EP3594757B1 - Timepiece component with ceramic non-magnetic arboured portion - Google Patents

Timepiece component with ceramic non-magnetic arboured portion Download PDF

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Publication number
EP3594757B1
EP3594757B1 EP18182666.0A EP18182666A EP3594757B1 EP 3594757 B1 EP3594757 B1 EP 3594757B1 EP 18182666 A EP18182666 A EP 18182666A EP 3594757 B1 EP3594757 B1 EP 3594757B1
Authority
EP
European Patent Office
Prior art keywords
component
shaft
pivot axis
ceramic
timepiece
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
EP18182666.0A
Other languages
German (de)
French (fr)
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EP3594757A1 (en
Inventor
Alain Delizée
Cédric Reymond
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.)
Blancpain SA
Original Assignee
Blancpain 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 Blancpain SA filed Critical Blancpain SA
Priority to EP18182666.0A priority Critical patent/EP3594757B1/en
Priority to US16/436,987 priority patent/US11500333B2/en
Priority to JP2019118231A priority patent/JP6847165B2/en
Priority to CN201910619300.0A priority patent/CN110703579B/en
Publication of EP3594757A1 publication Critical patent/EP3594757A1/en
Application granted granted Critical
Publication of EP3594757B1 publication Critical patent/EP3594757B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • G04B13/00—Gearwork
    • G04B13/02—Wheels; Pinions; Spindles; Pivots
    • G04B13/021—Wheels; Pinions; Spindles; Pivots elastic fitting with a spindle, axis or shaft
    • G04B13/022—Wheels; Pinions; Spindles; Pivots elastic fitting with a spindle, axis or shaft with parts made of hard material, e.g. silicon, diamond, sapphire, quartz and the like
    • 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
    • G04B13/025—Wheels; Pinions; Spindles; Pivots with elastic means between the toothing and the hub of a toothed 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
    • G04B43/00—Protecting clockworks by shields or other means against external influences, e.g. magnetic fields
    • G—PHYSICS
    • G04—HOROLOGY
    • G04D—APPARATUS OR TOOLS SPECIALLY DESIGNED FOR MAKING OR MAINTAINING CLOCKS OR WATCHES
    • G04D3/00—Watchmakers' or watch-repairers' machines or tools for working materials
    • G04D3/0074—Watchmakers' or watch-repairers' machines or tools for working materials for treatment of the material, e.g. surface treatment
    • G04D3/0079—Watchmakers' or watch-repairers' machines or tools for working materials for treatment of the material, e.g. surface treatment for gearwork components
    • G04D3/0084—Watchmakers' or watch-repairers' machines or tools for working materials for treatment of the material, e.g. surface treatment for gearwork components for axles, sleeves
    • G—PHYSICS
    • G04—HOROLOGY
    • G04D—APPARATUS OR TOOLS SPECIALLY DESIGNED FOR MAKING OR MAINTAINING CLOCKS OR WATCHES
    • G04D3/00—Watchmakers' or watch-repairers' machines or tools for working materials
    • G04D3/02—Lathes, with one or more supports; Burnishing machines, with one or more supports
    • G04D3/0227—Lathes, with one or more supports; Burnishing machines, with one or more supports for the manufacture of special components for clockworks
    • G04D3/0236—Lathes, with one or more supports; Burnishing machines, with one or more supports for the manufacture of special components for clockworks for gearwork components
    • G04D3/0254—Lathes, with one or more supports; Burnishing machines, with one or more supports for the manufacture of special components for clockworks for gearwork components for axles, sleeves

