EP3985448A1 - Système d'entraînement et de maintien en position d'un mobile d'affichage d'une information horaire ou dérivée du temps - Google Patents

Système d'entraînement et de maintien en position d'un mobile d'affichage d'une information horaire ou dérivée du temps Download PDF

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Publication number
EP3985448A1
EP3985448A1 EP21202503.5A EP21202503A EP3985448A1 EP 3985448 A1 EP3985448 A1 EP 3985448A1 EP 21202503 A EP21202503 A EP 21202503A EP 3985448 A1 EP3985448 A1 EP 3985448A1
Authority
EP
European Patent Office
Prior art keywords
drive
cam
mobile
sub
jumper
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.)
Pending
Application number
EP21202503.5A
Other languages
German (de)
English (en)
French (fr)
Inventor
Christian Fleury
Florent Millet
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rolex SA
Original Assignee
Rolex SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rolex SA filed Critical Rolex SA
Publication of EP3985448A1 publication Critical patent/EP3985448A1/fr
Pending legal-status Critical Current

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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
    • G04B19/25333—Driving or releasing mechanisms wherein the date indicators are driven or released mechanically by a clockwork movement
    • G04B19/25373—Driving or releasing mechanisms wherein the date indicators are driven or released mechanically by a clockwork movement driven or released stepwise by an energy source which is released at determined moments by the clockwork movement
    • 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
    • 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
    • G04B11/00—Click devices; Stop clicks; Clutches
    • G04B11/006—Clutch mechanism between two rotating members with transfer of movement in only one direction (free running devices)
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B19/00—Indicating the time by visual means
    • G04B19/24—Clocks or watches with date or week-day indicators, i.e. calendar clocks or watches; Clockwork calendars
    • G04B19/243—Clocks or watches with date or week-day indicators, i.e. calendar clocks or watches; Clockwork calendars characterised by the shape of the date indicator
    • G04B19/247—Clocks or watches with date or week-day indicators, i.e. calendar clocks or watches; Clockwork calendars characterised by the shape of the date indicator disc-shaped
    • G04B19/253—Driving or releasing mechanisms
    • G04B19/25333—Driving or releasing mechanisms wherein the date indicators are driven or released mechanically by a clockwork movement
    • G04B19/25353—Driving or releasing mechanisms wherein the date indicators are driven or released mechanically by a clockwork movement driven or released stepwise by the clockwork movement
    • G04B19/2536—Driving or releasing mechanisms wherein the date indicators are driven or released mechanically by a clockwork movement driven or released stepwise by the clockwork movement automatically corrected at the end of months having less than 31 days

Definitions

  • the invention relates to a system for driving and maintaining in position a mobile for displaying time or time-derived information.
  • the invention also relates to a timepiece calendar system comprising such a system for driving and maintaining in position.
  • the invention also relates to a movement comprising such a system for driving and maintaining in position or such a horological calendar system.
  • the invention also relates to a timepiece comprising such a movement, such a system for driving and maintaining in position or such a timepiece calendar system.
  • the invention also relates to a method of operating such a timepiece, such a movement, such a drive and position-maintaining system or such a horological calendar system.
  • the document CH525507 discloses a date drive mechanism disarming a jumper of a date disc when instantaneous triggering of the date change.
  • the energy necessary for changing the date is stored in a return spring arranged between a date driving wheel and a date finger.
  • a return spring arranged between a date driving wheel and a date finger.
  • the date finger is retained by the date disc, itself retained by the jumper reinforced by a jumper cam.
  • This jumper cam is kinematically linked to the date driving wheel which makes one revolution in 24 hours.
  • a notch arranged around the perimeter of the jumper cam disarms the jumper.
  • the energy accumulated by the return spring then becomes sufficient for the date finger to overcome the jumper, causing the date disc to be driven on the following date.
  • the document US4240249 describes a calendar system for displaying the date and the day of the week. It comprises a date disc driven by a date finger secured to an energy storage wheel, and a day disc comprising a Maltese cross driven by a pin. The latter is also secured to said storage wheel.
  • the storage wheel is coaxial with a calendar driving wheel making one revolution in 24 hours.
  • a spring arranged between the calendar drive wheel and the storage wheel allows the energy necessary to be stored for the instantaneous passage of the date and day displays.
  • the storage wheel and the calendar driving wheel are both driven by the hour wheel on two separate levels with different transmission ratios.
  • the storage wheel spins slower than the timing drive wheel. The relative speed between the two wheels allows the winding of the return spring.
