EP4194964A1 - Balance wheel with inertia adjustment - Google Patents

Balance wheel with inertia adjustment Download PDF

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Publication number
EP4194964A1
EP4194964A1 EP21213656.8A EP21213656A EP4194964A1 EP 4194964 A1 EP4194964 A1 EP 4194964A1 EP 21213656 A EP21213656 A EP 21213656A EP 4194964 A1 EP4194964 A1 EP 4194964A1
Authority
EP
European Patent Office
Prior art keywords
pair
balance
flyweights
weights
hub
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.)
Pending
Application number
EP21213656.8A
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German (de)
French (fr)
Inventor
Laurent Jeanneret
Emmanuel Graf
Marco Verardo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nivarox Far SA
Original Assignee
Nivarox Far SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nivarox Far SA filed Critical Nivarox Far SA
Priority to EP21213656.8A priority Critical patent/EP4194964A1/en
Priority to US17/815,392 priority patent/US20230185241A1/en
Priority to JP2022132985A priority patent/JP2023086663A/en
Priority to CN202211074838.6A priority patent/CN116256960A/en
Publication of EP4194964A1 publication Critical patent/EP4194964A1/en
Pending legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/04—Oscillators acting by spring tension
    • G04B17/06—Oscillators with hairsprings, e.g. balance
    • G04B17/063—Balance construction
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/20—Compensation of mechanisms for stabilising frequency
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B18/00—Mechanisms for setting frequency
    • G04B18/006—Mechanisms for setting frequency by adjusting the devices fixed on the balance

