EP3776095B1 - Annual date mechanism - Google Patents

Annual date mechanism Download PDF

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Publication number
EP3776095B1
EP3776095B1 EP19708901.4A EP19708901A EP3776095B1 EP 3776095 B1 EP3776095 B1 EP 3776095B1 EP 19708901 A EP19708901 A EP 19708901A EP 3776095 B1 EP3776095 B1 EP 3776095B1
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EP
European Patent Office
Prior art keywords
date
finger
month
wheel assembly
tooth
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EP19708901.4A
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German (de)
French (fr)
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EP3776095A1 (en
Inventor
Samuel Tanner
Thierry REICHENBACH
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Patek Philippe SA Geneve
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Patek Philippe SA Geneve
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Publication of EP3776095A1 publication Critical patent/EP3776095A1/en
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    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B19/00—Indicating the time by visual means
    • G04B19/24—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
    • G04B19/253—Driving or releasing mechanisms
    • G04B19/25333—Driving or releasing mechanisms wherein the date indicators are driven or released mechanically by a clockwork movement
    • G04B19/25353—Driving or releasing mechanisms wherein the date indicators are driven or released mechanically by a clockwork movement driven or released stepwise by the clockwork movement
    • G04B19/2536—Driving or releasing mechanisms wherein the date indicators are driven or released mechanically by a clockwork movement driven or released stepwise by the clockwork movement automatically corrected at the end of months having less than 31 days

