EP3021173A1 - Annular oscillating mass and timepiece comprising such an oscillating mass - Google Patents

Annular oscillating mass and timepiece comprising such an oscillating mass Download PDF

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Publication number
EP3021173A1
EP3021173A1 EP14193348.1A EP14193348A EP3021173A1 EP 3021173 A1 EP3021173 A1 EP 3021173A1 EP 14193348 A EP14193348 A EP 14193348A EP 3021173 A1 EP3021173 A1 EP 3021173A1
Authority
EP
European Patent Office
Prior art keywords
annular
oscillating
drive ring
flexible rods
oscillating mass
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
EP14193348.1A
Other languages
German (de)
French (fr)
Other versions
EP3021173B1 (en
Inventor
Marco Rochat
Samuel Cordier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Blancpain SA
Original Assignee
Blancpain SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Blancpain SA filed Critical Blancpain SA
Priority to EP14193348.1A priority Critical patent/EP3021173B1/en
Priority to US14/930,746 priority patent/US9557712B2/en
Priority to JP2015221854A priority patent/JP6293719B2/en
Priority to RU2015148885A priority patent/RU2620489C2/en
Priority to CN201510781705.6A priority patent/CN105607455B/en
Publication of EP3021173A1 publication Critical patent/EP3021173A1/en
Application granted granted Critical
Publication of EP3021173B1 publication Critical patent/EP3021173B1/en
Priority to JP2017177404A priority patent/JP6381758B2/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
    • G04B5/00—Automatic winding up
    • G04B5/02—Automatic winding up by self-winding caused by the movement of the watch
    • G04B5/04—Automatic winding up by self-winding caused by the movement of the watch by oscillating weights the movement of which is limited
    • 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
    • G04B5/00—Automatic winding up
    • G04B5/02—Automatic winding up by self-winding caused by the movement of the watch
    • G04B5/10—Automatic winding up by self-winding caused by the movement of the watch by oscillating weights the movement of which is not limited
    • G04B5/12—Automatic winding up by self-winding caused by the movement of the watch by oscillating weights the movement of which is not limited acting in one direction only
    • 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
    • G04B5/00—Automatic winding up
    • G04B5/02—Automatic winding up by self-winding caused by the movement of the watch
    • G04B5/16—Construction of the weights
    • G04B5/165—Weights consisting of several parts
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B43/00—Protecting clockworks by shields or other means against external influences, e.g. magnetic fields
    • G04B43/002—Component shock protection arrangements
    • 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
    • G04B5/00—Automatic winding up
    • G04B5/02—Automatic winding up by self-winding caused by the movement of the watch
    • G04B5/10—Automatic winding up by self-winding caused by the movement of the watch by oscillating weights the movement of which is not limited
    • G04B5/14—Automatic winding up by self-winding caused by the movement of the watch by oscillating weights the movement of which is not limited acting in both directions
    • 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
    • G04B5/00—Automatic winding up
    • G04B5/02—Automatic winding up by self-winding caused by the movement of the watch
    • G04B5/16—Construction of the weights
    • 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
    • G04B5/00—Automatic winding up
    • G04B5/02—Automatic winding up by self-winding caused by the movement of the watch
    • G04B5/18—Supports, suspensions or guide arrangements, for oscillating weights
    • G04B5/184—Guide arrangement of the moving weight in a circular course
    • 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
    • G04B5/00—Automatic winding up
    • G04B5/02—Automatic winding up by self-winding caused by the movement of the watch
    • G04B5/18—Supports, suspensions or guide arrangements, for oscillating weights
    • G04B5/188—Bearing, guide arrangements or suspension of the movement forming oscillating weight