Definitions

  • the invention relates to a balance with inertia adjustment having inertia adjustment means.
  • the invention also relates to a timepiece movement comprising such a system as well as a timepiece equipped with such a movement.
  • a balance wheel is known whose moment of inertia is adjustable by means of adjustment screws which are arranged at its periphery.
  • This type of device is known in particular within mechanical oscillators whose base frequency of the oscillator is adjusted by the moment of inertia of the balance wheel.
  • a pendulum comprises a rim, arms and a certain arrangement of screws or flyweights fixed to the rim or the arm of the pendulum which make it possible, by adjusting their positions, to modify the moment of inertia of the pendulum.
  • These screws or weights are positioned using keys or screwdrivers which allow their position to be adjusted.
  • the object of the invention is in particular to overcome the various drawbacks of these known techniques.
  • an object of the invention is to provide a balance wheel with inertia adjustment allowing easy and rapid adjustment.
  • the invention also aims, at least in one particular embodiment, to provide a balance with inertia adjustment which is simple to implement and inexpensive to produce.
  • a balance wheel for a clockwork movement comprising rigid parts constituted by a hub defining the pivot axis of said balance wheel, a rim, four arms connecting said rim to the hub, and comprising four slots for receiving and pinching a flyweight in position, each slot being delimited on the one hand by an arm, and on the other hand by an elastic arm comprising a first end secured to said arm, and a second distal end free with respect to said hub, said arm, and said serge sector.
  • the balance comprises two pairs of weights, each pair of weights having different masses to ensure different regulating powers, a first pair of flyweights allowing coarse adjustment, and a second pair of flyweights allowing fine adjustment.
  • the invention also relates to a timepiece movement comprising a balance according to the invention.
  • the invention also relates to a timepiece comprising a timepiece movement in accordance with the invention.
  • the pendulum 1 for a clock movement provided with a device for adjusting its inertia making it possible to adjust the frequency of oscillation of said pendulum, comprises rigid parts constituted by a hub 2 defining the pivot axis A of the pendulum 1, a rim 3 of circular shape, four arms 4 connecting said rim 3 to the hub 2, and comprising four slots 7 for receiving and clamping in position a flyweight 6,6'.
  • Each slot 7 is delimited on the one hand by an arm 4, and on the other hand by an elastic arm 5 comprising a first end 5B secured to said arm 4, and a second distal end 5A free with respect to said hub 2, to said arm 4 , and said sector of serge 3.
  • the balance 1 comprises four arms, forming a hub 4 at their intersection, the hub 4 being provided with an orifice 40 intended to receive a balance shaft.
  • Slot 7 is delimited by a rigid part of arm 4 and by an elastic arm 5 which is permanently biased towards arm 4 when the flyweight is inserted into slot 7.
  • the balance comprises two pairs of flyweights 6, 6', each pair of flyweights having different dimensions to ensure different regulating powers, a first pair of flyweights 6 allowing coarse adjustment, and a second pair of flyweights 6 'allowing fine tuning.
  • the flyweights 6, 6' of each pair are arranged in slots 7 facing each other with respect to the pivot axis A of the balance, or still arranged according to an axial symmetry of axis A, for a balanced distribution of the masses on the balance wheel 1.
  • the flyweights 6 of the first pair are larger than the flyweights 6' of the second pair, or vice versa.
  • the flyweights 6 of the first pair and the flyweights 6' of the second pair are arranged on a separate radius of the balance wheel.
  • the weights 6 of the first pair are arranged on a first radius close to the rim 3 and the weights 6' of the second pair are arranged on a second radius close to the hub 2 of the balance wheel, the pair of weights 6' near the hub 2 of the balance allowing fine adjustment.
  • the flyweights 6 of the first pair are heavier than the flyweights 6' of the second pair, or vice versa.
  • different materials can be used to make the flyweights 6,6'.
  • the weights 6 are made of gold or a gold alloy such as 18K 3N gold, and the weights 6' are made of titanium or a titanium alloy such as grade 5 titanium.
  • the flyweights 6,6' comprise a head 61 in the form of a disc and optionally a foot 62 of cylindrical shape.
  • slot 7 has a shape complementary to that of head 61 or foot 62 of flyweight 6, 6'.
  • This embodiment is particularly advantageous because it makes it possible to limit the thickness of the balance 1 once the flyweights 6,6' have been mounted on the balance 1.
  • flyweights 6,6' When the flyweights 6,6' are placed in the slots 7, the flyweights 6,6' are pinched in the slots 7 and are held by friction in their position under the effect of the elasticity of the elastic arm 5.
  • each flyweight 6,6' has a flat 64 on the disk forming the head 61.
  • Such a configuration therefore allows simple and rapid adjustment of the balance, the larger and/or heavier weights initially allowing coarse adjustment to be made, and the smaller and/or lighter weights subsequently allowing fine-tune the setting.
  • the invention also relates to a timepiece movement and a timepiece equipped with a balance according to the invention.
  • a compact balance wheel is available which makes it possible to adjust the position of the flyweights easily and inexpensively to manufacture.

Abstract

L'invention se rapporte à un balancier pour mouvement d'horlogerie, comprenant des parties rigides constituées par un moyeu définissant l'axe de pivotement dudit balancier, une serge, quatre bras reliant ledit la serge au moyeu, et comportant quatre fentes pour la réception et le pincement en position d'une masselotte, chaque fente étant délimitée d'une part par un bras, et d'autre part par un bras élastique comportant une première extrémité solidaire dudit bras, et une deuxième extrémité distale libre par rapport audit moyeu, audit bras, et audit secteur de serge. Selon l'invention, le balancier comprend deux paires de masselottes, chaque paire de masselottes présentant des masses différentes pour assurer des pouvoirs réglants différents, une première paire de masselotte permettant un réglage grossier, et une seconde paire de masselotte permettant un réglage fin.The invention relates to a pendulum for a clock movement, comprising rigid parts consisting of a hub defining the pivot axis of said pendulum, a rim, four arms connecting said rim to the hub, and comprising four slots for receiving and the clamping in position of a weight, each slot being delimited on the one hand by an arm, and on the other hand by an elastic arm comprising a first end secured to said arm, and a second distal end free with respect to said hub, to said arm, and to said serge area. According to the invention, the balance comprises two pairs of flyweights, each pair of flyweights having different masses to ensure different regulating powers, a first pair of flyweights allowing coarse adjustment, and a second pair of flyweights allowing fine adjustment.

