EP2834712B1 - Barrel including a barrel spring and a barrel arbour - Google Patents

Barrel including a barrel spring and a barrel arbour Download PDF

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Publication number
EP2834712B1
EP2834712B1 EP13713910.1A EP13713910A EP2834712B1 EP 2834712 B1 EP2834712 B1 EP 2834712B1 EP 13713910 A EP13713910 A EP 13713910A EP 2834712 B1 EP2834712 B1 EP 2834712B1
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EP
European Patent Office
Prior art keywords
barrel
spring
shaft
groove
height
Prior art date
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Active
Application number
EP13713910.1A
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German (de)
French (fr)
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EP2834712A1 (en
Inventor
Jean-Louis Bertrand
Albert BORTOLI
Thomas Gyger
Vincent von Niederhäusern
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Rolex SA
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Rolex SA
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Publication date
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Priority to EP21206061.0A priority Critical patent/EP3968093A1/en
Priority to EP13713910.1A priority patent/EP2834712B1/en
Publication of EP2834712A1 publication Critical patent/EP2834712A1/en
Application granted granted Critical
Publication of EP2834712B1 publication Critical patent/EP2834712B1/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
    • G04B1/00—Driving mechanisms
    • G04B1/10—Driving mechanisms with mainspring
    • G04B1/14—Mainsprings; Bridles therefor
    • 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
    • G04B1/00—Driving mechanisms
    • G04B1/10—Driving mechanisms with mainspring
    • G04B1/18—Constructions for connecting the ends of the mainsprings with the barrel or the arbor
    • 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
    • G04B1/00—Driving mechanisms
    • G04B1/10—Driving mechanisms with mainspring
    • G04B1/16—Barrels; Arbors; Barrel axles

