EP2756358A1 - Timepiece barrel having a small core diameter - Google Patents

Timepiece barrel having a small core diameter

Info

Publication number
EP2756358A1
EP2756358A1 EP12758482.9A EP12758482A EP2756358A1 EP 2756358 A1 EP2756358 A1 EP 2756358A1 EP 12758482 A EP12758482 A EP 12758482A EP 2756358 A1 EP2756358 A1 EP 2756358A1
Authority
EP
European Patent Office
Prior art keywords
bung
drum
ratchet
barrel
bore
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP12758482.9A
Other languages
German (de)
French (fr)
Other versions
EP2756358B1 (en
Inventor
Edmond Capt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Blancpain SA
Original Assignee
Blancpain SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Blancpain SA filed Critical Blancpain SA
Priority to EP12758482.9A priority Critical patent/EP2756358B1/en
Publication of EP2756358A1 publication Critical patent/EP2756358A1/en
Application granted granted Critical
Publication of EP2756358B1 publication Critical patent/EP2756358B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B1/00—Driving mechanisms
    • G04B1/10—Driving mechanisms with mainspring
    • G04B1/14—Mainsprings; Bridles therefor
    • G04B1/145—Composition and manufacture of the springs
    • 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
    • G04B1/165—Spring cylinder with friction transmission to the gearing (especially for Roskopf clockworks)
    • 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
    • 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

Definitions

  • the invention relates to a barrel assembly for a mechanical watch with reduced bung diameter.
  • the invention also relates to a watch movement comprising at least one such barrel assembly.
  • the invention also relates to a timepiece comprising at least one such movement and / or at least one such barrel assembly.
  • the invention relates to the field of watchmaking, and more particularly the field of energy storage barrels, for feeding a movement, a ring, or other functionality of a room watchmaking.
  • one solution consists of a decrease in the diameter of the barrel shaft and the associated bung, so as to increase the space available in the drum. for the spring.
  • the ratio of the bead radius to the thickness of the spring is usually between 10 and 20, and the invention proposes to lower this ratio below 10, and preferably in the range between 5 and 10.
  • a ratchet is mounted axially on a barrel axis or on a bung, via a square, the ratchet being generally fixed by an axial screw.
  • the size of this screw and that of the square thus condition a minimum diameter of a pivoting surface.
  • a shoulder abutting with this pivoting surface limits axial fretting of the shaft or the bung relative to a plate or bridge carrying a stone or the like.
  • a diameter even greater than that of this shoulder is necessary for a pivoting guide surface of the drum on the shaft or on the bung, combined with a shoulder limiting axial fretting of the drum.
  • Compliance with minimum material sections implies a quotation chain that results in a large size, difficult to reduce. In particular, it is not enough to reduce all the sizing, because the sections of material are then insufficient to ensure fatigue resistance.
  • Document FR 2 287 717 A1 in the name of SCHILD describes a barrel with a ratchet wheel attached to the shaft and adjacent to the bridge 10A in which this shaft pivots. It comprises a pawl in one piece, formed of a rigid portion rotatable about the shaft between a locking position and a release position, and an elastic arm whose free end has a detent able to engage in the teeth of the ratchet. This pawl is housed in a recess of the bridge 10A between the bridge 10A and the ratchet wheel.
  • the arm has at its free end a bearing element situated inside the contour of the ratchet, the flanks of this recess comprise two abutment elements cooperating, in the locked position, one with the support element, and the other with the latching nose, to determine the locking position.
  • the document FR 1 371 491 A in the name of PONS describes a method and a lubricating device.
  • the ratchet attached to the barrel shaft has access openings on a portion of the barrel bridge 10A or on a portion of the upper barrel bushing.
  • the bridge 10A may have similar openings, as well as the plate for access to the cover pad.
  • the document CH 295 135 A in the name of BRAC describes a barrel whose bonde carries the ratchet, whose movement is limited by a net on the plate.
  • This bung pivots on an axis whose one end cooperates with a bore of the plate, and the other end has a thread.
  • This thread cooperates with the tapping of a centering box mounted in a bore of the bridge 10A.
  • the thread and the support plate hold a centering ring abutting the end of the bung on the side of the bridge 10A.
  • the document EP 2 196 866 A2 in the name of ARTISANS HORLOGERS SARL concerns a bayonet attachment of the ratchet on an end square of the shaft.
  • the ratchet has a cutout of complementary shape to this non-circular drive profile, on which it is threaded and then abutted on the flange.
  • a fixing washer has a cut complementary shape to the non-circular drive profile of the shaft, on which it is threaded. This washer is then screwed on the ratchet by at least one eccentric screw.
  • the document JP 1 1 183644 A in the name of SEIKO INSTR INC relates to a barrel which comprises, for the display of the power reserve of the barrel, the use of the drum as a planet carrier, which carries a planetary gear pivotally mounted on its background.
  • the board of this planet wheel meshes with a coaxial wheel of the barrel axis, while its pinion meshes with a sun gear, also coaxial with the barrel axis, held axially by a stop.
  • This sun wheel meshes with a wheel of a gear wheel pivoted on the plate of the movement.
  • US 820252 A in the name of PORTER WILSON discloses a barrel shaft with a hook on a large diameter center span, and a clearance in front of the hook for the barrel spring.
  • the invention proposes to set up a solution allowing a significant reduction of the bung diameter compared to the prior art.
  • the invention relates to a watch barrel assembly, comprising at least one barrel drive spring mounted between, at a first end, a barrel drum, and at a second end a receiving surface that comprises a barrel plug , coaxial with said drum about a pivot axis, characterized in that the maximum radius of said leap with respect to said pivot axis is less than ten times the maximum thickness of said spring, further characterized in that said bung comprises successively, from a first end, towards a second end:
  • the outside diameter of said bung is degressive in steps from said flange to said second end
  • the outer diameter of said bung is degressive stepwise from said flange to said first end.
  • said scope is the range of larger diameter after said flange.
  • said barrel assembly comprises extraction means arranged to allow the axial extraction of said bung, along said pivot axis, by the exercise of a thrust or traction force on said bung .
  • said extraction means are constituted by at least one groove or / and a shoulder that includes said plug near said second end and beyond said scope.
  • said spring is enclosed in a chamber delimited by said drum and a lid fixed on said drum, and said bung comprises a second lower outer shaft portion on which a bore of said lid slides.
  • said bung is made in at least two parts, the first portion of diameter less than the smallest of the two diameters of said bore of said drum and said bore of a lid, and the other part having a bore driven on said first portion and which second portion, or comprises said receiving surface of said mainspring, or constitutes the inner end of said mainspring.
  • said bung is made in at least two parts, the first said inner portion comprising said means for fixing a ratchet or constituting said ratchet, and comprising said first pivoting surface, said first part having a centering surface and a thread, respectively a tapping, according to said pivot axis, and the other second portion having a centering bore fitted on said centering surface, and having a tapping, respectively a thread, complementary to said thread, respectively tapping, said first portion, said second portion carrying said bearing surface, said flange, said receiving surface of said mainspring or constituting the inner end of said mainspring, and still carrying said bearing, and said second pivoting surface.
  • said bung is made of at least two parts, the first part comprising a cylindrical or tubular cylinder shaft and having at its two opposite axial ends said first pivoting surface and said second pivoting surface. which are either integral with said barrel shaft or attached thereto by screwing and / or shrinking and / or welding, and the other second portion carrying said bearing surface, said flange, comprises said receiving surface of said mainspring or else constitutes the inner end of said mainspring, and still carries said bearing surface, said second part including a bore driven on said first part.
  • said first part is made in one piece with a ratchet holder or with a said ratchet.
  • said second part comprises means for pivoting said first part and / or a said ratchet arranged to cooperate with complementary drive means that comprises said first part or said ratchet, and to ensure both a pivotally contacting a contact in the axial direction of said pivot axis.
  • said second part is itself made up of several coaxial parts, one of which is in the form of a ring and carries a catch hook of a shell which comprises said at least one spring.
  • said receiving surface carries a catch hook of a shell that comprises said at least one spring, and said bung comprises, in line with said hook, a clearance for the passage of a strawberry or a drill bit for machining said hook.
  • said ratchet is integral with said bung.
  • said receiving surface is a surface of revolution with respect to said pivot axis.
  • said spring is fixed to said bung by friction.
  • said spring forms with said bung a welded or brazed monoblock spring-binder subassembly.
  • the invention also relates to a movement comprising at least one such barrel assembly for storing energy with an incorporated input, or else a ratchet integral pivotally to said bung or a barrel shaft integral with said bung, or well by a toothing of drum mounted integral pivotally of said drum, and an output constituted respectively, or by a toothing drum mounted integral pivotally of said drum, or by a ratchet integral pivotally of said bung or said barrel shaft
  • the invention also relates to a timepiece comprising at least one such clockwork movement and / or at least one such barrel assembly for energy storage with an incorporated input, or else a ratchet mounted pivotally to said bung or barrel shaft integral with said bung or by a toothing of drum mounted pivotally integral with said drum, and an outlet constituted respectively, or by a toothing drum mounted pivotally integral with said drum, or by a ratchet mounted pivotally integral with said bung or said barrel shaft.
  • a timepiece comprising at least one such clockwork movement and / or at least one such barrel assembly for energy storage with an incorporated input, or else a ratchet mounted pivotally to said bung or barrel shaft integral with said bung or by a toothing of drum mounted pivotally integral with said drum, and an outlet constituted respectively, or by a toothing drum mounted pivotally integral with said drum, or by a ratchet mounted pivotally integral with said bung or said barrel shaft.
  • FIG. 1 shows schematically and in section in a plane passing through its pivot axis, a watch cylinder according to the invention, with a plug having a flange cooperating with an inner surface of a barrel drum,