Description

Domaine technique de l'inventionTechnical field of the invention

L'invention se rapporte à un balancier à réglage d'inertie présentant des moyens de réglage de l'inertie.The invention relates to a balance with inertia adjustment having inertia adjustment means.

L'invention concerne également un mouvement d'horlogerie comprenant un tel système ainsi qu'une pièce d'horlogerie équipée d'un tel mouvement.The invention also relates to a timepiece movement comprising such a system as well as a timepiece equipped with such a movement.

Arrière-plan technologiqueTechnology background

Il est connu un balancier dont le moment d'inertie est ajustable par le biais de vis de réglage qui sont disposées à sa périphérie. Ce type de dispositif est connu notamment au sein d'oscillateurs mécaniques dont la fréquence de base de l'oscillateur est ajustée par le moment d'inertie du balancier. De manière générale, un tel balancier comprend une serge, des bras et un certain agencement de vis ou masselottes fixées sur la serge ou le bras du balancier qui permettent, en ajustant leurs positions, de modifier le moment d'inertie du balancier. Ces vis ou masselottes sont positionnées par le biais de clés ou de tournevis qui permettent d'ajuster leur position.A balance wheel is known whose moment of inertia is adjustable by means of adjustment screws which are arranged at its periphery. This type of device is known in particular within mechanical oscillators whose base frequency of the oscillator is adjusted by the moment of inertia of the balance wheel. In general, such a pendulum comprises a rim, arms and a certain arrangement of screws or flyweights fixed to the rim or the arm of the pendulum which make it possible, by adjusting their positions, to modify the moment of inertia of the pendulum. These screws or weights are positioned using keys or screwdrivers which allow their position to be adjusted.

Il est par exemple connu du brevet CH264669 un balancier doté de vis de réglage dénuées de tête qui sont vissées depuis l'extérieur de la serge de balancier et qui sont noyées dans son épaisseur. Cette réalisation vise à remplacer avantageusement les balanciers munis de vis dont les têtes sont disposées soit en saillie sur la périphérie de la serge, soit dans un évidement de la serge.It is for example known from the patent CH264669 a balance equipped with headless adjusting screws which are screwed from the outside of the balance rim and which are embedded in its thickness. This embodiment is intended to advantageously replace the rockers provided with screws whose heads are arranged either projecting on the periphery of the rim, or in a recess of the rim.

On connait également du brevet EP1837719B1 une serge de balancier comportant des plots de matière dirigés radialement vers l'intérieur du balancier, qui sont chacun traversés par un trou taraudé afin d'accueillir des masselottes qui sont vissées depuis l'intérieur du balancier. Dans cette configuration, la préhension des masselottes n'est pas aisée, et la serge de balancier risque ainsi d'être marquée lors du réglage.We also know from the patent EP1837719B1 a balance rim comprising studs of material directed radially towards the inside of the balance, which are each traversed by a tapped hole in order to accommodate weights which are screwed in from the inside of the balance. In this configuration, the gripping of the weights is not easy, and the balance rim thus risks being marked during adjustment.

Ces balanciers à vis de réglage présentent encore un autre inconvénient qui est la difficulté de garantir un réglage établi au cours du fonctionnement du mouvement, une ou plusieurs vis pouvant se dévisser partiellement ou totalement, ce qui nuit au bon fonctionnement et à la régularité du balancier.These balances with adjustment screws have yet another drawback which is the difficulty of guaranteeing an established adjustment during the operation of the movement, one or more screws being able to unscrew partially or totally, which is detrimental to the proper functioning and regularity of the balance. .

Résumé de l'inventionSummary of the invention

L'invention a notamment pour objectif de pallier les différents inconvénients de ces techniques connues.The object of the invention is in particular to overcome the various drawbacks of these known techniques.

Plus précisément, un objectif de l'invention est de fournir un balancier à réglage d'inertie permettant un réglage facile et rapide.More specifically, an object of the invention is to provide a balance wheel with inertia adjustment allowing easy and rapid adjustment.

