EP3637197B1 - Adjusting device for a timepiece retrograde display - Google Patents

Adjusting device for a timepiece retrograde display Download PDF

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Publication number
EP3637197B1
EP3637197B1 EP18200130.5A EP18200130A EP3637197B1 EP 3637197 B1 EP3637197 B1 EP 3637197B1 EP 18200130 A EP18200130 A EP 18200130A EP 3637197 B1 EP3637197 B1 EP 3637197B1
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EP
European Patent Office
Prior art keywords
display mechanism
retrograde display
adjustment
plate
retrograde
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EP18200130.5A
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German (de)
French (fr)
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EP3637197A1 (en
Inventor
Mehdi Denden
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Blancpain SA
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Blancpain SA
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Publication date
Application filed by Blancpain SA filed Critical Blancpain SA
Priority to EP18200130.5A priority Critical patent/EP3637197B1/en
Priority to JP2019178282A priority patent/JP6770623B2/en
Priority to US16/589,244 priority patent/US11442409B2/en
Priority to CN201910965529.XA priority patent/CN111045313B/en
Publication of EP3637197A1 publication Critical patent/EP3637197A1/en
Application granted granted Critical
Publication of EP3637197B1 publication Critical patent/EP3637197B1/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
    • G04B19/00—Indicating the time by visual means
    • G04B19/02—Back-gearing arrangements between gear train and hands
    • 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
    • G04B19/00—Indicating the time by visual means
    • G04B19/06—Dials
    • G04B19/08—Geometrical arrangement of the graduations
    • G04B19/082—Geometrical arrangement of the graduations varying from the normal closed scale
    • 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
    • G04B19/00—Indicating the time by visual means
    • 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
    • G04B19/00—Indicating the time by visual means
    • G04B19/04—Hands; Discs with a single mark or the like
    • 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
    • G04B35/00—Adjusting the gear train, e.g. the backlash of the arbors, depth of meshing of the gears

