EP3382470A1 - Timepiece oscillator with a flexible pivot - Google Patents

Timepiece oscillator with a flexible pivot Download PDF

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Publication number
EP3382470A1
EP3382470A1 EP17163684.8A EP17163684A EP3382470A1 EP 3382470 A1 EP3382470 A1 EP 3382470A1 EP 17163684 A EP17163684 A EP 17163684A EP 3382470 A1 EP3382470 A1 EP 3382470A1
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EP
European Patent Office
Prior art keywords
blades
serge
oscillator
support
pair
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Granted
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EP17163684.8A
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German (de)
French (fr)
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EP3382470B1 (en
Inventor
David Chabloz
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Patek Philippe SA Geneve
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Patek Philippe SA Geneve
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    • 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
    • G04B17/045—Oscillators acting by spring tension with oscillating blade springs
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B31/00—Bearings; Point suspensions or counter-point suspensions; Pivot bearings; Single parts therefor
    • G04B31/02—Shock-damping bearings

Definitions

  • the present invention relates to a clock oscillator that can serve as a time base in a mechanical watch movement.
  • the present invention relates to a clock oscillator flexible pivot, that is to say, an oscillator comprising a serge guided in rotation not by a physical axis but by elastic blades that connect the serge to a support and which define a virtual axis of rotation.
  • the flexible pivot used in the present invention is of the type with separate crossed blades: the blades which connect the serge to the support extend in different parallel planes and intersect without contact.
  • the object of the present invention is to provide a split-blade clock oscillator whose impact resistance is improved while allowing the oscillator to have a frequency independent of the positions of the watch and the amplitude of oscillation or, alternatively, to have a desired anisochronism to compensate for a defect provided for example by the exhaust.
  • a clock oscillator comprising a serge, a support and a flexible pivot connecting the serge to the support for guiding the serge in rotation relative to the support around a virtual axis of rotation, the flexible pivot being arranged for resiliently biasing the serge to a rest position, characterized in that the flexible pivot comprises a first pair of blades constituted by first and second resilient blades which extend into first and second parallel planes and which intersect without contact and a second pair of blades constituted by third and fourth resilient blades which extend into third and fourth planes parallel to the first and second planes and which intersect without contact, and in that in plan view from above and when the serge is in its rest position, the first pair of blades and the second pair of blades are symmetrical with respect to the center of rotation of the s erge and the point of intersection of the first and second resilient blades is offset from the point of intersection of the third and fourth resilient blades.
  • the present invention further provides a watch movement and a watch comprising the oscillator as defined above.
  • a clock oscillator 1 for a mechanical watch movement intended to be part of a watch such as a wristwatch or a pocket watch, comprises a support 2, a serge 3 and a flexible pivot 4 formed of elastic blades 4a to 4d.
  • the serge 3 is typically in the form of a closed ring, as shown.
  • the support 2 is in two parts, namely a first part 2a and a second part 2b.
  • the support 2 is intended to be fixed on a fixed or movable support of the movement, typically on the frame of the movement.
  • the two parts 2a, 2b of the support 2 are located in the opening defined by the serge 3, diametrically opposite.
  • the elastic blades 4a to 4d connect the support 2 to the serge 3, the latter being held only by the blades 4a to 4d.
  • the elastic blades 4a to 4d are four in number. They guide the serge 3 in rotation around a virtual axis of rotation A and tend to recall the serge 3 to a rest position (equilibrium position) during its oscillations around the axis A.
  • the elastic blades 4a to 4d extend respectively in four different planes which are parallel to the plane of the serge 3 and perpendicular to the virtual axis of rotation A.
  • the elastic blades 4a to 4d more particularly comprise first and second blades 4a, 4b which intersect without contact and third and fourth blades 4c, 4d which intersect without contact.
  • first and second blades 4a, 4b more precisely their neutral fibers, intersect at a cross point P1 and the third and fourth blades 4c, 4d, more precisely their neutral fibers, intersect at a cross point P2.
  • the first and second blades 4a, 4b extend from the first portion 2a of the support 2 to the inner face of the serge 3.
  • the third and fourth blades 4c, 4d extend from the second portion 2b of the support 2 to the face
  • the first blade 4a is between the third and second blades 4c, 4b and the second blade 4b is between the first and fourth blades 4a, 4d in the vertical (axial) direction.
  • the order of the blades 4a to 4d could however be different.
  • the oscillator 1 is preferably constituted of two monolithic assemblies superimposed and assembled.
  • a first monolithic assembly comprises a first half 3a of the serge 3, a sub-part 2a 'of the first part 2a of the support 2, a sub-part 2b' of the second part 2b of the support 2 and the first and third blades 4a , 4c.
  • a second monolithic assembly comprises a second half 3b of the serge 3, another sub-part 2a "of the first part 2a of the support 2, another sub-part 2b" of the second part 2b of the support 2 and the second and fourth blades 4b, 4d.
  • the two sub-parts 2a ', 2a "of the first part 2a of the support 2 are fixed to each other, as well as the two sub-parts 2b', 2b" of the second part 2b of the support 2 and the two halves 3a, 3b of the serge 3.
  • the assembly is carried out for example by welding, brazing or gluing, preferably by thermocompression bonding (thermocompression bonding), eutectic bonding or polymer bonding.
  • the oscillator 1 is entirely monolithic.
  • Oscillator 1 when it is entirely monolithic, or each monolithic assembly 3a, 2a ', 2b', 4a, 4c and 3b, 2a ", 2b", 4b, 4d is made for example of silicon or of any other material suitable for the Deep Reactive Ion Etching (DRIE) technique, in nickel, nickel alloy or any other suitable material according to the LIGA technique (lithography, electroplating, molding), steel, copper-beryllium, nickel-silver or other metal alloy by milling, spark erosion or 3D printing, in glass, metallic glass, sapphire or any other suitable material according to the technique of laser micro-structuring coupled with chemical etching.
  • DRIE Deep Reactive Ion Etching
  • the pair of blades constituted by the first and second blades 4a, 4b and the pair of blades constituted by the third and fourth blades 4c, 4d are symmetrical to each other in planar view from above ( figures 2 and 3 ) relative to the center of rotation O (corresponding to the virtual axis of rotation A) of the serge 3 when the serge 3 is in its rest position.
  • the center of rotation O is also the center of mass of the serge 3.
  • the center of rotation O is located midway between the cross points P1, P2.
  • the pairs of blades 4a, 4b and 4c, 4d are further symmetrical to each other in plan view from above with respect to a line D passing through the center of rotation O of the serge 3 when the serge 3 is in its rest position, as shown in FIGS. figures 2 and 3 .
  • This symmetrical arrangement also makes the frequency of the oscillator 1 substantially independent of the orientation of the watch relative to the gravitational field, whatever the position of the cross points P1 and P2 (at least in a wide range).
  • the diagram of the figure 4 shows the maximum deviation between the different reference orientations of the oscillator 1 with respect to the gravity as a function of the position, as a percentage of the length of each blade 4a to 4d measured from its junction point to the support 2, cross points P1, P2. It can be seen that this deviation is substantially zero at least for positions of cross points P1 and P2 between 10 and 30%.
  • the elastic blades can therefore intersect at positions different from that (12.7%) of a Wittrick-type oscillator, in particular at positions that are greater than or even greater than 12.7%, which will make it possible to increase the amplitude of the oscillator. oscillation and / or decrease the diameter of the serge 3.
  • the pair of blades 4a, 4b and the pair of blades 4c, 4d are offset in plan view from above so that the cross points P1, P2 are also offset.
  • This offset of the crossing points P1, P2 makes it possible to make the oscillator 1 substantially isochronous, or to obtain a desired anisochronism compensating for an isochronism defect provided by another component of the watch movement such as the escapement.
  • anisochronism is understood to mean the variations of the frequency as a function of the oscillation amplitude of the oscillator 1. The smaller these variations, the more oscillator 1 is close to isochronism.
  • FIG. 5 An example of an isochronism curve is shown in figure 5 .
  • the curve of the figure 5 represents the step M, in seconds / day, of the oscillator 1 between an amplitude of oscillation of 20 ° and an amplitude of oscillation of 2 ° as a function of the distance d, in ⁇ m and in plan view from above, between the crossing points P1, P2.
  • the offset between the cross points P1, P2, in plan view from above and when the serge 3 is in its rest position is preferably at least 1 ⁇ m, preferably at least 1.2 ⁇ m, preferably at least 1.5 ⁇ m, preferably at least 2 ⁇ m, preferably at least 3 ⁇ m, preferably at least 4 ⁇ m, preferably at least less than 5 ⁇ m, preferably at least 6 ⁇ m, preferably at least 7 ⁇ m, preferably at least 8 ⁇ m, preferably at least 9 ⁇ m, preferably at least 10 ⁇ m, preferably at least 15 ⁇ m, preferably at least 20 ⁇ m.
  • the angle ⁇ between the first and second blades 4a, 4b, respectively between the third and fourth blades 4c, 4d, in plan view from above and when the serge 3 is in its rest position, is typically between 30 ° and 150 °. °, preferably between 60 ° and 120 °, preferably between 80 ° and 100 ° and preferably equal to 90 °.
  • the 90 ° angle is optimum in terms of impact resistance and independence of the frequency with respect to the orientation of the watch. In the present invention the angle ⁇ has little influence on isochronism.
  • the oscillator designated by 1 "
  • the oscillator is arranged to allow an adjustment of the position of the crossing points P1, P2 in order to optimize the isochronism (zero running between oscillation amplitudes of 20 ° and 2 °, cf. figure 5 ) despite manufacturing tolerances.
  • the part 2a of the support 2 from which extend the first and second blades 4a, 4b is in two subparts 2 1 , 2 2 connected by an elastic member 2 3 and thus movable relative to each other.
  • the portion 2b of the support 2 from which extend the third and fourth blades 4c, 4d is into two sub-parts 2 4, 2 5 mobile relative to each other and fixed respectively to the two sub-parts 2 1 , 2 2 of the part 2a of the support 2.
  • the order of the blades 4a to 4d in the vertical direction is different from that of the embodiment illustrated in FIGS.
  • the elastic member 23 is a guide member designed to allow a displacement of the sub-parts 2 1 , 2 2 of the portion 2a of the support 2 only in translation. In a variant, it could be designed to allow displacement of the sub-parts 2 1 , 2 2 only in rotation. It could also be deleted.
  • the support 2 can be mounted on an adjustment device.
  • the adjustment device is for example eccentric or micrometer screw associated (e) a slider or a flexible linear guide system.
  • An example of such an adjustment device is illustrated in FIG. figure 8 . It comprises a slider 5 guided in a groove 6 of a support 7 fixed on the frame of the watch movement. The position of the slider 5 in the groove 6 can be adjusted by an eccentric 8.
  • a return spring 9 holds the slider 5 in abutment against the eccentric 8.
  • the slider 5 carries a pin 10 engaged in one or more aligned holes 12 of the sub-parts 2 1 , 2 4 of the support 2.
  • the support 7 carries another pin 11 engaged in one or more aligned holes 13 of the sub-parts 2 2 , 2 5 of the support 2.
  • the assembly of the parts 2a, 2b of the support 2 is such that the symmetry of the pairs of blades 4a, 4b and 4c, 4d is retained after adjustment.
  • the respective positions of the crossing points P1, P2 are set simultaneously and symmetrically.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Clocks (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)