Definitions

  • the present invention relates to an annular oscillating mass comprising a drive ring comprising an annular transmission portion provided with a toothing coaxial with the ring, and a heavy sector attached to the drive ring.
  • the present invention also relates to a timepiece movement and a timepiece with automatic winding which respectively comprise the annular oscillating weight of the invention.
  • the function of the rollers is to guide the ring and to minimize friction.
  • they are preferably mounted on ball bearings.
  • the rollers must be at least three in number.
  • a known problem with the annular oscillating masses which correspond to the description above is related to the relative fragility of the rollers in view of the considerable inertia of the oscillating mass.
  • the considerable weight of the oscillating mass may, for example, lead to a break in the axis of the rollers, or alternatively cause the bearing to seize. balls.
  • the axial displacement of the oscillating mass may damage the gear wheel which meshes with the drive ring.
  • the patent document CH 701 343 B1 proposes to mount each of the rollers on a damping member preferably constituted by a rocker biased by a spring.
  • the function of the damping members is to allow damping any inadvertent movement of the oscillating mass in the radial direction following an impact.
  • the solution proposed by the aforementioned patent document does not allow to dampen the movements of the oscillating mass in the axial direction.
  • An object of the present invention is to overcome the problems of the prior art which have just been exposed. It achieves this goal by providing an annular oscillating mass according to the appended claim 1.
  • the annular transmission portion of the drive ring and the heavy sector are connected directly or indirectly to one another.
  • the connection between the annular transmission part and the heavy sector is carried out by means of a plurality of elements of elastically deformable connection.
  • the elastically deformable connecting elements are constituted by flexible elastic rods.
  • This feature allows the heavy sector to deviate from its normal path in all directions relative to the annular transmission portion.
  • the longitudinal axes of the flexible rods preferably extend in the same plane parallel to the drive ring.
  • the flexible rods have at least one fork.
  • the rods have the general shape of a Y with a single fork.
  • the rods fork in two places, on either side of the middle of the rod.
  • the rods comprise two opposite forks which give them the general shape of a double Y.
  • the fork portions of the rods are preferably also contained in the plane parallel to the drive ring in which extends the longitudinal axis.
  • the fact that the branches have forks contained in a plane parallel to the drive ring has the advantage of increasing the restoring force in the event of stress in the tangential direction at the end. 'ring.
  • the invention also relates to a self-winding timepiece movement according to claim 10 of the patent as well as a self-winding timepiece according to claim 11 of the patent.
  • the figure 1 is a perspective view of an annular oscillating mass 3 corresponding to a first embodiment of the invention.
  • the oscillating mass shown comprises a drive ring 5 and a heavy sector 7.
  • the drive ring comprises a plurality of elastically deformable connecting elements 9 which extend between an annular transmission part 11 and a second annular portion 13.
  • the heavy sector 7 is carried by and secured to the second annular portion, while the annular transmission portion has a concentric inner toothing 15.
  • the elastically deformable connecting elements 9 have the shape of rods arranged parallel to the plane of the driving ring 5. These rods each have a fork giving them the shape of a Y having its upper portion facing the second annular portion 13. It may be noted that in the illustrated embodiment, the rods have their longitudinal axis oriented radially and that the branches of the fork deviate from the longitudinal axis in a plane parallel to the drive ring and are integral with the second annular portion 13.
  • the rods 9 are flexible so that they can be deformed in case of shock.
  • the rods shown are arranged to allow the second annular portion 13 to deviate from its equilibrium position relative to the annular transmission portion 11 in the three directions (axial, radial and tangential).
  • the oscillating mass 3 represented in the figure 1 is part of a self-winding timepiece of which only a winding mobile 17 and three rollers 19 are illustrated.
  • the winding mobile 17 comprises a gear which meshes with the internal toothing 15 of the drive ring 5.
  • the function of the mobile winding is to transmit the rotational movements of the oscillating mass to the winding mechanism (not shown) so as to arm the mainspring.
  • the rollers 19 are preferably equipped with ball bearings (not shown).
  • the function of the rollers is to support and guide the oscillating mass, so that it is free to turn crazy around the circle passing through the three rollers.
  • the annular transmission portion 11 of the drive ring 5 has an annular groove 21.
  • the groove 21 is arranged to cooperate with an equatorial bulge 23 that has the circumference of the rollers 19. It can be seen that the bulge 19 enters the groove 21. It will be understood that this arrangement ensures the axial positioning of the annular oscillating mass.
  • the oscillating mass 3 of the present example is designed to dampen shocks.
  • a small object like a watch receives a shock, it undergoes a sudden acceleration in the direction of the shock.
  • the sudden acceleration of the timepiece is transmitted to the oscillating weight that it contains by means of the rollers of
  • the inertia of the oscillating mass 3 is essentially located in the heavy sector 7, the latter exerts a considerable force of inertia on the rest of the oscillating mass.
  • this inertial force is oriented in the radial direction (parallel to the plane of the drive ring 5 and towards the axis of rotation of the oscillating mass), it produces a displacement of the second part. annular 13 relative to the annular transmission portion 11 in the plane of the drive ring. It will be understood that, according to the invention, this displacement is made possible by the deformation of the connecting elements (in this example, the bending deformation of the rods 9 or their fork), and that this displacement contributes to damping the shock, and in particular to protect the ball bearings of the rollers 19.
  • rollers 19 are arranged to maintain the oscillating mass 3 not only radially, but also axially through the cooperation between the equatorial bulge 23 and the groove 21.
  • the rollers also transmit to the oscillating weight l acceleration due to an axial impact exerted on the bottom or dial side of the timepiece.
  • the heavy sector exerts a considerable inertial force in the axial direction (perpendicular to the plane of the drive ring) on the rest of the oscillating mass.
  • This force produces a displacement of the second annular portion 13 relative to the annular transmission portion 11.
  • This displacement is oriented perpendicular to the plane of the drive ring 5. It will be understood that as before, this displacement is made possible by the flexion rods 9, and that this movement protects the rollers and the winding mobile by damping the shock suffered by the timepiece.
  • the Figures 4A, 4B and 4C schematically illustrate three embodiments of elastically deformable connecting elements.
  • the embodiment illustrated in the Figure 4A corresponds to that of the example just described.
  • the Figures 4B and 4C illustrate two other embodiments in which the connecting elements are also constituted by flexible rods arranged to deform elastically.
  • the flexible rods represented (referenced 29) each comprise a middle, an inner end and an outer end. It can be seen that the flexible rods are divided in two on either side of the middle towards each of the ends. This characteristic gives the rods the shape of a double Y.
  • the two forks of the double Y are each included in a plane parallel to the drive ring 5.
  • the flexible rods 39 of the realization of the figure 4C have a longitudinal axis which is not oriented in the radial direction but which form a non-zero angle with the radius in the center of the second annular portion 13 passing through the point of attachment of said radius.
  • the second annular portion could be concentrically disposed within the annular transmission portion.
  • the elastically deformable connecting elements are not necessarily constituted by flexible rods. Indeed, these connecting elements could alternatively be constituted by flip-flops (three or more) each associated with a spring.
  • the drive ring of the invention may be formed of a material comprising silicon, that is to say, for example, monocrystalline silicon, polycrystalline silicon, doped silicon monocrystalline, silicon doped polycrystalline doped silicon carbide or not doped or doped silicon nitride doped or non-doped silicon oxide such as quartz or silica.
  • the anisotropic etching of such materials can be carried out wet or dry and typically by an anisotropic attack of the deep reactive ion etching type also known by the abbreviation DRIE from the English term "Deep Reactive Ion Etching".
  • the drive ring of the invention may be formed of precious metal or not, typically by the electroforming technique known by the abbreviation L.I.G.A. from the German terms "RöntgenLithographie, Galvanoformung & Abformung” and in which a mold is filled at one or more levels with the aid of a metal, for example, by electroplating.
  • L.I.G.A. the electroforming technique known by the abbreviation L.I.G.A. from the German terms "RöntgenLithographie, Galvanoformung & Abformung”
  • a mold is filled at one or more levels with the aid of a metal, for example, by electroplating.
  • any type of electroforming, type L.I.G.A. or not, able to form a monoblock training ring at one or more levels is possible.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
  • Toys (AREA)
  • Electric Clocks (AREA)
  • Gears, Cams (AREA)

