EP4357857A1 - Hairspring for timepiece resonator mechanism provided with means for adjusting the stiffness - Google Patents

Hairspring for timepiece resonator mechanism provided with means for adjusting the stiffness Download PDF

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Publication number
EP4357857A1
EP4357857A1 EP22202267.5A EP22202267A EP4357857A1 EP 4357857 A1 EP4357857 A1 EP 4357857A1 EP 22202267 A EP22202267 A EP 22202267A EP 4357857 A1 EP4357857 A1 EP 4357857A1
Authority
EP
European Patent Office
Prior art keywords
force
spiral spring
flexible element
ribbon
elongated flexible
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP22202267.5A
Other languages
German (de)
French (fr)
Inventor
Ivan Hernandez
Romain Le Moal
Roberto Frosio
Pierre Cusin
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.)
Omega SA
Original Assignee
Omega SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Omega SA filed Critical Omega SA
Priority to EP22202267.5A priority Critical patent/EP4357857A1/en
Priority to US18/474,448 priority patent/US20240126209A1/en
Priority to JP2023172639A priority patent/JP2024059581A/en
Priority to CN202311358329.0A priority patent/CN117908351A/en
Publication of EP4357857A1 publication Critical patent/EP4357857A1/en
Pending legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/32—Component parts or constructional details, e.g. collet, stud, virole or piton
    • G04B17/34—Component parts or constructional details, e.g. collet, stud, virole or piton for fastening the hairspring onto the balance
    • G04B17/345—Details of the spiral roll
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/04—Oscillators acting by spring tension
    • G04B17/06—Oscillators with hairsprings, e.g. balance
    • G04B17/066—Manufacture of the spiral spring
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/04—Oscillators acting by spring tension
    • G04B17/06—Oscillators with hairsprings, e.g. balance
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/32—Component parts or constructional details, e.g. collet, stud, virole or piton
    • G04B17/325—Component parts or constructional details, e.g. collet, stud, virole or piton for fastening the hairspring in a fixed position, e.g. using a block
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/32—Component parts or constructional details, e.g. collet, stud, virole or piton
    • G04B17/34—Component parts or constructional details, e.g. collet, stud, virole or piton for fastening the hairspring onto the balance
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B18/00—Mechanisms for setting frequency
    • G04B18/02—Regulator or adjustment devices; Indexing devices, e.g. raquettes
    • G04B18/023—Regulator or adjustment devices; Indexing devices, e.g. raquettes with means for fine adjustment of the indexing device
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B18/00—Mechanisms for setting frequency
    • G04B18/02—Regulator or adjustment devices; Indexing devices, e.g. raquettes
    • G04B18/026—Locking the hair spring in the indexing device, e.g. goupille of the raquette

