EP4174586B1 - Timepiece assembly comprising a watch and a system for correcting the time - Google Patents

Timepiece assembly comprising a watch and a system for correcting the time Download PDF

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Publication number
EP4174586B1
EP4174586B1 EP22189339.9A EP22189339A EP4174586B1 EP 4174586 B1 EP4174586 B1 EP 4174586B1 EP 22189339 A EP22189339 A EP 22189339A EP 4174586 B1 EP4174586 B1 EP 4174586B1
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EP
European Patent Office
Prior art keywords
mechanical
correction
magnetic field
watch
frequency
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Application number
EP22189339.9A
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German (de)
French (fr)
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EP4174586A1 (en
Inventor
Jérôme Favre
Jean-Jacques Born
Matthias Imboden
Cédric Nicolas
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.)
Swatch Group Research and Development SA
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Swatch Group Research and Development SA
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Publication date
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Publication of EP4174586A1 publication Critical patent/EP4174586A1/en
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Publication of EP4174586B1 publication Critical patent/EP4174586B1/en
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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C11/00—Synchronisation of independently-driven clocks
    • G04C11/08—Synchronisation of independently-driven clocks using an electro-magnet or-motor for oscillation correction
    • G04C11/081—Synchronisation of independently-driven clocks using an electro-magnet or-motor for oscillation correction using an electro-magnet
    • G04C11/084—Synchronisation of independently-driven clocks using an electro-magnet or-motor for oscillation correction using an electro-magnet acting on the balance
    • G—PHYSICS
    • G04—HOROLOGY
    • G04D—APPARATUS OR TOOLS SPECIALLY DESIGNED FOR MAKING OR MAINTAINING CLOCKS OR WATCHES
    • G04D7/00—Measuring, counting, calibrating, testing or regulating apparatus
    • G04D7/12—Timing devices for clocks or watches for comparing the rate of the oscillating member with a standard
    • G04D7/1257—Timing devices for clocks or watches for comparing the rate of the oscillating member with a standard wherein further adjustment devices are present
    • G04D7/1271—Timing devices for clocks or watches for comparing the rate of the oscillating member with a standard wherein further adjustment devices are present for the control mechanism only (from outside the clockwork)
    • G04D7/1292—Timing devices for clocks or watches for comparing the rate of the oscillating member with a standard wherein further adjustment devices are present for the control mechanism only (from outside the clockwork) whereby the adjustment device works on the balance wheel
    • 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
    • G04B27/00—Mechanical devices for setting the time indicating means
    • G04B27/007—Mechanical devices for setting the time indicating means otherwise than manually
    • 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
    • G04C3/04—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means wherein movement is regulated by a balance
    • G04C3/06—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means wherein movement is regulated by a balance using electromagnetic coupling between electric power source and balance
    • G—PHYSICS
    • G04—HOROLOGY
    • G04D—APPARATUS OR TOOLS SPECIALLY DESIGNED FOR MAKING OR MAINTAINING CLOCKS OR WATCHES
    • G04D7/00—Measuring, counting, calibrating, testing or regulating apparatus
    • G04D7/004—Optical measuring and testing apparatus
    • G—PHYSICS
    • G04—HOROLOGY
    • G04D—APPARATUS OR TOOLS SPECIALLY DESIGNED FOR MAKING OR MAINTAINING CLOCKS OR WATCHES
    • G04D7/00—Measuring, counting, calibrating, testing or regulating apparatus
    • G04D7/12—Timing devices for clocks or watches for comparing the rate of the oscillating member with a standard
    • G04D7/1257—Timing devices for clocks or watches for comparing the rate of the oscillating member with a standard wherein further adjustment devices are present
    • G04D7/1264—Timing devices for clocks or watches for comparing the rate of the oscillating member with a standard wherein further adjustment devices are present for complete clockworks
    • G—PHYSICS
    • G04—HOROLOGY
    • G04D—APPARATUS OR TOOLS SPECIALLY DESIGNED FOR MAKING OR MAINTAINING CLOCKS OR WATCHES
    • G04D7/00—Measuring, counting, calibrating, testing or regulating apparatus
    • G04D7/12—Timing devices for clocks or watches for comparing the rate of the oscillating member with a standard
    • G04D7/1257—Timing devices for clocks or watches for comparing the rate of the oscillating member with a standard wherein further adjustment devices are present
    • G04D7/1271—Timing devices for clocks or watches for comparing the rate of the oscillating member with a standard wherein further adjustment devices are present for the control mechanism only (from outside the clockwork)

