EP2887151A2 - Oscillating element for a clockwork - Google Patents

Oscillating element for a clockwork Download PDF

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Publication number
EP2887151A2
EP2887151A2 EP14197767.8A EP14197767A EP2887151A2 EP 2887151 A2 EP2887151 A2 EP 2887151A2 EP 14197767 A EP14197767 A EP 14197767A EP 2887151 A2 EP2887151 A2 EP 2887151A2
Authority
EP
European Patent Office
Prior art keywords
compliant
axis
beams
prestressing
elastic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP14197767.8A
Other languages
German (de)
French (fr)
Other versions
EP2887151B1 (en
EP2887151A3 (en
Inventor
Carla Lambert
Emilie Sellez
Alexander Hasse
René Jähne
Kurt Straumann
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.)
Richemont International SA
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Richemont International SA
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Filing date
Publication date
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Publication of EP2887151A2 publication Critical patent/EP2887151A2/en
Publication of EP2887151A3 publication Critical patent/EP2887151A3/en
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Publication of EP2887151B1 publication Critical patent/EP2887151B1/en
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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
    • G04B15/00—Escapements
    • G04B15/06—Free escapements
    • G04B15/08—Lever escapements
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B15/00—Escapements
    • G04B15/14—Component parts or constructional details, e.g. construction of the lever or the escape wheel
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B31/00—Bearings; Point suspensions or counter-point suspensions; Pivot bearings; Single parts therefor
    • 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
    • G04B31/004—Bearings; Point suspensions or counter-point suspensions; Pivot bearings; Single parts therefor characterised by the material used
    • G04B31/012—Metallic bearings