Definitions

  • the invention relates to a timepiece component comprising a shaft portion comprising at least one pivot about a pivot axis.
  • the invention also relates to a clock oscillator, comprising at least one such component.
  • the invention also relates to a timepiece movement, comprising at least one such oscillator, and / or at least one such component.
  • the invention also relates to a timepiece comprising at least one such movement and / or at least one such oscillator, and / or at least one such component.
  • the invention also relates to a method of making a timepiece component, more particularly a timepiece mobile, which component comprises a shaft part, which comprises at least one pivot about a pivot axis.
  • the invention relates to the field of watch components and moving parts, and more particularly the production of moving parts that include oscillators or clock movements.
  • the document EP3258325A1 in the name of ROLEX describes a watch shaft, in particular a balance shaft, comprising a first functional portion including at least part of a tigeron and / or at least part of a pivot, the first functional portion being made of ceramic and a first outer diameter of the first functional portion being less than 0.5 mm, or even less than 0.4 mm, or even less than 0.2 mm, or even less than 0.1 mm.
  • the document FR143887A in the name of TISSOT describes a device for fixing one end of a hairspring regulating the clockwork movement to a connecting member.
  • This connecting member has hooking notches, in particular splines, and may be integral with the shaft of the balance with which the hairspring cooperates.
  • the invention proposes to offer an alternative to traditional watch mobiles comprising steel shafts, and to combine perfect geometry and excellent resistance.
  • the invention relates to a timepiece component comprising a shaft part comprising at least one pivot about a pivot axis, according to claim 1.
  • the invention also relates to a clock oscillator, comprising at least one such component.
  • the invention also relates to a timepiece movement, comprising at least one such oscillator, and / or at least one such component.
  • the invention also relates to a timepiece comprising at least one such movement and / or at least one such oscillator, and / or at least one such component.
  • the invention also relates to a method for producing a timepiece component, more particularly a timepiece mobile, which component comprises a shaft part, which comprises at least one pivot about a pivot axis, according to claim 18. .
  • the invention relates to a timepiece component 1, more particularly a timepiece mobile.
  • This component 1 comprises a shaft part 2, which comprises at least one pivot 3 around a pivot axis D.
  • At least the constituent material of the shaved part 2 is a ceramic, or the like.
  • this shafted part 2 comprises a plurality of recesses 7, which are balanced around the pivot axis D, and in particular which are distributed regularly around the pivot axis D, and has its center of inertia on the pivot pin D.
  • This shafted part 2 comprises a zone of greater diameter, called collar 9, which constitutes its largest diameter with respect to the pivot axis D.
  • this collar 9 comprises a parting plane 90 of the shaft part 2, which parting plane 90 is substantially perpendicular to the pivot axis D.
  • the collar 9 is crossed by the recesses 7.
  • At least one recess 7 contains an injection point 8 of the material. More particularly, each recess 7 contains an injection point 8 of the material.
  • the injection point 8 is located in the zone of the recess 7 which is closest to the pivot axis D. And, in a particular variant, the injection point is located, according to the direction of the axis D, at the level of the middle of the collar 9.
  • the housing of the injection point 8 in a recess 7 is particularly advantageous, because as a result there is no interference with any functional range of revolution whatsoever.
  • a possible retouching of the injection point 8 is extremely easy, and has absolutely no risk of injuring a functional scope.
  • At least one injection point is located in another non-functional part of the shaved part 2, for example under the larger diameter, or is located in another non-functional part of the component 1 made with the shaved part 2 and in the same material, in particular a ceramic.
  • non-functional part is meant here a part of the component of which no surface is arranged to cooperate with another component of a clockwork mechanism.
  • the injection point 8 is housed in the bottom of a groove of revolution.
  • the cross section of the shaved part decreases from the parting line 9 towards each distal end preferably comprising a pivot 3 and / or a tigeron. This execution makes it possible to obtain the pivot seats without injection seams.
  • injection point depends on the mold and the production facility used. It is generally circular, but this execution is not restrictive, the injection point can also be a short segment, and its surface area and its shape are linked to the space available on component 1 in a non-functional area, as on an anchor rod, or a flange or a toothed base for a pinion, or the like.
  • the injection point is advantageously housed in the bottom of a notch or a recess.
  • the shafted part 2 comprises, for the support of a rim 4 or of a plate 40 that the component 1 comprises, at least one bearing surface 5, 6, of revolution about the pivot axis D, which is adjacent to at least one bearing surface 50, 60, which is of revolution about the pivot axis D.
  • This rim 4 can be a balance rim, or a toothed plate, or the like.
  • the component 1 is a wheel or a pinion, and comprises, at the level of its collar 9, a toothing which can also be made of ceramic, and come from injection, which makes it possible to avoid any reworking machining. or trimming.
  • the shaved part 2 comprises, on either side of the collar 9, a first and a second bearing surface 5, 6, and a first and a second bearing surfaces 50, 60.
  • the bearing surface 5, 6 is cylindrical.
  • the second bearing surface 50, 60 is conical or planar.
  • the figure 1 illustrates a component 1, which is here a mobile constituting a balance; and which comprises a through-shaft part 2 including two pivots 3 at its distal ends along the axis of rotation D.
  • the shaft part 2 carries, on a first bearing surface 5, a balance rim 4 which is in lateral support on a first flank 6 of the flange 9.
  • the shaved part 2 also bears, on a second bearing surface 50 and resting on a second flank 60 of the flange 9 opposite the first flank 6, a balance plate 40 carrying a plate pin
  • the material is a ceramic.
  • a ceramic comprises at least a first element chosen from aluminum oxide, zirconium oxide, silicon oxide, silicon nitride, silicon carbide, silicon nitride, titanium carbide, boron carbide, titanium diboride TiB 2 , diamond, tungsten carbide, vitreous silica, or the like.
  • this ceramic can comprise a plurality of components chosen from aluminum oxide, zirconium oxide, silicon oxide, silicon nitride, silicon carbide, silicon nitride, titanium carbide, boron carbide, titanium diboride TiB 2 , diamond, tungsten carbide, vitreous silica, or the like.
  • This ceramic generally comprises at least one stabilizer, and / or at least one dopant, and / or at least one material allowing the improvement of the mechanical properties, such as MgO, CaO, Y 2 O 3 , or similar, and / or at least one additive such as carbon, carbon fibers, carbon nanotubes, colored pigment, electret, or the like, for other lubricating, appearance, magnetic, or other properties.
  • the mechanical properties such as MgO, CaO, Y 2 O 3 , or similar
  • additive such as carbon, carbon fibers, carbon nanotubes, colored pigment, electret, or the like, for other lubricating, appearance, magnetic, or other properties.
  • such a ceramic is injected into a mold, then sintered, to produce the component.
  • the component illustrated in the figures is for example advantageously made of zirconium oxide ZrO 2 , usually called zirconia, with at least one yttrium oxide dopant Y 2 O 3 .
  • the material of the shaved part in particular such a ceramic, is entirely non-magnetic.
  • the material of the shaft part in particular such a ceramic, is loaded with magnetized and / or magnetizable particles.
  • the component 1 is a balance, and carries, on the shaft part 2, at least one rim 4 and a plate 40.
  • the invention also relates to a timepiece oscillator 100, comprising at least one such component 1.
  • the invention also relates to a clockwork movement 200, comprising at least one such oscillator 100, and / or at least one such component 1.
  • the invention also relates to a timepiece 1000 comprising at least one such movement 200 and / or at least one such oscillator 100, and / or at least one such component 1. More particularly, this timepiece 1000 is a watch. .
  • the invention also relates to a method for producing a timepiece component 1, more particularly a timepiece mobile, which component 1 comprises a shaft part 2, which comprises at least one pivot 3 about a pivot axis D
  • this shaved part 2 is produced by injecting a material of ceramic or similar type into a mold in at least two parts arranged for the direct production of surfaces of revolution at each pivot 3. More particularly, at the level of each pivot 3. at least two parts of the mold are aligned along the pivot axis D; more particularly still, these at least two aligned parts extend on either side and a parting plane at the level of which is located the zone of larger diameter of the shaved part 2, which zone of larger diameter defines a flange 9.
  • the material is injected into the mold at the level of at least one injection point 8 made in at least one recess 7 which the collar 9 comprises, and which corresponds to a protruding part of the mold. More particularly, the material is injected at the level of at least one injection point 8, in the zone of the recess 7 concerned which is closest to the pivot axis D.
  • the hardening of the mold is carried out. injection material according to the process specific to this material, polymerization, sintering, or other. The mold is opened after the injection material has hardened.
  • the component 1 is not limited to the shaved part 2, and comprises at least one added element such as a rim 4 and / or a plate 40, and / or peg or the like, we returns each such element on the tree part and it is immobilized by gluing or the like. More particularly but without limitation, this immobilization is irreversible.
  • the invention thus makes it possible to produce a timepiece component, and in particular a timepiece mobile, with a precise shape and surfaces of revolution by injecting material into a mold in at least two parts.
  • This material can in particular be a non-magnetic ceramic.
  • the production process allows a saving in material due to a production substantially at finished dimensions, and a significant saving in machining. Such an injection process also guarantees good direct balancing of the shaved part.
  • the finishes are kept to a minimum, and, depending on the function of component 1, may even be superfluous.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Micromachines (AREA)
  • Electromechanical Clocks (AREA)
  • Metallurgy (AREA)
  • Sliding-Contact Bearings (AREA)

