EP3644130B1 - Date mechanism - Google Patents

Date mechanism Download PDF

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Publication number
EP3644130B1
EP3644130B1 EP18201841.6A EP18201841A EP3644130B1 EP 3644130 B1 EP3644130 B1 EP 3644130B1 EP 18201841 A EP18201841 A EP 18201841A EP 3644130 B1 EP3644130 B1 EP 3644130B1
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EP
European Patent Office
Prior art keywords
month
thirty
day
tooth
rotation
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.)
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Application number
EP18201841.6A
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German (de)
French (fr)
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EP3644130A1 (en
Inventor
Kadmiel WHARTON
Julien GATINET
Stéphane Berthoud
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Dubois and Depraz SA
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Dubois and Depraz SA
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Priority to EP18201841.6A priority Critical patent/EP3644130B1/en
Publication of EP3644130A1 publication Critical patent/EP3644130A1/en
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Publication of EP3644130B1 publication Critical patent/EP3644130B1/en
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Classifications

    • 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
    • G04B19/25306—Independent date indicating devices activated by hand or by clockwork, e.g. calendar watches
    • G04B19/25313—Independent date indicating devices activated by hand or by clockwork, e.g. calendar watches driven or released by a steady movement
    • G04B19/2532—Independent date indicating devices activated by hand or by clockwork, e.g. calendar watches driven or released by a steady movement automatically corrected at the end of mounths having less than 31 days
    • 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
    • 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

Definitions

  • the present invention relates to a date mechanism for a timepiece comprising a display crown bearing date indications intended to be designated successively in order to be read, typically through a window or using a pointer.
  • the patent application EP 1 596 261 A1 describes an annual calendar mechanism for a timepiece comprising an internally toothed date display crown bearing indications intended to be read through a window.
  • the drive of this display ring in rotation under the window is achieved on the one hand, by daily actuation of its internal teeth by a first finger of a drive member and on the other hand by the actuation every thirtieth of the month for months less than thirty-one days of a satellite carried by this crown and located on a level different from that of the internal teeth of the crown by a second finger of said drive member.
  • the date mechanism described in this patent application has the drawback that its display crown comprises means, including on the one hand its internal teeth and on the other hand its month satellite, distinct for its rotation drive, these means located on different levels. This takes up a lot of space, especially since the satellite, integral with the display crown, pivots with it.
  • the European patent application EP 1 666 991 A1 describes an annual calendar mechanism for a timepiece comprising a date-driving mobile unit making one revolution in twenty-four hours, this mobile unit being equipped with a first finger driving a step and once a day a first stage of a date crown comprising thirty-one internal teeth, said mobile being equipped with a second finger driving by one step and at the end of one month less of thirty-one days, one of the five pins with which a board is fitted with an annual wheel arranged coaxially with the date crown, said mechanism further comprising a reference connecting at the end of each month, said annual wheel to a lug disposed inside a second stage of said date crown.
  • the mechanism described in this application also has the drawback of taking up space.
  • its display ring comprises means, including on the one hand its internal teeth and on the other hand the lug that it carries via its second stage, distinct for its drive in rotation, these means being located on different levels .
  • An object of the present invention is to provide a date mechanism allowing the correct passage of the date display at the end of the month whether the month is a month of thirty days or a month of thirty-one days, said mechanism comprising a display crown of which only the internal teeth, located on a single level, allow it to rotate.
  • the invention also relates to a timepiece such as a wristwatch, a pocket watch or a table calendar comprising such a date mechanism.
  • the date mechanism according to the invention is typically fixed to a frame such as a plate or a bridge of a watch movement.
  • the frame can also be an additional board, the date mechanism and said board typically forming a module. Unless otherwise indicated, the various movements described are described in relation to said frame.
  • the month cam typically comprises hollowed out parts, all of the same depth, and non-hollowed out parts, distributed over adjacent angular sectors. This is typically a cam of twelve comprising twelve angular sectors of 30 ° alternating, in the order of the months which they represent, angular portions hollowed out and not hollowed out.
  • the month cam rotates each month, typically by a twelfth of a turn, to present a part that is scooped out with the probe during months of less than thirty-one days and to present a part that is not dug with the probe during months of thirty-one and-one days.
  • the feeler of the rocker is typically held in abutment against the months cam by means of a spring called a “rocker spring”, this spring being typically fixed to the frame.
  • rocker spring a spring that is typically fixed to the frame.
  • rest position the position of the rocker in which its feeler is resting against the month cam.
  • internally toothed ring gear designates an internally toothed ring. It is typically a hollow disc comprising teeth uniformly distributed over its interior contour.
  • a date mechanism 1 comprises a date display crown 2, a cam of twelve 3, a lever 4 comprising a feeler 4a and carrying a pawl 4b, and a wheel 5 of twenty-four hours wearing a finger 6.
  • the pawl 4b carried by the latch 4 is able to pivot about an axis of rotation A3 (virtual or imaginary), fixed with respect to the latch 4.
  • the date mechanism 1 is integrated into a watch movement comprising a plate 100.
  • the date display crown 2 comprises indications 7 ranging from one to thirty-one and corresponding to the dates of the months, uniformly distributed over a circumference of its upper surface and intended to be read through an aperture 8 of which the position is fixed relative to the plate 100.
  • the window 8 is typically produced in a dial positioned above the display crown 2. In the figures, although such a dial is not shown for reasons of legibility, the position of the window 8 is materialized.
  • the rocker 4 is intended to pivot around an axis of rotation O (virtual or imaginary) between a rest position, in which its feeler 4a is held in abutment against the cam of twelve 3, typically by a rocker spring 9 fixed on the plate 100, and a predetermined position called “extreme position” corresponding to the position of the rocker 4 in which the feeler 4a is the furthest from the cam of twelve 3.
  • O axis of rotation
  • the pawl 4b which it carries actuates the display crown 2, the positioning of which is ensured by a positioning device 10 comprising a jumper 10a.
  • the end 4b ′ of the pawl 4b cooperating with the teeth of the display crown 2 is kept pivoted in the counterclockwise direction by a pawl spring 11, fixed on the rocker 4.
  • the cam of twelve 3 has hollow parts and solid parts (or not hollow), each of them corresponding to a month of the common year.
  • the hollow parts of the cam of twelve 3 are all located at the same distance from its axis of rotation A2 (virtual or imaginary) and therefore all have the same depth.
  • the solid parts are also all located at the same distance from the axis of rotation A2.
  • the cam of twelve 3 rotates at the end of each month by a twelfth of a turn.
  • the feeler 4a is located at a given position which determines the rest position of the rocker 4. This position determines the amplitude of the pawl 4b of the rocker 4 acting on the internal teeth of the rocker. the display crown 2.
  • the twelve cam 3 is coaxial and rotatably secured to a twelve star 16 comprising twelve teeth.
  • This star 16 rotates around the axis A2 of a not per month. It is typically positioned by a jumper 17 of which only a part is visible in the figures.
  • the finger 6 is coaxial with the twenty-four hour wheel 5 and pivots around the axis of rotation A1 of this wheel 5 at a speed of one revolution per twenty-four hours in the counterclockwise direction.
  • the twenty-four hour wheel 5 performs one revolution per day. For this, it typically meshes with the hours wheel 18 of the timing gear of the watch movement in which the date mechanism 1 is integrated.
  • a pin 15 fixed on the twenty-four hour wheel 5 allows the finger 6 to be driven in rotation at a speed of one revolution per twenty-four hours in the counterclockwise direction. It is the normal direction of rotation of the hour wheel 18 (here clockwise) which defines the direction of rotation of the wheel 5 and therefore of the finger 6.
  • the pin 15 could be replaced by an element, such as 'a lug, retractable.
  • said element would only allow the finger 6 to be driven when the twenty-four hour wheel 5 rotates counterclockwise. This would make it possible to protect the mechanism, for example when setting the time which would consist of backing the time.
  • tooth X / Y the tooth of display crown 2 located between indications 7 with the numbers X and Y.
  • this first special tooth 15/16 comprising a first 13a and a second 13b small teeth which correspond to a tooth classic split in two. Together, these teeth 13a, 13b occupy a width "l", identical to the width of a conventional tooth.
  • These small teeth 13a, 13b play a particular role for the passage of dates at the end of the month depending on whether or not the current month is a month of thirty-one days, as explained below.
  • the figures 2a to 2d illustrate the mechanism 1 in successive states, during the passage from the twenty-eight date to the twenty-nine date of the month of March.
  • the figure 2a illustrates mechanism 1, on March 28 at the end of the day.
  • the rocker 4 at rest, its feeler 4a being held in support by the rocker spring 9 against a non-hollowed part of the cam of twelve 3.
  • the pawl 4b is in turn resting on a tooth 13/14 of the internal teeth of the date display crown 2.
  • the end 4b 'of the pawl 4b abuts against the tooth 12/13 of the date display crown 2 in order to lift it. Initially, the pawl 4b pivots counterclockwise until this pivoting is blocked by a stop 12 fixed on the rocker 4.
  • the torque necessary to drive the rotation of the display crown 2 is typically defined by the positioning device 10.
  • the positioning device 10 of the display crown 2 is rotated under the effect of this rotation. Even if the extreme position of the rocker 4 is not sufficient for the pawl 4b to cause the display crown 2 to rotate one full step, the positioning device 10 allows the repositioning of the display crown to be repositioned. date 2. It helps the latter to complete the rotation of a step that it has started, as illustrated in figure 2c .
  • the figure 3 illustrates mechanism 1 on April 1 at the start of the day.
  • the rocker 4 at rest, its feeler 4a being held in support by the rocker spring 9 against a recessed part of the cam of twelve 3.
  • the pawl 4b bears against a tooth of the internal toothing of the date display crown 2, typically in the middle of the width of this tooth, as illustrated in figure 3 and not against the side of that tooth.
  • the steps are identical for each standard jump of a month of less than thirty-one days, that is to say for each passage of a date of a month of less than thirty-one days except for the passage from the thirtieth day of that month to the first day of the following month.
  • mechanism 1 when changing from date thirty to date thirty-one of a month and then from date thirty-one of that month to the first date of the following month during months of thirty-one days is described in more detail below with reference to figures 4a to 4g .
  • the figure 4a illustrates mechanism 1 on March 30, at the end of the day.
  • the feeler 4a of the rocker 4 is resting against a solid part of the cam twelve 3 indicating that it is a thirty-one day month.
  • the pawl 4b is held, by the spring 11, resting against the first 13a of the two small teeth 13a, 13b facing it.
  • the rocker 4 is actuated by the finger 6 of the twenty-four hour wheel 5, it pivots and its pawl 4b drives the display crown 2 in clockwise rotation by acting on the tooth 14/15 of date crown 2. This is illustrated in figures 4b and 4c .
  • the stopper 12 prevents the pawl 4b from retracting by pivoting counterclockwise when lifting the lever 4 ( figure 4b ).
  • the figure 4d illustrates mechanism 1 several hours later, on March 31, at the end of the day.
  • the position of the cam of twelve 3 has not changed.
  • the rocker 4 is in the rest position, with its feeler 4a resting against an uncut part of the cam of twelve 3.
  • the finger 6 again raises the rocker 4 and its pawl 4b comes drive display crown 2 in clockwise rotation by acting this time on the small lower tooth 13b of the date crown 2 between the indications fifteen and sixteen. This is illustrated in figures 4e and 4f .
  • the figure 5a illustrates mechanism 1 on April 30 at the end of the day.
  • the feeler 4a of the rocker 4 rests against a hollowed out part of the twelve cam 3 indicating that it is a month less than thirty-one days.
  • the end 4b 'of the pawl 4b is held, by the pawl spring 11, resting against the second 13b of the two small teeth facing it, that is to say between the two small teeth 13a, 13b.
  • the rocker 4 is actuated by the finger 6 of the twenty-four hour wheel 5, it pivots and its pawl 4b drives the display crown 2 in clockwise rotation by acting on the first small tooth 13a of date crown 2. This is illustrated on figure 5b .
  • the stop 12 prevents the end 4b 'of the pawl 4b from retracting during the lifting of the lever 4. It keeps the end 4b' of the pawl 4b in the path of the first small tooth 13a and therefore participates in the 'drive the display crown 2 in rotation.
  • the second special tooth 14 of the display crown 2 caused the star to rotate by one step. of twelve 16 and therefore the positioning of the cam of twelve 3 in a position corresponding to the following month, the month of May, which is a month of thirty-one days.
  • the rotation of the star of twelve 16 is illustrated in particular in figures 5d and 5th .
  • the date mechanism 1 allows the correct passage of the date display at the end of the month whether the month is a month of thirty days or a month of thirty-one days.
  • the thirty-day months, on the night of the thirtieth to the first, the thirtieth of the month is followed by the first without manual intervention.
  • the date mechanism 1 has the advantage of comprising a display crown of which only the internal teeth, located on a single level, allow it to be set in rotation. It therefore takes up less space than date mechanisms of this type according to the prior art. In addition, it also has the advantage of requiring only a single pawl for actuating the date display crown 2.
  • the month cam 3 comprises twelve angular portions with hollow and non-hollow parts corresponding respectively to months of less than thirty-one days and to months of thirty-one days and is associated with a star of twelve 16 with twelve teeth. It is clear that the cam of the months could take different forms as long as its function is not impaired. It could in particular comprise a number of angular portions which is a multiple of twelve and be associated with a star comprising a number of teeth corresponding to this number of angular portions. The mechanism could also be adjusted so that the valleys correspond to months of thirty-one days and the flat parts to months of less than thirty-one days.
  • the date mechanism 1 illustrated in figures 1 to 5f is an annual calendar mechanism and behaves in February as if it had thirty days.
  • the mechanism could be modified so that it behaves in February as if it had thirty-one days.
  • a person skilled in the art could easily adapt it, in particular by adding a leap year cam, to make it a perpetual calendar.
  • the date mechanism according to the invention is typically fixed to a frame such as a plate or a bridge of a watch movement.
  • the date mechanism according to the invention can also have its own frame, typically an additional plate, which can be made integral with the frame of said watch movement.
  • date mechanism 1 can be adapted so that the so-called “special” teeth are positioned elsewhere on the watch. internal toothing of the date display crown 2. In addition, their shape can also be changed as long as their function is retained.
  • the two teeth 13a, 13b of the first special tooth 13 of width "l” could not have the same width so that the recess separating them would not be located in the middle of the width "l” of the first special tooth. 13 but at a distance corresponding to x% of "l” with respect to one end of this tooth 13, the position of this end being considered with respect to a predetermined direction of rotation.
  • the mechanism 1 would then be adapted so that, during the days one to twenty-nine of the months of less than thirty-one days, the end 4b 'of the pawl 4b is positioned resting against a tooth of the internal teeth of the display crown 2, at the same distance of x% of “l” from the end of this tooth considered with respect to the same predetermined direction of rotation.
  • the positioning device 10 illustrated in figures 1 to 5f is a device comprising a jumper 10a associated with a mobile, said mobile comprising a star with five teeth 10b and a wheel with wide teeth 10c.
  • the width of the teeth of said wide-toothed wheel 10c typically corresponds to the distance separating two teeth of the internal teeth of the date crown 2.
  • the five-tooth star is positioned by a “conventional” jumper 10a fixed on the plate 100. and the wide toothed wheel 10c cooperates with the teeth of the display crown 2.
  • Such a positioning device 10 could be replaced by a conventional jumper (such as the jumper 10a).
  • the pawl 4b could have come integrally with the rocker 4 while remaining movable in rotation with respect to this rocker 4.
  • the twenty-four hour wheel 5 could be driven in rotation other than via the hours wheel 18 of the timer train of the watch movement in which the mechanism 1 is integrated.
  • the positioning device 10 participates in the rotation of the display crown 2, the rocker not needing to cause by itself the displacement of a complete step of the crown d. 'display 2. This is intended to limit the energy consumption necessary to raise the latch 4. However, it is very well conceivable to design the date mechanism according to the invention so that the latch 4 can, on its own , using its pawl 4b, cause the display ring 2 to rotate one full step.

