EP2264551B1 - Differential gear for a timepiece movement - Google Patents

Differential gear for a timepiece movement Download PDF

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Publication number
EP2264551B1
EP2264551B1 EP09162837.0A EP09162837A EP2264551B1 EP 2264551 B1 EP2264551 B1 EP 2264551B1 EP 09162837 A EP09162837 A EP 09162837A EP 2264551 B1 EP2264551 B1 EP 2264551B1
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EP
European Patent Office
Prior art keywords
differential gear
satellite
central shaft
tube
wheels
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP09162837.0A
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German (de)
French (fr)
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EP2264551A1 (en
Inventor
Huy Van Tran
Ludovic Perez
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.)
Pequignet SA
Original Assignee
Samep Sa - Montres Emile Pequignet
Samep Montres Emile Pequignet SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Samep Sa - Montres Emile Pequignet, Samep Montres Emile Pequignet SA filed Critical Samep Sa - Montres Emile Pequignet
Priority to EP09162837.0A priority Critical patent/EP2264551B1/en
Priority to JP2010128088A priority patent/JP5578500B2/en
Priority to CN2010101992449A priority patent/CN101923313B/en
Priority to US12/817,059 priority patent/US8251574B2/en
Publication of EP2264551A1 publication Critical patent/EP2264551A1/en
Priority to HK11101532.0A priority patent/HK1147568A1/en
Application granted granted Critical
Publication of EP2264551B1 publication Critical patent/EP2264551B1/en
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    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B13/00—Gearwork
    • G04B13/007—Gearwork with differential work
    • G04B13/008—Differentials
    • 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
    • G04B9/00—Supervision of the state of winding, e.g. indicating the amount of winding