Abstract

La masse oscillante annulaire (3) comporte un anneau d'entraînement (5) et un secteur lourd (7). L'anneau d'entraînement (5) comprend une partie annulaire de transmission (11) qui présente une denture coaxiale (15) et une deuxième partie annulaire (13) concentrique à la partie annulaire de transmission, le secteur lourd étant fixé à la deuxième partie annulaire. L'anneau d'entraînement (5) comprend en outre une pluralité d'éléments de liaison (9) qui sont déformables élastiquement et qui relient la partie annulaire de transmission (11) à la deuxième partie annulaire (13).The annular oscillating mass (3) comprises a drive ring (5) and a heavy sector (7). The drive ring (5) comprises an annular transmission portion (11) having a coaxial toothing (15) and a second annular portion (13) concentric with the annular transmission portion, the heavy sector being attached to the second annular part. The drive ring (5) further comprises a plurality of elastically deformable connecting elements (9) which connect the annular transmission part (11) to the second annular part (13).

Description

DOMAINE DE L'INVENTIONFIELD OF THE INVENTION

La présente invention concerne une masse oscillante annulaire comportant un anneau d'entraînement comprenant une partie annulaire de transmission munie d'une denture coaxiale à l'anneau, et un secteur lourd fixé à l'anneau d'entraînement. La présente invention concerne également un mouvement d'horlogerie et une pièce d'horlogerie à remontage automatique qui comprennent respectivement la masse oscillante annulaire de l'invention.The present invention relates to an annular oscillating mass comprising a drive ring comprising an annular transmission portion provided with a toothing coaxial with the ring, and a heavy sector attached to the drive ring. The present invention also relates to a timepiece movement and a timepiece with automatic winding which respectively comprise the annular oscillating weight of the invention.

ART ANTERIEURPRIOR ART

On connait des montres automatiques équipées d'une masse oscillante annulaire. Cette masse oscillante est logée dans un passage circulaire aménagé autour du mouvement à l'intérieur de la boîte de montre. Des galets de roulement sont également agencés en bordure du passage pour supporter et guider la masse oscillante, de manière à ce qu'elle soit libre de tourner à l'intérieur du passage. L'anneau d'entraînement peut par exemple présenter une denture intérieure, grâce à laquelle les mouvements de rotation de la masse oscillante sont transmis mécaniquement au barillet du mouvement. La masse oscillante assure ainsi le remontage automatique du ressort de barillet.There are known automatic watches equipped with an annular oscillating mass. This oscillating mass is housed in a circular passage arranged around the movement inside the watch case. Rollers are also arranged along the passage to support and guide the oscillating mass, so that it is free to rotate inside the passage. The drive ring may for example have an internal toothing, thanks to which the rotational movements of the oscillating mass are mechanically transmitted to the barrel of the movement. The oscillating weight thus ensures the automatic winding of the mainspring.

La fonction des galets de roulement est de guider l'anneau et de limiter au maximum les frottements. A cet effet, ils sont de préférence montés sur roulements à billes. Pour fournir une assise stable à la masse oscillante, les galets de roulement doivent être au nombre de trois au minimum. Un problème connu avec les masses oscillantes annulaires qui correspondent à la description ci-dessus est lié à la relative fragilité des galets au vu de l'inertie considérable de la masse oscillante. En effet, en cas de choc exercé radialement sur la carrure de la pièce d'horlogerie, le poids considérable de la masse oscillante peut par exemple conduire à une rupture de l'axe des galets de roulement, ou alternativement faire se gripper le roulement à billes. Par ailleurs, en cas de choc sur le côté fond ou le côté cadran de la pièce d'horlogerie, le déplacement axial de la masse oscillante risque d'endommager la roue dentée qui engrène avec l'anneau d'entraînement.The function of the rollers is to guide the ring and to minimize friction. For this purpose, they are preferably mounted on ball bearings. To provide a stable base for the oscillating weight, the rollers must be at least three in number. A known problem with the annular oscillating masses which correspond to the description above is related to the relative fragility of the rollers in view of the considerable inertia of the oscillating mass. In fact, in the event of a shock exerted radially on the middle part of the timepiece, the considerable weight of the oscillating mass may, for example, lead to a break in the axis of the rollers, or alternatively cause the bearing to seize. balls. Moreover, in the event of impact on the bottom side or the dial side of the timepiece, the axial displacement of the oscillating mass may damage the gear wheel which meshes with the drive ring.

Dans le but de remédier au moins partiellement aux problèmes susmentionnés, le document de brevet CH 701 343 B1 propose de monter chacun des galets de roulement sur un organe amortisseur constitué de préférence par une bascule rappelée par un ressort. La fonction des organes amortisseurs est de permettre d'amortir tout mouvement intempestif de la masse oscillante dans le sens radial suite à un choc. On comprendra toutefois que la solution proposée par le document de brevet susmentionné ne permet pas d'amortir les mouvements de la masse oscillante dans le sens axial.In order to at least partially remedy the above-mentioned problems, the patent document CH 701 343 B1 proposes to mount each of the rollers on a damping member preferably constituted by a rocker biased by a spring. The function of the damping members is to allow damping any inadvertent movement of the oscillating mass in the radial direction following an impact. However, it will be understood that the solution proposed by the aforementioned patent document does not allow to dampen the movements of the oscillating mass in the axial direction.

BREF EXPOSE DE L'INVENTIONBRIEF SUMMARY OF THE INVENTION

Un but de la présente invention est de remédier aux problèmes de l'art antérieur qui viennent d'être exposés. Elle atteint ce but en fournissant une masse oscillante annulaire conforme à la revendication 1 annexée.An object of the present invention is to overcome the problems of the prior art which have just been exposed. It achieves this goal by providing an annular oscillating mass according to the appended claim 1.

