EP1860511B1 - Timepiece movement comprising a mobile bridge - Google Patents

Timepiece movement comprising a mobile bridge Download PDF

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Publication number
EP1860511B1
EP1860511B1 EP06114358A EP06114358A EP1860511B1 EP 1860511 B1 EP1860511 B1 EP 1860511B1 EP 06114358 A EP06114358 A EP 06114358A EP 06114358 A EP06114358 A EP 06114358A EP 1860511 B1 EP1860511 B1 EP 1860511B1
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EP
European Patent Office
Prior art keywords
bridge
plate
movement according
movement
organ
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EP06114358A
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German (de)
French (fr)
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EP1860511A1 (en
Inventor
Christophe Claret
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MANUFACTURE CLARET SA
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Manufacture Claret SA
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Priority to EP06114358A priority Critical patent/EP1860511B1/en
Priority to AT06114358T priority patent/ATE555427T1/en
Publication of EP1860511A1 publication Critical patent/EP1860511A1/en
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Publication of EP1860511B1 publication Critical patent/EP1860511B1/en
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    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B29/00—Frameworks
    • G04B29/02—Plates; Bridges; Cocks
    • G04B29/022—Bridges
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B15/00—Escapements
    • G04B15/06—Free escapements
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B31/00—Bearings; Point suspensions or counter-point suspensions; Pivot bearings; Single parts therefor
    • G04B31/02—Shock-damping bearings
    • 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