Definitions

  • the present invention relates to a differential gear for watch movement comprising a central shaft on which are rotatably mounted first and second wheels, each of which is provided with a toothing arranged to mesh with the toothing of at least one satellite carried by a carrier-satellite , also mounted on the central shaft.
  • the first and second wheels are intended to be engaged with first and second mobiles of the watch movement, the central shaft comprising a toothing intended to be engaged with a third mobile of the watch movement.
  • the present invention relates to a differential gear of this type for controlling a mechanism for displaying the power reserve of a mainspring in a timepiece comprising a cylinder as a motor member.
  • the present invention relates to a watch movement provided with such a differential gear, in particular for controlling a power reserve display mechanism, as well as a timepiece equipped with such a watch movement.
  • This differential gear comprises two large wheels provided, on the one hand, with radial teeth connected kinematically to one end and the other of the mainspring and, on the other hand, toothing teeth arranged to be engaged with a satellite having the shape of a conventional gear.
  • Differential gears of this type are bulky in the sense of their thickness and are therefore little used in wristwatches.
  • a general problem that must be taken into account in the mechanisms of display of the power reserve is the management of the value to be displayed when the mainspring of the barrel is reassembled in full charge, either by an automatic winding mechanism or by manual winding. If reassembly is continued, the barrel generally has a sliding flange to guard against any potential damage, while the power reserve display mechanism includes a stop at one place or another to prevent the display member to turn more.
  • a gear of the differential gear is kinematically connected to the barrel drum which continues to rotate during reassembly, even when the spring has reached full load. It is therefore necessary to provide a system to guard the gears involved in the display of the power reserve of any damage, under these conditions.
  • a main object of the present invention is to propose an alternative to the differential gears known from the prior art, in particular for controlling the power reserve display mechanisms, by proposing a differential gear incorporating a safety against Risks related to the excessive winding of the mainspring, while having a simple and compact structure.
  • the invention also relates to such a differential gear comprising a security against similar risks when it is implemented in a mechanism other than a mechanism for displaying the power reserve.
  • the present invention more particularly relates to a differential gear of the type mentioned above, characterized in that its carrier is made integral in rotation with the central shaft by means of a friction device comprising a tube having a first portion disposed in abutment against the central shaft and at least a second portion disposed in abutment against the planet carrier.
  • the tube may comprise a substantially cylindrical skirt in which at least one first tongue is formed in such a way that it exerts a force having a radial component on the planet carrier, which can be centripetal or centrifugal according to variants of embodiment.
  • the skirt may comprise at least one additional tongue of slightly longer length than the first tongue to define a positioning stop of the tube in relation to a shoulder of the central shaft.
  • the tube may have a base provided with a flange forming an axial retention for one of the wheels.
  • the satellite has a sliding pinion gearing arranged simultaneously in engagement with the teeth of the first and second wheels, being radial.
  • the present invention also relates to a watch movement incorporating a differential gear corresponding to the above characteristics, the movement preferably comprising a barrel housing a mainspring whose one end is kinematically connected to a finishing gear and a second end is kinematically connected to a winding device, the differential gear being arranged to control a mechanism for displaying the power reserve of the mainspring.
  • FIG. 1 is a cutaway perspective view of a differential gear according to a preferred embodiment of the present invention.
  • the figure 2 represents a simplified perspective view of a constituent element of the differential gear of the figure 1 ;
  • the figure 3 represents a simplified sectional view of the element of the figure 2 ;
  • the figure 4 represents a simplified perspective view of a portion of the differential gear of the figure 1 making certain construction details visible, and
  • FIG. 5 is a perspective view of a constituent element of a differential gear according to an alternative embodiment.
  • the figure 1 represents a cutaway perspective view of a differential gear 1 according to a preferred embodiment of the present invention. Specifically, about the front half of the differential gear has been removed to make visible its internal structure.
  • the differential gear 1 comprises a central shaft 2 intended to be mounted on a frame member of a watch movement, the shaft being provided with a pivot at each of its ends 3 and 4.
  • An output gear 5 is cut directly into the mass of the central shaft near one of its ends 3.
  • the pinion could also be formed separately and reported without departing from the scope of the present invention.
  • the pinion is followed by a cylindrical support portion 6, itself followed by a main portion 7 of the shaft, also cylindrical but of smaller diameter and extending to the other end 4 of the shaft .
  • a first input gear 8 of the differential gear, carried by a hub 9, is placed in abutment on the support portion 6, being retained axially by the pinion 5.
  • the hub comprises a base, in which a radial toothing 10 is arranged, the base being surmounted by a barrel 11 on which the first wheel 8 is driven.
  • the length of the support portion 6 is slightly greater than the height of the hub 9.
  • An intermediate tube 12 is then engaged on the main portion 7 of the central shaft 2, covering it substantially to the second end 4 of the latter.
  • the structure of the tube 12 will be described in detail later in connection with the detailed description of the figures 2 and 3 . It already appears from the figure 1 from the cross-sectional view of the tube 12, that the latter has a base 14 provided with an annular rim in the form of a retaining flange 15, followed by a support portion 16 having a thickness of important material, and itself followed by a main portion 17, or skirt, thinner and extending to a shoulder 18 of the central shaft 2, defined by the junction between the support portion 6 of the latter and its main portion 7.
  • a planet carrier 20 is engaged on the main portion 17 of the tube.
  • the planet carrier 20 comprises first and second coaxial rings 21, 22 connected to each other by means of a flange 24. Furthermore, a shaft 25 is carried by the rings, in a direction perpendicular to the direction of the central shaft 2, and carries a satellite 26.
  • the planet carrier 20 also fills the retaining function for a second input wheel 28 of the differential gear, previously engaged on the support portion 16 of the tube.
  • the second input wheel 28 is carried by a hub 29 comprising a base, in which a radial toothing 30 is formed, the base being surmounted by a barrel 31 on which the second wheel 28 is hunted.
  • the hub 29 is, on the one hand, disposed in abutment against the retaining collar 15 while being, on the other hand, retained by the planet carrier 20.
  • the hubs 9, 29 are arranged in opposite directions, so that their teeth are facing one another, so as to cooperate with the satellite 26.
  • one of the wheels is kinematically connected to a first end of the mainspring, either via the barrel drum or the barrel shaft, while the other wheel is kinematically connected to the barrel spring. other end of the mainspring.
  • the changes in the state of charge of the mainspring are taken into account to be transmitted.
  • a mobile display of the power reserve from the output of the differential gear 1, the output gear 5.
  • the figure 2 represents a simplified perspective view of the isolated tube 12 and allows better discerning its structure, especially that of its main portion 17.
  • This latter has a generally cylindrical shape but is constituted, in the present embodiment illustrated by way of non-limiting example, of two pairs of tongues 34, 35, two tongues of the same pair being diametrically opposed with respect to the axis of the tube.
  • the free ends of the tongues all have an extra thickness so that the diameter of the main portion 17 of the tube, at the free ends of the tongues, is similar to the diameter of the opposite end of the main portion 17, that is to say ie that which is connected to the support portion 16.
  • This diameter substantially corresponds to the internal diameter of the ring 21 of the planet carrier 20, as is apparent from FIG. figure 1 .
  • the planet carrier 20 is fitted on the tube 12.
  • the particular structure of the main portion 17 of the tube gives it elastic properties, in particular by deformation of the tongues 35, which allow relative sliding between the tube and the tube. carrier when the torque to be transmitted between these elements exceeds a preset value reached when the mainspring reaches its full load. Below this predefined value, the tabs 35 exert a force having a radial component, centrifugal here, on the planet carrier 20 such that these two elements are integral in rotation.
  • the figure 3 represents a simplified sectional view of the tube 12 of the figure 2 , on which have been schematically different configurations of the tabs 35, to illustrate how their degree of deformation can be adjusted according to the desired force to act on the carrier.
  • the figure 4 represents a simplified perspective view of a portion of the differential gear of the figure 1 making certain construction details visible. Specifically, the first input wheel 8 has been removed to more clearly illustrate the planet carrier 20 and the satellite 26 in accordance with the present preferred embodiment of the present invention.
  • the flange 24 connecting the first and second rings 21, 22 has a plurality of openings 40, in particular to lighten it.
  • arms are used to connect the first and second rings to each other instead of the flange, without departing from the scope of the present invention.
  • the puddle 24 comprises an additional opening 41 in which the satellite 26 is housed, carried by the shaft 25.
  • the satellite 26 has a particular shape, namely that it is similar to that of a sliding pinion, used in the winding mechanisms, in which the conventional Breguet teeth have not been cut.
  • the satellite 26 has a toothing 42 of the sliding pinion type, that is to say a set of teeth oriented in a direction substantially parallel to the axis of rotation of the satellite having a symmetry along this axis.
  • the satellite can mesh with conventional radial gears, which are those carried by the hubs 9 and 29 in the embodiment shown here.
  • the bulk of the differential gear according to the present invention is reduced in the direction of height with respect to a conventional differential gear in which the satellite has the form of a conventional gear with radial teeth.
  • the satellite 26 comprises an annular groove 43 intended here to cooperate with the fingers 44 formed in the flange 24 of the planet carrier 20 to ensure a good positioning of the satellite relative to the planet carrier, and therefore with respect to the first and second input wheels 8 and 28.
  • the figure 5 is a perspective view of a central shaft 60, according to an alternative embodiment, intended to cooperate with a tube as described above.
  • the central shaft 60 has a conical portion 61 intended to cooperate with the ends of the tongues 35, these being thus to be deformed towards the inside and no longer from the outside as was the case in the previous realization.
  • the tube exerts a centripetal force on the central shaft 60 to produce an effect similar to that discussed above.
  • the tube is, in this case, integral in rotation with the planet carrier.
  • the friction force F ensuring the transmission of the rotational movements of the tube to the planet carrier (in the first case) or to the central shaft (in the second case).
  • case as being equal to the product of p by N, where p is the coefficient of friction, depending on the two materials in contact with each other, and N is the radial force exerted by the tube on the carrier or on the central shaft due to the deformation of its tongues 35.
  • the particular structure of the tube allows a relatively accurate adjustment of the value of N, p being known from the moment when the materials concerned were selected.
  • the value of F directly related to the moment of force involved between the two elements in contact, can be adjusted relatively accurately (the moment being equal to the product of F by the radius at the point of application of F, the point contact between the two bodies concerned).
  • the threshold value of the moment of force from which the tube slides relative to the other member involved can be adjusted to be close to the value necessary for the transmission of the moments of force necessary to ensure the proper functioning of the mechanism.
  • corresponding watchmaker which reduces the wear of parts related to friction, compared to known mechanisms of the prior art. Note further that if the tongues 35 are deformed too much in a given direction, they can be brought back in the opposite direction, possibly reversibly depending on the nature of the material used.
  • the carrier is rendered integral in rotation with the central shaft by means of a friction device comprising a tube having a first portion disposed in abutment against the central shaft and at least a second portion disposed in abutment against the planet carrier, without leaving of the present invention which is defined by the appended claims.
  • a friction device comprising a tube having a first portion disposed in abutment against the central shaft and at least a second portion disposed in abutment against the planet carrier, without leaving of the present invention which is defined by the appended claims.
  • the differential gear of the present invention may also be implemented in clock mechanisms other than those intended to display the power reserve.