Definitions

  • the invention relates to a watch, incorporating a mechanical movement provided with a mechanical oscillator, and a system for correcting the time displayed by the watch other than a mechanical control member, in particular a crown stem, operable by a user .
  • the document WO2021/121711 describes a timepiece equipped with a mechanical movement and incorporating a device for correcting the time which is displayed by the timepiece.
  • the correction device is of the electronic type and comprises an electronic unit for receiving a correction signal, supplied by a device external to the timepiece (in particular a mobile telephone), an electromechanical actuator forming a braking device for the resonator mechanism incorporated in the mechanical movement, and an electronic unit for controlling the electromechanical actuator as a function of the correction signal received, this electronic unit being arranged in the timepiece.
  • the correction device incorporated in the timepiece nevertheless includes electronic elements.
  • the known device of the document CH 714 264 A2 shows a time setting means comprising means for driving a stepper motor of an electromechanical watch. This document shows neither movement with a mechanical oscillator, nor a magnetic field generator capable of exciting a mobile magnetic element to generate braking pulses applied to the oscillating mechanical resonator.
  • the present invention aims to provide a watch assembly making it possible to correct the time displayed by a mechanical watch precisely and/or advance/delay the time display by one hour when changing to the current time. summer / winter without a user having to operate a mechanical control member connected to the analog time display.
  • the present invention relates to a watch assembly
  • a watch assembly comprising a watch, formed of a box and a mechanical movement incorporated in the box, and a support which is external to the watch and arranged to be able to support at least the box.
  • this watch in particular a display or a box.
  • the mechanical movement comprises an analog time display, a drive mechanism for this analog time display and a mechanical oscillator, the mechanical resonator of which is formed by a balance wheel and an elastic return structure, this mechanical oscillator being arranged to be able to clock the operation of the drive mechanism.
  • the watch assembly comprises a system for correcting a time displayed by the analog display, this correction system being formed, on the one hand, by a mechanical device incorporated in the box and, on the other hand, by a device electric incorporated in the support.
  • the mechanical device comprises a movable magnetic element, in particular a magnet, which is configured and arranged in the watch in such a way that the mechanical device can brake the oscillating mechanical resonator or momentarily stop an oscillation of the mechanical resonator by exciting the movable magnetic element with a field magnetic, in particular by applying a magnetic force on the magnet by means of a magnetic field produced by the electrical device.
  • the electrical device comprises a magnetic field generator, this magnetic field generator and said box being arranged in such a way that, when the watch case is placed on the external support in a given position, a magnetic field produced by the magnetic field generator can pass through the box and reach the region where the movable magnetic element is located and excite the latter so as to generate, via the mechanical device, braking pulses which are applied to the oscillating mechanical resonator or to momentarily stop an oscillation of the mechanical resonator by the mechanical device.
  • the electrical device further comprises a control unit arranged so as to be able to produce an electrical control signal as a function of a correction determined for the time displayed by the analog display and to supply this electrical control signal to the magnetic field generator so that it generates a corresponding magnetic field which activates the mechanical device so that this mechanical device generates a series of braking pulses which are applied to the oscillating mechanical resonator or momentarily stops an oscillation of the mechanical resonator, so as to substantially effect the determined correction of the displayed time.
  • a control unit arranged so as to be able to produce an electrical control signal as a function of a correction determined for the time displayed by the analog display and to supply this electrical control signal to the magnetic field generator so that it generates a corresponding magnetic field which activates the mechanical device so that this mechanical device generates a series of braking pulses which are applied to the oscillating mechanical resonator or momentarily stops an oscillation of the mechanical resonator, so as to substantially effect the determined correction of the displayed time.
  • the watch assembly it is possible to correct the time displayed by the watch or set the analog display to summer time or winter time, at the planned date, precisely, taking care to place the watch case, in a given position, on the support associated with the watch.
  • the correct time setting can be triggered automatically by closing a cover on the support or by pressing an actuation button on the support or via any sensor associated with the support or possibly via a mobile phone having an application that allows sending a system activation signal correction to a receiver arranged in the support.
  • the support is advantageously a box, a case or a display connected to the sector, or autonomous with batteries, or even equipped with a solar energy sensor.
  • a major advantage of the invention lies in the fact that no electrical element is necessary in the case of the watch, which can therefore be entirely mechanical, that is to say without an electronic unit or other electrical device, the watch case incorporating a fully mechanical movement and a mechanical device comprising a movable magnetic element, in particular a magnet.
  • the electrical device of the correction system according to the invention is located outside the watch case and is materially independent of the watch, so that the watch can be worn by a user without the electrical device, which remains linked to the support exterior on which the watch can be temporarily placed, in particular during at least part of the night.
  • the watch assembly 2 comprises a watch 4, formed by a box 6 and a mechanical movement 8 incorporated in the box, and an external support formed by a box 22 for this watch.
  • the mechanical movement includes an analog display 10 of the current time, a drive mechanism (not shown in the Figure 2 ) of this analog display and a mechanical oscillator whose mechanical resonator 12 is formed by a balance 14 and an elastic return structure 13 (a hairspring in Fig. 2, but flexible blades or other flexible structures can alternatively be provided), this mechanical oscillator being arranged to be able to clock the operation of the drive mechanism.
  • the watch assembly 2 comprises a correction system 16 for a time displayed by the analog display, this correction system being formed, on the one hand, by a mechanical device 18 incorporated in the box 6 and, on the other hand , by an electrical device 20 incorporated in the support external to the watch.
  • the electrical device 20 comprises a magnetic field generator formed by a coil 28 powered according to an electrical control signal supplied by a control unit 30.
  • the magnetic field generator, in particular the coil 28, and the box 6 are arranged so that, when the watch is placed on the support in a given position ( Figure 1 ), a magnetic field produced by the magnetic field generator can pass through the box, the material of which is selected for this purpose at least in the region of the box crossed by the magnetic field useful for the correction system.
  • the mechanical device 18 comprises a permanent magnet 24 and a flexible blade 26 carrying this permanent magnet in a region of a free end of this flexible blade, which is anchored to the watch movement at its other end (alternatively, the anchoring is provided on a caging circle or on an interior wall of the box 6).
  • the mechanical device 18 is arranged in the watch so that it can, under the action of a magnetic field generated by the electrical device and applied to the permanent magnet 24, periodically brake the oscillating mechanical resonator or momentarily stop an oscillation of this mechanical resonator by exerting a mechanical force/pressure on the balance wheel.
  • the flexible blade 26 is arranged so as to be able to exert a force/pressure against an exterior lateral surface of the balance 14, when the permanent magnet undergoes a radial magnetic force by the action of said magnetic field, and thus generate periodic braking pulses or stop the mechanical resonator 12 during a determined time interval, which depends on the function to be performed.
  • the box 22 has a part 34 against which the case 6 of the watch 4 placed in this box is substantially laterally supported in a given position so that the correction system 16 is effective.
  • the magnetic field generator, formed by the coil 28, and the box 6 are arranged in such a way that the magnetic field produced by this field generator can reach, from one side of the watch, the region where the permanent magnet 24 is located with sufficient intensity to be able to exert a radial magnetic force on this permanent magnet capable of generating, via the flexible blade, braking pulses which are applied to the mechanical resonator oscillating, namely on the outer lateral surface of the balance 14, or to momentarily stop an oscillation of the mechanical resonator under the radial force/pressure exerted by the mechanical device 18 on the mechanical resonator, which generates a force torque on the balance via the friction force (dry friction) between the flexible blade and said outer side surface of the balance.
  • the control unit 30 is arranged so as to be able to produce an electrical control signal as a function of a correction determined for the time displayed by the analog display 10 and to supply this electrical control signal to the magnetic field generator 28 for that it generates a corresponding magnetic field which activates the mechanical device 18 so that this mechanical device generates a series of braking pulses applied to the oscillating mechanical resonator or momentarily stops an oscillation of the mechanical resonator, so as to substantially carry out the determined correction of the displayed time.
  • the box 22 can be supplied with electricity via a cable 36 or via contactless power supply means.
  • the model shown includes a digital display 38 allowing for example to give various information, in particular the current date, the time zone or a date of change from winter time to summer time and vice versa.
  • Data entry means can be provided in an area of the box.
  • the reading of various data recorded in an electronic part of the box (for example in the control unit 30) and also the transmission of data to this electronic part is provided via a wireless communication unit arranged in the box and allowing communication with a mobile phone having an application for this purpose.
  • the box 22 comprises an electronic device for determining a correction to be made for the time displayed by the watch, that is to say by the analog display 10.
  • This electronic device comprises a photographic device 40 comprising a photographic sensor formed from a matrix of photodetectors. Then, the electronic device comprises an image processing unit which is arranged to be able to determine the position of at least one determined needle of the analog display 10 in an image taken by the photographic device 40. Finally, the electronic device comprises or is connected to a time base capable of providing a precise current time and it further includes a comparison unit to determine the correction to be made.
  • a mobile phone equipped with an appropriate application is provided to take a photo of the analog display of the watch 4, then to process the image as indicated above, and finally determine a correction for the time displayed.
  • This mobile phone then sends to the electronic unit of the box, via a wireless communication unit, a correction signal indicating the correction to be made and possibly a time to start said correction or a time interval until the start of this correction .
  • the box 22A with the exception of the arrangement of the electrical device 16A of the correction system, is similar to that of the first embodiment described previously, and will not be described in more detail below.
  • the watch assembly 42 is mainly distinguished from the first embodiment by the arrangement of the correction system 16A with a mechanical device 18A arranged so that its permanent magnet 24A is mobile, under the action of an axial magnetic force, substantially in a direction parallel to the central axis of the watch 4A, this central axis being perpendicular to the dial of the analog display and to the general plane of the bottom 48 of the box 6 (this bottom having been removed from the Figures 3 and 4 to show the 8A mechanical movement inside the box).
  • the mechanical device 18A is formed by an elastic structure comprising a flexible blade 26A folded on itself and anchored, at its first end, to a casing circle 44 surrounding the mechanical movement 8A.
  • the flexible blade carries, at its second end which is free, a disk, on which the permanent magnet 24A is stuck, and a finger 46 connected to the disk.
  • THE finger 46 is arranged so as to be heard radially under the rim of the balance 14, at a short distance from this rim.
  • the elasticity of the flexible blade 26A is designed to ensure a certain stability of the magnet 24A and the finger 46 in the absence of a magnetic field for actuating this magnet and also good dynamic behavior of the mechanical device 18A during the generation of an axial magnetic field 52 by the electrical device 20A, this axial magnetic field making it possible to generate braking pulses by dry friction between the finger 46 and a circular upper surface of the balance wheel against which the finger briefly presses, which then applies pressure 54 to said upper circular surface.
  • the finger thus forms a braking pad for the balance wheel.
  • FIG. 5A shows the correction system 42 with the inactive magnetic field generator and the elastic blade 26A, carrying the permanent magnet 24A, in its rest position; while Figure 5B shows the correction system with the magnetic field generator (coil 28) generating a magnetic field 52 for actuating the mechanical device 18A and the elastic blade 26A carrying the permanent magnet 24A in its braking position of the balance 14.
  • the electrical device 20A is arranged in the support 22A and the mechanical device 18A is arranged in the watch 4A.
  • the axial magnetic field 52 passes through the bottom 48 of the box 6 and propagates in the region of the permanent magnet 24A, on which it acts in magnetic attraction.
  • the bottom material 48, at least in the region superimposed on the coil 28, is provided in a non-magnetic material or in a material conducting the magnetic field (having high magnetic permeability).
  • the watch of the watch assembly 58 comprises, in the mechanical device 18B of the correction system 16B, a magnetic parking element which is arranged so as to return, over at least a certain distance of movement of the permanent magnet 24A from a rest position of the latter, the permanent magnet towards this rest position in which it does not touch the balance and in which it is normally maintained, in particular by the magnetic parking element, in the absence of the magnetic field produced by the magnetic field generator (coil).
  • the aforementioned magnetic element is either a ferromagnetic positioning element or a positioning magnet 60 as shown in Fig. Figure 6 .
  • This positioning magnet is configured to continuously exert a magnetic force in magnetic attraction on the permanent magnet 24A in its rest position, with an intensity such that the positioning magnet can, at least in the absence of shocks or strong accelerations of the watch, avoid unwanted braking pulses in the absence of the generation of the magnetic field 52 by the electrical device 20A, while ensuring that the magnetic field 52 generated by the coil 28 can easily overcome the force of attraction of the positioning magnet 60 to generate the braking pulses making it possible to carry out a determined correction of the displayed time.
  • the coil 28 and its power supply, managed by the electronic control unit 30, are arranged so that the magnetic field 52 has sufficient intensity.
  • the magnetic field generator is a movable permanent magnet or a fixed magnet associated with a movable magnetic shield, the movable magnet or the movable magnetic shield being arranged in the support so as to be able to be moved by an actuator to which the electrical control signal is supplied, so as to vary the intensity of the magnetic field supplied to said mechanical device as a function of the electrical control signal.
  • the control unit 30 of the electrical device comprises a device generating at least one frequency which is arranged so as to be able to generate a first periodic signal at a frequency F SUP .
  • the control unit is arranged to supply the magnetic field generator, when the determined correction corresponds to a delay in the displayed time which it is planned to correct and when this correction therefore consists of advancing the display by the current time relative to a flow of time given by the undisturbed mechanical oscillator, a first control signal derived from the first periodic signal, during a first correction period, to activate the correction system so that it generates a first series of periodic braking pulses which are applied to the balance of the mechanical resonator by the mechanical device at the frequency F SUP .
  • the duration of the first correction period and therefore the number of periodic braking pulses in said first series are determined by said delay to be corrected.
  • the frequency F SUP is provided and the mechanical device incorporated in the watch is arranged so that the first series of periodic braking pulses at the frequency F SUP can generate, during the first correction period, a first synchronous phase in which the oscillation of the mechanical resonator is synchronized to a correction frequency FS Cor which is greater than a set frequency F0c provided for the mechanical oscillator. The progress of the mechanical movement is thus accelerated during the first correction period.
  • the correction system is entirely incorporated into the watch.
  • the watch includes a sensor to itself detect a temporal drift in the operation of the mechanical oscillator and therefore of the watch movement.
  • Teaching relating to the generation of the diverse above-mentioned signals and periodic braking pulses, in the case of a delay to be corrected, is however similar.
  • the device generating at least one frequency is arranged so as to be able to also generate a second periodic signal at a frequency F INF .
  • the control unit is arranged to supply the magnetic field generator, when the determined correction corresponds to an advance in the displayed time which it is planned to correct and when this correction therefore consists of delaying the display of the current time relative to a flow of time given by the undisturbed mechanical oscillator, a second control signal derived from the second periodic signal, during a second correction period, to activate the correction system so that this correction system generates a second series of periodic braking pulses which are applied to the balance wheel by the mechanical device at the frequency F INF .
  • the duration of the second correction period and therefore the number of periodic braking pulses in said second series are determined by said advance to be corrected.
  • the frequency F INF is provided and the mechanical device is arranged so that the second series of periodic braking pulses at the frequency F INF can generate, during the second correction period, a second synchronous phase in which the oscillation of the mechanical resonator is synchronized to a correction frequency Flcor which is lower than the set frequency F0c provided for the mechanical oscillator. The progress of the mechanical movement is thus slowed down during the second correction period.
  • the mechanical device of the correction system is arranged so as to be able to block the mechanical resonator under the action of a field magnetic, generated by the magnetic field generator, which is applied to the mobile magnetic element, so as to momentarily stop an oscillation of this mechanical oscillator during a correction period.
  • the control unit is arranged to be able, when the determined correction corresponds to an advance in the displayed time and the correction to be made therefore consists of delaying the analog display of the current time relative to a passage of time given by the mechanical oscillator not disturbed, supply a third control signal to the magnetic field generator so that it activates the mechanical device so that this mechanical device blocks the oscillation of the mechanical resonator during the correction period which is determined by said advance to be corrected, so as to stop the operation of said drive mechanism during this correction period.
  • the blocking of the mechanical oscillator is carried out by the elastic member 26, respectively 26A pressing continuously on the rim of the balance 14 during the correction period.
  • the magnetic field generator generates a magnetic field continuously during the correction period.
  • the correction system is arranged so as to be able to correct the displayed time by 60 minutes in the space of one night, to make a change to the time of summer or winter time.
  • control unit 30 is associated with an electronic device arranged to determine a correction to be made on a given date or as a function of the current time displayed by the watch.
  • determination of the correction to be made is carried out in a device external to the external support, in particular in a mobile telephone comprising an application for this purpose.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • Electric Clocks (AREA)

