EP3428738A1 - Drive and positioning system and jumper for implementing said system - Google Patents

Drive and positioning system and jumper for implementing said system Download PDF

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Publication number
EP3428738A1
EP3428738A1 EP17195976.0A EP17195976A EP3428738A1 EP 3428738 A1 EP3428738 A1 EP 3428738A1 EP 17195976 A EP17195976 A EP 17195976A EP 3428738 A1 EP3428738 A1 EP 3428738A1
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EP
European Patent Office
Prior art keywords
jumper
drive
positioning system
cam
wheel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP17195976.0A
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German (de)
French (fr)
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EP3428738B1 (en
Inventor
Stéphane von Gunten
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Manufacture et Fabrique de Montres et Chronometres Ulysse Nardin Le Locle SA
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Manufacture et Fabrique de Montres et Chronometres Ulysse Nardin Le Locle SA
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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
    • G04B19/24—Clocks or watches with date or week-day indicators, i.e. calendar clocks or watches; Clockwork calendars
    • G04B19/243—Clocks or watches with date or week-day indicators, i.e. calendar clocks or watches; Clockwork calendars characterised by the shape of the date indicator
    • G04B19/247—Clocks or watches with date or week-day indicators, i.e. calendar clocks or watches; Clockwork calendars characterised by the shape of the date indicator disc-shaped
    • 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
    • G04B11/00—Click devices; Stop clicks; Clutches
    • G04B11/02—Devices allowing the motion of a rotatable part in only one direction
    • G04B11/04—Pawl constructions therefor, e.g. pawl secured to an oscillating member actuating a ratchet
    • 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
    • G04B13/00—Gearwork
    • G04B13/002—Gearwork where rotation in one direction is changed into a stepping movement

Definitions

  • the drive and positioning system comprises a synchronization cam driven by the driving wheel and a probe comprising an end held in contact with the periphery of the synchronization cam and cooperating with the jumper, said synchronization cam. and said probe being arranged to exert on the jumper, at least when the n drive members cooperate with the driven wheel, a force whose moment relative to the axis of the jumper opposes the moment induced by the force exerted by the spring with respect to said axis of the jumper.
  • the drive and positioning system further comprises a synchronization cam 24 driven by the driving wheel 10 and a probe 26 comprising an end held in contact with the periphery of the cam and cooperating with the jumper 16.
  • the synchronization cam 24 and the feeler 26 are arranged to exert on the jumper 16, at least when the drive member 14 cooperates with the driven wheel 12, a force whose moment relative to the axis of the jumper opposes the moment induced by the force exerted by the spring, with respect to said axis of the jumper.
  • the maximum torque required to drive the driven wheel 12 is reduced, without decreasing the force of the spring member 20 of the jumper 16, which allows to maintain a good security.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transmission Devices (AREA)
  • Measurement Of Distances Traversed On The Ground (AREA)
  • Electromechanical Clocks (AREA)

Abstract

L'invention concerne un système d'entraînement et de positionnement d'un mobile d'affichage, comprenant :
- une roue menante (10) comportant n organes d'entraînement (14),
- une roue menée (12) destinée à être entraînée par les n organes d'entraînement (14),
- un sautoir (16) comprenant une zone de positionnement (18) et un organe ressort (20) agencé pour presser la zone de positionnement (18) contre la roue menée (12) et la positionner angulairement.The invention relates to a drive and positioning system for a display mobile, comprising:
a driving wheel (10) comprising n drive members (14),
a driven wheel (12) intended to be driven by the n drive members (14),
- A jumper (16) comprising a positioning zone (18) and a spring member (20) arranged to press the positioning zone (18) against the driven wheel (12) and position it angularly.

Selon l'invention, ce système comprend une came de synchronisation (24) entraînée par la roue menante (10) et un palpeur (26) comprenant une extrémité maintenue au contact de la périphérie de la came de synchronisation (24) et coopérant avec le sautoir (16), ladite came de synchronisation (24) et ledit palpeur (26) étant agencés de manière à exercer sur le sautoir (16), au moins lorsque les n organes d'entraînement (14) coopèrent avec la roue menée (12), une force dont le moment par rapport à l'axe de rotation du sautoir s'oppose au moment induit par la force exercée par le ressort, par rapport audit axe de rotation du sautoir.According to the invention, this system comprises a synchronization cam (24) driven by the driving wheel (10) and a probe (26) comprising an end held in contact with the periphery of the synchronization cam (24) and cooperating with the jumper (16), said synchronization cam (24) and said feeler (26) being arranged to exert on the jumper (16), at least when the n drive members (14) cooperate with the driven wheel (12). ), a force whose moment relative to the axis of rotation of the jumper opposes the moment induced by the force exerted by the spring, with respect to said axis of rotation of the jumper.

