EP0082110A1 - Electronic watch with or without a seconds hand - Google Patents

Electronic watch with or without a seconds hand Download PDF

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Publication number
EP0082110A1
EP0082110A1 EP82810494A EP82810494A EP0082110A1 EP 0082110 A1 EP0082110 A1 EP 0082110A1 EP 82810494 A EP82810494 A EP 82810494A EP 82810494 A EP82810494 A EP 82810494A EP 0082110 A1 EP0082110 A1 EP 0082110A1
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EP
European Patent Office
Prior art keywords
mobile
wheel
minute
axis
hour
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.)
Withdrawn
Application number
EP82810494A
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German (de)
French (fr)
Inventor
Jean Bolzt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
FABRIQUES D'HORLOGERIE DE FONTAINEMELON SA
Original Assignee
FABRIQUES D'HORLOGERIE DE FONTAINEMELON SA
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Publication of EP0082110A1 publication Critical patent/EP0082110A1/en
Withdrawn legal-status Critical Current

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    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B29/00—Frameworks
    • G04B29/02—Plates; Bridges; Cocks
    • 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
    • G04B33/00—Calibers

Definitions

  • the present invention relates to an electronic watch which may or may not have a central seconds hand.
  • the present invention relates to a watch whose cog part of the movement is provided in such a way that it can easily be mounted with a seconds hand in the center or without this hand.
  • the invention relates to a watch in which the major part of the train of the movement is common for the two mounting versions and, in particular the plates, and only a limited number of mobiles must be added to obtain a watch with a seconds hand in the center or without this hand.
  • the watch according to the invention comprises for its two versions a motor, a frame, a first mobile mounted to pivot in the frame and driven by the motor, an hour mobile carrying the hour hand and a wheel of the hours, a coaxial hour carriageway carrying the minute hand and consisting of a minute pinion and a minute wheel; and a timer connecting the hour wheel to the minute pinion.
  • the first mobile consists of one. shaft provided with a bearing arranged in the plane of the minute wheel and a wheel receiving the movement of the engine.
  • the watch further comprises a guide tube open at its two ends and integral with the frame, the barrel wheel and the roadway being pivotally mounted on this tube, means integral with the frame for defining with the tube a first pivot axis combined with the referral axis, means integral with the frame to define a second pivot axis parallel to the referral axis, and means for kinematically connecting the first mobile and the minute wheel.
  • the kinematic connection means consist of a driven wheel on the reach of the first mobile and meshing with the minute wheel.
  • these same kinematic connection means consist of a second mobile comprising a second hand shaft mounted in the guide tube and the means defining the pivot axis, a wheel, for meshing with the wheel of the first mobile, and a pinion.
  • These means further comprise a third mobile, pivotally mounted in the means for defining the second pivot axis and comprising a pinion meshing with the minute wheel and a wheel meshing with the pinion of the second mobile.
  • the watch in its two versions has a large number of common parts and, in particular, the frame, that is to say all the bridges and plate, is strictly identical in both versions. Furthermore, the majority of mobiles are also common. Finally, in both versions, all the elements necessary for mounting additional mobiles are provided in the common areas. These means consist respectively in the bearing provided on the first mobile and in bores drilled in the frame or bearings mounted in the frame to define the first and second pivot axes.
  • the watch comprises a stepping motor 2 comprising a rotor 4.
  • the rotor consists essentially of a permanent magnet 4a and a pinion 4b.
  • the motor is pivotally mounted in the frame by means of bearings or the like, referenced 5. These bearings 5 are respectively formed in a bridge 6 and in a plate or base plate 8.
  • the motor 2 further comprises, of course, a stator which has not been shown in the figure.
  • a motor control circuit makes it possible to send control pulses to the stator coil which determine, in particular, the rate of rotation of the motor.
  • the watch then comprises a mobile transmission 10, constituted by a wheel 10a which meshes with the pinion 4b of the rotor and a pinion 10b.
  • This mobile 10 is pivotally mounted by means of bearings or the like, references 12 and formed respectively in the bridge 6 and the plate 8.
  • the watch then comprises a first mobile 14 comprising a wheel 14a.
  • This first mobile 14 of course also includes a shaft 14c provided with a cylindrical seat I4b, clearly separated from the wheel 14a.
  • the shaft which ends with two pivots engaged in bores or bearings 16. formed respectively in the deck 5 and the plate 8.
  • the watch also comprises a structure defining the referral axes, the referral axis being identified by the axis XX '.
  • This assembly firstly comprises a guide tube 18 open at these two ends and which is driven into a part of the frame referenced 20.
  • This tube 18 externally guides a minute mobile 22 which conventionally comprises, in addition to the tube 22a to l end of which is mounted the minute hand, a minute wheel 22b and a minute pinion 22c.
  • a 24 hour mobile On the outer face of the mobile 22 is mounted a 24 hour mobile which includes the hour wheel 24a and the barrel 24b at the end of which is mounted the hour hand.
  • This switch assembly is completed by a bore forming a bearing 26 which is formed in the bridge 6 and which is centered on the extension of the switch axis XX '.
  • the bore or bearing 26 and the tube 18 thus define a first pivot axis coincident with the referral axis XX '.
  • the watch also includes two bores forming bearings, referenced respectively 30 and 30 ′, which define a second pivot axis YY ′, offset with respect to the axis XX ′ and parallel to it.
  • this element of cog is particularly simple since it consists of a toothed wheel 32 which is driven onto the cylindrical bearing surface 14b of the mobile 14. This toothed wheel 32 meshes with the minute wheel 22b.
  • the wheel 32 has a primitive 0 Dl and the bearing 14b is arranged in the same plane orthogonal to the axis XX 'as the wheel 32.
  • the additional elements for producing the kinematic connection means in the case of a watch with a second in the center.
  • the first mobile 14 no longer has a wheel mounted on its cylindrical bearing 14b.
  • the means which make it possible to kinematically connect the first mobile 14 to the minute wheel 22b and which, moreover, also make it possible to drive the seconds axis are constituted by two additional mobile respectively referenced 34 and 36. From a point of general view the mobile 34 is the second mobile and it allows the driving of the second hand and the mobile 36 is a reduction mobile which allows to transmit the movement from the seconds mobile 34 to the minutes mobile 22 with the desired reduction.
  • the first additional mobile 34 comprises a shaft 34a, a seconds wheel 34b and a seconds gear 34c.
  • the shaft 34a is guided by the hollow tube 18 and by the engagement of the pivot 34d in the bore forming a bearing 26, formed in the bridge 6.
  • the seconds wheel 34b meshes with the wheel 14a of the first mobile 14 which in this case has no multiplier function.
  • the second additional mobile 36 is pivotally mounted by these two pivots 36a, 36'a in the bores 30 and 30 'formed in the plate 8 and the bridge 6.
  • the mobile 36 is pivotally mounted around the axis YY'.
  • the mobile 36 includes a wheel 36b which meshes with the second gear 34c of the second mobile 34. It also includes a pinion 36c which meshes with the minute wheel 22b.
  • a plug 40 for closing off the end of the road. In the case of the assembly of FIG. 2a, the plug 40 is put in place. In the case of the assembly of FIG. 2b, the plug 40 is removed to allow the passage of the seconds axis.
  • Figure 3 provides a better understanding of these dimensional relationships.
  • R 1 the pitch radius of the wheel 14a of the mobile 14 and R 2 the radius of the minute wheel 22b.
  • R 3 is called the pitch radius of the wheel 34b of the seconds wheel and R 4 is the radius of the wheel 32 which is mounted on the wheel 14 when there is no seconds wheel.
  • L the distance between the referral axis XX ′ and the pivot axis of the mobile 14 is called L.
  • the compatibility condition as to the position of the referral axis by relation to the pivot axis of the mobile e 14 so that the road wheel and the second mobile rotate at the appropriate speed is defined by the following relationships: and
  • the structure of the watch remains simple, it is possible to design a watch with a common part of the movement which brings together the majority of the elements of the train and to provide additional parts in reduced number which allow to mount this watch either with a seconds hand in the center or without this hand.
  • the invention therefore very precisely solves the problem posed under very acceptable economic conditions.
  • the common part certainly includes certain elements which would not be essential for one of the two embodiments, but these elements do not entail any complex machining. Indeed, these are holes in the bridge and the plate to define the axis YY 'or the machining of the cylindrical surface of the mobile 14.