  • a portion of the toothing is truncated around the periphery of the storage wheel. It allows the rotation of the storage wheel at midnight, independently of the driving wheel, thus generating the restitution of the energy accumulated by the return spring and the instantaneous driving of the displays.
  • the date finger drives the date disc by one step and, simultaneously, the pin drives the Maltese cross, attached to the day disc, also by one step.
  • the Maltese cross also drives the winding of the jumper indexing the date disc.
  • the jumper is disarmed so as to minimize the energy necessary for the date change.
  • the use of a Maltese cross to drive the date jumper is not optimal for the implementation of such a solution in a movement.
  • the document CH591720 also discloses a calendar mechanism for displaying the date and the day of the week. It includes a dragging calendar driver, comprising two coaxial and superposed jumper cams, controlling the winding (or locking) of a jumper simultaneously indexing the date display and the day display.
  • the first jumper cam includes a hollow on its outer profile shaped so as to disarm (or unlock) an elastic part of the jumper when changing the date.
  • the winding (or locking) of the jumper is carried out by the second cam which comprises a finger on its outer profile acting on another rigid part of the jumper to lock it in the teeth of the displays.
  • the jumper is thus completely locked after the date change for several hours, until the elastic part of the jumper cooperates again with the outer profile of the first jumper cam and the other rigid part of the jumper is released by the second jumper cam.
  • This mechanism has the drawback of requiring two cams or at least two cam levels to control the winding and unwinding of the jumper.
  • this mechanism is shaped so as to lock the jumper, namely to completely fix the jumper in a given position, which inevitably generates areas of non-correction if such a calendar mechanism is provided with a correction device comprising a rapid corrector for the date indication and/or the day indication.
  • the object of the invention is to provide a system for driving and maintaining in position a mobile for displaying time or time-derived information, making it possible to improve the known systems of the prior art.
  • the invention proposes a simple and reliable system which makes it possible to limit the energy necessary to carry out the display jumps of the time or time-derived information.
  • a drive and position holding system according to the invention is defined by claim 1.
  • a horological calendar system according to the invention is defined by claim 9.
  • a movement according to the invention is defined by claim 10.
  • a timepiece according to the invention is defined by claim 11.
  • a method of operation according to the invention is defined by claim 12.
  • a first embodiment of a timepiece 120 is described below with reference to the figures 1 to 19 .
  • the timepiece 120 is for example a watch, in particular a wristwatch.
  • the timepiece 120 comprises a timepiece movement 110 intended to be mounted in a timepiece case in order to protect it from the external environment.
  • the watch movement 110 can be an electronic movement or a mechanical movement, in particular an automatic movement.
  • the horological movement 110 comprises a horological system 100, in particular a horological calendar system 100.
  • the calendar system is for example a simple calendar system or an annual calendar system or a semi-perpetual calendar system or a calendar system perpetual.
  • the mobile is a calendar display mobile.
  • the drive device 80 comprises a drive wheel 11 and a unidirectional link 14, 15, 16, 17, 18 linking the drive wheel 11 and the drive cam 13.
  • the intermediate driving wheel set 10 pivots around an axis A1.
  • Drive wheel set 20 pivots around an axis A2 parallel or substantially parallel to axis A1.
  • the elastic return of the drive rocker 30 is provided by the spring 30a.
  • the spring 30a here forms part of the drive rocker 30. Alternatively, it may be two separate parts.
  • Mobile 50 may include a date display disc 50 pivoting about an axis A5 parallel or substantially parallel to axis A1.
  • the drive wheel 11 of the intermediate drive wheel set 10 is constantly driven by an hour wheel of the base movement, not shown in the figures, so as to perform one revolution in 24 hours.
  • This drive wheel 11 drives the first intermediate drive wheel 12 via the unidirectional link device 14. More particularly, as illustrated by the figures 4, 5 and 6 , this unidirectional link device 14 comprises a member ratchet 15 pivoting about a pivot 17 integral with the drive wheel 11.
  • a spring 16 tends to hold one end of the ratchet member 15 towards the outside of the drive wheel 11, so so that it can drive, in a first direction of rotation, a stud 18 or a pin integral with the first intermediate drive wheel 12.
  • the latching member 15 is also shaped so that, in a second direction of rotation, for example when setting the time counter-clockwise, it can be retracted from the stud 18 so as not to drive the first intermediate drive wheel 12.
  • This type of device unidirectional link 14 is disclosed in particular in the document EP2428855 .
  • the first intermediate drive wheel 12 is integral with the instantaneous jump cam 13 which, associated with the drive rocker 30 and its spring 30a, makes it possible to accumulate daily the energy necessary for the instantaneous passage of the date.