Definitions

  • the present invention relates to the field of watchmaking. It relates more particularly to a timepiece movement comprising a movable bridge.
  • the essential principle is to mount elastically in their housing the stones used for the pivoting of the mobiles.
  • the meshing of the various elements of the exhaust mechanism can hardly withstand the positioning differences caused by the shocks.
  • the escapement exhaust systems are very sensitive to shocks, especially lateral.
  • a detent escapement is shown on the figure 1 . It comprises, in a conventional manner an escape wheel 10 kinematically connected to the barrel, and a detent 12.
  • a double plate 14 carries a pulse pallet 16 cooperating with the escape wheel 10 and a release pallet 18 working with the 12 end thereof has a bend, carrying a pallet 20, on which can come to rest the wheel 1.
  • springs 22 and 24 can maintain the different supports. A side impact may disengage the pallet rest 20, causing the runaway mechanism.
  • the present invention provides a device for reducing the influence of shocks, particularly lateral shocks on an exhaust, including expansion.
  • the invention relates to a mechanical timepiece movement comprising a plate, an energy source, a regulating member, an escapement mechanism, and a finishing train formed of a train of several wheels. kinematically connecting the power source and the exhaust mechanism.
  • the movement comprises a bridge pivoted elastically relative to the plate around a first axis.
  • This bridge carries the regulating member, the exhaust and a first part of the finishing train, a second part of the finishing train being fixedly mounted relative to the plate.
  • a wheel of the finishing train whose pivot axis is coincident with the first axis, provides the connection between these two parts.
  • the bridge is pivotally mounted about the axis of the second wheel.
  • the movable bridge is secured to a pivot member on which pivots the wheel of the work train ensuring the connection between the first and second parts of the work train.
  • This pivot member pivots in the platen by means of a ball bearing.
  • the bridge further comprises a damping system cooperating with the plate.
  • the damping system is arranged to damp the pivoting movements of the bridge.
  • the damping system comprises a shaft integral with the bridge, a first end of which takes place in a housing formed in the plate. This accommodation is slightly more large than this first end so as to define a space, an elastic member being disposed at this first end and occupying at least partially said space.
  • the shaft defines an additional housing located at the interface between the plate and the movable bridge.
  • a second elastic member is disposed in this additional housing so as to allow sliding of the bridge on the plate.
  • the exhaust is disposed on a first bridge 28 disposed on the plate 26 and which carries, in addition, a regulating member 30.
  • the escapement shown is a detent escapement, of the type of the one presented in the introduction above.
  • the figure 2 shows an escape wheel 10, a trigger 12 carrying a pallet 20 cooperating with the escape wheel 10.
  • the regulating member 30 is a spiral balance, carrying, in a conventional manner, a double plate 14 provided with pallets clearance and pulse not visible, respectively acting on the trigger 12 and on the escape wheel 10.
  • the figure 2 also allows to see some elements of the finishing train which is formed of a train of several wheels, including an escape pinion, coaxial with the escape wheel, a second wheel 32 and an average wheel 34 connecting kinematically the energy source and the exhaust mechanism.
  • the second wheel is the wheel that meshes with the exhaust pinion and that, as its name indicates, usually performs a lap in one minute. However, depending on the chosen exhaust speed of rotation of this wheel may be different without calling into question the denomination used by those skilled in the art.
  • a first part of the finishing gear namely the escape pinion and the second wheel, is disposed on the deck 28.
  • the second wheel 32 is mounted on the deck 28, as it will be exposed in detail below.
  • a second part of the finishing gear is mounted on the plate 26 or on another fixed bridge relative to the plate. We thus see on the figure 2 a portion of the average wheel 34 driven by the second wheel 32 via a not visible second gear.
  • the figure 2 further represents a second bridge 36 whose utility will appear later.
  • the figure 3 shows the bridge 28 without the regulator member or the exhaust. Only the pivot points A of the regulating member 30, B of the trigger 12, C of the escape wheel 10 and D of the second wheel 32 are shown.
  • the arrow F1 represents the direction of the lateral impacts which may be particularly detrimental to the operation of a detent escapement.
  • the bridge 28 is mounted mobile about the point D and can rotate in a direction represented by the arrow F2 by means of a pivoting system illustrated on the figure 4 and connecting the movable bridge 28 to the plate 26.
  • the pivoting system can be provided by the following construction.
  • the movable bridge 28 is secured to a barrel 38 passing through the plate and whose first end 38a carries a stone 40 on which the wheel of second 32.
  • a pivoting member 42 such as a ball bearing is fitted on the barrel 38. This pivot member takes place without play in a housing 44 formed in the plate 26.
  • the pivot member 42 thus ensures interface between the barrel 38 (and therefore the movable bridge 28) and the plate 26.
  • a locking element 46 in this case a nut screwed to a second end 38b of the barrel 38, keeps the bearing in position on the platinum.
  • the bearing used is a bearing with four contact points so as to eliminate any break between the plate 26 and the movable bridge 28. Especially the axial displacements of the bridge, harmful to its pivoting, are avoided.
  • a damping system 48 ensures, on the one hand, the limitation of the movement of the bridge 28 and, on the other hand, an elastic return of this bridge to a rest position chosen by those skilled in the art so as to have it easily with respect to the entire movement.
  • the damping system 48 comprises a shaft 50 secured to the movable bridge 28 and provided with a wider portion 50a resting on the bridge 28. This portion 50a is provided with openings 51 for fixing the shaft on the bridge, for example by pins.
  • a first end 50b of the shaft takes place in a second housing 52 formed in the plate.
  • This dwelling 52 is slightly more large than the end 50b so as to define a space 54 between the shaft and the plate.
  • An elastic member 56 is disposed at the end 50b, possibly in a recess that includes the shaft, and occupies at least partially the space 54.
  • the dimensional ratios of the elastic member 56 and the housing 52 are adapted from in order to be able to arrange the member 56 with a slight prestress in the housing 52.
  • the elastic member 56 is toroidal in shape and is made of an elastically deformable material, of the rubber type.
  • the housing 52 may be of a size greater than the external dimension of the elastic member 56 and comprise, on either side, on the axis of displacement of the bridge 28, two protuberances 58 projecting, to constrain the elastic member 56.
  • the contact between the plate 26 and the elastic member 56 is limited to the two zones defined by the protuberances 58. In this way, the deformation of the elastic member 56 in the direction of movement of the bridge 28 is favored.
  • the shaft 50 has a groove 62 defining an additional housing located at the interface between the plate 26 and the movable bridge 28.
  • a second elastic member 64 is disposed in this groove so as to allow the sliding bridge to slide on platinum.
  • the second elastic member 64 is dimensioned with respect to the groove 62 so that the bridge 28 is not in direct contact with the plate 26.
  • the second bridge 36 mentioned above is disposed above a second end 50c of the shaft, that is to say on the opposite side to the plate.
  • the bridge 36 can be fixed on the plate and then passes through the movable bridge 28 in an oblong opening 65, allowing not to hinder the movement of the bridge 28.
  • a third resilient member 66 is disposed at the second end 50c. This third elastic member cooperates with the bridge 36 so as to axially maintain the shaft 50 and to damp the axial shocks.
  • this bridge 36 makes it possible to hide the damping system on the side of the dial. During the movements of the movable bridge 28, the third elastic member 66 slips against the bridge 36.
  • the elastic members 56, 64 and 66 are made of nitrile, because this material is particularly adapted to the intended application by allowing, on the one hand, a smooth movement of the movable bridge 28 with respect to the plate 26 and the second bridge 36 and, secondly, a damping proportional to the compression exerted.
  • Different types of rubber, silicone or various polymers may also be suitable, depending on the size chosen for these organs.
  • a mechanical timepiece movement whose regulating member, the exhaust and part of the work train are arranged on a bridge 28 pivoted on the plate 26.
  • the pivot point of the bridge 28 is arranged so that the shocks most prejudicial to the operation of the movement, and more particularly of the exhaust, cause the displacement of the bridge.
  • a damping system 48 makes it possible to dissipate part of the energy due to the shock and to reduce the negative consequences on the movement. In the case of a detent escapement as illustrated in the present description, the risk of disengagement of the pallet rest is greatly reduced.
  • the example described above has been given by way of non-limiting illustration.
  • the skilled person may choose various forms for the elastic members.
  • elastomeric pads can replace the toroidal organs.
  • the shaft 50 may also consist of a simple cylinder made of a relatively rigid but elastically deformable material or a metal cylinder covered with a layer of an elastic material.
  • the shaft may not be fixed to the bridge but simply secured by being mounted fat in the bridge 28.
  • these resilient members can dampen the movements of the movable bridge.
  • it is not necessary that the third elastic member has particular sliding qualities.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Micromachines (AREA)
  • Axle Suspensions And Sidecars For Cycles (AREA)
  • Vibration Dampers (AREA)

Abstract

The movement has a bridge (28) elastically pivoted with respect to a plate (26) around an axis. The bridge supports a regulator unit (30), an escapement and a part of a finishing gear train. Another part of the gear train is mounted fixed with respect to the plate. A finishing gear train wheel has a pivoting axis that is merged with the axis, for providing a connection between the parts of the gear train. The bridge is integrated around a pivot element on which the wheel pivots. The bridge has a damping system comprising an elastic unit placed at an end of a shaft of the system.

