EP2884349B1 - Method for controlling an analogue display provided on a watch movement - Google Patents

Method for controlling an analogue display provided on a watch movement Download PDF

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Publication number
EP2884349B1
EP2884349B1 EP13197171.5A EP13197171A EP2884349B1 EP 2884349 B1 EP2884349 B1 EP 2884349B1 EP 13197171 A EP13197171 A EP 13197171A EP 2884349 B1 EP2884349 B1 EP 2884349B1
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EP
European Patent Office
Prior art keywords
indicator
positions
display
motor
control method
Prior art date
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Active
Application number
EP13197171.5A
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German (de)
French (fr)
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EP2884349A1 (en
Inventor
Pascal Lagorgette
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ETA SA Manufacture Horlogere Suisse
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ETA SA Manufacture Horlogere Suisse
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Application filed by ETA SA Manufacture Horlogere Suisse filed Critical ETA SA Manufacture Horlogere Suisse
Priority to EP13197171.5A priority Critical patent/EP2884349B1/en
Priority to US14/562,824 priority patent/US9389589B2/en
Priority to KR1020140179442A priority patent/KR101695068B1/en
Priority to JP2014251647A priority patent/JP6001628B2/en
Priority to CN201410777801.9A priority patent/CN104714394B/en
Publication of EP2884349A1 publication Critical patent/EP2884349A1/en
Priority to HK15108433.1A priority patent/HK1207910A1/en
Application granted granted Critical
Publication of EP2884349B1 publication Critical patent/EP2884349B1/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
    • 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
    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
    • G04C3/14—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means incorporating a stepping motor
    • 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
    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C17/00—Indicating the time optically by electric means
    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C17/00—Indicating the time optically by electric means
    • G04C17/005—Indicating the time optically by electric means by discs
    • G04C17/0058—Indicating the time optically by electric means by discs with date indication
    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
    • G04C3/14—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means incorporating a stepping motor
    • G04C3/146—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means incorporating a stepping motor incorporating two or more stepping motors or rotors