Definitions

  • the present invention relates to a date mechanism comprising a date wheel set provided with a 31-tooth toothing, a date display controlled by the date wheel set, a driving wheel set arranged to drive the date wheel set and carrying a first finger and a second finger offset angularly and in height, the first finger being arranged to drive one of the teeth of the date wheel set by one step each day, and further comprises a month cam mounted free to pivot concentrically to the date wheel set and arranged to rotate of a twelfth of a turn for each turn performed by the date wheel set, the date wheel set carrying a rocker provided with at least one tooth, the rocker being arranged to occupy either an active position or an inactive position depending on the position angle of the month cam, said rocker tooth being arranged to be on the trajectory of the second finger of the driving wheel set when the rocker is occupied eg the active position and the date display shows "30".
  • the patent document CH 685 585 describes an annual calendar mechanism which has all the characteristics listed above.
  • this mechanism comprises a driving wheel set which carries two fingers offset both angularly and in height and which are arranged to drive the date wheel set.
  • the first and the second finger are not rigidly fixed to the driving wheel set, but on the contrary are integral with a disc which is itself adjusted freely on the wheel set. coach.
  • a pin is still fixed on the driving mobile to drive the disc in rotation. With this feature, the first and second finger are free to pivot forward away from the pin. The choice of this particular construction is motivated by safety considerations.
  • the security system which has just been described has certain drawbacks. For example, when the hands indicate a time which is early in the morning, and the wearer of the watch then manually moves the hands back until they indicate a time which is the previous evening, this change of displayed time is not accompanied by a corresponding change in date. In fact, the safety system prevents the fingers of the driving wheel set from driving the date wheel set backwards. A solution to this problem could be to do without the security system. However, as we will now see, this expedient does not solve all the problems.
  • the annual calendar mechanism described in the aforementioned prior document has all the characteristics listed in the definition given in the preamble.
  • its date wheel carries a rocker arranged in an off-centre position.
  • This rocker is equipped with a single tooth.
  • the rocker is arranged to selectively occupy one or the other of two positions, one for which the rocker tooth is on the trajectory of the second finger of the drive wheel set, so that the second finger can cause the date wheel set to pivot by one step , and the other for which the tooth is outside the trajectory of the second finger.
  • the angular position of the month cam is such that the rocker tooth is on the path of the second finger of the drive wheel set.
  • the passage of the second finger has the effect of driving the rocker and causing the calendar wheel to advance by one step, which thus passes from the position corresponding to the 30 th day of the month to that corresponding to the 31 st .
  • the calendar wheel must precisely occupy the angular position corresponding to the 30th day of the month so that the rocker tooth is on the trajectory of the second finger of the trainer mobile. Then, as soon as the calendar wheel has moved to the position corresponding to the 31 st day of the month, the rocker tooth is located away from the trajectory of the second finger. The second finger therefore only serves to drive the rocker finger at the end of the 30-day month to cause the date wheel set to pass from the angular position corresponding to the 30 th day of the month to that corresponding to the 31 st .
  • the calendar mobile cannot move back. only one step.
  • the date display therefore indicates the 31st day of the month, even when it is a 30-day month.
  • the second finger does not have the possibility of driving the rocker tooth backwards when the date wheel set occupies the angular position corresponding to the 31st day of the month.
  • the rocker tooth is not in the path of the second finger when the date wheel is in the position corresponding to the 31st day of the month.
  • An object of the present invention is to remedy the drawbacks of the prior art which have just been explained.
  • the present invention achieves this and other objects by providing a time-setting device according to appended claim 1.
  • the rocker is provided with a forward drive tooth and a rearward drive tooth, the two rocker teeth being contiguous so as to form a portion of toothing , the toothing portion being concentric with the toothing of 31 teeth when the rocker occupies said one of the two positions, and the two teeth of the rocker being separated from each other by an angle equal to one pitch of the date wheel set .
  • the figure 1 is a partial plan view of an annual calendar mechanism corresponding to a particular embodiment of the invention.
  • the date mechanism is arranged in a timepiece so as to be driven by the movement of the timepiece.
  • the mobile driver 13 carries a first finger 15 and a second finger 17 which are rigidly fixed to the mobile 13 in offset positions both angularly and in height.
  • the first finger 15 advances a date wheel 19 by one step, which is designed to complete a full turn in thirty-one steps.
  • the figure 1 again shows a month 25 cam which is mounted free to pivot concentrically to the date wheel.
  • the month cam profile 25 has alternating dips and dips, and as will be seen in more detail below, dips correspond to months with 31 days and dips correspond to months with less than 31 days.
  • a lever 27 is pivotally mounted on the plate of the date wheel 19.
  • the lever 27 has two teeth 29, 31 which are contiguous and together form a toothing portion.
  • the spacing between the teeth 29 and 31 is substantially the same as the spacing between the teeth of the toothing 21 of the date wheel.
  • a mobile of the months which includes a star of the months 33 provided with twelve teeth and a reference 35 fixed rigidly in a coaxial position on the star of the months.
  • the transmission 35 is provided with a toothing which meshes with the toothing of a month wheel 37 which is integral and coaxial with the month cam 25.
  • the driving wheel completes one complete revolution while the hour wheel completes two.
  • the drive wheel set is therefore arranged to be driven by the movement of the timepiece at the rate of one revolution in 24 hours.
  • the timepiece is also equipped with a time-setting device making it possible to manually control the position of the minute and hour hands from outside the timepiece.
  • the time setting is meshed with the minute gear train, so that it respectively activates the two hands via the roadway and the hour wheel 11.
  • the time setting of the timepiece also controls the drive wheel set and the date mechanism as a whole.
  • the date wheel 19 is provided with a toothing comprising thirty-one teeth 21, and the first finger 15 is arranged to cause one of the teeth 21 of the toothing to advance by one step at each turn of the driving wheel set 13.
  • the first finger is integral in rotation with the driving wheel 13, and that the latter can be actuated in one direction or the other, it allows the driving of the date wheel backwards as well as forwards .
  • rocker 27 is provided with a portion of teeth formed by two teeth 29 and 31.
  • Rocker 27 also includes a cam follower 32 which is permanently biased against cam 25.
  • the cam follower changes from a dip to a lift of the cam, or vice versa, so that the rocker is caused to pivot between one and the other of two extreme positions depending on whether the current month has 30 or 31 days.
  • the cam follower presses against a lifting of the month cam the toothing portion formed by the two teeth 29, 31 is, in the active position, superimposed on the toothing of the date wheel 19, whereas when the follower cam is located in a hollow of the cam, the tooth portion is retracted.
  • the two teeth 29 and 31 are respectively a forward driving tooth and a rearward driving tooth.
  • the forward drive tooth 29 is on the path of the second finger 17 of the drive wheel set 13 when the date wheel 19 is in the position corresponding to the date 30, and the rearward drive tooth 31 is on this trajectory when the date wheel is in the angular position corresponding to the date 31.
  • the second finger meets the one of the teeth 29 or 31, he pushes it in front of him so as to cause the date wheel 19 to pivot by one step.
  • the date wheel 19 further comprises a finger 23 arranged to cooperate with one of the twelve teeth of the month star 33 so as to drive it one step at each revolution of the date wheel set.
  • the month wheel set and its star wheel 33 are arranged to be driven by one twelfth of a turn for each complete turn performed by the date wheel 19.
  • the month wheel set also includes a reference 35 which is fixed rigidly in a coaxial position on the month star.
  • the toothing of the transmission 35 meshes with the toothing of a month wheel 37, itself integral with and coaxial with the month cam 25.
  • the gear ratio is equal to 1 so that the month wheel 37 and the cam 25 months are rotated at the same speed as the 35 return and the 33 month star.
  • the picture 3 is an overall plan view of the same annual calendar mechanism.
  • the sight of the picture 3 shows in particular the date display which, in a manner known per se, comprises a crown 41 divided into 31 sectors each bearing the indication of one of the numbers from 1 to 31.
  • the crown is arranged to turn step by step under the dial of the timepiece so that the numbers from 1 to 31 are successively visible through a window (not shown).
  • Crown 41 also has internal toothing 43 formed of 31 teeth.
  • the step-by-step drive of crown 41 is ensured by a display driving mobile (reference 45).
  • the display driving mobile is itself actuated from the date wheel 19 via a reduction gear train 47.
  • the display also includes a month disk 51 divided into 12 sectors which each bear the indication of one of the twelve months of the year.
  • the month disk 51 is fixed rigidly to the month wheel so that it is driven step by step with the month star 33. It will therefore be understood that the display of the month passes from the indication of one month to that of the following month each time the finger 23 of the date wheel 19 returns to advance one of the teeth of the month star 33 by one step.
  • rocker 27 is provided with a forward drive tooth 29 and a rearward drive tooth 31.
  • the forward drive tooth 29 fulfills exactly the same function as the rocker tooth of the annual calendar mechanism of the prior art described above.
  • the forward drive tooth 29 is on the trajectory of the second finger 17 of the drive mobile 13.
  • the forward 29 and rearward 31 drive teeth are separated from each other by an angle equal to one pitch of the date wheel 19.
  • rearward drive tooth 31 is arranged one step behind forward drive tooth 29.
  • the second finger is integral with the mobile drive, and it traverses its circular trajectory at the rate of one revolution in 24 hours.
  • the passage of the second finger 17 has the effect of advancing the date wheel 19 by one step, which thus passes from the position corresponding to the 30th day of the month to that corresponding to the 31st.
  • the drive wheel rotates a few more degrees
  • the passage of the first finger 15 will have the effect, as every day, of driving one of the 31 teeth of the date wheel set by one more step.
  • the calendar wheel thus moves from the position corresponding to the 31st day of the month to that corresponding to the 1st day of the following month.
  • the passage of the first finger 15 will have the effect of driving one of the 31 teeth of the mobile date 19. It can be noted that, during this retrograde process, the forward drive tooth 29 was not stressed. It was on the path of the second finger 17 for almost one revolution of the mobile drive 13, but as the latter rotates backwards, the passage of the first finger 15 takes place before the passage of the second 17, the tooth of rearward drive 31 has therefore not had the opportunity to encounter the second finger 17 before the date wheel 19 moves back another step to the position corresponding to the 29th day of the month.