  • FIG. 2 is a variant of FIG. 1, with pivoting of the plug in a plate beyond the barrel drum,
  • FIG. 3 is a variant of the barrel according to the invention, in which the flange also constitutes the receiving surface of the mainspring, and is made in two parts, one of which is axial and carries a ratchet,
  • Figure 4 is a variant of the barrel according to the invention, with a plug made of three coaxial parts, two of which at the pivot axis of the barrel, Figure 4A is a similar embodiment with a continuous shaft and through;
  • FIG. 5 is a variant of the barrel according to the invention, with a bung made in four coaxial parts, two of which at the pivot axis of the barrel, and a tubular part carrying an external part carrying a hook of hooking the mainspring;
  • Figure 5A is a similar embodiment with a continuous and through shaft;
  • FIG. 6 is a variant of the barrel according to the invention, with a bung made in two coaxial parts, one of which is cylindrical at the pivot axis of the barrel, and an external part carrying a flange and a snap hook of the mainspring,
  • FIG. 7 to 9 illustrate, Figure 8 being viewed along the pivot axis and Figures 7 and 9 in section along this axis, a variant of the cylinder according to the invention with means for driving pivoting a part carrying a ratchet,
  • FIG. 10 shows a variant of the barrel according to the invention, with a main part of the bung carrying a flange, and an outer ring carrying a catch hook of the mainspring
  • - Figure 1 1 shows, in top view, a monobloc bung flange and hook and whose collar comprises a notch clearance of the hook machining tools
  • FIG. 12 shows, in the form of a block diagram, a watch movement comprising a barrel assembly according to the invention, and a timepiece comprising this movement and a barrel assembly according to the invention.
  • the invention relates to the field of watchmaking, and more particularly the field of energy storage barrels, for feeding a movement, a ring, or other functionality of a room watchmaking.
  • the invention relates to a mechanical watch cylinder with reduced bung diameter.
  • the invention relates to a barrel 1 watch assembly, comprising a mainspring 2 barrel.
  • This spring 2 is conventionally mounted between, at a first end 21 a barrel drum 3, and at a second end 22 a receiving surface 5 that includes a barrel plug 4 coaxial with the drum 3 about a pivot axis D .
  • This spring 2 is made of a cobalt-nickel-chromium-based multiphase alloy comprising from 44 to 46% of cobalt, from 20 to 22% of nickel, from 17 to 19% of chromium, from 4 to 6% of iron, from 3 to 5% of tungsten, from 3 to 5% of molybdenum, from 0 to 2% of titanium, from 0 to 1% of beryllium, and from Young's modulus of between 200 and 240 GPa and a shear modulus included between 80 and 100 GPa.
  • This spring 2 has a width / thickness ratio of between 3 and 23, and in particular between 9 and 21.
  • the bung 4 is made of steel or stainless steel. The maximum radius of the bung 4 with respect to the pivot axis D is less than ten times the maximum thickness of the spring 2, and preferably less than eight times this thickness, thanks to provisions described below.
  • the plug 4 comprises successively, from a first end 86, to a second end 87:
  • the barrel shaft 4 is in one piece, and has a bearing flange 40 on the inner face 31 of the drum 3, and whose flange diameter is greater than the envelope diameter of the surface of the barrel.
  • This flange 40 limits the frost between the shaft 4 and the drum 3 in one direction, the limitation in the other direction is effected by a shoulder 49 of the shaft with an inner boss 79 of the cover 7.
  • the outer diameter of the plug 4 is gradually decreasing from the flange 40 to the second end 87.
  • the outer diameter of the plug 4 is gradually decreasing from the flange 40 to the first end 86.
  • the flange 40 cooperates in abutment with an inner face 31 in a shoulder drum 3.
  • FIG. 2 is a variant of Figure 1, with an additional bearing for guiding the shaft in the bridge, above the scope formed at the drum.
  • the invention allows the improvement of the power reserve of existing calibers, without major modification thereof.
  • a particular embodiment for the application of the invention to the barrel of the caliber "Frédéric Piguet 1 180 BLANCPAIN", made without modifying the lid of the barrel, corresponds to a diameter 401 with a value of 1.80 mm, and a diameter 501 with a value of 1.20 mm.
  • the span 43 constitutes the range of larger diameter after the flange 40.
  • the diameter of the span 43 is greater than the largest diameter of the bearing surface 5 of the spring 2.
  • the barrel assembly 1 comprises extraction means 190, which are arranged to allow the axial extraction of the bung 4, along the pivot axis D, by the exercise of a thrust or traction force. on the bung 4.
  • these extraction means 190 are constituted by at least one groove 191 and / or a shoulder that comprises the bung 4 near the second end 87 and beyond the Scope 44.
  • These two figures illustrate a bung in at least three parts: an upper part of the bung out of the drum, with bearing shoulder on the side of the bridge opposite the barrel, and driven or screwed in a middle part.
  • This middle part between drum and cover, carrying the spring, either directly (Figure 4), or indirectly by insert ring ( Figure 5): this middle part is provided with the extraction means 190 in the form of a groove to the opposite end to the top.
  • a lower guide portion in the plate is driven or screwed into the middle part.
  • Figures 4A and 5A illustrate a two-part embodiment with through shaft.
  • the spring 2 is enclosed in a chamber 32 delimited by the drum 3 and a cover 7 fixed on the drum 3, and the bung 4 comprises a second outer shaft portion 44 on which a bore 75 of the lid 7 slides.
  • FIG. 6 there is a smooth shaft carrying a bung flange between drum and cover.
  • This flange constitutes an abutment surface with an inner surface of the drum.
  • the plug 4 is thus made of at least two parts, the first part 4A of smaller diameter than the smaller of the two diameters of the bore 35 of the drum 3 and the bore 75 of a cover 7, and the other part 2B , which may be substantially tubular, having a bore driven on the first part 4A.
  • This second part 4B or comprises the receiving surface 5 of the mainspring 2, or constitutes the inner end of the mainspring 2.
  • the shaft is in two parts: an upper part, with guide in bridge and one-piece ratchet, screwed into a lower portion substantially limited to the volume of the spring chamber.
  • the bung 4 is thus made of at least two parts, preferably one of these two parts is entirely in the chamber 32.
  • the first inner part 4A comprises the attachment means 120 of a ratchet 12 or constitutes the ratchet 12, and has the first pivoting surface 181 in the bridge 10A 10 or in a bridge stone 10A.
  • This first part 4A comprises a centering surface 183 and a thread 185, respectively a tapping, along the pivot axis D.
  • the other second portion 4B which may be substantially tubular, comprises a centering bore 184 fitted to the centering surface 183, and comprises a tapping 186, respectively a thread, complementary to the thread 185, respectively tapping, of the first part 4A.
  • This second part 4B carries the bearing surface 43, the collar 40, the receiving surface 5 of the driving spring 2 or constitutes the inner end of the driving spring 2, and is still carrying the bearing surface 44, and the second pivoting range 182.
  • the bung 4 is made of at least two parts, the first part 4A having a cylindrical or tubular barrel shaft 18 and having at its two opposite axial ends the first pivoting surface 181 and the second bearing surface pivot 182, which are either monobloc with the barrel shaft or reported on the latter by screwing and / or shrinking or / and welding.
  • the other second part 4B carries the bearing surface 43, the collar 40, comprises the receiving surface 5 of the motor spring 2 or constitutes the inner end of the driving spring 2, and still carries the bearing surface 44.
  • This second portion 4B comprising a bore bored on the first part 4A.
  • the first part 4A is made in one piece with a ratchet holder 81 or with a ratchet 12.
  • the upper end of the shaft has corresponding groove driving plates of the ratchet, which are located in the lower part of the ratchet, drum side.
  • the second portion 4B advantageously comprises driving means 187 pivoting the first portion 4A or / and a ratchet 12 arranged to cooperate with complementary drive means 188 that includes the first portion 4A or ratchet 12 and to provide both a pivotal contact and a contact in the axial direction of the pivot axis D.
  • a clearance 188 made in the ratchet 12 by a drill bit train cooperates with a profile 187 having two dishes milled at the end of the bung.
  • This embodiment according to FIGS. 7 to 9 is particularly suitable for very small calibres, such as the "615 BLANCPAIN", especially for ladies' watches, because, thanks to the invention, it is possible to reduce the diameter 502 to 1.00. mm.
  • the diameter 121 of FIG. 8 has a value of 0.60 mm, and the diameter 122 has a value of only 0.35 mm. It is possible to pass a torque of 2 mN.m, over a radius of about 0.25 mm, as shown in dashed lines in FIG. 8, which represents a force of 4N on each vertical contact.
  • the diameter 401 of Figure 1 can be made to 0.80 mm, the diameter of the scope 44 to 0.5 mm, and the diameter of the range 182 to 0.30 mm.
  • the shaft carries a flange, between drum and cover.
  • This flange constitutes an abutment surface with an inner surface of the drum, as in FIG. 6.
  • the flange comprises a cutout allowing the hooking hook of the spring to be machined over a zone of diameter smaller than that of the flange, which belongs to either to the shaft itself if it is monobloc, or to a ring attached to this shaft as in the case of the figures.
  • the second part 4B itself consists of several coaxial parts, one of which is in the form of a ring and carries a hook 41 for hooking a shell that includes the at least one spring 2.
  • the receiving surface 5 carries a hook 41 for hooking a shell that comprises the at least one spring 2, and the plug 4 comprises, at the right of the hook 41. , and in particular at the flange 40, a clearance 52 for the passage of a milling cutter or a drill bit for machining the hook 41.
  • the ratchet 12 is integral with the bung 4.
  • the receiving surface 5 is a surface of revolution with respect to the pivot axis D.
  • the spring 2 is fixed to the bung 4 by friction.
  • the spring 2 forms with the bung 4 a welded or brazed unbreakable monobloc spring-bung subassembly, or the like.
  • the invention also relates to a watchmaking movement 100 comprising at least one such barrel assembly 1 for storing energy with an incorporated input, or else a ratchet 12 pivotally mounted on the bung 4 or a spindle.
  • barrel 18 secured to the bung 4, or by a toothing drum 13 pivotally integral with the drum 3, and an outlet constituted respectively, or by a toothing drum 13 pivotally integral drum 3, or by a ratchet 12 mounted pivotally connected to the bung 4 or to the barrel shaft 18.
  • the invention also relates to a timepiece 1000 comprising at least one watch movement 100 and / or at least one such barrel assembly 1 for energy storage with an incorporated input, or a ratchet 12 mounted solidarity pivoting the bung 4 or a barrel shaft 18 secured to the bung 4, or by a toothing drum 13 pivotally integral with the drum 3, and an output constituted respectively, or by a solid drum toothing 13 in pivoting drum 3, or by a ratchet 12 mounted pivotally integral with the bung 4 or the barrel shaft 18.