Description

Domaine techniqueTechnical area

La présente invention se rapporte au domaine de l'horlogerie. Elle concerne, plus particulièrement, un mouvement de pièce d'horlogerie comportant un pont mobile.The present invention relates to the field of watchmaking. It relates more particularly to a timepiece movement comprising a movable bridge.

Etat de la techniqueState of the art

Lorsqu'ils sont utilisés dans une montre, les mouvements d'horlogerie mécaniques supportent mal, comme tous les mécanismes de précision, les chocs occasionnés lors du porter. En effet, les pivots de certains rouages sont très fragiles et peuvent être cassés en cas de chocs.When used in a watch, the mechanical clockwork movements do not support, like all the mechanisms of precision, the shocks caused during the wearing. Indeed, the pivots of some wheels are very fragile and can be broken in case of shocks.

Pour pallier ce problème, divers systèmes antichoc ont été proposés. Le principe essentiel est de monter élastiquement dans leur logement les pierres utilisées pour le pivotement des mobiles.To overcome this problem, various anti-shock systems have been proposed. The essential principle is to mount elastically in their housing the stones used for the pivoting of the mobiles.

Toutefois de tels systèmes ne conviennent pas à tous les éléments des mécanismes. De plus, même s'ils sont performants pour les chocs axiaux, ils se révèlent nettement moins intéressants dans le cas de chocs latéraux, notamment à cause du déplacement de l'axe de pivotement du mobile, qui peut entraîner un dysfonctionnement du mécanisme.However, such systems are not suitable for all elements of the mechanisms. Moreover, even if they are efficient for axial shocks, they are much less interesting in the case of side impacts, in particular because of the displacement of the pivot axis of the mobile, which can cause a malfunction of the mechanism.

Par exemple, l'engrènement des différents éléments du mécanisme d'échappement peut difficilement supporter les écarts de positionnement occasionnés par les chocs. Plus particulièrement, les systèmes d'échappement à détente sont très sensibles aux chocs, notamment latéraux.For example, the meshing of the various elements of the exhaust mechanism can hardly withstand the positioning differences caused by the shocks. More particularly, the escapement exhaust systems are very sensitive to shocks, especially lateral.

Un échappement à détente est représenté sur la figure 1. Il comprend, de manière classique une roue d'échappement 10 reliée cinématiquement au barillet, et une détente 12. Un double plateau 14 porte une palette d'impulsion 16 coopérant avec la roue d'échappement 10 et une palette de dégagement 18 travaillant avec l'extrémité de la détente 12. Celle-ci présente un coude, portant une palette de repos 20, sur laquelle peut venir s'appuyer la roue 1. Des ressorts 22 et 24 permettent de maintenir les différents appuis. Un choc latéral risque de désengager la palette de repos 20, ce qui provoque l'emballement du mécanisme.A detent escapement is shown on the figure 1 . It comprises, in a conventional manner an escape wheel 10 kinematically connected to the barrel, and a detent 12. A double plate 14 carries a pulse pallet 16 cooperating with the escape wheel 10 and a release pallet 18 working with the 12 end thereof has a bend, carrying a pallet 20, on which can come to rest the wheel 1. springs 22 and 24 can maintain the different supports. A side impact may disengage the pallet rest 20, causing the runaway mechanism.

Une autre variante est représentée par le document US 451630 .Another variant is represented by the document US 451630 .

A cause de cet inconvénient, notamment, et malgré un excellent rendement mécanique, ce type d'échappement est particulièrement délicat à adapter dans une montre bracelet et les systèmes antichocs de l'état de la technique ne permettent de résoudre ce problème de manière satisfaisante.Because of this disadvantage, in particular, and despite excellent mechanical performance, this type of exhaust is particularly difficult to adapt in a wristwatch and anti-shock systems of the state of the art can solve this problem satisfactorily.

La présente invention propose un dispositif permettant de diminuer l'influence des chocs, particulièrement des chocs latéraux sur un échappement, notamment à détente.The present invention provides a device for reducing the influence of shocks, particularly lateral shocks on an exhaust, including expansion.

Divulgation de l'inventionDisclosure of the invention

De façon plus précise, l'invention concerne un mouvement de pièce d'horlogerie mécanique comprenant une platine, une source d'énergie, un organe régulateur, un mécanisme d'échappement, et un rouage de finissage formé d'un train de plusieurs roues reliant cinématiquement la source d'énergie et le mécanisme d'échappement.More specifically, the invention relates to a mechanical timepiece movement comprising a plate, an energy source, a regulating member, an escapement mechanism, and a finishing train formed of a train of several wheels. kinematically connecting the power source and the exhaust mechanism.