Definitions

  • the invention relates to a retrograde clockwork display mechanism, comprising a plate, and at least one rake pivotally mounted at a first shaft pivoting about a first pivot axis and comprising toothing centered on said first axis.
  • pivot which rake comprises a feeler finger arranged to follow the periphery of a cam that comprises said retrograde display mechanism and which is pivotally mounted at a second shaft pivoting about a second pivot axis.
  • the invention also relates to a timepiece movement comprising at least one such retrograde display mechanism.
  • the invention also relates to a timepiece, in particular a watch, comprising at least one such retrograde display mechanism.
  • the invention relates to the field of clockwork display mechanisms, and more particularly to the field of retrograde display mechanisms.
  • Retrograde display systems using a cam and a probe are, by design, imprecise. Indeed, the imprecision depends on the gear ratio between the feeler rake and the display pinion. In a concrete example, if the size does not allow an angle of travel of the rake limited to 25 °, while the display on the dial must be 270 °, this configuration implies a gear ratio of 10.8, and the Logical consequence is that any imprecision (element positioning tolerances, shape tolerances, pivoting clearances, deformation during driving of the cam on its shaft, or of the feeler rake on its shaft, and others) is amplified by the same factor on the l 'display. Any error is then amplified according to the same ratio due to the gear ratio.
  • the display initially planned on an angular sector of 270 ° is only done on an angular sector of 266 ° or 274 °, which is visible, and unpleasant for the user, the optical effect being able to still be amplified according to the design of the dial.
  • the document EP 3 208 665 A1 discloses a retrograde display mechanism comprising a device for adjusting the angular ratio between the rake and the feeler.
  • the invention proposes to develop a system for adjusting the angle of a retrograde display making it possible to overcome the limitations of the prior art, and to ensure good display precision.
  • the invention proposes a simple adjustment system which exploits this high reduction ratio between the feeler rake and the display pinion.
  • the invention relates to a retrograde clockwork display mechanism according to claim 1.
  • the invention also relates to a timepiece movement comprising at least one such retrograde display mechanism.
  • the invention also relates to a timepiece, in particular a watch, comprising at least one such retrograde display mechanism.
  • the invention allows a slight offset of the pivoting center of the feeler rake, or / and of the cam.
  • a variation in the angle of the feeler rake of +/- 0.37 ° allows an adjustment of +/- 4 ° on the retrograde display. This adjustment is necessary because it makes it possible to compensate for the manufacturing inaccuracies of the components which are unpredictable between two batches.
  • the invention relates to a retrograde clockwork display mechanism 10, comprising a plate 20, and at least one feeler rake 1.
  • This rake 1 is pivotally mounted at a first shaft 11 pivoting about a first axis of pivoting D1, and comprises a set of teeth 2 centered on this first pivot axis D1.
  • the rake 1 comprises a feeler finger 3, which is arranged to follow the periphery of a cam 4, which this retrograde display mechanism 10 comprises, and which is pivotally mounted at the level of a second shaft 12 pivoting around a second pivot axis D2.
  • the teeth 2 of the rake 1 are arranged to drive a display pinion 21, which carries or drives a display such as a needle or the like, not shown in the figures.
  • the reduction ratio between the feeler rake and the display pinion is 130/12.
  • a theoretical total rake angle of 24.929 ° corresponds to a theoretical angle of 270.06 ° on the display gear.
  • the actual angle of the retrograde display may deviate significantly from its theoretical value of 270 °, for take a value for example of only 267 °, which is visible on the display, and which should be avoided.
  • the invention proposes a new construction with an adjustment system: the feeler rake pivots on a shaft which is mounted on a plate, which can slide, via an eccentric, along at least one determined axis to have the greatest impact on the probe angle.
  • the position of the first pivot axis D1 and / or of the second pivot axis D2 is adjustable in position relative to the plate 20 by means of an adjustment plate 30, 40, carrying the first shaft 11 and / or the second shaft 12 respectively, and mounted to move with at least one degree of freedom with respect to the plate 20, and the position of which relative to the plate 20 is adjustable by an adjustment control means 50, so as to adjust the total angle of the retrograde display.
  • the adjustment plate 30, 40 comprises at least one journal 31, 32, 41, 42 movable in a loop 21, 22, which the plate comprises, and / or comprises at least one loop 33, 34, 43, 44 arranged to cooperate with a journal 23, 24, which the plate 20 comprises.
  • a loop is an oblong guide slot.
  • the figures 7 to 11 illustrate non-limiting variants of these configurations, in a simple version where the loops are rectilinear, and where each plate is guided in translation by two cord-trunnion pairs.
  • the adjustment plate 30, 40 comprises two journals 31, 32, 41, 42, each movable in a loop 21, 22, which the plate comprises. More particularly the first shaft 11 and / or respectively the second shaft 12 constitutes one of the journals 31, 32, 41, 42.
  • the adjustment plate 30, 40 comprises two loops 33, 34, 43, 44, each arranged to cooperate with a journal 23, 24, which the plate 20 comprises.
  • the retrograde display mechanism 10 comprises at least one play take-up spring 61, 62, arranged to push the first shaft 11 and / or respectively the second shaft 12 always in the same direction with respect to the plate 20. , and to hold the adjustment plate 30, 40.
  • the adjustment control means 50 comprises an eccentric screw 51 fixed to the plate and arranged to cooperate with a notch 52 which the adjustment plate 30, 40 comprises, or else comprises a notch formed in the plate 20 and with which is arranged to cooperate with an eccentric screw fixed on the adjustment plate 30, 40. More particularly, the adjustment control means comprises only this eccentric screw 51 which is unique.
  • the feeler finger 3 is arranged to come back into direct contact with the cam 4 after resetting, the cam 4 constituting an end stop of the feeler finger 3.
  • the adjustment control means 50 is arranged to control a translation of the center of rotation of the feeler finger 3 formed by the first pivot axis D1.
  • a linear travel of the first pivot axis D1 or / and of the second pivot axis D2 corresponds to a preferred embodiment, which is inexpensive to produce, and in which it is easy to revert to a previous adjustment. This does not exclude the possibility of enlarged geometric adjustments in the plane.
  • the adjustment control means 50 is arranged to control a rotation of the center of rotation of the feeler finger 3 formed by the first pivot axis D1.
  • the adjustment control means 50 is arranged to control a translation of the center of rotation of the cam 4 formed by the second pivot axis D2.
  • the adjustment control means is arranged to control a rotation of the center of rotation of the cam 4 formed by the second pivot axis D2.
  • the positions of the first pivot axis D1 and of the second pivot axis D2 are adjustable, and their relative mobility is limited by a mechanical connection between their respective adjustment plates 30, 40, for example by a bar comprising two pins each circulating in a lumen of one of the adjustment plates 30, 40, or the like.
  • the adjustment means 50 are movable during the running of the timepiece, for example the eccentric 51 or 52 can be controlled by the movement to describe a periodic angular travel, in one or two senses.
  • the invention also relates to a timepiece movement comprising at least one such retrograde display mechanism.
  • the invention also relates to a timepiece, in particular a watch, comprising at least one such retrograde display mechanism.
  • the invention it is possible to increase or decrease the total angle of a retrograde display in order to have an accurate display with a compact system.
  • the probe comes into contact with the cam after resetting, the cam is the minimum stop.
  • This arrangement is better than mechanisms with adjustment systems where the probe falls against an eccentric and not on the cam allowing the display angle to be increased, which then leads to another problem which is that the needle display, or the display if it is a disc, or other, remains frozen at zero for a certain time before restarting.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Electromechanical Clocks (AREA)

Description

Domaine de l'inventionField of the invention

L'invention concerne un mécanisme d'affichage rétrograde d'horlogerie, comportant une platine, et au moins un râteau monté pivotant au niveau d'un premier arbre pivotant autour d'un premier axe de pivotement et comportant une denture centrée sur ledit premier axe de pivotement, lequel râteau comporte un doigt palpeur agencé pour suivre la périphérie d'une came que comporte ledit mécanisme d'affichage rétrograde et qui est montée pivotante au niveau d'un deuxième arbre pivotant autour d'un deuxième axe de pivotement.The invention relates to a retrograde clockwork display mechanism, comprising a plate, and at least one rake pivotally mounted at a first shaft pivoting about a first pivot axis and comprising toothing centered on said first axis. pivot, which rake comprises a feeler finger arranged to follow the periphery of a cam that comprises said retrograde display mechanism and which is pivotally mounted at a second shaft pivoting about a second pivot axis.

L'invention concerne encore un mouvement d'horlogerie comportant au moins un tel mécanisme d'affichage rétrograde.The invention also relates to a timepiece movement comprising at least one such retrograde display mechanism.

L'invention concerne encore une pièce d'horlogerie, notamment une montre, comportant au moins un tel mécanisme d'affichage rétrograde.The invention also relates to a timepiece, in particular a watch, comprising at least one such retrograde display mechanism.