Definitions

  • the present invention relates to an oscillating element for mechanical clockwork movement.
  • Mechanical clock movements comprise numerous oscillating elements, in particular elements rotated alternately in one direction and then in the other.
  • the balance wheel, the hairspring, the escapement anchor, the winding mass, and certain complications are examples of such oscillating elements.
  • the power reserve of a mechanical watch depends especially losses due to friction in the train and in the pivot of the regulating member. It is therefore advantageous to reduce these friction in order to increase the power reserve. Friction at the parts oscillating rapidly, especially in the exhaust, are particularly critical.
  • the performance of a typical Swiss lever escapement is typically of the order of about 40%; 60% of the energy transmitted by the gear train to the exhaust is lost in friction.
  • Compliant mechanisms are known in the state of the art which are often used to reduce friction or improve the accuracy of a displacement.
  • a compliant mechanism is a mechanism that, unlike rigid body-based mechanisms, allows displacement by the flexibility of at least one limb.
  • a compliant element allows the rotation of an axis thanks to the flexibility of at least one member.
  • the compliant elements therefore partially or completely avoid the friction of moving parts relative to each other, and the energy losses and the wear of the parts that result from this friction. They also make it possible to elegantly solve the problems caused by the play of conventional bearings.
  • EP2273323A2 describes a mechanical oscillator based on a compliant mechanism.
  • the mechanism illustrated on the figure 4 comprises a prestressing system exerted from the axis of the balance.
  • WO2012 / 010408 describes an escapement anchor with an elastic pivot.
  • US3678683 describes a regulating organ and an exhaust.
  • the anchor is mounted on a conventional axis.
  • DE2714020 describes a gear wheel for quartz watches, allowing rotation without noise and with minimal torque.
  • the pivot is replaced by flexible blades between the periphery of the pinion and the ring gear, thus allowing this ring to rotate with an elastic game.
  • EP2455821 relates to an escape wheel whose pivot is replaced by a compliant mechanism.
  • WO2011 / 120180A1 discloses a gear lock device based on another compliant link. Again, this device is made in one piece or in one piece with the exception of pallets, making its design difficult.
  • a compliant link integrated in the blocker also has the disadvantage of not be easily adapted to an existing blocker; it is necessary to completely redraw the entire blocker.
  • An object of the present invention is to provide an oscillating element for a watch movement free from the limitations of known oscillating elements, in particular an oscillating element capable of oscillating with minimal torque and energy losses as small as possible.
  • Another object of the present invention is to provide an oscillating element for a watch movement capable of oscillating with a torque and energy losses as constant as possible.
  • Another object of the present invention is to provide an oscillating element based on a compliant connection but which does not have the drawbacks of existing compliant links.
  • Another object of the present invention is to provide an oscillating element for a watch movement based on a compliant connection and whose overall size in the plane of the oscillating anchor is as small as possible.
  • this construction makes it possible to separate the two functions of the oscillating element into two components on two different planes.
  • the first functional component that is to say the anchor
  • the second component is constituted by a compliant element on another plane.
  • the anchor is a functional component in the foreground that provides a function in the context of the watch movement; the second compliant component on the second plane does not provide no function other than "virtual" pivot for the axis of the first component.
  • the first and second parts of the axis are first and second ends of the axis respectively.
  • the compliant element therefore occupies no space in the foreground of the anchor. Both components can be made and dimensioned independently of each other, allowing uncompromising optimization of each component.
  • the compliant element can for example be used with existing functional components, without modification of these components.
  • the two components are linked to each other by an axis.
  • the compliant element acts on an axis (which is integral with the functional component) and not directly on the periphery of the functional component as is the case in the prior art. This is advantageous, for example for fragile components or that have complex shapes.
  • compliant element designates in this text an element that allows a displacement of a part, for example a rotation of an axis, thanks to the elastic deformation, for example the bending, of at least a part of the 'element.
  • a compliant element can therefore operate without friction between the moving part (for example an axis) and fixed part.
  • the compliant element is made to allow rotation of an axis with a torque as low as possible. It therefore exerts no return force on the axis, or only a negligible return torque or in any case voluntarily chosen to be as low as possible, at least in the expected range of oscillations.
  • the compliant element comprises two flexible beams forming a cross intersection. This construction minimizes clutter and facilitates synthesis and simulation.
  • the beams may be for example straight beams.
  • the axis is mounted at the intersection between said beams.
  • One or preferably two ends of two adjacent branches of the cross may be attached to the frame of the movement by means of mounting points provided for this purpose.
  • the mounting points may for example be openings for the driving or gluing of fixing pins.
  • the one or both ends of the one or both limbs can thus be fixed relative to the frame, while the end of the two other limbs, as well as the point of intersection, can be movable when the limbs of the compliant element are deformed. .
  • the elastic prestressing element makes it possible to exert a prestressing force on the compliant element so as to modify the torque necessary for the rotation of said axis.
  • the prestressing is chosen so as to minimize the torque necessary for the rotation of the axis. Prestressing is advantageously exercised simultaneously on two adjacent branches of the cross of the compliant element.
  • the elastic prestressing element may be integrally bonded to the compliant element, or even form a single element, which facilitates assembly and alignment.
  • the elastic prestressing element can exert a prestressing force on both ends of two adjacent branches of the cross.
  • This prestressing force can be exerted directly by the elastic prestressing element on the compliant element.
  • This prestressing force can be exerted by the elastic prestressing element on the compliant element through a part support through two branches.
  • This solution has the advantage of distributing the prestressing force on the two branches.
  • This prestressing force can be exerted by the elastic prestressing element on the compliant element through a support piece through two branches and an articulated connection.
  • This solution has the advantage of allowing a relative displacement of the elastic prestress element with respect to the compliant element.
  • the elastic prestressing element may be shaped so as to comprise two strands. One end of each strand is rigidly connected to one end of a fixed branch of the cross, another portion of each strand exerts a prestressing force on the free end of another branch of the cross.
  • the elastic prestress element and the compliant element is at least partly in the same plane.
  • the elastic prestressing element being dimensioned and structured so as to exert a substantially constant prestressing force on the compliant element even when the compliant element is deformed. Calculations and simulations have shown that a constant prestressing force makes it possible to minimize the torque necessary for the rotation of the axis, and to prevent this torque from being dependent on the angular position.
  • the strands may be bonded to each other so as to form a ring.
  • the axis can be driven out and / or glued in the anchor and / or in the compliant element.
  • This arrangement of the cross beams makes it possible to obtain a central symmetry of the forces exerted by the deformable beams on the point of rotation.
  • the anchor and the compliant element may be in the same plane (at least partially) without necessarily being interconnected by an axis.
  • the anchor and the compliant element can be in different planes linked together by an axis.
  • At least one elastic prestressing element may optionally be provided to exert a prestressing force on the compliant element so as to modify the torque necessary for rotating the functional component.
  • This elastic prestressing element can act for example on the distal ends of the beams.
  • the anchor can be a Swiss anchor for Swiss anchor escapement.
  • the invention also relates to a regulating member comprising a compliant oscillating anchor, for example an oscillating anchor by means of an oscillating element according to any of the embodiments described in this application, fixed on an exhaust door which also carries the escape wheel and, preferably, the balance shaft with the balance and the balance spring.
  • a compliant oscillating anchor for example an oscillating anchor by means of an oscillating element according to any of the embodiments described in this application, fixed on an exhaust door which also carries the escape wheel and, preferably, the balance shaft with the balance and the balance spring.
  • the figure 1 illustrates a perspective view of an oscillating element according to a first embodiment of the invention.
  • the figure 2 illustrates a top view of an oscillating element according to the first embodiment of the invention.
  • the figure 3 illustrates a side view of an oscillating element according to the invention.
  • the figure 4 illustrates a perspective view of an oscillating element according to a second embodiment of the invention.
  • the figure 5 illustrates a perspective view of an oscillating element according to a third embodiment of the invention.
  • the figure 6 illustrates a top view of an oscillating element according to a fourth embodiment of the invention.
  • the figure 7 is an exploded view of an oscillating element according to a fifth embodiment of the invention.
  • the functional component 2 that is to be oscillated at one end of the axis 3 is an anchor, more particularly a Swiss anchor for Swiss anchor escapement.
  • the anchor 2 comprises in this example two pallets 20A and 20B, a fork 21 and a dart 22. It can be made of steel or advantageously in silicon or in another material allowing fabrication by one of the photolithography methods, DRIE (abbreviation for "Deep Reactive Ion Etching") or LIGA (abbreviation for "Lithography, Galvanoformung, Abformung”). It is mounted on a first end of the axis 3 by driving, for example in the case of a metal anchor, or by gluing, for example in the case of a silicon anchor. Alternatively, the axis 3 and the anchor 2 can be formed in one piece. An anchor integrating the pallets and / or the stinger into a monolithic assembly can also be envisaged.
  • Axis 3 is not a conventional moving axle that pivots in bearings. Instead, the oscillating element preferably comprises at the other end of the axis 3 a compliant element 4.
  • the compliant element is of the cross type and therefore comprises two rectilinear beams 5A, 5B which intersect at X.
  • the axis 3 is mounted at the intersection between the two beams 5A, 5B, this intersection being coincident with the center rotation of the compliant element.
  • Non-rectilinear beams may be used, including curved or bent beams.
  • the four branches of the cross are referenced by the numbers 7A to 7D.
  • the distal ends of two adjacent branches 7A, 7B of the cross are provided with attachment points 6A, 6B to fix them on a part of the movement frame, such as the plate, a bridge, an exhaust door, or a cage of whirlwind.
  • the oscillating element is fixed by means of pins or pins or screws inserted into these two attachment points.
  • the oscillating element can be fixed on an exhaust-door which also carries the escape wheel and, preferably, the balance shaft with the balance and the hairspring. This configuration facilitates the alignment and mounting of various components of the regulating member.
  • a connecting member 60 is integrally bonded to the distal end of the two legs 7A, 7B and provided with two attachment points 6A, 6B in the form of through holes. This configuration allows in particular to move the fixing bridges with respect to the elastic beams 5A, 5B whose deformable length can thus be maximized.
  • the two strands 80A, 80B leave the connecting element 60 near the fixed ends of the cross and surround the two beams 5A, 5B so as to exert a prestressing force on the distal ends of the free branches 7C, 7D. More particularly, one end 81A, 81B of each strand is rigidly connected to one end of each fixed branch 7A, 7B of the cross. They are thus united in a single ring.
  • the resilient member 80A, 80B bears directly at the points 81C, 81D against the distal ends of the branches 7C, 7D.
  • the prestressing force is exerted by the elastic element 80A, 80B through a support piece 9 which distributes and equalizes the pressure against the two branches 7C, 7D.
  • This solution ensures equal pressure on the two branches 7C, 7D even in the case of slight differences in length due to example to imperfections of manufacture.
  • the support element 9 may be integral, monolithic with the two branches 7C, 7D.
  • An articulated connecting element 90 is advantageously pivotally connected on the one hand to the strands 80A, 80B, on the other hand to the support piece 9.
  • This connecting element guarantees a constant distance between these two elements while allowing a rotation in relation to the blades 80A, 80B and relative to the part 9.
  • it has a bone shape with a head, or epiphysis, approximately hemispherical at each end of a central portion. Each head collaborates with a corresponding dome in the strands 80A, 80B respectively in the support piece 9.
  • the prestressing force exerted by the strands 80A, 80B depends on the length of the connecting element 90 and the displacement it causes on the support piece 9 and on the ends of the branches 7C, 7D.
  • an oscillating element can be delivered with several connecting elements of different lengths to adjust the prestressing force.
  • the mounting of the oscillating element may comprise the choice of a connecting element 90 of suitable length among several connecting elements of different lengths.
  • the ideal length of the connecting member 90 is determined by digital simulation once and for all during the design, and applied.
  • the compliant element is therefore constituted in this example of two parts: the cross structure 5A, 5B with the elastic element 80A, 80B and the elements 9 and 60; and the connecting element 90.
  • these two parts can be made of steel, silicon, etc.
  • the figure 4 illustrates a second variant of oscillating element 1 for watch movement.
  • the oscillating component 2 is an anchor, represented without its pallets but which could naturally be equipped with pallets.
  • the compliant element 4 comprises three flexible beams 5C, 5D 5E star about the axis 3.
  • the elastic prestressing element 8 is constituted by three strands 80C, 80D, 80E forming a triangle, for example a equilateral triangle. The ends of the three beams are connected to the three respective points of the triangle.
  • Prestressing is therefore exerted in the same way on all three beams 5C to 5E.
  • the end of the three beams is not blocked.
  • One advantage is that the center of the axis 3 remains almost immobile even during rotation of the part 2.
  • the oscillating element 1 is fixed to the frame of the movement by the three mounting points 6C, 6D, 6E directly on the prestressing element 80C to 80E.
  • the mounting points are linked to the media of the strands 80C to 80E.
  • it is a displacement applied on the strands 80C to 80E which creates the constraint.
  • Compliant elements with a number of star arms different from three can be envisaged, for example compliant elements with 2, 4, 5, .. N star arms around the axis 3.
  • the angular space between the different ras is preferably constant and equal to 360 ° / N.
  • the figure 5 illustrates a third compliant element variant 4 intended to be integrated in an oscillating element for a watch movement.
  • the compliant element 4 comprises two beams 5A, 5B forming a cross about the axis 3.
  • the oscillating component for example an exhaust anchor not shown, is intended to be mounted on the axis 3 in another plane than the compliant element 4.
  • the two beams 5A, 5B X form four branches 7A to 7D whose ends are connected in pairs thanks to the connecting elements 60 and 61, respectively.
  • a resilient ring preload member 8 has two strands 80A, 80B which join the center of the connecting member 60 with the center of the connecting member 61, forming a ring.
  • This elastic element 8 exerts a prestressing force directly on the distal ends of the four branches 7A to 7D. More particularly, one end 81 A, 81 B of each strand is rigidly connected to one end of each fixed branch 7A, 7B of the cross. No connecting part 9 is used between the prestressing element and the connecting elements 60, 61.
  • the compliant element 4 is mounted on the movement frame by two mounting points 6F, 6G directly on the constraining element 8, for example in the middle of the strands 80A respectively 80B.
  • the amplitude of the prestressing force is identical on all the beams.
  • the center of the axis 3 remains motionless even when rotating the workpiece 2.
  • the figure 6 illustrates a fourth compliant element variant 4 intended to be integrated in an oscillating element for watch movement.
  • This variant corresponds to the third variant, except that the free ends of the four branches 7A to 7D are connected to the prestressing element 8 by means of two support pieces 9A, 9B connecting the branches two by two, and bone-shaped connecting members 90A, 90B bonding these support members 9A, 9B to the strands 80A, 80B of the prestressing member.
  • These connecting elements allow a displacement according to several degrees of freedom of the prestressing element 8 relative to the support parts 9A, 9B and with respect to the end of beams. In this variant, it is a displacement applied on the support pieces 9A, 9B which creates the constraint.
  • the shape and structure of the elastic element is optimized, for example by successive approximations, so that the prestressing force remains substantially constant even when the various beams of the compliant element are deformed, throughout the deformation range. usual. This ensures that the restoring torque exerted on the axis 3 is independent of its angular position.
  • the thickness of the strands 80A, 80B is irregular in order to achieve this objective.
  • the figure 7 illustrates a fifth variant compliant element 4 intended to be integrated in an oscillating element for watch movement.
  • This variant is different from that of the figure 5 mainly by the shape of the elastic prestressing element; the other elements may be identical to those described in relation to the figure 5 and will not be described.
  • the elastic prestressing element 8 is formed of two arms 80A, 80B which do not meet directly, but connect pairs of points on the connecting elements 60, 61. More specifically, the arm 80B connects the point 600 near one end of the connecting member 60 with the point 610 near the corresponding end of the other connecting member 61; the arm 80A connects the point 601 near one end of the connection element 60 with the point 611 near the corresponding end of the other connection element 61
  • the mounting points 6H, 6I of the constraint element 8 on the frame are on the prestressing element 8, as in FIG. figure 5 . However, these mounting points are not directly in the middle of the strands 80A, 80B, but are connected to these strands by elastic elements 80C respectively 80D.
  • each of the resilient members 80C, 80D is constituted by a ring one point of which is linked to a strand 80A, respectively 80D, and another point at 180 ° is bound to one side of a mounting point 6H, 6I opposite to the strand.
  • the mounting points 6H, 6I do not limit or almost no freedom of the strands 80A, 80B to move, which allows the constraint element 8 as a whole to exert a greater stress on the compliant element 4.
  • the compliant element 4 can be assembled on a wafer 11 made for example of LIGA and having pads 110 for receiving the mounting points 6H, 6I.
  • the plate 11 may be mounted on the frame of the movement or be part of this frame. This plate 11 makes it possible to obtain better control of the prestressing applied to the compliant element 4 by better precision of the spacings between the studs 110. More particularly, the studs 110 and the plate 11 preferably form one single piece, as well as misalignment during assembly can be practically. In addition, we obtain a greater ease of assembly of the assembly on the frame of the movement, and therefore the replacement of this set if necessary.
  • this plate can be integrated into an exhaust door, and it can be used to adjust the position of the anchor by moving the plate on the movement frame.
  • This plate 11 may be used in combination with oscillating elements different from that of the figure 7 , for example with an oscillating element according to any embodiment according to one of the Figures 1 to 6 .
  • an oscillating element for a watch movement comprising an anchor, a compliant element in the same plane and which allows this anchor to rotate when the compliant element is deformed elastically, and at least one elastic prestressing element. which exerts a prestressing force on the compliant element so as to modify the torque necessary for the rotation of the anchor.
  • the elastic prestress element may be in the same plane as the compliant element, and / or in the same plane as the anchor, or in another plane.
  • the anchor and the compliant element may be in the same plane (at least partially) without necessarily being interconnected. by an axis.
  • the anchor and the compliant element can be in different planes linked together by an axis.
  • an oscillating element for a watch movement comprising a compliant element 4 formed of several intersecting beams 5A, 5B, the intersection point of the beams defining a center of rotation for the anchor in the same plane or in a different plane than the compliant element.
  • the number of beams can be two, three, etc.
  • the beams are advantageously arranged symmetrically around the center of rotation.
  • An elastic prestressing element 8 may optionally be provided to exert a prestressing force on the distal ends of the beams, so as to modify the torque necessary for the rotation of the anchor.