Definitions

  • the present invention relates to the field of watch movements equipped with an analog display of several parameters, at least part of which relates to time data. Other displayed parameters can be associated with various functions or with the selection of such functions.
  • the present invention relates in particular to electronic watch movements comprising an analog display driven by one or more electromechanical motors.
  • the analog display includes a chrono hand, in particular a minute hand of the timed time interval, associated with a 360 ° circular graduation, as well as a display of the date (date) using a date ring, the displayed date conventionally appearing in a window on the dial.
  • first mechanism the mechanism for driving the chrono hand
  • second mechanism the mechanism for driving the date ring
  • the first mechanism comprises an intermediate wheel driven directly by the motor rotor and a chrono wheel which meshes with the intermediate wheel.
  • the second mechanism also includes said intermediate wheel and further an auxiliary wheel meshing with this intermediate wheel.
  • the auxiliary wheel is integral with a mobile for periodic actuation of a drive wheel for the date ring, this mobile having an actuating finger for this drive wheel.
  • the periodic actuator and the drive wheel together form a Geneva mechanism, known for the periodic drive of a date ring / disc.
  • the finger drives the drive wheel of the date ring, which is rotated over an angular distance corresponding to the passage from one calendar to the next calendar in the window of the dial provided for the date display.
  • the Geneva mechanism is therefore characterized by a periodic drive of the drive wheel of the date ring, the mobile of periodic actuation meshing with this drive wheel only on an angular sector less than 360 °, while this mobile locks the drive wheel on the complementary angular sector.
  • the periodic actuating mobile rotates while it is positioned in the complementary angular sector, the rotational movement of the rotor is not transmitted to the date ring.
  • the document US 6,185,158 uses the Geneva mechanism to allow the motor used for the date training to perform an additional function, namely the training of a chrono hand.
  • the method consists in driving the chrono hand when said periodic actuation mobile is in its non-actuation zone, that is to say in said complementary angular sector, and at the end of the interval of timed time a reverse reset to bring the periodic actuator back to a predefined initial position.
  • the chrono hand will do only one only one revolution and that the drive of this chrono hand over an entire revolution leaves the mobile for periodic actuation in its non-actuation zone.
  • the method for controlling the analog display device of a chronograph and date hand poses at least one major objective problem. Indeed, this process is essentially limited to a chrono hand displaying the upper unit of time which is counted by the chrono display. Indeed, if we wanted to introduce an hour counter (for example up to three hours) in addition to the 10-minute counter provided ( FIG.1 ), the proposed control method is no longer suitable because said periodic actuating mobile is then capable of performing eighteen laps over the maximum time interval that can be timed; which in the example set out in the patent US 6,185,158 would lead to the passage of four calendar days during the timed time.
  • the object of the present invention is to solve the abovementioned problems of the cited prior art.
  • the subject of the present invention is a method for controlling an analog display device fitted to a watch movement, the method being defined in independent claim 1.
  • the method according to the invention solves the problems of the prior art by the introduction of a backward rotation, periodically, of the indicator of the above-mentioned time parameter when this indicator is on, that is to say - say when the function it displays is activated and therefore when the displayed time parameter gradually varies along a graduation of the circular type.
  • the chrono hand associated with the multifunctional motor can perform several successive reverses, at regular intervals and in an accelerated manner, so that, whatever the time interval, the second indicator with periodic drive remains continuously in the same given position.
  • the second display is the display of the unit or the ten of a 'big date', the display of the ten, respectively of the unit, being produced by a third indicator driven by a second motor, which also drives a fourth indicator associated with a fourth display of a time parameter.
  • the third and fourth indicators are respectively controlled like the second and first indicators according to the control method of the invention.
  • the analog display device comprises a first indicator 4 associated with a first display of a first time parameter, in particular the minutes of a timed time interval, and a second indicator 6 associated with a second display of a second parameter, in particular the date.
  • the first and second indicators are respectively associated with a first drive mechanism, formed by a first kinematic chain 10 and 12, and with a second drive mechanism formed by a second kinematic chain 10, 14 and 22. According to the invention , the first and second drive mechanisms are actuated by a single motor 16.
  • the first display comprises a graduation 18 of the circular type and the first drive mechanism is arranged so as to allow the first indicator to indicate cyclically the value of the first time parameter by turning in the same direction of rotation, the latter defining the direction before for the first indicator.
  • the second indicator is driven periodically, that is to say intermittently, during the actuation of the electromechanical motor 16.
  • the second drive mechanism comprises a periodic actuation mobile 22 which can successively take a set of positions indicated by divisions 24 and 26 and index 28 on the Figure 1 . Note that these divisions and this index have been added to the Figure 1 for the purposes of describing the invention.
  • the watch movement 2 does not include such a graduation and such an index since it is in no way a display of this watch movement.
  • the mobile 22 performs a small rotation corresponding to a division.
  • This periodic actuator is arranged so that it drives the second indicator when it is in a first subset of positions 24 of said set of positions and when it is driven by the motor from a position to the another among the first subset of positions.
  • the second indicator remains substantially stationary when the mobile for periodic actuation is driven by the motor 16 from one position to another in a second subset of positions 26 of the set of positions, this second subset of positions comprising a plurality of positions.
  • first and second drive mechanisms are arranged in such a way that the first indicator 4 can progressively indicate at least one complete cycle of the first time parameter, that is to say perform one complete revolution, while the mobile d periodic actuation remains in the second subset of positions.
  • the end of the first period corresponds to a position of the first indicator 4, on the circular type graduation 18, which defines the end of a cycle and the start of a following cycle, that is to say to say on the Figure 1 at position '60' combined with position '0'.
  • the journey made in the rear direction by the first indicator during a second period corresponds substantially to the journey made in the forward direction by this first indicator during the first period directly preceding this second period.
  • the first subset of positions (index 28 opposite divisions 24 at the Figure 1 ) defines an actuation area (angular sector a) of the second indicator 6 while the second subset of positions defines a non-actuation area (angular sector complementary to the angular sector a) of this second indicator.
  • the second indicator is incremented by one each time the mobile for periodic actuation is passed. through a continuous actuation zone, that is to say an uninterrupted one.
  • the first indicator performs a whole number of turns simultaneously, so as not to modify the position of this first indicator if it is inactive (its final position after the actuation of the second indicator is identical to its initial position) or not to induce an error in the display of the first indicator after the position of the second indicator changes if this first indicator is active, i.e. in operation.
  • FIG. 2 A preferred embodiment of a watch movement 30 suitable for the control method of the invention is shown in Figure 2 .
  • the first indicator 4 is a chrono hand or a '24 hour 'hand associated with an off-center secondary dial.
  • the second indicator 6 is formed by a date ring.
  • the first mechanism associated with the first indicator is formed by a kinematic chain comprising a pinion 32 of the rotor 17 of the motor 16, an intermediate wheel 33 and a chrono wheel 34 integral with the chrono hand 4.
  • the second mechanism associated with the second indicator is formed by a kinematic chain comprising the first kinematic chain and in addition a periodic actuating mobile 36 associated with a Maltese cross 40, the latter being integral with a pinion 42 which meshes with the internal toothing 44 of the ring of 6.
  • the mobile 36 comprises a plate with an external toothing which meshes with a pinion of the chrono wheel. Above its plate, the mobile 36 comprises a central core 37 of oblong shape with two ends in an arc of a circle as well as two pins 38 and 39 aligned orthogonally to the longitudinal axis of the core.
  • the Maltese cross comprises six branches 41 of flared shape and having between them spaces allowing the pins 38 and 39 to penetrate alternately between two branches to entrain periodically this Maltese cross.
  • the periodic actuator 36 has an actuation zone formed by two angular sectors having angles at the center ⁇ 1 and ⁇ 2 , and a non-actuation zone formed by two angular sectors having angles at the center ⁇ 1 and ⁇ 2 .
  • the various angular sectors mentioned above are defined in Figure 2 by two straight lines 50 and 52 in broken lines. These two lines define the actuation zone relative to a reference line 48 passing through the centers of the mobile 56 and the Maltese cross 40.
  • the mobile 36 may have only one pin (for example pin 38) and the actuation zone is then formed by a single angular sector with an angle at the center ⁇ 1 .
  • the complementary sector then defines the non-actuation zone.
  • the core has a circular periphery substantially over the entire non-actuation zone.
  • the Maltese cross device is advantageous in that the central core blocks the Maltese cross in the non-actuation zone thanks to the corresponding profile of the branches 41; which ensures that the date ring is kept in a stable position outside the planned actuation periods.
  • the gear ratio between the chrono wheel 34 and the mobile 36 is such that the chrono wheel can make several turns while the mobile 56 remains in a sector of its non-actuation zone.
  • the control method according to the invention can easily be implemented with the one and the same motor 16 and the two indicators 4 and 6. It will be noted that the periods of rotation in the reverse direction of the indicator 4 when it is in active mode, to prevent the mobile 56 from entering one of the sectors of its actuation zone, can be provided successively at each complete revolution of the indicator 4 or only after a certain number of revolutions of this indicator.
  • care will be taken during the initialization of the watch movement that the mobile 36 is in an initial position sufficiently distant from the end of a non-actuating sector so that the planned number of revolutions of the chrono indicator, before its periodic backtracking in accelerated mode, can be carried out while the mobile 16 remains in this non-actuating sector. Then, when the date is actuated, care will be taken to bring the mobile 16 at the end of this function to a position substantially equivalent to the initial position in the following non-actuation sector.
  • FIG. 3 To the Figure 3 is shown schematically a watch movement 56 in which the control method according to the invention is implemented for two complementary display devices 58 and 60.
  • This movement includes a 'big date', also called a calendar with 'big window' (shown schematically in the Figure 3 by a rectangle 72 in broken lines representing a large opening in the dial of a watch fitted to the watch movement 56).
  • a 'big date' is generally formed by two separate indicators 6A and 6B respectively displaying the unit and the tenth of the date.
  • the watch movement 56 also includes a chronograph function with two small counters associated respectively with a first chrono hand 4 and a second chrono hand 5, defining in particular a display respectively of the minutes and of the timed hours or half-hours.
  • the ring 6A displaying the date unit and the first chrono hand 4, together forming the first display device 58 are both actuated by a first electromechanical motor 16A
  • the cross 6B displaying the ten of the date and the second chrono hand 5, together forming the second display device 60 are both actuated by a second electromechanical motor 16B.
  • the first display device comprises a first kinematic chain 62 between the rotor of the motor 16A and the chrono hand 4 and a second kinematic chain 63 between this needle and the ring 6A of the date units.
  • This first display device can in particular be arranged in a similar way to that described using the Figure 2 is to be controlled by the control method according to the invention described above.
  • the second display device comprises a first kinematic chain 64 between the rotor of the motor 16B and the chrono hand 5 and a second kinematic chain 65 between this needle and the cross 6B of the tens of the date.
  • the mechanism for driving the cross incorporates the mechanism for driving the chrono hand 5. In a variant, this latter mechanism can be at least partially distinct from the mechanism for driving the cross 6B, as shown in FIG. Figure 1 .
  • the kinematic chain 65 comprises a mechanism called the “Geneva mechanism” which is formed by a periodic driving mobile 66 and by a small wheel 70 or a pinion which is integral with the cross 6B and coaxial with the latter.
  • the mobile 66 comprises a circular profile over the major part of its periphery and an actuating finger 68 of the small wheel 70.
  • This small wheel comprises a toothing with eight teeth.
  • the small wheel advances by an angular distance corresponding to two teeth; which corresponds to a 90 ° rotation and therefore the passage from one branch of the cross to the next in the large window 72 of the dial.
  • the teeth of the small wheel 70 and the profile of the mobile 66 in the region of the finger 68 are provided so that the small wheel is blocked by the mobile 66 when the finger 68 does not drive it, that is to say when the mobile 66 is in its non-actuation zone.
  • the kinematic chain 65 is arranged so that the chrono hand 5 can carry out at least one complete turn, preferably several turns, as long as the mobile 66 remains in its non-actuation zone.
  • the indicators 5 and 6B of the second display device 60 are respectively also controlled according to the control method of the invention described above. Other long-standing variants with two rings or with coaxial or non-coaxial discs can be driven in a similar manner according to the method of the invention.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
  • Measurement Of Unknown Time Intervals (AREA)

Description

Domaine techniqueTechnical area

La présente invention concerne le domaine des mouvements horlogers équipés d'un affichage analogique de plusieurs paramètres dont au moins une partie concerne des données temporelles. D'autres paramètres affichés peuvent être associés à diverses fonctions ou à la sélection de telles fonctions. La présente invention concerne en particulier les mouvements horlogers électroniques comprenant un affichage analogique entraîné par un ou plusieurs moteurs électromécaniques.The present invention relates to the field of watch movements equipped with an analog display of several parameters, at least part of which relates to time data. Other displayed parameters can be associated with various functions or with the selection of such functions. The present invention relates in particular to electronic watch movements comprising an analog display driven by one or more electromechanical motors.