L'invention concerne le domaine des mécanismes d'affichage d'horlogerie, et plus particulièrement le domaine des mécanismes d'affichage rétrograde.The invention relates to the field of clockwork display mechanisms, and more particularly to the field of retrograde display mechanisms.

Arrière-plan de l'inventionBackground of the invention

Les systèmes d'affichages rétrogrades utilisant une came et un palpeur sont, par leur conception, imprécis. En effet, l'imprécision dépend du rapport d'engrenage entre le râteau palpeur et le pignon d'affichage. Dans un exemple concret, si l'encombrement n'autorise un angle de débattement du râteau limité à 25°, alors que l'affichage sur le cadran doit être de 270°, cette configuration implique un rapport d'engrenage de 10.8, et la conséquence logique est que toute imprécision (tolérances de positionnement des éléments, tolérances de formes, jeux de pivotement, déformation lors du chassage de la came sur son arbre, ou du râteau palpeur sur son arbre, et autres) est amplifiée du même facteur sur l'affichage. Toute erreur est alors amplifiée selon le même ratio dû au rapport d'engrenage. Il est alors possible que l'affichage initialement prévu sur un secteur angulaire de 270° ne se fasse que sur un secteur angulaire de 266° ou 274°, ce qui est visible, et désagréable pour l'utilisateur, l'effet optique pouvant encore être amplifié selon le design du cadran.Retrograde display systems using a cam and a probe are, by design, imprecise. Indeed, the imprecision depends on the gear ratio between the feeler rake and the display pinion. In a concrete example, if the size does not allow an angle of travel of the rake limited to 25 °, while the display on the dial must be 270 °, this configuration implies a gear ratio of 10.8, and the Logical consequence is that any imprecision (element positioning tolerances, shape tolerances, pivoting clearances, deformation during driving of the cam on its shaft, or of the feeler rake on its shaft, and others) is amplified by the same factor on the l 'display. Any error is then amplified according to the same ratio due to the gear ratio. It is then possible that the display initially planned on an angular sector of 270 ° is only done on an angular sector of 266 ° or 274 °, which is visible, and unpleasant for the user, the optical effect being able to still be amplified according to the design of the dial.

Le document EP 3 208 665 A1 divulgue un mécanisme d'affichage rétrograde comportant un dispositif de réglage du rapport angulaire entre le râteau et le palpeur.The document EP 3 208 665 A1 discloses a retrograde display mechanism comprising a device for adjusting the angular ratio between the rake and the feeler.

Résumé de l'inventionSummary of the invention

L'invention se propose de mettre au point un système de réglage d'angle d'un affichage rétrograde permettant de s'affranchir des limitations de l'art antérieur, et d'assurer une bonne précision d'affichage.The invention proposes to develop a system for adjusting the angle of a retrograde display making it possible to overcome the limitations of the prior art, and to ensure good display precision.

L'invention propose un système de réglage simple qui exploite ce fort rapport de réduction entre le râteau palpeur et le pignon d'affichage.The invention proposes a simple adjustment system which exploits this high reduction ratio between the feeler rake and the display pinion.

A cet effet, l'invention concerne un mécanisme d'affichage rétrograde d'horlogerie selon la revendication 1.To this end, the invention relates to a retrograde clockwork display mechanism according to claim 1.

L'invention concerne encore un mouvement d'horlogerie comportant au moins un tel mécanisme d'affichage rétrograde.The invention also relates to a timepiece movement comprising at least one such retrograde display mechanism.

L'invention concerne encore une pièce d'horlogerie, notamment une montre, comportant au moins un tel mécanisme d'affichage rétrograde.The invention also relates to a timepiece, in particular a watch, comprising at least one such retrograde display mechanism.

L'invention permet un léger décalage du centre de pivotement du râteau palpeur, ou/et de la came. Par exemple, sur l'exemple illustré par les figures présentées ci-dessous, une variation de l'angle du râteau palpeur de +/- 0.37° permet un réglage de +/- 4° sur l'affichage rétrograde. Ce réglage est nécessaire car il permet de compenser les imprécisions de fabrication des composants qui sont imprévisibles entre deux lots.The invention allows a slight offset of the pivoting center of the feeler rake, or / and of the cam. For example, in the example illustrated by the figures presented below, a variation in the angle of the feeler rake of +/- 0.37 ° allows an adjustment of +/- 4 ° on the retrograde display. This adjustment is necessary because it makes it possible to compensate for the manufacturing inaccuracies of the components which are unpredictable between two batches.

Description sommaire des dessinsBrief description of the drawings

D'autres caractéristiques et avantages de l'invention apparaîtront à la lecture de la description détaillée qui va suivre, en référence aux dessins annexés, où :