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Abstract

Elément oscillant (1) pour mouvement horloger comportant :
un axe (3) ;
une ancre (2) montée sur une première partie dudit axe (3) de manière à pouvoir tourner avec ledit axe ;
un élément compliant (4) monté sur une deuxième partie de l'axe (3) de manière à permettre à cet axe de tourner lorsque ledit élément compliant se déforme élastiquement,
l'élément compliant (4) comportant plusieurs poutres flexibles (5A, 5B) formant une intersection, ledit axe (3) étant monté à l'intersection entre lesdites poutres;
un élément élastique de précontrainte (8) pour exercer une force de précontrainte sur l'élément compliant (4) de manière à modifier le couple nécessaire à la mise en rotation dudit axe (3) ;
ledit élément élastique de précontrainte (8) comportant au moins deux brins (80A, 80B) ;
une extrémité (81 A, 81 B) de chaque brin étant liée rigidement à une extrémité d'une desdites poutres..

Figure imgaf001
Oscillating element (1) for a watch movement comprising:
an axis (3);
an anchor (2) mounted on a first portion of said axis (3) so as to be rotatable with said axis;
a compliant element (4) mounted on a second part of the axis (3) so as to allow this axis to rotate when said compliant element deforms elastically,
the compliant element (4) comprising a plurality of flexible beams (5A, 5B) forming an intersection, said axis (3) being mounted at the intersection between said beams;
an elastic prestressing element (8) for exerting a prestressing force on the compliant element (4) so as to modify the torque necessary for the rotation of said axis (3);
said elastic prestressing member (8) having at least two strands (80A, 80B);
one end (81 A, 81 B) of each strand being rigidly connected to one end of one of said beams.
Figure imgaf001

Description

Domaine techniqueTechnical area

La présente invention concerne un élément oscillant pour mouvement horloger mécanique.The present invention relates to an oscillating element for mechanical clockwork movement.

Etat de la techniqueState of the art

Les mouvements horlogers mécaniques comportent de nombreux éléments oscillants, notamment des éléments mis en rotation alternativement dans un sens puis dans l'autre. Le balancier, le spiral, l'ancre d'échappement, la masse de remontage, et certaines complications constituent des exemples de tels éléments oscillants.Mechanical clock movements comprise numerous oscillating elements, in particular elements rotated alternately in one direction and then in the other. The balance wheel, the hairspring, the escapement anchor, the winding mass, and certain complications are examples of such oscillating elements.

La réserve de marche d'une montre mécanique dépend notamment des pertes dues aux frottements dans le rouage et dans les pivot de l'organe réglant. Il est donc avantageux de réduire ces frottements afin d'augmenter la réserve de marche. Les frottements au niveau des pièces oscillant rapidement, notamment dans l'échappement, sont particulièrement critiques. Le rendement d'un échappement à ancre suisse classique est typiquement de l'ordre de 40% environ ; 60% de l'énergie transmise par le rouage à l'échappement est donc perdue en frottements.The power reserve of a mechanical watch depends especially losses due to friction in the train and in the pivot of the regulating member. It is therefore advantageous to reduce these friction in order to increase the power reserve. Friction at the parts oscillating rapidly, especially in the exhaust, are particularly critical. The performance of a typical Swiss lever escapement is typically of the order of about 40%; 60% of the energy transmitted by the gear train to the exhaust is lost in friction.

Une partie substantielle de ces frottements se produisent au niveau des paliers. En dépit de l'utilisation de rubis et de progrès dans la lubrification, le frottement entre l'axe de l'ancre et le palier qui maintient cet axe représente donc un facteur critique de déperdition de l'énergie emmagasinée dans le barillet.A substantial part of this friction occurs at the bearings. Despite the use of rubies and progress in lubrication, the friction between the anchor axis and the bearing that maintains this axis is therefore a critical factor in the loss of energy stored in the barrel.

Par ailleurs, les paliers conventionnels requièrent un jeu entre les pivots de l'axe mobile et le palier afin de permettre à l'axe de pivoter. La précision de ce jeu dépend des tolérances de fabrication et de l'usure progressive du palier. Il en résulte un positionnement mal contrôlé de l'axe et du composant monté sur cet axe. Dans le cas d'une ancre, ce jeu se reporte sur la position relative des palettes et de la roue d'ancre, ce qui provoque également des pertes énergétiques.In addition, conventional bearings require a clearance between the pivots of the movable axis and the bearing to allow the axis to rotate. The accuracy of this game depends on manufacturing tolerances and progressive wear of the bearing. This results in poorly controlled positioning of the axis and the component mounted on this axis. In the case of an anchor, this game is reports on the relative position of the pallets and the anchor wheel, which also causes energy losses.

On connaît dans l'état de la technique des mécanismes compliants qui sont souvent utilisés pour réduire les frottements ou améliorer la précision d'un déplacement. Un mécanisme compliant est un mécanisme qui, contrairement aux mécanismes basés sur des corps rigides, permet un déplacement grâce à la flexibilité d'au moins un membre. Par exemple, un élément compliant permet la rotation d'un axe grâce à la flexibilité d'au moins un membre. Les éléments compliants évitent donc en partie ou en totalité le frottement de pièces en mouvement relatif l'un contre l'autre, et les déperditions d'énergie ainsi que l'usure des pièces qui résultent de ce frottement. Ils permettent en outre de résoudre élégamment les problèmes causés par le jeu des paliers conventionnels.Compliant mechanisms are known in the state of the art which are often used to reduce friction or improve the accuracy of a displacement. A compliant mechanism is a mechanism that, unlike rigid body-based mechanisms, allows displacement by the flexibility of at least one limb. For example, a compliant element allows the rotation of an axis thanks to the flexibility of at least one member. The compliant elements therefore partially or completely avoid the friction of moving parts relative to each other, and the energy losses and the wear of the parts that result from this friction. They also make it possible to elegantly solve the problems caused by the play of conventional bearings.

Une application des éléments compliants au domaine horloger est décrite dans la demande de brevet EP2037335A2 . Ce document décrit notamment une ancre d'échappement sans axe et qui peut tourner grâce à la déformation de deux bras dont les axes se croisent au point de rotation virtuel de l'ancre. Les bras de fixation et l'ancre forment une seule pièce relativement fragile. De surcroit, les bras de fixation occupent une surface relativement importante dans le plan de l'ancre qui est souvent particulièrement encombré ; cette place n'est pas disponible pour d'autres organes.An application of complying elements to the horological field is described in the patent application EP2037335A2 . This document describes in particular an exhaust anchor without axis and which can rotate thanks to the deformation of two arms whose axes intersect at the point of virtual rotation of the anchor. The attachment arms and the anchor form a relatively fragile single piece. In addition, the attachment arms occupy a relatively large area in the plane of the anchor which is often particularly congested; this place is not available for other organs.

EP2273323A2 décrit un oscillateur mécanique basé sur un mécanisme compliant. Le mécanisme illustré sur la figure 4 comporte un système de précontrainte exercée depuis l'axe du balancier. EP2273323A2 describes a mechanical oscillator based on a compliant mechanism. The mechanism illustrated on the figure 4 comprises a prestressing system exerted from the axis of the balance.

WO2012/010408 décrit une ancre d'échappement à pivot élastique. WO2012 / 010408 describes an escapement anchor with an elastic pivot.

US3678683 décrit un organe-réglant et un échappement. L'ancre est montée sur un axe conventionnel. US3678683 describes a regulating organ and an exhaust. The anchor is mounted on a conventional axis.

DE2714020 décrit une roue dentée pour montres à quartz, permettant une rotation sans bruit et avec un couple minime. Le pivot est remplacé par des lames flexibles entre la périphérie du pignon et la couronne dentée, permettant ainsi à cette couronne de tourner avec un jeu élastique. DE2714020 describes a gear wheel for quartz watches, allowing rotation without noise and with minimal torque. The pivot is replaced by flexible blades between the periphery of the pinion and the ring gear, thus allowing this ring to rotate with an elastic game.

EP2455821 concerne une roue d'échappement dont le pivot est remplacé par un mécanisme compliant. EP2455821 relates to an escape wheel whose pivot is replaced by a compliant mechanism.

WO2011/120180A1 décrit un dispositif de blocage pour roue dentée basé sur une autre liaison compliante. A nouveau, ce dispositif est réalisé d'un seul tenant ou d'un seul tenant à l'exception des palettes, rendant sa conception difficile. Une liaison compliante intégrée au bloqueur présente en outre l'inconvénient de pas pouvoir être adaptée facilement à un bloqueur existant ; il est nécessaire de redessiner complètement l'ensemble du bloqueur. WO2011 / 120180A1 discloses a gear lock device based on another compliant link. Again, this device is made in one piece or in one piece with the exception of pallets, making its design difficult. A compliant link integrated in the blocker also has the disadvantage of not be easily adapted to an existing blocker; it is necessary to completely redraw the entire blocker.

Un autre inconvénient des solutions décrites dans ces antériorités est qu'il est très difficile de contrôler ou de modifier le couple nécessaire à la mise en rotation des dispositifs de blocage.Another disadvantage of the solutions described in these prior art is that it is very difficult to control or modify the torque required for the rotation of the locking devices.

Bref résumé de l'inventionBrief summary of the invention

Un but de la présente invention est de proposer un élément oscillant pour mouvement horloger exempt des limitations des éléments oscillants connus, en particulier un élément oscillant capable d'osciller avec un couple minimal et des pertes énergétiques aussi réduites que possible.An object of the present invention is to provide an oscillating element for a watch movement free from the limitations of known oscillating elements, in particular an oscillating element capable of oscillating with minimal torque and energy losses as small as possible.

Un autre but de la présente invention est de proposer un élément oscillant pour mouvement horloger capable d'osciller avec un couple et des pertes énergétiques aussi constants que possible.Another object of the present invention is to provide an oscillating element for a watch movement capable of oscillating with a torque and energy losses as constant as possible.

Un autre but de la présente invention est de proposer un élément oscillant basé sur une liaison compliante mais qui ne présente pas les inconvénients des liaisons compliantes existantes.Another object of the present invention is to provide an oscillating element based on a compliant connection but which does not have the drawbacks of existing compliant links.