Arrière-plan technologiqueTechnological background

Il est connu notamment du document US 6,185,158 une montre électronique équipée d'un affichage analogique de plusieurs paramètres temporelles, en particulier de l'heure, de la minute et de la seconde au moyen de trois aiguilles coaxiales situées au centre du cadran de la montre. En outre, l'affichage analogique comprend une aiguille de chrono, en particulier une aiguille des minutes de l'intervalle de temps chronométré, associée à une graduation circulaire sur 360°, ainsi qu'un affichage du quantième (date) à l'aide d'un anneau des quantièmes, le quantième affiché apparaissant classiquement dans une fenêtre du cadran. Ce document propose d'actionner le mécanisme d'entraînement de l'aiguille de chrono (ci-après premier mécanisme) et le mécanisme d'entraînement de l'anneau des quantièmes (ci-après second mécanisme) par un seul et même moteur électromécanique. Dans le cadre de la réalisation décrite, le premier mécanisme ne doit pas être associé à l'affichage de l'heure, de la minute ou de la seconde courantes ou d'une autre fonction liée à ces paramètres temporels, alors que le second mécanisme doit être du type à entraînement intermittent, comme c'est le cas pour l'affichage du quantième.It is known in particular from the document US 6,185,158 an electronic watch equipped with an analog display of several time parameters, in particular the hour, minute and second by means of three coaxial hands located in the center of the watch dial. In addition, the analog display includes a chrono hand, in particular a minute hand of the timed time interval, associated with a 360 ° circular graduation, as well as a display of the date (date) using a date ring, the displayed date conventionally appearing in a window on the dial. This document proposes to actuate the mechanism for driving the chrono hand (hereinafter first mechanism) and the mechanism for driving the date ring (hereinafter second mechanism) by a single electromechanical motor. . In the context of the embodiment described, the first mechanism must not be associated with the display of the current hour, minute or second or of any other function linked to these time parameters, while the second mechanism must be of the intermittent drive type, as is the case for the date display.

Le premier mécanisme comprend une roue intermédiaire entraînée directement par le rotor du moteur et une roue de chrono qui engrène avec la roue intermédiaire. Le second mécanisme comprend également ladite roue intermédiaire et en outre une roue auxiliaire engrenant avec cette roue intermédiaire. La roue auxiliaire est solidaire d'un mobile d'actionnement périodique d'une roue d'entraînement de l'anneau de quantième, ce mobile présentant un doigt d'actionnement de cette roue d'entraînement. Le mobile d'actionnement périodique et la roue d'entraînement forment ensemble un mécanisme de Genève, connu pour l'entraînement périodique d'un anneau / disque de quantième. A chaque tour du mobile d'actionnement périodique, le doigt entraîne la roue d'entraînement de l'anneau des quantièmes, lequel est entraîné en rotation sur une distance angulaire correspondant au passage d'un quantième au quantième suivant dans la fenêtre du cadran prévue pour l'affichage du quantième. Le mécanisme de Genève est donc caractérisé par un entraînement périodique de la roue d'entraînement de l'anneau des quantièmes, le mobile d'actionnement périodique engrenant avec cette roue d'entraînement seulement sur un secteur angulaire inférieur à 360°, alors que ce mobile bloque la roue d'entraînement sur le secteur angulaire complémentaire. Ainsi, tant que le mobile d'actionnement périodique tourne alors qu'il se trouve positionné dans le secteur angulaire complémentaire, le mouvement de rotation du rotor n'est pas transmis à l'anneau des quantièmes.The first mechanism comprises an intermediate wheel driven directly by the motor rotor and a chrono wheel which meshes with the intermediate wheel. The second mechanism also includes said intermediate wheel and further an auxiliary wheel meshing with this intermediate wheel. The auxiliary wheel is integral with a mobile for periodic actuation of a drive wheel for the date ring, this mobile having an actuating finger for this drive wheel. The periodic actuator and the drive wheel together form a Geneva mechanism, known for the periodic drive of a date ring / disc. At each revolution of the periodic actuation mobile, the finger drives the drive wheel of the date ring, which is rotated over an angular distance corresponding to the passage from one calendar to the next calendar in the window of the dial provided for the date display. The Geneva mechanism is therefore characterized by a periodic drive of the drive wheel of the date ring, the mobile of periodic actuation meshing with this drive wheel only on an angular sector less than 360 °, while this mobile locks the drive wheel on the complementary angular sector. Thus, as long as the periodic actuating mobile rotates while it is positioned in the complementary angular sector, the rotational movement of the rotor is not transmitted to the date ring.

Le document US 6,185,158 utilise le mécanisme de Genève pour permettre au moteur utilisé pour l'entraînement du quantième d'exercer une fonction supplémentaire, à savoir l'entraînement d'une aiguille chrono. En résumé, la méthode consiste à entraîner l'aiguille chrono lorsque ledit mobile d'actionnement périodique est dans sa zone de non actionnement, c'est-à-dire dans ledit secteur angulaire complémentaire, et de faire à la fin de l'intervalle de temps chronométré un reset en marche arrière pour ramener le mobile d'actionnement périodique dans une position initiale prédéfinie. Pour ce faire, il est prévu que l'aiguille chrono ne fasse qu'un seul tour et que l'entraînement de cette aiguille chrono sur un tour entier laisse le mobile d'actionnement périodique dans sa zone de non actionnement. En effet, il est prévu d'utiliser en mode chrono l'aiguille des secondes et l'aiguille chrono des minutes. Ainsi, il n'y a pas de compteur indiquant un nombre de tours effectué par l'aiguille chrono des minutes, de sorte que l'intervalle de temps maximum pouvant être chronométré correspond à un seul tour de l'aiguille chrono en question. En stoppant le chronographe dans cet intervalle de temps maximum ou à la fin de celui-ci, on assure de ne jamais entraîner le disque des quantièmes.The document US 6,185,158 uses the Geneva mechanism to allow the motor used for the date training to perform an additional function, namely the training of a chrono hand. In summary, the method consists in driving the chrono hand when said periodic actuation mobile is in its non-actuation zone, that is to say in said complementary angular sector, and at the end of the interval of timed time a reverse reset to bring the periodic actuator back to a predefined initial position. To do this, it is expected that the chrono hand will do only one only one revolution and that the drive of this chrono hand over an entire revolution leaves the mobile for periodic actuation in its non-actuation zone. In fact, it is planned to use the second hand and the minute chrono hand in chrono mode. Thus, there is no counter indicating a number of revolutions made by the chrono minute hand, so that the maximum time interval that can be timed corresponds to a single revolution of the chrono hand in question. By stopping the chronograph in this maximum time interval or at the end of it, it is ensured never to drive the date disc.