Description

Domaine techniqueTechnical area

La présente invention concerne un engrenage différentiel pour mouvement horloger comportant un arbre central sur lequel sont montées rotatives des première et seconde roues dont chacune est munie d'une denture agencée pour engrener avec la denture d'au moins un satellite porté par un porte-satellite, également monté sur l'arbre central. Les première et seconde roues sont destinées à être en prise avec des premier et second mobiles du mouvement horloger, l'arbre central comportant une denture destinée à être en prise avec un troisième mobile du mouvement horloger.The present invention relates to a differential gear for watch movement comprising a central shaft on which are rotatably mounted first and second wheels, each of which is provided with a toothing arranged to mesh with the toothing of at least one satellite carried by a carrier-satellite , also mounted on the central shaft. The first and second wheels are intended to be engaged with first and second mobiles of the watch movement, the central shaft comprising a toothing intended to be engaged with a third mobile of the watch movement.

En particulier, la présente invention concerne un engrenage différentiel de ce type destiné à commander un mécanisme d'affichage de la réserve de marche d'un ressort de barillet dans une pièce d'horlogerie comportant un barillet comme organe moteur.In particular, the present invention relates to a differential gear of this type for controlling a mechanism for displaying the power reserve of a mainspring in a timepiece comprising a cylinder as a motor member.

La présente invention concerne un mouvement horloger muni d'un tel engrenage différentiel, notamment pour commander un mécanisme d'affichage de la réserve de marche, ainsi qu'une pièce d'horlogerie munie d'un tel mouvement horloger.The present invention relates to a watch movement provided with such a differential gear, in particular for controlling a power reserve display mechanism, as well as a timepiece equipped with such a watch movement.

Etat de la techniqueState of the art

Des engrenages différentiels de ce type sont déjà couramment utilisés dans des mouvements horlogers à remontage manuel ou automatique.Differential gears of this type are already commonly used in watch movements with manual or automatic winding.

A titre d'exemple, le brevet CH 263 707, publié le 1er décembre 1949 , décrit un engrenage différentiel pour l'affichage de la réserve de marche d'une montre répondant aux caractéristiques énoncées ci-dessus.For example, the patent CH 263 707, published December 1, 1949 , discloses a differential gear for displaying the power reserve of a watch meeting the characteristics set out above.

Cet engrenage différentiel comporte deux grandes roues munies, d'une part, de dentures radiales reliées cinématiquement à une extrémité et l'autre du ressort de barillet et, d'autre part, de dentures en chant agencées pour être en prise avec un satellite présentant la forme d'un pignon conventionnel. Les engrenages différentiels de ce type sont encombrants dans le sens de leur épaisseur et sont donc peu mis en oeuvre dans des montres-bracelets.This differential gear comprises two large wheels provided, on the one hand, with radial teeth connected kinematically to one end and the other of the mainspring and, on the other hand, toothing teeth arranged to be engaged with a satellite having the shape of a conventional gear. Differential gears of this type are bulky in the sense of their thickness and are therefore little used in wristwatches.

Par ailleurs, un problème général dont il faut tenir compte dans les mécanismes d'affichage de la réserve de marche est la gestion de la valeur à afficher lorsque le ressort du barillet est remonté en pleine charge, soit par un mécanisme de remontage automatique, soit par remontage manuel. Si le remontage est poursuivi, le barillet comporte généralement une bride glissante pour le prémunir de tout dommage potentiel, tandis que le mécanisme d'affichage de la réserve de marche comprend une butée à un endroit ou à autre pour empêcher l'organe d'affichage de tourner davantage. Toutefois, une roue de l'engrenage différentiel est reliée cinématiquement au tambour de barillet qui continue de tourner pendant le remontage, même lorsque le ressort a atteint la pleine charge. Il est donc nécessaire de prévoir un système pour prémunir les engrenages impliqués dans l'affichage de la réserve de marche de tout dommage, dans ces conditions.Furthermore, a general problem that must be taken into account in the mechanisms of display of the power reserve is the management of the value to be displayed when the mainspring of the barrel is reassembled in full charge, either by an automatic winding mechanism or by manual winding. If reassembly is continued, the barrel generally has a sliding flange to guard against any potential damage, while the power reserve display mechanism includes a stop at one place or another to prevent the display member to turn more. However, a gear of the differential gear is kinematically connected to the barrel drum which continues to rotate during reassembly, even when the spring has reached full load. It is therefore necessary to provide a system to guard the gears involved in the display of the power reserve of any damage, under these conditions.

Le brevet cité plus haut propose de monter l'une des roues de l'engrenage différentiel à frottement gras sur son arbre pour lui permettre de glisser sur l'arbre lorsque le ressort de barillet a atteint sa pleine charge.The patent cited above proposes to mount one of the wheels of the differential gear friction on its shaft to allow it to slide on the shaft when the mainspring has reached its full load.

On notera qu'une telle mesure permet également de s'affranchir de la nécessité de prévoir un appairage pour le posage de l'organe indicateur de la réserve de marche du fait que sa position peut être ajustée au moyen de la butée mentionnée précédemment.Note that such a measure also eliminates the need to provide a pairing for the setting of the power reserve indicator member because its position can be adjusted by means of the abutment mentioned above.

La demande de brevet EP 1 139 182 A1 , publiée le 4 octobre 2001 propose un engrenage différentiel alternatif, mettant en oeuvre des engrenages de type conique, moins encombrants que ceux décrits plus haut. En outre, cette demande de brevet propose une solution, permettant de prendre en compte la situation exposée ci-dessus, consistant à intercaler un mobile spécifique, mais complexe, entre l'engrenage différentiel et le mobile d'affichage de la réserve de marche.The patent application EP 1 139 182 A1 , published October 4, 2001 proposes an alternative differential gearing, implementing conical type gears, less bulky than those described above. In addition, this patent application proposes a solution, to take into account the situation described above, consisting in interposing a specific mobile, but complex, between the differential gear and the mobile display of the power reserve.

Divulgation de l'inventionDisclosure of the invention

Un but principal de la présente invention est de proposer une alternative aux engrenages différentiels connus de l'art antérieur, en particulier pour commander des mécanismes d'affichage de la réserve de marche, en proposant un engrenage différentiel intégrant une sécurité contre les risques liés au remontage excessif du ressort de barillet, tout en ayant une structure simple et peu encombrante. L'invention concerne également un tel engrenage différentiel comprenant une sécurité contre des risques similaires lorsqu'il est mis en oeuvre dans un mécanisme autre qu'un mécanisme d'affichage de la réserve de marche.A main object of the present invention is to propose an alternative to the differential gears known from the prior art, in particular for controlling the power reserve display mechanisms, by proposing a differential gear incorporating a safety against Risks related to the excessive winding of the mainspring, while having a simple and compact structure. The invention also relates to such a differential gear comprising a security against similar risks when it is implemented in a mechanism other than a mechanism for displaying the power reserve.