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

Description

La présente invention concerne un mécanisme de quantième comportant un mobile de quantième muni d'une denture de 31 dents, un affichage du quantième commandé par le mobile de quantième, un mobile entraîneur agencé pour entraîner le mobile de quantième et portant un premier doigt et un deuxième doigt décalés angulairement et en hauteur, le premier doigt étant agencé pour entraîner chaque jour d'un pas une des dents du mobile de quantième, et comporte en outre une came des mois montée libre de pivoter concentriquement au mobile de quantième et agencée pour tourner d'un douzième de tour pour chaque tour effectué par le mobile de quantième, le mobile de quantième portant une bascule munie d'au moins une dent, la bascule étant agencée pour occuper soit une position active soit une position inactive en fonction de la position angulaire de la came des mois, ladite dent de la bascule étant agencée pour se trouver sur la trajectoire du deuxième doigt du mobile entraîneur lorsque la bascule occupe la position active et que l'affichage de quantième affiche le « 30 ».The present invention relates to a date mechanism comprising a date wheel set provided with a 31-tooth toothing, a date display controlled by the date wheel set, a driving wheel set arranged to drive the date wheel set and carrying a first finger and a second finger offset angularly and in height, the first finger being arranged to drive one of the teeth of the date wheel set by one step each day, and further comprises a month cam mounted free to pivot concentrically to the date wheel set and arranged to rotate of a twelfth of a turn for each turn performed by the date wheel set, the date wheel set carrying a rocker provided with at least one tooth, the rocker being arranged to occupy either an active position or an inactive position depending on the position angle of the month cam, said rocker tooth being arranged to be on the trajectory of the second finger of the driving wheel set when the rocker is occupied eg the active position and the date display shows "30".

ART ANTERIEURPRIOR ART

On connait déjà des mécanismes de quantième conforme à la définition donnée en préambule. Le document de brevet CH 685 585 , notamment, décrit un mécanisme de quantième annuel qui possède l'ensemble des caractéristiques énumérées ci-dessus. En particulier, ce mécanisme comporte un mobile entraîneur qui porte deux doigts décalés tout à la fois angulairement et en hauteur et qui sont agencés pour entraîner le mobile de quantième. Il est important de noter en outre que, selon le document de brevet susmentionné, le premier et le deuxième doigt ne sont pas fixés rigidement au mobile entraîneur, mais sont au contraire solidaires d'un disque qui est lui-même ajusté librement sur le mobile entraîneur. Enfin, une goupille est encore fixée sur le mobile entraîneur pour entraîner le disque en rotation. Grâce à cette caractéristique, le premier et le deuxième doigt sont libres de pivoter vers l'avant en s'éloignant de la goupille. Le choix de cette construction particulière est motivé par des considérations liées à la sécurité. En effet, on sait que, dans une montre-calendrier habituelle, il est important de ne pas essayer de corriger manuellement le quantième lorsque l'heure indiquée par les aiguilles s'approche de minuit. Sinon, on risque de casser un composant en forçant les dents du mobile de quantième contre le doigt du mobile entraîneur. On comprendra donc que la construction particulière qui vient d'être décrite constitue une forme de système de sécurité permettant d'éviter les mauvaises manipulations. On comprendra que grâce à ce système de sécurité, si d'aventure le porteur de la montre décide de faire avancer manuellement le quantième du calendrier aux alentours de minuit, les dents du mobile de quantième pourront repousser sans efforts vers l'avant les deux doigts du mobile entraîneur.Date mechanisms conforming to the definition given in the preamble are already known. The patent document CH 685 585 , in particular, describes an annual calendar mechanism which has all the characteristics listed above. In particular, this mechanism comprises a driving wheel set which carries two fingers offset both angularly and in height and which are arranged to drive the date wheel set. It is also important to note that, according to the aforementioned patent document, the first and the second finger are not rigidly fixed to the driving wheel set, but on the contrary are integral with a disc which is itself adjusted freely on the wheel set. coach. Finally, a pin is still fixed on the driving mobile to drive the disc in rotation. With this feature, the first and second finger are free to pivot forward away from the pin. The choice of this particular construction is motivated by safety considerations. Indeed, it is known that, in a usual calendar watch, it is important not to try to manually correct the date when the time indicated by the hands approaches midnight. Otherwise, there is a risk of breaking a component by forcing the teeth of the date wheel set against the finger of the driving wheel set. It will therefore be understood that the particular construction which has just been described constitutes a form of security system making it possible to avoid mishandling. It will be understood that thanks to this security system, if by chance the wearer of the watch decides to manually advance the date of the calendar around midnight, the teeth of the date wheel set will be able to push the two fingers forward effortlessly of the mobile trainer.

Le système de sécurité qui vient d'être décrit présente toutefois certains inconvénients. Par exemple, lorsque les aiguilles indiquent une heure qui est tôt le matin, et que le porteur de la montre fait ensuite manuellement reculer les aiguilles jusqu'à ce qu'elles indiquent une heure qui est la veille au soir, ce changement de l'heure affichée ne s'accompagne pas d'un changement correspondant de la date. En effet, le système de sécurité empêche les doigts du mobile entraîneur d'entraîner le mobile de quantième en arrière. Une solution pour résoudre ce problème pourrait être de se passer du système de sécurité. Toutefois, comme on va le voir maintenant, cet expédient ne résout pas tous les problèmes.However, the security system which has just been described has certain drawbacks. For example, when the hands indicate a time which is early in the morning, and the wearer of the watch then manually moves the hands back until they indicate a time which is the previous evening, this change of displayed time is not accompanied by a corresponding change in date. In fact, the safety system prevents the fingers of the driving wheel set from driving the date wheel set backwards. A solution to this problem could be to do without the security system. However, as we will now see, this expedient does not solve all the problems.

Comme on l'a déjà dit, le mécanisme de quantième annuel décrit dans le document antérieur susmentionné possède toutes les caractéristiques énumérées dans la définition donnée en préambule. En particulier, son mobile de quantième porte une bascule arrangée en position excentrée. Cette bascule est munie d'une unique dent. La bascule est agencée pour occuper sélectivement l'une ou l'autre de deux positions, l'une pour laquelle la dent de la bascule se trouve sur la trajectoire du deuxième doigt du mobile entraîneur, de sorte que le deuxième doigt peut faire pivoter d'un pas le mobile de quantième, et l'autre pour laquelle la dent se trouve en dehors de la trajectoire du deuxième doigt. A la fin d'un mois de 30 jours, la position angulaire de la came des mois est telle que la dent de la bascule se trouve sur la trajectoire du deuxième doigt du mobile entraîneur. Dans ces conditions, le passage du deuxième doigt a pour effet d'entraîner la bascule et de faire avancer d'un pas le mobile de quantième qui passe ainsi de la position correspondant au 30ème jour du mois à celle correspondant au 31ème. Quelques minutes ou dizaines de minutes plus tard, c'est le premier doigt qui entraîne comme chaque jour d'un pas une des 31 dents du mobile de quantième, le faisant ainsi passer de la position correspondant au 31ème jour du mois à celle correspondant au 1er jour du mois suivant.As has already been said, the annual calendar mechanism described in the aforementioned prior document has all the characteristics listed in the definition given in the preamble. In particular, its date wheel carries a rocker arranged in an off-centre position. This rocker is equipped with a single tooth. The rocker is arranged to selectively occupy one or the other of two positions, one for which the rocker tooth is on the trajectory of the second finger of the drive wheel set, so that the second finger can cause the date wheel set to pivot by one step , and the other for which the tooth is outside the trajectory of the second finger. At the end of a 30-day month, the angular position of the month cam is such that the rocker tooth is on the path of the second finger of the drive wheel set. Under these conditions, the passage of the second finger has the effect of driving the rocker and causing the calendar wheel to advance by one step, which thus passes from the position corresponding to the 30 th day of the month to that corresponding to the 31 st . A few minutes or tens of minutes later, it is the first finger which drives one of the 31 teeth of the date mobile by one step every day, thus causing it to pass from the position corresponding to the 31st day of the month to that corresponding on the 1st day of the following month.