Description

Domaine de l'inventionField of the invention

L'invention concerne un composant d'horlogerie comportant une partie arbrée comportant au moins un pivot autour d'un axe de pivot.The invention relates to a timepiece component comprising a shaft portion comprising at least one pivot about a pivot axis.

L'invention concerne encore un oscillateur d'horlogerie, comportant au moins un tel composant.The invention also relates to a clock oscillator, comprising at least one such component.

L'invention concerne encore un mouvement d'horlogerie, comportant au moins un tel oscillateur, et/ou au moins un tel composant.The invention also relates to a timepiece movement, comprising at least one such oscillator, and / or at least one such component.

L'invention concerne encore une pièce d'horlogerie comportant au moins un tel mouvement et/ou au moins un tel oscillateur, et/ou au moins un tel composant.The invention also relates to a timepiece comprising at least one such movement and / or at least one such oscillator, and / or at least one such component.

L'invention concerne encore un procédé de réalisation d'un composant d'horlogerie, plus particulièrement un mobile d'horlogerie, lequel composant comporte une partie arbrée, laquelle comporte au moins un pivot autour d'un axe de pivot.The invention also relates to a method of making a timepiece component, more particularly a timepiece mobile, which component comprises a shaft part, which comprises at least one pivot about a pivot axis.

L'invention concerne le domaine des composants et mobiles d'horlogerie, et plus particulièrement la réalisation de mobiles que comportent des oscillateurs ou des mouvements d'horlogerie.The invention relates to the field of watch components and moving parts, and more particularly the production of moving parts that include oscillators or clock movements.

Arrière-plan de l'inventionBackground of the invention

La confection de petits composants d'horlogerie, en particulier de mobiles, est toujours une préoccupation pour l'industriel, en raison de coûts d'usinage qui peuvent être élevés, et de la difficulté pour réaliser certaines géométries, en particulier quand le composant concerné a de gros écarts de section, comme c'est le cas, par exemple, pour un balancier: un tel mobile doit avoir un pivotement parfait malgré un petit diamètre de pivot, et doit être suffisamment résistant aux chocs, tout voile se traduisant par un balourd préjudiciable au maintien d'une fréquence d'oscillation constante.The manufacture of small watch components, in particular mobiles, is always a concern for the manufacturer, because of machining costs which can be high, and the difficulty of producing certain geometries, in particular when the component concerned has large section deviations, as is the case, for example, for a balance: such a mobile must have perfect pivoting despite a small pivot diameter, and must be sufficiently resistant to shocks, any veil resulting in a unbalance detrimental to maintaining a constant oscillation frequency.

Le document EP3258325A1 au nom de ROLEX décrit un arbre horloger, notamment un arbre de balancier, comprenant une première portion fonctionnelle incluant au moins une partie d'un tigeron et/ou au moins une partie d'un pivot, la première portion fonctionnelle étant en céramique et un premier diamètre extérieur de la première portion fonctionnelle étant inférieur à 0.5 mm, voire inférieur à 0.4 mm, voire inférieur à 0.2 mm, voire inférieur à 0.1 mm.The document EP3258325A1 in the name of ROLEX describes a watch shaft, in particular a balance shaft, comprising a first functional portion including at least part of a tigeron and / or at least part of a pivot, the first functional portion being made of ceramic and a first outer diameter of the first functional portion being less than 0.5 mm, or even less than 0.4 mm, or even less than 0.2 mm, or even less than 0.1 mm.

Le document FR143887A au nom de TISSOT décrit un dispositif de fixation d'une extrémité d'un spiral réglant le mouvement d'horlogerie à un organe de liaison. Cet organe de liaison comporte des échancrures d'accrochage, notamment des cannelures, et peut être monobloc avec l'arbre du balancier avec lequel coopère le spiral.The document FR143887A in the name of TISSOT describes a device for fixing one end of a hairspring regulating the clockwork movement to a connecting member. This connecting member has hooking notches, in particular splines, and may be integral with the shaft of the balance with which the hairspring cooperates.

Résumé de l'inventionSummary of the invention

L'invention se propose d'offrir une alternative aux mobiles d'horlogerie traditionnels comportant des arbres en acier, et de combiner une géométrie parfaite et une excellente résistance.The invention proposes to offer an alternative to traditional watch mobiles comprising steel shafts, and to combine perfect geometry and excellent resistance.