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

Abstract

In order to permit production of a watch with or without a seconds hand, the movement comprises, in addition to a motor 4, a framework 6, 8, an hours runner 24 and a minutes runner 22, a transmission runner 14 driven by the motor and equipped with a bearing surface 14b, and holes in the framework to define an axis of rotation coincident with the axis of the hands and a second axis of rotation YY'. For assembly without a seconds hand, a wheel is mounted on the bearing surface 14c. For assembly with a seconds hand, a seconds runner 34 is mounted, disposed according to the axis of the hands, and a transmission runner 36 is mounted, disposed according to the axis YY'. The operations for mounting one or the other of the movements are thus greatly simplified. <IMAGE>

Description

La présente invention concerne une montre électronique qui peut comporter ou ne pas comporter d'aiguille de secondes au centre.The present invention relates to an electronic watch which may or may not have a central seconds hand.

De façon plus précise, la présente invention concerne une montre dont la partie rouage du mouvement est prévue de telle manière qu'elle puisse aisément être montée avec une aiguille des secondes au centre ou sans cette aiguille.More specifically, the present invention relates to a watch whose cog part of the movement is provided in such a way that it can easily be mounted with a seconds hand in the center or without this hand.

Il est bien connu qu'il est intéressant dans une famille de montres de pouvoir proposer un modèle comportant une aiguille de secondes au centre et un même modèle ne comportant pas cette aiguille. Cependant ces deux modèles, habituellement, comportent des mouvements ou du moins des rouages du mouvement sensiblement différents qui s'adaptent au type de montre que l'on veut réaliser. En particulier, les platines ou ponts comportent des usinages sensiblement différents, selon que la montre est munie d'une aiguille de secondes au centre ou pas. Par ailleurs dans le cas des montres électroniques il est clair que le moteur pas-à-pas n'a pas le même rythme de rotation s'il y a une aiguille des secondes ou pas.It is well known that it is advantageous in a family of watches to be able to propose a model comprising a center seconds hand and the same model not comprising this hand. However, these two models, usually, include movements or at least cogs in the movement which are substantially different and which adapt to the type of watch that one wishes to make. In particular, the plates or bridges have substantially different machining operations, depending on whether the watch is provided with a center seconds hand or not. Furthermore in the case of electronic watches it is clear that the stepping motor does not have the same rate of rotation whether there is a second hand or not.