Le procédé de commande du dispositif d'affichage analogique d'une aiguille chrono et du quantième selon l'art antérieur susmentionné pose au moins un problème objectif majeur. En effet, ce procédé est essentiellement limité à une aiguille chrono affichant l'unité de temps supérieure qui est comptabilisée par l'affichage chrono. En effet, si on souhaitait introduire un compteur des heures (par exemple jusqu'à trois heures) en plus du compteur sur 10 minutes prévu (FIG.1), le procédé de commande proposé n'est plus approprié car ledit mobile d'actionnement périodique est alors susceptible d'effectuer dix-huit tours sur l'intervalle de temps maximum pouvant être chronométré ; ce qui dans l'exemple exposé dans le brevet US 6,185,158 conduirait au passage de quatre quantièmes durant le temps chronométré.The method for controlling the analog display device of a chronograph and date hand according to the above-mentioned prior art poses at least one major objective problem. Indeed, this process is essentially limited to a chrono hand displaying the upper unit of time which is counted by the chrono display. Indeed, if we wanted to introduce an hour counter (for example up to three hours) in addition to the 10-minute counter provided ( FIG.1 ), the proposed control method is no longer suitable because said periodic actuating mobile is then capable of performing eighteen laps over the maximum time interval that can be timed; which in the example set out in the patent US 6,185,158 would lead to the passage of four calendar days during the timed time.

Résumé de l'inventionSummary of the invention

La présente invention a pour but de résoudre les problèmes susmentionnés de l'art antérieur cité.The object of the present invention is to solve the abovementioned problems of the cited prior art.

A cet effet, la présente invention a pour objet un procédé de commande d'un dispositif d'affichage analogique équipant un mouvement horloger, le procédé étant défini dans la revendication indépendante 1.To this end, the subject of the present invention is a method for controlling an analog display device fitted to a watch movement, the method being defined in independent claim 1.

Des modes de réalisation préférés sont définis dans les revendications dépendantes.Preferred embodiments are defined in the dependent claims.

Le procédé selon l'invention résout les problèmes de l'art antérieur par l'introduction d'une rotation en sens arrière, de manière périodique, de l'indicateur du paramètre temporel susmentionné lorsque cet indicateur est en marche, c'est-à-dire lorsque la fonction qu'il affiche est activée et donc lorsque le paramètre temporel affiché varie progressivement le long d'une graduation du type circulaire. Ainsi, par exemple, au cours d'une mesure d'un intervalle de temps, l'aiguille chrono associée au moteur multifonctionnel peut effectuer plusieurs marches en arrière successives, à intervalles réguliers et de manière accélérée, de sorte que, quel que soit l'intervalle de temps chronométré, le deuxième indicateur à entraînement périodique reste continument dans une même position donnée.The method according to the invention solves the problems of the prior art by the introduction of a backward rotation, periodically, of the indicator of the above-mentioned time parameter when this indicator is on, that is to say - say when the function it displays is activated and therefore when the displayed time parameter gradually varies along a graduation of the circular type. Thus, for example, during a measurement of a time interval, the chrono hand associated with the multifunctional motor can perform several successive reverses, at regular intervals and in an accelerated manner, so that, whatever the time interval, the second indicator with periodic drive remains continuously in the same given position.

Selon un mode de réalisation particulier, le deuxième affichage est l'affichage de l'unité ou de la dizaine d'une 'grande date', l'affichage de la dizaine, respectivement de l'unité étant réalisé par un troisième indicateur entraîné par un deuxième moteur, lequel entraîne également un quatrième indicateur associé à un quatrième affichage d'un paramètre temporel. Les troisième et quatrième indicateurs sont respectivement commandés comme les deuxième et premier indicateurs selon le procédé de commande de l'invention.According to a particular embodiment, the second display is the display of the unit or the ten of a 'big date', the display of the ten, respectively of the unit, being produced by a third indicator driven by a second motor, which also drives a fourth indicator associated with a fourth display of a time parameter. The third and fourth indicators are respectively controlled like the second and first indicators according to the control method of the invention.

D'autres caractéristiques particulières et applications du procédé de l'invention seront exposées ci-après dans la description détaillée de l'invention.Other particular characteristics and applications of the process of the invention will be set out below in the detailed description of the invention.

Brève description des dessinsBrief description of the drawings

L'invention sera décrite ci-après à l'aide de dessins annexés, donnés à titre d'exemples nullement limitatifs, dans lesquels :

  • La Figure 1 est une vue schématique en plan d'un premier mode de réalisation d'un mouvement horloger sur la base duquel le procédé de commande d'un dispositif d'affichage analogique selon l'invention sera exposé de manière générale ;
  • La Figure 2 est une vue schématique en plan d'un deuxième mode de réalisation d'un mouvement horloger avantageux pour la mise en œuvre du procédé de commande selon l'invention ; et
  • La Figure 3 est une vue schématique en plan d'un quantième perpétuel avec une 'grande date' apparaissant dans un 'grand guichet' où la dizaine et l'unité du quantième sont affichés de manière indépendante par deux indicateurs analogiques associés respectivement à deux moteurs multifonctionnels commandés chacun par un procédé de commande selon l'invention.
The invention will be described below with the aid of appended drawings, given by way of nonlimiting examples, in which:
  • The Figure 1 is a schematic plan view of a first embodiment of a timepiece movement on the basis of which the method of controlling an analog display device according to the invention will be described in general;
  • The Figure 2 is a schematic plan view of a second embodiment of a watch movement advantageous for the implementation of the control method according to the invention; and
  • The Figure 3 is a schematic plan view of a perpetual calendar with a 'big date' appearing in a 'big window' where the ten and the date unit are displayed independently by two analog indicators associated respectively with two multifunctional motors each controlled by a control method according to the invention.

Description détaillée de l'inventionDetailed description of the invention

On décrira ci-après de manière générale le procédé de commande selon l'invention d'un dispositif d'affichage analogique équipant un mouvement horloger 2 en se référant au dessin schématique de la Figure 1.The control method according to the invention of an analog display device equipping a watch movement 2 will be described below in general, with reference to the schematic drawing of the Figure 1 .

