EP0654718A1 - Driving mechanism for the hands of a timepiece - Google Patents

Driving mechanism for the hands of a timepiece Download PDF

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Publication number
EP0654718A1
EP0654718A1 EP94117910A EP94117910A EP0654718A1 EP 0654718 A1 EP0654718 A1 EP 0654718A1 EP 94117910 A EP94117910 A EP 94117910A EP 94117910 A EP94117910 A EP 94117910A EP 0654718 A1 EP0654718 A1 EP 0654718A1
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EP
European Patent Office
Prior art keywords
bridge
plate
mobile
mechanism according
mobiles
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Granted
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EP94117910A
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German (de)
French (fr)
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EP0654718B1 (en
Inventor
Gabriel Cart
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ISA AG Arch
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Fabrique dEbauches de Sonceboz SA
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    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
    • G04C3/14—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means incorporating a stepping motor
    • G04C3/146—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means incorporating a stepping motor incorporating two or more stepping motors or rotors
    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
    • G04C3/008—Mounting, assembling of components

Definitions

  • the present invention relates to a mechanism for driving the hands of a timepiece comprising, disposed between a plate and a bridge, a first rotor-motor driving a board of a first intermediate mobile, said first intermediate mobile carrying a pinion driving a first center mobile, the latter comprising a board meshing on said pinion and a barrel on which is fitted a needle displaying a first time unit, and a second rotor-motor driving a board of a second intermediate mobile, said second intermediate mobile carrying a pinion driving a second central mobile, coaxial with the first, this second central mobile comprising a board meshing on said pinion and a shaft passing through the barrel, shaft on which is fitted a needle displaying a second unit of time.
  • the mechanism of the present invention in addition to meeting the definition generic of the first paragraph above, is characterized in that the first and second intermediate mobiles are identical and interchangeable and that they are arranged upside down between the plate and the bridge. Other original characteristics will appear on reading the following text.
  • FIG. 1 is a plan view of the mechanism of the invention.
  • a motor 34 equipped with two rotor-motors 5 and 6 and a single stator 12.
  • the motor is completed by a core 35 and a single coil 25.
  • This motor is nothing other than 'an advanced version of that described in patent CH-B-675 940 in which the rotors are capable of driving two needles independently of one another and whose axes are coaxial.
  • by acting on the shape of the notches 13a, 13b and 14a, 14b for example, it is possible to selectively control the rotors 6 and 5 by means of pulses of different types, for example pulses of same duration but with different hash rates.
  • pulses of different types for example pulses of same duration but with different hash rates.
  • a coil is applied to the coil 25 when full, the two hands progress by one step at the same time, whereas if a chopped pulse is applied, only one hand, the minute hand, advances by one step.
  • the present invention is not limited to the motor described above and it will be understood that the use of two independent motors each driving a needle is also possible, such as for example the use of the arrangement described in the EP patent -B-0 393 605 cited above.
  • FIG. 1 shows the motor 34, its two rotor-motors 5 and 6 and a gear mechanism which will now be explained by means of section II-II shown in FIG. 2.
  • the cog is located between a plate 7 and a cog bridge 8 not shown in FIG. 1.
  • the mechanism comprises a first motor rotor 6 equipped with a magnet 32 and a pinion 30.
  • This first motor rotor 6 drives by its pinion 30 a board 15 of a first intermediate mobile 4.
  • This first intermediate mobile 4 carries a pinion 16 which drives a first mobile of center 2 by a board 17 which is provided with this first mobile of center 2.
  • the latter also includes a barrel 18 on which is fitted a hand 11 which displays a first unit of time.
  • FIGS. 1 and 2 also comprises a second motor rotor 5 fitted with a magnet 33 and a pinion 31.
  • This second motor rotor 5 drives by its pinion 31 a board 18 of a second intermediate mobile 3
  • This second intermediate mobile 3 carries a pinion 19 which drives a second mobile of center 1.
  • FIG. 2 clearly shows that the second mobile of center 1 is coaxial with the first mobile of center 2.
  • This second mobile of center 1 comprises a board 20 engaged on the pinion 19 of the second intermediate mobile 3 and also has a shaft 21 passing through the barrel 18. On this shaft 21 is fitted a hand 10 which displays a second unit of time.
  • FIG. 2 clearly shows that the first and second intermediate mobiles 4 and 3 are identical, therefore interchangeable and that they are arranged head to tail between the plate 7 and the bridge cog train 8.
  • the similarity of the intermediate mobiles 4 and 3 can lead to that of the rotor-motors 6 and 5 and that of the central boards 17 and 20.
  • the mechanism of the invention is greatly simplified by the use of two identical rotor-motors, of two identical intermediate mobiles and two center wheels whose axes, barrel and shaft are different, but whose boards are identical.
  • the mechanism has a minimum thickness because the boards 17 and 20 of the mobiles with center 2 and 1 can be brought closer to the median plane 22, which leaves a maximum of space for the stator 12 of the motor disposed between the board 17 and the plate 7.
  • the arrangement which has just been described has another advantage. Indeed, the boards 15 and 18 of the intermediate mobiles being in the median plane 22, the boards 17 and 20 of the first and second mobiles of center 2 and 1 can be arranged on either side of the median plane 22 and equal distances from it, as shown in FIG. 2.
  • This particular arrangement makes it possible to return the two mobiles with center 2 and 1 and the two intermediate mobiles 4 and 3 to arrive at the situation illustrated in FIG. 3 where the needles 10 and 11 are located on the gear train 8.
  • This new situation obtained without difficulty and by means of the same mobiles composing the mechanism, is that of a mechanism intended to be assembled in a monobloc watch with a bottom made of one piece with the middle part, such as a plastic case for example.
  • the situation shown in Figure 2 with the hands 10 and 11 emerging from the plate side 7 is that suitable for an ordinary movement, delivered for itself and intended to be mounted by the bottom of the timepiece.
  • the mechanism described above can be used in any analog timepiece whose hands are controlled independently of one another by an electronic circuit. More particularly, its use is well suited in a chronograph watch or an alarm watch with two hands capable of displaying, in response to the actuation of a control device, either the time of day or the alarm time indicating the hour and the minute, that is a timed time indicating the minute and the second.
  • a chronograph watch is described, for the control part, in patent application CH 01497 / 93-2 filed on May 17, 1993 belonging to the same owner as that of the present invention.