Definitions

  • the invention relates to a spiral spring for a watch resonator mechanism, the spiral spring being provided with means for adjusting the stiffness of said spiral spring.
  • the invention also relates to a watch resonator mechanism provided with such a spiral spring.
  • the sprung balance constitutes the time base of the watch. It is also called a resonator.
  • the balance spring must generally be adjustable to improve the accuracy of a watch.
  • means are used for adjusting the stiffness of the spiral spring, such as a racket to modify the effective length of the spring.
  • the effectiveness of a traditional snowshoe for adjusting gait remains limited, and it is not always effective in making the adjustment sufficiently precise, of the order of a few seconds or a few tens of seconds per day.
  • adjustment means comprising one or more screws arranged in the rim of the balance wheel.
  • screws By acting on the screws, we modify the inertia of the balance, which has the effect of modifying its course.
  • this adjustment mode is not easy to carry out, because it disrupts the balancing of the balance, and still does not make it possible to obtain sufficient fineness of adjustment of the operation of the oscillator.
  • the aim of the present invention is to overcome all or part of the drawbacks mentioned above, by proposing a spiral spring provided with effective and precise adjustment means, configured in particular to adjust the rate of a timepiece by modifying the stiffness effective of said hairspring.
  • the invention relates to a spiral spring, in particular for a watch resonator mechanism, the spiral spring comprising a flexible ribbon wound on itself in several turns, the ribbon having a predefined stiffness, the spring -spiral comprising means for adjusting its stiffness, the adjustment means comprising a single elongated flexible element arranged in series with the ribbon, the elongated flexible element connecting one end of said ribbon to a fixed support, so as to add stiffness additional to the ribbon, the adjustment means comprising prestressing means to apply at least two different forces on the elongated flexible element.
  • the invention is remarkable in that the prestressing means comprise a first lever attached to the end of the ribbon to be able to adjust a first force, the prestressing means comprising a second lever also attached to the end of the ribbon to be able to adjust a second effort independently of the first effort.
  • the invention it is possible to modify the stiffness of the elongated flexible element, such as a flexible blade.
  • the stiffness of the elongated flexible element With a single effort applied, whether force or torque, the stiffness of the elongated flexible member remains the same. With two perpendicular forces on the blade, longitudinally and orthogonally, we obtain an overall force, which varies the stiffness of the elongated flexible element. With a force and a torque, we also modify the stiffness. The combination of two efforts is essential to succeed in modifying the stiffness.
  • the intensity level of the stress is modulated, which results in a modification of the stiffness of the assembly comprising the flexible element and the ribbon.
  • the flexible element placed in series with the ribbon provides additional stiffness, which combines with that of the ribbon.
  • a flexible element in series of the ribbon is placed between one end of the ribbon and the fixed support.
  • This flexible element provides additional adjustable stiffness between the ribbon and the ribbon attachment point, and thus provides additional flexibility to the resonator.
  • the effective stiffness of the resonator includes the stiffness of the ribbon and the stiffness of the flexible element.
  • Variable forces are then applied to pre-stress the flexible element, preferably without pre-stressing the ribbon.
  • pre-stressing the flexible element By pre-stressing the flexible element, its stiffness changes, while the stiffness of the ribbon remains substantially unchanged.
  • the stiffness of the resonator changes, which consequently modifies the operation of the resonator.
  • the two levers each allow preload adjustment to be made independently of each other, so that a more precise adjustment is obtained.
  • the levers are different from each other, we obtain two settings of different intensities.
  • the first force is provided either by a first traction/compression force directed substantially in the longitudinal direction of the elongated flexible element, or by a first force directed substantially in a direction substantially orthogonal to the longitudinal direction of the elongated flexible element, or by a first torque, preferably a bending moment, so as to vary the stiffness of the elongated flexible element as a function of the prestress level.
  • the second force is provided either by a second traction/compression force directed substantially in the longitudinal direction of the elongated flexible element, or by a second force directed substantially in a substantially orthogonal direction to the longitudinal direction of the elongated flexible element, or by a second torque, preferably a bending moment, so as to vary the stiffness of the elongated flexible element as a function of the prestress level.
  • the prestressing means are configured to exert a third force on the elongated flexible element, the third force being provided, respectively to the first force, either by a force directed substantially in a direction substantially orthogonal to the longitudinal direction of the elongated flexible element, or by a torque, preferably a bending moment .
  • the prestressing means are configured to exert a third force on the elongated flexible element, the third force being provided, respectively to the first force, either by the first traction/compression force, either by the first substantially orthogonal force, or by the first couple.
  • the third effort is adjustable by the first lever.
  • the third effort is adjustable by the first lever.
  • the prestressing means are configured to exert a fourth force on the elongated flexible element, the fourth force being supplied, respectively to the second force, either by the second traction/compression force, either by the second substantially orthogonal force, or by the second couple.
  • the fourth effort is adjustable by the second lever.
  • the prestressing means are configured to exert a fifth force on the elongated flexible element, the fifth force being supplied, respectively to the first force and to the third force, or by the first force of traction/compression, either by the first substantially orthogonal force, or by the first couple.
  • the fifth effort is adjustable by the first lever.
  • the prestressing means are configured to exert a sixth force on the elongated flexible element, the sixth force being provided, respectively to the second and to the fourth force, or by the second traction force /compression, either by the second substantially orthogonal force, or by the second couple.
  • the sixth effort is adjustable by the second lever.
  • the longitudinal flexible element is a single flexible blade.
  • the flexible element is arranged in a radial direction of the spiral spring.
  • the first and the second lever are flexible.
  • the first and the second are curved and surround at least partly the wound ribbon.
  • the first and the second lever comprise a first free end actuable by a movement of said first free end in order to apply said forces on the elongated flexible element.
  • the second lever comprises a second free end actuable by a movement of said second free end in order to apply said forces on the elongated flexible element.
  • the end of the ribbon comprises an appendage, the prestressing means and the elongated flexible element being joined to the appendage.
  • the longitudinal force(s), and possibly the torque are continuously adjustable by the prestressing means.
  • the flexible element is arranged at an external end of the ribbon.
  • the end of the ribbon is more rigid than the elongated flexible element and the ribbon.
  • the elongated flexible element and the levers are arranged at an external end of the ribbon.
  • the elongated flexible element comprises a flexible neck.
  • the first and the second lever are configured to allow adjustment of the effort(s) to different intensities.
  • the first and the second lever have a stiffness or a section different from one another.
  • the invention also relates to a rotary resonator mechanism, in particular for a watch movement, comprising an oscillating mass and such a spiral spring.
  • FIG. 1 shows a schematic representation of an embodiment of a spiral spring 1, in particular for a watch resonator mechanism.
  • the spiral spring 1 extends substantially in the same plane.
  • the spiral spring 1 comprises a flexible ribbon 2 wound on itself in several turns, the ribbon 2 having a predefined stiffness.
  • the spiral spring 1 includes means for adjusting its stiffness.
  • the adjustment means are particularly operable when the spiral spring 1 is mounted on a plate of a clock movement, not shown in the figures.
  • the adjustment means comprise an elongated flexible element 5 extending longitudinally, which is arranged in series with the ribbon 2, the flexible element 5 connecting one end 4 of said ribbon 2 to a fixed support 11.
  • the ribbon 2 is connected to the fixed support 11 only by this flexible element 5.
  • the flexible element 5 is secured to one of the ends 4 of the ribbon 2.
  • the embodiments described below include a flexible element 5 secured to the external end 4 of the ribbon 2.
  • the internal end 19 of the ribbon 2 is intended to be assembled to a support 3 of an oscillating mass of the resonator 1.
  • the flexible element 5 adds additional stiffness to that of the ribbon 2.
  • the flexible element 5 preferably has a stiffness greater than that of the ribbon 2.
  • the flexible element 5 is here arranged in the extension of the ribbon 2.
  • the adjustment means 5 and the ribbon 2 are in one piece, or even made of the same material.
  • the end of the ribbon 2 is here curved perpendicularly to form an appendix 9.
  • the appendix 9 serves as an attachment point, and allows forces to be received. It is preferably substantially rigid, that is to say at least more rigid than the ribbon 2 and/or the elongated flexible element 5, to minimize its influence on the stiffness of the ribbon 2.
  • the longitudinal flexible element 5 is a single flexible blade 13, 15 connecting the appendix 9 to the fixed support 11, 14.
  • the single flexible blade 13 is arranged in the extension of the appendage 9.
  • the single flexible blade 13 is arranged in a direction perpendicular to the end of the ribbon 2.
  • the single flexible blade 13 is arranged in a radial direction, preferably passing through the center of the spiral spring 1, in the rest position of the spiral spring 1.
  • the spiral spring 1 further comprises prestressing means 6 for applying to the flexible element 5 at least two different forces, a first force and a second force.
  • the first force is provided either by a first traction/compression force directed substantially in the longitudinal direction F L 1 of the elongated flexible element, or by a first force directed substantially in a direction substantially orthogonal F T 1 to the longitudinal direction of the elongated flexible element, or by a first couple M 1 , preferably a bending moment, so as to vary the stiffness of the elongated flexible element as a function of the prestress level.
  • the second force is provided either by a second traction/compression force directed substantially in the longitudinal direction F L 2 of the elongated flexible element, or by a second force directed substantially in a direction substantially orthogonal F T 2 to the longitudinal direction of the elongated flexible element 5, or by a second couple M 2 , preferably a bending moment, so as to vary the stiffness of the elongated flexible element as a function of the prestress level.
  • the first force is the first longitudinal traction-compression force F L 1
  • the second force is the second orthogonal force F T 2 , which are variable.
  • the two forces preferably belong to the plane of the spiral spring 1.
  • the stiffness of the spiral spring 1 can be finely adjusted, in particular to improve the precision of the movement.
  • the prestressing means 6 allow the flexible element 5 to undergo a compressive or tensile force depending on the value of the forces. Thus, the stiffness of the flexible element 5 is varied.
  • the forces such as the longitudinal forces F L 1 , F L 2 and orthogonal forces F T 1 , F T 2 , are continuously adjustable by the prestressing means 6.
  • the forces are not restricted to discrete values.
  • the stiffness of the flexible element 5 can be adjusted with great precision.
  • the prestressing means 6 comprise a first lever 8 joined to the external end 4 of the ribbon 2.
  • the first lever 8 is curved and surrounds a part of the rolled up ribbon 2.
  • the first lever 8 has the shape of a semi-circle, or arc of a circle with an angle at the center close to 180°, attached to the appendix 9 of the end 4 of the ribbon 2.
  • the first lever 8 further comprises a first free end 12 actuable by a movement of said first free end 12, in order to apply said forces.
  • the first lever 8 is preferably flexible.
  • the first free end 12 is arranged opposite the appendix 9.
  • the first lever 8 is preferably arranged in the plane of the spiral spring 1. The first lever 8 thus makes it possible to adjust the first force.
  • the prestressing means 6 comprise a second lever 15 joined to the outer end 4 of the ribbon 2.
  • the second lever 15 is curved and surrounds a part of the rolled up ribbon 2, preferably on the other side of the ribbon 2 relative to the first lever 8.
  • the second lever 15 has the shape of a semi-circle, or an arc of a circle with a central angle close to 90°, attached to the appendix 9 of the end 4 of the ribbon 2.
  • the second lever 15 further comprises a second free end 16 actuable by a movement of said first free end 16, in order to apply said forces.
  • the second free end 16 is arranged opposite the appendix 9.
  • the second lever 16 is preferably flexible.
  • the second lever 15 is preferably arranged in the plane of the spiral spring 1. The second lever 15 thus makes it possible to adjust the second force.
  • the first 8 and the second lever 15 come together and are joined to the same appendix 9 of the curved part of the end 4 of the ribbon 2.
  • the first lever 8 allows the first force to be adjusted, while the second lever 15 allows the second force to be adjusted.
  • the two forces are adjustable independently of each other.
  • the prestressing means 6 are preferably configured to exert other forces on the elongated flexible element 5 by means of the first 8 and the second lever 15.
  • Each lever 8, 15 preferably exerts several forces, independently of one of the 'other, here three efforts simultaneously.
  • the prestressing means 6 are configured to exert a third force on the elongated flexible element.
  • the third force being provided, respectively to the first force, either by the first traction/compression force F L 1 , or by the first substantially orthogonal force F T 1 , or by the first couple M 1 .
  • the third force is the first substantially orthogonal force F T 1 .
  • the third effort is adjustable using the first lever 8.
  • the first lever 8 makes it possible to simultaneously adjust the first and third forces.
  • the prestressing means 6 are further configured to exert a fourth force on the elongated flexible element 5, the fourth force being supplied, respectively to the second force, either by the second traction/compression force F L 1 , or by the second substantially orthogonal force F T 2 , or by the second couple M 2 .
  • the fourth force is the second substantially longitudinal force F L 2 .
  • the fourth effort is adjustable using the second lever 15.
  • the prestressing means 6 are further configured to exert a fifth force on the elongated flexible element 5, the fifth force being provided, respectively at the first force and at the third force, either by the first traction/compression force F L 1 , or by the first substantially orthogonal force F T 1 , or by the first couple M 1 .
  • the fifth effort is the first couple M 1 .
  • the fifth effort is adjustable using the first lever 8.
  • the fifth effort is adjustable using the first lever 8.
  • the prestressing means 6 are also configured to exert a sixth force on the elongated flexible element 5, the sixth force being supplied, respectively to the second and to the fourth force, either by the second traction/compression force F L 2 , or by the second substantially orthogonal force F T 2 , or by the second couple M 2 .
  • the sixth effort is the second couple M 2 .
  • the sixth effort is adjustable by the second lever 15.
  • each lever 8, 15 is opposite, except for the longitudinal forces F L 1 , F L 2 which have a identical meaning.
  • the first 8 and the second lever 15 have a similar effect on the stiffness of the elongated flexible element 5. The more one raises a lever 8, 15, the more the stiffness of the elongated flexible element 5 increases.
  • Each lever makes it possible to individually modify the stiffness of the elongated flexible element 5, because it provides at least two forces.
  • the first 8 and the second lever 18 are configured to allow adjustment of the forces it applies to different intensities.
  • one lever allows adjustment within a wider adjustment range, and the other lever allows adjustment within a finer adjustment range.
  • the section of the two levers 8, 15 is for example chosen different, or else the stiffness of each lever 8, 15 is chosen different.
  • the forces or torques applied are less with a smaller section or stiffness than with a larger section or stiffness, so that the two levers 8, 15 make it possible to modify the stiffness of the elongated flexible element 5 on two different scales.
  • Such levers 8, 15 make it possible to keep a spiral spring 1 with a reduced bulk, the dimensions being restricted to be able to be inserted in a watch movement.
  • the prestressing means 6 have a shape which matches the ribbon 2, so as to keep the dimensions sufficiently small, because each part of the prestressing means 6 is close to the ribbon 2.
  • the width of the spiral spring 1 is therefore little modified by the prestressing means.
  • the spiral spring 1 is sufficiently compact to be able to be easily inserted into a movement.
  • the actuation of the first lever 8 produces on the end 4 of the ribbon 2 the longitudinal force F L 1 directed according to the longitudinal axis of the longitudinal flexible element 5, as well as an orthogonal force F T 1 directed in an orthogonal direction.
  • the actuation of the first lever 8 also produces a torque or a bending moment M 1 on the single blade 5, represented by a curved arrow.
  • Actuation of the second lever 15 produces the longitudinal force F L 2 directed in the same direction as the longitudinal force F L 1 , the orthogonal force F T 2 directed in the opposite direction of the orthogonal force F T 1 , and a torque M 2 in the opposite direction of the couple M 1 .
  • the stiffness of the single blade 13 is modified, and therefore of the assembly comprising the ribbon 2 and the single flexible blade 13.
  • the longitudinal forces F L 1 , F L 2 and orthogonal forces F T 1 , F T 2 are varied as well as the torques M 1 , M 2 by the movement of the first free end 12 of the first lever 8 and by the movement of the second free end 16 of the second lever 15.
  • the first 12 and the second free end 16 are preferably rigid to facilitate their actuation.
  • the stiffness of the flexible element 5 and therefore of the assembly comprising the flexible element 5 and the ribbon 2 is varied.
  • the invention also relates to a watch movement comprising such a spiral spring 1.
  • the spiral spring is in particular used to actuate the movement of a balance wheel.
  • the flexible blades described in the different embodiments of the spiral spring can be continuous flexible blades, as is generally the case in the figures, or else blades with rigid sections and flexible necks. connecting the sections.
  • the single flexible blade can take orientations other than radial and orthogonal to the spiral spring. Thus, it can be oriented in any direction between the radial and orthogonal directions.