Selon l'invention, le mouvement comprend un pont pivoté élastiquement par rapport à la platine autour d'un premier axe. Ce pont porte l'organe régulateur, l'échappement et une première partie du rouage de finissage, une deuxième partie du rouage de finissage étant montée fixe par rapport à la platine. Une roue du rouage de finissage dont l'axe de pivotement est confondu avec le premier axe, assure la liaison entre ces deux parties.According to the invention, the movement comprises a bridge pivoted elastically relative to the plate around a first axis. This bridge carries the regulating member, the exhaust and a first part of the finishing train, a second part of the finishing train being fixedly mounted relative to the plate. A wheel of the finishing train whose pivot axis is coincident with the first axis, provides the connection between these two parts.

Selon un mode de réalisation préféré dans lequel le rouage de finissage comprend une roue de seconde, le pont est monté pivotant autour de l'axe de cette roue de seconde.According to a preferred embodiment wherein the finishing gear comprises a second wheel, the bridge is pivotally mounted about the axis of the second wheel.

De manière avantageuse, le pont mobile est solidaire d'un élément de pivot sur lequel pivote la roue du rouage de finissage assurant la liaison entre les première et deuxième parties du rouage de finissage. Cet élément de pivot pivote dans la platine au moyen d'un roulement à billes.Advantageously, the movable bridge is secured to a pivot member on which pivots the wheel of the work train ensuring the connection between the first and second parts of the work train. This pivot member pivots in the platen by means of a ball bearing.

Selon un autre aspect de la présente invention, le pont comporte, en outre, un système d'amortissement coopérant avec la platine. Le système d'amortissement est agencé de manière à amortir les mouvements de pivotement du pont.According to another aspect of the present invention, the bridge further comprises a damping system cooperating with the plate. The damping system is arranged to damp the pivoting movements of the bridge.

Selon un mode de réalisation avantageux, le système d'amortissement comporte un arbre solidaire du pont dont une première extrémité prend place dans un logement ménagé dans la platine. Ce logement est légèrement plus grand que cette première extrémité de manière à définir un espace, un organe élastique étant disposé au niveau de cette première extrémité et occupant au moins partiellement ledit espace.According to an advantageous embodiment, the damping system comprises a shaft integral with the bridge, a first end of which takes place in a housing formed in the plate. This accommodation is slightly more large than this first end so as to define a space, an elastic member being disposed at this first end and occupying at least partially said space.

De plus, l'arbre définit un logement supplémentaire situé à l'interface entre la platine et le pont mobile. Un deuxième organe élastique est disposé dans ce logement supplémentaire de manière à permettre le glissement du pont sur la platine. Brève description des dessinsIn addition, the shaft defines an additional housing located at the interface between the plate and the movable bridge. A second elastic member is disposed in this additional housing so as to allow sliding of the bridge on the plate. Brief description of the drawings

D'autres détails apparaîtront plus clairement à la lecture de la description qui suit, faite en référence au dessin annexé dans lequel:

  • la figure 2 est une vue de dessus d'un échappement à détente d'un mouvement selon l'invention,
  • la figure 3a est une vue de dessus simplifiée du pont pivoté élastiquement, tandis que la figure 3b représente en vue agrandie une partie du système d'amortissement,
  • les figures 4 et 5 sont des vues en coupe, respectivement des systèmes d'amortissement et de pivotement du pont.
Other details will appear more clearly on reading the description which follows, made with reference to the appended drawing in which:
  • the figure 2 is a top view of a detent escapement of a movement according to the invention,
  • the figure 3a is a simplified top view of the elastically pivoted bridge, while the figure 3b represents in enlarged view part of the damping system,
  • the Figures 4 and 5 are sectional views respectively of the damping and pivoting systems of the bridge.

Mode(s) de réalisation de l'inventionMode (s) of realization of the invention

On a représenté sur la figure 2 l'échappement d'un mouvement de montre. Ce mouvement comprend une source d'énergie ne figurant pas sur le dessin et est monté sur une platine 26 mieux visible sur les figures 4 et 5. Dans un but de clarification, les éléments courants du mouvement sans rapport avec l'invention n'ont pas été représentés sur les figures.We have shown on the figure 2 the escape of a watch movement. This movement comprises a power source not shown in the drawing and is mounted on a plate 26 which is better visible on the Figures 4 and 5 . For purposes of clarification, the current elements of the movement unrelated to the invention have not been shown in the figures.