Une revendication indépendante concerne un sautoir adapté pour ce système d'entraînement.

Figure imgaf001
An independent claim relates to a jumper suitable for this drive system.
Figure imgaf001

Description

Domaine techniqueTechnical area

La présente invention se rapporte au domaine de l'horlogerie. Elle concerne, plus particulièrement, un système d'entraînement et de positionnement, particulièrement adapté pour entraîner et positionner un mobile d'affichage, spécialement un mobile d'affichage de type sautant. Ce genre de système comprend une roue menante, une roue menée destinée à être entraînée par la roue menante, et un sautoir comprenant deux plans inclinés et un organe ressort agencé pour presser les plans inclinés contre la roue menée et la positionner angulairement. La roue menée porte en général le mobile d'affichage, bien que celui-ci puisse aussi être situé plus en aval dans la chaine cinématique. L'invention concerne également un sautoir pour la mise en oeuvre du système d'entraînement et de positionnement selon l'invention.The present invention relates to the field of watchmaking. It relates, more particularly, a drive and positioning system, particularly suitable for driving and positioning a display mobile, especially a jumping type display mobile. This type of system comprises a driving wheel, a driven wheel intended to be driven by the driving wheel, and a jumper comprising two inclined planes and a spring member arranged to press the inclined planes against the driven wheel and position it angularly. The driven wheel generally carries the display mobile, although it can also be located further downstream in the kinematic chain. The invention also relates to a jumper for the implementation of the drive and positioning system according to the invention.

Etat de la techniqueState of the art

De manière courante, un mobile d'affichage de type sautant est lié à une roue menée, entraînée périodiquement par une roue menante. La roue menée est positionnée par un sautoir, dont les plans inclinés prennent appui entre deux dents ou branches de la roue menée. Le mobile d'affichage est donc susceptible d'occuper des positions indexées, définies par l'action du sautoir entre les dents ou branches de la roue menée. Si le sautoir permet de maintenir le mobile d'affichage dans les positions indexées, il participe également à l'entraînement de la roue menée, en terminant le pas commencé par la roue menante. En effet, celle-ci entraîne la roue menée en soulevant le sautoir et en contraignant l'organe ressort jusqu'à ce que le sommet du sautoir situé entre les plans inclinés passe entre deux dents ou branches suivantes. Sous l'action de l'organe ressort, le sautoir pousse alors la roue menée pour terminer le pas angulaire d'entraînement de la roue menée.Commonly, a jumping type display mobile is linked to a driven wheel driven periodically by a driving wheel. The driven wheel is positioned by a jumper, the inclined planes bear between two teeth or branches of the driven wheel. The mobile display is likely to occupy indexed positions, defined by the action of the jumper between the teeth or branches of the driven wheel. If the jumper keeps the mobile display in the indexed positions, it also participates in driving the driven wheel, finishing the step started by the driving wheel. Indeed, it drives the driven wheel by lifting the jumper and by constraining the spring member until the top of the jumper located between the inclined planes passes between two teeth or branches following. Under the action of the spring member, the jumper then pushes the driven wheel to complete the angular step of driving the driven wheel.

Le couple de maintien du mobile d'affichage généré par l'organe ressort est d'autant plus grand que le moment d'inertie du mobile d'affichage est grand. En effet, l'organe ressort doit pouvoir maintenir le mobile d'affichage en cas d'accélérations importantes, par exemple lors de chocs.The holding torque of the display mobile generated by the spring member is greater than the moment of inertia of the display mobile is large. Indeed, the spring member must be able to maintain the mobile display in case of significant acceleration, for example during shocks.

Dans certains cas, si la raideur et/ou le déplacement angulaire de l'organe ressort est trop importante, le couple prélevé sur le mouvement pour soulever le sautoir lors de la première phase de l'entraînement de la roue menée peut induire une perte d'amplitude du balancier inacceptable, voire stopper le mouvement.In some cases, if the stiffness and / or the angular displacement of the spring member is too great, the torque taken on the movement to lift the jumper during the first phase of driving the driven wheel may induce a loss of torque. amplitude of the pendulum unacceptable, even stop the movement.

Il n'est pas toujours possible de réduire la raideur et/ou le déplacement angulaire de l'organe ressort sans porter préjudice à la sécurité du positionnement du mobile d'affichage. La présente invention a pour but de proposer un système d'entraînement et de positionnement d'un mobile, notamment d'un mobile d'affichage, combinant à la fois une très bonne sécurité du positionnement et limitant les perturbations de l'organe régulateur lors du passage d'une position indexée à une autre.It is not always possible to reduce the stiffness and / or the angular displacement of the spring member without prejudicing the positioning security of the display unit. The object of the present invention is to propose a drive and positioning system for a mobile, in particular a display mobile, combining at the same time a very good positioning security and limiting the disturbances of the regulating member when from one indexed position to another.

Divulguation de l'inventionDisclosure of the invention

De façon plus précise, l'invention concerne un système d'entraînement et de positionnement d'un mobile d'affichage, comprenant :

  • une roue menante comportant n organes d'entraînement,
  • une roue menée destinée à être entraînée par les n organes d'entraînement,
  • un sautoir comprenant une zone de positionnement et un organe ressort agencé pour presser ladite zone de positionnement contre la roue menée et la positionner angulairement.
More specifically, the invention relates to a system for driving and positioning a display mobile, comprising:
  • a driving wheel having n drive members,
  • a driven wheel intended to be driven by the n drive members,
  • a jumper comprising a positioning zone and a spring member arranged to press said positioning zone against the driven wheel and position it angularly.

Selon l'invention, le système d'entraînement et de positionnement comprend une came de synchronisation entraînée par la roue menante et un palpeur comprenant une extrémité maintenue au contact de la périphérie de la came de synchronisation et coopérant avec le sautoir, ladite came de synchronisation et ledit palpeur étant agencés de manière à exercer sur le sautoir, au moins lorsque les n organes d'entraînement coopèrent avec la roue menée, une force dont le moment par rapport à l'axe du sautoir s'oppose au moment induit par la force exercée par le ressort par rapport audit axe du sautoir.According to the invention, the drive and positioning system comprises a synchronization cam driven by the driving wheel and a probe comprising an end held in contact with the periphery of the synchronization cam and cooperating with the jumper, said synchronization cam. and said probe being arranged to exert on the jumper, at least when the n drive members cooperate with the driven wheel, a force whose moment relative to the axis of the jumper opposes the moment induced by the force exerted by the spring with respect to said axis of the jumper.

L'invention concerne également un sautoir comprenant un corps, une zone de positionnement et un organe ressort destiné à presser ladite zone de positionnement contre un mobile, caractérisé en ce qu'il comprend un palpeur solidaire dudit corps.The invention also relates to a jumper comprising a body, a positioning zone and a spring member for pressing said positioning zone against a mobile, characterized in that it comprises a feeler integral with said body.

Brève description des dessinsBrief description of the drawings

D'autres détails de l'invention apparaîtront plus clairement à la lecture de la description qui suit, faite en référence au dessin annexé dans lequel les figures 1 et 2 proposent deux vues d'un système d'entraînement et de positionnement selon l'invention, dans deux positions différentes.Other details of the invention will appear more clearly on reading the description which follows, made with reference to the appended drawing in which the figures 1 and 2 propose two views of a drive and positioning system according to the invention, in two different positions.

Mode de réalisation de l'inventionEmbodiment of the invention

Les figures représentent un système d'entraînement et de positionnement d'un mobile d'affichage selon l'invention. Seuls les éléments nécessaires à la compréhension de l'invention ont été représentés. Ainsi, on a une roue menante 10, destinée à être entraînée par un mouvement horloger et destinée à entraîner une roue menée 12. A titre d'exemple, cette roue menante 10 peut être une roue 24h, effectuant un tour par 24h, et comprenant un organe d'entraînement 14 agencé pour entraîner la roue menée 12, en l'espèce une roue de 31, comportant 31 dents, une fois par jour. Dans l'exemple, la roue menante 10 comprend une dent complète formant l'organe d'entraînement 14, les autres dents étant tronquées.The figures show a drive and positioning system of a display unit according to the invention. Only the elements necessary for the understanding of the invention have been represented. Thus, there is a driving wheel 10, intended to be driven by a watch movement and intended to drive a driven wheel 12. For example, this driving wheel 10 may be a wheel 24, making a turn per 24h, and comprising a drive member 14 arranged to drive the driven wheel 12, in this case a wheel 31, 31 teeth, once a day. In the example, the driving wheel 10 comprises a complete tooth forming the drive member 14, the other teeth being truncated.

La roue menée 12 peut porter solidairement un disque d'affichage, non représenté. L'homme du métier peut évidemment adapter aisément le système à un affichage de quantième de type grande date avec une roue menée 12 à 10 positions pour l'indication des unités, entraînant une roue des dizaines. L'homme du métier pourra encore adapter l'enseignement de la présente description à un affichage d'une autre information.The driven wheel 12 may integrally carry a display disc, not shown. The person skilled in the art can of course easily adapt the system to a date display of the big date type with a driven wheel 12 to 10 positions for the indication of the units, resulting in a tens wheel. Those skilled in the art may further adapt the teaching of the present description to a display of another information.

Pour positionner angulairement la roue menée 12 et participer à son entraînement, le système selon l'invention comprend un sautoir 16. Ce dernier présente une zone de positionnement, pouvant prendre la forme de deux plans inclinés 18 et un organe ressort 20 agencé pour presser la zone de positionnement 18 contre la roue menée 12. Dans le mode de réalisation proposé, la zone de positionnement 18 est réalisée par des plans inclinés formés par une pierre 21 agencée sur un corps 22 réalisé dans un autre matériau. La zone de positionnement pourrait aussi être réalisée par un corps cylindrique ou semi-cylindrique. La pierre pourrait aussi être remplacée par une partie intégrée au sautoir (pièce d'un seul tenant).To angularly position the driven wheel 12 and participate in its training, the system according to the invention comprises a jumper 16. This last has a positioning zone, which can take the form of two inclined planes 18 and a spring member 20 arranged to press the positioning zone 18 against the driven wheel 12. In the proposed embodiment, the positioning zone 18 is made by inclined planes formed by a stone 21 arranged on a body 22 made of another material. The positioning zone could also be made by a cylindrical or semi-cylindrical body. The stone could also be replaced by a part integrated in the saltire (piece in one piece).

Selon l'invention, le système d'entraînement et de positionnement comprend encore une came de synchronisation 24 entraînée par la roue menante 10 et un palpeur 26 comprenant une extrémité maintenue au contact de la périphérie de la came et coopérant avec le sautoir 16. Comme on le comprendra mieux par la suite, la came de synchronisation 24 et le palpeur 26 sont agencés de manière à exercer sur le sautoir 16, au moins lorsque l'organe d'entraînement 14 coopère avec la roue menée 12, une force dont le moment par rapport à l'axe du sautoir s'oppose au moment induit par la force exercée par le ressort, par rapport audit axe du sautoir.According to the invention, the drive and positioning system further comprises a synchronization cam 24 driven by the driving wheel 10 and a probe 26 comprising an end held in contact with the periphery of the cam and cooperating with the jumper 16. As it will be better understood subsequently, the synchronization cam 24 and the feeler 26 are arranged to exert on the jumper 16, at least when the drive member 14 cooperates with the driven wheel 12, a force whose moment relative to the axis of the jumper opposes the moment induced by the force exerted by the spring, with respect to said axis of the jumper.

Plus particulièrement au mode de réalisation illustré sur les dessins, le sautoir 16 est monté pivotant sur un axe de pivotement. Le palpeur 26 est monté solidaire (rapporté ou d'une pièce) sur l'axe de pivotement. Le palpeur 26 comprend une base 26a percée d'une ouverture pour le montage sur l'axe. De la base 26a, un levier 26b s'étend en direction de la came et son extrémité est au contact de la périphérie de la came de synchronisation 24.More particularly to the embodiment illustrated in the drawings, the jumper 16 is pivotally mounted on a pivot axis. The probe 26 is mounted integral (reported or in one piece) on the pivot axis. The probe 26 comprises a base 26a pierced with an opening for mounting on the axis. From the base 26a, a lever 26b extends in the direction of the cam and its end is in contact with the periphery of the synchronization cam 24.

Dans une variante non représentée, on pourrait également utiliser un palpeur monté sur un axe distinct, dont une première extrémité serait maintenue en appui sur la came et dont une autre extrémité exercerait un appui sur le sautoir 16.In a variant not shown, it could also use a probe mounted on a separate axis, a first end would be held in abutment on the cam and another end would exert a bearing on the jumper 16.

Le levier 26b peut être rigide ou déformable élastiquement. Sur les figures, on voit que, à la jonction entre le levier 26b et la base 26a, cette dernière comporte une fente 26c prolongeant le bord du levier 26b et qui confère au levier 26b une déformabilité supplémentaire dans le plan du système. La base 26a du palpeur 26 est solidaire du corps 22 du sautoir 16. Par exemple, une goupille 28 relie ces deux pièces rigidement. Dans le cas où le palpeur 26 est déformable élastiquement, il exerce sur le sautoir 16, pour une déformation donnée, une force dont le moment par rapport à l'axe du sautoir est supérieur à celui induit par la force exercée par l'organe ressort 20 sur le sautoir 16 et selon l'axe de rotation du sautoir, afin qu'une action de la came sur le palpeur 26 entraîne un déplacement du sautoir 16 et une déformation de l'organe ressort 20.The lever 26b can be rigid or elastically deformable. In the figures, it can be seen that at the junction between the lever 26b and the base 26a, the latter comprises a slot 26c extending the edge of the lever 26b and which gives the lever 26b additional deformability in the plane of the system. The base 26a of the probe 26 is integral with the body 22 of the jumper 16. For example, a pin 28 connects these two parts rigidly. In the case where the feeler 26 is elastically deformable, it exerts on the jumper 16, for a given deformation, a force whose moment relative to the jumper axis is greater than that induced by the force exerted by the spring member. 20 on the jumper 16 and the axis of rotation of the jumper, so that an action of the cam on the probe 26 causes a displacement of the jumper 16 and a deformation of the spring member 20.

Dans une variante avantageuse, le corps du sautoir 22, l'organe ressort 20 et le palpeur peuvent être réalisés d'une pièce, par exemple avec des techniques de gravure mononiveau ou multiniveaux.In an advantageous variant, the body of the jumper 22, the spring member 20 and the probe can be made in one piece, for example with single-level or multilevel etching techniques.

La came de synchronisation 24 est montée coaxiale avec la roue menante 10. Bien que la solution illustrée soit préférable, on pourrait envisager, pour des questions de position ou d'encombrement du levier 26b, de disposer la came 24 sur un autre mobile, engrenant directement ou indirectement avec la roue menante 10.The synchronization cam 24 is mounted coaxially with the driving wheel 10. Although the illustrated solution is preferable, it could be envisaged, for questions of position or size of the lever 26b, to arrange the cam 24 on another mobile, meshing directly or indirectly with the driving wheel 10.

La came de synchronisation 24 peut être solidaire de la roue menante 10. De préférence, elle est montée folle sur l'axe de la roue menante 10 et entraînée en rotation par celle-ci au moyen d'un doigt 30 solidaire de la roue menante 10 et qui prend place dans une rainure 32 concentrique à l'axe de la roue menante 10, ménagée dans la came 24. Grâce à cette construction, comme on le comprendra ci-après, lors du passage du sautoir 16, l'appui du palpeur 26 sur la came 24 ne gêne pas la deuxième partie du saut, sous l'action de l'organe ressort 20, la came 24 pouvant prendre de l'avance, grâce au jeu entre le doigt 30 et la rainure 32. Une construction inverse pourrait également être envisagée, dans laquelle la roue menante 10 comporte la rainure, concentrique à l'axe de la came de synchronisation. Le doigt est solidaire de la came de synchronisation et prend place dans la rainure.The synchronization cam 24 may be integral with the driving wheel 10. Preferably, it is mounted idle on the axis of the driving wheel 10 and rotated by it by means of a finger 30 secured to the driving wheel 10 and which takes place in a groove 32 concentric to the axis of the driving wheel 10, formed in the cam 24. With this construction, as will be understood below, during the passage of the jumper 16, the support of the feeler 26 on the cam 24 does not interfere with the second part of the jump, under the action of the spring member 20, the cam 24 can take the lead, thanks to the clearance between the finger 30 and the groove 32. A construction Inverse could also be envisaged, in which the driving wheel 10 comprises the groove, concentric with the axis of the synchronization cam. The finger is secured to the synchronization cam and takes place in the groove.

Selon l'exemple, la came de synchronisation 24 définit une portion circulaire de repos 24a présentant un premier rayon, et une portion active 24b présentant un rayon plus grand que le premier rayon. De préférence, le premier rayon est dimensionné en fonction de la longueur du palpeur 26 et de la position respective, de la came 24 et du palpeur 26, de manière à ce que le sautoir 16 soit uniquement soumis à l'action de l'organe ressort 20 lorsque le palpeur 26 est au contact de la portion circulaire de repos 24a.According to the example, the synchronization cam 24 defines a circular rest portion 24a having a first radius, and an active portion 24b having a radius greater than the first radius. Preferably, the first radius is sized according to the length of the feeler 26 and the respective position, the cam 24 and the feeler 26, so that that the jumper 16 is only subjected to the action of the spring member 20 when the probe 26 is in contact with the circular portion of rest 24a.

La portion active 24b présente un rayon variable, augmentant puis diminuant. La portion active 24b est dimensionnée de manière à ce que le sautoir 16 soit soumis à l'action combinée de l'organe ressort 20 et du palpeur 26, lorsque ce dernier est au contact d'une portion active 24b. Le rayon de la portion active est limité de manière à ce que le déplacement induit sur le sautoir 16 est inférieur à la pénétration du sautoir 16 entre les dents de la roue menée 12. En d'autres termes, le sautoir 16 reste en contact de la roue menée 12, pour la positionner et participer à son entraînement.The active portion 24b has a variable radius, increasing and decreasing. The active portion 24b is dimensioned so that the jumper 16 is subjected to the combined action of the spring member 20 and the probe 26, when the latter is in contact with an active portion 24b. The radius of the active portion is limited so that the displacement induced on the jumper 16 is less than the penetration of the jumper 16 between the teeth of the driven wheel 12. In other words, the jumper 16 remains in contact with the driven wheel 12, to position and participate in its training.