  • la figure 1 représente, de façon schématisée, et en plan, une commande d'affichage rétrograde selon l'art antérieur, avec un râteau palpeur pivoté sur une platine, et comportant un doigt suivant le contour périphérique d'une came escargot, le râteau palpeur comporte un secteur denté qui engrène avec un pignon porteur d'un afficheur rétrograde tel qu'une aiguille;
  • la figure 2 représente, de façon similaire à la figure 1, la géométrie du profil de la came de la figure 1, et la position de retour rétrograde lors de la chute du palpeur sur le limaçon ;
  • la figure 3 représente, de façon similaire à la figure 1, un mécanisme d'affichage rétrograde selon l'invention, selon une variante particulière où la position de l'arbre du râteau palpeur est réglable, grâce à une plaquette intermédiaire supportant cet arbre, et laquelle est réglable en position par rapport à la platine, notamment par deux lumières de guidage et un excentrique de réglage, et où un ressort de rattrapage de jeux prend appui sur cet arbre, et contraint la plaquette toujours dans le même sens, pour rattraper les jeux, et éviter le désindexage lors du réglage et lors des chocs éventuels ;
  • la figure 4 représente, de façon similaire à la figure 2, la géométrie du profil de la came de la figure 3, et la position de retour rétrograde lors de la chute du palpeur sur le limaçon, et un déplacement de l'axe de rotation de l'arbre du palpeur râteau vers la came par rapport à sa position théorique, d'une valeur de 0.0493 mm correspondant à un angle de chute de 25.2991° sur le limaçon ;
  • la figure 5 représente, de façon similaire à la figure 4, la géométrie du profil de la came de la figure 3, et la position de retour rétrograde lors de la chute du palpeur sur le limaçon, et un déplacement de l'axe de rotation de l'arbre du palpeur râteau en éloignement de la came par rapport à sa position théorique, d'une valeur de 0.0585 mm correspondant à un angle de chute de 24.5679° sur le limaçon ;
  • la figure 6 représente, de façon similaire aux figures 4 et 5, le point de contact du doigt palpeur avec la came lors du retour rétrograde, dans ces deux positions encadrant la position théorique;
  • la figure 7 représente, de façon schématisée, et en plan, une variante de réglage selon laquelle la position de l'axe du palpeur est réglable par une plaquette comportant des ganses coopérant avec des tourillons que comporte la platine ;
  • la figure 8 représente, de façon schématisée, et en plan, une variante de réglage selon laquelle la position de l'axe du palpeur est réglable par une plaquette comportant des tourillons coopérant avec des ganses que comporte la platine ;
  • la figure 9 représente, de façon schématisée, et en plan, une variante de réglage selon laquelle la position de l'axe de la came est réglable par une plaquette comportant des ganses coopérant avec des tourillons que comporte la platine ;
  • la figure 10 représente, de façon schématisée, et en plan, une variante de réglage selon laquelle la position de l'axe de la came est réglable par une plaquette comportant des tourillons coopérant avec des ganses que comporte la platine ;
  • la figure 11 est un schéma-blocs représentant une pièce d'horlogerie, notamment une montre, comportant un mouvement qui comporte lui-même un tel mécanisme d'affichage rétrograde.
Other characteristics and advantages of the invention will become apparent on reading the detailed description which follows, with reference to the appended drawings, where:
  • the figure 1 represents, schematically, and in plan, a retrograde display control according to the prior art, with a feeler rake pivoted on a plate, and comprising a finger following the peripheral contour of a snail cam, the feeler rake comprises a toothed sector which meshes with a pinion carrying a retrograde display such as a needle;
  • the figure 2 represents, similarly to the figure 1 , the geometry of the cam profile of the figure 1 , and the retrograde return position when the probe falls on the snail;
  • the figure 3 represents, similarly to the figure 1 , a retrograde display mechanism according to the invention, according to a particular variant where the position of the shaft of the feeler rake is adjustable, thanks to an intermediate plate supporting this shaft, and which is adjustable in position relative to the plate, especially by two guide lights and an adjustment eccentric, and where a play take-up spring is supported on this shaft, and forces the plate always in the same direction, to take up the play, and avoid deindexing during adjustment and during shocks possible;
  • the figure 4 represents, similarly to the figure 2 , the geometry of the cam profile of the figure 3 , and the retrograde return position when the probe falls onto the snail, and a displacement of the axis of rotation of the rake probe shaft towards the cam with respect to its theoretical position, by a value of 0.0493 mm corresponding to a fall angle of 25.2991 ° on the snail;
  • the figure 5 represents, similarly to the figure 4 , the geometry of the cam profile of the figure 3 , and the retrograde return position when the probe falls onto the snail, and a displacement of the axis of rotation of the shaft of the rake probe away from the cam with respect to its theoretical position, by a value of 0.0585 mm corresponding to a fall angle of 24.5679 ° on the snail;
  • the figure 6 represents, similarly to figures 4 and 5 , the point of contact of the feeler finger with the cam during retrograde return, in these two positions surrounding the theoretical position;
  • the figure 7 represents, schematically, and in plan, an adjustment variant according to which the position of the axis of the probe is adjustable by a plate comprising loops cooperating with journals that the plate comprises;
  • the figure 8 shows, schematically, and in plan, an adjustment variant according to which the position of the axis of the probe is adjustable by a plate comprising journals cooperating with loops that the plate comprises;
  • the figure 9 shows, schematically, and in plan, an adjustment variant according to which the position of the axis of the cam is adjustable by a plate comprising loops cooperating with journals that the plate comprises;
  • the figure 10 represents, schematically, and in plan, an adjustment variant according to which the position of the axis of the cam is adjustable by a plate comprising journals cooperating with loops that the plate comprises;
  • the figure 11 is a block diagram showing a timepiece, in particular a watch, comprising a movement which itself comprises such a retrograde display mechanism.