Selon l'invention, la partie annulaire de transmission de l'anneau d'entraînement et le secteur lourd sont reliés directement ou indirectement l'un à l'autre. De plus, la liaison entre la partie annulaire de transmission et le secteur lourd est réalisée par l'intermédiaire d'une pluralité d'éléments de liaison déformables élastiquement. On comprendra donc, qu'en cas de choc, le secteur lourd a la possibilité de s'écarter jusqu'à un certain point de sa trajectoire normale sans que la partie annulaire de transmission ne soit forcée de faire de même que le mouvement de la masse après le choc soit radial ou axial. La denture coaxiale est portée par la partie annulaire de transmission et on comprendra donc que la présence des éléments de liaison déformables permet dans une certaine mesure de découpler mécaniquement le secteur lourd de la denture coaxiale. En particulier, lorsqu'un choc provoque une accélération brutale du secteur lourd, les éléments de liaison déformables permettent d'amortir cette accélération, et ainsi d'éviter que l'engrenage entre l'anneau d'entraînement et le dispositif de remontage ne soient endommagés.According to the invention, the annular transmission portion of the drive ring and the heavy sector are connected directly or indirectly to one another. In addition, the connection between the annular transmission part and the heavy sector is carried out by means of a plurality of elements of elastically deformable connection. It will therefore be understood that, in the event of an impact, the heavy sector has the possibility of deviating to a certain point of its normal trajectory without the annular transmission part being forced to do the same as the movement of the mass after the shock is radial or axial. The coaxial toothing is carried by the annular transmission portion and it will therefore be understood that the presence of deformable connecting elements allows to a certain extent to mechanically decouple the heavy sector of the coaxial toothing. In particular, when an impact causes a sudden acceleration of the heavy sector, the deformable connecting elements can dampen this acceleration, and thus prevent the gearing between the drive ring and the winding device are damaged.

Conformément à un mode de réalisation avantageux de l'invention, les éléments de liaison déformables élastiquement sont constitués par des tiges élastiques flexibles. Cette caractéristique donne la possibilité au secteur lourd de s'écarter de sa trajectoire normale dans toutes les directions relativement à la partie annulaire de transmission. Selon une variante avantageuse de ce mode de réalisation, les axes longitudinaux des tiges flexibles s'étendent de préférence dans un même plan parallèle à l'anneau d'entraînement. Un avantage de cette caractéristique est que les tiges opposent la même force de rappel à une sollicitation axiale de bas en haut qu'à une sollicitation axiale de haut en bas.According to an advantageous embodiment of the invention, the elastically deformable connecting elements are constituted by flexible elastic rods. This feature allows the heavy sector to deviate from its normal path in all directions relative to the annular transmission portion. According to an advantageous variant of this embodiment, the longitudinal axes of the flexible rods preferably extend in the same plane parallel to the drive ring. An advantage of this feature is that the rods oppose the same biasing force to an axial bias from the bottom up as to an axial bias from top to bottom.

Conformément à un mode de réalisation avantageux, les tiges flexibles présentent au moins une fourche. Selon une première variante de ce mode de réalisation particulier, les tiges ont la forme générale d'un Y avec une fourche unique. Selon une deuxième variante, les tiges fourchent en deux endroits, de part et d'autre du milieu de la tige. Autrement dit, selon la deuxième variante, les tiges comportent deux fourches opposées qui leurs donnent la forme générale d'un double Y. Conformément à l'une ou l'autre de ces deux dernières variantes, les parties en fourche des tiges sont de préférence également contenues dans le plan parallèle à l'anneau d'entraînement dans lequel s'étend l'axe longitudinal. Comme on le verra plus en détail plus loin, le fait que les branches présentent des fourches contenues dans un plan parallèle à l'anneau d'entraînement présente l'avantage d'augmenter la force de rappel en cas de sollicitation en direction tangentielle à l'anneau.According to an advantageous embodiment, the flexible rods have at least one fork. According to a first variant of this particular embodiment, the rods have the general shape of a Y with a single fork. According to a second variant, the rods fork in two places, on either side of the middle of the rod. In other words, according to the second variant, the rods comprise two opposite forks which give them the general shape of a double Y. In accordance with one or the other of these two last variants, the fork portions of the rods are preferably also contained in the plane parallel to the drive ring in which extends the longitudinal axis. As will be seen in more detail below, the fact that the branches have forks contained in a plane parallel to the drive ring has the advantage of increasing the restoring force in the event of stress in the tangential direction at the end. 'ring.

L'invention concerne également un mouvement d'horlogerie à remontage automatique conforme à la revendication 10 du brevet ainsi qu'une une pièce d'horlogerie à remontage automatique conforme à la revendication 11 du brevet.The invention also relates to a self-winding timepiece movement according to claim 10 of the patent as well as a self-winding timepiece according to claim 11 of the patent.

BREVE DESCRIPTION DES FIGURESBRIEF DESCRIPTION OF THE FIGURES

D'autres caractéristiques et avantages de la présente invention apparaîtront à la lecture de la description qui va suivre, donnée uniquement à titre d'exemple non limitatif, et faite en référence aux dessins annexés dans lesquels :

  • la figure 1 est une vue en perspective depuis le côté fond d'une pièce d'horlogerie montrant une masse oscillante annulaire correspondant à un mode de réalisation particulier de l'invention, ainsi qu'un mobile de remontage et trois galets de roulement agencés pour coopérer avec la masse oscillante ;
  • la figure 2 est une vue en coupe selon A-A de la figure 1 ;
  • la figure 3 est une vue en coupe selon B-B de la figure 1 ;
  • les figures 4A, 4B et 4C illustrent trois modes de réalisation des éléments de liaison déformables élastiquement de masses oscillantes annulaires selon l'invention.
Other features and advantages of the present invention will appear on reading the following description, given solely by way of non-limiting example, and with reference to the appended drawings in which:
  • the figure 1 is a perspective view from the bottom side of a timepiece showing an annular oscillating mass corresponding to a particular embodiment of the invention, and a winding mobile and three rollers arranged to cooperate with the oscillating mass;
  • the figure 2 is a sectional view according to AA of the figure 1 ;
  • the figure 3 is a sectional view along BB of the figure 1 ;
  • the Figures 4A, 4B and 4C illustrate three embodiments of elastically deformable connecting elements of annular oscillating masses according to the invention.