Un autre but de la présente invention est de proposer un élément oscillant pour mouvement horloger basé sur une liaison compliante et dont l'encombrement dans le plan de l'ancre oscillante soit aussi réduit que possible.Another object of the present invention is to provide an oscillating element for a watch movement based on a compliant connection and whose overall size in the plane of the oscillating anchor is as small as possible.

Selon un premier aspect de l'invention, ces buts sont atteints au moyen d'un élément oscillant pour mouvement horloger comportant :

  • un axe ;
  • une ancre monté sur une première partie de cet axe de manière à pouvoir tourner avec cet axe ;
  • un élément compliant monté sur une deuxième partie de l'axe de manière à permettre audit axe de tourner lorsque l'élément compliant se déforme élastiquement ;
  • l'élément compliant comportant plusieurs poutres flexibles formant une intersection, ledit axe étant monté à l'intersection entre lesdites poutres;
  • un élément élastique de précontrainte pour exercer une force de précontrainte sur l'élément compliant de manière à modifier le couple nécessaire à la mise en rotation dudit axe ;
  • ledit élément élastique de précontrainte comportant au moins deux brins;
  • une extrémité de chaque brin étant liée rigidement à une extrémité d'une desdites poutres.
According to a first aspect of the invention, these objects are achieved by means of an oscillating element for a watch movement comprising:
  • an axe ;
  • an anchor mounted on a first part of this axis so as to be rotatable with this axis;
  • a compliant element mounted on a second part of the axis so as to allow said axis to rotate when the compliant element deforms elastically;
  • the compliant element comprising a plurality of flexible beams forming an intersection, said axis being mounted at the intersection between said beams;
  • an elastic prestressing element for exerting a prestressing force on the compliant element so as to modify the torque necessary for the rotation of said axis;
  • said elastic prestressing element having at least two strands;
  • an end of each strand being rigidly connected to one end of one of said beams.

Selon cet aspect, cette construction permet de séparer les deux fonctions de l'élément oscillant en deux composants sur deux plans différents. Le premier composant fonctionnel, c'est-à-dire l'ancre, se trouve sur un premier plan et le deuxième composant est constitué par un élément compliant sur un autre plan. L'ancre constitue un composant fonctionnel sur le premier plan qui assure une fonction dans le cadre du mouvement de montre ; le deuxième composant compliant sur le deuxième plan n'assure aucune fonction à part celle de pivot « virtuel » pour l'axe du premier composant. De préférence, la première et la deuxième parties de l'axe sont une première et une deuxième extrémités de l'axe respectivement.According to this aspect, this construction makes it possible to separate the two functions of the oscillating element into two components on two different planes. The first functional component, that is to say the anchor, is on a first plane and the second component is constituted by a compliant element on another plane. The anchor is a functional component in the foreground that provides a function in the context of the watch movement; the second compliant component on the second plane does not provide no function other than "virtual" pivot for the axis of the first component. Preferably, the first and second parts of the axis are first and second ends of the axis respectively.

L'élément compliant n'occupe donc aucun espace dans le premier plan de l'ancre. Les deux composants peuvent être réalisés et dimensionnés indépendamment l'un de l'autre, permettant une optimisation sans compromis de chaque composant. L'élément compliant peut par exemple être utilisé avec des composants fonctionnels existants, sans modification de ces composants. Les deux composants sont liés l'un à l'autre par un axe.The compliant element therefore occupies no space in the foreground of the anchor. Both components can be made and dimensioned independently of each other, allowing uncompromising optimization of each component. The compliant element can for example be used with existing functional components, without modification of these components. The two components are linked to each other by an axis.

De plus, l'élément compliant agit sur un axe (qui est solidaire du composant fonctionnel) et non pas directement sur la périphérie du composant fonctionnel comme est le cas dans l'art antérieur. Ceci est avantageux, par exemple pour des composants fragiles ou qui ont des formes complexes.In addition, the compliant element acts on an axis (which is integral with the functional component) and not directly on the periphery of the functional component as is the case in the prior art. This is advantageous, for example for fragile components or that have complex shapes.

L'expression « élément compliant» désigne dans ce texte un élément qui permet un déplacement d'une pièce, par exemple une rotation d'un axe, grâce à la déformation élastique, par exemple la flexion, d'au moins une partie de l'élément. Par rapport à un palier ou à un roulement par exemple, un élément compliant peut donc fonctionner sans frottement entre partie mobile (par exemple un axe) et partie fixe.The expression "compliant element" designates in this text an element that allows a displacement of a part, for example a rotation of an axis, thanks to the elastic deformation, for example the bending, of at least a part of the 'element. With respect to a bearing or a bearing for example, a compliant element can therefore operate without friction between the moving part (for example an axis) and fixed part.

Avantageusement, l'élément compliant est réalisé de manière à permettre une rotation d'un axe avec un couple aussi faible que possible. Il n'exerce par conséquent aucune force de rappel sur l'axe, ou seulement un couple de rappel négligeable ou en tout cas volontairement choisi pour être aussi faible que possible, au moins dans la plage d'oscillations prévue.Advantageously, the compliant element is made to allow rotation of an axis with a torque as low as possible. It therefore exerts no return force on the axis, or only a negligible return torque or in any case voluntarily chosen to be as low as possible, at least in the expected range of oscillations.

Dans un mode de réalisation avantageux, l'élément compliant comporte deux poutres flexibles formant une intersection en croix. Cette construction permet de minimiser l'encombrement et de faciliter la synthèse et la simulation. Les poutres peuvent être par exemple des poutres droites.In an advantageous embodiment, the compliant element comprises two flexible beams forming a cross intersection. This construction minimizes clutter and facilitates synthesis and simulation. The beams may be for example straight beams.

D'autres types d'éléments compliants peuvent aussi être utilisés.Other types of compliant elements may also be used.

L'axe est monté à l'intersection entre lesdites poutres. Une ou de préférence deux extrémités de deux branches adjacentes de la croix peuvent être fixées au bâti du mouvement grâce à des points de montage prévus à cet effet. Les points de montage peuvent être par exemple des ouvertures pour le chassage ou le collage d'axes de fixation. La ou les extrémités de la ou des deux branches peuvent ainsi être fixes par rapport au bâti, tandis que l'extrémité des deux autres branches, ainsi que le point d'intersection, peuvent être mobiles lorsque les branches de l'élément compliant se déforment.The axis is mounted at the intersection between said beams. One or preferably two ends of two adjacent branches of the cross may be attached to the frame of the movement by means of mounting points provided for this purpose. The mounting points may for example be openings for the driving or gluing of fixing pins. The one or both ends of the one or both limbs can thus be fixed relative to the frame, while the end of the two other limbs, as well as the point of intersection, can be movable when the limbs of the compliant element are deformed. .

L'élément élastique de précontrainte permet d'exercer une force de précontrainte sur l'élément compliant de manière à modifier le couple nécessaire à la mise en rotation dudit axe. De manière préférentielle, la précontrainte est choisie de manière à minimiser le couple nécessaire à la mise en rotation de l'axe. La précontrainte est avantageusement exercée simultanément sur deux branches adjacentes de la croix de l'élément compliant.The elastic prestressing element makes it possible to exert a prestressing force on the compliant element so as to modify the torque necessary for the rotation of said axis. Preferably, the prestressing is chosen so as to minimize the torque necessary for the rotation of the axis. Prestressing is advantageously exercised simultaneously on two adjacent branches of the cross of the compliant element.

L'élément élastique de précontrainte peut être lié intégralement à l'élément compliant, ou même former un seul élément, ce qui facilite le montage et l'alignement.The elastic prestressing element may be integrally bonded to the compliant element, or even form a single element, which facilitates assembly and alignment.

Dans le cas préférentiel d'un élément compliant comportant deux poutres croisées formant une intersection en croix avec quatre branches en X, l'élément élastique de précontrainte peut exercer une force de précontrainte sur les deux extrémités de deux branches adjacentes de la croix.In the preferred case of a compliant element comprising two crossed beams forming a cross intersection with four branches in X, the elastic prestressing element can exert a prestressing force on both ends of two adjacent branches of the cross.

Cette force de précontrainte peut être exercée directement par l'élément élastique de précontrainte sur l'élément compliant.This prestressing force can be exerted directly by the elastic prestressing element on the compliant element.

Cette force de précontrainte peut être exercée par l'élément élastique de précontrainte sur l'élément compliant au travers d'une pièce d'appui au travers de deux branches. Cette solution a l'avantage de répartir la force de précontrainte sur les deux branches.This prestressing force can be exerted by the elastic prestressing element on the compliant element through a part support through two branches. This solution has the advantage of distributing the prestressing force on the two branches.

Cette force de précontrainte peut être exercée par l'élément élastique de précontrainte sur l'élément compliant au travers d'une pièce d'appui au travers de deux branches et d'une liaison articulée. Cette solution a l'avantage de permettre un déplacement relatif de l'élément élastique de précontrainte par rapport à l'élément compliant.This prestressing force can be exerted by the elastic prestressing element on the compliant element through a support piece through two branches and an articulated connection. This solution has the advantage of allowing a relative displacement of the elastic prestress element with respect to the compliant element.

L'élément élastique de précontrainte peut être conformé de manière à comporter deux brins. Une extrémité de chaque brin est liée rigidement à une extrémité d'une branche fixe de la croix, une autre portion de chaque brin exerce une force de précontrainte sur l'extrémité libre d'une autre branche de la croix. De préférence, l'élément élastique de précontrainte et l'élément compliant se trouve du moins en partie dans le même plan.The elastic prestressing element may be shaped so as to comprise two strands. One end of each strand is rigidly connected to one end of a fixed branch of the cross, another portion of each strand exerts a prestressing force on the free end of another branch of the cross. Preferably, the elastic prestress element and the compliant element is at least partly in the same plane.