Description détaillée des modes de réalisation préférésDetailed description of the preferred embodiments

L'invention concerne un mécanisme d'affichage rétrograde 10 d'horlogerie, comportant une platine 20, et au moins un râteau palpeur 1. Ce râteau 1 est monté pivotant au niveau d'un premier arbre 11 pivotant autour d'un premier axe de pivotement D1, et comporte une denture 2 centrée sur ce premier axe de pivotement D1. Le râteau 1 comporte un doigt palpeur 3, qui est agencé pour suivre la périphérie d'une came 4, que comporte ce mécanisme d'affichage rétrograde 10, et qui est montée pivotante au niveau d'un deuxième arbre 12 pivotant autour d'un deuxième axe de pivotement D2. La denture 2 du râteau 1 est agencée pour entraîner un pignon d'affichage 21, lequel porte ou entraîne un afficheur tel qu'une aiguille ou similaire, non représenté sur les figures.The invention relates to a retrograde clockwork display mechanism 10, comprising a plate 20, and at least one feeler rake 1. This rake 1 is pivotally mounted at a first shaft 11 pivoting about a first axis of pivoting D1, and comprises a set of teeth 2 centered on this first pivot axis D1. The rake 1 comprises a feeler finger 3, which is arranged to follow the periphery of a cam 4, which this retrograde display mechanism 10 comprises, and which is pivotally mounted at the level of a second shaft 12 pivoting around a second pivot axis D2. The teeth 2 of the rake 1 are arranged to drive a display pinion 21, which carries or drives a display such as a needle or the like, not shown in the figures.

Sur l'exemple de réalisation non limitatif illustré par les figures, le rapport de réduction entre le râteau palpeur et le pignon d'affichage est de 130/12. Un angle total théorique du râteau de 24.929° correspond à un angle théorique de 270.06° sur le pignon d'affichage. Naturellement, si du fait de la fabrication, des erreurs minimes se cumulent, et surtout sont amplifiées du fait du rapport d'engrenage, l'angle réel de l'affichage rétrograde peut s'écarter sensiblement de sa valeur théorique de 270°, pour prendre une valeur par exemple de 267° seulement, ce qui est visible sur l'affichage, et qu'il convient d'éviter.In the non-limiting example of embodiment illustrated by the figures, the reduction ratio between the feeler rake and the display pinion is 130/12. A theoretical total rake angle of 24.929 ° corresponds to a theoretical angle of 270.06 ° on the display gear. Naturally, if due to the manufacture, minimal errors accumulate, and especially are amplified due to the gear ratio, the actual angle of the retrograde display may deviate significantly from its theoretical value of 270 °, for take a value for example of only 267 °, which is visible on the display, and which should be avoided.

Les erreurs inévitables ont plusieurs sources, dont les effets se cumulent : tolérances de positionnement des éléments, tolérances de formes, jeux de pivotement dans les pivots, déformation lors du chassage de la came sur son arbre, ou du râteau palpeur sur son arbre, et autres.The inevitable errors have several sources, the effects of which are cumulative: tolerances in the positioning of the elements, tolerances of shapes, pivoting play in the pivots, deformation during the driving of the cam on its shaft, or the feeler rake on its shaft, and other.

L'invention propose une nouvelle construction avec un système de réglage: le râteau palpeur pivote sur un arbre qui est monté sur une plaquette, laquelle peut coulisser, via un excentrique, selon au moins un axe déterminé pour avoir le plus fort impact sur l'angle du palpeur.The invention proposes a new construction with an adjustment system: the feeler rake pivots on a shaft which is mounted on a plate, which can slide, via an eccentric, along at least one determined axis to have the greatest impact on the probe angle.

Ainsi, selon l'invention, la position du premier axe de pivotement D1 et/ou du deuxième axe de pivotement D2 est réglable en position par rapport à la platine 20 par le moyen d'une plaquette de réglage 30, 40, portant le premier arbre 11 et/ou respectivement le deuxième arbre 12, et montée mobile avec au moins un degré de liberté par rapport à la platine 20, et dont la position par rapport à la platine 20 est réglable par un moyen de commande de réglage 50, de façon à effectuer le réglage de l'angle total de l'affichage rétrograde.Thus, according to the invention, the position of the first pivot axis D1 and / or of the second pivot axis D2 is adjustable in position relative to the plate 20 by means of an adjustment plate 30, 40, carrying the first shaft 11 and / or the second shaft 12 respectively, and mounted to move with at least one degree of freedom with respect to the plate 20, and the position of which relative to the plate 20 is adjustable by an adjustment control means 50, so as to adjust the total angle of the retrograde display.

Plus particulièrement, la plaquette de réglage 30, 40, comporte au moins un tourillon 31, 32, 41, 42 mobile dans une ganse 21, 22, que comporte la platine, et/ou comporte au moins une ganse 33, 34, 43, 44 agencée pour coopérer avec un tourillon 23, 24, que comporte la platine 20. Rappelons qu'en horlogerie une ganse est une lumière oblongue de guidage. Les figures 7 à 11 illustrent des variantes non limitatives de ces configurations, dans une version simple où les ganses sont rectilignes, et où chaque plaquette est guidée en translation par deux couples ganse-tourillon. Naturellement d'autres configurations sont envisageables, par exemple une ganse unique en arc de cercle permettant un pivotement de la plaquette, ou avec plus de deux ganses, notamment avec l'emploi de ganses avec des directions croisées permettant un positionnement à deux dimensions par rapport au plan de la platine. Les variantes illustrées ont l'avantage d'être très simples, faciles à mettre en œuvre, et répondent parfaitement au besoin d'ajustement, notamment quand la direction des ganses est sensiblement parallèle à la direction que définissent ensemble les positions théoriques du premier axe de pivotement D1 et du deuxième axe de pivotement D2.More particularly, the adjustment plate 30, 40 comprises at least one journal 31, 32, 41, 42 movable in a loop 21, 22, which the plate comprises, and / or comprises at least one loop 33, 34, 43, 44 arranged to cooperate with a journal 23, 24, which the plate 20 comprises. It should be remembered that in watchmaking a loop is an oblong guide slot. The figures 7 to 11 illustrate non-limiting variants of these configurations, in a simple version where the loops are rectilinear, and where each plate is guided in translation by two cord-trunnion pairs. Naturally, other configurations can be envisaged, for example a single loop in the shape of an arc of a circle allowing the plate to pivot, or with more than two loops, in particular with the use of straps with crossed directions allowing two-dimensional positioning with respect to in the plane of the plate. The illustrated variants have the advantage of being very simple, easy to implement, and perfectly meet the need for adjustment, in particular when the direction of the loops is substantially parallel to the direction which together define the theoretical positions of the first axis of pivot D1 and the second pivot axis D2.

