to claim 3, characterized in that α 3 > 100 °. Virole selon la revendication 3, caractérisé en ce que la bande (10) a une forme de ruban dont des portions sensiblement opposées aux points de contact (3, 5) non situés sur l'axe x x' forment des anses (16, 18) de largeur l6, l8 supérieure aux autres parties de la bande (10).Ferrule according to claim 3, characterized in that the strip (10) has a ribbon shape whose portions substantially opposite to the contact points (3, 5) not located on the axis xx 'form loops (16, 18) of width l 6 , l 8 greater than the other parts of the strip (10). Virole selon la revendication 3, caractérisée en ce que l'ouverture (11a) a un contour ovalisé et en ce que le contour extérieur (12) de la bande (10) a une forme rectangulaire à angles arrondis prolongée par le bras (14) comportant le point de jonction (4) entre la virole est le spiral (9).Ferrule according to claim 3, characterized in that the opening (11a) has an oval contour and that the outer contour (12) of the strip (10) has a rectangular shape with rounded corners extended by the arm (14). having the junction point (4) between the ferrule is the spiral (9). Virole selon la revendication 2, caractérisée en ce qu'elle comporte quatre points de contact (1, 3, 5, 7) d'ouvertures angulaires α1, α3, α5 et α7, lesdits points de contact étant deux à deux symétriques par rapport à l'axe x x' et α3 ≠ α7.Ferrule according to claim 2, characterized in that it comprises four contact points (1, 3, 5, 7) of angular openings α 1 , α 3 , α 5 and α 7 , said contact points being two by two symmetrical with respect to the axis xx 'and α 3 ≠ α 7 . Virole selon la revendication 1, caractérisée en ce que le spiral (9) vient de matière avec le bras (14) de la bande métallique (10). Ferrule according to claim 1, characterized in that the spiral (9) is made of material with the arm (14) of the metal strip (10). Virole selon la revendication 1 susceptible d'être fabriquée en lot par un procédé comportant les étapes consistant à : a - étaler sur un substrat, préalablement revêtu d'une couche sacrificielle, une couche de photorésist positif ou négatif ayant l'épaisseur désirée pour la virole; b - former au moyen d'un masque par photolithographie et attaque chimique une structure en creux correspondant aux contours intérieur et extérieur d'un lot de viroles; c - garnir la structure en creux d'un métal ou d'un alliage approprié par électrodéposition, et d - libérer le lot de viroles par élimination de la couche sacrificielle. The ferrule according to claim 1, which can be manufactured in a batch by a process comprising the steps of: a - spread on a substrate, previously coated with a sacrificial layer, a positive or negative photoresist layer having the desired thickness for the shell; b - forming by means of a mask by photolithography and etching a hollow structure corresponding to the inner and outer contours of a batch of ferrules; c - filling the hollow structure with a suitable metal or alloy by electroplating, and d - release the batch of ferrules by elimination of the sacrificial layer. Virole selon la revendication 9 caractérisée en ce que dans l'étape "b" on forme également le contour du spiral (9)Ferrule according to Claim 9, characterized in that in step "b" the contour of the spiral (9) is also formed
EP04008293A 2004-04-06 2004-04-06 Collet without deformation of the spiral fixing radius and fabrication method of such a collet Expired - Lifetime EP1584994B1 (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
DE602004019183T DE602004019183D1 (en) 2004-04-06 2004-04-06 Spiral roll without deformation of the fixing radius of the spiral spring and manufacturing process such spiral roll
AT04008293T ATE421720T1 (en) 2004-04-06 2004-04-06 SPIRAL ROLL WITHOUT DEFORMATION OF THE FIXATION RADIUS OF THE SPIRAL SPRING AND PRODUCTION METHOD OF SUCH SPIRAL ROLL
EP04008293A EP1584994B1 (en) 2004-04-06 2004-04-06 Collet without deformation of the spiral fixing radius and fabrication method of such a collet
US11/094,080 US7213966B2 (en) 2004-04-06 2005-03-31 Collet without deformation of the fixation radius of the balance-spring and manufacturing method of the same
JP2005100967A JP4630105B2 (en) 2004-04-06 2005-03-31 Collet (beard ball) whose mounting radius of the hairspring does not change and its manufacturing method
TW094110542A TW200602825A (en) 2004-04-06 2005-04-01 Collet without deformation of the fixation radius of the balance-spring and manufacturing method of the same
CNB2005100633170A CN100405237C (en) 2004-04-06 2005-04-06 Collet without deformation of the fixation radius of the balance-spring and manufacturing method of the same
KR1020050028307A KR20060045507A (en) 2004-04-06 2005-04-06 Collet without deformation of the fixation radius of the balance-spring and manufactoring method of the same
HK05111387.3A HK1079580A1 (en) 2004-04-06 2005-12-12 Collet without deformation of the fixation radius of the balance-spring and manufacturing method of the same