L'échappement est disposé sur un premier pont 28 disposé sur la platine 26 et qui porte, en outre, un organe régulateur 30. A titre d'exemple, l'échappement représenté est un échappement à détente, du type de celui qui est présenté dans l'introduction ci-dessus. La figure 2 montre une roue d'échappement 10, une détente 12 portant une palette de repos 20 coopérant avec la roue d'échappement 10. L'organe régulateur 30 est un balancier spiral, portant, de manière classique, un double plateau 14 muni des palettes de dégagement et d'impulsion non visibles, agissant respectivement sur la détente 12 et sur la roue d'échappement 10.The exhaust is disposed on a first bridge 28 disposed on the plate 26 and which carries, in addition, a regulating member 30. By way of example, the escapement shown is a detent escapement, of the type of the one presented in the introduction above. The figure 2 shows an escape wheel 10, a trigger 12 carrying a pallet 20 cooperating with the escape wheel 10. The regulating member 30 is a spiral balance, carrying, in a conventional manner, a double plate 14 provided with pallets clearance and pulse not visible, respectively acting on the trigger 12 and on the escape wheel 10.

La figure 2 permet en outre de voir certains éléments du rouage de finissage qui est formé d'un train de plusieurs roues, dont un pignon d'échappement, coaxiale avec la roue d'échappement, une roue de seconde 32 et une roue de moyenne 34 reliant cinématiquement la source d'énergie et le mécanisme d'échappement.The figure 2 also allows to see some elements of the finishing train which is formed of a train of several wheels, including an escape pinion, coaxial with the escape wheel, a second wheel 32 and an average wheel 34 connecting kinematically the energy source and the exhaust mechanism.

La roue de seconde est la roue qui engrène avec le pignon d'échappement et qui, comme l'indique son nom, effectue généralement un tour en une minute. Toutefois, en fonction de l'échappement choisi sa vitesse de rotation de cette roue peut être différente, sans remettre en cause la dénomination utilisée par l'homme du métier.The second wheel is the wheel that meshes with the exhaust pinion and that, as its name indicates, usually performs a lap in one minute. However, depending on the chosen exhaust speed of rotation of this wheel may be different without calling into question the denomination used by those skilled in the art.

Une première partie du rouage de finissage, à savoir le pignon d'échappement et la roue de seconde, est disposée sur le pont 28. Selon l'exemple illustré, la roue de seconde 32 est montée sur le pont 28, comme il sera exposé en détail ci-après. Une deuxième partie du rouage de finissage est monté sur la platine 26 ou sur un autre pont fixe par rapport à la platine. On aperçoit ainsi sur la figure 2 une portion de la roue de moyenne 34 entraînée par la roue de seconde 32 par l'intermédiaire d'un pignon de seconde non visible.A first part of the finishing gear, namely the escape pinion and the second wheel, is disposed on the deck 28. According to the illustrated example, the second wheel 32 is mounted on the deck 28, as it will be exposed in detail below. A second part of the finishing gear is mounted on the plate 26 or on another fixed bridge relative to the plate. We thus see on the figure 2 a portion of the average wheel 34 driven by the second wheel 32 via a not visible second gear.

La figure 2 représente en outre un deuxième pont 36 dont l'utilité apparaîtra plus loin.The figure 2 further represents a second bridge 36 whose utility will appear later.

La figure 3 montre le pont 28 sans l'organe régulateur ni l'échappement. Seuls sont représentés les points de pivotement A de l'organe régulateur 30, B de la détente 12, C de la roue d'échappement 10 et D de la roue de seconde 32. La flèche F1 représente la direction des chocs latéraux qui peuvent être particulièrement nuisibles au fonctionnement d'un échappement à détente.The figure 3 shows the bridge 28 without the regulator member or the exhaust. Only the pivot points A of the regulating member 30, B of the trigger 12, C of the escape wheel 10 and D of the second wheel 32 are shown. The arrow F1 represents the direction of the lateral impacts which may be particularly detrimental to the operation of a detent escapement.

Pour atténuer les conséquences de ces chocs latéraux, le pont 28 est monté mobile autour du point D et peut pivoter selon une direction représentée par la flèche F2 grâce à un système de pivotement illustré sur la figure 4 et reliant le pont mobile 28 à la platine 26.To mitigate the consequences of these lateral shocks, the bridge 28 is mounted mobile about the point D and can rotate in a direction represented by the arrow F2 by means of a pivoting system illustrated on the figure 4 and connecting the movable bridge 28 to the plate 26.

Le système de pivotement peut être assuré par la construction suivante. Le pont mobile 28 est solidaire d'un canon 38 traversant la platine et dont une première extrémité 38a porte une pierre 40 sur laquelle pivote la roue de seconde 32. Un organe de pivotement 42, tel qu'un roulement à billes est ajusté sur le canon 38. Cet organe de pivotement prend place sans jeu dans un logement 44 ménagé dans la platine 26. L'organe de pivotement 42 assure ainsi l'interface entre le canon 38 (et donc le pont mobile 28) et la platine 26. Un élément de blocage 46, en l'espèce un écrou vissé à une deuxième extrémité 38b du canon 38, permet de maintenir le roulement en position sur la platine. Avantageusement, le roulement utilisé est un roulement à quatre points de contact de manière à supprimer tout ébat entre la platine 26 et le pont mobile 28. Particulièrement, les déplacements axiaux du pont, nuisibles à son pivotement, sont évités.The pivoting system can be provided by the following construction. The movable bridge 28 is secured to a barrel 38 passing through the plate and whose first end 38a carries a stone 40 on which the wheel of second 32. A pivoting member 42, such as a ball bearing is fitted on the barrel 38. This pivot member takes place without play in a housing 44 formed in the plate 26. The pivot member 42 thus ensures interface between the barrel 38 (and therefore the movable bridge 28) and the plate 26. A locking element 46, in this case a nut screwed to a second end 38b of the barrel 38, keeps the bearing in position on the platinum. Advantageously, the bearing used is a bearing with four contact points so as to eliminate any break between the plate 26 and the movable bridge 28. Especially the axial displacements of the bridge, harmful to its pivoting, are avoided.

