EP2791737B1 - Overmoulded timepiece barrel - Google Patents

Overmoulded timepiece barrel Download PDF

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Publication number
EP2791737B1
EP2791737B1 EP12791757.3A EP12791757A EP2791737B1 EP 2791737 B1 EP2791737 B1 EP 2791737B1 EP 12791757 A EP12791757 A EP 12791757A EP 2791737 B1 EP2791737 B1 EP 2791737B1
Authority
EP
European Patent Office
Prior art keywords
assembly
timepiece
balance
plastic material
pallet
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.)
Active
Application number
EP12791757.3A
Other languages
German (de)
French (fr)
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EP2791737A1 (en
Inventor
Ivan Villar
Xavier Tinguely
Florent Strahm
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.)
ETA SA Manufacture Horlogere Suisse
Original Assignee
ETA SA Manufacture Horlogere Suisse
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.)
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Publication date
Application filed by ETA SA Manufacture Horlogere Suisse filed Critical ETA SA Manufacture Horlogere Suisse
Priority to EP12791757.3A priority Critical patent/EP2791737B1/en
Publication of EP2791737A1 publication Critical patent/EP2791737A1/en
Application granted granted Critical
Publication of EP2791737B1 publication Critical patent/EP2791737B1/en
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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
    • G04B13/00—Gearwork
    • G04B13/02—Wheels; Pinions; Spindles; Pivots
    • 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
    • G04B15/00—Escapements
    • G04B15/14—Component parts or constructional details, e.g. construction of the lever or the escape wheel
    • 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
    • G04B15/00—Escapements
    • G04B15/06—Free escapements
    • 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
    • G04B17/22—Compensation of mechanisms for stabilising frequency for the effect of variations of temperature
    • G04B17/227—Compensation of mechanisms for stabilising frequency for the effect of variations of temperature composition and manufacture of the material used
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/32—Component parts or constructional details, e.g. collet, stud, virole or piton

Definitions

  • the invention relates to a timepiece assembly comprising at least two opposing movable members, coupled to each other and cooperating by contact with each other at peripheral contact surfaces, where each said peripheral contact surface each said mobile coupling in said set is the peripheral surface of a plastic skin.
  • the invention also relates to a watch movement comprising at least one such set.
  • the invention also relates to a timepiece comprising at least one such set.
  • the invention relates to the field of watchmaking, and more particularly that of the control assemblies comprising a balance.
  • Watchmaking mechanisms and in particular regulating assemblies, are sensitive to variations in temperature.
  • a watch pendulum generally consists of a pendulum rod connected to a balance shaft by one or more arms, a double plate which comprises, on the one hand a small plate with a notch cooperating with a dart d ' an anchor, and secondly a large plate carrying a plateau pin cooperating with a fork of the anchor.
  • the document CH 324 746 A KIENZLE discloses anchor escapements with plastic components and a metal anchor coated with plastic.
  • the document CH 609 824 A FAR describes an injected plastic anchor, combined with a wheel of the same material or metal.
  • the document FR 1 555 768 A CALOR similarly describes an electric clock whose main wheels are molded in one piece including the teeth and the axis of the gear train.
  • LEPEE describes a balance with metal axis and serge, arm, double plate and monoblock hub, in particular with over-molding of the hub on the axis.
  • the serge is metallic.
  • the ellipse is however hunted.
  • the invention proposes to improve the mechanisms of watchmaking, so as to ensure the stability of their operation and the accuracy of their operation despite temperature variations, while facilitating the manufacture and assembly of components, in particular those of the control assemblies, such as a watch clock, to rationalize its production and lower its cost.
  • the invention relates to a watch assembly comprising at least two opposing movable members, coupled to each other and cooperating by contact with each other at the level of peripheral contact surfaces, characterized in that that each said peripheral contact surface of each said mobile coupled in said set is the peripheral surface of a plastic skin.
  • said skins bearing said peripheral contact surfaces of said mobiles coupled two by two within said set are made of the same plastic material.
  • said skin bearing said peripheral contact surface of at least one of said paired opposing mobiles in said set is made by overmolding on a base core.
  • said skin bearing said peripheral contact surface of each of said pair of opposing mobile pairs in said set is made by overmoulding on a base core.
  • the invention also relates to a watch movement comprising at least one such set.
  • the invention also relates to a timepiece comprising at least one such set.
  • the invention relates to the field of watchmaking, and is more particularly illustrated for the field of control assemblies comprising a balance.
  • the invention relates to a timepiece assembly 30 comprising at least two opposing movable members 20A, 20B, coupled to each other and cooperating by contact with each other at peripheral contact surfaces 200, respectively 200A, 200B, as visible on the figure 1 .
  • each peripheral contact surface 200 of each mobile 20 coupled in such an assembly 30 is the peripheral surface of a plastic skin 210.
  • the plastic material used for overmolding this skin 210 is a material with a low coefficient of friction of less than 0.15, and preferably between 0.07 and 0.15, chosen to create a minimal friction torque with a antagonistic component.
  • the skins 210 bearing the peripheral contact surfaces 200 of the mobiles 20 coupled in pairs within the same assembly 30 are made of the same plastic material.
  • the skin 210 carrying the peripheral contact surface 200 of at least one of two paired opposing moters within such an assembly 30 is made by overmolding on a base core 250.
  • the skin 210 carrying the peripheral contact surface 200 of each of the pair of paired opposing mobiles 20 within such an assembly 30 is made by overmoulding on a base core 250.
  • At least one such skin 210 is overmolded on a base core 250 made of a thermally neutral material or silicon, or silicon oxide, or quartz, or the like.
  • the radial section of peripheral plastic material of the skins 210 of these two mobiles 20 is equal.
  • the figures 2 and 3 illustrate another case, where the cooperation between the mobiles 20 is in a plane perpendicular to the two parallel pivoting axes DA, DB, of the two mobiles 20 of the same assembly 30.
  • the invention relates to escapement mechanism mobiles.
  • a first mobile 20 is a watch wheel 1 overmolded on a balance shaft 2.
  • this overmolded pendulum 1 comprises a small plate 4 and a plateau pin 5 of plastic material overmolded together on the shaft 2.
  • the shaft 2 comprises a stiffening flange 6 on which is molded the small plate 4.
  • the flange 6 is, or a separate component threaded onto the shaft 2, and preferably immobilized on it by driving, gluing, welding, soldering, or other suitable method, or a protruding shoulder constituting the shaft 2.
  • the flange 6 constitutes a bearing surface for a serge 7 driven on the shaft 2.
  • the flange 6 constitutes a support frame for a serge 7 overmolded on the shaft 2.
  • the balance 1 can be made according to a variant in which it comprises a serge 7 overmoulded, together with the small plate 4 and with the plate pin 5, on the shaft 2 and on the flange 6.
  • the overmolding can be conducted in several steps.
  • the plate pin 5 is projecting radially with respect to a body 8 extending the small plate 4 in the axial direction of the rocker 1.
  • the small plate 4 is cylindrical and has a peripheral plate notch 9.
  • the body 8 is also cylindrical, of the same diameter as the small plate 4, and the plate pin 5 is carried by a radial arm relative to the body 8 and aligned with the plate notch 9.
  • the small plate 4 and the plate pin 5 are dimensioned so that the main axis of inertia of the set that they constitute one with the other is confounded with the axis D of the pendulum 1.
  • the balance shaft 2 comprises substantially radial fins 11 for fastening the overmoulding plastic, and these fins 11 are balanced with respect to the axis D of the balance 1.
  • the plastic material used for overmolding the small plate 4 and the plate pin 5 is a material with a low coefficient of friction of less than 0.15, and preferably between 0.07 and 0.15, chosen for create a minimal friction torque with an anchor with which the pendulum cooperates, depending on the material of the anchor.
  • the figure 3 illustrates an anchor-pendulum assembly 31 comprising a rocker 1, and an anchor 21.
  • the figure 3 illustrates another anchor-escape wheel assembly 32 comprising such an anchor 21 and another mobile 20 which is an escape wheel 25, having teeth 26 cooperating with the pallets 23 of the anchor 21.
  • the assembly 30, balance anchor 31 or anchor-escapement wheel 32 is arranged so that the mechanism is thermo-compensated, that is to say that the the expansion gap is such that, at the point of interface contact between the 200 peripheral peripheral contact surfaces (horn 22-pin 5 for the rocker arm assembly 31, tooth 26-paddle 23 for the anchor-wheel assembly escapement 32), the relative expansions of the two opposing mobiles do not cause any differential displacement of this interface point.
  • necking or superficial swellings do not induce stray play in the operation.
  • the overmolded composite fabrication of at least one of the two mobiles 20 of each assembly 30 makes it possible to limit the peripheral amount of overmolding plastics material, so as to have a plastic expansion or contraction equivalent to that of the counterpart.
  • the core or the base body 250 on which the overmolding of the skin 210 of each mobile 20 is made is designed to have a radial expansion, relative to its pivot axis, equivalent to that of the core or base body 250 on which is the overmolding of the skin 210 of the antagonist mobile.
  • the production of such cores or base bodies 250 in relatively thermally inert materials, especially materials derived from micro-technologies, silicon or the like, is advantageous in this respect.
  • the peripheral overmolding makes it possible to give the contact zones 200 such mobiles 20 tribological properties different from those of the cores or base body 250.
  • the small plate 4 is preferably overmolded only at the radial periphery of the stiffening flange 6.
  • the core 27, made for example in the form of an intermediate washer or a star, makes it possible to limit the quantity of plastic material overmolded on the periphery 28 of the escape wheel 25, so as to have an expansion of plastic material equivalent to that of the anchor 21 at its pallets 23. This provides a thermo-compensated system between the teeth 26 and the pallets 23 of the anchor 21.
  • thermo-compensated system between the peg 5 and the horns 22 of the anchor 21.
  • the same material is used for overmolding (or the complete manufacture) of each mobile 20 of such an assembly 30, so as to provide this heat compensation without other artifice.
  • An assembly 30 with more than two mobiles 20 is constituted, in the present example, by the is realized by the combination of sets anchor-balance 31, anchor-escape wheel 32 around the same anchor 21 on both sides of which interact the balance 1 and the escape wheel 25, each made according to the characteristics described above.
  • the invention also relates to a clock setting assembly 10 comprising at least one such assembly 30, and in particular comprising such an overmolded balance 1.
  • the invention also relates to a watchmaking movement 100 comprising at least one clocking watch assembly 10 or at least one such assembly 30.
  • the invention also relates to a timepiece 1000 comprising at least one such clock regulation assembly 10 or at least one such assembly 30.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Metallurgy (AREA)
  • Manufacturing & Machinery (AREA)
  • Electromechanical Clocks (AREA)
  • Micromachines (AREA)
  • Gears, Cams (AREA)

