EP2395402A1 - High frequency balance wheel for timepiece - Google Patents

High frequency balance wheel for timepiece Download PDF

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Publication number
EP2395402A1
EP2395402A1 EP10165704A EP10165704A EP2395402A1 EP 2395402 A1 EP2395402 A1 EP 2395402A1 EP 10165704 A EP10165704 A EP 10165704A EP 10165704 A EP10165704 A EP 10165704A EP 2395402 A1 EP2395402 A1 EP 2395402A1
Authority
EP
European Patent Office
Prior art keywords
balance
serge
feeder
plane
housing
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
EP10165704A
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German (de)
French (fr)
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EP2395402B1 (en
Inventor
Nicolas Georges Hayek
Marco Verardo
Jean-Philippe Rochat
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.)
Montres Breguet SA
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Montres Breguet SA
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Publication date
Application filed by Montres Breguet SA filed Critical Montres Breguet SA
Priority to EP13184692.5A priority Critical patent/EP2677369B1/en
Priority to EP20100165704 priority patent/EP2395402B1/en
Publication of EP2395402A1 publication Critical patent/EP2395402A1/en
Application granted granted Critical
Publication of EP2395402B1 publication Critical patent/EP2395402B1/en
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    • GPHYSICS
    • G04HOROLOGY
    • G04BMECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B17/00Mechanisms for stabilising frequency
    • G04B17/04Oscillators acting by spring tension
    • G04B17/06Oscillators with hairsprings, e.g. balance
    • G04B17/063Balance construction
    • GPHYSICS
    • G04HOROLOGY
    • G04BMECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B18/00Mechanisms for setting frequency
    • G04B18/006Mechanisms for setting frequency by adjusting the devices fixed on the balance

Definitions

  • the invention relates to a balance wheel for a timepiece, with inertia adjustment for adjusting its oscillation frequency, comprising a hub arranged to cooperate with a balance shaft perpendicular to a balance plane, and a continuous or discontinuous peripheral serge. , connected to said hub by at least one junction surface, said rocker further comprising at least one flyweight, said at least one flyweight being attached to said serge in a housing that comprises the periphery of said serge for its reception.
  • the invention also comprises a balance spring incorporating such a balance.
  • the invention also relates to a timepiece incorporating such a sprung balance or such a balance.
  • the invention relates to the field of regulating organs for timepieces, and particularly the balance or the balance spring.
  • the accuracy of the calibres depends on the quality of their regulating organ, and the obtaining of very high oscillation frequencies, for example of 10 Hz, to be compared to the usual frequencies of 2.5 to 4 Hz, can only be obtained with the design of suitable regulating members, particularly with regard to the pendulum.
  • the energy to be provided, in the form of elastic torque of the spiral, for the maintenance of the oscillation is proportional to the product, on the one hand of the inertia of the balance around its axis of rotation, by the square frequency on the other hand.
  • the passage of a frequency from 4 Hz to 10 Hz results in about the division by 6 of the inertia.
  • a pendulum inertia of 12 mg.cm 2 is considered good, such a pendulum conventionally having a diameter of 9 to 10 mm.
  • a balance for use at 10 Hz must have a low value inertia, especially less than 2 mg.cm 2 .
  • a rocker for use at 10 Hz must still, for optimal operation, be of minimum mass, especially less than 30 mg, so as to reduce friction in the bearings, so as to avoid disturbances of isochronism in the different positions of use.
  • the inventive step consisted in creating the conditions of a balance structure, including the hub, the serge, and the connections between these two components as light as possible, moving away as much as possible from the hub of the masses of density if possible of this structure.
  • said at least one flyweight comprises a first portion comprising said guide means, and a second portion constituted by a regulating screw, of which a thread, or respectively a tapping, cooperates with a thread, respectively a thread. , which includes the said first part, and said thread, or said tapping respectively, does not cooperate with said serge or with said junction surface.
  • said serge is made integrally with said junction surface and said hub in a micro-machinable material or in silicon or in liga or quartz.
  • each of said portions of said at least one feeder is made of a material, which is a heavy metal or beryllium bronze or gold or platinum or tantalum or molybdenum, or one of their alloys.
  • the invention also comprises a balance spring incorporating at least one such balance.
  • the invention also relates to a timepiece incorporating at least one such sprung balance or at least one such balance.
  • the preferred use of silicon makes it possible to obtain a beam structure that is both very light and very rigid, which can be dimpled in the junction zone between the hub and the serge.
  • the transfer to the periphery of flyweights equipped with screws is favorable to obtaining a properly sized inertia despite the very low total mass of the balance.
  • the adjustment and balancing functions are ensured and facilitated.
  • the choice of a particular pair of materials, namely CuBe for a first feeder portion said stud inserted in a housing of the serge, and gold alloy for the adjusting screw screwed into this stud ensures, despite the very small dimensioning of this screw, a tightening torque ensuring its maintenance, without risk of breakage.
  • Such a pendulum is perfectly suitable for good operation at the frequency of 10 Hz, and even more so, since its dimensioning in diameter, in the following example of a preferred embodiment, is greater than or equal to the usual diameter of a pendulum . It is therefore possible to reduce its diameter, and thus further reduce its mass and inertia, for frequencies greater than 10 Hz.
  • the invention relates to the field of regulating organs for timepieces, and particularly the balance or the balance spring.
  • the invention is particularly directed to the production of pendulums for high oscillation frequencies, 10 Hz or more.
  • the invention relates to a pendulum 1 for a timepiece, with inertia adjustment for adjusting its oscillation frequency, comprising a hub 2 arranged to cooperate with a balance shaft 3 perpendicular to a balance plane 4, and a serge peripheral 5 continuous or discontinuous.
  • This serge 5 can indeed be discontinuous in the context of a search for relief.
  • the exemplary embodiments of the figures show a continuous serge, which offers the advantage of good rigidity and good aerodynamics, and which limits the localized flexions by preventing any warping of the balance.
  • This serge 5 is connected to the hub 2 by at least one junction surface 6, which may be constituted by a continuous surface such as a perforated disc or not, or by one or more arms 22.
  • the preparation of a junction surface 6 perforated in particular with cutouts, crossing or not, between longitudinal members ensuring a good triangulation, makes it possible to further reduce the weight of the balance.
  • the figure 14 shows an exemplary embodiment with an arm 22 comprising such a perforated structure, in a mixed manner, with, separated by ribs 30, pockets 29 passing through the entire thickness of the joining surface 6, in particular of the arm 22, or and blind pockets 31, not through, on only a part of the thickness of the junction surface 6, in particular of the arm 22, for example a third, each separate another similar blind pocket located on the other side of the arm 22 by a canvas of comparable thickness.
  • the good triangulation carried out allows a sensible economy of mass, a conventional finite element calculation makes it possible to determine the longitudinal members 30 which are essential for the mechanical strength and the resistance to twisting.
  • the annular portion of the serge 5 can also be perforated similarly. It is the same if it is preferred a continuous junction surface 6 such as a disk or the like.
  • This balance 1 also comprises at least one flyweight 7.
  • a flyweight 7 is attached to or in the serge 5 in a housing 8 that includes the periphery of the serge 5 for its reception.
  • Such a weight 7 and comprises a first portion 10 comprising the guide means 9 and said pad, and a second portion 11 preferably constituted by a set screw 12, a thread, or respectively a thread, cooperates with a tapping, respectively a thread, which comprises the first part 10, and whose thread, or respectively the tapping, is remote from the serge 5 or the junction surface 6.
  • the guide means 9 and the complementary guide means 9A are linear.
  • the guide means 9 and the complementary guide means 9A are circular.
  • the holding means 13 are constituted by resilient holding means, these are constituted by clipping means 14 that comprises this feeder 7, and which are arranged to cooperate elastically with complementary clipping means 14A that includes serge 5.
  • the assembly by clipping is irreversible.
  • the elastic holding means are constituted by at least one elastic lip 15 that comprises the flyweight 7 or the housing 8.
  • This lip elastic member 15 is arranged to bend in a compression position during a first insertion stroke of the weight 7 into the housing 8 and to allow this introduction, and to relax in an expansion position in a recess 16 which respectively comprises the housing 8 or the flyweight 7, in a service position or in a second regulating race of this flyweight 7, this second regulating race following the first insertion race.
  • This elastic lip 15 has a stop surface 17 arranged to abut, when the lip 15 is in this detent position, with a complementary stop surface 17A arranged in return that comprises the housing 8 or the weight 7.
  • screwing or unscrewing the adjusting screw 12 brings closer or moves away, or conversely, one end of this adjusting screw 12 of the serge 5, the first portion 10 or pad of the feeder 7 being immobile in translation.
  • the stud has the main function of the support of the adjusting screw 12, and can therefore be reduced to its simplest expression screw insert.
  • the screwing or unscrewing of the adjusting screw 12 brings closer or moves away, or vice versa, an end of this feeder 7 carrying this screw 12, in particular the stud 10 carrying the screw 12, the serge 5, this adjusting screw 12 being motionless in translation.
  • the adjusting screw 12 has a shoulder 18, respectively a groove, arranged to cooperate in a complementary manner with a groove 19, respectively a shoulder, that includes the serge 5.
  • the rocker 1 comprises blind clearance means 20 on the hub 2 side.
  • These release means 20 are arranged to allow the insertion of this flyweight 7 towards the hub 2, then placing in position the adjusting screw 12, or adjusting screws 12 if there are several, by cooperation between the shoulder 18 and the groove 19.
  • This adjusting screw 12 is then further away from the hub 2 than the flyweight 7 with which it is a captive assembly when they are connected by a thread, respectively tapping one, cooperating with a thread, respectively a thread of the other.
  • the stud 10 has an H-shaped profile arranged to cooperate with a straight notch 21 that includes the serge 5.
  • this notch 21 is radial with respect to the hub 2.
  • the stud 10 comprises a cylindrical profile arranged to cooperate with a cylindrical bore of the housing 8 of said serge 5.
  • the stud 10 has a profile with a right outer toothing, which is arranged to cooperate with a right internal toothing that includes the housing 8 of the serge 5.
  • the adjusting screw 12 is radial with respect to the hub 2.
  • the weight 7 comprises at least two adjusting screws of inertia 12.
  • the rocker 1 comprises at least two weights 7A, 7B, each attached to the serge 5 in a housing 8A, 8B, which comprises the periphery of the serge 5 for its reception.
  • These weights 7A, 7B each comprise guide means complementary to complementary guide means that includes the housing 8A, 8B, and each comprise at least two portions 10, 11 adjustable in translation one by relative to the other in a plane parallel to the plane 4 of the balance 1, and each of these parts 10, 11 of each of these weights 7A, 7B is made of a material which is denser than a first material constituting the serge 5.
  • flyweights 7A, 7B are symmetrical in pairs with respect to a plane passing through the hub 2 and the balance shaft 3.
  • weights 7A, 7B are symmetrical two by two with respect to said hub 2.
  • the weights 7 are four in number, arranged along two perpendicular axes passing through the hub 2 and in the plane 4 of the balance.
  • the 4 associated adjusting screws 12 allow all the angular possibilities of unbalance creation. The case where several adjusting screws are embedded on the same pad gives even more adjustment latitude.
  • the first feeder portion 10 said pad is dimensionally stable.
  • each flyweight 7, and in particular each movable portion 11 feeder or adjusting screw 12 is set back from a circle circumscribed in the serge 5, in any relative position of the parts that constitute this flyweight.
  • the serge 5 may comprise one or more cutouts 23, peripheral as on the figure 4 or on the inner part of the serge 5 in another embodiment not shown in the figures.
  • the joining surface consists of at least one arm 22. Thanks to the use of a silicon technology, such an arm can adopt any profile, in particular a curve, or other . It may also include lightenings, through or not, for example in the form of triangular pockets, which ensure the rigidity while allowing a significant weight loss.
  • the figures represent even-numbered versions of arms diametrically opposed two by two.
  • the periphery of the serge 5 comprises an alternation of surfaces which are all rigid: T-shaped joining surfaces 24 between arms 22 and serge 5 on the one hand, and surfaces of reinforced support 25 comprising the housing 8 to receive the weights 7 on the other hand.
  • a counterweight 7 is implanted in the alignment of certain arms 22, or even in the alignment of each arm 22, as in the second variant of FIG. figure 2 , or the third variant of the figure 4 and the reinforced joining zone of the arms 22 to the serge 5 may comprise a notch 21, which is functional or which constitutes a relief.
  • Balance balancing is an important operation, for which we seek a high balancing accuracy, of the order of one microgram x cm.
  • weights that includes the balance 1 are weights 7 in two parts 10 and 11 as described above.
  • the serge 5 is made integrally with the junction surface 6 and the hub 2 in silicon preferably, or a micro-machinable material, or in quartz, or according to the LIGA method .
  • each of the portions 10, 11, of each weight 7 is made of a material, which is a heavy metal, or beryllium bronze, or gold or platinum or tantalum or molybdenum, or a their oxides or their nitrides, or one of their alloys, or one of the complexes developed on their bases.
  • the second portion 11 is a control screw 12
  • this pair of materials consists of beryllium bronze of CuBe type on the one hand, and a gold alloy, at least 14 karat, on the other hand.
  • the stud 10 is beryllium bronze CuBe type and the adjusting screw 12 is made of gold alloy.
  • the mass and reduced inertia of the balance according to the invention allow the manufacture of a lower diameter of the pivot of 30 to 40% relative to the usual pivots, which has a very large influence on the level of friction.
  • the three variants presented are conjugated to a pivot with a diameter of approximately 0.05 mm.
  • the unbalance of the weights 7 is decomposed between an unbalance part which is fixed, and a part of the unbalance which is movable and serves as an adjustment.
  • the studs 10 constitute the regulating part of the unbalance, and the screws 12 are fixed in translation and constitute the fixed part of the unbalance.
  • the studs 10 constitute the fixed part of the unbalance, and the screws 12 constitute the regulating part.
  • the regulating part is always of the same value.
  • the inertia of the regulating portion is close to 0.25 mg.cm 2 .
  • the quality factor measured is close to 500 for the three variants. This quality factor is obtained by the combination of a silicon balance spring and a balance according to the invention.
  • this high quality factor and, on the other hand, the adjustment and adjustment possibilities offered by the studs 10 and the adjusting screws 12, which, in addition to their own adjustment functions, fulfill a new function. , which is to serve as a machining platform for adding or removing material in the balancing and tuning adjustment operations, allows the elimination of the racking.
  • the adjustment and adjustment of the balance are very precise, and allow the balance to be used in a high frequency oscillator, 10 Hz or more.
  • the design of the balance allows a very precise adjustment of the oscillation frequency of the sprung balance in which it is integrated.
  • the invention also comprises a sprung balance incorporating at least one such balance 1 according to the invention.
  • the invention also relates to a timepiece incorporating at least one such sprung balance or at least one such rocker 1.