  • the instantaneous jump cam 13 is fixed on or mounted in complete connection on the first intermediate drive wheel 12.
  • the instantaneous jump cam 13 can be driven onto the first intermediate drive wheel 12.
  • a roller 31 pivotally mounted on the drive rocker 30 ensures cooperation between the latter and the instantaneous jump cam 13.
  • the roller 31 makes it possible to reduce the friction between the drive rocker 30 and the instantaneous jump cam 13, which allows to thus reduce the energy consumption and the losses of amplitude of the regulating organ of the basic movement.
  • the spring 30a tends to maintain this roller 31 against the instantaneous jump cam 13.
  • the drive rocker 30 comprises two ends intended to be each linked with a pivot connection to a frame of the movement and is shaped so as to be able to accumulate energy in the elastic part of the spring 30a.
  • This rocker conformation advantageously makes it possible to limit the mechanical stresses when the elastic part of the spring is armed while being able to be housed in a given space.
  • Such a spring arrangement 30a is disclosed in particular in the document WO2013102600 .
  • the first intermediate drive wheel 12 drives by its teeth the second intermediate drive wheel 21 of the mobile drive 20.
  • the second intermediate drive wheel 21 is integral with the jumper cam 22 and supports the member of workout 23.
  • the drive member 23 comprises a first member 24, such as a rigid finger, and a second elastic member 25, such as a finger mounted on an elastic support or elastic finger, intended to cooperate with the toothing 50a of the mobile 50.
  • the position holding device 40 makes it possible to index the toothing 50a via the beak 42.
  • the spring 40a is arranged so as to return the beak 42 to the toothing 50a.
  • the respective conformations of the spout 42 and of the toothing 50a, as well as the winding level of the spring 40a, define a determined torque around the axis A5 of the mobile or disc 50. This torque is determined so as to maintain the disc 50 in position, in particular during a shock of a predefined intensity.
  • the higher the winding of the spring 40a, and this independently of the respective conformations of the beak 42 and of the toothing 50a the greater this torque, which directly impacts the energy consumption of the movement and thus the chronometric performance of said movement. .
  • the level of winding of the spring 40a is controlled here by the activation and deactivation device 70 of the device for holding in position 40.
  • the cooperation of the roller 41 with the profile of the jumper cam 22 makes it possible to modulate the winding of the spring 40a as a function in particular of the geometry and the angular position of the external profile of this jumper cam 22.
  • the angular position of the latter is linked to the angular position of the instantaneous jump cam 13, via the device 12, 21 of mechanical coupling.
  • the instantaneous jump cam 13 comprises a winding profile 13a, an instantaneous jump profile 13b, and a stop profile 13c intended to cooperate successively with the roller 31 of the drive rocker 30, as illustrated in the picture 3 .
  • the roller 31 is located on the winding profile 13a.
  • This profile makes it possible to arm the spring 30a so as to accumulate the energy necessary for an instantaneous drive of the mobile 50, for example during a date change.
  • the instantaneous jump cam 13 is linked to the first intermediate drive wheel 12 comprising the stud 18, this assembly being driven, during the winding step, by the drive wheel 11 via the device unidirectional connection 14.
  • the arrangement of such an energy accumulation device associated with the conformation of the winding profile 13a of the instantaneous jump cam 13 makes it possible to minimize and harmonize the energy consumption of the basic movement so as to generating the same or substantially the same loss of amplitude at the level of the regulating member throughout this winding step, or at least during the major part of this winding step.
  • the arrangement of the instantaneous jump cam 13 makes it possible in particular to arm the spring 30a as soon as the latter is driven again after the passage of the date. This allows the distribution of consumption energy over a maximized time slot and to minimize amplitude losses at the level of the regulating organ as much as possible.
  • the jumper cam 22 is kinematically linked to the instantaneous jump cam 13 via the first and second intermediate drive wheels 12, 21.
  • This jumper cam 22 comprises an outer profile 22a, a profile of 22b, an inner profile 22c and a winding profile 22d intended to cooperate successively with the roller 41 arranged at one of the ends of the spring 40a of the jumper 40.
  • the roller 41 makes it possible to reduce the friction in contact with the jumper cam 22.
  • the roller 41 of the jumper 40 is located exclusively on the outer profile 22a.
  • This outer profile 22a is concentric with the axis A2 and is shaped so as to keep the spring 40a armed in order to provide a nominal torque for indexing or keeping the mobile 50 in position.