Description

Domaine de l'inventionField of the invention

L'invention concerne un ensemble d'horlogerie comportant au moins deux mobiles antagonistes, couplĆ©s l'un Ć  l'autre et coopĆ©rant par contact l'un avec l'autre au niveau de surfaces pĆ©riphĆ©riques de contact, oĆ¹ chaque dite surface pĆ©riphĆ©rique de contact de chaque dit mobile couplĆ© dans ledit ensemble est la surface pĆ©riphĆ©rique d'une peau en matiĆØre plastique.The invention relates to a timepiece assembly comprising at least two opposing movable members, coupled to each other and cooperating by contact with each other at peripheral contact surfaces, where each said peripheral contact surface each said mobile coupling in said set is the peripheral surface of a plastic skin.

L'invention concerne encore un mouvement d'horlogerie comportant au moins un tel ensemble.The invention also relates to a watch movement comprising at least one such set.

L'invention concerne encore une piĆØce d'horlogerie comportant au moins un tel ensemble.The invention also relates to a timepiece comprising at least one such set.

L'invention concerne le domaine de l'horlogerie, et plus particuliĆØrement celui des ensembles rĆ©glants comportant un balancier.The invention relates to the field of watchmaking, and more particularly that of the control assemblies comprising a balance.

ArriĆØre-plan de l'inventionBackground of the invention

Les mƩcanismes d'horlogerie, et en particulier les ensembles rƩglants, sont sensibles aux variations de tempƩrature.Watchmaking mechanisms, and in particular regulating assemblies, are sensitive to variations in temperature.

L'emploi de diffƩrents matƩriaux, souvent nƩcessaire pour des raisons tribologiques, ne facilite pas la situation.The use of different materials, often necessary for tribological reasons, does not facilitate the situation.

Un balancier d'horlogerie est gƩnƩralement constituƩ d'une serge de balancier reliƩe Ơ un arbre de balancier par un ou plusieurs bras, d'un plateau double qui comporte, d'une part un petit plateau avec une encoche coopƩrant avec un dard d'une ancre, et d'autre part un grand plateau porteur d'une cheville de plateau coopƩrant avec une fourchette de l'ancre. Ces diffƩrents composants sont fabriquƩs indƩpendamment, puis assemblƩs, ce qui est coƻteux.A watch pendulum generally consists of a pendulum rod connected to a balance shaft by one or more arms, a double plate which comprises, on the one hand a small plate with a notch cooperating with a dart d ' an anchor, and secondly a large plate carrying a plateau pin cooperating with a fork of the anchor. These different components are manufactured independently, then assembled, which is expensive.