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  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
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Abstract

L'invention concerne un ressort-spiral, notamment pour un mécanisme résonateur d'horlogerie, le ressort-spiral (1) comprenant un ruban (2) flexible enroulé sur lui-même selon plusieurs spires, le ruban (2) ayant une raideur prédéfinie, le ressort-spiral (1) comportant des moyens d'ajustement de sa raideur, les moyens d'ajustement comportant un élément flexible allongé (5) unique agencé en série du ruban (2), l'élément flexible allongé (5) reliant une extrémité (4) dudit ruban (2) à un support fixe (11), de manière à ajouter une raideur supplémentaire au ruban (2), l'élément flexible allongé (5) ayant de préférence une raideur supérieure à celle du ruban (2), les moyens d'ajustement comportant des moyens de précontrainte (6) pour appliquer au moins deux efforts différents sur l'élément flexible allongé (5), les moyens de précontrainte (6) comportant un premier levier (8) joint à l'extrémité (4) du ruban (2) pour pouvoir ajuster un premier effort, les moyens de précontrainte (6) comportant un deuxième levier (8) également joint à l'extrémité (4) du ruban (2) pour pouvoir ajuster un deuxième effort indépendamment du premier effort.L'invention concerne aussi un mécanisme résonateur d'horlogerie comprenant un tel ressort-spiral (1).The invention relates to a spiral spring, in particular for a watch resonator mechanism, the spiral spring (1) comprising a flexible ribbon (2) wound on itself in several turns, the ribbon (2) having a predefined stiffness , the spiral spring (1) comprising means for adjusting its stiffness, the adjustment means comprising a single elongated flexible element (5) arranged in series with the ribbon (2), the elongated flexible element (5) connecting one end (4) of said ribbon (2) to a fixed support (11), so as to add additional stiffness to the ribbon (2), the elongated flexible element (5) preferably having a stiffness greater than that of the ribbon ( 2), the adjustment means comprising prestressing means (6) for applying at least two different forces on the elongated flexible element (5), the prestressing means (6) comprising a first lever (8) joined to the end (4) of the ribbon (2) to be able to adjust a first force, the prestressing means (6) comprising a second lever (8) also attached to the end (4) of the ribbon (2) to be able to adjust a second effort independently of the first effort.The invention also relates to a clockwork resonator mechanism comprising such a spiral spring (1).

Description

Domaine technique de l'inventionTechnical field of the invention

L'invention se rapporte à un ressort-spiral pour un mécanisme résonateur d'horlogerie, le ressort-spiral étant muni de moyens de réglages de la raideur dudit ressort-spiral. L'invention se rapporte également à un mécanisme résonateur d'horlogerie muni d'un tel ressort-spiral.The invention relates to a spiral spring for a watch resonator mechanism, the spiral spring being provided with means for adjusting the stiffness of said spiral spring. The invention also relates to a watch resonator mechanism provided with such a spiral spring.

Arrière-plan technologiqueTechnology background

La plupart des montres mécaniques actuelles sont munies d'un balancier-spiral et d'un mécanisme d'échappement à ancre suisse. Le balancier-spiral constitue la base de temps de la montre. On l'appelle aussi résonateur.Most current mechanical watches are equipped with a sprung balance and a Swiss anchor escapement mechanism. The sprung balance constitutes the time base of the watch. It is also called a resonator.

L'échappement, quant à lui, remplit deux fonctions principales:

  • entretenir les va-et-vient du résonateur ;
  • compter ces va-et-vient.
The exhaust, on the other hand, performs two main functions:
  • maintain the comings and goings of the resonator;
  • count these comings and goings.

Pour constituer un résonateur mécanique, il faut un élément inertiel, un guidage et un élément de rappel élastique. Traditionnellement, un ressort spiral joue le rôle d'élément de rappel élastique pour l'élément inertiel que constitue un balancier. Ce balancier est guidé en rotation par des pivots qui tournent dans des paliers lisses en rubis.To constitute a mechanical resonator, you need an inertial element, guidance and an elastic return element. Traditionally, a spiral spring plays the role of an elastic return element for the inertial element that constitutes a balance wheel. This balance wheel is guided in rotation by pivots which rotate in ruby plain bearings.

Le ressort-spiral de balancier doit généralement pouvoir être réglé pour améliorer la précision d'une montre. A cette fin, on utilise des moyens d'ajustement de la raideur du ressort-spiral, telle une raquette pour modifier la longueur effective du ressort. Ainsi, on modifie sa raideur pour ajuster la précision de marche de la montre. Toutefois, l'efficacité d'une raquette traditionnelle pour ajuster la marche reste limitée, et elle n'est pas toujours efficace pour rendre le réglage suffisamment précis, de l'ordre de quelques secondes ou quelques dizaines de secondes par jour.The balance spring must generally be adjustable to improve the accuracy of a watch. To this end, means are used for adjusting the stiffness of the spiral spring, such as a racket to modify the effective length of the spring. Thus, we modify its stiffness to adjust the running precision of the watch. However, the effectiveness of a traditional snowshoe for adjusting gait remains limited, and it is not always effective in making the adjustment sufficiently precise, of the order of a few seconds or a few tens of seconds per day.

Pour un ajustement de la marche plus fin, il existe des moyens de réglage comprenant une ou plusieurs vis agencées dans la serge du balancier. En agissant sur les vis, on modifie l'inertie du balancier, qui a comme effet de modifier sa marche.For finer adjustment of the rate, there are adjustment means comprising one or more screws arranged in the rim of the balance wheel. By acting on the screws, we modify the inertia of the balance, which has the effect of modifying its course.

Cependant, ce mode de réglage n'est pas facile à effectuer, car il perturbe l'équilibrage du balancier, et ne permet quand même pas d'obtenir une finesse du réglage suffisante de la marche de l'oscillateur.However, this adjustment mode is not easy to carry out, because it disrupts the balancing of the balance, and still does not make it possible to obtain sufficient fineness of adjustment of the operation of the oscillator.

Résumé de l'inventionSummary of the invention

Le but de la présente invention est de pallier tout ou partie des inconvénients cités précédemment, en proposant un ressort spiral muni de moyens d'ajustement efficaces et précis, configurés en particulier pour régler la marche d'une pièce d'horlogerie en modifiant la raideur effective dudit spiral.The aim of the present invention is to overcome all or part of the drawbacks mentioned above, by proposing a spiral spring provided with effective and precise adjustment means, configured in particular to adjust the rate of a timepiece by modifying the stiffness effective of said hairspring.

A cet effet, l'invention se rapporte à un ressort-spiral, notamment pour un mécanisme résonateur d'horlogerie, le ressort-spiral comprenant un ruban flexible enroulé sur lui-même selon plusieurs spires, le ruban ayant une raideur prédéfinie, le ressort-spiral comportant des moyens d'ajustement de sa raideur, les moyens d'ajustement comportant un élément flexible allongé unique agencé en série du ruban, l'élément flexible allongé reliant une extrémité dudit ruban à un support fixe, de manière à ajouter une raideur supplémentaire au ruban, les moyens d'ajustement comportant des moyens de précontrainte pour appliquer au moins deux efforts différents sur l'élément flexible allongé.For this purpose, the invention relates to a spiral spring, in particular for a watch resonator mechanism, the spiral spring comprising a flexible ribbon wound on itself in several turns, the ribbon having a predefined stiffness, the spring -spiral comprising means for adjusting its stiffness, the adjustment means comprising a single elongated flexible element arranged in series with the ribbon, the elongated flexible element connecting one end of said ribbon to a fixed support, so as to add stiffness additional to the ribbon, the adjustment means comprising prestressing means to apply at least two different forces on the elongated flexible element.

L'invention est remarquable en ce que les moyens de précontrainte comportent un premier levier joint à l'extrémité du ruban pour pouvoir ajuster un premier effort, les moyens de précontrainte comportant un deuxième levier également joint à l'extrémité du ruban pour pouvoir ajuster un deuxième effort indépendamment du premier effort.The invention is remarkable in that the prestressing means comprise a first lever attached to the end of the ribbon to be able to adjust a first force, the prestressing means comprising a second lever also attached to the end of the ribbon to be able to adjust a second effort independently of the first effort.

Grâce à l'invention, on peut modifier la raideur de l'élément flexible allongé, telle une lame flexible. En effet, lorsqu'on applique deux efforts, on arrive à faire varier la raideur de l'élément flexible allongé. Avec un seul effort appliqué, que cela soit une force ou un couple, la raideur de l'élément flexible allongé reste la même. Avec deux forces perpendiculaires sur la lame, longitudinalement et orthogonalement, on obtient une force globale, qui fait varier la raideur de l'élément flexible allongé. Avec une force et un couple, on modifie la raideur également. La combinaison de deux efforts est primordiale pour parvenir à modifier la raideur.Thanks to the invention, it is possible to modify the stiffness of the elongated flexible element, such as a flexible blade. In fact, when we apply two forces, we manage to vary the stiffness of the elongated flexible element. With a single effort applied, whether force or torque, the stiffness of the elongated flexible member remains the same. With two perpendicular forces on the blade, longitudinally and orthogonally, we obtain an overall force, which varies the stiffness of the elongated flexible element. With a force and a torque, we also modify the stiffness. The combination of two efforts is essential to succeed in modifying the stiffness.

En agissant sur les moyens de précontrainte, on module le niveau d'intensité de la sollicitation, ce qui entraîne une modification de la raideur de l'ensemble comprenant l'élément flexible et le ruban. En effet, l'élément flexible mis en série avec le ruban apporte une raideur supplémentaire, qui se combine à celle du ruban. Ainsi, lorsque les moyens de précontrainte appliquent des efforts variables sur l'élément flexible, ils modifient la raideur de l'élément flexible et donc de l'ensemble comprenant le ruban et l'élément flexible sans modifier la raideur du ruban, quelles que soient les forces variables appliquées sur l'élément flexible allongé.By acting on the prestressing means, the intensity level of the stress is modulated, which results in a modification of the stiffness of the assembly comprising the flexible element and the ribbon. In fact, the flexible element placed in series with the ribbon provides additional stiffness, which combines with that of the ribbon. Thus, when the prestressing means apply variable forces to the flexible element, they modify the stiffness of the flexible element and therefore of the assembly comprising the ribbon and the flexible element without modifying the stiffness of the ribbon, whatever the variable forces applied to the elongated flexible element.

Autrement dit, on place un élément flexible en série du ruban entre une extrémité du ruban et le support fixe. Cet élément flexible apporte une raideur supplémentaire ajustable entre le ruban et le point d'attache du ruban, et fournit ainsi une flexibilité supplémentaire au résonateur. Ainsi, la raideur effective du résonateur comprend la raideur du ruban et la raideur de l'élément flexible. On applique alors les efforts variables pour pré-contraindre l'élément flexible, de préférence sans pré-contraindre le ruban. En pré-contraignant l'élément flexible, sa raideur change, tandis que la raideur du ruban reste sensiblement inchangée. En changeant la raideur de l'élément flexible, la raideur du résonateur (raideur du ruban et raideur de l'élément flexible change, ce qui modifie par conséquent la marche du résonateur.In other words, a flexible element in series of the ribbon is placed between one end of the ribbon and the fixed support. This flexible element provides additional adjustable stiffness between the ribbon and the ribbon attachment point, and thus provides additional flexibility to the resonator. Thus, the effective stiffness of the resonator includes the stiffness of the ribbon and the stiffness of the flexible element. Variable forces are then applied to pre-stress the flexible element, preferably without pre-stressing the ribbon. By pre-stressing the flexible element, its stiffness changes, while the stiffness of the ribbon remains substantially unchanged. By changing the stiffness of the element flexible, the stiffness of the resonator (stiffness of the ribbon and stiffness of the flexible element changes, which consequently modifies the operation of the resonator.

Par conséquent, une modification de la rigidité de l'élément flexible modifie la rigidité de l'ensemble du résonateur, et par conséquent règle sa marche de manière fine, ce qui permet d'ajuster précisément la fréquence de la base de temps. On obtient ainsi une grande précision dans le réglage de la marche, car on agit de façon très fine sur un seul élément supplémentaire pour ajuster la rigidité du ressort-spiral.Consequently, a modification of the rigidity of the flexible element modifies the rigidity of the entire resonator, and consequently finely regulates its operation, which makes it possible to precisely adjust the frequency of the time base. We thus obtain great precision in the adjustment of the rate, because we act very finely on a single additional element to adjust the rigidity of the spiral spring.

En outre, les deux leviers permettent chacun d'effectuer un réglage de précontrainte indépendamment l'un de l'autre, de sorte qu'on obtient un réglage plus précis. De plus, si les leviers sont différents l'un de l'autre, on obtient deux réglages d'intensités différentes.In addition, the two levers each allow preload adjustment to be made independently of each other, so that a more precise adjustment is obtained. In addition, if the levers are different from each other, we obtain two settings of different intensities.

Selon une forme de réalisation particulière de l'invention, le premier effort est fourni, soit par une première force de traction/compression dirigée sensiblement dans la direction longitudinale de l'élément flexible allongé, soit par une première force dirigée sensiblement dans une direction sensiblement orthogonale à la direction longitudinale de l'élément flexible allongé, soit par un premier couple, de préférence un moment de flexion, de manière à faire varier la raideur de l'élément flexible allongé en fonction du niveau de précontrainte.According to a particular embodiment of the invention, the first force is provided either by a first traction/compression force directed substantially in the longitudinal direction of the elongated flexible element, or by a first force directed substantially in a direction substantially orthogonal to the longitudinal direction of the elongated flexible element, or by a first torque, preferably a bending moment, so as to vary the stiffness of the elongated flexible element as a function of the prestress level.

Selon une forme de réalisation particulière de l'invention, le deuxième effort est fourni soit par une deuxième force de traction/compression dirigée sensiblement dans la direction longitudinale de l'élément flexible allongé, soit par une deuxième force dirigée sensiblement dans une direction sensiblement orthogonale à la direction longitudinale de l'élément flexible allongé, soit par un deuxième couple, de préférence un moment de flexion, de manière à faire varier la raideur de l'élément flexible allongé en fonction du niveau de précontrainte.According to a particular embodiment of the invention, the second force is provided either by a second traction/compression force directed substantially in the longitudinal direction of the elongated flexible element, or by a second force directed substantially in a substantially orthogonal direction to the longitudinal direction of the elongated flexible element, or by a second torque, preferably a bending moment, so as to vary the stiffness of the elongated flexible element as a function of the prestress level.

Selon une forme de réalisation particulière de l'invention, les moyens de précontrainte sont configurés pour exercer un troisième effort sur l'élément flexible allongé, le troisième effort étant fourni, respectivement au premier effort, soit par une force dirigée sensiblement dans une direction sensiblement orthogonale à la direction longitudinale de l'élément flexible allongé, soit par un couple, de préférence un moment de flexion.According to a particular embodiment of the invention, the prestressing means are configured to exert a third force on the elongated flexible element, the third force being provided, respectively to the first force, either by a force directed substantially in a direction substantially orthogonal to the longitudinal direction of the elongated flexible element, or by a torque, preferably a bending moment .

Selon une forme de réalisation particulière de l'invention, les moyens de précontrainte sont configurés pour exercer un troisième effort sur l'élément flexible allongé, le troisième effort étant fourni, respectivement au premier effort, soit par la première force de traction/compression, soit par la première force sensiblement orthogonale, soit par le premier couple. Selon une forme de réalisation particulière de l'invention, le troisième effort est ajustable par le premier levier.According to a particular embodiment of the invention, the prestressing means are configured to exert a third force on the elongated flexible element, the third force being provided, respectively to the first force, either by the first traction/compression force, either by the first substantially orthogonal force, or by the first couple. According to a particular embodiment of the invention, the third effort is adjustable by the first lever.

Selon une forme de réalisation particulière de l'invention, le troisième effort est ajustable par le premier levier.According to a particular embodiment of the invention, the third effort is adjustable by the first lever.

Selon une forme de réalisation particulière de l'invention, les moyens de précontrainte sont configurés pour exercer un quatrième effort sur l'élément flexible allongé, le quatrième effort étant fourni, respectivement au deuxième effort, soit par la deuxième force de traction/compression, soit par la deuxième force sensiblement orthogonale, soit par le deuxième couple.According to a particular embodiment of the invention, the prestressing means are configured to exert a fourth force on the elongated flexible element, the fourth force being supplied, respectively to the second force, either by the second traction/compression force, either by the second substantially orthogonal force, or by the second couple.

Selon une forme de réalisation particulière de l'invention, le quatrième effort est ajustable par le deuxième levier.According to a particular embodiment of the invention, the fourth effort is adjustable by the second lever.

Selon une forme de réalisation particulière de l'invention, les moyens de précontrainte sont configurés pour exercer un cinquième effort sur l'élément flexible allongé, le cinquième effort étant fourni, respectivement au premier effort et au troisième effort, soit par la première force de traction/compression, soit par la première force sensiblement orthogonale, soit par le premier couple.According to a particular embodiment of the invention, the prestressing means are configured to exert a fifth force on the elongated flexible element, the fifth force being supplied, respectively to the first force and to the third force, or by the first force of traction/compression, either by the first substantially orthogonal force, or by the first couple.

Selon une forme de réalisation particulière de l'invention, le cinquième effort est ajustable par le premier levier.According to a particular embodiment of the invention, the fifth effort is adjustable by the first lever.

Selon une forme de réalisation particulière de l'invention, les moyens de précontrainte sont configurés pour exercer un sixième effort sur l'élément flexible allongé, le sixième effort étant fourni, respectivement au deuxième et au quatrième effort, soit par la deuxième force de traction/compression, soit par la deuxième force sensiblement orthogonale, soit par le deuxième couple.According to a particular embodiment of the invention, the prestressing means are configured to exert a sixth force on the elongated flexible element, the sixth force being provided, respectively to the second and to the fourth force, or by the second traction force /compression, either by the second substantially orthogonal force, or by the second couple.

Selon une forme de réalisation particulière de l'invention, le sixième effort est ajustable par le deuxième levier.According to a particular embodiment of the invention, the sixth effort is adjustable by the second lever.

Selon une forme de réalisation particulière de l'invention, l'élément flexible longitudinal est une lame flexible unique.According to a particular embodiment of the invention, the longitudinal flexible element is a single flexible blade.

Selon une forme de réalisation particulière de l'invention, l'élément flexible est agencé dans un direction radiale du ressort-spiral.According to a particular embodiment of the invention, the flexible element is arranged in a radial direction of the spiral spring.

Selon une forme de réalisation particulière de l'invention, le premier et le deuxième levier sont flexibles.According to a particular embodiment of the invention, the first and the second lever are flexible.

Selon une forme de réalisation particulière de l'invention, le premier et le deuxième sont courbes et entourent au moins en partie le ruban enroulé.According to a particular embodiment of the invention, the first and the second are curved and surround at least partly the wound ribbon.

Selon une forme de réalisation particulière de l'invention, le premier et le deuxième levier comprennent une première extrémité libre actionnable par un déplacement de ladite première extrémité libre afin d'appliquer lesdits efforts sur l'élément flexible allongé.According to a particular embodiment of the invention, the first and the second lever comprise a first free end actuable by a movement of said first free end in order to apply said forces on the elongated flexible element.

Selon une forme de réalisation particulière de l'invention, le deuxième levier comprend une deuxième extrémité libre actionnable par un déplacement de ladite deuxième extrémité libre afin d'appliquer lesdits efforts sur l'élément flexible allongé.According to a particular embodiment of the invention, the second lever comprises a second free end actuable by a movement of said second free end in order to apply said forces on the elongated flexible element.