Definitions

  • the invention relates to a clockwork movement barrel shaft or a clockwork movement barrel shaft. It also relates to a clockwork movement barrel spring or a clockwork movement barrel spring. It also relates to a barrel comprising such a shaft and / or such a spring. Finally, it relates to a watch movement or a timepiece, in particular a wristwatch, comprising such a shaft and / or such a spring.
  • the Illustrated Professional Dictionary of Watchmaking describes a conventional construction of a barrel shaft for attaching a barrel spring.
  • the shaft serves as a support for the drum and the barrel cover: the bearing surfaces allow the drum and the cover to be wedged in the axial direction, and the contacts between the shaft, the drum and the cover allow the drum to pivot around the shaft. 'tree.
  • the shaft further comprises a median cylindrical part which is called “bung” and which is provided with a hook to which the barrel spring is attached through a rectangular opening (called “squab”) made near the end. inside of the spring.
  • the watch barrel must perform two apparently contradictory functions: on the one hand, to supply the energy necessary to drive the finishing gear train and to maintain the oscillations of the balance-spring by unwinding the spring, and on the other hand , allow the winding of this same spring at all times.
  • the cover and the drum must be able to pivot on the shaft.
  • the barrel shaft is connected to a ratchet, and a rotation of the ratchet (driven by the winding chain and / or the module chain automatic) is used to charge the spring, which is integral with the shaft.
  • the spring when disarming, drives the drum and the cover and thus the finishing gear which leads to the escapement and the oscillator.
  • the drum and the cover must thus be able to pivot on the shaft, which must itself be able to pivot in a stonework.
  • This requirement is not trivial to put into practice, and is generally implemented by a stepped construction of the barrel shaft, with a succession of cylindrical surfaces of increasing diameters which define spans, forming pivot surfaces with stones for the pivoting of the shaft, with the drum and the cover, and finally a diameter to secure the spring to the shaft.
  • DE 612 146 C reveals a watch barrel comprising a spring 3 and a shaft 1, the spring comprising two portions with two different heights, the first height corresponding to the portion containing the element 5 and the second height corresponding to the portion containing the element 4.
  • the object of the invention is to provide a watch barrel comprising a barrel shaft and a barrel spring making it possible to remedy the aforementioned drawbacks and to improve the barrel shafts or barrel springs known from the prior art.
  • a barrel shaft makes it possible to achieve a reliable, industrial, removable fixing without severe plastic deformation of the spring, while giving the possibility of minimizing the diameter of the bung without having to modify the standard arrangement of the barrel.
  • a watch barrel according to the invention is defined by claim 1.
  • Embodiments of the barrel are defined by claims 2 to 10.
  • a movement according to the invention is defined by claim 11.
  • a watch according to the invention is defined by claim 12.
  • the barrel mainly comprises a barrel shaft 1, a barrel spring 2, a barrel drum 3a and a barrel cover 3b (not shown in the figure. figure 3 ).
  • the barrel drum has teeth making it possible to drive the cogs of a clockwork mechanism, in particular of a wristwatch mechanism.
  • the barrel makes it possible to store the mechanical energy necessary for the operation of the watch mechanism. This energy is stored in the form of elastic potential energy, due to the deformation of the spring.
  • the spring comprises a leaf spring wound in the drum around the shaft, the spring being mechanically linked to the shaft at its inner end 5 and being mechanically linked to the drum at its outer end. When the spring is fully charged, it is wound on the shaft and it tends to cause the drum to rotate relative to the shaft.
  • the spring is shown unarmed at the figure 3 , the spring being wound on itself at the level of the inside of the diameter of the drum. In this configuration, the spring does not tend to drive the drum in rotation. To arm the spring, it suffices to drive the shaft in rotation around its axis.
  • a barrel spring 2 is shown partially at the bottom. figure 2 . It comprises a first portion 50 (or active part) of a first height H and a second portion 52 of a second height h less than the first height. It also includes at the second portion, for example at the inner end, a first hooking element 51 adapted for its attachment to the barrel shaft 1.
  • the first fastening element has a maximum height h '.
  • the second portion is intended to fit into a circumferentially extending groove provided on the barrel shaft. By “extending circumferentially” is meant that the groove extends at least over a part of the circumference of the shaft.
  • the groove has a depth p.
  • the first hooking element 51 is advantageously intended to cooperate with a second hooking element 13a provided on the shaft.
  • the first fastening element may comprise a trapezoidal or substantially trapezoidal conformation 51a, 51b delimited by edges 51a, 51b.
  • the two bases of the trapezoidal shape are oriented according to the height of the spring or substantially according to the height of the spring. Further, preferably, the trapezoidal shape is symmetrical or substantially symmetrical.
  • the second portion can be obtained by implementing a step of machining the spring at its inner end, for example by mechanical cutting, grinding, stamping, laser machining or water jet cutting.
  • the spring advantageously has, before implementation of this step, an elastic band of constant height H.
  • a barrel shaft is described below with reference to figure 1 . It comprises a groove 13 extending over a circumference of the shaft and this groove is intended to receive the barrel spring 2.
  • the tree is a solid tree. On either side of the groove, it preferably comprises shoulders 12 and 14 and bearing surfaces 11 and 15.
  • the cylindrical portion 11 and cylindrical portion 15 allow rotation on the barrel shaft of the drum and of the barrel cover.
  • the shoulder 12 makes it possible to axially stop the drum.
  • the shoulder 14 makes it possible to axially stop the cover.
  • the two shoulders allow the casing of the barrel (cover and drum assembled) to swing away from the shaft.
  • the groove advantageously has a height comparable to the second height h of the spring.
  • the groove comprises at least a portion whose height is less than the height of the active part of the barrel spring and the second portion 52 of the spring can be wound on the shaft in the groove.
  • the section of the shaft has a shape of revolution centered on the axis of the shaft.
  • the section of the shaft can also have the shape of a spiral envelope, the pitch of which is equal or substantially equal to the thickness of the spring.
  • the length of the second portion may correspond to the length of a complete turn wound on the shaft.
  • the groove has a depth at least locally greater than or equal to the thickness of the barrel spring, or even a depth greater than or equal to the thickness of the barrel spring over the entire extent of the groove, or even a depth equal or substantially equal to the thickness of the barrel spring.
  • the groove can extend only part of the circumference of the shaft.
  • the groove can extend over more than 180 ° around the axis of the barrel shaft.
  • the groove may also preferably extend over the entire circumference of the barrel shaft.
  • the groove bottom radius can be scalable, i.e. the groove bottom radius at a groove bottom point can have a value varying with the circumferential position of this point.
  • the shaft comprises, in the groove, in particular at the bottom of the groove, a second hooking element 113a of the barrel spring, the second hooking element being intended to cooperate with the first hooking element 51 provided on the barrel spring.
  • the second attachment element comprises, in the case of figures 1 to 3 a hollow conformation comprising edges 13b and 13c intended to cooperate with the trapezoidal conformation 51a, 51b of the spring. Indeed, the edges 13b and 13c come into contact against the edges 51a and 51b. Due to the trapezoidal shape and depending on the angle of the edges 13b and 13c, there may even be jamming of the end of the spring on the shaft.
  • the trapezoidal shapes 13a and 51 are preferably oriented along the circumference.
  • the second portion 52 of the spring is preferably a non-active part, that is to say a part which does not contribute or very little to the torque developed by the spring, that is to say an unsolicited part or little mechanically stressed in bending.
  • the groove thus preferably has, at its bottom, a diameter less than the outside diameter of the shoulder 12 making it possible to stop the drum of the barrel and / or less than the outside diameter of the shoulder 14 making it possible to stop the cover of the barrel. .
  • portions 16 and 17 are provided to receive the wound turns of the first portion (50) of the spring.
  • the first and second hooking elements have been designed to reduce the bung diameter as much as possible.
  • This reduction is therefore achieved by making a groove or groove on the shaft which advantageously has a height comparable to the second height h of the spring, with a clearance of diameter smaller than that of the shoulders necessary to maintain the drum and cover.
  • the inner end of the spring is cut with a lower band height over a length roughly equivalent to that of the first turn, in order to increase the number of winding turns and therefore the power reserve.
  • the groove or groove is machined inside the shaft and includes a hooking part, in particular a recess serving as a female part.
  • the shape of the internal end of the spring must be adapted accordingly, by cutting a "tab" of lower height than the rest of the blade which allows the first turn to fit into the groove, with a terminal part in the form of a dovetail which acts as a male part.
  • a shell is made, the first turn of which has an internal diameter smaller than the groove machined inside the shaft. This makes it possible to promote the grip by a clamping action of the band on the shaft.
  • the spring is shelled over one turn, in the particular case shown over a height reduced to 0.9 mm with respect to the height of the first portion of 1.46 mm.
  • This shell is pressed against the groove machined inside the shaft, provided with the clearance 13a for the attachment of the dovetail 51, 51a, 51b of the spring.
  • the rotation of the spring is blocked on the shaft thanks to the clearance and its clearance angle.
  • the spring portion is active and its height changes to 1.46 mm.
  • the manufacture of the shaft is facilitated thanks to the elimination of the hook or the lug and the passage of a plug with an evolving diameter to a groove of revolution machinable on a lathe.
  • the machining of the clearance for the hooking of the end is done simply by passing an angle milling cutter (or dovetail milling cutter).
  • the radial and longitudinal supports of the cover and of the drum are done as traditionally on the shaft and the assembly of the barrel within the clockwork movement remains traditional. More particularly, the longitudinal bearing of the drum and of the cover is defined by the shoulders 12 and 14 of the shaft, while the longitudinal bearing of the barrel relative to the blanks is also effected by the shoulders, in this case by the shoulders adjacent to shoulders 12 and 14.
  • the hooking elements also have undeniable advantages for assembling the spring on the barrel shaft.
  • the radius of curvature of the inner coil of the spring before assembly is always less than the bung radius, so as to guarantee a good plating and tightening of the spring on the shaft and adequate fixing.
  • the lower end of the spring must be opened a first time to cross the span and place the spring on the bung. It then takes a second manipulation of opening the spring to move it away from the shaft and thus allow it to pass over the lug by sliding it down.
  • the shell must be placed precisely opposite the lug to ensure good grip of the spring on the shaft.
  • a fixing of the eagle tail or dovetail type makes it possible to correctly position a shell spring without any other manipulation than to slightly open the coil or the internal winding of the formed spring to pass the bearing 12 or 14, then to rotate the shaft to engage the trapezoidal portion of the spring in the corresponding part of the shaft.
  • a second embodiment of a watch barrel comprising a barrel shaft and a barrel spring according to the invention is described below with reference to figures 4 and 5 .
  • the second embodiment differs from the first embodiment only by making the first hooking element 151 and the second hooking element, the first hooking element and the second hooking element being intended to cooperate with one another. with the other.
  • a lug or hook 113a is produced on the shaft at the bottom of the groove 113.
  • the production of such a lug or hook is relatively complicated.
  • the lug or the hook cooperates with a squab or an opening 151 made at the end 105 of the spring.
  • the opening has for example a substantially rectangular shape.
  • the lug or hook is shaped to be inserted into the squab.
  • the tree pivots in a stone at its upper end.
  • the drum 103a pivots on the shaft at the level of the portion 111 and the bearing 112, while the cover 103b does the same on the portion 115 and the bearing 114.
  • a third embodiment of a watch barrel comprising a barrel shaft and a barrel spring according to the invention is described below with reference to figures 6 and 7 .
  • the third embodiment differs from the first embodiment only by the realization of the first hooking element 251 and the second hooking element 213a, the first hooking element and the second hooking element being intended to cooperate with the one with the other.
  • a cutout 213a such as a bore, is made in the shaft at the bottom of the groove 213.
  • This cutout is for example made perpendicular to the axis of the shaft.
  • the cutout cooperates with a pin 251 fixed to the end 205 of the spring.
  • the pin can in particular be riveted to the spring.
  • a fourth embodiment of a watch barrel comprising a barrel shaft and a barrel spring according to the invention is described below with reference to figures 8 and 9 .
  • the fourth embodiment differs from the first embodiment only by the realization of the first hooking element 351 and the second hooking element 313a, the first hooking element and the second hooking element being intended to cooperate with the one with the other.
  • a notch 313a like a radial notch, is made in the shaft at the bottom of the groove 313.
  • the notch cooperates with a fold 351 made at the end 305 of the spring.
  • the second hooking element comprises a protuberance, for example a hook, or a particular conformation of the groove or a recess in the groove and the first hooking element comprises an opening or a conformation. particular of the inner end of the spring or a pin, in particular a riveted pin.
  • the inner end of the spring forms a coil, in particular a diameter, having dimensions such that the coil is deformed when it is mounted on the shaft.
  • the spring can be fixed to the shaft by clipping, wedging, or in the traditional manner with a lug.
  • the hooking is done by means of a tab (male form) cut from the internal end of the leaf spring, which is retained by a corresponding female form machined inside the shaft.
  • a tab male form
  • Such a system therefore comprises an inversion of the male and female parts of the binding with respect to the standard solution: the male part is moved from the shaft onto the spring.
  • the spring of the invention can in particular be made of a material with high mechanical strength, such as for example an amorphous metal alloy described in the application. WO2012010941 .
  • a material with high mechanical strength such as for example an amorphous metal alloy described in the application. WO2012010941 .
  • traditional high-performance metal alloys such as cobalt-based superalloys (Nivaflex or other) or alloys with a high nitrogen content (CrMnN alloys as described in the document CH703796 ) can also be used.
  • the dimensioning of the bung diameter must however take into account the plastic deformation characteristics specific to the state of each material considered.
  • the gain achieved by virtue of the invention can be more or less limited depending on the material chosen (and its hardening state for polycrystalline materials). For this reason, the increase in performance observed with a barrel according to the invention will probably be more marked with a spring of the type described in the application.
  • WO2012010941 or in the document CH703796 only with a Ni
  • the diameter of the groove so that the tab 52 of the inner end of the spring makes more than one turn on the shaft.
  • the active portion of the spring also comprises a portion of reduced height which can be inserted into the groove of the shaft.
  • each spring winding intended to be housed in these grooves has a different height.
  • the heights of the windings can be smaller and smaller as one approaches the inner end of the spring.
  • the shaft may have a groove 413 making it possible to accommodate therein more than one complete winding (or turn) of the spring.
  • one or more winding of the spring can be housed in the groove without this winding protruding by a radial size defined by the diameter 16, 116, 216 or 316.
  • the groove can be stepped.
  • the groove can be seen as constituting several grooves of different heights, made one at the bottom of the other.
  • This stepped groove case makes it possible to accommodate an extent of more than one coil of the spring in the groove without this spring extent projecting from a radial space defined by the diameter 16, 116, 216 or 316.
  • the depth p of the groove is greater than the thickness of the spring.
  • the barrel spring and / or the barrel shaft and / or the barrel of the invention is particularly suitable for taking advantage of the exceptional mechanical properties of amorphous metal alloys.
  • the barrel according to the invention allows a saving of two turns of development with a spring in amorphous metal alloy as described in the application. WO2012010941 .
  • the combination of the barrel according to the invention and of an amorphous metal alloy makes it possible to gain in the above example 40% autonomy, with an identical size of the barrel.
  • the springs were made with the same blade length and flange. However, other factors like flange, shell shape and blade length come into play and the system could be optimized by changing parameters like blade length or flange characteristics.
  • the maximum height h ′ of the first attachment element can advantageously be less than the height H of the first portion.
  • the maximum height h 'of the first fastening element can also be advantageously less than the distance between the bearing surfaces 12 and 14 of the barrel shaft which define the part on which the first portion of the spring comes to rest.
  • the maximum height h 'of the first fastening element can advantageously be greater than the height h of the second portion of the spring, and advantageously greater than the height of the groove 13 of the barrel shaft.
  • the height of the spring on the first turn, including the end, can also be advantageously less than the height of the spring on its outer part (in other words, max (h ', h) ⁇ H where max (a, b) denotes the maximum value of the two parameters a, b).
  • the depth p of the groove is preferably equal or substantially equal to the thickness of the spring.
  • the depth of the groove may be greater than the thickness of the spring.
  • the first hooking element comprises a trapezoidal or substantially trapezoidal part.
  • This trapezoidal part may have a height which decreases as one moves away from the inner end of the spring.
  • the trapezoidal part may have a height varying from the maximum height h 'to the height h.
  • the spring is such that it respects the following condition: H> h '> h
  • the groove intended to receive the spring has, as a second hooking element, a housing or a conformation or a recess complementary or substantially complementary to the first hooking element.
  • the second height h can evolve along the second portion.

Description

L'invention concerne un arbre de barillet de mouvement horloger ou un arbre pour barillet de mouvement horloger. Elle concerne aussi un ressort de barillet de mouvement horloger ou un ressort pour barillet de mouvement horloger. Elle concerne encore un barillet comprenant un tel arbre et/ou un tel ressort. Elle concerne enfin un mouvement horloger ou une pièce d'horlogerie, notamment une montre bracelet, comprenant un tel arbre et/ou un tel ressort.The invention relates to a clockwork movement barrel shaft or a clockwork movement barrel shaft. It also relates to a clockwork movement barrel spring or a clockwork movement barrel spring. It also relates to a barrel comprising such a shaft and / or such a spring. Finally, it relates to a watch movement or a timepiece, in particular a wristwatch, comprising such a shaft and / or such a spring.

Le dictionnaire professionnel illustré de l'horlogerie décrit une construction classique d'un arbre de barillet permettant d'attacher un ressort de barillet. L'arbre sert de support au tambour et au couvercle du barillet: des portées permettent de caler le tambour et le couvercle dans la direction axiale, et les contacts entre l'arbre, le tambour et le couvercle permettent un pivotement du tambour autour de l'arbre. L'arbre comporte de plus une partie cylindrique médiane que l'on appelle "bonde" et qui est munie d'un crochet auquel est attaché le ressort de barillet grâce à une ouverture rectangulaire (dite « pigeonneau ») pratiquée près de l'extrémité intérieure du ressort.The Illustrated Professional Dictionary of Watchmaking describes a conventional construction of a barrel shaft for attaching a barrel spring. The shaft serves as a support for the drum and the barrel cover: the bearing surfaces allow the drum and the cover to be wedged in the axial direction, and the contacts between the shaft, the drum and the cover allow the drum to pivot around the shaft. 'tree. The shaft further comprises a median cylindrical part which is called "bung" and which is provided with a hook to which the barrel spring is attached through a rectangular opening (called "squab") made near the end. inside of the spring.