Le document CH 324 746 A KIENZLE divulgue des Ć©chappements Ć  ancre avec composants en matiĆØre plastique, ainsi qu'une ancre mĆ©tallique revĆŖtue de matiĆØre plastique.The document CH 324 746 A KIENZLE discloses anchor escapements with plastic components and a metal anchor coated with plastic.

Le document US 3 425 212 A VERDE, GENERAL TIME CO dĆ©crit une roue d'Ć©chappement en matiĆØre plastique, une ancre en matiĆØre plastique monobloc avec palettes, cornes et dard, et un balancier en matiĆØre plastique avec serge, ellipse et plateau, montĆ© sur un arbre mĆ©talliqueThe document US 3,425,212 A VERDE, GENERAL TIME CO describes a plastic escapement wheel, a monoblock plastic anchor with pallets, horns and dart, and a plastic balance with serge, ellipse and plate, mounted on a metal shaft

Le document CH 609 824 A FAR dĆ©crit une ancre en matiĆØre plastique injectĆ©e, combinĆ©e Ć  une roue de mĆŖme matiĆØre ou en mĆ©tal.The document CH 609 824 A FAR describes an injected plastic anchor, combined with a wheel of the same material or metal.

Le document CH 342 897 A HUGUENIN divulgue des palettes ou une roue d'Ć©chappement en Ā« TeflonĀ® Ā».The document CH 342 897 AT HUGUENIN discloses pallets or a "TeflonĀ®" escape wheel.

Le document DE 16 98 617 B1 LICENTIA dĆ©crit un mĆ©canisme de pendule Ć©lectrique entiĆØrement en matiĆØre plastique.The document DE 16 98 617 B1 LICENTIA describes an electric pendulum mechanism made entirely of plastic.

Le document FR 1 555 768 A CALOR dĆ©crit de mĆŖme une pendulette Ć©lectrique dont les principaux rouages sont moulĆ©s en une seule piĆØce comprenant la denture et l'axe du rouage.The document FR 1 555 768 A CALOR similarly describes an electric clock whose main wheels are molded in one piece including the teeth and the axis of the gear train.

Le document FR 2 050 375 A1 , LEPEE dƩcrit un balancier avec axe mƩtallique et serge, bras, double plateau et moyeu monobloc, notamment avec surmoulage du moyeu sur l'axe. Dans une variante la serge est mƩtallique. L'ellipse est par contre chassƩe.The document FR 2 050 375 A1 , LEPEE describes a balance with metal axis and serge, arm, double plate and monoblock hub, in particular with over-molding of the hub on the axis. In a variant, the serge is metallic. The ellipse is however hunted.

Le document US 3 678 683 A , CIELASZYK, GENERAL TIME CO dĆ©crit un double plateau de balancier en matiĆØre plastique monobloc avec l'ellipse, qui est saillante radialement.The document US 3,678,683 A , CIELASZYK, GENERAL TIME CO describes a double balance plate in one-piece plastic with the ellipse, which is projecting radially.

RƩsumƩ de l'inventionSummary of the invention

L'invention se propose de perfectionner les mƩcanismes horlogers, de faƧon Ơ assurer la stabilitƩ de leur fonctionnement et la prƩcision de leur marche malgrƩ les variations de tempƩrature, tout en facilitant la fabrication et l'assemblage des composants, notamment ceux des ensembles rƩglants, tel un balancier d'horlogerie, pour rationaliser sa production et abaisser son coƻt.The invention proposes to improve the mechanisms of watchmaking, so as to ensure the stability of their operation and the accuracy of their operation despite temperature variations, while facilitating the manufacture and assembly of components, in particular those of the control assemblies, such as a watch clock, to rationalize its production and lower its cost.

A cet effet, l'invention concerne un ensemble d'horlogerie comportant au moins deux mobiles antagonistes, couplĆ©s l'un Ć  l'autre et coopĆ©rant par contact l'un avec l'autre au niveau de surfaces pĆ©riphĆ©riques de contact, caractĆ©risĆ© en ce que chaque dite surface pĆ©riphĆ©rique de contact de chaque dit mobile couplĆ© dans ledit ensemble est la surface pĆ©riphĆ©rique d'une peau en matiĆØre plastique.For this purpose, the invention relates to a watch assembly comprising at least two opposing movable members, coupled to each other and cooperating by contact with each other at the level of peripheral contact surfaces, characterized in that that each said peripheral contact surface of each said mobile coupled in said set is the peripheral surface of a plastic skin.

Selon une caractĆ©ristique de l'invention lesdites peaux portant lesdites surfaces pĆ©riphĆ©riques de contact desdits mobiles couplĆ©s deux Ć  deux au sein dudit ensemble sont rĆ©alisĆ©es dans la mĆŖme matiĆØre plastique.According to one characteristic of the invention said skins bearing said peripheral contact surfaces of said mobiles coupled two by two within said set are made of the same plastic material.

Selon une caractƩristique de l'invention ladite peau portant ladite surface pƩriphƩrique de contact d'au moins un de deux dits mobiles antagonistes appairƩs au sein dudit ensemble est rƩalisƩe en surmoulage sur un noyau de base.According to a characteristic of the invention, said skin bearing said peripheral contact surface of at least one of said paired opposing mobiles in said set is made by overmolding on a base core.

Selon une caractƩristique de l'invention ladite peau portant ladite surface pƩriphƩrique de contact de chacun des deux dits mobiles antagonistes appairƩs au sein dudit ensemble est rƩalisƩe en surmoulage sur un noyau de base.According to a feature of the invention, said skin bearing said peripheral contact surface of each of said pair of opposing mobile pairs in said set is made by overmoulding on a base core.

L'invention concerne encore un mouvement d'horlogerie comportant au moins un tel ensemble.The invention also relates to a watch movement comprising at least one such set.

L'invention concerne encore une piĆØce d'horlogerie comportant au moins un tel ensemble.The invention also relates to a timepiece comprising at least one such set.