L'invention a également pour objectif, au moins dans un mode de réalisation particulier, de fournir un balancier à réglage d'inertie qui soit simple à mettre en œuvre et peu coûteux à réaliser.The invention also aims, at least in one particular embodiment, to provide a balance with inertia adjustment which is simple to implement and inexpensive to produce.

Ces objectifs, ainsi que d'autres qui apparaîtront plus clairement par la suite, sont atteints selon l'invention à l'aide d'un balancier pour mouvement d'horlogerie, comprenant des parties rigides constituées par un moyeu définissant l'axe de pivotement dudit balancier, une serge, quatre bras reliant ledit la serge au moyeu, et comportant quatre fentes pour la réception et le pincement en position d'une masselotte, chaque fente étant délimitée d'une part par un bras, et d'autre part par un bras élastique comportant une première extrémité solidaire dudit bras, et une deuxième extrémité distale libre par rapport audit moyeu, audit bras, et audit secteur de serge.These objectives, as well as others which will appear more clearly subsequently, are achieved according to the invention with the aid of a balance wheel for a clockwork movement, comprising rigid parts constituted by a hub defining the pivot axis of said balance wheel, a rim, four arms connecting said rim to the hub, and comprising four slots for receiving and pinching a flyweight in position, each slot being delimited on the one hand by an arm, and on the other hand by an elastic arm comprising a first end secured to said arm, and a second distal end free with respect to said hub, said arm, and said serge sector.

Selon l'invention, le balancier comprend deux paires de masselottes, chaque paire de masselottes présentant des masses différentes pour assurer des pouvoirs réglants différents, une première paire de masselottes permettant un réglage grossier, et une seconde paire de masselottes permettant un réglage fin.According to the invention, the balance comprises two pairs of weights, each pair of weights having different masses to ensure different regulating powers, a first pair of flyweights allowing coarse adjustment, and a second pair of flyweights allowing fine adjustment.

Conformément à d'autres variantes avantageuses de l'invention :

  • chaque paire de masselottes présente des dimensions différentes, les masselottes de la première paire étant plus grandes que les masselottes de la seconde paire, ou inversement ;
  • les masselottes de la première paire sont plus lourdes que les masselottes de la seconde paire, ou inversement ;
  • les paires de masselottes sont réalisé en un matériau différent ;
  • les masselottes de la première paire et les masselottes de la seconde paire sont disposées sur un rayon distinct du balancier ;
  • les masselottes de la première paire sont disposées sur un premier rayon à proximité de la serge et les masselottes de la seconde paire sont disposées sur un second un rayon à proximité du moyeu du balancier ;
  • les bras, la serge et le moyeu forment un élément monobloc.
In accordance with other advantageous variants of the invention:
  • each pair of flyweights has different dimensions, the flyweights of the first pair being larger than the flyweights of the second pair, or vice versa;
  • the weights of the first pair are heavier than the weights of the second pair, or vice versa;
  • the pairs of flyweights are made of a different material;
  • the flyweights of the first pair and the flyweights of the second pair are arranged on a separate radius of the balance wheel;
  • the weights of the first pair are arranged on a first radius close to the rim and the weights of the second pair are arranged on a second radius close to the hub of the balance wheel;
  • the arms, rim and hub form a one-piece element.

L'invention concerne aussi un mouvement d'horlogerie comprenant un balancier conforme à l'invention.The invention also relates to a timepiece movement comprising a balance according to the invention.

L'invention concerne également une pièce d'horlogerie comprenant un mouvement horloger conforme à l'invention.The invention also relates to a timepiece comprising a timepiece movement in accordance with the invention.

Brève description des figuresBrief description of figures

D'autres caractéristiques et avantages de l'invention apparaîtront plus clairement à la lecture de la description suivante d'un mode de réalisation particulier de l'invention, donné à titre de simple exemple illustratif et non limitatif, et des figures annexées, parmi lesquelles :

  • la figure 1 est une vue en perspective d'un balancier conforme à l'invention selon un premier mode de réalisation.
Other characteristics and advantages of the invention will appear more clearly on reading the following description of a particular embodiment of the invention, given by way of simple illustrative and non-limiting example, and the appended figures, among which :
  • there figure 1 is a perspective view of a balance according to the invention according to a first embodiment.