Ainsi, des forces susceptibles de désengager la palette de repos 20 de la roue d'échappement 10 entraînent le pivotement du pont 28 et non le déplacement de la détente 12. Grâce au positionnement du point de pivotement du pont 28, la distance entre les différents mobiles n'est pas modifiée, ce qui garantit une marche constante de l'échappement.Thus, forces that can disengage the pallet 20 from the escape wheel 10 cause the pivoting of the bridge 28 and not the displacement of the trigger 12. By positioning the pivot point of the bridge 28, the distance between the different is not modified, which guarantees a constant running of the exhaust.

Il va de soi que le mode de réalisation décrit ci-dessus n'a été donné qu'à titre d'exemple non limitatif. L'homme du métier pourrait disposer d'autres roues du rouage de finissage sur le pont mobile 28 ou n'y monter que le pignon d'échappement et faire pivoter le pont autour de l'axe de la roue ou du pignon reliant la première partie du rouage de finissage portée par le pont et la deuxième partie du rouage de finissage fixe par rapport à la platine 26.It goes without saying that the embodiment described above has been given by way of non-limiting example. The skilled person could have other wheels of the gear train on the movable bridge 28 or mount only the exhaust pinion and rotate the bridge about the axis of the wheel or sprocket connecting the first part of the finishing gear carried by the bridge and the second part of the fixed finishing gear with respect to the plate 26.

Pour assurer un bon fonctionnement du mouvement et limiter la course du pont 28 afin qu'il ne heurte pas d'autres éléments du mouvement, un système d'amortissement 48 assure, d'une part, la limitation du mouvement du pont 28 et, d'autre part, un retour élastique de ce pont à une position de repos choisie par l'homme du métier de manière à le disposer aisément par rapport à l'ensemble du mouvement.To ensure proper operation of the movement and limit the stroke of the bridge 28 so that it does not hit other elements of the movement, a damping system 48 ensures, on the one hand, the limitation of the movement of the bridge 28 and, on the other hand, an elastic return of this bridge to a rest position chosen by those skilled in the art so as to have it easily with respect to the entire movement.

Le système d'amortissement 48 comporte un arbre 50 solidaire du pont mobile 28 et muni d'une portion 50a plus large s'appuyant sur le pont 28. Cette portion 50a est munie d'ouvertures 51 permettant la fixation de l'arbre sur le pont, par exemple par des goupilles.The damping system 48 comprises a shaft 50 secured to the movable bridge 28 and provided with a wider portion 50a resting on the bridge 28. This portion 50a is provided with openings 51 for fixing the shaft on the bridge, for example by pins.

Une première extrémité 50b de l'arbre prend place dans un deuxième logement 52 ménagé dans la platine. Ce logement 52 est légèrement plus grand que l'extrémité 50b de manière à définir un espace 54 entre l'arbre et la platine. Un organe élastique 56 est disposé au niveau de l'extrémité 50b, éventuellement dans une creusure que comporte l'arbre, et occupe au moins partiellement l'espace 54. Les rapports dimensionnels de l'organe élastique 56 et du logement 52 sont adaptés de manière à pouvoir disposer l'organe 56 avec une légère précontrainte dans le logement 52.A first end 50b of the shaft takes place in a second housing 52 formed in the plate. This dwelling 52 is slightly more large than the end 50b so as to define a space 54 between the shaft and the plate. An elastic member 56 is disposed at the end 50b, possibly in a recess that includes the shaft, and occupies at least partially the space 54. The dimensional ratios of the elastic member 56 and the housing 52 are adapted from in order to be able to arrange the member 56 with a slight prestress in the housing 52.

Selon un mode de réalisation avantageux et comme le montrent les figures 3a et 3b, l'organe élastique 56 est de forme toroïdale et est réalisé en une matière élastiquement déformable, du type caoutchouc.According to an advantageous embodiment and as shown by the Figures 3a and 3b , the elastic member 56 is toroidal in shape and is made of an elastically deformable material, of the rubber type.

Le logement 52 peut être d'une dimension supérieure à la dimension extérieure de l'organe élastique 56 et comporter, de part et d'autre, sur l'axe de déplacement du pont 28, deux protubérances 58 en saillie, pour contraindre l'organe élastique 56. Ainsi, le contact entre la platine 26 et l'organe élastique 56 est limité aux deux zones définies par les protubérances 58. De la sorte, la déformation de l'organe élastique 56 dans le sens du déplacement du pont 28 est favorisée.The housing 52 may be of a size greater than the external dimension of the elastic member 56 and comprise, on either side, on the axis of displacement of the bridge 28, two protuberances 58 projecting, to constrain the elastic member 56. Thus, the contact between the plate 26 and the elastic member 56 is limited to the two zones defined by the protuberances 58. In this way, the deformation of the elastic member 56 in the direction of movement of the bridge 28 is favored.