Abstract

The invention relates to a timepiece barrel assembly (1) comprising a mainspring (2) mounted between a drum (3) and a receiving surface (5) that comprises a core (4) coaxial to said drum (3) about an axis (D). Said core (4) comprises, consecutively from a first end (86) to a second end (87): a means for attaching a ratchet (12) and/or a first pivot bearing (181) in a plate; a bearing (43) for pivoting said drum (3); a collar (40) projecting from said bearing (43), and bearing on an inner surface (31) of said drum (3) toward said spring (2); said receiving surface (5), which is radially set back from said collar (40); a bearing (44) which is radially set back from said receiving surface, and which is to pivot a cover (7) for closing said barrel (1); and a second pivot bearing (182) in a plate.

Description

Barillet d'horlogerie à diamètre de bonde réduit  Watchdog with reduced bung diameter
Domaine de l'invention Field of the invention
L'invention concerne un ensemble barillet pour montre mécanique avec diamètre de bonde réduit.  The invention relates to a barrel assembly for a mechanical watch with reduced bung diameter.
L'invention concerne encore un mouvement d'horlogerie comportant au moins un tel ensemble barillet.  The invention also relates to a watch movement comprising at least one such barrel assembly.
L'invention concerne encore une pièce d'horlogerie comportant au moins un tel mouvement ou/et au moins un tel ensemble barillet.  The invention also relates to a timepiece comprising at least one such movement and / or at least one such barrel assembly.
L'invention concerne le domaine de l'horlogerie, et plus particulièrement le domaine des barillets de stockage d'énergie, pour l'alimentation d'un mouvement, d'une sonnerie, ou d'une autre fonctionnalité d'une pièce d'horlogerie.  The invention relates to the field of watchmaking, and more particularly the field of energy storage barrels, for feeding a movement, a ring, or other functionality of a room watchmaking.
Arrière-plan de l'invention Background of the invention
Pour augmenter la réserve de marche, par augmentation du nombre de tours d'un ressort de barillet, une solution consiste en une diminution du diamètre de l'arbre de barillet et de la bonde associée, de façon à augmenter la place disponible dans le tambour pour le ressort.  To increase the power reserve, by increasing the number of turns of a mainspring, one solution consists of a decrease in the diameter of the barrel shaft and the associated bung, so as to increase the space available in the drum. for the spring.
Le rapport du rayon de bonde par rapport à l'épaisseur du ressort est usuellement compris entre 10 et 20, et l'invention se propose d'abaisser ce rapport en-dessous de 10, et préférentiellement dans la plage comprise entre 5 et 10.  The ratio of the bead radius to the thickness of the spring is usually between 10 and 20, and the invention proposes to lower this ratio below 10, and preferably in the range between 5 and 10.
Le dimensionnement ne doit pas être fait à la légère, en effet un risque de casse existe sir le diamètre de la bonde est trop faible.  Sizing should not be done lightly, indeed a risk of breakage exists if the diameter of the plug is too small.
Dans l'architecture classique des barillets, un rochet est monté axialement sur un axe de barillet ou sur une bonde, par l'intermédiaire d'un carré, le rochet étant généralement fixé par une vis axiale. La dimension de cette vis et celle du carré conditionnent donc un diamètre minimal d'une portée de pivotement. Un épaulement jointif à cette portée de pivotement limite l'ébat axial de l'arbre ou de la bonde par rapport à une platine ou à un pont porteur d'une pierre ou similaire.  In the conventional architecture of the barrels, a ratchet is mounted axially on a barrel axis or on a bung, via a square, the ratchet being generally fixed by an axial screw. The size of this screw and that of the square thus condition a minimum diameter of a pivoting surface. A shoulder abutting with this pivoting surface limits axial fretting of the shaft or the bung relative to a plate or bridge carrying a stone or the like.
Un diamètre encore supérieur à celui de cet épaulement est nécessaire pour une portée de guidage en pivotement du tambour sur l'arbre ou sur la bonde, combinée à un épaulement de limitation de l'ébat axial du tambour. Le respect de sections de matière minimales implique une chaîne de cotation qui se traduit par un encombrement conséquent, difficile à réduire. On ne peut en particulier pas se contenter de réduire l'ensemble des dimensionnements, car les sections de matière sont alors insuffisantes pour assurer la tenue en fatigue. A diameter even greater than that of this shoulder is necessary for a pivoting guide surface of the drum on the shaft or on the bung, combined with a shoulder limiting axial fretting of the drum. Compliance with minimum material sections implies a quotation chain that results in a large size, difficult to reduce. In particular, it is not enough to reduce all the sizing, because the sections of material are then insufficient to ensure fatigue resistance.
Le document FR 2 287 717 A1 au nom de SCHILD décrit un barillet avec une roue à rochet fixée à l'arbre et adjacente au pont 10A dans lequel pivote cet arbre. Il comporte un cliquet en une pièce, formé d'une partie rigide mobile en rotation autour de l'arbre entre une position de blocage et une position de dégagement, et d'un bras élastique dont l'extrémité libre présente un bec d'encliquetage capable de s'engager dans la denture du rochet. Ce cliquet est logé dans une creusure du pont 10A entre le pont 10A et la roue à rochet. Le bras présente à son extrémité libre un élément d'appui situé à l'intérieur du contour du rochet, les flancs de cette creusure comprennent deux éléments de butée coopérant, en position de blocage, l'un avec l'élément d'appui, et l'autre avec le bec d'encliquetage, pour déterminer la position de blocage.  Document FR 2 287 717 A1 in the name of SCHILD describes a barrel with a ratchet wheel attached to the shaft and adjacent to the bridge 10A in which this shaft pivots. It comprises a pawl in one piece, formed of a rigid portion rotatable about the shaft between a locking position and a release position, and an elastic arm whose free end has a detent able to engage in the teeth of the ratchet. This pawl is housed in a recess of the bridge 10A between the bridge 10A and the ratchet wheel. The arm has at its free end a bearing element situated inside the contour of the ratchet, the flanks of this recess comprise two abutment elements cooperating, in the locked position, one with the support element, and the other with the latching nose, to determine the locking position.
Le document FR 1 371 491 A au nom de PONS décrit un procédé et un dispositif de lubrification. Le rochet fixé sur l'arbre de barillet présente des ouvertures d'accès sur une partie du pont 10A de barillet ou sur une partie du coussinet supérieur du barillet. Le pont 10A peut présenter des ouvertures similaires, ainsi que la platine pour l'accès au coussinet du couvercle.  The document FR 1 371 491 A in the name of PONS describes a method and a lubricating device. The ratchet attached to the barrel shaft has access openings on a portion of the barrel bridge 10A or on a portion of the upper barrel bushing. The bridge 10A may have similar openings, as well as the plate for access to the cover pad.
Le document US 886 196 A au nom de FALLER LEWIS ALBERT. Le tambour et le couvercle d'un barillet pivotent de façon limitée par les parois d'une cavité formée par une platine et un pont 10A plaqués l'un sur l'autre. Le tambour pivote autour de l'axe de barillet par l'intermédiaire d'une bague qui comporte deux plats qui coopèrent avec une lumière oblongue du tambour. Cette bague porte, par un filetage, le rochet qui pivote de façon limitée par les parois d'une cavité définie par la platine et le tambour. L'arbre porte, du côté opposé, une roue entre le couvercle et le pont 10A.  US 886196 A in the name of FALLER LEWIS ALBERT. The drum and the lid of a barrel pivot in a limited manner by the walls of a cavity formed by a plate and a bridge 10A pressed one on the other. The drum pivots about the barrel axis through a ring that has two flats that cooperate with an oblong slot of the drum. This ring carries, by a thread, the ratchet which pivots in a limited way by the walls of a cavity defined by the plate and the drum. The shaft carries, on the opposite side, a wheel between the cover and the bridge 10A.
Le document CH 295 135 A au nom de BRAC décrit un barillet dont la bonde porte le rochet, dont le mouvement est limité par un filet sur la platine. Cette bonde pivote sur un axe dont une extrémité coopère avec un alésage de la platine, et dont l'autre extrémité comporte un filetage. Ce filetage coopère avec le taraudage d'un boîtier de centrage monté dans un alésage du pont 10A. Le filetage et la plaque support maintiennent une bague de centrage faisant butée pour l'extrémité de la bonde du côté du pont 10A. Le document EP 2 196 866 A2 au nom de ARTISANS HORLOGERS SARL concerne une fixation à baïonnette du rochet sur un carré d'extrémité de l'arbre. Il combine un profil d'entraînement non circulaire à l'extrémité de l'arbre, qui est séparé, par une gorge, d'un épaulement pour un appui en butée du rochet. Le rochet comporte une découpe de forme complémentaire à ce profil d'entraînement non circulaire, sur lequel il est enfilé puis mis en butée sur la collerette. Une rondelle de fixation comporte une découpe de forme complémentaire au profil d'entraînement non circulaire de l'arbre, sur lequel elle est enfilée. Cette rondelle est ensuite vissée sur le rochet par au moins une vis excentrique. The document CH 295 135 A in the name of BRAC describes a barrel whose bonde carries the ratchet, whose movement is limited by a net on the plate. This bung pivots on an axis whose one end cooperates with a bore of the plate, and the other end has a thread. This thread cooperates with the tapping of a centering box mounted in a bore of the bridge 10A. The thread and the support plate hold a centering ring abutting the end of the bung on the side of the bridge 10A. The document EP 2 196 866 A2 in the name of ARTISANS HORLOGERS SARL concerns a bayonet attachment of the ratchet on an end square of the shaft. It combines a non-circular drive profile at the end of the shaft, which is separated by a groove, a shoulder for abutment abutment of the ratchet. The ratchet has a cutout of complementary shape to this non-circular drive profile, on which it is threaded and then abutted on the flange. A fixing washer has a cut complementary shape to the non-circular drive profile of the shaft, on which it is threaded. This washer is then screwed on the ratchet by at least one eccentric screw.
Le document JP 1 1 183644 A au nom de SEIKO INSTR INC, concerne un barillet qui comporte, pour la visualisation de la réserve de marche du barillet, l'utilisation du tambour comme porte-satellite, qui embarque une roue planétaire montée pivotante sur son fond. La planche de cette roue planétaire engrène avec une roue coaxiale de l'axe de barillet, tandis que son pignon engrène avec une roue solaire, également coaxiale à l'axe de barillet, retenue axialement par un arrêt. Cette roue solaire engrène avec une roue d'un rouage pivoté sur la platine du mouvement.  The document JP 1 1 183644 A in the name of SEIKO INSTR INC, relates to a barrel which comprises, for the display of the power reserve of the barrel, the use of the drum as a planet carrier, which carries a planetary gear pivotally mounted on its background. The board of this planet wheel meshes with a coaxial wheel of the barrel axis, while its pinion meshes with a sun gear, also coaxial with the barrel axis, held axially by a stop. This sun wheel meshes with a wheel of a gear wheel pivoted on the plate of the movement.
Le document US 820 252 A au nom de PORTER WILSON décrit un arbre de barillet avec un crochet sur une portée médiane de grand diamètre, et un dégagement devant le crochet pour le ressort de barillet.  US 820252 A in the name of PORTER WILSON discloses a barrel shaft with a hook on a large diameter center span, and a clearance in front of the hook for the barrel spring.
Résumé de l'invention Summary of the invention
Du fait de ces limites physiques au dimensionnement des différents composants, il est nécessaire d'envisager d'autres architectures de barillet que l'architecture classique qui vient d'être décrite.  Because of these physical limitations to the dimensioning of the various components, it is necessary to consider other barrel architectures than the conventional architecture that has just been described.
Une contrainte importante est d'assurer la démontabilité de l'ensemble, pour un éventuel échange du ressort de barillet.  An important constraint is to ensure the disassembly of the assembly, for a possible exchange of the mainspring.
L'invention se propose de mettre en place une solution permettant une diminution importante du diamètre de bonde par rapport à l'art antérieur.  The invention proposes to set up a solution allowing a significant reduction of the bung diameter compared to the prior art.
A cet effet, l'invention concerne un ensemble barillet d'horlogerie, comportant au moins un ressort moteur de barillet monté entre, à une première extrémité un tambour de barillet, et à une deuxième extrémité une surface de réception que comporte une bonde de barillet, coaxiale audit tambour autour d'un axe de pivotement, caractérisé en ce que le rayon maximal de ladite bond par rapport audit axe de pivotement est inférieur à dix fois l'épaisseur maximale dudit ressort, encore caractérisé en ce que ladite bonde comporte successivement, depuis une première extrémité, vers une deuxième extrémité: For this purpose, the invention relates to a watch barrel assembly, comprising at least one barrel drive spring mounted between, at a first end, a barrel drum, and at a second end a receiving surface that comprises a barrel plug , coaxial with said drum about a pivot axis, characterized in that the maximum radius of said leap with respect to said pivot axis is less than ten times the maximum thickness of said spring, further characterized in that said bung comprises successively, from a first end, towards a second end:
- des moyens de fixation d'un rochet, ou/et une première portée de pivotement dans une platine ou un pont d'un mécanisme horloger,  means for fixing a ratchet, and / or a first pivoting surface in a plate or a bridge of a clock mechanism,
- puis une portée de pivotement par rapport à un alésage dudit tambour, - then a pivoting surface with respect to a bore of said drum,
- puis une collerette saillante radialement par rapport à ladite portée et coopérant en appui avec une face interne que comporte ledit tambour du côté dudit au moins un ressort, and then a flange projecting radially with respect to said bearing surface and cooperating in abutment with an internal face that comprises said drum on the side of said at least one spring,
- puis, en affleurement ou en retrait radialement par rapport à ladite collerette, ladite surface de réception dudit au moins un ressort,  - Then, flush or recessed radially relative to said flange, said receiving surface of said at least one spring,
- puis, en retrait radialement par rapport à ladite surface de réception, une portée de pivotement par rapport à un alésage d'un couvercle agencé pour constituer avec ledit tambour une chambre contenant ledit au moins un ressort moteur,  - Then, radially recessed with respect to said receiving surface, a pivoting surface with respect to a bore of a cover arranged to constitute with said drum a chamber containing said at least one mainspring,
- puis une deuxième portée de pivotement dans une platine ou un pont dudit mécanisme horloger.  - Then a second pivoting range in a plate or bridge of said clock mechanism.
Selon une caractéristique de l'invention, le diamètre extérieur de ladite bonde est dégressif par paliers depuis ladite collerette jusqu'à ladite deuxième extrémité  According to one characteristic of the invention, the outside diameter of said bung is degressive in steps from said flange to said second end
Selon une caractéristique de l'invention, le diamètre extérieur de ladite bonde est dégressif par paliers depuis ladite collerette jusqu'à ladite première extrémité.  According to one characteristic of the invention, the outer diameter of said bung is degressive stepwise from said flange to said first end.
Selon une caractéristique de l'invention, ladite portée constitue la portée de plus grand diamètre après ladite collerette.  According to a feature of the invention, said scope is the range of larger diameter after said flange.
Selon une caractéristique de l'invention, ledit ensemble barillet comporte des moyens d'extraction agencés pour permettre l'extraction axiale de ladite bonde, selon ledit axe de pivotement, par l'exercice d'un effort de poussée ou de traction sur ladite bonde.  According to a characteristic of the invention, said barrel assembly comprises extraction means arranged to allow the axial extraction of said bung, along said pivot axis, by the exercise of a thrust or traction force on said bung .
Selon une caractéristique de l'invention, lesdits moyens d'extraction sont constitués par au moins une gorge ou/et un épaulement que comporte ladite bonde à proximité de ladite deuxième extrémité et au-delà de ladite portée.  According to a characteristic of the invention, said extraction means are constituted by at least one groove or / and a shoulder that includes said plug near said second end and beyond said scope.
Selon une caractéristique de l'invention, ledit ressort est enfermé dans une chambre délimitée par ledit tambour et un couvercle fixé sur ledit tambour, et ladite bonde comporte une seconde partie arbrée externe inférieure sur laquelle coulisse un alésage dudit couvercle. Selon une caractéristique de l'invention, ladite bonde est réalisée en au moins deux parties, l'une première partie de diamètre inférieur au plus petit des deux diamètres dudit alésage dudit tambour et dudit alésage d'un couvercle, et l'autre deuxième partie comportant un alésage chassé sur ladite première partie et laquelle deuxième partie, ou bien comporte ladite surface de réception dudit ressort moteur, ou bien constitue l'extrémité interne dudit ressort moteur. According to a characteristic of the invention, said spring is enclosed in a chamber delimited by said drum and a lid fixed on said drum, and said bung comprises a second lower outer shaft portion on which a bore of said lid slides. According to one characteristic of the invention, said bung is made in at least two parts, the first portion of diameter less than the smallest of the two diameters of said bore of said drum and said bore of a lid, and the other part having a bore driven on said first portion and which second portion, or comprises said receiving surface of said mainspring, or constitutes the inner end of said mainspring.
Selon une caractéristique de l'invention, ladite bonde est réalisée en au moins deux parties, l'une première partie dite intérieure comportant lesdits moyens de fixation d'un rochet ou constituant ledit rochet, et comportant ladite première portée de pivotement, ladite première partie comportant une portée de centrage et un filetage, respectivement un taraudage, selon ledit axe de pivotement, et l'autre deuxième partie comportant un alésage de centrage ajusté sur ladite portée de centrage, et comportant un taraudage, respectivement un filetage, complémentaire audit filetage, respectivement taraudage, de ladite première partie, ladite deuxième partie étant porteuse de ladite portée, de ladite collerette, de ladite surface de réception dudit ressort moteur ou bien constituant l'extrémité interne dudit ressort moteur, et étant encore porteuse de ladite portée, et de ladite deuxième portée de pivotement .  According to a characteristic of the invention, said bung is made in at least two parts, the first said inner portion comprising said means for fixing a ratchet or constituting said ratchet, and comprising said first pivoting surface, said first part having a centering surface and a thread, respectively a tapping, according to said pivot axis, and the other second portion having a centering bore fitted on said centering surface, and having a tapping, respectively a thread, complementary to said thread, respectively tapping, said first portion, said second portion carrying said bearing surface, said flange, said receiving surface of said mainspring or constituting the inner end of said mainspring, and still carrying said bearing, and said second pivoting surface.
Selon une caractéristique de l'invention, ladite bonde est réalisée en au moins deux parties, l'une première partie comportant un arbre de barillet cylindrique ou tubulaire et comportant à ses deux extrémités axiales opposées ladite première portée de pivotement et ladite deuxième portée de pivotement, qui sont ou bien monobloc avec ledit arbre de barillet ou bien rapportées sur ce dernier par vissage ou/et frettage ou/et soudage, et l'autre deuxième partie qui porte ladite portée, ladite collerette, comporte ladite surface de réception dudit ressort moteur ou bien constitue l'extrémité interne dudit ressort moteur, et porte encore ladite portée, ladite deuxième partie comportant un alésage chassé sur ladite première partie.  According to one characteristic of the invention, said bung is made of at least two parts, the first part comprising a cylindrical or tubular cylinder shaft and having at its two opposite axial ends said first pivoting surface and said second pivoting surface. which are either integral with said barrel shaft or attached thereto by screwing and / or shrinking and / or welding, and the other second portion carrying said bearing surface, said flange, comprises said receiving surface of said mainspring or else constitutes the inner end of said mainspring, and still carries said bearing surface, said second part including a bore driven on said first part.
Selon une caractéristique de l'invention, ladite première partie est réalisée monobloc avec un porte-rochet ou avec un dit rochet.  According to a feature of the invention, said first part is made in one piece with a ratchet holder or with a said ratchet.
Selon une caractéristique de l'invention, ladite deuxième partie comporte des moyens d'entraînement en pivotement de ladite première partie ou/et d'un dit rochet agencés pour coopérer avec des moyens d'entraînement complémentaires que comporte ladite première partie ou ledit rochet, et pour assurer aussi bien un contact en pivotement qu'un contact dans la direction axiale dudit axe de pivotement. According to a characteristic of the invention, said second part comprises means for pivoting said first part and / or a said ratchet arranged to cooperate with complementary drive means that comprises said first part or said ratchet, and to ensure both a pivotally contacting a contact in the axial direction of said pivot axis.
Selon une caractéristique de l'invention, ladite deuxième partie est elle- même constituée de plusieurs parties coaxiales dont l'une est réalisée sous forme de bague et porte un crochet d'accrochage d'un coquillon que comporte ledit au moins un ressort.  According to a characteristic of the invention, said second part is itself made up of several coaxial parts, one of which is in the form of a ring and carries a catch hook of a shell which comprises said at least one spring.
Selon une caractéristique de l'invention, ladite surface de réception porte un crochet d'accrochage d'un coquillon que comporte ledit au moins un ressort, et ladite bonde comporte, au droit dudit crochet, un dégagement pour le passage d'une fraise ou d'un train de fraises pour l'usinage dudit crochet.  According to a feature of the invention, said receiving surface carries a catch hook of a shell that comprises said at least one spring, and said bung comprises, in line with said hook, a clearance for the passage of a strawberry or a drill bit for machining said hook.
Selon une caractéristique de l'invention, ledit rochet est monobloc avec ladite bonde.  According to a characteristic of the invention, said ratchet is integral with said bung.
Selon une caractéristique de l'invention, ladite surface de réception est une surface de révolution par rapport audit axe de pivotement.  According to a characteristic of the invention, said receiving surface is a surface of revolution with respect to said pivot axis.
Selon une caractéristique de l'invention, ledit ressort est fixé à ladite bonde par friction.  According to a characteristic of the invention, said spring is fixed to said bung by friction.
Selon une caractéristique de l'invention, ledit ressort forme avec ladite bonde un sous-ensemble ressort-bonde monobloc soudé ou brasé.  According to a feature of the invention, said spring forms with said bung a welded or brazed monoblock spring-binder subassembly.
L'invention concerne encore un mouvement comportant au moins un tel ensemble barillet pour le stockage d'énergie avec une entrée constituée, ou bien par un rochet monté solidaire en pivotement de ladite bonde ou d'un arbre de barillet solidaire de ladite bonde , ou bien par une denture de tambour montée solidaire en pivotement dudit tambour, et une sortie constituée respectivement, ou bien par une denture de tambour montée solidaire en pivotement dudit tambour, ou bien par un rochet monté solidaire en pivotement de ladite bonde ou dudit arbre de barillet  The invention also relates to a movement comprising at least one such barrel assembly for storing energy with an incorporated input, or else a ratchet integral pivotally to said bung or a barrel shaft integral with said bung, or well by a toothing of drum mounted integral pivotally of said drum, and an output constituted respectively, or by a toothing drum mounted integral pivotally of said drum, or by a ratchet integral pivotally of said bung or said barrel shaft
L'invention concerne encore une pièce d'horlogerie comportant au moins un tel mouvement d'horlogerie ou/et au moins un tel ensemble barillet pour le stockage d'énergie avec une entrée constituée, ou bien par un rochet monté solidaire en pivotement de ladite bonde ou d'un arbre de barillet solidaire de ladite bonde ou bien par une denture de tambour montée solidaire en pivotement dudit tambour, et une sortie constituée respectivement, ou bien par une denture de tambour montée solidaire en pivotement dudit tambour, ou bien par un rochet monté solidaire en pivotement de ladite bonde ou dudit arbre de barillet. Description sommaire des dessins The invention also relates to a timepiece comprising at least one such clockwork movement and / or at least one such barrel assembly for energy storage with an incorporated input, or else a ratchet mounted pivotally to said bung or barrel shaft integral with said bung or by a toothing of drum mounted pivotally integral with said drum, and an outlet constituted respectively, or by a toothing drum mounted pivotally integral with said drum, or by a ratchet mounted pivotally integral with said bung or said barrel shaft. Brief description of the drawings
D'autres caractéristiques et avantages de l'invention apparaîtront mieux à la lecture de la description détaillée qui va suivre, en référence aux dessins annexés, où:  Other characteristics and advantages of the invention will appear better on reading the detailed description which follows, with reference to the appended drawings, in which:
- la figure 1 représente, de façon schématisée et en coupe dans un plan passant par son axe de pivotement, un barillet d'horlogerie selon l'invention, avec une bonde comportant une collerette coopérant avec une surface intérieure d'un tambour du barillet,  - Figure 1 shows schematically and in section in a plane passing through its pivot axis, a watch cylinder according to the invention, with a plug having a flange cooperating with an inner surface of a barrel drum,
- la figure 2 est une variante de la figure 1 , avec pivotement de la bonde dans une platine au-delà du tambour de barillet,  FIG. 2 is a variant of FIG. 1, with pivoting of the plug in a plate beyond the barrel drum,