  • the winding step ends when the roller 31 reaches the end of the winding profile 13a which adjoins the instant jump profile 13b. This end is called the "cam top”.
  • the instant at which the roller reaches the “cam apex” marks the stoppage of the winding step and the start of the instantaneous jump step. It is thus a moment of transition between the arming and instantaneous jump stages.
  • the jumper 40 is disarmed just before driving the mobile 50 and is immediately rearmed before the end of this step, which makes it possible to reduce the energy consumption necessary for the date change, without compromising on mobile indexing 50.
  • the instant jump step comprises several sub-steps or successive steps which are detailed below.
  • the instant jump step firstly comprises a first approach sub-step in which the roller 31 begins to traverse the instant jump profile 13b of the instant jump cam 13 from the "cam vertex".
  • drive member 23 is not yet in contact with toothing 50a of mobile 50.
  • Mobile 50 is thus not yet driven.
  • the jumper 40 is disarmed in order to reduce the torque it produces and, consequently, the energy necessary to driving mobile 50 during a second driving sub-step which will be described later.
  • the roller 41 thus traverses the uncocking profile 22b to reach the level of the inner profile 22c of the jumper cam 22.
  • This inner profile 22c corresponds to the minimum winding level of the jumper 40 This minimum level of winding makes it possible to define a reduced torque for indexing or holding the mobile which is particularly advantageous for the second driving sub-step.
  • the end of the first approach sub-step is illustrated in figures 14 and 15 , and coincides with the instant at which drive member 23 comes into contact with toothing 50a of mobile 50.
  • drive member 23 drives toothing 50a.
  • Training takes place under optimal conditions in terms of energy because jumper 40 has been previously disarmed during the first approach sub-step.
  • the jumper is disarmed until the moment when the beak 42 of the jumper 40 has reached or reached substantially the top of the toothing 50a.
  • This configuration is illustrated in figures 16 and 17 .
  • the roller 41 is here in contact with the inner profile 22c, configuration in which the level of reinforcement of the jumper 40 is the lowest.
  • a third stopping sub-step consists of completing the drive of the toothing 50a and stopping the mobile 50.
  • the beak 42 descends along the toothing 50a, under the effect the restitution of the deformation energy of the spring 40a so as to participate in driving the mobile 50 towards its final position. This minimizes the energy required for driving the latter.
  • the jumper 40 is reset. To do this, the roller 41 traverses the winding profile 22d of the jumper cam 22 to reach the outer profile 22a, thus defining a configuration in which the spring 40a is fully charged, as shown in the figures 18 and 19 .
  • the third stopping sub-step ends when the roller 31 comes into contact with the stopping profile 13c.
  • drive member 23 is still positioned in the path of toothing 50a.
  • the drive member 23 thus acts as a limit stop of the mobile 50 in order to prevent the latter from possibly making an untimely jump due to its inertia and the considerable energy which is released during the instant jump step. Therefore, the positioning torque of the drive wheel 20 induced by the stop profile 13c must be large enough to retain the wheel 50 at the end of the date passage.
  • the drive member 23 is always arranged in the course of the toothing 50a.
  • each 24-hour period includes an arming step and an instant jump step.
  • the instantaneous jump step is itself composed of a first approach sub-step, followed by a second training sub-step itself followed by a third stop sub-step.
  • the instant jump step corresponds to the succession of said first, second and third sub-steps.
  • the chain downstream of the one-way link device 14 is decoupled from the drive wheel 11 during the instantaneous jump step.
  • the drive wheel 11 with its unidirectional connecting device 14 catches up with the stud 18, secured to the first intermediate wheel drive 12 and the instantaneous jump cam 13, in order to be able to start rearming the energy storage device and thus start a new winding step.
  • This catch-up will last for the time that the unidirectional link device 14 travels the angular extent defined by the geometry of the instantaneous jump cam 13, which is shaped so as to allow an adequate led of the mobile 50.
  • the arming step extends here over a significantly longer duration than that corresponding to the instantaneous jump step, the arming step extending over a duration of one or more hours whereas the step of instantaneous jump, in particular all the sub-steps which compose it, extends over a duration of the order of a few fractions of a second.
  • the device for maintaining position 40 can thus be actuated according to different sub-steps by the activation and deactivation device 70.
  • a fourth sub-step of deactivating the device for maintaining position 40 by the device for activation and deactivation 70 is performed during the step of instantaneous jumping of the drive device 80, more particularly during the first sub-step of approach of the drive device 80.
  • a fifth sub-step of activation of the device for maintaining position 40 by the activation and deactivation device 70 is also operated during the step of instantaneous jump of the drive device 80, more particularly during the third sub-step of stopping the device workout 80.