Abstract

The balance (1) has an inertia counterweight (7) arranged on a peripheral felloe in a housing (8), and comprising a circular profile guiding unit (9) complementary to a circular complementary guiding unit (9A). The counterweight comprises two adjustable parts i.e. studs (10, 11), adjustable in translation with respect to each other in a plane parallel to a balance plane (4). One of the adjustable parts is immovable in translation with respect to the felloe, where each adjustable part of the counterweight is made of material that is highly denser than the material constituting the felloe.

Description

L'invention concerne un balancier pour pièce d'horlogerie, à réglage d'inertie pour ajuster sa fréquence d'oscillation, comportant un moyeu agencé pour coopérer avec un axe de balancier perpendiculaire à un plan de balancier, et une serge périphérique continue ou discontinue, reliée audit moyeu par au moins une surface de jonction, ledit balancier comportant encore au moins une masselotte d'inertie, ladite au moins une masselotte étant rapportée sur ladite serge dans un logement que comporte la périphérie de ladite serge pour sa réception.The invention relates to a balance wheel for a timepiece, with inertia adjustment for adjusting its oscillation frequency, comprising a hub arranged to cooperate with a balance shaft perpendicular to a balance plane, and a continuous or discontinuous peripheral serge. , connected to said hub by at least one junction surface, said rocker further comprising at least one flyweight, said at least one flyweight being attached to said serge in a housing that comprises the periphery of said serge for its reception.

L'invention comporte encore un balancier-spiral incorporant un tel balancier.The invention also comprises a balance spring incorporating such a balance.

L'invention concerne encore une pièce d'horlogerie incorporant un tel balancier-spiral ou un tel balancier.The invention also relates to a timepiece incorporating such a sprung balance or such a balance.

L'invention concerne le domaine des organes réglants pour pièces d'horlogerie, et tout particulièrement le balancier ou le balancier-spiral.The invention relates to the field of regulating organs for timepieces, and particularly the balance or the balance spring.

La précision des calibres dépend de la qualité de leur organe réglant, et l'obtention de fréquences d'oscillation très élevées, par exemple de 10 Hz, à comparer aux fréquences usuelles de 2,5 à 4 Hz, ne peut être obtenue qu'avec la conception d'organes réglants adaptés, en particulier en ce qui concerne le balancier.The accuracy of the calibres depends on the quality of their regulating organ, and the obtaining of very high oscillation frequencies, for example of 10 Hz, to be compared to the usual frequencies of 2.5 to 4 Hz, can only be obtained with the design of suitable regulating members, particularly with regard to the pendulum.

En effet, l'énergie à fournir, sous forme de couple élastique du spiral, pour l'entretien de l'oscillation est proportionnelle au produit, d'une part de l'inertie du balancier autour de son axe de pivotement, par le carré de la fréquence d'autre part. Ainsi, par exemple, à énergie égale, le passage d'une fréquence de 4 Hz à 10 Hz entraîne environ la division par 6 de l'inertie. Pour une fréquence de 4 Hz, une inertie du balancier de 12 mg.cm2 est considérée comme bonne, un tel balancier ayant classiquement un diamètre de 9 à 10 mm. Ainsi, un balancier pour une utilisation à 10 Hz doit avoir une inertie de faible valeur, notamment inférieure à 2 mg.cm2.Indeed, the energy to be provided, in the form of elastic torque of the spiral, for the maintenance of the oscillation is proportional to the product, on the one hand of the inertia of the balance around its axis of rotation, by the square frequency on the other hand. Thus, for example, at equal energy, the passage of a frequency from 4 Hz to 10 Hz results in about the division by 6 of the inertia. For a frequency of 4 Hz, a pendulum inertia of 12 mg.cm 2 is considered good, such a pendulum conventionally having a diameter of 9 to 10 mm. Thus, a balance for use at 10 Hz must have a low value inertia, especially less than 2 mg.cm 2 .

Un balancier pour une utilisation à 10 Hz doit encore, pour un fonctionnement optimal, être de masse minimale, notamment inférieure à 30 mg, de façon à réduire les frottements dans les paliers, de façon à éviter les perturbations de l'isochronisme dans les différentes positions d'utilisation.A rocker for use at 10 Hz must still, for optimal operation, be of minimum mass, especially less than 30 mg, so as to reduce friction in the bearings, so as to avoid disturbances of isochronism in the different positions of use.

Tout en étant de masse et d'inertie faible, le balancier d'un oscillateur à haute fréquence doit, encore, permettre le réglage du balourd et un parfait équilibrage, statique comme dynamique, et sa construction doit autoriser des opérations de réglage ou/et d'ajustement. Il n'est donc pas possible d'utiliser les technologies classiques, ni même des solutions de balanciers allégés tels que des balanciers avec serge à rayons telle que décrite par le brevet FR 1275 357 au nom de Straumann, ou par le brevet FR 1 301 938 au nom de LIP. En effet, leur masse, même réduite, interdit d'obtenir une inertie aussi basse que souhaitée. De même, un balancier en titane selon le brevet EP 1 562 087 au nom de MONTRES BREGUET SA, conçu avec une serge et des bras en titane et des sections réduites, reste d'une masse et d'une inertie qui sont supérieures à ce qui est souhaité pour un fonctionnement optimal.While being of mass and low inertia, the balance of a high frequency oscillator must, still, allow the adjustment of unbalance and a perfect balancing, static as dynamic, and its construction must authorize operations of adjustment and / or adjustment. It is therefore not possible to use conventional technologies, or even lightened balance solutions such as spokes with spoke serge as described by the patent FR 1275357 in the name of Straumann, or by the patent FR 1 301 938 on behalf of LIP. Indeed, their mass, even reduced, prohibits to obtain as low inertia as desired. Similarly, a titanium beam according to the patent EP 1 562 087 in the name of WATCHES BREGUET SA, designed with a serge and titanium arms and reduced sections, remains of mass and inertia that are greater than what is desired for optimal operation.

Il est également recherché un facteur de qualité de l'ordre de 500, donc nettement supérieur à ceux des oscillateurs traditionnels où il est voisin de 220 à 280 pour des montres de bonne qualité. Un tel facteur de qualité ne peut s'obtenir que par la conjugaison d'un spiral silicium et d'un balancier remplissant les conditions ci-dessus. L'obtention d'un facteur de qualité élevé, conjuguée à des possibilités de réglage et d'ajustement, doivent, encore, permettre l'élimination de la raquetterie.It is also sought a quality factor of the order of 500, so significantly higher than those of traditional oscillators where it is close to 220 to 280 for good quality watches. Such a quality factor can only be obtained by the combination of a silicon balance spring and a balance fulfilling the above conditions. Obtaining a high quality factor, combined with adjustment and adjustment possibilities, must, again, allow the elimination of the raquetterie.

Naturellement, la masse de l'ensemble étant limitée, le nombre de composants le plus réduit possible est à privilégier.Naturally, the mass of the assembly being limited, the number of components as small as possible is to be preferred.