Or, il est intéressant pour le fabricant, et encore plus pour les négociants, que les deux modèles comportent un grand nombre de parties communes pour permettre éventuellement un montage à la demande pour adapter le calibre de base au type de montre désiré par le client sans avoir à constituer des stocks différents. En particu- lier, dans le cas d'une montre pour dames, il est bien connu que le plus souvent il n'est pas souhaité par la clientèle qu'une seconde au centre soit prévue. Cependant, certains clients peuvent souhaiter un tel mode d'affichage du temps.However, it is interesting for the manufacturer, and even more for traders, that the two models include a large number of common parts to possibly allow assembly on demand to adapt the basic caliber to the type of watch desired by the customer without have to build different stocks. P articu- link, in the case of a ladies watch, it is well known that most often it is not desired by the customer a second in the center is planned. However, some customers may wish such a time display mode.

Pour résoudre ce problème, l'invention a pour objet une montre dans laquelle la plus grande partie du rouage du mouvement est commune pour les deux versions de montage et, en particulier les platines, et seul un nombre limité de mobiles doit être ajouté pour obtenir une montre à aiguille des secondes au centre ou sans cette aiguille.To solve this problem, the invention relates to a watch in which the major part of the train of the movement is common for the two mounting versions and, in particular the plates, and only a limited number of mobiles must be added to obtain a watch with a seconds hand in the center or without this hand.

Pour obtenir ce résultat, la montre selon l'invention comporte pour ses deux versions un moteur, un bâti, un premier mobile monté pivotant dans le bâti et entraîné par le moteur, un mobile des heures portant l'aiguille des heures et une roue des heures, une chaussée coaxiale des heures portant l'aiguille des minutes et constitué d'un pignon des minutes et d'une roue des minutes; et une minuterie reliant la roue des heures au pignon des minutes. En outre, dans tous les cas, le premier mobile consiste en un. arbre muni d'une portée disposée dans le plan de la roue des minutes et une roue recevant le mouvement du moteur. La montre comprend de plus, un tube de guidage ouvert à ses deux extrémités et solidaire du bâti, la roue à canon et la chaussée étant montées pivotantes sur ce tube, des moyens solidaires du bâti pour définir avec le tube un premier axe de pivotement confondu avec l'axe d'aiguillage, des moyens solidaires du bâti pour définir un deuxième axe de pivotement parallèle à l'axe d'aiguillage, et des moyens pour relier cinématiquement le premier mobile et la roue des minutes.To obtain this result, the watch according to the invention comprises for its two versions a motor, a frame, a first mobile mounted to pivot in the frame and driven by the motor, an hour mobile carrying the hour hand and a wheel of the hours, a coaxial hour carriageway carrying the minute hand and consisting of a minute pinion and a minute wheel; and a timer connecting the hour wheel to the minute pinion. In addition, in all cases, the first mobile consists of one. shaft provided with a bearing arranged in the plane of the minute wheel and a wheel receiving the movement of the engine. The watch further comprises a guide tube open at its two ends and integral with the frame, the barrel wheel and the roadway being pivotally mounted on this tube, means integral with the frame for defining with the tube a first pivot axis combined with the referral axis, means integral with the frame to define a second pivot axis parallel to the referral axis, and means for kinematically connecting the first mobile and the minute wheel.

Pour le montage sans aiguille des secondes, les moyens de liaison cinématique consistent en une roue chassée sur la portée du premier mobile et engrenant avec la roue des minutes. Dans le cas du montage avec aiguille des secondes ces mêmes moyens de liaison cinématique consistent en un deuxième mobile comprenant un arbre d'aiguille des secondes monté dans le tube de guidage et les moyens définissant l'axe de pivotement, une roue, pour engrener avec la roue du premier mobile, et un pignon. Ces moyens comportent en outre un troisième mobile, monté pivotant dans les moyens pour définir le deuxième axe de pivotement et comprenant un pignon engrenant avec la roue des minutes et une roue engrenant avec le pignon du deuxième mobile.For the second hand assembly without hands, the kinematic connection means consist of a driven wheel on the reach of the first mobile and meshing with the minute wheel. In the case of mounting with second hand these same kinematic connection means consist of a second mobile comprising a second hand shaft mounted in the guide tube and the means defining the pivot axis, a wheel, for meshing with the wheel of the first mobile, and a pinion. These means further comprise a third mobile, pivotally mounted in the means for defining the second pivot axis and comprising a pinion meshing with the minute wheel and a wheel meshing with the pinion of the second mobile.