  • a second embodiment of a timepiece 120' is described below with reference to the figures 20 to 27 .
  • the timepiece 120' is for example a watch, in particular a wristwatch.
  • the timepiece 120' comprises a timepiece movement 110' intended to be mounted in a timepiece case in order to protect it from the external environment.
  • the watch movement 110' can be an electronic movement or a mechanical movement, in particular an automatic movement.
  • the horological movement 110' comprises a horological system 100', in particular a horological calendar system 100'.
  • the calendar system is for example a simple calendar system or an annual calendar system or a semi-perpetual calendar system or a perpetual calendar system.
  • the mobile is a calendar display mobile.
  • the second embodiment does not comprise an intermediate drive wheel 10 but a single drive wheel 20' where the jumper cam 22' and the instantaneous jump cam 13' are directly attached, without being connected by first and second intermediate drive wheels 12, 21.
  • all the rest of the system according to the second embodiment operates identically to the first embodiment, whether at the level of the energy accumulation, the driving of the mobile and its indexing.
  • the drive device 80' can comprise a drive wheel 11' and a mechanical link 11a', 18' linking the drive wheel 11' and the drive cam 13' .
  • the mechanical connection 11a', 18' allows play in rotation, according to an angular range corresponding to the angular extent of the oblong cutout 11a', around an axis A2' of rotation of the drive wheel 11' and/or drive cam 13'.
  • Spring 30a' here forms part of drive rocker 30'. Alternatively, it may be two separate parts.
  • the wheel set 50' can comprise a date display disc 50' pivoting about an axis A5' parallel or substantially parallel to the axis A2'.
  • Drive wheel 11' of drive wheel set 20' is constantly driven by an hour wheel of the base movement, not shown in the figures, so as to complete one revolution in 24 hours.
  • This drive wheel 11' does not, on the other hand, comprise a unidirectional connection device as on the intermediate drive wheel set 10 of the first embodiment. Nevertheless, the chain disposed downstream of the drive wheel 11 'still has a degree of freedom in rotation relative to said wheel 11' thanks to the arrangement of the oblong cutout 11a' intended to cooperate with a stud 18' secured to the jumper cam 22', the instantaneous jump cam 13' and the drive member 23'.
  • the oblong cutout 11a' follows a portion of circle coaxial with the axis A2' and allows the stud 18', and the components which are integral with it, to travel at least an angular extent defined by the geometry of the instantaneous jump cam 13 '.
  • This angular extent is defined in such a way as to allow adequate driving of the drive member 23' for the passage of the date. This degree of freedom therefore allows drive member 23' to decouple from drive wheel 11' and from the basic movement during the instantaneous jump step.
  • the drive rocker 30' and the jumper 40' therefore cooperate respectively with the instantaneous jump cam 13' and the jumper cam 22' via their roller, respectively 31' and 41'.
  • the instantaneous jump cam 13' and the jumper cam 22' respectively comprise the same profiles as those of the first embodiment, namely an outer profile 22a', a decocking profile 22b', an inner profile 22c', and a winding profile 22d' for the jumper cam 22', as well as a winding profile 13a', an instantaneous jump profile 13b', and a stop profile 13c' for the instantaneous jump cam 13' .
  • the drive member 23' has the same operation and comprises the same components as that of the first embodiment. More particularly, it comprises a first member 24', like a rigid finger, and a second elastic member 25' for driving the toothing 50a'.
  • drive wheel 11' drives, through the cooperation of oblong cutout 11a' and stud 18', jumper cam 22', instantaneous jump cam 13 ' and the organ drive 23'.
  • the roller 31' of the drive rocker 30' is located during this winding step on the winding profile 13a' of the instantaneous jump cam 13', and the roller 41' of the jumper 40' is on the outer profile 22a' of the jumper cam 22'. Jumper 40' is therefore optimally armed throughout this arming step.
  • the winding step ends when the roller 31' reaches the end of the winding profile 13a' which adjoins the instant jump profile 13b'. This is the moment that marks the end of the arming step and the start of the instantaneous jump step. This position, at the "top of the cam", is illustrated in figures 26 and 27 .
  • the instantaneous jump cam 13' becomes driving and the roller 31' instantaneously traverses the instantaneous jump profile 13b' until reaching the stop profile 13c'. All of the energy necessary for the change of date, stored until then by the energy accumulation device during the winding step, is then restored for the instantaneous drive of the mobile 50 'display of calendar.