A cet effet, la présente invention concerne plus particulièrement un engrenage différentiel du type mentionné plus haut, caractérisé par le fait que son porte-satellite est rendu solidaire en rotation de l'arbre central par l'intermédiaire d'un dispositif à friction comportant un tube présentant une première portion disposée en appui contre l'arbre central et au moins une seconde portion disposée en appui contre le porte-satellite.For this purpose, the present invention more particularly relates to a differential gear of the type mentioned above, characterized in that its carrier is made integral in rotation with the central shaft by means of a friction device comprising a tube having a first portion disposed in abutment against the central shaft and at least a second portion disposed in abutment against the planet carrier.

De manière préférée, on peut prévoir que le tube comprend une jupe sensiblement cylindrique dans laquelle au moins une première languette est formée de telle manière qu'elle exerce une force présentant une composante radiale sur le porte-satellite, qui peut être centripète ou centrifuge suivant des variantes de réalisation. En outre, la jupe peut comprendre au moins une languette supplémentaire, de longueur légèrement supérieure à celle de la première languette pour définir une butée de positionnement du tube en relation avec un épaulement de l'arbre central.Preferably, the tube may comprise a substantially cylindrical skirt in which at least one first tongue is formed in such a way that it exerts a force having a radial component on the planet carrier, which can be centripetal or centrifugal according to variants of embodiment. In addition, the skirt may comprise at least one additional tongue of slightly longer length than the first tongue to define a positioning stop of the tube in relation to a shoulder of the central shaft.

Grâce à ces caractéristiques, un mécanisme spécifique et distinct de sauvegarde des engrenages n'est pas nécessaire dans la mesure où un tel mécanisme est intégré directement à l'engrenage différentiel. Ce dernier conserve malgré cela des dimensions très raisonnables, du fait de l'agencement judicieux du tube de friction.Thanks to these characteristics, a specific and distinct mechanism for safeguarding the gears is not necessary insofar as such a mechanism is integrated directly into the differential gearing. The latter nevertheless retains very reasonable dimensions, because of the judicious arrangement of the friction tube.

De manière encore plus avantageuse, le tube peut présenter une base munie d'un rebord formant une retenue axiale pour l'une des roues.Even more advantageously, the tube may have a base provided with a flange forming an axial retention for one of the wheels.

Par ailleurs, pour contenir l'encombrement global de l'engrenage différentiel selon la présente invention, il peut être avantageux de prévoir que le satellite présente une denture de type pignon coulant agencée simultanément en prise avec les dentures des première et seconde roues, celles-ci étant radiales.Furthermore, to contain the overall bulk of the differential gear according to the present invention, it may be advantageous to provide that the satellite has a sliding pinion gearing arranged simultaneously in engagement with the teeth of the first and second wheels, being radial.

La présente invention concerne également un mouvement horloger intégrant un engrenage différentiel répondant aux caractéristiques ci-dessus, le mouvement comprenant préférablement un barillet logeant un ressort de barillet dont une première extrémité est reliée cinématiquement à un rouage de finissage et une seconde extrémité est reliée cinématiquement à un dispositif de remontage, l'engrenage différentiel étant agencé pour commander un mécanisme d'affichage de la réserve de marche du ressort de barillet.The present invention also relates to a watch movement incorporating a differential gear corresponding to the above characteristics, the movement preferably comprising a barrel housing a mainspring whose one end is kinematically connected to a finishing gear and a second end is kinematically connected to a winding device, the differential gear being arranged to control a mechanism for displaying the power reserve of the mainspring.

Brève description des dessinsBrief description of the drawings

D'autres caractéristiques et avantages de la présente invention apparaîtront plus clairement à la lecture de la description détaillée d'un mode de réalisation préféré qui suit, faite en référence aux dessins annexés donnés à titre d'exemples non limitatifs et dans lesquels:Other features and advantages of the present invention will appear more clearly on reading the detailed description of a preferred embodiment which follows, made with reference to the accompanying drawings given by way of non-limiting examples and in which:

- la figure 1 représente une vue en perspective coupée d'un engrenage différentiel selon un mode de réalisation préféré de la présente invention;- the figure 1 is a cutaway perspective view of a differential gear according to a preferred embodiment of the present invention;

- la figure 2 représente une vue en perspective simplifiée d'un élément constitutif de l'engrenage différentiel de la figure 1;- the figure 2 represents a simplified perspective view of a constituent element of the differential gear of the figure 1 ;

- la figure 3 représente une vue en coupe simplifiée de l'élément de la figure 2;- the figure 3 represents a simplified sectional view of the element of the figure 2 ;

- la figure 4 représente une vue en perspective simplifiée d'une partie de l'engrenage différentiel de la figure 1 rendant visibles certains détails de construction, et- the figure 4 represents a simplified perspective view of a portion of the differential gear of the figure 1 making certain construction details visible, and

- la figure 5 représente une vue en perspective d'un élément constitutif d'un engrenage différentiel selon une variante de réalisation.- the figure 5 is a perspective view of a constituent element of a differential gear according to an alternative embodiment.

Mode(s) de réalisation de l'inventionMode (s) of realization of the invention

La figure 1 représente une vue en perspective coupée d'un engrenage différentiel 1 selon un mode de réalisation préféré de la présente invention. Plus précisément, environ la moitié avant de l'engrenage différentiel a été retirée pour rendre visible sa structure interne.The figure 1 represents a cutaway perspective view of a differential gear 1 according to a preferred embodiment of the present invention. Specifically, about the front half of the differential gear has been removed to make visible its internal structure.

L'engrenage différentiel 1 comporte un arbre central 2 destiné à en permettre le montage sur un élément de bâti d'un mouvement horloger, l'arbre étant muni d'un pivot à chacune de ses extrémités 3 et 4.The differential gear 1 comprises a central shaft 2 intended to be mounted on a frame member of a watch movement, the shaft being provided with a pivot at each of its ends 3 and 4.

Un pignon de sortie 5 est taillé directement dans la masse de l'arbre central à proximité de l'une de ses extrémités 3. Bien entendu, le pignon pourrait également être formé à part puis rapporté sans sortir du cadre de la présente invention. Le pignon est suivi d'une portion support 6 cylindrique, elle-même suivie d'une portion principale 7 de l'arbre, également cylindrique mais de diamètre plus faible et s'étendant jusqu'à l'autre extrémité 4 de l'arbre.An output gear 5 is cut directly into the mass of the central shaft near one of its ends 3. Of course, the pinion could also be formed separately and reported without departing from the scope of the present invention. The pinion is followed by a cylindrical support portion 6, itself followed by a main portion 7 of the shaft, also cylindrical but of smaller diameter and extending to the other end 4 of the shaft .