Description détaillée de l'inventionDetailed description of the invention

Le balancier 1 pour mouvement d'horlogerie, muni d'un dispositif de réglage de son inertie permettant de régler la fréquence d'oscillation dudit balancier, comprend des parties rigides constituées par un moyeu 2 définissant l'axe de pivotement A du balancier 1, une serge 3 de forme circulaire, quatre bras 4 reliant ledit la serge 3 au moyeu 2, et comportant quatre fentes 7 pour la réception et le pincement en position d'une masselotte 6,6'.The pendulum 1 for a clock movement, provided with a device for adjusting its inertia making it possible to adjust the frequency of oscillation of said pendulum, comprises rigid parts constituted by a hub 2 defining the pivot axis A of the pendulum 1, a rim 3 of circular shape, four arms 4 connecting said rim 3 to the hub 2, and comprising four slots 7 for receiving and clamping in position a flyweight 6,6'.

Chaque fente 7 est délimitée d'une part par un bras 4, et d'autre part par un bras élastique 5 comportant une première extrémité 5B solidaire dudit bras 4, et une deuxième extrémité distale 5A libre par rapport audit moyeu 2, audit bras 4, et audit secteur de serge 3.Each slot 7 is delimited on the one hand by an arm 4, and on the other hand by an elastic arm 5 comprising a first end 5B secured to said arm 4, and a second distal end 5A free with respect to said hub 2, to said arm 4 , and said sector of serge 3.

Tel qu'illustré, le balancier 1 comprend quatre bras, formant un moyeu 4 à leur intersection, le moyeu 4 étant muni d'un orifice 40 destiné à recevoir un axe de balancier.As illustrated, the balance 1 comprises four arms, forming a hub 4 at their intersection, the hub 4 being provided with an orifice 40 intended to receive a balance shaft.

La fente 7 est délimitée par une partie rigide du bras 4 et par un bras élastique 5 qui en permanence rappelée vers le bras 4 lorsque la masselotte est insérée dans la fente 7.Slot 7 is delimited by a rigid part of arm 4 and by an elastic arm 5 which is permanently biased towards arm 4 when the flyweight is inserted into slot 7.

Selon l'invention, le balancier comprend deux paires de masselottes 6, 6', chaque paire de masselottes présentant des dimensions différentes pour assurer des pouvoirs réglants différents, une première paire de masselottes 6 permettant un réglage grossier, et une seconde paire de masselotte 6' permettant un réglage fin.According to the invention, the balance comprises two pairs of flyweights 6, 6', each pair of flyweights having different dimensions to ensure different regulating powers, a first pair of flyweights 6 allowing coarse adjustment, and a second pair of flyweights 6 'allowing fine tuning.

Les masselottes 6, 6' de chaque paire sont disposées dans des fentes 7 en vis-à-vis par rapport à l'axe de pivotement A du balancier, ou encore disposées selon un symétrie axiale d'axe A, pour une répartition équilibrée des masses sur le balancier 1.The flyweights 6, 6' of each pair are arranged in slots 7 facing each other with respect to the pivot axis A of the balance, or still arranged according to an axial symmetry of axis A, for a balanced distribution of the masses on the balance wheel 1.

De manière à distinguer les masselottes 6, 6' et les positionner correctement, les masselottes 6 de la première paire sont plus grandes que les masselottes 6' de la seconde paire, ou inversement.In order to distinguish the flyweights 6, 6' and position them correctly, the flyweights 6 of the first pair are larger than the flyweights 6' of the second pair, or vice versa.

Selon un mode de réalisation de l'invention, les masselottes 6 de la première paire et les masselottes 6' de la seconde paire sont disposées sur un rayon distinct du balancier.According to one embodiment of the invention, the flyweights 6 of the first pair and the flyweights 6' of the second pair are arranged on a separate radius of the balance wheel.