- la figure 3 est une variante du barillet selon l'invention,, où la collerette constitue aussi la surface de réception du ressort de barillet, et est réalisée en deux parties dont l'une axiale porte un rochet,  FIG. 3 is a variant of the barrel according to the invention, in which the flange also constitutes the receiving surface of the mainspring, and is made in two parts, one of which is axial and carries a ratchet,
- la figure 4 est une variante du barillet selon l'invention, avec une bonde réalisée en trois parties coaxiales, dont deux au niveau de l'axe de pivotement du barillet, la figure 4A est une exécution similaire avec un arbre continu et traversant ;  - Figure 4 is a variant of the barrel according to the invention, with a plug made of three coaxial parts, two of which at the pivot axis of the barrel, Figure 4A is a similar embodiment with a continuous shaft and through;
- la figure 5 est une variante du barillet selon l'invention, avec une bonde réalisée en quatre parties coaxiales, dont deux au niveau de l'axe de pivotement du barillet, et une partie tubulaire portant une partie externe porteuse d'un crochet d'accrochage du ressort de barillet ; la figure 5A est une exécution similaire avec un arbre continu et traversant ;  FIG. 5 is a variant of the barrel according to the invention, with a bung made in four coaxial parts, two of which at the pivot axis of the barrel, and a tubular part carrying an external part carrying a hook of hooking the mainspring; Figure 5A is a similar embodiment with a continuous and through shaft;
- la figure 6 est une variante du barillet selon l'invention, avec une bonde réalisée en deux parties coaxiales, dont une cylindrique au niveau de l'axe de pivotement du barillet, et une partie externe porteuse d'une collerette et d'un crochet d'accrochage du ressort de barillet,  FIG. 6 is a variant of the barrel according to the invention, with a bung made in two coaxial parts, one of which is cylindrical at the pivot axis of the barrel, and an external part carrying a flange and a snap hook of the mainspring,
- les figures 7 à 9 illustrent, la figure 8 étant vue selon l'axe de pivotement et les figures 7 et 9 en coupe selon cet axe, une variante du barillet selon l'invention, avec des moyens d'entraînement en pivotement d'une partie porteuse d'un rochet,  - Figures 7 to 9 illustrate, Figure 8 being viewed along the pivot axis and Figures 7 and 9 in section along this axis, a variant of the cylinder according to the invention with means for driving pivoting a part carrying a ratchet,
- la figure 10 représente une variante du barillet selon l'invention, avec une partie principale de bonde porteuse d'une collerette, et d'une bague externe porteuse d'un crochet d'accrochage du ressort de barillet, - la figure 1 1 représente, en vue de dessus, une bonde monobloc à collerette et crochet et dont la collerette comporte une échancrure de dégagement des outils d'usinage du crochet, FIG. 10 shows a variant of the barrel according to the invention, with a main part of the bung carrying a flange, and an outer ring carrying a catch hook of the mainspring, - Figure 1 1 shows, in top view, a monobloc bung flange and hook and whose collar comprises a notch clearance of the hook machining tools,
- la figure 12 représente, sous forme d'un schéma-blocs, un mouvement d'horlogerie comportant un ensemble barillet selon l'invention, et une pièce d'horlogerie comportant ce mouvement et un ensemble barillet selon l'invention.  - Figure 12 shows, in the form of a block diagram, a watch movement comprising a barrel assembly according to the invention, and a timepiece comprising this movement and a barrel assembly according to the invention.
Description détaillée des modes de réalisation préférés Detailed Description of the Preferred Embodiments
L'invention concerne le domaine de l'horlogerie, et plus particulièrement le domaine des barillets de stockage d'énergie, pour l'alimentation d'un mouvement, d'une sonnerie, ou d'une autre fonctionnalité d'une pièce d'horlogerie.  The invention relates to the field of watchmaking, and more particularly the field of energy storage barrels, for feeding a movement, a ring, or other functionality of a room watchmaking.
Plus particulièrement, l'invention concerne un barillet pour montre mécanique avec diamètre de bonde réduit.  More particularly, the invention relates to a mechanical watch cylinder with reduced bung diameter.
L'invention concerne un ensemble barillet 1 d'horlogerie, comportant un ressort moteur 2 de barillet. Ce ressort 2 est monté classiquement entre, à une première extrémité 21 un tambour 3 de barillet, et à une deuxième extrémité 22 une surface de réception 5 que comporte une bonde 4 de barillet coaxiale à ce tambour 3 autour d'un axe de pivotement D.  The invention relates to a barrel 1 watch assembly, comprising a mainspring 2 barrel. This spring 2 is conventionally mounted between, at a first end 21 a barrel drum 3, and at a second end 22 a receiving surface 5 that includes a barrel plug 4 coaxial with the drum 3 about a pivot axis D .
Ce ressort 2 est réalisé dans un alliage multiphasé à base cobalt-nickel- chrome, comportant de 44 à 46% de cobalt, de 20 à 22% de nickel, de 17 à 19% de chrome, de 4 à 6% de fer, de 3 à 5% de tungstène, de 3 à 5% de molybdène, de 0 à 2% de titane, de 0 à 1 % de béryllium, et de module d'Young compris entre 200 et 240 GPa et un module de cisaillement compris entre 80 et 100 GPa. Ce ressort 2 a un rapport largeur/épaisseur compris entre 3 et 23, et en particulier entre 9 et 21 . La bonde 4 est en acier ou en acier inoxydable, Le rayon maximal de la bonde 4 par rapport au axe de pivotement D est inférieur à dix fois l'épaisseur maximale du ressort 2, et de préférence inférieur à huit fois cette épaisseur, grâce aux dispositions décrites ci-après.  This spring 2 is made of a cobalt-nickel-chromium-based multiphase alloy comprising from 44 to 46% of cobalt, from 20 to 22% of nickel, from 17 to 19% of chromium, from 4 to 6% of iron, from 3 to 5% of tungsten, from 3 to 5% of molybdenum, from 0 to 2% of titanium, from 0 to 1% of beryllium, and from Young's modulus of between 200 and 240 GPa and a shear modulus included between 80 and 100 GPa. This spring 2 has a width / thickness ratio of between 3 and 23, and in particular between 9 and 21. The bung 4 is made of steel or stainless steel. The maximum radius of the bung 4 with respect to the pivot axis D is less than ten times the maximum thickness of the spring 2, and preferably less than eight times this thickness, thanks to provisions described below.
La bonde 4 comporte successivement, depuis une première extrémité 86, vers une deuxième extrémité 87 :  The plug 4 comprises successively, from a first end 86, to a second end 87:
- des moyens de fixation 120 d'un rochet 12, ou/et une première portée de pivotement 181 dans une platine 10 ou un pont 10A d'un mécanisme horloger, fastening means 120 of a ratchet 12, and / or a first pivoting surface 181 in a plate 10 or a bridge 10A of a clock mechanism,
- puis une portée 43 de pivotement par rapport à un alésage 35 du tambour 3, - puis une collerette 40 saillante radialement par rapport à la portée 43 et coopérant en appui avec une face interne 31 que comporte le tambour 3 du côté du au moins un ressort 2, - then a bearing surface 43 of pivoting relative to a bore 35 of the drum 3, - Then a collar 40 protruding radially from the bearing surface 43 and cooperating in abutment with an inner face 31 that includes the drum 3 on the side of the at least one spring 2,
- puis, en affleurement ou en retrait radialement par rapport à la collerette 40, la surface de réception 5 du au moins un ressort 2,  - Then, flush with or retracted radially from flange 40, the receiving surface 5 of the at least one spring 2,
- puis, en retrait radialement par rapport à la surface de réception 5, une portée 44 de pivotement par rapport à un alésage 75 d'un couvercle 7 agencé pour constituer avec le tambour 3 une chambre 32 contenant le au moins un ressort moteur 2,  - Then, radially recessed with respect to the receiving surface 5, a bearing surface 44 pivoted relative to a bore 75 of a cover 7 arranged to constitute with the drum 3 a chamber 32 containing the at least one mainspring 2,
- puis une deuxième portée de pivotement 182 dans une platine ou un pont then a second pivoting surface 182 in a plate or a bridge
10A du mécanisme horloger. 10A of the watch mechanism.
Dans la réalisation de la figure 1 , l'arbre de barillet 4 est monobloc, et comporte une collerette 40 d'appui sur la face intérieure 31 du tambour 3, et dont le diamètre de collerette est supérieur au diamètre enveloppe de la surface d'appui du ressort 2, laquelle inclut le crochet 41 . Cette collerette 40 ne constitue pas cette surface d'appui du ressort 2.  In the embodiment of FIG. 1, the barrel shaft 4 is in one piece, and has a bearing flange 40 on the inner face 31 of the drum 3, and whose flange diameter is greater than the envelope diameter of the surface of the barrel. spring support 2, which includes hook 41. This flange 40 does not constitute this bearing surface of the spring 2.
Cette collerette 40 limite l'ébat entre l'arbre 4 et le tambour 3 dans un sens, la limitation dans l'autre sens est effectuée par un épaulement 49 de l'arbre avec un bossage intérieur 79 du couvercle 7.  This flange 40 limits the frost between the shaft 4 and the drum 3 in one direction, the limitation in the other direction is effected by a shoulder 49 of the shaft with an inner boss 79 of the cover 7.
L'essentiel du volume de la chambre 32 est réservé au ressort 2, et la surface d'appui du ressort peut être de diamètre plus petit que sur les barillets connus.  Most of the volume of the chamber 32 is reserved for the spring 2, and the bearing surface of the spring may be smaller in diameter than the known barrels.
Dans la variante illustrée par la figure 1 , le diamètre extérieur de la bonde 4 est dégressif par paliers depuis la collerette 40 jusqu'à la deuxième extrémité 87.  In the variant illustrated in Figure 1, the outer diameter of the plug 4 is gradually decreasing from the flange 40 to the second end 87.
Dans un exemple de réalisation tel que visible sur la figure 2, le diamètre extérieur de la bonde 4 est dégressif par paliers depuis la collerette 40 jusqu'à la première extrémité 86. La collerette 40 coopère en appui avec une face interne 31 dans un épaulement du tambour 3.  In an exemplary embodiment as visible in Figure 2, the outer diameter of the plug 4 is gradually decreasing from the flange 40 to the first end 86. The flange 40 cooperates in abutment with an inner face 31 in a shoulder drum 3.
La réalisation selon la figure 2 est une variante de la figure 1 , avec une portée supplémentaire pour guidage de l'arbre dans le pont, au-dessus de la portée ménagée au niveau du tambour.  The embodiment according to Figure 2 is a variant of Figure 1, with an additional bearing for guiding the shaft in the bridge, above the scope formed at the drum.
L'invention permet l'amélioration de la réserve de marche de calibres existants, sans modification majeure de ceux-ci. Par exemple, une exécution particulière, pour l'application de l'invention au barillet du calibre « Frédéric Piguet 1 180 BLANCPAIN », faite sans modifier le couvercle du barillet, correspond à un diamètre 401 d'une valeur de 1 ,80 mm, et d'un diamètre 501 d'une valeur de 1 ,20 mm. The invention allows the improvement of the power reserve of existing calibers, without major modification thereof. For example, a particular embodiment, for the application of the invention to the barrel of the caliber "Frédéric Piguet 1 180 BLANCPAIN", made without modifying the lid of the barrel, corresponds to a diameter 401 with a value of 1.80 mm, and a diameter 501 with a value of 1.20 mm.
Tel que visible sur la figure 1 , dans une variante particulière, la portée 43 constitue la portée de plus grand diamètre après la collerette 40. De préférence, le diamètre de la portée 43 est supérieur au plus grand diamètre de la surface d'appui 5 du ressort 2.  As can be seen in FIG. 1, in a particular variant, the span 43 constitutes the range of larger diameter after the flange 40. Preferably, the diameter of the span 43 is greater than the largest diameter of the bearing surface 5 of the spring 2.
Avantageusement, l'ensemble barillet 1 comporte des moyens d'extraction 190, qui sont agencés pour permettre l'extraction axiale de la bonde 4, selon l'axe de pivotement D, par l'exercice d'un effort de poussée ou de traction sur la bonde 4.  Advantageously, the barrel assembly 1 comprises extraction means 190, which are arranged to allow the axial extraction of the bung 4, along the pivot axis D, by the exercise of a thrust or traction force. on the bung 4.
Sur les figures 4 et 5, dans une réalisation non limitative, ces moyens d'extraction 190 sont constitués par au moins une gorge 191 ou/et un épaulement que comporte la bonde 4 à proximité de la deuxième extrémité 87 et au-delà de la portée 44. Ces deux figures illustrent une bonde en au moins trois parties : une partie supérieure de bonde hors du tambour, avec épaulement de prise d'appui sur le côté du pont opposé au barillet, et chassée ou vissée dans une partie médiane. Cette partie médiane, entre tambour et couvercle, porteuse du ressort, soit directement (figure 4), soit indirectement par bague rapportée (figure 5) : cette partie médiane est munie des moyens d'extraction 190 sous forme d'une gorge à l'extrémité opposée à la partie supérieure. Une partie inférieure de guidage dans la platine, est chassée ou vissée dans la partie médiane.  In FIGS. 4 and 5, in a nonlimiting embodiment, these extraction means 190 are constituted by at least one groove 191 and / or a shoulder that comprises the bung 4 near the second end 87 and beyond the Scope 44. These two figures illustrate a bung in at least three parts: an upper part of the bung out of the drum, with bearing shoulder on the side of the bridge opposite the barrel, and driven or screwed in a middle part. This middle part, between drum and cover, carrying the spring, either directly (Figure 4), or indirectly by insert ring (Figure 5): this middle part is provided with the extraction means 190 in the form of a groove to the opposite end to the top. A lower guide portion in the plate, is driven or screwed into the middle part.
Les figures 4A et 5A illustrent une réalisation en deux parties avec arbre traversant.  Figures 4A and 5A illustrate a two-part embodiment with through shaft.