La came de synchronisation 24 est positionnée angulairement sur la roue menante 10, de manière à ce que le palpeur 26 soit situé au sommet de la came 24, sensiblement lorsque le bec du sautoir 16, situé entre les plans inclinés 18, passe la pointe d'une dent de la roue menée 12.The synchronization cam 24 is positioned angularly on the driving wheel 10, so that the feeler 26 is located at the top of the cam 24, substantially when the spout of the jumper 16, located between the inclined planes 18, passes the spike. a tooth of the driven wheel 12.

Ainsi, en fonctionnement, pendant l'essentiel du cycle d'entraînement de la roue menée 12, c'est-à-dire dans l'exemple pour une rotation d'environ 300° de la roue menante 10, le palpeur 26 est en appui sur la portion de repos 24a de la came. La roue menée 12 et le mobile d'affichage qu'elle porte sont positionnés par le sautoir 16 et son organe ressort 20 (Fig. 1).Thus, during operation, during most of the driving cycle of the driven wheel 12, that is to say in the example for a rotation of about 300 ° of the driving wheel 10, the probe 26 is in resting on the rest portion 24a of the cam. The driven wheel 12 and the mobile display it carries are positioned by the jumper 16 and its spring member 20 ( Fig. 1 ).

La came 24 pivote en étant poussée par le doigt 30 qui appuie sur une première extrémité de la rainure 32. Lorsque le palpeur 26 commence à monter sur la portion active 24b de la came, il exerce sur le sautoir 16 une force dont le moment par rapport à l'axe de rotation du sautoir tend à s'opposer au moment induit par la force exercée par l'organe ressort 20, par rapport audit axe de rotation du sautoir.The cam 24 pivots by being pushed by the finger 30 which bears on a first end of the groove 32. When the probe 26 begins to mount on the active portion 24b of the cam, it exerts on the jumper 16 a force whose moment by relative to the axis of rotation of the jumper tends to oppose the moment induced by the force exerted by the spring member 20 relative to said axis of rotation of the jumper.

La figure 2 illustre le moment du passage du sautoir 16 à l'intervalle suivant. A ce moment, le palpeur 26 est en appui sur le sommet de la portion active 24b de la came de synchronisation 24. La force appliquée sur le sautoir 16 par le palpeur 26 est maximale, ce qui, par conséquent, entraîne que la force appliquée par le sautoir 16 sur la roue menée 12, est minimale. Le couple que la roue menante 10 doit appliquer pour entraîner la rotation de la roue menée 12, est donc réduit.The figure 2 illustrates the moment of passage of jumper 16 to the next interval. At this moment, the feeler 26 is resting on the top of the active portion 24b of the synchronization cam 24. The force applied to the jumper 16 by the probe 26 is maximum, which consequently results in the applied force by the jumper 16 on the driven wheel 12, is minimal. The torque that the driving wheel 10 must apply to cause the rotation of the driven wheel 12, is reduced.

Après le saut du sautoir 16, le palpeur 26 appuie sur la partie de la portion active 24b dont le rayon diminue (en prenant le sens de rotation de la came comme référence) et fait avancer la came jusqu'à ce que le doigt 30 s'appuie sur la deuxième extrémité de la rainure 32. Le palpeur 26 retombe donc très rapidement sur la portion de repos 24a, ce qui permet au sautoir 16 d'avoir toute sa force pour effectuer l'entraînement de la roue menée 12, après le saut de la dent sur le sautoir 16.After jumping the jumper 16, the probe 26 presses the portion of the active portion 24b whose radius decreases (taking the direction of rotation of the cam as reference) and advances the cam until the finger 30 s 'presses on the second end of the groove 32. The sensor 26 therefore falls very quickly on the rest portion 24a, which allows the jumper 16 to have all its force to carry the drive wheel 12, after the jump of the tooth on the jumper 16.