Par exemple, les masselottes 6 de la première paire sont disposées sur un premier rayon à proximité de la serge 3 et les masselottes 6' de la seconde paire sont disposées sur un second un rayon à proximité du moyeu 2 du balancier, la paire de masselottes 6' à proximité du moyeu 2 du balancier permettant un réglage fin.For example, the weights 6 of the first pair are arranged on a first radius close to the rim 3 and the weights 6' of the second pair are arranged on a second radius close to the hub 2 of the balance wheel, the pair of weights 6' near the hub 2 of the balance allowing fine adjustment.

De même, les masselottes 6 de la première paire sont plus lourdes que les masselottes 6' de la seconde paire, ou inversement. Pour cela, différents matériaux peuvent être utilisés pour réaliser les masselottes 6,6'. Par exemple, les masselottes 6 sont réalisées en or ou alliage d'or comme de l'or 18K 3N, et les masselottes 6' sont réalisées en titane ou en alliage de titane comme du titane grade 5.Similarly, the flyweights 6 of the first pair are heavier than the flyweights 6' of the second pair, or vice versa. For this, different materials can be used to make the flyweights 6,6'. For example, the weights 6 are made of gold or a gold alloy such as 18K 3N gold, and the weights 6' are made of titanium or a titanium alloy such as grade 5 titanium.

Les masselottes 6,6' comprennent une tête 61 sous la forme d'un disque et optionnellement un pied 62 de forme cylindrique.The flyweights 6,6' comprise a head 61 in the form of a disc and optionally a foot 62 of cylindrical shape.

De manière avantageuse, la fente 7 présente une forme complémentaire à celle de la tête 61 ou du pied 62 de la masselotte 6, 6'. Ce mode de réalisation est particulièrement avantageux car il permet de limiter l'épaisseur du balancier 1 une fois les masselottes 6,6' montées sur le balancier 1.Advantageously, slot 7 has a shape complementary to that of head 61 or foot 62 of flyweight 6, 6'. This embodiment is particularly advantageous because it makes it possible to limit the thickness of the balance 1 once the flyweights 6,6' have been mounted on the balance 1.

Lors de la mise en place des masselottes 6,6' dans les fentes 7, les masselottes 6,6' sont pincées dans les fentes 7 et sont maintenues par friction dans leur position sous l'effet de l'élasticité du bras élastique 5.When the flyweights 6,6' are placed in the slots 7, the flyweights 6,6' are pinched in the slots 7 and are held by friction in their position under the effect of the elasticity of the elastic arm 5.

Les masselottes 6,6' de réglage sont munies d'une fente 63 pour régler la position angulaire de la masselotte au moyen d'un outil coopérant avec le fente 63 pour transmettre un couple au tour de l'axe de rotation de la masselotte 6,6'. Selon le mode de réalisation illustré à la figure 1, chaque masselotte 6,6' présente un méplat 64 sur le disque formant la tête 61.The adjusting weights 6,6' are provided with a slot 63 to adjust the angular position of the weight by means of a tool cooperating with the slot 63 to transmit a torque around the axis of rotation of the weight 6 ,6'. According to the embodiment illustrated in figure 1 , each flyweight 6,6' has a flat 64 on the disk forming the head 61.

Bien évidemment, l'homme du métier saura adapter le balancier 1 et mettre en place tout autre type de masselotte 6,6' de manière à pouvoir régler l'inertie du balancier 1.Of course, those skilled in the art will know how to adapt the balance 1 and set up any other type of flyweight 6,6' so as to be able to adjust the inertia of the balance 1.

Une telle configuration permet donc un réglage simple et rapide du balancier, les masselottes plus grande et/ou plus lourde permettant dans un premier temps d'effectuer un réglage grossier, et les masselottes plus petites et/ou plus légères permettant dans un second temps d'affiner le réglage.Such a configuration therefore allows simple and rapid adjustment of the balance, the larger and/or heavier weights initially allowing coarse adjustment to be made, and the smaller and/or lighter weights subsequently allowing fine-tune the setting.

