EP3567438B1 - Timepiece calendar system - Google Patents

Timepiece calendar system Download PDF

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Publication number
EP3567438B1
EP3567438B1 EP18171542.6A EP18171542A EP3567438B1 EP 3567438 B1 EP3567438 B1 EP 3567438B1 EP 18171542 A EP18171542 A EP 18171542A EP 3567438 B1 EP3567438 B1 EP 3567438B1
Authority
EP
European Patent Office
Prior art keywords
follower
wheel
cam
tooth
calendar
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.)
Active
Application number
EP18171542.6A
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German (de)
French (fr)
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EP3567438A1 (en
Inventor
Denis Rudaz
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.)
Rolex SA
Original Assignee
Rolex SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Rolex SA filed Critical Rolex SA
Priority to EP18171542.6A priority Critical patent/EP3567438B1/en
Priority to US16/398,734 priority patent/US11347186B2/en
Priority to JP2019087982A priority patent/JP7360809B2/en
Priority to CN201910383852.6A priority patent/CN110471271B/en
Publication of EP3567438A1 publication Critical patent/EP3567438A1/en
Application granted granted Critical
Publication of EP3567438B1 publication Critical patent/EP3567438B1/en
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Anticipated expiration legal-status Critical

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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 invention relates to a timepiece calendar system. It also relates to a movement comprising such a system. It also relates to a timepiece, in particular a wristwatch, comprising such a system or such a movement. Finally, it relates to a method of operating such a timepiece calendar system, such a movement or such a timepiece.
  • Such mechanisms generally comprise one or more calendar driving devices shaped to overcome the torques produced by different return or indexing springs taking part in the different calendar display and/or programming devices.
  • the annual or perpetual calendar programming cams are generally designed to actuate a mobile lever, in particular a mobile tooth of a toothing of a calendar mobile or a mobile finger of a calendar driving device.
  • the patent application EP0987609 discloses a cam for programming an annual calendar, designed to drive a rocker pivoting a mobile calendar trainer, which is recalled by a return spring.
  • a cam for programming an annual calendar designed to drive a rocker pivoting a mobile calendar trainer, which is recalled by a return spring.
  • Such a construction requires a large number of parts, in particular springs and levers, and consumes a lot of energy.
  • due to the sequencing of operation of such a mechanism it is very difficult to achieve a perfectly instantaneous date jump of the calendar at the end of a short month.
  • the patent application CH685585 discloses a movable tooth of a date wheel, which is elastically returned against a programming cam arranged concentrically to the date wheel.
  • the mobile tooth comprises a return spring designed to return said tooth against the cam.
  • the programming cam is, moreover, angularly indexed by an elastic jumper.
  • These springs are both actuated by a calendar driving device, which requires additional energy to overcome the resistive torque produced by said springs.
  • EP1351104A1 discloses a calendar system comprising cam surfaces located on a satellite wheel and making it possible to dispense with the use of springs.
  • the patent US3716983 discloses a construction whose principle of operation is similar to that of the device of the application CH685585 .
  • the date wheel is in the form of a date disc provided with internal toothing, one mobile tooth of which is driven by a programming cam via an intermediate rocker.
  • the mobile tooth is elastically returned by a wire spring placed on the date disc.
  • such a construction is complex to implement.
  • the object of the invention is to provide a calendar system making it possible to remedy the aforementioned drawbacks and to improve the watchmaking calendar systems known from the prior art.
  • the invention proposes a watchmaking calendar system that is compact, reliable, simple and minimizes energy losses in operation.
  • a calendar system according to the invention is defined by claim 1.
  • a watch movement according to the invention is defined by claim 12.
  • a timepiece according to the invention is defined by claim 13.
  • a method of operating a calendar system according to the invention is defined by claim 14.
  • the appended figures show, by way of example, two embodiments of a timepiece incorporating a calendar system.
  • the figures 1 to 8 represent a first embodiment of a timepiece.
  • the figure 9 and 10 represent a second embodiment of a timepiece.
  • the figure 11 is a partial section of an exemplary embodiment of a calendar mobile according to a plane XI-XI shown in the figure 4 .
  • the figures 12 and 13 are views of an exemplary embodiment of a cam that can be used in the first embodiment.
  • a first embodiment of a timepiece 300 is described below with reference to the figures 1 to 8 .
  • the timepiece is advantageously a watch, for example a wristwatch.
  • the timepiece includes a 200 watch movement.
  • the watch movement can be of the electronic type or of the mechanical type, in particular of the automatic type.
  • the watch movement includes a watch calendar system 1.
  • the calendar system is for example of the annual type or of the semi-perpetual type or of the perpetual type.
  • the horological movement and/or the calendar system comprises a frame 99.
  • the desmodromic system is arranged so that at least a first position of the cam defines a first position of the follower authorizing the retraction of the tooth and that at least a second position of the cam defines a second position of the follower prohibiting the retraction of the tooth.
  • movement of the cam from a first cam position to a second cam position may cause movement of the follower from a first follower position to a second follower position and movement of the cam from the second position of cam at the first cam position can cause the follower to move from the first follower position to the second follower position.
  • the first wheel set 3 is for example a date wheel set, in particular a date wheel.
  • the first mobile is pivoted on the frame around an axis A1, for example an axis A1 at the center of the movement.
  • the first wheel set includes, for example, date information intended to be indicated to the wearer of the timepiece when it appears, for example, at the level of the dial through an aperture.
  • the first mobile advantageously comprises a toothing 30 of 31 teeth.
  • This toothing may be an internal toothing.
  • This toothing is for example arranged according to a plane P1 represented on the figure 11 .
  • This plane P1 is for example the plane of the first mobile, in particular the plane of disc 3.
  • the calendar system comprises a jumper 8 cooperating with the first mobile to index the first mobile in position relative to the frame.
  • the jumper 8 in particular a head or a beak 8a of the jumper 8, cooperates with the toothing 30 to index the first mobile.
  • the drive tooth 31b of the first mobile is, for example, pivoted on the first mobile about an axis A31.
  • the drive tooth 31b is, for example, arranged along a plane P2 represented on the figure 11 .
  • This plane P2 is for example a plane parallel to the plane P1 and/or parallel to the first mobile.
  • the drive tooth 31b can be made on a retractable finger 31.
  • the retractable finger 31 is, for example, pivoted on the first mobile around the axis A31.
  • the axis A31 is, for example, parallel or substantially parallel to the axis A1.
  • the drive tooth 31b and/or the retractable finger 31 is therefore pivotable between a first retracted position and a second drive position.
  • the retractable finger 31 and / or the drive tooth 31b can be provided, as shown in the figure 4 , guide and/or abutment means comprising, for example, at least one groove 31c formed on the first moving part and at least one pin 31c' attached to the drive tooth 31b or to the retractable finger 31.
  • the guide and/or abutment means may comprise, for example, at least one groove 31c formed on the drive tooth 31b or on the retractable finger 31 and at least one pin 31c' attached to the first mobile.
  • the watchmaking calendar system comprises a driving mobile 5 of the first mobile 3.
  • This driving mobile 5 has the function of driving the first mobile 3 by one step every 24 hours, and possibly by several steps at the end of short months.
  • the drive mobile 5 of the first mobile 3 is for example pivoted on the frame around an axis A5.
  • the axis A5 is for example parallel or substantially parallel to the axis A1 and/or to the axis A31.
  • This drive is preferably of the instant jump type. Alternatively, the drive can be of the dragging type.
  • the drive mobile comprises the first drive finger 5b of the first mobile 3.
  • This first drive finger 5b is therefore arranged so as to cooperate with the first mobile 3, in particular with the drive tooth 31b.
  • all or part of the first drive finger 5b is, for example, in the plane P2.
  • the first drive finger 5b is secured to a calendar cam 6 cooperating with an elastic calendar rocker 7, as shown in the figure 7 .
  • the cooperation of the rocker 7 and the cam 6 allows the instantaneous rotation of the mobile driver 5, in particular the instantaneous rotation of a complete revolution of the mobile driver 5 around the axis A5.
  • This makes it possible to drive the first mobile 3 with an angular step when the first drive finger 5b cooperates with the drive tooth 31b of the first mobile 3.
  • Such cooperation takes place at the end of the short months, it is i.e. at the end of months of 30 days or less.
  • the driving mobile also comprises a second finger 5a for driving the first mobile 3.
  • This second driving finger 5a is therefore arranged so as to cooperate with the first mobile 3, in particular with the toothing 30.
  • the second drive finger 5a is for example in the plane P1.
  • the second drive finger 5a is integral with the calendar cam 6.
  • the second drive finger 5a performs, every 24 hours, an instantaneous or almost instantaneous rotation of a complete turn around the axis A5. This makes it possible to drive the first mobile 3 by one angular step every 24 hours.
  • the date indication can thus be updated every 24 hours.
  • the drive tooth 31b and the first drive finger 5b are arranged and/or configured so that in the drive position of the drive tooth 31b, the first drive finger 5b exerts, on the drive tooth 31b, a mechanical action F tending to retract the tooth and tending to drive the first mobile 3.
  • This action F represented on the figure 2 indeed tends to rotate the first mobile 3 in the counter-clockwise direction around the axis A1 and tends to rotate the tooth 31b drive clockwise around axis A31.
  • the action is neither orthoradial relative to the axis A1, nor radial relative to the axis A1, but substantially inclined relative to these radial and orthoradial directions.
  • the direction of the action F can form an angle between 30° and 60° with the radial and orthoradial directions relative to the axis A1, at the point of application of the action F.
  • the direction of the action F can in particular form an angle equal or substantially equal to 45° with the radial and orthoradial directions relative to the axis A1, at the point of application of the action F.
  • the desmodromic system makes it possible to define the position of the follower from the position of the cam without using a return spring of the follower against the cam.
  • the cam controls, by its position relative to the frame, the position of the follower relative to the frame without a spring recalling the follower against the cam.
  • Cam 2 shown in particular on the figures 12 and 13 is preferably a programming cam.
  • the cam has a crown or ring shape.
  • the cam is advantageously pivoted on the frame around an axis parallel to the axis A1 or around the axis A1.
  • the cam preferably comprises a cam track 20.
  • this cam track comprises a groove 20.
  • This groove 20 can be made along a closed contour.
  • the groove comprises a first flank 20a or first side wall and a second flank 20b or second side wall.