En outre, l'arbre 50 présente une rainure 62 définissant un logement supplémentaire situé à l'interface entre la platine 26 et le pont mobile 28. Un deuxième organe élastique 64 est disposé dans cette rainure de manière à permettre le glissement du pont mobile sur la platine. Le deuxième organe élastique 64 est dimensionné par rapport à la rainure 62 de manière à ce que le pont 28 ne soit pas en contact direct avec la platine 26.In addition, the shaft 50 has a groove 62 defining an additional housing located at the interface between the plate 26 and the movable bridge 28. A second elastic member 64 is disposed in this groove so as to allow the sliding bridge to slide on platinum. The second elastic member 64 is dimensioned with respect to the groove 62 so that the bridge 28 is not in direct contact with the plate 26.

Le deuxième pont 36 mentionné ci-dessus est disposé au-dessus d'une deuxième extrémité 50c de l'arbre, c'est-à-dire du côté opposé à la platine. Le pont 36 peut être fixé sur la platine et traverse alors le pont mobile 28 dans une ouverture oblongue 65, permettant de ne pas gêner le mouvement du pont 28. Un troisième organe élastique 66 est disposé au niveau de la deuxième extrémité 50c. Ce troisième organe élastique coopère avec le pont 36 de manière à maintenir axialement l'arbre 50 et à amortir les chocs axiaux. En outre, ce pont 36 permet de cacher le système d'amortissement du côté du cadran. Lors des déplacements du pont mobile 28, le troisième organe élastique 66 assure le glissement contre le pont 36.The second bridge 36 mentioned above is disposed above a second end 50c of the shaft, that is to say on the opposite side to the plate. The bridge 36 can be fixed on the plate and then passes through the movable bridge 28 in an oblong opening 65, allowing not to hinder the movement of the bridge 28. A third resilient member 66 is disposed at the second end 50c. This third elastic member cooperates with the bridge 36 so as to axially maintain the shaft 50 and to damp the axial shocks. In addition, this bridge 36 makes it possible to hide the damping system on the side of the dial. During the movements of the movable bridge 28, the third elastic member 66 slips against the bridge 36.

De préférence, les organes élastiques 56, 64 et 66 sont réalisés en nitrile, car ce matériau est particulièrement adapté à l'application visée en permettant, d'une part, un déplacement doux du pont mobile 28 par rapport à la platine 26 et au deuxième pont 36 et, d'autre part, un amortissement proportionnel à la compression exercée. Différents types de caoutchouc, de silicones ou de polymères variés peuvent également convenir, en fonction de la dimension choisie pour ces organes.Preferably, the elastic members 56, 64 and 66 are made of nitrile, because this material is particularly adapted to the intended application by allowing, on the one hand, a smooth movement of the movable bridge 28 with respect to the plate 26 and the second bridge 36 and, secondly, a damping proportional to the compression exerted. Different types of rubber, silicone or various polymers may also be suitable, depending on the size chosen for these organs.

Ainsi est proposé un mouvement de pièce d'horlogerie mécanique dont l'organe régulateur, l'échappement et une partie du rouage de finissage sont disposés sur un pont 28 pivoté sur la platine 26. Le point de pivotement du pont 28 est agencé de manière à ce que les chocs les plus préjudiciables au fonctionnement du mouvement, et plus particulièrement de l'échappement, entraînent le déplacement du pont. Un système d'amortissement 48 permet de dissiper une partie de l'énergie due au choc et de diminuer les conséquences négatives sur le mouvement. Dans le cas d'un échappement à détente tel qu'illustré dans la présente description, le risque de désengagement de la palette de repos est fortement diminué.Thus is proposed a mechanical timepiece movement whose regulating member, the exhaust and part of the work train are arranged on a bridge 28 pivoted on the plate 26. The pivot point of the bridge 28 is arranged so that the shocks most prejudicial to the operation of the movement, and more particularly of the exhaust, cause the displacement of the bridge. A damping system 48 makes it possible to dissipate part of the energy due to the shock and to reduce the negative consequences on the movement. In the case of a detent escapement as illustrated in the present description, the risk of disengagement of the pallet rest is greatly reduced.