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

Description

La présente invention concerne un mécanisme de quantième pour pièce d'horlogerie comprenant une couronne d'affichage portant des indications de quantième destinées à être désignées successivement pour être lues, typiquement au travers d'un guichet ou à l'aide d'un pointeur.The present invention relates to a date mechanism for a timepiece comprising a display crown bearing date indications intended to be designated successively in order to be read, typically through a window or using a pointer.

La demande de brevet EP 1 596 261 A1 décrit un mécanisme de quantième annuel pour pièce d'horlogerie comprenant une couronne d'affichage de quantième à denture intérieure portant des indications destinées à être lues au travers d'un guichet. L'entraînement de cette couronne d'affichage en rotation sous le guichet est réalisé d'une part, par l'actionnement quotidien de sa denture intérieure par un premier doigt d'un organe d'entraînement et d'autre part par l'actionnement chaque trente du mois des mois de moins de trente-et-un jours d'un satellite porté par cette couronne et situé sur un niveau différent de celui de la denture intérieure de la couronne par un second doigt dudit organe d'entraînement. Le mécanisme de quantième décrit dans cette demande de brevet présente l'inconvénient que sa couronne d'affichage comprend des moyens, incluant d'une part sa denture intérieure et d'autre part son satellite des mois, distincts pour son entraînement en rotation, ces moyens se situant sur des niveaux différents. Cela prend beaucoup d'espace, d'autant plus que le satellite, solidaire de la couronne d'affichage, pivote avec elle.The patent application EP 1 596 261 A1 describes an annual calendar mechanism for a timepiece comprising an internally toothed date display crown bearing indications intended to be read through a window. The drive of this display ring in rotation under the window is achieved on the one hand, by daily actuation of its internal teeth by a first finger of a drive member and on the other hand by the actuation every thirtieth of the month for months less than thirty-one days of a satellite carried by this crown and located on a level different from that of the internal teeth of the crown by a second finger of said drive member. The date mechanism described in this patent application has the drawback that its display crown comprises means, including on the one hand its internal teeth and on the other hand its month satellite, distinct for its rotation drive, these means located on different levels. This takes up a lot of space, especially since the satellite, integral with the display crown, pivots with it.

La demande de brevet européen EP 1 666 991 A1 décrit un mécanisme de quantième annuel pour pièce d'horlogerie comportant un mobile entraîneur de quantième faisant un tour en vingt-quatre heures, ce mobile étant équipé d'un premier doigt entraînant d'un pas et une fois par jour un premier étage d'une couronne de quantième comportant trente et une dents intérieures, ledit mobile étant équipé d'un second doigt entraînant d'un pas et à la fin d'un mois de moins de trente et un jours l'un des cinq ergots dont est munie une planche solidaire d'une roue annuelle disposée coaxialement à la couronne de quantième, ledit mécanisme comportant en outre un renvoi reliant à la fin de chaque mois, ladite roue annuelle à un ergot disposé à l'intérieur d'un second étage de ladite couronne de quantième. Le mécanisme décrit dans cette demande présente également l'inconvénient de prendre de l'espace. En effet, comme pour le mécanisme décrit dans la demande EP 1 596 261 A1 , sa couronne d'affichage comprend des moyens, incluant d'une part sa denture intérieure et d'autre part l'ergot qu'elle porte via son second étage, distincts pour son entraînement en rotation, ces moyens se situant sur des niveaux différents.The European patent application EP 1 666 991 A1 describes an annual calendar mechanism for a timepiece comprising a date-driving mobile unit making one revolution in twenty-four hours, this mobile unit being equipped with a first finger driving a step and once a day a first stage of a date crown comprising thirty-one internal teeth, said mobile being equipped with a second finger driving by one step and at the end of one month less of thirty-one days, one of the five pins with which a board is fitted with an annual wheel arranged coaxially with the date crown, said mechanism further comprising a reference connecting at the end of each month, said annual wheel to a lug disposed inside a second stage of said date crown. The mechanism described in this application also has the drawback of taking up space. Indeed, as for the mechanism described in the request EP 1 596 261 A1 , its display ring comprises means, including on the one hand its internal teeth and on the other hand the lug that it carries via its second stage, distinct for its drive in rotation, these means being located on different levels .