  • the groove may have first portions made along first radii R2 and R2' relative to the axis A1, defining a first follower position and a first drive tooth position 31b.
  • the groove may have second portions made along second radii R1 and R1' relative to the axis A1, defining a second follower position and a second drive tooth position 31b.
  • the groove further comprises connecting portions between the first and second portions.
  • the first flank 20a constitutes a first cam profile.
  • the second flank 20b constitutes a second cam profile.
  • the cam 2 is driven in rotation by the rotation of the first mobile 3, in particular by means of a transmission 9 represented schematically on the figure 1 and 3 .
  • the transmission is for example pivoted on the frame around an axis A9, in particular around an axis A9 parallel or substantially parallel to the axis A1.
  • the first mobile 3 can be provided with an external toothing 32 comprising at least one tooth, preferably two teeth or three teeth or four teeth or five teeth, and the cam 2 can be provided with an internal toothing 22
  • Reference 9 can be a simple pinion comprising a toothing arranged so as to cooperate both with the toothing 32 and with the toothing 22.
  • the reference can be of the Maltese cross type so as to lock the angular position of the cam 2 when the latter is not actuated by the first mobile 3.
  • the reference 9 can, for example, have a first portion comprising a Maltese cross and a second portion comprising a gable. The first and second portions may or may not be separate.
  • the cam 2 can be devoid of any indexing jumper. Indeed, the indexing of the first mobile involves the indexing of the cam 2 due to the kinematic connection, in particular the kinematic connection with less play, of the first mobile 3 and of the cam 2 by means of the reference 9.
  • the first and second cam profiles 20a and 20b make it possible to drive the follower according to a first direction and a second direction respectively, so that the follower 4 can act or not on the drive tooth 31b of the first mobile 3.
  • the cam 2 supports a device for displaying the indication of the months such as, for example, a decal 21 represented on the figure 8 .
  • This decal 21 can bear one or more color markings to give the indication of the current month through one or more windows of a dial, in particular twelve windows.
  • cam 2 can support month indications using alphabetic and/or numeric character strings appearing, for example, in an aperture made in the dial of the timepiece.
  • the follower 4 comprises a pin or a pin 40 intended to be housed in the groove 20.
  • the follower is a rocker, in particular a programming rocker, pivoted on the frame 99 around an axis A4.
  • the axis A4 is for example parallel or substantially parallel to the axis A1.
  • the follower 4 comprises a flank 4a arranged so as to prevent, in particular to prevent by obstacle, the retraction of the drive tooth 31b when the follower is in the second position.
  • the drive tooth 31b and/or the finger 31 comprises a surface or an abutment 31a intended to cooperate by contact with the flank 4a.
  • the first cam profile 20a is provided to act on the pin 40 so that the follower 4 can be driven in a first direction, in particular driven in rotation around the axis A4 in a first direction, in particular clockwise. as shown on the figure 5 .
  • the second cam profile 20b is provided to act on the pin 40 so that the follower 4 can be driven in a second direction, in particular driven in rotation around the axis A4 in a second direction, in particular the direction anti - schedule as shown on the figure 6 .
  • the follower 4 also comprises first stops cooperating with second stops provided on the frame so as to limit the travel of the follower between the first and second positions.
  • the first and second stops may comprise at least one groove 4b provided in the follower to cooperate with a pin with range 4b' attached, for example, to the frame.
  • the first and second abutments may comprise at least one groove provided in the frame to cooperate with a pin with an attached bearing surface, for example, the follower.
  • the groove and the pin can also constitute means for guiding the follower relative to the frame.
  • the geometry of the follower 4 can be adapted according to the dimensions of the first mobile 3 and/or of the cam 2, in particular according to the diameter of the first mobile 3 and/or the diameter of the cam 2.
  • the geometry of the follower can be defined to cooperate with a date disc of given geometry and with a cam capable of displaying a month indication.
  • the geometry of the follower can also be defined to cooperate with a cam of given geometry capable of displaying a month indication and with a date disc.
  • a second embodiment of a timepiece 300' is described below with reference to the figures 9 to 10 .
  • the timepiece is advantageously a watch, for example a wristwatch.
  • the timepiece includes a 200' clock movement.
  • the watch movement can be of the electronic type or of the mechanical type, in particular of the automatic type.
  • the watch movement comprises a watch calendar system 1'.
  • the calendar system is for example of the annual type or of the semi-perpetual type or of the perpetual type.
  • the horological movement and/or the calendar system comprises a frame 99'.
  • an element having an identical or similar function to an element of the first embodiment is referenced using the reference of this element of the first embodiment to which a “'” has been added.
  • the second embodiment differs from the first embodiment in that the cam 2' is a wheel. This wheel is pivoted around axis A1'.
  • the operating principle of the device according to the second embodiment is identical to that of the device of the first mode.
  • the figure 9 and 10 illustrate the second embodiment of the timepiece in a configuration similar to that of the first embodiment of the timepiece illustrated in the figure 1 and 2 .
  • the cam 2' comprises an external toothing 22' cooperating by meshing with a transmission 9'.
  • the wheel 2' can be secured to a month indicator hand or to a month indicator disc.
  • An indexing jumper may optionally be put in place to precisely define the angular positioning of the needle or of the disc.
  • the driving wheel set 5' of the first wheel set 3' is not represented on the figure 9 and 10 .
  • the cam comprises a groove whose sides constitute first and second cam profiles and the follower comprises a pin cooperating with this groove.
  • the cam may alternatively comprise a rib and the follower may include a slot, the rib being received in the slot. The cam profiles are then formed by the sides of the rib.
  • the drive tooth 31b is pivoted on the first mobile.
  • the tooth can be mobile mounted differently on the first mobile.
  • the drive tooth can be mounted in sliding connection on the first mobile.
  • the first drive finger 5b acts on the first mobile to make it advance by an angular step
  • the second drive finger 5a acts on the first mobile to make it advance another angular step.
  • the second drive finger 5a can first act on the first mobile to move it forward by an angular step, then the first drive finger 5b can act on the first mobile to take it forward another angular step.
  • the follower is a rocker pivoted on the frame.
  • the follower may be a slider mounted in sliding connection on the frame.
  • the first and second drive fingers 5a and 5b are integrated within the same drive mobile.
  • the first and second driving fingers 5a and 5b can be integrated within two separate driving mobiles.
  • the first and second drive fingers 5a and 5b are arranged according to two parallel and distinct planes.
  • the first and second drive fingers 5a and 5b as well as the drive tooth and the toothing 30 can be in the same plane.
  • the first drive finger can be shorter than the second drive finger so that the first finger does not interfere with the toothing. The first finger is still long enough to act on the drive tooth when it is in the drive position.
  • the groove 20 is blind. However, a cutout could completely separate the cam into two cam parts.
  • the cam alone determines the first and second positions of the follower.
  • the mobility of the follower can be limited in two opposite directions by the cam.
  • the mobility of the pin 40 or the mobility of the follower can, for example, be delimited in at least one direction by an abutment formed on a draft of the movement, for example on the frame 99.
  • the abutment can, for example, take the form of a cylindrical wall whose radius is equal or substantially equal to R1'.
  • the abutment may, for example, take the form of a cylindrical wall whose radius is equal or substantially equal to R2.
  • the abutment may be one of the abutments formed by the pin 4b'.
  • the pin 40 is housed between the two cam profiles 20a, 20b which are respectively formed along two radii R1, R1' of circles centered on the axis A1, so that the flank 4a of the follower 4 can cooperate by contact with the surface 31a of the drive tooth 31b, the follower being in its second position preventing the retraction of the drive tooth.
  • the drive tooth 31b cannot retract when its head 31b is actuated by the application of the force F through the first drive finger 5b of the mobile drive 5.
  • the contact between the first finger d 5b and the drive tooth 31b thus induces the driving of a step of the first mobile 3.
  • the second drive finger 5a of the driving mobile 5 induces the driving of an additional step of the first mobile 3.
  • the calendar then indicates May 1st .
  • cam 2 rotates around axis A1 clockwise (according to the figures).
  • the pin 40 moves in the groove 20 and the second cam profile 20b acts on the pin to move the follower from its second position preventing the retraction of the drive tooth to its first position. allowing the drive tine to retract.
  • the cam 2 there is an action of the cam 2 on the follower 4 so as to move it from its second position to its first position.
  • the follower On or before May 30, the follower is in its first position.
  • the figure 3 and 4 illustrate the calendar system in a second configuration corresponding to the thirtieth date of a long month. More specifically, the figure 3 and 4 represent the calendar mechanism on May 30.
  • the pin 40 is still housed between the two cam profiles 20a, 20b which are respectively formed along two radii R2, R2' of circles centered on the axis A1, so that the flank 4a of the follower 4 does not can no longer cooperate by contact with the surface 31a of the drive tooth 31b so that it interferes with the first drive finger 5b during its revolution around the axis A5.
  • the follower is in its first position allowing retraction of the drive tooth.
  • the drive tooth 31b is in a position of interference with the trajectory of the first drive finger 5b, it will be subjected to the force F applied by the first drive finger 5b of the drive mobile 5.
  • the drive tooth 31b retracts by rotating clockwise around the axis A31. Any contact between the first drive finger 5b and the drive tooth 31b therefore does not induce driving of the first wheel set 3.
  • the second drive finger 5a of the drive wheel set 5 induces driving of a step from the first mobile 3.
  • the calendar then indicates May 31st.
  • cam 2 rotates around axis A1 clockwise (according to the figures).
  • the pin 40 moves in the groove 20 and the first cam profile 20a acts on the pin to move the follower from its first position allowing the retraction of the drive tooth to its second position. preventing retraction of the drive tine.
  • the follower 4 is again in its second position.
  • the first drive finger 5b exerts on the drive tooth 31b a mechanical action F for driving the first mobile because the retraction of the cam is prohibited here and, when the follower is in the first position, the first drive finger 5b exerts on the drive tooth 31b, a mechanical retraction action of the drive tooth 31b without driving the first mobile 3 because the retraction of the tooth made without resistance while the jumper 8 induces resistance to the drive of the first mobile.
  • the follower, the tooth and the first finger are arranged and/or configured so that in the tooth drive position, the first finger exerts, on the tooth, a mechanical action retracting the tooth or a mechanical action driving the first mover. The consequence of this mechanical action differs according to the position of the follower.