DESCRIPTION DETAILLEE DE MODES DE REALISATIONDETAILED DESCRIPTION OF EMBODIMENTS

La figure 1 est une vue en perspective d'une masse oscillante annulaire 3 correspondant à un premier mode de réalisation de l'invention.The figure 1 is a perspective view of an annular oscillating mass 3 corresponding to a first embodiment of the invention.

La masse oscillante représentée comporte un anneau d'entraînement 5 et un secteur lourd 7. Conformément à l'invention, l'anneau d'entraînement comprend une pluralité d'éléments de liaison 9 déformables élastiquement qui s'étendent entre une partie annulaire de transmission 11 et une deuxième partie annulaire 13. Comme le montre la figure, le secteur lourd 7 est porté par et solidaire de la deuxième partie annulaire, alors que la partie annulaire de transmission présente une denture intérieure concentrique 15.The oscillating mass shown comprises a drive ring 5 and a heavy sector 7. According to the invention, the drive ring comprises a plurality of elastically deformable connecting elements 9 which extend between an annular transmission part 11 and a second annular portion 13. As shown in the figure, the heavy sector 7 is carried by and secured to the second annular portion, while the annular transmission portion has a concentric inner toothing 15.

En se référant encore à la figure 1, on peut voir que, dans mode de réalisation illustré, les éléments de liaison 9 déformables élastiquement ont la forme de tiges disposées parallèlement au plan de l'anneau d'entrainement 5. Ces tiges présentent chacune une fourche leurs donnant la forme d'un Y ayant sa partie supérieure tournée vers la deuxième partie annulaire 13. On peut noter que dans le mode de réalisation illustré, les tiges ont leur axe longitudinal orienté radialement et que les branches de la fourche s'écartent de l'axe longitudinal dans un plan parallèle à l'anneau d'entraînement et sont solidaires de la deuxième partie annulaire 13. Les tiges 9 sont flexibles de manière à ce qu'elles puissent se déformer en cas de choc. L'homme du métier comprendra que les tiges représentées sont agencées pour permettre à la deuxième partie annulaire 13 de s'écarter de sa position d'équilibre relativement à la partie annulaire de transmission 11 dans les trois directions (axiale, radiale et tangentielle).Referring again to the figure 1 it can be seen that, in the illustrated embodiment, the elastically deformable connecting elements 9 have the shape of rods arranged parallel to the plane of the driving ring 5. These rods each have a fork giving them the shape of a Y having its upper portion facing the second annular portion 13. It may be noted that in the illustrated embodiment, the rods have their longitudinal axis oriented radially and that the branches of the fork deviate from the longitudinal axis in a plane parallel to the drive ring and are integral with the second annular portion 13. The rods 9 are flexible so that they can be deformed in case of shock. Those skilled in the art will understand that the rods shown are arranged to allow the second annular portion 13 to deviate from its equilibrium position relative to the annular transmission portion 11 in the three directions (axial, radial and tangential).

La masse oscillante 3 représentée dans la figure 1 fait partie d'une pièce d'horlogerie à remontage automatique dont seul un mobile de remontage 17 et trois galets de roulement 19 sont illustrés. Comme on peut le voir sur la figure 1 et sur la vue en coupe de la figure 2, le mobile de remontage 17 comporte une la roue dentée qui engrène avec la denture intérieure 15 de l'anneau d'entraînement 5. De façon connue en soi, la fonction du mobile de remontage est de transmettre les mouvements de rotation de la masse oscillante au mécanisme de remontage (non représenté) de manière armer le ressort de barillet.The oscillating mass 3 represented in the figure 1 is part of a self-winding timepiece of which only a winding mobile 17 and three rollers 19 are illustrated. As can be seen on the figure 1 and on the sectional view of the figure 2 , the winding mobile 17 comprises a gear which meshes with the internal toothing 15 of the drive ring 5. In a manner known per se, the function of the mobile winding is to transmit the rotational movements of the oscillating mass to the winding mechanism (not shown) so as to arm the mainspring.

Les galets de roulement 19 sont de préférence équipés de roulement à billes (non représentés). La fonction des galets de roulement est de supporter et de guider la masse oscillante, de manière à ce qu'elle soit libre de tourner folle autour du cercle passant par les trois galets de roulement. En se référant plus particulièrement à la vue en coupe de la figure 3, on peut voir que la partie annulaire de transmission 11 de l'anneau d'entraînement 5 présente une rainure annulaire 21. La rainure 21 est agencée pour coopérer avec un renflement équatorial 23 que présente la circonférence des galets de roulement 19. On peut voir que le renflement 19 pénètre dans la rainure 21. On comprendra que cet arrangement assure le positionnement axial de la masse oscillante annulaire.The rollers 19 are preferably equipped with ball bearings (not shown). The function of the rollers is to support and guide the oscillating mass, so that it is free to turn crazy around the circle passing through the three rollers. Referring specifically to the sectional view of the figure 3 , it can be seen that the annular transmission portion 11 of the drive ring 5 has an annular groove 21. The groove 21 is arranged to cooperate with an equatorial bulge 23 that has the circumference of the rollers 19. It can be seen that the bulge 19 enters the groove 21. It will be understood that this arrangement ensures the axial positioning of the annular oscillating mass.