La démarche inventive a consisté à créer les conditions d'une structure de balancier, incluant le moyeu, la serge, et les liaisons entre ces deux composants la plus légère possible, en éloignant au maximum du moyeu des masses de densité si possible supérieure à celle de cette structure.The inventive step consisted in creating the conditions of a balance structure, including the hub, the serge, and the connections between these two components as light as possible, moving away as much as possible from the hub of the masses of density if possible of this structure.

A cet effet l'invention concerne un balancier pour pièce d'horlogerie, à réglage d'inertie pour ajuster sa fréquence d'oscillation, comportant un moyeu agencé pour coopérer avec un axe de balancier perpendiculaire à un plan de balancier, et une serge périphérique continue ou discontinue, reliée audit moyeu par au moins une surface de jonction, ledit balancier comportant encore au moins une masselotte d'inertie, ladite au moins une masselotte étant rapportée sur ladite serge dans un logement que comporte la périphérie de ladite serge pour sa réception, caractérisé en ce que :

  • ladite au moins une masselotte comporte des moyens de guidage de profil complémentaire à des moyens de guidage complémentaires que comporte ledit logement;
  • chaque dite au moins une masselotte comporte au moins deux parties réglables en translation l'une par rapport à l'autre dans un plan parallèle audit plan dudit balancier, et dont l'une desdites parties est immobile en translation par rapport à ladite serge,
  • chacune desdites parties de ladite au moins une masselotte est réalisée en un matériau qui est plus dense qu'un premier matériau constitutif de ladite serge.
For this purpose the invention relates to a balance for a timepiece, with inertia adjustment for adjusting its oscillation frequency, comprising a hub arranged to cooperate with a balance shaft perpendicular to a balance plane, and a peripheral serge. continuous or discontinuous, connected to said hub by at least one junction surface, said balance further comprising at least one flyweight, said at least one flyweight being attached to said serge in a housing that comprises the periphery of said serge for its reception characterized in that
  • said at least one flyweight comprises profile guide means complementary to complementary guide means that includes said housing;
  • each said at least one flyweight comprises at least two parts adjustable in translation relative to each other in a plane parallel to said plane of said balance, and one of said parts is immobile in translation relative to said serge,
  • each of said portions of said at least one feeder is made of a material which is denser than a first material constituting said serge.

Selon une caractéristique de l'invention, ladite au moins une masselotte comporte une première partie comportant lesdits moyens de guidage, et une deuxième partie constituée par une vis réglante, dont un filetage, ou respectivement un taraudage, coopère avec un taraudage, respectivement un filetage, que comporte ladite première partie, et dont ledit filetage, ou respectivement ledit taraudage, ne coopère pas avec ladite serge ni avec ladite surface de jonction.According to one characteristic of the invention, said at least one flyweight comprises a first portion comprising said guide means, and a second portion constituted by a regulating screw, of which a thread, or respectively a tapping, cooperates with a thread, respectively a thread. , which includes the said first part, and said thread, or said tapping respectively, does not cooperate with said serge or with said junction surface.

Selon une autre caractéristique de l'invention, ladite serge est réalisée de façon monobloc avec ladite surface de jonction et ledit moyeu dans un matériau micro-usinable ou en silicium ou en liga ou en quartz.According to another characteristic of the invention, said serge is made integrally with said junction surface and said hub in a micro-machinable material or in silicon or in liga or quartz.

Selon une autre caractéristique de l'invention, chacune desdites parties de ladite au moins une masselotte est réalisée en un matériau, qui est un métal lourd ou du bronze au béryllium ou de l'or ou du platine ou du tantale ou du molybdène, ou un de leurs alliages.According to another characteristic of the invention, each of said portions of said at least one feeder is made of a material, which is a heavy metal or beryllium bronze or gold or platinum or tantalum or molybdenum, or one of their alloys.

L'invention comporte encore un balancier-spiral incorporant au moins un tel balancier.The invention also comprises a balance spring incorporating at least one such balance.

L'invention concerne encore une pièce d'horlogerie incorporant au moins un tel balancier-spiral ou au moins un tel balancier.The invention also relates to a timepiece incorporating at least one such sprung balance or at least one such balance.

L'emploi préféré du silicium permet d'obtenir une structure de balancier à la fois très légère et très rigide, qui peut être alvéolée dans la zone de jonction entre le moyeu et la serge. Le report en périphérie de masselottes équipées de vis est favorable à l'obtention d'une inertie correctement dimensionnée malgré la très faible masse totale du balancier. Les fonctionnalités de réglage et d'équilibrage sont assurées et facilitées. Le choix d'un couple de matériaux particulier, à savoir CuBe pour une première partie de masselotte dite plot insérée dans un logement de la serge, et alliage d'or pour la vis réglante vissée dans ce plot permet d'assurer, malgré le très petit dimensionnement de cette vis, un couple de serrage assurant son maintien, sans risque de casse.The preferred use of silicon makes it possible to obtain a beam structure that is both very light and very rigid, which can be dimpled in the junction zone between the hub and the serge. The transfer to the periphery of flyweights equipped with screws is favorable to obtaining a properly sized inertia despite the very low total mass of the balance. The adjustment and balancing functions are ensured and facilitated. The choice of a particular pair of materials, namely CuBe for a first feeder portion said stud inserted in a housing of the serge, and gold alloy for the adjusting screw screwed into this stud ensures, despite the very small dimensioning of this screw, a tightening torque ensuring its maintenance, without risk of breakage.

Un tel balancier est parfaitement approprié pour un bon fonctionnement à la fréquence de 10 Hz, et même davantage, puisque son dimensionnement en diamètre, dans l'exemple qui suit d'une réalisation préférée, est supérieur ou égal au diamètre usuel d'un balancier. Il est donc envisageable de réduire son diamètre, et donc de réduire encore sa masse et son inertie, pour des fréquences supérieures à 10 Hz.Such a pendulum is perfectly suitable for good operation at the frequency of 10 Hz, and even more so, since its dimensioning in diameter, in the following example of a preferred embodiment, is greater than or equal to the usual diameter of a pendulum . It is therefore possible to reduce its diameter, and thus further reduce its mass and inertia, for frequencies greater than 10 Hz.

D'autres avantages de l'invention apparaîtront à la lecture de la description qui va suivre, en référence aux figures annexées où :

  • la figure 1 représente, de façon schématisée et en perspective, une première variante d'un balancier selon l'invention ;
  • la figure 2 représente, de façon analogue à la figure 1, une deuxième variante de l'invention,
  • la figure 3 représente, de façon schématisée et en perspective, un détail de la figure 2 mettant en évidence une masselotte d'inertie ;
  • la figure 4 représente, de façon analogue à la figure 1, une troisième variante de l'invention,
  • la figure 5 représente, de façon analogue à la figure 3, un détail de la figure 4;
  • la figure 6 représente, de façon schématisée et en vue de face, la deuxième variante objet de la figure 2 ;
  • la figure 7 représente, de façon schématisée, une section selon le plan AA de la figure 6 ;
  • la figure 8 représente, de façon schématisée, une section selon le plan BB de la figure 6 ;
  • la figure 9 représente, de façon schématisée et en vue de face, la troisième variante objet de la figure 4 ;
  • la figure 10 représente, de façon schématisée, une section selon le plan AA de la figure 9 ;
  • la figure 11 représente, de façon schématisée, une section selon le plan BB de la figure 9 ;
  • la figure 12 représente, de façon schématisée et en section dans un plan médian, un détail d'une réalisation particulière de l'invention ;
  • la figure 13 représente, de façon analogue à la figure 12, un détail d'une autre réalisation particulière de l'invention ;
  • la figure 14 représente, de façon schématisée, partielle et en vue de face, un détail d'un balancier selon l'invention comportant une zone de jonction ajourée entre le moyeu et la serge.
Other advantages of the invention will appear on reading the description which follows, with reference to the appended figures in which:
  • the figure 1 represents, schematically and in perspective, a first variant of a balance according to the invention;
  • the figure 2 represents, in a similar way to figure 1 a second variant of the invention,
  • the figure 3 represents, schematically and in perspective, a detail of the figure 2 highlighting a flyweight of inertia;
  • the figure 4 represents, in a similar way to figure 1 a third variant of the invention,
  • the figure 5 represents, in a similar way to figure 3 , a detail of the figure 4 ;
  • the figure 6 represents, schematically and in front view, the second variant object of the figure 2 ;
  • the figure 7 schematically represents a section according to the plane AA of the figure 6 ;
  • the figure 8 represents, schematically, a section along the plane BB of the figure 6 ;
  • the figure 9 represents, schematically and in front view, the third variant object of the figure 4 ;
  • the figure 10 schematically represents a section according to the plane AA of the figure 9 ;
  • the figure 11 represents, schematically, a section along the plane BB of the figure 9 ;
  • the figure 12 represents, schematically and in section in a median plane, a detail of a particular embodiment of the invention;
  • the figure 13 represents, in a similar way to figure 12 a detail of another particular embodiment of the invention;
  • the figure 14 represents, schematically, partially and in front view, a detail of a rocker according to the invention comprising a junction area perforated between the hub and the serge.

L'invention concerne le domaine des organes réglants pour pièces d'horlogerie, et tout particulièrement le balancier ou le balancier-spiral.The invention relates to the field of regulating organs for timepieces, and particularly the balance or the balance spring.

L'invention est tout particulièrement orientée vers la production de balanciers pour de hautes fréquences d'oscillation, 10 Hz ou davantage.The invention is particularly directed to the production of pendulums for high oscillation frequencies, 10 Hz or more.

Trois variantes de réalisation, nullement limitatives, sont représentées sur les figures.Three non-limiting embodiments are shown in the figures.

L'invention concerne un balancier 1 pour pièce d'horlogerie, à réglage d'inertie pour ajuster sa fréquence d'oscillation, comportant un moyeu 2 agencé pour coopérer avec un axe de balancier 3 perpendiculaire à un plan de balancier 4, et une serge périphérique 5 continue ou discontinue. Cette serge 5 peut en effet être discontinue dans le cadre d'une recherche d'allégement. Les exemples de réalisation des figures montrent une serge continue, qui offre l'avantage d'une bonne rigidité et d'un bon aérodynamisme, et qui limite les flexions localisées en prévenant tout gauchissement du balancier.The invention relates to a pendulum 1 for a timepiece, with inertia adjustment for adjusting its oscillation frequency, comprising a hub 2 arranged to cooperate with a balance shaft 3 perpendicular to a balance plane 4, and a serge peripheral 5 continuous or discontinuous. This serge 5 can indeed be discontinuous in the context of a search for relief. The exemplary embodiments of the figures show a continuous serge, which offers the advantage of good rigidity and good aerodynamics, and which limits the localized flexions by preventing any warping of the balance.

Cette serge 5 est reliée au moyeu 2 par au moins une surface de jonction 6, qui peut être constituée par une surface continue tel un disque ajouré ou non, ou par un ou plusieurs bras 22. La confection d'une surface de jonction 6 ajourée, notamment avec des découpes, traversantes ou non, entre des longerons assurant une bonne triangulation, permet de réduire encore la masse du balancier.This serge 5 is connected to the hub 2 by at least one junction surface 6, which may be constituted by a continuous surface such as a perforated disc or not, or by one or more arms 22. The preparation of a junction surface 6 perforated , in particular with cutouts, crossing or not, between longitudinal members ensuring a good triangulation, makes it possible to further reduce the weight of the balance.