Une première roue 8 d'entrée de l'engrenage différentiel, portée par un moyeu 9 est disposée en appui sur la portion support 6, en étant retenue axialement par le pignon 5. Le moyeu comprend une base, dans laquelle une denture radiale 10 est ménagée, la base étant surmontée d'un canon 11 sur lequel la première roue 8 est chassée.A first input gear 8 of the differential gear, carried by a hub 9, is placed in abutment on the support portion 6, being retained axially by the pinion 5. The hub comprises a base, in which a radial toothing 10 is arranged, the base being surmounted by a barrel 11 on which the first wheel 8 is driven.

La longueur de la portion support 6 est très légèrement supérieure à la hauteur du moyeu 9.The length of the support portion 6 is slightly greater than the height of the hub 9.

Un tube 12 intermédiaire est ensuite engagé sur la portion principale 7 de l'arbre central 2, la recouvrant sensiblement jusqu'à la seconde extrémité 4 de ce dernier. La structure du tube 12 sera décrite en détail plus loin en relation avec la description détaillée des figures 2 et 3. Il apparaît déjà de la figure 1, d'après la vue en coupe transversale du tube 12, que celui-ci présente une base 14 pourvue d'un rebord annulaire présentant la forme d'une collerette de retenue 15, suivie d'une portion support 16, présentant une épaisseur de matière importante, et elle-même suivie d'une portion principale 17, ou jupe, plus fine et s'étendant jusqu'à un épaulement 18 de l'arbre central 2, défini par la jonction entre la portion support 6 de ce dernier et sa portion principale 7.An intermediate tube 12 is then engaged on the main portion 7 of the central shaft 2, covering it substantially to the second end 4 of the latter. The structure of the tube 12 will be described in detail later in connection with the detailed description of the figures 2 and 3 . It already appears from the figure 1 from the cross-sectional view of the tube 12, that the latter has a base 14 provided with an annular rim in the form of a retaining flange 15, followed by a support portion 16 having a thickness of important material, and itself followed by a main portion 17, or skirt, thinner and extending to a shoulder 18 of the central shaft 2, defined by the junction between the support portion 6 of the latter and its main portion 7.

Avant la mise en place du tube 12 sur l'arbre central 2, un porte-satellite 20 est engagé sur la portion principale 17 du tube.Before placing the tube 12 on the central shaft 2, a planet carrier 20 is engaged on the main portion 17 of the tube.

Le porte-satellite 20 comprend des première et seconde bagues 21, 22 coaxiales, reliées l'une à l'autre au moyen d'un flasque 24. Par ailleurs, un arbre 25 est porté par les bagues, suivant une direction perpendiculaire à la direction de l'arbre central 2, et porte un satellite 26.The planet carrier 20 comprises first and second coaxial rings 21, 22 connected to each other by means of a flange 24. Furthermore, a shaft 25 is carried by the rings, in a direction perpendicular to the direction of the central shaft 2, and carries a satellite 26.

Le porte-satellite 20 remplit en outre la fonction de retenue pour une seconde roue d'entrée 28 de l'engrenage différentiel, préalablement engagée sur la portion support 16 du tube.The planet carrier 20 also fills the retaining function for a second input wheel 28 of the differential gear, previously engaged on the support portion 16 of the tube.

De manière similaire à la première roue 8, la seconde roue d'entrée 28 est portée par un moyeu 29 comprenant une base, dans laquelle une denture radiale 30 est ménagée, la base étant surmontée d'un canon 31 sur lequel la seconde roue 28 est chassée. Le moyeu 29 est, d'une part, disposé en butée contre la collerette de retenue 15 en étant, d'autre part, retenu par le porte-satellite 20.Similarly to the first wheel 8, the second input wheel 28 is carried by a hub 29 comprising a base, in which a radial toothing 30 is formed, the base being surmounted by a barrel 31 on which the second wheel 28 is hunted. The hub 29 is, on the one hand, disposed in abutment against the retaining collar 15 while being, on the other hand, retained by the planet carrier 20.

Les moyeux 9, 29 sont disposés en sens opposés, de sorte que leurs dentures sont en regard l'une de l'autre, de manière à pouvoir coopérer avec le satellite 26.The hubs 9, 29 are arranged in opposite directions, so that their teeth are facing one another, so as to cooperate with the satellite 26.

De manière conventionnelle, l'une des roues est reliée cinématiquement à une première extrémité du ressort de barillet, soit par l'intermédiaire notamment du tambour de barillet ou de l'arbre de barillet, tandis que l'autre roue est reliée cinématiquement à l'autre extrémité du ressort de barillet. Ainsi, de manière connue, les changements dans l'état de charge du ressort de barillet, en fonction de la marche normale de la pièce d'horlogerie correspondante ou d'éventuelles opérations de remontage manuel ou automatique, sont pris en compte pour être transmis à un mobile d'affichage de la réserve de marche, à partir de la sortie de l'engrenage différentiel 1, soit le pignon de sortie 5.Conventionally, one of the wheels is kinematically connected to a first end of the mainspring, either via the barrel drum or the barrel shaft, while the other wheel is kinematically connected to the barrel spring. other end of the mainspring. Thus, in known manner, the changes in the state of charge of the mainspring, as a function of the normal operation of the corresponding timepiece or possible manual or automatic winding operations, are taken into account to be transmitted. a mobile display of the power reserve, from the output of the differential gear 1, the output gear 5.

On notera que les roues d'entrée tournent dans des sens opposés pour entraîner le porte-satellite dans des sens de rotation respectifs opposés.Note that the input wheels rotate in opposite directions to drive the planet carrier in opposite respective directions of rotation.

La figure 2 représente une vue en perspective simplifiée du tube 12 isolé et permet de mieux discerner sa structure, plus particulièrement celle de sa portion principale 17.The figure 2 represents a simplified perspective view of the isolated tube 12 and allows better discerning its structure, especially that of its main portion 17.

Celle-ci présente une forme générale cylindrique mais est constituée, dans le présent mode de réalisation illustré à titre non limitatif, de deux paires de languettes 34, 35, deux languettes d'une même paire étant diamétralement opposées par rapport à l'axe du tube.This latter has a generally cylindrical shape but is constituted, in the present embodiment illustrated by way of non-limiting example, of two pairs of tongues 34, 35, two tongues of the same pair being diametrically opposed with respect to the axis of the tube.

On distingue une paire de languettes longues 34 plus particulièrement destinées à jouer le rôle de butées de positionnement lorsque le tube est engagé sur l'arbre central 2, comme cela a déjà été mentionné plus haut.There is a pair of long tabs 34 more particularly intended to act as positioning stops when the tube is engaged on the central shaft 2, as already mentioned above.