Description sommaire des dessinsBrief description of the drawings

D'autres caractĆ©ristiques et avantages de l'invention apparaĆ®tront Ć  la lecture de la description dĆ©taillĆ©e qui va suivre, en rĆ©fĆ©rence aux figures annexĆ©es oĆ¹ :

  • la figure 1 reprĆ©sente, en vue de dessus, un ensemble d'horlogerie selon l'invention, comportant deux mobiles antagonistes en coopĆ©ration l'un avec l'autre ;
  • la figure 2 reprĆ©sente, en vue de dessus, un ensemble ancre-balancier d'horlogerie selon l'invention, comportant un balancier et une ancre ;
  • la figure 3 reprĆ©sente, en vue de dessus, un ensemble ancre-roue d'Ć©chappement d'horlogerie selon l'invention, comportant l'ancre de la figure 2 et une roue d'Ć©chappement;
  • la figure 4 reprĆ©sente, de faƧon schĆ©matisĆ©e, en perspective et en transparence, une application de l'invention au balancier de la figure 2;
  • la figure 5 est un schĆ©ma-blocs d'une piĆØce d'horlogerie comportant un mouvement compo qui inclut un ensemble rĆ©glant avec un ensemble selon l'invention.
Other characteristics and advantages of the invention will appear on reading the detailed description which follows, with reference to the appended figures in which:
  • the figure 1 represents, in top view, a watch assembly according to the invention, comprising two opposing mobiles in cooperation with each other;
  • the figure 2 represents, in top view, an anchor-pendulum clock assembly according to the invention, comprising a balance and an anchor;
  • the figure 3 represents, in plan view, an anchor-wheel assembly for a clock escapement according to the invention, comprising the anchor of the figure 2 and an escape wheel;
  • the figure 4 represents, schematically, in perspective and in transparency, an application of the invention to the pendulum of the figure 2 ;
  • the figure 5 is a block diagram of a timepiece comprising a compo movement which includes a regulating assembly with an assembly according to the invention.

Description dƩtaillƩe des modes de rƩalisation prƩfƩrƩsDetailed Description of the Preferred Embodiments

L'invention concerne le domaine de l'horlogerie, et est plus particuliĆØrement illustrĆ©e pour le domaine des ensembles rĆ©glants comportant un balancier.The invention relates to the field of watchmaking, and is more particularly illustrated for the field of control assemblies comprising a balance.

L'invention concerne un ensemble d'horlogerie 30 comportant au moins deux mobiles 20 antagonistes 20A, 20B, couplƩs l'un Ơ l'autre et coopƩrant par contact l'un avec l'autre au niveau de surfaces pƩriphƩriques de contact 200, respectivement 200A, 200B, tel que visible sur la figure 1.The invention relates to a timepiece assembly 30 comprising at least two opposing movable members 20A, 20B, coupled to each other and cooperating by contact with each other at peripheral contact surfaces 200, respectively 200A, 200B, as visible on the figure 1 .

Selon l'invention, chaque surface pĆ©riphĆ©rique de contact 200 de chaque mobile 20 couplĆ© dans un tel ensemble 30 est la surface pĆ©riphĆ©rique d'une peau 210 en matiĆØre plastique.According to the invention, each peripheral contact surface 200 of each mobile 20 coupled in such an assembly 30 is the peripheral surface of a plastic skin 210.

De prĆ©fĆ©rence, la matiĆØre plastique utilisĆ©e pour le surmoulage cette peau 210 est une matiĆØre Ć  faible coefficient de frottement infĆ©rieur Ć  0,15, et de prĆ©fĆ©rence compris entre 0,07 et 0,15, choisie pour crĆ©er un couple de frottement minimal avec un composant antagoniste.Preferably, the plastic material used for overmolding this skin 210 is a material with a low coefficient of friction of less than 0.15, and preferably between 0.07 and 0.15, chosen to create a minimal friction torque with a antagonistic component.

Dans une variante prĆ©fĆ©rĆ©e, les peaux 210 portant les surfaces pĆ©riphĆ©riques de contact 200 des mobiles 20 couplĆ©s deux Ć  deux au sein d'un mĆŖme ensemble 30 sont rĆ©alisĆ©es dans la mĆŖme matiĆØre plastique.In a preferred embodiment, the skins 210 bearing the peripheral contact surfaces 200 of the mobiles 20 coupled in pairs within the same assembly 30 are made of the same plastic material.

Dans une variante prƩfƩrƩe, la peau 210 portant la surface pƩriphƩrique de contact 200 d'au moins un de deux mobiles 20 antagonistes appairƩs au sein d'un tel ensemble 30 est rƩalisƩe en surmoulage sur un noyau de base 250.In a preferred variant, the skin 210 carrying the peripheral contact surface 200 of at least one of two paired opposing moters within such an assembly 30 is made by overmolding on a base core 250.

Dans une variante particuliĆØre, la peau 210 portant la surface pĆ©riphĆ©rique de contact 200 de chacun des deux mobiles 20 antagonistes appairĆ©s au sein d'un tel ensemble 30 est rĆ©alisĆ©e en surmoulage sur un noyau de base 250.In a particular variant, the skin 210 carrying the peripheral contact surface 200 of each of the pair of paired opposing mobiles 20 within such an assembly 30 is made by overmoulding on a base core 250.

Avantageusement, au moins une telle peau 210 est surmoulƩe sur un noyau de base 250 rƩalisƩ dans un matƩriau thermiquement neutre ou en silicium, ou oxyde de silicium, ou en quartz, ou similaire.Advantageously, at least one such skin 210 is overmolded on a base core 250 made of a thermally neutral material or silicon, or silicon oxide, or quartz, or the like.

Avantageusement, dans le cas de surfaces de contact 200 se dĆ©veloppant parallĆØlement Ć  l'axe de pivotement de deux mobiles 20A et 20B pivotant autour d'axes parallĆØles DA et DB, la section radiale de matiĆØre plastique pĆ©riphĆ©rique des peaux 210 de ces deux mobiles 20 est Ć©gale.Advantageously, in the case of contact surfaces 200 developing parallel to the pivot axis of two mobiles 20A and 20B pivoting about parallel axes DA and DB, the radial section of peripheral plastic material of the skins 210 of these two mobiles 20 is equal.

Les figures 2 et 3 illustrent un autre cas de figure, oĆ¹ la coopĆ©ration entre les mobiles 20 se fait dans un plan perpendiculaire aux deux axes de pivotement parallĆØles DA, DB, des deux mobiles 20 d'un mĆŖme ensemble 30. Dans ce cas il est prĆ©fĆ©rable d'Ć©quilibrer les sections de matiĆØre plastique pĆ©riphĆ©rique, mesurĆ©es dans un plan perpendiculaire au point de contact et parallĆØle aux axes de pivotement de ces deux mobiles 20.The figures 2 and 3 illustrate another case, where the cooperation between the mobiles 20 is in a plane perpendicular to the two parallel pivoting axes DA, DB, of the two mobiles 20 of the same assembly 30. In this case it is preferable to balance the sections of peripheral plastic material, measured in a plane perpendicular to the point of contact and parallel to the pivot axes of these two mobiles 20.