La figure 14 montre un exemple de réalisation avec un bras 22 comportant une telle structure ajourée, de façon mixte, avec, séparées par des nervures 30, des poches 29 traversantes sur toute l'épaisseur de la surface de jonction 6, notamment du bras 22, ou/et des poches 31 borgnes, non traversantes, sur une partie seulement de l'épaisseur de la surface de jonction 6, notamment du bras 22, par exemple un tiers, chacune séparée d'une autre poche borgne similaire située sur l'autre face du bras 22 par une toile d'épaisseur comparable. La bonne triangulation effectuée permet une économie de masse sensible, un calcul classique par éléments finis permet de déterminer les longerons 30 qui sont essentiels à la tenue mécanique et à la résistance au vrillage. Bien évidemment, la partie annulaire de la serge 5 peut également être ajourée de façon similaire. Il en est de même s'il est préféré une surface de jonction 6 continue telle qu'un disque ou similaire.The figure 14 shows an exemplary embodiment with an arm 22 comprising such a perforated structure, in a mixed manner, with, separated by ribs 30, pockets 29 passing through the entire thickness of the joining surface 6, in particular of the arm 22, or and blind pockets 31, not through, on only a part of the thickness of the junction surface 6, in particular of the arm 22, for example a third, each separate another similar blind pocket located on the other side of the arm 22 by a canvas of comparable thickness. The good triangulation carried out allows a sensible economy of mass, a conventional finite element calculation makes it possible to determine the longitudinal members 30 which are essential for the mechanical strength and the resistance to twisting. Of course, the annular portion of the serge 5 can also be perforated similarly. It is the same if it is preferred a continuous junction surface 6 such as a disk or the like.

Ce balancier 1 comporte encore au moins une masselotte d'inertie 7. Une telle masselotte 7 est rapportée sur, ou dans, la serge 5 dans un logement 8 que comporte la périphérie de la serge 5 pour sa réception.This balance 1 also comprises at least one flyweight 7. Such a flyweight 7 is attached to or in the serge 5 in a housing 8 that includes the periphery of the serge 5 for its reception.

Selon l'invention :

  • cette masselotte 7 comporte des moyens de guidage 9, de profil complémentaire à des moyens de guidage complémentaires 9A que comporte le logement 8 avec lequel coopère cette masselotte 7;
  • chaque telle masselotte 7 comporte au moins deux parties 10, 11, qui sont réglables en translation l'une par rapport à l'autre dans un plan parallèle au plan 4 dudit balancier 1, et dont l'une de ces parties 10 ; 11, est immobile en translation par rapport à la serge 5 ;
  • chacune de ces parties 10, 11 d'une telle masselotte 7 est réalisée en un matériau qui est plus dense qu'un premier matériau constitutif de la serge 5.
According to the invention:
  • this weight 7 comprises guiding means 9 of complementary profile to complementary guiding means 9A that includes the housing 8 with which cooperates this feeder 7;
  • each such weight 7 comprises at least two parts 10, 11, which are adjustable in translation relative to each other in a plane parallel to the plane 4 of said beam 1, and one of these parts 10; 11, is immobile in translation relative to the serge 5;
  • each of these portions 10, 11 of such a weight 7 is made of a material which is denser than a first material constituting the serge 5.

Une telle masselotte 7 comporte ainsi une première partie 10 comportant les moyens de guidage 9 et dite plot, et une deuxième partie 11 constituée de préférence par une vis réglante 12, dont un filetage, ou respectivement un taraudage, coopère avec un taraudage, respectivement un filetage, que comporte la première partie 10, et dont le filetage, ou respectivement le taraudage, est à distance de la serge 5 ou de la surface de jonction 6.Such a weight 7 and comprises a first portion 10 comprising the guide means 9 and said pad, and a second portion 11 preferably constituted by a set screw 12, a thread, or respectively a thread, cooperates with a tapping, respectively a thread, which comprises the first part 10, and whose thread, or respectively the tapping, is remote from the serge 5 or the junction surface 6.

Dans un premier mode d'exécution, tel que visible notamment sur la première variante de la figure 1 et sur la deuxième variante de la figure 2, les moyens de guidage 9 et les moyens de guidage complémentaires 9A sont linéaires.In a first embodiment, as can be seen in particular in the first variant of the figure 1 and on the second variant of the figure 2 the guide means 9 and the complementary guide means 9A are linear.

Dans un deuxième mode d'exécution, tel que visible notamment sur la troisième variante de la figure 4, les moyens de guidage 9 et les moyens de guidage complémentaires 9A sont circulaires.In a second embodiment, as can be seen in particular in the third variant of the figure 4 the guide means 9 and the complementary guide means 9A are circular.

De façon préférée, cette masselotte 7 est maintenue dans son logement 8 par des moyens de maintien 13. Ces derniers peuvent être de différentes natures, notamment :

  • moyens de maintien géométriques agencés pour interdire l'extraction de cette masselotte 7 de son logement 8, tel que visible sur la deuxième variante de réalisation de la figure 2 ;
  • moyens de maintien à demeure réalisés par chassage ou collage ou brasage ou soudage ; en cas de collage un jeu d'environ 10 microns est à prévoir pour ajuster au mieux la quantité de colle et permettre une prise correcte ;
  • moyens de maintien élastique agencés pour autoriser l'introduction de cette masselotte 7 dans son logement 8 et pour interdire son extraction, tel que visible sur les figures 12 ou 13.
Preferably, this weight 7 is maintained in its housing 8 by holding means 13. The latter can be of different types, including:
  • geometric holding means arranged to prohibit the extraction of this feeder 7 from its housing 8, as visible in the second embodiment of the invention. figure 2 ;
  • permanent holding means made by driving or gluing or brazing or welding; in the case of bonding a set of about 10 microns is to be provided to adjust the amount of glue and allow a correct grip;
  • elastic holding means arranged to allow the introduction of this weight 7 in its housing 8 and to prohibit its extraction, as visible on the Figures 12 or 13 .

De préférence, quand les moyens de maintien 13 sont constitués par des moyens de maintien élastique, ceux-ci sont constitués par des moyens de clipage 14 que comporte cette masselotte 7, et qui sont agencés pour coopérer de façon élastique avec des moyens de clipage complémentaire 14A que comporte la serge 5.Preferably, when the holding means 13 are constituted by resilient holding means, these are constituted by clipping means 14 that comprises this feeder 7, and which are arranged to cooperate elastically with complementary clipping means 14A that includes serge 5.

Préférentiellement, l'assemblage par clipage est irréversible.Preferably, the assembly by clipping is irreversible.

Dans les modes de réalisation représentés aux figures 12 et 13, les moyens de maintien élastique sont constitués par au moins une lèvre élastique 15 que comporte cette masselotte 7 ou le logement 8. Cette lèvre élastique 15 est agencée pour fléchir dans une position de compression pendant une première course d'introduction de la masselotte 7 dans le logement 8 et autoriser cette introduction, et pour se détendre dans une position de détente dans un embrèvement 16 que comporte respectivement le logement 8 ou la masselotte 7, dans une position de service ou bien dans une deuxième course réglante de cette masselotte 7, cette deuxième course réglante faisant suite à la première course d'introduction. Cette lèvre élastique 15 comporte une surface d'arrêt 17 agencée pour venir en butée, quand la lèvre 15 est dans cette position de détente, avec une surface d'arrêt complémentaire 17A disposée en retour que comporte le logement 8 ou la masselotte 7.In the embodiments shown in Figures 12 and 13 , the elastic holding means are constituted by at least one elastic lip 15 that comprises the flyweight 7 or the housing 8. This lip elastic member 15 is arranged to bend in a compression position during a first insertion stroke of the weight 7 into the housing 8 and to allow this introduction, and to relax in an expansion position in a recess 16 which respectively comprises the housing 8 or the flyweight 7, in a service position or in a second regulating race of this flyweight 7, this second regulating race following the first insertion race. This elastic lip 15 has a stop surface 17 arranged to abut, when the lip 15 is in this detent position, with a complementary stop surface 17A arranged in return that comprises the housing 8 or the weight 7.

Dans certains modes de réalisation, comme la première variante de la figure 1, ou la troisième variante de la figure 4, le vissage ou le dévissage de la vis réglante 12 rapproche ou éloigne, ou inversement, une extrémité de cette vis réglante 12 de la serge 5, la première partie 10 ou plot de la masselotte 7 étant immobile en translation. Dans cette version, le plot a pour fonction principale le support de la vis réglante 12, et peut donc être réduit à sa plus simple expression d'insert porte-vis.In some embodiments, such as the first variant of the figure 1 , or the third variant of the figure 4 , screwing or unscrewing the adjusting screw 12 brings closer or moves away, or conversely, one end of this adjusting screw 12 of the serge 5, the first portion 10 or pad of the feeder 7 being immobile in translation. In this version, the stud has the main function of the support of the adjusting screw 12, and can therefore be reduced to its simplest expression screw insert.

Dans d'autres modes de réalisation, comme la deuxième variante de la figure 2, le vissage ou le dévissage de la vis réglante 12 rapproche ou éloigne, ou inversement, une extrémité de cette masselotte 7 porteuse de cette vis 12, en particulier le plot 10 porteur de la vis 12, de la serge 5, cette vis réglante 12 étant immobile en translation. Dans cet exemple de réalisation, tel que visible sur les figures 3, 7 et 8, la vis réglante 12 comporte un épaulement 18, respectivement une gorge, agencée pour coopérer de façon complémentaire avec une gorge 19, respectivement un épaulement, que comporte la serge 5.In other embodiments, such as the second variant of the figure 2 , the screwing or unscrewing of the adjusting screw 12 brings closer or moves away, or vice versa, an end of this feeder 7 carrying this screw 12, in particular the stud 10 carrying the screw 12, the serge 5, this adjusting screw 12 being motionless in translation. In this embodiment, as visible on the figures 3 , 7 and 8 , the adjusting screw 12 has a shoulder 18, respectively a groove, arranged to cooperate in a complementary manner with a groove 19, respectively a shoulder, that includes the serge 5.

De préférence, quand ce plot 10 est mobile, comme la deuxième variante de la figure 2, le balancier 1 comporte des moyens de dégagement borgnes 20 du côté du moyeu 2. Ces moyens de dégagement 20 sont agencés pour permettre l'insertion de cette masselotte 7 vers le moyeu 2, puis la mise en position de la vis réglante 12, ou des vis réglantes 12 s'il y en a plusieurs, par coopération entre l'épaulement 18 et la gorge 19. Cette vis réglante 12 est alors plus éloignée du moyeu 2 que la masselotte 7 avec laquelle elle constitue un ensemble imperdable quand elles sont liées par un filetage, respectivement taraudage de l'une, coopérant avec un taraudage, respectivement un filetage de l'autre.Preferably, when this stud 10 is mobile, as the second variant of the figure 2 , the rocker 1 comprises blind clearance means 20 on the hub 2 side. These release means 20 are arranged to allow the insertion of this flyweight 7 towards the hub 2, then placing in position the adjusting screw 12, or adjusting screws 12 if there are several, by cooperation between the shoulder 18 and the groove 19. This adjusting screw 12 is then further away from the hub 2 than the flyweight 7 with which it is a captive assembly when they are connected by a thread, respectively tapping one, cooperating with a thread, respectively a thread of the other.