Description

Domaine technique de l'inventionTechnical field of the invention

L'invention concerne une montre, incorporant un mouvement mécanique muni d'un oscillateur mécanique, et un système de correction de l'heure affichée par la montre autre qu'un organe de commande mécanique, notamment une tige-couronne, actionnable par un utilisateur.The invention relates to a watch, incorporating a mechanical movement provided with a mechanical oscillator, and a system for correcting the time displayed by the watch other than a mechanical control member, in particular a crown stem, operable by a user .

Arrière-plan technologiqueTechnology background

Le document WO2021/121711 décrit une pièce d'horlogerie munie d'un mouvement mécanique et incorporant un dispositif de correction de l'heure qui est affichée par la pièce d'horlogerie. Le dispositif de correction est du type électronique et comprend une unité électronique de réception d'un signal de correction, fourni par un dispositif extérieur à la pièce d'horlogerie (notamment un téléphone portable), un actuateur électromécanique formant un dispositif de freinage du résonateur mécanique incorporé dans le mouvement mécanique, et une unité électronique de commande de l'actuateur électromécanique en fonction du signal de correction reçu, cette unité électronique étant agencée dans la pièce d'horlogerie.The document WO2021/121711 describes a timepiece equipped with a mechanical movement and incorporating a device for correcting the time which is displayed by the timepiece. The correction device is of the electronic type and comprises an electronic unit for receiving a correction signal, supplied by a device external to the timepiece (in particular a mobile telephone), an electromechanical actuator forming a braking device for the resonator mechanism incorporated in the mechanical movement, and an electronic unit for controlling the electromechanical actuator as a function of the correction signal received, this electronic unit being arranged in the timepiece.

Bien que les divers modes de réalisation de la pièce d'horlogerie divulgués dans le document susmentionné sont très intéressants pour pouvoir corriger aisément et précisément l'heure affichée par la pièce d'horlogerie sans que l'utilisateur doivent prendre connaissance de l'heure courante exacte et mettre lui-même à l'heure correcte l'affichage analogique de cette pièce d'horlogerie par des moyens classiques, par exemple une tige-couronne qu'il doit actionner lui-même, l'invention décrite dans le document WO2021/121711 présente toutefois un inconvénient pour les puristes de la haute horlogerie qui considèrent que les montres doivent être entièrement mécaniques. En effet, même si l'invention décrite dans le document susmentionné permet avantageusement de se passer d'une pile ou autre batterie rechargeable dans la pièce d'horlogerie, puisque l'énergie électrique nécessaire peut être fournie lors de chaque correction prévue à une capacité d'alimentation rechargée à l'aide d'une alimentation extérieure, notamment sans contact, le dispositif de correction incorporé dans la pièce d'horlogerie comprend néanmoins des éléments électroniques. Le dispositif connu du document CH 714 264 A2 montre un moyen de remise à l'heure comprenant un moyen d'entraînement d'un moteur pas à pas d'une montre électromécanique. Ce document ne montre ni mouvement à oscillateur mécanique, ni générateur de champ magnétique pouvant exciter un élément magnétique mobile pour engendrer des impulsions de freinage appliquées au résonateur mécanique oscillant.Although the various embodiments of the timepiece disclosed in the aforementioned document are very interesting for being able to easily and precisely correct the time displayed by the timepiece without the user having to take note of the current time exact and himself set the analog display of this timepiece to the correct time by conventional means, for example a crown stem which he must activate himself, the invention described in the document WO2021/121711 however, presents a disadvantage for fine watchmaking purists who believe that watches must be entirely mechanical. Indeed, even if the invention described in the aforementioned document advantageously makes it possible to do without a battery or other rechargeable battery in the timepiece, since the necessary electrical energy can be supplied during each correction provided at a power supply capacity recharged using an external power supply, in particular without contact, the correction device incorporated in the timepiece nevertheless includes electronic elements. The known device of the document CH 714 264 A2 shows a time setting means comprising means for driving a stepper motor of an electromechanical watch. This document shows neither movement with a mechanical oscillator, nor a magnetic field generator capable of exciting a mobile magnetic element to generate braking pulses applied to the oscillating mechanical resonator.

Résumé de l'inventionSummary of the invention

La présente invention a pour but de fournir un ensemble horloger permettant de corriger l'heure affichée par une montre mécanique de manière précise et/ou avancer / retarder d'une heure l'affichage de l'heure lors du passage à l'heure d'été / d'hiver sans qu'un utilisateur n'ait à actionner un organe de commande mécanique relié à l'affichage analogique de l'heure.The present invention aims to provide a watch assembly making it possible to correct the time displayed by a mechanical watch precisely and/or advance/delay the time display by one hour when changing to the current time. summer / winter without a user having to operate a mechanical control member connected to the analog time display.

A cet effet, la présente invention concerne un ensemble horloger comprenant une montre, formée d'une boîte et d'un mouvement mécanique incorporé dans la boîte, et un support qui est extérieur à la montre et agencé pour pouvoir supporter au moins la boîte de cette montre, notamment un présentoir ou un coffret. Le mouvement mécanique comprend un affichage analogique de l'heure, un mécanisme d'entraînement de cet affichage analogique de l'heure et un oscillateur mécanique, dont le résonateur mécanique est formé par un balancier et une structure élastique de rappel, cet oscillateur mécanique étant agencé pour pouvoir cadencer la marche du mécanisme d'entraînement. L'ensemble horloger comprend un système de correction d'une heure affichée par l'affichage analogique, ce système de correction étant formé, d'une part, par un dispositif mécanique incorporé dans la boîte et, d'autre part, par un dispositif électrique incorporé dans le support.To this end, the present invention relates to a watch assembly comprising a watch, formed of a box and a mechanical movement incorporated in the box, and a support which is external to the watch and arranged to be able to support at least the box. this watch, in particular a display or a box. The mechanical movement comprises an analog time display, a drive mechanism for this analog time display and a mechanical oscillator, the mechanical resonator of which is formed by a balance wheel and an elastic return structure, this mechanical oscillator being arranged to be able to clock the operation of the drive mechanism. The watch assembly comprises a system for correcting a time displayed by the analog display, this correction system being formed, on the one hand, by a mechanical device incorporated in the box and, on the other hand, by a device electric incorporated in the support.