A cet effet, l'invention concerne un composant d'horlogerie comportant une partie arbrée comportant au moins un pivot autour d'un axe de pivot, selon la revendication 1.To this end, the invention relates to a timepiece component comprising a shaft part comprising at least one pivot about a pivot axis, according to claim 1.

L'invention concerne encore un oscillateur d'horlogerie, comportant au moins un tel composant.The invention also relates to a clock oscillator, comprising at least one such component.

L'invention concerne encore un mouvement d'horlogerie, comportant au moins un tel oscillateur, et/ou au moins un tel composant.The invention also relates to a timepiece movement, comprising at least one such oscillator, and / or at least one such component.

L'invention concerne encore une pièce d'horlogerie comportant au moins un tel mouvement et/ou au moins un tel oscillateur, et/ou au moins un tel composant.The invention also relates to a timepiece comprising at least one such movement and / or at least one such oscillator, and / or at least one such component.

L'invention concerne encore un procédé de réalisation d'un composant d'horlogerie, plus particulièrement un mobile d'horlogerie, lequel composant comporte une partie arbrée, laquelle comporte au moins un pivot autour d'un axe de pivot, selon la revendication 18.The invention also relates to a method for producing a timepiece component, more particularly a timepiece mobile, which component comprises a shaft part, which comprises at least one pivot about a pivot axis, according to claim 18. .

Description sommaire des dessinsBrief description of the drawings

D'autres caractéristiques et avantages de l'invention apparaîtront à la lecture de la description détaillée qui va suivre, en référence aux dessins annexés, où :

  • la figure 1 représente, de façon schématisée, et en vue de côté, un composant d'horlogerie selon l'invention, qui est ici un mobile constituant un balancier; et qui comporte une partie arbrée traversante incluant deux pivots à ses extrémités distales selon l'axe de rotation, laquelle partie arbrée porte, sur une première portée, une serge de balancier qui est en appui latéral sur un premier flanc d'une collerette qui constitue la zone de plus grand diamètre de la partie arbrée, laquelle porte encore, sur une deuxième portée et en appui sur un deuxième flanc de la collerette opposé au premier, un plateau de balancier porteur d'une cheville de plateau ;
  • la figure 2 représente, de façon schématisée et en perspective, la partie arbrée seule de ce mobile, laquelle partie arbrée comporte ici trois évidements à 120° qui traversent tous la collerette, et au fond desquels sont visibles des points d'injection ;
  • la figure 3 représente cette partie arbrée de façon similaire à la figure 1 ;
  • la figure 4 représente cette partie arbrée en vue de bout ;
  • la figure 5 est un schéma-blocs représentant une montre comportant un mouvement d'horlogerie, qui comporte un oscillateur, lequel incorpore un tel mobile.
Other characteristics and advantages of the invention will become apparent on reading the detailed description which follows, with reference to the appended drawings, where:
  • the figure 1 represents, schematically, and in side view, a timepiece component according to the invention, which is here a mobile constituting a balance; and which comprises a through-shaft portion including two pivots at its distal ends along the axis of rotation, which shaft portion carries, on a first bearing surface, a balance rim which is in lateral support on a first flank of a collar which constitutes the area of the largest diameter of the shaft part, which also bears, on a second bearing surface and resting on a second flank of the collar opposite the first, a balance plate carrying a plate pin;
  • the figure 2 represents, schematically and in perspective, the only shafted part of this mobile, which shafted part here comprises three recesses at 120 ° which all pass through the collar, and at the bottom of which are visible injection points;
  • the figure 3 represents this shaved part in a similar way to the figure 1 ;
  • the figure 4 represents this shaved part in end view;
  • the figure 5 is a block diagram representing a watch comprising a clockwork movement, which comprises an oscillator, which incorporates such a mobile.

Description détaillée des modes de réalisation préférésDetailed description of the preferred embodiments

L'invention concerne un composant 1 d'horlogerie, plus particulièrement un mobile d'horlogerie. Ce composant 1 comporte une partie arbrée 2, laquelle comporte au moins un pivot 3 autour d'un axe de pivot D.The invention relates to a timepiece component 1, more particularly a timepiece mobile. This component 1 comprises a shaft part 2, which comprises at least one pivot 3 around a pivot axis D.

Au moins le matériau constitutif de la partie arbrée 2 est une céramique, ou similaire.At least the constituent material of the shaved part 2 is a ceramic, or the like.

Et cette partie arbrée 2 comporte une pluralité d'évidements 7, qui sont équilibrés autour de l'axe de pivot D, et notamment qui sont répartis régulièrement autour de l'axe de pivot D, et a son centre d'inertie sur l'axe de pivot D.And this shafted part 2 comprises a plurality of recesses 7, which are balanced around the pivot axis D, and in particular which are distributed regularly around the pivot axis D, and has its center of inertia on the pivot pin D.

Cette partie arbrée 2 comporte une zone de plus grand diamètre, appelée collerette 9, qui constitue son plus grand diamètre par rapport à l'axe de pivot D.This shafted part 2 comprises a zone of greater diameter, called collar 9, which constitutes its largest diameter with respect to the pivot axis D.

Plus particulièrement cette collerette 9 comporte un plan de joint 90 de la partie arbrée 2, lequel plan de joint 90 est sensiblement perpendiculaire à l'axe de pivot D.More particularly, this collar 9 comprises a parting plane 90 of the shaft part 2, which parting plane 90 is substantially perpendicular to the pivot axis D.

Plus particulièrement, la collerette 9 est traversée par les évidements 7.More particularly, the collar 9 is crossed by the recesses 7.