Dans cette même deuxième variante de la figure 2, le plot 10 comporte un profil en H agencé pour coopérer avec une encoche droite 21 que comporte la serge 5.In this same second variant of the figure 2 , the stud 10 has an H-shaped profile arranged to cooperate with a straight notch 21 that includes the serge 5.

Dans une version particulière de l'invention, telle que représentée sur les figures 2 et 6, et nullement limitative, cette encoche 21 est radiale par rapport au moyeu 2.In a particular version of the invention, as shown in the figures 2 and 6 , and in no way limiting, this notch 21 is radial with respect to the hub 2.

Dans le deuxième mode d'exécution, tel que visible notamment sur la troisième variante de la figure 4, le plot 10 comporte un profil cylindrique agencé pour coopérer avec un alésage cylindrique du logement 8 de ladite serge 5. Dans une variante non représentée sur les figures, le plot 10 comporte un profil avec une denture extérieure droite, qui est agencé pour coopérer avec une denture intérieure droite que comporte le logement 8 de la serge 5.In the second embodiment, as can be seen in particular on the third variant of the figure 4 , the stud 10 comprises a cylindrical profile arranged to cooperate with a cylindrical bore of the housing 8 of said serge 5. In a variant not shown in the figures, the stud 10 has a profile with a right outer toothing, which is arranged to cooperate with a right internal toothing that includes the housing 8 of the serge 5.

De façon préférée, tel que visible sur les figures, la vis réglante 12 est radiale par rapport au moyeu 2.Preferably, as shown in the figures, the adjusting screw 12 is radial with respect to the hub 2.

Dans une variante non représentée sur les figures, la masselotte 7 comporte au moins deux vis réglantes d'inertie 12.In a variant not shown in the figures, the weight 7 comprises at least two adjusting screws of inertia 12.

De préférence, et tel qu'illustré par les figures, le balancier 1 comporte au moins deux masselottes 7A, 7B, chacune rapportée sur la serge 5 dans un logement 8A, 8B, que comporte la périphérie de la serge 5 pour sa réception. Ces masselottes 7A, 7B comportent chacune des moyens de guidage de profil complémentaire à des moyens de guidage complémentaires que comporte le logement 8A, 8B, et comportent chacune au moins deux parties 10, 11 réglables en translation l'une par rapport à l'autre dans un plan parallèle au plan 4 du balancier 1, et chacune de ces parties 10, 11 de chacune de ces masselottes 7A, 7B, est réalisée en un matériau qui est plus dense qu'un premier matériau constitutif de la serge 5.Preferably, and as illustrated by the figures, the rocker 1 comprises at least two weights 7A, 7B, each attached to the serge 5 in a housing 8A, 8B, which comprises the periphery of the serge 5 for its reception. These weights 7A, 7B each comprise guide means complementary to complementary guide means that includes the housing 8A, 8B, and each comprise at least two portions 10, 11 adjustable in translation one by relative to the other in a plane parallel to the plane 4 of the balance 1, and each of these parts 10, 11 of each of these weights 7A, 7B is made of a material which is denser than a first material constituting the serge 5.

De préférence ces masselottes 7A, 7B, sont symétriques deux à deux par rapport à un plan passant par le moyeu 2 et l'axe de balancier 3.Preferably these flyweights 7A, 7B are symmetrical in pairs with respect to a plane passing through the hub 2 and the balance shaft 3.

De préférence ces masselottes 7A, 7B, sont symétriques deux à deux par rapport audit moyeu 2.Preferably these weights 7A, 7B are symmetrical two by two with respect to said hub 2.

Dans une exécution préférée, tel que visible sur les figures, les masselottes 7 sont au nombre de quatre, disposées selon deux axes perpendiculaires passant par le moyeu 2 et dans le plan 4 du balancier. Les 4 vis réglantes 12 associées permettent toutes les possibilités angulaires de création de balourd. Le cas où plusieurs vis réglantes sont embarquées sur un même plot donne encore plus de latitude de réglage.In a preferred embodiment, as shown in the figures, the weights 7 are four in number, arranged along two perpendicular axes passing through the hub 2 and in the plane 4 of the balance. The 4 associated adjusting screws 12 allow all the angular possibilities of unbalance creation. The case where several adjusting screws are embedded on the same pad gives even more adjustment latitude.

Dans une exécution particulière, correspondant notamment mais non limitativement à la deuxième variante de la figure 2, la première partie de masselotte 10 dite plot est indéformable.In a particular embodiment, corresponding in particular but not limited to the second variant of the figure 2 , the first feeder portion 10 said pad is dimensionally stable.

Afin de limiter la traînée aérodynamique, chaque masselotte 7, et en particulier chaque partie mobile 11 de masselotte ou vis réglante 12, est en retrait d'un cercle circonscrit à la serge 5, dans toute position relative des parties qui constituent cette masselotte.In order to limit the aerodynamic drag, each flyweight 7, and in particular each movable portion 11 feeder or adjusting screw 12, is set back from a circle circumscribed in the serge 5, in any relative position of the parts that constitute this flyweight.

A de fins d'allégement supplémentaire, la serge 5 peut comporter une ou plusieurs découpes 23, périphériques comme sur la figure 4, ou bien sur la partie intérieure de la serge 5 dans une autre exécution non représentée sur les figures.For purposes of additional relief, the serge 5 may comprise one or more cutouts 23, peripheral as on the figure 4 or on the inner part of the serge 5 in another embodiment not shown in the figures.

Dans une exécution préférée, tel que visible sur les figures, la surface de jonction est constituée d'au moins un bras 22. Grâce à l'emploi d'une technologie silicium, un tel bras peut adopter tout profil, notamment courbe, ou autre. Il peut aussi comporter des allègements, traversants ou non, par exemple sous forme de poches triangulaires, qui assurent la rigidité tout en autorisant une perte de poids conséquente. Les figures représentent des versions à nombre pair de bras diamétralement opposés deux à deux.In a preferred embodiment, as can be seen in the figures, the joining surface consists of at least one arm 22. Thanks to the use of a silicon technology, such an arm can adopt any profile, in particular a curve, or other . It may also include lightenings, through or not, for example in the form of triangular pockets, which ensure the rigidity while allowing a significant weight loss. The figures represent even-numbered versions of arms diametrically opposed two by two.

Dans la première variante de la figure 1, ces bras 22 sont alternés avec les masselottes 7, la périphérie de la serge 5 comporte une alternance de surfaces qui sont toutes rigides : surfaces de jonction 24 en forme de Té entre bras 22 et serge 5 d'une part, et surfaces d'appui renforcées 25 comportant les logements 8 pour recevoir les masselottes 7 d'autre part.In the first variant of the figure 1 these arms 22 are alternated with the weights 7, the periphery of the serge 5 comprises an alternation of surfaces which are all rigid: T-shaped joining surfaces 24 between arms 22 and serge 5 on the one hand, and surfaces of reinforced support 25 comprising the housing 8 to receive the weights 7 on the other hand.

Dans un autre type d'exécution, une masselotte 7 est implantée dans l'alignement de certains bras 22, ou même dans l'alignement de chaque bras 22, comme dans la deuxième variante de la figure 2, ou la troisième variante de la figure 4, et la zone de jonction renforcée des bras 22 à la serge 5 peut comporter une encoche 21, qui est fonctionnelle ou bien qui constitue un allègement.In another type of embodiment, a counterweight 7 is implanted in the alignment of certain arms 22, or even in the alignment of each arm 22, as in the second variant of FIG. figure 2 , or the third variant of the figure 4 and the reinforced joining zone of the arms 22 to the serge 5 may comprise a notch 21, which is functional or which constitutes a relief.

Il faut pouvoir commodément ajuster le balourd d'une part, et corriger l'inertie d'autre part, et surtout ajuster très précisément la fréquence de l'oscillateur.It must be able to conveniently adjust the unbalance on the one hand, and correct the inertia on the other hand, and especially adjust very precisely the frequency of the oscillator.

L'équilibrage d'un balancier est une opération importante, pour laquelle on recherche une précision élevée d'équilibrage, de l'ordre du microgramme x cm.Balance balancing is an important operation, for which we seek a high balancing accuracy, of the order of one microgram x cm.

Avantageusement, chaque masselotte 7 est profilée d'une façon particulière, de façon à permettre, séparément ou à la fois :

  • un équilibrage facilité par l'existence d'au moins une surface plane, qui est constituée, soit par une surface plane dite parallèle 26, qui est parallèle au plan de balancier 4, soit par une surface plane de bout 27 qui est perpendiculaire au plan de balancier 4 et à une radiale issue de l'axe de balancier 3. Une même masselotte 7 peut comporter à la fois une ou plusieurs surfaces parallèles 26, et une ou plusieurs surfaces de bout 27, notamment, tel que visible sur les figures, une surface de bout sur la première partie 10 ou le plot, et une surface de bout 27 sur la deuxième partie 11 ou la vis réglante 12. Il est alors aisé de réaliser l'équilibrage par fraisage ou gravure ou autre sur l'une de ces surfaces 26 ou/et 27, ou encore par apport de matière, notamment par brasage, soudage ou plasma si le plot 10 ou/et la vis réglante 12 est métallique ;
  • une traînée aérodynamique réduite, la masselotte 7 comportant alors, dans toute section perpendiculaire au plan 4 de balancier et à un plan passant par l'axe de balancier 3, un profil aérodynamique 28 rayonné ou/et pentu pour réduire son frottement dans l'air.
Advantageously, each weight 7 is profiled in a particular way, so as to allow, separately or at the same time:
  • balancing facilitated by the existence of at least one plane surface, which is constituted either by a so-called parallel flat surface 26, which is parallel to the balance plane 4, or by a flat end surface 27 which is perpendicular to the plane 4 and a radial stem from the balance shaft 3. A same flyweight 7 may comprise both one or more parallel surfaces 26, and one or more end surfaces 27, in particular, as visible in the figures, an end surface on the first part 10 or the stud, and an end surface 27 on the second part 11 or the adjusting screw 12. It is then easy to achieve balancing by milling or etching or other on one of these surfaces 26 and / or 27, or by adding material, in particular by brazing, welding or plasma if the stud 10 and / or the adjusting screw 12 is metallic;
  • a reduced aerodynamic drag, the flyweight 7 then comprising, in any section perpendicular to the balance plane 4 and to a plane passing through the balance shaft 3, an aerodynamic profile 28 radiated and / or sloping to reduce its friction in the air .