Il est clair que, grâce à l'invention, la montre dans ses deux versions comporte un grand nombre de parties communes et, en particulier, le bâti, c'est-à-dire l'ensemble des ponts et platine, est strictement identique dans les deux versions. Par ailleurs, la majorité des mobiles est également commune. Enfin, dans les deux versions, la totalité des éléments nécessaires au montage des mobiles additionnels est prévue dans les parties communes. Ces moyens consistent respectivement dans la portée ménagée sur le premier mobile et dans des alésages percés dans le bâti ou des paliers montés dans le bâti pour définir les premier et deuxième axes de pivotement.It is clear that, thanks to the invention, the watch in its two versions has a large number of common parts and, in particular, the frame, that is to say all the bridges and plate, is strictly identical in both versions. Furthermore, the majority of mobiles are also common. Finally, in both versions, all the elements necessary for mounting additional mobiles are provided in the common areas. These means consist respectively in the bearing provided on the first mobile and in bores drilled in the frame or bearings mounted in the frame to define the first and second pivot axes.

L'invention sera mieux comprise à la lecture de la description qui suit, d'un mode de réalisation de l'invention donné à titre d'exemple non limitatif. La description se réfère aux dessins annexés dans lesquels:

  • - la figure 1 est une vue de dessus du mouvement avec aiguille des secondes au centre;
  • - la figure 2a est une vue en coupe et en élévation selon la ligne II-II de la figure 1 dans le cas du montage sans aiguille des secondes;
  • - la figure 2b est une vue en coupe et en élévation selon le même plan de coupe que la figure 2a montrant le mouvement avec aiguille des secondes au centre; et
  • - la figure 3 montre de façon simplifiée les parties communes du mouvement pour illustrer les relations dimensionnelles à respecter dans la partie commune de la montre.
The invention will be better understood on reading the following description of an embodiment of the invention given by way of non-limiting example. The description refers to the accompanying drawings in which:
  • - Figure 1 is a top view of the movement with seconds hand in the center;
  • - Figure 2a is a sectional view in elevation along the line II-II of Figure 1 in the case of mounting without seconds hand;
  • - Figure 2b is a sectional view in elevation along the same sectional plane as Figure 2a showing the movement with center seconds hand; and
  • - Figure 3 shows in a simplified way the common parts of the movement to illustrate the dimensional relationships to be observed in the common part of the watch.

Comme cela est visible sur les figures 1 et 2, la montre comprend un moteur pas-à-pas 2 comportant un rotor 4. Le rotor est constitué essentiellement par un aimant permanent 4a et un pignon 4b. Le moteur est monté pivotant dans le bâti à l'aide de paliers ou analogues, référencés 5. Ces paliers 5 sont respectivement ménagés dans un pont 6 et dans une platine ou plaque de base 8. Le moteur 2 comprend en outre, bien entendu, un stator qui n'a pas été représenté sur la figure. Un circuit de commande du moteur permet d'envoyer à la bobine du stator des impulsions de commande qui déterminent, en particulier, le rythme de rotation du moteur. La montre comprend ensuite un mobile de transmission 10, constitué par une roue 10a qui engrène avec le pignon 4b du rotor et un pignon 10b. Ce mobile 10 est monté pivotant par l'intermédiaire de paliers ou analogues, références 12 et ménagés respectivement dans le pont 6 et la platine 8. La montre comprend ensuite un premier mobile 14 comportant une roue 14a. Ce premier mobile 14 comporte bien sûr également un arbre 14c muni d'une portée cylindrique I4b, nettement séparée de la roue 14a. L'arbre qui se termine par deux pivots engagés dans des alésages ou paliers 16. ménagés respectivement dans le pont 5 et la platine 8. La montre comprend encore une structure définissant les axes d'aiguillage, l'axe d'aiguillage étant repéré par l'axe XX'. Cet ensemble comprend tout d'abord un tube guide 18 ouvert à ces deux extrémités et qui est chassé dans une partie du bâti référencé 20. Ce tube 18 guide extérieurement un mobile des minutes 22 qui comporte de façon classique, outre le tube 22a à l'extrémité duquel est montée l'aiguille des minutes, une roue des minutes 22b et un pignon des minutes 22c. Sur la face externe du mobile 22 est monté un mobile des heures 24 qui comprend la a roue des heures 24a et le canon 24b à l'extrémité duquel est monté l'aiguille des heures. Cet ensemble d'aiguillage est complété par un alésage formant palier 26 qui est ménagé dans le pont 6 et qui est centré sur le prolongement de l'axe d'aiguillage XX'. L'alésage ou palier 26 et le tube 18 définissent ainsi un premier axe de pivotement confondu avec l'axe d'aiguillage XX'. Une roue de minuterie de type classique, représentée seulement sur la figure 1 et portant la référence 28, assure la transmission de façon classique entre le pignon des minutes 22c et la roue des heures 24a. La montre comporte également deux alésages formant paliers, référencés respectivement 30 et 30', qui définissent un deuxième axe de pivotement YY', décalé par rapport à l'axe XX' et parallèle à celui-ci.As can be seen in FIGS. 1 and 2, the watch comprises a stepping motor 2 comprising a rotor 4. The rotor consists essentially of a permanent magnet 4a and a pinion 4b. The motor is pivotally mounted in the frame by means of bearings or the like, referenced 5. These bearings 5 are respectively formed in a bridge 6 and in a plate or base plate 8. The motor 2 further comprises, of course, a stator which has not been shown in the figure. A motor control circuit makes it possible to send control pulses to the stator coil which determine, in particular, the rate of rotation of the motor. The watch then comprises a mobile transmission 10, constituted by a wheel 10a which meshes with the pinion 4b of the rotor and a pinion 10b. This mobile 10 is pivotally mounted by means of bearings or the like, references 12 and formed respectively in the bridge 6 and the plate 8. The watch then comprises a first mobile 14 comprising a wheel 14a. This first mobile 14 of course also includes a shaft 14c provided with a cylindrical seat I4b, clearly separated from the wheel 14a. The shaft which ends with two pivots engaged in bores or bearings 16. formed respectively in the deck 5 and the plate 8. The watch also comprises a structure defining the referral axes, the referral axis being identified by the axis XX '. This assembly firstly comprises a guide tube 18 open at these two ends and which is driven into a part of the frame referenced 20. This tube 18 externally guides a minute mobile 22 which conventionally comprises, in addition to the tube 22a to l end of which is mounted the minute hand, a minute wheel 22b and a minute pinion 22c. On the outer face of the mobile 22 is mounted a 24 hour mobile which includes the hour wheel 24a and the barrel 24b at the end of which is mounted the hour hand. This switch assembly is completed by a bore forming a bearing 26 which is formed in the bridge 6 and which is centered on the extension of the switch axis XX '. The bore or bearing 26 and the tube 18 thus define a first pivot axis coincident with the referral axis XX '. A timer wheel of conventional type, shown only in FIG. 1 and bearing the reference 28, ensures the transmission in a conventional manner between the minutes pinion 22c and the hours wheel 24a. The watch also includes two bores forming bearings, referenced respectively 30 and 30 ′, which define a second pivot axis YY ′, offset with respect to the axis XX ′ and parallel to it.