L'invention concerne en particulier des mobiles 20 de mƩcanisme d'Ʃchappement.In particular, the invention relates to escapement mechanism mobiles.

Dans une rĆ©alisation particuliĆØre illustrĆ©e sur les figures 2 et 4, un premier mobile 20 est un balancier d'horlogerie 1 surmoulĆ© sur un arbre de balancier 2.In a particular embodiment illustrated on the figures 2 and 4 , a first mobile 20 is a watch wheel 1 overmolded on a balance shaft 2.

Selon l'invention, ce balancier 1 surmoulĆ© comporte un petit plateau 4 et une cheville de plateau 5 en matiĆØre plastique surmoulĆ©s ensemble sur l'arbre 2.According to the invention, this overmolded pendulum 1 comprises a small plate 4 and a plateau pin 5 of plastic material overmolded together on the shaft 2.

De faƧon avantageuse, l'arbre 2 comporte un flasque de rigidification 6 sur lequel est surmoulƩ le petit plateau 4. DiffƩrents modes de rƩalisation sont possibles : le flasque 6 est, ou bien un composant sƩparƩ enfilƩ sur l'arbre 2, et de prƩfƩrence immobilisƩ sur celui-ci par chassage, collage, soudage, brasage, ou autre procƩdƩ convenable, ou bien un Ʃpaulement saillant constitutif de l'arbre 2.Advantageously, the shaft 2 comprises a stiffening flange 6 on which is molded the small plate 4. Various embodiments are possible: the flange 6 is, or a separate component threaded onto the shaft 2, and preferably immobilized on it by driving, gluing, welding, soldering, or other suitable method, or a protruding shoulder constituting the shaft 2.

Dans un premier mode de rƩalisation, le flasque 6 constitue une surface d'appui pour une serge 7 chassƩe sur l'arbre 2.In a first embodiment, the flange 6 constitutes a bearing surface for a serge 7 driven on the shaft 2.

Dans un deuxiĆØme mode de rĆ©alisation, le flasque 6 constitue une armature d'appui pour une serge 7 surmoulĆ©e sur l'arbre 2. Dans ce deuxiĆØme mode, le balancier 1 peut ĆŖtre rĆ©alisĆ© selon une variante dans laquelle il comporte une serge 7 surmoulĆ©e, ensemble avec le petit plateau 4 et avec la cheville de plateau 5, sur l'arbre 2 et sur le flasque 6. Dans d'autres variantes, le surmoulage peut ĆŖtre conduit en plusieurs Ć©tapes.In a second embodiment, the flange 6 constitutes a support frame for a serge 7 overmolded on the shaft 2. In this second mode, the balance 1 can be made according to a variant in which it comprises a serge 7 overmoulded, together with the small plate 4 and with the plate pin 5, on the shaft 2 and on the flange 6. In other variants, the overmolding can be conducted in several steps.

De faƧon avantageuse, la cheville de plateau 5 est saillante radialement par rapport Ơ un corps 8 prolongeant le petit plateau 4 selon la direction axiale du balancier 1.Advantageously, the plate pin 5 is projecting radially with respect to a body 8 extending the small plate 4 in the axial direction of the rocker 1.

De prĆ©fĆ©rence, le petit plateau 4 est cylindrique et comporte une encoche de plateau 9 pĆ©riphĆ©rique. Avantageusement, le corps 8 est Ć©galement cylindrique, de mĆŖme diamĆØtre que le petit plateau 4, et la cheville de plateau 5 est portĆ©e par un bras radial par rapport au corps 8 et alignĆ© sur l'encoche de plateau 9.Preferably, the small plate 4 is cylindrical and has a peripheral plate notch 9. Advantageously, the body 8 is also cylindrical, of the same diameter as the small plate 4, and the plate pin 5 is carried by a radial arm relative to the body 8 and aligned with the plate notch 9.

Dans cette version prĆ©fĆ©rĆ©e oĆ¹ le petit plateau 4 comporte une encoche de plateau 9 pĆ©riphĆ©rique alignĆ©e radialement sur la cheville de plateau 5, le petit plateau 4 et la cheville de plateau 5 sont dimensionnĆ©s de faƧon Ć  ce que l'axe principal d'inertie de l'ensemble qu'ils constituent l'un avec l'autre soit confondu avec l'axe D du balancier 1.In this preferred version where the small plate 4 has a peripheral plate notch 9 aligned radially on the plate pin 5, the small plate 4 and the plate pin 5 are dimensioned so that the main axis of inertia of the set that they constitute one with the other is confounded with the axis D of the pendulum 1.

Avantageusement, l'arbre de balancier 2 comporte des ailettes 11 sensiblement radiales pour l'accrochage de la matiĆØre plastique de surmoulage, et ces ailettes 11 sont Ć©quilibrĆ©es par rapport Ć  l'axe D du balancier 1.Advantageously, the balance shaft 2 comprises substantially radial fins 11 for fastening the overmoulding plastic, and these fins 11 are balanced with respect to the axis D of the balance 1.

De prĆ©fĆ©rence, la matiĆØre plastique utilisĆ©e pour le surmoulage du petit plateau 4 et de la cheville de plateau 5 est une matiĆØre Ć  faible coefficient de frottement infĆ©rieur Ć  0,15, et de prĆ©fĆ©rence compris entre 0,07 et 0,15, choisie pour crĆ©er un couple de frottement minimal avec une ancre avec laquelle coopĆØre le balancier, en fonction du matĆ©riau de l'ancre.Preferably, the plastic material used for overmolding the small plate 4 and the plate pin 5 is a material with a low coefficient of friction of less than 0.15, and preferably between 0.07 and 0.15, chosen for create a minimal friction torque with an anchor with which the pendulum cooperates, depending on the material of the anchor.

La figure 3 illustre un ensemble ancre-balancier 31 comportant un balancier 1, et une ancre 21.The figure 3 illustrates an anchor-pendulum assembly 31 comprising a rocker 1, and an anchor 21.