Le dispositif d'affichage analogique comprend un premier indicateur 4 associé à un premier affichage d'un premier paramètre temporel, notamment les minutes d'un intervalle de temps chronométré, et un deuxième indicateur 6 associé à un deuxième affichage d'un deuxième paramètre, en particulier le quantième. Les premier et deuxième indicateurs sont respectivement associés à un premier mécanisme d'entraînement, formé par une première chaîne cinématique 10 et 12, et à un deuxième mécanisme d'entraînement formé par une deuxième chaîne cinématique 10, 14 et 22. Selon l'invention, les premier et deuxième mécanismes d'entraînement sont actionnés par un seul et même moteur 16.The analog display device comprises a first indicator 4 associated with a first display of a first time parameter, in particular the minutes of a timed time interval, and a second indicator 6 associated with a second display of a second parameter, in particular the date. The first and second indicators are respectively associated with a first drive mechanism, formed by a first kinematic chain 10 and 12, and with a second drive mechanism formed by a second kinematic chain 10, 14 and 22. According to the invention , the first and second drive mechanisms are actuated by a single motor 16.

Le premier affichage comprend une graduation 18 du type circulaire et le premier mécanisme d'entraînement est agencé de manière à permettre au premier indicateur d'indiquer cycliquement la valeur du premier paramètre temporel en tournant dans un même sens de rotation, ce dernier définissant le sens avant pour le premier indicateur. Le deuxième indicateur est entraîné périodiquement, c'est-à-dire par intermittence, lors de l'actionnement du moteur électromécanique 16. A cet effet, le deuxième mécanisme d'entraînement comprend un mobile d'actionnement périodique 22 pouvant prendre successivement un ensemble de positions indiquées par les divisions 24 et 26 et l'index 28 sur la Figure 1. On notera que ces divisions et cet index ont été ajoutés à la Figure 1 pour les besoins de la description de l'invention. Cependant, le mouvement horloger 2 ne comprend pas une telle graduation et un tel index puisqu'il ne s'agit nullement d'un affichage de ce mouvement horloger. A chaque pas du moteur électromagnétique 16, notamment une rotation de 180° de son rotor, le mobile 22 effectue une petite rotation correspondant à une division. Ce mobile d'actionnement périodique est agencé de manière qu'il entraîne le deuxième indicateur lorsqu'il se trouve dans un premier sous-ensemble de positions 24 dudit ensemble de positions et qu'il est entraîné par le moteur d'une position à l'autre parmi le premier sous-ensemble de positions. Par contre, le deuxième indicateur reste sensiblement immobile lorsque le mobile d'actionnement périodique est entraîné par le moteur 16 d'une position à une autre dans un deuxième sous-ensemble de positions 26 de l'ensemble de positions, ce deuxième sous-ensemble de positions comprenant une pluralité de positions. De plus, les premier et deuxième mécanismes d'entraînement sont agencés de manière que le premier indicateur 4 peut indiquer progressivement au moins un cycle complet du premier paramètre temporel, c'est-à-dire effectuer un tour complet, alors que le mobile d'actionnement périodique reste dans le deuxième sous-ensemble de positions.The first display comprises a graduation 18 of the circular type and the first drive mechanism is arranged so as to allow the first indicator to indicate cyclically the value of the first time parameter by turning in the same direction of rotation, the latter defining the direction before for the first indicator. The second indicator is driven periodically, that is to say intermittently, during the actuation of the electromechanical motor 16. For this purpose, the second drive mechanism comprises a periodic actuation mobile 22 which can successively take a set of positions indicated by divisions 24 and 26 and index 28 on the Figure 1 . Note that these divisions and this index have been added to the Figure 1 for the purposes of describing the invention. However, the watch movement 2 does not include such a graduation and such an index since it is in no way a display of this watch movement. At each step of the electromagnetic motor 16, in particular a 180 ° rotation of its rotor, the mobile 22 performs a small rotation corresponding to a division. This periodic actuator is arranged so that it drives the second indicator when it is in a first subset of positions 24 of said set of positions and when it is driven by the motor from a position to the another among the first subset of positions. On the other hand, the second indicator remains substantially stationary when the mobile for periodic actuation is driven by the motor 16 from one position to another in a second subset of positions 26 of the set of positions, this second subset of positions comprising a plurality of positions. In addition, the first and second drive mechanisms are arranged in such a way that the first indicator 4 can progressively indicate at least one complete cycle of the first time parameter, that is to say perform one complete revolution, while the mobile d periodic actuation remains in the second subset of positions.

Selon l'invention, le procédé de commande du dispositif d'affichage est remarquable par le fait que le moteur 16 est commandé par le mouvement horloger 2 de manière que, lorsque le premier indicateur 4 est dans un mode de marche et qu'il est prévu que le deuxième indicateur 6 reste sensiblement immobile, ce premier indicateur est entraîné en rotation par le moteur alternativement

  • dans un sens avant, pour afficher le premier paramètre temporel, durant une première période au cours de laquelle le mobile d'actionnement périodique 22 est entraîné simultanément dans des positions du deuxième sous-ensemble de positions, et
  • dans un sens arrière, en mode accéléré, durant une deuxième période suivant la première période, avant que le mobile d'actionnement périodique 22 soit entraîné dans une position du premier sous-ensemble de positions ;
l'actionnement du moteur en sens arrière, pour entraîner le premier indicateur dans le sens arrière, étant réalisé de manière que ce premier indicateur affiche correctement le premier paramètre temporel lorsque le moteur est à nouveau commandé dans le sens avant pour une nouvelle première période suivante.According to the invention, the method of controlling the display device is remarkable in that the motor 16 is controlled by the watch movement 2 so that, when the first indicator 4 is in a running mode and it is provided that the second indicator 6 remains substantially stationary, this first indicator is driven in rotation by the motor alternately
  • in a forward direction, to display the first time parameter, during a first period during which the periodic actuator 22 is driven simultaneously in positions of the second subset of positions, and
  • in a reverse direction, in accelerated mode, during a second period following the first period, before the periodic actuating mobile 22 is driven into a position of the first subset of positions;
actuation of the motor in the reverse direction, to drive the first indicator in the rear direction, being carried out so that this first indicator correctly displays the first time parameter when the motor is again controlled in the forward direction for a new first following period .

Selon une variante particulière préférée, la fin de la première période correspond à une position du premier indicateur 4, sur la graduation de type circulaire 18, qui définit la fin d'un cycle et le début d'un cycle suivant, c'est-à-dire sur la Figure 1 à la position '60' confondue à la position '0'.According to a particular preferred variant, the end of the first period corresponds to a position of the first indicator 4, on the circular type graduation 18, which defines the end of a cycle and the start of a following cycle, that is to say to say on the Figure 1 at position '60' combined with position '0'.

Selon une autre variante préférée, le parcours effectué en sens arrière par le premier indicateur durant une deuxième période correspond sensiblement au parcours effectué en sens avant par ce premier indicateur lors de la première période précédant directement cette deuxième période. Dans le cas de la variante précédente, ceci implique que le nombre de tours effectué en marche arrière dans une deuxième période correspond au nombre de tours effectué en marche avant durant la première période précédente.According to another preferred variant, the journey made in the rear direction by the first indicator during a second period corresponds substantially to the journey made in the forward direction by this first indicator during the first period directly preceding this second period. In the case of the previous variant, this implies that the number of turns made in reverse in a second period corresponds to the number of turns made in forward during the first preceding period.