En examinant le couple de rotation prélevé par la roue menante 10 sur le mouvement, on constate que le déplacement du palpeur 26 sur la portion active 24b, induit un prélèvement de couple progressif qui intervient plus tôt dans la rotation de la roue menante 10, qu'un système de l'art antérieur avec un sautoir 16 traditionnel. Cependant, de manière très avantageuse, on constate également que le couple maximal prélevé au moment du passage du sautoir 16 sur la roue menée 12, est réduit, ce qui limite la perturbation subie par l'organe réglant du mouvement lors de ce passage.By examining the rotation torque taken by the driving wheel 10 on the movement, it can be seen that the displacement of the feeler 26 on the active portion 24b induces a progressive torque pickup which occurs earlier in the rotation of the driving wheel 10, which a system of the prior art with a traditional jumper 16. However, very advantageously, it is also found that the maximum torque taken at the time of passage of the jumper 16 on the driven wheel 12 is reduced, which limits the disturbance experienced by the regulating member of the movement during this passage.

Ainsi, grâce au système d'entraînement et de positionnement selon l'invention, le couple maximal nécessaire à l'entraînement de la roue menée 12, est réduit, sans diminuer la force de l'organe ressort 20 du sautoir 16, ce qui permet de conserver une bonne sécurité.Thus, thanks to the drive and positioning system according to the invention, the maximum torque required to drive the driven wheel 12 is reduced, without decreasing the force of the spring member 20 of the jumper 16, which allows to maintain a good security.

Si l'exemple ci-dessus se rapporte à un entraînement avec une roue 24h, entraînant une fois par jour une roue de 31, l'homme du métier pourra l'adapter avec une roue menante 10 entraînant la roue menée 12 plusieurs fois par tour et comportant, pour ce faire, n organes d'entraînement 14 (n ≥2). La came de synchronisation 24 peut alors être disposée sur un mobile entraîné par la roue menante 10, avec un rapport d'engrènement de n, c'est-à-dire que le mobile tournera n fois plus vite que la roue menante 10. La came de synchronisation 24 peut aussi être disposée coaxialement à la roue menante 10 et comporter n portions de repos et n portions actives.If the example above relates to a drive with a wheel 24, driving once a day a wheel of 31, the skilled person can adapt it with a driving wheel 10 driving the driven wheel 12 several times per lap and having, for this purpose, n drive members 14 (n ≥2). The synchronization cam 24 can then be arranged on a mobile driven by the driving wheel 10, with a meshing ratio of n, that is to say that the mobile will rotate n times faster than the driving wheel 10. The synchronization cam 24 may also be arranged coaxially with the driving wheel 10 and have n rest portions and n active portions.

Claims (11)

Système d'entraînement et de positionnement d'un mobile d'affichage, comprenant : - une roue menante (10) comportant n organes d'entraînement (14), - une roue menée (12) destinée à être entraînée par les n organes d'entraînement (14), - un sautoir (16) comprenant une zone de positionnement (18) et un organe ressort (20) agencé pour presser la zone de positionnement (18) contre la roue menée (12) et la positionner angulairement, caractérisé en ce qu'il comprend une came de synchronisation (24) entraînée par la roue menante (10) et un palpeur (26) comprenant une extrémité maintenue au contact de la périphérie de la came de synchronisation (24) et coopérant avec le sautoir (16), ladite came de synchronisation (24) et ledit palpeur (26) étant agencés de manière à exercer sur le sautoir (16), au moins lorsque les n organes d'entraînement (14) coopèrent avec la roue menée (12), une force dont le moment par rapport à l'axe de rotation du sautoir s'oppose au moment induit par la force exercée par le ressort, par rapport audit axe de rotation du sautoir.A display mobile positioning and positioning system, comprising: a driving wheel (10) comprising n drive members (14), a driven wheel (12) intended to be driven by the n drive members (14), - A jumper (16) comprising a positioning zone (18) and a spring member (20) arranged to press the positioning zone (18) against the driven wheel (12) and position it angularly, characterized in that it comprises a synchronization cam (24) driven by the driving wheel (10) and a probe (26) comprising an end held in contact with the periphery of the synchronization cam (24) and cooperating with the jumper (16), said synchronizing cam (24) and said feeler (26) being arranged to exert on the jumper (16), at least when the n drive members (14) cooperate with the driven wheel (12) , a force whose moment relative to the axis of rotation of the jumper opposes the moment induced by the force exerted by the spring, with respect to said axis of rotation of the jumper. Système d'entraînement et de positionnement selon la revendication 1, caractérisé en ce que ledit palpeur (26) est solidaire du sautoir (16).Drive and positioning system according to claim 1, characterized in that said feeler (26) is integral with the jumper (16). Système d'entraînement et de positionnement selon la revendication 2, caractérisé en ce que ledit sautoir (16) est monté solidaire d'un axe de pivotement et en ce que le palpeur (26) est solidaire dudit axe de pivotement.Drive and positioning system according to claim 2, characterized in that said jumper (16) is mounted integral with a pivot axis and in that the feeler (26) is integral with said pivot axis. Système d'entraînement et de positionnement selon l'une des revendications précédentes, caractérisé en ce que la came de synchronisation (24) est montée coaxiale avec la roue menante (10).Drive and positioning system according to one of the preceding claims, characterized in that the synchronization cam (24) is mounted coaxially with the drive wheel (10). Système d'entraînement et de positionnement selon la revendication 4, caractérisé en ce que la came de synchronisation (24) est montée folle sur l'axe de la roue menante (10).Drive and positioning system according to claim 4, characterized in that the synchronization cam (24) is mounted idle on the axis of the driving wheel (10). Système d'entraînement et de positionnement selon la revendication 5, caractérisé en ce que la came de synchronisation (24) comporte une rainure (32) concentrique à l'axe de la roue menante (10), dans laquelle prend place un doigt (30) solidaire de la roue menante (10).Drive and positioning system according to claim 5, characterized in that the synchronization cam (24) has a groove (32) concentric with the axis of the driving wheel (10), in which a finger (30) is located. ) integral with the driving wheel (10). Système d'entraînement et de positionnement selon la revendication 5, caractérisé en ce que la roue menante (10) comporte une rainure (32) concentrique à l'axe de la came de synchronisation (24), dans laquelle prend place un doigt (30) solidaire de la came de synchronisation (24).Drive and positioning system according to claim 5, characterized in that the drive wheel (10) has a groove (32) concentric with the axis of the synchronization cam (24), in which a finger (30) is located. ) integral with the synchronization cam (24). Système d'entraînement et de positionnement selon l'une des revendications précédentes , caractérisé en ce que la came de synchronisation (24) définit n portions circulaires de repos présentant un premier rayon, et n portions actives présentant un rayon plus grand que le premier rayon, le sautoir (16) étant au moins soumis à l'action de l'organe ressort (20) lorsque le palpeur (26) est au contact d'une portion circulaire de repos, le sautoir (16) étant soumis à l'action combinée de l'organe ressort (20) et du palpeur (26), lorsque ce dernier est au contact d'une portion active.Drive and positioning system according to one of the preceding claims, characterized in that the synchronization cam (24) defines n circular resting portions having a first radius, and n active portions having a radius greater than the first radius , the jumper (16) being at least subjected to the action of the spring member (20) when the feeler (26) is in contact with a circular rest portion, the jumper (16) being subjected to the action combined spring member (20) and the probe (26), when the latter is in contact with an active portion. Système d'entraînement et de positionnement selon l'une des revendications précédentes, caractérisé en ce que ledit palpeur (26) est rigide.Drive and positioning system according to one of the preceding claims, characterized in that said probe (26) is rigid. Système d'entraînement et de positionnement selon l'une des revendications 1 à 8, caractérisé en ce que ledit palpeur (26) est déformable élastiquement.Drive and positioning system according to one of claims 1 to 8, characterized in that said sensor (26) is elastically deformable. Sautoir (16) comprenant un corps (22), une zone de positionnement (18) et un organe ressort (20) destiné à presser ladite zone de positionnement (18) contre un mobile, caractérisé en ce qu'il comprend un palpeur (26) solidaire dudit corps (22).Necklace (16) comprising a body (22), a positioning zone (18) and a spring member (20) intended to press said positioning zone (18) against a mobile, characterized in that it comprises a feeler (26) ) integral with said body (22).
EP17195976.0A 2016-10-24 2017-10-11 Drive and positioning system and jumper for implementing said system Active EP3428738B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH01416/16A CH713066A2 (en) 2016-10-24 2016-10-24 Driving and positioning system and jumper for the implementation of said system.

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EP3428738A1 true EP3428738A1 (en) 2019-01-16
EP3428738B1 EP3428738B1 (en) 2022-02-16

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Application Number Title Priority Date Filing Date
EP17195976.0A Active EP3428738B1 (en) 2016-10-24 2017-10-11 Drive and positioning system and jumper for implementing said system

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EP (1) EP3428738B1 (en)
CH (1) CH713066A2 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH470703A (en) * 1965-06-14 1967-01-31 Montres Perret Et Berthoud Sa Timepiece comprising an instant-jump date mechanism
CH545500A (en) * 1970-06-29 1974-01-31 Omega Brandt & Freres Sa Louis Calendar watch

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH1635569A4 (en) * 1969-11-03 1971-08-13

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH470703A (en) * 1965-06-14 1967-01-31 Montres Perret Et Berthoud Sa Timepiece comprising an instant-jump date mechanism
CH545500A (en) * 1970-06-29 1974-01-31 Omega Brandt & Freres Sa Louis Calendar watch

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EP3428738B1 (en) 2022-02-16
CH713066A2 (en) 2018-04-30

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