L'invention concerne également un mouvement horloger et une pièce d'horlogerie équipés d'un balancier conforme à l'invention.The invention also relates to a timepiece movement and a timepiece equipped with a balance according to the invention.

Grâce à ces différents aspects de l'invention, on dispose d'un balancier compact permettant de régler la position des masselottes facilement et peu couteux à fabriquer.Thanks to these various aspects of the invention, a compact balance wheel is available which makes it possible to adjust the position of the flyweights easily and inexpensively to manufacture.

Bien entendu, la présente invention ne se limite pas à l'exemple illustré et est susceptible de diverses variantes et modifications qui apparaîtront à l'homme du métier.Of course, the present invention is not limited to the example illustrated and is susceptible to various variants and modifications which will appear to those skilled in the art.

Claims (10)

Balancier (1) pour mouvement d'horlogerie, comprenant des parties rigides constituées par un moyeu (2) définissant l'axe de pivotement (A) dudit balancier (1), une serge (3), quatre bras (4) reliant ledit la serge (3) au moyeu (2), et comportant quatre fentes (7) pour la réception et le pincement en position d'une masselotte (6,6'), chaque fente (7) étant délimitée d'une part par un bras (4), et d'autre part par un bras élastique (5) comportant une première extrémité (5B) solidaire dudit bras (4), et une deuxième extrémité distale (5A) libre par rapport audit moyeu (2), audit bras (4), et par rapport à la serge (3),
caractérisé en ce que le balancier (1) comprend deux paires de masselottes (6,6'), chaque paire de masselottes (6,6') présentant des masses différentes pour assurer des pouvoirs réglants différents, une première paire de masselotte (6) permettant un réglage grossier, et une seconde paire de masselotte (6') permettant un réglage fin.Balance (1) for a clock movement, comprising rigid parts consisting of a hub (2) defining the pivot axis (A) of said balance (1), a rim (3), four arms (4) connecting said rim (3) to the hub (2), and comprising four slots (7) for receiving and clamping in position a weight (6,6'), each slot (7) being delimited on the one hand by an arm (4), and on the other hand by an elastic arm (5) comprising a first end (5B) secured to said arm (4), and a second distal end (5A) free with respect to said hub (2), to said arm ( 4), and compared to the serge (3),
characterized in that the balance (1) comprises two pairs of weights (6,6'), each pair of weights (6,6') having different masses to ensure different regulating powers, a first pair of weights (6) allowing coarse adjustment, and a second pair of flyweights (6') allowing fine adjustment. Balancier (1) selon la revendication 1, caractérisé en ce que les masselottes (6,6') de chaque paire sont disposées dans les fentes (7) en vis-à-vis par rapport à l'axe de pivotement (A) du balancier (1).Balance (1) according to Claim 1, characterized in that the flyweights (6,6') of each pair are arranged in the slots (7) facing each other with respect to the pivot axis (A) of the pendulum (1). Balancier (1) selon la revendication 1 ou 2, caractérisé en ce que chaque paire de masselottes (6,6') présente des dimensions différentes, les masselottes (6) de la première paire étant plus grandes que les masselottes (6') de la seconde paire, ou inversement.Balance (1) according to Claim 1 or 2, characterized in that each pair of weights (6,6') has different dimensions, the weights (6) of the first pair being larger than the weights (6') of the second pair, or vice versa. Balancier (1) selon l'une des revendications 1 à 3, caractérisé en ce que les masselottes (6) de la première paire sont plus lourdes que les masselottes (6') de la seconde paire, ou inversement.Balance (1) according to one of Claims 1 to 3, characterized in that the flyweights (6) of the first pair are heavier than the flyweights (6') of the second pair, or vice versa. Balancier (1) selon l'une des revendications 1 à 4, caractérisé en ce que les paires de masselottes (6,6') sont réalisé en un matériau différent.Balance (1) according to one of Claims 1 to 4, characterized in that the pairs of weights (6,6') are made of a different material. Balancier (1) selon l'une des revendications 1 à 5, caractérisé en ce que les masselottes (6) de la première paire et les masselottes (6') de la seconde paire sont disposées sur un rayon distinct du balancier.Balance (1) according to one of Claims 1 to 5, characterized in that the flyweights (6) of the first pair and the flyweights (6') of the second pair are arranged on a distinct radius of the balance. Balancier (1) selon la revendication 6, caractérisé en ce que les masselottes (6) de la première paire sont disposées sur un premier rayon à proximité de la serge (3) et les masselottes (6') de la seconde paire sont disposées sur un second un rayon à proximité du moyeu (2) du balancier.Balance (1) according to Claim 6, characterized in that the weights (6) of the first pair are arranged on a first radius close to the rim (3) and the weights (6') of the second pair are arranged on a second spoke close to the hub (2) of the pendulum. Balancier (1) selon l'une quelconque des revendications 1 à 7, dans lequel les bras (2), la serge (10) et le moyeu (4) forment un élément monobloc.Pendulum (1) according to any one of Claims 1 to 7, in which the arms (2), the rim (10) and the hub (4) form a one-piece element. Mouvement d'horlogerie comprenant un balancier (1) selon l'une des revendications 1 à 8.Clockwork movement comprising a balance wheel (1) according to one of Claims 1 to 8. Pièce d'horlogerie comprenant un mouvement selon la revendication 9.Timepiece comprising a movement according to claim 9.
EP21213656.8A 2021-12-10 2021-12-10 Balance wheel with inertia adjustment Pending EP4194964A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP21213656.8A EP4194964A1 (en) 2021-12-10 2021-12-10 Balance wheel with inertia adjustment
US17/815,392 US20230185241A1 (en) 2021-12-10 2022-07-27 Balance with inertia adjustment
JP2022132985A JP2023086663A (en) 2021-12-10 2022-08-24 Balance with inertia adjustment function
CN202211074838.6A CN116256960A (en) 2021-12-10 2022-09-02 Balance wheel with inertia adjustment