Le dispositif mécanique comprend un élément magnétique mobile, notamment un aimant, lequel est configuré et agencé dans la montre de manière que le dispositif mécanique peut freiner le résonateur mécanique oscillant ou stopper momentanément une oscillation du résonateur mécanique en excitant l'élément magnétique mobile par un champ magnétique, notamment en appliquant une force magnétique sur l'aimant au moyen d'un champ magnétique produit par le dispositif électrique.The mechanical device comprises a movable magnetic element, in particular a magnet, which is configured and arranged in the watch in such a way that the mechanical device can brake the oscillating mechanical resonator or momentarily stop an oscillation of the mechanical resonator by exciting the movable magnetic element with a field magnetic, in particular by applying a magnetic force on the magnet by means of a magnetic field produced by the electrical device.

Le dispositif électrique comprend un générateur de champ magnétique, ce générateur de champ magnétique et ladite boîte étant agencés de manière que, lorsque la boîte de montre est placée sur le support extérieur dans une position donnée, un champ magnétique produit par le générateur de champ magnétique peut traverser la boîte et atteindre la région où se trouve l'élément magnétique mobile et exciter ce dernier de manière à engendrer, via le dispositif mécanique, des impulsions de freinage qui sont appliquées au résonateur mécanique oscillant ou à stopper momentanément une oscillation du résonateur mécanique par le dispositif mécanique.The electrical device comprises a magnetic field generator, this magnetic field generator and said box being arranged in such a way that, when the watch case is placed on the external support in a given position, a magnetic field produced by the magnetic field generator can pass through the box and reach the region where the movable magnetic element is located and excite the latter so as to generate, via the mechanical device, braking pulses which are applied to the oscillating mechanical resonator or to momentarily stop an oscillation of the mechanical resonator by the mechanical device.

Le dispositif électrique comprend en outre une unité de commande agencée de manière à pouvoir produire un signal électrique de commande en fonction d'une correction déterminée pour l'heure affichée par l'affichage analogique et fournir ce signal électrique de commande au générateur de champ magnétique pour qu'il engendre un champ magnétique correspondant qui active le dispositif mécanique de manière que ce dispositif mécanique génère une série d'impulsions de freinage qui sont appliquées au résonateur mécanique oscillant ou stoppe momentanément une oscillation du résonateur mécanique, de manière à effectuer sensiblement la correction déterminée de l'heure affichée.The electrical device further comprises a control unit arranged so as to be able to produce an electrical control signal as a function of a correction determined for the time displayed by the analog display and to supply this electrical control signal to the magnetic field generator so that it generates a corresponding magnetic field which activates the mechanical device so that this mechanical device generates a series of braking pulses which are applied to the oscillating mechanical resonator or momentarily stops an oscillation of the mechanical resonator, so as to substantially effect the determined correction of the displayed time.

Grâce aux caractéristiques avantageuses de l'ensemble horloger selon l'invention, il est possible de corriger l'heure affichée par la montre ou mettre l'affichage analogique à l'heure d'été ou à l'heure d'hiver, à la date prévue, de manière précise en prenant soin de poser la boîte de montre, dans une position donnée, sur le support associé à la montre. Le déclenchement de la mise à l'heure correcte peut être réalisé automatiquement par une fermeture d'un couvercle que possède le support ou en pressant sur un bouton d'actionnement que comporte le support ou encore via un capteur quelconque associé au support ou éventuellement via un téléphone mobile ayant une application qui permet d'envoyer un signal d'activation du système de correction à un récepteur agencé dans le support. Le support est avantageusement un coffret, un écrin ou un présentoir relié au secteur, ou autonome avec des batteries, ou encore équipé d'un capteur d'énergie solaire.Thanks to the advantageous characteristics of the watch assembly according to the invention, it is possible to correct the time displayed by the watch or set the analog display to summer time or winter time, at the planned date, precisely, taking care to place the watch case, in a given position, on the support associated with the watch. The correct time setting can be triggered automatically by closing a cover on the support or by pressing an actuation button on the support or via any sensor associated with the support or possibly via a mobile phone having an application that allows sending a system activation signal correction to a receiver arranged in the support. The support is advantageously a box, a case or a display connected to the sector, or autonomous with batteries, or even equipped with a solar energy sensor.

Un avantage majeur de l'invention réside dans le fait qu'aucun élément électrique n'est nécessaire dans la boîte de la montre, laquelle peut donc être entièrement mécanique, c'est-à-dire sans unité électronique ou autre dispositif électrique, la boîte de montre incorporant un mouvement entièrement mécanique et un dispositif mécanique comprenant un élément magnétique mobile, notamment un aimant. Le dispositif électrique du système de correction selon l'invention est situé hors de la boîte de la montre et il est matériellement indépendant de la montre, de sorte que la montre peut être portée par un utilisateur sans le dispositif électrique, lequel demeure lié au support extérieur sur lequel la montre peut être momentanément posée, notamment durant au moins une partie de la nuit.A major advantage of the invention lies in the fact that no electrical element is necessary in the case of the watch, which can therefore be entirely mechanical, that is to say without an electronic unit or other electrical device, the watch case incorporating a fully mechanical movement and a mechanical device comprising a movable magnetic element, in particular a magnet. The electrical device of the correction system according to the invention is located outside the watch case and is materially independent of the watch, so that the watch can be worn by a user without the electrical device, which remains linked to the support exterior on which the watch can be temporarily placed, in particular during at least part of the night.

Brève description des figuresBrief description of the figures

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

  • la Figure 1 montre en perspective un premier d'un mode de réalisation d'un ensemble horloger selon l'invention ;
  • la Figure 2 est une représentation simplifiée et partielle, en coupe horizontale, de l'ensemble horloger de la Figure 1 ;
  • les Figures 3 et 4 montrent en perspective la montre, avec son fond ouvert, d'un deuxième mode de réalisation d'un ensemble horloger selon l'invention, la Figure 4 étant un agrandissement partiel de la Figure 3 ;
  • les Figures 5A et 5B sont des coupes schématiques et partielles au travers du système de correction du deuxième mode de réalisation (Figures 3 et 4), ces coupes transversales montrant le dispositif mécanique, formant le système de correction, respectivement dans une position de repos et dans une position de freinage du balancier du résonateur mécanique incorporé dans le mouvement mécanique ; et
  • la Figure 6 montre une variante perfectionnée du système de correction du deuxième mode de réalisation.
The invention will be described below in more detail using the appended drawings, given by way of non-limiting examples, in which:
  • there Figure 1 shows in perspective a first embodiment of a watch assembly according to the invention;
  • there Figure 2 is a simplified and partial representation, in horizontal section, of the watchmaking assembly of the Figure 1 ;
  • THE Figures 3 and 4 show in perspective the watch, with its open back, of a second embodiment of a watch assembly according to the invention, the Figure 4 being a partial enlargement of the Figure 3 ;
  • THE Figures 5A and 5B are schematic and partial sections through the correction system of the second embodiment ( Figures 3 and 4 ), these cross sections showing the mechanical device, forming the correction system, respectively in a rest position and in a braking position of the balance of the mechanical resonator incorporated in the mechanical movement; And
  • there Figure 6 shows an improved variant of the correction system of the second embodiment.

Description détaillée de l'inventionDetailed description of the invention

En référence aux Figures, on décrira ci-après deux modes de réalisation de l'ensemble horloger selon l'invention.With reference to the Figures, two embodiments of the watch assembly according to the invention will be described below.

Les Figures 1 et 2 concernent un premier mode de réalisation. L'ensemble horloger 2 comprend une montre 4, formée d'une boîte 6 et d'un mouvement mécanique 8 incorporé dans la boîte, et un support extérieur formé par un coffret 22 pour cette montre. Le mouvement mécanique comprend un affichage analogique 10 de l'heure courante, un mécanisme d'entraînement (non représenté à la Figure 2) de cet affichage analogique et un oscillateur mécanique dont le résonateur mécanique 12 est formé par un balancier 14 et une structure élastique de rappel 13 (un spiral à la Figue 2, mais des lames flexibles ou autres structures flexibles peuvent être alternativement prévues), cet oscillateur mécanique étant agencé pour pouvoir cadencer la marche du mécanisme d'entraînement. L'ensemble horloger 2 comprend un système de correction 16 d'une heure affichée par l'affichage analogique, ce système de correction étant formé, d'une part, par un dispositif mécanique 18 incorporé dans la boîte 6 et, d'autre part, par un dispositif électrique 20 incorporé dans le support extérieur à la montre.THE Figures 1 and 2 relate to a first embodiment. The watch assembly 2 comprises a watch 4, formed by a box 6 and a mechanical movement 8 incorporated in the box, and an external support formed by a box 22 for this watch. The mechanical movement includes an analog display 10 of the current time, a drive mechanism (not shown in the Figure 2 ) of this analog display and a mechanical oscillator whose mechanical resonator 12 is formed by a balance 14 and an elastic return structure 13 (a hairspring in Fig. 2, but flexible blades or other flexible structures can alternatively be provided), this mechanical oscillator being arranged to be able to clock the operation of the drive mechanism. The watch assembly 2 comprises a correction system 16 for a time displayed by the analog display, this correction system being formed, on the one hand, by a mechanical device 18 incorporated in the box 6 and, on the other hand , by an electrical device 20 incorporated in the support external to the watch.