Le barillet horloger doit assurer deux fonctions apparemment contradictoires : d'une part, fournir l'énergie nécessaire à l'entraînement du rouage de finissage et à l'entretien des oscillations du balancier-spiral par le désarmage du ressort, et d'autre part, permettre en tout temps l'armage de ce même ressort. Pour assurer le bon fonctionnement du barillet, le couvercle et le tambour doivent pouvoir pivoter sur l'arbre.The watch barrel must perform two apparently contradictory functions: on the one hand, to supply the energy necessary to drive the finishing gear train and to maintain the oscillations of the balance-spring by unwinding the spring, and on the other hand , allow the winding of this same spring at all times. To ensure the proper functioning of the barrel, the cover and the drum must be able to pivot on the shaft.

En effet, l'arbre du barillet est relié à un rochet, et une rotation du rochet (entraîné par la chaine de remontage et/ou la chaine du module automatique) permet d'armer le ressort, qui est solidaire de l'arbre. Le ressort, en se désarmant, entraîne le tambour et le couvercle et ainsi le rouage de finissage qui mène à l'échappement et à l'oscillateur. Le tambour et le couvercle doivent ainsi pouvoir pivoter sur l'arbre, qui doit pouvoir lui-même pivoter dans un empierrage. Cette exigence n'est pas triviale à mettre en pratique, et est en général mise en œuvre par une construction étagée de l'arbre de barillet, avec une succession de surfaces cylindriques de diamètres croissants qui définissent des portées, formant des surfaces de pivotement avec les pierres pour le pivotement de l'arbre, avec le tambour et le couvercle, et enfin un diamètre pour solidariser le ressort à l'arbre.Indeed, the barrel shaft is connected to a ratchet, and a rotation of the ratchet (driven by the winding chain and / or the module chain automatic) is used to charge the spring, which is integral with the shaft. The spring, when disarming, drives the drum and the cover and thus the finishing gear which leads to the escapement and the oscillator. The drum and the cover must thus be able to pivot on the shaft, which must itself be able to pivot in a stonework. This requirement is not trivial to put into practice, and is generally implemented by a stepped construction of the barrel shaft, with a succession of cylindrical surfaces of increasing diameters which define spans, forming pivot surfaces with stones for the pivoting of the shaft, with the drum and the cover, and finally a diameter to secure the spring to the shaft.

On connaît du document CH295135 une construction similaire. Dans un tel agencement classique, le diamètre de bonde ne peut pas être diminué pour des raisons de construction. En effet, l'arbre doit assurer le pivotement et le maintien axial du tambour et du couvercle. De plus, un rochet est monté à carré sur l'arbre, généralement au moyen d'une vis, avec un pas de vis correspondant ménagé dans l'arbre. Cette construction classique oblige à étager et donc à augmenter les diamètres sur l'arbre de barillet, en partant des extrémités inférieure et supérieure de l'arbre jusqu'au diamètre de bonde.We know from the document CH295135 a similar construction. In such a conventional arrangement, the bung diameter cannot be reduced for construction reasons. Indeed, the shaft must ensure the pivoting and axial retention of the drum and the cover. In addition, a ratchet is mounted square on the shaft, generally by means of a screw, with a corresponding screw thread formed in the shaft. This conventional construction requires stepping and therefore increasing the diameters on the barrel shaft, starting from the lower and upper ends of the shaft up to the bung diameter.

On connaît du document GB1148042 une fixation du ressort de barillet par insertion de l'extrémité interne du ressort dans une ouverture prévue dans une structure de fixation de ressort ménagée dans la paroi d'un tube faisant office d'arbre de barillet. L'extrémité interne du ressort de barillet est déformée pour coopérer avec la structure de fixation. Un arbre présente une conformation carrée prévue pour coopérer avec des alésages carrés prévus dans la roue de barillet et dans la structure de fixation. Cette solution induit une forte déformation mécanique du ressort de barillet à son extrémité, ce qui n'est pas optimal.We know from the document GB1148042 a fixing of the barrel spring by inserting the internal end of the spring into an opening provided in a spring fixing structure formed in the wall of a tube acting as a barrel shaft. The inner end of the barrel spring is deformed to cooperate with the fixing structure. A shaft has a square conformation designed to cooperate with square bores provided in the barrel wheel and in the fixing structure. This solution induces a strong mechanical deformation of the barrel spring at its end, which is not optimal.

On connaît du document CH295135 une fixation par frottement d'un ressort de barillet sur un arbre, avec une ouverture de forme particulière à l'extrémité du ressort pour permettre un enroulement sans augmentation de l'épaisseur. Le diamètre de l'accroche est alors à peu près équivalent au diamètre de l'arbre, à la surépaisseur d'une spire près. Ce type d'accroche sans lien mécanique est a priori peu fiable.We know from the document CH295135 a friction fixing of a barrel spring on a shaft, with an opening of a particular shape at the end of the spring to allow winding without increasing the thickness. The diameter of the hook is then roughly equivalent to the diameter of the shaft, up to the extra thickness of one turn. This type of grip without mechanical link is a priori unreliable.

On connaît du document CH566044 une attache de ressort réalisée par insertion de l'extrémité intérieure repliée du ressort dans une rainure longitudinale ménagée dans l'arbre. Cette solution induit également une forte déformation mécanique du ressort à son extrémité, ce qui n'est pas optimal.We know from the document CH566044 a spring clip produced by inserting the folded inner end of the spring into a longitudinal groove made in the shaft. This solution also induces a strong mechanical deformation of the spring at its end, which is not optimal.

DE 612 146 C dévoile un barillet horloger comprenant un ressort 3 et un arbre 1, le ressort comprenant deux portions avec deux hauteurs différentes, la première hauteur correspondant à la portion contenant l'élément 5 et la deuxième hauteur correspondant la portion contenant l'élément 4. DE 612 146 C reveals a watch barrel comprising a spring 3 and a shaft 1, the spring comprising two portions with two different heights, the first height corresponding to the portion containing the element 5 and the second height corresponding to the portion containing the element 4.

Ainsi, aucune solution connue ne permet de solidariser un ressort de barillet à un arbre de barillet de façon fiable, industrielle, démontable, sans déformation plastique sévère du ressort, tout en donnant la possibilité de minimiser le diamètre de la bonde sans devoir modifier l'agencement standard du barillet, et en particulier les pivotements du tambour et du couvercle sur l'arbre.Thus, no known solution makes it possible to secure a barrel spring to a barrel shaft in a reliable, industrial, removable manner, without severe plastic deformation of the spring, while giving the possibility of minimizing the diameter of the plug without having to modify the standard arrangement of the barrel, and in particular the pivoting of the drum and of the cover on the shaft.

Dans un autre domaine technique éloigné du domaine horloger, celui des caméras, le document DE 859698 décrit un barillet de caméra. Les enseignements de ce document ne sont pas applicables à la problématique d'un ressort de barillet horloger. En effet, le barillet décrit dans ce document ne permet pas de maximiser l'espace à disposition pour le ressort et la construction utilisée est inexploitable pour réaliser un barillet avec son couvercle et son tambour, pour les raisons suivantes :

  • Le document ne donne aucune indication concernant le placement du tambour et du couvercle, qui doivent pouvoir pivoter sur l'arbre.
  • Une construction traditionnelle ne peut ainsi pas être réalisée à partir de la solution décrite dans le document.
  • De plus, ce type de construction ne permet pas à l'utilisateur d'armer le barillet pendant le fonctionnement de la caméra, ce qui est une exigence fondamentale pour un barillet horloger.
In another technical field far removed from the watchmaking field, that of cameras, the document FROM 859698 describes a camera barrel. The teachings of this document are not applicable to the problem of a watch barrel spring. Indeed, the barrel described in this document does not make it possible to maximize the space available for the spring and the construction used is inoperable to produce a barrel with its cover and its drum, for the following reasons:
  • The document does not give any indication regarding the placement of the drum and the cover, which must be able to pivot on the shaft.
  • A traditional construction can thus not be produced from the solution described in the document.
  • In addition, this type of construction does not allow the user to cock the barrel while the camera is operating, which is a fundamental requirement for a watch barrel.

Le but de l'invention est de fournir un barillet horloger comprenant un arbre de barillet et un ressort de barillet permettant de remédier aux inconvénients mentionnés précédemment et d'améliorer les arbres de barillet ou les ressorts de barillet connus de l'art antérieur. Un arbre de barillet permet de réaliser une fixation fiable, industrielle, démontable, sans déformation plastique sévère du ressort, tout en donnant la possibilité de minimiser le diamètre de la bonde sans devoir modifier l'agencement standard du barillet.The object of the invention is to provide a watch barrel comprising a barrel shaft and a barrel spring making it possible to remedy the aforementioned drawbacks and to improve the barrel shafts or barrel springs known from the prior art. A barrel shaft makes it possible to achieve a reliable, industrial, removable fixing without severe plastic deformation of the spring, while giving the possibility of minimizing the diameter of the bung without having to modify the standard arrangement of the barrel.

Un barillet horloger selon l'invention est défini par la revendication 1.A watch barrel according to the invention is defined by claim 1.

Des modes de réalisation du barillet sont définis par les revendications 2 à 10.Embodiments of the barrel are defined by claims 2 to 10.

Un mouvement selon l'invention est défini par la revendication 11.A movement according to the invention is defined by claim 11.

Une montre selon l'invention est définie par la revendication 12.A watch according to the invention is defined by claim 12.

Les dessins annexés représentent, à titre d'exemples, plusieurs modes de réalisation d'un barillet selon l'invention.