De façon préférée, toutes les masselottes que comporte le balancier 1 sont des masselottes 7 en deux parties 10 et 11 telles que décrites ci-dessus.Preferably, all the weights that includes the balance 1 are weights 7 in two parts 10 and 11 as described above.

De façon préférée et propre à l'invention, la serge 5 est réalisée de façon monobloc avec la surface de jonction 6 et le moyeu 2 dans du silicium de préférence, ou un matériau micro-usinable, ou en quartz, ou selon le procédé LIGA.In a preferred manner and specific to the invention, the serge 5 is made integrally with the junction surface 6 and the hub 2 in silicon preferably, or a micro-machinable material, or in quartz, or according to the LIGA method .

L'emploi du silicium permet un dimensionnement en diamètre sensiblement supérieur à ce que l'on aurait, à inertie semblable, avec un balancier de facture traditionnelle. Ici, les balanciers des trois variantes présentées ont un diamètre de l'ordre de 7 mm.The use of silicon allows dimensioning in diameter substantially greater than one would, at similar inertia, with a balance of traditional invoice. Here, the rockers of the three variants presented have a diameter of about 7 mm.

Le choix du silicium, en particulier, autorise la réalisation, dans la serge, de moyens de maintien élastique des masselottes 7, notamment sous forme de lèvre élastique 15. De la même façon, des moyens d'arrêt sous forme de cliquets peuvent être combinés à de telles lames ou à des ressorts réalisés dans la serge en silicium.The choice of silicon, in particular, authorizes the production, in the serge, of elastic holding means of the weights 7, in particular in the form of an elastic lip 15. In the same way, stop means in the form of ratchets can be combined to such blades or springs made in the silicon serge.

Ce choix du silicium ou du liga permet, par l'excellente résolution lors du façonnage, d'assurer une géométrie très précise de la serge 5, et ainsi d'éviter tous les jeux générateurs de vibrations et préjudiciables au bon fonctionnement de l'oscillateur.This choice of silicon or liga makes it possible, by the excellent resolution during the shaping, to ensure a very precise geometry of the serge 5, and thus to avoid all games generating vibrations and detrimental to the proper functioning of the oscillator .

Le choix du silicium permet de surcroît d'insérer au balancier des gravures, des décors, et d'effectuer une structuration de surface.The choice of silicon allows moreover to insert the pendulum engravings, decorations, and perform a surface structuring.

De façon préférée, chacune des parties 10,11, de chaque masselotte 7 est réalisée en un matériau, qui est un métal lourd, ou du bronze au béryllium, ou de l'or ou du platine ou du tantale ou du molybdène, ou un de leurs oxydes ou de leurs nitrures, ou un de leurs alliages, ou un des complexes développés sur leurs bases.Preferably, each of the portions 10, 11, of each weight 7 is made of a material, which is a heavy metal, or beryllium bronze, or gold or platinum or tantalum or molybdenum, or a their oxides or their nitrides, or one of their alloys, or one of the complexes developed on their bases.

De façon préférée, quand la deuxième partie 11 est une vis réglante 12, il est nécessaire de concilier le très faible diamètre de la partie filetée, typiquement compris entre 0,20 et 0,30 mm environ, avec un couple de vissage/dévissage qui permette d'assurer son bon maintien dans le plot 10, ce couple étant notamment choisi entre 0,3 et 1,8 N.mm. Il faut alors disposer d'un couple de matériaux pour le plot 10 et la vis réglante 12, qui assure à la fois la tenue de la vis 12 sans dévissage, et qui interdise sa rupture à la valeur maximale du couple. Dans une réalisation préférée, ce couple de matériaux est constitué par du bronze au béryllium de type CuBe d'une part, et d'un alliage d'or, au moins de 14 carats, d'autre part. De préférence le plot 10 est en bronze au béryllium de type CuBe et la vis réglante 12 est réalisée en alliage d'or.Preferably, when the second portion 11 is a control screw 12, it is necessary to reconcile the very small diameter of the threaded portion, typically between 0.20 and 0.30 mm, with a screwing / unscrewing torque which allows to ensure its good maintenance in the stud 10, this pair being chosen in particular between 0.3 and 1.8 N.mm. It is then necessary to have a pair of materials for the stud 10 and the regulating screw 12, which ensures both the holding of the screw 12 without unscrewing, and which prevents its breaking at the maximum value of the torque. In a preferred embodiment, this pair of materials consists of beryllium bronze of CuBe type on the one hand, and a gold alloy, at least 14 karat, on the other hand. Preferably the stud 10 is beryllium bronze CuBe type and the adjusting screw 12 is made of gold alloy.

Enfin, pour une utilisation optimale, et pour augmenter encore le facteur de qualité, il convient de diminuer les frottements au niveau du pivot de ce balancier. Précisément, la masse et l'inertie réduite du balancier selon l'invention autorisent la confection d'un pivot de diamètre inférieur de 30 à 40% par rapport aux pivots usuels, ce qui a une très grande influence sur le niveau des frottements. Les trois variantes présentées sont conjuguées à un pivot d'un diamètre de 0.05 mm environ.Finally, for optimal use, and to further increase the quality factor, it is necessary to reduce the friction at the pivot of this beam. Precisely, the mass and reduced inertia of the balance according to the invention allow the manufacture of a lower diameter of the pivot of 30 to 40% relative to the usual pivots, which has a very large influence on the level of friction. The three variants presented are conjugated to a pivot with a diameter of approximately 0.05 mm.

A titre d'exemple, pour un balancier 1 d'un diamètre d'environ 7 mm et d'épaisseur de serge d'environ 0,20 mm, comportant une serge monobloc en silicium, et 4 plots 10 en CuBe ou en alliage d'or ainsi que 4 vis réglantes 12 en alliage d'or, les masses et inerties par rapport à l'axe de balancier 3, pour les trois variantes de réalisation représentées sur les figures sont les suivantes :

  • Masse serge 6,8 à 11,3 mg
  • Inertie serge 0,41 à 0,92 mg.cm2
  • Masse plots 3,1 à 17,2 mg
  • Inertie plots 0,24 à 1,13 mg.cm2
  • Masse vis 2,4 à 6,2 mg
  • Inertie vis 0,23 à 0,64 mg.cm2
  • Masse ensemble 20,6 à 26,9 mg
  • Inertie ensemble 1,80 à 1,81 mg.cm2
By way of example, for a rocker 1 with a diameter of about 7 mm and a serge thickness of about 0.20 mm, comprising a monobloc serge of silicon, and 4 pads of CuBe or alloy of Or as well as 4 adjusting screws 12 in gold alloy, the masses and inertias with respect to the balance shaft 3, for the three embodiments shown in the figures are the following:
  • Mass serge 6.8 to 11.3 mg
  • Inertia serge 0.41 to 0.92 mg.cm 2
  • Mass plots 3.1 to 17.2 mg
  • Inertia plots 0.24 to 1.13 mg.cm 2
  • Mass screw 2.4 to 6.2 mg
  • Inertia screws 0.23 to 0.64 mg.cm 2
  • Mass together 20.6 to 26.9 mg
  • Inertia together 1.80 to 1.81 mg.cm 2

On notera, encore, que, selon l'invention, le balourd des masselottes 7 se décompose entre une partie de balourd qui est fixe, et une partie du balourd qui est mobile et fait office de réglage. Ainsi, dans la deuxième variante de la figure 2, les plots 10 constituent la partie réglante du balourd, et les vis 12 sont fixes en translation et constituent la partie fixe du balourd. Dans la troisième variante de la figure 4, c'est l'inverse : les plots 10 constituent la partie fixe du balourd, et les vis 12 en constituent la partie réglante.It will be noted, again, that, according to the invention, the unbalance of the weights 7 is decomposed between an unbalance part which is fixed, and a part of the unbalance which is movable and serves as an adjustment. So, in the second variant of the figure 2 , the studs 10 constitute the regulating part of the unbalance, and the screws 12 are fixed in translation and constitute the fixed part of the unbalance. In the third variant of the figure 4 it is the opposite: the studs 10 constitute the fixed part of the unbalance, and the screws 12 constitute the regulating part.

De préférence, pour une inertie donnée, la partie réglante est toujours de la même valeur. Dans les exemples ci-dessus, l'inertie de la partie réglante est voisine de 0,25 mg.cm2.Preferably, for a given inertia, the regulating part is always of the same value. In the examples above, the inertia of the regulating portion is close to 0.25 mg.cm 2 .

Le facteur de qualité mesuré est voisin de 500 pour les trois variantes. Ce facteur de qualité est obtenu par la conjugaison d'un spiral silicium et d'un balancier selon l'invention.The quality factor measured is close to 500 for the three variants. This quality factor is obtained by the combination of a silicon balance spring and a balance according to the invention.

La conjugaison entre d'une part ce facteur de qualité élevé, et d'autre part les possibilités de réglage et d'ajustement offertes par les plots 10 et les vis réglantes 12, qui, outre leurs fonctions de réglage propre, remplissent une fonction nouvelle, qui est de servir de plate-forme d'usinage pour rajouter ou enlever de la matière dans les opérations d'ajustement d'équilibrage et de réglage de fréquence, permet l'élimination de la raquetterie.The combination between, on the one hand, this high quality factor, and, on the other hand, the adjustment and adjustment possibilities offered by the studs 10 and the adjusting screws 12, which, in addition to their own adjustment functions, fulfill a new function. , which is to serve as a machining platform for adding or removing material in the balancing and tuning adjustment operations, allows the elimination of the racking.

Les buts que se proposait d'atteindre l'invention sont parfaitement atteints avec de telles valeurs. En particulier, un tel balancier avec une inertie inférieure à 2 mg.cm2, ici de1,80 à 1,81 mg.cm2, est tout à fait approprié pour une utilisation à 10 Hz ou davantage.The aims which the invention intended to attain are perfectly attained with such values. In particular, such a balance with an inertia less than 2 mg.cm 2 , here from 1.80 to 1.81 mg.cm 2 , is entirely suitable for use at 10 Hz or more.

Les possibilités de réglage et d'équilibrage sont de surcroît excellentes.The adjustment and balancing possibilities are also excellent.

Le réglage et l'ajustement du balancier sont très précis, et permettent au balancier d'être utilisé dans un oscillateur à haute fréquence, 10 Hz ou davantage.The adjustment and adjustment of the balance are very precise, and allow the balance to be used in a high frequency oscillator, 10 Hz or more.

La conception du balancier autorise un ajustement très précis de la fréquence d'oscillation du balancier-spiral dans lequel il est intégré.The design of the balance allows a very precise adjustment of the oscillation frequency of the sprung balance in which it is integrated.

L'invention comporte encore un balancier-spiral incorporant au moins un tel balancier 1 selon l'invention.The invention also comprises a sprung balance incorporating at least one such balance 1 according to the invention.

L'invention concerne encore une pièce d'horlogerie incorporant au moins un tel balancier-spiral ou au moins un tel balancier 1.The invention also relates to a timepiece incorporating at least one such sprung balance or at least one such rocker 1.