Selon une forme de réalisation particulière de l'invention, l'extrémité du ruban comprend un appendice, les moyens de précontrainte et l'élément flexible allongé étant joints à l'appendice.According to a particular embodiment of the invention, the end of the ribbon comprises an appendage, the prestressing means and the elongated flexible element being joined to the appendage.

Selon une forme de réalisation particulière de l'invention, la ou les forces longitudinales, et éventuellement le couple, sont ajustables de manière continue par les moyens de précontrainte.According to a particular embodiment of the invention, the longitudinal force(s), and possibly the torque, are continuously adjustable by the prestressing means.

Selon une forme de réalisation particulière de l'invention, l'élément flexible est agencé à une extrémité externe du ruban.According to a particular embodiment of the invention, the flexible element is arranged at an external end of the ribbon.

Selon une forme de réalisation particulière de l'invention, l'extrémité du ruban est plus rigide que l'élément flexible allongé et le ruban.According to a particular embodiment of the invention, the end of the ribbon is more rigid than the elongated flexible element and the ribbon.

Selon une forme de réalisation particulière de l'invention, l'élément flexible allongé et les leviers sont agencés à une extrémité externe du ruban.According to a particular embodiment of the invention, the elongated flexible element and the levers are arranged at an external end of the ribbon.

Selon une forme de réalisation particulière de l'invention, l'élément flexible allongé comprend un col flexible.According to a particular embodiment of the invention, the elongated flexible element comprises a flexible neck.

Selon une forme de réalisation particulière de l'invention, le premier et le deuxième levier sont configurés pour permettre un ajustement du ou des efforts à des intensités différentes.According to a particular embodiment of the invention, the first and the second lever are configured to allow adjustment of the effort(s) to different intensities.

Selon une forme de réalisation particulière de l'invention, le premier et le deuxième levier ont une raideur ou une section différente l'un de l'autre.According to a particular embodiment of the invention, the first and the second lever have a stiffness or a section different from one another.

L'invention se rapporte également à un mécanisme résonateur rotatif, notamment pour un mouvement horloger, comportant une masse oscillante et un tel ressort-spiral.The invention also relates to a rotary resonator mechanism, in particular for a watch movement, comprising an oscillating mass and such a spiral spring.

Brève description des figures : Brief description of the figures :

Les buts, avantages et caractéristiques de la présente invention apparaîtront à la lecture de plusieurs formes de réalisation données uniquement à titre d'exemples non limitatifs, en référence aux dessins annexés dans lesquels :

  • la figure 1 représente schématiquement une vue de dessus d'un ressort-spiral selon un mode de réalisation de l'invention, et
  • la figure 2 représente schématiquement une vue de dessus agrandie de l'appendice et des efforts appliquées sur l'appendice selon le premier mode de réalisation de l'invention.
The aims, advantages and characteristics of the present invention will appear on reading several embodiments given solely by way of non-limiting examples, with reference to the appended drawings in which:
  • there figure 1 schematically represents a top view of a spiral spring according to one embodiment of the invention, and
  • there figure 2 schematically represents an enlarged top view of the appendix and the forces applied to the appendix according to the first embodiment of the invention.

Description détaillée de l'inventionDetailed description of the invention

La figure 1 montre une représentation schématique d'un mode de réalisation d'un ressort-spiral 1, notamment pour un mécanisme résonateur d'horlogerie. Ici, le ressort-spiral 1 s'étend sensiblement dans un même plan. Le ressort-spiral 1 comprend un ruban flexible 2 enroulé sur lui-même selon plusieurs spires, le ruban 2 ayant une raideur prédéfinie. Le ressort-spiral 1 comporte des moyens d'ajustement de sa raideur. Par exemple, les moyens d'ajustement sont notamment actionnables lorsque le ressort-spiral 1 est monté sur une platine d'un mouvement d'horlogerie, non représenté sur les figures.There figure 1 shows a schematic representation of an embodiment of a spiral spring 1, in particular for a watch resonator mechanism. Here, the spiral spring 1 extends substantially in the same plane. The spiral spring 1 comprises a flexible ribbon 2 wound on itself in several turns, the ribbon 2 having a predefined stiffness. The spiral spring 1 includes means for adjusting its stiffness. For example, the adjustment means are particularly operable when the spiral spring 1 is mounted on a plate of a clock movement, not shown in the figures.

Selon l'invention, les moyens d'ajustement comportent un élément flexible 5 allongé s'étendant longitudinalement, qui est agencé en série du ruban 2, l'élément flexible 5 reliant une extrémité 4 dudit ruban 2 à un support fixe 11. Autrement dit, le ruban 2 est relié au support fixe 11 uniquement par cet élément flexible 5.According to the invention, the adjustment means comprise an elongated flexible element 5 extending longitudinally, which is arranged in series with the ribbon 2, the flexible element 5 connecting one end 4 of said ribbon 2 to a fixed support 11. In other words , the ribbon 2 is connected to the fixed support 11 only by this flexible element 5.

L'élément flexible 5 est solidaire d'une des extrémités 4 du ruban 2. Les modes de réalisation décrits ci-dessous comprennent un élément flexible 5 solidaire de l'extrémité externe 4 du ruban 2. L'extrémité interne 19 du ruban 2 est destinée à être assemblée à un support 3 d'une masse oscillante du résonateur 1.The flexible element 5 is secured to one of the ends 4 of the ribbon 2. The embodiments described below include a flexible element 5 secured to the external end 4 of the ribbon 2. The internal end 19 of the ribbon 2 is intended to be assembled to a support 3 of an oscillating mass of the resonator 1.

L'élément flexible 5 ajoute une raideur supplémentaire à celle du ruban 2. L'élément flexible 5 a de préférence une raideur supérieure à celle du ruban 2. L'élément flexible 5 est ici agencé dans le prolongement du ruban 2. De préférence, les moyens d'ajustement 5 et le ruban 2 sont monoblocs, voire formés d'une même matière.The flexible element 5 adds additional stiffness to that of the ribbon 2. The flexible element 5 preferably has a stiffness greater than that of the ribbon 2. The flexible element 5 is here arranged in the extension of the ribbon 2. Preferably, the adjustment means 5 and the ribbon 2 are in one piece, or even made of the same material.

En outre, l'extrémité du ruban 2 est ici recourbée perpendiculairement pour former un appendice 9. L'appendice 9 sert de point d'attache, et permet de recevoir des efforts. Il est de préférence sensiblement rigide, c'est-à-dire au moins plus rigide que le ruban 2 et/ou l'élément flexible allongé 5, pour minimiser son influence sur la raideur du ruban 2.In addition, the end of the ribbon 2 is here curved perpendicularly to form an appendix 9. The appendix 9 serves as an attachment point, and allows forces to be received. It is preferably substantially rigid, that is to say at least more rigid than the ribbon 2 and/or the elongated flexible element 5, to minimize its influence on the stiffness of the ribbon 2.

De préférence, l'élément flexible 5 longitudinal est une lame flexible 13, 15 unique reliant l'appendice 9 au support fixe 11, 14.Preferably, the longitudinal flexible element 5 is a single flexible blade 13, 15 connecting the appendix 9 to the fixed support 11, 14.

La lame flexible 13 unique est agencée dans le prolongement de l'appendice 9. La lame flexible 13 unique est disposée dans une direction perpendiculaire à l'extrémité du ruban 2.The single flexible blade 13 is arranged in the extension of the appendage 9. The single flexible blade 13 is arranged in a direction perpendicular to the end of the ribbon 2.

Ainsi, la lame flexible 13 unique est agencée selon une direction radiale, de préférence passant par le centre du ressort spiral 1, en position de repos du ressort-spiral 1.Thus, the single flexible blade 13 is arranged in a radial direction, preferably passing through the center of the spiral spring 1, in the rest position of the spiral spring 1.

Le ressort-spiral 1 comporte en outre des moyens de précontrainte 6 pour appliquer sur l'élément flexible 5 au moins deux efforts différents, un premier effort et un deuxième effort.The spiral spring 1 further comprises prestressing means 6 for applying to the flexible element 5 at least two different forces, a first force and a second force.

Le premier effort est fourni, soit par une première force de traction/compression dirigée sensiblement dans la direction longitudinale F L1 de l'élément flexible allongé, soit par une première force dirigée sensiblement dans une direction sensiblement orthogonale F T1 à la direction longitudinale de l'élément flexible allongé, soit par un premier couple M 1, de préférence un moment de flexion, de manière à faire varier la raideur de l'élément flexible allongé en fonction du niveau de précontrainte.The first force is provided either by a first traction/compression force directed substantially in the longitudinal direction F L 1 of the elongated flexible element, or by a first force directed substantially in a direction substantially orthogonal F T 1 to the longitudinal direction of the elongated flexible element, or by a first couple M 1 , preferably a bending moment, so as to vary the stiffness of the elongated flexible element as a function of the prestress level.

Le deuxième effort est fourni soit par une deuxième force de traction/compression dirigée sensiblement dans la direction longitudinale F L2 de l'élément flexible allongé, soit par une deuxième force dirigée sensiblement dans une direction sensiblement orthogonale F T2 à la direction longitudinale de l'élément flexible allongé 5, soit par un deuxième couple M 2, de préférence un moment de flexion, de manière à faire varier la raideur de l'élément flexible allongé en fonction du niveau de précontrainte.The second force is provided either by a second traction/compression force directed substantially in the longitudinal direction F L 2 of the elongated flexible element, or by a second force directed substantially in a direction substantially orthogonal F T 2 to the longitudinal direction of the elongated flexible element 5, or by a second couple M 2 , preferably a bending moment, so as to vary the stiffness of the elongated flexible element as a function of the prestress level.

Dans ce mode de réalisation, le premier fort est la première force longitudinale F L1 de traction-compression, et le deuxième effort est la deuxième force orthogonale F T2, qui sont variables. Les deux forces appartiennent de préférence au plan du ressort-spiral 1. Ainsi, on peut ajuster finement la raideur du ressort spiral 1, notamment pour améliorer la précision de la marche du mouvement.In this embodiment, the first force is the first longitudinal traction-compression force F L 1 , and the second force is the second orthogonal force F T 2 , which are variable. The two forces preferably belong to the plane of the spiral spring 1. Thus, the stiffness of the spiral spring 1 can be finely adjusted, in particular to improve the precision of the movement.