  • the drive member 23', the jumper cam 22' and the instantaneous jump cam 13' advance freely and instantaneously thanks to the degree of freedom in rotation conferred on the block 18' within the oblong cutout 11a'.
  • the angular amplitude of this oblong cutout 11a' is here sufficiently large for the drive member 23' to be able to cover the angular extent defined by the geometry of the instantaneous jump cam 13', more particularly defined by the geometry of the profile 13b' of the instantaneous jump cam 13'.
  • the spring 40a' of the jumper 40' is disarmed during the first sub-step of approaching the instantaneous jump step of the drive device 80' to reduce energy consumption. during the second sub-step training device instant jump step 80'. The spring 40a' is then reset during the third sub-step of stopping the drive device 80', so that the spring 40a' is reset at the end of the instantaneous jump step of the drive device 80 '.
  • the stud 18' is overtaken by the oblong cutout 11a' of the drive wheel 11'. This catch-up will last for the time that the oblong cutout 11a' catches up with the angular extent traveled by the drive member 23' necessary for driving the mobile 50'.
  • the system will start a new step of winding and thus start accumulating energy again by winding the spring 30a' of the drive rocker 30' thanks to the winding profile 13a' of the instantaneous jump cam 13'.
  • the device for maintaining position 40' can be actuated according to different sub-steps by the activation and deactivation device 70'.
  • a fourth sub-step of deactivating the holding device 40' in position by the activation and deactivation device 70' is carried out during the instant jump step of the drive device 80', more particularly during the first drive device approach sub-step 80'.
  • a fifth substep of activation of the device for maintaining position 40' by the activation and deactivation device 70' is also carried out during the step of instantaneous jumping of the drive device 80', more particularly during the third sub-step of stopping the driving device 80'.
  • the drive cam 13; 13' and drive rocker 30; 30' are arranged so as to drive, instantaneously, the mobile 50; 50' of display of time or time-derived information.
  • the coupling device comprises a connection securing, according to at least one degree of freedom, the drive cam 13; 13' to deactivation cam 22; 22'.
  • the coupling device advantageously comprises a gear 12, 21 linking the drive cam 13 and the deactivation cam 22.
  • the coupling device advantageously comprises a stud or a pin 18' linking the drive cam 13' and the deactivation cam 22'. This is then a recessed connection or complete connection between the drive cam 13' and the deactivation cam 22'.
  • the system in particular the drive rocker 30; 30', includes a spring 30a; 30a' drive rocker recall.
  • jumper 40; 40' could also be just a simple rigid lever, without a return spring, which would lock and unlock the mobile 50; 50' depending on the position of the deactivation cam 22; 22'.
  • jumper cam 22; 22' and instantaneous jump cam 13; 13' can be directly attached to each other (in particular in complete connection or in recessed connection) as in the second embodiment, or connected kinematically by an intermediate gear train as in the first embodiment. others connecting means could be arranged as a chain of referrals, or a drive finger.
  • the jumper cam 22; 22' could simultaneously control several jumpers for, for example, several mobiles or displays. In particular, it could comprise several distinct levels for controlling these multiple jumpers.
  • the jumper cam 22; 22' can be kinematically linked to other jumper cam(s).
  • a unidirectional link device 14 and an oblong cutout 11a' cooperating with a stud 18' have been arranged in order to be able to decouple the basic movement of the instantaneous jump cam when the latter is driven during the instant jump step.
  • Any other decoupling device making it possible to confer on the system a degree of freedom necessary for the instantaneous jump of a mobile could be arranged here, such as for example a portion of missing teeth on the drive wheel or another freewheel system.
  • a roller 41; 41' is arranged at the end of the spring 40a; 40a' of jumper 40; 40'.
  • the roller makes it possible to limit friction with the jumper cam 22; 22'.
  • this arrangement is not essential. The system could work very well without this roller, by having one of the ends of the spring 40a; 40a' directly resting on jumper cam 22; 22'.
  • the drive member 23; 23' could also be simplified by presenting only a single rigid finger or a single elastic finger to carry out the driving of the mobile 50; 50' and its stoppage.
  • System 90; 90' drive and hold could also be used in any other calendar system and/or in any other system requiring instantaneous switching of a function or display with indexing and/or holding of this function or this display.
  • System 90; 90' for driving and holding in position described could also be transposed to a display system comprising another date display member such as, for example, a needle display.
  • the date display system could comprise several date display members, as is the case for example in a “big date” type system.
  • a mode of performing a method of operating system 90; 90' for driving and holding in position as described previously and/or of the watch calendar system 100; 100' as previously described and/or movement 110; 110' as previously described and/or a timepiece 120; 120' as previously described is described below.