On comprendra de ce qui précède qu'à la fin des mois de 30 jours, il faut que le mobile de quantième occupe précisément la position angulaire correspondant au 30ème jour du mois pour que la dent de la bascule se trouve sur la trajectoire du deuxième doigt du mobile entraîneur. Ensuite, dès que le mobile de quantième a été amené à passer à la position correspondant au 31ème jour du mois, la dent de la bascule se trouve à l'écart de la trajectoire du deuxième doigt. Le deuxième doigt sert donc uniquement à entraîner le doigt de la bascule à la fin des mois de 30 jours pour faire passer le mobile de quantième de la position angulaire correspondant au 30ème jour du mois à celle correspondant au 31ème. Dans ces conditions, si l'affichage du quantième indique le premier jour du mois, et que le porteur de la montre fait manuellement reculer les aiguilles jusqu'à ce qu'elles indiquent une heure située la veille, le mobile de quantième ne peut reculer que d'un seul pas. L'affichage du quantième indique donc le 31ème jour du mois, même lorsqu'il s'agit d'un mois de 30 jours. En effet, le deuxième doigt n'a pas la possibilité d'entraîner en arrière la dent de la bascule lorsque le mobile de quantième occupe la position angulaire correspondant au 31ème jour du mois. En effet, la dent de la bascule ne se trouve pas sur la trajectoire du deuxième doigt lorsque le mobile de quantième occupe la position correspondant au 31ème jour du mois.It will be understood from the foregoing that at the end of a 30-day month, the calendar wheel must precisely occupy the angular position corresponding to the 30th day of the month so that the rocker tooth is on the trajectory of the second finger of the trainer mobile. Then, as soon as the calendar wheel has moved to the position corresponding to the 31 st day of the month, the rocker tooth is located away from the trajectory of the second finger. The second finger therefore only serves to drive the rocker finger at the end of the 30-day month to cause the date wheel set to pass from the angular position corresponding to the 30 th day of the month to that corresponding to the 31 st . Under these conditions, if the date display indicates the first day of the month, and the wearer of the watch manually moves the hands backwards until they indicate a time situated the day before, the calendar mobile cannot move back. only one step. The date display therefore indicates the 31st day of the month, even when it is a 30-day month. Indeed, the second finger does not have the possibility of driving the rocker tooth backwards when the date wheel set occupies the angular position corresponding to the 31st day of the month. In In fact, the rocker tooth is not in the path of the second finger when the date wheel is in the position corresponding to the 31st day of the month.

BREF EXPOSE DE L'INVENTIONBRIEF DESCRIPTION OF THE INVENTION

Un but de la présente invention est de remédier aux inconvénients de l'art antérieur qui viennent d'être expliqués. La présente invention atteint ce but ainsi que d'autres en fournissant un dispositif de mise à l'heure conforme à la revendication 1 annexée.An object of the present invention is to remedy the drawbacks of the prior art which have just been explained. The present invention achieves this and other objects by providing a time-setting device according to appended claim 1.

Conformément à l'invention, la bascule est munie d'une dent d'entraînement vers l'avant et d'une dent d'entraînement vers l'arrière, les deux dents de la bascule étant contiguës de manière à former une portion de denture, la portion de denture étant concentrique à la denture de 31 dents lorsque la bascule occupe ladite une des deux positions, et les deux dents de la bascule étant séparées l'une de l'autre par un angle égal à un pas du mobile de quantième.According to the invention, the rocker is provided with a forward drive tooth and a rearward drive tooth, the two rocker teeth being contiguous so as to form a portion of toothing , the toothing portion being concentric with the toothing of 31 teeth when the rocker occupies said one of the two positions, and the two teeth of the rocker being separated from each other by an angle equal to one pitch of the date wheel set .

BREVE DESCRIPTION DES FIGURESBRIEF DESCRIPTION OF FIGURES

D'autres caractéristiques et avantages de la présente invention apparaîtront à la lecture de la description qui va suivre, donnée uniquement à titre d'exemple non limitatif, et faite en référence aux dessins annexés dans lesquels :

  • la figure 1 est une vue partielle en plan d'un mécanisme de quantième annuel correspondant à un mode de réalisation particulier de l'invention, la vue partielle montrant notamment le mobile entraîneur et le mobile de quantième ;
  • la figure 2 est une vue partielle en perspective du mécanisme de quantième annuel de la figure 1, la vue en perspective montrant le mobile entraîneur en prise avec le mobile de quantième ;
  • la figure 3 est une vue en plan du mécanisme de quantième annuel des figures 1 et 2.
Other characteristics and advantages of the present invention will appear on reading the following description, given solely by way of non-limiting example, and made with reference to the appended drawings in which:
  • the figure 1 is a partial plan view of an annual calendar mechanism corresponding to a particular embodiment of the invention, the partial view showing in particular the driving wheel and the calendar wheel;
  • the figure 2 is a partial perspective view of the annual calendar mechanism of the figure 1 , the perspective view showing the driving wheel in engagement with the date wheel;
  • the picture 3 is a plan view of the annual calendar mechanism of the figures 1 and 2 .

DESCRIPTION DETAILLEE D'UN MODE DE REALISATIONDETAILED DESCRIPTION OF AN EMBODIMENT

La figure 1 est une vue partielle en plan d'un mécanisme de quantième annuel correspondant à un mode de réalisation particulier de l'invention. Conformément à l'invention, le mécanisme de quantième est agencé dans une pièce d'horlogerie de manière à être entraîné par le mouvement de la pièce d'horlogerie.The figure 1 is a partial plan view of an annual calendar mechanism corresponding to a particular embodiment of the invention. According to the invention, the date mechanism is arranged in a timepiece so as to be driven by the movement of the timepiece.

En se référant à la figure 1, on peut voir tout d'abord une roue des heures (référencée 11) faisant partie du mouvement horloger susmentionné (non représenté) et un mobile entraîneur 13 qui, dans le présent exemple, est agencé pour être entraîné à partir de la roue des heures 11 par l'intermédiaire d'un engrenage (non représenté) de rapport 1/2. On peut voir également que le mobile entraîneur 13 porte un premier doigt 15 et un deuxième doigt 17 qui sont fixés rigidement au mobile 13 en positions décalées à la fois angulairement et en hauteur. A chaque tour du mobile entraîneur 13, le premier doigt 15 fait avancer d'un pas une roue de quantième 19 qui est prévue pour accomplir un tour complet en trente-et-un pas. La figure 1 montre encore une came des mois 25 qui est montée libre de pivoter concentriquement à la roue de quantième. Le profil de la came des mois 25 comporte une alternance de creux et de levées, et comme on le verra plus en détail plus loin, les creux correspondent aux mois de 31 jours et les levées correspondent au mois comptant moins de 31 jours. On peut voir en outre qu'une bascule 27 est montée pivotante sur la planche de la roue de quantième 19. La bascule 27 présente deux dents 29, 31 qui sont contiguës et forment ensemble une portion de denture. On peut observer que, dans l'exemple illustré, l'espacement entre les dents 29 et 31 est sensiblement le même que l'espacement entre les dents de la denture 21 de la roue de quantième. On peut voir en outre un mobile des mois qui comporte une étoile des mois 33 munie de douze dents et un renvoi 35 fixé rigidement en position coaxiale sur l'étoile des mois. Le renvoi 35 est muni d'une denture qui engrène avec la denture d'une roue des mois 37 qui est solidaire et coaxiale avec la came des mois 25.By referring to the figure 1 , we can see first of all an hour wheel (referenced 11) forming part of the aforementioned watch movement (not shown) and a driving wheel set 13 which, in the present example, is arranged to be driven from the hour wheel 11 via a gear (not shown) ratio 1/2. It can also be seen that the mobile driver 13 carries a first finger 15 and a second finger 17 which are rigidly fixed to the mobile 13 in offset positions both angularly and in height. At each turn of the driving wheel set 13, the first finger 15 advances a date wheel 19 by one step, which is designed to complete a full turn in thirty-one steps. The figure 1 again shows a month 25 cam which is mounted free to pivot concentrically to the date wheel. The month cam profile 25 has alternating dips and dips, and as will be seen in more detail below, dips correspond to months with 31 days and dips correspond to months with less than 31 days. It can also be seen that a lever 27 is pivotally mounted on the plate of the date wheel 19. The lever 27 has two teeth 29, 31 which are contiguous and together form a toothing portion. It can be observed that, in the example illustrated, the spacing between the teeth 29 and 31 is substantially the same as the spacing between the teeth of the toothing 21 of the date wheel. We can also see a mobile of the months which includes a star of the months 33 provided with twelve teeth and a reference 35 fixed rigidly in a coaxial position on the star of the months. The transmission 35 is provided with a toothing which meshes with the toothing of a month wheel 37 which is integral and coaxial with the month cam 25.

Comme le rapport d'engrenage du rouage reliant la roue des heures 11 au mobile d'entraînement 13 est égale à ½, le mobile d'entraînement accomplit une révolution complète pendant que la roue des heures en accomplit deux. Le mobile d'entraînement est donc agencé pour être entraîné par le mouvement de la pièce d'horlogerie au rythme d'un tour en 24 heures. De manière connue en soi, la pièce d'horlogerie est également équipée d'une mise à l'heure permettant de commander manuellement la position des aiguilles des minutes et des heures depuis l'extérieur de la pièce d'horlogerie. Dans le présent exemple, la mise à l'heure est en prise avec le rouage de minuterie, de sorte qu'elle actionne respectivement les deux aiguilles par l'intermédiaire de la chaussée et de la roue des heures 11. Comme le mobile d'entraînement 13 est relié cinématiquement à la roue des heures, on comprendra que la mise à l'heure de la pièce d'horlogerie commande également le mobile d'entraînement et le mécanisme de quantième dans son ensemble.As the gear ratio of the gear train connecting the hour wheel 11 to the driving wheel 13 is equal to ½, the driving wheel completes one complete revolution while the hour wheel completes two. The drive wheel set is therefore arranged to be driven by the movement of the timepiece at the rate of one revolution in 24 hours. In a manner known per se, the timepiece is also equipped with a time-setting device making it possible to manually control the position of the minute and hour hands from outside the timepiece. In the present example, the time setting is meshed with the minute gear train, so that it respectively activates the two hands via the roadway and the hour wheel 11. Like the mobile of drive 13 is kinematically connected to the hour wheel, it will be understood that the time setting of the timepiece also controls the drive wheel set and the date mechanism as a whole.

La roue de quantième 19 est munie d'une denture comptant trente-et-une dents 21, et le premier doigt 15 est agencé pour faire avancer d'un pas une des dents 21 de la denture à chaque tour du mobile entraîneur 13. On comprendra que, comme le premier doigt est solidaire en rotation du mobile entraîneur 13, et que ce dernier peut être actionné dans un sens ou dans l'autre, il permet l'entraînement de la roue de quantième en arrière aussi bien qu'en avant. D'autre part, comme déjà mentionné, la bascule 27 est munie d'une portion de dentures formées de deux dents 29 et 31. La bascule 27 comporte également un suiveur de came 32 qui est rappelé en permanence contre la came 25. Ainsi, lorsque la came des mois tourne relativement à la roue de quantième 19, le suiveur de came passe d'un creux à une levée de la came, ou inversement, de sorte que la bascule est amenée à pivoter entre l'une et l'autre de deux positions extrêmes selon que le mois courant compte 30 ou 31 jours. Lorsque le suiveur de came appuie contre une levée de la came des mois, la portion de denture formée par les deux dents 29, 31 se trouve, en position active, superposée à la denture de la roue de quantième 19, alors que lorsque le suiveur de came se trouve dans un creux de la came, la portion de denture est rétractée. Comme on le verra plus en détail plus loin, les deux dents 29 et 31 sont respectivement une dent d'entraînement vers l'avant et une dent d'entraînement vers l'arrière. Lorsque la portion de denture de la bascule 27 n'est pas en position rétractée, la dent d'entraînement vers l'avant 29 se trouve sur la trajectoire du deuxième doigt 17 du mobile entraîneur 13 lorsque la roue de quantième 19 est dans la position angulaire correspondant au quantième 30, et la dent d'entraînement vers l'arrière 31 se trouve sur cette trajectoire lorsque la roue de quantième est dans la position angulaire correspondant au quantième 31. Lorsqu'en suivant sa trajectoire circulaire, le deuxième doigt rencontre l'une des dents 29 ou 31, il la pousse devant lui de manière à faire pivoter d'un pas la roue de quantième 19.The date wheel 19 is provided with a toothing comprising thirty-one teeth 21, and the first finger 15 is arranged to cause one of the teeth 21 of the toothing to advance by one step at each turn of the driving wheel set 13. will understand that, as the first finger is integral in rotation with the driving wheel 13, and that the latter can be actuated in one direction or the other, it allows the driving of the date wheel backwards as well as forwards . On the other hand, as already mentioned, rocker 27 is provided with a portion of teeth formed by two teeth 29 and 31. Rocker 27 also includes a cam follower 32 which is permanently biased against cam 25. Thus, when the month cam rotates relative to the date wheel 19, the cam follower changes from a dip to a lift of the cam, or vice versa, so that the rocker is caused to pivot between one and the other of two extreme positions depending on whether the current month has 30 or 31 days. When the cam follower presses against a lifting of the month cam, the toothing portion formed by the two teeth 29, 31 is, in the active position, superimposed on the toothing of the date wheel 19, whereas when the follower cam is located in a hollow of the cam, the tooth portion is retracted. As will be seen in greater detail below, the two teeth 29 and 31 are respectively a forward driving tooth and a rearward driving tooth. When the portion of rocker teeth 27 is not in the retracted position, the forward drive tooth 29 is on the path of the second finger 17 of the drive wheel set 13 when the date wheel 19 is in the position corresponding to the date 30, and the rearward drive tooth 31 is on this trajectory when the date wheel is in the angular position corresponding to the date 31. When following its circular trajectory, the second finger meets the one of the teeth 29 or 31, he pushes it in front of him so as to cause the date wheel 19 to pivot by one step.

La roue de quantième 19 comporte en outre un doigt 23 agencé pour coopérer avec l'une des douze dents de l'étoile des mois 33 de manière à l'entraîner d'un pas à chaque tour du mobile de quantième. Autrement dit, le mobile des mois et son étoile 33 sont agencés pour être entraînés d'un douzième de tour pour chaque tour complet effectué par la roue de quantième 19. Comme déjà mentionné, le mobile des mois comporte également un renvoi 35 qui est fixé rigidement en position coaxiale sur l'étoile des mois. La denture du renvoi 35 engrène avec la denture d'une roue des mois 37, elle-même solidaire et coaxiale de la came des mois 25. Le rapport d'engrenage est égal à 1 de sorte que la roue des mois 37 et la came des mois 25 sont entraînées en rotation à la même vitesse que le renvoi 35 et l'étoile des mois 33.The date wheel 19 further comprises a finger 23 arranged to cooperate with one of the twelve teeth of the month star 33 so as to drive it one step at each revolution of the date wheel set. In other words, the month wheel set and its star wheel 33 are arranged to be driven by one twelfth of a turn for each complete turn performed by the date wheel 19. As already mentioned, the month wheel set also includes a reference 35 which is fixed rigidly in a coaxial position on the month star. The toothing of the transmission 35 meshes with the toothing of a month wheel 37, itself integral with and coaxial with the month cam 25. The gear ratio is equal to 1 so that the month wheel 37 and the cam 25 months are rotated at the same speed as the 35 return and the 33 month star.

La figure 3 est une vue d'ensemble en plan du même mécanisme de quantième annuel. La vue de la figure 3 montre en particulier l'affichage de quantième qui, de manière connue en soi, comporte une couronne 41 divisée en 31 secteurs qui portent chacun l'indication d'un des nombres de 1 à 31. La couronne est agencée pour tourner pas-à-pas sous le cadran de la pièce d'horlogerie de manière à ce que les nombres de 1 à 31 soient successivement visibles à travers un guichet (non représenté). La couronne 41 présente encore une denture intérieure 43 formée de 31 dents. L'entraînement pas-à-pas de la couronne 41 est assuré par un mobile entraîneur de l'affichage (référencé 45). Le mobile entraîneur de l'affichage est lui-même actionné à partir de la roue de quantième 19 par l'intermédiaire d'un rouage démultiplicateur 47. On comprendra que, grâce à l'agencement qui vient d'être décrit, le nombre affiché dans le guichet est incrémenté d'une unité chaque fois que la roue de quantième 19 avance d'un pas.The picture 3 is an overall plan view of the same annual calendar mechanism. The sight of the picture 3 shows in particular the date display which, in a manner known per se, comprises a crown 41 divided into 31 sectors each bearing the indication of one of the numbers from 1 to 31. The crown is arranged to turn step by step under the dial of the timepiece so that the numbers from 1 to 31 are successively visible through a window (not shown). Crown 41 also has internal toothing 43 formed of 31 teeth. The step-by-step drive of crown 41 is ensured by a display driving mobile (reference 45). The display driving mobile is itself actuated from the date wheel 19 via a reduction gear train 47. It will be understood that, thanks to the arrangement which has just been described, the displayed number in the aperture is incremented by one unit each time the date wheel 19 advances by one step.