Le dispositif électrique 20 comprend un générateur de champ magnétique formé par une bobine 28 alimentée en fonction d'un signal électrique de commande fourni par une unité de commande 30. Le générateur de champ magnétique, en particulier la bobine 28, et la boîte 6 sont agencés de manière que, lorsque la montre est placée sur le support dans une position donnée (Figure 1), un champ magnétique produit par le générateur de champ magnétique peut traverser la boîte, dont le matériau est sélectionné à cet effet au moins dans la région de la boîte traversée par le champ magnétique utile au système de correction.The electrical device 20 comprises a magnetic field generator formed by a coil 28 powered according to an electrical control signal supplied by a control unit 30. The magnetic field generator, in particular the coil 28, and the box 6 are arranged so that, when the watch is placed on the support in a given position ( Figure 1 ), a magnetic field produced by the magnetic field generator can pass through the box, the material of which is selected for this purpose at least in the region of the box crossed by the magnetic field useful for the correction system.

Le dispositif mécanique 18 comprend un aimant permanent 24 et une lame flexible 26 portant cet aimant permanent dans une région d'une extrémité libre de cette lame flexible, laquelle est ancrée au mouvement horloger à son autre extrémité (alternativement, l'ancrage est prévu sur un cercle d'encageage ou sur une paroi intérieure de la boîte 6). Le dispositif mécanique 18 est agencé dans la montre de sorte qu'il peut, sous l'action d'un champ magnétique généré par le dispositif électrique et appliqué à l'aimant permanent 24, freiner périodiquement le résonateur mécanique oscillant ou stopper momentanément une oscillation de ce résonateur mécanique en exerçant une force / pression mécanique sur le balancier. Plus particulièrement, dans le premier mode de réalisation, la lame flexible 26 est agencée de manière à pouvoir venir exercer une force / pression contre une surface latérale extérieure du balancier 14, lorsque l'aimant permanent subit une force magnétique radiale par l'action dudit champ magnétique, et ainsi engendrer les impulsions de freinage périodiques ou stopper le résonateur mécanique 12 durant un intervalle de temps déterminé, lequel dépend de la fonction à réaliser. On remarquera que le coffret 22 présente une partie 34 contre laquelle vient sensiblement en appui latéral la boîte 6 de la montre 4 placée dans ce coffret dans une position donnée pour que le système de correction 16 soit efficace. Le générateur de champ magnétique, formé par la bobine 28, et la boîte 6 sont agencés de manière que le champ magnétique produit par ce générateur de champ peut atteindre, depuis un côté de la montre, la région où est situé l'aimant permanent 24 avec une intensité suffisante pour pouvoir exercer une force magnétique radiale sur cet aimant permanent capable d'engendrer, par l'intermédiaire de la lame flexible, des impulsions de freinage qui sont appliquées au résonateur mécanique oscillant, à savoir sur la surface latérale extérieure du balancier 14, ou à stopper momentanément une oscillation du résonateur mécanique sous la force / pression radiale exercée par le dispositif mécanique 18 sur le résonateur mécanique, laquelle engendre un couple de force sur le balancier via la force de frottement (frottement sec) entre la lame flexible et ladite surface latérale extérieure du balancier.The mechanical device 18 comprises a permanent magnet 24 and a flexible blade 26 carrying this permanent magnet in a region of a free end of this flexible blade, which is anchored to the watch movement at its other end (alternatively, the anchoring is provided on a caging circle or on an interior wall of the box 6). The mechanical device 18 is arranged in the watch so that it can, under the action of a magnetic field generated by the electrical device and applied to the permanent magnet 24, periodically brake the oscillating mechanical resonator or momentarily stop an oscillation of this mechanical resonator by exerting a mechanical force/pressure on the balance wheel. More particularly, in the first embodiment, the flexible blade 26 is arranged so as to be able to exert a force/pressure against an exterior lateral surface of the balance 14, when the permanent magnet undergoes a radial magnetic force by the action of said magnetic field, and thus generate periodic braking pulses or stop the mechanical resonator 12 during a determined time interval, which depends on the function to be performed. It will be noted that the box 22 has a part 34 against which the case 6 of the watch 4 placed in this box is substantially laterally supported in a given position so that the correction system 16 is effective. The magnetic field generator, formed by the coil 28, and the box 6 are arranged in such a way that the magnetic field produced by this field generator can reach, from one side of the watch, the region where the permanent magnet 24 is located with sufficient intensity to be able to exert a radial magnetic force on this permanent magnet capable of generating, via the flexible blade, braking pulses which are applied to the mechanical resonator oscillating, namely on the outer lateral surface of the balance 14, or to momentarily stop an oscillation of the mechanical resonator under the radial force/pressure exerted by the mechanical device 18 on the mechanical resonator, which generates a force torque on the balance via the friction force (dry friction) between the flexible blade and said outer side surface of the balance.

L'unité de commande 30 est agencée de manière à pouvoir produire un signal électrique de commande en fonction d'une correction déterminée pour l'heure affichée par l'affichage analogique 10 et fournir ce signal électrique de commande au générateur de champ magnétique 28 pour qu'il engendre un champ magnétique correspondant qui active le dispositif mécanique 18 de manière que ce dispositif mécanique génère une série d'impulsions de freinage appliquées au résonateur mécanique oscillant ou stoppe momentanément une oscillation du résonateur mécanique, de manière à effectuer sensiblement la correction déterminée de l'heure affichée. Le coffret 22 peut être alimenté en électricité via un câble 36 ou via des moyens d'alimentation sans contact. Le modèle représenté comprend un affichage digital 38 permettant par exemple de donner diverses informations, en particulier la date actuelle, le fuseau horaire ou une date de passage de l'heure d'hiver à l'heure d'été et inversement. Des moyens d'introduction de données peuvent être prévus dans une zone du coffret. Dans une variante avantageuse, la lecture de diverses données enregistrées dans une partie électronique du coffret (par exemple dans l'unité de commande 30) et également la transmission de données à cette partie électronique est prévue via une unité de communication sans fil agencée dans le coffret et permettant de communiquer avec un téléphone portable ayant une application à cet effet.The control unit 30 is arranged so as to be able to produce an electrical control signal as a function of a correction determined for the time displayed by the analog display 10 and to supply this electrical control signal to the magnetic field generator 28 for that it generates a corresponding magnetic field which activates the mechanical device 18 so that this mechanical device generates a series of braking pulses applied to the oscillating mechanical resonator or momentarily stops an oscillation of the mechanical resonator, so as to substantially carry out the determined correction of the displayed time. The box 22 can be supplied with electricity via a cable 36 or via contactless power supply means. The model shown includes a digital display 38 allowing for example to give various information, in particular the current date, the time zone or a date of change from winter time to summer time and vice versa. Data entry means can be provided in an area of the box. In an advantageous variant, the reading of various data recorded in an electronic part of the box (for example in the control unit 30) and also the transmission of data to this electronic part is provided via a wireless communication unit arranged in the box and allowing communication with a mobile phone having an application for this purpose.

Dans le premier mode de réalisation, le coffret 22 comprend un dispositif électronique pour déterminer une correction à effectuer pour l'heure affichée par la montre, c'est-à-dire par l'affichage analogique 10. Ce dispositif électronique comporte un dispositif photographique 40 comprenant un capteur photographique formé d'une matrice de photo-détecteurs. Ensuite, le dispositif électronique comprend une unité de traitement d'images qui est agencée pour pouvoir déterminer la position d'au moins une aiguille déterminée de l'affichage analogique 10 dans une image prise par le dispositif photographique 40. Finalement, le dispositif électronique comprend ou est relié à une base de temps capable de fournir une heure courante précise et il comprend en outre une unité de comparaison pour déterminer la correction à effectuer. Dans une variante de réalisation, un téléphone portable muni d'une application appropriée est prévu pour prendre une photo de l'affichage analogique de la montre 4, puis pour traiter l'image comme indiqué ci-avant, et finalement déterminer une correction pour l'heure affichée. Ce téléphone portable envoie ensuite à l'unité électronique du coffret, via une unité de communication sans fil, un signal de correction indiquant la correction à effectuer et éventuellement une heure pour débuter ladite correction ou un intervalle de temps jusqu'au début de cette correction.In the first embodiment, the box 22 comprises an electronic device for determining a correction to be made for the time displayed by the watch, that is to say by the analog display 10. This electronic device comprises a photographic device 40 comprising a photographic sensor formed from a matrix of photodetectors. Then, the electronic device comprises an image processing unit which is arranged to be able to determine the position of at least one determined needle of the analog display 10 in an image taken by the photographic device 40. Finally, the electronic device comprises or is connected to a time base capable of providing a precise current time and it further includes a comparison unit to determine the correction to be made. In a variant embodiment, a mobile phone equipped with an appropriate application is provided to take a photo of the analog display of the watch 4, then to process the image as indicated above, and finally determine a correction for the time displayed. This mobile phone then sends to the electronic unit of the box, via a wireless communication unit, a correction signal indicating the correction to be made and possibly a time to start said correction or a time interval until the start of this correction .