Abstract

L'oscillateur d'horlogerie (1) comprend une serge (3), un support (2) et un pivot flexible (4) reliant la serge (3) au support (2) pour guider la serge (3) en rotation par rapport au support (2) autour d'un axe de rotation virtuel (A). Le pivot flexible (4) est agencé pour rappeler élastiquement la serge (3) vers une position de repos. Le pivot flexible (4) comprend une première paire de lames constituée par des première et deuxième lames élastiques (4a, 4b) qui s'étendent dans des premier et deuxième plans parallèles et qui se croisent sans contact et une deuxième paire de lames constituée par des troisième et quatrième lames élastiques (4c, 4d) qui s'étendent dans des troisième et quatrième plans parallèles aux premier et deuxième plans et qui se croisent sans contact. En vue plane de dessus et lorsque la serge (3) est dans sa position de repos, la première paire de lames (4a, 4b) et la deuxième paire de lames (4c, 4d) sont symétriques par rapport au centre de rotation (O) de la serge (3) et le point de croisement (P1) des première et deuxième lames élastiques (4a, 4b) est décalé par rapport au point de croisement (P2) des troisième et quatrième lames élastiques (4c, 4d).

Figure imgaf001
The clock oscillator (1) comprises a serge (3), a support (2) and a flexible pivot (4) connecting the serge (3) to the support (2) to guide the serge (3) in rotation relative to to the support (2) around a virtual axis of rotation (A). The flexible pivot (4) is arranged to resiliently return the serge (3) to a rest position. The flexible pivot (4) comprises a first pair of blades constituted by first and second resilient blades (4a, 4b) which extend in first and second parallel planes and which intersect without contact and a second pair of blades constituted by third and fourth resilient blades (4c, 4d) extending in third and fourth planes parallel to the first and second planes and intersecting without contact. In plan view from above and when the serge (3) is in its rest position, the first pair of blades (4a, 4b) and the second pair of blades (4c, 4d) are symmetrical with respect to the center of rotation (O ) of the serge (3) and the point of intersection (P1) of the first and second resilient blades (4a, 4b) is offset from the point of intersection (P2) of the third and fourth resilient blades (4c, 4d).
Figure imgaf001

Description

La présente invention concerne un oscillateur d'horlogerie pouvant servir de base de temps dans un mouvement horloger mécanique.The present invention relates to a clock oscillator that can serve as a time base in a mechanical watch movement.

Plus particulièrement, la présente invention concerne un oscillateur d'horlogerie à pivot flexible, c'est-à-dire un oscillateur comprenant une serge guidée en rotation non pas par un axe physique mais par des lames élastiques qui relient la serge à un support et qui définissent un axe de rotation virtuel.More particularly, the present invention relates to a clock oscillator flexible pivot, that is to say, an oscillator comprising a serge guided in rotation not by a physical axis but by elastic blades that connect the serge to a support and which define a virtual axis of rotation.