Tel que visible sur les figures 2 et 3, un autre mobile 20 est ainsi une ancre 21, qui comporte des cornes 22 coopĆ©rant avec la cheville de plateau 5, un dard 24 coopĆ©rant avec l'encoche de plateau 9, et des palettes 23 agencĆ©es pour coopĆ©rer avec une roue d'Ć©chappement 25. Cette ancre 21 est rĆ©alisĆ©e au moins partiellement en matiĆØre plastique :

  • soit elle est rĆ©alisĆ©e entiĆØrement en matiĆØre plastique,
  • soit, de faƧon prĆ©fĆ©rĆ©e comme on le verra plus loin, elle comporte, au moins au niveau de ses zones de coopĆ©ration avec le balancier 1 (cornes 22) et la roue d'Ć©chappement 25 (palettes 23), une peau 210 surmoulĆ©e en matiĆØre plastique sur un noyau 250 rĆ©alisĆ© dans un autre matĆ©riau, par exemple Ć©tampĆ©, ou issu de fonderie, ou en silicium, ou oxyde de silicium, ou quartz, ou similaire.
As visible on the figures 2 and 3 another mobile 20 is thus an anchor 21, which comprises horns 22 cooperating with the plate pin 5, a dart 24 cooperating with the plate notch 9, and vanes 23 arranged to cooperate with an escape wheel 25 This anchor 21 is made at least partially of plastic material:
  • either it is made entirely of plastic material,
  • either, preferably as will be seen later, it comprises, at least at its cooperation areas with the balance 1 (horns 22) and the escape wheel 25 (pallets 23), a skin 210 overmolded material plastic on a core 250 made of another material, for example stamped, or derived from foundry, or silicon, or silicon oxide, or quartz, or the like.

La figure 3 illustre un autre ensemble ancre-roue d'Ʃchappement 32 comportant une telle ancre 21 et un autre mobile 20 qui est une roue d'Ʃchappement 25, comportant des dents 26 coopƩrant avec les palettes 23 de l'ancre 21.The figure 3 illustrates another anchor-escape wheel assembly 32 comprising such an anchor 21 and another mobile 20 which is an escape wheel 25, having teeth 26 cooperating with the pallets 23 of the anchor 21.

Cette roue d'Ć©chappement 25 est rĆ©alisĆ©e au moins partiellement en matiĆØre plastique :

  • soit elle est rĆ©alisĆ©e entiĆØrement en matiĆØre plastique,
  • soit, de faƧon prĆ©fĆ©rĆ©e comme on le verra plus loin, elle comporte, au moins au niveau de ses zones de coopĆ©ration avec l'ancre 21 constituĆ©es par les dents 26, une peau 210 de surmoulage 28 en matiĆØre plastique sur un noyau 27 rĆ©alisĆ© dans un autre matĆ©riau, par exemple Ć©tampĆ©, ou issu de fonderie, ou en silicium, ou oxyde de silicium, ou quartz, ou similaire.
This escape wheel 25 is made at least partially of plastic material:
  • either it is made entirely of plastic material,
  • either, preferably, as will be seen below, it comprises, at least at its zones of cooperation with the anchor 21 constituted by the teeth 26, a skin 210 of over-molding 28 of plastic material on a core 27 made in another material, for example stamped, or derived from foundry, or silicon, or silicon oxide, or quartz, or the like.

Dans un cas comme dans l'autre, l'ensemble 30, ancre-balancier 31 ou ancre-roue d'Ʃchappement 32, est agencƩ de faƧon Ơ ce que le mƩcanisme soit thermo-compensƩ, c'est-Ơ-dire que le jeu des dilatations soit tel que, au point de contact d'interface entre les surfaces pƩriphƩriques de contact 200 antagonistes (corne 22- cheville 5 pour l'ensemble ancre-balancier 31, dent 26-palette 23 pour l'ensemble ancre-roue d'Ʃchappement 32), les dilatations relatives des deux mobiles antagonistes n'entraƮnent aucun dƩplacement diffƩrentiel de ce point d'interface. Ainsi, les rƩtreints ou les gonflements superficiels n'induisent pas de jeux parasites dans le fonctionnement.In one case as in the other, the assembly 30, balance anchor 31 or anchor-escapement wheel 32, is arranged so that the mechanism is thermo-compensated, that is to say that the the expansion gap is such that, at the point of interface contact between the 200 peripheral peripheral contact surfaces (horn 22-pin 5 for the rocker arm assembly 31, tooth 26-paddle 23 for the anchor-wheel assembly escapement 32), the relative expansions of the two opposing mobiles do not cause any differential displacement of this interface point. Thus, necking or superficial swellings do not induce stray play in the operation.

La fabrication composite surmoulĆ©e d'au moins un des deux mobiles 20 de chaque ensemble 30 permet de limiter la quantitĆ© pĆ©riphĆ©rique de matiĆØre plastique de surmoulage, de faƧon Ć  avoir une dilatation ou une contraction de plastique Ć©quivalente Ć  celle de la piĆØce antagoniste. Naturellement, de faƧon optimale, dans une paire de mobiles 20 antagonistes d'un mĆŖme ensemble 30, le noyau ou le corps de base 250 sur lequel est rĆ©alisĆ© le surmoulage de la peau 210 de chaque mobile 20 est conƧu pour avoir une dilatation radiale, par rapport Ć  son axe de pivotement, Ć©quivalente Ć  celle du noyau ou du corps de base 250 sur lequel est rĆ©alisĆ© le surmoulage de la peau 210 du mobile 20 antagoniste. La rĆ©alisation de tels noyaux ou corps de base 250 en matĆ©riaux relativement inertes thermiquement, notamment en matĆ©riaux issus des micro-technologies, silicium ou similaire, est avantageuse Ć  ce titre. Le surmoulage pĆ©riphĆ©rique permet de donner aux zones de contact 200 de tels mobiles 20 des propriĆ©tĆ©s tribologiques diffĆ©rentes de celles des noyaux ou corps de base 250.The overmolded composite fabrication of at least one of the two mobiles 20 of each assembly 30 makes it possible to limit the peripheral amount of overmolding plastics material, so as to have a plastic expansion or contraction equivalent to that of the counterpart. Naturally, optimally, in a pair of opposing members of the same assembly 30, the core or the base body 250 on which the overmolding of the skin 210 of each mobile 20 is made is designed to have a radial expansion, relative to its pivot axis, equivalent to that of the core or base body 250 on which is the overmolding of the skin 210 of the antagonist mobile. The production of such cores or base bodies 250 in relatively thermally inert materials, especially materials derived from micro-technologies, silicon or the like, is advantageous in this respect. The peripheral overmolding makes it possible to give the contact zones 200 such mobiles 20 tribological properties different from those of the cores or base body 250.

Ainsi, en ce qui concerne le balancier 1, le petit plateau 4 est de prƩfƩrence surmoulƩ seulement en pƩriphƩrie radiale du flasque de rigidification 6.Thus, with regard to the rocker 1, the small plate 4 is preferably overmolded only at the radial periphery of the stiffening flange 6.

Dans le cas de la roue d'Ć©chappement 25, le noyau 27, rĆ©alisĆ© par exemple sous forme de rondelle intermĆ©diaire ou d'Ć©toile, permet de limiter la quantitĆ© de matiĆØre plastique surmoulĆ©e sur la pĆ©riphĆ©rie 28 de la roue d'Ć©chappement 25, de sorte Ć  avoir une dilatation de matiĆØre plastique Ć©quivalente Ć  celle de l'ancre 21 au niveau de ses palettes 23. On obtient ainsi un systĆØme thermo-compensĆ© entre les dents 26 et les palettes 23 de l'ancre 21.In the case of the escape wheel 25, the core 27, made for example in the form of an intermediate washer or a star, makes it possible to limit the quantity of plastic material overmolded on the periphery 28 of the escape wheel 25, so as to have an expansion of plastic material equivalent to that of the anchor 21 at its pallets 23. This provides a thermo-compensated system between the teeth 26 and the pallets 23 of the anchor 21.

Dans le cas du balancier surmoulĆ© 1, on peut obtenir la mĆŖme propriĆ©tĆ©, pour avoir un systĆØme thermo-compensĆ© entre la cheville 5 et les cornes 22 de l'ancre 21.In the case of the overmolded balance 1, the same property can be obtained to have a thermo-compensated system between the peg 5 and the horns 22 of the anchor 21.

On comprend que, pour ces deux ensembles ancre-balancier 31, ancre-roue d'Ć©chappement 32, l'exĆ©cution de l'ancre 21 en surmoulage sur un noyau permet d'agir sur la quantitĆ© de matiĆØre soumise Ć  la dilatation/contraction au niveau de l'ancre, ce qui autorise des dimensionnements particuliers du petit plateau 4 et de son flasque 6 d'une part, et de la zone pĆ©riphĆ©rique 28 et de son noyau 27, d'autre part.It will be understood that, for these two sets of rocker arm 31, escapement wheel anchor 32, the execution of the anchor 21 by overmolding on a core makes it possible to act on the quantity of material subjected to expansion / contraction at the same time. anchor level, which allows particular sizing of the small plate 4 and its flange 6 on the one hand, and the peripheral zone 28 and its core 27, on the other.

De faƧon prĆ©fĆ©rĆ©e, le mĆŖme matĆ©riau est utilisĆ© pour le surmoulage (ou la confection complĆØte) de chaque mobile 20 d'un tel ensemble 30, de faƧon Ć  assurer cette thermo-compensation sans autre artifice.Preferably, the same material is used for overmolding (or the complete manufacture) of each mobile 20 of such an assembly 30, so as to provide this heat compensation without other artifice.

Un ensemble 30 Ć  plus de deux mobiles 20 est constituĆ©, dans le prĆ©sent exemple, par la est rĆ©alisĆ© par la combinaison des ensembles ancre-balancier 31, ancre-roue d'Ć©chappement 32 autour de la mĆŖme ancre 21 de part et d'autre de laquelle interagissent le balancier 1 et la roue d'Ć©chappement 25, chacun rĆ©alisĆ© selon les caractĆ©ristiques exposĆ©es ci-dessus.An assembly 30 with more than two mobiles 20 is constituted, in the present example, by the is realized by the combination of sets anchor-balance 31, anchor-escape wheel 32 around the same anchor 21 on both sides of which interact the balance 1 and the escape wheel 25, each made according to the characteristics described above.

L'invention concerne encore un ensemble rƩglant d'horlogerie 10 comportant au moins un tel ensemble 30, et notamment comportant un tel balancier surmoulƩ 1.The invention also relates to a clock setting assembly 10 comprising at least one such assembly 30, and in particular comprising such an overmolded balance 1.

L'invention concerne encore un mouvement d'horlogerie 100 comportant au moins un tel ensemble rƩglant d'horlogerie 10 ou au moins un tel ensemble 30.The invention also relates to a watchmaking movement 100 comprising at least one clocking watch assembly 10 or at least one such assembly 30.

L'invention concerne encore une piĆØce d'horlogerie 1000 comportant au moins un tel ensemble rĆ©glant d'horlogerie 10 ou au moins un tel ensemble 30.The invention also relates to a timepiece 1000 comprising at least one such clock regulation assembly 10 or at least one such assembly 30.

Si l'invention est dĆ©crite dans une application particuliĆØrement avantageuse qui est celle d'un mĆ©canisme d'Ć©chappement, l'homme du mĆ©tier comprend qu'elle est applicable Ć  d'autres configurations Ć  l'intĆ©rieur d'une piĆØce d'horlogerie, partout oĆ¹ un diffĆ©rentiel de dilatation entre mobiles antagonistes est susceptible de perturber la marche, d'altĆ©rer le rendement, voire de provoquer un blocage d'un mĆ©canisme.If the invention is described in a particularly advantageous application which is that of an escape mechanism, one skilled in the art understands that it is applicable to other configurations inside a timepiece, wherever a dilation differential between mobile opposites is likely to disrupt the march, alter the yield, or even cause a blockage of a mechanism.

Claims (14)