Les éléments qui viennent d'être décrits précédemment constituent la partie commune de la montre permettant les deux montages à l'exception, bien entendu, du mécanisme de mise à l'heure et de l'habillage qui ne font pas partie de l'invention.The elements which have just been described above constitute the common part of the watch allowing the two assemblies with the exception, of course, of the time-setting mechanism and of the covering which are not part of the invention. .

Pour compléter la montre, il suffit d'ajouter des éléments de rouage qui relient le premier mobile 14 à la roue des minutes 22b. Dans le cas du montage sans aiquille de secondes, cet élément de rouage est particulièrement simple puisqu'il consiste en une roue 32 dentée qui est chassée sur la portée cylindrique 14b du mobile 14. Cette roue dentée 32 engrène avec la roue des minutes 22b. Pour cela, la roue 32 présente un 0 primitif Dl et la portée 14b est disposée dans un même plan orthogonal à l'axe XX' que la roue 32.To complete the watch, it suffices to add gear elements which connect the first mobile 14 to the minute wheel 22b. In the case of mounting without seconds hand, this element of cog is particularly simple since it consists of a toothed wheel 32 which is driven onto the cylindrical bearing surface 14b of the mobile 14. This toothed wheel 32 meshes with the minute wheel 22b. For this, the wheel 32 has a primitive 0 Dl and the bearing 14b is arranged in the same plane orthogonal to the axis XX 'as the wheel 32.

Il apparaît donc clairement, que le rouage à ajouter dans ce cas est particulièrement simple et qu'il ne demande aucune opération particulière par rapport à la structure commune puisqu'il suffit de chasser cette roue sur la portée 14b déjà prévue. Le fonctionnement de ce mode de réalisation découle de façon évidente de la description précédente. La rotation du moteur 2 est transmise au mobile des minutes 22 par l'intermédiaire du mobile intermédiaire 10 et du premier mobile 14 dont la deuxième roue 32 engrène avec la roue des minutes 22b. Quant au mobile des heures, il est entraîné par l'intermédiaire de la minuterie 28.It therefore appears clearly that the gear to be added in this case is particularly simple and that it does not require any particular operation with respect to the common structure since it suffices to drive this wheel onto the bearing 14b already provided. The operation of this embodiment follows clearly from the preceding description. The rotation of the motor 2 is transmitted to the minute mobile 22 via the intermediate mobile 10 and the first mobile 14, the second wheel 32 of which meshes with the minute wheel 22b. As for the hour wheel, it is driven by the timer 28.

En se référant maintenant à la figure 2b on va décrire les éléments additionnels pour réaliser les moyens de liaison cinématique dans le cas d'une montre avec seconde au centre. Tout d'abord, il faut observer, par rapport à la figure 2a, que, bien entendu, le premier mobile 14 ne comporte plus de roue montée sur sa portée cylindrique 14b. Les moyens qui permettent de relier cinématiquement le premier mobile 14 à la roue des minutes 22b et qui, par ailleurs, permettent également d'entraîner l'axe des secondes sont constitués par deux mobiles supplémentaires respectivement référencés 34 et 36. D'un point de vue général le mobile 34 est le mobile des secondes et il permet l'entraînement de l'aiguille des secondes et le mobile 36 est un mobile démultiplicateur qui permet de transmettre le mouvement du mobile de secondes 34 au mobile des minutes 22 avec la démultiplication voulue.Referring now to FIG. 2b, we will describe the additional elements for producing the kinematic connection means in the case of a watch with a second in the center. First of all, it should be observed, with respect to FIG. 2a, that, of course, the first mobile 14 no longer has a wheel mounted on its cylindrical bearing 14b. The means which make it possible to kinematically connect the first mobile 14 to the minute wheel 22b and which, moreover, also make it possible to drive the seconds axis are constituted by two additional mobile respectively referenced 34 and 36. From a point of general view the mobile 34 is the second mobile and it allows the driving of the second hand and the mobile 36 is a reduction mobile which allows to transmit the movement from the seconds mobile 34 to the minutes mobile 22 with the desired reduction.

En considérant les choses plus en détail, il apparaît que le premier mobile supplémentaire 34 comporte un arbre 34a, une roue des secondes 34b et un pignon de secondes 34c. L'arbre 34a est guidé par le tube creux 18 et par l'engagement du pivot 34d dans l'alésage formant palier 26, ménagé dans le pont 6. La roue des secondes 34b engrène avec la roue 14a du premier mobile 14 qui dans ce cas n'a aucune fonction démultiplicatrice.By considering things in more detail, it appears that the first additional mobile 34 comprises a shaft 34a, a seconds wheel 34b and a seconds gear 34c. The shaft 34a is guided by the hollow tube 18 and by the engagement of the pivot 34d in the bore forming a bearing 26, formed in the bridge 6. The seconds wheel 34b meshes with the wheel 14a of the first mobile 14 which in this case has no multiplier function.

Le deuxième mobile supplémentaire 36 est monté pivotant par ces deux pivots 36a, 36'a dans les alésages 30 et 30' ménagés dans la platine 8 et le pont 6. Ainsi, le mobile 36 est monté pivotant autour de l'axe YY'. Le mobile 36 comprend une roue 36b qui engrène avec le pignon des secondes 34c du mobile des secondes 34. Il comprend également un pignon 36c qui engrène avec la roue des minutes 22b. Bien entendu, dans le cas du montage avec aiguille de secondes il est nécessaire que la chaussée 22 soit ouverte à son extrémité portant l'aiguille des minutes. C'est pourquoi, il est avantageux de prévoir un bouchon 40 pour obturer l'extrémité de la chaussée. Dans le cas du montage de la figure 2a, le bouchon 40 est mis en place. Dans le cas du montage de la figure 2b, le bouchon 40 est enlevé pour permettre le passage de l'axe des secondes.The second additional mobile 36 is pivotally mounted by these two pivots 36a, 36'a in the bores 30 and 30 'formed in the plate 8 and the bridge 6. Thus, the mobile 36 is pivotally mounted around the axis YY'. The mobile 36 includes a wheel 36b which meshes with the second gear 34c of the second mobile 34. It also includes a pinion 36c which meshes with the minute wheel 22b. Of course, in the case of mounting with a second hand it is necessary for the carriageway 22 to be open at its end carrying the minute hand. This is why it is advantageous to provide a plug 40 for closing off the end of the road. In the case of the assembly of FIG. 2a, the plug 40 is put in place. In the case of the assembly of FIG. 2b, the plug 40 is removed to allow the passage of the seconds axis.

Le fonctionnement de ce mode de montage de la montre découle aisément de la description précédente. Le mouvement de rotation du moteur est transmis au mobile des secondes 34 par l'intermédiaire du mobile de renvoi 10 et du premier mobile 14. Le mouvement de ce mobile 34 est transmis à la chaussée 22 par le mobile 36. Enfin, le mouvement de la chaussée 22 est transmis à la roue à canon par la minuterie 28.The operation of this mode of mounting the watch follows easily from the preceding description. The rotational movement of the motor is transmitted to the second mobile 34 by means of the return mobile 10 and the first mobile 14. The movement of this mobile 34 is transmitted to the roadway 22 by the mobile 36. Finally, the movement of the roadway 22 is transmitted to the cannon wheel by the timer 28.

Il est nécessaire de préciser qu'en dehors des éléments déjà mentionnés, certaines relations dimensionnelles doivent être respectées pour permettre effectivement le double montage de la montre. Tout d'abord, il est clair que le circuit de commande du moteur 2 sera différent dans les deux cas. En effet, dans le cas où il n'y a pas d'aiguille des secondes, il est inutile de commander le moteur à un pas par seconde ou même avec des vitesses de rotation supérieures. Au contraire, dans le cas du montage avec aiguille des secondes cette condition devra nécessairement être remplie. On appellera NI la vitesse de rotation du premier mobile 14 dans le cas où il n'y a pas d'aiguille des secondes et N2 le rythme de ce même mobile lorsqu'il y a une aiguille des secondes. NI et N2 sont exprimés en tours par minute. Il est aisé de comprendre que la vitesse du mobile 14 est directement liée à celle du moteur du fait que le mobile de transmission 10 est commun aux deux modes de réalisation. On peut, d'ailleurs, indiquer que ce mobile de transmission 10 n'est pas strictement indispensable et que l'on pourrait choisir des vitesses de rotation permettant de le supprimer.It is necessary to specify that apart from the elements already mentioned, certain dimensional relationships must be respected to effectively allow the double mounting of the watch. First of all, it is clear that the engine 2 control circuit will be different in the two cases. Indeed, in the case where there is no second hand, it is useless to control the motor at one step per second or even with higher rotational speeds. On the contrary, in the case of mounting with a second hand, this condition must necessarily be fulfilled. The speed of rotation of the first mobile 14 will be called NI in the case where there is no second hand and N 2 the rhythm of this same mobile when there is a second hand. NI and N 2 are expressed in revolutions per minute. It is easy to understand that the speed of the mobile 14 is directly linked to that of the motor because the transmission mobile 10 is common to the two embodiments. We can, moreover, indicate that this mobile transmission 10 is not strictly essential and that we could choose rotational speeds to remove it.