L'exemple décrit ci-dessus n'a été donné qu'à titre d'illustration non limitative. Notamment en ce qui concerne le système d'amortissement, l'homme du métier pourra choisir diverses formes pour les organes élastiques. Ainsi, des tampons élastomères peuvent remplacer les organes toroïdaux. L'arbre 50 peut aussi être constitué d'un simple cylindre réalisé en un matériau relativement rigide mais élastiquement déformable ou en un cylindre métallique recouvert d'une couche d'un matériau élastique. L'arbre peut ne pas être fixé au pont mais simplement solidaire en étant monté gras dans le pont 28. L'essentiel est que ces organes élastiques permettent d'amortir les déplacements du pont mobile. Dans une version simplifiée sans pont 36, il n'est pas nécessaire que le troisième organe élastique présente des qualités de glissement particulières.The example described above has been given by way of non-limiting illustration. In particular with regard to the damping system, the skilled person may choose various forms for the elastic members. Thus, elastomeric pads can replace the toroidal organs. The shaft 50 may also consist of a simple cylinder made of a relatively rigid but elastically deformable material or a metal cylinder covered with a layer of an elastic material. The shaft may not be fixed to the bridge but simply secured by being mounted fat in the bridge 28. The essential is that these resilient members can dampen the movements of the movable bridge. In a simplified version without bridge 36, it is not necessary that the third elastic member has particular sliding qualities.

Claims (11)

  1. A mechanical clockwork movement comprising a plate (26), an energy source, a regulator organ (30), an escapement mechanism, and a going train formed from a train of several wheels kinematically connecting the energy source and the escapement mechanism,
    characterized in that said movement comprises a bridge (28) elastically pivoted relative to the plate (26) around a first axis, said bridge supporting said regulator organ (30), the escapement and a first part of the going train, a second part of the going train being mounted fixedly relative to the plate, a going train whereof the pivot axis is combined with said first axis, ensuring the connection between the two parts.
  2. The movement according to claim 1, wherein said going train comprises a so-called seconds wheel (32), characterized in that said bridge (28) is mounted pivoting around the axis of the so-called seconds wheel.
  3. The movement according to one of claims 1 and 2, characterized in that said bridge (28) is secured to a pivot element (38) on which said wheel of the going train ensuring the connection between said first and second parts of the going train pivots, said element pivoting in the plate using a pivot organ.
  4. The movement according to claim 3, characterized in that said pivot organ is a bearing with four contact points (42).
  5. The movement according to one of claims 1 to 4, characterized in that said bridge (28) includes a damping system (48) cooperating with the plate (26).
  6. The movement according to claim 5, characterized in that said damping system (48) is arranged so as to damp the pivoting movement of the bridge (28).
  7. The movement according to one of claims 5 and 6, characterized in that said damping system includes an arbor (50) secured to said bridge whereof a first end (50b) is placed in a housing (52) formed in the plate (26), said housing being slightly larger than said first end so as to define a space (54), an elastic organ (56) being positioned at said first end and at least partially occupying said space.
  8. The movement according to claim 7, characterized in that said arbor (50) defines an additional housing (62) situated at the interface between the plate (26) and the bridge (28), a second elastic organ (64) being positioned in said additional housing so as to allow the bridge (28) to slide on the plate (26).
  9. The movement according to one of claims 5 to 8, characterized in that said damping system (48) cooperates with a second bridge (36) positioned on the side opposite the plate (26).
  10. The movement according to one of claims 7 and 8, characterized in that a third elastic organ (66) is positioned at a second end (50c) of said arbor (50), said third elastic organ cooperating with a second bridge (36) positioned on the side opposite the plate (26).
  11. The movement according to one of claims 7 to 10, characterized in that said elastic organs (56, 64, 66) are made from nitrile.
EP06114358A 2006-05-23 2006-05-23 Timepiece movement comprising a mobile bridge Active EP1860511B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP06114358A EP1860511B1 (en) 2006-05-23 2006-05-23 Timepiece movement comprising a mobile bridge
AT06114358T ATE555427T1 (en) 2006-05-23 2006-05-23 CLOCK MOVEMENT WITH A MOBILE BRIDGE

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06114358A EP1860511B1 (en) 2006-05-23 2006-05-23 Timepiece movement comprising a mobile bridge

Publications (2)

Publication Number Publication Date
EP1860511A1 EP1860511A1 (en) 2007-11-28
EP1860511B1 true EP1860511B1 (en) 2012-04-25

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ID=37734815

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06114358A Active EP1860511B1 (en) 2006-05-23 2006-05-23 Timepiece movement comprising a mobile bridge

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EP (1) EP1860511B1 (en)
AT (1) ATE555427T1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI683192B (en) * 2017-12-19 2020-01-21 瑞士商奧米茄公司 Adjustable timepiece assembly

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2450756B1 (en) 2010-11-04 2015-01-07 Nivarox-FAR S.A. Anti-tripping device for escapement mechanism
CH704051B1 (en) 2010-11-04 2013-10-15 Nivarox Sa Exhaust for synchronous clockwork.
EP2450757B1 (en) 2010-11-04 2014-10-15 Nivarox-FAR S.A. Anti-tripping device for escapement mechanism
EP2977833B1 (en) * 2014-07-21 2018-01-03 Montres Breguet SA Accurate positioning of a timepiece bridge

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US451630A (en) * 1891-05-05 wtjthrich
CH126432A (en) * 1927-05-11 1928-06-16 Jacques Fontana Watch movement with cylinder escapement.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI683192B (en) * 2017-12-19 2020-01-21 瑞士商奧米茄公司 Adjustable timepiece assembly

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ATE555427T1 (en) 2012-05-15
EP1860511A1 (en) 2007-11-28

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