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

Abstract

The mechanism for driving the hands (10, 11) comprises, for each hand, a motive rotor (5, 6) driving an intermediate runner (3, 4), the latter in turn driving a centre runner (1, 2). At least, the intermediate runners (3, 4) are identical and interchangeable and are mounted head-to-tail between a plate (7) and a wheelwork bridge (8). <IMAGE>

Description

La présente invention concerne un mécanisme d'entraînement des aiguilles d'une pièce d'horlogerie comportant, disposés entre une platine et un pont, un premier rotor-moteur entraînant une planche d'un premier mobile intermédiaire, ledit premier mobile intermédiaire portant un pignon entraînant un premier mobile de centre, ce dernier comportant une planche engrénant sur ledit pignon et un canon sur lequel est emmanchée une aiguille affichant une première unité de temps, et un second rotor-moteur entraînant une planche d'un second mobile intermédiaire, ledit second mobile intermédiaire portant un pignon entraînant un second mobile de centre, coaxial au premier, ce second mobile de centre comportant une planche engrénant sur ledit pignon et un arbre traversant le canon, arbre sur lequel est emmanchée une aiguille affichant une seconde unité de temps.The present invention relates to a mechanism for driving the hands of a timepiece comprising, disposed between a plate and a bridge, a first rotor-motor driving a board of a first intermediate mobile, said first intermediate mobile carrying a pinion driving a first center mobile, the latter comprising a board meshing on said pinion and a barrel on which is fitted a needle displaying a first time unit, and a second rotor-motor driving a board of a second intermediate mobile, said second intermediate mobile carrying a pinion driving a second central mobile, coaxial with the first, this second central mobile comprising a board meshing on said pinion and a shaft passing through the barrel, shaft on which is fitted a needle displaying a second unit of time.

Le document EP-B-0 393 605 décrit déjà une pièce d'horlogerie dont chacune des aiguilles est entraînée par un rotor-moteur. Dans ce document, chaque pignon de rotor est en prise avec une roue dentée, ces roues étant montées coaxialement l'une à l'autre et de part et d'autre d'une platine. Chacune des roues commande directement une aiguille indiquant une unité de temps. Cette construction est relativement simple car elle ne fait pas appel à un mobile intermédiaire placé entre le rotor-moteur et le mobile de centre. Elle présente toutefois l'inconvénient d'être génératrice de bruit provoqué par le choc des deux dents du pignon moteur sur la denture de la roue de centre. De plus, tout le mécanisme étant monté sur le stator renforcé des moteurs, il a été nécessaire de prévoir un tube pour supporter les mobiles de centre.Document EP-B-0 393 605 already describes a timepiece each of whose hands is driven by a rotor-motor. In this document, each rotor pinion is engaged with a toothed wheel, these wheels being mounted coaxially with one another and on either side of a plate. Each of the wheels directly controls a hand indicating a unit of time. This construction is relatively simple because it does not use an intermediate mobile placed between the rotor-motor and the center mobile. However, it has the disadvantage of generating noise caused by the impact of the two teeth of the drive pinion on the teeth of the center wheel. In addition, the whole mechanism being mounted on the reinforced stator of the motors, it was necessary to provide a tube to support the center mobiles.

Pour éviter ces inconvénients, le mécanisme de la présente invention, en plus qu'il répond à la définition générique du premier paragraphe ci-dessus, est caractérisé en ce que les premier et second mobiles intermédiaires sont identiques et interchangeables et qu'ils sont disposés en tête-bêche entre la platine et le pont. D'autres caractéristiques originales apparaîtront à la lecture du texte qui suit.To avoid these drawbacks, the mechanism of the present invention, in addition to meeting the definition generic of the first paragraph above, is characterized in that the first and second intermediate mobiles are identical and interchangeable and that they are arranged upside down between the plate and the bridge. Other original characteristics will appear on reading the following text.

L'invention sera comprise maintenant à la lecture de la description suivante donnée à titre d'exemple, de deux formes possibles de mise en oeuvre. Cette description se réfère au dessin annexé dans lequel :

  • la figure 1 est une vue en plan du mécanisme de l'invention, vue sur laquelle les mobiles en cause n'ont été que symbolisés et où la platine et le pont ont été omis,
  • la figure 2 est une coupe selon la ligne II-II de la figure 1, coupe dans laquelle la platine, le pont et tous les mobiles ont été représentés dans leur intégralité, et dans laquelle les aiguilles sont disposées du côté de la platine, et
  • la figure 3 est une coupe semblable à celle de la figure 2 dans laquelle les aiguilles ont été disposées du côté du pont.
The invention will now be understood on reading the following description given by way of example, of two possible forms of implementation. This description refers to the attached drawing in which:
  • FIG. 1 is a plan view of the mechanism of the invention, a view in which the mobiles in question have only been symbolized and in which the plate and the bridge have been omitted,
  • FIG. 2 is a section along the line II-II in FIG. 1, section in which the plate, the bridge and all the mobiles have been shown in their entirety, and in which the needles are arranged on the side of the plate, and
  • Figure 3 is a section similar to that of Figure 2 in which the needles were arranged on the side of the bridge.

La figure 1 est une vue en plan du mécanisme de l'invention. Sur cette figure a été représenté un moteur 34 équipé de deux rotors-moteurs 5 et 6 et d'un stator unique 12. Le moteur est complété par un noyau 35 et une seule bobine 25. Ce moteur n'est rien d'autre qu'une exécution évoluée de celle décrite dans le brevet CH-B-675 940 dans laquelle les rotors sont aptes à entraîner deux aiguilles indépendamment l'une de l'autre et dont les axes sont coaxiaux. Comme l'explique le document cité, en agissant sur la forme des encoches 13a, 13b et 14a, 14b par exemple, il est possible de commander sélectivement les rotors 6 et 5 au moyen d'impulsions de types différents, par exemple des impulsions de même durée mais présentant des taux de hachage différents. Dans le cas présent, si l'on applique à la bobine 25 une impulsion pleine, les deux aiguilles progressent d'un pas en même temps, alors que si c'est une impulsion hachée qui est appliquée, seule une aiguille, celle des minutes, avance d'un pas.Figure 1 is a plan view of the mechanism of the invention. In this figure has been shown a motor 34 equipped with two rotor-motors 5 and 6 and a single stator 12. The motor is completed by a core 35 and a single coil 25. This motor is nothing other than 'an advanced version of that described in patent CH-B-675 940 in which the rotors are capable of driving two needles independently of one another and whose axes are coaxial. As explained in the cited document, by acting on the shape of the notches 13a, 13b and 14a, 14b for example, it is possible to selectively control the rotors 6 and 5 by means of pulses of different types, for example pulses of same duration but with different hash rates. In the present case, if a coil is applied to the coil 25 when full, the two hands progress by one step at the same time, whereas if a chopped pulse is applied, only one hand, the minute hand, advances by one step.

La présente invention n'est pas limitée au moteur décrit ci-dessus et l'on comprendra que l'emploi de deux moteurs indépendants entraînant chacun une aiguille est également possible, comme par exemple l'utilisation de l'arrangement décrit dans le brevet EP-B-0 393 605 cité plus haut.The present invention is not limited to the motor described above and it will be understood that the use of two independent motors each driving a needle is also possible, such as for example the use of the arrangement described in the EP patent -B-0 393 605 cited above.

Le mécanisme de l'invention est représenté schématiquement en figure 1 qui montre le moteur 34, ses deux rotors-moteurs 5 et 6 et un mécanisme de rouages qui va être expliqué maintenant au moyen de la coupe II-II représentée en figure 2. Le rouage est situé entre une platine 7 et un pont de rouage 8 non représentés sur la figure 1.The mechanism of the invention is shown diagrammatically in FIG. 1 which shows the motor 34, its two rotor-motors 5 and 6 and a gear mechanism which will now be explained by means of section II-II shown in FIG. 2. The cog is located between a plate 7 and a cog bridge 8 not shown in FIG. 1.

Comme on le voit sur la figure 1, et particulièrement mieux sur la figure 2, le mécanisme comporte un premier rotor-moteur 6 équipé d'un aimant 32 et d'un pignon 30. Ce premier rotor-moteur 6 entraîne par son pignon 30 une planche 15 d'un premier mobile intermédiaire 4. Ce premier mobile intermédiaire 4 porte un pignon 16 qui entraîne un premier mobile de centre 2 par une planche 17 dont est pourvu ce premier mobile de centre 2. Ce dernier comporte également un canon 18 sur lequel est emmanchée une aiguille 11 qui affiche une première unité de temps.As can be seen in FIG. 1, and particularly better in FIG. 2, the mechanism comprises a first motor rotor 6 equipped with a magnet 32 and a pinion 30. This first motor rotor 6 drives by its pinion 30 a board 15 of a first intermediate mobile 4. This first intermediate mobile 4 carries a pinion 16 which drives a first mobile of center 2 by a board 17 which is provided with this first mobile of center 2. The latter also includes a barrel 18 on which is fitted a hand 11 which displays a first unit of time.

Le mécanisme présenté aux figures 1 et 2 comporte encore un second rotor-moteur 5 équipé d'un aimant 33 et d'un pignon 31. Ce second rotor-moteur 5 entraîne par son pignon 31 une planche 18 d'un second mobile intermédiaire 3. Ce second mobile intermédiaire 3 porte un pignon 19 qui entraîne un second mobile de centre 1. La figure 2 montre clairement que le second mobile de centre 1 est coaxial au premier mobile de centre 2. Ce second mobile de centre 1 comporte une planche 20 en prise sur le pignon 19 du second mobile intermédiaire 3 et comporte encore un arbre 21 traversant le canon 18. Sur cet arbre 21 est emmanchée une aiguille 10 qui affiche une seconde unité de temps.The mechanism presented in FIGS. 1 and 2 also comprises a second motor rotor 5 fitted with a magnet 33 and a pinion 31. This second motor rotor 5 drives by its pinion 31 a board 18 of a second intermediate mobile 3 This second intermediate mobile 3 carries a pinion 19 which drives a second mobile of center 1. FIG. 2 clearly shows that the second mobile of center 1 is coaxial with the first mobile of center 2. This second mobile of center 1 comprises a board 20 engaged on the pinion 19 of the second intermediate mobile 3 and also has a shaft 21 passing through the barrel 18. On this shaft 21 is fitted a hand 10 which displays a second unit of time.

Selon une caractéristique essentielle de l'invention, la figure 2 montre à l'évidence que les premier et second mobiles intermédiaires 4 et 3 sont identiques, donc interchangeables et qu'ils sont disposés en tête-bêche entre la platine 7 et le pont de rouage 8. Ainsi est-il nécessaire de ne fabriquer qu'une sorte de mobile intermédiaire pour entraîner le premier mobile de centre 2 et le second mobile de centre 1, ce qui diminue le nombre de pièces différentes à fabriquer. Il suffit dès lors de disposer le pignon 16 du premier mobile intermédiaire 4 du côté de la platine 7 et le pignon 19 du second mobile intermédiaire du côté du pont 8 pour assurer un montage correct du mécanisme.According to an essential characteristic of the invention, FIG. 2 clearly shows that the first and second intermediate mobiles 4 and 3 are identical, therefore interchangeable and that they are arranged head to tail between the plate 7 and the bridge cog train 8. Thus it is necessary to manufacture only one kind of intermediate mobile to drive the first mobile center 2 and the second mobile center 1, which reduces the number of different parts to be manufactured. It therefore suffices to have the pinion 16 of the first intermediate mobile 4 on the side of the plate 7 and the pinion 19 of the second intermediate mobile on the side of the bridge 8 to ensure correct mounting of the mechanism.

La similitude des mobiles intermédiaires 4 et 3 peut entraîner celle des rotors-moteurs 6 et 5 et celle des planches centrales 17 et 20.The similarity of the intermediate mobiles 4 and 3 can lead to that of the rotor-motors 6 and 5 and that of the central boards 17 and 20.

En ce qui concerne les rotors-moteurs, il va de soi que les taillages des pignons 30 et 31 doivent être identiques. Si l'on s'arrange par ailleurs pour que les pivots, la hauteur des pignons 30 et 31, les aimants 32 et 33 et les tigerons soient les mêmes pour les deux rotors-moteurs, on aura réalisé deux pièces identiques et interchangeables et diminué ainsi les coûts de fabrication.As regards the rotor-motors, it goes without saying that the gears of the pinions 30 and 31 must be identical. If we also arrange for the pivots, the height of the pinions 30 and 31, the magnets 32 and 33 and the tigerons to be the same for the two rotor-motors, we will have produced two identical and interchangeable parts and reduced thus manufacturing costs.

En ce qui concerne les planches 17 et 20 faisant respectivement partie des premier et second mobiles 2 et 1, il va également de soi que leurs diamètres et nombre de dents doivent être égaux. On comprendra dès lors que si l'on s'arrange pour les pourvoir d'un même alésage central 23 et 24, on aura produit deux planches identiques et réduit en conséquence les outils de fabrication à mettre en oeuvre.With regard to the boards 17 and 20 forming respectively part of the first and second mobile 2 and 1, it also goes without saying that their diameters and number of teeth must be equal. It will therefore be understood that if we arrange to provide them with the same central bore 23 and 24, we will have produced two identical boards and consequently reduced the manufacturing tools to be used.

En conclusion de ce qui vient d'être dit, le mécanisme de l'invention est grandement simplifié par l'utilisation de deux rotors-moteurs identiques, de deux mobiles intermédiaires identiques et de deux roues de centre dont les axes, canon et arbre, sont différents, mais dont les planches sont identiques.In conclusion of what has just been said, the mechanism of the invention is greatly simplified by the use of two identical rotor-motors, of two identical intermediate mobiles and two center wheels whose axes, barrel and shaft are different, but whose boards are identical.

En plus de la simplicité de fabrication évoquée ci-dessus, on comprendra qu'on a tout avantage à proposer un mécanisme le plus mince possible. Pour atteindre ce but, une autre caractéristique de l'invention dispose que les planches 15 et 18 des premier et second mobiles intermédiaires 4 et 3, outre le caractère identique de ces derniers, se trouvent dans un plan médian 22 situé à égales distances entre la platine 7 et le pont de rouage 8. De cette manière, le mécanisme présente une épaisseur minimum car les planches 17 et 20 des mobiles de centre 2 et 1 peuvent être rapprochées du plan médian 22, ce qui laisse un maximum de place au stator 12 du moteur disposé entre la planche 17 et la platine 7.In addition to the simplicity of manufacture mentioned above, it will be understood that it is very advantageous to provide a mechanism as thin as possible. To achieve this object, another characteristic of the invention provides that the plates 15 and 18 of the first and second intermediate mobiles 4 and 3, in addition to the identical nature of the latter, are located in a median plane 22 located at equal distances between the plate 7 and the gear train 8. In this way, the mechanism has a minimum thickness because the boards 17 and 20 of the mobiles with center 2 and 1 can be brought closer to the median plane 22, which leaves a maximum of space for the stator 12 of the motor disposed between the board 17 and the plate 7.

La disposition qui vient d'être décrite présente un autre avantage. En effet, les planches 15 et 18 des mobiles intermédiaires se trouvant dans le plan médian 22, les planches 17 et 20 des premier et second mobiles de centre 2 et 1 peuvent être disposées de part et d'autre du plan médian 22 et à égales distances de celui-ci, comme cela est représenté sur la figure 2. Cette disposition particulière permet de retourner les deux mobiles de centre 2 et 1 et les deux mobiles intermédiaires 4 et 3 pour arriver à la situation illustrée en figure 3 où les aiguilles 10 et 11 sont situées sur le pont de rouage 8. Cette nouvelle situation, obtenue sans difficulté et au moyen des mêmes mobiles composant le mécanisme, est celle d'un mécanisme destiné à être assemblé dans une montre monobloc à fond fait d'une pièce avec la carrure, tel un boîtier en plastique par exemple. On comprend que la situation montrée en figure 2, avec les aiguilles 10 et 11 émergeant du côté platine 7, est celle convenant à un mouvement ordinaire, livré pour lui-même et destiné à être monté par le fond de la pièce d'horlogerie.The arrangement which has just been described has another advantage. Indeed, the boards 15 and 18 of the intermediate mobiles being in the median plane 22, the boards 17 and 20 of the first and second mobiles of center 2 and 1 can be arranged on either side of the median plane 22 and equal distances from it, as shown in FIG. 2. This particular arrangement makes it possible to return the two mobiles with center 2 and 1 and the two intermediate mobiles 4 and 3 to arrive at the situation illustrated in FIG. 3 where the needles 10 and 11 are located on the gear train 8. This new situation, obtained without difficulty and by means of the same mobiles composing the mechanism, is that of a mechanism intended to be assembled in a monobloc watch with a bottom made of one piece with the middle part, such as a plastic case for example. We understand that the situation shown in Figure 2, with the hands 10 and 11 emerging from the plate side 7, is that suitable for an ordinary movement, delivered for itself and intended to be mounted by the bottom of the timepiece.

On peut même envisager un mécanisme transformable sur demande de la situation présentée en figure 2 à celle de la figure 3 ou inversement, mécanisme équipé non seulement des mêmes mobiles, mais encore d'une même platine 7 et d'un même pont 8. Il faut pour cela que l'extrémité 26 de l'arbre 21 ne portant pas d'aiguille soit montée en rotation dans un palier 9 chassé dans la platine 7 (figure 3) ou dans le pont 8 (figure 2) et que le canon 18 traversant respectivement le pont 8 ou la platine 7 soit ajusté en rotation dans l'un desdits pont ou platine et que le diamètre extérieur 27 du palier 9 soit sensiblement égal au diamètre extérieur 28 du canon 18 à l'endroit où ce dernier traverse le pont 8 ou la platine 7.One can even envisage a mechanism which can be transformed on request from the situation presented in FIG. 2 to that of FIG. 3 or vice versa, a mechanism equipped not only with the same mobiles, but also with the same plate 7 and with the same bridge 8. It this requires that the end 26 of the shaft 21 not carrying a needle is rotatably mounted in a bearing 9 driven into the plate 7 (Figure 3) or in the bridge 8 (Figure 2) and that the barrel 18 crossing respectively the bridge 8 or the plate 7 is adjusted in rotation in one of said bridge or plate and that the outside diameter 27 of the bearing 9 is substantially equal to the outside diameter 28 of the barrel 18 at the place where the latter crosses the bridge 8 or plate 7.

Le mécanisme décrit ci-dessus peut être utilisé dans toute pièce d'horlogerie analogique dont les aiguilles sont commandées indépendamment l'une de l'autre par un circuit électronique. Plus particulièrement, son utilisation est bien adaptée dans une montre chronographe ou une montre alarme à deux aiguilles susceptibles d'afficher, en réponse à l'actionnement d'un dispositif de commande, soit l'heure du jour ou l'heure d'alarme indiquant l'heure et la minute, soit un temps chronométré indiquant la minute et la seconde. Une telle montre-chronographe est décrite, pour la partie commande, dans la demande de brevet CH 01497/93-2 déposée le 17 mai 1993 appartenant au même titulaire que celui de la présente invention.The mechanism described above can be used in any analog timepiece whose hands are controlled independently of one another by an electronic circuit. More particularly, its use is well suited in a chronograph watch or an alarm watch with two hands capable of displaying, in response to the actuation of a control device, either the time of day or the alarm time indicating the hour and the minute, that is a timed time indicating the minute and the second. Such a chronograph watch is described, for the control part, in patent application CH 01497 / 93-2 filed on May 17, 1993 belonging to the same owner as that of the present invention.

