EP3872576B1 - Timepiece barrel with twisted arbor - Google Patents

Timepiece barrel with twisted arbor Download PDF

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Publication number
EP3872576B1
EP3872576B1 EP20159421.5A EP20159421A EP3872576B1 EP 3872576 B1 EP3872576 B1 EP 3872576B1 EP 20159421 A EP20159421 A EP 20159421A EP 3872576 B1 EP3872576 B1 EP 3872576B1
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EP
European Patent Office
Prior art keywords
barrel
ratchet
drum
shaft
arbour
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP20159421.5A
Other languages
German (de)
French (fr)
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EP3872576A1 (en
Inventor
Julien Christan
Laurent Kaelin
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.)
ETA SA Manufacture Horlogere Suisse
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ETA SA Manufacture Horlogere Suisse
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by ETA SA Manufacture Horlogere Suisse filed Critical ETA SA Manufacture Horlogere Suisse
Priority to EP20159421.5A priority Critical patent/EP3872576B1/en
Priority to US17/166,545 priority patent/US11782386B2/en
Priority to JP2021018918A priority patent/JP7116815B2/en
Priority to CN202110210265.4A priority patent/CN113376994B/en
Publication of EP3872576A1 publication Critical patent/EP3872576A1/en
Application granted granted Critical
Publication of EP3872576B1 publication Critical patent/EP3872576B1/en
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Anticipated expiration legal-status Critical

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    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B1/00—Driving mechanisms
    • G04B1/10—Driving mechanisms with mainspring
    • G04B1/16—Barrels; Arbors; Barrel axles

Definitions

  • the invention relates to a barrel with a twisted shaft for a mechanical watch movement.
  • the invention also relates to a watch movement comprising at least one such barrel with a twisted shaft.
  • the invention also relates to a timepiece comprising such a clock movement.
  • the invention relates to the field of watchmaking, and more particularly to the field of energy storage barrels, for powering a movement, a strike, or even another functionality of a part. watchmaking.
  • a ratchet is mounted axially on one end of a barrel shaft, said end emerging from the barrel drum.
  • the outgoing end has a square section, cooperating complementary in nesting within a housing of the same section provided in the center of said ratchet, for its drive.
  • the opposite end of the barrel shaft is mounted axially free to rotate relative to a barrel drum.
  • the latter internally receives a barrel spring, in the form of an elastically shaped blade, one end of which locks against a clearance made in the interior wall of said drum, while the opposite end of said spring is fixed on the shaft , via a hook, in particular provided on an integral drain of said tree.
  • a barrel spring in the form of an elastically shaped blade, one end of which locks against a clearance made in the interior wall of said drum, while the opposite end of said spring is fixed on the shaft , via a hook, in particular provided on an integral drain of said tree.
  • the ratchet is locked on the shaft by screwing resting on a shoulder provided projecting on said shaft, beyond the square section of the outgoing end. Further forward, an axial screw is screwed into a complementary tapped hole within said outgoing end.
  • This type of mounting by screwing firstly imposes a dimensioning constraint on the diameter of the shaft, the outgoing end of which is intended to receive the screw.
  • This dimensioning impacts the space available in the drum for the spring and limits the number of windings of said spring, namely the power reserve of the timepiece.
  • the invention aims to keep a ratchet locked on a shaft of a barrel, without having to be fixed by screwing, while avoiding the risk of the ratchet springing out from the spring.
  • the barrel is remarkable in that said outgoing end of the shaft has a twisted shape around its axis.
  • the invention envisages an outgoing end of said shaft which is provided twisted or twisted, imposing a rotation in one direction of the ratchet during its introduction onto said shaft from the distal point of the outgoing end up to the locking position against the bung of said shaft, and in the opposite direction of rotation during its extraction.
  • the torque provided by the compression of the barrel spring is sufficient to prevent the ratchet from rotating relative to said shaft in said opposite direction of extraction, and consequently also prevents it from going up along of the square section of the twisted shaft.
  • the shaft can be narrower.
  • the invention makes it possible to reduce the diameter of the bung, thus making it possible to accommodate a longer spring in the barrel drum, increasing the number of turns around the bung and thus the power reserve of the barrel.
  • the shaft according to the invention also saves time, because it is no longer necessary to unscrew a screw to remove the ratchet.
  • the ratchet can be removed directly without any prior steps, apart from that concerning the ratchet.
  • the outgoing end of the shaft is twisted in the opposite direction to the torque applied to said shaft by the spring in compression.
  • the torque is exerted in a clockwise direction on the bung of the shaft, then the outgoing end of said shaft is twisted in the opposite direction, from the bung towards said distal end, and vice versa.
  • said outgoing end is of polygonal section, the opening of the ratchet having a corresponding shape.
  • said outgoing end is of square section.
  • the outgoing end has chamfered edges.
  • said outgoing end comprises a distal face angularly offset relative to its base of the barrel.
  • the offset is at least 30 degrees.
  • said barrel comprises a bung surrounding said shaft, the bung being arranged in the housing.
  • the spring is held in the housing, on the one hand on an internal peripheral face of the barrel, and on the other hand on the bung of the shaft.
  • the shaft passes through the housing and is mounted in free rotation relative to said barrel drum.
  • a pawl cooperating directly or indirectly with teeth arranged on the external peripheral face of the drum, so as to prevent it from rotating in the opposite direction to the first direction.
  • the invention also relates to a watch movement comprising such a barrel.
  • the invention also relates to a timepiece comprising such a clock movement.
  • the present invention relates to a barrel 1 with a twisted shaft 4, as shown in figures 1 and 2 .
  • the barrel 1 comprises a barrel drum 2 of cylindrical shape.
  • the drum 2 comprises an upper face 5 and a lower face 8 in the form of discs, as well as a rounded peripheral face 6.
  • the drum 2 is provided with a housing delimited by the upper 5, lower 8 and peripheral 6 faces.
  • the peripheral face 6 of the drum 2 is provided with gear teeth 7 at the junction of the upper face 5. These teeth 7 make it possible to transmit the torque of the spring to the rest of the movement, in particular to actuate the movement of the hands.
  • the barrel 1 includes a shaft 4 passing through the housing.
  • the shaft 4 extends around a main longitudinal axis around which it can rotate.
  • the shaft 4 is provided with an outgoing end 9 of said drum 2.
  • the barrel 1 comprises a spring, not shown in the figures, the spring being arranged in the housing of the barrel drum 2.
  • the spring is spiral shaped.
  • the spring is held in the housing, on the one hand at the internal peripheral face 6 of the barrel, and on the other hand at the shaft 4.
  • the spring is compressed by rotation of said shaft 4 in a first direction of rotation 12 .
  • the barrel 1 is provided with a ratchet 3 arranged on the drum 2.
  • the ratchet 3 rests on the upper face 5 of the barrel drum 2.
  • Most of the outgoing end 9 protrudes beyond the ratchet 3.
  • the ratchet 3 is a flat disc provided with peripheral gear teeth 13.
  • the ratchet 3 is configured to allow the rotation of the shaft 4 in the first direction of rotation 12.
  • the ratchet 3 comprises an opening 14 cooperating in nesting on the outgoing end 9 of the shaft 4, the outgoing end 9 passing through the ratchet 3. In a movement, the ratchet 3 is for example blocked in the other direction by a pawl, not shown in the figures.
  • the pawl does not prevent the ratchet from rotating in the first direction 12.
  • the shaft 4 turns in the first direction 12 and compresses the spiral spring inside the drum housing 3. But the ratchet 3 is blocked in the other direction so that the spring remains compressed.
  • the force exerted by the spring causes the barrel 2 to rotate to activate the mechanism of the clock movement, and not the shaft 4.
  • said outgoing end 9 of the shaft 4 has a twisted shape around its axis.
  • the outgoing end 9 is twisted in the opposite direction to said first direction 12 relative to the drum 2.
  • Said outgoing end 9 is of polygonal section, the opening 14 of the ratchet 3 having a corresponding shape.
  • Said outgoing end 9 is of square section in the figures.
  • the edges of said outgoing end 9 are chamfered.
  • Said outgoing end 9 comprises a distal face 16 angularly offset relative to its base at the height of the barrel 1. The offset is preferably at least 30 degrees, or even 45 degrees.
  • the ratchet 3 is raised along the outgoing end 9 by rotating it through an angle corresponding to that of the spin of the shaft 4. To this, the ratchet 3 rotates in the direction 15 of the twist of the outgoing end 9.
  • the position of the opening 14 always corresponds to the shape of the section of the outgoing end 9, the ratchet 3 being able to slide along the outgoing end 9.
  • FIG. 3 shows the shaft 4 provided with the outgoing end 9 and the upper face 16.
  • the shaft 4 further comprises a bung 11 surrounding said shaft, the bung 11 being arranged in the housing.
  • the spring is held at the bung 11 of the shaft 4.
  • the spring applies a force on the shaft 4 through the bung 11, the shaft 4 transmitting the force to the ratchet 3, which is blocked by the pawl.
  • the ratchet 3 does not risk sliding along the outgoing end, because the force is applied in the opposite direction 12 to the direction 15 of the twist.
  • the present invention also relates to a watch movement 10 comprising a barrel as described above.
  • FIG. 4 shows part 10 of an automatic winding movement comprising the barrel 1 according to the invention.
  • This part 10 comprises a plate 17 of the movement, an oscillating mass 18, a barrel bridge 19, a bridge 21 of the automatic winding system, gears 22 of the needle display system of the timepiece.
  • the plate 17 and the two bridges 19, 21 are substantially parallel. From bottom to top, we find the plate 17, the barrel bridge 19, the bridge 21 of the automatic winding system and the oscillating weight 18.
  • the gears 22 are arranged next to the barrel bridge 19, under the bridge 21 of the system automatic winding.
  • the barrel 1 is mounted between the plate 17 and the barrel bridge 19. To this end, the outgoing end 9 of the shaft 4 passes through the barrel bridge 19 and the ratchet 3, the ratchet 3 being arranged on the barrel bridge 19, below the bridge of the automatic winding system 21.
  • the other free end 23 of the shaft is assembled to the plate 17 while being free to rotate around its axis relative to the latter.
  • the 20 movement is similar, but does not have an automatic winding system.
  • the ratchet 3 is engaged with a crown wheel 25, which can be operated from the outer crown of the timepiece, the crown not being shown in the figures.
  • the crown wheel 25 meshes with the ratchet 3, which rotates the shaft of the barrel 4 to force the spring inside the drum 2, and raise the spring.
  • the ratchet locking pawl 26 is arranged on the crown wheel 25 instead of the ratchet 3 directly. The pawl 26 makes it possible to rotate the crown wheel 25 in only one direction, the direction allowing the spring to be raised.
  • the invention also relates to a timepiece, not shown in the figures, comprising such a clockwork movement.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
  • Transmission Devices (AREA)
  • Measurement Of Unknown Time Intervals (AREA)

Description

Domaine de l'inventionField of the invention

L'invention concerne un barillet à arbre vrillé pour un mouvement mécanique d'horlogerie.The invention relates to a barrel with a twisted shaft for a mechanical watch movement.

L'invention concerne aussi un mouvement d'horlogerie comportant au moins un tel barillet à arbre vrillé.The invention also relates to a watch movement comprising at least one such barrel with a twisted shaft.

L'invention concerne encore une pièce d'horlogerie comprenant un tel mouvement d'horlogerie.The invention also relates to a timepiece comprising such a clock movement.

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 encore d'une autre fonctionnalité d'une pièce d'horlogerie.The invention relates to the field of watchmaking, and more particularly to the field of energy storage barrels, for powering a movement, a strike, or even another functionality of a part. watchmaking.

Arrière-plan de l'inventionBackground of the invention

Dans l'architecture classique des barillets, un rochet est monté de façon axiale sur une extrémité d'un arbre de barillet, ladite extrémité étant sortante du tambour de barillet. L'extrémité sortante présente une section carrée, coopérant complémentairement en emboîtement au sein d'un logement de même section ménagé au centre dudit rochet, en vue de son entraînement.In the classic architecture of barrels, a ratchet is mounted axially on one end of a barrel shaft, said end emerging from the barrel drum. The outgoing end has a square section, cooperating complementary in nesting within a housing of the same section provided in the center of said ratchet, for its drive.

A ce titre, l'extrémité opposée de l'arbre de barillet est montée de façon axiale libre en rotation par rapport à un tambour de barillet. Ce dernier reçoit intérieurement un ressort de barillet, sous forme d'une lame conformée élastiquement, dont une extrémité vient en blocage contre un dégagement ménagé dans la paroi intérieure dudit tambour, tandis que l'extrémité opposée dudit ressort vient en fixation sur l'arbre, par l'intermédiaire d'un crochet, notamment ménagé sur une bonde solidaire dudit arbre. Ainsi, en comprimant le ressort au sein du tambour, son élasticité confère un mouvement en rotation audit arbre rapport à la boîte du tambour, ce qui entraîne le rochet extérieurement audit tambour de barillet.As such, the opposite end of the barrel shaft is mounted axially free to rotate relative to a barrel drum. The latter internally receives a barrel spring, in the form of an elastically shaped blade, one end of which locks against a clearance made in the interior wall of said drum, while the opposite end of said spring is fixed on the shaft , via a hook, in particular provided on an integral drain of said tree. Thus, by compressing the spring within the drum, its elasticity gives rotational movement to said shaft in relation to the drum box, which drives the ratchet externally to said barrel drum.

On notera que le rochet est verrouillé sur l'arbre par vissage en appui sur un épaulement ménagé en saillie sur ledit arbre, au-delà de la section carrée de l'extrémité sortante. Plus avant, une vis axiale est vissée dans un trou taraudé complémentairement au sein de ladite extrémité sortante.Note that the ratchet is locked on the shaft by screwing resting on a shoulder provided projecting on said shaft, beyond the square section of the outgoing end. Further forward, an axial screw is screwed into a complementary tapped hole within said outgoing end.

Dans ce contexte, lors d'un entretien du mouvement d'une pièce d'horlogerie nécessitant une intervention sur le barillet, comme par exemple un lavage ou un changement, il est nécessaire de démonter le barillet. Pour ce faire, on doit enlever un bâti pour accéder au rochet, puis retirer le rochet afin d'accéder au barillet. Cette opération de démontage s'effectue alors que le ressort du barillet est encore sous tension, le rochet étant quant à lui bloqué par un cliquet. Dans un premier temps, on libère la rotation du rochet en escamotant le cliquet, permettant de détendre le ressort. Une fois le ressort entièrement détendu, on procède au dévissage de ladite vis depuis l'arbre, pour extraire le rochet et ainsi accéder au barillet.In this context, when maintaining the movement of a timepiece requiring intervention on the barrel, such as washing or changing, it is necessary to dismantle the barrel. To do this, you must remove a frame to access the ratchet, then remove the ratchet to access the barrel. This disassembly operation is carried out while the barrel spring is still under tension, the ratchet being blocked by a pawl. First, we release the rotation of the ratchet by retracting the pawl, allowing the spring to relax. Once the spring is completely relaxed, we proceed to unscrew said screw from the shaft, to extract the ratchet and thus access the barrel.

Ce type de montage par vissage impose tout d'abord une contrainte de dimensionnement du diamètre de l'arbre, dont l'extrémité sortante est destinée à recevoir la vis. Ce dimensionnement impacte la place disponible dans le tambour pour le ressort et limite le nombre d'enroulements dudit ressort, à savoir la réserve de marche de la pièce d'horlogerie.This type of mounting by screwing firstly imposes a dimensioning constraint on the diameter of the shaft, the outgoing end of which is intended to receive the screw. This dimensioning impacts the space available in the drum for the spring and limits the number of windings of said spring, namely the power reserve of the timepiece.

Des exemples de barillets munis d'un rochet sont décrits dans les documents de l'état de l'art EP2196866 et CH713951 . Un autre document EP2657794 décrit un procédé de fabrication d'un arbre de barillet.Examples of barrels fitted with a ratchet are described in state-of-the-art documents EP2196866 And CH713951 . Another document EP2657794 describes a method of manufacturing a barrel shaft.

Par ailleurs, dans un but de réduction du nombre de composants et des opérations de montage et de démontage, il est envisagé de s'affranchir du maintien par vissage du rochet, en supprimant la vis et le taraudage de l'arbre, permettant notamment de diminuer le diamètre de ce dernier. Une telle suppression permet de rendre plus compacte la pièce d'horlogerie, tout en augmentant sa réserve de marche.Furthermore, with the aim of reducing the number of components and assembly and disassembly operations, it is envisaged to do away with holding the ratchet by screwing, by eliminating the screw and the tapping of the shaft, making it possible in particular to reduce the diameter of the latter. A such removal makes it possible to make the timepiece more compact, while increasing its power reserve.

Toutefois, en supprimant la vis qui assure le maintien du rochet, lorsqu'il est soumis au couple du ressort comprimé au sein du barillet, le rochet est susceptible de sauter lors de l'enlèvement du bâti, qui est désormais le seul composant à le maintenir sur l'extrémité sortante de l'arbre. L'expulsion subite du rochet risque de surprendre, voire blesser l'horloger, ainsi que d'endommager ledit rochet ou d'autres composants, voire de le perdre.However, by removing the screw which secures the ratchet, when it is subjected to the torque of the spring compressed within the barrel, the ratchet is likely to jump when removing the frame, which is now the only component to do so. hold on the outgoing end of the shaft. The sudden expulsion of the ratchet risks surprising or even injuring the watchmaker, as well as damaging said ratchet or other components, or even losing it.

Résumé de l'inventionSummary of the invention

L'invention vise à maintenir en verrouillage un rochet sur un arbre d'un barillet, en s'affranchissant d'une fixation par vissage, tout en évitant le risque de jaillissement du rochet par le ressort.The invention aims to keep a ratchet locked on a shaft of a barrel, without having to be fixed by screwing, while avoiding the risk of the ratchet springing out from the spring.

A cet effet, l'invention concerne un barillet à arbre vrillé, comprenant au moins :

  • un tambour de barillet muni d'un logement,
  • un ressort agencé dans le logement du tambour de barillet,
  • un arbre traversant au moins en partie le logement, ledit ressort étant mis en compression par rotation dudit arbre selon un premier sens de rotation, l'arbre étant muni d'une extrémité sortante dudit tambour,
  • un rochet agencé sur le tambour, le rochet étant configuré pour permettre la rotation de l'arbre dans le premier sens de rotation, l'extrémité sortante traversant le rochet par une ouverture coopérant en emboîtement sur l'extrémité sortante.
For this purpose, the invention relates to a barrel with a twisted shaft, comprising at least:
  • a barrel drum provided with a housing,
  • a spring arranged in the housing of the barrel drum,
  • a shaft passing at least partly through the housing, said spring being put into compression by rotation of said shaft in a first direction of rotation, the shaft being provided with an end emerging from said drum,
  • a ratchet arranged on the drum, the ratchet being configured to allow rotation of the shaft in the first direction of rotation, the outgoing end passing through the ratchet through an opening cooperating in nesting on the outgoing end.

Le barillet est remarquable en ce que ladite extrémité sortante de l'arbre a une forme vrillée autour de son axe.The barrel is remarkable in that said outgoing end of the shaft has a twisted shape around its axis.

Ainsi, l'invention envisage une extrémité sortante dudit arbre qui est prévue vrillée ou torsadée, imposant une rotation selon un sens du rochet lors de son introduction sur ledit arbre depuis le point distal de l'extrémité sortante jusqu'en position de verrouillage contre la bonde dudit arbre, et en sens inverse de rotation lors de son extraction.Thus, the invention envisages an outgoing end of said shaft which is provided twisted or twisted, imposing a rotation in one direction of the ratchet during its introduction onto said shaft from the distal point of the outgoing end up to the locking position against the bung of said shaft, and in the opposite direction of rotation during its extraction.

Dès lors, tant que le barillet est chargé, le couple fourni par la compression du ressort de barillet suffit à empêcher le rochet de tourner par rapport audit arbre dans ledit sens inverse d'extraction, et par conséquent l'empêche également de remonter le long de la section carrée de l'arbre vrillé.Therefore, as long as the barrel is loaded, the torque provided by the compression of the barrel spring is sufficient to prevent the ratchet from rotating relative to said shaft in said opposite direction of extraction, and consequently also prevents it from going up along of the square section of the twisted shaft.

En outre, comme on n'utilise pas de vis, l'arbre peut être plus étroit. L'invention permet de diminuer le diamètre de la bonde, permettant ainsi de loger un ressort plus long dans le tambour de barillet, augmentant le nombre de spires autour de la bonde et ainsi la réserve de marche du barillet.Additionally, since no screws are used, the shaft can be narrower. The invention makes it possible to reduce the diameter of the bung, thus making it possible to accommodate a longer spring in the barrel drum, increasing the number of turns around the bung and thus the power reserve of the barrel.

L'arbre selon l'invention permet de plus de gagner du temps, car il n'est plus nécessaire de dévisser une vis pour enlever le rochet. On peut enlever le rochet directement sans étape préalable, hormis celle concernant le cliquet.The shaft according to the invention also saves time, because it is no longer necessary to unscrew a screw to remove the ratchet. The ratchet can be removed directly without any prior steps, apart from that concerning the ratchet.

Plus avant, l'extrémité sortante de l'arbre est vrillée en sens inverse du couple appliqué audit arbre par le ressort en compression. En d'autres termes, si le couple s'exerce selon le sens horaire sur la bonde de l'arbre, alors l'extrémité sortante dudit arbre est vrillée en sens inverse, depuis la bonde vers ladite extrémité distale, et inversement.Further forward, the outgoing end of the shaft is twisted in the opposite direction to the torque applied to said shaft by the spring in compression. In other words, if the torque is exerted in a clockwise direction on the bung of the shaft, then the outgoing end of said shaft is twisted in the opposite direction, from the bung towards said distal end, and vice versa.

Selon une forme de réalisation avantageuse, ladite extrémité sortante est de section polygonale, l'ouverture du rochet ayant une forme correspondante.According to an advantageous embodiment, said outgoing end is of polygonal section, the opening of the ratchet having a corresponding shape.

Selon une forme de réalisation avantageuse, ladite extrémité sortante est de section carrée.According to an advantageous embodiment, said outgoing end is of square section.

Selon une forme de réalisation avantageuse, l'extrémité sortante comporte des arêtes chanfreinées.According to an advantageous embodiment, the outgoing end has chamfered edges.

Selon une forme de réalisation avantageuse, ladite extrémité sortante comprend une face distale angulairement décalée par rapport à sa base au barillet.According to an advantageous embodiment, said outgoing end comprises a distal face angularly offset relative to its base of the barrel.

Selon une forme de réalisation avantageuse, le décalage est d'au moins 30 degrés.According to an advantageous embodiment, the offset is at least 30 degrees.

Selon une forme de réalisation avantageuse, ledit barillet comprend une bonde entourant ledit arbre, la bonde étant agencée dans le logement.According to an advantageous embodiment, said barrel comprises a bung surrounding said shaft, the bung being arranged in the housing.

Selon une forme de réalisation avantageuse, le ressort est maintenu dans le logement, d'une part à une face périphérique interne du barillet, et d'autre part à la bonde de l'arbre.According to an advantageous embodiment, the spring is held in the housing, on the one hand on an internal peripheral face of the barrel, and on the other hand on the bung of the shaft.

Selon une forme de réalisation avantageuse, l'arbre traverse le logement et est monté en rotation libre par rapport audit tambour de barillet.According to an advantageous embodiment, the shaft passes through the housing and is mounted in free rotation relative to said barrel drum.

Selon une forme de réalisation avantageuse, il est prévu un cliquet coopérant directement ou indirectement avec des dents agencées sur la face périphérique externe du tambour, de manière à l'empêcher de tourner dans le sens inverse du premier sens.According to an advantageous embodiment, there is provided a pawl cooperating directly or indirectly with teeth arranged on the external peripheral face of the drum, so as to prevent it from rotating in the opposite direction to the first direction.

L'invention concerne aussi un mouvement d'horlogerie comprenant un tel barillet.The invention also relates to a watch movement comprising such a barrel.

L'invention concerne encore une pièce d'horlogerie comprenant un tel mouvement d'horlogerie.The invention also relates to a timepiece comprising such a clock movement.

Brève description des figuresBrief description of the figures

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

  • la figure 1 représente schématiquement une vue en perspective d'un barillet selon un mode de réalisation de l'invention, le rochet étant dans une première position ;
  • la figure 2 représente schématiquement une vue en perspective d'un barillet selon un mode de réalisation de l'invention, le rochet étant dans une seconde position ; et
  • la figure 3 représente schématiquement une vue en perspective d'un arbre d'un barillet selon un mode de réalisation de l'invention ;
  • la figure 4 représente schématiquement une vue en coupe d'une partie d'un mouvement d'horlogerie à remontage automatique munie d'un barillet selon l'invention ;
  • la figure 5 représente schématiquement une vue en perspective d'une partie d'un mouvement d'horlogerie à remontage manuel munie d'un barillet selon l'invention.
The invention will be described below in more detail using the appended drawings, given by way of non-limiting examples, in which:
  • there figure 1 schematically represents a perspective view of a barrel according to one embodiment of the invention, the ratchet being in a first position;
  • there figure 2 schematically represents a perspective view of a barrel according to one embodiment of the invention, the ratchet being in a second position; And
  • there Figure 3 schematically represents a perspective view of a shaft of a barrel according to one embodiment of the invention;
  • there Figure 4 schematically represents a sectional view of a part of an automatic winding watch movement provided with a barrel according to the invention;
  • there Figure 5 schematically represents a perspective view of a part of a manually wound watch movement provided with a barrel according to the invention.

Description détaillée de l'inventionDetailed description of the invention

La présente invention se rapporte à un barillet 1 à arbre vrillé 4, tel que représenté aux figures 1 et 2.The present invention relates to a barrel 1 with a twisted shaft 4, as shown in figures 1 and 2 .

Le barillet 1 comprend un tambour 2 de barillet de forme cylindrique. Le tambour 2 comprend une face supérieure 5 et une face inférieure 8 en forme de disques, ainsi qu'une face périphérique 6 arrondie. Le tambour 2 est muni d'un logement délimité par les faces supérieure 5, inférieure 8 et périphérique 6.The barrel 1 comprises a barrel drum 2 of cylindrical shape. The drum 2 comprises an upper face 5 and a lower face 8 in the form of discs, as well as a rounded peripheral face 6. The drum 2 is provided with a housing delimited by the upper 5, lower 8 and peripheral 6 faces.

La face périphérique 6 du tambour 2 est dotée de dents 7 d'engrenage à la jonction de la face supérieure 5. Ces dents 7 permettent de transmettre le couple du ressort au reste du mouvement, en particulier pour actionner le mouvement des aiguilles.The peripheral face 6 of the drum 2 is provided with gear teeth 7 at the junction of the upper face 5. These teeth 7 make it possible to transmit the torque of the spring to the rest of the movement, in particular to actuate the movement of the hands.

Le barillet 1 comporte un arbre 4 traversant le logement. L'arbre 4 s'étend autour d'un axe longitudinal principal autour duquel il peut tourner. L'arbre 4 est muni d'une extrémité sortante 9 dudit tambour 2.The barrel 1 includes a shaft 4 passing through the housing. The shaft 4 extends around a main longitudinal axis around which it can rotate. The shaft 4 is provided with an outgoing end 9 of said drum 2.

Le barillet 1 comprend un ressort, non représenté sur les figures, le ressort étant agencé dans le logement du tambour 2 de barillet. Le ressort est en forme de spirale. Le ressort est maintenu dans le logement, d'une part à la face périphérique 6 interne du barillet, et d'autre part à l'arbre 4. Le ressort est mis en compression par rotation dudit arbre 4 selon un premier sens de rotation 12.The barrel 1 comprises a spring, not shown in the figures, the spring being arranged in the housing of the barrel drum 2. The spring is spiral shaped. The spring is held in the housing, on the one hand at the internal peripheral face 6 of the barrel, and on the other hand at the shaft 4. The spring is compressed by rotation of said shaft 4 in a first direction of rotation 12 .

Le barillet 1 est muni d'un rochet 3 agencé sur le tambour 2. En position de fonctionnement, telle que représenté sur la figure 2, le rochet 3 repose sur la face supérieure 5 du tambour 2 de barillet. La majeure partie de l'extrémité sortante 9 dépasse au-delà du rochet 3. Le rochet 3 est un disque plat muni de dents 13 d'engrenage périphériques. Le rochet 3 est configuré pour permettre la rotation de l'arbre 4 dans le premier sens de rotation 12. Le rochet 3 comprend une ouverture 14 coopérant en emboîtement sur l'extrémité sortante 9 de l'arbre 4, l'extrémité sortante 9 traversant le rochet 3. Dans un mouvement, le rochet 3 est par exemple bloqué dans l'autre sens par un cliquet, non représenté sur les figures. Le cliquet n'empêche pas le rochet de tourner dans le premier sens 12. Ainsi, lorsqu'on fait tourner le rochet 3, l'arbre 4 tourne dans le premier sens 12 et comprime le ressort spiral à l'intérieur du logement du tambour 3. Mais le rochet 3 est bloqué dans l'autre sens pour que le ressort reste comprimé. Ainsi, l'effort exercé par le ressort fait tourner le barillet 2 pour actionner le mécanisme du mouvement d'horlogerie, et non l'arbre 4.The barrel 1 is provided with a ratchet 3 arranged on the drum 2. In the operating position, as shown on the figure 2 , the ratchet 3 rests on the upper face 5 of the barrel drum 2. Most of the outgoing end 9 protrudes beyond the ratchet 3. The ratchet 3 is a flat disc provided with peripheral gear teeth 13. The ratchet 3 is configured to allow the rotation of the shaft 4 in the first direction of rotation 12. The ratchet 3 comprises an opening 14 cooperating in nesting on the outgoing end 9 of the shaft 4, the outgoing end 9 passing through the ratchet 3. In a movement, the ratchet 3 is for example blocked in the other direction by a pawl, not shown in the figures. The pawl does not prevent the ratchet from rotating in the first direction 12. Thus, when the ratchet 3 is rotated, the shaft 4 turns in the first direction 12 and compresses the spiral spring inside the drum housing 3. But the ratchet 3 is blocked in the other direction so that the spring remains compressed. Thus, the force exerted by the spring causes the barrel 2 to rotate to activate the mechanism of the clock movement, and not the shaft 4.

Selon l'invention, ladite extrémité sortante 9 de l'arbre 4 a une forme vrillée autour de son axe. L'extrémité sortante 9 est vrillée en sens inverse dudit premier sens 12 par rapport au tambour 2. Ladite extrémité sortante 9 est de section polygonale, l'ouverture 14 du rochet 3 ayant une forme correspondante. Ladite extrémité sortante 9 est de section carrée sur les figures. De préférence, les arêtes de ladite extrémité sortante 9 sont chanfreinées. Ladite extrémité sortante 9 comprend une face distale 16 angulairement décalée par rapport à sa base à hauteur du barillet 1. Le décalage est de préférence d'au moins 30 degrés, voire 45 degrés.According to the invention, said outgoing end 9 of the shaft 4 has a twisted shape around its axis. The outgoing end 9 is twisted in the opposite direction to said first direction 12 relative to the drum 2. Said outgoing end 9 is of polygonal section, the opening 14 of the ratchet 3 having a corresponding shape. Said outgoing end 9 is of square section in the figures. Preferably, the edges of said outgoing end 9 are chamfered. Said outgoing end 9 comprises a distal face 16 angularly offset relative to its base at the height of the barrel 1. The offset is preferably at least 30 degrees, or even 45 degrees.

Pour retirer le rochet 3, par exemple lors de l'entretien du mouvement, le rochet 3 est remonté le long de l'extrémité sortante 9 en le faisant tourner d'un angle correspondant à celui de la vrille de l'arbre 4. Pour cela, le rochet 3 effectue une rotation dans le sens 15 de la vrille de l'extrémité sortante 9. Ainsi, la position de l'ouverture 14 correspond toujours à la forme de la section de l'extrémité sortante 9, le rochet 3 pouvant glisser le long de l'extrémité sortante 9.To remove the ratchet 3, for example during maintenance of the movement, the ratchet 3 is raised along the outgoing end 9 by rotating it through an angle corresponding to that of the spin of the shaft 4. To this, the ratchet 3 rotates in the direction 15 of the twist of the outgoing end 9. Thus, the position of the opening 14 always corresponds to the shape of the section of the outgoing end 9, the ratchet 3 being able to slide along the outgoing end 9.

La figure 3 montre l'arbre 4 muni de l'extrémité sortante 9 et de la face supérieure 16. L'arbre 4 comprend en outre une bonde 11 entourant ledit arbre, la bonde 11 étant agencée dans le logement. Le ressort est maintenu à la bonde 11 de l'arbre 4.There Figure 3 shows the shaft 4 provided with the outgoing end 9 and the upper face 16. The shaft 4 further comprises a bung 11 surrounding said shaft, the bung 11 being arranged in the housing. The spring is held at the bung 11 of the shaft 4.

Ainsi, dans le barillet 1, le ressort applique une force sur l'arbre 4 à travers la bonde 11, l'arbre 4 transmettant la force au rochet 3, qui est bloqué par le cliquet. Ainsi, le rochet 3 ne risque pas de glisser le long de l'extrémité sortante, car la force est appliquée dans le sens inverse 12 du sens 15 de la vrille.Thus, in the barrel 1, the spring applies a force on the shaft 4 through the bung 11, the shaft 4 transmitting the force to the ratchet 3, which is blocked by the pawl. Thus, the ratchet 3 does not risk sliding along the outgoing end, because the force is applied in the opposite direction 12 to the direction 15 of the twist.

La présente invention se rapporte également à un mouvement horloger 10 comprenant un barillet tel que décrit précédemment.The present invention also relates to a watch movement 10 comprising a barrel as described above.

La figure 4 montre une partie 10 d'un mouvement à remontage automatique comprenant le barillet 1 selon l'invention. Cette partie 10 comprend une platine 17 du mouvement, une masse oscillante 18, un pont 19 de barillet, un pont 21 du système de remontage automatique, des engrenages 22 du système d'affichage à aiguilles de la pièce d'horlogerie. La platine 17 et les deux ponts 19, 21 sont sensiblement parallèles. De bas en haut, on trouve la platine 17, le pont de barillet 19, le pont 21 du système de remontage automatique et la masse oscillante 18. Les engrenages 22 sont disposés à côté du pont de barillet 19, sous le pont 21 du système de remontage automatique.There Figure 4 shows part 10 of an automatic winding movement comprising the barrel 1 according to the invention. This part 10 comprises a plate 17 of the movement, an oscillating mass 18, a barrel bridge 19, a bridge 21 of the automatic winding system, gears 22 of the needle display system of the timepiece. The plate 17 and the two bridges 19, 21 are substantially parallel. From bottom to top, we find the plate 17, the barrel bridge 19, the bridge 21 of the automatic winding system and the oscillating weight 18. The gears 22 are arranged next to the barrel bridge 19, under the bridge 21 of the system automatic winding.

Le barillet 1 est monté entre la platine 17 et le pont de barillet 19. A cette fin, l'extrémité sortante 9 de l'arbre 4 passe à travers le pont de barillet 19 et le rochet 3, le rochet 3 étant agencé sur le pont de barillet 19, en dessous du pont du système de remontage automatique 21. L'autre extrémité libre 23 de l'arbre est assemblée à la platine 17 tout en étant libre en rotation autour de son axe par rapport à celle-ci.The barrel 1 is mounted between the plate 17 and the barrel bridge 19. To this end, the outgoing end 9 of the shaft 4 passes through the barrel bridge 19 and the ratchet 3, the ratchet 3 being arranged on the barrel bridge 19, below the bridge of the automatic winding system 21. The other free end 23 of the shaft is assembled to the plate 17 while being free to rotate around its axis relative to the latter.

Dans le mouvement à remontage manuel de la figure 5, le mouvement 20 est semblable, mais n'a pas de système de remontage automatique. Le rochet 3 est en prise avec une roue de couronne 25, qui peut être actionnée à partir de la couronne externe de la pièce d'horlogerie, la couronne n'étant pas représentée sur les figures. Ainsi, en actionnant la couronne, la roue de couronne 25 engrène le rochet 3, qui fait tourner l'arbre du barillet 4 pour contraindre le ressort à l'intérieur du tambour 2, et remonter le ressort. Dans ce mode de réalisation, le cliquet de blocage 26 du rochet est agencé sur la roue de couronne 25 au lieu du rochet 3 directement. Le cliquet 26 permet de faire tourner la roue de couronne 25 dans un seul sens, le sens permettant de remonter le ressort.In the hand-wound movement of the Figure 5 , the 20 movement is similar, but does not have an automatic winding system. The ratchet 3 is engaged with a crown wheel 25, which can be operated from the outer crown of the timepiece, the crown not being shown in the figures. