EP3502788A1 - Standalone device for adjusting the active length of a hairspring - Google Patents

Standalone device for adjusting the active length of a hairspring Download PDF

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Publication number
EP3502788A1
EP3502788A1 EP17208988.0A EP17208988A EP3502788A1 EP 3502788 A1 EP3502788 A1 EP 3502788A1 EP 17208988 A EP17208988 A EP 17208988A EP 3502788 A1 EP3502788 A1 EP 3502788A1
Authority
EP
European Patent Office
Prior art keywords
racket
active length
hairspring
arm
pivoting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP17208988.0A
Other languages
German (de)
French (fr)
Other versions
EP3502788B1 (en
Inventor
Paulo Bravo
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.)
Swatch Group Research and Development SA
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Swatch Group Research and Development SA
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Filing date
Publication date
Application filed by Swatch Group Research and Development SA filed Critical Swatch Group Research and Development SA
Priority to CH01574/17A priority Critical patent/CH714480A2/en
Priority to EP17208988.0A priority patent/EP3502788B1/en
Priority to JP2018221969A priority patent/JP6688371B2/en
Priority to CN201811492233.2A priority patent/CN109991826B/en
Priority to US16/221,664 priority patent/US11397410B2/en
Publication of EP3502788A1 publication Critical patent/EP3502788A1/en
Application granted granted Critical
Publication of EP3502788B1 publication Critical patent/EP3502788B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • 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
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/20—Compensation of mechanisms for stabilising frequency
    • G04B17/28—Compensation of mechanisms for stabilising frequency for the effect of imbalance of the weights, e.g. tourbillon
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/04—Oscillators acting by spring tension
    • G04B17/06—Oscillators with hairsprings, e.g. balance
    • G04B17/063—Balance construction
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/20—Compensation of mechanisms for stabilising frequency
    • G04B17/26—Compensation of mechanisms for stabilising frequency for the effect of variations of the impulses
    • 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
    • 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
    • G04B18/028—Setting the regulator by means coupled to or depending on another device, e.g. by the time indication setting mechanism
    • 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
    • G04B18/04—Adjusting the beat of the pendulum, balance, or the like, e.g. putting into beat
    • 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
    • G04B18/04—Adjusting the beat of the pendulum, balance, or the like, e.g. putting into beat
    • G04B18/06—Adjusting the beat of the pendulum, balance, or the like, e.g. putting into beat by setting the collet or the stud of a hairspring

Definitions

  • the invention relates to a device for autonomously adjusting the active length of a spiral, for oscillator type balance spring.
  • the invention also relates to a watch movement comprising the autonomous adjustment device of the active length of a spiral and a balance-type oscillator spiral.
  • the invention further relates to a timepiece, including a watch, including the watch movement.
  • the outer end of the hairspring is immobilized by a pin fixed to a peg holder secured to a cock.
  • a racket movable in rotation relative to the bolt carrier is provided to adjust the active length of the hairspring, thereby adjusting the frequency of the sprung balance.
  • the racket is a lever, usually equipped with two arms, which pivots centered on the balance shaft coordinate.
  • a first arm of the racket for example two pins between which the spiral is free.
  • a second arm of the racket can be manually operated to rotate the racket of a certain angle around the balance shaft. This makes it possible to modify the actual position of the counting point.
  • the active length of the hairspring is reduced or increased.
  • a disadvantage of such a manual adjustment device is that the Earth's gravity influences the frequency of oscillations of the sprung balance depending on the orientation of the corresponding clock movement.
  • the running of a watch can have a significant difference in market between its horizontal and vertical positions, in particular.
  • the oscillations of the sprung balance cause a disruption of its active length and thus a slight variation in the frequency of the oscillations of the balance-hairspring assembly. .
  • a solution implementing a device for adjusting the active length of the hairspring wherein the racket carries clamping means for gripping an end portion of the hairspring to define the active length of the hairspring.
  • the outer end of the hairspring is further secured to a fastening system mounted movable relative to the racket and arranged to cooperate therewith.
  • the clamping means consisting for example of a pin-eccentric pinch system in which the end portion of the hairspring is pinched, can be loosened or tightened at leisure by a watchmaker.
  • the object of the invention is therefore to provide a device for adjusting the active length of a spiral, for a balance-spring type oscillator, making it possible to counterbalance in a simple, precise and autonomous manner the effects of gravity, in particular the disturbances of the isochronism of the balance of the oscillator, and overcoming the aforementioned drawbacks of the state of the art.
  • the invention relates to a device for autonomously adjusting the active length of a spiral, for a balance spring-type oscillator, which comprises the characteristics mentioned in the independent claim 1.
  • An advantage of the adjustment device according to the invention lies in the fact that it comprises resilient biasing means configured to exert an elastic return action in position on the racket, and a flyweight mounted free to rotate on the cock and connected to the swing arm of the racket.
  • a rotation of the weight, freely subjected to gravity thus causes a movement of the pivoting arm of the racket, between a rest position and a correction position of the device, and acts simultaneously on the means for modifying the active length of the spiral, to adjust the latter to compensate for disturbances of balance isochronism due to gravity.
  • the adjustment device according to the invention makes it possible to precisely compensate for the oscillator's movement as a function of its position in space, by counterbalancing the disturbances of the pendulum isochronism due to gravity, and this autonomously.
  • the adjustment device further comprises a drive cam of the pivoting arm of the racket, said cam being integral with the weight and in contact with the pivot arm.
  • the cam is in contact with the pivoting arm of the racket regardless of the position of the weight. This makes it possible to permanently compensate for the oscillator's movement as a function of its position in space, as well as to further improve the accuracy of the correction.
  • the resilient biasing means comprise an elastically deformable arm, a first end of the arm being in abutment with a piece integral with the cock, a second end of the arm being fixed to the racket.
  • the racket, the pivoting arm and the elastically deformable arm form a single piece of material. This reduces the size and improves the reliability of the adjustment device.
  • the adjusting device further comprises means for adjusting the elastic stress defined by the elastic stress means. This allows a user to be able to adjust the intensity of the elastic return action exerted on the racket, depending for example on the type of use desired for the watch equipped with the adjustment device.
  • the invention also relates to a watch movement comprising the adjustment device described above, and which comprises the characteristics mentioned in the dependent claim 14.
  • the invention also relates to a timepiece comprising the watch movement described above, and which comprises the characteristics mentioned in the dependent claim 15.
  • the figure 1 represents a part of a timepiece 1, which comprises a watch movement 2.
  • the timepiece 1 is a watch.
  • the watch movement 2 comprises an oscillator provided with a balance 4 and a hairspring 5, and a device 6 for adjusting the active length of the hairspring 5 in a conventional manner.
  • the hairspring 5 is fixed to a balance shaft 7 4 by its inner end (not visible).
  • the balance shaft 7 has a pivotally mounted end in a balance bridge (the latter is not visible in the figures for clarity).
  • the outer end of the hairspring 5 is fixed in a conventional manner to a peg 8 fixed to a peg carrier 10, the bolt carrier 10 being integral with a cock 12 by light tightening. More specifically, the bolt carrier 10 is pivotally mounted on the cock 12 concentrically to the balance shaft 7, as shown in FIG. figure 2 .
  • the balance shaft 4 is pivotally mounted in the cock 12.
  • the adjusting device 6 is mounted on a frame 13 of the watch movement 2 via the cock 12, and comprises a racket 14. As shown in FIG. figure 2 the racket 14 is pivotally mounted on the bolt carrier 10 concentrically with the balance shaft 7 4. The racket 14 comprises a pivoting arm 16 and means 18 for modifying the active length of the spiral 5.
  • the means 18 for modifying the active length of the hairspring 5 are able to modify the active length of the hairspring 5 by pivoting the racket 14.
  • the means 18 for modifying the active length of the hairspring 5 comprise two pins 19 fixed to the racket 14.
  • the hairspring 5 is arranged so that an outer turn 21 of the hairspring 5 passes between the two pins 19.
  • the two pins 19 act as a clamp for the outer turn 21 and are oriented in a plane substantially perpendicular to the frame 13 of the watch movement 2, in other words in a substantially vertical plane when the watch movement 2 extends in a horizontal plane.
  • both pins 19 are for example driven into a slot 23 formed in the racket 14, which allows to fix the pins 19 to the racket 14.
  • Lower main portions of the pins 19 and extend from the side of a lower face 14a of the racquet 14, allowing the outer turn 21 of the hairspring 5 to be arranged between these lower main portions.
  • the pins 19 have a substantially parallelepiped shape. Nevertheless, any other shape than the parallelepipedal shape is possible for the pins 19 in the context of the present invention.
  • the adjusting device 6 further comprises elastic stressing means 20 and a flyweight 22.
  • the adjusting device 6 further comprises a cam 24 for driving the pivoting arm 16 of the racket 14.
  • the adjusting device 6 may also comprise means 26 for adjusting the elastic stress defined by the elastic stressing means 20, and shock absorbing means 28.
  • the resilient biasing means 20 are configured to exert an elastic return action in position on the racket 14. More specifically, the elastic biasing means 20 are configured to exert, on the racket 14, an elastic return action to a position of rest of the adjusting device 6 illustrated on the figure 3 .
  • the resilient biasing means 20 comprise an elastically deformable arm 30. A first end 32a of the arm 30 bears against a piece 34 integral with the cock 12, making it possible to put the arm 30 in elastic stress.
  • the cock 12 may for example be provided on a side surface 12a, a flange 36 for supporting and guiding the deformable arm 30.
  • the piece 34 is for example constituted by the means 26 of adjustment of the elastic stress, as will be detailed later, but may alternatively be formed of a pin secured to the cock 12.
  • a second end 32b of the arm 30 is fixed to the racket 14.
  • the racket 14, the pivot arm 16 and the elastically deformable arm 30 form a single piece of material.
  • the piece of material formed by the racket 14, the pivoting arm 16 and the elastically deformable arm 30 for example defines a shape substantially "U", the pivot arm 16 and the elastically deformable arm 30 forming the two branches of the "U"".
  • the weight 22 is rotatably mounted on the cock 12 and is connected to the pivoting arm 16 of the racket 14 so that a rotation of the weight 22 causes a displacement of the pivot arm 16 of the racket 14 and acts simultaneously on the means 18 for modifying the active length of the hairspring 5.
  • the displacement of the pivoting arm 16 of the racket 14 under the effect of the rotation of the weight 22, itself subject to the gravity is effected between a rest position of the device 6, illustrated on the figure 3 , and a correction position of the device 6, illustrated on the figure 4 .
  • the flyweight 22 is for example made of a half-full disc.
  • the weight 22 consists of a solid two-material disk, the two disk materials having distinct densities.
  • the weight 22 is mounted free to rotate on the plate 13.
  • the cam 24 is integral with the weight 22 and is in contact with the pivot arm 16.
  • the flyweight 22 is rotatably mounted on the cock 12 via an axis 38 integral with the flyweight 22.
  • the cam 24 is mounted on the flyweight 22 concentrically with the axis 38 and is integral with the axis 38.
  • the cam 24 is a radial cam with an external profile.
  • a radial cam 24 with a substantially rectangular outer profile is shown on the Figures 1 to 4 in practice any type of shape can be envisaged for the outer profile of the cam 24, depending on the type of hairspring 5 used.
  • a radial cam with external triangular profile, oblong or ovoid may also be used in the context of the present invention.
  • a flat portion 40 of the cam 24 is in contact with the pivot arm 16 of the racket 14, while in the position of correction of the device 6, a corner or an angle 42 of the cam 24 is in contact with the pivoting arm 16. More preferably, as visible on the figures 1 , 3 and 4 the cam 24 is in contact with the pivoting arm 16 of the racket 14 irrespective of the position of the weight 22.
  • the cam 24 is arranged between the pivoting arm 16 and the elastically deformable arm 30 of so that the cam 24 serves as a support for the pivot arm 16 and thus contributes to the elastic stress of the elastically deformable arm 30.
  • the support part 34 of the resiliently deformable arm 30 is also arranged between the pivot arm 16 and the elastically deformable arm 30, in the recess between the two branches of the "U".
  • the means for adjusting the elastic stress 26 may serve as part 34 for supporting the resiliently deformable arm 30.
  • the elastic stress adjusting means 26 comprise a button for adjusting the elastic stress 44, movable between several adjustment positions.
  • the adjustment knob 44 is preferably operable from outside the timepiece 1 by a user, by any means known to those skilled in the art such as, in particular, a push button or a telescope.
  • the adjustment button of the elastic constraint 44 has for example an outer profile defining a radial contour of variable radius.
  • the adjusting knob 44 acts as a part 34 for supporting the elastically deformable arm 30, this makes it possible to modify the position of the arm 30 with respect to the pivoting arm 16, and thus to modify the intensity of the elastic stress exerted on the the racket 14, as a function of the position of the adjustment knob 44.
  • the triggering threshold of the cam assembly 24 / weight 22 is thus modified, making it possible to adapt the device of FIG. setting 6 according to the use desired by the user.
  • the adjustment button 44 can be movable between three adjustment positions, corresponding to uses in sedentary mode, in normal mode, or in sports mode of the shows.
  • the shock absorbing means 28 are arranged on the racket 14 and are at least partially supported on the balance shaft 7 4.
  • the shock absorbing means 28 comprise for example a conventional shock absorber 46 in which is chased a clover spring 48.
  • the weight 22 can rotate about its axis of rotation and thus cause a displacement of the pivoting arm 16 of the racket 14, as illustrated on the Figures 3 and 4 .
  • this rotation of the feeder 22 acts simultaneously on the means 18 for modifying the active length of the hairspring 5, making it possible to continuously adjust the active length of the hairspring in order to compensate for the disturbances of the pendulum isochronism due to the gravity.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Springs (AREA)
  • Toys (AREA)
  • Stringed Musical Instruments (AREA)
  • Manipulator (AREA)

Abstract

La présente invention se rapporte à un dispositif de réglage autonome de la longueur active d'un spiral, comprenant une raquette montée sur une platine, par l'intermédiaire d'un coq, un porte-piton étant monté à pivotement sur le coq, la raquette étant montée à pivotement sur le porte-piton et comprenant un bras de pivotement et des moyens de modification de la longueur active du spiral par pivotement de la raquette. Selon l'invention, le dispositif comprend des moyens de contrainte élastique configurés pour exercer une action élastique de rappel en position sur la raquette, et une masselotte montée libre en rotation sur le coq et reliée au bras de pivotement de la raquette agencée pour déplacer le bras de pivotement de la raquette, entre une position de repos et une position de correction du dispositif, et agisse simultanément sur les moyens de modification de la longueur active du spiral.The present invention relates to a device for autonomously adjusting the active length of a hairspring, comprising a racket mounted on a plate, via a rooster, a peg holder being pivotally mounted on the cock, the racket being pivotally mounted on the bolt carrier and comprising a pivot arm and means for modifying the active length of the spiral by pivoting the racket. According to the invention, the device comprises resilient biasing means configured to exert an elastic return action in position on the racket, and a flyweight mounted freely rotatable on the cock and connected to the pivoting arm of the racket arranged to move the arm of pivoting of the racket, between a rest position and a correction position of the device, and acts simultaneously on the means for modifying the active length of the spiral.

Description

DOMAINE TECHNIQUE DE L'INVENTIONTECHNICAL FIELD OF THE INVENTION

L'invention concerne un dispositif de réglage autonome de la longueur active d'un spiral, pour oscillateur de type balancier-spiral.The invention relates to a device for autonomously adjusting the active length of a spiral, for oscillator type balance spring.

L'invention concerne également un mouvement horloger comportant le dispositif de réglage autonome de la longueur active d'un spiral et un oscillateur de type balancier-spiral.The invention also relates to a watch movement comprising the autonomous adjustment device of the active length of a spiral and a balance-type oscillator spiral.

L'invention concerne en outre une pièce d'horlogerie, notamment une montre, comportant le mouvement horloger.The invention further relates to a timepiece, including a watch, including the watch movement.

ETAT DE LA TECHNIQUESTATE OF THE ART

Dans le domaine des montres munies d'oscillateurs mécaniques de type balancier-spiral, on connait des mécanismes de réglage manuel de la longueur active du spiral.In the field of watches equipped with mechanical oscillators sprung-balance type, there are known mechanisms for manual adjustment of the active length of the spiral.

Par exemple, dans des mécanismes de réglage manuel courants, l'extrémité externe du spiral est immobilisée par un piton fixé à un porte-piton solidaire d'un coq. Une raquette mobile en rotation par rapport au porte-piton est prévue pour ajuster la longueur active du spiral, permettant ainsi d'ajuster la fréquence du balancier-spiral. La raquette est un levier, généralement muni de deux bras, qui pivote centré sur la coordonnée de l'arbre de balancier. Un premier bras de la raquette porte par exemples deux goupilles entre lesquelles le spiral est libre. Un deuxième bras de la raquette peut être actionné manuellement pour faire pivoter la raquette d'un certain angle autour de l'arbre de balancier. Ceci permet de modifier la position réelle du point de comptage. Lorsque la raquette pivote, la longueur active du spiral est réduite ou augmentée. Toutefois, un inconvénient d'un tel dispositif de réglage manuel est que la gravité terrestre influence la fréquence des oscillations du balancier-spiral en fonction de l'orientation du mouvement horloger correspondant. Ainsi, la marche d'une montre peut présenter un écart de marche important entre ses positions horizontale et verticale, notamment. En outre, lorsque le spiral se déplace entre les goupilles à cause du jeu entre ces deux derniers, les oscillations du balancier-spiral entraînent une perturbation de sa longueur active et donc une variation légère de la fréquence des oscillations de l'ensemble balancier-spiral.For example, in current manual adjustment mechanisms, the outer end of the hairspring is immobilized by a pin fixed to a peg holder secured to a cock. A racket movable in rotation relative to the bolt carrier is provided to adjust the active length of the hairspring, thereby adjusting the frequency of the sprung balance. The racket is a lever, usually equipped with two arms, which pivots centered on the balance shaft coordinate. A first arm of the racket for example two pins between which the spiral is free. A second arm of the racket can be manually operated to rotate the racket of a certain angle around the balance shaft. This makes it possible to modify the actual position of the counting point. When the racket pivots, the active length of the hairspring is reduced or increased. However, a disadvantage of such a manual adjustment device is that the Earth's gravity influences the frequency of oscillations of the sprung balance depending on the orientation of the corresponding clock movement. Thus, the running of a watch can have a significant difference in market between its horizontal and vertical positions, in particular. In addition, when the hairspring moves between the pins because of the clearance between the latter two, the oscillations of the sprung balance cause a disruption of its active length and thus a slight variation in the frequency of the oscillations of the balance-hairspring assembly. .

Afin de limiter les effets négatifs de la gravité il est connu, notamment du document brevet CH 705 605 B1 , une solution mettant en oeuvre un dispositif de réglage de la longueur active du spiral, dans lequel la raquette porte des moyens de pinçage destinés à pincer une portion terminale du spiral pour définir la longueur active de ce dernier. L'extrémité externe du spiral est en outre solidaire d'un système de fixation monté mobile par rapport à la raquette et agencé pour coopérer avec celle-ci. Les moyens de pinçage, constitués par exemple d'un système de pincement goupille-excentrique dans lequel la portion terminale du spiral est pincée, peuvent être desserrés ou serrés à loisir par un horloger. Lorsque l'horloger a desserré le système de pincement à goupille-excentrique, il peut déplacer le système de fixation au moyen d'un outil, permettant ainsi de déplacer le spiral relativement à la raquette qui reste fixe, et donc par rapport à la goupille, ce qui permet de modifier la longueur active du spiral. L'horloger peut alors pincer le spiral contre la goupille en resserrant le système de pincement, pour replacer le dispositif de réglage en position de service. Toutefois, une telle solution reste une solution de réglage manuel, ce qui a comme inconvénient de limiter considérablement la précision du réglage permettant de contrebalancer les effets de la gravité. En outre, une telle solution est fastidieuse à mettre en oeuvre, du fait des différentes étapes d'ajustement manuel par un horloger permettant le réglage.In order to limit the negative effects of gravity, it is known, in particular from the patent document CH 705 605 B1 , a solution implementing a device for adjusting the active length of the hairspring, wherein the racket carries clamping means for gripping an end portion of the hairspring to define the active length of the hairspring. The outer end of the hairspring is further secured to a fastening system mounted movable relative to the racket and arranged to cooperate therewith. The clamping means, consisting for example of a pin-eccentric pinch system in which the end portion of the hairspring is pinched, can be loosened or tightened at leisure by a watchmaker. When the watchmaker has loosened the pin-eccentric pinch system, he can move the fastening system by means of a tool, thereby moving the balance spring relative to the racket which remains fixed, and therefore with respect to the pin , which makes it possible to modify the active length of the hairspring. The watchmaker can then pinch the hairspring against the pin by tightening the pinch system to return the adjustment device to the service position. However, such a solution remains a manual adjustment solution, which has the disadvantage of considerably limiting the accuracy of adjustment to counterbalance the effects of gravity. In addition, such solution is tedious to implement, because of the different stages of manual adjustment by a watchmaker for adjustment.

RÉSUMÉ DE L'INVENTIONSUMMARY OF THE INVENTION

L'invention a donc pour but de fournir un dispositif de réglage de la longueur active d'un spiral, pour oscillateur de type balancier-spiral, permettant de contrebalancer de manière simple, précise et autonome les effets de la gravité, notamment les perturbations de l'isochronisme du balancier de l'oscillateur, et palliant les inconvénients susmentionnés de l'état de la technique.The object of the invention is therefore to provide a device for adjusting the active length of a spiral, for a balance-spring type oscillator, making it possible to counterbalance in a simple, precise and autonomous manner the effects of gravity, in particular the disturbances of the isochronism of the balance of the oscillator, and overcoming the aforementioned drawbacks of the state of the art.

A cet effet, l'invention concerne un dispositif de réglage autonome de la longueur active d'un spiral, pour oscillateur de type balancier-spiral, qui comprend les caractéristiques mentionnées dans la revendication indépendante 1.To this end, the invention relates to a device for autonomously adjusting the active length of a spiral, for a balance spring-type oscillator, which comprises the characteristics mentioned in the independent claim 1.

Des formes particulières du dispositif de réglage sont définies dans les revendications dépendantes 2 à 13.Particular forms of the adjusting device are defined in the dependent claims 2 to 13.

Un avantage du dispositif de réglage selon l'invention réside dans le fait qu'il comprend des moyens de contrainte élastique configurés pour exercer une action élastique de rappel en position sur la raquette, et une masselotte montée libre en rotation sur le coq et reliée au bras de pivotement de la raquette. Une rotation de la masselotte, soumise librement à la gravité, entraîne ainsi un déplacement du bras de pivotement de la raquette, entre une position de repos et une position de correction du dispositif, et agit simultanément sur les moyens de modification de la longueur active du spiral, permettant d'ajuster cette dernière afin de compenser les perturbations de l'isochronisme du balancier dues à la gravité. De ce fait, le dispositif de réglage selon l'invention permet de compenser de manière précise la marche de l'oscillateur en fonction de sa position dans l'espace, en contrebalançant les perturbations de l'isochronisme du balancier dues à la gravité, et ce de manière autonome.An advantage of the adjustment device according to the invention lies in the fact that it comprises resilient biasing means configured to exert an elastic return action in position on the racket, and a flyweight mounted free to rotate on the cock and connected to the swing arm of the racket. A rotation of the weight, freely subjected to gravity, thus causes a movement of the pivoting arm of the racket, between a rest position and a correction position of the device, and acts simultaneously on the means for modifying the active length of the spiral, to adjust the latter to compensate for disturbances of balance isochronism due to gravity. As a result, the adjustment device according to the invention makes it possible to precisely compensate for the oscillator's movement as a function of its position in space, by counterbalancing the disturbances of the pendulum isochronism due to gravity, and this autonomously.

Selon un mode de réalisation préférentiel de l'invention, le dispositif de réglage comprend en outre une came d'entraînement du bras de pivotement de la raquette, ladite came étant solidaire de la masselotte et en contact avec le bras de pivotement.According to a preferred embodiment of the invention, the adjustment device further comprises a drive cam of the pivoting arm of the racket, said cam being integral with the weight and in contact with the pivot arm.

Avantageusement, la came est en contact avec le bras de pivotement de la raquette quelle que soit la position de la masselotte. Ceci permet de compenser en permanence la marche de l'oscillateur en fonction de sa position dans l'espace, ainsi que d'améliorer encore la précision de la correction.Advantageously, the cam is in contact with the pivoting arm of the racket regardless of the position of the weight. This makes it possible to permanently compensate for the oscillator's movement as a function of its position in space, as well as to further improve the accuracy of the correction.

Selon un mode de réalisation particulier de l'invention, les moyens de contrainte élastique comprennent un bras déformable élastiquement, une première extrémité du bras étant en appui contre une pièce solidaire du coq, une seconde extrémité du bras étant fixée à la raquette.According to a particular embodiment of the invention, the resilient biasing means comprise an elastically deformable arm, a first end of the arm being in abutment with a piece integral with the cock, a second end of the arm being fixed to the racket.

Avantageusement, la raquette, le bras de pivotement et le bras déformable élastiquement forment une seule et même pièce de matière. Ceci permet de réduire l'encombrement ainsi que d'améliorer la fiabilité du dispositif de réglage.Advantageously, the racket, the pivoting arm and the elastically deformable arm form a single piece of material. This reduces the size and improves the reliability of the adjustment device.

Avantageusement, le dispositif de réglage comprend en outre des moyens de réglage de la contrainte élastique définie par les moyens de contrainte élastique. Ceci permet à un utilisateur de pouvoir régler l'intensité de l'action élastique de rappel s'exerçant sur la raquette, en fonction par exemple du type d'utilisation souhaitée pour la montre équipée du dispositif de réglage.Advantageously, the adjusting device further comprises means for adjusting the elastic stress defined by the elastic stress means. This allows a user to be able to adjust the intensity of the elastic return action exerted on the racket, depending for example on the type of use desired for the watch equipped with the adjustment device.

A cet effet, l'invention concerne également un mouvement horloger comportant le dispositif de réglage décrit ci-dessus, et qui comprend les caractéristiques mentionnées dans la revendication dépendante 14.To this end, the invention also relates to a watch movement comprising the adjustment device described above, and which comprises the characteristics mentioned in the dependent claim 14.

A cet effet, l'invention concerne également une pièce d'horlogerie comportant le mouvement horloger décrit ci-dessus, et qui comprend les caractéristiques mentionnées dans la revendication dépendante 15.For this purpose, the invention also relates to a timepiece comprising the watch movement described above, and which comprises the characteristics mentioned in the dependent claim 15.

BRÈVE DESCRIPTION DES FIGURESBRIEF DESCRIPTION OF THE FIGURES

Les buts, avantages et caractéristiques du dispositif de réglage de la longueur active d'un spiral, ainsi que du mouvement horloger et de la pièce d'horlogerie le comprenant, apparaîtront mieux dans la description suivante sur la base d'au moins une forme d'exécution non limitative illustrée par les dessins sur lesquels :

  • la figure 1 est une vue en perspective d'un mouvement horloger d'une montre comprenant un dispositif de réglage de la longueur active d'un spiral selon l'invention ;
  • la figure 2 une vue en perspective éclatée du dispositif de réglage de la figure 1 ;
  • la figure 3 est une vue de dessus du dispositif de réglage de la figure 1, dans une position de repos du dispositif ;
  • la figure 4 est une vue analogue à celle de la figure 3, dans une position de correction du dispositif.
The aims, advantages and characteristics of the device for adjusting the active length of a spiral, as well as the watch movement and the timepiece comprising it, will appear better in the following description on the basis of at least one form of non-limiting embodiment illustrated by the drawings in which:
  • the figure 1 is a perspective view of a watch movement of a watch comprising a device for adjusting the active length of a hairspring according to the invention;
  • the figure 2 an exploded perspective view of the adjustment device of the figure 1 ;
  • the figure 3 is a top view of the adjustment device of the figure 1 in a rest position of the device;
  • the figure 4 is a view similar to that of the figure 3 in a correction position of the device.

DESCRIPTION DETAILLEE DE L'INVENTIONDETAILED DESCRIPTION OF THE INVENTION

Dans la description suivante, il est fait référence à un mouvement horloger muni d'un dispositif de réglage de la longueur active d'un spiral, pour oscillateur de type balancier-spiral. Les composants usuels du mouvement horloger, qui sont bien connus d'un homme du métier dans ce domaine technique, ne sont décrits que de manière simplifiée ou pas décrits du tout. L'homme du métier saura en effet adapter ces différents composants et les faire coopérer pour le fonctionnement du mouvement horloger. En particulier, tout ce qui concerne le mécanisme d'échappement du mouvement horloger ne sera pas décrit par la suite, bien qu'un tel mécanisme d'échappement puisse avantageusement coopérer avec le dispositif de réglage selon l'invention.In the following description, reference is made to a watch movement equipped with a device for adjusting the active length of a hairspring, for a balance-spring type oscillator. The usual components of the watch movement, which are well known to a person skilled in this technical field, are described only in a simplified manner or not described at all. Those skilled in the art will indeed adapt these different components and make them cooperate for the operation of the watch movement. In particular, all that concerns the escapement mechanism of the watch movement will not be described later, although such an exhaust mechanism may advantageously cooperate with the adjustment device according to the invention.

La figure 1 représente une partie d'une pièce d'horlogerie 1, qui comprend un mouvement horloger 2. Dans l'exemple de réalisation particulier de la figure 1, la pièce d'horlogerie 1 est une montre. Le mouvement horloger 2 comporte un oscillateur muni d'un balancier 4 et d'un spiral 5, et un dispositif 6 de réglage autonome de la longueur active du spiral 5. De manière conventionnelle, le spiral 5 est fixé à un arbre 7 de balancier 4 par son extrémité interne (non visible). L'arbre 7 de balancier 4 présente une extrémité montée à pivot dans un pont de balancier (ce dernier n'étant pas visible sur les figures pour plus de clarté). L'extrémité externe du spiral 5 est fixée de manière classique à un piton 8 fixé à un porte-piton 10, le porte-piton 10 étant solidaire d'un coq 12 par léger serrage. Plus précisément, le porte-piton 10 est monté à pivotement sur le coq 12 concentriquement à l'arbre 7 de balancier 4, comme illustré sur la figure 2. L'arbre 7 de balancier 4 est monté à pivotement dans le coq 12.The figure 1 represents a part of a timepiece 1, which comprises a watch movement 2. In the particular embodiment of the figure 1 , the timepiece 1 is a watch. The watch movement 2 comprises an oscillator provided with a balance 4 and a hairspring 5, and a device 6 for adjusting the active length of the hairspring 5 in a conventional manner. Conventionally, the hairspring 5 is fixed to a balance shaft 7 4 by its inner end (not visible). The balance shaft 7 has a pivotally mounted end in a balance bridge (the latter is not visible in the figures for clarity). The outer end of the hairspring 5 is fixed in a conventional manner to a peg 8 fixed to a peg carrier 10, the bolt carrier 10 being integral with a cock 12 by light tightening. More specifically, the bolt carrier 10 is pivotally mounted on the cock 12 concentrically to the balance shaft 7, as shown in FIG. figure 2 . The balance shaft 4 is pivotally mounted in the cock 12.

Le dispositif de réglage 6 est monté sur un bâti 13 du mouvement horloger 2 par l'intermédiaire du coq 12, et comprend une raquette 14. Comme représenté sur la figure 2, la raquette 14 est montée à pivotement sur le porte-piton 10 concentriquement à l'arbre 7 de balancier 4. La raquette 14 comprend un bras de pivotement 16 et des moyens 18 de modification de la longueur active du spiral 5.The adjusting device 6 is mounted on a frame 13 of the watch movement 2 via the cock 12, and comprises a racket 14. As shown in FIG. figure 2 the racket 14 is pivotally mounted on the bolt carrier 10 concentrically with the balance shaft 7 4. The racket 14 comprises a pivoting arm 16 and means 18 for modifying the active length of the spiral 5.

Les moyens 18 de modification de la longueur active du spiral 5 sont aptes à modifier la longueur active du spiral 5 par pivotement de la raquette 14. Dans un exemple de réalisation particulier illustré sur la figure 2, les moyens 18 de modification de la longueur active du spiral 5 comportent deux goupilles 19 fixées à la raquette 14. Le spiral 5 est agencé de sorte à ce qu'une spire extérieure 21 du spiral 5 passe entre les deux goupilles 19. Les deux goupilles 19 agissent comme une pince pour la spire extérieure 21 et sont orientées selon un plan sensiblement perpendiculaire au bâti 13 du mouvement horloger 2, autrement dit selon un plan sensiblement vertical lorsque le mouvement horloger 2 s'étend selon un plan horizontal. Comme illustré sur la figure 2, les extrémités supérieures des deux goupilles 19 sont par exemple chassées dans une fente 23 ménagée dans la raquette 14, ce qui permet de fixer les goupilles 19 à la raquette 14. Des portions principales inférieures des goupilles 19 s'étendent ainsi du côté d'une face inférieure 14a de la raquette 14, permettant à la spire extérieure 21 du spiral 5 de pouvoir être agencée entre ces portions principales inférieures. Dans l'exemple de réalisation particulier représenté à la figure 2, les goupilles 19 présentent une forme sensiblement parallélépipédique. Néanmoins, toute autre forme que la forme parallélépipédique est envisageable pour les goupilles 19 dans le cadre de la présente invention.The means 18 for modifying the active length of the hairspring 5 are able to modify the active length of the hairspring 5 by pivoting the racket 14. In a particular embodiment illustrated in FIG. figure 2 the means 18 for modifying the active length of the hairspring 5 comprise two pins 19 fixed to the racket 14. The hairspring 5 is arranged so that an outer turn 21 of the hairspring 5 passes between the two pins 19. The two pins 19 act as a clamp for the outer turn 21 and are oriented in a plane substantially perpendicular to the frame 13 of the watch movement 2, in other words in a substantially vertical plane when the watch movement 2 extends in a horizontal plane. As illustrated on the figure 2 , the upper ends of both pins 19 are for example driven into a slot 23 formed in the racket 14, which allows to fix the pins 19 to the racket 14. Lower main portions of the pins 19 and extend from the side of a lower face 14a of the racquet 14, allowing the outer turn 21 of the hairspring 5 to be arranged between these lower main portions. In the particular embodiment shown in figure 2 the pins 19 have a substantially parallelepiped shape. Nevertheless, any other shape than the parallelepipedal shape is possible for the pins 19 in the context of the present invention.

Le dispositif de réglage 6 comprend en outre des moyens de contrainte élastique 20 et une masselotte 22. Dans un exemple de réalisation préférentiel, le dispositif de réglage 6 comporte en outre une came 24 d'entraînement du bras de pivotement 16 de la raquette 14. De préférence, le dispositif de réglage 6 peut comporter également des moyens 26 de réglage de la contrainte élastique définie par les moyens de contrainte élastique 20, et des moyens d'amortissement de choc 28.The adjusting device 6 further comprises elastic stressing means 20 and a flyweight 22. In a preferred embodiment, the adjusting device 6 further comprises a cam 24 for driving the pivoting arm 16 of the racket 14. Preferably, the adjusting device 6 may also comprise means 26 for adjusting the elastic stress defined by the elastic stressing means 20, and shock absorbing means 28.

Les moyens de contrainte élastique 20 sont configurés pour exercer une action élastique de rappel en position sur la raquette 14. Plus précisément, les moyens de contrainte élastique 20 sont configurés pour exercer, sur la raquette 14, une action élastique de rappel vers une position de repos du dispositif de réglage 6 illustrée sur la figure 3. Selon un exemple de réalisation particulier, les moyens de contrainte élastique 20 comprennent un bras déformable élastiquement 30. Une première extrémité 32a du bras 30 est en appui contre une pièce 34 solidaire du coq 12, permettant de mettre le bras 30 en contrainte élastique. Pour faciliter cette mise sous contrainte élastique, le coq 12 peut par exemple être muni, sur une surface latérale 12a, d'un rebord 36 d'appui et de guidage du bras déformable 30. La pièce 34 est par exemple constituée des moyens 26 de réglage de la contrainte élastique, comme cela sera détaillé par la suite, mais peut en variante être formée d'un pion solidaire du coq 12. Une seconde extrémité 32b du bras 30 est fixée à la raquette 14. De préférence, comme représenté sur les figures 1 à 4, la raquette 14, le bras de pivotement 16 et le bras déformable élastiquement 30 forment une seule et même pièce de matière. La pièce de matière formée par la raquette 14, le bras de pivotement 16 et le bras déformable élastiquement 30 définit par exemple une forme sensiblement en « U », le bras de pivotement 16 et le bras déformable élastiquement 30 formant les deux branches du « U ».The resilient biasing means 20 are configured to exert an elastic return action in position on the racket 14. More specifically, the elastic biasing means 20 are configured to exert, on the racket 14, an elastic return action to a position of rest of the adjusting device 6 illustrated on the figure 3 . According to a particular embodiment, the resilient biasing means 20 comprise an elastically deformable arm 30. A first end 32a of the arm 30 bears against a piece 34 integral with the cock 12, making it possible to put the arm 30 in elastic stress. To facilitate this setting elastic stress, the cock 12 may for example be provided on a side surface 12a, a flange 36 for supporting and guiding the deformable arm 30. The piece 34 is for example constituted by the means 26 of adjustment of the elastic stress, as will be detailed later, but may alternatively be formed of a pin secured to the cock 12. A second end 32b of the arm 30 is fixed to the racket 14. Preferably, as represented on the Figures 1 to 4 , the racket 14, the pivot arm 16 and the elastically deformable arm 30 form a single piece of material. The piece of material formed by the racket 14, the pivoting arm 16 and the elastically deformable arm 30 for example defines a shape substantially "U", the pivot arm 16 and the elastically deformable arm 30 forming the two branches of the "U"".

Selon un mode de réalisation préférentiel, la masselotte 22 est montée libre en rotation sur le coq 12 et est reliée au bras de pivotement 16 de la raquette 14 de sorte à ce qu'une rotation de la masselotte 22 entraîne un déplacement du bras de pivotement 16 de la raquette 14 et agisse simultanément sur les moyens 18 de modification de la longueur active du spiral 5. Le déplacement du bras de pivotement 16 de la raquette 14 sous l'effet de la rotation de la masselotte 22, elle-même soumise à la gravité, s'effectue entre une position de repos du dispositif 6, illustrée sur la figure 3, et une position de correction du dispositif 6, illustrée sur la figure 4. Comme illustré sur les figures 1 à 4, la masselotte 22 est par exemple constituée d'un disque demi-plein. Dans une variante de réalisation non représentée sur les figures, la masselotte 22 est constituée d'un disque bi-matière plein, les deux matières du disque présentant des densités distinctes.According to a preferred embodiment, the weight 22 is rotatably mounted on the cock 12 and is connected to the pivoting arm 16 of the racket 14 so that a rotation of the weight 22 causes a displacement of the pivot arm 16 of the racket 14 and acts simultaneously on the means 18 for modifying the active length of the hairspring 5. The displacement of the pivoting arm 16 of the racket 14 under the effect of the rotation of the weight 22, itself subject to the gravity is effected between a rest position of the device 6, illustrated on the figure 3 , and a correction position of the device 6, illustrated on the figure 4 . As illustrated on Figures 1 to 4 , the flyweight 22 is for example made of a half-full disc. In an alternative embodiment not shown in the figures, the weight 22 consists of a solid two-material disk, the two disk materials having distinct densities.

Selon un autre mode de réalisation, la masselotte 22 est montée libre en rotation sur la platine 13.According to another embodiment, the weight 22 is mounted free to rotate on the plate 13.

Dans l'exemple de réalisation préférentiel selon lequel le dispositif 6 comprend une came 24 d'entraînement du bras de pivotement 16 de la raquette 14, la came 24 est solidaire de la masselotte 22 et est en contact avec le bras de pivotement 16. Dans une variante de réalisation de cet exemple préférentiel, illustrée sur les figures 1 à 4, la masselotte 22 est montée libre en rotation sur le coq 12 via un axe 38 solidaire de la masselotte 22. La came 24 est montée sur la masselotte 22 concentriquement à l'axe 38 et est solidaire de l'axe 38.In the preferred embodiment in which the device 6 comprises a cam 24 driving the pivot arm 16 of the racket 14, the cam 24 is integral with the weight 22 and is in contact with the pivot arm 16. In an alternative embodiment of this preferred example, illustrated on the Figures 1 to 4 , the flyweight 22 is rotatably mounted on the cock 12 via an axis 38 integral with the flyweight 22. The cam 24 is mounted on the flyweight 22 concentrically with the axis 38 and is integral with the axis 38.

De préférence, la came 24 est une came radiale à profil extérieur. Bien qu'une came radiale 24 à profil extérieur sensiblement rectangulaire soit représentée sur les figures 1 à 4, en pratique tout type de forme peut être envisagé pour le profil extérieur de la came 24, en fonction du type de spiral 5 utilisé. Par exemple, une came radiale à profil extérieur triangulaire, oblongue ou encore ovoïde peut également être utilisée dans le cadre de la présente invention. De préférence, et comme représenté sur les figures 3 et 4, en position de repos du dispositif de réglage 6, une portion plane 40 de la came 24 est en contact avec le bras de pivotement 16 de la raquette 14, tandis qu'en position de correction du dispositif 6, un coin ou un angle 42 de la came 24 est en contact avec le bras de pivotement 16. De préférence encore, comme visible sur les figures 1, 3 et 4, la came 24 est en contact avec le bras de pivotement 16 de la raquette 14 quelle que soit la position de la masselotte 22.Preferably, the cam 24 is a radial cam with an external profile. Although a radial cam 24 with a substantially rectangular outer profile is shown on the Figures 1 to 4 in practice any type of shape can be envisaged for the outer profile of the cam 24, depending on the type of hairspring 5 used. For example, a radial cam with external triangular profile, oblong or ovoid may also be used in the context of the present invention. Preferably, and as shown on the Figures 3 and 4 in the rest position of the adjusting device 6, a flat portion 40 of the cam 24 is in contact with the pivot arm 16 of the racket 14, while in the position of correction of the device 6, a corner or an angle 42 of the cam 24 is in contact with the pivoting arm 16. More preferably, as visible on the figures 1 , 3 and 4 the cam 24 is in contact with the pivoting arm 16 of the racket 14 irrespective of the position of the weight 22.

Dans l'exemple de réalisation particulier illustré sur les figures 1 à 4 selon lequel la pièce de matière formée par la raquette 14, le bras de pivotement 16 et le bras déformable élastiquement 30 définit une forme sensiblement en « U », la came 24 est agencée entre le bras de pivotement 16 et le bras déformable élastiquement 30 de sorte à ce que la came 24 serve d'appui au bras de pivotement 16 et contribue ainsi à la mise sous contrainte élastique du bras déformable élastiquement 30. Dans cet exemple de réalisation particulier, la pièce 34 de support du bras déformable élastiquement 30 est également agencée entre le bras de pivotement 16 et le bras déformable élastiquement 30, dans l'évidement entre les deux branches du « U ».In the particular embodiment illustrated on the Figures 1 to 4 according to which the piece of material formed by the racket 14, the pivoting arm 16 and the elastically deformable arm 30 defines a substantially "U" shape, the cam 24 is arranged between the pivoting arm 16 and the elastically deformable arm 30 of so that the cam 24 serves as a support for the pivot arm 16 and thus contributes to the elastic stress of the elastically deformable arm 30. In this particular embodiment, the support part 34 of the resiliently deformable arm 30 is also arranged between the pivot arm 16 and the elastically deformable arm 30, in the recess between the two branches of the "U".

Les moyens de réglage de la contrainte élastique 26 peuvent servir de pièce 34 de support du bras déformable élastiquement 30. Selon un exemple de réalisation particulier, illustré sur les figures 1 à 4, les moyens de réglage de la contrainte élastique 26 comprennent un bouton de réglage de la contrainte élastique 44, mobile entre plusieurs positions de réglage. Le bouton de réglage 44 est de préférence actionnable de l'extérieur de la pièce d'horlogerie 1 par un utilisateur, par tout moyen connu de l'homme du métier tel que, notamment, un bouton poussoir ou encore une lunette.The means for adjusting the elastic stress 26 may serve as part 34 for supporting the resiliently deformable arm 30. According to a particular embodiment, illustrated in FIGS. Figures 1 to 4 , the elastic stress adjusting means 26 comprise a button for adjusting the elastic stress 44, movable between several adjustment positions. The adjustment knob 44 is preferably operable from outside the timepiece 1 by a user, by any means known to those skilled in the art such as, in particular, a push button or a telescope.

Le bouton de réglage de la contrainte élastique 44 présente par exemple un profil extérieur définissant un contour radial de rayon variable. Dans l'exemple illustratif des figures 1 à 4 selon lequel le bouton de réglage 44 fait office de pièce 34 de support du bras déformable élastiquement 30, cela permet de modifier la position du bras 30 par rapport au bras de pivotement 16, et donc de modifier l'intensité de la contrainte élastique exercée sur la raquette 14, en fonction de la position du bouton de réglage 44. En fonction de la position du bouton de réglage 44, le seuil de déclenchement de l'ensemble came 24 / masselotte 22 est ainsi modifié, permettant d'adapter le dispositif de réglage 6 en fonction de l'utilisation souhaitée par l'utilisateur. Par exemple, dans le cas où la pièce d'horlogerie 1 est une montre, le bouton de réglage 44 peut être mobile entre trois positions de réglage, correspondant à des utilisations en mode sédentaire, en mode normal, ou encore en mode sportif de la montre.The adjustment button of the elastic constraint 44 has for example an outer profile defining a radial contour of variable radius. In the illustrative example of Figures 1 to 4 according to which the adjusting knob 44 acts as a part 34 for supporting the elastically deformable arm 30, this makes it possible to modify the position of the arm 30 with respect to the pivoting arm 16, and thus to modify the intensity of the elastic stress exerted on the the racket 14, as a function of the position of the adjustment knob 44. Depending on the position of the adjustment knob 44, the triggering threshold of the cam assembly 24 / weight 22 is thus modified, making it possible to adapt the device of FIG. setting 6 according to the use desired by the user. For example, in the case where the timepiece 1 is a watch, the adjustment button 44 can be movable between three adjustment positions, corresponding to uses in sedentary mode, in normal mode, or in sports mode of the shows.

Les moyens d'amortissement de choc 28 sont agencés sur la raquette 14 et sont au moins partiellement en appui sur l'arbre 7 de balancier 4. Les moyens d'amortisseur de choc 28 comprennent par exemple un amortisseur de choc 46 usuel dans lequel est chassé un ressort trèfle 48.The shock absorbing means 28 are arranged on the racket 14 and are at least partially supported on the balance shaft 7 4. The shock absorbing means 28 comprise for example a conventional shock absorber 46 in which is chased a clover spring 48.

On conçoit ainsi qu'en fonction de la position du mouvement horloger 2 dans l'espace, la masselotte 22, soumise librement à la gravité, peut tourner autour de son axe de rotation et entraîner ainsi un déplacement du bras de pivotement 16 de la raquette 14, comme illustré sur les figures 3 et 4. Ce faisant, cette rotation de la masselotte 22 agit simultanément sur les moyens 18 de modification de la longueur active du spiral 5, permettant d'ajuster en continu la longueur active du spiral afin de compenser les perturbations de l'isochronisme du balancier dues à la gravité.It is thus conceived that, as a function of the position of the watch movement 2 in space, the weight 22, subjected freely to gravity, can rotate about its axis of rotation and thus cause a displacement of the pivoting arm 16 of the racket 14, as illustrated on the Figures 3 and 4 . In doing so, this rotation of the feeder 22 acts simultaneously on the means 18 for modifying the active length of the hairspring 5, making it possible to continuously adjust the active length of the hairspring in order to compensate for the disturbances of the pendulum isochronism due to the gravity.

Claims (16)