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Description

L'invention concerne un système de calendrier horloger. Elle concerne aussi un mouvement comprenant un tel système. Elle concerne encore une pièce d'horlogerie, notamment une montre bracelet, comprenant un tel système ou un tel mouvement. Elle concerne enfin un procédé de fonctionnement d'un tel système de calendrier horloger, d'un tel mouvement ou d'une telle pièce d'horlogerie.The invention relates to a timepiece calendar system. It also relates to a movement comprising such a system. It also relates to a timepiece, in particular a wristwatch, comprising such a system or such a movement. Finally, it relates to a method of operating such a timepiece calendar system, such a movement or such a timepiece.

On connaît de l'art antérieur des mécanismes de calendriers annuels ou perpétuels. De tels mécanismes comportent généralement un ou plusieurs dispositifs entraîneurs de calendrier conformés pour vaincre les couples produits par différents ressorts de rappel ou d'indexation prenant part aux différents dispositifs d'affichage et/ou de programmation du calendrier.Annual or perpetual calendar mechanisms are known from the prior art. Such mechanisms generally comprise one or more calendar driving devices shaped to overcome the torques produced by different return or indexing springs taking part in the different calendar display and/or programming devices.

Les cames de programmation des calendriers annuels ou perpétuels sont généralement prévues pour actionner un levier mobile, notamment une dent mobile d'une denture d'un mobile de calendrier ou un doigt mobile d'un dispositif entraîneur de calendrier.The annual or perpetual calendar programming cams are generally designed to actuate a mobile lever, in particular a mobile tooth of a toothing of a calendar mobile or a mobile finger of a calendar driving device.

A titre d'exemple, la demande de brevet EP0987609 divulgue une came de programmation d'un calendrier annuel, prévue pour piloter une bascule pivotant un mobile entraîneur de calendrier, qui est rappelée par un ressort de rappel. Une telle construction requiert un nombre important de pièces, notamment des ressorts et des leviers, et consomme beaucoup d'énergie. Par ailleurs, du fait du séquencement de fonctionnement d'un tel mécanisme, il est très difficile de parvenir à un saut de date parfaitement instantané du calendrier à la fin d'un mois court.For example, the patent application EP0987609 discloses a cam for programming an annual calendar, designed to drive a rocker pivoting a mobile calendar trainer, which is recalled by a return spring. Such a construction requires a large number of parts, in particular springs and levers, and consumes a lot of energy. Moreover, due to the sequencing of operation of such a mechanism, it is very difficult to achieve a perfectly instantaneous date jump of the calendar at the end of a short month.

La demande de brevet CH685585 divulgue une dent mobile d'une roue des quantièmes, qui est rappelée élastiquement à l'encontre d'une came de programmation disposée concentriquement à la roue des quantièmes. Pour ce faire, la dent mobile comporte un ressort de rappel prévu pour rappeler ladite dent à l'encontre de la came. La came de programmation est, par ailleurs, indexée angulairement par un sautoir élastique. Ces ressorts sont tous deux actionnés par un dispositif entraîneur de calendrier, qui requiert un surcroît d'énergie pour vaincre le couple résistif produit par lesdits ressorts. On connaît aussi le document EP1351104A1 qui divulgue un système de calendrier comportant des surfaces de came situées sur une roue satellite et permettant de se passer de l'usage de ressorts.The patent application CH685585 discloses a movable tooth of a date wheel, which is elastically returned against a programming cam arranged concentrically to the date wheel. To do this, the mobile tooth comprises a return spring designed to return said tooth against the cam. The programming cam is, moreover, angularly indexed by an elastic jumper. These springs are both actuated by a calendar driving device, which requires additional energy to overcome the resistive torque produced by said springs. We also know the document EP1351104A1 which discloses a calendar system comprising cam surfaces located on a satellite wheel and making it possible to dispense with the use of springs.

Le brevet US3716983 divulgue une construction dont le principe de fonctionnement est similaire à celui du dispositif de la demande CH685585 . La roue des quantièmes se présente sous la forme d'un disque des quantièmes pourvu d'une denture intérieure, dont une dent mobile est pilotée par une came de programmation par le biais d'une bascule intermédiaire. La dent mobile est rappelée élastiquement par un ressort fil disposé sur le disque des quantièmes. Outre les inconvénients précités, une telle construction est complexe à mettre en œuvre.The patent US3716983 discloses a construction whose principle of operation is similar to that of the device of the application CH685585 . The date wheel is in the form of a date disc provided with internal toothing, one mobile tooth of which is driven by a programming cam via an intermediate rocker. The mobile tooth is elastically returned by a wire spring placed on the date disc. Apart from the aforementioned drawbacks, such a construction is complex to implement.

Le but de l'invention est de fournir un système de calendrier permettant de remédier aux inconvénients mentionnés précédemment et d'améliorer les systèmes de calendrier horloger connus de l'art antérieur. En particulier, l'invention propose un système de calendrier horloger compact, fiable, simple et minimisant les pertes énergétiques en fonctionnement.The object of the invention is to provide a calendar system making it possible to remedy the aforementioned drawbacks and to improve the watchmaking calendar systems known from the prior art. In particular, the invention proposes a watchmaking calendar system that is compact, reliable, simple and minimizes energy losses in operation.

Un système de calendrier selon l'invention est défini par la revendication 1.A calendar system according to the invention is defined by claim 1.

Différents modes de réalisation du système de calendrier sont définis par les revendications dépendantes 2 à 11.Different embodiments of the calendar system are defined by dependent claims 2 to 11.

Un mouvement horloger selon l'invention est défini par la revendication 12.A watch movement according to the invention is defined by claim 12.

Une pièce d'horlogerie selon l'invention est définie par la revendication 13.A timepiece according to the invention is defined by claim 13.

Un procédé de fonctionnement d'un système de calendrier selon l'invention est défini par la revendication 14.A method of operating a calendar system according to the invention is defined by claim 14.

Un mode d'exécution du procédé de fonctionnement est défini par la revendication dépendante 15.One embodiment of the method of operation is defined by dependent claim 15.

Les figures annexées représentent, à titre d'exemples, deux modes de réalisation d'une pièce d'horlogerie intégrant un système de calendrier.The appended figures show, by way of example, two embodiments of a timepiece incorporating a calendar system.

Les figures 1 à 8 représentent un premier mode de réalisation d'une pièce d'horlogerie.The figures 1 to 8 represent a first embodiment of a timepiece.

Les figures 9 et 10 représentent un deuxième mode de réalisation d'une pièce d'horlogerie.The figure 9 and 10 represent a second embodiment of a timepiece.

La figure 11 est une section partielle d'un exemple de réalisation d'un mobile de calendrier selon un plan XI-XI représenté sur la figure 4.The figure 11 is a partial section of an exemplary embodiment of a calendar mobile according to a plane XI-XI shown in the figure 4 .

Les figures 12 et 13 sont des vues d'un exemple de réalisation d'une came pouvant être utilisée dans le premier mode de réalisation.The figures 12 and 13 are views of an exemplary embodiment of a cam that can be used in the first embodiment.

Un premier mode de réalisation d'une pièce d'horlogerie 300 est décrit ci-après en référence aux figures 1 à 8. La pièce d'horlogerie est avantageusement une montre, par exemple une montre bracelet. La pièce d'horlogerie comprend un mouvement horloger 200.A first embodiment of a timepiece 300 is described below with reference to the figures 1 to 8 . The timepiece is advantageously a watch, for example a wristwatch. The timepiece includes a 200 watch movement.

Le mouvement horloger peut être du type électronique ou du type mécanique, notamment du type automatique. Le mouvement horloger comprend un système 1 de calendrier horloger. Le système de calendrier est par exemple du type annuel ou du type semi-perpétuel ou du type perpétuel. Le mouvement horloger et/ou le système de calendrier comprend un bâti 99.The watch movement can be of the electronic type or of the mechanical type, in particular of the automatic type. The watch movement includes a watch calendar system 1. The calendar system is for example of the annual type or of the semi-perpetual type or of the perpetual type. The horological movement and/or the calendar system comprises a frame 99.

Le système de calendrier horloger comprend :

  • un premier mobile 3 ;
  • un premier doigt 5b d'entraînement du premier mobile ;
  • une dent 31b d'entraînement du premier mobile, la dent étant montée mobile sur le premier mobile 3 entre une position escamotée et une position d'entraînement ; et
  • un système desmodromique 2, 4 comprenant une came 2 et un suiveur 4 de came.
The watch calendar system includes:
  • a first mobile 3;
  • a first finger 5b for driving the first mobile;
  • a tooth 31b for driving the first wheel set, the tooth being movably mounted on the first wheel set 3 between a retracted position and a drive position; and
  • a desmodromic system 2, 4 comprising a cam 2 and a cam follower 4.