Les extrémités libres des languettes présentent toutes une surépaisseur de sorte que le diamètre de la portion principale 17 du tube, au niveau des extrémités libres des languettes, est similaire au diamètre de l'extrémité opposée de la portion principale 17, c'est-à-dire celle qui est reliée à la portion support 16. Ce diamètre correspond sensiblement au diamètre interne de la bague 21 du porte-satellite 20, tel que cela ressort de la figure 1.The free ends of the tongues all have an extra thickness so that the diameter of the main portion 17 of the tube, at the free ends of the tongues, is similar to the diameter of the opposite end of the main portion 17, that is to say ie that which is connected to the support portion 16. This diameter substantially corresponds to the internal diameter of the ring 21 of the planet carrier 20, as is apparent from FIG. figure 1 .

Ainsi, le porte-satellite 20 est ajusté sur le tube 12. Toutefois, la structure particulière de la portion principale 17 du tube lui confère des propriétés élastiques, en particulier par déformation des languettes 35, qui permettent un glissement relatif entre le tube et le porte-satellite lorsque le couple à transmettre entre ces éléments dépasse une valeur prédéfinie atteinte lorsque le ressort de barillet atteint sa pleine charge. En-dessous de cette valeur prédéfinie, les languettes 35 exercent une force présentant une composante radiale, centrifuge ici, sur le porte-satellite 20 telle que ces deux éléments sont solidaires en rotation.Thus, the planet carrier 20 is fitted on the tube 12. However, the particular structure of the main portion 17 of the tube gives it elastic properties, in particular by deformation of the tongues 35, which allow relative sliding between the tube and the tube. carrier when the torque to be transmitted between these elements exceeds a preset value reached when the mainspring reaches its full load. Below this predefined value, the tabs 35 exert a force having a radial component, centrifugal here, on the planet carrier 20 such that these two elements are integral in rotation.

Le fait que les languettes courtes 35 ne soient pas en butée contre l'arbre central permet un meilleur contrôle de leur contribution à la définition de la valeur de couple maximale souhaitée avant glissement.The fact that the short tongues 35 are not in abutment against the central shaft allows better control of their contribution to the definition of the desired maximum torque value before sliding.

La figure 3 représente une vue en coupe simplifiée du tube 12 de la figure 2, sur laquelle ont été schématisées différentes configurations des languettes 35, pour illustrer de quelle manière leur degré de déformation peut être ajusté en fonction de la force souhaitée pour agir sur le porte-satellite.The figure 3 represents a simplified sectional view of the tube 12 of the figure 2 , on which have been schematically different configurations of the tabs 35, to illustrate how their degree of deformation can be adjusted according to the desired force to act on the carrier.

La figure 4 représente une vue en perspective simplifiée d'une partie de l'engrenage différentiel de la figure 1 rendant visibles certains détails de construction. Plus précisément, la première roue d'entrée 8 a été retirée pour illustrer plus clairement le porte-satellite 20 et le satellite 26 selon le présent mode de réalisation préféré de la présente invention.The figure 4 represents a simplified perspective view of a portion of the differential gear of the figure 1 making certain construction details visible. Specifically, the first input wheel 8 has been removed to more clearly illustrate the planet carrier 20 and the satellite 26 in accordance with the present preferred embodiment of the present invention.

Il ressort de cette figure que le flasque 24 reliant les première et seconde bagues 21, 22 présente une pluralité d'ouvertures 40, notamment pour l'alléger. Bien entendu, il est possible de prévoir, en alternative, que des bras sont utilisés pour relier les première et seconde bagues l'une à l'autre en lieu et place du flasque, sans sortir du cadre de la présente invention.It emerges from this figure that the flange 24 connecting the first and second rings 21, 22 has a plurality of openings 40, in particular to lighten it. Of course, it is possible to provide, alternatively, that arms are used to connect the first and second rings to each other instead of the flange, without departing from the scope of the present invention.

Par ailleurs, le flaque 24 comprend une ouverture supplémentaire 41 dans laquelle est logé le satellite 26, porté par l'arbre 25.Moreover, the puddle 24 comprises an additional opening 41 in which the satellite 26 is housed, carried by the shaft 25.

Il apparaît également de la figure 4 que le satellite 26 présente une forme particulière, à savoir que celle-ci est similaire à celle d'un pignon coulant, utilisé dans les mécanismes de remontage, dans lequel les dents Breguet conventionnelles n'ont pas été taillées.It also appears from the figure 4 that the satellite 26 has a particular shape, namely that it is similar to that of a sliding pinion, used in the winding mechanisms, in which the conventional Breguet teeth have not been cut.

Ainsi, le satellite 26 comporte une denture 42 de type pignon coulant, c'est-à-dire une denture de chant orientée suivant une direction sensiblement parallèle à l'axe de rotation du satellite en présentant une symétrie suivant cet axe. Grâce à cette caractéristique, le satellite peut engrener avec des dentures radiales conventionnelles, qui sont celles portées par les moyeux 9 et 29 dans le mode de réalisation représenté ici. De ce fait, l'encombrement de l'engrenage différentiel selon la présente invention est réduit dans le sens de la hauteur par rapport à un engrenage différentiel conventionnel dans lequel le satellite présente la forme d'un pignon conventionnel à denture radiale.Thus, the satellite 26 has a toothing 42 of the sliding pinion type, that is to say a set of teeth oriented in a direction substantially parallel to the axis of rotation of the satellite having a symmetry along this axis. With this feature, the satellite can mesh with conventional radial gears, which are those carried by the hubs 9 and 29 in the embodiment shown here. As a result, the bulk of the differential gear according to the present invention is reduced in the direction of height with respect to a conventional differential gear in which the satellite has the form of a conventional gear with radial teeth.

Par ailleurs, le satellite 26 comprend une gorge annulaire 43 destinée ici à coopérer avec des doigts 44 ménagés dans le flasque 24 du porte-satellite 20 pour assurer un bon positionnement du satellite par rapport au porte-satellite, donc par rapport aux première et seconde roues d'entrées 8 et 28.Furthermore, the satellite 26 comprises an annular groove 43 intended here to cooperate with the fingers 44 formed in the flange 24 of the planet carrier 20 to ensure a good positioning of the satellite relative to the planet carrier, and therefore with respect to the first and second input wheels 8 and 28.