  • La figure 1 est une vue d'un arbre de barillet dans un premier mode de réalisation d'un barillet selon l'invention.
  • La figure 2 est une vue partielle d'un ressort de barillet dans un premier mode de réalisation du barillet selon l'invention.
  • La figure 3 est une vue en perspective du barillet comprenant l'arbre et le ressort selon l'invention.
  • La figure 4 est une vue d'un arbre de barillet dans un deuxième mode de réalisation d'un barillet selon l'invention.
  • La figure 5 est une vue partielle d'un ressort de barillet dans un deuxième mode de réalisation d'un barillet selon l'invention.
  • La figure 6 est une vue d'un arbre de barillet dans un troisième mode de réalisation d'un barillet selon l'invention.
  • La figure 7 est une vue partielle d'un ressort de barillet dans un troisième mode de réalisation d'un barillet selon l'invention.
  • La figure 8 est une vue d'un arbre de barillet dans un quatrième mode de réalisation d'un barillet selon l'invention.
  • La figure 9 est une vue partielle d'un ressort de barillet dans un quatrième mode de réalisation d'un barillet selon l'invention.
  • La figure 10 est une vue d'un arbre de barillet dans un cinquième mode de réalisation d'un barillet selon l'invention.
The accompanying drawings show, by way of example, several embodiments of a barrel according to the invention.
  • The figure 1 is a view of a barrel shaft in a first embodiment of a barrel according to the invention.
  • The figure 2 is a partial view of a barrel spring in a first embodiment of the barrel according to the invention.
  • The figure 3 is a perspective view of the barrel comprising the shaft and the spring according to the invention.
  • The figure 4 is a view of a barrel shaft in a second embodiment of a barrel according to the invention.
  • The figure 5 is a partial view of a barrel spring in a second embodiment of a barrel according to the invention.
  • The figure 6 is a view of a barrel shaft in a third embodiment of a barrel according to the invention.
  • The figure 7 is a partial view of a barrel spring in a third embodiment of a barrel according to the invention.
  • The figure 8 is a view of a barrel shaft in a fourth embodiment of a barrel according to the invention.
  • The figure 9 is a partial view of a barrel spring in a fourth embodiment of a barrel according to the invention.
  • The figure 10 is a view of a barrel shaft in a fifth embodiment of a barrel according to the invention.

Un premier mode de réalisation d'un barillet 4 selon l'invention est décrit ci-après en référence aux figures 1 à 3. Le barillet comprend principalement un arbre de barillet 1, un ressort de barillet 2, un tambour de barillet 3a et un couvercle de barillet 3b (non représenté sur la figure 3).A first embodiment of a barrel 4 according to the invention is described below with reference to figures 1 to 3 . The barrel mainly comprises a barrel shaft 1, a barrel spring 2, a barrel drum 3a and a barrel cover 3b (not shown in the figure. figure 3 ).

Le tambour de barillet présente une denture permettant d'entraîner les rouages d'un mécanisme d'horlogerie, notamment d'un mécanisme de montre bracelet. Le barillet permet de stocker l'énergie mécanique nécessaire au fonctionnement du mécanisme horloger. Cette énergie est stockée sous forme d'énergie potentielle élastique, du fait de la déformation du ressort. En effet, le ressort comprend une lame ressort enroulée dans le tambour autour de l'arbre, le ressort étant mécaniquement lié à l'arbre au niveau de son extrémité intérieure 5 et étant mécaniquement lié au tambour au niveau de son extrémité extérieure. Lorsque le ressort est complètement armé, il est enroulé sur l'arbre et il a tendance à entraîner le tambour en rotation relativement à l'arbre. Le ressort est représenté non-armé à la figure 3, le ressort étant enroulé sur lui-même au niveau de l'intérieur du diamètre du tambour. Dans cette configuration, le ressort ne tend pas à entraîner le tambour en rotation. Pour armer le ressort, il suffit d'entraîner en rotation l'arbre autour de son axe.The barrel drum has teeth making it possible to drive the cogs of a clockwork mechanism, in particular of a wristwatch mechanism. The barrel makes it possible to store the mechanical energy necessary for the operation of the watch mechanism. This energy is stored in the form of elastic potential energy, due to the deformation of the spring. Indeed, the spring comprises a leaf spring wound in the drum around the shaft, the spring being mechanically linked to the shaft at its inner end 5 and being mechanically linked to the drum at its outer end. When the spring is fully charged, it is wound on the shaft and it tends to cause the drum to rotate relative to the shaft. The spring is shown unarmed at the figure 3 , the spring being wound on itself at the level of the inside of the diameter of the drum. In this configuration, the spring does not tend to drive the drum in rotation. To arm the spring, it suffices to drive the shaft in rotation around its axis.

Dans le premier mode de réalisation du barillet horloger, un ressort 2 de barillet est représenté partiellement à la figure 2. Il comprend une première portion 50 (ou partie active) d'une première hauteur H et une deuxième portion 52 d'une deuxième hauteur h inférieure à la première hauteur. Il comprend aussi au niveau de la deuxième portion, par exemple au niveau de l'extrémité intérieure, un premier élément d'accrochage 51 adapté pour sa fixation à l'arbre 1 de barillet. Le premier élément d'accrochage présente une hauteur maximale h'. La deuxième portion est destinée à venir s'insérer dans une rainure s'étendant circonférentiellement et prévue sur l'arbre de barillet. Par « s'étendant circonférentiellement », on entend que la rainure s'étend au moins sur une partie de la circonférence de l'arbre. La rainure présente une profondeur p.In the first embodiment of the watch barrel, a barrel spring 2 is shown partially at the bottom. figure 2 . It comprises a first portion 50 (or active part) of a first height H and a second portion 52 of a second height h less than the first height. It also includes at the second portion, for example at the inner end, a first hooking element 51 adapted for its attachment to the barrel shaft 1. The first fastening element has a maximum height h '. The second portion is intended to fit into a circumferentially extending groove provided on the barrel shaft. By "extending circumferentially" is meant that the groove extends at least over a part of the circumference of the shaft. The groove has a depth p.

Le premier élément d'accrochage 51 est avantageusement destiné à coopérer avec un deuxième élément d'accrochage 13a prévu sur l'arbre. Le premier élément d'accrochage peut comprendre une conformation 51a, 51b trapézoïdale ou sensiblement trapézoïdale délimitée par des bords 51a, 51b. Par exemple, les deux bases de la forme trapézoïdale sont orientées selon la hauteur du ressort ou sensiblement selon la hauteur du ressort. En outre, de manière préférée, la forme trapézoïdale est symétrique ou sensiblement symétrique.The first hooking element 51 is advantageously intended to cooperate with a second hooking element 13a provided on the shaft. The first fastening element may comprise a trapezoidal or substantially trapezoidal conformation 51a, 51b delimited by edges 51a, 51b. For example, the two bases of the trapezoidal shape are oriented according to the height of the spring or substantially according to the height of the spring. Further, preferably, the trapezoidal shape is symmetrical or substantially symmetrical.

La deuxième portion peut être obtenue par mise en œuvre d'une étape d'usinage du ressort au niveau de son extrémité intérieure, par exemple par découpe mécanique, meulage, étampage, usinage laser ou découpe par jet d'eau. Le ressort présente avantageusement, avant mise en œuvre de cette étape, un ruban élastique de hauteur constante H.The second portion can be obtained by implementing a step of machining the spring at its inner end, for example by mechanical cutting, grinding, stamping, laser machining or water jet cutting. The spring advantageously has, before implementation of this step, an elastic band of constant height H.

Dans le premier mode de réalisation du barillet horloger, un arbre de barillet est décrit ci-après en référence à la figure 1. Il comprend une rainure 13 s'étendant sur une circonférence de l'arbre et cette rainure est destinée à recevoir le ressort de barillet 2.In the first embodiment of the watch barrel, a barrel shaft is described below with reference to figure 1 . It comprises a groove 13 extending over a circumference of the shaft and this groove is intended to receive the barrel spring 2.

L'arbre est un arbre plein. De part et d'autre de la rainure, il comprend préférentiellement des épaulements 12 et 14 et des portées 11 et 15. La portion cylindrique 11 et la portion cylindrique 15 permettent la rotation sur l'arbre de barillet du tambour et du couvercle de barillet. L'épaulement 12 permet d'arrêter axialement le tambour. L'épaulement 14 permet d'arrêter axialement le couvercle. Les deux épaulements permettent d'assurer l'ébat de l'enveloppe du barillet (couvercle et tambour assemblés) par rapport à l'arbre.The tree is a solid tree. On either side of the groove, it preferably comprises shoulders 12 and 14 and bearing surfaces 11 and 15. The cylindrical portion 11 and cylindrical portion 15 allow rotation on the barrel shaft of the drum and of the barrel cover. The shoulder 12 makes it possible to axially stop the drum. The shoulder 14 makes it possible to axially stop the cover. The two shoulders allow the casing of the barrel (cover and drum assembled) to swing away from the shaft.

La rainure présente avantageusement une hauteur comparable à la deuxième hauteur h du ressort. Ainsi, la rainure comprend au moins une portion dont la hauteur est inférieure à la hauteur de la partie active du ressort de barillet et la deuxième portion 52 du ressort peut être enroulée sur l'arbre dans la rainure. De préférence, au niveau de la rainure, la section de l'arbre a une forme de révolution centrée sur l'axe de l'arbre. Cependant, la section de l'arbre peut aussi avoir une forme d'enveloppe de spirale dont le pas est égal ou sensiblement égal à l'épaisseur du ressort. La longueur de la deuxième portion peut correspondre à la longueur d'une spire complète enroulée sur l'arbre. Complémentairement ou alternativement, la rainure présente une profondeur au moins localement supérieure ou égale à l'épaisseur du ressort de barillet, voire une profondeur supérieure ou égale à l'épaisseur du ressort de barillet sur toute l'étendue de la rainure, voire une profondeur égale ou sensiblement égale à l'épaisseur du ressort de barillet.The groove advantageously has a height comparable to the second height h of the spring. Thus, the groove comprises at least a portion whose height is less than the height of the active part of the barrel spring and the second portion 52 of the spring can be wound on the shaft in the groove. Preferably, at the level of the groove, the section of the shaft has a shape of revolution centered on the axis of the shaft. However, the section of the shaft can also have the shape of a spiral envelope, the pitch of which is equal or substantially equal to the thickness of the spring. The length of the second portion may correspond to the length of a complete turn wound on the shaft. Complementarily or alternatively, the groove has a depth at least locally greater than or equal to the thickness of the barrel spring, or even a depth greater than or equal to the thickness of the barrel spring over the entire extent of the groove, or even a depth equal or substantially equal to the thickness of the barrel spring.