Le système desmodromique est agencé de sorte qu'au moins une première position de la came définit une première position du suiveur autorisant l'escamotage de la dent et qu'au moins une deuxième position de la came définit une deuxième position du suiveur interdisant l'escamotage de la dent. Ainsi, un déplacement de la came d'une première position de came à une deuxième position de came peut provoquer un déplacement du suiveur d'une première position de suiveur à une deuxième position de suiveur et un déplacement de la came de la deuxième position de came à la première position de came peut provoquer un déplacement du suiveur de la première position de suiveur à la deuxième position de suiveur.The desmodromic system is arranged so that at least a first position of the cam defines a first position of the follower authorizing the retraction of the tooth and that at least a second position of the cam defines a second position of the follower prohibiting the retraction of the tooth. Thus, movement of the cam from a first cam position to a second cam position may cause movement of the follower from a first follower position to a second follower position and movement of the cam from the second position of cam at the first cam position can cause the follower to move from the first follower position to the second follower position.

Le premier mobile 3 est par exemple un mobile des quantièmes, notamment un disque des quantièmes. Le premier mobile est pivoté sur le bâti autour d'un axe A1, par exemple un axe A1 au centre du mouvement. Le premier mobile comprend par exemple des informations de quantièmes destinées à être indiquées au porteur de la pièce d'horlogerie lorsqu'elles apparaissent par exemple au niveau du cadran au travers d'un guichet.The first wheel set 3 is for example a date wheel set, in particular a date wheel. The first mobile is pivoted on the frame around an axis A1, for example an axis A1 at the center of the movement. The first wheel set includes, for example, date information intended to be indicated to the wearer of the timepiece when it appears, for example, at the level of the dial through an aperture.

Le premier mobile comprend avantageusement une denture 30 de 31 dents. Cette denture peut être une denture intérieure. Cette denture est par exemple disposée selon un plan P1 représenté sur la figure 11. Ce plan P1 est par exemple le plan du premier mobile, en particulier le plan du disque 3.The first mobile advantageously comprises a toothing 30 of 31 teeth. This toothing may be an internal toothing. This toothing is for example arranged according to a plane P1 represented on the figure 11 . This plane P1 is for example the plane of the first mobile, in particular the plane of disc 3.

Avantageusement, le système de calendrier comprend un sautoir 8 coopérant avec le premier mobile pour indexer le premier mobile en position relativement au bâti. De préférence, le sautoir 8, notamment une tête ou un bec 8a du sautoir 8, coopère avec la denture 30 pour indexer le premier mobile.Advantageously, the calendar system comprises a jumper 8 cooperating with the first mobile to index the first mobile in position relative to the frame. Preferably, the jumper 8, in particular a head or a beak 8a of the jumper 8, cooperates with the toothing 30 to index the first mobile.

La dent 31b d'entraînement du premier mobile est, par exemple, pivotée sur le premier mobile autour d'un axe A31.The drive tooth 31b of the first mobile is, for example, pivoted on the first mobile about an axis A31.

La dent d'entraînement 31b est, par exemple, disposée selon un plan P2 représenté sur la figure 11. Ce plan P2 est par exemple un plan parallèle au plan P1 et/ou parallèle au premier mobile.The drive tooth 31b is, for example, arranged along a plane P2 represented on the figure 11 . This plane P2 is for example a plane parallel to the plane P1 and/or parallel to the first mobile.

La dent d'entraînement 31b peut être réalisée sur un doigt escamotable 31. Dans ce cas, le doigt escamotable 31 est, par exemple, pivoté sur le premier mobile autour de l'axe A31.The drive tooth 31b can be made on a retractable finger 31. In this case, the retractable finger 31 is, for example, pivoted on the first mobile around the axis A31.

L'axe A31 est, par exemple, parallèle ou sensiblement parallèle à l'axe A1.The axis A31 is, for example, parallel or substantially parallel to the axis A1.

La dent d'entraînement 31b et/ou le doigt escamotable 31 est donc mobile en pivotement entre une première position escamotée et une deuxième position d'entraînement.The drive tooth 31b and/or the retractable finger 31 is therefore pivotable between a first retracted position and a second drive position.

Avantageusement, le doigt escamotable 31 et/ou la dent d'entraînement 31b peut être pourvu, comme représenté sur la figure 4, de moyens de guidage et/ou de butée comprenant, par exemple, au moins une rainure 31c formée sur le premier mobile et au moins une goupille 31c' rapportée sur la dent d'entraînement 31b ou sur le doigt escamotable 31. Alternativement, les moyens de guidage et/ou de butée peuvent comprendre, par exemple, au moins une rainure 31c formée sur la dent d'entraînement 31b ou sur le doigt escamotable 31 et au moins une goupille 31c' rapportée sur le premier mobile. Ainsi, la course de la dent d'entraînement 31b et/ou du doigt 31 peut être guidée et/ou limitée entre la position escamotée et la position d'entraînement.Advantageously, the retractable finger 31 and / or the drive tooth 31b can be provided, as shown in the figure 4 , guide and/or abutment means comprising, for example, at least one groove 31c formed on the first moving part and at least one pin 31c' attached to the drive tooth 31b or to the retractable finger 31. Alternatively, the guide and/or abutment means may comprise, for example, at least one groove 31c formed on the drive tooth 31b or on the retractable finger 31 and at least one pin 31c' attached to the first mobile. Thus, the travel of the drive tooth 31b and/or of the finger 31 can be guided and/or limited between the retracted position and the drive position.

Le système de calendrier horloger comprend un mobile entraîneur 5 du premier mobile 3. Ce mobile entraîneur 5 a pour fonction d'entraîner le premier mobile 3 d'un pas toutes les 24 heures, et éventuellement de plusieurs pas à la fin des mois courts. Le mobile entraîneur 5 du premier mobile 3 est par exemple pivoté sur le bâti autour d'un axe A5. L'axe A5 est par exemple parallèle ou sensiblement parallèle à l'axe A1 et/ou à l'axe A31. Cet entraînement est de préférence du type à saut instantané. Alternativement, l'entraînement peut être du type traînant.The watchmaking calendar system comprises a driving mobile 5 of the first mobile 3. This driving mobile 5 has the function of driving the first mobile 3 by one step every 24 hours, and possibly by several steps at the end of short months. The drive mobile 5 of the first mobile 3 is for example pivoted on the frame around an axis A5. The axis A5 is for example parallel or substantially parallel to the axis A1 and/or to the axis A31. This drive is preferably of the instant jump type. Alternatively, the drive can be of the dragging type.

Pour réaliser cet entraînement, le mobile entraîneur comprend le premier doigt 5b d'entraînement du premier mobile 3. Ce premier doigt d'entraînement 5b est donc agencé de sorte à coopérer avec le premier mobile 3, notamment avec la dent d'entraînement 31b. Pour ce faire, tout ou partie du premier doigt d'entraînement 5b se trouve, par exemple, dans le plan P2.To carry out this drive, the drive mobile comprises the first drive finger 5b of the first mobile 3. This first drive finger 5b is therefore arranged so as to cooperate with the first mobile 3, in particular with the drive tooth 31b. To do this, all or part of the first drive finger 5b is, for example, in the plane P2.

Avantageusement, le premier doigt d'entraînement 5b est solidaire d'une came de calendrier 6 coopérant avec une bascule élastique 7 de calendrier, comme représenté sur la figure 7. La coopération de la bascule 7 et de la came 6 permet la rotation instantanée du mobile entraîneur 5, notamment la rotation instantanée d'un tour complet du mobile entraîneur 5 autour de l'axe A5. Ceci permet d'entraîner d'un pas angulaire le premier mobile 3 lorsque le premier doigt d'entraînement 5b coopère avec la dent 31b d'entraînement du premier mobile 3. Une telle coopération a lieu à la fin des mois courts, c'est-à-dire à la fin des mois de 30 jours ou moins.Advantageously, the first drive finger 5b is secured to a calendar cam 6 cooperating with an elastic calendar rocker 7, as shown in the figure 7 . The cooperation of the rocker 7 and the cam 6 allows the instantaneous rotation of the mobile driver 5, in particular the instantaneous rotation of a complete revolution of the mobile driver 5 around the axis A5. This makes it possible to drive the first mobile 3 with an angular step when the first drive finger 5b cooperates with the drive tooth 31b of the first mobile 3. Such cooperation takes place at the end of the short months, it is i.e. at the end of months of 30 days or less.

Avantageusement, pour réaliser l'entraînement du premier mobile 3, le mobile entraîneur comprend également un deuxième doigt 5a d'entraînement du premier mobile 3. Ce deuxième doigt d'entraînement 5a est donc agencé de sorte à coopérer avec le premier mobile 3, en particulier avec la denture 30. Pour ce faire, le deuxième doigt d'entraînement 5a se trouve par exemple dans le plan P1.Advantageously, to carry out the driving of the first mobile 3, the driving mobile also comprises a second finger 5a for driving the first mobile 3. This second driving finger 5a is therefore arranged so as to cooperate with the first mobile 3, in particular with the toothing 30. To do this, the second drive finger 5a is for example in the plane P1.

Avantageusement, le deuxième doigt d'entraînement 5a est solidaire de la came de calendrier 6. Ainsi, le deuxième doigt d'entraînement 5a effectue, toutes les 24 heures, une rotation instantanée ou quasi-instantanée d'un tour complet autour de l'axe A5. Ceci permet d'entraîner d'un pas angulaire le premier mobile 3 toutes les 24 heures. L'indication du quantième peut ainsi être mise à jour toutes les 24 heures.Advantageously, the second drive finger 5a is integral with the calendar cam 6. Thus, the second drive finger 5a performs, every 24 hours, an instantaneous or almost instantaneous rotation of a complete turn around the axis A5. This makes it possible to drive the first mobile 3 by one angular step every 24 hours. The date indication can thus be updated every 24 hours.

Il s'ensuit un entraînement d'un pas angulaire du premier mobile à la fin des mois longs par l'action du seul deuxième doigt d'entraînement 5a et un entraînement de deux pas angulaires du premier mobile à la fin des mois courts par les actions du premier doigt d'entraînement 5b et du deuxième doigt d'entraînement 5a, notamment par l'action du premier doigt d'entraînement 5b puis celle du deuxième doigt d'entraînement 5a.There follows a training of an angular step of the first mobile at the end of the long months by the action of the only second training finger 5a and a drive of two angular steps of the first mobile at the end of the short months by the actions of the first drive finger 5b and of the second drive finger 5a, in particular by the action of the first drive finger 5b then that of the second drive finger 5a.