Les moyens de précontrainte 6 permettent à l'élément flexible 5 de subir un effort de compression ou de traction selon la valeur des forces. Ainsi, on fait varier la raideur de l'élément flexible 5.The prestressing means 6 allow the flexible element 5 to undergo a compressive or tensile force depending on the value of the forces. Thus, the stiffness of the flexible element 5 is varied.

On agit seulement sur l'élément flexible 5 pour modifier sa raideur sans agir directement sur le ruban 2. On obtient ainsi encore davantage de précision car un seul élément sert à l'ajustement de la rigidité. Pendant les oscillations, l'extrémité 4 du ruban 2 peut être mobile.We only act on the flexible element 5 to modify its stiffness without acting directly on the ribbon 2. We thus obtain even more precision because a single element is used to adjust the rigidity. During the oscillations, the end 4 of the ribbon 2 can be mobile.

De plus, les efforts, tels les forces longitudinale F L1, F L2 et orthogonale F T1 , F T2 , sont ajustables de manière continue par les moyens de précontrainte 6. Autrement dit, les forces ne sont pas restreintes à des valeurs discrètes. Ainsi, on peut ajuster la raideur de l'élément flexible 5 avec une grande précision.In addition, the forces, such as the longitudinal forces F L 1 , F L 2 and orthogonal forces F T 1 , F T 2 , are continuously adjustable by the prestressing means 6. In other words, the forces are not restricted to discrete values. Thus, the stiffness of the flexible element 5 can be adjusted with great precision.

Les moyens de précontrainte 6 comportent un premier levier 8 joint à l'extrémité externe 4 du ruban 2. Le premier levier 8 est courbe et entoure une partie du ruban 2 enroulé. Le premier levier 8 a une forme de demi-cercle, ou d'arc de cercle d'angle au centre voisin de 180°, joint à l'appendice 9 de l'extrémité 4 du ruban 2.The prestressing means 6 comprise a first lever 8 joined to the external end 4 of the ribbon 2. The first lever 8 is curved and surrounds a part of the rolled up ribbon 2. The first lever 8 has the shape of a semi-circle, or arc of a circle with an angle at the center close to 180°, attached to the appendix 9 of the end 4 of the ribbon 2.

Le premier levier 8 comprend en outre une première extrémité libre 12 actionnable par un déplacement de ladite première extrémité libre 12, afin d'appliquer lesdits efforts. Le premier levier 8 est de préférence flexible. La première extrémité libre 12 est agencée à l'opposé de l'appendice 9. Le premier levier 8 est de préférence agencé dans le plan du ressort-spiral 1. Le premier levier 8 permet ainsi d'ajuster le premier effort.The first lever 8 further comprises a first free end 12 actuable by a movement of said first free end 12, in order to apply said forces. The first lever 8 is preferably flexible. The first free end 12 is arranged opposite the appendix 9. The first lever 8 is preferably arranged in the plane of the spiral spring 1. The first lever 8 thus makes it possible to adjust the first force.

Les moyens de précontrainte 6 comportent un deuxième levier 15 joint à l'extrémité externe 4 du ruban 2. Le deuxième levier 15 est courbe et entoure une partie du ruban 2 enroulé, de préférence de l'autre côté du ruban 2 par rapport au premier levier 8. Le deuxième levier 15 a une forme de demi-cercle, ou d'arc de cercle d'angle au centre voisin de 90°, joint à l'appendice 9 de l'extrémité 4 du ruban 2.The prestressing means 6 comprise a second lever 15 joined to the outer end 4 of the ribbon 2. The second lever 15 is curved and surrounds a part of the rolled up ribbon 2, preferably on the other side of the ribbon 2 relative to the first lever 8. The second lever 15 has the shape of a semi-circle, or an arc of a circle with a central angle close to 90°, attached to the appendix 9 of the end 4 of the ribbon 2.

Le deuxième levier 15 comprend en outre une deuxième extrémité libre 16 actionnable par un déplacement de ladite première extrémité libre 16, afin d'appliquer lesdits efforts. La deuxième extrémité libre 16 est agencée à l'opposé de l'appendice 9.The second lever 15 further comprises a second free end 16 actuable by a movement of said first free end 16, in order to apply said forces. The second free end 16 is arranged opposite the appendix 9.

Le deuxième levier 16 est de préférence flexible. Le deuxième levier 15 est de préférence agencé dans le plan du ressort-spiral 1. Le deuxième levier 15 permet ainsi d'ajuster le deuxième effort. Ainsi, le premier 8 et le deuxième levier 15 se rejoignent et sont joints au même appendice 9 de la partie recourbée de l'extrémité 4 du ruban 2.The second lever 16 is preferably flexible. The second lever 15 is preferably arranged in the plane of the spiral spring 1. The second lever 15 thus makes it possible to adjust the second force. Thus, the first 8 and the second lever 15 come together and are joined to the same appendix 9 of the curved part of the end 4 of the ribbon 2.

Le premier levier 8 permet d'ajuster le premier effort, tandis que le deuxième levier 15 permet d'ajuster le deuxième effort. Ainsi, les deux efforts sont ajustables indépendamment l'un de l'autre.The first lever 8 allows the first force to be adjusted, while the second lever 15 allows the second force to be adjusted. Thus, the two forces are adjustable independently of each other.

Les moyens de précontrainte 6 sont de préférence configurés pour exercer d'autres efforts sur l'élément flexible allongé 5 au moyen du premier 8 et du deuxième levier 15. Chaque levier 8, 15 exerce de préférence plusieurs efforts, indépendamment l'un de l'autre, ici trois efforts simultanément.The prestressing means 6 are preferably configured to exert other forces on the elongated flexible element 5 by means of the first 8 and the second lever 15. Each lever 8, 15 preferably exerts several forces, independently of one of the 'other, here three efforts simultaneously.

Les moyens de précontrainte 6 sont configurés pour exercer un troisième effort sur l'élément flexible allongé. Le troisième effort étant fourni, respectivement au premier effort, soit par la première force de traction/compression F L1, soit par la première force sensiblement orthogonale F T1, soit par le premier couple M 1. Dans ce mode réalisation, le troisième effort est la première force sensiblement orthogonale F T1 . Le troisième effort est ajustable grâce au premier levier 8.The prestressing means 6 are configured to exert a third force on the elongated flexible element. The third force being provided, respectively to the first force, either by the first traction/compression force F L 1 , or by the first substantially orthogonal force F T 1 , or by the first couple M 1 . In this embodiment, the third force is the first substantially orthogonal force F T 1 . The third effort is adjustable using the first lever 8.

Ainsi, le premier levier 8 permet d'ajuster simultanément le premier et le troisième effort.Thus, the first lever 8 makes it possible to simultaneously adjust the first and third forces.

Les moyens de précontrainte 6 sont en outre configurés pour exercer un quatrième effort sur l'élément flexible allongé 5, le quatrième effort étant fourni, respectivement au deuxième effort, soit par la deuxième force de traction/compression F L1, soit par la deuxième force sensiblement orthogonale F T2, soit par le deuxième couple M 2. Dans ce mode réalisation, le quatrième effort est la deuxième force sensiblement longitudinale F L2. Le quatrième effort est ajustable grâce au deuxième levier 15.The prestressing means 6 are further configured to exert a fourth force on the elongated flexible element 5, the fourth force being supplied, respectively to the second force, either by the second traction/compression force F L 1 , or by the second substantially orthogonal force F T 2 , or by the second couple M 2 . In this embodiment, the fourth force is the second substantially longitudinal force F L 2 . The fourth effort is adjustable using the second lever 15.

Les moyens de précontrainte 6 sont encore configurés pour exercer un cinquième effort sur l'élément flexible allongé 5, le cinquième effort étant fourni, respectivement au premier effort et au troisième effort, soit par la première force de traction/compression F L1, soit par la première force sensiblement orthogonale F T1, soit par le premier couple M 1.The prestressing means 6 are further configured to exert a fifth force on the elongated flexible element 5, the fifth force being provided, respectively at the first force and at the third force, either by the first traction/compression force F L 1 , or by the first substantially orthogonal force F T 1 , or by the first couple M 1 .

Dans ce mode réalisation, le cinquième effort est le premier couple M 1. Le cinquième effort est ajustable grâce au premier levier 8. Le cinquième effort est ajustable par le premier levier 8.In this embodiment, the fifth effort is the first couple M 1 . The fifth effort is adjustable using the first lever 8. The fifth effort is adjustable using the first lever 8.

Les moyens de précontrainte 6 sont également configurés pour exercer un sixième effort sur l'élément flexible allongé 5, le sixième effort étant fourni, respectivement au deuxième et au quatrième effort, soit par la deuxième force de traction/compression F L2, soit par la deuxième force sensiblement orthogonale F T2, soit par le deuxième couple M 2. Dans ce mode réalisation, le sixième effort est le deuxième couple M 2. Le sixième effort est ajustable par le deuxième levier 15.The prestressing means 6 are also configured to exert a sixth force on the elongated flexible element 5, the sixth force being supplied, respectively to the second and to the fourth force, either by the second traction/compression force F L 2 , or by the second substantially orthogonal force F T 2 , or by the second couple M 2 . In this embodiment, the sixth effort is the second couple M 2 . The sixth effort is adjustable by the second lever 15.