Le pivot flexible utilisé dans la présente invention est du type à lames croisées séparées : les lames qui relient la serge au support s'étendent dans des plans parallèles différents et se croisent sans contact.The flexible pivot used in the present invention is of the type with separate crossed blades: the blades which connect the serge to the support extend in different parallel planes and intersect without contact.

Des oscillateurs d'horlogerie à lames croisées séparées sont décrits dans les demandes de brevet EP 2 911 012 et WO 2016/096677 . Dans l'oscillateur selon EP 2 911 012 les lames se croisent aux 7/8ème de leur longueur conformément à la théorie développée par W.H. Wittrick. Ce croisement des lames aux 7/8ème de leur longueur a pour effet de minimiser les déplacements de l'axe de rotation virtuel et donc de rendre la fréquence de l'oscillateur indépendante de l'orientation de la montre par rapport à la gravité. La demande de brevet WO 2016/096677 enseigne quant à elle qu'avec un angle entre les lames élastiques compris entre 68° et 76°, et de préférence égal à 71,2°, le moment résultant de l'action des lames peut être linéaire en fonction de l'angle de rotation de la serge, rendant ainsi la fréquence de l'oscillateur indépendante de l'amplitude d'oscillation (isochronisme).Separate crossed-blade watch oscillators are described in the EP Patent 2,911,012 and WO 2016/096677 . In the oscillator according to EP 2,911,012 the blades intersect at 7/8 th of their length according to the theory developed by WH Wittrick. This intersection of the blades to 7/8 th of their length has the effect of minimizing the movements of the virtual axis of rotation and thus to make the frequency of the oscillator independent of the orientation of the watch relative to gravity. The patent application WO 2016/096677 teaches that with an angle between the elastic blades between 68 ° and 76 °, and preferably equal to 71.2 °, the moment resulting from the action of the blades can be linear depending on the angle of rotation of the serge, thus making the frequency of the oscillator independent of the amplitude of oscillation (isochronism).

Ces oscillateurs présentent l'inconvénient d'une faible tenue aux chocs, la serge ayant tendance à pivoter autour d'un axe parallèle à son plan lors de chocs verticaux.These oscillators have the disadvantage of a low impact resistance, the serge tending to pivot about an axis parallel to its plane during vertical shocks.

La présente invention vise à proposer un oscillateur d'horlogerie à lames croisées séparées dont la tenue aux chocs est améliorée tout en permettant à l'oscillateur d'avoir une fréquence indépendante des positions de la montre et de l'amplitude d'oscillation ou, en variante, d'avoir un anisochronisme souhaité pour compenser un défaut apporté par exemple par l'échappement.The object of the present invention is to provide a split-blade clock oscillator whose impact resistance is improved while allowing the oscillator to have a frequency independent of the positions of the watch and the amplitude of oscillation or, alternatively, to have a desired anisochronism to compensate for a defect provided for example by the exhaust.

A cette fin il est proposé un oscillateur d'horlogerie comprenant une serge, un support et un pivot flexible reliant la serge au support pour guider la serge en rotation par rapport au support autour d'un axe de rotation virtuel, le pivot flexible étant agencé pour rappeler élastiquement la serge vers une position de repos, caractérisé en ce que le pivot flexible comprend une première paire de lames constituée par des première et deuxième lames élastiques qui s'étendent dans des premier et deuxième plans parallèles et qui se croisent sans contact et une deuxième paire de lames constituée par des troisième et quatrième lames élastiques qui s'étendent dans des troisième et quatrième plans parallèles aux premier et deuxième plans et qui se croisent sans contact, et en ce que, en vue plane de dessus et lorsque la serge est dans sa position de repos, la première paire de lames et la deuxième paire de lames sont symétriques par rapport au centre de rotation de la serge et le point de croisement des première et deuxième lames élastiques est décalé par rapport au point de croisement des troisième et quatrième lames élastiques.For this purpose there is provided a clock oscillator comprising a serge, a support and a flexible pivot connecting the serge to the support for guiding the serge in rotation relative to the support around a virtual axis of rotation, the flexible pivot being arranged for resiliently biasing the serge to a rest position, characterized in that the flexible pivot comprises a first pair of blades constituted by first and second resilient blades which extend into first and second parallel planes and which intersect without contact and a second pair of blades constituted by third and fourth resilient blades which extend into third and fourth planes parallel to the first and second planes and which intersect without contact, and in that in plan view from above and when the serge is in its rest position, the first pair of blades and the second pair of blades are symmetrical with respect to the center of rotation of the s erge and the point of intersection of the first and second resilient blades is offset from the point of intersection of the third and fourth resilient blades.

La présente invention propose en outre un mouvement horloger et une montre comprenant l'oscillateur tel que défini ci-dessus.The present invention further provides a watch movement and a watch comprising the oscillator as defined above.

D'autres caractéristiques et avantages de la présente invention apparaîtront à la lecture de la description détaillée suivante faite en référence aux dessins annexés dans lesquels :

  • les figures 1 et 2 sont respectivement une vue en perspective et une vue plane de dessus d'un oscillateur d'horlogerie selon un premier mode de réalisation de l'invention ;
  • la figure 3 est une vue plane de dessus d'une zone centrale de l'oscillateur d'horlogerie selon le premier mode de réalisation ;
  • la figure 4 est un diagramme montrant l'écart de marche maximum entre les différentes positions de référence de l'oscillateur d'horlogerie par rapport à la force gravitationnelle en fonction de la position de points de croisement de lames élastiques de l'oscillateur ;
  • la figure 5 est un diagramme montrant la marche de l'oscillateur d'horlogerie entre des amplitudes d'oscillation de 20° et de 2° en fonction de la distance, en vue plane de dessus, entre lesdits points de croisement ;
  • la figure 6 est un dessin schématique montrant un oscillateur d'horlogerie selon un deuxième mode de réalisation de l'invention ;
  • la figure 7 est une vue en perspective d'un oscillateur d'horlogerie selon un troisième mode de réalisation de l'invention ; et
  • la figure 8 est une vue en perspective d'un dispositif de réglage sur lequel peut être monté l'oscillateur d'horlogerie selon le troisième mode de réalisation de l'invention.
Other features and advantages of the present invention will appear on reading the following detailed description given with reference to the accompanying drawings in which:
  • the Figures 1 and 2 are respectively a perspective view and a plan view from above of a clock oscillator according to a first embodiment of the invention;
  • the figure 3 is a plan view from above of a central zone of the watch oscillator according to the first embodiment;
  • the figure 4 is a diagram showing the maximum operating gap between the different reference positions of the watch oscillator by relation to the gravitational force as a function of the position of cross points of elastic blades of the oscillator;
  • the figure 5 is a diagram showing the operation of the clock oscillator between oscillation amplitudes of 20 ° and 2 ° as a function of the distance, in plan view from above, between said crossing points;
  • the figure 6 is a schematic drawing showing a clock oscillator according to a second embodiment of the invention;
  • the figure 7 is a perspective view of a watch oscillator according to a third embodiment of the invention; and
  • the figure 8 is a perspective view of a setting device on which can be mounted the clock oscillator according to the third embodiment of the invention.