De préférence, la dent d'entraînement 31b et le premier doigt d'entraînement 5b sont agencés et/ou configurés de sorte qu'en position d'entraînement de la dent d'entraînement 31b, le premier doigt d'entraînement 5b exerce, sur la dent d'entraînement 31b, une action mécanique F tendant à escamoter la dent et tendant à entraîner le premier mobile 3. Cette action F représentée sur la figure 2 (alors que le premier doigt d'entraînement 5b n'est pas en contact avec elle) tend en effet à faire tourner le premier mobile 3 dans le sens anti-horaire autour de l'axe A1 et tend à faire tourner la dent d'entraînement 31b dans le sens horaire autour de l'axe A31. En effet, dans le mode de réalisation représenté construction particulière, l'action est ni orthoradiale relativement à l'axe A1, ni radiale relativement à l'axe A1, mais sensiblement inclinée par rapport à ces directions radiale et orthoradiale. La direction de l'action F peut former un angle compris entre 30° et 60° avec les directions radiale et orthoradiale relativement à l'axe A1, au point d'application de l'action F. La direction de l'action F peut en particulier former un angle égal ou sensiblement égal à 45° avec les directions radiale et orthoradiale relativement à l'axe A1, au point d'application de l'action F.Preferably, the drive tooth 31b and the first drive finger 5b are arranged and/or configured so that in the drive position of the drive tooth 31b, the first drive finger 5b exerts, on the drive tooth 31b, a mechanical action F tending to retract the tooth and tending to drive the first mobile 3. This action F represented on the figure 2 (while the first drive finger 5b is not in contact with it) indeed tends to rotate the first mobile 3 in the counter-clockwise direction around the axis A1 and tends to rotate the tooth 31b drive clockwise around axis A31. Indeed, in the particular construction embodiment represented, the action is neither orthoradial relative to the axis A1, nor radial relative to the axis A1, but substantially inclined relative to these radial and orthoradial directions. The direction of the action F can form an angle between 30° and 60° with the radial and orthoradial directions relative to the axis A1, at the point of application of the action F. The direction of the action F can in particular form an angle equal or substantially equal to 45° with the radial and orthoradial directions relative to the axis A1, at the point of application of the action F.

Le système desmodromique permet de définir la position du suiveur à partir de la position de la came sans utiliser un ressort de rappel du suiveur contre la came. En d'autres termes, la came commande, par sa position relativement au bâti, la position du suiveur relativement au bâti sans qu'un ressort ne rappelle le suiveur contre la came.The desmodromic system makes it possible to define the position of the follower from the position of the cam without using a return spring of the follower against the cam. In other words, the cam controls, by its position relative to the frame, the position of the follower relative to the frame without a spring recalling the follower against the cam.

La came 2 représentée notamment sur les figures 12 et 13 est de préférence une came de programmation. Par exemple, la came a une forme de couronne ou d'anneau. La came est avantageusement pivotée sur le bâti autour d'un axe parallèle à l'axe A1 ou autour de l'axe A1. La came comprend de préférence un chemin de came 20. Avantageusement, ce chemin de came comprend une rainure 20. Cette rainure 20 peut être réalisée le long d'un contour fermé. La rainure comprend un premier flanc 20a ou première paroi latérale et un deuxième flanc 20b ou deuxième paroi latérale. La rainure peut présenter des premières portions réalisées selon des premiers rayons R2 et R2' relativement à l'axe A1, définissant une première position de suiveur et une première position de dent d'entraînement 31b. La rainure peut présenter des deuxièmes portions réalisées selon des deuxièmes rayons R1 et R1' relativement à l'axe A1, définissant une deuxième position de suiveur et une deuxième position de dent d'entraînement 31b. La rainure comprend en outre des portions de raccordement entre les premières et deuxièmes portions.Cam 2 shown in particular on the figures 12 and 13 is preferably a programming cam. For example, the cam has a crown or ring shape. The cam is advantageously pivoted on the frame around an axis parallel to the axis A1 or around the axis A1. The cam preferably comprises a cam track 20. Advantageously, this cam track comprises a groove 20. This groove 20 can be made along a closed contour. The groove comprises a first flank 20a or first side wall and a second flank 20b or second side wall. The groove may have first portions made along first radii R2 and R2' relative to the axis A1, defining a first follower position and a first drive tooth position 31b. The groove may have second portions made along second radii R1 and R1' relative to the axis A1, defining a second follower position and a second drive tooth position 31b. The groove further comprises connecting portions between the first and second portions.

Le premier flanc 20a constitue un premier profil de came. Le deuxième flanc 20b constitue un deuxième profil de came.The first flank 20a constitutes a first cam profile. The second flank 20b constitutes a second cam profile.

Préférentiellement, la came 2 est entraînée en rotation par la rotation du premier mobile 3, notamment par l'intermédiaire d'un renvoi 9 représenté schématiquement sur les figures 1 et 3. Le renvoi est par exemple pivoté sur le bâti autour d'un axe A9, notamment autour d'un axe A9 parallèle ou sensiblement parallèle à l'axe A1.Preferably, the cam 2 is driven in rotation by the rotation of the first mobile 3, in particular by means of a transmission 9 represented schematically on the figure 1 and 3 . The transmission is for example pivoted on the frame around an axis A9, in particular around an axis A9 parallel or substantially parallel to the axis A1.

Pour ce faire, le premier mobile 3 peut être pourvu d'une denture extérieure 32 comprenant au moins une dent, de préférence deux dents ou trois dents ou quatre dents ou cinq dents, et la came 2 peut être pourvue d'une denture intérieure 22. Le renvoi 9 peut être un simple pignon comprenant une denture agencée de sorte à coopérer à la fois avec la denture 32 et avec la denture 22.To do this, the first mobile 3 can be provided with an external toothing 32 comprising at least one tooth, preferably two teeth or three teeth or four teeth or five teeth, and the cam 2 can be provided with an internal toothing 22 Reference 9 can be a simple pinion comprising a toothing arranged so as to cooperate both with the toothing 32 and with the toothing 22.

Alternativement, le renvoi peut être du type croix de Malte de sorte à verrouiller la position angulaire de la came 2 lorsque cette dernière n'est pas actionnée par le premier mobile 3. Ainsi, le renvoi 9 peut, par exemple, présenter une première portion comprenant une croix de Malte et une deuxième portion comprenant un pignon. Les première et deuxième portions peuvent être distinctes ou non. Ainsi, avantageusement, la came 2 peut être dénuée de tout sautoir d'indexation. En effet, l'indexation du premier mobile implique l'indexation de la came 2 du fait de la liaison cinématique, notamment la liaison cinématique à moindre jeu, du premier mobile 3 et de la came 2 par le biais du renvoi 9.Alternatively, the reference can be of the Maltese cross type so as to lock the angular position of the cam 2 when the latter is not actuated by the first mobile 3. Thus, the reference 9 can, for example, have a first portion comprising a Maltese cross and a second portion comprising a gable. The first and second portions may or may not be separate. Thus, advantageously, the cam 2 can be devoid of any indexing jumper. Indeed, the indexing of the first mobile involves the indexing of the cam 2 due to the kinematic connection, in particular the kinematic connection with less play, of the first mobile 3 and of the cam 2 by means of the reference 9.

Les premier et deuxième profils de came 20a et 20b, en particulier au niveau des portions de raccordement entre les premières et deuxièmes portions de la rainure 20, permettent d'entraîner selon respectivement une première direction et une deuxième direction le suiveur, de sorte que le suiveur 4 puisse agir ou non sur la dent d'entraînement 31b du premier mobile 3.The first and second cam profiles 20a and 20b, in particular at the level of the connecting portions between the first and second portions of the groove 20, make it possible to drive the follower according to a first direction and a second direction respectively, so that the follower 4 can act or not on the drive tooth 31b of the first mobile 3.

Préférentiellement, la came 2 supporte un dispositif d'affichage de l'indication des mois comme, par exemple, une décalque 21 représentée sur la figure 8. Cette décalque 21 peut supporter un ou plusieurs marquages de couleur pour donner l'indication du mois en cours à travers une ou plusieurs fenêtres d'un cadran, notamment douze fenêtres. Alternativement, la came 2 peut supporter des indications des mois à l'aide de chaînes de caractères alphabétiques et/ou numériques apparaissant, par exemple, dans un guichet réalisé dans le cadran de la pièce d'horlogerie.Preferably, the cam 2 supports a device for displaying the indication of the months such as, for example, a decal 21 represented on the figure 8 . This decal 21 can bear one or more color markings to give the indication of the current month through one or more windows of a dial, in particular twelve windows. Alternatively, cam 2 can support month indications using alphabetic and/or numeric character strings appearing, for example, in an aperture made in the dial of the timepiece.

Le suiveur 4 comprend une goupille ou un pion 40 destiné à être logé dans la rainure 20.The follower 4 comprises a pin or a pin 40 intended to be housed in the groove 20.

De préférence, le suiveur est une bascule, notamment une bascule de programmation, pivotée sur le bâti 99 autour d'un axe A4. L'axe A4 est par exemple parallèle ou sensiblement parallèle à l'axe A1.Preferably, the follower is a rocker, in particular a programming rocker, pivoted on the frame 99 around an axis A4. The axis A4 is for example parallel or substantially parallel to the axis A1.

Le suiveur 4 comprend un flanc 4a agencé de sorte à empêcher, notamment à empêcher par obstacle, l'escamotage de la dent d'entraînement 31b lorsque le suiveur est en deuxième position. La dent d'entraînement 31b et/ou le doigt 31 comprend une surface ou une butée 31a destinée à coopérer par contact avec le flanc 4a.The follower 4 comprises a flank 4a arranged so as to prevent, in particular to prevent by obstacle, the retraction of the drive tooth 31b when the follower is in the second position. The drive tooth 31b and/or the finger 31 comprises a surface or an abutment 31a intended to cooperate by contact with the flank 4a.