On remarquera que le premier sous-ensemble de positions (index 28 en regard des divisions 24 à la Figure 1) définit une zone d'actionnement (secteur angulaire a) du deuxième indicateur 6 alors que le deuxième sous-ensemble de positions définit une zone de non actionnement (secteur angulaire complémentaire au secteur angulaire a) de ce deuxième indicateur. Lorsqu'il est prévu d'actionner le deuxième indicateur, il est prévu d'entraîner le mobile d'actionnement périodique dans sa zone d'actionnement. De préférence, le deuxième indicateur est incrémenté d'une unité à chaque passage du mobile d'actionnement périodique au travers d'une zone d'actionnement continue, c'est-à-dire non interrompue. De préférence, pour changer l'affichage du deuxième indicateur, il est prévu de faire effectuer simultanément au premier indicateur un nombre entier de tours, de manière à ne pas modifier la position de ce premier indicateur s'il est inactif (sa position finale après l'actionnement du deuxième indicateur est identique à sa position initiale) ou à ne pas induire une erreur dans l'affichage du premier indicateur après le changement de position du deuxième indicateur si ce premier indicateur est actif, c'est-à-dire en fonctionnement.Note that the first subset of positions (index 28 opposite divisions 24 at the Figure 1 ) defines an actuation area (angular sector a) of the second indicator 6 while the second subset of positions defines a non-actuation area (angular sector complementary to the angular sector a) of this second indicator. When it is planned to activate the second indicator, provision is made to drive the periodic actuation mobile in its actuation area. Preferably, the second indicator is incremented by one each time the mobile for periodic actuation is passed. through a continuous actuation zone, that is to say an uninterrupted one. Preferably, to change the display of the second indicator, it is planned to have the first indicator perform a whole number of turns simultaneously, so as not to modify the position of this first indicator if it is inactive (its final position after the actuation of the second indicator is identical to its initial position) or not to induce an error in the display of the first indicator after the position of the second indicator changes if this first indicator is active, i.e. in operation.

Un mode de réalisation préféré d'un mouvement horloger 30 convenant au procédé de commande de l'invention est représenté à la Figure 2. Dans ce mode de réalisation, le premier indicateur 4 est une aiguille de chrono ou une aiguille '24 heures' associée à un cadran secondaire décentré. Le deuxième indicateur 6 est formé par un anneau des quantièmes. Le premier mécanisme associé au premier indicateur est formé par une chaîne cinématique comprenant un pignon 32 du rotor 17 du moteur 16, une roue intermédiaire 33 et une roue de chrono 34 solidaire de l'aiguille de chrono 4. Le deuxième mécanisme associé au deuxième indicateur est formé par une chaîne cinématique comprenant la première chaîne cinématique et en outre un mobile d'actionnement périodique 36 associé à une croix de Malte 40, cette dernière étant solidaire d'un pignon 42 qui engrène avec la denture interne 44 de l'anneau des quantièmes 6. Le mobile 36 comprend un plateau avec une denture externe qui engrène avec un pignon de la roue de chrono. Au-dessus de son plateau, le mobile 36 comprend un noyau central 37 de forme oblongue avec deux extrémités en arc de cercle ainsi que deux goupilles 38 et 39 alignées orthogonalement à l'axe longitudinal du noyau.A preferred embodiment of a watch movement 30 suitable for the control method of the invention is shown in Figure 2 . In this embodiment, the first indicator 4 is a chrono hand or a '24 hour 'hand associated with an off-center secondary dial. The second indicator 6 is formed by a date ring. The first mechanism associated with the first indicator is formed by a kinematic chain comprising a pinion 32 of the rotor 17 of the motor 16, an intermediate wheel 33 and a chrono wheel 34 integral with the chrono hand 4. The second mechanism associated with the second indicator is formed by a kinematic chain comprising the first kinematic chain and in addition a periodic actuating mobile 36 associated with a Maltese cross 40, the latter being integral with a pinion 42 which meshes with the internal toothing 44 of the ring of 6. The mobile 36 comprises a plate with an external toothing which meshes with a pinion of the chrono wheel. Above its plate, the mobile 36 comprises a central core 37 of oblong shape with two ends in an arc of a circle as well as two pins 38 and 39 aligned orthogonally to the longitudinal axis of the core.

La croix de Malte comprend six branches 41 de forme évasée et présentant entre elles des espaces permettant aux goupilles 38 et 39 de pénétrer alternativement entre deux branches pour entraîner périodiquement cette croix de Malte. Le mobile d'actionnement périodique 36 a une zone d'actionnement, formée par deux secteurs angulaires ayant des angles au centre α1 et α2, et une zone de non actionnement formée de deux secteurs angulaires ayant des angles au centre β1 et β2. Les divers secteurs angulaires susmentionnés sont définis à la Figure 2 par deux droites 50 et 52 en trait interrompu. Ces deux droites définissent la zone d'actionnement relativement à une droite de référence 48 passant par les centres du mobile 56 et de la croix de Malte 40. On remarquera que, dans une variante, le mobile 36 peut n'avoir qu'une seule goupille (par exemple la goupille 38) et la zone d'actionnement est alors formée par un seul secteur angulaire d'angle au centre α1. Le secteur complémentaire définit alors la zone de non actionnement. Dans cette variante, le noyau présente un pourtour circulaire substantiellement sur toute la zone de non actionnement. On remarquera que le dispositif à croix de Malte est avantageux par le fait que le noyau central bloque la croix de Malte dans la zone de non actionnement grâce au profil correspondant des branches 41 ; ce qui assure un maintien en position stable de l'anneau des quantièmes en dehors des périodes d'actionnement prévues.The Maltese cross comprises six branches 41 of flared shape and having between them spaces allowing the pins 38 and 39 to penetrate alternately between two branches to entrain periodically this Maltese cross. The periodic actuator 36 has an actuation zone formed by two angular sectors having angles at the center α 1 and α 2 , and a non-actuation zone formed by two angular sectors having angles at the center β 1 and β 2 . The various angular sectors mentioned above are defined in Figure 2 by two straight lines 50 and 52 in broken lines. These two lines define the actuation zone relative to a reference line 48 passing through the centers of the mobile 56 and the Maltese cross 40. It will be noted that, in a variant, the mobile 36 may have only one pin (for example pin 38) and the actuation zone is then formed by a single angular sector with an angle at the center α 1 . The complementary sector then defines the non-actuation zone. In this variant, the core has a circular periphery substantially over the entire non-actuation zone. It will be noted that the Maltese cross device is advantageous in that the central core blocks the Maltese cross in the non-actuation zone thanks to the corresponding profile of the branches 41; which ensures that the date ring is kept in a stable position outside the planned actuation periods.