En référence aux figures 1 et 2, un oscillateur d'horlogerie 1 selon l'invention, pour un mouvement horloger mécanique destiné à faire partie d'une montre telle qu'une montre-bracelet ou une montre de poche, comprend un support 2, une serge 3 et un pivot flexible 4 formé de lames élastiques 4a à 4d.With reference to Figures 1 and 2 , a clock oscillator 1 according to the invention, for a mechanical watch movement intended to be part of a watch such as a wristwatch or a pocket watch, comprises a support 2, a serge 3 and a flexible pivot 4 formed of elastic blades 4a to 4d.

La serge 3 est typiquement sous la forme d'un anneau fermé, comme représenté.The serge 3 is typically in the form of a closed ring, as shown.

Le support 2 est en deux parties, à savoir une première partie 2a et une deuxième partie 2b. Le support 2 est destiné à être fixé sur un support fixe ou mobile du mouvement, typiquement sur le bâti du mouvement. Les deux parties 2a, 2b du support 2 sont situées dans l'ouverture définie par la serge 3, de manière diamétralement opposée.The support 2 is in two parts, namely a first part 2a and a second part 2b. The support 2 is intended to be fixed on a fixed or movable support of the movement, typically on the frame of the movement. The two parts 2a, 2b of the support 2 are located in the opening defined by the serge 3, diametrically opposite.

Les lames élastiques 4a à 4d relient le support 2 à la serge 3, cette dernière étant tenue uniquement par les lames 4a à 4d. Les lames élastiques 4a à 4d sont au nombre de quatre. Elles guident la serge 3 en rotation autour d'un axe de rotation virtuel A et tendent à rappeler la serge 3 vers une position de repos (position d'équilibre) pendant ses oscillations autour de l'axe A. Les lames élastiques 4a à 4d s'étendent respectivement dans quatre plans différents qui sont parallèles au plan de la serge 3 et perpendiculaires à l'axe de rotation virtuel A.The elastic blades 4a to 4d connect the support 2 to the serge 3, the latter being held only by the blades 4a to 4d. The elastic blades 4a to 4d are four in number. They guide the serge 3 in rotation around a virtual axis of rotation A and tend to recall the serge 3 to a rest position (equilibrium position) during its oscillations around the axis A. The elastic blades 4a to 4d extend respectively in four different planes which are parallel to the plane of the serge 3 and perpendicular to the virtual axis of rotation A.

Les lames élastiques 4a à 4d comprennent plus particulièrement des première et deuxième lames 4a, 4b qui se croisent sans contact et des troisième et quatrième lames 4c, 4d qui se croisent sans contact. En vue plane de dessus (figures 2 et 3) les première et deuxième lames 4a, 4b, plus précisément leurs fibres neutres, se croisent en un point de croisement P1 et les troisième et quatrième lames 4c, 4d, plus précisément leurs fibres neutres, se croisent en un point de croisement P2. Les première et deuxième lames 4a, 4b s'étendent de la première partie 2a du support 2 à la face intérieure de la serge 3. Les troisième et quatrième lames 4c, 4d s'étendent de la deuxième partie 2b du support 2 à la face intérieure de la serge 3. Dans l'exemple illustré, la première lame 4a est entre les troisième et deuxième lames 4c, 4b et la deuxième lame 4b est entre les première et quatrième lames 4a, 4d dans la direction verticale (axiale). L'ordre des lames 4a à 4d pourrait toutefois être différent.The elastic blades 4a to 4d more particularly comprise first and second blades 4a, 4b which intersect without contact and third and fourth blades 4c, 4d which intersect without contact. In plan view from above ( figures 2 and 3 ) the first and second blades 4a, 4b, more precisely their neutral fibers, intersect at a cross point P1 and the third and fourth blades 4c, 4d, more precisely their neutral fibers, intersect at a cross point P2. The first and second blades 4a, 4b extend from the first portion 2a of the support 2 to the inner face of the serge 3. The third and fourth blades 4c, 4d extend from the second portion 2b of the support 2 to the face In the illustrated example, the first blade 4a is between the third and second blades 4c, 4b and the second blade 4b is between the first and fourth blades 4a, 4d in the vertical (axial) direction. The order of the blades 4a to 4d could however be different.

L'oscillateur 1 est de préférence constitué de deux ensembles monolithiques superposés et assemblés. Un premier ensemble monolithique comprend une première moitié 3a de la serge 3, une sous-partie 2a' de la première partie 2a du support 2, une sous-partie 2b' de la deuxième partie 2b du support 2 et les première et troisième lames 4a, 4c. Un deuxième ensemble monolithique comprend une deuxième moitié 3b de la serge 3, une autre sous-partie 2a" de la première partie 2a du support 2, une autre sous-partie 2b" de la deuxième partie 2b du support 2 et les deuxième et quatrième lames 4b, 4d. Après avoir superposé les deux ensembles monolithiques, les deux sous-parties 2a', 2a" de la première partie 2a du support 2 sont fixées l'une à l'autre, de même que les deux sous-parties 2b', 2b" de la deuxième partie 2b du support 2 et que les deux moitiés 3a, 3b de la serge 3. L'assemblage est réalisé par exemple par soudage, brasage ou collage, de préférence par un soudage par thermocompression (thermocompression bonding), un soudage eutectique (eutectic bonding) ou une liaison polymère (polymer bonding). Dans une variante, l'oscillateur 1 est entièrement monolithique.The oscillator 1 is preferably constituted of two monolithic assemblies superimposed and assembled. A first monolithic assembly comprises a first half 3a of the serge 3, a sub-part 2a 'of the first part 2a of the support 2, a sub-part 2b' of the second part 2b of the support 2 and the first and third blades 4a , 4c. A second monolithic assembly comprises a second half 3b of the serge 3, another sub-part 2a "of the first part 2a of the support 2, another sub-part 2b" of the second part 2b of the support 2 and the second and fourth blades 4b, 4d. After having superimposed the two monolithic assemblies, the two sub-parts 2a ', 2a "of the first part 2a of the support 2 are fixed to each other, as well as the two sub-parts 2b', 2b" of the second part 2b of the support 2 and the two halves 3a, 3b of the serge 3. The assembly is carried out for example by welding, brazing or gluing, preferably by thermocompression bonding (thermocompression bonding), eutectic bonding or polymer bonding. In a variant, the oscillator 1 is entirely monolithic.