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EP21213656.8A EP4194964A1 (en) 2021-12-10 2021-12-10 Balance wheel with inertia adjustment

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EP (1) EP4194964A1 (en)
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH264669A (en) 1947-10-30 1949-10-31 Ernest Borel & Cie S A Balance with adjusting screws for watch movements and other timepieces.
US20030179655A1 (en) * 2002-03-21 2003-09-25 Chopard Manufacture S.A. Balance wheel provided with an adjustment device
EP1837719B1 (en) 2006-03-24 2009-06-03 Nivarox-FAR S.A. Balance for a clock movement
CH705238A2 (en) * 2011-07-15 2013-01-15 Nivarox Sa Balance for clock movement of watch, has elastic arm comprising distal end free with respect to hub, arm and felloe sector, and permanently biased toward rigid part of balance delimiting slot
EP3839655A1 (en) * 2019-12-18 2021-06-23 Nivarox-FAR S.A. Horological balance

Family Cites Families (3)

* Cited by examiner, † Cited by third party
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
JP6070937B2 (en) * 2013-02-20 2017-02-01 セイコーインスツル株式会社 Balance, movement for watch and mechanical watch
EP2990883A1 (en) * 2014-08-29 2016-03-02 Nivarox-FAR S.A. Clockwork balance wheel-hairspring assembly

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH264669A (en) 1947-10-30 1949-10-31 Ernest Borel & Cie S A Balance with adjusting screws for watch movements and other timepieces.
US20030179655A1 (en) * 2002-03-21 2003-09-25 Chopard Manufacture S.A. Balance wheel provided with an adjustment device
EP1837719B1 (en) 2006-03-24 2009-06-03 Nivarox-FAR S.A. Balance for a clock movement
CH705238A2 (en) * 2011-07-15 2013-01-15 Nivarox Sa Balance for clock movement of watch, has elastic arm comprising distal end free with respect to hub, arm and felloe sector, and permanently biased toward rigid part of balance delimiting slot
EP3839655A1 (en) * 2019-12-18 2021-06-23 Nivarox-FAR S.A. Horological balance

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CN116256960A (en) 2023-06-13
JP2023086663A (en) 2023-06-22

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