Claims (17)

Balancier (1) pour pièce d'horlogerie, à réglage d'inertie pour ajuster sa fréquence d'oscillation, comportant un moyeu (2) agencé pour coopérer avec un axe de balancier (3) perpendiculaire à un plan de balancier (4), et une serge périphérique (5) continue ou discontinue, reliée audit moyeu (2) par au moins une surface de jonction (6), ledit balancier (1) comportant encore au moins une masselotte d'inertie (7), ladite au moins une masselotte (7) étant rapportée sur ladite serge (5) dans un logement (8) que comporte la périphérie de ladite serge (5) pour sa réception, caractérisé en ce que : - ladite au moins une masselotte (7) comporte des moyens de guidage (9) de profil complémentaire à des moyens de guidage complémentaires (9A) que comporte ledit logement (8); - chaque dite au moins une masselotte (7) comporte au moins deux parties (10, 11), réglables en translation l'une par rapport à l'autre dans un plan parallèle audit plan (4) dudit balancier (1), et dont l'une desdites parties (10 ; 11) est immobile en translation par rapport à ladite serge (5) ; - chacune desdites parties (10, 11) de ladite au moins une masselotte (7) est réalisée en un matériau qui est plus dense qu'un premier matériau constitutif de ladite serge (5). Pendulum (1) for a timepiece, with inertia adjustment for adjusting its oscillation frequency, comprising a hub (2) arranged to cooperate with a balance shaft (3) perpendicular to a balance plane (4), and a continuous or discontinuous peripheral serge (5) connected to said hub (2) by at least one junction surface (6), said rocker (1) also comprising at least one flyweight (7), said at least one weight (7) being attached to said serge (5) in a housing (8) that comprises the periphery of said serge (5) for its reception, characterized in that : - Said at least one feeder (7) comprises guiding means (9) of complementary profile to complementary guiding means (9A) that comprises said housing (8); each said at least one feeder (7) comprises at least two parts (10, 11), adjustable in translation relative to one another in a plane parallel to said plane (4) of said balance (1), and one of said parts (10; 11) is motionless in translation with respect to said serge (5); each of said portions (10, 11) of said at least one feeder (7) is made of a material which is denser than a first material constituting said serge (5). Balancier (1) selon la revendication 1, caractérisé en ce que ladite au moins une masselotte (7) comporte une première partie (10) comportant lesdits moyens de guidage (9), et une deuxième partie (11) constituée par une vis réglante (12), dont un filetage, ou respectivement un taraudage, coopère avec un taraudage, respectivement un filetage, que comporte ladite première partie (10), et dont ledit filetage, ou respectivement ledit taraudage, est à distance de ladite serge (5) ou de ladite surface de jonction (6).Balance (1) according to claim 1, characterized in that said at least one flyweight (7) comprises a first portion (10) comprising said guide means (9), and a second portion (11) constituted by a regulating screw ( 12), of which a thread, or respectively a tapping, cooperates with a tapping, respectively a threading, that includes said first portion (10), and said threading, or said tapping, is at a distance from said serge (5) or of said joining surface (6). Balancier (1) selon la revendication 2, caractérisé en ce que le vissage ou le dévissage de ladite vis réglante (12) rapproche ou éloigne, ou inversement, une extrémité de ladite vis (12) de ladite serge (5), ladite première partie (10) étant immobile en translation.Pendulum (1) according to claim 2, characterized in that the screwing or unscrewing of said adjusting screw (12) moves or removes, or conversely, an end of said screw (12) of said serge (5), said first part (10) being motionless in translation. Balancier (1) selon la revendication 2, caractérisé en ce que le vissage ou le dévissage de ladite vis réglante (12) rapproche ou éloigne, ou inversement, une extrémité de ladite au moins une masselotte (7) porteuse de ladite au moins une vis (12) de ladite serge (5), ladite au moins une vis (12) étant immobile en translation.Pendulum (1) according to claim 2, characterized in that the screwing or unscrewing of said adjusting screw (12) moves or removes, or conversely, one end of said at least one flyweight (7) carrying said at least one screw (12) of said serge (5), said at least one screw (12) being immobile in translation. Balancier (1) selon la revendication précédente, caractérisé en ce que ladite vis réglante (12) comporte un épaulement (18), respectivement une gorge, agencée pour coopérer de façon complémentaire avec une gorge (19), respectivement un épaulement, que comporte ladite serge (5).Balance (1) according to the preceding claim, characterized in that said adjusting screw (12) has a shoulder (18), respectively a groove, arranged to cooperate in a complementary manner with a groove (19), respectively a shoulder, that includes serge (5). Balancier (1) selon la revendication précédente, caractérisé en ce qu'il comporte des moyens de dégagement borgnes (20) du côté dudit moyeu (2) et agencés pour permettre l'insertion de ladite au moins une masselotte (7) vers ledit moyeu (2), puis la mise en position de ladite au moins une vis réglante (12) par coopération entre ledit épaulement (18) et ladite gorge (19), ladite au moins une vis réglante (12) étant alors plus éloignée dudit moyeu (2) que ladite masselotte (7) avec laquelle elle constitue un ensemble imperdable quand elles sont liées par un filetage, respectivement taraudage de l'une, coopérant avec un taraudage, respectivement un filetage de l'autre.Balance (1) according to the preceding claim, characterized in that it comprises blind release means (20) on the side of said hub (2) and arranged to allow the insertion of said at least one flyweight (7) to said hub (2), then placing said at least one adjusting screw (12) in position by cooperation between said shoulder (18) and said groove (19), said at least one adjusting screw (12) then being further away from said hub ( 2) that said flyweight (7) with which it constitutes a captive assembly when they are connected by a thread, respectively tapping of one, cooperating with a thread, respectively a thread of the other. Balancier (1) selon la revendication 2, caractérisé en ce que ladite au moins une masselotte (7) comporte au moins deux vis réglantes d'inertie (12).Pendulum (1) according to claim 2, characterized in that said at least one feeder (7) comprises at least two adjusting screws of inertia (12). Balancier (1) selon l'une des revendications précédentes, caractérisé en ce que ladite au moins une masselotte (7) est maintenue dans ledit logement (8) par des moyens de maintien (13) qui sont des moyens de maintien élastique agencés pour autoriser l'introduction de ladite au moins une masselotte (7) dans ledit logement (8) et pour interdire son extraction.Pendulum (1) according to one of the preceding claims, characterized in that said at least one feeder (7) is held in said housing (8) by holding means (13) which are elastic holding means arranged to allow the insertion of said at least one feeder (7) into said housing (8) and to prohibit its extraction. Balancier (1) selon la revendication précédente, caractérisé en ce que lesdits moyens de maintien élastique sont constitués par des moyens de clipage (14) que comporte ladite au moins une masselotte (7), et qui sont agencés pour coopérer de façon élastique avec des moyens de clipage complémentaire (14A) que comporte ladite serge (5), lesdits moyens de clipage (14) étant constitués par au moins une lèvre élastique (15) que comporte ladite au moins une masselotte (7) ou ledit logement (8), ladite au moins une lèvre élastique (15) étant agencée pour fléchir dans une position de compression pendant une première course d'introduction de ladite au moins une masselotte (7) dans ledit logement (8) et autoriser ladite introduction, et pour se détendre dans une position de détente dans un embrèvement (16) que comporte respectivement ledit logement (8) ou ladite au moins une masselotte (7) et constituant lesdits moyens de clipage complémentaire (14A), dans une position de service ou bien dans une deuxième course réglante de ladite au moins une masselotte (7), ladite deuxième course réglante faisant suite à ladite première course d'introduction, ladite au moins une lèvre élastique (15) comportant une surface d'arrêt (17) dans ladite position de détente agencée pour venir en butée avec une surface d'arrêt complémentaire (17A) disposée en retour que comporte ledit logement (8) ou ladite au moins une masselotte (7).Balance (1) according to the preceding claim, characterized in that said elastic holding means are constituted by clipping means (14) that comprises said at least one feeder (7), and which are arranged to cooperate elastically with complementary clipping means (14A) that comprises said serge (5), said clipping means (14) being constituted by at least one elastic lip (15) that comprises said at least one feeder (7) or said housing (8), said at least one elastic lip (15) being arranged to flex in a compression position during a first insertion stroke of said at least one flyweight (7) into said housing (8) and allow said insertion, and to relax in a detent position in a recess (16) that respectively comprises said housing (8) or said at least one feeder (7) and constituting said complementary clipping means (14A), in a position of service or in a second regulating stroke of said at least one flyweight (7), said second regulating race following said first insertion stroke, said at least one elastic lip (15) having a stop surface (17) in said detent position arranged to abut with a complementary stop surface (17A) arranged in return that includes said housing (8) or said at least one feeder (7). Balancier (1) selon l'une des revendications précédentes, caractérisé en ce qu'il comporte au moins deux masselottes (7A, 7B), chacune rapportée sur ladite serge (5) dans un logement (8A, 8B), que comporte la périphérie de ladite serge (5) pour sa réception, comportant chacune des moyens de guidage de profil complémentaire à des moyens de guidage complémentaires que comporte ledit logement (8A, 8B), comportant chacune au moins deux parties (10, 11) réglables en translation l'une par rapport à l'autre dans un plan parallèle audit plan (4) dudit balancier (1), et chacune desdites parties (10, 11) de chacune desdites masselottes (7A, 7B), étant réalisée en un matériau qui est plus dense qu'un premier matériau constitutif de ladite serge (5).Balance (1) according to one of the preceding claims, characterized in that it comprises at least two flyweights (7A, 7B), each attached to said serge (5) in a housing (8A, 8B), which comprises the periphery of said serge (5) for its reception, each comprising means for guiding profile complementary to complementary guiding means that comprises said housing (8A, 8B), each having at least two portions (10, 11) adjustable in translation one with respect to the other in a plane parallel to said plane (4) of said beam (1), and each of said parts (10, 11) of each of said weights (7A, 7B) being made of a material which is denser than a first material constituting said serge (5). Balancier (1) selon la revendication précédente, caractérisé en ce que lesdites masselottes (7A, 7B), sont symétriques deux à deux par rapport à un plan passant par ledit moyeu (2) et ledit axe de balancier (3), ou/et sont symétriques deux à deux par rapport audit moyeu (2).Balance (1) according to the preceding claim, characterized in that said flyweights (7A, 7B) are symmetrical in pairs relative to a plane passing through said hub (2) and said balance shaft (3), and / or are symmetrical two by two with respect to said hub (2). Balancier (1) selon l'une des revendications précédentes, caractérisé en ce que chaque dite masselotte (7) comporte au moins une surface plane constituée, ou d'une surface parallèle (26) parallèle audit plan de balancier (4), ou d'une surface de bout (27) perpendiculaire audit plan de balancier (4) et à une radiale issue dudit axe de balancier (3), ladite surface plane étant agencée apte à servir de plate-forme d'usinage pour rajouter ou enlever de la matière dans des opérations d'ajustement d'équilibrage et de réglage de fréquence, et ladite masselotte (7) comporte, dans toute section perpendiculaire audit plan (4) de balancier et à un plan passant par ledit axe de balancier (3), un profil aérodynamique (28) rayonné ou/et pentu pour réduire son frottement dans l'air.Pendulum (1) according to one of the preceding claims, characterized in that each said weight (7) comprises at least one plane surface formed, or a parallel surface (26) parallel to said balance plane (4), or d an end surface (27) perpendicular to said balance plane (4) and a radial end of said balance shaft (3), said planar surface being arranged to serve as a machining platform to add or remove material in balancing and frequency adjustment adjustment operations, and said weight (7) comprises, in any section perpendicular to said balance plane (4) and to a plane passing through said balance shaft (3), a aerodynamic profile (28) radiated or / and sloping to reduce its friction in the air. Balancier (1) selon l'une des revendications précédentes, caractérisé en ce que ladite surface de jonction (6) est ajourée, et comporte, séparées par des nervures (30), des poches (29) traversantes sur toute l'épaisseur de ladite surface de jonction (6), ou/et des poches (31) borgnes, non traversantes, sur une partie seulement de l'épaisseur de ladite surface de jonction (6).Pendulum (1) according to one of the preceding claims, characterized in that said junction surface (6) is perforated, and comprises, separated by ribs (30), pockets (29) through the entire thickness of said joining surface (6), or / and blind pockets (31), not traversing, on only a portion of the thickness of said joining surface (6). Balancier (1) selon l'une des revendications précédentes, caractérisé en ce que ladite serge (5) est réalisée de façon monobloc avec ladite surface de jonction (6) et ledit moyeu (2) en silicium ou dans un matériau micro-usinable ou en quartz ou en liga.Pendulum (1) according to one of the preceding claims, characterized in that said serge (5) is made integrally with said junction surface (6) and said hub (2) made of silicon or a micro-machinable material or quartz or liga. Balancier (1) selon l'une des revendications précédentes, caractérisé en ce que chacune desdites parties de ladite au moins une masselotte (7) est réalisée en un matériau, qui est un métal lourd ou du bronze au béryllium ou de l'or ou du platine ou du tantale ou du molybdène ou un de leurs oxydes ou de leurs nitrures, ou un de leurs alliages, ou un des complexes développés sur leurs bases.Pendulum (1) according to one of the preceding claims, characterized in that each of said parts of said at least one feeder (7) is made of a material, which is a heavy metal or beryllium bronze or gold or platinum or tantalum or molybdenum or one of their oxides or their nitrides, or one of their alloys, or one of the complexes developed on their bases. Balancier-spiral incorporant au moins un balancier (1) selon l'une des revendications précédentes.Spiral balance incorporating at least one balance (1) according to one of the preceding claims. Pièce d'horlogerie incorporant au moins un balancier-spiral selon la revendication précédente, ou au moins un balancier (1) selon l'une des revendications 1 à 15.Timepiece incorporating at least one sprung balance according to the preceding claim, or at least one balance (1) according to one of claims 1 to 15.
EP20100165704 2010-06-11 2010-06-11 High frequency balance wheel for timepiece Active EP2395402B1 (en)