L'oscillateur 1, lorsqu'il est entièrement monolithique, ou chaque ensemble monolithique 3a, 2a', 2b', 4a, 4c et 3b, 2a", 2b", 4b, 4d est réalisé par exemple en silicium ou dans toute autre matière appropriée selon la technique de gravure ionique réactive profonde dite « DRIE » (Deep Reactive Ion Etching), en nickel, alliage de nickel ou toute autre matière appropriée selon la technique LIGA (lithographie, galvanoplastie, moulage), en acier, cuivre-béryllium, maillechort ou autre alliage métallique par fraisage, par électroérosion ou par impression 3D, en verre métallique par moulage, en verre, saphir ou toute autre matière appropriée selon la technique de micro-structuration laser couplée à une attaque chimique.Oscillator 1, when it is entirely monolithic, or each monolithic assembly 3a, 2a ', 2b', 4a, 4c and 3b, 2a ", 2b", 4b, 4d is made for example of silicon or of any other material suitable for the Deep Reactive Ion Etching (DRIE) technique, in nickel, nickel alloy or any other suitable material according to the LIGA technique (lithography, electroplating, molding), steel, copper-beryllium, nickel-silver or other metal alloy by milling, spark erosion or 3D printing, in glass, metallic glass, sapphire or any other suitable material according to the technique of laser micro-structuring coupled with chemical etching.

Conformément à l'invention, la paire de lames constituée par les première et deuxième lames 4a, 4b et la paire de lames constituée par les troisième et quatrième lames 4c, 4d sont symétriques l'une de l'autre en vue plane de dessus (figures 2 et 3) par rapport au centre de rotation O (correspondant à l'axe de rotation virtuel A) de la serge 3 lorsque la serge 3 est dans sa position de repos. De préférence le centre de rotation O est aussi le centre de masse de la serge 3. Le centre de rotation O est situé à mi-distance entre les points de croisement P1, P2. De préférence, les paires de lames 4a, 4b et 4c, 4d sont en outre symétriques l'une de l'autre en vue plane de dessus par rapport à une droite D passant par le centre de rotation O de la serge 3 lorsque la serge 3 est dans sa position de repos, comme illustré aux figures 2 et 3.According to the invention, the pair of blades constituted by the first and second blades 4a, 4b and the pair of blades constituted by the third and fourth blades 4c, 4d are symmetrical to each other in planar view from above ( figures 2 and 3 ) relative to the center of rotation O (corresponding to the virtual axis of rotation A) of the serge 3 when the serge 3 is in its rest position. Preferably the center of rotation O is also the center of mass of the serge 3. The center of rotation O is located midway between the cross points P1, P2. Preferably, the pairs of blades 4a, 4b and 4c, 4d are further symmetrical to each other in plan view from above with respect to a line D passing through the center of rotation O of the serge 3 when the serge 3 is in its rest position, as shown in FIGS. figures 2 and 3 .

Cet agencement symétrique des paires de lames 4a, 4b et 4c, 4d confère à l'oscillateur 1 une excellente tenue aux chocs en ce sens que la serge 3 aura tendance à se déplacer verticalement (dans la direction de l'axe de rotation virtuel A) en cas de choc vertical plutôt qu'en rotation autour d'un axe parallèle au plan de l'oscillateur 1. En effet, la résultante des forces appliquées à la serge 3 lors d'un choc vertical passera par le centre de masse de la serge 3, les contre-réactions des lames 4a à 4d s'exerçant de manière symétrique. La fréquence propre de l'oscillateur 1 de même que l'interaction entre l'oscillateur 1 et l'échappement du mouvement horloger seront dès lors moins perturbées.This symmetrical arrangement of the pairs of blades 4a, 4b and 4c, 4d gives the oscillator 1 excellent shock resistance in that the serge 3 will tend to move vertically (in the direction of the virtual axis of rotation A ) in the event of a vertical impact rather than in rotation about an axis parallel to the plane of the oscillator 1. Indeed, the resultant of the forces applied to the serge 3 during a vertical impact will pass through the center of mass of the serge 3, the counter-reactions of the blades 4a to 4d exerting symmetrically. The natural frequency of the oscillator 1 as well as the interaction between the oscillator 1 and the escapement of the watch movement will therefore be less disturbed.

Cet agencement symétrique rend en outre la fréquence de l'oscillateur 1 sensiblement indépendante de l'orientation de la montre par rapport au champ gravitationnel, ceci quelle que soit la position des points de croisement P1 et P2 (au moins dans une grande plage). A titre d'illustration le diagramme de la figure 4 montre l'écart de marche maximum entre les différentes orientations de référence de l'oscillateur 1 par rapport à la gravité en fonction de la position, en pourcentage de la longueur de chaque lame 4a à 4d mesurée depuis son point de jonction au support 2, des points de croisement P1, P2. On peut voir que cet écart de marche est sensiblement nul au moins pour des positions des points de croisement P1 et P2 entre 10 et 30%. Les lames élastiques peuvent donc se croiser à des positions différentes de celle (12,7%) d'un oscillateur de type Wittrick, en particulier à des positions supérieures voire très supérieures à 12,7% qui permettront d'augmenter l'amplitude d'oscillation et/ou de diminuer le diamètre de la serge 3.This symmetrical arrangement also makes the frequency of the oscillator 1 substantially independent of the orientation of the watch relative to the gravitational field, whatever the position of the cross points P1 and P2 (at least in a wide range). As an illustration the diagram of the figure 4 shows the maximum deviation between the different reference orientations of the oscillator 1 with respect to the gravity as a function of the position, as a percentage of the length of each blade 4a to 4d measured from its junction point to the support 2, cross points P1, P2. It can be seen that this deviation is substantially zero at least for positions of cross points P1 and P2 between 10 and 30%. The elastic blades can therefore intersect at positions different from that (12.7%) of a Wittrick-type oscillator, in particular at positions that are greater than or even greater than 12.7%, which will make it possible to increase the amplitude of the oscillator. oscillation and / or decrease the diameter of the serge 3.

Selon l'invention, également, la paire de lames 4a, 4b et la paire de lames 4c, 4d sont décalées en vue plane de dessus de sorte que les points de croisement P1, P2 sont eux aussi décalés. Ce décalage des points de croisement P1, P2 permet de rendre l'oscillateur 1 sensiblement isochrone, ou d'obtenir un anisochronisme souhaité compensant un défaut d'isochronisme apporté par un autre composant du mouvement horloger tel que l'échappement. Dans la présente invention on entend par « anisochronisme » les variations de la fréquence en fonction de l'amplitude d'oscillation de l'oscillateur 1. Plus ces variations sont faibles plus l'oscillateur 1 est proche de l'isochronisme.According to the invention, also, the pair of blades 4a, 4b and the pair of blades 4c, 4d are offset in plan view from above so that the cross points P1, P2 are also offset. This offset of the crossing points P1, P2 makes it possible to make the oscillator 1 substantially isochronous, or to obtain a desired anisochronism compensating for an isochronism defect provided by another component of the watch movement such as the escapement. In the present invention, "anisochronism" is understood to mean the variations of the frequency as a function of the oscillation amplitude of the oscillator 1. The smaller these variations, the more oscillator 1 is close to isochronism.