  • the method makes it possible to drive the mobile 50; 50' while the device for holding in position 40; 40' is disabled. It also makes it possible to reactivate the device for maintaining position 40; 40' during the same step of instantaneous jumping of mobile 50; 50'.
  • the figure 28 illustrates a preferred embodiment of a method of operating system 90; 90'. More specifically, the figure 28 illustrates a timing diagram comprising an abscissa axis representing the time t, and an ordinate axis representing the respective states of the device for maintaining position 40; 40' and of the mobile driving device 50; 50'.
  • the ordinates 0 and 1 correspond respectively to the deactivated and activated state of the device for maintaining position 40; 40', and respectively when stopping and driving mobile 50; 50'.
  • the time interval over which the method extends is represented by ti which lies between the abscissas t1 and t6 which correspond respectively to the start and the end of the instantaneous jump step of the drive device 80, 80' .
  • the figure 29 illustrates, in the same way as the figure 28 , the different states of the position holding device 40; 40' during two second driving sub-steps of the driving device 80; 80' of a mobile display 50; 50' which follow one another.
  • This scenario could, for example, illustrate a change of date at the end of a short month of an annual, semi-perpetual or perpetual calendar system, between the date of the 30th and the 1st of the following month.
  • This figure also makes it possible to highlight the fact that the device for holding in position 40; 40' would advantageously only be deactivated and activated once during the entire time interval corresponding to the two instantaneous jumps, in particular to the two second training sub-steps.
  • the training sub-steps for example to allow three or even four successive date jumps, in particular for the date change from the 28th to the 1st of the following month of a semi-perpetual calendar or perpetual.
  • the position holding device 40; 40' would advantageously only be deactivated and activated once during the entire time interval corresponding to the multiple instantaneous jumps.
  • Such an operating method is thus particularly advantageous in the context of a semi-perpetual or perpetual calendar.
  • the multiple second driving sub-steps can be considered as a single second driving sub-step of several steps of the mobile 50; 50' display of hourly or time-derived information.
  • the figures 30 and 31 illustrate a variation of a watchmaking calendar system 100.
  • the calendar system is an annual calendar system whose operating principle is known from the document EP1596261 .
  • the mobile 50 of display carries a satellite 51 meshing with a planetary mobile 60.
  • the satellite 51 is provided with a satellite pinion 51a of four teeth corresponding to the four months of the year counting 30 days , which meshes with the fixed teeth of the planetary wheel set 60.
  • the gear ratios of the planetary wheel 51 and of the planetary wheel set 60 are chosen so that at the end of each month of 30 days, one of the teeth of the planet wheel pinion 51a is located in the trajectory of an additional finger 24a secured to the jumper cam 22 and the instantaneous jump cam 13 via the coupling device 12, 21 here.
  • the additional finger 24a is angularly offset relative to the first member 24 of the drive member 23.
  • the additional finger 24a which first encounters one of the teeth of the satellite pinion 51a and moves the display mobile 50 by one step, causing it to pass from 30 to 31 then, during the same instantaneous jump step, the first member 24 takes over and drives a tooth of the toothing 50a of the mobile 50 for displaying a second pitch by causing it to pass from 31 to 1.
  • the mobile 50 d the display changes from 30 to 1, thus undergoing two second training sub-steps.
  • the first member 24 and the additional finger 24a are both secured to the instantaneous jump cam 13 via the coupling device 12, 21 here.
  • the first member 24 and the additional finger 24a could be arranged on two separate training mobiles. More broadly, there could be as many drive mobiles integral with the instantaneous jump cam 13 as there are drive members for the display mobile 50.
  • the figures 28 and 29 illustrate unit-step transitions between the different states.
  • these transitions can have, for example, a certain slope and not change state so abruptly.
  • the activation of the holding device in position 40; 40' is executed after an equilibrium point of the holding device has been crossed, in particular after a tooth vertex of the toothing 50a; 50a' of indexing has been crossed by beak 42; 42' of jumper.
  • the instantaneous jump cam advantageously makes it possible to induce a constant and distributed energy consumption throughout the winding step, or at least during the major part of the winding step.
  • the advantage of obtaining reduced energy consumption thanks to the implementation of a jumper cam is therefore combined with the advantage of distributing this energy consumption as well as possible throughout the winding step. This therefore results in optimized energy consumption making it possible to reduce the variations in amplitude at the level of the regulating organ and therefore the negative impact on chronometry.
  • the unidirectional link device is arranged upstream of said cams.