Claims (9)

Mécanisme d'entraînement des aiguilles (10,11) d'une pièce d'horlogerie comportant, disposés entre une platine (7) et un pont (8), un premier rotor-moteur (6) entraînant une planche (15) d'un premier mobile intermédiaire (4), ledit premier mobile intermédiaire portant un pignon (16) entraînant un premier mobile de centre (2), ce dernier comportant une planche (17) engrénant sur ledit pignon (16) et un canon (18) sur lequel est emmanchée une aiguille (11) affichant une première unité de temps, et un second rotor-moteur (5) entraînant une planche (18) d'un second mobile intermédiaire (3), ledit second mobile intermédiaire portant un pignon (19) entraînant un second mobile de centre (1), coaxial au premier, ce second mobile de centre comportant une planche (20) engrénant sur ledit pignon (19) et un arbre (21) traversant le canon (18), arbre sur lequel est emmanchée une aiguille (10) affichant une seconde unité de temps, caractérisé par le fait que les premier et second mobiles intermédiaires (4,3) sont identiques et interchangeables et qu'ils sont disposés en tête-bêche entre la platine (7) et le pont (8).Mechanism for driving the hands (10, 11) of a timepiece comprising, disposed between a plate (7) and a bridge (8), a first rotor-motor (6) driving a board (15) of a first intermediate mobile (4), said first intermediate mobile carrying a pinion (16) driving a first central mobile (2), the latter comprising a board (17) meshing on said pinion (16) and a barrel (18) on which is fitted a hand (11) displaying a first time unit, and a second motor rotor (5) driving a board (18) of a second intermediate mobile (3), said second intermediate mobile carrying a pinion (19) driving a second center mobile (1), coaxial with the first, this second center mobile comprising a board (20) meshing on said pinion (19) and a shaft (21) passing through the barrel (18), shaft on which is fitted a hand (10) displaying a second time unit, characterized in that the first and second d intermediate mobiles (4,3) are identical and interchangeable and they are arranged upside down between the plate (7) and the bridge (8). Mécanisme selon la revendication 1, caractérisé par le fait que les premier et second rotors-moteurs (6,5) sont identiques et interchangeables.Mechanism according to claim 1, characterized in that the first and second motor rotors (6,5) are identical and interchangeable. Mécanisme selon la revendication 1, caractérisé par le fait que les planches (17,20) des premier et second mobiles de centre (2,1) sont réalisées de manière identique tant en ce qui concerne le diamètre et le nombre de dents qu'en ce qui concerne l'alésage central (23,24) qu'elles présentent.Mechanism according to claim 1, characterized in that the boards (17,20) of the first and second center mobiles (2,1) are produced in an identical manner as regards both the diameter and the number of teeth as as regards the central bore (23,24) which they present. Mécanisme selon la revendication 1, caractérisé par le fait que les planches (15,18) des premier et second mobiles intermédiaires (4,3) sont disposés dans un plan médian (22) situé à égales distances entre la platine (7) et le pont (8).Mechanism according to claim 1, characterized in that the boards (15,18) of the first and second intermediate mobiles (4,3) are arranged in a median plane (22) located at equal distances between the plate (7) and the bridge (8). Mécanisme selon la revendication 1, caractérisé par le fait que les premier et second rotors-moteurs (6,5) font partie d'un seul moteur à stator unique (12) équipé d'une seule bobine (25).Mechanism according to claim 1, characterized in that the first and second rotor-motors (6,5) are part of a single single stator motor (12) equipped with a single coil (25). Mécanisme selon la revendication 1, caractérisé par le fait que les premier et second rotors-moteurs (6,5) font partie chacun d'un moteur indépendant équipé d'un stator et d'une bobine.Mechanism according to claim 1, characterized in that the first and second rotor-motors (6,5) are each part of an independent motor equipped with a stator and a coil. Mécanisme selon la revendication 4, caractérisé par le fait que les planches (17,20) des premier et second mobiles de centre (2,1) sont situées de part et d'autre du plan médian (22) et à égales distances de celui-ci, de sorte que les mêmes mobiles puissent être utilisés à volonté avec les aiguilles (11,10) situées sur la platine (7) ou sur le pont (8).Mechanism according to claim 4, characterized in that the boards (17,20) of the first and second center mobiles (2,1) are located on either side of the median plane (22) and at equal distances from that -this, so that the same mobiles can be used at will with the needles (11,10) located on the plate (7) or on the bridge (8). Mécanisme selon la revendication 7, caractérisé par le fait que l'extrémité (26) de l'arbre (21) ne portant pas d'aiguille est monté en rotation dans un palier (9) traversant chassé dans la platine (7) ou dans le pont (8) et que le canon (18) traversant respectivement le pont (8) ou la platine (7) est ajusté en rotation dans l'un desdits pont ou platine, le diamètre extérieur (27) dudit palier (9) étant sensiblement égal au diamètre extérieur (28) dudit canon (18) à l'endroit ou il traverse le pont (8) ou la platine (7).Mechanism according to claim 7, characterized in that the end (26) of the shaft (21) not carrying a needle is rotatably mounted in a thrust bearing (9) driven into the plate (7) or in the bridge (8) and that the barrel (18) respectively crossing the bridge (8) or the plate (7) is adjusted in rotation in one of said bridge or plate, the outside diameter (27) of said bearing (9) being substantially equal to the outside diameter (28) of said barrel (18) at the point where it crosses the bridge (8) or the plate (7). Utilisation du mécanisme selon les revendications 1 ou 2 dans une montre-chronographe à deux aiguilles (11,10) susceptibles d'afficher, en réponse à l'actionnement d'un dispositif de commande, soit l'heure du jour indiquant l'heure et la minute, soit un temps chronométré indiquant la minute et la seconde.Use of the mechanism according to claim 1 or 2 in a chronograph watch with two hands (11,10) capable of displaying, in response to the actuation of a control device, either the time of day indicating the time and the minute, a timed time indicating the minute and the second.
EP19940117910 1993-11-19 1994-11-14 Driving mechanism for the hands of a timepiece Expired - Lifetime EP0654718B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3456/93 1993-11-19
CH345693A CH685466B5 (en) 1993-11-19 1993-11-19 drive mechanism of the hands of a timepiece and watch provided with such a mechanism.