La rainure peut s'étendre seulement sur une partie de la circonférence de l'arbre. Notamment, la rainure peut s'étendre sur plus de 180° autour de l'axe de l'arbre de barillet. La rainure peut aussi s'étendre de préférence sur toute la circonférence de l'arbre de barillet. Dans les deux cas, le rayon de fond de rainure peut être évolutif, c'est-à-dire que le rayon de fond de rainure au niveau d'un point de fond de rainure peut avoir une valeur variant avec la position circonférentielle de ce point.The groove can extend only part of the circumference of the shaft. In particular, the groove can extend over more than 180 ° around the axis of the barrel shaft. The groove may also preferably extend over the entire circumference of the barrel shaft. In both cases, the groove bottom radius can be scalable, i.e. the groove bottom radius at a groove bottom point can have a value varying with the circumferential position of this point.

L'arbre comprend, dans la rainure, en particulier au fond de la rainure, un deuxième élément d'accrochage 113a du ressort de barillet, le deuxième élément d'accrochage étant destiné à coopérer avec le premier élément d'accrochage 51 prévu sur le ressort de barillet.The shaft comprises, in the groove, in particular at the bottom of the groove, a second hooking element 113a of the barrel spring, the second hooking element being intended to cooperate with the first hooking element 51 provided on the barrel spring.

Le deuxième élément d'accrochage comprend dans le cas des figures 1 à 3 une conformation en creux comprenant des bords 13b et 13c destinés à coopérer avec la conformation 51a, 51b trapézoïdale du ressort. En effet, les bords 13b et 13c viennent en contact contre les bords 51a et 51b. Du fait de la forme trapézoïdale et en fonction de l'angle des bords 13b et 13c, il peut même se produire un coincement de l'extrémité du ressort sur l'arbre. Les formes trapézoïdales 13a et 51 sont de préférence orientées selon la circonférence.The second attachment element comprises, in the case of figures 1 to 3 a hollow conformation comprising edges 13b and 13c intended to cooperate with the trapezoidal conformation 51a, 51b of the spring. Indeed, the edges 13b and 13c come into contact against the edges 51a and 51b. Due to the trapezoidal shape and depending on the angle of the edges 13b and 13c, there may even be jamming of the end of the spring on the shaft. The trapezoidal shapes 13a and 51 are preferably oriented along the circumference.

La deuxième portion 52 du ressort est de préférence une partie non-active, c'est-à-dire une partie qui ne contribue pas ou très peu au couple développé par le ressort, c'est-à-dire une partie non sollicitée ou peu sollicitée mécaniquement en flexion.The second portion 52 of the spring is preferably a non-active part, that is to say a part which does not contribute or very little to the torque developed by the spring, that is to say an unsolicited part or little mechanically stressed in bending.

La rainure présente ainsi de préférence, en son fond, un diamètre inférieur au diamètre extérieur de l'épaulement 12 permettant d'arrêter le tambour du barillet et/ou inférieur au diamètre extérieur de l'épaulement 14 permettant d'arrêter le couvercle du barillet.The groove thus preferably has, at its bottom, a diameter less than the outside diameter of the shoulder 12 making it possible to stop the drum of the barrel and / or less than the outside diameter of the shoulder 14 making it possible to stop the cover of the barrel. .

De part et d'autre de la rainure 13, des portions 16 et 17 (ou bondes) sont prévues pour recevoir les spires enroulées de la première portion (50) de ressort.On either side of the groove 13, portions 16 and 17 (or bungs) are provided to receive the wound turns of the first portion (50) of the spring.

Les premier et deuxième éléments d'accrochage ont été conçus pour réduire au maximum le diamètre de bonde. Ainsi, on peut augmenter efficacement le nombre de tours de développement du ressort et donc la réserve de marche du barillet, sans augmenter le volume extérieur du barillet ni modifier le rapport d'engrenage. Cette réduction est donc réalisée en pratiquant une gorge ou rainure sur l'arbre qui présente avantageusement une hauteur comparable à la deuxième hauteur h du ressort, avec un dégagement de diamètre inférieur à celui des épaulements nécessaires au maintien du tambour et couvercle. L'extrémité intérieure du ressort est découpée avec une hauteur de bande inférieure sur une longueur à peu près équivalente à celle de la première spire, afin d'augmenter le nombre de tours d'enroulement et donc la réserve de marche.The first and second hooking elements have been designed to reduce the bung diameter as much as possible. Thus, we can effectively increase the number of turns of spring development and therefore the power reserve of the barrel, without increasing the external volume of the barrel or modifying the gear ratio. This reduction is therefore achieved by making a groove or groove on the shaft which advantageously has a height comparable to the second height h of the spring, with a clearance of diameter smaller than that of the shoulders necessary to maintain the drum and cover. The inner end of the spring is cut with a lower band height over a length roughly equivalent to that of the first turn, in order to increase the number of winding turns and therefore the power reserve.

Pour diminuer le diamètre de bonde, la gorge ou rainure est usinée à l'intérieur de l'arbre et comprend une partie d'accroche, notamment un dégagement servant de partie femelle. La forme de l'extrémité interne du ressort doit être adaptée en conséquence, par le découpage d'une « patte » de hauteur plus faible que le reste de la lame qui permet à la première spire de venir s'insérer dans la rainure, avec une partie terminale en forme de queue d'aronde qui fait office de partie mâle. Par martelage de cette extrémité interne, ou autre technique appropriée, on confectionne un coquillon dont le premier tour a un diamètre intérieur plus faible que la rainure usinée à l'intérieur de l'arbre. Ceci permet de favoriser l'accroche par une action de serrage de la bande sur l'arbre. Le ressort est coquillonné sur un tour, dans le cas particulier représenté sur une hauteur réduite à 0.9 mm par rapport à la hauteur de la première portion de 1.46 mm. Ce coquillon vient se plaquer contre la rainure usinée à l'intérieur de l'arbre, munie du dégagement 13a pour l'accroche de la queue d'aronde 51, 51a, 51b du ressort. En tournant, on bloque la rotation du ressort sur l'arbre grâce au dégagement et à son angle de dépouille. Après le premier tour, la portion de ressort est active et sa hauteur passe à 1.46 mm.To reduce the bung diameter, the groove or groove is machined inside the shaft and includes a hooking part, in particular a recess serving as a female part. The shape of the internal end of the spring must be adapted accordingly, by cutting a "tab" of lower height than the rest of the blade which allows the first turn to fit into the groove, with a terminal part in the form of a dovetail which acts as a male part. By hammering this internal end, or another suitable technique, a shell is made, the first turn of which has an internal diameter smaller than the groove machined inside the shaft. This makes it possible to promote the grip by a clamping action of the band on the shaft. The spring is shelled over one turn, in the particular case shown over a height reduced to 0.9 mm with respect to the height of the first portion of 1.46 mm. This shell is pressed against the groove machined inside the shaft, provided with the clearance 13a for the attachment of the dovetail 51, 51a, 51b of the spring. By turning, the rotation of the spring is blocked on the shaft thanks to the clearance and its clearance angle. After the first turn, the spring portion is active and its height changes to 1.46 mm.

Cette solution permet tout d'abord de réduire fortement le diamètre de bonde. Par rapport à un arbre de barillet standard pour calibre dame (diamètre du mouvement de 20 mm environ), le diamètre de bonde passe de 1.85 mm à 1.39 mm, soit une diminution de 25%.This solution first of all makes it possible to greatly reduce the diameter of the plug. Compared to a standard barrel shaft for lady's caliber (movement diameter of approximately 20 mm), the plug diameter goes from 1.85 mm to 1.39 mm, ie a reduction of 25%.

Cette diminution du diamètre de bonde permet d'augmenter les performances du barillet, et en particulier l'autonomie ou la réserve de marche. En effet, pour une même longueur du ressort, plus le diamètre de bonde est petit, plus le nombre de tours possible en enroulant la lame est élevé. Plus le nombre de spires que le ressort forme sur l'arbre à l'état armé est élevé pour une longueur donnée, plus l'autonomie sera élevée. En fait, l'effet d'une diminution du diamètre de bonde sur l'augmentation du nombre de tours est approximativement de degré 2.This reduction in the bung diameter makes it possible to increase the performance of the barrel, and in particular the autonomy or the power reserve. Indeed, for the same length of the spring, the smaller the diameter of the plug, the greater the number of turns possible by winding the blade. The greater the number of turns that the spring forms on the shaft in the armed state for a given length, the greater the autonomy will be. In fact, the effect of a decrease in the bung diameter on the increase in the number of turns is approximately degree 2.

De plus, la fabrication de l'arbre est facilitée grâce à la suppression du crochet ou de l'ergot et au passage d'une bonde à diamètre évolutif à une gorge de révolution usinable sur un tour. L'usinage du dégagement pour l'accroche de l'extrémité se fait simplement par passage d'une fraise d'angle (ou fraise en queue d'aronde). Les appuis radiaux et longitudinaux du couvercle et du tambour se font comme traditionnellement sur l'arbre et l'assemblage du barillet au sein du mouvement d'horlogerie reste traditionnel. Plus particulièrement, l'ébat longitudinal du tambour et du couvercle est défini par les épaulements 12 et 14 de l'arbre, tandis que l'ébat longitudinal du barillet relativement aux ébauches s'opère également par des épaulements, en l'occurrence par les épaulements adjacents aux épaulements 12 et 14.In addition, the manufacture of the shaft is facilitated thanks to the elimination of the hook or the lug and the passage of a plug with an evolving diameter to a groove of revolution machinable on a lathe. The machining of the clearance for the hooking of the end is done simply by passing an angle milling cutter (or dovetail milling cutter). The radial and longitudinal supports of the cover and of the drum are done as traditionally on the shaft and the assembly of the barrel within the clockwork movement remains traditional. More particularly, the longitudinal bearing of the drum and of the cover is defined by the shoulders 12 and 14 of the shaft, while the longitudinal bearing of the barrel relative to the blanks is also effected by the shoulders, in this case by the shoulders adjacent to shoulders 12 and 14.