L'élément élastique de précontrainte étant dimensionné et structuré de manière à exercer une force de précontrainte sensiblement constante sur l'élément compliant même lorsque l'élément compliant se déforme. Des calculs et des simulations ont démontré qu'une force de précontrainte constante permet de minimiser le couple nécessaire à la rotation de l'axe, et d'éviter que ce couple ne dépende de la position angulaire.The elastic prestressing element being dimensioned and structured so as to exert a substantially constant prestressing force on the compliant element even when the compliant element is deformed. Calculations and simulations have shown that a constant prestressing force makes it possible to minimize the torque necessary for the rotation of the axis, and to prevent this torque from being dependent on the angular position.

Les brins peuvent être liés l'un à l'autre de manière à former un anneau.The strands may be bonded to each other so as to form a ring.

L'axe peut être chassé et/ou collé dans l'ancre et/ou dans l'élément compliant.The axis can be driven out and / or glued in the anchor and / or in the compliant element.

Selon un aspect indépendant de l'invention, les buts susmentionnés sont atteints au moyen d'un élément oscillant pour mouvement horloger comportant :

  • une ancre;
  • un élément compliant qui permet à l'ancre de tourner lorsque l'élément compliant se déforme élastiquement ;
  • ledit élément compliant comportant au moins deux poutres déformables qui se croisent entre elles à distance de leurs extrémités, de manière à former une croix,
  • le centre de rotation de l'ancre étant au centre de ladite croix.
According to an independent aspect of the invention, the aforementioned aims are achieved by means of an oscillating element for a watch movement comprising:
  • an anchor;
  • a compliant element that allows the anchor to rotate when the compliant element deforms elastically;
  • said compliant element comprising at least two deformable beams which cross each other at a distance from their ends, so as to form a cross,
  • the center of rotation of the anchor being in the center of said cross.

Cette disposition des poutres en croix permet d'obtenir une symétrie centrale des forces exercées par les poutres déformables sur le point de rotation.This arrangement of the cross beams makes it possible to obtain a central symmetry of the forces exerted by the deformable beams on the point of rotation.

Dans ce cas, l'ancre et l'élément compliant peuvent être dans le même plan (au moins partiellement) sans être nécessairement liés entre eux par un axe. Alternativement, l'ancre et l'élément compliant peuvent se trouver dans des plans différents liés ensemble par un axe.In this case, the anchor and the compliant element may be in the same plane (at least partially) without necessarily being interconnected by an axis. Alternatively, the anchor and the compliant element can be in different planes linked together by an axis.

Dans ce cas également, au moins un élément élastique de précontrainte peut être prévu en option pour exercer une force de précontrainte sur l'élément compliant de manière à modifier le couple nécessaire à la mise en rotation du composant fonctionnel. Cet élément élastique de précontrainte peut agir par exemple sur les extrémités distales des poutres.In this case also, at least one elastic prestressing element may optionally be provided to exert a prestressing force on the compliant element so as to modify the torque necessary for rotating the functional component. This elastic prestressing element can act for example on the distal ends of the beams.

L'ancre peut être une ancre suisse pour échappement à ancre suisse.The anchor can be a Swiss anchor for Swiss anchor escapement.

Selon un aspect indépendant, l'invention concerne aussi un organe réglant comprenant une ancre oscillante compliante, par exemple une ancre oscillant grâce à un élément oscillant selon n'importe lequel des modes de réalisation décrits dans cette demande, fixé sur un porte-échappement qui porte aussi la roue d'échappement ainsi que, de préférence, l'axe de balancier avec le balancier et le spiral.According to an independent aspect, the invention also relates to a regulating member comprising a compliant oscillating anchor, for example an oscillating anchor by means of an oscillating element according to any of the embodiments described in this application, fixed on an exhaust door which also carries the escape wheel and, preferably, the balance shaft with the balance and the balance spring.

Brève description des figuresBrief description of the figures

Des exemples de mise en oeuvre de l'invention sont indiqués dans la description illustrée par les figures annexées dans lesquelles :Examples of implementation of the invention are indicated in the description illustrated by the appended figures in which:

La figure 1 illustre une vue en perspective d'un élément oscillant selon un premier mode de réalisation de l'invention.The figure 1 illustrates a perspective view of an oscillating element according to a first embodiment of the invention.

La figure 2 illustre une vue de dessus d'un élément oscillant selon le premier mode de réalisation de l'invention.The figure 2 illustrates a top view of an oscillating element according to the first embodiment of the invention.

La figure 3 illustre une vue de côté d'un élément oscillant selon l'invention.The figure 3 illustrates a side view of an oscillating element according to the invention.

La figure 4 illustre une vue en perspective d'un élément oscillant selon un deuxième mode de réalisation de l'invention.The figure 4 illustrates a perspective view of an oscillating element according to a second embodiment of the invention.

La figure 5 illustre une vue en perspective d'un élément oscillant selon un troisième mode de réalisation de l'invention.The figure 5 illustrates a perspective view of an oscillating element according to a third embodiment of the invention.

La figure 6 illustre une vue de dessus d'un élément oscillant selon un quatrième mode de réalisation de l'invention.The figure 6 illustrates a top view of an oscillating element according to a fourth embodiment of the invention.

La figure 7 est une vue en éclaté d'un élément oscillant selon un cinquième mode de réalisation de l'invention.The figure 7 is an exploded view of an oscillating element according to a fifth embodiment of the invention.

Exemple(s) de mode de réalisation de l'inventionExample (s) of embodiment of the invention

Un mode de réalisation particulier de l'invention va maintenant être décrit. Dans cet exemple préférentiel, le composant fonctionnel 2 que l'on souhaite faire osciller à une extrémité de l'axe 3 est une ancre, plus particulièrement une ancre suisse pour échappement à ancre suisse..A particular embodiment of the invention will now be described. In this preferred example, the functional component 2 that is to be oscillated at one end of the axis 3 is an anchor, more particularly a Swiss anchor for Swiss anchor escapement.

L'ancre 2 comporte dans cet exemple deux palettes 20A et 20B, une fourchette 21 et un dard 22. Elle peut être réalisée en acier ou avantageusement en silicium ou dans un autre matériau permettant une fabrication par l'un des procédés parmi les procédés de photolithographie, DRIE (abréviation pour « Deep Reactive Ion Etching ») ou LIGA (abréviation pour « Lithographie, Galvanoformung, Abformung »). Elle est montée sur une première extrémité de l'axe 3 par chassage, par exemple dans le cas d'une ancre métallique, ou par collage, par exemple dans le cas d'une ancre en silicium. Alternativement, l'axe 3 et l'ancre 2 peuvent être formés en une seule pièce. Une ancre intégrant les palettes et/ou le dard en un ensemble monolithique peut également être envisagée.The anchor 2 comprises in this example two pallets 20A and 20B, a fork 21 and a dart 22. It can be made of steel or advantageously in silicon or in another material allowing fabrication by one of the photolithography methods, DRIE (abbreviation for "Deep Reactive Ion Etching") or LIGA (abbreviation for "Lithography, Galvanoformung, Abformung"). It is mounted on a first end of the axis 3 by driving, for example in the case of a metal anchor, or by gluing, for example in the case of a silicon anchor. Alternatively, the axis 3 and the anchor 2 can be formed in one piece. An anchor integrating the pallets and / or the stinger into a monolithic assembly can also be envisaged.

L'axe 3 n'est pas un axe de mobile conventionnel qui pivote dans des paliers. A la place l'élément oscillant comporte, de préférence à l'autre extrémité de l'axe 3, un élément compliant 4. Dans le mode de réalisation des figures 1 à 3, l'élément compliant est du type en croix et comporte donc deux poutres rectilignes 5A, 5B qui se croisent en X. L'axe 3 est monté à l'intersection entre les deux poutres 5A, 5B, cette intersection étant coïncidente avec le centre de rotation de l'élément compliant. Des poutres non rectilignes peuvent être utilisées, y compris des poutres courbes ou coudées. Les quatre branches de la croix sont référencées par les numéros 7A à 7D.Axis 3 is not a conventional moving axle that pivots in bearings. Instead, the oscillating element preferably comprises at the other end of the axis 3 a compliant element 4. In the embodiment of Figures 1 to 3 the compliant element is of the cross type and therefore comprises two rectilinear beams 5A, 5B which intersect at X. The axis 3 is mounted at the intersection between the two beams 5A, 5B, this intersection being coincident with the center rotation of the compliant element. Non-rectilinear beams may be used, including curved or bent beams. The four branches of the cross are referenced by the numbers 7A to 7D.

Les extrémités distales de deux branches adjacentes 7A, 7B de la croix sont munies de points de fixation 6A, 6B pour les fixer sur une partie du bâti du mouvement, tel que la platine, un pont, un porte-échappement, ou une cage de tourbillon. Dans un mode de réalisation préférentiel, l'élément oscillant est fixé au moyen d'axes ou de goupilles ou de vis insérées dans ces deux points de fixation. L'élément oscillant peut être fixé sur un porte-échappement qui porte aussi la roue d'échappement ainsi que, de préférence, l'axe de balancier avec le balancier et le spiral. Cette configuration facilite l'alignement et le montage de divers composants de l'organe réglant.The distal ends of two adjacent branches 7A, 7B of the cross are provided with attachment points 6A, 6B to fix them on a part of the movement frame, such as the plate, a bridge, an exhaust door, or a cage of whirlwind. In a preferred embodiment, the oscillating element is fixed by means of pins or pins or screws inserted into these two attachment points. The oscillating element can be fixed on an exhaust-door which also carries the escape wheel and, preferably, the balance shaft with the balance and the hairspring. This configuration facilitates the alignment and mounting of various components of the regulating member.

Dans le mode de réalisation illustré, un élément de connexion 60 est lié intégralement à l'extrémité distale des deux branches 7A, 7B et muni de deux points de fixation 6A, 6B sous forme de trous traversants. Cette configuration permet notamment de déplacer les ponts de fixation par rapport aux poutres élastiques 5A, 5B dont la longueur déformable peut ainsi être maximisée.In the illustrated embodiment, a connecting member 60 is integrally bonded to the distal end of the two legs 7A, 7B and provided with two attachment points 6A, 6B in the form of through holes. This configuration allows in particular to move the fixing bridges with respect to the elastic beams 5A, 5B whose deformable length can thus be maximized.