Selon l'invention, dans une réalisation particulière et avantageuse quand le matériau constitutif de la partie arbrée 2 est injectable, au moins un évidement 7 renferme un point d'injection 8 du matériau. Plus particulièrement, chaque évidement 7 renferme un point d'injection 8 du matériau. De façon avantageuse, le point d'injection 8 est situé dans la zone de l'évidement 7 qui est la plus proche de l'axe de pivot D. Et, dans une variante particulière, le point d'injection est situé, selon la direction de l'axe D, au niveau du milieu de la collerette 9.According to the invention, in a particular and advantageous embodiment when the material constituting the shaft part 2 is injectable, at least one recess 7 contains an injection point 8 of the material. More particularly, each recess 7 contains an injection point 8 of the material. Advantageously, the injection point 8 is located in the zone of the recess 7 which is closest to the pivot axis D. And, in a particular variant, the injection point is located, according to the direction of the axis D, at the level of the middle of the collar 9.

Le logement du point d'injection 8 dans un évidement 7 est particulièrement avantageux, car de ce fait il n'existe aucune interférence avec quelque portée fonctionnelle de révolution que ce soit. De plus, dans le cas particulier illustré par les figures d'évidements 7 cylindriques, une retouche éventuelle du point d'injection 8 est extrêmement facile, et ne risque absolument pas de blesser une portée fonctionnelle.The housing of the injection point 8 in a recess 7 is particularly advantageous, because as a result there is no interference with any functional range of revolution whatsoever. In addition, in the particular case illustrated by the figures of cylindrical recesses 7, a possible retouching of the injection point 8 is extremely easy, and has absolutely no risk of injuring a functional scope.

Dans un autre mode de réalisation, au moins un point d'injection se situe dans une autre partie non fonctionnelle de la partie arbrée 2, par exemple sous le plus grand diamètre, ou se situe dans une autre partie non fonctionnelle du composant 1 réalisée avec la partie arbrée 2 et dans le même matériau, notamment une céramique. Par partie non fonctionnelle on entend ici une partie du composant dont aucune surface n'est agencée pour coopérer avec un autre composant d'un mécanisme d'horlogerie.In another embodiment, at least one injection point is located in another non-functional part of the shaved part 2, for example under the larger diameter, or is located in another non-functional part of the component 1 made with the shaved part 2 and in the same material, in particular a ceramic. By non-functional part is meant here a part of the component of which no surface is arranged to cooperate with another component of a clockwork mechanism.

Dans une variante, le point d'injection 8 est logé dans le fond d'une gorge de révolution.In a variant, the injection point 8 is housed in the bottom of a groove of revolution.

Pour une fabrication par injection dans un moule en deux parties de part et d'autre du plan de joint 90, la section de la partie arbrée décroit depuis le plan de joint 9 vers chaque extrémité distale comportant de préférence un pivot 3 et/ou un tigeron. Cette exécution permet d'obtenir les portées de pivot sans couture d'injection.For manufacture by injection in a mold in two parts on either side of the parting line 90, the cross section of the shaved part decreases from the parting line 9 towards each distal end preferably comprising a pivot 3 and / or a tigeron. This execution makes it possible to obtain the pivot seats without injection seams.

La forme du « point d'injection » dépend du moule et de l'installation de production utilisée. Elle est en général circulaire, mais cette exécution n'est pas limitative, le point d'injection peut aussi être un court segment, et sa superficie et sa forme sont liées à l'espace disponible sur le composant 1 dans une zone non fonctionnelle, comme sur une tige d'ancre, ou encore un flasque ou un fond de denture pour un pignon, ou similaire. Le point d'injection est avantageusement logé dans le fond d'une encoche ou d'un évidement.The shape of the “injection point” depends on the mold and the production facility used. It is generally circular, but this execution is not restrictive, the injection point can also be a short segment, and its surface area and its shape are linked to the space available on component 1 in a non-functional area, as on an anchor rod, or a flange or a toothed base for a pinion, or the like. The injection point is advantageously housed in the bottom of a notch or a recess.

De façon particulière, la partie arbrée 2 comporte, pour l'appui d'une serge 4 ou d'un plateau 40 que comporte le composant 1, au moins une portée 5, 6, de révolution autour de l'axe de pivot D, qui est adjacente à au moins une surface d'appui 50, 60, laquelle est de révolution autour de l'axe de pivot D. Cette serge 4 peut être une serge de balancier, ou un plateau denté, ou autre.In particular, the shafted part 2 comprises, for the support of a rim 4 or of a plate 40 that the component 1 comprises, at least one bearing surface 5, 6, of revolution about the pivot axis D, which is adjacent to at least one bearing surface 50, 60, which is of revolution about the pivot axis D. This rim 4 can be a balance rim, or a toothed plate, or the like.

Dans une autre exécution, le composant 1 est une roue ou un pignon, et comporte, au niveau de sa collerette 9, une denture qui peut également être en céramique, et venir d'injection, ce qui permet d'éviter tout usinage de reprise ou de taillage.In another embodiment, the component 1 is a wheel or a pinion, and comprises, at the level of its collar 9, a toothing which can also be made of ceramic, and come from injection, which makes it possible to avoid any reworking machining. or trimming.

Plus particulièrement, la partie arbrée 2 comporte, de part et d'autre de la collerette 9, une première et une deuxième portées 5, 6, et une première et une deuxième surfaces d'appui 50, 60.More particularly, the shaved part 2 comprises, on either side of the collar 9, a first and a second bearing surface 5, 6, and a first and a second bearing surfaces 50, 60.

Dans une variante, la portée 5, 6, est cylindrique.In a variant, the bearing surface 5, 6 is cylindrical.

Dans une variante, la deuxième surface d'appui 50, 60, est conique ou plane.In a variant, the second bearing surface 50, 60 is conical or planar.