De préférence, le ressort 2 est enfermé dans une chambre 32 délimitée par le tambour 3 et un couvercle 7 fixé sur le tambour 3, et la bonde 4 comporte une seconde partie arbrée externe 44 inférieure sur laquelle coulisse un alésage 75 du couvercle 7.  Preferably, the spring 2 is enclosed in a chamber 32 delimited by the drum 3 and a cover 7 fixed on the drum 3, and the bung 4 comprises a second outer shaft portion 44 on which a bore 75 of the lid 7 slides.
Dans une variante illustrée par la figure 6, on a un arbre lisse, porteur d'une bonde à collerette, entre tambour et couvercle. Cette collerette constitue une surface de butée avec une surface intérieure du tambour. La bonde 4 est ainsi réalisée en au moins deux parties, l'une première partie 4A de diamètre inférieur au plus petit des deux diamètres du alésage 35 du tambour 3 et du alésage 75 d'un couvercle 7, et l'autre deuxième partie 4B, qui peut être sensiblement tubulaire, comportant un alésage chassé sur la première partie 4A. Cette deuxième partie 4B, ou bien comporte la surface de réception 5 du ressort moteur 2, ou bien constitue l'extrémité interne du ressort moteur 2. In a variant illustrated in Figure 6, there is a smooth shaft carrying a bung flange between drum and cover. This flange constitutes an abutment surface with an inner surface of the drum. The plug 4 is thus made of at least two parts, the first part 4A of smaller diameter than the smaller of the two diameters of the bore 35 of the drum 3 and the bore 75 of a cover 7, and the other part 2B , Which may be substantially tubular, having a bore driven on the first part 4A. This second part 4B, or comprises the receiving surface 5 of the mainspring 2, or constitutes the inner end of the mainspring 2.
Dans la variante illustrée à la figure 3, l'arbre est en deux parties : une partie supérieure, avec guidage dans pont et rochet monobloc, vissée dans une partie inférieure sensiblement limitée au volume de la chambre du ressort.  In the variant illustrated in Figure 3, the shaft is in two parts: an upper part, with guide in bridge and one-piece ratchet, screwed into a lower portion substantially limited to the volume of the spring chamber.
La bonde 4 est ainsi réalisée en au moins deux parties, de préférence une de ces deux parties est entièrement dans la chambre 32. L'une première partie 4A intérieure comporte les moyens de fixation 120 d'un rochet 12 ou constitue le rochet 12, et comporte la première portée de pivotement 181 dans le pont 10A 10 ou dans une pierre du pont 10A. Cette première partie 4A comporte une portée de centrage 183 et un filetage 185, respectivement un taraudage, selon l'axe de pivotement D.  The bung 4 is thus made of at least two parts, preferably one of these two parts is entirely in the chamber 32. The first inner part 4A comprises the attachment means 120 of a ratchet 12 or constitutes the ratchet 12, and has the first pivoting surface 181 in the bridge 10A 10 or in a bridge stone 10A. This first part 4A comprises a centering surface 183 and a thread 185, respectively a tapping, along the pivot axis D.
L'autre deuxième partie 4B, qui peut être sensiblement tubulaire, comporte un alésage de centrage 184 ajusté sur la portée de centrage 183, et comporte un taraudage 186, respectivement un filetage, complémentaire au filetage 185, respectivement taraudage, de la première partie 4A. Cette deuxième partie 4B est porteuse de la portée 43, de la collerette 40, de la surface de réception 5 du ressort moteur 2 ou bien constitue l'extrémité interne du ressort moteur 2, et est encore porteuse de la portée 44, et de la deuxième portée de pivotement 182.  The other second portion 4B, which may be substantially tubular, comprises a centering bore 184 fitted to the centering surface 183, and comprises a tapping 186, respectively a thread, complementary to the thread 185, respectively tapping, of the first part 4A. . This second part 4B carries the bearing surface 43, the collar 40, the receiving surface 5 of the driving spring 2 or constitutes the inner end of the driving spring 2, and is still carrying the bearing surface 44, and the second pivoting range 182.
Dans une autre variante, la bonde 4 est réalisée en au moins deux parties, l'une première partie 4A comportant un arbre de barillet 18 cylindrique ou tubulaire et comportant à ses deux extrémités axiales opposées la première portée de pivotement 181 et la deuxième portée de pivotement 182, qui sont ou bien monobloc avec l'arbre de barillet ou bien rapportées sur ce dernier par vissage ou/et frettage ou/et soudage. L'autre deuxième partie 4B porte la portée 43, la collerette 40, comporte la surface de réception 5 du ressort moteur 2 ou bien constitue l'extrémité interne du ressort moteur 2, et porte encore la portée 44. Cette deuxième partie 4B comportant un alésage chassé sur la première partie 4A.  In another variant, the bung 4 is made of at least two parts, the first part 4A having a cylindrical or tubular barrel shaft 18 and having at its two opposite axial ends the first pivoting surface 181 and the second bearing surface pivot 182, which are either monobloc with the barrel shaft or reported on the latter by screwing and / or shrinking or / and welding. The other second part 4B carries the bearing surface 43, the collar 40, comprises the receiving surface 5 of the motor spring 2 or constitutes the inner end of the driving spring 2, and still carries the bearing surface 44. This second portion 4B comprising a bore bored on the first part 4A.
Avantageusement, la première partie 4A est réalisée monobloc avec un porte-rochet 81 ou avec un rochet 12.  Advantageously, the first part 4A is made in one piece with a ratchet holder 81 or with a ratchet 12.
Tel que visible sur les figures 7 à 9, l'extrémité supérieure de l'arbre comporte des plats d'entraînement de gorges correspondantes du rochet, qui sont situées en partie inférieure, du rochet, côté tambour. Ainsi, la deuxième partie 4B comporte avantageusement des moyens d'entraînement 187 en pivotement de la première partie 4A ou/et d'un rochet 12 agencés pour coopérer avec des moyens d'entraînement complémentaires 188 que comporte la première partie 4A ou le rochet 12, et pour assurer aussi bien un contact en pivotement qu'un contact dans la direction axiale de l'axe de pivotement D. Dans le cas des figures, un dégagement 188 réalisé dans le rochet 12 par un train de fraises coopère avec un profil 187 comportant deux plats fraisé à l'extrémité de la bonde. As shown in Figures 7 to 9, the upper end of the shaft has corresponding groove driving plates of the ratchet, which are located in the lower part of the ratchet, drum side. Thus, the second portion 4B advantageously comprises driving means 187 pivoting the first portion 4A or / and a ratchet 12 arranged to cooperate with complementary drive means 188 that includes the first portion 4A or ratchet 12 and to provide both a pivotal contact and a contact in the axial direction of the pivot axis D. In the case of the figures, a clearance 188 made in the ratchet 12 by a drill bit train cooperates with a profile 187 having two dishes milled at the end of the bung.
Cette réalisation selon les figures 7 à 9 convient particulièrement bien à de très petits calibres, tel le « 615 BLANCPAIN », notamment pour montre de dame, en effet, grâce à l'invention il est possible de réduire le diamètre 502 à 1 ,00 mm. Le diamètre 121 de la figure 8 a une valeur de 0,60 mm, et le diamètre 122 a une valeur de 0,35 mm seulement. Il est possible de passer un couple de 2 mN.m, sur un rayon d'environ 0,25 mm, tel que représenté en pointillé sur la figure 8, ce qui représente un effort de 4N sur chaque contact vertical.  This embodiment according to FIGS. 7 to 9 is particularly suitable for very small calibres, such as the "615 BLANCPAIN", especially for ladies' watches, because, thanks to the invention, it is possible to reduce the diameter 502 to 1.00. mm. The diameter 121 of FIG. 8 has a value of 0.60 mm, and the diameter 122 has a value of only 0.35 mm. It is possible to pass a torque of 2 mN.m, over a radius of about 0.25 mm, as shown in dashed lines in FIG. 8, which represents a force of 4N on each vertical contact.
L'application au même calibre de la confection de l'arbre selon la variante de la figure 1 permet de gagner au moins 0,10 mm au diamètre par rapport à l'existant, sans changer les matériaux du ressort ni des composants ; à titre d'exemple, le diamètre 401 de la figure 1 peut être réalisé à 0,80 mm, le diamètre de la portée 44 à 0,5 mm, et le diamètre de la portée 182 à 0,30 mm.  Application to the same caliber of the construction of the shaft according to the variant of Figure 1 makes it possible to gain at least 0.10 mm in diameter compared to existing, without changing the materials of the spring or components; for example, the diameter 401 of Figure 1 can be made to 0.80 mm, the diameter of the scope 44 to 0.5 mm, and the diameter of the range 182 to 0.30 mm.
Sur les figures 10 et 1 1 , l'arbre est porteur d'une collerette, entre tambour et couvercle. Cette collerette constitue une surface de butée avec une surface intérieure du tambour, comme sur la figure 6. La collerette comporte une découpe permettant l'usinage du crochet d'accrochage du ressort sur une zone de diamètre inférieure à celui de la collerette, qui appartient, soit à l'arbre lui-même s'il est monobloc, soit à une bague rapportée sur cet arbre comme dans le cas des figures.  In Figures 10 and 1 1, the shaft carries a flange, between drum and cover. This flange constitutes an abutment surface with an inner surface of the drum, as in FIG. 6. The flange comprises a cutout allowing the hooking hook of the spring to be machined over a zone of diameter smaller than that of the flange, which belongs to either to the shaft itself if it is monobloc, or to a ring attached to this shaft as in the case of the figures.
Dans la réalisation avantageuse en termes de coûts d'usinage de la figure 10, la deuxième partie 4B est elle-même constituée de plusieurs parties coaxiales dont l'une est réalisée sous forme de bague et porte un crochet 41 d'accrochage d'un coquillon que comporte le au moins un ressort 2.  In the advantageous embodiment in terms of the machining costs of FIG. 10, the second part 4B itself consists of several coaxial parts, one of which is in the form of a ring and carries a hook 41 for hooking a shell that includes the at least one spring 2.
Tel que visible sur la figure 1 1 , dans une réalisation monobloc, la surface de réception 5 porte un crochet 41 d'accrochage d'un coquillon que comporte le au moins un ressort 2, et la bonde 4 comporte, au droit du crochet 41 , et notamment au niveau de la collerette 40, un dégagement 52 pour le passage d'une fraise ou d'un train de fraises pour l'usinage du crochet 41 . As can be seen in FIG. 11, in a one-piece embodiment, the receiving surface 5 carries a hook 41 for hooking a shell that comprises the at least one spring 2, and the plug 4 comprises, at the right of the hook 41. , and in particular at the flange 40, a clearance 52 for the passage of a milling cutter or a drill bit for machining the hook 41.
Dans une variante de l'invention, le rochet 12 est monobloc avec la bonde 4.  In a variant of the invention, the ratchet 12 is integral with the bung 4.
Dans une variante de l'invention, la surface de réception 5 est une surface de révolution par rapport à l'axe de pivotement D.  In a variant of the invention, the receiving surface 5 is a surface of revolution with respect to the pivot axis D.
Dans une variante de l'invention, le ressort 2 est fixé à la bonde 4 par friction.  In a variant of the invention, the spring 2 is fixed to the bung 4 by friction.
Dans une variante avantageuse de l'invention, le ressort 2 forme avec la bonde 4 un sous-ensemble ressort-bonde monobloc indémontable soudé ou brasé, ou similaire.  In an advantageous variant of the invention, the spring 2 forms with the bung 4 a welded or brazed unbreakable monobloc spring-bung subassembly, or the like.
L'invention concerne encore un mouvement d'horlogerie 100 comportant au moins un tel ensemble barillet 1 pour le stockage d'énergie avec une entrée constituée, ou bien par un rochet 12 monté solidaire en pivotement de la bonde 4 ou d'un arbre de barillet 18 solidaire de la bonde 4, ou bien par une denture de tambour 13 solidaire en pivotement du tambour 3, et une sortie constituée respectivement, ou bien par une denture de tambour 13 solidaire en pivotement du tambour 3, ou bien par un rochet 12 monté solidaire en pivotement de la bonde 4 ou de l'arbre de barillet 18.  The invention also relates to a watchmaking movement 100 comprising at least one such barrel assembly 1 for storing energy with an incorporated input, or else a ratchet 12 pivotally mounted on the bung 4 or a spindle. barrel 18 secured to the bung 4, or by a toothing drum 13 pivotally integral with the drum 3, and an outlet constituted respectively, or by a toothing drum 13 pivotally integral drum 3, or by a ratchet 12 mounted pivotally connected to the bung 4 or to the barrel shaft 18.
L'invention concerne encore une pièce d'horlogerie 1000 comportant au moins un tel mouvement d'horlogerie 100 ou/et au moins un tel ensemble barillet 1 pour le stockage d'énergie avec une entrée constituée, ou bien par un rochet 12 monté solidaire en pivotement de la bonde 4 ou d'un arbre de barillet 18 solidaire de la bonde 4, ou bien par une denture de tambour 13 solidaire en pivotement du tambour 3, et une sortie constituée respectivement, ou bien par une denture de tambour 13 solidaire en pivotement du tambour 3, ou bien par un rochet 12 monté solidaire en pivotement de la bonde 4 ou de l'arbre de barillet 18.  The invention also relates to a timepiece 1000 comprising at least one watch movement 100 and / or at least one such barrel assembly 1 for energy storage with an incorporated input, or a ratchet 12 mounted solidarity pivoting the bung 4 or a barrel shaft 18 secured to the bung 4, or by a toothing drum 13 pivotally integral with the drum 3, and an output constituted respectively, or by a solid drum toothing 13 in pivoting drum 3, or by a ratchet 12 mounted pivotally integral with the bung 4 or the barrel shaft 18.