Les Figures 3 à 5B concernent un deuxième mode de réalisation. Le coffret 22A, à l'exception de l'agencement du dispositif électrique 16A du système de correction, est similaire à celui du premier mode de réalisation décrit précédemment, et ne sera pas décrit plus en détails par la suite. L'ensemble horloger 42 se distingue principalement du premier mode de réalisation par l'agencement du système de correction 16A avec un dispositif mécanique 18A agencé de manière que son aimant permanent 24A est mobile, sous l'action d'une force magnétique axiale, sensiblement selon une direction parallèle à l'axe central de la montre 4A, cet axe central étant perpendiculaire au cadran de l'affichage analogique et au plan général du fond 48 de la boîte 6 (ce fond ayant été enlevé aux Figures 3 et 4 pour montrer le mouvement mécanique 8A à l'intérieur de la boîte). Plus précisément, le dispositif mécanique 18A est formée par une structure élastique comprenant une lame flexible 26A repliée sur elle-même et ancrée, à sa première extrémité, à un cercle d'encageage 44 entourant le mouvement mécanique 8A. La lame flexible porte, à sa seconde extrémité qui est libre, un disque, sur lequel est collé l'aimant permanent 24A, et un doigt 46 relié au disque. Le doigt 46 est agencé de manière à s'entendre radialement sous la serge du balancier 14, à faible distance de cette serge.THE Figures 3 to 5B relate to a second embodiment. The box 22A, with the exception of the arrangement of the electrical device 16A of the correction system, is similar to that of the first embodiment described previously, and will not be described in more detail below. The watch assembly 42 is mainly distinguished from the first embodiment by the arrangement of the correction system 16A with a mechanical device 18A arranged so that its permanent magnet 24A is mobile, under the action of an axial magnetic force, substantially in a direction parallel to the central axis of the watch 4A, this central axis being perpendicular to the dial of the analog display and to the general plane of the bottom 48 of the box 6 (this bottom having been removed from the Figures 3 and 4 to show the 8A mechanical movement inside the box). More precisely, the mechanical device 18A is formed by an elastic structure comprising a flexible blade 26A folded on itself and anchored, at its first end, to a casing circle 44 surrounding the mechanical movement 8A. The flexible blade carries, at its second end which is free, a disk, on which the permanent magnet 24A is stuck, and a finger 46 connected to the disk. THE finger 46 is arranged so as to be heard radially under the rim of the balance 14, at a short distance from this rim.

L'élasticité de la lame flexible 26A est prévue pour assurer une certaine stabilité de l'aimant 24A et du doigt 46 en l'absence d'un champ magnétique d'actionnement de cet aimant et aussi un bon comportement dynamique du dispositif mécanique 18A lors de la génération d'un champ magnétique axial 52 par le dispositif électrique 20A, ce champ magnétique axial permettant de générer des impulsons de freinage par un frottement sec entre le doigt 46 et une surface supérieure circulaire du balancier contre laquelle vient appuyer courtement le doigt, lequel applique alors une pression 54 sur ladite surface circulaire supérieure. Le doigt forme ainsi un patin de freinage du balancier.The elasticity of the flexible blade 26A is designed to ensure a certain stability of the magnet 24A and the finger 46 in the absence of a magnetic field for actuating this magnet and also good dynamic behavior of the mechanical device 18A during the generation of an axial magnetic field 52 by the electrical device 20A, this axial magnetic field making it possible to generate braking pulses by dry friction between the finger 46 and a circular upper surface of the balance wheel against which the finger briefly presses, which then applies pressure 54 to said upper circular surface. The finger thus forms a braking pad for the balance wheel.

La Figure 5A montre le système de correction 42 avec le générateur de champ magnétique inactif et la lame élastique 26A, portant l'aimant permanent 24A, dans sa position de repos ; alors que la Figure 5B montre le système de correction avec le générateur de champ magnétique (bobine 28) générant un champ magnétique 52 d'actionnement du dispositif mécanique 18A et la lame élastique 26A portant l'aimant permanent 24A dans sa position de freinage du balancier 14. Selon l'invention, le dispositif électrique 20A est agencée dans le support 22A et le dispositif mécanique 18A est agencé dans la montre 4A. Lorsque la montre est placée correctement dans une position donnée sur le support 22A, le champ magnétique axial 52 traverse le fond 48 de la boîte 6 et se propage dans la région de l'aimant permanent 24A, sur lequel il agit en attraction magnétique. Le matériau du fond 48, au moins dans la région superposée à la bobine 28, est prévu dans un matériau non magnétique ou dans un matériau conduisant le champ magnétique (ayant une haute perméabilité magnétique).There Figure 5A shows the correction system 42 with the inactive magnetic field generator and the elastic blade 26A, carrying the permanent magnet 24A, in its rest position; while Figure 5B shows the correction system with the magnetic field generator (coil 28) generating a magnetic field 52 for actuating the mechanical device 18A and the elastic blade 26A carrying the permanent magnet 24A in its braking position of the balance 14. According to invention, the electrical device 20A is arranged in the support 22A and the mechanical device 18A is arranged in the watch 4A. When the watch is placed correctly in a given position on the support 22A, the axial magnetic field 52 passes through the bottom 48 of the box 6 and propagates in the region of the permanent magnet 24A, on which it acts in magnetic attraction. The bottom material 48, at least in the region superimposed on the coil 28, is provided in a non-magnetic material or in a material conducting the magnetic field (having high magnetic permeability).

Dans une variante perfectionnée montrée à la Figure 6 (laquelle peut aussi être prévue dans le premier mode de réalisation), la montre de l'ensemble horloger 58 comprend, dans le dispositif mécanique 18B du système de correction 16B, un élément magnétique de stationnement qui est agencé de manière à rappeler, sur au moins une certaine distance de déplacement de l'aimant permanent 24A depuis une position de repos de ce dernier, l'aimant permanent vers cette position de repos dans laquelle il ne touche pas le balancier et dans laquelle il est normalement maintenu, notamment par l'élément magnétique de stationnement, en l'absence du champ magnétique produit par le générateur de champ magnétique (bobine). L'élément magnétique susmentionné est soit un élément ferromagnétique de positionnement, soit un aimant de positionnement 60 comme représenté à la Figure 6. Cet aimant de positionnement est configuré pour exercer en continu une force magnétique en attraction magnétique sur l'aimant permanent 24A dans sa position de repos, avec une intensité telle que l'aimant de positionnement peut, au moins en l'absence de chocs ou de fortes accélérations de la montre, éviter des impulsions de freinage intempestives en l'absence de la génération du champ magnétique 52 par le dispositif électrique 20A, tout en garantissant que le champ magnétique 52 généré par la bobine 28 puisse vaincre aisément la force d'attraction de l'aimant de positionnement 60 pour engendrer les impulsions de freinage permettant d'effectuer une correction déterminée de l'heure affichée. A cet effet, la bobine 28 et son alimentation, gérée par l'unité électronique de commande 30, sont agencées de manière que le champ magnétique 52 présente une intensité suffisante.In an improved variant shown at Figure 6 (which can also be provided in the first embodiment), the watch of the watch assembly 58 comprises, in the mechanical device 18B of the correction system 16B, a magnetic parking element which is arranged so as to return, over at least a certain distance of movement of the permanent magnet 24A from a rest position of the latter, the permanent magnet towards this rest position in which it does not touch the balance and in which it is normally maintained, in particular by the magnetic parking element, in the absence of the magnetic field produced by the magnetic field generator (coil). The aforementioned magnetic element is either a ferromagnetic positioning element or a positioning magnet 60 as shown in Fig. Figure 6 . This positioning magnet is configured to continuously exert a magnetic force in magnetic attraction on the permanent magnet 24A in its rest position, with an intensity such that the positioning magnet can, at least in the absence of shocks or strong accelerations of the watch, avoid unwanted braking pulses in the absence of the generation of the magnetic field 52 by the electrical device 20A, while ensuring that the magnetic field 52 generated by the coil 28 can easily overcome the force of attraction of the positioning magnet 60 to generate the braking pulses making it possible to carry out a determined correction of the displayed time. For this purpose, the coil 28 and its power supply, managed by the electronic control unit 30, are arranged so that the magnetic field 52 has sufficient intensity.

Dans un autre mode de réalisation non représenté, le générateur de champ magnétique est un aimant permanent mobile ou un aimant fixe associé à un blindage magnétique mobile, l'aimant mobile ou le blindage magnétique mobile étant agencé dans le support de manière à pouvoir être déplacé par un actionneur auquel est fourni le signal électrique de commande, de sorte à varier l'intensité du champ magnétique fourni audit dispositif mécanique en fonction du signal électrique de commande.In another embodiment not shown, the magnetic field generator is a movable permanent magnet or a fixed magnet associated with a movable magnetic shield, the movable magnet or the movable magnetic shield being arranged in the support so as to be able to be moved by an actuator to which the electrical control signal is supplied, so as to vary the intensity of the magnetic field supplied to said mechanical device as a function of the electrical control signal.

On décrira ci-après des modes de fonctionnement du système de correction selon l'invention.Modes of operation of the correction system according to the invention will be described below.