Un but de la présente invention est de proposer un mécanisme de quantième permettant le passage correct de l'affichage de quantième en fin de mois que le mois soit un mois de trente jours ou un mois de trente-et-un jours, ledit mécanisme comprenant une couronne d'affichage dont seule la denture intérieure, située sur un seul niveau, permet sa mise en rotation.An object of the present invention is to provide a date mechanism allowing the correct passage of the date display at the end of the month whether the month is a month of thirty days or a month of thirty-one days, said mechanism comprising a display crown of which only the internal teeth, located on a single level, allow it to rotate.

L'invention propose à cette fin un mécanisme de quantième comprenant une couronne d'affichage à denture intérieure portant des indications allant de un à trente-et-un destinées à être désignées successivement pour indiquer le quantième du mois, une dent de la denture intérieure de la couronne d'affichage étant remplacée par un organe d'entraînement de forme différente de celle des dents de ladite denture, une came des mois dont la position angulaire est indicative du nombre de jours dans le mois en cours et une bascule comprenant un palpeur et un cliquet, ladite bascule étant destinée à être entraînée en rotation, depuis une position dans laquelle son palpeur est en appui contre ladite came des mois, cette position dépendant du nombre de jours dans le mois, vers une position prédéterminée, le tout étant agencé de sorte que :

  • quel que soit le nombre de jours du mois en cours, lorsque le quantième du mois est compris entre un et vingt-neuf inclus, à chaque rotation de la bascule depuis la position dans laquelle son palpeur est en appui contre la came des mois vers ladite position prédéterminée, le cliquet coopère avec une dent de la denture intérieure de la couronne d'affichage, pour entraîner la rotation d'un pas de ladite couronne d'affichage, l'indication de quantième désignée étant ainsi incrémentée d'une unité ;
  • lorsque le quantième du mois est égal à trente :
    • ∘ si le mois en cours est un mois de trente jours, sous l'effet de la rotation de la bascule depuis la position dans laquelle son palpeur est en appui contre la came des mois, le cliquet coopère avec une première partie de l'organe d'entraînement pour entraîner la rotation d'un premier pas de ladite couronne d'affichage puis coopère avec une dent de la denture intérieure de la couronne d'affichage adjacente à l'organe d'entraînement pour entraîner d'un second pas la couronne d'affichage, l'indication de quantième désignée passant ainsi de trente à trente-et-un puis de trente-et-un à un consécutivement ; et
    • ∘ si le mois en cours est un mois de trente-et-un jours, sous l'effet de la rotation de la bascule depuis la position dans laquelle son palpeur est en appui contre la came des mois vers ladite position prédéterminée, le cliquet coopère avec une dent de la denture intérieure de la couronne d'affichage adjacente à l'organe d'entraînement pour entraîner la rotation d'un pas de ladite couronne d'affichage, l'indication de quantième désignée passant ainsi de trente à trente-et-un.
  • lorsque le quantième du mois est égal à trente-et-un, sous l'effet de la rotation de la bascule depuis la position dans laquelle son palpeur est en appui contre la came des mois vers ladite position prédéterminée, le cliquet coopère avec une seconde partie de l'organe d'entraînement pour entraîner la rotation d'un pas de ladite couronne d'affichage, l'indication de quantième désignée passant ainsi de trente-et-un à un.
To this end, the invention proposes a date mechanism comprising a display crown with internal teeth bearing indications ranging from one to thirty-one intended to be designated successively to indicate the date of the month, a tooth of the internal toothing. of the display crown being replaced by a drive member of a shape different from that of the teeth of said toothing, a months cam whose angular position is indicative of the number of days in the current month and a rocker comprising a feeler and a pawl, said rocker being intended to be driven in rotation, from a position in which its feeler bears against said month cam, this position depending on the number of days in the month, to a predetermined position, the whole being arranged so that :
  • regardless of the number of days in the current month, when the date of the month is between one and twenty-nine inclusive, on each rotation of the rocker from the position in which its feeler is resting against the month cam towards said predetermined position, the pawl cooperates with a tooth of the internal teeth of the display crown, to drive the rotation of said display crown by one step, the designated date indication thus being incremented by one unit;
  • when the date of the month is equal to thirty:
    • ∘ if the current month is a month of thirty days, under the effect of the rotation of the rocker from the position in which its feeler is resting against the months cam, the pawl cooperates with a first part of the organ drive to drive the rotation of a first step of said display ring then cooperates with a tooth of the internal toothing of the display ring adjacent to the drive member to drive the ring by a second step display, the designated date indication thus changing from thirty to thirty-one then from thirty-one to one consecutively; and
    • ∘ if the current month is a month of thirty-one days, under the effect of the rotation of the rocker from the position in which its feeler bears against the month cam towards said predetermined position, the pawl cooperates with a tooth of the internal toothing of the display crown adjacent to the drive member to drive the rotation of said display crown by one step, the designated date indication thus passing from thirty to thirty-and -a.
  • when the date of the month is equal to thirty-one, under the effect of the rotation of the rocker from the position in which its feeler bears against the months cam towards said predetermined position, the pawl cooperates with a second part of the drive member for driving the rotation of one step of said display crown, the designated date indication thus changing from thirty-one to one.

L'invention concerne également une pièce d'horlogerie telle qu'une montre bracelet, une montre de poche ou un calendrier de table comprenant un tel mécanisme de quantième.The invention also relates to a timepiece such as a wristwatch, a pocket watch or a table calendar comprising such a date mechanism.

Le mécanisme de quantième selon l'invention est typiquement fixé sur un bâti tel qu'une platine ou un pont d'un mouvement horloger. Le bâti peut également être une planche additionnelle, le mécanisme de quantième et ladite planche formant typiquement un module. Sauf indication contraire, les différents mouvements décrits sont décrits relativement audit bâti.The date mechanism according to the invention is typically fixed to a frame such as a plate or a bridge of a watch movement. The frame can also be an additional board, the date mechanism and said board typically forming a module. Unless otherwise indicated, the various movements described are described in relation to said frame.

La came des mois comprend typiquement des parties creusées, toutes de même profondeur, et des parties non creusées, réparties sur des secteurs angulaires adjacents. Il s'agit typiquement d'une came de douze comprenant douze secteurs angulaires de 30° alternant, en suivant l'ordre des mois qu'elles représentent, des portions angulaires creusées et non creusées. La came des mois pivote chaque mois, typiquement d'un douzième de tour, pour présenter une partie creusée au palpeur lors des mois de moins de trente-et-un jours et pour présenter une partie non creusée au palpeur lors des mois de trente-et-un jours.The month cam typically comprises hollowed out parts, all of the same depth, and non-hollowed out parts, distributed over adjacent angular sectors. This is typically a cam of twelve comprising twelve angular sectors of 30 ° alternating, in the order of the months which they represent, angular portions hollowed out and not hollowed out. The month cam rotates each month, typically by a twelfth of a turn, to present a part that is scooped out with the probe during months of less than thirty-one days and to present a part that is not dug with the probe during months of thirty-one and-one days.

Le palpeur de la bascule est typiquement maintenu en appui contre la came des mois par le biais d'un ressort dit « ressort de bascule », ce ressort étant typiquement fixé sur le bâti. Selon que le mois en cours comprenne trente-et-un jours ou moins, la position de la bascule dans laquelle son palpeur est en appui contre la came des mois, appelée « position de repos », varie. Il existe typiquement deux positions de repos distinctes de la bascule, selon que le mois en cours comprenne trente-et-un jours ou moins de trente-et-un jours, ces positions dépendant de la position angulaire de la came des mois par rapport au bâti.The feeler of the rocker is typically held in abutment against the months cam by means of a spring called a “rocker spring”, this spring being typically fixed to the frame. Depending on whether the current month includes thirty-one days or less, the position of the rocker in which its feeler is resting against the month cam, called “rest position”, varies. There are typically two distinct rest positions of the rocker, depending on whether the current month comprises thirty-one days or less than thirty-one days, these positions depending on the angular position of the month cam with respect to the month. built.

L'expression « couronne à denture intérieure » désigne un anneau à denture intérieure. Il s'agit typiquement d'un disque creux comportant des dents uniformément réparties sur son contour intérieur.The expression “internally toothed ring gear” designates an internally toothed ring. It is typically a hollow disc comprising teeth uniformly distributed over its interior contour.

D'autres caractéristiques et avantages de la présente invention apparaîtront à la lecture de la description détaillée suivante faite en référence aux dessins annexés dans lesquels :

  • La figure 1 illustre, en perspective, un mécanisme de quantième selon un mode de réalisation particulier de l'invention ;
  • Les figures 2a à 2d illustrent, en vue de dessus et par transparence, le mécanisme représenté à la figure 1 dans des états successifs lors du passage du quantième vingt-huit au quantième vingt-neuf du mois de mars ;
  • La figure 3 illustre, en vue de dessus et par transparence, le mécanisme représenté à la figure 1 le premier avril en début de journée ;
  • Les figures 4a à 4g représentent, en vue de dessus et par transparence, le mécanisme représenté à la figure 1 dans des états successifs, lors du passage du quantième trente au quantième trente-et-un du mois de mars puis du quantième trente-et-un de ce mois au premier quantième du mois d'avril ;
  • Les figures 5a à 5f représentent, en vue de dessus et par transparence, le mécanisme représenté à la figure 1 dans des états successifs, lors du passage du quantième trente du mois d'avril au premier quantième du mois de mai.
Other characteristics and advantages of the present invention will become apparent on reading the following detailed description given with reference to the appended drawings in which:
  • The figure 1 illustrates, in perspective, a date mechanism according to a particular embodiment of the invention;
  • The figures 2a to 2d illustrate, in top view and by transparency, the mechanism shown in figure 1 in successive states during the passage from the twenty-eight date to the twenty-nine date of the month of March;
  • The figure 3 illustrates, in top view and by transparency, the mechanism shown in figure 1 the first of April at the start of the day;
  • The figures 4a to 4g represent, in top view and by transparency, the mechanism shown in figure 1 in successive states, during the passage from the date thirty to the date thirty-one of the month of March then from the date of the date thirty-one of that month to the first date of the month of April;
  • The figures 5a to 5f represent, in top view and by transparency, the mechanism shown in figure 1 in successive states, during the passage from the 30th day of the month of April to the first date of the month of May.