Les éléments d'accrochage présentent aussi des avantages indéniables pour assembler le ressort sur l'arbre de barillet. Le rayon de courbure de la spire intérieure du ressort avant montage est toujours inférieur au rayon de bonde, de façon à garantir un bon plaquage et serrage du ressort sur l'arbre et une fixation adéquate. Avec une construction traditionnelle, l'extrémité inférieure du ressort doit être ouverte une première fois pour franchir la portée et placer le ressort sur la bonde. Il faut ensuite une deuxième manipulation d'ouverture du ressort pour l'écarter de l'arbre et lui permettre ainsi de passer par-dessus l'ergot en le glissant vers le bas. De plus, vu le manque de guidage vertical de la lame du ressort, le coquillon doit être placé précisément en regard de l'ergot pour assurer une bonne accroche du ressort sur l'arbre.The hooking elements also have undeniable advantages for assembling the spring on the barrel shaft. The radius of curvature of the inner coil of the spring before assembly is always less than the bung radius, so as to guarantee a good plating and tightening of the spring on the shaft and adequate fixing. With a traditional construction, the lower end of the spring must be opened a first time to cross the span and place the spring on the bung. It then takes a second manipulation of opening the spring to move it away from the shaft and thus allow it to pass over the lug by sliding it down. In addition, given the lack of vertical guidance of the leaf of the spring, the shell must be placed precisely opposite the lug to ensure good grip of the spring on the shaft.

Avec le ressort et l'arbre selon l'invention, il suffit d'écarter le ressort pour passer la portée de la bonde, puis de glisser le ressort vers le bas. Le positionnement vertical est assuré par l'insertion de la portion de hauteur réduite dans la rainure 13. Pour réaliser l'accroche, on effectue une rotation de l'arbre dans le sens d'entraînement du ressort (armage, remontage), et l'extrémité en queue d'aronde vient se placer et s'accrocher au dégagement 13a prévu à cet effet, de façon fiable et reproductible quelle que soit l'orientation initiale de l'extrémité du ressort par rapport à l'accroche sur l'arbre. L'assemblage du ressort sur l'arbre en est ainsi grandement facilité. Ainsi, une fixation du type queue d'aigle ou queue d'aronde permet de venir positionner correctement un ressort coquillonné sans autre manipulation que d'ouvrir légèrement la spire ou l'enroulement interne du ressort formé pour passer la portée 12 ou 14, puis de venir effectuer une rotation de l'arbre pour venir encliqueter la portion trapézoïdale du ressort dans la partie correspondante de l'arbre.With the spring and the shaft according to the invention, it suffices to spread the spring to pass the scope of the bung, then to slide the spring downwards. The vertical positioning is ensured by the insertion of the portion of reduced height in the groove 13. To achieve the attachment, the shaft is rotated in the direction of the spring drive (winding, reassembly), and the the dovetail end is placed and hooked to the clearance 13a provided for this purpose, reliably and reproducibly regardless of the initial orientation of the end of the spring relative to the hook on the shaft . The assembly of the spring on the shaft is thus greatly facilitated. Thus, a fixing of the eagle tail or dovetail type makes it possible to correctly position a shell spring without any other manipulation than to slightly open the coil or the internal winding of the formed spring to pass the bearing 12 or 14, then to rotate the shaft to engage the trapezoidal portion of the spring in the corresponding part of the shaft.

Un deuxième mode de réalisation d'un barillet horloger comprenant un arbre de barillet et un ressort de barillet selon l'invention est décrit ci-après en référence aux figures 4 et 5.A second embodiment of a watch barrel comprising a barrel shaft and a barrel spring according to the invention is described below with reference to figures 4 and 5 .

Dans l'illustration de ce deuxième mode de réalisation, les éléments identiques, similaires ou ayant la même fonction que ceux du premier mode de réalisation, présentent des références numériques auxquelles on a ajouté une centaine. Ainsi, par exemple, l'arbre du deuxième mode de réalisation et le ressort du deuxième mode de réalisation sont référencés « 101 » et « 102 » alors que l'arbre du premier mode de réalisation et le ressort du premier mode de réalisation sont référencés « 1 » et « 2 ».In the illustration of this second embodiment, the elements which are identical, similar or having the same function as those of the first embodiment, have reference numerals to which about a hundred have been added. Thus, for example, the shaft of the second embodiment and the spring of the second embodiment are referenced "101" and "102" while the shaft of the first embodiment and the spring of the first embodiment are referenced " 1 and 2 ".

Le deuxième mode de réalisation diffère du premier mode de réalisation uniquement par la réalisation du premier élément d'accrochage 151 et du deuxième élément d'accrochage, le premier élément d'accrochage et le deuxième élément d'accrochage étant destinés à coopérer l'un avec l'autre.The second embodiment differs from the first embodiment only by making the first hooking element 151 and the second hooking element, the first hooking element and the second hooking element being intended to cooperate with one another. with the other.

Dans le deuxième mode de réalisation, un ergot ou crochet 113a est réalisé sur l'arbre au fond de la rainure 113. La réalisation d'un tel ergot ou crochet est relativement compliquée.In the second embodiment, a lug or hook 113a is produced on the shaft at the bottom of the groove 113. The production of such a lug or hook is relatively complicated.

L'ergot ou le crochet coopère avec un pigeonneau ou une ouverture 151 réalisée à l'extrémité 105 du ressort. L'ouverture a par exemple une forme sensiblement rectangulaire. L'ergot ou le crochet est conformé pour être inséré dans le pigeonneau.The lug or the hook cooperates with a squab or an opening 151 made at the end 105 of the spring. The opening has for example a substantially rectangular shape. The lug or hook is shaped to be inserted into the squab.

L'arbre pivote dans une pierre à son extrémité supérieure. Comme représenté à la figure 4, le tambour 103a pivote quant à lui sur l'arbre au niveau de la portion 111 et de la portée 112, tandis que le couvercle 103b fait de même sur la portion 115 et la portée 114.The tree pivots in a stone at its upper end. As shown in the figure 4 , the drum 103a pivots on the shaft at the level of the portion 111 and the bearing 112, while the cover 103b does the same on the portion 115 and the bearing 114.

Un troisième mode de réalisation d'un barillet horloger comprenant un arbre de barillet et un ressort de barillet selon l'invention est décrit ci-après en référence aux figures 6 et 7.A third embodiment of a watch barrel comprising a barrel shaft and a barrel spring according to the invention is described below with reference to figures 6 and 7 .

Dans l'illustration de ce troisième mode de réalisation, les éléments identiques, similaires ou ayant la même fonction que ceux du premier mode de réalisation, présentent des références numériques auxquelles on a ajouté deux centaines. Ainsi, par exemple, l'arbre du troisième mode de réalisation et le ressort du troisième mode de réalisation sont référencés « 201 » et « 202 » alors que l'arbre du premier mode de réalisation et le ressort du premier mode de réalisation sont référencés « 1 » et « 2 ».In the illustration of this third embodiment, elements which are identical, similar or having the same function as those of the first embodiment, have reference numerals to which two hundred have been added. Thus, for example, the shaft of the third embodiment and the spring of the third embodiment are referenced "201" and "202" while the shaft of the first embodiment and the spring of the first embodiment are referenced " 1 and 2 ".

Le troisième mode de réalisation diffère du premier mode de réalisation uniquement par la réalisation du premier élément d'accrochage 251 et du deuxième élément d'accrochage 213a, le premier élément d'accrochage et le deuxième élément d'accrochage étant destinés à coopérer l'un avec l'autre.The third embodiment differs from the first embodiment only by the realization of the first hooking element 251 and the second hooking element 213a, the first hooking element and the second hooking element being intended to cooperate with the one with the other.

Dans le troisième mode de réalisation, une découpe 213a, comme un alésage, est réalisée dans l'arbre au fond de la rainure 213. Cette découpe est par exemple réalisée perpendiculairement à l'axe de l'arbre. La découpe coopère avec une goupille 251 fixée à l'extrémité 205 du ressort. La goupille peut notamment être rivetée sur le ressort.In the third embodiment, a cutout 213a, such as a bore, is made in the shaft at the bottom of the groove 213. This cutout is for example made perpendicular to the axis of the shaft. The cutout cooperates with a pin 251 fixed to the end 205 of the spring. The pin can in particular be riveted to the spring.

Cette solution nécessite un élément additionnel mais permet de simplifier la réalisation de l'arbre.This solution requires an additional element but makes it possible to simplify the production of the shaft.

Un quatrième mode de réalisation d'un barillet horloger comprenant un arbre de barillet et un ressort de barillet selon l'invention est décrit ci-après en référence aux figures 8 et 9.A fourth embodiment of a watch barrel comprising a barrel shaft and a barrel spring according to the invention is described below with reference to figures 8 and 9 .

Dans l'illustration de ce quatrième mode de réalisation, les éléments identiques, similaires ou ayant la même fonction que ceux du premier mode de réalisation, présentent des références numériques auxquelles on a ajouté trois centaines. Ainsi, par exemple, l'arbre du quatrième mode de réalisation et le ressort du quatrième mode de réalisation sont référencés « 301 » et « 302 » alors que l'arbre du premier mode de réalisation et le ressort du premier mode de réalisation sont référencés « 1 » et « 2 ».In the illustration of this fourth embodiment, the elements which are identical, similar or having the same function as those of the first embodiment, show reference numerals to which three hundred have been added. Thus, for example, the shaft of the fourth embodiment and the spring of the fourth embodiment are referenced "301" and "302" while the shaft of the first embodiment and the spring of the first embodiment are referenced " 1 and 2 ".