La figure 1 illustre un composant 1, qui est ici un mobile constituant un balancier; et qui comporte une partie arbrée 2, traversante incluant deux pivots 3 à ses extrémités distales selon l'axe de rotation D. La partie arbrée 2 porte, sur une première portée 5, une serge de balancier 4 qui est en appui latéral sur un premier flanc 6 de la collerette 9. La partie arbrée 2 porte encore, sur une deuxième portée 50 et en appui sur un deuxième flanc60 de la collerette 9 opposé au premier flanc 6, un plateau de balancier 40 porteur d'une cheville de plateauThe figure 1 illustrates a component 1, which is here a mobile constituting a balance; and which comprises a through-shaft part 2 including two pivots 3 at its distal ends along the axis of rotation D. The shaft part 2 carries, on a first bearing surface 5, a balance rim 4 which is in lateral support on a first flank 6 of the flange 9. The shaved part 2 also bears, on a second bearing surface 50 and resting on a second flank 60 of the flange 9 opposite the first flank 6, a balance plate 40 carrying a plate pin

Plus particulièrement le matériau est une céramique. Une telle céramique comporte au moins un premier élément choisi parmi l'oxyde d'aluminium, l'oxyde de zirconium, l'oxyde de silicium, le nitrure de silicium, le carbure de silicium, le nitrure de silicium, le carbure de titane, le carbure de bore, le diborure de titane TiB2, le diamant, le carbure de tungstène, la silice vitreuse, ou similaire. Naturellement cette céramique peut comporter une pluralité de composants choisis parmi l'oxyde d'aluminium, l'oxyde de zirconium, l'oxyde de silicium, le nitrure de silicium, le carbure de silicium, le nitrure de silicium, le carbure de titane, le carbure de bore, le diborure de titane TiB2, le diamant, le carbure de tungstène, la silice vitreuse, ou similaire. Cette céramique comporte en général au moins un stabilisateur, et/ou au moins un dopant, et/ou au moins un matériau permettant l'amélioration des propriétés mécaniques, tel que MgO, CaO, Y2O3, ou similaire, et/ou au moins un additif tel que carbone, fibres de carbone, nano-tubes de carbone, pigment coloré, électret, ou autre, pour d'autres propriétés de lubrification, d'aspect, magnétiques, ou autres. Non limitativement, une telle céramique est injectée dans un moule, puis frittée, pour réaliser le composant.More particularly the material is a ceramic. Such a ceramic comprises at least a first element chosen from aluminum oxide, zirconium oxide, silicon oxide, silicon nitride, silicon carbide, silicon nitride, titanium carbide, boron carbide, titanium diboride TiB 2 , diamond, tungsten carbide, vitreous silica, or the like. Naturally, this ceramic can comprise a plurality of components chosen from aluminum oxide, zirconium oxide, silicon oxide, silicon nitride, silicon carbide, silicon nitride, titanium carbide, boron carbide, titanium diboride TiB 2 , diamond, tungsten carbide, vitreous silica, or the like. This ceramic generally comprises at least one stabilizer, and / or at least one dopant, and / or at least one material allowing the improvement of the mechanical properties, such as MgO, CaO, Y 2 O 3 , or similar, and / or at least one additive such as carbon, carbon fibers, carbon nanotubes, colored pigment, electret, or the like, for other lubricating, appearance, magnetic, or other properties. Without limitation, such a ceramic is injected into a mold, then sintered, to produce the component.

Le composant illustré sur les figures est par exemple avantageusement réalisé en oxyde de zirconium ZrO2, usuellement dénommé zircone, avec au moins un dopant d'oxyde d'yttrium Y2O3.The component illustrated in the figures is for example advantageously made of zirconium oxide ZrO 2 , usually called zirconia, with at least one yttrium oxide dopant Y 2 O 3 .

De façon particulière, le matériau de la partie arbrée, notamment une telle céramique, est entièrement amagnétique.In particular, the material of the shaved part, in particular such a ceramic, is entirely non-magnetic.

Dans une alternative, le matériau de la partie arbrée, notamment une telle céramique, est chargé avec des particules aimantée et/ou magnétisables.In an alternative, the material of the shaft part, in particular such a ceramic, is loaded with magnetized and / or magnetizable particles.

Dans une application particulière, le composant 1 est un balancier, et porte, sur la partie arbrée 2, au moins une serge 4 et un plateau 40.In a particular application, the component 1 is a balance, and carries, on the shaft part 2, at least one rim 4 and a plate 40.

L'invention concerne encore un oscillateur 100 d'horlogerie, comportant au moins un tel composant 1.The invention also relates to a timepiece oscillator 100, comprising at least one such component 1.

L'invention concerne encore un mouvement 200 d'horlogerie, comportant au moins un tel oscillateur 100, et/ou au moins un tel composant 1.The invention also relates to a clockwork movement 200, comprising at least one such oscillator 100, and / or at least one such component 1.

L'invention concerne encore une pièce d'horlogerie 1000 comportant au moins un tel mouvement 200 et/ou au moins un tel oscillateur 100, et/ou au moins un tel composant 1. Plus particulièrement, cette pièce d'horlogerie 1000 est une montre.The invention also relates to a timepiece 1000 comprising at least one such movement 200 and / or at least one such oscillator 100, and / or at least one such component 1. More particularly, this timepiece 1000 is a watch. .