Selon un mode de fonctionnement principal, l'unité de commande 30 du dispositif électrique, incorporé dans le support, comprend un dispositif générateur d'au moins une fréquence qui est agencé de manière à pouvoir générer un premier signal périodique à une fréquence FSUP. Ensuite, l'unité de commande est agencée pour fournir au générateur de champ magnétique, lorsque que la correction déterminée correspond à un retard dans l'heure affichée qu'il est prévu de corriger et que cette correction consiste donc à avancer l'affichage de l'heure courante relativement à un écoulement du temps donné par l'oscillateur mécanique non perturbé, un premier signal de commande dérivé du premier signal périodique, durant une première période de correction, pour activer le système de correction de manière qu'il génère une première série d'impulsions de freinage périodiques qui sont appliquées au balancier du résonateur mécanique par le dispositif mécanique à la fréquence FSUP. La durée de la première période de correction et donc le nombre d'impulsions de freinage périodiques dans ladite première série sont déterminés par ledit retard à corriger. La fréquence FSUP est prévue et le dispositif mécanique incorporé dans la montre est agencé de manière que la première série d'impulsions de freinage périodiques à la fréquence FSUP puisse engendrer, au cours de la première période de correction, une première phase synchrone dans laquelle l'oscillation du résonateur mécanique est synchronisée sur une fréquence de correction FSCor qui est supérieure à une fréquence de consigne F0c prévue pour l'oscillateur mécanique. La marche du mouvement mécanique est ainsi accélérée durant la première période de correction.According to a main mode of operation, the control unit 30 of the electrical device, incorporated in the support, comprises a device generating at least one frequency which is arranged so as to be able to generate a first periodic signal at a frequency F SUP . Then, the control unit is arranged to supply the magnetic field generator, when the determined correction corresponds to a delay in the displayed time which it is planned to correct and when this correction therefore consists of advancing the display by the current time relative to a flow of time given by the undisturbed mechanical oscillator, a first control signal derived from the first periodic signal, during a first correction period, to activate the correction system so that it generates a first series of periodic braking pulses which are applied to the balance of the mechanical resonator by the mechanical device at the frequency F SUP . The duration of the first correction period and therefore the number of periodic braking pulses in said first series are determined by said delay to be corrected. The frequency F SUP is provided and the mechanical device incorporated in the watch is arranged so that the first series of periodic braking pulses at the frequency F SUP can generate, during the first correction period, a first synchronous phase in which the oscillation of the mechanical resonator is synchronized to a correction frequency FS Cor which is greater than a set frequency F0c provided for the mechanical oscillator. The progress of the mechanical movement is thus accelerated during the first correction period.

La personne du métier trouvera des informations techniques complémentaires relatives au mode de fonctionnement principal dans le document WO 2021/121711 , et aussi dans le document EP 3629104 . Dans ces deux documents, contrairement à la présente invention, le système de correction est entièrement incorporé dans la montre. De plus, dans le second document, la montre comprend un capteur pour détecter elle-même une dérive temporelle dans la marche de l'oscillateur mécanique et donc du mouvement horloger. L'enseignement relatif à la génération des divers signaux susmentionnés et des impulsions de freinage périodiques, dans le cas d'un retard à corriger, est toutefois semblable.The skilled person will find additional technical information relating to the main mode of operation in the document WO 2021/121711 , and also in the document EP 3629104 . In these two documents, unlike the present invention, the correction system is entirely incorporated into the watch. Furthermore, in the second document, the watch includes a sensor to itself detect a temporal drift in the operation of the mechanical oscillator and therefore of the watch movement. Teaching relating to the generation of the diverse above-mentioned signals and periodic braking pulses, in the case of a delay to be corrected, is however similar.

Dans un premier mode de fonctionnement particulier, le dispositif générateur d'au moins une fréquence est agencé de manière à pouvoir en outre générer un deuxième signal périodique à une fréquence FINF. Ensuite, l'unité de commande est agencée pour fournir au générateur de champ magnétique, lorsque que la correction déterminée correspond à une avance dans l'heure affichée qu'il est prévu de corriger et que cette correction consiste donc à retarder l'affichage de l'heure courante relativement à un écoulement du temps donné par l'oscillateur mécanique non perturbé, un deuxième signal de commande dérivé du deuxième signal périodique, durant une deuxième période de correction, pour activer le système de correction de manière que ce système de correction génère une deuxième série d'impulsions de freinage périodiques qui sont appliquées au balancier par le dispositif mécanique à la fréquence FINF. La durée de la deuxième période de correction et donc le nombre d'impulsions de freinage périodiques dans ladite deuxième série sont déterminés par ladite avance à corriger. La fréquence FINF est prévue et le dispositif mécanique est agencé de manière que la deuxième série d'impulsions de freinage périodiques à la fréquence FINF puisse engendrer, au cours de la deuxième période de correction, une deuxième phase synchrone dans laquelle l'oscillation du résonateur mécanique est synchronisée sur une fréquence de correction Flcor qui est inférieure à la fréquence de consigne F0c prévue pour l'oscillateur mécanique. La marche du mouvement mécanique est ainsi ralentie durant la deuxième période de correction.In a first particular mode of operation, the device generating at least one frequency is arranged so as to be able to also generate a second periodic signal at a frequency F INF . Then, the control unit is arranged to supply the magnetic field generator, when the determined correction corresponds to an advance in the displayed time which it is planned to correct and when this correction therefore consists of delaying the display of the current time relative to a flow of time given by the undisturbed mechanical oscillator, a second control signal derived from the second periodic signal, during a second correction period, to activate the correction system so that this correction system generates a second series of periodic braking pulses which are applied to the balance wheel by the mechanical device at the frequency F INF . The duration of the second correction period and therefore the number of periodic braking pulses in said second series are determined by said advance to be corrected. The frequency F INF is provided and the mechanical device is arranged so that the second series of periodic braking pulses at the frequency F INF can generate, during the second correction period, a second synchronous phase in which the oscillation of the mechanical resonator is synchronized to a correction frequency Flcor which is lower than the set frequency F0c provided for the mechanical oscillator. The progress of the mechanical movement is thus slowed down during the second correction period.

La personne du métier trouvera des informations techniques complémentaires relatives au premier mode de fonctionnement particulier dans le document WO 2021/121711 , et aussi dans le document EP 3629104 .The person skilled in the art will find additional technical information relating to the first particular mode of operation in the document WO 2021/121711 , and also in the document EP 3629104 .

Selon un deuxième mode de fonctionnement particulier, le dispositif mécanique du système de correction est agencé de manière à pouvoir bloquer le résonateur mécanique sous l'action d'un champ magnétique, généré par le générateur de champ magnétique, qui est appliqué à l'élément magnétique mobile, de sorte à stopper momentanément une oscillation de cet oscillateur mécanique durant une période de correction. L'unité de commande est agencée pour pouvoir, lorsque la correction déterminée correspond à une avance dans l'heure affichée et que la correction à effectuer consiste donc à retarder l'affichage analogique de l'heure courante relativement à un écoulement du temps donné par l'oscillateur mécanique non perturbé, fournir un troisième signal de commande au générateur de champ magnétique pour qu'il active le dispositif mécanique de manière que ce dispositif mécanique bloque l'oscillation du résonateur mécanique durant la période de correction qui est déterminée par ladite avance à corriger, de sorte à stopper la marche dudit mécanisme d'entraînement durant cette période de correction. Dans le cas des systèmes de correction décrits précédemment, le blocage de l'oscillateur mécanique est effectué par l'organe élastique 26, respectivement 26A appuyant continument sur la serge du balancier 14 durant la période de correction. Pour ce faire, le générateur de champ magnétique génère un champ magnétique en continu durant la période de correction.According to a second particular mode of operation, the mechanical device of the correction system is arranged so as to be able to block the mechanical resonator under the action of a field magnetic, generated by the magnetic field generator, which is applied to the mobile magnetic element, so as to momentarily stop an oscillation of this mechanical oscillator during a correction period. The control unit is arranged to be able, when the determined correction corresponds to an advance in the displayed time and the correction to be made therefore consists of delaying the analog display of the current time relative to a passage of time given by the mechanical oscillator not disturbed, supply a third control signal to the magnetic field generator so that it activates the mechanical device so that this mechanical device blocks the oscillation of the mechanical resonator during the correction period which is determined by said advance to be corrected, so as to stop the operation of said drive mechanism during this correction period. In the case of the correction systems described above, the blocking of the mechanical oscillator is carried out by the elastic member 26, respectively 26A pressing continuously on the rim of the balance 14 during the correction period. To do this, the magnetic field generator generates a magnetic field continuously during the correction period.

La personne du métier trouvera aussi des informations techniques complémentaires relatives au deuxième mode de fonctionnement particulier dans le document WO 2021/121711 . Dans une variante avantageuse de l'ensemble horloger selon l'invention, le système de correction est agencé de manière à pouvoir corriger l'heure affichée de 60 minutes en l'espace d'une nuit, pour effectuer un passage à l'heure d'été ou à l'heure d'hiver.The skilled person will also find additional technical information relating to the second particular mode of operation in the document WO 2021/121711 . In an advantageous variant of the watch assembly according to the invention, the correction system is arranged so as to be able to correct the displayed time by 60 minutes in the space of one night, to make a change to the time of summer or winter time.

Dans un mode de réalisation général de l'ensemble horloger selon l'invention, l'unité de commande 30 est associée à un dispositif électronique agencé pour déterminer une correction à effectuer à une date donnée ou en fonction de l'heure courante affichée par la montre. Dans un mode de réalisation spécifique, la détermination de la correction à effectuer est réalisée dans un dispositif externe au support extérieur, en particulier dans un téléphone portable comprenant une application à cet effet.In a general embodiment of the watch assembly according to the invention, the control unit 30 is associated with an electronic device arranged to determine a correction to be made on a given date or as a function of the current time displayed by the watch. In a specific embodiment, the determination of the correction to be made is carried out in a device external to the external support, in particular in a mobile telephone comprising an application for this purpose.