Il ressort plus particulièrement de la vue de la figure 4 que non seulement, la construction de l'engrenage différentiel selon le présent mode de réalisation préféré présente un encombrement réduit dans le sens de l'épaisseur et un assemblage simplifié par rapport aux engrenages de l'art antérieur, mais en outre il permet de procurer une grande stabilité au satellite 26 sur son arbre 25 du fait de la longueur importante de ces deux éléments.It is particularly apparent from the view of the figure 4 that not only the construction of the differential gear according to the present preferred embodiment has a reduced bulk in the direction of the thickness and a simplified assembly compared to the gears of the prior art, but it also makes it possible to provide a high stability to the satellite 26 on its shaft 25 due to the large length of these two elements.

La figure 5 représente une vue en perspective d'un arbre central 60, selon une variante de réalisation, destiné à coopérer avec un tube comme décrit précédemment.The figure 5 is a perspective view of a central shaft 60, according to an alternative embodiment, intended to cooperate with a tube as described above.

L'arbre central 60 comporte une portion conique 61 destinée à coopérer avec les extrémités des languettes 35, celles-ci devant ainsi être déformées en direction de l'intérieur et non plus de l'extérieur comme c'était le cas dans le mode de réalisation précédent. De ce fait, le tube exerce une force centripète sur l'arbre central 60 pour produire un effet similaire à celui évoqué plus haut. Le tube est, dans ce cas, solidaire en rotation du porte-satellite.The central shaft 60 has a conical portion 61 intended to cooperate with the ends of the tongues 35, these being thus to be deformed towards the inside and no longer from the outside as was the case in the previous realization. As a result, the tube exerts a centripetal force on the central shaft 60 to produce an effect similar to that discussed above. The tube is, in this case, integral in rotation with the planet carrier.

On notera que, dans un cas comme dans l'autre, on peut exprimer la force de frottement F assurant la transmission des mouvements de rotation du tube au porte-satellite (dans le premier cas) ou à l'arbre central (dans le second cas) comme étant égale au produit de p par N, où p est le coefficient de frottement, dépendant des deux matériaux en contact l'un avec l'autre, et N est la force radiale exercée par le tube sur le porte-satellite ou sur l'arbre central du fait de la déformation de ses languettes 35. La structure particulière du tube permet un ajustement relativement précis de la valeur de N, p étant connu à partir du moment où les matériaux concernés ont été sélectionnés. Ainsi la valeur de F, directement liée au moment de force impliqué entre les deux éléments en contact, peut être ajustée de manière relativement précise (le moment étant égal au produit de F par le rayon au point d'application de F, soit le point de contact entre les deux organes concernés).It will be noted that, in one case as in the other, it is possible to express the friction force F ensuring the transmission of the rotational movements of the tube to the planet carrier (in the first case) or to the central shaft (in the second case). case) as being equal to the product of p by N, where p is the coefficient of friction, depending on the two materials in contact with each other, and N is the radial force exerted by the tube on the carrier or on the central shaft due to the deformation of its tongues 35. The particular structure of the tube allows a relatively accurate adjustment of the value of N, p being known from the moment when the materials concerned were selected. Thus the value of F, directly related to the moment of force involved between the two elements in contact, can be adjusted relatively accurately (the moment being equal to the product of F by the radius at the point of application of F, the point contact between the two bodies concerned).

Par conséquent, la valeur seuil du moment de force à partir de laquelle le tube glisse par rapport à l'autre organe impliqué peut être ajustée pour être proche de la valeur nécessaire à la transmission des moments de force nécessaires pour assurer le bon fonctionnement du mécanisme horloger correspondant, ce qui permet de réduire l'usure des pièces liée aux frottements, comparativement aux mécanismes connus de l'art antérieur. On notera en outre que si les languettes 35 sont déformées de manière trop importante dans un sens donné, elles peuvent être ramenées dans le sens opposé, éventuellement de manière réversible suivant la nature du matériau employé.Therefore, the threshold value of the moment of force from which the tube slides relative to the other member involved can be adjusted to be close to the value necessary for the transmission of the moments of force necessary to ensure the proper functioning of the mechanism. corresponding watchmaker, which reduces the wear of parts related to friction, compared to known mechanisms of the prior art. Note further that if the tongues 35 are deformed too much in a given direction, they can be brought back in the opposite direction, possibly reversibly depending on the nature of the material used.

La description qui précède s'attache à décrire un mode de réalisation particulier à titre d'illustration non limitative et, l'invention n'est pas limitée à la mise en oeuvre de certaines caractéristiques particulières qui viennent d'être décrites, comme par exemple la forme spécifiquement illustrée et décrite du porte-satellite, la réalisation illustrée des roues d'entrée ou encore celle de l'arbre central. Ainsi, à titre d'exemple, on notera que le pignon de sortie 5 pourrait être remplacé par une denture ménagée directement sur la périphérie de la collerette de retenue 15 du tube 12 sans sortir du cadre de l'invention. De même, on peut envisager de réaliser seulement deux languettes dans le tube, dont une seule exerce une force à composante radiale sur le porte-satellite ou sur l'arbre central pour assurer la fonction de friction, tandis que l'autre assure le positionnement du tube sur l'arbre central et/ou le guidage du porte-satellite.The foregoing description attempts to describe a particular embodiment by way of non-limiting illustration and the invention is not limited to the implementation of certain particular features which have just been described, for example the specifically illustrated and described form of the carrier, the illustrated embodiment of the input wheels or that of the central shaft. Thus, by way of example, it will be noted that the output gear 5 could be replaced by a toothing provided directly on the periphery of the retaining collar 15 of the tube 12 without departing from the scope of the invention. Similarly, it is conceivable to produce only two tabs in the tube, of which only one exerts a radial component force on the planet carrier or on the central shaft to provide the friction function, while the other provides the positioning of the tube on the central shaft and / or the guide of the planet carrier.

L'homme du métier ne rencontrera pas de difficulté particulière pour adapter le contenu de la présente divulgation à ses propres besoins et mettre en oeuvre un engrenage différentiel différent de celui selon le mode de réalisation décrit ici, mais dans lequel le porte-satellite est rendu solidaire en rotation de l'arbre central par l'intermédiaire d'un dispositif à friction comportant un tube présentant une première portion disposée en appui contre l'arbre central et au moins une seconde portion disposée en appui contre le porte-satellite, sans sortir du cadre de la présente invention qui est définie par les revendications annexées. On notera également que l'engrenage différentiel de la présente invention pourra également être mis en oeuvre dans des mécanismes horlogers autres que ceux destinés à afficher la réserve de marche.The person skilled in the art will not encounter any particular difficulty in adapting the content of the present disclosure to his own needs and implementing a differential gearing different from that according to the embodiment described here, but in which the carrier is rendered integral in rotation with the central shaft by means of a friction device comprising a tube having a first portion disposed in abutment against the central shaft and at least a second portion disposed in abutment against the planet carrier, without leaving of the present invention which is defined by the appended claims. Note also that the differential gear of the present invention may also be implemented in clock mechanisms other than those intended to display the power reserve.