Le premier profil de came 20a est prévu pour agir sur le pion 40 de sorte à ce que le suiveur 4 puisse être entraîné dans un premier sens, en particulier entraîné en rotation autour de l'axe A4 selon un premier sens, notamment le sens horaire comme représenté sur la figure 5. Le deuxième profil de came 20b est prévu pour agir sur le pion 40 de sorte à ce que le suiveur 4 puisse être entraîné dans un deuxième sens, en particulier entraîné en rotation autour de l'axe A4 selon un deuxième sens, notamment le sens anti-horaire comme représenté sur la figure 6.The first cam profile 20a is provided to act on the pin 40 so that the follower 4 can be driven in a first direction, in particular driven in rotation around the axis A4 in a first direction, in particular clockwise. as shown on the figure 5 . The second cam profile 20b is provided to act on the pin 40 so that the follower 4 can be driven in a second direction, in particular driven in rotation around the axis A4 in a second direction, in particular the direction anti - schedule as shown on the figure 6 .

Avantageusement, l'ébat angulaire du suiveur 4 est limité, voire minimisé autant que faire se peut, par les profils de came 20a et 20b qui font office de butée, notamment de butée angulaire, lorsque la came 2 n'est pas actionnée. De préférence, le suiveur 4 comprend en outre des premières butées coopérant avec des deuxièmes butées prévues sur le bâti de sorte à limiter la course du suiveur entre les première et deuxième positions. Les premières et deuxièmes butées peuvent comprendre au moins une rainure 4b prévue dans le suiveur pour coopérer avec une goupille à portée 4b' rapportée, par exemple, sur le bâti. Alternativement, les premières et deuxièmes butées peuvent comprendre au moins une rainure prévue dans le bâti pour coopérer avec une goupille à portée rapportée, par exemple, le suiveur. La rainure et la goupille peuvent encore constituer des moyens de guidage du suiveur relativement au bâti.Advantageously, the angular movement of the follower 4 is limited, or even minimized as much as possible, by the cam profiles 20a and 20b which act as a stop, in particular an angular stop, when the cam 2 is not actuated. Preferably, the follower 4 also comprises first stops cooperating with second stops provided on the frame so as to limit the travel of the follower between the first and second positions. The first and second stops may comprise at least one groove 4b provided in the follower to cooperate with a pin with range 4b' attached, for example, to the frame. Alternatively, the first and second abutments may comprise at least one groove provided in the frame to cooperate with a pin with an attached bearing surface, for example, the follower. The groove and the pin can also constitute means for guiding the follower relative to the frame.

La géométrie du suiveur 4 peut être adaptée en fonction des dimensions du premier mobile 3 et/ou de la came 2, en particulier en fonction du diamètre du premier mobile 3 et/ou du diamètre de la came 2. En particulier, il est possible de moduler la disposition de l'affichage des mois indépendamment de la disposition de l'affichage des quantièmes par le biais d'un suiveur 4 donné. Par exemple, pour un disque des quantièmes 3 donné, il peut être possible d'agencer différentes cames 2 supportant des dispositifs d'affichage de l'indication des mois de différentes dimensions par le biais de différents suiveurs. Ainsi, la géométrie du suiveur peut être définie pour coopérer avec un disque des quantièmes de géométrie donnée et avec une came apte à afficher une indication de mois. La géométrie du suiveur peut également être définie pour coopérer avec une came de géométrie donnée apte à afficher une indication de mois et avec un disque des quantièmes.The geometry of the follower 4 can be adapted according to the dimensions of the first mobile 3 and/or of the cam 2, in particular according to the diameter of the first mobile 3 and/or the diameter of the cam 2. In particular, it is possible to modulate the layout of the month display independently of the layout of the date display by means of a given follower 4. For example, for a given date disc 3, it may be possible to arrange different cams 2 supporting month indication display devices of different dimensions by means of different followers. Thus, the geometry of the follower can be defined to cooperate with a date disc of given geometry and with a cam capable of displaying a month indication. The geometry of the follower can also be defined to cooperate with a cam of given geometry capable of displaying a month indication and with a date disc.

Un deuxième mode de réalisation d'une pièce d'horlogerie 300' est décrit ci-après en référence aux figures 9 à 10. La pièce d'horlogerie est avantageusement une montre, par exemple une montre bracelet. La pièce d'horlogerie comprend un mouvement horloger 200'.A second embodiment of a timepiece 300' is described below with reference to the figures 9 to 10 . The timepiece is advantageously a watch, for example a wristwatch. The timepiece includes a 200' clock movement.

Le mouvement horloger peut être du type électronique ou du type mécanique, notamment du type automatique. Le mouvement horloger comprend un système 1' de calendrier horloger. Le système de calendrier est par exemple du type annuel ou du type semi-perpétuel ou du type perpétuel. Le mouvement horloger et/ou le système de calendrier comprend un bâti 99'.The watch movement can be of the electronic type or of the mechanical type, in particular of the automatic type. The watch movement comprises a watch calendar system 1'. The calendar system is for example of the annual type or of the semi-perpetual type or of the perpetual type. The horological movement and/or the calendar system comprises a frame 99'.

Dans ce deuxième mode de réalisation, un élément ayant une fonction identique ou similaire à un élément du premier mode de réalisation est référencé à l'aide de la référence de cet élément du premier mode de réalisation à laquelle on a ajouté un « ' ».In this second embodiment, an element having an identical or similar function to an element of the first embodiment is referenced using the reference of this element of the first embodiment to which a “'” has been added.

Le deuxième mode de réalisation diffère du premier mode de réalisation en ce que la came 2' est une roue. Cette roue est pivotée autour de l'axe A1'. Le principe de fonctionnement du dispositif selon le deuxième mode de réalisation est identique à celui du dispositif du premier mode. Par ailleurs, les figures 9 et 10 illustrent le deuxième mode de réalisation de la pièce d'horlogerie dans une configuration semblable à celle du premier mode de réalisation de la pièce d'horlogerie illustré sur les figures 1 et 2.The second embodiment differs from the first embodiment in that the cam 2' is a wheel. This wheel is pivoted around axis A1'. The operating principle of the device according to the second embodiment is identical to that of the device of the first mode. Furthermore, the figure 9 and 10 illustrate the second embodiment of the timepiece in a configuration similar to that of the first embodiment of the timepiece illustrated in the figure 1 and 2 .

La came 2' comprend une denture extérieure 22' coopérant par engrènement avec un renvoi 9'.The cam 2' comprises an external toothing 22' cooperating by meshing with a transmission 9'.

Dans ce deuxième mode de réalisation, la roue 2' peut être solidaire d'une aiguille indicatrice des mois ou d'un disque indicateur des mois. Un sautoir d'indexation peut éventuellement être mis en place pour définir précisément le positionnement angulaire de l'aiguille ou du disque.In this second embodiment, the wheel 2' can be secured to a month indicator hand or to a month indicator disc. An indexing jumper may optionally be put in place to precisely define the angular positioning of the needle or of the disc.

Le mobile d'entraînement 5' du premier mobile 3' n'est pas représenté sur les figures 9 et 10.The driving wheel set 5' of the first wheel set 3' is not represented on the figure 9 and 10 .

Dans les modes de réalisation et variantes décrits précédemment, la came comprend une rainure dont les flancs constituent des premier et deuxième profils de came et le suiveur comprend une goupille coopérant avec cette rainure. Toutefois, la came peut alternativement comprendre une nervure et le suiveur peut comprendre une fente, la nervure étant logée dans la fente. Les profils de came sont alors constitués par les flancs de la nervure.In the embodiments and variants described previously, the cam comprises a groove whose sides constitute first and second cam profiles and the follower comprises a pin cooperating with this groove. However, the cam may alternatively comprise a rib and the follower may include a slot, the rib being received in the slot. The cam profiles are then formed by the sides of the rib.

Dans les modes de réalisation et variantes décrits précédemment, la dent d'entraînement 31b est pivotée sur le premier mobile. Toutefois, la dent peut être montée mobile différemment sur le premier mobile. Notamment, la dent d'entraînement peut être montée en liaison glissière sur le premier mobile.In the embodiments and variants described above, the drive tooth 31b is pivoted on the first mobile. However, the tooth can be mobile mounted differently on the first mobile. In particular, the drive tooth can be mounted in sliding connection on the first mobile.

Dans les modes de réalisation et variantes décrits précédemment, à la fin des mois courts, le premier doigt d'entraînement 5b agit sur le premier mobile pour le faire avancer d'un pas angulaire, puis le deuxième doigt d'entraînement 5a agit sur le premier mobile pour le faire avancer d'un autre pas angulaire. Toutefois, à la fin des mois courts, le deuxième doigt d'entraînement 5a peut d'abord agir sur le premier mobile pour le faire avancer d'un pas angulaire, puis le premier doigt d'entraînement 5b peut agir sur le premier mobile pour le faire avancer d'un autre pas angulaire.In the embodiments and variants described above, at the end of the short months, the first drive finger 5b acts on the first mobile to make it advance by an angular step, then the second drive finger 5a acts on the first mobile to make it advance another angular step. However, at the end of the short months, the second drive finger 5a can first act on the first mobile to move it forward by an angular step, then the first drive finger 5b can act on the first mobile to take it forward another angular step.

Dans les modes de réalisation et variantes décrits précédemment, le suiveur est une bascule pivotée sur le bâti. Toutefois, le suiveur peut être un coulisseau monté en liaison glissière sur le bâti.In the embodiments and variants described previously, the follower is a rocker pivoted on the frame. However, the follower may be a slider mounted in sliding connection on the frame.