Dans ce mode de réalisation, les efforts produits par chaque levier 8, 15 sont opposées, sauf pour les forces longitudinales F L1, F L2 qui ont un sens identique. Cependant, le premier 8 et le deuxième levier 15 ont un effet semblable sur la raideur de l'élément flexible allongé 5. Plus on remonte un levier 8, 15, plus la raideur de l'élément flexible allongé 5 augmente.In this embodiment, the forces produced by each lever 8, 15 are opposite, except for the longitudinal forces F L 1 , F L 2 which have a identical meaning. However, the first 8 and the second lever 15 have a similar effect on the stiffness of the elongated flexible element 5. The more one raises a lever 8, 15, the more the stiffness of the elongated flexible element 5 increases.

Chaque levier permet de modifier individuellement la raideur de l'élément flexible allongé 5, car il fournit au moins deux efforts.Each lever makes it possible to individually modify the stiffness of the elongated flexible element 5, because it provides at least two forces.

De préférence, le premier 8 et le deuxième levier 18 sont configurés pour permettre un ajustement des efforts qu'il applique à des intensités différentes. Ainsi, un levier permet un ajustement dans une plage de réglage plus large, et l'autre levier permet un ajustement dans une plage de réglage plus fine.Preferably, the first 8 and the second lever 18 are configured to allow adjustment of the forces it applies to different intensities. Thus, one lever allows adjustment within a wider adjustment range, and the other lever allows adjustment within a finer adjustment range.

Pour obtenir une différence d'intensité de réglage de la raideur de l'élément flexible allongé 5 entre les deux leviers 8, 15, la section des deux leviers 8, 15 est par exemple choisie différente, ou bien la raideur de chaque levier 8, 15 est choisie différente.To obtain a difference in intensity of adjustment of the stiffness of the elongated flexible element 5 between the two levers 8, 15, the section of the two levers 8, 15 is for example chosen different, or else the stiffness of each lever 8, 15 is chosen different.

Ainsi, les forces ou couples appliqués sont moindres avec une section ou raideur plus petite, qu'avec une section ou une raideur plus grande, de sorte que les deux leviers 8, 15 permettent de modifier la raideur de l'élément flexible allongé 5 sur deux échelles différentes.Thus, the forces or torques applied are less with a smaller section or stiffness than with a larger section or stiffness, so that the two levers 8, 15 make it possible to modify the stiffness of the elongated flexible element 5 on two different scales.

De tels leviers 8, 15 permettent de garder un ressort-spiral 1 avec un encombrement réduit, les dimensions étant restreintes pour pouvoir être inséré dans un mouvement d'horlogerie.Such levers 8, 15 make it possible to keep a spiral spring 1 with a reduced bulk, the dimensions being restricted to be able to be inserted in a watch movement.

En effet, les moyens de précontrainte 6 ont une forme qui s'accorde avec le ruban 2, de manière à garder des dimensions suffisamment petites, car chaque partie des moyens de précontrainte 6 est proche du ruban 2. La largeur du ressort-spiral 1 est donc peu modifiée par les moyens de précontrainte. Ainsi, le ressort-spiral 1 est suffisamment compact pour pouvoir être inséré facilement dans un mouvement.In fact, the prestressing means 6 have a shape which matches the ribbon 2, so as to keep the dimensions sufficiently small, because each part of the prestressing means 6 is close to the ribbon 2. The width of the spiral spring 1 is therefore little modified by the prestressing means. Thus, the spiral spring 1 is sufficiently compact to be able to be easily inserted into a movement.

Comme le montre la figure 2, l'actionnement du premier levier 8 produit sur l'extrémité 4 du ruban 2 la force longitudinale F L1 dirigée selon l'axe longitudinal de l'élément flexible 5 longitudinal, ainsi qu'une force orthogonale F T1 dirigée selon une direction orthogonale. L'actionnement du premier levier 8 produit en outre un couple ou un moment de flexion M 1 sur la lame unique 5, représentée par une flèche courbée.As shown in the figure 2 , the actuation of the first lever 8 produces on the end 4 of the ribbon 2 the longitudinal force F L 1 directed according to the longitudinal axis of the longitudinal flexible element 5, as well as an orthogonal force F T 1 directed in an orthogonal direction. The actuation of the first lever 8 also produces a torque or a bending moment M 1 on the single blade 5, represented by a curved arrow.

L'actionnement du deuxième levier 15 produit la force longitudinale F L2 dirigée dans le même sens que la force longitudinale F L1, la force orthogonale F T2 dirigée dans le sens opposé de la force orthogonale F T1 , et un couple M 2 dans le sens inverse du couple M 1.Actuation of the second lever 15 produces the longitudinal force F L 2 directed in the same direction as the longitudinal force F L 1 , the orthogonal force F T 2 directed in the opposite direction of the orthogonal force F T 1 , and a torque M 2 in the opposite direction of the couple M 1 .

Ainsi, on modifie la raideur de la lame unique 13, et donc de l'ensemble comprenant le ruban 2 et la lame flexible unique 13.Thus, the stiffness of the single blade 13 is modified, and therefore of the assembly comprising the ribbon 2 and the single flexible blade 13.

On fait varier les forces longitudinale F L1, F L2 et orthogonales F T1, F T2 ainsi que les couples M 1, M 2 par le déplacement de la première extrémité libre 12 du premier levier 8 et par le déplacement de la deuxième extrémité libre 16 du deuxième levier 15. La première 12 et la deuxième extrémité libre 16 sont de préférence rigides pour faciliter leur actionnement. Ainsi, on fait varier la raideur de l'élément flexible 5 et donc de l'ensemble comprenant l'élément flexible 5 et le ruban 2.The longitudinal forces F L 1 , F L 2 and orthogonal forces F T 1 , F T 2 are varied as well as the torques M 1 , M 2 by the movement of the first free end 12 of the first lever 8 and by the movement of the second free end 16 of the second lever 15. The first 12 and the second free end 16 are preferably rigid to facilitate their actuation. Thus, the stiffness of the flexible element 5 and therefore of the assembly comprising the flexible element 5 and the ribbon 2 is varied.

L'invention se rapporte également à un mouvement d'horlogerie comprenant un tel ressort-spiral 1. Le ressort spiral est notamment utilisé pour actionner le mouvement d'un balancier.The invention also relates to a watch movement comprising such a spiral spring 1. The spiral spring is in particular used to actuate the movement of a balance wheel.

Naturellement, l'invention n'est pas limitée aux modes de réalisation décrits en référence aux figures et des variantes pourraient être envisagées sans sortir du cadre de l'invention.Naturally, the invention is not limited to the embodiments described with reference to the figures and variants could be considered without departing from the scope of the invention.

Concernant l'élément longitudinal, les lames flexibles décrites dans les différents modes de réalisation du ressort-spiral, peuvent être des lames flexibles continues, comme cela est généralement le cas dans les figures, ou bien des lames avec des tronçons rigides et des cols flexibles reliant les tronçons.Concerning the longitudinal element, the flexible blades described in the different embodiments of the spiral spring can be continuous flexible blades, as is generally the case in the figures, or else blades with rigid sections and flexible necks. connecting the sections.

En outre, la lame flexible unique peut prendre des orientations autres que radiale et orthogonale par rapport au ressort-spiral. Ainsi, elle peut être orientée selon n'importe qu'elle direction comprise entre les directions radiale et orthogonale.In addition, the single flexible blade can take orientations other than radial and orthogonal to the spiral spring. Thus, it can be oriented in any direction between the radial and orthogonal directions.

Claims (20)