Comme on l'a déjà dit, conformément à l'invention, la masse oscillante 3 du présent exemple est prévue pour amortir les chocs. Tout d'abord, on sait bien que lorsqu'un petit objet comme une montre reçoit un choc, il subit une accélération brutale dans la direction du choc. Dans le cas qui nous intéresse, où l'objet en question est la pièce d'horlogerie du présent exemple, l'accélération brutale de la pièce d'horlogerie se transmet à la masse oscillante qu'elle contient par l'intermédiaire des galets de roulement 19. Comme l'inertie de la masse oscillante 3 est pour l'essentiel localisée dans le secteur lourd 7, ce dernier exerce une force d'inertie considérable sur le reste de la masse oscillante. Dans le cas où cette force d'inertie est orientée dans le sens radial (parallèlement au plan de l'anneau d'entraînement 5 et en direction de l'axe de rotation de la masse oscillante), elle produit un déplacement de la deuxième partie annulaire 13 relativement à la partie annulaire de transmission 11 dans le plan de l'anneau d'entrainement. On comprendra que, selon l'invention, ce déplacement est rendu possible par la déformation des éléments de liaison (dans le présent exemple, la déformation en flexion des tiges 9 ou de leur fourche), et que ce déplacement contribue à amortir le choc, et en particulier à protéger les roulements à billes des galets 19.As has already been said, according to the invention, the oscillating mass 3 of the present example is designed to dampen shocks. First of all, we know that when a small object like a watch receives a shock, it undergoes a sudden acceleration in the direction of the shock. In the case that concerns us, where the object in question is the timepiece of the present example, the sudden acceleration of the timepiece is transmitted to the oscillating weight that it contains by means of the rollers of As the inertia of the oscillating mass 3 is essentially located in the heavy sector 7, the latter exerts a considerable force of inertia on the rest of the oscillating mass. In the case where this inertial force is oriented in the radial direction (parallel to the plane of the drive ring 5 and towards the axis of rotation of the oscillating mass), it produces a displacement of the second part. annular 13 relative to the annular transmission portion 11 in the plane of the drive ring. It will be understood that, according to the invention, this displacement is made possible by the deformation of the connecting elements (in this example, the bending deformation of the rods 9 or their fork), and that this displacement contributes to damping the shock, and in particular to protect the ball bearings of the rollers 19.

Dans le cas où la force d'inertie exercée par le secteur lourd 7 est orientée en direction tangentielle (dans une direction tangente à l'anneau d'entraînement 5 et parallèle au plan de cet anneau), la force d'inertie tend à faire tourner brusquement la deuxième partie annulaire 13 de l'anneau d'entraînement 5. On comprendra que, selon l'invention, ce mouvement brusque peut être amorti grâce à la déformation en flexion des tiges 9. Les tiges flexibles permettent d'éviter que le couple exercé par la denture intérieure 15 sur le mobile de remontage ne dépasse une valeur admissible. On peut ainsi éviter toute casse du mécanisme de remontage automatique.In the case where the inertial force exerted by the heavy sector 7 is oriented tangentially (in a direction tangent to the drive ring 5 and parallel to the plane of this ring), the inertial force tends to make turn abruptly the second annular portion 13 of the drive ring 5. It will be understood that, according to the invention, this sudden movement can be damped thanks to the bending deformation of the rods 9. The flexible rods make it possible to prevent the torque exerted by the internal toothing 15 on the winding wheel does not exceed a permissible value. We can thus avoid any breakage of the automatic winding mechanism.

On a vu que les galets de roulement 19 sont agencés pour maintenir la masse oscillante 3 non seulement radialement, mais également axialement grâce à la coopération entre le renflement équatorial 23 et la rainure 21. Les galets de roulement transmettent donc également à la masse oscillante l'accélération due à un choc axial exercé côté fond ou côté cadran de la pièce d'horlogerie. Dans ce cas, le secteur lourd exerce une force d'inertie considérable dans le sens axial (perpendiculairement au plan de l'anneau d'entraînement) sur le reste de la masse oscillante. Cette force produit un déplacement de la deuxième partie annulaire 13 relativement à la partie annulaire de transmission 11. Ce déplacement est orienté perpendiculairement au plan de l'anneau d'entrainement 5. On comprendra que comme précédemment, ce déplacement est rendu possible par la flexion des tiges 9, et que ce déplacement protège les galets de roulement et le mobile de remontage en amortissant le choc subi par la pièce d'horlogerie.We have seen that the rollers 19 are arranged to maintain the oscillating mass 3 not only radially, but also axially through the cooperation between the equatorial bulge 23 and the groove 21. The rollers also transmit to the oscillating weight l acceleration due to an axial impact exerted on the bottom or dial side of the timepiece. In this case, the heavy sector exerts a considerable inertial force in the axial direction (perpendicular to the plane of the drive ring) on the rest of the oscillating mass. This force produces a displacement of the second annular portion 13 relative to the annular transmission portion 11. This displacement is oriented perpendicular to the plane of the drive ring 5. It will be understood that as before, this displacement is made possible by the flexion rods 9, and that this movement protects the rollers and the winding mobile by damping the shock suffered by the timepiece.

Les figures 4A, 4B et 4C illustrent schématiquement trois modes de réalisation des éléments de liaison déformables élastiquement. Le mode de réalisation illustré dans la figure 4A correspond à celui de l'exemple qui vient d'être décrit. Les figures 4B et 4C illustrent deux autres modes de réalisation dans lesquels les éléments de liaison sont également constitués par des tiges flexibles agencées pour se déformer élastiquement. En se référant maintenant à la figure 4B, on peut voir que les tiges flexibles représentées (référencées 29) comportent chacune un milieu, une extrémité intérieure et une extrémité extérieure. On peut voir que les tiges flexibles se partagent en deux de part et d'autre du milieu en direction de chacune des extrémités. Cette caractéristique donne aux tiges la forme d'un double Y. De préférence, les deux fourches du double Y sont comprises chacune dans un plan parallèle à l'anneau d'entraînement 5. Enfin, on peut voir que les tiges flexibles 39 du mode de réalisation de la figure 4C ont un axe longitudinal qui n'est pas orienté dans le sens radial mais qu'elles forment un angle non nul avec le rayon au centre de la deuxième partie annulaire 13 passant par le point d'attache dudit rayon.The Figures 4A, 4B and 4C schematically illustrate three embodiments of elastically deformable connecting elements. The embodiment illustrated in the Figure 4A corresponds to that of the example just described. The Figures 4B and 4C illustrate two other embodiments in which the connecting elements are also constituted by flexible rods arranged to deform elastically. Referring now to the Figure 4B , we can see that the flexible rods represented (referenced 29) each comprise a middle, an inner end and an outer end. It can be seen that the flexible rods are divided in two on either side of the middle towards each of the ends. This characteristic gives the rods the shape of a double Y. Preferably, the two forks of the double Y are each included in a plane parallel to the drive ring 5. Finally, it can be seen that the flexible rods 39 of the realization of the figure 4C have a longitudinal axis which is not oriented in the radial direction but which form a non-zero angle with the radius in the center of the second annular portion 13 passing through the point of attachment of said radius.