Le rapport d'engrenage entre la roue chrono 34 et le mobile 36 est tel que la roue chrono peut effectuer plusieurs tours alors que le mobile 56 demeure dans un secteur de sa zone de non actionnement. Ainsi, le procédé de commande selon l'invention peut aisément être mis en œuvre avec le seul et même moteur 16 et les deux indicateurs 4 et 6. On notera que les périodes de rotation en sens arrière de l'indicateur 4 lorsqu'il est en mode actif, pour éviter que le mobile 56 entre dans un des secteurs de sa zone d'actionnement, peuvent être prévues successivement à chaque tour complet de l'indicateur 4 ou seulement après un certain nombre de tours de cet indicateur. Dans chaque cas, on veillera lors de l'initialisation du mouvement horloger que le mobile 36 soit dans une position initiale suffisamment éloignée de la fin d'un secteur de non actionnement pour que le nombre de tours prévu de l'indicateur chrono, avant son retour arrière périodique en mode accéléré, puisse être effectué alors que le mobile 16 demeure dans ce secteur de non actionnement. Ensuite, lors de l'actionnement du quantième, on veillera à amener à la fin de cette fonction le mobile 16 dans une position sensiblement équivalente à la position initiale dans le secteur de non actionnement suivant.The gear ratio between the chrono wheel 34 and the mobile 36 is such that the chrono wheel can make several turns while the mobile 56 remains in a sector of its non-actuation zone. Thus, the control method according to the invention can easily be implemented with the one and the same motor 16 and the two indicators 4 and 6. It will be noted that the periods of rotation in the reverse direction of the indicator 4 when it is in active mode, to prevent the mobile 56 from entering one of the sectors of its actuation zone, can be provided successively at each complete revolution of the indicator 4 or only after a certain number of revolutions of this indicator. In each case, care will be taken during the initialization of the watch movement that the mobile 36 is in an initial position sufficiently distant from the end of a non-actuating sector so that the planned number of revolutions of the chrono indicator, before its periodic backtracking in accelerated mode, can be carried out while the mobile 16 remains in this non-actuating sector. Then, when the date is actuated, care will be taken to bring the mobile 16 at the end of this function to a position substantially equivalent to the initial position in the following non-actuation sector.

A la Figure 3 est représenté schématiquement un mouvement horloger 56 dans lequel le procédé de commande selon l'invention est mis en œuvre pour deux dispositifs d'affichage complémentaires 58 et 60. Ce mouvement comprend une 'grande date', nommé aussi un quantième à 'grand guichet' (schématisé à la Figure 3 par un rectangle 72 en traits interrompus représentant une ouverture de grande dimension dans le cadran d'une montre équipant le mouvement horloger 56). De manière connue, une 'grande date' est généralement formée de deux indicateurs distincts 6A et 6B affichant respectivement l'unité et la dizaine du quantième. Le mouvement horloger 56 comprend également une fonction chronographe avec deux petits compteurs associés respectivement à une première aiguille chrono 4 et une deuxième aiguille chrono 5, définissant notamment un affichage respectivement des minutes et des heures ou demi-heures chronométrées.To the Figure 3 is shown schematically a watch movement 56 in which the control method according to the invention is implemented for two complementary display devices 58 and 60. This movement includes a 'big date', also called a calendar with 'big window' (shown schematically in the Figure 3 by a rectangle 72 in broken lines representing a large opening in the dial of a watch fitted to the watch movement 56). In known manner, a 'big date' is generally formed by two separate indicators 6A and 6B respectively displaying the unit and the tenth of the date. The watch movement 56 also includes a chronograph function with two small counters associated respectively with a first chrono hand 4 and a second chrono hand 5, defining in particular a display respectively of the minutes and of the timed hours or half-hours.

Selon l'invention, l'anneau 6A affichant l'unité du quantième et la première aiguille chrono 4, formant ensemble le premier dispositif d'affichage 58, sont actionnés tous deux par un premier moteur électromécanique 16A, alors que la croix 6B affichant la dizaine du quantième et la deuxième aiguille chrono 5, formant ensemble le deuxième dispositif d'affichage 60, sont actionnés tous deux par un deuxième moteur électromécanique 16B. Le premier dispositif d'affichage comprend une première chaîne cinématique 62 entre le rotor du moteur 16A et l'aiguille chrono 4 et une deuxième chaîne cinématique 63 entre cette aiguille et l'anneau 6A des unités du quantième. Ce premier dispositif d'affichage peut en particulier être agencé de manière similaire à celui décrit à l'aide de la Figure 2 est être commandé par le procédé de commande selon l'invention décrit précédemment. Le deuxième dispositif d'affichage comprend une première chaîne cinématique 64 entre le rotor du moteur 16B et l'aiguille chrono 5 et une deuxième chaîne cinématique 65 entre cette aiguille et la croix 6B des dizaines du quantième. Le mécanisme d'entraînement de la croix incorpore le mécanisme d'entraînement de l'aiguille chrono 5. Dans une variante, ce dernier mécanisme peut être au moins en partie distinct du mécanisme d'entraînement de la croix 6B, comme représenté à la Figure 1.According to the invention, the ring 6A displaying the date unit and the first chrono hand 4, together forming the first display device 58, are both actuated by a first electromechanical motor 16A, while the cross 6B displaying the ten of the date and the second chrono hand 5, together forming the second display device 60, are both actuated by a second electromechanical motor 16B. The first display device comprises a first kinematic chain 62 between the rotor of the motor 16A and the chrono hand 4 and a second kinematic chain 63 between this needle and the ring 6A of the date units. This first display device can in particular be arranged in a similar way to that described using the Figure 2 is to be controlled by the control method according to the invention described above. The second display device comprises a first kinematic chain 64 between the rotor of the motor 16B and the chrono hand 5 and a second kinematic chain 65 between this needle and the cross 6B of the tens of the date. The mechanism for driving the cross incorporates the mechanism for driving the chrono hand 5. In a variant, this latter mechanism can be at least partially distinct from the mechanism for driving the cross 6B, as shown in FIG. Figure 1 .

La chaîne cinématique 65 comprend un mécanisme nommé 'mécanisme de Genève' qui est formé par un mobile d'entraînement périodique 66 et par une petite roue 70 ou un pignon qui est solidaire de la croix 6B et coaxial à cette dernière. Le mobile 66 comprend un profil circulaire sur la majeure partie de son pourtour et un doigt d'actionnement 68 de la petite roue 70. Cette petite roue comprend une denture à huit dents. A chaque tour effectué par le mobile 66, la petite roue avance d'une distance angulaire correspondant à deux dents ; ce qui correspond à une rotation de 90° et donc au passage d'une branche de la croix à la suivante dans le grand guichet 72 du cadran. La denture de la petite roue 70 et le profil du mobile 66 dans la région du doigt 68 sont prévues de manière que la petite roue est bloquée par le mobile 66 lorsque le doigt 68 ne l'entraîne pas, c'est-à-dire lorsque le mobile 66 est dans sa zone de non actionnement. Selon l'invention, la chaîne cinématique 65 est agencée de manière que l'aiguille chrono 5 peut effectuer au moins un tour complet, de préférence plusieurs tours, tant que le mobile 66 reste dans sa zone de non actionnement. Les indicateurs 5 et 6B du deuxième dispositif d'affichage 60 sont respectivement commandés également selon le procédé de commande de l'invention décrit précédemment. D'autres variantes de grande date avec deux anneaux ou avec des disques coaxiaux ou non peuvent être entraînés de manière similaire selon le procédé de l'invention.The kinematic chain 65 comprises a mechanism called the “Geneva mechanism” which is formed by a periodic driving mobile 66 and by a small wheel 70 or a pinion which is integral with the cross 6B and coaxial with the latter. The mobile 66 comprises a circular profile over the major part of its periphery and an actuating finger 68 of the small wheel 70. This small wheel comprises a toothing with eight teeth. At each revolution carried out by the mobile 66, the small wheel advances by an angular distance corresponding to two teeth; which corresponds to a 90 ° rotation and therefore the passage from one branch of the cross to the next in the large window 72 of the dial. The teeth of the small wheel 70 and the profile of the mobile 66 in the region of the finger 68 are provided so that the small wheel is blocked by the mobile 66 when the finger 68 does not drive it, that is to say when the mobile 66 is in its non-actuation zone. According to the invention, the kinematic chain 65 is arranged so that the chrono hand 5 can carry out at least one complete turn, preferably several turns, as long as the mobile 66 remains in its non-actuation zone. The indicators 5 and 6B of the second display device 60 are respectively also controlled according to the control method of the invention described above. Other long-standing variants with two rings or with coaxial or non-coaxial discs can be driven in a similar manner according to the method of the invention.