Claims (11)

  1. Differential gear (1) for watch movement comprising a central shaft (2) whereon are rotably mounted first and second wheels (8, 28) of which each is provided with a toothing (10, 30) arranged to mesh with the toothing (42) of at least one satellite (26) borne by a satellite carrier (20) also mounted on said central shaft, said first and second wheels (8, 28) being intended to be engaged with first and second mobiles of the watch movement, said central shaft (2) comprising a toothing (5) intended to be engaged with a third mobile of the watch movement, characterised in that said satellite carrier (20) is rendered secured in rotation with said central shaft (2) by the intermediary of a friction device comprising a friction tube (12) having a first portion (14, 16, 17) arranged bearing against said central shaft and at least one second portion (34, 35) arranged bearing against said satellite carrier (20).
  2. Differential gear (1) according to claim 1, characterised in that said tube (12) comprises a substantially cylindrical skirt (17) wherein at least one first tab (35) is formed in such a way that it exerts a force having a radial component on said satellite carrier (20).
  3. Differential gear (1) according to claim 2, characterised in that said skirt (17) comprises at least one additional tab (34), of a length slightly greater than that of said first tab (35) in order to define a positioning stop of said tube (12) in relation with a shoulder (18) of said central shaft (2).
  4. Differential gear (1) according to any of the preceding claims, characterised in that said tube (12) has a base (14) provided with an edge (15) forming an axial retention for one of said first and second wheels (8, 28).
  5. Differential gear (1) according to any of the preceding claims, characterised in that said satellite (26) has a toothing (42) of the sliding pinion type arranged simultaneously in mesh with said toothings (10, 30) of said first and second wheels (8, 28), those being radial.
  6. Differential gear (1) according to claim 5, characterised in that said satellite carrier (20) comprises two coaxial rings (21, 22), said satellite (26) being mounted in rotation on a shaft (25) of which the ends are borne by said rings.
  7. Differential gear (1) according to claim 5 or 6, characterised in that said satellite (26) has a peripheral groove (43) coaxial to its axis of rotation and in that said satellite carrier (20) comprises at least one finger (44) arranged to be engaged in said groove, in the service position of said satellite, in order to ensure the positioning of the latter.
  8. Differential gear (1) according to any of the preceding claims, characterised in that said first and second wheels (8, 28) are arranged to be connected kinetically respectively to first and second ends of a barrel spring, said central shaft (2) being arranged to be connected kinetically to a display mechanism of the running reserve of the barrel spring.
  9. Watch movement comprising a differential gear according to any of claims 1 to 8.
  10. Watch movement according to claim 9, comprising a barrel housing a barrel spring of which a first end is connected kinetically to a going train and a second end is connected kinetically to a device for rewinding, said differential gear (1) being arranged to control a display mechanism of the running reserve of said barrel spring.
  11. Timepiece provided with a watch movement according to claim 9 or 10.
EP09162837.0A 2009-06-16 2009-06-16 Differential gear for a timepiece movement Active EP2264551B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP09162837.0A EP2264551B1 (en) 2009-06-16 2009-06-16 Differential gear for a timepiece movement
JP2010128088A JP5578500B2 (en) 2009-06-16 2010-06-03 Differential gear for watch mechanism
CN2010101992449A CN101923313B (en) 2009-06-16 2010-06-12 Differential gear for a timepiece movement
US12/817,059 US8251574B2 (en) 2009-06-16 2010-06-16 Differential gear for watch movement
HK11101532.0A HK1147568A1 (en) 2009-06-16 2011-02-16 Differential gear for watch movement

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EP09162837.0A EP2264551B1 (en) 2009-06-16 2009-06-16 Differential gear for a timepiece movement

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EP2264551B1 true EP2264551B1 (en) 2013-08-07

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Families Citing this family (8)

* Cited by examiner, † Cited by third party
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CH705079A1 (en) * 2011-06-10 2012-12-14 Haute Ecole Arc Mechanical energy source for watch movement with predefined output torque.
EP2546706B1 (en) * 2011-07-13 2017-02-22 ETA SA Manufacture Horlogère Suisse Clockwork including a module provided with a mobile meshing with another mobile pivoting in a base on which the module is mounted
CH705836B1 (en) * 2011-12-02 2016-01-15 Lvmh Swiss Mft Sa Timepiece.
EP3098668B1 (en) * 2015-05-29 2018-10-31 ETA SA Manufacture Horlogère Suisse Power reserve indicator for a timepiece
CH711931A2 (en) * 2015-12-18 2017-06-30 Montres Breguet Sa Mechanism for adjusting the torque ratio between clockwork mobiles.
EP3208664B1 (en) * 2016-02-19 2023-08-16 Omega SA Timepiece mechanism or clock without magnetic signature
BE1024256B1 (en) * 2016-06-02 2018-01-16 Mintiens Benoît Mechanical timepiece.
EP3584642B1 (en) * 2018-06-18 2021-01-13 Montres Breguet S.A. Setting mechanism for watch display mechanism comprising a rotating drum.

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH263707A (en) 1947-11-27 1949-09-15 Le Coultre & Cie Wristwatch.
US2774252A (en) * 1954-09-04 1956-12-18 Felsa S A Differential gear
JPS5723880A (en) * 1980-07-18 1982-02-08 Ricoh Elemex Corp Train wheel construction of watch
EP0973076B1 (en) * 1998-07-16 2008-02-13 ETA SA Manufacture Horlogère Suisse Watch with tourbillon
EP1139182B1 (en) 2000-03-27 2007-10-03 Vaucher Manufacture Fleurier SA Reserve power indicating mechanism and timepiece provided with such a mechanism
EP1498789A1 (en) * 2003-07-14 2005-01-19 Eterna SA Winding state indicator mechanism for a mechanical timepiece
EP1925995B1 (en) * 2006-11-21 2014-06-18 Christophe Claret Engineering S.A. Chiming mechanism
DE602008003534D1 (en) * 2008-04-30 2010-12-30 Cartier Creation Studio Sa Mechanism for preventing gear variations due to the action of gravity on a regulating device with balance spring and clock equipped with this mechanism

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CN101923313A (en) 2010-12-22
JP2011002451A (en) 2011-01-06
US8251574B2 (en) 2012-08-28
US20100315908A1 (en) 2010-12-16
CN101923313B (en) 2013-03-20
JP5578500B2 (en) 2014-08-27
HK1147568A1 (en) 2011-08-12
EP2264551A1 (en) 2010-12-22

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