Conformément au mode de réalisation qui fait l'objet du présent exemple, l'affichage comporte également un disque des mois 51 divisé en 12 secteurs qui portent chacun l'indication d'un des douze mois de l'année. Comme le montre la figure 3, le disque des mois 51 est fixé rigidement sur le mobile des mois de sorte qu'il est entraîné pas-à-pas avec l'étoile des mois 33. On comprendra donc que l'affichage du mois passe de l'indication d'un mois à celle du mois suivant chaque fois que le doigt 23 de la roue de quantième 19 revient faire avancer d'un pas une des dents de l'étoile des mois 33.In accordance with the embodiment which is the subject of the present example, the display also includes a month disk 51 divided into 12 sectors which each bear the indication of one of the twelve months of the year. As shown in picture 3 , the month disk 51 is fixed rigidly to the month wheel so that it is driven step by step with the month star 33. It will therefore be understood that the display of the month passes from the indication of one month to that of the following month each time the finger 23 of the date wheel 19 returns to advance one of the teeth of the month star 33 by one step.

Le fonctionnement du mécanisme de quantième du présent exemple va maintenant être décrit de manière à illustrer certains avantages et caractéristiques de l'invention. Conformément à l'invention, la bascule 27 est munie d'une dent d'entraînement vers l'avant 29 et d'une dent d'entraînement vers l'arrière 31. En dehors des épisodes de mise à l'heure et à la date, la dent d'entraînement vers l'avant 29 remplit exactement la même fonction que la dent de la bascule du mécanisme de quantième annuelle de l'art antérieur décrit plus haut. En particulier, lorsque la position angulaire de la came des mois 25 est telle que la portion de denture de la bascule 27 est en position active (correspondant à un mois de 30 jours) et que le mobile de quantième occupe la position angulaire correspondant au 30ème jour du mois, la dent d'entraînement vers l'avant 29 se trouve sur la trajectoire du deuxième doigt 17 du mobile d'entraînement 13.The operation of the date mechanism of the present example will now be described so as to illustrate certain advantages and characteristics of the invention. In accordance with the invention, rocker 27 is provided with a forward drive tooth 29 and a rearward drive tooth 31. Apart from time-setting and date, the forward drive tooth 29 fulfills exactly the same function as the rocker tooth of the annual calendar mechanism of the prior art described above. In particular, when the angular position of the month cam 25 is such that the toothing portion of the rocker 27 is in the active position (corresponding to a month of 30 days) and the calendar wheel occupies the angular position corresponding to the 30th day of the month, the forward drive tooth 29 is on the trajectory of the second finger 17 of the drive mobile 13.

D'autre part, comme déjà mentionné, les dents d'entraînement vers l'avant 29 et vers l'arrière 31 sont séparées l'une de l'autre par un angle égale à un pas de la roue de quantième 19. De plus, la dent d'entraînement vers l'arrière 31 est arrangée un pas derrière la dent d'entraînement vers l'avant 29. Ainsi, lorsque la position angulaire de la came des mois 25 est telle que la portion de denture de la bascule 27 est en position active (correspondant à un mois de 30 jours), Il faut que la roue de quantième 19 occupe la position angulaire correspondant au 31ème jour du mois pour que la dent d'entraînement vers l'arrière 31 se trouve sur la trajectoire du deuxième doigt 17.On the other hand, as already mentioned, the forward 29 and rearward 31 drive teeth are separated from each other by an angle equal to one pitch of the date wheel 19. , rearward drive tooth 31 is arranged one step behind forward drive tooth 29. Thus, when the angular position of month cam 25 is such that rocker tooth portion 27 is in the active position (corresponding to a month of 30 days), the date wheel 19 must occupy the angular position corresponding to the 31st day of the month so that the rearward drive tooth 31 is on the trajectory of the second finger 17.

Le deuxième doigt est solidaire du mobile d'entraînement, et il parcourt sa trajectoire circulaire au rythme d'un tour en 24 heures. Ainsi, quand l'affichage indique le 30ème jour d'un mois de 30 jours, le passage du deuxième doigt 17 a pour effet de faire avancer d'un pas la roue de quantième 19 qui passe ainsi de la position correspondant au 30ème jour du mois à celle correspondant au 31ème. Ensuite, si le mobile d'entraînement tourne encore de quelques degrés, le passage du premier doigt 15 aura pour effet, comme chaque jour, d'entraîner encore d'un pas une des 31 dents du mobile de quantième. Le mobile de quantième passe ainsi de la position correspondant au 31ème jour du mois à celle correspondant au 1er jour du mois suivant. On peut noter que, durant ce processus, la dent d'entraînement vers l'arrière 31 n'a pas été sollicitée. Elle s'est brièvement trouvée sur la trajectoire du deuxième doigt 17, mais comme celui-ci ne passe qu'une fois par jour, la dent d'entraînement vers l'arrière 31 n'a pas eu l'occasion de le rencontrer avant que le mobile de quantième 19 n'avance encore d'un pas jusqu'à la position correspondant au 1er jour du mois.The second finger is integral with the mobile drive, and it traverses its circular trajectory at the rate of one revolution in 24 hours. Thus, when the display indicates the 30th day of a 30-day month, the passage of the second finger 17 has the effect of advancing the date wheel 19 by one step, which thus passes from the position corresponding to the 30th day of the month to that corresponding to the 31st. Then, if the drive wheel rotates a few more degrees, the passage of the first finger 15 will have the effect, as every day, of driving one of the 31 teeth of the date wheel set by one more step. The calendar wheel thus moves from the position corresponding to the 31st day of the month to that corresponding to the 1st day of the following month. It can be noted that, during this process, the rear drive tooth 31 was not stressed. It briefly found itself in the path of the second finger 17, but since this only passes once a day, the rearward drive tooth 31 did not have the opportunity to meet it before that the date mobile 19 still advances by one step to the position corresponding to the 1st day of the month.