Un exemple de courbe d'isochronisme est illustré à la figure 5. La courbe de la figure 5 représente la marche M, en secondes/jour, de l'oscillateur 1 entre une amplitude d'oscillation de 20° et une amplitude d'oscillation de 2° en fonction de la distance d, en µm et en vue plane de dessus, entre les points de croisement P1, P2. La marche M est définie de la manière suivante : M = T 20 ° − T 2 ° T 20 ° .86400

Figure imgb0001
où T(20°) est la période de l'oscillateur 1 à une amplitude d'oscillation de 20° et T(2°) est la période de l'oscillateur 1 à une amplitude d'oscillation de 2°. On constate à la figure 5 qu'il existe une valeur de d, désignée par do, qui annule la marche M et qui rend donc l'oscillateur 1 isochrone. Dans l'exemple illustré, cette valeur do est égale à 26 µm. La courbe de la figure 5 a été obtenue avec des points de croisement P1, P2 situés à 30% de la longueur des lames élastiques 4a à 4d. La valeur do varie en fonction de la position de ces points de croisement P1, P2. Plus les points de croisement P1, P2 sont éloignés des points de jonction des lames correspondantes 4a à 4d au support 2, plus leur décalage doit être grand.An example of an isochronism curve is shown in figure 5 . The curve of the figure 5 represents the step M, in seconds / day, of the oscillator 1 between an amplitude of oscillation of 20 ° and an amplitude of oscillation of 2 ° as a function of the distance d, in μm and in plan view from above, between the crossing points P1, P2. The step M is defined as follows: M = T 20 ° - T 2 ° T 20 ° .86400
Figure imgb0001
 where T (20 °) is the period of oscillator 1 at an oscillation amplitude of 20 ° and T (2 °) is the period of oscillator 1 at an oscillation amplitude of 2 °. It can be seen at figure 5 that there exists a value of d, denoted by C, which cancels the step M and which thus makes the oscillator 1 isochronous. In the illustrated example, this value is equal to 26 μm. The curve of the figure 5 was obtained with cross points P1, P2 located at 30% of the length of the elastic blades 4a to 4d. The value do varies according to the position of these crossing points P1, P2. The more the crossover points P1, P2 are remote from the junction points of the corresponding blades 4a to 4d to the support 2, the larger their offset must be.

De manière générale, dans la présente invention le décalage entre les points de croisement P1, P2, en vue plane de dessus et lorsque la serge 3 est dans sa position de repos, est de préférence d'au moins 1 µm, de préférence d'au moins 1,2 µm, de préférence d'au moins 1,5 µm, de préférence d'au moins 2 µm, de préférence d'au moins 3 µm, de préférence d'au moins 4 µm, de préférence d'au moins 5 µm, de préférence d'au moins 6 µm, de préférence d'au moins 7 µm, de préférence d'au moins 8 µm, de préférence d'au moins 9 µm, de préférence d'au moins 10 µm, de préférence d'au moins 15 µm, de préférence d'au moins 20 µm.In general, in the present invention, the offset between the cross points P1, P2, in plan view from above and when the serge 3 is in its rest position, is preferably at least 1 μm, preferably at least 1.2 μm, preferably at least 1.5 μm, preferably at least 2 μm, preferably at least 3 μm, preferably at least 4 μm, preferably at least less than 5 μm, preferably at least 6 μm, preferably at least 7 μm, preferably at least 8 μm, preferably at least 9 μm, preferably at least 10 μm, preferably at least 15 μm, preferably at least 20 μm.

L'angle α entre les première et deuxième lames 4a, 4b, respectivement entre les troisième et quatrième lames 4c, 4d, en vue plane de dessus et lorsque la serge 3 est dans sa position de repos, est typiquement compris entre 30° et 150°, de préférence compris entre 60° et 120°, de préférence compris entre 80° et 100° et de préférence égal à 90°. L'angle de 90° est optimum en termes de résistance aux chocs et d'indépendance de la fréquence par rapport à l'orientation de la montre. Dans la présente invention l'angle α a peu d'influence sur l'isochronisme.The angle α between the first and second blades 4a, 4b, respectively between the third and fourth blades 4c, 4d, in plan view from above and when the serge 3 is in its rest position, is typically between 30 ° and 150 °. °, preferably between 60 ° and 120 °, preferably between 80 ° and 100 ° and preferably equal to 90 °. The 90 ° angle is optimum in terms of impact resistance and independence of the frequency with respect to the orientation of the watch. In the present invention the angle α has little influence on isochronism.

Dans l'exemple des figures 1 à 3 toute la paire de lames 4a, 4b est décalée par rapport à la paire de lames 4c, 4d. On peut cependant obtenir le décalage entre les points de croisement P1, P2 d'une autre manière, par exemple en décalant seulement une lame de la paire de lames 4a, 4b par rapport à la lame de l'autre paire de lames 4c, 4d qui lui est symétrique, comme dans l'oscillateur 1' illustré schématiquement à la figure 6. Dans l'oscillateur 1', comme dans l'oscillateur 1 des figures 1 à 3, la paire de lames 4c, 4d est symétrique de la paire de lames 4a, 4b par rapport au centre de rotation O de la serge 3. L'oscillateur 1' est représenté avec une position des points de croisement P1, P2 plus proche des points de jonction des lames correspondantes au support que dans le mode de réalisation des figures 1 à 3.In the example of Figures 1 to 3 the whole pair of blades 4a, 4b is shifted with respect to the pair of blades 4c, 4d. However, it is possible to obtain the offset between the points of intersection P1, P2 in another way, for example by shifting only one blade of the pair of blades 4a, 4b with respect to the blade of the other pair of blades 4c, 4d. which is symmetrical to it, as in oscillator 1 'schematically illustrated in FIG. figure 6 . In Oscillator 1 ', as in Oscillator 1 of Figures 1 to 3 , the pair of blades 4c, 4d is symmetrical with the pair of blades 4a, 4b with respect to the center of rotation O of the serge 3. The oscillator 1 'is represented with a position of the points of intersection P1, P2 closer to the junction points of the blades corresponding to the support that in the embodiment of the Figures 1 to 3 .