Dispositif (6) de réglage autonome de la longueur active d'un spiral (5), pour oscillateur (4, 5) de type balancier-spiral, comprenant une raquette (14) montée sur une platine (13) de mouvement horloger (2), par l'intermédiaire d'un coq (12) dans lequel pivote un arbre (7) de balancier (4), le spiral (5) comportant une extrémité interne solidaire de l'arbre (7) de balancier (4) et une extrémité externe solidaire d'un piton (8) fixé à un porte-piton (10), le porte-piton (10) étant monté à pivotement sur le coq (12) concentriquement à l'arbre (7) de balancier (4), la raquette (14) étant montée à pivotement sur le porte-piton (10) concentriquement à l'arbre (7) de balancier (4) et comprenant un bras de pivotement (16) et des moyens (18) de modification de la longueur active du spiral (5) par pivotement de la raquette (14) ;
caractérisé en ce qu'il comprend en outre : - des moyens de contrainte élastique (20) configurés pour exercer une action élastique de rappel en position sur la raquette (14) ; - une masselotte (22) montée libre en rotation sur le coq (12) et reliée au bras (16) de pivotement de la raquette (14) de sorte à ce qu'une rotation de la masselotte (22) entraîne un déplacement du bras (16) de pivotement de la raquette (14), entre une position de repos et une position de correction du dispositif (6), et agisse simultanément sur les moyens (18) de modification de la longueur active du spiral (5). Device (6) for the autonomous adjustment of the active length of a spiral (5), for oscillator (4, 5) of the spiral-balance type, comprising a racket (14) mounted on a watch movement platen (13) (2) ), by means of a cock (12) in which pivots a shaft (7) of balance (4), the spiral (5) having an inner end secured to the shaft (7) balance (4) and an outer end secured to a peg (8) fixed to a bolt carrier (10), the peg carrier (10) being pivotally mounted on the cock (12) concentrically to the rocker shaft (7) (4). ), the racket (14) being pivotally mounted on the stud carrier (10) concentrically to the rocker shaft (7) and comprising a pivoting arm (16) and means (18) for modifying the the active length of the hairspring (5) by pivoting the racket (14);
characterized in that it further comprises: resilient biasing means (20) configured to exert an elastic return action in position on the racket (14); - A flyweight (22) rotatably mounted on the cock (12) and connected to the arm (16) of the racket pivoting (14) so that a rotation of the weight (22) causes a movement of the arm (16) pivoting the racket (14) between a rest position and a correction position of the device (6), and acts simultaneously on the means (18) for changing the active length of the spiral (5). Dispositif (6) de réglage autonome de la longueur active d'un spiral (5), pour oscillateur (4, 5) de type balancier-spiral, comprenant une raquette (14) montée sur une platine (13) de mouvement horloger (2), par l'intermédiaire d'un coq (12) dans lequel pivote un arbre (7) de balancier (4), le spiral (5) comportant une extrémité interne solidaire de l'arbre (7) de balancier (4) et une extrémité externe solidaire d'un piton (8) fixé à un porte-piton (10), le porte-piton (10) étant monté à pivotement sur le coq (12) concentriquement à l'arbre (7) de balancier (4), la raquette (14) étant montée à pivotement sur le porte-piton (10) concentriquement à l'arbre (7) de balancier (4) et comprenant un bras de pivotement (16) et des moyens (18) de modification de la longueur active du spiral (5) par pivotement de la raquette (14) ;
caractérisé en ce qu'il comprend en outre : - des moyens de contrainte élastique (20) configurés pour exercer une action élastique de rappel en position sur la raquette (14) ; - une masselotte (22) montée libre en rotation sur la platine (13) et reliée au bras (16) de pivotement de la raquette (14) de sorte à ce qu'une rotation de la masselotte (22) entraîne un déplacement du bras (16) de pivotement de la raquette (14), entre une position de repos et une position de correction du dispositif (6), et agisse simultanément sur les moyens (18) de modification de la longueur active du spiral (5). Device (6) for the autonomous adjustment of the active length of a spiral (5), for oscillator (4, 5) of the spiral-balance type, comprising a racket (14) mounted on a watch movement platen (13) (2) ), by means of a cock (12) in which pivots a shaft (7) of balance (4), the spiral (5) having an inner end secured to the shaft (7) balance (4) and an outer end secured to a peg (8) fixed to a bolt carrier (10), the peg carrier (10) being pivotally mounted on the cock (12) concentrically to the rocker shaft (7) (4). ), the racket (14) being pivotally mounted on the stud carrier (10) concentrically to the rocker shaft (7) and comprising a pivoting arm (16) and means (18) for changing the active length of the spiral (5). ) by pivoting the racket (14);
characterized in that it further comprises: resilient biasing means (20) configured to exert an elastic return action in position on the racket (14); - A flyweight (22) rotatably mounted on the plate (13) and connected to the arm (16) pivoting the racket (14) so that a rotation of the weight (22) causes a movement of the arm (16) pivoting the racket (14) between a rest position and a correction position of the device (6), and acts simultaneously on the means (18) for changing the active length of the spiral (5). Dispositif (6) de réglage autonome de la longueur active d'un spiral (5) selon la revendication 1 ou 2, caractérisé en ce qu'il comprend en outre une came (24) d'entraînement du bras (16) de pivotement de la raquette (14), ladite came (24) étant solidaire de la masselotte (22) et en contact avec le bras de pivotement (16).Device (6) for autonomously adjusting the active length of a hairspring (5) according to claim 1 or 2, characterized in that it further comprises a cam (24) for driving the pivot arm (16). the racket (14), said cam (24) being integral with the weight (22) and in contact with the pivot arm (16). Dispositif (6) de réglage autonome de la longueur active d'un spiral (5) selon la revendication 3, caractérisé en ce que la masselotte (22) est montée libre en rotation sur le coq (12) via un axe (38) solidaire de la masselotte (22), la came (24) étant montée sur la masselotte (22) concentriquement audit axe (38) et étant solidaire dudit axe (38).Device (6) for autonomous adjustment of the active length of a hairspring (5) according to claim 3, characterized in that the weight (22) is mounted free to rotate on the cock (12) via a shaft (38) secured to the flyweight (22), the cam (24) being mounted on the flyweight (22) concentrically to said axis (38) and being integral with said axis (38). Dispositif (6) de réglage autonome de la longueur active d'un spiral (5) selon la revendication 3 ou 4, caractérisé en ce que la came (24) est une came radiale à profil extérieur.Device (6) for autonomous adjustment of the active length of a hairspring (5) according to claim 3 or 4, characterized in that the cam (24) is a radial cam with an external profile. Dispositif (6) de réglage autonome de la longueur active d'un spiral (5) selon l'une des revendications 3 à 5, caractérisé en ce que, en position de repos du dispositif (6), une portion plane (40) de la came (24) est en contact avec le bras (16) de pivotement de la raquette (14), et, en position de correction du dispositif (6), un coin ou un angle (42) de la came (24) est en contact avec le bras de pivotement (16).Device (6) for autonomously adjusting the active length of a hairspring (5) according to one of Claims 3 to 5, characterized in that , in the rest position of the device (6), a planar portion (40) of the cam (24) is in contact with the arm (16) of pivoting of the racket (14), and in the position of correction of the device (6), a corner or an angle (42) of the cam (24) is in contact with the arm pivoting (16). Dispositif (6) de réglage autonome de la longueur active d'un spiral (5) selon l'une des revendications 3 à 6, caractérisé en ce que la came (24) est en contact avec le bras (16) de pivotement de la raquette (14) quelle que soit la position de la masselotte (22).Device (6) for autonomous adjustment of the active length of a hairspring (5) according to one of claims 3 to 6, characterized in that the cam (24) is in contact with the pivot arm (16) of the racquet (14) regardless of the position of the weight (22). Dispositif (6) de réglage autonome de la longueur active d'un spiral (5) selon l'une quelconque des revendications précédentes, caractérisé en ce que les moyens de contrainte élastique (20) comprennent un bras déformable élastiquement (30), une première extrémité (32a) du bras (30) étant en appui contre une pièce (34) solidaire du coq (12), une seconde extrémité (32b) du bras (30) étant fixée à la raquette (14).Device (6) for autonomously adjusting the active length of a hairspring (5) according to any one of the preceding claims, characterized in that the elastic stressing means (20) comprise an elastically deformable arm (30), a first end (32a) of the arm (30) bearing against a piece (34) integral with the cock (12), a second end (32b) of the arm (30) being fixed to the racket (14). Dispositif (6) de réglage autonome de la longueur active d'un spiral (5) selon la revendication 8, caractérisé en ce que la raquette (14), le bras de pivotement (16) et le bras déformable élastiquement (30) forment une seule et même pièce de matière.Device (6) for autonomous adjustment of the active length of a hairspring (5) according to claim 8, characterized in that the racket (14), the pivoting arm (16) and the elastically deformable arm (30) form a single and same piece of material. Dispositif (6) de réglage autonome de la longueur active d'un spiral (5) selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comprend en outre des moyens (26) de réglage de la contrainte élastique définie par les moyens de contrainte élastique (20).Device (6) for autonomously adjusting the active length of a hairspring (5) according to any one of the preceding claims, characterized in that it further comprises means (26) for adjusting the elastic stress defined by the resilient biasing means (20). Dispositif (6) de réglage autonome de la longueur active d'un spiral (5) selon l'une quelconque des revendications précédentes, caractérisé en ce que les moyens (18) de modification de la longueur active du spiral (5) comportent deux goupilles (19) fixées à la raquette (14), le spiral (5) étant agencé de sorte à ce qu'une spire extérieure (21) du spiral (5) passe entre les deux goupilles (19).Device (6) for autonomous adjustment of the active length of a hairspring (5) according to any one of the preceding claims, characterized in that the means (18) for modifying the active length of the hairspring (5) comprise two pins (19) fixed to the racket (14), the spiral (5) being arranged so that an outer turn (21) of the spiral (5) passes between the two pins (19). Dispositif (6) de réglage autonome de la longueur active d'un spiral (5) selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comprend en outre des moyens d'amortissement de choc (28), agencés sur la raquette (14) et au moins partiellement en appui sur l'arbre (7) de balancier (4).Device (6) for autonomous adjustment of the active length of a hairspring (5) according to any one of the preceding claims, characterized in that it furthermore comprises shock-absorbing means (28), arranged on the racquet (14) and at least partially resting on the shaft (7) balance (4). Dispositif (6) de réglage autonome de la longueur active d'un spiral (5) selon l'une quelconque des revendications précédentes, caractérisé en ce que la masselotte (22) est un demi-disque plein.Device (6) for autonomous adjustment of the active length of a hairspring (5) according to any one of the preceding claims, characterized in that the weight (22) is a half-full disc. Dispositif (6) de réglage autonome de la longueur active d'un spiral (5) selon l'une quelconque des revendications 1 à 11, caractérisé en ce que la masselotte (22) est un disque bi-matière plein, les deux matières présentant des densités distinctes.Device (6) for autonomous adjustment of the active length of a hairspring (5) according to any one of Claims 1 to 11, characterized in that the weight (22) is a solid two-material disk, the two materials presenting distinct densities. Mouvement horloger (2) comportant un oscillateur (4, 5) de type balancier-spiral et un dispositif (6) de réglage autonome de la longueur active du spiral (5), caractérisé en ce que le dispositif de réglage autonome (6) est conforme à l'une quelconque des revendications précédentes.Watch movement (2) comprising a balance-spring oscillator (4, 5) and a device (6) for autonomously adjusting the active length of the hairspring (5), characterized in that the autonomous adjustment device (6) is according to any one of the preceding claims. Pièce d'horlogerie (1) comportant un mouvement horloger (2), caractérisée en ce que le mouvement horloger (2) est conforme à la revendication 15.Timepiece (1) comprising a watch movement (2), characterized in that the watch movement (2) is in accordance with claim 15.
EP17208988.0A 2017-12-20 2017-12-20 Standalone device for adjusting the active length of a hairspring Active EP3502788B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
CH01574/17A CH714480A2 (en) 2017-12-20 2017-12-20 Autonomous adjustment device for the active length of a hairspring.
EP17208988.0A EP3502788B1 (en) 2017-12-20 2017-12-20 Standalone device for adjusting the active length of a hairspring
JP2018221969A JP6688371B2 (en) 2017-12-20 2018-11-28 Device that autonomously adjusts the effective length of the balance spring
CN201811492233.2A CN109991826B (en) 2017-12-20 2018-12-07 Device for automatically adjusting the effective length of a balance spring
US16/221,664 US11397410B2 (en) 2017-12-20 2018-12-17 Device for autonomous adjustment of the active length of a balance spring

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17208988.0A EP3502788B1 (en) 2017-12-20 2017-12-20 Standalone device for adjusting the active length of a hairspring

Publications (2)

Publication Number Publication Date
EP3502788A1 true EP3502788A1 (en) 2019-06-26
EP3502788B1 EP3502788B1 (en) 2021-03-17

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EP17208988.0A Active EP3502788B1 (en) 2017-12-20 2017-12-20 Standalone device for adjusting the active length of a hairspring

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US (1) US11397410B2 (en)
EP (1) EP3502788B1 (en)
JP (1) JP6688371B2 (en)
CN (1) CN109991826B (en)
CH (1) CH714480A2 (en)

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EP3839656B1 (en) * 2019-12-18 2023-12-13 Nivarox-FAR S.A. Horological balance
JP6751215B1 (en) * 2020-03-02 2020-09-02 セイコーウオッチ株式会社 Balance wheel setting mechanism, clock movement and clock
CN112327590B (en) * 2020-10-28 2021-08-20 深圳市格雅表业有限公司 Balance wheel mechanism and movement applying same

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Also Published As

Publication number Publication date
JP2019113535A (en) 2019-07-11
CH714480A2 (en) 2019-06-28
CN109991826A (en) 2019-07-09
EP3502788B1 (en) 2021-03-17
US11397410B2 (en) 2022-07-26
US20190187618A1 (en) 2019-06-20
CN109991826B (en) 2021-03-05
JP6688371B2 (en) 2020-04-28

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