La figure 3 permet de mieux comprendre ces relations dimensionnelles. On appelle R1 le rayon primitif de la roue 14a du mobile 14 et R2 le rayon de la roue des minutes 22b. Par ailleurs, on appelle R3 le rayon primitif de la roue 34b du mobile des secondes et R4 le rayon de la roue 32 qui est montée sur le mobile 14 lorsqu'il n'y a pas de roue des secondes. Enfin on appelle L la distance entre l'axe d'aiguillage XX' et l'axe de pivotement du mobile 14. La condition de compatibilité quant à la position de l'axe d'aiguillage par rapport à l'axe de pivotement du mobile e 14 pour que la a roue à chaussée et le mobile des secondes tournent à la vitesse convenable est définie par les relations suivantes:

Figure imgb0001
et
Figure imgb0002
 Figure 3 provides a better understanding of these dimensional relationships. We call R 1 the pitch radius of the wheel 14a of the mobile 14 and R 2 the radius of the minute wheel 22b. Furthermore, R 3 is called the pitch radius of the wheel 34b of the seconds wheel and R 4 is the radius of the wheel 32 which is mounted on the wheel 14 when there is no seconds wheel. Finally, the distance between the referral axis XX ′ and the pivot axis of the mobile 14 is called L. The compatibility condition as to the position of the referral axis by relation to the pivot axis of the mobile e 14 so that the road wheel and the second mobile rotate at the appropriate speed is defined by the following relationships:
Figure imgb0001
 and
Figure imgb0002

De ces conditions on peut tirer les deux relations suivantes qui dépendent uniquement des éléments effectivement présents dans la partie commune de la montre. C'est-à-dire qu'il s'agit de relations reliant les valeurs L, R1 et R2.

Figure imgb0003
From these conditions, the following two relationships can be drawn, which depend solely on the elements actually present in the common part of the watch. That is to say that they are relations connecting the values L, R 1 and R 2 .
Figure imgb0003

Pour chaque couple de valeurs choisies pour N1 et N2, il existe donc deux relations devant relier L, R1 et R2.For each pair of values chosen for N 1 and N 2 , there are therefore two relations which must link L, R 1 and R 2 .

Il découle de la description précédente que, bien que la structure de la montre reste simple, il est possible de concevoir une montre avec une partie commune du mouvement qui regroupe la majorité des éléments du rouage et de prévoir des pièces additionnelles en nombre réduit qui permettent de monter cette montre soit avec une aiguille de secondes au centre, soit sans cette aiguille. L'invention résoud donc très exactement le problème posé dans des conditions économiques très acceptables. En effet, la partie commune comporte certes certains éléments qui ne seraient pas indispensables pour l'un des deux modes de réalisation, mais ces éléments n'entraînent aucun usinage complexe. En effet, il s'agit de perçages dans le pont et la platine pour définir l'axe YY' ou de l'usinage de la portée cylindrique du mobile 14.It follows from the above description that, although the structure of the watch remains simple, it is possible to design a watch with a common part of the movement which brings together the majority of the elements of the train and to provide additional parts in reduced number which allow to mount this watch either with a seconds hand in the center or without this hand. The invention therefore very precisely solves the problem posed under very acceptable economic conditions. Indeed, the common part certainly includes certain elements which would not be essential for one of the two embodiments, but these elements do not entail any complex machining. Indeed, these are holes in the bridge and the plate to define the axis YY 'or the machining of the cylindrical surface of the mobile 14.

Claims (3)