Selon un autre mode de réalisation de l'invention qui peut être combiné aux précédents et qui est illustré à la figure 7, l'oscillateur, désigné par 1 ", est agencé pour permettre un réglage de la position des points de croisement P1, P2 afin d'optimiser l'isochronisme (marche nulle entre les amplitudes d'oscillation de 20° et de 2°, cf. figure 5) malgré les tolérances de fabrication. La partie 2a du support 2 depuis laquelle s'étendent les première et deuxième lames 4a, 4b est en deux sous-parties 21, 22 reliées par un organe élastique 23 et donc mobiles l'une par rapport à l'autre. La partie 2b du support 2 depuis laquelle s'étendent les troisième et quatrième lames 4c, 4d est en deux sous-parties 24, 25 mobiles l'une par rapport à l'autre et fixées respectivement aux deux sous-parties 21, 22 de la partie 2a du support 2. Dans ce mode de réalisation, l'ordre des lames 4a à 4d dans la direction verticale est différent de celui du mode de réalisation illustré aux figures 1 à 3 et, de préférence, les deux sous-parties 21, 22 de la partie 2a du support 2, l'organe élastique 23, les première et deuxième lames 4a, 4b et une première moitié 3a de la serge 3 forment un premier ensemble monolithique et la partie 2b du support 2, les troisième et quatrième lames 4c, 4d et une deuxième moitié 3b de la serge 3 forment un deuxième ensemble monolithique, ces deux ensembles monolithiques étant assemblés l'un à l'autre.According to another embodiment of the invention which can be combined with the above and which is illustrated in FIG. figure 7 the oscillator, designated by 1 ", is arranged to allow an adjustment of the position of the crossing points P1, P2 in order to optimize the isochronism (zero running between oscillation amplitudes of 20 ° and 2 °, cf. figure 5 ) despite manufacturing tolerances. The part 2a of the support 2 from which extend the first and second blades 4a, 4b is in two subparts 2 1 , 2 2 connected by an elastic member 2 3 and thus movable relative to each other. The portion 2b of the support 2 from which extend the third and fourth blades 4c, 4d is into two sub-parts 2 4, 2 5 mobile relative to each other and fixed respectively to the two sub-parts 2 1 , 2 2 of the part 2a of the support 2. In this embodiment, the order of the blades 4a to 4d in the vertical direction is different from that of the embodiment illustrated in FIGS. Figures 1 to 3 and, preferably, the two sub-parts 2 1 , 2 2 of the part 2a of the support 2, the elastic member 2 3 , the first and second blades 4a, 4b and a first half 3a of the serge 3 form a first monolithic assembly and the portion 2b of the support 2, the third and fourth blades 4c, 4d and a second half 3b of the serge 3 form a second monolithic assembly, these two monolithic assemblies being assembled to one another.

L'organe élastique 23 est un organe de guidage conçu pour autoriser un déplacement des sous-parties 21, 22 de la partie 2a du support 2 seulement en translation. Dans une variante, il pourrait être conçu pour autoriser un déplacement des sous-parties 21, 22 seulement en rotation. Il pourrait aussi être supprimé.The elastic member 23 is a guide member designed to allow a displacement of the sub-parts 2 1 , 2 2 of the portion 2a of the support 2 only in translation. In a variant, it could be designed to allow displacement of the sub-parts 2 1 , 2 2 only in rotation. It could also be deleted.

En pratique, le support 2 peut être monté sur un dispositif de réglage. Le dispositif de réglage est par exemple à excentrique ou à vis micrométrique associé(e) à un coulisseau ou à un système à guidage linéaire flexible. Un exemple de tel dispositif de réglage est illustré à la figure 8. Il comprend un coulisseau 5 guidé dans une rainure 6 d'un support 7 fixé sur le bâti du mouvement horloger. La position du coulisseau 5 dans la rainure 6 peut être réglée par un excentrique 8. Un ressort de rappel 9 maintient le coulisseau 5 en appui contre l'excentrique 8. Le coulisseau 5 porte une goupille 10 engagée dans un ou des trous alignés 12 des sous-parties 21, 24 du support 2. Le support 7 porte une autre goupille 11 engagée dans un ou des trous alignés 13 des sous-parties 22, 25 du support 2.In practice, the support 2 can be mounted on an adjustment device. The adjustment device is for example eccentric or micrometer screw associated (e) a slider or a flexible linear guide system. An example of such an adjustment device is illustrated in FIG. figure 8 . It comprises a slider 5 guided in a groove 6 of a support 7 fixed on the frame of the watch movement. The position of the slider 5 in the groove 6 can be adjusted by an eccentric 8. A return spring 9 holds the slider 5 in abutment against the eccentric 8. The slider 5 carries a pin 10 engaged in one or more aligned holes 12 of the sub-parts 2 1 , 2 4 of the support 2. The support 7 carries another pin 11 engaged in one or more aligned holes 13 of the sub-parts 2 2 , 2 5 of the support 2.

Ainsi, en réglant la position relative des sous-parties 21, 22 de la partie 2a du support 2, et avec elle la position relative des sous-parties 24, 25 de la partie 2b du support 2, on règle la position des points de croisement P1, P2. L'assemblage des parties 2a, 2b du support 2 est tel que la symétrie des paires de lames 4a, 4b et 4c, 4d est conservée après le réglage. En d'autres termes, les positions respectives des points de croisement P1, P2 sont réglées simultanément et symétriquement.Thus, by adjusting the relative position of the sub-parts 2 1 , 2 2 of the part 2a of the support 2, and with it the relative position of the sub-parts 2 4 , 2 5 of the part 2b of the support 2, the position of crossing points P1, P2. The assembly of the parts 2a, 2b of the support 2 is such that the symmetry of the pairs of blades 4a, 4b and 4c, 4d is retained after adjustment. In other words, the respective positions of the crossing points P1, P2 are set simultaneously and symmetrically.

Claims (11)