Ressort-spiral, notamment pour mécanisme résonateur d'horlogerie, le ressort-spiral (1) comprenant un ruban (2) flexible enroulé sur lui-même selon plusieurs spires, le ruban (2) ayant une raideur prédéfinie, le ressort-spiral (1) comportant des moyens d'ajustement de sa raideur, les moyens d'ajustement comportant un élément flexible allongé (5) unique agencé en série du ruban (2), l'élément flexible allongé (5) reliant une extrémité (4, 19) dudit ruban (2) à un support fixe (11), de manière à ajouter une raideur supplémentaire au ruban (2), l'élément flexible allongé (5) ayant de préférence une raideur supérieure à celle du ruban (2), les moyens d'ajustement comportant des moyens de précontrainte (6) pour appliquer au moins deux efforts différents sur l'élément flexible allongé (5), caractérisé en ce que les moyens de précontrainte (6) comportent un premier levier (8) joint à l'extrémité (4, 19) du ruban (2) pour pouvoir ajuster un premier effort, les moyens de précontrainte (6) comportant un deuxième levier (8) également joint à l'extrémité (4, 19) du ruban (2) pour pouvoir ajuster un deuxième effort indépendamment du premier effort.Spiral spring, in particular for a watch resonator mechanism, the spiral spring (1) comprising a flexible ribbon (2) wound on itself in several turns, the ribbon (2) having a predefined stiffness, the spiral spring ( 1) comprising means for adjusting its stiffness, the adjustment means comprising a single elongated flexible element (5) arranged in series with the ribbon (2), the elongated flexible element (5) connecting one end (4, 19 ) of said ribbon (2) to a fixed support (11), so as to add additional stiffness to the ribbon (2), the elongated flexible element (5) preferably having a stiffness greater than that of the ribbon (2), the adjustment means comprising prestressing means (6) for applying at least two different forces on the elongated flexible element (5), characterized in that the prestressing means (6) comprise a first lever (8) joined to the end (4, 19) of the ribbon (2) to be able to adjust a first force, the prestressing means (6) comprising a second lever (8) also attached to the end (4, 19) of the ribbon (2) to be able to adjust a second effort independently of the first effort. Ressort-spiral selon la revendication 1, caractérisé en ce que le premier effort est fourni, soit par une première force de traction/compression dirigée sensiblement dans la direction longitudinale F L1 de l'élément flexible allongé (5), soit par une première force dirigée sensiblement dans une direction sensiblement orthogonale F T1 à la direction longitudinale de l'élément flexible allongé (5), soit par un premier couple M 1, de préférence un moment de flexion, de manière à faire varier la raideur de l'élément flexible allongé (5) en fonction du niveau de précontrainte.Spiral spring according to claim 1, characterized in that the first force is provided either by a first traction/compression force directed substantially in the longitudinal direction F L 1 of the elongated flexible element (5), or by a first force directed substantially in a direction substantially orthogonal F T 1 to the longitudinal direction of the elongated flexible element (5), or by a first couple M 1 , preferably a bending moment, so as to vary the stiffness of the elongated flexible element (5) depending on the preload level. Ressort-spiral selon la revendication 1 ou 2, caractérisé en ce que le deuxième effort est fourni soit par une deuxième force de traction/compression dirigée sensiblement dans la direction longitudinale F L2 de l'élément flexible allongé (5), soit par une deuxième force dirigée sensiblement dans une direction sensiblement orthogonale F T2 à la direction longitudinale de l'élément flexible allongé (5), soit par un deuxième couple M 2, de préférence un moment de flexion, de manière à faire varier la raideur de l'élément flexible allongé (5) en fonction du niveau de précontrainte.Spiral spring according to claim 1 or 2, characterized in that the second force is provided either by a second traction/compression force directed substantially in the direction longitudinal direction F L 2 of the elongated flexible element (5), either by a second force directed substantially in a direction substantially orthogonal F T 2 to the longitudinal direction of the elongated flexible element (5), or by a second couple M 2 , preferably a bending moment, so as to vary the stiffness of the elongated flexible element (5) as a function of the prestress level. Ressort-spiral selon l'une, quelconque, des revendications précédentes, caractérisé en ce que les moyens de précontrainte (6) sont configurés pour exercer un troisième effort sur l'élément flexible allongé (5), le troisième effort étant fourni, respectivement au premier effort, soit par la première force de traction/compression F L1, soit par la première force sensiblement orthogonale F T1 , soit par le premier couple M 1.Spiral spring according to any one of the preceding claims, characterized in that the prestressing means (6) are configured to exert a third force on the elongated flexible element (5), the third force being supplied, respectively to the first effort, either by the first traction/compression force F L 1 , or by the first substantially orthogonal force F T 1 , or by the first couple M 1 . Ressort-spiral selon la revendication 4, caractérisé en ce que le troisième effort est ajustable par le premier levier (8).Spiral spring according to claim 4, characterized in that the third force is adjustable by the first lever (8). Ressort-spiral selon l'une, quelconque, des revendications précédentes, caractérisé en ce que les moyens de précontrainte (6) sont configurés pour exercer un quatrième effort sur l'élément flexible allongé (5), le quatrième effort étant fourni, respectivement au deuxième effort, soit par la deuxième force de traction/compression F L2, soit par la deuxième force sensiblement orthogonale F T2, soit par le deuxième couple M 2.Spiral spring according to any one of the preceding claims, characterized in that the prestressing means (6) are configured to exert a fourth force on the elongated flexible element (5), the fourth force being supplied, respectively to the second effort, either by the second traction/compression force F L 2 , or by the second substantially orthogonal force F T 2 , or by the second couple M 2 . Ressort-spiral selon la revendication 6, caractérisé en ce que le quatrième effort est ajustable par le deuxième levier (15).Spiral spring according to claim 6, characterized in that the fourth force is adjustable by the second lever (15). Ressort-spiral selon l'une, quelconque, des revendications précédentes, caractérisé en ce que les moyens de précontrainte (6) sont configurés pour exercer un cinquième effort sur l'élément flexible allongé (5), le cinquième effort étant fourni, respectivement au premier effort et au troisième effort, soit par la première force de traction/compression F L1, soit par la première force sensiblement orthogonale F T1, soit par le premier couple M 1.Spiral spring according to any one of the preceding claims, characterized in that the prestressing means (6) are configured to exert a fifth force on the elongated flexible element (5), the fifth force being supplied, respectively to the first effort and at the third effort, or by the first force of traction/compression F L 1 , either by the first substantially orthogonal force F T 1 , or by the first couple M 1 . Ressort-spiral selon la revendication 8, caractérisé en ce que le cinquième effort est ajustable par le premier levier (8).Spiral spring according to claim 8, characterized in that the fifth force is adjustable by the first lever (8). Ressort-spiral selon l'une, quelconque, des revendications précédentes, caractérisé en ce que les moyens de précontrainte (6) sont configurés pour exercer un sixième effort sur l'élément flexible allongé (5), le sixième effort étant fourni, respectivement au deuxième et au quatrième effort, soit par la deuxième force de traction/compression F L2, soit par la deuxième force sensiblement orthogonale F T2, soit par le deuxième couple M 2.Spiral spring according to any one of the preceding claims, characterized in that the prestressing means (6) are configured to exert a sixth force on the elongated flexible element (5), the sixth force being supplied, respectively to the second and fourth effort, either by the second traction/compression force F L 2 , or by the second substantially orthogonal force F T 2 , or by the second couple M 2 . Ressort-spiral selon la revendication 10, caractérisé en ce que le sixième effort est ajustable par le deuxième levier (15).Spiral spring according to claim 10, characterized in that the sixth force is adjustable by the second lever (15). Ressort-spiral selon l'une, quelconque, des revendications précédentes, caractérisé en ce que l'élément flexible (5) allongé est une lame flexible unique (13).Spiral spring according to any one of the preceding claims, characterized in that the elongated flexible element (5) is a single flexible blade (13). Ressort-spiral selon l'une, quelconque, des revendications précédentes, caractérisé en ce que l'élément flexible (5) est agencé dans un direction radiale du ressort-spiral (1).Spiral spring according to any one of the preceding claims, characterized in that the flexible element (5) is arranged in a radial direction of the spiral spring (1). Ressort-spiral selon l'une, quelconque, des revendications précédentes, caractérisé en ce que le premier (8) et le deuxième levier (15) sont flexibles.Spiral spring according to any one of the preceding claims, characterized in that the first (8) and the second lever (15) are flexible. Ressort-spiral selon l'une, quelconque, des revendications précédentes, caractérisé en ce que le premier levier (8) comprend une première extrémité libre (12) actionnable par un déplacement de ladite première extrémité libre (12) afin d'appliquer lesdits efforts sur l'élément flexible allongé (5), et le deuxième levier (15) comprend une deuxième extrémité libre (16) actionnable par un déplacement de ladite deuxième extrémité libre (16) afin d'appliquer lesdits efforts sur l'élément flexible allongé (5).Spiral spring according to any one of the preceding claims, characterized in that the first lever (8) comprises a first free end (12) actuable by a movement of said first free end (12) in order to apply said forces on the elongated flexible element (5), and the second lever (15) comprises a second free end (16) actuable by a movement of said second free end (16) in order to apply said forces to the elongated flexible element (5). Ressort-spiral selon l'une, quelconque, des revendications précédentes, caractérisé en ce que le premier (8) et le deuxième levier (15) sont configurés pour permettre un ajustement du ou des efforts à des intensités différentes.Spiral spring according to any one of the preceding claims, characterized in that the first (8) and the second lever (15) are configured to allow adjustment of the force(s) to different intensities. Ressort-spiral selon la revendication 16, caractérisé en ce que le premier (8) et le deuxième levier (15) ont une section ou une raideur différente l'un de l'autre.Spiral spring according to claim 16, characterized in that the first (8) and the second lever (15) have a section or a stiffness different from each other. Ressort-spiral selon l'une, quelconque, des revendications précédentes, caractérisé en ce que le ou les efforts sont ajustables de manière continue par les moyens de précontrainte (6).Spiral spring according to any one of the preceding claims, characterized in that the force(s) are continuously adjustable by the prestressing means (6). Ressort-spiral selon l'une, quelconque, des revendications précédentes, caractérisé en ce que l'élément flexible (5) et les leviers (8, 15) sont agencés à une extrémité externe (4) du ruban (2).Spiral spring according to any one of the preceding claims, characterized in that the flexible element (5) and the levers (8, 15) are arranged at an external end (4) of the ribbon (2). Mécanisme résonateur rotatif, notamment pour un mouvement horloger, comportant une masse oscillante, caractérisé en ce qu'il comprend un ressort-spiral (1) selon l'une, quelconque, des revendications précédentes.Rotary resonator mechanism, in particular for a watch movement, comprising an oscillating mass, characterized in that it comprises a spiral spring (1) according to any one of the preceding claims.
EP22202267.5A 2022-10-18 2022-10-18 Hairspring for timepiece resonator mechanism provided with means for adjusting the stiffness Pending EP4357857A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP22202267.5A EP4357857A1 (en) 2022-10-18 2022-10-18 Hairspring for timepiece resonator mechanism provided with means for adjusting the stiffness
US18/474,448 US20240126209A1 (en) 2022-10-18 2023-09-26 Spiral spring for a horological resonator mechanism provided with means for adjusting the stiffness
JP2023172639A JP2024059581A (en) 2022-10-18 2023-10-04 Spiral spring for horological resonator mechanism provided with means for adjusting stiffness
CN202311358329.0A CN117908351A (en) 2022-10-18 2023-10-18 Spiral hairspring for a timepiece resonator mechanism provided with means for adjusting the stiffness

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EP (1) EP4357857A1 (en)
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2138912B1 (en) * 2008-06-24 2012-07-04 Michel Belot Horological hairspring with concentric development
CH703273B1 (en) * 2010-06-10 2015-02-27 Montres Breguet Sa Breguet terminal double curve.
EP4009115A1 (en) * 2020-12-02 2022-06-08 Omega SA Hairspring for timepiece resonator mechanism provided with a means for adjusting rigidity

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2138912B1 (en) * 2008-06-24 2012-07-04 Michel Belot Horological hairspring with concentric development
CH703273B1 (en) * 2010-06-10 2015-02-27 Montres Breguet Sa Breguet terminal double curve.
EP4009115A1 (en) * 2020-12-02 2022-06-08 Omega SA Hairspring for timepiece resonator mechanism provided with a means for adjusting rigidity

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