Ainsi, dans une variante la plaquette de réglage 30, 40, comporte deux tourillons 31, 32, 41, 42, chacun mobile dans une ganse 21, 22, que comporte la platine. Plus particulièrement le premier arbre 11 et/ou respectivement le deuxième arbre 12 constitue un des tourillons 31, 32, 41, 42.Thus, in a variant, the adjustment plate 30, 40 comprises two journals 31, 32, 41, 42, each movable in a loop 21, 22, which the plate comprises. More particularly the first shaft 11 and / or respectively the second shaft 12 constitutes one of the journals 31, 32, 41, 42.

Dans une autre variante la plaquette de réglage 30, 40, comporte deux ganses 33, 34, 43, 44, chacune agencée pour coopérer avec un tourillon 23, 24, que comporte la platine 20.In another variant, the adjustment plate 30, 40 comprises two loops 33, 34, 43, 44, each arranged to cooperate with a journal 23, 24, which the plate 20 comprises.

De façon avantageuse, le mécanisme d'affichage rétrograde 10 comporte au moins un ressort de rattrapage de jeux 61, 62, agencé pour pousser le premier arbre 11 et/ou respectivement le deuxième arbre 12 toujours dans le même sens par rapport à la platine 20, et pour maintenir la plaquette de réglage 30, 40.Advantageously, the retrograde display mechanism 10 comprises at least one play take-up spring 61, 62, arranged to push the first shaft 11 and / or respectively the second shaft 12 always in the same direction with respect to the plate 20. , and to hold the adjustment plate 30, 40.

Plus particulièrement le moyen de commande de réglage 50 comporte une vis excentrique 51 fixée sur la platine et agencée pour coopérer avec une encoche 52 que comporte la plaquette de réglage 30, 40, ou bien comporte une encoche ménagée dans la platine 20 et avec laquelle est agencée pour coopérer une vis excentrique fixée sur la plaquette de réglage 30, 40. Plus particulièrement le moyen de commande de réglage comporte uniquement cette vis excentrique 51 qui est unique.More particularly, the adjustment control means 50 comprises an eccentric screw 51 fixed to the plate and arranged to cooperate with a notch 52 which the adjustment plate 30, 40 comprises, or else comprises a notch formed in the plate 20 and with which is arranged to cooperate with an eccentric screw fixed on the adjustment plate 30, 40. More particularly, the adjustment control means comprises only this eccentric screw 51 which is unique.

Plus particulièrement le doigt palpeur 3 est agencé pour revenir en contact direct avec la came 4 après la remise à zéro, la came 4 constituant une butée de fin de course du doigt palpeur 3.More particularly, the feeler finger 3 is arranged to come back into direct contact with the cam 4 after resetting, the cam 4 constituting an end stop of the feeler finger 3.

Dans une variante le moyen de commande de réglage 50 est agencé pour commander une translation du centre de rotation du doigt palpeur 3 constitué par le premier axe de pivotement D1.In a variant, the adjustment control means 50 is arranged to control a translation of the center of rotation of the feeler finger 3 formed by the first pivot axis D1.

Une course linéaire du premier axe de pivotement D1 ou/et du deuxième axe de pivotement D2 correspond à une réalisation préférée, de réalisation peu coûteuse, et dans laquelle il est facile de revenir sur un réglage antérieur. Ceci n'exclut pas la possibilité de réglages géométriques élargis dans le plan.A linear travel of the first pivot axis D1 or / and of the second pivot axis D2 corresponds to a preferred embodiment, which is inexpensive to produce, and in which it is easy to revert to a previous adjustment. This does not exclude the possibility of enlarged geometric adjustments in the plane.

Dans une variante le moyen de commande de réglage 50 est agencé pour commander une rotation du centre de rotation du doigt palpeur 3 constitué par le premier axe de pivotement D1.In a variant, the adjustment control means 50 is arranged to control a rotation of the center of rotation of the feeler finger 3 formed by the first pivot axis D1.

Dans une variante le moyen de commande de réglage 50 est agencé pour commander une translation du centre de rotation de la came 4 constitué par le deuxième axe de pivotement D2.In a variant, the adjustment control means 50 is arranged to control a translation of the center of rotation of the cam 4 formed by the second pivot axis D2.

Dans une variante le moyen de commande de réglage est agencé pour commander une rotation du centre de rotation de la came 4 constitué par le deuxième axe de pivotement D2.In a variant, the adjustment control means is arranged to control a rotation of the center of rotation of the cam 4 formed by the second pivot axis D2.