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EP13184692.5A EP2677369B1 (en) 2010-06-11 2010-06-11 High frequency balance wheel for timepiece
EP20100165704 EP2395402B1 (en) 2010-06-11 2010-06-11 High frequency balance wheel for timepiece

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Cited By (10)

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EP2607970A1 (en) * 2011-12-22 2013-06-26 The Swatch Group Research and Development Ltd. Method for improving the pivoting of a mobile device
WO2013092172A1 (en) * 2011-12-22 2013-06-27 The Swatch Group Research And Development Ltd Method for improving the pivotal movement of a mobile body
WO2014114379A1 (en) * 2013-01-25 2014-07-31 Isa France Sas Oscillating clockmaking part
DE102014220009A1 (en) 2013-10-02 2015-04-02 Sercalo Microtechnology Ltd. Balance for movements with adjustable moment of inertia
JP2016045209A (en) * 2014-08-26 2016-04-04 ニヴァロックス−ファー ソシエテ アノニム Balance with inertia adjustment function
EP2410386B1 (en) * 2010-07-19 2018-10-03 Nivarox-FAR S.A. balance wheel with inertia adjustment with insert
EP3502787A1 (en) * 2017-12-22 2019-06-26 The Swatch Group Research and Development Ltd Method for manufacturing a balance for a timepiece
EP3502786A1 (en) * 2017-12-22 2019-06-26 The Swatch Group Research and Development Ltd Balance for timepiece and method for manufacturing such a balance
EP2551732B1 (en) * 2011-07-29 2020-05-06 Rolex S.A. Balance with optimised pivotal movement
CN111142353A (en) * 2018-11-05 2020-05-12 瑞士电子显微技术研究与开发中心股份有限公司 Balance wheel for a timepiece

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EP3671364A1 (en) * 2018-12-17 2020-06-24 Nivarox-FAR S.A. Elastic holding member for fixing a timepiece component on a support element

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EP1562087A1 (en) 2004-02-05 2005-08-10 Montres Breguet S.A. Balance for a watch mechanism
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CH16676A (en) * 1898-05-11 1899-01-15 Henri Sandoz Watch balance with variable moment of inertia
CH276466A (en) * 1949-01-27 1951-07-15 Calame Ariste Watch balance with adjustable moment of inertia.
CH339573A (en) * 1957-06-24 1959-06-30 Henri Sandoz & Fils Balance wheel for timepiece
FR1275357A (en) 1960-12-01 1961-11-03 Straumann Inst Ag Balance wheel for watches
FR1301938A (en) 1961-07-11 1962-08-24 Lip Sa Balance wheel for a clockwork mechanism and its manufacturing process
GB2416408A (en) * 2003-10-20 2006-01-25 Gideon R Levingston Balance Wheel, Balance Spring and Other Components and Assemblies for a Mechanical Oscillator System and Methods of Manufacture
EP1562087A1 (en) 2004-02-05 2005-08-10 Montres Breguet S.A. Balance for a watch mechanism
WO2008080570A2 (en) * 2006-12-21 2008-07-10 Complitime S.A. Mechanical oscillator for timepiece
EP2104005A1 (en) * 2008-03-20 2009-09-23 Nivarox-FAR S.A. Composite balance and method of manufacturing thereof

Cited By (30)

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Publication number Priority date Publication date Assignee Title
EP2410386B1 (en) * 2010-07-19 2018-10-03 Nivarox-FAR S.A. balance wheel with inertia adjustment with insert
EP2596407B1 (en) * 2010-07-19 2018-11-21 Nivarox-FAR S.A. Balance having inertia adjustment using an insert
EP2551732B1 (en) * 2011-07-29 2020-05-06 Rolex S.A. Balance with optimised pivotal movement
US9645551B2 (en) 2011-12-22 2017-05-09 The Swatch Group Research And Development Ltd Method of improving the pivoting of a wheel set
WO2013092173A1 (en) * 2011-12-22 2013-06-27 The Swatch Group Research And Development Ltd Method for improving the pivotal movement of a mobile body
CN104169814A (en) * 2011-12-22 2014-11-26 斯沃奇集团研究和开发有限公司 Method for improving the pivotal movement of a mobile body
JP2015508492A (en) * 2011-12-22 2015-03-19 ザ・スウォッチ・グループ・リサーチ・アンド・ディベロップメント・リミテッド How to improve wheelset turning
WO2013092172A1 (en) * 2011-12-22 2013-06-27 The Swatch Group Research And Development Ltd Method for improving the pivotal movement of a mobile body
JP2015511307A (en) * 2011-12-22 2015-04-16 ザ・スウォッチ・グループ・リサーチ・アンド・ディベロップメント・リミテッド How to improve wheelset turning
RU2573811C1 (en) * 2011-12-22 2016-01-27 Те Свотч Груп Рисерч Энд Дивелопмент Лтд Perfected revolution of set of wheels
RU2573701C1 (en) * 2011-12-22 2016-01-27 Те Свотч Груп Рисерч Энд Дивелопмент Лтд Perfected revolution of set of wheels
CN104011609A (en) * 2011-12-22 2014-08-27 斯沃奇集团研究和开发有限公司 Method For Improving The Pivotal Movement Of A Mobile Body
US9310774B2 (en) 2011-12-22 2016-04-12 The Swatch Group Research And Development Ltd Method of improving the pivoting of a wheel set
CN104169814B (en) * 2011-12-22 2017-03-15 斯沃奇集团研究和开发有限公司 The method for improving the pivot of wheel set
EP2607970A1 (en) * 2011-12-22 2013-06-26 The Swatch Group Research and Development Ltd. Method for improving the pivoting of a mobile device
WO2014114379A1 (en) * 2013-01-25 2014-07-31 Isa France Sas Oscillating clockmaking part
DE102014220009A1 (en) 2013-10-02 2015-04-02 Sercalo Microtechnology Ltd. Balance for movements with adjustable moment of inertia
JP2016045209A (en) * 2014-08-26 2016-04-04 ニヴァロックス−ファー ソシエテ アノニム Balance with inertia adjustment function
EP3502786A1 (en) * 2017-12-22 2019-06-26 The Swatch Group Research and Development Ltd Balance for timepiece and method for manufacturing such a balance
WO2019120959A1 (en) * 2017-12-22 2019-06-27 The Swatch Group Research And Development Ltd Balance for timepiece and method for manufacturing such a balance
CN109960137A (en) * 2017-12-22 2019-07-02 斯沃奇集团研究和开发有限公司 Method for manufacturing the balance wheel of clock and watch
EP3502787A1 (en) * 2017-12-22 2019-06-26 The Swatch Group Research and Development Ltd Method for manufacturing a balance for a timepiece
CN111492318A (en) * 2017-12-22 2020-08-04 斯沃奇集团研究和开发有限公司 Balance for a timepiece and method of manufacturing such a balance
EP3796102A1 (en) * 2017-12-22 2021-03-24 The Swatch Group Research and Development Ltd Method for manufacturing a balance for a timepiece
CN109960137B (en) * 2017-12-22 2021-04-09 斯沃奇集团研究和开发有限公司 Method for manufacturing balance wheel of clock
CN112965355A (en) * 2017-12-22 2021-06-15 斯沃奇集团研究和开发有限公司 Method for manufacturing balance wheel of clock
US11307535B2 (en) 2017-12-22 2022-04-19 The Swatch Group Research And Development Ltd Process for producing a balance wheel for a timepiece
US11640140B2 (en) 2017-12-22 2023-05-02 The Swatch Group Research And Development Ltd Process for producing a balance wheel for a timepiece
US11809137B2 (en) 2017-12-22 2023-11-07 The Swatch Group Research And Development Ltd Balance for timepieces and method for manufacturing the same
CN111142353A (en) * 2018-11-05 2020-05-12 瑞士电子显微技术研究与开发中心股份有限公司 Balance wheel for a timepiece

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