  1. Timepiece assembly (30) including at least two opposing mobile components (20; 20A; 20B), coupled to each other and cooperating by contact with each other on peripheral contact surfaces (200; 200A; 200B), wherein each said peripheral contact surface (200; 200A; 200B) of each said coupled mobile component (20; 20A; 20B) in said assembly (30) is the peripheral surface of a skin (210; 201A; 210B) of plastic material, said skin (210; 201A; 210B) carrying said peripheral contact surface (200; 200A; 200B) of each of the two said opposing mobile components (20; 20A; 20B) paired within said assembly (30) is overmoulded onto a basic core (250; 250A; 250B), the cooperation between said mobile components (20; 20A; 20B) pivoting about parallel pivot axes occuring in a perpendicular plane to said pivot axes, characterised in that the sections of peripheral plastic material, measured in a plane perpendicular to the point of contact and parallel to said pivot axes of said two mobile components (20) are equal, in such a way as to have an equivalent plastic expansion or a contraction for each one of said two opposing mobile components (20; 20A; 20B).
  2. Timepiece assembly (30) according to claim 1, characterized in that said skins (210; 201A; 210B) carrying said peripheral contact surfaces (200) of said mobile components (20; 20A; 20B) coupled in pairs within said assembly (30) are made of the same plastic material.
  3. Timepiece assembly (30) according to one of the preceding claims, characterized in that said contact surfaces (200; 200A; 200B) develop parallel to the pivot axis of two said mobile components (20; 20A; 20B) pivoting about parallel axes, and in that the radial section of peripheral plastic material of said skins (210; 201A; 210B) of said two mobile components (20; 20A; 20B) is equal.
  4. Timepiece assembly (30) according to one of the preceding claims, characterized in that the assembly is thermocompensated, and in that, at the contact interface point between said opposing peripheral contact surfaces (200; 200A; 200B), the relative expansions of said two opposing mobile components (20; 20A; 20B) does not cause any differential displacement of said interface point.
  5. Timepiece assembly (30) according to one of the preceding claims, characterized in that the assembly is a pallet lever-balance wheel assembly (31) including, as said mobile components (20; 20A; 20B) cooperating with each other, on the one hand a balance wheel (1) including a small safety-roller (4) including a roller notch (9) and an impulse pin (5) made of plastic material overmoulded on a stiffening flange (6), and on the other hand a pallet lever (21) including horns (22) cooperating with said impulse pin (5) and a guard-pin (4) cooperating with said roller notch (9) and pallet stones (23) arranged to cooperate with an escape wheel (25), said pallet lever (21) being at least partially made of plastic material.
  6. Timepiece assembly (30) according to the preceding claim, characterized in that said pallet lever (21) includes, at least on said horns thereof (22) appertaining to the peripheral contact surfaces (200; 200A; 200B) with said balance (1), a said skin (210; 201A; 210B) overmoulded onto a basic core (250; 250A; 250B).
  7. Timepiece assembly (30) according to claim 5, characterized in that said pallet lever (21) comprises at least on said pallet stones (23) thereof, a said skin (210; 201A; 210B) overmoulded onto a basic core (250; 250A; 250B).
  8. Timepiece assembly (30) according to one of claims 1 to 4, characterized in that the assembly is a pallet lever-balance wheel assembly (32) including, as said mobile components (20; 20A; 20B) cooperating with each other, on the one hand a pallet lever (21) including horns (22) and a guard-pin (4) arranged to cooperate with a balance (1) and pallet stones (23) arranged to cooperate with an escape wheel (25), said pallet lever (21) being at least partially made of plastic material, and on the other hand, an escape wheel (5) including teeth (26) cooperating with said pallet stones (23), and in that said escape wheel (25) is at least partially made of plastic material, and includes, at least on said peripheral surfaces (200; 200A; 200B) in contact with said pallet lever (21) formed by said teeth (26), a said skin (210; 201A; 210B) of plastic material overmoulded onto a basic core (250; 250A; 250B).
  9. Timepiece assembly (30) according to claims 5 and 8, characterized in that the assembly is made by combining said pallet lever-balance assembly (31) and said pallet wheel-escape wheel assembly (32) around the same said pallet lever (21) on either side of which said balance (1) and said escape wheel (25) interact.
  10. Timepiece assembly (30) according to one of the preceding claims, characterized in that at least one said skin (210; 201A; 210B) is overmoulded onto a basic core (250; 250A; 250B) made in a thermally neutral material or silicon, or silicon oxide or quartz.
  11. Timepiece assembly (30) according to one of the preceding claims, characterized in that the assembly includes a timepiece balance (1) overmoulded onto a balance staff (2), which includes a small safety-roller (4) and an impulse pin (5) made of plastic material, together overmoulded onto said staff (2), said staff (2) including a stiffening flange (6) onto which said small safety-roller (4) is overmoulded, and in that said impulse pin (5) projects radially in relation to a body (8) extending said small safety-roller (4) in the axial direction of said balance (1).
  12. Timepiece assembly (30) according to the preceding claim, characterized in that said balance (1) includes a rim (7) overmoulded, together with said small safety-roller (4) and with said impulse pin (5), onto said staff (2) and onto said flange (6).
  13. Timepiece movement (100) including at least one timepiece assembly (30) according to one of claims 1 to 12.
  14. Timepiece (1000) including at least one timepiece assembly (30) according to one of claims 1 to 12.
EP12791757.3A 2011-12-16 2012-11-27 Overmoulded timepiece barrel Active EP2791737B1 (en)

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EP12791757.3A EP2791737B1 (en) 2011-12-16 2012-11-27 Overmoulded timepiece barrel

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EP11194061.5A EP2605081A1 (en) 2011-12-16 2011-12-16 Overmoulded timepiece barrel
EP12791757.3A EP2791737B1 (en) 2011-12-16 2012-11-27 Overmoulded timepiece barrel
PCT/EP2012/073684 WO2013087404A1 (en) 2011-12-16 2012-11-27 Horology assembly that overmoulded as mobiles

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EP2791737A1 EP2791737A1 (en) 2014-10-22
EP2791737B1 true EP2791737B1 (en) 2018-04-04

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EP (2) EP2605081A1 (en)
JP (1) JP5873569B2 (en)
CN (1) CN103998997B (en)
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JP6721454B2 (en) * 2016-08-10 2020-07-15 ć‚·ćƒć‚ŗćƒ³ę™‚č؈ę Ŗ式会ē¤¾ Watch parts
CN114545757B (en) * 2022-04-26 2022-07-05 å¤©ę“„ęµ·éø„č”Øäøšé›†å›¢ęœ‰é™å…¬åø Frock is used in dismouting of balance shaft

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US3791251A (en) * 1972-06-05 1974-02-12 Bunker Ramo Timepiece escapement
US3803830A (en) * 1972-06-29 1974-04-16 Bunker Ramo Plastic escapement lever
US3834155A (en) * 1974-02-19 1974-09-10 Timex Corp Offset pallet lever for watch escapement
DE2410098C3 (en) * 1974-03-02 1979-07-26 Diehl Gmbh & Co, 8500 Nuernberg Time switch
US3999445A (en) * 1975-07-07 1976-12-28 Liautaud James P Pinion gear
FR2388322A1 (en) * 1977-04-21 1978-11-17 Portescap TOGETHER CONSTITUTED BY THE ANCHOR OF A HOURLY INSTRUMENT AND THE BUILDING OF THIS
JP4919154B2 (en) * 2006-12-19 2012-04-18 ć‚¹ć‚ŗ悭ę Ŗ式会ē¤¾ Resin gear
EP2151722B8 (en) * 2008-07-29 2021-03-31 Rolex Sa Hairspring for balance-spring resonator
EP2363762B1 (en) * 2010-03-04 2017-11-22 Montres Breguet SA Timepiece including a high-frequency mechanical movement

Also Published As

Publication number Publication date
EP2605081A1 (en) 2013-06-19
JP5873569B2 (en) 2016-03-01
CN103998997B (en) 2016-09-14
WO2013087404A1 (en) 2013-06-20
WO2013087404A4 (en) 2013-08-15
HK1200926A1 (en) 2015-08-14
JP2015505041A (en) 2015-02-16
EP2791737A1 (en) 2014-10-22
US20140376337A1 (en) 2014-12-25
CN103998997A (en) 2014-08-20

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