L'invention concerne encore un procédé de réalisation d'un composant 1 d'horlogerie, plus particulièrement un mobile d'horlogerie, lequel composant 1 comporte une partie arbrée 2, laquelle comporte au moins un pivot 3 autour d'un axe de pivot D. Selon ce procédé, on réalise cette partie arbrée 2 par injection d'un matériau de type céramique ou similaire dans un moule en au moins deux parties agencé pour la confection directe de surfaces de révolution au niveau de chaque pivot 3. Plus particulièrement, au moins deux parties du moule sont alignées selon l'axe de pivot D ; plus particulièrement encore, ces au moins deux parties alignées s'étendent de part et d'un plan de joint au niveau duquel se situe la zone de plus grand diamètre de la partie arbrée 2, laquelle zone de plus grand diamètre définit une collerette 9. Plus particulièrement on injecte le matériau dans le moule au niveau d'au moins un point d'injection 8 ménagé dans au moins un évidement 7 que comporte la collerette 9, et qui correspond à une partie saillante du moule. Plus particulièrement on injecte le matériau au niveau d'au moins un point d'injection 8, dans la zone de l'évidement 7 concerné qui est la plus proche de l'axe de pivot D. Après remplissage du moule on procède au durcissement du matériau d'injection selon le procédé propre à ce matériau, polymérisation, frittage, ou autre. On ouvre le moule après durcissement du matériau d'injection. Si nécessaire on procède à une reprise par rectification et/ou diamantage, ou similaire, des portées de révolution et notamment des pivots et/ou tigerons que comporte la partie arbrée 2. Quand le composant 1 ne se limite pas à la partie arbrée 2, et comporte au moins un élément rapporté tel qu'une serge 4 et/ou un plateau 40, et/ou cheville ou similaire, on rapporte chaque tel élément sur la partie arbrée et on l'immobilise par collage ou similaire. Plus particulièrement mais non limitativement, cette immobilisation est irréversible.The invention also relates to a method for producing a timepiece component 1, more particularly a timepiece mobile, which component 1 comprises a shaft part 2, which comprises at least one pivot 3 about a pivot axis D According to this method, this shaved part 2 is produced by injecting a material of ceramic or similar type into a mold in at least two parts arranged for the direct production of surfaces of revolution at each pivot 3. More particularly, at the level of each pivot 3. at least two parts of the mold are aligned along the pivot axis D; more particularly still, these at least two aligned parts extend on either side and a parting plane at the level of which is located the zone of larger diameter of the shaved part 2, which zone of larger diameter defines a flange 9. More particularly, the material is injected into the mold at the level of at least one injection point 8 made in at least one recess 7 which the collar 9 comprises, and which corresponds to a protruding part of the mold. More particularly, the material is injected at the level of at least one injection point 8, in the zone of the recess 7 concerned which is closest to the pivot axis D. After filling the mold, the hardening of the mold is carried out. injection material according to the process specific to this material, polymerization, sintering, or other. The mold is opened after the injection material has hardened. If necessary, a resumption by grinding and / or diamond coating, or the like, of the surfaces of revolution and in particular of the pivots and / or shanks that comprises the shaved part 2. When the component 1 is not limited to the shaved part 2, and comprises at least one added element such as a rim 4 and / or a plate 40, and / or peg or the like, we returns each such element on the tree part and it is immobilized by gluing or the like. More particularly but without limitation, this immobilization is irreversible.

L'invention permet ainsi de réaliser un composant d'horlogerie, et en particulier un mobile d'horlogerie, avec une forme précise et des surfaces de révolution par injection de matériau dans un moule en au moins deux parties. Ce matériau peut en particulier être une céramique amagnétique. Le procédé d'obtention permet une économie de matière en raison d'une réalisation sensiblement aux cotes finies, et une importante économie d'usinage. Un tel procédé d'injection garantit aussi un bon équilibrage direct de la partie arbrée. Les finitions sont réduites au minimum, et, selon la fonction du composant 1, peuvent même être superflues.The invention thus makes it possible to produce a timepiece component, and in particular a timepiece mobile, with a precise shape and surfaces of revolution by injecting material into a mold in at least two parts. This material can in particular be a non-magnetic ceramic. The production process allows a saving in material due to a production substantially at finished dimensions, and a significant saving in machining. Such an injection process also guarantees good direct balancing of the shaved part. The finishes are kept to a minimum, and, depending on the function of component 1, may even be superfluous.

Claims (23)