On comprendra en outre que diverses modifications et/ou améliorations évidentes pour un homme du métier peuvent être apportées aux modes de réalisation qui font l'objet de la présente description sans sortir du cadre de la présente invention définie par les revendications annexées. En particulier, plutôt que d'être arrangée autour de la partie annulaire de transmission, selon une variante, la deuxième partie annulaire pourrait être disposée concentriquement à l'intérieur de la partie annulaire de transmission. D'autre part, les éléments de liaison déformables élastiquement ne sont pas nécessairement constitués par des tiges flexibles. En effet, ces éléments de liaison pourraient alternativement être constitués par des bascules (au nombre de trois ou plus) associées chacune à un ressort.It will be further understood that various modifications and / or improvements obvious to those skilled in the art can be made to the embodiments which are the subject of the present description without departing from the scope of the present invention defined by the appended claims. In particular, rather than being arranged around the annular transmission portion, alternatively, the second annular portion could be concentrically disposed within the annular transmission portion. On the other hand, the elastically deformable connecting elements are not necessarily constituted by flexible rods. Indeed, these connecting elements could alternatively be constituted by flip-flops (three or more) each associated with a spring.

L'anneau d'entrainement de l'invention peut être est formé à base d'un matériau comportant du silicium, c'est-à-dire, par exemple, du silicium monocristallin, du silicium polycristallin, du silicium monocristallin dopé, du silicium polycristallin dopé, du carbure de silicium dopé ou non, du nitrure de silicium dopé ou non, de l'oxyde de silicium dopé ou non tel que le quartz ou de la silice. Le gravage anisotrope de tels matériaux peut être réalisé par voie humide ou par voie sèche et typiquement par une attaque anisotrope du type gravage ionique réactif profond également connu sous l'abréviation D.R.I.E. provenant des termes anglais « Deep Reactive Ion Etching ».The drive ring of the invention may be formed of a material comprising silicon, that is to say, for example, monocrystalline silicon, polycrystalline silicon, doped silicon monocrystalline, silicon doped polycrystalline doped silicon carbide or not doped or doped silicon nitride doped or non-doped silicon oxide such as quartz or silica. The anisotropic etching of such materials can be carried out wet or dry and typically by an anisotropic attack of the deep reactive ion etching type also known by the abbreviation DRIE from the English term "Deep Reactive Ion Etching".

Alternativement, l'anneau d'entrainement de l'invention peut être est formé en métal précieux ou non, typiquement par la technique électroformage connue sous l'abréviation L.I.G.A. provenant des termes allemands « RöntgenLithographie, Galvanoformung & Abformung » et dans laquelle on remplit un moule à un ou plusieurs niveaux à l'aide d'un métal, par exemple, à l'aide d'une galvanoplastie. Bien entendu, tout type d'électroformage, du type L.I.G.A. ou non, capable de former un anneau d'entrainement monobloc à un ou plusieurs niveaux est envisageable.Alternatively, the drive ring of the invention may be formed of precious metal or not, typically by the electroforming technique known by the abbreviation L.I.G.A. from the German terms "RöntgenLithographie, Galvanoformung & Abformung" and in which a mold is filled at one or more levels with the aid of a metal, for example, by electroplating. Of course, any type of electroforming, type L.I.G.A. or not, able to form a monoblock training ring at one or more levels is possible.

Claims (11)