Claims (7)

  1. Control method for an analogue display device fitted to a timepiece movement (2; 30; 56), said analogue display device including a first indicator (4; 5) associated with a first display for a first time parameter including a circular graduation (18) and a second indicator (6; 6A; 6B) associated with a second display for a second parameter, the first and second indicators being respectively associated with a first drive mechanism and with a second drive mechanism which are actuated by one and the same motor (16; 16A; 16B), the second indicator being periodically driven when said motor is actuated, and the second drive mechanism including a wheel set (22; 36; 66) for periodically actuating said second indicator able successively to take a set of positions, said periodic actuation wheel set being arranged to drive the second indicator when said periodic actuation wheel set is in a first sub-set of positions of said set of positions and to be driven by said motor from one position to the other of the first sub-set of positions, the second indicator remaining substantially immobile when said periodic actuation wheel set is driven by said motor from one position to another in a second sub-set of positions of said set of positions, said second sub-set of positions including a plurality of positions, the first and second drive mechanisms being arranged such that the first indicator can gradually indicate at least one complete cycle of the first time parameter while said wheel set remains in the second sub-set of positions;
    the control method comprising a step according to which said motor is controlled by the timepiece movement such that, when the first indicator is in an operating mode and the second indicator is arranged to remain substantially immobile, the value of the first time parameter is indicated, in a cyclical manner, by way of the first indicator associated with said circular graduation, said first indicator being driven in rotation by said motor alternately:
    - in a forward direction, to display said first time parameter, during a first period in which said periodic actuation wheel set is simultaneously driven in positions of the second sub-set of positions, and
    - in a backward direction, in accelerated mode, during a second period following the first period, before said periodic actuation wheel set is driven in a position of the first sub-set of positions;
    wherein the reverse actuation of the motor, for driving the first indicator in a backward direction, is achieved such that the first indicator correctly displays the first time parameter when the motor is operated in the forward direction again for a following new first period.
  2. Control method according to claim 1, characterized in that the end of the first period corresponds to a position of the first indicator on the circular graduation defining the end of one cycle and the start of a next cycle.
  3. Control method according to claim 1 or 2, characterized in that the backward travel of the first indicator during a said second period substantially corresponds to the forward travel of said first indicator in the first period directly preceding said second period.
  4. Control method according to any of the preceding claims, characterized in that the second mechanism includes a Maltese cross (40) periodically driven by said periodic actuation wheel set (36).
  5. Control method according to any of the preceding claims, characterized in that the first indicator is a hand of a chronograph counter.
  6. Control method according to any of the preceding claims, characterized in that the second display is the date display.
  7. Control method according to any of claims 1 to 5, characterized in that the second display is the display of the units or of the tens of a large date display, the display of the tens, respectively of the units being achieved by a third indicator driven by a second motor, and in that this second motor further drives a fourth indicator associated with a fourth display of a time parameter, the third and fourth indicators being respectively controlled as the second and first indicators according to the control method of any of claims 1 to 5.
EP13197171.5A 2013-12-13 2013-12-13 Method for controlling an analogue display provided on a watch movement Active EP2884349B1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP13197171.5A EP2884349B1 (en) 2013-12-13 2013-12-13 Method for controlling an analogue display provided on a watch movement
US14/562,824 US9389589B2 (en) 2013-12-13 2014-12-08 Control method for an analogue display fitted to a timepiece movement
KR1020140179442A KR101695068B1 (en) 2013-12-13 2014-12-12 Control method for an analogue display fitted to a timepiece movement
JP2014251647A JP6001628B2 (en) 2013-12-13 2014-12-12 Method for controlling an analog display device attached to a timepiece movement
CN201410777801.9A CN104714394B (en) 2013-12-13 2014-12-15 Control method for being attached to the analog display unit of watch and clock movement
HK15108433.1A HK1207910A1 (en) 2013-12-13 2015-08-31 Control method for an analogue display fitted to a timepiece movement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13197171.5A EP2884349B1 (en) 2013-12-13 2013-12-13 Method for controlling an analogue display provided on a watch movement

Publications (2)

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EP2884349A1 EP2884349A1 (en) 2015-06-17
EP2884349B1 true EP2884349B1 (en) 2020-07-01

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EP13197171.5A Active EP2884349B1 (en) 2013-12-13 2013-12-13 Method for controlling an analogue display provided on a watch movement

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US (1) US9389589B2 (en)
EP (1) EP2884349B1 (en)
JP (1) JP6001628B2 (en)
KR (1) KR101695068B1 (en)
CN (1) CN104714394B (en)
HK (1) HK1207910A1 (en)

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EP2927756A1 (en) * 2014-04-03 2015-10-07 ETA SA Manufacture Horlogère Suisse Clock movement provided with a drive mechanism for an analogue indicator with periodic or intermittent movement
EP3173876B1 (en) * 2015-11-26 2020-09-02 Rolex Sa Timepiece calendar system
EP3193217A1 (en) * 2016-01-18 2017-07-19 ETA SA Manufacture Horlogère Suisse Timepiece movement comprising an analog display

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CN1025460C (en) * 1988-06-17 1994-07-13 精工爱普生株式会社 Multifunctional electronic watch
CH681677B5 (en) * 1991-02-05 1993-11-15 Complications Sa The process of initializing perpetual calendar of an analogue quartz chronograph and quartz chronograph for its implementation.
JPH05281370A (en) * 1992-03-31 1993-10-29 Seiko Instr Inc Analog electronic timepiece
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Also Published As

Publication number Publication date
HK1207910A1 (en) 2016-02-12
KR101695068B1 (en) 2017-01-10
JP2015114332A (en) 2015-06-22
EP2884349A1 (en) 2015-06-17
CN104714394A (en) 2015-06-17
KR20150069551A (en) 2015-06-23
US20150168917A1 (en) 2015-06-18
US9389589B2 (en) 2016-07-12
CN104714394B (en) 2017-05-31
JP6001628B2 (en) 2016-10-05

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