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EP04008293A EP1584994B1 (en) 2004-04-06 2004-04-06 Collet without deformation of the spiral fixing radius and fabrication method of such a collet

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EP (1) EP1584994B1 (en)
JP (1) JP4630105B2 (en)
KR (1) KR20060045507A (en)
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AT (1) ATE421720T1 (en)
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EP1637940A3 (en) * 2004-08-31 2010-08-04 Patek Philippe SA Genève Collet for timepieces
EP1826635A1 (en) * 2006-02-24 2007-08-29 Patek Philippe S.A. Resilient fastening device for horology
EP1868045A1 (en) * 2006-06-12 2007-12-19 Patek Philippe S.A. Horological collet
EP2485095A1 (en) 2008-03-20 2012-08-08 Nivarox-FAR S.A. Composite balance and method of manufacturing same
US8523426B2 (en) 2008-03-20 2013-09-03 Nivarox-Far S.A. One-piece regulating member and method of manufacturing the same
EP2104008A1 (en) 2008-03-20 2009-09-23 Nivarox-FAR S.A. Single-body regulating organ and method for manufacturing same
WO2009115463A1 (en) 2008-03-20 2009-09-24 Nivarox-Far S.A. Integral adjusting member and method for making same
US9459589B2 (en) 2008-03-20 2016-10-04 Nivarox-Far S.A. One-piece double balance spring and method of manufacturing the same
EP2104006A1 (en) 2008-03-20 2009-09-23 Nivarox-FAR S.A. Single-body double spiral and method for manufacturing same
US8550699B2 (en) 2008-03-20 2013-10-08 Nivarox-Far S.A. Composite balance and method of manufacturing the same
EP2104007A1 (en) 2008-03-20 2009-09-23 Nivarox-FAR S.A. Single-body spiral made from a silicon-based material and manufacturing method
EP2104005A1 (en) 2008-03-20 2009-09-23 Nivarox-FAR S.A. Composite balance and method of manufacturing thereof
US8296953B2 (en) 2008-03-28 2012-10-30 Montres Breguet S.A. Method of manufacturing a one-piece hairspring
US8622611B2 (en) 2008-03-28 2014-01-07 Montres Breguet S.A. One-piece hairspring and method of manufacturing the same
EP2105807A1 (en) 2008-03-28 2009-09-30 Nivarox-FAR S.A. Monobloc elevated curve spiral and method for manufacturing same
FR2957688A1 (en) * 2010-03-22 2011-09-23 Philippe Rhul Hairspring/collet assembly for horological movement of mechanical movement watch, has hairspring realized from fiber whose part is spiral, where fiber includes inner end connected to collet and outer end bordering on peripheral of case
EP3023844A1 (en) * 2014-11-20 2016-05-25 Nivarox-FAR S.A. Flexible ferrule
US9658599B2 (en) 2014-11-20 2017-05-23 Nivarox-Far S.A. Flexible collet
EP3913441A1 (en) 2020-05-22 2021-11-24 Patek Philippe SA Genève Oscillator for a timepiece
EP3955064A1 (en) * 2020-08-12 2022-02-16 Patek Philippe SA Genève Timepiece component comprising an opening designed for insertion of an axis

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ATE421720T1 (en) 2009-02-15
EP1584994B1 (en) 2009-01-21
KR20060045507A (en) 2006-05-17
TW200602825A (en) 2006-01-16
US20050219957A1 (en) 2005-10-06
DE602004019183D1 (en) 2009-03-12
JP2005300532A (en) 2005-10-27
JP4630105B2 (en) 2011-02-09
CN1680892A (en) 2005-10-12
CN100405237C (en) 2008-07-23
HK1079580A1 (en) 2006-04-07
US7213966B2 (en) 2007-05-08

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