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EP0654718A1 true EP0654718A1 (en) 1995-05-24
EP0654718B1 EP0654718B1 (en) 1998-02-25

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CH (1) CH685466B5 (en)
DE (1) DE69408637T2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006120515A1 (en) * 2005-05-12 2006-11-16 Societe Industrielle De Sonceboz S.A. Actuator for measurement indicators
CN105446118A (en) * 2015-12-22 2016-03-30 亿科钟表科技（深圳）有限公司 Watch movement and watch
CN105446119A (en) * 2015-12-22 2016-03-30 亿科钟表科技（深圳）有限公司 Watch movement and watch
CN105573103A (en) * 2015-12-22 2016-05-11 亿科钟表科技（深圳）有限公司 Watch movement and watch

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0393605A1 (en) * 1989-04-21 1990-10-24 Eta SA Fabriques d'Ebauches Electronic time piece with at least two motors
EP0493613A1 (en) * 1990-07-20 1992-07-08 Citizen Watch Co. Ltd. Assembly for a hands indicating type timepiece, method for constructing such timepiece and hands indicating type timepiece obtained

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0393605A1 (en) * 1989-04-21 1990-10-24 Eta SA Fabriques d'Ebauches Electronic time piece with at least two motors
EP0493613A1 (en) * 1990-07-20 1992-07-08 Citizen Watch Co. Ltd. Assembly for a hands indicating type timepiece, method for constructing such timepiece and hands indicating type timepiece obtained

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006120515A1 (en) * 2005-05-12 2006-11-16 Societe Industrielle De Sonceboz S.A. Actuator for measurement indicators
FR2885688A1 (en) * 2005-05-12 2006-11-17 Sonceboz Sa Sa Suisse Soc Ind ACTUATOR FOR MEASUREMENT INDICATORS
CN105446118A (en) * 2015-12-22 2016-03-30 亿科钟表科技（深圳）有限公司 Watch movement and watch
CN105446119A (en) * 2015-12-22 2016-03-30 亿科钟表科技（深圳）有限公司 Watch movement and watch
CN105573103A (en) * 2015-12-22 2016-05-11 亿科钟表科技（深圳）有限公司 Watch movement and watch
CN105446119B (en) * 2015-12-22 2019-05-28 亿科钟表科技（深圳）有限公司 Timepiece movement and wrist-watch

Also Published As

Publication number Publication date
CH685466GA3 (en) 1995-07-31
DE69408637D1 (en) 1998-04-02
EP0654718B1 (en) 1998-02-25
DE69408637T2 (en) 1998-09-17
CH685466B5 (en) 1996-01-31

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