Le quatrième mode de réalisation diffère du premier mode de réalisation uniquement par la réalisation du premier élément d'accrochage 351 et du deuxième élément d'accrochage 313a, le premier élément d'accrochage et le deuxième élément d'accrochage étant destinés à coopérer l'un avec l'autre.The fourth embodiment differs from the first embodiment only by the realization of the first hooking element 351 and the second hooking element 313a, the first hooking element and the second hooking element being intended to cooperate with the one with the other.

Dans le quatrième mode de réalisation, une entaille 313a, comme une entaille radiale, est réalisée dans l'arbre au fond de la rainure 313.In the fourth embodiment, a notch 313a, like a radial notch, is made in the shaft at the bottom of the groove 313.

L'entaille coopère avec un pliage 351 réalisé à l'extrémité 305 du ressort.The notch cooperates with a fold 351 made at the end 305 of the spring.

Ainsi, dans les différents modes de réalisation, le deuxième élément d'accrochage comprend une protubérance, par exemple un crochet, ou une conformation particulière de la rainure ou un évidement dans la rainure et le premier élément d'accrochage comprend une ouverture ou une conformation particulière de l'extrémité intérieure du ressort ou une goupille, notamment une goupille rivetée.Thus, in the various embodiments, the second hooking element comprises a protuberance, for example a hook, or a particular conformation of the groove or a recess in the groove and the first hooking element comprises an opening or a conformation. particular of the inner end of the spring or a pin, in particular a riveted pin.

Dans les différents modes de réalisation, l'extrémité intérieure du ressort forme un enroulement, notamment un diamètre, présentant des dimensions telles que l'enroulement est déformé lorsqu'il est monté sur l'arbre.In the various embodiments, the inner end of the spring forms a coil, in particular a diameter, having dimensions such that the coil is deformed when it is mounted on the shaft.

Dans les différents modes de réalisation, le ressort peut être fixé à l'arbre par clipsage, coinçage, ou de manière traditionnelle avec un ergot. Préférentiellement, l'accrochage se fait par l'intermédiaire d'une patte (forme mâle) découpé à l'extrémité interne de la lame ressort, qui est retenu par une forme femelle correspondante usinée à l'intérieur de l'arbre. Un tel système comporte donc une inversion des parties mâle et femelle de la fixation par rapport à la solution standard : la partie mâle est déplacée de l'arbre sur le ressort.In the various embodiments, the spring can be fixed to the shaft by clipping, wedging, or in the traditional manner with a lug. Preferably, the hooking is done by means of a tab (male form) cut from the internal end of the leaf spring, which is retained by a corresponding female form machined inside the shaft. Such a system therefore comprises an inversion of the male and female parts of the binding with respect to the standard solution: the male part is moved from the shaft onto the spring.

Le ressort de l'invention peut particulièrement être réalisé en un matériau à haute résistance mécanique, comme par exemple un alliage métallique amorphe décrit dans la demande WO2012010941 . Néanmoins, des alliages métalliques hautes performances traditionnels comme des super-alliages à base de cobalt (Nivaflex ou autre) ou des alliages à haute teneur en azote (alliages CrMnN comme décrits dans le document CH703796 ) peuvent aussi être utilisés. Le dimensionnement du diamètre de bonde devra cependant tenir compte des caractéristiques de déformation plastique propres à l'état de chaque matière considérée. Ainsi, le gain réalisé grâce à l'invention peut être plus ou moins limité selon la matière choisie (et son état d'écrouissage pour les matières polycristallines). Pour cette raison, l'augmentation de performances constatée avec un barillet selon l'invention sera probablement plus marquée avec un ressort du type décrit dans la demande WO2012010941 ou dans le document CH703796 qu'avec un ressort de type Nivaflex.The spring of the invention can in particular be made of a material with high mechanical strength, such as for example an amorphous metal alloy described in the application. WO2012010941 . However, traditional high-performance metal alloys such as cobalt-based superalloys (Nivaflex or other) or alloys with a high nitrogen content (CrMnN alloys as described in the document CH703796 ) can also be used. The dimensioning of the bung diameter must however take into account the plastic deformation characteristics specific to the state of each material considered. Thus, the gain achieved by virtue of the invention can be more or less limited depending on the material chosen (and its hardening state for polycrystalline materials). For this reason, the increase in performance observed with a barrel according to the invention will probably be more marked with a spring of the type described in the application. WO2012010941 or in the document CH703796 only with a Nivaflex type spring.

De plus, en fonction de l'alliage utilisé pour le ressort, il est aussi possible de diminuer le diamètre de gorge de façon à ce que la patte 52 de l'extrémité interne du ressort fasse plus qu'un tour sur l'arbre. Dans ce cas, seul le premier tour sur l'arbre est inactif, et la portion active du ressort comprend aussi une partie de hauteur réduite pouvant s'insérer dans la gorge de l'arbre.In addition, depending on the alloy used for the spring, it is also possible to reduce the diameter of the groove so that the tab 52 of the inner end of the spring makes more than one turn on the shaft. In this case, only the first turn on the shaft is inactive, and the active portion of the spring also comprises a portion of reduced height which can be inserted into the groove of the shaft.

Ainsi, dans une variante applicable notamment aux différents modes de réalisation décrits ci-dessus, il peut être réalisé, sur l'arbre 401, comme représenté à la figure 10, plusieurs rainures, notamment deux rainures. Ainsi, il est possible de loger plus d'un enroulement de ressort, notamment deux enroulements de ressort, dans ces rainures. Dans ce cas, chaque enroulement de ressort destiné à être logé dans ces rainures présente une hauteur différente. Les hauteurs des enroulements peuvent être de plus en plus petites à mesure qu'on s'approche de l'extrémité interne du ressort. Ainsi, il est possible de loger un enroulement et, de préférence, plus d'un enroulement, dans un encombrement radial défini par le diamètre 16, 116, 216 ou 316.Thus, in a variant applicable in particular to the various embodiments described above, it can be produced, on the shaft 401, as shown in figure 10 , several grooves, in particular two grooves. Thus, it is possible to accommodate more than one spring winding, in particular two spring windings, in these grooves. In this case, each spring winding intended to be housed in these grooves has a different height. The heights of the windings can be smaller and smaller as one approaches the inner end of the spring. Thus, it is possible to accommodate a winding and, preferably, more than one winding, in a radial space defined by the diameter 16, 116, 216 or 316.

Autrement dit, l'arbre peut présenter une rainure 413 permettant de loger dans celle-ci plus d'un enroulement (ou tour) complet du ressort. Ainsi, un enroulement ou plus du ressort peut être logé dans la rainure sans que cet enroulement dépasse d'un encombrement radial défini par le diamètre 16, 116, 216 ou 316. Avantageusement, la rainure peut être étagée. Dans ce cas de rainure étagée, on peut voir la rainure comme constituant plusieurs rainures de hauteurs différentes, réalisées les unes au fond des autres. Ce cas de rainure étagée permet de loger une étendue de plus d'un enroulement du ressort dans la rainure sans que cette étendue de ressort dépasse d'un encombrement radial défini par le diamètre 16, 116, 216 ou 316. Dans ce cas, la profondeur p de la rainure est supérieure à l'épaisseur du ressort.In other words, the shaft may have a groove 413 making it possible to accommodate therein more than one complete winding (or turn) of the spring. Thus, one or more winding of the spring can be housed in the groove without this winding protruding by a radial size defined by the diameter 16, 116, 216 or 316. Advantageously, the groove can be stepped. In this case of a stepped groove, the groove can be seen as constituting several grooves of different heights, made one at the bottom of the other. This stepped groove case makes it possible to accommodate an extent of more than one coil of the spring in the groove without this spring extent projecting from a radial space defined by the diameter 16, 116, 216 or 316. In this case, the depth p of the groove is greater than the thickness of the spring.

Une comparaison d'un barillet selon le premier mode de réalisation par rapport à un barillet standard a été effectuée. Les résultats sont consignés dans le tableau suivant. Type Tours de développement Autonomie barillet [h] Barillet standard, ressort Nivaflex 10.0 50 Barillet standard, ressort en alliage amorphe 12.0 60 Nouvelle accroche, ressort en amorphe 14.2 71 A comparison of a barrel according to the first embodiment with respect to a standard barrel has been carried out. The results are shown in the following table. Type Development towers Barrel autonomy [h] Standard barrel, Nivaflex spring 10.0 50 Standard barrel, amorphous alloy spring 12.0 60 New grip, amorphous spring 14.2 71

Le ressort de barillet et/ou l'arbre de barillet et/ou le barillet de l'invention est particulièrement adapté pour tirer parti des propriétés mécaniques exceptionnelles des alliages amorphes métalliques. En effet, le barillet selon l'invention permet un gain de deux tours de développement avec un ressort en alliage amorphe métallique tel que décrit dans la demande WO2012010941 . La combinaison du barillet selon l'invention et d'un alliage métallique amorphe permet de gagner dans l'exemple ci-dessus 40% d'autonomie, avec un encombrement du barillet identique. Pour ce test, les ressorts ont été réalisés avec une longueur de lame et une bride identiques. Cependant, d'autres facteurs comme la bride, la forme du coquillon et la longueur de lame entrent en ligne de compte et le système pourrait être optimisé en modifiant des paramètres comme la longueur de lame ou les caractéristiques de la bride.The barrel spring and / or the barrel shaft and / or the barrel of the invention is particularly suitable for taking advantage of the exceptional mechanical properties of amorphous metal alloys. Indeed, the barrel according to the invention allows a saving of two turns of development with a spring in amorphous metal alloy as described in the application. WO2012010941 . The combination of the barrel according to the invention and of an amorphous metal alloy makes it possible to gain in the above example 40% autonomy, with an identical size of the barrel. For this test, the springs were made with the same blade length and flange. However, other factors like flange, shell shape and blade length come into play and the system could be optimized by changing parameters like blade length or flange characteristics.

Dans les différents modes de réalisation et variantes décrits plus haut, la hauteur maximale h' du premier élément d'accrochage peut être avantageusement inférieure à la hauteur H de la première portion. La hauteur maximale h' du premier élément d'accrochage peut également être avantageusement inférieure à la distance entre les portées 12 et 14 de l'arbre de barillet qui définissent la partie sur laquelle la première portion du ressort vient appuyer. De plus, la hauteur maximale h' du premier élément d'accrochage peut être avantageusement supérieure à la hauteur h de la deuxième portion du ressort, et avantageusement supérieure à la hauteur de la rainure 13 de l'arbre de barillet. La hauteur du ressort sur le premier tour, extrémité y comprise, peut aussi être avantageusement inférieure à la hauteur du ressort sur sa partie extérieure (en d'autres termes, max(h',h)<H où max(a, b) désigne la valeur maximale des deux paramètres a, b). Ces différentes caractéristiques, prises séparément ou en combinaison, permettent de maximiser la hauteur disponible pour le ressort dans une construction de barillet avec couvercle et tambour.In the various embodiments and variants described above, the maximum height h ′ of the first attachment element can advantageously be less than the height H of the first portion. The maximum height h 'of the first fastening element can also be advantageously less than the distance between the bearing surfaces 12 and 14 of the barrel shaft which define the part on which the first portion of the spring comes to rest. In addition, the maximum height h 'of the first fastening element can advantageously be greater than the height h of the second portion of the spring, and advantageously greater than the height of the groove 13 of the barrel shaft. The height of the spring on the first turn, including the end, can also be advantageously less than the height of the spring on its outer part (in other words, max (h ', h) <H where max (a, b) denotes the maximum value of the two parameters a, b). These different characteristics, taken separately or in combination, make it possible to maximize the height available for the spring in a barrel construction with cover and drum.

Dans les différents modes de réalisation et variantes décrits plus haut, la profondeur p de la rainure est de préférence égale ou sensiblement égale à l'épaisseur du ressort. La profondeur de la rainure peut être supérieure à l'épaisseur du ressort.In the various embodiments and variants described above, the depth p of the groove is preferably equal or substantially equal to the thickness of the spring. The depth of the groove may be greater than the thickness of the spring.

Dans le cas d'un premier élément d'accrochage en forme de queue d'aigle ou d'aronde tel que décrit dans le premier mode de réalisation, le premier élément d'accrochage comprend une partie trapézoïdale ou sensiblement trapézoïdale. Cette partie trapézoïdale peut présenter une hauteur diminuant à mesure qu'on s'éloigne de l'extrémité interne du ressort. Par exemple, dans cette direction, la partie trapézoïdale peut présenter une hauteur évoluant de la hauteur maximale h' à la hauteur h. Ainsi, le ressort est tel qu'il respecte la condition suivante : H>h'>hIn the case of a first hooking element in the form of an eagle's tail or dovetail as described in the first embodiment, the first hooking element comprises a trapezoidal or substantially trapezoidal part. This trapezoidal part may have a height which decreases as one moves away from the inner end of the spring. For example, in this direction, the trapezoidal part may have a height varying from the maximum height h 'to the height h. Thus, the spring is such that it respects the following condition: H> h '> h

Cette conformation du premier élément d'accrochage permet au ressort de venir se fixer dans la rainure par simple rotation de l'arbre par rapport au ressort. La rainure destinée à recevoir le ressort présente, comme deuxième élément d'accrochage, un logement ou une conformation ou un évidement complémentaire ou sensiblement complémentaire au premier élément d'accrochage.This conformation of the first fastening element allows the spring to come to be fixed in the groove by simple rotation of the shaft relative to the spring. The groove intended to receive the spring has, as a second hooking element, a housing or a conformation or a recess complementary or substantially complementary to the first hooking element.

Dans les différents modes de réalisation et variantes décrits plus haut, la deuxième hauteur h peut évoluer le long de la deuxième portion.In the various embodiments and variants described above, the second height h can evolve along the second portion.

Claims (12)

  1. A timepiece barrel (4) comprising:
    a barrel spring (2; 102; 202; 302) including:
    - an interior end (5; 105; 205; 305) and an exterior end,
    - a first portion (50, 150, 250, 350) having a first height (H),
    - a second portion (52; 152; 252; 352) having a second height (h) less than the first height (H) and situated near the interior end (5; 105; 205; 305), and
    - in the second portion, for example at the interior end, a first attachment element (51; 151; 251; 351) adapted to be fixed to a barrel shaft, the second portion being intended to be inserted in a groove (13, 113, 213, 313) extending circumferentially on the barrel shaft,
    and
    a shaft (1; 101; 201; 301; 401) for a clock movement barrel (4), including the groove (13; 113; 213; 313) extending round a circumference of the shaft and intended to receive a barrel spring (2; 102; 202; 302), the groove having a depth (p) equal or substantially equal to the thickness of the barrel spring.
  2. The barrel as claimed in the preceding claim, wherein the first attachment element (51; 151; 251; 351) has a maximum height (h') such that max(h', h) < H, in particular such that H > h' > h and/or wherein the first attachment element (51; 151; 251; 351) is intended to cooperate with a second attachment element (13a; 113a; 213a; 313a) on the shaft and/or wherein the first attachment element has a trapezoidal or substantially trapezoidal conformation (51a, 51b).
  3. The barrel as claimed in any one of the preceding claims, wherein it is made from a high-performance metal alloy, notably an amorphous metal alloy or a high-nitrogen alloy.
  4. The barrel as claimed in one of the preceding claims, wherein the groove is a staggered groove (413) and/or wherein the groove has a height comparable to the second height of the spring.
  5. The barrel as claimed in any one of the preceding claims, wherein the groove extends partly round the shaft, notably more than 180° round the axis of the barrel shaft, in particular round all the circumference of the barrel shaft.
  6. The barrel as claimed in any one of the preceding claims, wherein the groove includes at least one portion the height of which is less than the height of an active part of the barrel spring.
  7. The barrel as claimed in any one of the preceding claims, wherein the grove has a depth (p) at least locally greater than or equal to the thickness of the barrel spring or even a depth greater than or equal to the thickness of the barrel spring over all the extent of the groove.
  8. The barrel as claimed in any one of the preceding claims , wherein it includes in the groove, in particular at the bottom of the groove, a second attachment element (13a; 113a; 213a; 313a) for attaching the barrel spring, the second attachment element being intended to cooperate with a first attachment element (51; 151; 251; 351) on the barrel spring.
  9. The barrel as claimed in the preceding claim, wherein the second attachment element includes a protuberance, for example a hook (131a), or a particular conformation (13b, 13c; 213a; 313a) of the groove or a recess (213a; 313a) in the groove.
  10. The barrel as claimed in the preceding claim, wherein the particular conformation of the groove includes a circumferentially oriented trapezoidal portion of the groove.
  11. A clock movement including a barrel as claimed in one of the preceding claims.
  12. A watch, in particular a wristwatch, including a barrel as claimed in one of the claims 1 to 10 or a clock movement as claimed in claim 11.
EP13713910.1A 2012-04-04 2013-04-04 Barrel including a barrel spring and a barrel arbour Active EP2834712B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP21206061.0A EP3968093A1 (en) 2012-04-04 2013-04-04 Arbor for a clock movement, barrel spring and barrel including such a spring and/or such an arbor
EP13713910.1A EP2834712B1 (en) 2012-04-04 2013-04-04 Barrel including a barrel spring and a barrel arbour

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP12002440 2012-04-04
EP13713910.1A EP2834712B1 (en) 2012-04-04 2013-04-04 Barrel including a barrel spring and a barrel arbour
PCT/EP2013/057064 WO2013150086A1 (en) 2012-04-04 2013-04-04 Barrel shaft for a clock movement, barrel spring, and barrel including such a spring and/or such a shaft

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP21206061.0A Division EP3968093A1 (en) 2012-04-04 2013-04-04 Arbor for a clock movement, barrel spring and barrel including such a spring and/or such an arbor

Publications (2)

Publication Number Publication Date
EP2834712A1 EP2834712A1 (en) 2015-02-11
EP2834712B1 true EP2834712B1 (en) 2021-11-24

Family

ID=48045552

Family Applications (2)

Application Number Title Priority Date Filing Date
EP13713910.1A Active EP2834712B1 (en) 2012-04-04 2013-04-04 Barrel including a barrel spring and a barrel arbour
EP21206061.0A Pending EP3968093A1 (en) 2012-04-04 2013-04-04 Arbor for a clock movement, barrel spring and barrel including such a spring and/or such an arbor

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP21206061.0A Pending EP3968093A1 (en) 2012-04-04 2013-04-04 Arbor for a clock movement, barrel spring and barrel including such a spring and/or such an arbor

Country Status (5)

Country Link
US (2) US9448533B2 (en)
EP (2) EP2834712B1 (en)
JP (1) JP6219925B2 (en)
CN (2) CN108196438B (en)
WO (1) WO2013150086A1 (en)

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CN105759588A (en) * 2016-04-01 2016-07-13 杭州手表有限公司 Long-travel time high-frequency automatic mechanical watch
JP7133909B2 (en) 2016-07-04 2022-09-09 ロレックス・ソシエテ・アノニム Watch assembly manufacturing method and watch assembly obtained by said manufacturing method
CH713389B1 (en) * 2017-01-27 2020-11-30 Richemont Int Sa System for connecting a shaft to a part.
CH714452A2 (en) * 2017-12-15 2019-06-28 Nivarox Sa Barrel spring for a watch movement of a timepiece and method of manufacturing such a spring.
CH716092B1 (en) * 2018-04-26 2022-10-31 Patek Philippe Sa Geneve Clock barrel and method for modifying a watch movement.

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Also Published As

Publication number Publication date
CN104204965A (en) 2014-12-10
US10401796B2 (en) 2019-09-03
US9448533B2 (en) 2016-09-20
CN108196438B (en) 2020-09-08
CN108196438A (en) 2018-06-22
EP3968093A1 (en) 2022-03-16
JP6219925B2 (en) 2017-10-25
US20150092523A1 (en) 2015-04-02
JP2015512519A (en) 2015-04-27
CN104204965B (en) 2018-03-27
US20160349703A1 (en) 2016-12-01
WO2013150086A1 (en) 2013-10-10
EP2834712A1 (en) 2015-02-11

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