Masse oscillante annulaire (3) pour pièce d'horlogerie à remontage automatique comportant un anneau d'entraînement (5) comprenant une partie annulaire de transmission (11) munie d'une denture coaxiale (15) pour entraîner le remontage de la pièce d'horlogerie, et comportant un secteur lourd (7) fixé à l'anneau d'entraînement ; caractérisée en ce que l'anneau d'entraînement (5) comprend en outre une pluralité d'éléments de liaison (9) déformables élastiquement, le secteur lourd (7) étant relié à la partie annulaire de transmission (11) via les éléments de liaison.An oscillating oscillating mass (3) for self-winding timepieces comprising a drive ring (5) comprising an annular transmission part (11) provided with a coaxial toothing (15) for driving the reassembly of the workpiece. watchmaking, and having a heavy sector (7) attached to the drive ring; characterized in that the drive ring (5) further comprises a plurality of resiliently deformable connecting elements (9), the heavy sector (7) being connected to the annular transmission part (11) via the connecting elements (9). link. Masse oscillante annulaire selon la revendication 1, dans laquelle les éléments de liaison (9) déformables sont constitués par des tiges flexibles (9 ; 29 ; 39) agencées pour se déformer élastiquement.An oscillating annular mass according to claim 1, wherein the deformable connecting elements (9) consist of flexible rods (9; 29; 39) arranged to deform elastically. Masse oscillante annulaire selon la revendication 2, dans laquelle les tiges flexibles (9 ; 29 ; 39) ont chacune un axe longitudinal, les axes longitudinaux s'étendant dans un plan coplanaire à l'anneau d'entraînement (5).An oscillating annular mass according to claim 2, wherein the flexible rods (9; 29; 39) each have a longitudinal axis, the longitudinal axes extending in a plane coplanar with the drive ring (5). Masse oscillante annulaire selon la revendication 3, dans laquelle les tiges flexibles (9) comportent une fourche leurs donnant sensiblement la forme d'un Y, la fourche étant comprises dans le plan coplanaire à l'anneau d'entraînement (5).An oscillating oscillating mass according to claim 3, wherein the flexible rods (9) comprise a fork giving them substantially the shape of a Y, the fork being included in the plane coplanar with the drive ring (5). Masse oscillante annulaire selon la revendication 3, dans laquelle les tiges flexibles (29) comportent chacune un milieu, une extrémité intérieure et une extrémité extérieure, les tiges flexibles se partageant en deux de part et d'autre du milieu en direction de chacune des dites extrémités, les tiges flexibles présentant sensiblement la forme d'un double Y, le double Y comportant deux fourches opposées et comprises chacune dans le plan coplanaire à l'anneau d'entraînement (5).An oscillating oscillating mass according to claim 3, wherein the flexible rods (29) each comprise a middle, an inner end and an outer end, the flexible rods dividing in two on either side of the middle towards each of said ends, the flexible rods having substantially the shape of a double Y, the double Y having two opposite forks and each included in the coplanar plane to the drive ring (5). Masse oscillante annulaire selon l'une des revendications 3, 4 et 5, dans laquelle, en l'absence de contraintes extérieures, l'axe longitudinal des tiges flexibles (9 ; 29) est orienté radialement.An oscillating oscillating mass according to one of claims 3, 4 and 5, wherein, in the absence of external stresses, the longitudinal axis of the flexible rods (9; 29) is oriented radially. Masse oscillante annulaire selon l'une des revendications 3, 4 et 5, dans laquelle l'axe longitudinal des tiges flexibles (39) en non-radial.Annular oscillating mass according to one of claims 3, 4 and 5, wherein the longitudinal axis of the flexible rods (39) non-radial. Masse oscillante annulaire selon l'une des revendications 2 à 7, dans laquelle l'anneau d'entraînement comprend une deuxième partie annulaire (13) concentrique à la partie annulaire de transmission (11), les tiges flexibles (9 ; 29 ; 39) venant de matière avec la partie annulaire de transmission (11) et avec la deuxième partie annulaire (13), et le secteur lourd (7) étant fixé à la deuxième partie annulaire.An oscillating mass according to one of claims 2 to 7, wherein the drive ring comprises a second annular portion (13) concentric with the annular transmission portion (11), the flexible rods (9; 29; 39). integrally with the annular transmission portion (11) and the second annular portion (13), and the heavy sector (7) being attached to the second annular portion. Masse oscillante annulaire selon la revendication 8, dans laquelle, en l'absence de contraintes extérieures, la deuxième partie annulaire (13) s'étend concentriquement autour de la partie annulaire de transmission (11) et dans un même plan que la partie annulaire de transmission.An oscillating oscillating mass according to claim 8, wherein, in the absence of external stresses, the second annular portion (13) extends concentrically around the annular transmission portion (11) and in a plane with the annular portion of transmission. Mouvement d'horlogerie à remontage automatique comprenant une masse oscillante (3) selon l'une des revendications 1 à 9, et un mécanisme de remontage automatique comprenant un mobile de remontage (17) agencé pour engrener avec la denture coaxiale (15), et au moins trois galets de roulement (19) montés pivotant sur un élément fixe de la pièce d'horlogerie, les galets de roulement étant agencés pour coopérer avec la partie annulaire de transmission (11) de l'anneau d'entraînement (5) de sorte que la masse oscillante (3) soit libre de tourner, suspendue et guidée par les galets de roulement.A self-winding watch movement comprising an oscillating weight (3) according to one of claims 1 to 9, and an automatic winding mechanism comprising a winding mobile (17) arranged to mesh with the coaxial toothing (15), and at least three rollers (19) pivotally mounted on a fixed element of the timepiece, the rollers being arranged to cooperate with the annular transmission portion (11) of the drive ring (5). so that the oscillating weight (3) is free to rotate, suspended and guided by the rollers. Pièce d'horlogerie à remontage automatique, comprenant un mouvement d'horlogerie selon la revendication 10.Timepiece with automatic winding, comprising a clockwork movement according to claim 10.
EP14193348.1A 2014-11-14 2014-11-14 Annular oscillating mass and timepiece comprising such an oscillating mass Active EP3021173B1 (en)

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EP14193348.1A EP3021173B1 (en) 2014-11-14 2014-11-14 Annular oscillating mass and timepiece comprising such an oscillating mass
US14/930,746 US9557712B2 (en) 2014-11-14 2015-11-03 Annular oscillating weight and timepiece comprising such an oscillating weight
JP2015221854A JP6293719B2 (en) 2014-11-14 2015-11-12 Annular vibratory weight and timepiece having such vibratory weight
RU2015148885A RU2620489C2 (en) 2014-11-14 2015-11-13 Annular swinging weight and clock containing such swinging weight
CN201510781705.6A CN105607455B (en) 2014-11-14 2015-11-13 Annular automatic pendulum and the clock and watch for including the automatic pendulum
JP2017177404A JP6381758B2 (en) 2014-11-14 2017-09-15 Annular vibratory weight and timepiece having such vibratory weight

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CH701343B1 (en) 2008-02-22 2011-01-14 Bucherer Montres S A Self-winding mechanism for a watch and clock with such a lift mechanism.
EP2110719A1 (en) * 2008-04-15 2009-10-21 Montres Jaquet Droz SA Shock absorber for an oscillating mass

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3964896A1 (en) * 2020-09-08 2022-03-09 Blancpain SA Mechanism for self-winding of a watch with oscillating weight

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EP3021173B1 (en) 2017-05-24
JP6293719B2 (en) 2018-03-14
JP2016095306A (en) 2016-05-26
JP6381758B2 (en) 2018-08-29
RU2015148885A (en) 2017-05-19
US9557712B2 (en) 2017-01-31
CN105607455A (en) 2016-05-25
RU2620489C2 (en) 2017-05-25
JP2018010010A (en) 2018-01-18
US20160139563A1 (en) 2016-05-19
CN105607455B (en) 2018-04-03

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