Dans une autre variante non illustrée, les positions du premier axe de pivotement D1 et du deuxième axe de pivotement D2 sont réglables, et leur mobilité relative est limitée par une liaison mécanique entre leurs plaquettes de réglage 30, 40, respectives, par exemple par une barre comportant deux goupilles chacune circulant dans une lumière de l'une des plaquettes de réglage 30, 40, ou autre.In another variant not shown, the positions of the first pivot axis D1 and of the second pivot axis D2 are adjustable, and their relative mobility is limited by a mechanical connection between their respective adjustment plates 30, 40, for example by a bar comprising two pins each circulating in a lumen of one of the adjustment plates 30, 40, or the like.

Si l'invention concerne essentiellement un réglage de position à zéro, il est possible d'en extrapoler le principe à des réglages dynamiques. Ainsi, dans une autre variante encore, non illustrée, les moyens de réglage 50 sont mobiles pendant la marche de la pièce d'horlogerie, par exemple l'excentrique 51 ou 52 peut être commandé par le mouvement pour décrire une course angulaire périodique, dans un ou deux sens.If the invention relates essentially to a position adjustment at zero, it is possible to extrapolate the principle thereof to dynamic adjustments. Thus, in yet another variant, not illustrated, the adjustment means 50 are movable during the running of the timepiece, for example the eccentric 51 or 52 can be controlled by the movement to describe a periodic angular travel, in one or two senses.

L'invention concerne encore un mouvement d'horlogerie comportant au moins un tel mécanisme d'affichage rétrograde.The invention also relates to a timepiece movement comprising at least one such retrograde display mechanism.

L'invention concerne encore une pièce d'horlogerie, notamment une montre, comportant au moins un tel mécanisme d'affichage rétrograde.The invention also relates to a timepiece, in particular a watch, comprising at least one such retrograde display mechanism.

Grâce à l'invention, il est possible de procéder à l'augmentation ou la diminution de l'angle total d'un affichage rétrograde afin d'avoir un affichage précis avec un système à faible encombrement. En effet, en général, pour ne pas avoir d'imprécision sur l'affichage, il faut avoir un rapport voisin de 6 entre l'angle du palpeur et l'angle de l'affichage rétrograde. On comprend alors que pour avoir un affichage à 300° sur le cadran sans système de réglage, il faut avoir un palpeur parcourant un angle de 50°.Thanks to the invention, it is possible to increase or decrease the total angle of a retrograde display in order to have an accurate display with a compact system. In general, in order not to have any imprecision on the display, it is necessary to have a ratio close to 6 between the angle of the probe and the angle of the retrograde display. It is then understood that to have a display at 300 ° on the dial without an adjustment system, it is necessary to have a probe traversing an angle of 50 °.

Le palpeur revient en contact avec la came après la remise à zéro, la came est la butée mini. Cette disposition est meilleure que des mécanismes avec des systèmes de réglage où le palpeur vient chuter contre un excentrique et non sur la came permettant l'augmentation de l'angle d'affichage, ce qui amène alors un autre problème qui est que l'aiguille d'affichage, ou l'afficheur s'il s'agit d'un disque, ou autre, reste figé sur le zéro pendant un certain temps avant de repartir.The probe comes into contact with the cam after resetting, the cam is the minimum stop. This arrangement is better than mechanisms with adjustment systems where the probe falls against an eccentric and not on the cam allowing the display angle to be increased, which then leads to another problem which is that the needle display, or the display if it is a disc, or other, remains frozen at zero for a certain time before restarting.

Dans la variante illustrée par les figures, un seul excentrique permet le réglage de la plage d'affichage. Le réglage est donc assez simple.In the variant illustrated by the figures, a single eccentric makes it possible to adjust the display range. The adjustment is therefore quite simple.

La constitution du mécanisme selon l'invention est peu complexe, pour réaliser de façon fiable l'ajustement de l'angle d'un affichage rétrograde par déplacement (translation ou rotation) du centre de rotation du palpeur et ou de la came. Le mécanisme nécessite seulement :

  • un râteau monté sur une plaquette de réglage permettant sa translation ;
  • cette plaquette de réglage pilotée par excentrique pour faciliter l'intervention de l'horloger ;
  • un ressort maintenant la plaquette de réglage, et rattrapant les jeux de pivotement des éléments.
The constitution of the mechanism according to the invention is not very complex, in order to reliably adjust the angle of a retrograde display by displacement (translation or rotation) of the center of rotation of the probe and / or of the cam. The mechanism only requires:
  • a rake mounted on an adjustment plate allowing its translation;
  • this adjustment plate controlled by an eccentric to facilitate the watchmaker's intervention;
  • a spring holding the adjustment plate, and taking up the pivoting play of the elements.

En somme, l'invention, simple à réaliser, procure des avantages substantiels :

  • la possibilité de régler l'angle d'affichage rétrograde d'un élément par la simple action d'un excentrique, et notamment d'un excentrique unique ;
  • la compensation des intolérances de fabrication pour un affichage rétrograde.
In short, the invention, simple to implement, provides substantial advantages:
  • the possibility of adjusting the retrograde display angle of an element by the simple action of an eccentric, and in particular of a single eccentric;
  • compensation for manufacturing intolerances for a retrograde display.