Dans les modes de réalisation et variantes décrits précédemment, les premier et deuxième doigts d'entraînement 5a et 5b sont intégrés au sein d'un même mobile entraîneur. Toutefois, les premier et deuxième doigts d'entraînement 5a et 5b peuvent être intégrés au sein de deux mobiles entraîneurs distincts.In the embodiments and variants described above, the first and second drive fingers 5a and 5b are integrated within the same drive mobile. However, the first and second driving fingers 5a and 5b can be integrated within two separate driving mobiles.

Dans les modes de réalisation et variantes décrits précédemment, les premier et deuxième doigts d'entraînement 5a et 5b se trouvent disposés selon deux plans parallèles et distincts. Toutefois, les premier et deuxième doigts d'entraînement 5a et 5b ainsi que la dent d'entraînement et la denture 30 peuvent se trouver dans un même plan. Dans ce cas, le premier doigt d'entraînement peut être plus court que le deuxième doigt d'entraînement de sorte que le premier doigt n'interfère pas avec la denture. Le premier doigt est tout de même suffisamment long pour agir sur la dent d'entraînement lorsqu'elle se trouve en position d'entraînement.In the embodiments and variants described previously, the first and second drive fingers 5a and 5b are arranged according to two parallel and distinct planes. However, the first and second drive fingers 5a and 5b as well as the drive tooth and the toothing 30 can be in the same plane. In this case, the first drive finger can be shorter than the second drive finger so that the first finger does not interfere with the toothing. The first finger is still long enough to act on the drive tooth when it is in the drive position.

Dans les modes de réalisation et variantes décrits précédemment, la rainure 20 est borgne. Toutefois, une découpe pourrait complètement séparer la came dans deux parties de came.In the embodiments and variants described above, the groove 20 is blind. However, a cutout could completely separate the cam into two cam parts.

Dans les modes de réalisation et variantes décrits précédemment, la came détermine seule les première et deuxième positions du suiveur. Ainsi, la mobilité du suiveur peut être limitée dans deux sens opposés par la came. Toutefois, la mobilité du pion 40 ou la mobilité du suiveur peut, par exemple, être délimitée dans au moins un sens par une butée formée sur une ébauche du mouvement, par exemple sur le bâti 99. La butée peut, par exemple, prendre la forme d'une paroi cylindrique dont le rayon est égal ou sensiblement égal à R1'. Alternativement ou complémentairement, la butée peut, par exemple, prendre la forme d'une paroi cylindrique dont le rayon est égal ou sensiblement égal à R2. Alternativement encore, la butée peut être l'une des butées constituées par la goupille 4b'.In the embodiments and variants described above, the cam alone determines the first and second positions of the follower. Thus, the mobility of the follower can be limited in two opposite directions by the cam. However, the mobility of the pin 40 or the mobility of the follower can, for example, be delimited in at least one direction by an abutment formed on a draft of the movement, for example on the frame 99. The abutment can, for example, take the form of a cylindrical wall whose radius is equal or substantially equal to R1'. Alternatively or additionally, the abutment may, for example, take the form of a cylindrical wall whose radius is equal or substantially equal to R2. Alternatively again, the abutment may be one of the abutments formed by the pin 4b'.

Un mode d'exécution d'un procédé de fonctionnement de la pièce d'horlogerie et/ou du mouvement et/ou du système de calendrier est décrit ci-après.One mode of execution of a method of operating the timepiece and/or the movement and/or the calendar system is described below.

On suppose que le système de calendrier se trouve initialement dans le premier état ou la première configuration représentée sur les figures 1 et 2. Cette configuration correspond au trentième quantième d'un mois court, par exemple le 30 avril.It is assumed that the calendar system is initially in the first state or configuration shown on the figure 1 and 2 . This configuration corresponds to the thirtieth date of a short month, for example April 30.

Dans cette première configuration, le pion 40 est logé entre les deux profils de came 20a, 20b qui sont respectivement formés selon deux rayons R1, R1' de cercles centrés sur l'axe A1, de sorte que le flanc 4a du suiveur 4 puisse coopérer par contact avec la surface 31a de la dent d'entraînement 31b, le suiveur se trouvant dans sa deuxième position interdisant l'escamotage de la dent d'entraînement. Ainsi, la dent d'entraînement 31b ne peut pas s'escamoter lorsque sa tête 31b est actionnée par l'application de la force F par le biais du premier doigt d'entraînement 5b du mobile entraîneur 5. Le contact entre le premier doigt d'entraînement 5b et la dent d'entraînement 31b induit ainsi l'entraînement d'un pas du premier mobile 3. Le deuxième doigt d'entraînement 5a du mobile entraîneur 5 induit quant à lui l'entraînement d'un pas supplémentaire du premier mobile 3. Le calendrier indique alors le 1er mai.In this first configuration, the pin 40 is housed between the two cam profiles 20a, 20b which are respectively formed along two radii R1, R1' of circles centered on the axis A1, so that the flank 4a of the follower 4 can cooperate by contact with the surface 31a of the drive tooth 31b, the follower being in its second position preventing the retraction of the drive tooth. Thus, the drive tooth 31b cannot retract when its head 31b is actuated by the application of the force F through the first drive finger 5b of the mobile drive 5. The contact between the first finger d 5b and the drive tooth 31b thus induces the driving of a step of the first mobile 3. The second drive finger 5a of the driving mobile 5 induces the driving of an additional step of the first mobile 3. The calendar then indicates May 1st .

Au fil du mois de mai, la came 2 tourne autour de l'axe A1 dans le sens horaire (selon les figures). Lors de ce déplacement de la came, la goupille 40 se déplace dans la rainure 20 et le deuxième profil de came 20b agit sur la goupille pour déplacer le suiveur de sa deuxième position interdisant l'escamotage de la dent d'entraînement à sa première position autorisant l'escamotage de la dent d'entraînement. Ainsi, il se produit une action de la came 2 sur le suiveur 4 de sorte à le faire passer de sa deuxième position à sa première position. Le 30 mai ou avant cette date, le suiveur se trouve dans sa première position.As the month of May progresses, cam 2 rotates around axis A1 clockwise (according to the figures). During this displacement of the cam, the pin 40 moves in the groove 20 and the second cam profile 20b acts on the pin to move the follower from its second position preventing the retraction of the drive tooth to its first position. allowing the drive tine to retract. Thus, there is an action of the cam 2 on the follower 4 so as to move it from its second position to its first position. On or before May 30, the follower is in its first position.

Les figures 3 et 4 illustrent le système de calendrier dans une deuxième configuration correspondant au trentième quantième d'un mois long. Plus spécifiquement, les figures 3 et 4 représentent le mécanisme de calendrier le 30 mai.The figure 3 and 4 illustrate the calendar system in a second configuration corresponding to the thirtieth date of a long month. More specifically, the figure 3 and 4 represent the calendar mechanism on May 30.

Dans cette deuxième configuration, le pion 40 est toujours logé entre les deux profils de came 20a, 20b qui sont respectivement formés selon deux rayons R2, R2' de cercles centrés sur l'axe A1, de sorte que le flanc 4a du suiveur 4 ne puisse plus coopérer par contact avec la surface 31a de la dent d'entraînement 31b de sorte qu'elle interfère avec le premier doigt d'entraînement 5b lors de sa révolution autour de l'axe A5. Le suiveur se trouve dans sa première position autorisant l'escamotage de la dent d'entraînement. Ainsi, si la dent d'entraînement 31b se trouve dans une position d'interférence avec la trajectoire du premier doigt d'entraînement 5b, elle va être soumise à la force F appliquée par le premier doigt d'entraînement 5b du mobile entraîneur 5. Sous l'effet de cette force F, la dent d'entraînement 31b s'escamote en tournant dans le sens horaire autour de l'axe A31. L'éventuel contact entre le premier doigt d'entraînement 5b et la dent d'entraînement 31b n'induit donc pas d'entraînement du premier mobile 3. Le deuxième doigt d'entraînement 5a du mobile entraîneur 5 induit quant à lui l'entraînement d'un pas du premier mobile 3. Le calendrier indique alors le 31 mai.In this second configuration, the pin 40 is still housed between the two cam profiles 20a, 20b which are respectively formed along two radii R2, R2' of circles centered on the axis A1, so that the flank 4a of the follower 4 does not can no longer cooperate by contact with the surface 31a of the drive tooth 31b so that it interferes with the first drive finger 5b during its revolution around the axis A5. The follower is in its first position allowing retraction of the drive tooth. Thus, if the drive tooth 31b is in a position of interference with the trajectory of the first drive finger 5b, it will be subjected to the force F applied by the first drive finger 5b of the drive mobile 5. Under the effect of this force F, the drive tooth 31b retracts by rotating clockwise around the axis A31. Any contact between the first drive finger 5b and the drive tooth 31b therefore does not induce driving of the first wheel set 3. The second drive finger 5a of the drive wheel set 5 induces driving of a step from the first mobile 3. The calendar then indicates May 31st.

A partir de cette date et/ou au fil du mois de juin, la came 2 tourne autour de l'axe A1 dans le sens horaire (selon les figures). Lors de ce déplacement de la came, la goupille 40 se déplace dans la rainure 20 et le premier profil de came 20a agit sur la goupille pour déplacer le suiveur de sa première position autorisant l'escamotage de la dent d'entraînement à sa deuxième position interdisant l'escamotage de la dent d'entraînement. Ainsi, il se produit une action de la came 2 sur le suiveur 4 de sorte à le faire passer de sa première position à sa deuxième position. Le 30 juin ou avant cette date, le suiveur se trouve de nouveau dans sa deuxième position.From this date and/or throughout the month of June, cam 2 rotates around axis A1 clockwise (according to the figures). During this movement of the cam, the pin 40 moves in the groove 20 and the first cam profile 20a acts on the pin to move the follower from its first position allowing the retraction of the drive tooth to its second position. preventing retraction of the drive tine. Thus, there is an action of the cam 2 on the follower 4 so as to make it pass from its first position to its second place. On or before June 30, the follower is again in its second position.