  1. Timepiece component (1) comprising a shaft-like portion (2) including at least one pivot (3) about a pivot axis (D), wherein at least the constituent material of said shaft-like portion (2) is a ceramic, and where said shaft-like portion (2) includes a plurality of recesses (7) evenly arranged around said pivot axis (D), and has its centre of inertia on said pivot axis (D), characterised in that at least one said recess (7) contains an injection point (8) for said material.
  2. Component (1) according to claim 1, characterised in that said shaft-like portion (2) includes a collar (9) forming its largest diameter with respect to said pivot axis (D), which collar (9) includes a parting line (90) of said shaft-like portion (2), which parting line (90) is substantially perpendicular to said pivot axis (D).
  3. Component (1) according to claim 2, characterised in that said recesses (7) pass right through said collar (9).
  4. Component (1) according to claims 1 to 3, characterised in that said injection point (8) is located in the area of said recess (7) which is closest to said pivot axis (D).
  5. Component (1) according to one of claims 1 to 4, characterised in that said component (1) includes at least one injection point (8) in a non-functional part of said shaft-like portion (2), or in another non-functional part of said component (1) made with said shaft-like portion (2) and from the same material.
  6. Component (1) according to one of claims 1 to 5, characterised in that said shaft-like portion (2) includes, for supporting a rim (4) or a roller (40) included in said component (1), at least one shoulder (5; 6) of revolution about said pivot axis (D) adjacent to at least one support surface (50; 60) of revolution about said pivot axis (D).
  7. Component (1) according to claims 2 and 6, characterised in that said shaft-like portion (2) includes, on either side of said collar (9), a first and second said shoulders (5; 6), and a first and second said support surfaces (50; 60).
  8. Component (1) according to claim 6 or 7, characterised in that said shoulder (5; 6) is cylindrical.
  9. Component (1) according to one of claims 6 or 7, characterised in that said second support surface (50; 60) is conical or planar.
  10. Component (1) according to one of claims 1 to 9, characterised in that said material is a ceramic containing at least a first element chosen from among aluminium oxide, zirconium oxide, silicon oxide, silicon nitride, silicon carbide, carbide, boron carbide, titanium diboride TiB2, diamond, tungsten carbide and vitreous silica.
  11. Component (1) according to claim 10, characterised in that said ceramic contains at least one additive chosen from among MgO, CaO, Y2O3, carbon, carbon fibres, carbon nanotubes, coloured pigments, electrets.
  12. Component (1) according to one of claims 1 to 11, characterised in that said material is a ceramic made of zirconium oxide ZrO2 with an yttrium oxide Y2O3 dopant.
  13. Component (1) according to one of claims 1 to 12, characterised in that said ceramic is completely non-magnetic.
  14. Component (1) according to one of claims 1 to 13, characterised in that said ceramic is filled with magnetised and/or magnetisable particles.
  15. Component (1) according to one of claims 1 to 14, characterised in that said component (1) is a balance, and carries, on said shaft-like portion (2), at least one rim (4) and one roller (40).
  16. Timepiece oscillator (100) including at least one component (1) according to one of claims 1 to 15.
  17. Timepiece movement (200) including at least one oscillator (100) according to claim 16, and/or at least one component (1) according to one of claims 1 to 15.
  18. Timepiece (1000) including at least one movement (200) according to claim 17 and/or at least one oscillator (100) according to claim 16, and/or at least one component (1) according to one of claims 1 to 15.
  19. Timepiece (1000) according to claim 18, characterised in that it is a watch.
  20. Method for making a timepiece component (1) according to one of claims 1 to 15 including a shaft-like portion (2), which includes at least one pivot (3) about a pivot axis (D), characterised in that said shaft-like portion (2) is made by injecting a ceramic or similar type material into a mould having at least two parts and arranged to directly produce surfaces of revolution on each said pivot (3), and, after filling said mould, the injection material is hardened according to the process specific to said material, then the mould is opened once the injection material has hardened, and, when said component (1) is not limited to said shaft-like portion (2), and includes at least one added element, each said element is placed on said shaft-like portion (2) on which it is immobilised.
  21. Method according to claim 20, characterised in that, after opening the mould, finish machining is carried out by grinding and/or diamond polishing the shoulders of revolution and notably said pivots (3) and/or pivot shanks included in said shaft-like portion (2),
  22. Method according to claim 20 or 21, characterised in that a said mould is used which includes at least two mould portions aligned on said pivot axis (D), and which extend on either side of a parting line on which lies the area of largest diameter of said shaft-like portion (2), which area of largest diameter defines a collar (9).
  23. Method according to claim 22, characterised in that said material is injected into the mould at at least one injection point (8) arranged inside at least one recess (7) included in said collar (9).
EP18182666.0A 2018-07-10 2018-07-10 Timepiece component with ceramic non-magnetic arboured portion Active EP3594757B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP18182666.0A EP3594757B1 (en) 2018-07-10 2018-07-10 Timepiece component with ceramic non-magnetic arboured portion
US16/436,987 US11500333B2 (en) 2018-07-10 2019-06-11 Timepiece component with a non-magnetic shaft-like portion made of ceramic
JP2019118231A JP6847165B2 (en) 2018-07-10 2019-06-26 Timekeeper component with non-magnetic shaft-like parts made from ceramic
CN201910619300.0A CN110703579B (en) 2018-07-10 2019-07-10 Timepiece component with a non-magnetic shaft made of ceramic

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18182666.0A EP3594757B1 (en) 2018-07-10 2018-07-10 Timepiece component with ceramic non-magnetic arboured portion

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EP3594757A1 EP3594757A1 (en) 2020-01-15
EP3594757B1 true EP3594757B1 (en) 2021-05-26

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US (1) US11500333B2 (en)
EP (1) EP3594757B1 (en)
JP (1) JP6847165B2 (en)
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Publication number Priority date Publication date Assignee Title
WO2024074517A1 (en) 2022-10-03 2024-04-11 Rolex Sa Timepiece staff

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1438887A (en) * 1965-07-03 1966-05-13 Tissot Horlogerie Device for fixing one end of a hairspring regulating a clockwork movement to a connecting member
CH835174A4 (en) 1974-06-18 1977-03-31
JPS5463852U (en) 1977-10-14 1979-05-07
CN1014553B (en) * 1987-07-21 1991-10-30 精工爱普生株式会社 Time wheel and making method thereof
US6755566B2 (en) * 2001-02-15 2004-06-29 Konrad Damasko Clockwork
CH700154B1 (en) * 2008-12-24 2014-03-14 Complitime Sa Timepiece including a pivot member.
CN202093328U (en) 2010-12-10 2011-12-28 北京晶莱陶瓷制品有限公司 Watch ceramic frame
JP2014190816A (en) * 2013-03-27 2014-10-06 Citizen Holdings Co Ltd Spring device for timepiece
CN103265287B (en) 2013-05-23 2015-02-04 潮州三环（集团）股份有限公司 Ceramic wristwatch dial and manufacturing method thereof
JP6530481B2 (en) 2014-04-04 2019-06-12 ロレックス・ソシエテ・アノニムＲｏｌｅｘ Ｓａ Method of manufacturing watch parts having inserts made of composite material, watch parts, and watch
EP4177677A1 (en) 2016-06-13 2023-05-10 Rolex Sa Clock axis

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JP2020008572A (en) 2020-01-16
CN110703579B (en) 2021-08-20
JP6847165B2 (en) 2021-03-24
US11500333B2 (en) 2022-11-15
US20200019119A1 (en) 2020-01-16
EP3594757A1 (en) 2020-01-15
CN110703579A (en) 2020-01-17

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