En référence aux figures 1 à 5f, un mécanisme de quantième 1 selon un mode de réalisation particulier de l'invention comprend une couronne d'affichage de quantième 2, une came de douze 3, une bascule 4 comprenant un palpeur 4a et portant un cliquet 4b, et une roue 5 de vingt-quatre heures portant un doigt 6.With reference to figures 1 to 5f , a date mechanism 1 according to a particular embodiment of the invention comprises a date display crown 2, a cam of twelve 3, a lever 4 comprising a feeler 4a and carrying a pawl 4b, and a wheel 5 of twenty-four hours wearing a finger 6.

Le cliquet 4b porté par la bascule 4 est apte à pivoter autour d'un axe de rotation A3 (virtuel ou imaginaire), fixe par rapport à la bascule 4.The pawl 4b carried by the latch 4 is able to pivot about an axis of rotation A3 (virtual or imaginary), fixed with respect to the latch 4.

Le mécanisme de quantième 1 est intégré dans un mouvement horloger comprenant une platine 100.The date mechanism 1 is integrated into a watch movement comprising a plate 100.

La couronne d'affichage de quantième 2 comporte des indications 7 allant de un à trente-et-un et correspondant aux quantièmes des mois, uniformément réparties sur une circonférence de sa surface supérieure et destinées à être lues au travers d'un guichet 8 dont la position est fixe par rapport à la platine 100. Le guichet 8 est typiquement réalisé dans un cadran positionné au-dessus de la couronne d'affichage 2. Dans les figures, bien qu'un tel cadran ne soit pas représenté pour des raisons de lisibilité, la position du guichet 8 est quant à elle matérialisée.The date display crown 2 comprises indications 7 ranging from one to thirty-one and corresponding to the dates of the months, uniformly distributed over a circumference of its upper surface and intended to be read through an aperture 8 of which the position is fixed relative to the plate 100. The window 8 is typically produced in a dial positioned above the display crown 2. In the figures, although such a dial is not shown for reasons of legibility, the position of the window 8 is materialized.

La bascule 4 est destinée à pivoter autour d'un axe de rotation O (virtuel ou imaginaire) entre une position de repos, dans laquelle son palpeur 4a est maintenu en appui contre la came de douze 3, typiquement par un ressort de bascule 9 fixé sur la platine 100, et une position prédéterminée dite « position extrême » correspondant à la position de la bascule 4 dans laquelle le palpeur 4a est le plus éloigné de la came de douze 3.The rocker 4 is intended to pivot around an axis of rotation O (virtual or imaginary) between a rest position, in which its feeler 4a is held in abutment against the cam of twelve 3, typically by a rocker spring 9 fixed on the plate 100, and a predetermined position called "extreme position" corresponding to the position of the rocker 4 in which the feeler 4a is the furthest from the cam of twelve 3.

Le passage de la position de repos à la position extrême s'effectue, chaque vingt-quatre heures, sous l'effet du doigt 6 pivotant autour d'un axe de rotation A1 (virtuel ou imaginaire) à une vitesse d'un tour par vingt-quatre heures dans le sens antihoraire, ce doigt 6 venant pousser la bascule 4 en agissant sur une de ses extrémités 4c.The passage from the rest position to the extreme position is carried out, every twenty-four hours, under the effect of the finger 6 pivoting around a rotation axis A1 (virtual or imaginary) at a speed of one revolution per twenty-four hours in a counterclockwise direction, this finger 6 pushing the lever 4 by acting on one of its ends 4c.

Lors du pivotement de la bascule 4, le cliquet 4b qu'elle porte actionne la couronne d'affichage 2 dont le positionnement est assuré par un dispositif de positionnement 10 comprenant un sautoir 10a. L'extrémité 4b' du cliquet 4b coopérant avec la denture de la couronne d'affichage 2 est maintenue pivotée dans le sens antihoraire par un ressort de cliquet 11, fixé sur la bascule 4.During the pivoting of the rocker 4, the pawl 4b which it carries actuates the display crown 2, the positioning of which is ensured by a positioning device 10 comprising a jumper 10a. The end 4b ′ of the pawl 4b cooperating with the teeth of the display crown 2 is kept pivoted in the counterclockwise direction by a pawl spring 11, fixed on the rocker 4.

La came de douze 3 possède des parties creuses et des parties pleines (ou non creuses), chacune d'elles correspondant à un mois de l'année commune. Les parties creuses de la came de douze 3 sont toutes situées à la même distance de son axe de rotation A2 (virtuel ou imaginaire) et ont donc toutes la même profondeur. De même, les parties pleines sont également toutes situées à la même distance de l'axe de rotation A2. La came de douze 3 pivote à chaque fin de mois d'un douzième de tour.The cam of twelve 3 has hollow parts and solid parts (or not hollow), each of them corresponding to a month of the common year. The hollow parts of the cam of twelve 3 are all located at the same distance from its axis of rotation A2 (virtual or imaginary) and therefore all have the same depth. Likewise, the solid parts are also all located at the same distance from the axis of rotation A2. The cam of twelve 3 rotates at the end of each month by a twelfth of a turn.

Selon la position angulaire de la came de douze 3, le palpeur 4a se situe à une position donnée qui détermine la position de repos de la bascule 4. Cette position détermine l'amplitude du cliquet 4b de la bascule 4 agissant sur la denture intérieure de la couronne d'affichage 2. Il existe typiquement deux positions de repos distinctes de la bascule 4, selon que le mois en cours comprenne trente-et-un jours ou moins de trente-et-un jours. Par exemple, une première de ces positions est représentée à la figure 2a et une seconde de ces positions est représentée à la figure 3.According to the angular position of the cam of twelve 3, the feeler 4a is located at a given position which determines the rest position of the rocker 4. This position determines the amplitude of the pawl 4b of the rocker 4 acting on the internal teeth of the rocker. the display crown 2. There are typically two distinct rest positions of the rocker 4, depending on whether the current month comprises thirty-one days or less than thirty-one days. For example, a first of these positions is shown at figure 2a and a second of these positions is shown at figure 3 .

La came de douze 3 est coaxiale et solidaire en rotation d'une étoile de douze 16 comprenant douze dents. Cette étoile 16 pivote autour de l'axe A2 d'un pas par mois. Elle est typiquement positionnée par un sautoir 17 dont seule une partie est visible sur les figures.The twelve cam 3 is coaxial and rotatably secured to a twelve star 16 comprising twelve teeth. This star 16 rotates around the axis A2 of a not per month. It is typically positioned by a jumper 17 of which only a part is visible in the figures.

Le doigt 6 est coaxial de la roue 5 de vingt-quatre heures et pivote autour de l'axe de rotation A1 de cette roue 5 à une vitesse d'un tour par vingt-quatre heures dans le sens antihoraire. Comme son nom l'indique, la roue 5 de vingt-quatre heures effectue un tour par jour. Pour cela, elle engrène typiquement avec la roue des heures 18 du rouage de minuterie du mouvement horloger dans lequel le mécanisme de quantième 1 est intégré. Une goupille 15 fixée sur la roue 5 de vingt-quatre heures permet l'entraînement du doigt 6 en rotation à une vitesse d'un tour par vingt-quatre heures dans le sens antihoraire. C'est le sens de rotation normal de la roue des heures 18 (ici sens horaire) qui définit le sens de rotation de la roue 5 et donc du doigt 6. En variante, la goupille 15 pourrait être remplacée par un élément, tel qu'un ergot, escamotable. Dans ce cas, ledit élément ne permettrait l'entraînement du doigt 6 que lorsque la roue 5 de vingt-quatre heures pivoterait dans le sens antihoraire. Cela permettrait de protéger le mécanisme, par exemple lors d'un réglage de l'heure qui consisterait à reculer l'heure.The finger 6 is coaxial with the twenty-four hour wheel 5 and pivots around the axis of rotation A1 of this wheel 5 at a speed of one revolution per twenty-four hours in the counterclockwise direction. As the name suggests, the twenty-four hour wheel 5 performs one revolution per day. For this, it typically meshes with the hours wheel 18 of the timing gear of the watch movement in which the date mechanism 1 is integrated. A pin 15 fixed on the twenty-four hour wheel 5 allows the finger 6 to be driven in rotation at a speed of one revolution per twenty-four hours in the counterclockwise direction. It is the normal direction of rotation of the hour wheel 18 (here clockwise) which defines the direction of rotation of the wheel 5 and therefore of the finger 6. As a variant, the pin 15 could be replaced by an element, such as 'a lug, retractable. In this case, said element would only allow the finger 6 to be driven when the twenty-four hour wheel 5 rotates counterclockwise. This would make it possible to protect the mechanism, for example when setting the time which would consist of backing the time.

Dans la suite de la description, pour faciliter la compréhension de l'invention, nous appellerons, en référence aux figures 1 à 5f, dent X/Y la dent de la couronne d'affichage 2 située entre les indications 7 portant les numéros X et Y.In the remainder of the description, to facilitate understanding of the invention, we will call, with reference to figures 1 to 5f , tooth X / Y the tooth of display crown 2 located between indications 7 with the numbers X and Y.

Entre les indications quinze et seize de la couronne d'affichage 2 se trouve une première dent (15/16) spéciale en deux parties, cette première dent spéciale 15/16 comprenant une première 13a et une seconde 13b petites dents qui correspondent à une dent classique séparée en deux. A elles deux, ces dents 13a, 13b occupent une largeur « l », identique à la largeur d'une dent classique. Ces petites dents 13a, 13b jouent un rôle particulier pour le passage des quantièmes en fin de mois selon que le mois en cours soit ou non un mois de trente-et-un jours, comme expliqué plus loin.Between the fifteen and sixteen indications of the display crown 2 is a first special tooth (15/16) in two parts, this first special tooth 15/16 comprising a first 13a and a second 13b small teeth which correspond to a tooth classic split in two. Together, these teeth 13a, 13b occupy a width "l", identical to the width of a conventional tooth. These small teeth 13a, 13b play a particular role for the passage of dates at the end of the month depending on whether or not the current month is a month of thirty-one days, as explained below.