Claims (16)

  1. Retrograde timepiece display mechanism (10) comprising a main plate (20) and at least one rack (1) pivotally mounted on a first arbor (11) pivoting about a first pivot axis (D1) and comprising a toothing (2) centred on said first pivot axis (D1), which rack (1) includes a sensing finger (3) arranged to follow the periphery of a cam (4) comprised in said retrograde display mechanism (10) and which is pivotally mounted on a second arbor (12) pivoting about a second pivot axis (D2), characterized in that the position of said first pivot axis (D1) and/or of said second pivot axis (D2) is adjustable with respect to said main plate (20) by means of an adjustment plate (30; 40) carrying said first arbor (11) and/or respectively said second arbor (12) and movably mounted with at least one degree of freedom with respect to said main plate (20), and whose position with respect to said main plate (20) is adjustable by an adjustment control means (50), in order to adjust the total angle of said retrograde display.
  2. Retrograde display mechanism (10) according to claim 1, characterized in that said adjustment plate (30; 40) comprises at least one trunnion (31, 32; 41, 42) movable in an oblong hole (21; 22) comprised in said main plate, and/or comprises at least one oblong hole (33, 34; 43, 44) arranged to cooperate with a trunnion (23; 24) comprised in said main plate (20).
  3. Retrograde display mechanism (10) according to claim 2, characterized in that said adjustment plate (30; 40) comprises two trunnions (31, 32; 41, 42) each movable in an oblong hole (21; 22) comprised in said main plate.
  4. Retrograde display mechanism (10) according to claim 3, characterized in that said first arbor (11) and/or respective said second arbor (12) forms one of said trunnions (31, 32; 41, 42).
  5. Retrograde display mechanism (10) according to claim 2, characterized in that said adjustment plate (30; 40) includes two oblong holes (33, 34; 43, 44) each arranged to cooperate with one trunnion (23; 23) comprised in said main plate (20).
  6. Retrograde display mechanism (10) according to any one of the claims 1 to 5, characterized in that said retrograde display mechanism (10) includes at least one play compensation spring (61; 62) arranged always to push said first arbor (11) and/or respectively said second arbor (12) in the same direction with respect to said plate (20) and to retain said adjustment plate (30; 40).
  7. Retrograde display mechanism (10) according to any one of the claims 1 to 6, characterized in that said adjustment control means comprises an eccentric screw (51) secured to said main plate and arranged to engage with a notch (52) comprised in said adjustment plate (30; 40), or comprises a notch provided in said main plate (20) and which is arranged to engage with an eccentric screw fixed to said adjustment plate (30; 40).
  8. Retrograde display mechanism (10) according to claim 7, characterized in that said adjustment control means comprises only a single said eccentric screw (51).
  9. Retrograde display mechanism (10) according to any one of the claims 1 to 8, characterized in that said sensing finger (3) is arranged to move back into direct contact with said cam (4) after the return-to-zero operation, said cam (4) forming an end of travel stop for said sensing finger (3).
  10. Retrograde display mechanism (10) according to any one of the claims 1 to 9, characterized in that said adjustment control means is arranged to control a translation of the centre of rotation of said sensing finger (3) formed by said first pivot axis (D1).
  11. Retrograde display mechanism (10) according to any one of the claims 1 to 9, characterized in that said adjustment control means is arranged to control a rotation of the centre of rotation of said sensing finger (3) formed by said first pivot axis (D1).
  12. Retrograde display mechanism (10) according to any one of the claims 1 to 9, characterized in that said adjustment control means is arranged to control a translation of the centre of rotation of said cam (4) formed by said second pivot axis (D2).
  13. Retrograde display mechanism (10) according to any one the claims 1 to 9, characterized in that said adjustment control means is arranged to control a rotation of the centre of rotation of said cam (4) formed by said second pivot axis (D2).
  14. Timepiece movement (100) including at least one retrograde display mechanism (10) according to any one of the claims 1 to 13.
  15. Timepiece (1000) including at least one retrograde display mechanism (10) according to any one of the claims 1 to13.
  16. Timepiece (1000) according to claim 15, characterized in that the timepiece is a watch.
EP18200130.5A 2018-10-12 2018-10-12 Adjusting device for a timepiece retrograde display Active EP3637197B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP18200130.5A EP3637197B1 (en) 2018-10-12 2018-10-12 Adjusting device for a timepiece retrograde display
JP2019178282A JP6770623B2 (en) 2018-10-12 2019-09-30 A device that adjusts the retrograde display for timekeepers
US16/589,244 US11442409B2 (en) 2018-10-12 2019-10-01 Device for adjusting a retrograde timepiece display
CN201910965529.XA CN111045313B (en) 2018-10-12 2019-10-11 Device for adjusting display mechanism of retrograde clock

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18200130.5A EP3637197B1 (en) 2018-10-12 2018-10-12 Adjusting device for a timepiece retrograde display

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EP3637197A1 EP3637197A1 (en) 2020-04-15
EP3637197B1 true EP3637197B1 (en) 2021-05-19

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EP (1) EP3637197B1 (en)
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EP3869280B1 (en) * 2020-02-19 2024-04-17 Montres Breguet S.A. Timepiece display mechanism
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EP4020099A1 (en) * 2020-12-24 2022-06-29 Blancpain SA Retrograde display mechanism for a timepiece of the continuous type provided with a lever for disengagement of the display

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EP3637197A1 (en) 2020-04-15
JP6770623B2 (en) 2020-10-14
CN111045313B (en) 2021-07-06
US20200117142A1 (en) 2020-04-16
JP2020060560A (en) 2020-04-16
CN111045313A (en) 2020-04-21
US11442409B2 (en) 2022-09-13

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