Oscillateur d'horlogerie (1 ; 1' ; 1 ") comprenant une serge (3), un support (2) et un pivot flexible (4) reliant la serge (3) au support (2) pour guider la serge (3) en rotation par rapport au support (2) autour d'un axe de rotation virtuel (A), le pivot flexible (4) étant agencé pour rappeler élastiquement la serge (3) vers une position de repos, caractérisé en ce que le pivot flexible (4) comprend une première paire de lames constituée par des première et deuxième lames élastiques (4a, 4b) qui s'étendent dans des premier et deuxième plans parallèles et qui se croisent sans contact et une deuxième paire de lames constituée par des troisième et quatrième lames élastiques (4c, 4d) qui s'étendent dans des troisième et quatrième plans parallèles aux premier et deuxième plans et qui se croisent sans contact, et en ce que, en vue plane de dessus et lorsque la serge (3) est dans sa position de repos, la première paire de lames (4a, 4b) et la deuxième paire de lames (4c, 4d) sont symétriques par rapport au centre de rotation (O) de la serge (3) et le point de croisement (P1) des première et deuxième lames élastiques (4a, 4b) est décalé par rapport au point de croisement (P2) des troisième et quatrième lames élastiques (4c, 4d).Clock oscillator (1; 1 '; 1 ") comprising a serge (3), a support (2) and a flexible pivot (4) connecting the serge (3) to the support (2) to guide the serge (3) in rotation with respect to the support (2) around a virtual axis of rotation (A), the flexible pivot (4) being arranged to resiliently bias the serge (3) towards a rest position, characterized in that the flexible pivot (4) comprises a first pair of blades constituted by first and second resilient blades (4a, 4b) which extend into first and second parallel planes and which intersect without contact and a second pair of blades constituted by third and fourth elastic blades (4c, 4d) which extend in third and fourth planes parallel to the first and second planes and which intersect without contact, and in that in plan view from above and when the serge (3) is in its rest position, the first pair of blades (4a, 4b) and the second pair of blades (4c, 4d) are symmetrical with respect to the center of rotation (O) of the serge (3) and the point of intersection (P1) of the first and second elastic blades (4a, 4b) is offset with respect to the point of intersection ( P2) of the third and fourth resilient blades (4c, 4d). Oscillateur d'horlogerie (1) selon la revendication 1, caractérisé en ce que la première paire de lames (4a, 4b) et la deuxième paire de lames (4c, 4d) sont également symétriques, en vue plane de dessus et lorsque la serge (3) est dans sa position de repos, par rapport à une droite (D) passant par le centre de rotation (O) de la serge (3).Clock oscillator (1) according to claim 1, characterized in that the first pair of blades (4a, 4b) and the second pair of blades (4c, 4d) are also symmetrical, in plan view from above and when the serge (3) is in its rest position, with respect to a line (D) passing through the center of rotation (O) of the serge (3). Oscillateur d'horlogerie (1 ; 1' ; 1") selon la revendication 1 ou 2, caractérisé en ce que le décalage des points de croisement (P1, P2) est tel que la marche entre une amplitude d'oscillation de 20° et une amplitude d'oscillation de 2° de l'oscillateur est sensiblement nulle.Clock oscillator (1; 1 '; 1 ") according to claim 1 or 2, characterized in that the offset of the crossing points (P1, P2) is such that the between an oscillation amplitude of 20 ° and a oscillation amplitude of 2 ° of the oscillator is substantially zero. Oscillateur d'horlogerie (1; 1'; 1") selon l'une quelconque des revendications 1 à 3, caractérisé en ce que, en vue plane de dessus et lorsque la serge (3) est dans sa position de repos, l'angle (α) entre les première et deuxième lames élastiques (4a, 4b) et entre les troisième et quatrième lames élastiques (4c, 4d) est compris entre 80° et 100° et de préférence sensiblement égal à 90°.Clock oscillator (1; 1 '; 1 ") according to any one of claims 1 to 3, characterized in that , in plan view from above and when the serge (3) is in its rest position, angle (α) between the first and second resilient blades (4a, 4b) and between the third and fourth resilient blades (4c, 4d) is between 80 ° and 100 ° and preferably substantially equal to 90 °. Oscillateur d'horlogerie (1; 1'; 1") selon l'une quelconque des revendications 1 à 4, caractérisé en ce que, en vue plane de dessus et lorsque la serge (3) est dans sa position de repos, le décalage entre les points de croisement (P1, P2) est d'au moins 1 µm, de préférence d'au moins 1,2 µm, de préférence d'au moins 1,5 µm, de préférence d'au moins 2 µm, de préférence d'au moins 3 µm, de préférence d'au moins 4 µm, de préférence d'au moins 5 µm, de préférence d'au moins 6 µm, de préférence d'au moins 7 µm, de préférence d'au moins 8 µm, de préférence d'au moins 9 µm, de préférence d'au moins 10 µm, de préférence d'au moins 15 µm, de préférence d'au moins 20 µm.Clock oscillator (1; 1 '; 1 ") according to any one of claims 1 to 4, characterized in that , in plan view from above and when the serge (3) is in its rest position, the offset between the crossing points (P1, P2) is at least 1 μm, preferably at least 1.2 μm, preferably at least 1.5 μm, preferably at least 2 μm, preferably at least 3 μm, preferably at least 4 μm, preferably at least 5 μm, preferably at least 6 μm, preferably at least 7 μm, preferably at least 8 μm, preferably at least 9 μm, preferably at least 10 μm, preferably at least 15 μm, preferably at least 20 μm. Oscillateur d'horlogerie (1") selon l'une quelconque des revendications 1 à 5, caractérisé en ce que la position des points de croisement (P1, P2) est réglable.Clock oscillator (1 ") according to any one of claims 1 to 5, characterized in that the position of the crossing points (P1, P2) is adjustable. Oscillateur d'horlogerie (1") selon la revendication 6, caractérisé en ce que le support (2) comprend une première partie (21, 24) et une deuxième partie (22, 25) qui sont mobiles l'une par rapport à l'autre et en ce que la position des points de croisement (P1, P2) est réglable par un réglage de la position relative de ces première et deuxième parties.Clock oscillator (1 ") according to claim 6, characterized in that the support (2) comprises a first part (2 1 , 2 4 ) and a second part (2 2 , 2 5 ) which are movable one relative to each other and in that position cross points (P1, P2) is adjustable by adjusting the relative position of these first and second parts. Dispositif horloger comprenant un oscillateur d'horlogerie (1") selon l'une quelconque des revendications 1 à 7 et un dispositif de réglage (5-11) permettant de régler la position des points de croisement (P1, P2).Clock device comprising a clock oscillator (1 ") according to any one of claims 1 to 7 and an adjustment device (5-11) for adjusting the position of the cross points (P1, P2). Dispositif horloger selon la revendication 8, caractérisé en ce que le dispositif de réglage (5-11) comprend un excentrique de réglage (8) ou une vis micrométrique de réglage.Clock device according to claim 8, characterized in that the adjusting device (5-11) comprises an adjusting eccentric (8) or a micrometer adjustment screw. Mouvement horloger comprenant un oscillateur d'horlogerie (1 ; 1' ; 1 ") selon l'une quelconque des revendications 1 à 7 ou un dispositif horloger selon la revendication 8 ou 9.A watch movement comprising a watch oscillator (1; 1 '; 1 ") according to any of claims 1 to 7 or a watch device according to claim 8 or 9. Montre comprenant un mouvement horloger selon la revendication 10.Watch comprising a watch movement according to claim 10.
EP17163684.8A 2017-03-29 2017-03-29 Timepiece oscillator with a flexible pivot Active EP3382470B1 (en)

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EP3451073A1 (en) * 2017-07-28 2019-03-06 The Swatch Group Research and Development Ltd Timepiece oscillator having flexible guides with wide angular travel
US10895845B2 (en) 2018-06-25 2021-01-19 The Swatch Group Research And Development Ltd Timepiece oscillator with flexure bearings having a long angular stroke
WO2021009613A1 (en) * 2019-07-12 2021-01-21 Patek Philippe Sa Geneve Method for adjusting a flexibly pivoted clock oscillator
CN112506022A (en) * 2019-09-13 2021-03-16 Eta瑞士钟表制造股份有限公司 Bearing for a timepiece movement, in particular a shock-absorbing bearing for the shaft of a rotating wheel
EP4286959A1 (en) 2022-06-02 2023-12-06 Patek Philippe SA Genève Timepiece oscillator with flexible pivot

Families Citing this family (1)

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WO2024100597A1 (en) 2022-11-09 2024-05-16 Ecole Polytechnique Federale De Lausanne (Epfl) Pivot, process for manufacturing such a pivot, oscillator comprising such a pivot, watch movement and timepiece comprising such an oscillator

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EP3451073A1 (en) * 2017-07-28 2019-03-06 The Swatch Group Research and Development Ltd Timepiece oscillator having flexible guides with wide angular travel
US10895845B2 (en) 2018-06-25 2021-01-19 The Swatch Group Research And Development Ltd Timepiece oscillator with flexure bearings having a long angular stroke
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CN112506022A (en) * 2019-09-13 2021-03-16 Eta瑞士钟表制造股份有限公司 Bearing for a timepiece movement, in particular a shock-absorbing bearing for the shaft of a rotating wheel
EP4286959A1 (en) 2022-06-02 2023-12-06 Patek Philippe SA Genève Timepiece oscillator with flexible pivot

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