Lorsqu'on fait tourner le mobile d'entraînement 13 en arrière, les choses se passent un peu différemment. A chaque tour du mobile d'entraînement 13, le passage du premier doigt 15 a pour effet d'entraîner d'un pas en arrière une des 31 dents du mobile de quantième 19. Lorsque le mobile de quantième vient ainsi occuper la position correspondant au 31ème jour du mois, et que le mois en question compte 30 jours, la dent d'entraînement vers l'arrière se trouve sur la trajectoire du deuxième doigt 17 du mobile d'entraînement 13. Dans ces conditions, si le mobile d'entraînement 13 tourne encore de quelques degrés vers l'arrière, le passage du deuxième doigt 17 aura pour effet d'entraîner d'un pas en arrière la dent d'entraînement vers l'arrière 31, faisant ainsi passer la roue de quantième 19 de la position correspondant au 31ème jour du mois à celle correspondant au 30ème. Ensuite, si le mobile d'entraînement 13 tourne encore d'un peu moins d'un tour vers l'arrière, le passage du premier doigt 15 aura pour effet d'entraîner encore d'un pas en arrière une des 31 dents du mobile de quantième 19. On peut noter que, durant ce processus rétrograde, la dent d'entraînement vers l'avant 29 n'a pas été sollicitée. Elle s'est trouvée sur la trajectoire du deuxième doigt 17 pendant presque un tour du mobile d'entraînement 13, mais comme ce dernier tourne en arrière, le passage du premier doigt 15 a lieu avant le passage du deuxième 17, la dent d'entraînement vers l'arrière 31 n'a donc pas eu l'occasion de rencontrer le deuxième doigt 17 avant que la roue de quantième 19 ne recule encore d'un pas jusqu'à la position correspondant au 29ème jour du mois.When the mobile drive 13 is rotated backwards, things happen a little differently. At each turn of the driving wheel set 13, the passage of the first finger 15 has the effect of dragging a of the 31 teeth of the date mobile 19. When the date mobile thus comes to occupy the position corresponding to the 31st day of the month, and the month in question has 30 days, the rearward drive tooth is on the trajectory of the second finger 17 of the mobile drive 13. Under these conditions, if the mobile drive 13 still rotates a few degrees backwards, the passage of the second finger 17 will have the effect of driving a step backwards the rearward drive tooth 31, thus causing the date wheel 19 to pass from the position corresponding to the 31st day of the month to that corresponding to the 30th. Then, if the drive mobile 13 still rotates a little less than one revolution towards the rear, the passage of the first finger 15 will have the effect of driving one of the 31 teeth of the mobile date 19. It can be noted that, during this retrograde process, the forward drive tooth 29 was not stressed. It was on the path of the second finger 17 for almost one revolution of the mobile drive 13, but as the latter rotates backwards, the passage of the first finger 15 takes place before the passage of the second 17, the tooth of rearward drive 31 has therefore not had the opportunity to encounter the second finger 17 before the date wheel 19 moves back another step to the position corresponding to the 29th day of the month.

On comprendra en outre que diverses modifications et/ou améliorations évidentes pour un homme du métier peuvent être apportées au mécanisme de quantième qui fait l'objet de la présente description sans sortir du cadre de la présente invention définie par les revendications annexées.It will also be understood that various modifications and/or improvements obvious to a person skilled in the art can be made to the date mechanism which is the subject of the present description without departing from the scope of the present invention defined by the appended claims.

Claims (4)

  1. Date mechanism comprising a date wheel assembly (19) provided with a toothing of 31 teeth (21), a date display (41) controlled by the date wheel assembly, a driving wheel assembly (13) arranged to drive the date wheel assembly (19) and bearing a first finger (15) and a second finger (17) which are offset angularly and in height, the first finger being arranged to drive by one step each day one of the teeth of the date wheel assembly (19), a month cam (25) freely mounted to pivot concentrically with the date wheel assembly (19) and arranged to turn by one twelfth of a turn for each turn effected by the date wheel assembly, the date wheel assembly bearing a lever arm (27) provided with a tooth (29), the lever arm being arranged to occupy either an active position or an inactive position according to the angular position of the month cam (25), the tooth (29) of the lever arm being arranged to be located on the trajectory of the second finger (17) of the driving wheel assembly (13) when the lever arm (27) occupies the active position and the date display (41) displays the "30"; characterised in that the first finger (15) and the second finger (17) are fixedly attached to the driving wheel assembly (13), in that said tooth (29) of the lever arm (27) is a tooth for forwards driving, and in that the lever arm is also provided with a tooth for backwards driving (31) arranged to be located on the trajectory of the second finger (17) of the driving wheel assembly (13) when the lever arm occupies the position active and the date display (41) displays the "31".
  2. Date mechanism as claimed in claim 1, characterised in that it comprises a starwheel (33) and a month disc (51) fixedly mounted on the month starwheel, this starwheel being arranged to turn by one twelfth of a turn for each full turn effected by the date wheel assembly (19).
  3. Date mechanism as claimed in claim 2, characterised in that the month cam (25) is kinematically connected to the month starwheel (33) so as to be driven by this starwheel so as to turn at the same rate as this starwheel.
  4. Timepiece comprising a timepiece movement, a mechanism for displaying the hours and minutes arranged to be driven by the timepiece movement, a time-setting means, and a date mechanism as claimed in any one of the preceding claims and arranged to be driven by means of the mechanism for displaying the hours and minutes.
EP19708901.4A 2018-04-04 2019-02-13 Annual date mechanism Active EP3776095B1 (en)

Applications Claiming Priority (2)

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EP18165750.3A EP3550382A1 (en) 2018-04-04 2018-04-04 Annual date mechanism
PCT/IB2019/051143 WO2019193430A1 (en) 2018-04-04 2019-02-13 Annual calendar mechanism

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EP18165750.3A Withdrawn EP3550382A1 (en) 2018-04-04 2018-04-04 Annual date mechanism
EP19708901.4A Active EP3776095B1 (en) 2018-04-04 2019-02-13 Annual date mechanism

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EP4105732A1 (en) 2021-06-16 2022-12-21 Patek Philippe SA Genève Calendar mechanism with display of the seasons for a timepiece
CH719994A1 (en) * 2022-08-29 2024-03-15 Officine Panerai Ag Annual calendar display system

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CH685585B5 (en) 1994-01-21 1996-02-29 Patek Philippe Sa Calendar mechanism.
DE69820052D1 (en) * 1998-09-14 2004-01-08 Piguet Frederic Sa Annual calendar mechanism for clockwork
EP3026504B1 (en) * 2014-11-27 2017-09-27 Société anonyme de la Manufacture d'Horlogerie Audemars Piguet & Cie Annual or perpetual calendar mechanism and timepiece comprising the use thereof

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WO2019193430A1 (en) 2019-10-10
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