Des simulations numériques ont démontré que le couple nécessaire pour faire tourner l'axe 3 peut être contrôlé, et par exemple réduit ou même minimisé, en exerçant constamment une force de contrainte sur les poutres 5A, 5B. Dans le mode de réalisation des figures 1 à 3, les deux branches 7C, 7D sont libres et opposées aux deux branches fixes 7A, 7B. Dans ce cas, une force de contrainte est exercée au moyen d'un élément élastique, ici d'un ressort annulaire définissant deux brins 80A, 80B. Cet élément élastique est avantageusement intégral avec les deux poutres 5A, 5B de la croix. Cette solution monolithique permet notamment de faciliter le montage et l'alignement des différents composants. On remarque qu'avec cette solution, le centre de rotation n'est pas complètement fixe, mais le déplacement de celui-ci est maîtrisé, répétable et généralement inférieur au jeu traditionnel d'un pivot d'une tige d'ancre conventionnelle dans une pierre, qui est typiquement entre 4µm à 14µm.Numerical simulations have demonstrated that the torque necessary to rotate the axis 3 can be controlled, and for example reduced or even minimized, by constantly exerting a force of stress on the beams 5A, 5B. In the embodiment of Figures 1 to 3 , the two branches 7C, 7D are free and opposite to the two fixed branches 7A, 7B. In this case, a force of stress is exerted by means of an elastic element, here of an annular spring defining two strands 80A, 80B. This elastic element is advantageously integral with the two beams 5A, 5B of the cross. This monolithic solution allows in particular to facilitate the assembly and alignment of the various components. Note that with this solution, the center of rotation is not completely fixed, but the displacement of it is controlled, repeatable and generally lower than the traditional game of a pivot of a conventional anchor rod in a stone, which is typically between 4μm to 14μm.

Les deux brins 80A, 80B partent de l'élément de connexion 60 près des extrémités fixes de la croix et entourent les deux poutres 5A, 5B de manière à exercer une force de précontraintes sur les extrémités distales des branches libres 7C, 7D. Plus particulièrement, une extrémité 81A, 81B de chaque brin est liée rigidement à une extrémité de chaque branche fixe 7A, 7B de la croix. Ils sont donc réunis en un seul anneau.The two strands 80A, 80B leave the connecting element 60 near the fixed ends of the cross and surround the two beams 5A, 5B so as to exert a prestressing force on the distal ends of the free branches 7C, 7D. More particularly, one end 81A, 81B of each strand is rigidly connected to one end of each fixed branch 7A, 7B of the cross. They are thus united in a single ring.

Dans cet exemple, l'élément élastique 80A, 80B appuie directement aux points 81C, 81 D contre les extrémités distales des branches 7C, 7D.In this example, the resilient member 80A, 80B bears directly at the points 81C, 81D against the distal ends of the branches 7C, 7D.

Dans un mode de réalisation préférentiel, la force de précontrainte est exercée par l'élément élastique 80A, 80B au travers d'une pièce d'appui 9 qui répartit et égalise la pression contre les deux branches 7C, 7D. Cette solution permet d'assurer une pression égale sur les deux branches 7C, 7D même en cas de légères différences de longueur dues par exemple aux imperfections de fabrication. L'élément d'appui 9 peut être intégral, monolithique avec les deux branches 7C, 7D.In a preferred embodiment, the prestressing force is exerted by the elastic element 80A, 80B through a support piece 9 which distributes and equalizes the pressure against the two branches 7C, 7D. This solution ensures equal pressure on the two branches 7C, 7D even in the case of slight differences in length due to example to imperfections of manufacture. The support element 9 may be integral, monolithic with the two branches 7C, 7D.

Un élément de liaison articulé 90 est avantageusement lié de façon pivotante d'une part aux brins 80A, 80B, d'autre part à la pièce d'appui 9. Cet élément de liaison garantit une distance constante entre ces deux éléments tout en permettant une rotation par rapport aux lames 80A, 80B et par rapport à la pièce 9. Dans l'exemple illustré, il a une forme d'os avec une tête, ou épiphyse, approximativement hémisphérique à chaque extrémité d'une partie centrale. Chaque tête collabore avec une coupole correspondante dans les brins 80A, 80B respectivement dans la pièce d'appui 9.An articulated connecting element 90 is advantageously pivotally connected on the one hand to the strands 80A, 80B, on the other hand to the support piece 9. This connecting element guarantees a constant distance between these two elements while allowing a rotation in relation to the blades 80A, 80B and relative to the part 9. In the illustrated example, it has a bone shape with a head, or epiphysis, approximately hemispherical at each end of a central portion. Each head collaborates with a corresponding dome in the strands 80A, 80B respectively in the support piece 9.

La force de précontrainte exercée par les brins 80A, 80B dépend de la longueur de l'élément de liaison 90 et du déplacement qu'il provoque sur la pièce d'appui 9 et sur les extrémités des branches 7C, 7D. Pour une production en série, un élément oscillant peut être livré avec plusieurs éléments de liaison de différentes longueurs pour ajuster la force de précontrainte. Le montage de l'élément oscillant peut comprendre le choix d'un élément de liaison 90 de longueur adaptée parmi plusieurs éléments de liaison de différentes longueurs. Dans un mode de réalisation préférentiel, la longueur idéale de l'élément de liaison 90 est déterminée par simulation numérique une fois pour toutes lors de la conception, et appliquée.The prestressing force exerted by the strands 80A, 80B depends on the length of the connecting element 90 and the displacement it causes on the support piece 9 and on the ends of the branches 7C, 7D. For series production, an oscillating element can be delivered with several connecting elements of different lengths to adjust the prestressing force. The mounting of the oscillating element may comprise the choice of a connecting element 90 of suitable length among several connecting elements of different lengths. In a preferred embodiment, the ideal length of the connecting member 90 is determined by digital simulation once and for all during the design, and applied.

L'élément compliant est donc constitué dans cet exemple de deux pièces : la structure en croix 5A, 5B avec l'élément élastique 80A, 80B ainsi que les éléments 9 et 60 ; et l'élément de liaison 90. Comme dans les autres variantes décrites plus loin, ces deux pièces peuvent être réalisées en acier, en silicium, etc.The compliant element is therefore constituted in this example of two parts: the cross structure 5A, 5B with the elastic element 80A, 80B and the elements 9 and 60; and the connecting element 90. As in the other variants described below, these two parts can be made of steel, silicon, etc.

La figure 4 illustre une deuxième variante d'élément oscillant 1 pour mouvement horloger. Le composant 2 oscillant est une ancre, représentée sans ses palettes mais qui pourrait naturellement être équipée de palettes.The figure 4 illustrates a second variant of oscillating element 1 for watch movement. The oscillating component 2 is an anchor, represented without its pallets but which could naturally be equipped with pallets.

Dans cette variante, l'élément compliant 4 comporte trois poutres flexibles 5C, 5D 5E en étoile autour de l'axe 3. L'élément élastique de précontrainte 8 est constitué par trois brins 80C, 80D, 80E formant un triangle, par exemple un triangle équilatéral. Les extrémités des trois poutres sont liées aux trois pointes respectives du triangle.In this variant, the compliant element 4 comprises three flexible beams 5C, 5D 5E star about the axis 3. The elastic prestressing element 8 is constituted by three strands 80C, 80D, 80E forming a triangle, for example a equilateral triangle. The ends of the three beams are connected to the three respective points of the triangle.

La précontrainte s'exerce donc de la même façon sur toutes les trois poutres 5C à 5E. L'extrémité des trois poutres n'est pas bloquée. Un avantage est notamment que le centre de l'axe 3 reste quasiment immobile même lors de rotation de la pièce 2.Prestressing is therefore exerted in the same way on all three beams 5C to 5E. The end of the three beams is not blocked. One advantage is that the center of the axis 3 remains almost immobile even during rotation of the part 2.

L'élément oscillant 1 est fixé au bâti du mouvement par les trois points de montage 6C, 6D, 6E directement sur l'élément de précontrainte 80C à 80E. Dans cet exemple, les points de montage sont liés aux milieux des brins 80C à 80E. Dans cette variante, c'est un déplacement appliqué sur les brins 80C à 80E qui crée la contrainte. Il n'y a pas de pièce d'appui (« os »).The oscillating element 1 is fixed to the frame of the movement by the three mounting points 6C, 6D, 6E directly on the prestressing element 80C to 80E. In this example, the mounting points are linked to the media of the strands 80C to 80E. In this variant, it is a displacement applied on the strands 80C to 80E which creates the constraint. There is no support piece ("bone").

Des éléments compliants avec un nombre de bras en étoile différent de trois peuvent être envisagés, par exemple des éléments compliants avec 2, 4, 5, .. N bras en étoile autour de l'axe 3. L'espace angulaire entre les différents ras est de préférence constant et égal à 360°/N.Compliant elements with a number of star arms different from three can be envisaged, for example compliant elements with 2, 4, 5, .. N star arms around the axis 3. The angular space between the different ras is preferably constant and equal to 360 ° / N.

La figure 5 illustre une troisième variante d'élément compliant 4 destiné à être intégré dans un élément oscillant pour mouvement horloger. Comme dans la première variante, l'élément compliant 4 comporte deux poutres 5A, 5B formant une croix autour de l'axe 3. Le composant oscillant, par exemple une ancre d'échappement non représentée, est destiné être monté sur l'axe 3 dans un autre plan que l'élément compliant 4.The figure 5 illustrates a third compliant element variant 4 intended to be integrated in an oscillating element for a watch movement. As in the first variant, the compliant element 4 comprises two beams 5A, 5B forming a cross about the axis 3. The oscillating component, for example an exhaust anchor not shown, is intended to be mounted on the axis 3 in another plane than the compliant element 4.

Les deux poutres 5A, 5B en X forment quatre branches 7A à 7D dont les extrémités sont liées deux par deux grâce aux éléments de connexion 60 respectivement 61.The two beams 5A, 5B X form four branches 7A to 7D whose ends are connected in pairs thanks to the connecting elements 60 and 61, respectively.