Comme décrit précédemment, lorsque le suiveur est en deuxième position, le premier doigt d'entraînement 5b exerce sur la dent d'entraînement 31b une action mécanique F d'entraînement du premier mobile car l'escamotage de la came est ici interdit et, lorsque le suiveur est en première position, le premier doigt d'entraînement 5b exerce sur la dent d'entraînement 31b, une action mécanique d'escamotage de la dent d'entraînement 31b sans entraîner le premier mobile 3 car l'escamotage de la dent se fait sans résistance alors que le sautoir 8 induit une résistance à l'entraînement du premier mobile. Ainsi, le suiveur, la dent et le premier doigt sont agencés et/ou configurés de sorte qu'en position d'entraînement de la dent, le premier doigt exerce, sur la dent, une action mécanique escamotant la dent ou une action mécanique entraînant le premier mobile. La conséquence de cette action mécanique diffère selon la position du suiveur.As described previously, when the follower is in the second position, the first drive finger 5b exerts on the drive tooth 31b a mechanical action F for driving the first mobile because the retraction of the cam is prohibited here and, when the follower is in the first position, the first drive finger 5b exerts on the drive tooth 31b, a mechanical retraction action of the drive tooth 31b without driving the first mobile 3 because the retraction of the tooth made without resistance while the jumper 8 induces resistance to the drive of the first mobile. Thus, the follower, the tooth and the first finger are arranged and/or configured so that in the tooth drive position, the first finger exerts, on the tooth, a mechanical action retracting the tooth or a mechanical action driving the first mover. The consequence of this mechanical action differs according to the position of the follower.

Les solutions décrites précédemment permettent de minimiser le nombre des ressorts utilisés pour afficher les informations de calendrier. Ainsi, l'énergie utilisée pour afficher les informations de calendrier peut être minimisée. On limite en particulier l'énergie accumulée dans le système de calendrier. La limitation de la consommation énergétique permet de limiter les perturbations de l'oscillateur balancier-spiral pouvant nuire à la précision de la pièce d'horlogerie.The solutions described above make it possible to minimize the number of springs used to display the calendar information. Thus, the energy used to display the calendar information can be minimized. In particular, the energy accumulated in the calendar system is limited. The limitation of the energy consumption makes it possible to limit the disturbances of the balance-spring oscillator which can harm the precision of the timepiece.

Ces solutions sont particulièrement simples à mettre en œuvre. Par ailleurs, ces solutions permettent avantageusement de moduler l'affichage de l'indication des mois, notamment en regard de celle des quantièmes. Ceci peut être réalisé indépendamment de tout ressort de rappel ou d'indexation additionnel.These solutions are particularly simple to implement. Moreover, these solutions advantageously make it possible to modulate the display of the indication of the months, in particular opposite that of the dates. This can be achieved independently of any additional return or indexing spring.

Claims (15)

  1. A system (1) for a watch calendar, the system comprising:
    - a first wheel (3);
    - a first finger (5b) for driving the first wheel;
    - a tooth (31b) for driving the first wheel, the tooth being movably mounted on the first wheel (3) between a retracted position and a driving position;
    - a desmodromic system (2, 4) comprising a cam (2) and a cam follower (4),
    the desmodromic system being arranged in such a way that:
    - the desmodromic system permits the position of the follower to be defined on the basis of the position of the cam without utilizing a spring for the return of the follower against the cam,
    - at least a first position of the cam defines a first position of the follower permitting the retraction of the tooth, and
    - at least a second position of the cam defines a second position of the follower preventing the retraction of the tooth.
  2. The system (1) for a watch calendar as claimed in the preceding claim, wherein the follower, the tooth and the first finger are arranged and/or are configured in such a way that, in the driving position of the tooth, the first finger exerts, on the tooth, a mechanical action retracting the tooth or driving the first wheel.
  3. The system (1) for a watch calendar as claimed in one of the preceding claims, wherein the tooth is pivoted on the first wheel about a first axis (A31) or wherein the tooth is mounted in sliding engagement on the first wheel.
  4. The system (1) for a watch calendar as claimed in one of the preceding claims, wherein the system comprises a framework (99) and wherein the follower is a lever pivoted on the framework about a second axis (A4) or the follower is a slider mounted in sliding engagement on the framework.
  5. The system (1) for a watch calendar as claimed in one of the preceding claims, wherein the follower comprises a flank (4a) arranged in such a way as to prevent, in particular to prevent by positive engagement, the retraction of the tooth when the follower is in the second position.
  6. The system (1) for a watch calendar as claimed in one of the preceding claims, wherein the first wheel is a calendar day wheel, in particular a calendar day disk, and/or wherein the cam is a crown or a wheel comprising a groove (20) and the follower comprising a pin or a peg (40) housed in the groove and/or wherein the cam is a crown or a wheel comprising a rib and the follower comprising a pin or a peg equipped with a slot, the rib being housed in the slot.
  7. The system (1) for a watch calendar as claimed in one of the preceding claims, wherein the follower comprises first abutments cooperating with second abutments provided on a framework in such a way as to limit the travel of the follower between the first and second positions, and/or wherein the tooth comprises third abutments cooperating with fourth abutments provided on the first wheel in such a way as to limit the travel of the tooth between the retracted position and the driving position.
  8. The system (1) for a watch calendar as claimed in one of the preceding claims, wherein the first wheel comprises a toothing (30) having 31 teeth, and/or wherein the system comprises a second driving wheel (5), of which a second finger (5a) is arranged in such a way as to drive the first wheel (3).
  9. The system (1) for a watch calendar as claimed in the preceding claim, wherein the second driving wheel (5) comprises the first finger (5b).
  10. The system (1) for a watch calendar as claimed in one of the preceding claims, wherein the system comprises an intermediate wheel (9) arranged in such a way that the cam is driven by the movement of the first wheel, the intermediate wheel comprising elements of the kinematic connection of the cam to the first wheel, in particular a first toothing cooperating with a toothing (22) of the cam and a second toothing cooperating with a toothing (32) of the first wheel.
  11. The system (1) for a watch calendar as claimed in one of the preceding claims, wherein the cam comprises elements for the display of information pertaining to the month, in particular characters and/or a decal intended to cooperate with a dial, in particular one or a plurality of apertures of the dial.
  12. A watch movement (200) comprising a system as claimed in one of the preceding claims.
  13. A timepiece (300), in particular a wristwatch, comprising a system (100) as claimed in one of claims 1 to 11 and/or a watch movement as claimed in claim 12.
  14. A method of operation of a system for a watch calendar as claimed in one of claims 1 to 11 or of a watch movement as claimed in claim 12 or of a timepiece as claimed in claim 13, the method comprising the following stages:
    - action of the cam (2) on the follower (4) in such a way as to cause it to pass from the first position to the second position, and
    - action of the cam (2) on the follower (4) in such a way as to cause it to pass from the second position to the first position.
  15. The method of operation of a system for a watch calendar as claimed in the preceding claim, wherein, when the follower is in the second position, the first finger exerts, on the tooth a mechanical action for driving the first wheel and wherein, when the follower is in the first position, the first finger exerts on the tooth, a mechanical action for the retraction of the tooth without driving the first wheel.
EP18171542.6A 2018-05-09 2018-05-09 Timepiece calendar system Active EP3567438B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP18171542.6A EP3567438B1 (en) 2018-05-09 2018-05-09 Timepiece calendar system
US16/398,734 US11347186B2 (en) 2018-05-09 2019-04-30 System for a watch calendar
JP2019087982A JP7360809B2 (en) 2018-05-09 2019-05-08 System for small clock calendar
CN201910383852.6A CN110471271B (en) 2018-05-09 2019-05-09 System for calendar

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18171542.6A EP3567438B1 (en) 2018-05-09 2018-05-09 Timepiece calendar system

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EP18171542.6A Active EP3567438B1 (en) 2018-05-09 2018-05-09 Timepiece calendar system

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EP4187329A1 (en) 2021-11-30 2023-05-31 Rolex Sa System for transmitting movement for clock calendar
EP4187328A1 (en) 2021-11-30 2023-05-31 Rolex Sa Timepiece calendar system
EP4187327A1 (en) 2021-11-30 2023-05-31 Rolex Sa Timepiece calendar system

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JPS515594B1 (en) 1970-06-22 1976-02-20
JPS5948356B2 (en) * 1977-08-22 1984-11-26 シチズン時計株式会社 Month-end uncensored calendar mechanism
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
DE60230011D1 (en) * 2002-04-02 2009-01-08 Nardin Ulysse Sa Device with program wheel for the mechanism of a perpetual calendar as well as clock with such mechanism
DE602007012856D1 (en) 2007-07-13 2011-04-14 Omega Sa Instantaneous display mechanism for watch
EP2428856B1 (en) 2010-11-03 2014-01-22 Rolex Sa Timepiece
EP2490082B1 (en) * 2011-02-17 2013-09-18 Glashütter Uhrenbetrieb GmbH Calendar mechanism
CH705737B1 (en) * 2011-11-11 2015-12-31 Gfpi S A drive mechanism of an indicator of information relating to a timepiece movement.
EP2843483A1 (en) * 2013-08-27 2015-03-04 Manufacture et fabrique de montres et chronomètres Ulysse Nardin Le Locle SA Date mechanism
JP6788345B2 (en) 2015-01-12 2020-11-25 ロレックス・ソシエテ・アノニムＲｏｌｅｘ Ｓａ A device that drives the mobile of the clock calendar mechanism
CH711749A1 (en) * 2015-11-13 2017-05-15 Gfpi Sa Calendar mechanism for timepiece.
EP3540524B1 (en) * 2018-03-13 2022-02-16 Montres Breguet S.A. Governed jumping display mechanism in a timepiece

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US20190346813A1 (en) 2019-11-14
CN110471271B (en) 2022-05-10
US11347186B2 (en) 2022-05-31
JP2020003476A (en) 2020-01-09
JP7360809B2 (en) 2023-10-13
EP3567438A1 (en) 2019-11-13
CN110471271A (en) 2019-11-19

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