Claims

REVE N D I CATI ONS REVE NDI CATI ONS
1 . Ensemble barillet (1 ) d'horlogerie, comportant au moins un ressort moteur (2) de barillet monté entre, à une première extrémité (21 ) un tambour (3) de barillet, et à une deuxième extrémité (22) une surface de réception (5) que comporte une bonde (4) de barillet, coaxiale audit tambour (3) autour d'un axe de pivotement (D), caractérisé en ce que ledit ressort est réalisé dans un alliage multiphasé à base cobalt-nickel-chrome, comportant de 44 à 46% de cobalt, de 20 à 22% de nickel, de 17 à 19% de chrome, de 4 à 6% de fer, de 3 à 5% de tungstène, de 3 à 5% de molybdène, de 0 à 2% de titane, de 0 à 1 % de béryllium, et de module d'Young compris entre 200 et 240 GPa et un module de cisaillement compris entre 80 et 100 GPa, et ayant un rapport largeur/épaisseur compris entre 9 et 21 , et en ce que ladite bonde est en acier ou en acier inoxydable, et en ce que le rayon maximal de ladite bonde (4) par rapport audit axe de pivotement (D) est inférieur à dix fois l'épaisseur maximale dudit ressort (2), encore caractérisé en ce que ladite bonde (4) comporte successivement, depuis une première extrémité (86), vers une deuxième extrémité (87) : 1. A watch cylinder assembly (1) comprising at least one mainspring (2) mounted between a drum (3) at a first end (21) and a receiving surface (22) at a second end (22). (5) comprises a plug (4) barrel, coaxial with said drum (3) about a pivot axis (D), characterized in that said spring is made of a cobalt-nickel-chromium-based multiphase alloy, with 44 to 46% cobalt, 20 to 22% nickel, 17 to 19% chromium, 4 to 6% iron, 3 to 5% tungsten, 3 to 5% molybdenum, 0 to 2% of titanium, 0 to 1% of beryllium, and Young's modulus of between 200 and 240 GPa and a shear modulus of between 80 and 100 GPa, and having a width / thickness ratio of between 9 and 21, and in that said bung is made of steel or stainless steel, and in that the maximum radius of said bung (4) with respect to said pivot axis (D) is less than ten times the maximum thickness of said spring (2), further characterized in that said bung (4) comprises successively, from a first end (86), towards a second end (87):
- des moyens de fixation (120) d'un rochet (12), ou/et une première portée de pivotement (181 ) dans une platine (10) ou un pont (10A) d'un mécanisme horloger,  - means (120) for fastening a ratchet (12), and / or a first pivoting surface (181) in a plate (10) or a bridge (10A) of a clock mechanism,
- puis une portée (43) de pivotement par rapport à un alésage (35) dudit tambour (3),  - then a bearing surface (43) with respect to a bore (35) of said drum (3),
- puis une collerette (40) saillante radialement par rapport à ladite portée (43) et coopérant en appui avec une face interne (31 ) que comporte ledit tambour (3) du côté dudit au moins un ressort (2),  - Then a flange (40) projecting radially from said bearing surface (43) and cooperating in abutment with an inner face (31) that comprises said drum (3) on the side of said at least one spring (2),
- puis, en affleurement ou en retrait radialement par rapport à ladite collerette (40), ladite surface de réception (5) dudit au moins un ressort (2),  - Then, flush or recessed radially relative to said flange (40), said receiving surface (5) of said at least one spring (2),
- puis, en retrait radialement par rapport à ladite surface de réception (5), une portée (44) de pivotement par rapport à un alésage (75) d'un couvercle (7) agencé pour constituer avec ledit tambour (3) une chambre (32) contenant ledit au moins un ressort moteur (2),  - Then, radially recessed with respect to said receiving surface (5), a bearing surface (44) with respect to a bore (75) of a cover (7) arranged to constitute with said drum (3) a chamber (32) containing said at least one mainspring (2),
- puis une deuxième portée de pivotement (182) dans une platine ou un pont (10A) dudit mécanisme horloger.  and then a second pivoting surface (182) in a plate or a bridge (10A) of said clock mechanism.
2. Ensemble barillet (1 ) selon la revendication précédente, caractérisé en ce que le diamètre extérieur de ladite bonde (4) est dégressif par paliers depuis ladite collerette (40) jusqu'à ladite deuxième extrémité (87), et est dégressif par paliers depuis ladite collerette (40) jusqu'à ladite première extrémité (86). 2. barrel assembly (1) according to the preceding claim, characterized in that the outer diameter of said bung (4) is decreasing stepwise since said flange (40) to said second end (87), and is stepwise decreasing from said flange (40) to said first end (86).
3. Ensemble barillet (1 ) selon l'une des revendications précédentes, caractérisé en ce que ladite portée (43) de pivotement par rapport à un alésage (35) dudit tambour (3) constitue la portée de plus grand diamètre après ladite collerette (40).  3. A barrel assembly (1) according to one of the preceding claims, characterized in that said bearing surface (43) with respect to a bore (35) of said drum (3) constitutes the larger diameter bearing after said collar ( 40).
4. Ensemble barillet (1 ) selon l'une des revendications précédentes, caractérisé en ce qu'il comporte des moyens d'extraction (190) agencés pour permettre l'extraction axiale de ladite bonde (4), selon ledit axe de pivotement (D), par l'exercice d'un effort de traction sur ladite bonde (4).  4. barrel assembly (1) according to one of the preceding claims, characterized in that it comprises extraction means (190) arranged to allow the axial extraction of said bung (4) along said pivot axis ( D), by the exercise of a tensile force on said bung (4).
5. Ensemble barillet (1 ) selon la revendication précédente, caractérisé en ce que lesdits moyens d'extraction (190) sont constitués par au moins une gorge (191 ) ou/et un épaulement que comporte ladite bonde (4) à proximité de ladite deuxième extrémité (87) et au-delà de ladite portée (44) de pivotement par rapport à un alésage (75) dudit couvercle (7).  5. Barrel assembly (1) according to the preceding claim, characterized in that said extraction means (190) are constituted by at least one groove (191) or / and a shoulder that includes said bung (4) near said second end (87) and beyond said pivoting surface (44) relative to a bore (75) of said cover (7).
6. Ensemble barillet (1 ) selon l'une des revendications précédentes, caractérisé en ce que ladite bonde (4) est réalisée en deux parties, l'une première partie (4A) de diamètre inférieur au plus petit des deux diamètres dudit alésage (35) dudit tambour (3) et dudit alésage (75) d'un couvercle (7), et l'autre deuxième partie (4B) comportant un alésage chassé sur ladite première partie (4A) et laquelle deuxième partie (4B), ou bien comporte ladite surface de réception (5) dudit ressort moteur (2), ou bien constitue l'extrémité interne dudit ressort moteur (2).  6. Barrel assembly (1) according to one of the preceding claims, characterized in that said plug (4) is made in two parts, the first portion (4A) of smaller diameter than the smaller of the two diameters of said bore ( 35) of said drum (3) and said bore (75) of a lid (7), and the other second portion (4B) having a bore driven on said first portion (4A) and which second portion (4B), or has well said receiving surface (5) of said mainspring (2), or is the inner end of said mainspring (2).
7. Ensemble barillet (1 ) selon l'une des revendications 1 à 5, caractérisé en ce que ladite bonde (4) est réalisée en deux parties, l'une première partie (4A) dite intérieure comportant lesdits moyens de fixation (120) d'un rochet (12) ou constituant ledit rochet (12), et comportant ladite première portée de pivotement (181 ), ladite première partie (4A) comportant une portée de centrage (183) et un filetage (185), respectivement un taraudage, selon ledit axe de pivotement (D), et l'autre deuxième partie (4B) comportant un alésage de centrage (184) ajusté sur ladite portée de centrage (183), et comportant un taraudage (186), respectivement un filetage, complémentaire audit filetage (185), respectivement taraudage, de ladite première partie (4A), ladite deuxième partie (4B) étant porteuse de ladite portée (43) de pivotement par rapport à un alésage (35) dudit tambour (3), de ladite collerette (40), de ladite surface de réception (5) dudit ressort moteur (2) ou bien constituant l'extrémité interne dudit ressort moteur (2), et étant encore porteuse de ladite portée (44) de pivotement par rapport à un alésage (75) dudit couvercle (7), et de ladite deuxième portée de pivotement (182). 7. A barrel assembly (1) according to one of claims 1 to 5, characterized in that said bung (4) is made in two parts, the first part (4A) said inner having said fixing means (120) a ratchet (12) or constituting said ratchet (12), and having said first pivoting surface (181), said first portion (4A) having a centering surface (183) and a thread (185), respectively a tapping along said pivot axis (D), and the other second portion (4B) having a centering bore (184) fitted to said centering surface (183), and having a thread (186), respectively a thread, complementary said thread (185), respectively tapped, of said first portion (4A), said second portion (4B) carrying said pivoting bearing surface (43) with respect to a bore (35) of said drum (3), said collar (40), of said receiving surface (5) of said mainspring (2) or well constituting the inner end of said mainspring (2), and still carrying said bearing surface (44) with respect to a bore (75) of said cover (7), and said second pivoting surface (182).
8. Ensemble barillet (1 ) selon l'une des revendications 1 à 5, caractérisé en ce que ladite bonde (4) est réalisée en deux parties, l'une première partie (4A) comportant un arbre de barillet (18) cylindrique ou tubulaire et comportant à ses deux extrémités axiales opposées ladite première portée de pivotement (181 ) et ladite deuxième portée de pivotement (182), qui sont ou bien monobloc avec ledit arbre de barillet ou bien rapportées sur ce dernier par vissage ou/et frettage ou/et soudage, et l'autre deuxième partie (4B) qui porte ladite portée (43) de pivotement par rapport à un alésage (35) dudit tambour (3), ladite collerette (40), comporte ladite surface de réception (5) dudit ressort moteur (2) ou bien constitue l'extrémité interne dudit ressort moteur (2), et porte encore ladite portée (44) de pivotement par rapport à un alésage (75) dudit couvercle (7), ladite deuxième partie (4B) comportant un alésage chassé sur ladite première partie (4A)  Barrel assembly (1) according to one of claims 1 to 5, characterized in that said plug (4) is made in two parts, the first part (4A) having a cylinder shaft (18) cylindrical or tubular and having at its two opposite axial ends said first pivoting surface (181) and said second pivoting surface (182), which are either integral with said barrel shaft or attached thereto by screwing and / or shrinking or and welding, and the other second part (4B) which carries said bearing surface (43) with respect to a bore (35) of said drum (3), said collar (40), comprises said receiving surface (5) of said motor spring (2) or constitutes the inner end of said motor spring (2), and still carries said pivoting surface (44) with respect to a bore (75) of said cover (7), said second portion (4B) having a bore driven on said first portion (4A)
9. Ensemble barillet (1 ) selon la revendication précédente, caractérisé en ce que ladite première partie (4A) est réalisée monobloc avec un porte-rochet (81 ) ou avec un dit rochet (12).  9. A barrel assembly (1) according to the preceding claim, characterized in that said first portion (4A) is made in one piece with a ratchet holder (81) or with a said ratchet (12).
10. Ensemble barillet (1 ) selon la revendication 8 ou 9, caractérisé en ce que ladite deuxième partie (4B) comporte des moyens d'entraînement (187) en pivotement de ladite première partie (4A) ou/et d'un dit rochet (12) agencés pour coopérer avec des moyens d'entraînement complémentaires (188) que comporte ladite première partie (4A) ou ledit rochet (12), et pour assurer aussi bien un contact en pivotement qu'un contact dans la direction axiale dudit axe de pivotement (D).  10. A barrel assembly (1) according to claim 8 or 9, characterized in that said second portion (4B) comprises drive means (187) pivoting said first portion (4A) or / and a said ratchet (12) arranged to cooperate with complementary drive means (188) that includes said first portion (4A) or said ratchet (12), and to provide both a pivotal contact and a contact in the axial direction of said axis pivoting (D).
11 . Ensemble barillet (1 ) selon l'une des revendications 6 à 10, caractérisé en ce que ladite deuxième partie (4B) est elle-même constituée de plusieurs parties coaxiales dont l'une est réalisée sous forme de bague et porte un crochet (41 ) d'accrochage d'un coquillon que comporte ledit au moins un ressort (2).  11. Barrel assembly (1) according to one of claims 6 to 10, characterized in that said second portion (4B) itself consists of several coaxial parts, one of which is in the form of a ring and carries a hook (41 ) hooking a shell that comprises said at least one spring (2).
12. Ensemble barillet (1 ) selon l'une des revendications précédentes, caractérisé en ce que ladite surface de réception (5) porte un crochet (41 ) d'accrochage d'un coquillon que comporte ledit au moins un ressort (2), et que la collerette (40) de ladite bonde (4) comporte, au droit dudit crochet (41 ), un dégagement (52) pour le passage d'une fraise ou d'un train de fraises pour l'usinage dudit crochet (41 ). 12. A barrel assembly (1) according to one of the preceding claims, characterized in that said receiving surface (5) carries a hook (41) for hooking a shell that comprises said at least one spring (2), and that the flange (40) of said bung (4) comprises, at the right of said hook (41), a clearance (52) for the passage of a milling cutter or drill string for machining said hook (41).
13. Ensemble barillet (1 ) selon l'une des revendications précédentes, caractérisé en ce que ledit rochet (12) est monobloc avec ladite bonde (4).  13. Barrel assembly (1) according to one of the preceding claims, characterized in that said ratchet (12) is integral with said bung (4).
14. Ensemble barillet (1 ) selon l'une des revendications précédentes, caractérisé en ce que ladite surface de réception (5) est une surface de révolution par rapport audit axe de pivotement (D).  14. Barrel assembly (1) according to one of the preceding claims, characterized in that said receiving surface (5) is a surface of revolution relative to said pivot axis (D).
15. Ensemble barillet (1 ) selon l'une des revendications précédentes, caractérisé en ce que ledit ressort (2) est fixé à ladite bonde (4) par friction.  15. Barrel assembly (1) according to one of the preceding claims, characterized in that said spring (2) is fixed to said bung (4) by friction.
16. Ensemble barillet (1 ) selon l'une des revendications 1 à 14, caractérisé en ce que ledit ressort (2) et ladite bonde (4) forment un sous- ensemble ressort-bonde monobloc indémontable soudé ou brasé.  16. A barrel assembly (1) according to one of claims 1 to 14, characterized in that said spring (2) and said bung (4) form a welded or soldered unbreakable monobloc spring-bung subassembly.
17. Mouvement d'horlogerie (100) comportant au moins un ensemble barillet (1 ) selon l'une des revendications précédentes pour le stockage d'énergie avec une entrée constituée, ou bien par un rochet (12) monté solidaire en pivotement de ladite bonde (4) ou d'un arbre de barillet (18) solidaire de ladite bonde (4), ou bien par une denture de tambour (13) solidaire en pivotement dudit tambour (3), et une sortie constituée respectivement, ou bien par une denture de tambour (13) solidaire en pivotement dudit tambour (3), ou bien par un rochet (12) monté solidaire en pivotement de ladite bonde (4) ou dudit arbre de barillet (18).  17. Watchmaking movement (100) comprising at least one barrel assembly (1) according to one of the preceding claims for storing energy with an incorporated inlet, or by a ratchet (12) pivotably mounted on said bung (4) or a barrel shaft (18) integral with said bung (4), or by a toothing drum (13) pivotally integral with said drum (3), and an output constituted respectively, or by a toothing drum (13) pivotally integral with said drum (3), or by a ratchet (12) pivotally mounted integral with said bung (4) or said barrel shaft (18).
18. Pièce d'horlogerie (1000) comportant au moins un mouvement d'horlogerie (100) selon la revendication 17 ou/et au moins un ensemble barillet (1 ) selon l'une des revendications 1 à 16 pour le stockage d'énergie avec une entrée constituée, ou bien par un rochet (12) monté solidaire en pivotement de ladite bonde (4) ou d'un arbre de barillet (18) solidaire de ladite bonde (4), ou bien par une denture de tambour (13) solidaire en pivotement dudit tambour (3), et une sortie constituée respectivement, ou bien par une denture de tambour (13) solidaire en pivotement dudit tambour (3), ou bien par un rochet (12) monté solidaire en pivotement de ladite bonde (4) ou dudit arbre de barillet (18).  18. Timepiece (1000) comprising at least one watch movement (100) according to claim 17 and / or at least one barrel assembly (1) according to one of claims 1 to 16 for energy storage. with an inlet constituted, or by a ratchet (12) pivotally mounted to said bung (4) or a barrel shaft (18) integral with said bung (4), or by a toothing drum (13). ) integral in pivoting of said drum (3), and an output constituted respectively, or by a toothing drum (13) pivotally integral with said drum (3), or by a ratchet (12) mounted pivotally integral with said bung (4) or said barrel shaft (18).
EP12758482.9A 2011-09-15 2012-09-13 Barrel with reduced core diameter Active EP2756358B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12758482.9A EP2756358B1 (en) 2011-09-15 2012-09-13 Barrel with reduced core diameter

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP11181354.9A EP2570864B1 (en) 2011-09-15 2011-09-15 Clock barrel with reduced core diameter
PCT/EP2012/067908 WO2013037867A1 (en) 2011-09-15 2012-09-13 Timepiece barrel having a small core diameter
EP12758482.9A EP2756358B1 (en) 2011-09-15 2012-09-13 Barrel with reduced core diameter

Publications (2)

Publication Number Publication Date
EP2756358A1 true EP2756358A1 (en) 2014-07-23
EP2756358B1 EP2756358B1 (en) 2016-07-27

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EP12758482.9A Active EP2756358B1 (en) 2011-09-15 2012-09-13 Barrel with reduced core diameter

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US (1) US9146535B2 (en)
EP (2) EP2570864B1 (en)
JP (1) JP5807122B2 (en)
KR (1) KR101620765B1 (en)
CN (1) CN103827756B (en)
HK (1) HK1197104A1 (en)
RU (1) RU2557673C1 (en)
WO (1) WO2013037867A1 (en)

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EP2570861A1 (en) * 2011-09-15 2013-03-20 ETA SA Manufacture Horlogère Suisse Clock barrel assembly with reduced core diameter
EP2570862B1 (en) * 2011-09-15 2014-03-05 ETA SA Manufacture Horlogère Suisse Clock barrel assembly with reduced core diameter
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EP2746865B1 (en) 2012-12-18 2016-03-02 ETA SA Manufacture Horlogère Suisse Timepiece barrel
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Also Published As

Publication number Publication date
CN103827756B (en) 2016-08-17
KR20140059862A (en) 2014-05-16
JP5807122B2 (en) 2015-11-10
US20140211595A1 (en) 2014-07-31
JP2014526689A (en) 2014-10-06
EP2570864B1 (en) 2018-11-14
CN103827756A (en) 2014-05-28
EP2756358B1 (en) 2016-07-27
HK1197104A1 (en) 2015-01-02
EP2570864A1 (en) 2013-03-20
WO2013037867A1 (en) 2013-03-21
RU2557673C1 (en) 2015-07-27
KR101620765B1 (en) 2016-05-12
US9146535B2 (en) 2015-09-29

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