Un élément élastique de précontrainte 8 en anneau comporte deux brins 80A, 80B qui rejoignent le centre de l'élément de connexion 60 avec le centre de l'élément de connexion 61, en formant un anneau. Cet élément élastique 8 exerce une force de précontrainte directement sur les extrémités distales des quatre branches 7A à 7D. Plus particulièrement, une extrémité 81 A, 81 B de chaque brin est liée rigidement à une extrémité de chaque branche fixe 7A, 7B de la croix. Aucune pièce de liaison 9 n'est utilisée entre l'élément de précontrainte et les éléments de connexion 60, 61.A resilient ring preload member 8 has two strands 80A, 80B which join the center of the connecting member 60 with the center of the connecting member 61, forming a ring. This elastic element 8 exerts a prestressing force directly on the distal ends of the four branches 7A to 7D. More particularly, one end 81 A, 81 B of each strand is rigidly connected to one end of each fixed branch 7A, 7B of the cross. No connecting part 9 is used between the prestressing element and the connecting elements 60, 61.

L'élément compliant 4 est monté sur le bâti du mouvement grâce à deux points de montage 6F, 6G directement sur l'élément de contrainte 8, par exemple au milieu des brins 80A respectivement 80B. Comme la seconde variante, l'amplitude de la force de précontrainte est identique sur toutes les poutres. Le centre de l'axe 3 reste donc immobile même lors de rotation de la pièce 2.The compliant element 4 is mounted on the movement frame by two mounting points 6F, 6G directly on the constraining element 8, for example in the middle of the strands 80A respectively 80B. Like the second variant, the amplitude of the prestressing force is identical on all the beams. The center of the axis 3 remains motionless even when rotating the workpiece 2.

La figure 6 illustre une quatrième variante d'élément compliant 4 destiné à être intégré dans un élément oscillant pour mouvement horloger. Cette variante correspond à la troisième variante, si ce n'est que les extrémités libres des quatre branches 7A à 7D sont liées à l'élément de précontrainte 8 au moyen de deux pièces d'appui 9A, 9B reliant les branches deux à deux, et d'éléments de liaison en forme d'os 90A, 90B liant ces pièces d'appui 9A, 9B aux brins 80A, 80B de l'élément de précontrainte. Ces éléments de liaison permettent un déplacement selon plusieurs degrés de liberté de l'élément de précontrainte 8 par rapport aux pièces d'appui 9A, 9B et par rapport à l'extrémité de poutres. Dans cette variante, c'est un déplacement appliqué sur les pièces d'appui 9A, 9B qui crée la contrainte.The figure 6 illustrates a fourth compliant element variant 4 intended to be integrated in an oscillating element for watch movement. This variant corresponds to the third variant, except that the free ends of the four branches 7A to 7D are connected to the prestressing element 8 by means of two support pieces 9A, 9B connecting the branches two by two, and bone-shaped connecting members 90A, 90B bonding these support members 9A, 9B to the strands 80A, 80B of the prestressing member. These connecting elements allow a displacement according to several degrees of freedom of the prestressing element 8 relative to the support parts 9A, 9B and with respect to the end of beams. In this variant, it is a displacement applied on the support pieces 9A, 9B which creates the constraint.

La forme et la structure de l'élément élastique est optimisée, par exemple par approximations successives, de manière à ce que la force de précontrainte reste sensiblement constante même lorsque les différentes poutres de l'élément compliant se déforment, dans toute la plage de déformation usuelle. On garantit ainsi que le couple de rappel exercé sur l'axe 3 soit indépendant de sa position angulaire. Dans un mode de réalisation, l'épaisseur des brins 80A, 80B est irrégulière afin d'atteindre cet objectif.The shape and structure of the elastic element is optimized, for example by successive approximations, so that the prestressing force remains substantially constant even when the various beams of the compliant element are deformed, throughout the deformation range. usual. This ensures that the restoring torque exerted on the axis 3 is independent of its angular position. In a mode of realization, the thickness of the strands 80A, 80B is irregular in order to achieve this objective.

La figure 7 illustre une cinquième variante d'élément compliant 4 destiné à être intégré dans un élément oscillant pour mouvement horloger. Cette variante se distingue de celle de la figure 5 principalement par la forme de l'élément élastique de précontrainte ; les autres éléments peuvent être identiques à ceux décrits en relation avec la figure 5 et ne seront donc pas décrits.The figure 7 illustrates a fifth variant compliant element 4 intended to be integrated in an oscillating element for watch movement. This variant is different from that of the figure 5 mainly by the shape of the elastic prestressing element; the other elements may be identical to those described in relation to the figure 5 and will not be described.

L'élément élastique de précontrainte 8 est formé de deux bras 80A, 80B qui ne se rejoignent pas directement, mais relient entre eux des paires de points sur les éléments de connexion 60, 61. Plus précisément, le bras 80B relie le point 600 près d'une extrémité de l'élément de connexion 60 avec le point 610 près de l'extrémité correspondante de l'autre élément de connexion 61 ; le bras 80A relie le point 601 près d'une extrémité de l'élément de connexion 60 avec le point 611 près de l'extrémité correspondante de l'autre élément de connexion 61The elastic prestressing element 8 is formed of two arms 80A, 80B which do not meet directly, but connect pairs of points on the connecting elements 60, 61. More specifically, the arm 80B connects the point 600 near one end of the connecting member 60 with the point 610 near the corresponding end of the other connecting member 61; the arm 80A connects the point 601 near one end of the connection element 60 with the point 611 near the corresponding end of the other connection element 61

Les points de montage 6H, 6I de l'élément de contrainte 8 sur le bâti se trouvent sur l'élément de précontrainte 8, comme dans la figure 5. Toutefois, ces points de montage ne sont pas directement au milieu des brins 80A, 80B, mais sont reliés à ces brins par des éléments élastiques 80C respectivement 80D. Dans cet exemple, chacun des éléments élastiques 80C, 80D est constitué par un anneau dont un point est lié à un brin 80A, respectivement 80D, et un autre point à 180° est lié à un côté d'un point de montage 6H, 6I opposé au brin. De cette manière, les points de montage 6H, 6I ne limitent pas ou quasiment pas la liberté des brins 80A, 80B de se déplacer, ce qui permet à l'élément de contrainte 8 dans son ensemble d'exercer une contrainte plus importante sur l'élément compliant 4.The mounting points 6H, 6I of the constraint element 8 on the frame are on the prestressing element 8, as in FIG. figure 5 . However, these mounting points are not directly in the middle of the strands 80A, 80B, but are connected to these strands by elastic elements 80C respectively 80D. In this example, each of the resilient members 80C, 80D is constituted by a ring one point of which is linked to a strand 80A, respectively 80D, and another point at 180 ° is bound to one side of a mounting point 6H, 6I opposite to the strand. In this way, the mounting points 6H, 6I do not limit or almost no freedom of the strands 80A, 80B to move, which allows the constraint element 8 as a whole to exert a greater stress on the compliant element 4.

Comme illustré sur la figure 7, l'élément compliant 4 peut être assemblé sur une plaquette 11 réalisée par exemple en LIGA et comportant des plots 110 destinés à recevoir les points de montage 6H, 6I. La plaquette 11 peut être montée sur le bâti du mouvement ou faire partie de ce bâti. Cette plaquette 11 permet d'obtenir un meilleur contrôle de la précontrainte appliquée sur l'élément compliant 4 par une meilleure précision des entraxes entre les plots 110. Plus particulièrement, les plots 110 et la plaquette 11 forment de préférence une seule même pièce, ainsi les erreurs d'alignement lors du montage peuvent être pratiquement. De plus, on obtient une plus grande facilité d'assemblage de l'ensemble sur le bâti du mouvement, et donc le remplacement de cet ensemble si besoin. Finalement, cette plaquette peut être intégrée à un porte échappement, et elle peut servir pour le réglage de la position de l'ancre en déplaçant la plaquette sur le bâti du mouvement. Cette plaquette 11 peut être utilisée en combinaison avec des éléments oscillants différents de celui de la figure 7, par exemple avec un élément oscillant selon n'importe quel mode de réalisation selon l'une des figures 1 à 6.As illustrated on the figure 7 , the compliant element 4 can be assembled on a wafer 11 made for example of LIGA and having pads 110 for receiving the mounting points 6H, 6I. The plate 11 may be mounted on the frame of the movement or be part of this frame. This plate 11 makes it possible to obtain better control of the prestressing applied to the compliant element 4 by better precision of the spacings between the studs 110. More particularly, the studs 110 and the plate 11 preferably form one single piece, as well as misalignment during assembly can be practically. In addition, we obtain a greater ease of assembly of the assembly on the frame of the movement, and therefore the replacement of this set if necessary. Finally, this plate can be integrated into an exhaust door, and it can be used to adjust the position of the anchor by moving the plate on the movement frame. This plate 11 may be used in combination with oscillating elements different from that of the figure 7 , for example with an oscillating element according to any embodiment according to one of the Figures 1 to 6 .

Tous les modes de réalisation décrits plus haut comportant un élément compliant dans un premier plan relié par un axe à une ancre en tant que composant fonctionnel dans un autre plan. Il est possible de modifier ces modes de réalisation de manière à ce que l'élément compliant et l'ancre se trouvent intégralement ou en partie dans le même plan.All embodiments described above have a compliant element in a first plane connected by an axis to an anchor as a functional component in another plane. It is possible to modify these embodiments so that the compliant element and the anchor are wholly or partly in the same plane.

Par exemple, il est possible de prévoir un élément oscillant pour mouvement horloger comportant une ancre, un élément compliant dans le même plan et qui permet à cette ancre de tourner lorsque l'élément compliant se déforme élastiquement, et au moins un élément élastique de précontrainte qui exerce une force de précontrainte sur l'élément compliant de manière à modifier le couple nécessaire à la mise en rotation de l'ancre.For example, it is possible to provide an oscillating element for a watch movement comprising an anchor, a compliant element in the same plane and which allows this anchor to rotate when the compliant element is deformed elastically, and at least one elastic prestressing element. which exerts a prestressing force on the compliant element so as to modify the torque necessary for the rotation of the anchor.