Entre les indications vingt et vingt-et-un se trouve une seconde dent spéciale 20/21, différente de la première et plus longue que les autres de manière à permettre l'entraînement de l'étoile 16 de douze d'un pas chaque mois.Between the indications twenty and twenty-one is a second special tooth 20/21, different from the first and longer than the others so as to allow the training of the star 16 of twelve by one step each month .

A l'exception de ces dents « spéciales » 13a, 13b et 14, toutes les autres dents de la couronne d'affichage 2 ou « dents classiques » sont identiques ou sensiblement identiques entre elles. Elles ont une largeur « l ».With the exception of these “special” teeth 13a, 13b and 14, all the other teeth of the display ring 2 or “conventional teeth” are identical or substantially identical to each other. They have a width "l".

Les mois de trente-et-un jours, lorsque la bascule 4 est au repos, son palpeur 4a est en appui contre une partie non creusée de la came de douze 3.During the thirty-one day months, when the lever 4 is at rest, its feeler 4a is resting against an uncut part of the cam of twelve 3.

Les figures 2a à 2d illustrent le mécanisme 1 dans des états successifs, lors du passage du quantième vingt-huit au quantième vingt-neuf du mois de mars.The figures 2a to 2d illustrate the mechanism 1 in successive states, during the passage from the twenty-eight date to the twenty-nine date of the month of March.

La figure 2a illustre le mécanisme 1, le vingt-huit mars en fin de journée. On y voit la bascule 4 au repos, son palpeur 4a étant maintenu en appui par le ressort de bascule 9 contre une partie non creusée de la came de douze 3. Le cliquet 4b est quant à lui en appui sur une dent 13/14 de la denture intérieure de la couronne d'affichage de quantième 2.The figure 2a illustrates mechanism 1, on March 28 at the end of the day. We see the rocker 4 at rest, its feeler 4a being held in support by the rocker spring 9 against a non-hollowed part of the cam of twelve 3. The pawl 4b is in turn resting on a tooth 13/14 of the internal teeth of the date display crown 2.

Sous l'effet du ressort de cliquet 11, l'extrémité 4b' du cliquet 4b est maintenue en appui contre la dent 13/14, comme illustré à la figure 2a.Under the effect of the pawl spring 11, the end 4b 'of the pawl 4b is held in abutment against the tooth 13/14, as illustrated in figure 2a .

Lorsque la bascule 4 est entraînée en rotation par le doigt 6, l'extrémité 4b' du cliquet 4b vient en butée contre la dent 12/13 de la couronne d'affichage de quantième 2 pour la lever. Dans un premier temps, le cliquet 4b pivote dans le sens antihoraire jusqu'à ce que ce pivotement soit bloqué par une butée 12 fixée sur la bascule 4. Le couple nécessaire pour entraîner la rotation de la couronne d'affichage 2 est typiquement défini par le dispositif de positionnement 10.When the rocker 4 is rotated by the finger 6, the end 4b 'of the pawl 4b abuts against the tooth 12/13 of the date display crown 2 in order to lift it. Initially, the pawl 4b pivots counterclockwise until this pivoting is blocked by a stop 12 fixed on the rocker 4. The torque necessary to drive the rotation of the display crown 2 is typically defined by the positioning device 10.

Comme la bascule 4 continue de pivoter, le cliquet 4b qui ne peut pas pivoter davantage dans le sens antihoraire pousse la dent 12/13 se trouvant immédiatement à côté de lui, ce qui entraîne la rotation de la couronne d'affichage de quantième 2 dans le sens horaire, comme illustré à la figure 2b. En permettant de maintenir l'extrémité 4b' du cliquet 4b dans la trajectoire de la dent 12/13, la butée 12 participe à l'entraînement de la couronne d'affichage 2 en rotation.As the rocker 4 continues to rotate, the pawl 4b which cannot rotate further counterclockwise pushes the tooth 12/13 on it. immediately next to it, which causes the date display crown 2 to rotate clockwise, as shown in figure 2b . By making it possible to maintain the end 4b 'of the pawl 4b in the path of the tooth 12/13, the stop 12 participates in driving the display ring 2 in rotation.

Le dispositif de positionnement 10 de la couronne d'affichage 2 est pivoté sous l'effet de cette rotation. Même si la position extrême de la bascule 4 n'est pas suffisante pour que le cliquet 4b engendre la rotation d'un pas complet de la couronne d'affichage 2, le dispositif de positionnement 10 permet le repositionnement de la couronne d'affichage de quantième 2. Il aide cette dernière à terminer la rotation d'un pas qu'elle a débuté, comme illustré à la figure 2c.The positioning device 10 of the display crown 2 is rotated under the effect of this rotation. Even if the extreme position of the rocker 4 is not sufficient for the pawl 4b to cause the display crown 2 to rotate one full step, the positioning device 10 allows the repositioning of the display crown to be repositioned. date 2. It helps the latter to complete the rotation of a step that it has started, as illustrated in figure 2c .

Alors que la position extrême de la bascule 4 est atteinte, le doigt 6 continue à pivoter. Aussi, la pression qu'il exerce sur l'extrémité 4c de la bascule 4 fini par disparaître, si bien que celle-ci retourne vers sa position de repos, sous l'effet du ressort 9 de bascule.While the extreme position of the rocker 4 is reached, the finger 6 continues to pivot. Also, the pressure which it exerts on the end 4c of the rocker 4 eventually disappears, so that the latter returns to its rest position, under the effect of the rocker spring 9.

Lorsque la bascule 4 pivote vers sa position de repos, le cliquet 4b s'escamote contre la force de rappel élastique de son ressort 11 pour laisser passer la dent 13/14 sans perturber la position de la couronne de quantième 2.When the lever 4 pivots towards its rest position, the pawl 4b retracts against the elastic return force of its spring 11 to allow tooth 13/14 to pass without disturbing the position of the date crown 2.

Il vient ainsi se positionner contre la dent 14/15 adjacente à la dent 13/14 qu'il vient de laisser passer, comme le montre la figure 2d.It is thus positioned against tooth 14/15 adjacent to tooth 13/14 that it has just let through, as shown in figure 2d .

Les étapes sont identiques pour chaque saut standard d'un mois de trente-et-un jours c'est-à-dire pour chaque passage de quantième d'un mois de trente-et-un jours sauf pour le passage du quantième trente au quantième trente-et-un de ce mois puis du quantième trente-et-un de ce mois au premier quantième du mois suivant. Ces étapes particulières associées aux fins de mois sont expliquées plus loin dans la description.The steps are identical for each standard jump of a month of thirty-one days, that is to say for each passage of a date of a month of thirty-one days except for the passage of the date of thirty-one days. date thirty-one of that month then from date thirty-one of that month to the first date of the following month. These particular steps associated with the end of the month are explained later in the description.

Les mois de moins de trente-et-un jours, lorsque la bascule 4 est au repos, son palpeur 4a est en appui contre une partie creusée de la came de douze 3.In months of less than thirty-one days, when the lever 4 is at rest, its feeler 4a is resting against a hollowed out part of the cam of twelve 3.

La figure 3 illustre le mécanisme 1 le premier avril en début de journée. On y voit la bascule 4 au repos, son palpeur 4a étant maintenu en appui par le ressort de bascule 9 contre une partie creusée de la came de douze 3. Dans ce cas, contrairement à la position de repos associée aux mois de trente-et-un jours, le cliquet 4b est en appui contre une dent de la denture intérieure de la couronne d'affichage de quantième 2, typiquement au milieu de la largeur de cette dent, comme illustré à la figure 3 et non contre le côté de cette dent.The figure 3 illustrates mechanism 1 on April 1 at the start of the day. We see the rocker 4 at rest, its feeler 4a being held in support by the rocker spring 9 against a recessed part of the cam of twelve 3. In this case, unlike the rest position associated with the months of thirty-e. -one day, the pawl 4b bears against a tooth of the internal toothing of the date display crown 2, typically in the middle of the width of this tooth, as illustrated in figure 3 and not against the side of that tooth.

A partir de cette position de repos, lorsque la bascule 4 sera pivotée, sous l'effet du doigt 6, le cliquet 4b commencera par glisser contre la dent 17/18 contre laquelle il est en appui sans la déplacer puis poussera la dent 16/17 suivante, ce qui entraînera la rotation de la couronne d'affichage de quantième 2 dans le sens horaire. Les étapes suivantes sont les mêmes que celles décrites lors d'un saut standard d'un mois de trente-et-un jours. Lorsque la bascule 4 reviendra vers sa position de repos, le cliquet 4b s'escamotera contre la force de rappel élastique de son ressort 11 pour laisser passer la dent 17/18. Il viendra ainsi se positionner contre la dent 18/19, typiquement au milieu de la largeur de cette dent 18/19.From this rest position, when the rocker 4 is pivoted, under the effect of the finger 6, the pawl 4b will begin by sliding against the tooth 17/18 against which it is resting without moving it and then push the tooth 16 / 17 following, which will cause the date display crown 2 to rotate clockwise. The following steps are the same as described for a standard thirty-one day month jump. When the rocker 4 returns to its rest position, the pawl 4b will retract against the elastic return force of its spring 11 to allow the tooth 17/18 to pass. It will thus be positioned against tooth 18/19, typically in the middle of the width of this tooth 18/19.

Les étapes sont identiques pour chaque saut standard d'un mois de moins de trente-et-un jours c'est-à-dire pour chaque passage de quantième d'un mois de moins de trente-et-un jours sauf pour le passage du quantième trente de ce mois au premier quantième du mois suivant. Ces étapes particulières associées aux fins de mois sont expliquées plus loin dans la description.The steps are identical for each standard jump of a month of less than thirty-one days, that is to say for each passage of a date of a month of less than thirty-one days except for the passage from the thirtieth day of that month to the first day of the following month. These particular steps associated with the end of the month are explained later in the description.

Le fonctionnement du mécanisme 1 lors du passage du quantième trente au quantième trente-et-un d'un mois puis du quantième trente-et-un de ce mois au premier quantième du mois suivant lors des mois de trente-et-un jours est décrit plus en détails ci-dessous en référence aux figures 4a à 4g.The operation of mechanism 1 when changing from date thirty to date thirty-one of a month and then from date thirty-one of that month to the first date of the following month during months of thirty-one days is described in more detail below with reference to figures 4a to 4g .

La figure 4a illustre le mécanisme 1 le trente mars, en fin de journée. Le palpeur 4a de la bascule 4 se trouve en appui contre une partie pleine de la came de douze 3 indiquant qu'il s'agit d'un mois de trente-et-un jours. Dans cette position, le cliquet 4b est maintenu, par le ressort 11, en appui contre la première 13a des deux petites dents 13a, 13b lui faisant face. Lorsque, en fin de journée, la bascule 4 est actionnée par le doigt 6 de la roue 5 de vingt-quatre heures, elle pivote et son cliquet 4b vient entraîner la couronne d'affichage 2 en rotation dans le sens horaire en agissant sur la dent 14/15 de la couronne de quantième 2. Cela est illustré aux figures 4b et 4c. La butée 12 empêche le cliquet 4b de s'escamoter en pivotant dans le sens antihoraire lors du soulèvement de la bascule 4 (figure 4b).The figure 4a illustrates mechanism 1 on March 30, at the end of the day. The feeler 4a of the rocker 4 is resting against a solid part of the cam twelve 3 indicating that it is a thirty-one day month. In this position, the pawl 4b is held, by the spring 11, resting against the first 13a of the two small teeth 13a, 13b facing it. When, at the end of the day, the rocker 4 is actuated by the finger 6 of the twenty-four hour wheel 5, it pivots and its pawl 4b drives the display crown 2 in clockwise rotation by acting on the tooth 14/15 of date crown 2. This is illustrated in figures 4b and 4c . The stopper 12 prevents the pawl 4b from retracting by pivoting counterclockwise when lifting the lever 4 ( figure 4b ).

Dans l'état représenté à la figure 4b, la bascule 4 a atteint sa position extrême. Dans cette position, l'affichage dans le guichet 8 montre que la couronne d'affichage 2 a effectué une partie de sa rotation. Comme dans ce qui a été décrit précédemment, le reste de la rotation de la couronne d'affichage 2 se produit ensuite sous l'effet du dispositif de positionnement 10 de la couronne d'affichage 2 qui aide ladite couronne 2 à terminer son pas. L'indication correspondant au quantième trente-et-un est alors entièrement visible à travers le guichet 8, comme illustré à la figure 4c.In the state shown in figure 4b , the rocker 4 has reached its extreme position. In this position, the display in window 8 shows that display crown 2 has performed part of its rotation. As in what has been described previously, the remainder of the rotation of the display crown 2 then occurs under the effect of the positioning device 10 of the display crown 2 which helps said crown 2 to complete its step. The indication corresponding to the thirty-one date is then fully visible through window 8, as illustrated in figure 4c .

Entraîné par la roue 5 de vingt-quatre heures, le doigt 6 continue sa rotation, laissant ainsi chuter la bascule 4. Lors de cette chute le cliquet 4b s'escamote et laisse passer les deux petites dents 13a, 13b. Il se retrouve donc en appui contre la dent 16/17 suivante et le palpeur 4a revient en appui contre la came de douze 3.Driven by the twenty-four hour wheel 5, the finger 6 continues its rotation, thus letting the lever 4 fall. During this fall, the pawl 4b retracts and lets the two small teeth 13a, 13b pass. It is therefore found resting against the following tooth 16/17 and the probe 4a comes back to rest against the cam of twelve 3.

La figure 4d illustre le mécanisme 1 plusieurs heures plus tard, le trente-et-un mars, en fin de journée. La position de la came de douze 3 n'a pas changé. La bascule 4 est en position de repos, avec son palpeur 4a en appui contre une partie non creusée de la came de douze 3. Comme chaque jour en fin de journée, le doigt 6 vient à nouveau lever la bascule 4 et son cliquet 4b vient entraîner la couronne d'affichage 2 en rotation dans le sens horaire en agissant cette fois sur la petite dent inférieure 13b de la couronne de quantième 2 comprise entre les indications quinze et seize. Cela est illustré aux figures 4e et 4f.The figure 4d illustrates mechanism 1 several hours later, on March 31, at the end of the day. The position of the cam of twelve 3 has not changed. The rocker 4 is in the rest position, with its feeler 4a resting against an uncut part of the cam of twelve 3. As every day at the end of the day, the finger 6 again raises the rocker 4 and its pawl 4b comes drive display crown 2 in clockwise rotation by acting this time on the small lower tooth 13b of the date crown 2 between the indications fifteen and sixteen. This is illustrated in figures 4e and 4f .

Dans l'état représenté à la figure 4e, la bascule 4 a atteint sa position extrême. Dans cette positon, l'affichage dans le guichet 8 montre que la couronne d'affichage 2 a effectué une partie de sa rotation. Le reste de la rotation de la couronne d'affichage se produit ensuite sous l'effet du dispositif de positionnement 10 de la couronne d'affichage 2, comme déjà expliqué. L'indication correspondant au quantième « un » est alors entièrement visible à travers le guichet 8, comme illustré à la figure 4f.In the state shown in figure 4e , the rocker 4 has reached its extreme position. In this position, the display in window 8 shows that display crown 2 has performed part of its rotation. The remainder of the rotation of the display crown then occurs under the effect of the positioning device 10 of the display crown 2, as already explained. The indication corresponding to the date “one” is then fully visible through window 8, as illustrated in figure 4f .

Entraîné par la roue 5 de vingt-quatre heures, le doigt 6 continue sa rotation, laissant ainsi chuter la bascule 4. Lors de cette chute, le cliquet 4b s'escamote et laisse passer la dent 16/17. Il se retrouve alors en appui contre la dent 17/18 suivante lorsque palpeur revient en appui contre la came de douze 3. Il pointe typiquement au milieu de la largeur de la dent 17/18. Cette position est illustrée à la figure 4g.Driven by the twenty-four hour wheel 5, the finger 6 continues its rotation, thus letting the lever 4 fall. During this fall, the pawl 4b retracts and lets the tooth 16/17 pass. It then finds itself resting against the next tooth 17/18 when the probe comes back to rest against the cam of twelve 3. It typically points in the middle of the width of the tooth 17/18. This position is illustrated on figure 4g .

De plus, lors de la rotation de la couronne d'affichage de quantième 2, entre le trente-et-un mars et le premier avril, la seconde dent spéciale 14 de la couronne d'affichage 2 a entraîné la rotation d'un pas de l'étoile de douze 16 et donc le positionnement de la came de douze 3 sur le mois d'avril qui est un mois de trente jours (palpeur 4a dans un creux à la figure 4g). La rotation de l'étoile de douze 16 est illustrée aux figures 4e et 4f.In addition, during the rotation of the date display crown 2, between March 31 and April 1, the special second tooth 14 of the display crown 2 caused the rotation by one step of the star of twelve 16 and therefore the positioning of the cam of twelve 3 on the month of April which is a month of thirty days (probe 4a in a hollow at the figure 4g ). The rotation of the star of twelve 16 is illustrated in figures 4e and 4f .

Le fonctionnement du mécanisme 1 lors du passage du quantième trente d'un mois au premier quantième du mois suivant lors des mois de moins de trente-et-un jours est décrit plus en détails ci-dessous en référence aux figures 5a à 5f.The operation of the mechanism 1 during the passage from the thirty-month date of a month to the first date of the following month during months of less than thirty-one days is described in more detail below with reference to figures 5a to 5f .

La figure 5a illustre le mécanisme 1 le trente avril en fin de journée. Le palpeur 4a de la bascule 4 se trouve en appui contre une partie creusée de la came de douze 3 indiquant qu'il s'agit d'un mois de moins de trente-et-un jours. Dans cette position, l'extrémité 4b' du cliquet 4b est maintenue, par le ressort de cliquet 11, en appui contre la deuxième 13b des deux petites dents lui faisant face, c'est-à-dire entre les deux petites dents 13a, 13b. Lorsque, en fin de journée, la bascule 4 est actionnée par le doigt 6 de la roue 5 de vingt-quatre heures, elle pivote et son cliquet 4b vient entraîner la couronne d'affichage 2 en rotation dans le sens horaire en agissant sur la première petite dent 13a de la couronne de quantième 2. Cela est illustré à la figure 5b. La butée 12 empêche l'extrémité 4b' du cliquet 4b de s'escamoter lors du soulèvement de la bascule 4. Elle permet de maintenir l'extrémité 4b' du cliquet 4b dans la trajectoire de la première petite dent 13a et participe donc à l'entraînement de la couronne d'affichage 2 en rotation.The figure 5a illustrates mechanism 1 on April 30 at the end of the day. The feeler 4a of the rocker 4 rests against a hollowed out part of the twelve cam 3 indicating that it is a month less than thirty-one days. In this position, the end 4b 'of the pawl 4b is held, by the pawl spring 11, resting against the second 13b of the two small teeth facing it, that is to say between the two small teeth 13a, 13b. When, at the end of the day, the rocker 4 is actuated by the finger 6 of the twenty-four hour wheel 5, it pivots and its pawl 4b drives the display crown 2 in clockwise rotation by acting on the first small tooth 13a of date crown 2. This is illustrated on figure 5b . The stop 12 prevents the end 4b 'of the pawl 4b from retracting during the lifting of the lever 4. It keeps the end 4b' of the pawl 4b in the path of the first small tooth 13a and therefore participates in the 'drive the display crown 2 in rotation.

Dans l'état représenté à la figure 5b, la bascule 4 n'a pas atteint sa position extrême. Dans cette position, l'affichage dans le guichet 8 montre que la couronne d'affichage 2 a commencé sa rotation d'un pas vers l'affichage du quantième « trente-et-un ». Le reste de la rotation de la couronne d'affichage 2 se produit ensuite sous l'effet du dispositif de positionnement 10 qui aide ladite couronne 2 à terminer son pas. A ce moment-là, sous l'effet de la rotation de la couronne d'affichage 2 le cliquet 4b s'escamote et laisse passer la deuxième petite dent 13b. L'indication correspondant au quantième trente-et-un est alors entièrement visible à travers le guichet 8, comme illustré à la figure 5c. Mais cela ne dure que très peu de temps. En effet, à ce stade la bascule 4 continue sa rotation dans le sens horaire si bien que le cliquet 4b vient à nouveau entraîner la couronne d'affichage 2 en rotation dans le sens horaire en agissant sur la deuxième petite dent 13b de la couronne de quantième 2. Cela est illustré à la figure 5d.In the state shown in figure 5b , the rocker 4 has not reached its extreme position. In this position, the display in window 8 shows that display crown 2 has started its rotation by one step towards the display of the “thirty-one” date. The remainder of the rotation of the display crown 2 then occurs under the effect of the positioning device 10 which helps said crown 2 to complete its step. At this time, under the effect of the rotation of the display crown 2, the pawl 4b retracts and lets the second small tooth 13b pass. The indication corresponding to the thirty-one date is then fully visible through window 8, as illustrated in figure 5c . But it only lasts a very short time. Indeed, at this stage the rocker 4 continues its rotation in the clockwise direction so that the pawl 4b again drives the display crown 2 in clockwise rotation by acting on the second small tooth 13b of the control ring. date 2. This is illustrated on figure 5d .

Dans l'état représenté à la figure 5d, la bascule 4 a atteint sa position extrême. Dans cette position, l'affichage dans le guichet 8 montre que la couronne d'affichage 2 a effectué une partie de sa rotation d'un pas vers l'affichage du quantième « un ». Le reste de la rotation de la couronne d'affichage 2 se produit ensuite sous l'effet du dispositif de positionnement 10 de la couronne d'affichage 2 qui aide cette dernière à terminer son pas. L'indication correspondant au quantième « un » est alors entièrement visible à travers le guichet 8, comme illustré à la figure 5e.In the state shown in figure 5d , the rocker 4 has reached its extreme position. In this position, the display in aperture 8 shows that the display crown 2 has performed part of its rotation by one step towards the display of the date "one". The remainder of the rotation of the display crown 2 then occurs under the effect of the positioning device 10 of the display crown 2 which helps the latter to complete its step. The indication corresponding to the date “one” is then fully visible through window 8, as illustrated in figure 5e .

Entraîné par la roue 5 de vingt-quatre heures, le doigt 6 continue sa rotation, laissant ainsi chuter la bascule 4. Lors de cette chute le cliquet 4b s'escamote et laisse passer la dent 16/17. Il se retrouve donc en appui contre la dent 17/18 suivante et le palpeur 4a revient en appui contre la came de douze 3. Cette position est illustrée à la figure 5f.Driven by the twenty-four hour wheel 5, the finger 6 continues its rotation, thus letting the lever 4 fall. During this fall, the pawl 4b retracts and lets the tooth 16/17 pass. It is therefore found resting against the next tooth 17/18 and the probe 4a comes back to rest against the cam of twelve 3. This position is illustrated on figure 5f .

De plus, lors de la rotation de la couronne d'affichage de quantième 2, entre le trente avril et le premier mai, la seconde dent spéciale 14 de la couronne d'affichage 2 a entraîné la rotation d'un pas de l'étoile de douze 16 et donc le positionnement de la came de douze 3 dans une position correspondant au mois suivant, le mois de mai, qui est un mois de trente-et-un jours. La rotation de l'étoile de douze 16 est illustrée notamment aux figures 5d et 5e.In addition, during the rotation of the date display crown 2, between April 30 and May 1, the second special tooth 14 of the display crown 2 caused the star to rotate by one step. of twelve 16 and therefore the positioning of the cam of twelve 3 in a position corresponding to the following month, the month of May, which is a month of thirty-one days. The rotation of the star of twelve 16 is illustrated in particular in figures 5d and 5th .

Le mécanisme de quantième 1 selon l'invention permet le passage correct de l'affichage de quantième en fin de mois que le mois soit un mois de trente jours ou un mois de trente-et-un jours. Les mois de trente jours, dans la nuit du trente au premier, le trente du mois est suivi du premier sans intervention manuelle.The date mechanism 1 according to the invention allows the correct passage of the date display at the end of the month whether the month is a month of thirty days or a month of thirty-one days. The thirty-day months, on the night of the thirtieth to the first, the thirtieth of the month is followed by the first without manual intervention.

Pour obtenir cela, le mécanisme de quantième 1 présente l'avantage de comprendre une couronne d'affichage dont seule la denture intérieure, située sur un seul niveau, permet sa mise en rotation. Il prend donc moins d'espace que les mécanismes de quantième de ce type selon l'art antérieur. De plus, il présente également l'avantage de ne nécessiter qu'un seul cliquet pour l'actionnement de la couronne d'affichage de quantième 2.To achieve this, the date mechanism 1 has the advantage of comprising a display crown of which only the internal teeth, located on a single level, allow it to be set in rotation. It therefore takes up less space than date mechanisms of this type according to the prior art. In addition, it also has the advantage of requiring only a single pawl for actuating the date display crown 2.

Il apparaîtra clairement à l'homme du métier que la présente invention n'est en aucun cas limitée au mode de réalisation présenté ci-dessus et illustré dans les figures.It will be clear to those skilled in the art that the present invention is in no way limited to the embodiment presented above and illustrated in the figures.

Dans le mode de réalisation illustré, la came des mois 3 comporte douze portions angulaires avec des parties creuses et non creuses correspondants respectivement aux mois de moins de trente-et-un jours et aux mois de trente-et-un jours et est associée à une étoile de douze 16 à douze dents. Il est clair que la came des mois pourrait prendre des formes différentes pour autant que sa fonction ne soit pas altérée. Elle pourrait notamment comprendre un nombre de portions angulaires multiple de douze et être associée à une étoile comprenant un nombre de dents correspondant à ce nombre de portions angulaires. Le mécanisme pourrait également être ajusté pour que les creux correspondent aux mois de trente-et-un jours et les parties planes aux mois de moins de trente-et-un jours.In the illustrated embodiment, the month cam 3 comprises twelve angular portions with hollow and non-hollow parts corresponding respectively to months of less than thirty-one days and to months of thirty-one days and is associated with a star of twelve 16 with twelve teeth. It is clear that the cam of the months could take different forms as long as its function is not impaired. It could in particular comprise a number of angular portions which is a multiple of twelve and be associated with a star comprising a number of teeth corresponding to this number of angular portions. The mechanism could also be adjusted so that the valleys correspond to months of thirty-one days and the flat parts to months of less than thirty-one days.

Le mécanisme de quantième 1 illustré aux figures 1 à 5f est un mécanisme de quantième annuel et se comporte au mois de février comme si celui-ci avait trente jours. Le mécanisme pourrait être modifié pour qu'il se comporte au mois de février comme si celui-ci avait trente-et-un jours. En outre, l'homme du métier pourrait aisément l'adapter, notamment par l'ajout d'une came d'années bissextiles, pour en faire un quantième perpétuel.The date mechanism 1 illustrated in figures 1 to 5f is an annual calendar mechanism and behaves in February as if it had thirty days. The mechanism could be modified so that it behaves in February as if it had thirty-one days. In addition, a person skilled in the art could easily adapt it, in particular by adding a leap year cam, to make it a perpetual calendar.

Comme indiqué précédemment, le mécanisme de quantième selon l'invention est typiquement fixé sur un bâti tel qu'une platine ou un pont d'un mouvement horloger. Le mécanisme de quantième selon l'invention peut également posséder son propre bâti, typiquement une planche additionnelle, qui pourra être rendu solidaire du bâti dudit mouvement horloger.As indicated above, the date mechanism according to the invention is typically fixed to a frame such as a plate or a bridge of a watch movement. The date mechanism according to the invention can also have its own frame, typically an additional plate, which can be made integral with the frame of said watch movement.

Il semble en outre évident que le mécanisme de quantième 1 peut être adapté pour que les dents dites « spéciales » soient positionnées ailleurs sur la denture intérieure de la couronne d'affichage de quantième 2. De plus, leur forme peut également être modifiée tant que leur fonction est conservée.It also seems obvious that the date mechanism 1 can be adapted so that the so-called “special” teeth are positioned elsewhere on the watch. internal toothing of the date display crown 2. In addition, their shape can also be changed as long as their function is retained.

Typiquement, les deux dents 13a, 13b de la première dent spéciale 13 de largeur « l » pourraient ne pas avoir la même largeur de sorte que la creusure les séparant ne se situerait pas au milieu de la largeur « l » de la première dent spéciale 13 mais à une distance correspondant à x% de « l » par rapport à une extrémité de cette dent 13, la position de cette extrémité étant considérée par rapport à un sens de rotation prédéterminé. Le mécanisme 1 serait alors adapté pour que, lors des quantièmes un à vingt-neuf des mois de moins de trente-et-un jours, l'extrémité 4b' du cliquet 4b se positionne en appui contre une dent de la denture intérieure de la couronne d'affichage 2, à une même distance de x% de « l » à partir de l'extrémité de cette dent considérée par rapport au même sens de rotation prédéterminé.Typically, the two teeth 13a, 13b of the first special tooth 13 of width "l" could not have the same width so that the recess separating them would not be located in the middle of the width "l" of the first special tooth. 13 but at a distance corresponding to x% of "l" with respect to one end of this tooth 13, the position of this end being considered with respect to a predetermined direction of rotation. The mechanism 1 would then be adapted so that, during the days one to twenty-nine of the months of less than thirty-one days, the end 4b 'of the pawl 4b is positioned resting against a tooth of the internal teeth of the display crown 2, at the same distance of x% of “l” from the end of this tooth considered with respect to the same predetermined direction of rotation.

Le dispositif de positionnement 10 illustré dans les figures 1 à 5f est un dispositif comprenant un sautoir 10a associé à un mobile, ledit mobile comprenant une étoile à cinq dents 10b et une roue à dents larges 10c. La largeur des dents de ladite roue à dents larges 10c correspond typiquement à la distance séparant deux dents de la denture intérieure de la couronne de quantième 2. L'étoile à cinq dents est positionnée par un sautoir 10a « classique » fixé sur la platine 100 et la roue à dents larges 10c coopère avec la denture de la couronne d'affichage 2. Un tel dispositif de positionnement 10 pourrait être remplacé par un sautoir classique (tel que le sautoir 10a).The positioning device 10 illustrated in figures 1 to 5f is a device comprising a jumper 10a associated with a mobile, said mobile comprising a star with five teeth 10b and a wheel with wide teeth 10c. The width of the teeth of said wide-toothed wheel 10c typically corresponds to the distance separating two teeth of the internal teeth of the date crown 2. The five-tooth star is positioned by a “conventional” jumper 10a fixed on the plate 100. and the wide toothed wheel 10c cooperates with the teeth of the display crown 2. Such a positioning device 10 could be replaced by a conventional jumper (such as the jumper 10a).

Au lieu d'être monté sur la bascule 4, le cliquet 4b pourrait être venu d'une pièce avec la bascule 4 tout en restant mobile en rotation par rapport à cette bascule 4.Instead of being mounted on the rocker 4, the pawl 4b could have come integrally with the rocker 4 while remaining movable in rotation with respect to this rocker 4.

La roue 5 de vingt-quatre heures pourrait être entraînée en rotation autrement que via la roue des heures 18 du rouage de minuterie du mouvement horloger dans lequel est intégré le mécanisme 1.The twenty-four hour wheel 5 could be driven in rotation other than via the hours wheel 18 of the timer train of the watch movement in which the mechanism 1 is integrated.

Bien évidemment, les sens de pivotement des différents organes pourraient être modifiés.Obviously, the directions of pivoting of the various members could be modified.

Dans d'autres variantes, il est évident que la forme des différents organes décrits peut varier à l'infini pour autant que leurs fonctions soient assurées.In other variants, it is obvious that the shape of the various organs described can vary ad infinitum as long as their functions are fulfilled.

Dans le mode de réalisation décrit, le dispositif de positionnement 10 participe à la mise en rotation de la couronne d'affichage 2, la bascule n'ayant pas besoin d'engendrer à elle seule le déplacement d'un pas complet de la couronne d'affichage 2. Cela a pour but de limiter la consommation d'énergie nécessaire pour lever la bascule 4. Cependant, il est très bien envisageable de concevoir le mécanisme de quantième selon l'invention de sorte que la bascule 4 puisse, à elle seule, via son cliquet 4b, engendrer la rotation d'un pas complet de la couronne d'affichage 2.In the embodiment described, the positioning device 10 participates in the rotation of the display crown 2, the rocker not needing to cause by itself the displacement of a complete step of the crown d. 'display 2. This is intended to limit the energy consumption necessary to raise the latch 4. However, it is very well conceivable to design the date mechanism according to the invention so that the latch 4 can, on its own , using its pawl 4b, cause the display ring 2 to rotate one full step.

Claims (15)

  1. Date mechanism (1) comprising a display crown (2) with an internal tooth arrangement carrying day-of-the-month indications (7) ranging from one to thirty one and intended to be designated in succession in order to indicate the day of the month, one tooth of the internal tooth arrangement of the display crown (2) being replaced by a drive member (13) of a different shape to that of the teeth of said tooth arrangement, a month cam (3), the angular position of which is indicative of the number of days in the current month and a lever (4) comprising a feeler spindle (4a) and a pawl (4b), said lever (4) being intended to be rotationally driven from a position in which its feeler spindle (4a) abuts against said month cam (3), this position depending on the number of days in the month, to a predetermined position, the whole being arranged so that:
    - whatever the number of days in the current month, when the day of the month is between one and twenty nine inclusive, upon each rotation of the lever (4) from the position in which its feeler spindle (4a) abuts against the month cam (3) to said predetermined position, the pawl (4b) cooperates with a tooth of the internal tooth arrangement of the display crown (2) to drive the rotation by one step of said display crown (2), the designated day-of-the-month indication (7) thus being incremented by one unit;
    - when the day of the month is thirty:
    ∘ if the current month is a thirty-day month, under the effect of the rotation of the lever (4) from the position in which its feeler spindle (4a) abuts against the month cam (3), the pawl (4b) cooperates with a first part (13a) of the drive member (13) to drive the rotation of said display crown (2) by a first step, then cooperates with a tooth of the internal tooth arrangement of the display crown (2) adjacent to the drive member (13) to drive the display crown (2) by a second step, the designated day-of-the-month indication (7) thus passing from thirty to thirty one, then from thirty one to one consecutively; and
    ∘ if the current month is a thirty one-day month, under the effect of the rotation of the lever (4) from the position in which its feeler spindle (4a) abuts against the month cam (3) to its predetermined position, the pawl (4b) cooperates with a tooth of the internal tooth arrangement of the display crown (2) adjacent to the drive member (13) to drive the rotation of said display crown (2) by one step, the designated day-of-the-month indication (7) thus passing from thirty to thirty one,
    - when the day of the month is thirty one, under the effect of the rotation of the lever (4) from the position in which its feeler spindle (4a) abuts against the month cam (3) to its predetermined position, the pawl (4b) cooperates with a second part (13b) of the drive member (13) to drive the rotation of said display crown (2) by one step, the designated day-of-the-month indication (7) thus passing from thirty one to one.
  2. Date mechanism (1) as claimed in claim 1, characterised in that said display crown (2) corresponds to a crown comprising thirty one teeth uniformly distributed around its internal contour, one of which has been replaced by said drive member (13).
  3. Date mechanism (1) as claimed in any one of claims 1 and 2, characterised in that the indication designated to indicate the day of the month is designated by means of an aperture (8), a marker such as a hand or a motif and/or by a revealing device such as a facet through which, or on which, the user can read the indication designated.
  4. Date mechanism (1) as claimed in any one of claims 1 to 3, characterised in that said drive member (13) is in the form of a first special tooth (13) of the same width "1" as that of the other teeth of the internal tooth arrangement of the display crown (2), said special tooth (13) comprising a hollow in a zone of its width, typically in the middle of its width, so as to define a first (13a) and a second (13b) tooth separated by said hollow, the mechanism (1) being arranged so that on the thirtieth of the month, when the feeler spindle (4a) abuts against the month cam (3) :
    - if the current month is a thirty-day month, the pawl (4b) is located between said two teeth (13a, 13b) of the special tooth (13); and
    - if the current month is a thirty one-day month, the pawl (4b) is located in abutment against the first (13a) of said two teeth (13a, 13b) of the special tooth (13), outside of the hollow.
  5. Date mechanism (1) as claimed in claim 4, characterised in that it is arranged so that, when the day of the month is between one and twenty nine inclusive, in the position in which the feeler spindle (4a) of the lever (4) abuts against the month cam (3):
    ∘ if the current month is a thirty-day month, the pawl (4b) is located in abutment against a tooth of the internal tooth arrangement of the display crown (2) in a zone of its width "1" corresponding to the zone of the width "1" of the special tooth (13) comprising the hollow so that if said tooth were replaced by the special tooth (13), the pawl (4b) would be located in the hollow of the special tooth (13); and
    ∘ if the current month is a thirty one-day month, the pawl (4b) is located in abutment against a tooth of the internal tooth arrangement of the display crown (2).
  6. Date mechanism (1) as claimed in any one of the preceding claims, characterised in that said month cam (3) is coaxial and arranged for conjoint rotation with a starwheel (16), said starwheel (16) being rotationally driven upon each rotation of the display crown (2) between the position in which the indication of day thirty one is designated and the position in which the indication of day one is designated.
  7. Date mechanism (1) as claimed in claim 6, characterised in that a tooth of the internal tooth arrangement of the display crown (2) other than that replaced by said first special tooth (13) is replaced by a second special tooth, the shape of which permits said starwheel (16) to be rotationally driven by one step upon each passage from day thirty one of a month to day one of the following month.
  8. Date mechanism (1) as claimed in any one of the preceding claims, characterised in that the lever (4) has distinct first and second positions in which its feeler spindle (4a) abuts against the month cam (3), these first and second positions corresponding respectively to months of thirty and of thirty one days.
  9. Date mechanism (1) as claimed in any one of the preceding claims, characterised in that the lever (4) is rotationally driven by a finger (6) pivoting about an axis of rotation (A1) distinct from that (O) of the lever (4) at a rate of one turn in twenty four hours.
  10. Date mechanism (1) as claimed in claim 9, characterised in that said finger (6) is rotationally driven by an element (15) carried by a toothed wheel (5), said toothed wheel (5) being kinematically connected to the motion work train, for example, to the hour wheel (18), of a timepiece movement so that it pivots about said axis (A1) at a rate of one turn in twenty four hours in a predetermined direction.
  11. Date mechanism (1) as claimed in claim 10, characterised in that said element (15) is retractable so that the finger (6) is rotationally driven by said element (15) only when the toothed wheel (5) pivots in said predetermined direction.
  12. Date mechanism (1) as claimed in any one of the preceding claims, characterised in that it further comprises a positioning device (10) comprising a jumper (10a) permitting said display crown (2) to be positioned.
  13. Date mechanism (1) as claimed in any one of the preceding claims, characterised in that the month cam is a cam comprising a number of angular sectors, which is a multiple of twelve, these angular sectors comprising series of non-hollowed parts and hollowed parts of the same depths corresponding respectively to the thirty one-day months and to the months of less than thirty one days or vice versa.
  14. Module for a timepiece, characterised in that it comprises a date mechanism as claimed in any one of claims 1 to 13 and a frame such as a plate on which said mechanism is fixed.
  15. Timepiece such as a pocket watch or wrist watch, characterised in that it comprises a date mechanism (1) as claimed in any one of claims 1 to 13 or a module as claimed in claim 14.
EP18201841.6A 2018-10-22 2018-10-22 Date mechanism Active EP3644130B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP18201841.6A EP3644130B1 (en) 2018-10-22 2018-10-22 Date mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18201841.6A EP3644130B1 (en) 2018-10-22 2018-10-22 Date mechanism

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EP3644130A1 EP3644130A1 (en) 2020-04-29
EP3644130B1 true EP3644130B1 (en) 2021-04-07

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4383015A1 (en) * 2022-12-09 2024-06-12 Patek Philippe SA Genève Clock device for transforming a first rotation into a second rotation, at least in part a saccaded

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE602005001798T8 (en) 2004-05-14 2008-08-28 Rolex Sa Annual calendar mechanism for clockwork
EP1666991B1 (en) 2004-12-02 2011-06-01 ETA SA Manufacture Horlogère Suisse Annual calendar mechanism for a timepiece
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

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Title
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