  • this device prevents the user from placing the system in a configuration in which the jumper would be disarmed. It is therefore not possible to put this system in a configuration in which the jumper is disarmed other than during the instantaneous jump or jumps corresponding to the date change.
  • indexing of a mobile means the definition of different stable positions of the mobile. These stable positions are defined by the device for maintaining the mobile in position. These stable positions are separated by a continuum of unstable intermediate positions.
  • the drive device makes it possible to move the mobile from one stable position to another, via a continuum of unstable intermediate positions. Between two stable positions or two indexed positions or two indexing positions, the moving part passes temporarily through a continuum of unstable intermediate positions.
  • the device for activating and deactivating the holding device makes it possible to activate or deactivate the holding device of the mobile.
  • the holding device is activated or active, i.e. to say that it generates a nominal torque for indexing or maintaining the mobile in position.
  • the activation and deactivation device then activates the holding device.
  • the holding device is deactivated or inactive, that is to say that it does not generate any indexing torque or maintaining the mobile in position or preferably it generates a reduced indexing or maintaining torque in the mobile position.
  • the reduced torque is lower than the rated torque.
  • the connection securing, according to at least one degree of freedom, the drive cam 13; 13' and the deactivation cam 22; 22' is permanent.
  • instantaneous is meant a duration of the order of one or more fractions of a second.
  • the method of operation of the system 90 90' for driving and holding in position as described previously and/or of the watch calendar system 100; 100' as previously described and/or movement 110; 110' as previously described and/or a timepiece 120; 120′ as described previously, sub-steps which do not necessarily begin and/or do not necessarily end at the same instants but which at least partially overlap in time are qualified as “simultaneous”.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Unknown Time Intervals (AREA)
  • Electromechanical Clocks (AREA)
  • Transmission Devices (AREA)
EP21202503.5A 2020-10-14 2021-10-13 Système d'entraînement et de maintien en position d'un mobile d'affichage d'une information horaire ou dérivée du temps Pending EP3985448A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20201888 2020-10-14

Publications (1)

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EP3985448A1 true EP3985448A1 (fr) 2022-04-20

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EP21202503.5A Pending EP3985448A1 (fr) 2020-10-14 2021-10-13 Système d'entraînement et de maintien en position d'un mobile d'affichage d'une information horaire ou dérivée du temps

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US (1) US20220113678A1 (zh)
EP (1) EP3985448A1 (zh)
JP (1) JP2022064868A (zh)
CN (1) CN114355748A (zh)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH525507A (fr) 1969-11-03 1971-08-13 Tissot Horlogerie Mécanisme d'entraînement d'un organe indicateur de quantième dans une pièce d'horlogerie
CH591720B5 (zh) 1975-03-18 1977-09-30 Ebauches Sa
US4240249A (en) 1979-03-05 1980-12-23 Kruglov Gennady A Instantaneous calendar device for timepieces
EP1596261A1 (fr) 2004-05-14 2005-11-16 Rolex S.A. Mécanisme de quantième annuel pour mouvement d'horlogerie
EP2428855A1 (fr) 2010-09-08 2012-03-14 Rolex S.A. Pièce d'horlogerie munie d'un dispositif d'affichage de périodes de temps déterminées
WO2013102600A2 (fr) 2011-12-27 2013-07-11 Rolex S.A. Ressort pour mouvement horloger
EP3173877A1 (fr) * 2015-11-26 2017-05-31 Rolex Sa Système de calendrier horloger

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH525507A (fr) 1969-11-03 1971-08-13 Tissot Horlogerie Mécanisme d'entraînement d'un organe indicateur de quantième dans une pièce d'horlogerie
CH591720B5 (zh) 1975-03-18 1977-09-30 Ebauches Sa
US4240249A (en) 1979-03-05 1980-12-23 Kruglov Gennady A Instantaneous calendar device for timepieces
EP1596261A1 (fr) 2004-05-14 2005-11-16 Rolex S.A. Mécanisme de quantième annuel pour mouvement d'horlogerie
EP2428855A1 (fr) 2010-09-08 2012-03-14 Rolex S.A. Pièce d'horlogerie munie d'un dispositif d'affichage de périodes de temps déterminées
WO2013102600A2 (fr) 2011-12-27 2013-07-11 Rolex S.A. Ressort pour mouvement horloger
EP3173877A1 (fr) * 2015-11-26 2017-05-31 Rolex Sa Système de calendrier horloger

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JP2022064868A (ja) 2022-04-26
US20220113678A1 (en) 2022-04-14

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