L'élément élastique de précontrainte peut se trouver dans le même plan que l'élément compliant, et/ou dans le même plan que l'ancre, ou dans un autre plan.The elastic prestress element may be in the same plane as the compliant element, and / or in the same plane as the anchor, or in another plane.

Dans ce cas, l'ancre et l'élément compliant peuvent être dans le même plan (au moins partiellement) sans être nécessairement liés entre eux par un axe. Alternativement, l'ancre et l'élément compliant peuvent se trouver dans des plans différents liés ensemble par un axe.In this case, the anchor and the compliant element may be in the same plane (at least partially) without necessarily being interconnected. by an axis. Alternatively, the anchor and the compliant element can be in different planes linked together by an axis.

De la même façon, il est aussi possible de réaliser un élément oscillant pour mouvement horloger comportant un élément compliant 4 formé de plusieurs poutres 5A, 5B qui se croisent, le point d'intersection des poutres définissant un centre de rotation pour l'ancre dans le même plan ou dans un autre plan que l'élément compliant. Le nombre de poutres peut être de deux, trois, etc. Les poutres sont avantageusement disposées symétriquement autour du centre de rotation. Un élément élastique de précontrainte 8 peut être prévu en option pour exercer une force de précontrainte sur les extrémités distales des poutres, de manière à modifier le couple nécessaire à la mise en rotation de l'ancre.In the same way, it is also possible to produce an oscillating element for a watch movement comprising a compliant element 4 formed of several intersecting beams 5A, 5B, the intersection point of the beams defining a center of rotation for the anchor in the same plane or in a different plane than the compliant element. The number of beams can be two, three, etc. The beams are advantageously arranged symmetrically around the center of rotation. An elastic prestressing element 8 may optionally be provided to exert a prestressing force on the distal ends of the beams, so as to modify the torque necessary for the rotation of the anchor.

Claims (15)

Elément oscillant (1) pour mouvement horloger comportant : un axe (3) ; une ancre (2) montée sur une première partie dudit axe (3) de manière à pouvoir tourner avec ledit axe ; un élément compliant (4) monté sur une deuxième partie de l'axe (3) de manière à permettre à cet axe de tourner lorsque ledit élément compliant se déforme élastiquement ; l'élément compliant (4) comportant plusieurs poutres flexibles (5A, 5B,5C,5D,5E) formant une intersection, ledit axe (3) étant monté à l'intersection entre lesdites poutres; un élément élastique de précontrainte (8) pour exercer une force de précontrainte sur l'élément compliant (4) de manière à modifier le couple nécessaire à la mise en rotation dudit axe (3) ; ledit élément élastique de précontrainte (8) comportant au moins deux brins (80A, 80B) ; une extrémité (81 A, 81B) de chaque brin étant liée à une extrémité d'une desdites poutres. Oscillating element (1) for a watch movement comprising: an axis (3); an anchor (2) mounted on a first portion of said axis (3) so as to be rotatable with said axis; a compliant element (4) mounted on a second part of the axis (3) so as to allow this axis to rotate when said compliant element deforms elastically; the compliant element (4) comprising a plurality of flexible beams (5A, 5B, 5C, 5D, 5E) forming an intersection, said axis (3) being mounted at the intersection between said beams; an elastic prestressing element (8) for exerting a prestressing force on the compliant element (4) so as to modify the torque necessary for the rotation of said axis (3); said elastic prestressing member (8) having at least two strands (80A, 80B); one end (81 A, 81 B) of each strand being bonded to one end of one of said beams. Elément selon la revendication 1, lesdits brins (80A, 80B) étant appuyés contre deux extrémités libres adjacentes de deux poutres par l'intermédiaire d'une pièce d'appui (9).Element according to claim 1, said strands (80A, 80B) being supported against two adjacent free ends of two beams by means of a support piece (9). Elément selon la revendication 2, comprenant au moins un point de montage (6A-6B) pour monter ledit élément oscillant sur un bâti du mouvement horloger,
ledit point de montage étant lié à ladite pièce d'appui (9).Element according to claim 2, comprising at least one mounting point (6A-6B) for mounting said oscillating element on a frame of the watch movement,
said mounting point being connected to said support piece (9). Elément selon l'une des revendications 1 ou 2, comprenant au moins un point de montage (6C-6D ; 6F-6G, 6H-6I) pour monter ledit élément oscillant sur un bâti du mouvement horloger,
ledit point de montage étant lié à l'élément élastique de précontrainte (8).Element according to one of claims 1 or 2, comprising at least one mounting point (6C-6D; 6F-6G, 6H-6I) for mounting said oscillating element on a frame of the watch movement,
said mounting point being bonded to the resilient biasing member (8). Elément selon la revendication 4, ledit au moins un point de montage (6H-6I) étant lié via une liaison élastique (80C, 80D) audit élément élastique de précontrainte (8).An element according to claim 4, said at least one mounting point (6H-6I) being connected via an elastic connection (80C, 80D) to said elastic prestressing element (8). Elément selon la revendication 4, ledit au moins un point de montage (6F-6G) étant prévu dans ledit élément élastique de précontrainte (8).An element according to claim 4, said at least one mounting point (6F-6G) being provided in said resilient biasing member (8). Elément selon l'une des revendications 1 à 6, ledit élément élastique de précontrainte (8) et l'élément compliant (4) formant un seul composant.Element according to one of claims 1 to 6, said elastic prestress element (8) and the compliant element (4) forming a single component. Elément selon l'une des revendications 1 à 7, l'élément compliant (4) comportant deux dites poutres (5A, 5B) formant une intersection en croix avec quatre branches (7A, 7B, 7C, 7D), ledit élément élastique de précontrainte (8) exerçant une force de précontrainte sur les deux extrémités d'exactement deux branches adjacentes (7C, 7D) de ladite croix.Element according to one of claims 1 to 7, the compliant element (4) comprising two said beams (5A, 5B) forming a cross intersection with four branches (7A, 7B, 7C, 7D), said elastic prestressing element (8) exerting a prestressing force on both ends of exactly two adjacent branches (7C, 7D) of said cross. Elément selon l'une des revendications 1 à 7, l'élément compliant (4) comportant deux dites poutres (5A, 5B) formant une intersection en croix avec quatre branches (7A, 7B, 7C, 7D), ledit élément élastique de précontrainte (8) exerçant une force de précontrainte sur les extrémités de chacune de ces quatre branches.Element according to one of claims 1 to 7, the compliant element (4) comprising two said beams (5A, 5B) forming a cross intersection with four branches (7A, 7B, 7C, 7D), said elastic prestressing element (8) exerting a prestressing force on the ends of each of these four branches. Elément selon l'une des revendications 1 à 7, l'élément compliant (4) comportant trois branches en étoile (5A à 5C), ledit élément élastique de précontrainte (8) exerçant une force de précontrainte sur les extrémités libres de chacune de ces trois branches.Element according to one of claims 1 to 7, the compliant element (4) comprising three star branches (5A to 5C), said elastic prestressing element (8) exerting a prestressing force on the free ends of each of these elements. three branches. Elément selon l'une des revendications 1 à 10, ladite pièce d'appui (9) étant liée auxdits brins (80A, 80B) par l'intermédiaire d'une liaison articulée (90).Element according to one of claims 1 to 10, said support piece (9) being bonded to said strands (80A, 80B) via an articulated connection (90). Elément selon l'une des revendications 1 à 11, lesdits brins (80A, 80B) étant liés l'un à l'autre de manière à former un anneau.Element according to one of claims 1 to 11, said strands (80A, 80B) being bonded to each other so as to form a ring. Elément selon l'une des revendications 2 à 12, comportant une première pièce d'appui (60) en appui simultané contre deux extrémités (7A, 7B) adjacentes desdites poutres, une deuxième pièce d'appui (61) en appui simultané contre deux autres extrémités (7C, 7D) adjacentes desdites poutres, chacun desdits brins (80A, 80B) reliant la première pièce d'appui (60) avec la deuxième pièce d'appui (61).Element according to one of claims 2 to 12, comprising a first bearing part (60) simultaneously bearing against two adjacent ends (7A, 7B) of said beams, a second support piece (61) bearing simultaneously against two other adjacent ends (7C, 7D) of said beams, each of said strands (80A, 80B) connecting the first support piece (60) with the second support piece (61). Elément selon l'une des revendications 1 à 13, ledit élément élastique de précontrainte (80A, 80B) étant dimensionné et structuré de manière à exercer une force de précontrainte sensiblement constante sur l'élément compliant (5A, 5B) même lorsque l'élément compliant se déforme.Element according to one of claims 1 to 13, said elastic prestressing element (80A, 80B) being dimensioned and structured so as to exert a substantially constant prestressing force on the compliant element (5A, 5B) even when the element compliant is deformed. Elément selon l'une des revendications précédentes, l'axe (3) étant chassé ou collé dans l'ancre et/ou dans l'élément compliant.Element according to one of the preceding claims, the axis (3) being driven or glued in the anchor and / or in the compliant element.
EP14197767.8A 2013-12-12 2014-12-12 Oscillating element for a clockwork Active EP2887151B1 (en)

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CH02055/13A CH708937B1 (en) 2013-12-12 2013-12-12 Oscillating element for watch movement.

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EP3182214A1 (en) * 2015-12-16 2017-06-21 Société anonyme de la Manufacture d'Horlogerie Audemars Piguet & Cie Mechanical oscillator for timepiece, adjustment mechanism comprising said mechanical oscillator, and clock movement
WO2017102917A1 (en) * 2015-12-16 2017-06-22 Société Anonyme de la Manufacture d'Horlogerie Audemars Piguet & Cie Mechanical oscillator for timepiece, adjustment mechanism including said mechanical oscillator, and clock movement
EP3761122A1 (en) * 2019-07-04 2021-01-06 Dominique Renaud SA Timepiece escapement component, associated escapement mechanism and timepiece

Also Published As

Publication number Publication date
CH708937A1 (en) 2015-06-15
EP2887151B1 (en) 2017-10-18
EP2887151A3 (en) 2016-06-29
CH708937B1 (en) 2020-03-31

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