Claims (10)

  1. Timepiece assembly (2; 42; 58) comprising a watch (4;4A), formed by a case (6) and a mechanical movement (8; 8A) incorporated into the case, and a support (22; 22A) which is external to the watch and arranged to be able to support at least the case of this watch, the mechanical movement comprising an analogue time display (10), a drive mechanism for this analogue display and a mechanical oscillator, the mechanical resonator (12) of which is formed by a balance wheel (14) and an elastic return structure (13), this mechanical oscillator being arranged so as to be able to set the running of the drive mechanism, the timepiece assembly comprising a correction system for correcting a time displayed by the analogue display, the correction system (16; 16A; 16B) being formed, on the one hand, by a mechanical device (18; 18A; 18B) incorporated into the case and, on the other hand, by an electrical device (20; 20A) incorporated into the support, the mechanical device comprising a mobile magnetic element (24; 24A) and being arranged in the watch so as to be able to brake the oscillating mechanical resonator or momentarily stop an oscillation of this mechanical resonator by exciting the mobile magnetic element with a magnetic field (52) supplied by a magnetic field generator (28) of the electrical device, this magnetic field generator and the case being arranged in such a way that when the case is placed on the support in a given position the magnetic field produced by the magnetic field generator can pass through the case and reach the region where the mobile magnetic element is located so as to excite this mobile magnetic element in order to generate, via the mechanical device, braking pulses which are applied to the oscillating mechanical resonator or to momentarily stop an oscillation of the mechanical resonator by means of the mechanical device, the electrical device comprising a control unit (30) which is arranged so as to be able to produce an electrical control signal as a function of a correction determined for the time displayed by the analogue display and to supply this electric control signal to the magnetic field generator so that it generates a corresponding magnetic field which activates the mechanical device such that this mechanical device generates a series of braking pulses which are applied to the oscillating mechanical resonator or momentarily stops an oscillation of this mechanical resonator, so as to substantially carry out the determined correction of the displayed time.
  2. Timepiece assembly according to claim 1, characterised in that the magnetic field generator is a coil (28) powered as a function of said electric control signal.
  3. Timepiece assembly according to claim 1, characterised in that the magnetic field generator is a mobile permanent magnet or a fixed magnet associated with a mobile magnetic shield, the mobile magnet or the mobile magnetic shield being arranged so as to be displaceable by an actuator to which said electric control signal is supplied so as to vary the strength of the magnetic field applied to said mechanical device as a function of the electric control signal.
  4. Timepiece assembly according to any of the preceding claims, characterised in that said mobile magnetic element is a permanent magnet (24; 24A), the mechanical device being formed by a flexible blade (26; 26A) supporting the permanent magnet in the region of a free end, this flexible blade being arranged so as to be able to exert pressure against a surface of said balance wheel (14) from the action of said magnetic field (52) and thus generate said braking pulses or momentarily stop the mechanical resonator.
  5. Timepiece assembly (58) according to any of the preceding claims, characterised in that the watch further comprises a magnetic parking element (60) which is arranged to recall the mobile magnetic element (24; 24A), over at least a certain displacement distance of this mobile magnetic element, towards a position of rest in which the mobile magnetic element leaves the mechanical resonator (12) free and in which it is normally held in the absence of said magnetic field (52), which is sufficiently strong to be able to overcome the restoring force of the magnetic parking element and to generate said braking pulses of the oscillating mechanical resonator or momentarily stop an oscillation of the mechanical resonator.
  6. Timepiece assembly according to any of the preceding claims, characterised in that the control unit (30) comprises a device for generating at least one frequency, which is arranged to as to be able to generate a first periodic signal at a frequency FSUP, in that the control unit is arranged to supply to the magnetic field generator (28), when the determined correction corresponds to a delay in the displayed time which it is intended to correct, a first control signal derived from the first periodic signal, during a first correction period, to activate the correction system so that this correction system generates a first series of periodic braking pulses which are applied to the mechanical resonator (12) by the mechanical device at frequency FSUP, the duration of the first correction period and therefore the number of periodic braking pulses in said first series being determined by said delay to be corrected, and in that the frequency FSUP is provided and the mechanical device is arranged such that the first series of periodic braking pulses at frequency FSUP can generate, during the first correction period, a first synchronous phase in which the oscillation of the mechanical resonator is synchronised to a correction frequency FSCor which is higher than a setpoint frequency F0c provided for the mechanical oscillator.
  7. Timepiece assembly according to the preceding claim, characterised in that the device for generating at least one frequency is arranged so as to be able to additionally generate a second periodic signal at a frequency FINF, in that the control unit (30) is arranged to supply to the magnetic field generator (28), when the determined correction corresponds to an advance in the displayed time which it is intended to correct, a second control signal derived from the second periodic signal, during a second correction period, to activate the correction system so that this correction system generates a second series of periodic braking pulses which are applied to the mechanical resonator (12) by the mechanical device at frequency FINF, the duration of the second correction period and therefore the number of periodic braking pulses in the second series being determined by said advance to be corrected, and in that the frequency FINF is provided and the mechanical device is arranged such that the second series of periodic braking pulses at frequency FINF can generate, during the second correction period, a second synchronous phase in which the oscillation of the mechanical resonator is synchronised to a correction frequency FICor which is lower than the setpoint frequency F0c provided for the mechanical oscillator.
  8. Timepiece assembly according to claim 6, characterised in that the mechanical device is arranged so as to be able to also block the mechanical resonator from the action of a magnetic field generated by the magnetic field generator (28), which is applied to said mobile magnetic element, so as to momentarily stop an oscillation of the mechanical resonator during a correction period, and in that the control unit (30) is arranged so as to be able, when the determined correction corresponds to an advance in the displayed time, to provide a third control signal to the magnetic field generator so that it activates the mechanical device so that the latter blocks the oscillation of the mechanical resonator during the correction period which is determined by said advance to be corrected, so as to stop the running of said drive mechanism during this correction period.
  9. Timepiece assembly according to any of the preceding claims, characterised in that said control unit (30) is associated with an electronic device to determine a correction to be made, defining said determined correction, on a given date or as a function of the current time displayed by the watch.
  10. Timepiece assembly according to claim 9, characterised in that said support is a box, a casket, or a display case, in that the support comprises said electronic device for determining a correction to be made, this electronic device comprising or being associated with a photographic device (40) which comprises a photographic sensor formed by a matrix of photodetectors, in that said electronic device comprises an image processing unit which is arranged to be able to determine the position of at least one specified hand of said analogue display (10) in an image taken by the photographic device, and in that said electronic device comprises or is connected to a time base capable of providing an accurate current time and further comprises a comparison unit for determining the correction to be made.
EP22189339.9A 2021-10-29 2022-08-08 Timepiece assembly comprising a watch and a system for correcting the time Active EP4174586B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP21205505 2021-10-29

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EP (1) EP4174586B1 (en)
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Publication number Priority date Publication date Assignee Title
EP3001259A1 (en) * 2014-09-26 2016-03-30 ETA SA Manufacture Horlogère Suisse Device for regulating the operation of a mechanical clock movement
EP3252545B1 (en) * 2016-06-03 2019-10-16 The Swatch Group Research and Development Ltd. Timepiece mechanism with balance wheel inertia adjustment
EP3333641B1 (en) * 2016-12-06 2019-07-10 ETA SA Manufacture Horlogère Suisse Clockwork mechanism for controlling a plurality of displays
EP3339982B1 (en) 2016-12-23 2021-08-25 The Swatch Group Research and Development Ltd Regulation by mechanical breaking of a horological mechanical oscillator
CH714264B1 (en) * 2017-10-23 2023-08-15 Winston Harry Sa Case for electromechanical watch and set comprising it.
EP3537233A1 (en) 2018-03-08 2019-09-11 IAV Engineering SARL Time setting device
CH715091A2 (en) * 2018-06-07 2019-12-30 Swatch Group Res & Dev Ltd Timepiece comprising a mechanical movement, the progress of which is regulated by an electromechanical device.
EP3620867B1 (en) * 2018-09-04 2022-01-05 The Swatch Group Research and Development Ltd Timepiece comprising a mechanical oscillator whose average frequency is synchronised to that of a reference electronic oscillator
EP3629104B1 (en) 2018-09-27 2021-05-12 The Swatch Group Research and Development Ltd Mechanical timepiece comprising an electronic device for regulating the time keeping precision of the timepiece
EP4078298A1 (en) 2019-12-17 2022-10-26 The Swatch Group Research and Development Ltd Timepiece component provided with a mechanical movement and a device for correcting a displayed time
EP3842876A1 (en) * 2019-12-24 2021-06-30 The Swatch Group Research and Development Ltd Timepiece fitted with a mechanical movement and a device for correcting the time displayed

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CN116068872A (en) 2023-05-05
EP4174586A1 (en) 2023-05-03
JP7446375B2 (en) 2024-03-08
JP2023067757A (en) 2023-05-16
US20230132978A1 (en) 2023-05-04

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