1. Montre électronique pour l'affichage analogique du temps comprenant un moteur (2); un bâti (6, 8); un premier mobile (14) monté pivotant dans le bâti et entraîné par le moteur; un mobile des heures (24) comportant une roue des heures (24a) et un canon (24b); un mobile des minutes (22) coaxial au mobile des heures (24) comportant un pignon des minutes (22c) et une roue des minutes (22b); et un mobile de minuterie (28) reliant la roue des heures au pignon des minutes, caractérisée en ce que ledit premier mobile (14) consiste en un arbre (14c) muni d'une portée (14b) disposée sensiblement dans le plan de la roue des minutes et en une roue (14a) recevant le mouvement du moteur et en ce qu'elle comprend en outre un tube de guidage (18) ouvert à ses deux extrémités et solidaire du bâti, lesdits mobiles des heures (24) et des minutes (22) étant montés pivotants sur ledit tube (18), des premiers moyens (26) solidaires du bâti pour définir avec ledit tube (18) un premier axe de pivotement (XX') confondu avec l'axe d'aiguillage, des moyens (30) solidaires du bâti pour définir un deuxième axe de pivotement (YY') parallèle au premier axe de pivotement, et des moyens (32, 34, 36) pour relier cinématiquement ledit premier mobile (14) et ladite roue des minutes (22b).1. Electronic watch for analog time display comprising a motor (2); a frame (6, 8); a first mobile (14) pivotally mounted in the frame and driven by the motor; an hour mobile (24) comprising an hour wheel (24a) and a barrel (24b); a minutes mobile (22) coaxial with the hours mobile (24) comprising a minutes pinion (22c) and a minutes wheel (22b); and a timer mobile (28) connecting the hour wheel to the minute pinion, characterized in that said first mobile (14) consists of a shaft (14c) provided with a bearing (14b) arranged substantially in the plane of the minute wheel and in a wheel (14a) receiving the movement of the motor and in that it further comprises a guide tube (18) open at its two ends and integral with the frame, said hour mobiles (24) and minutes (22) being pivotally mounted on said tube (18), first means (26) integral with the frame to define with said tube (18) a first pivot axis (XX ') coincident with the referral axis, means (30) integral with the frame to define a second pivot axis (YY ') parallel to the first pivot axis, and means (32, 34, 36) for kinematically connecting said first mobile (14) and said minute wheel ( 22b). 2. Montre selon la revendication 1 pour l'affichage analogique de l'heure et de la minute, caractérisée en ce que les moyens de liaison cinématique consistent en une roue (32) chassée sur ladite portée (14b) du premier mobile et engrenant avec ladite roue des minutes (22b).2. Watch according to claim 1 for the analog display of the hour and the minute, characterized in that the kinematic connection means consist of a wheel (32) driven on said surface (14b) of the first mobile and meshing with said minute wheel (22b). 3. Montre selon la revendication 1 pour l'affichage analogique de la seconde, de l'heure et de la minute, caractérisée en ce que les moyens de liaison cinématique consistent en un deuxième mobile (34) comprenant un arbre d'aiguille des secondes (34a) monté dans ledit tube (18) et les moyens (26) pour définir avec ledit tube le premier axe de pivotement (XX'), une roue (34b) pour engrener avec la roue du premier mobile (14), et un pignon des secondes (34c), et en un troisième mobile (36) monté pivotant dans les moyens (30) pour définir le deuxième axe de pivotement et comprenant un pignon (36c) engrenant avec la roue des minutes (22b) et une roue (36b) engrenant avec le pignon des secondes (34c).3. Watch according to claim 1 for the analog display of the second, hour and minute, characterized in that the kinematic connection means consist of a second mobile (34) comprising a second hand shaft (34a) mounted in said tube (18) and the means (26) for defining with said tube the first pivot axis (XX '), a wheel (34b) for meshing with the wheel of the first mobile (14), and a seconds pinion (34c), and a third mobile (36) pivotally mounted in the means (30) to define the second pivot axis and comprising a pinion (36c) meshing with the minutes wheel (22b) and a wheel ( 36b) meshing with the seconds pinion (34c).
EP82810494A 1981-12-16 1982-11-18 Electronic watch with or without a seconds hand Withdrawn EP0082110A1 (en)

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CH801581A CH647636GA3 (en) 1981-12-16 1981-12-16
CH8015/81 1981-12-16

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Cited By (4)

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Publication number Priority date Publication date Assignee Title
EP0255712A1 (en) * 1986-08-07 1988-02-10 Eta SA Fabriques d'Ebauches Works for electronic watch provided with hands for the display
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
FR2690764A1 (en) * 1992-04-30 1993-11-05 Timex Corp Subset for watch movement.
CN102354096A (en) * 2011-09-18 2012-02-15 烟台北极星股份有限公司 Mechanical clock mechanism and design method thereof

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JPS63148891U (en) * 1987-03-19 1988-09-30

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CH8527A (en) * 1894-05-01 1894-11-15 Jacot Houriet Jules Platinum for repeater watches with or without complications
CH291260A (en) * 1949-07-27 1953-06-15 United States Time Corp Watch movement.
CH343910A (en) * 1958-02-18 1959-12-31 Stern Charles Watch
US3023850A (en) * 1959-02-18 1962-03-06 Hamilton Watch Co Modular timer
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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0255712A1 (en) * 1986-08-07 1988-02-10 Eta SA Fabriques d'Ebauches Works for electronic watch provided with hands for the display
WO1988001071A1 (en) * 1986-08-07 1988-02-11 Eta Sa Electronic clockwork with hand display
US4893292A (en) * 1986-08-07 1990-01-09 Eta Sa Fabriques D'ebauches Electronic watch movement comprising time display means having indicator hands
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
EP0493613B1 (en) * 1990-07-20 1996-04-24 Citizen Watch Co. Ltd. Assembly for a hands indicating type timepiece, method for constructing such timepiece and hands indicating type timepiece obtained
FR2690764A1 (en) * 1992-04-30 1993-11-05 Timex Corp Subset for watch movement.
CN102354096A (en) * 2011-09-18 2012-02-15 烟台北极星股份有限公司 Mechanical clock mechanism and design method thereof

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JPS58109879A (en) 1983-06-30

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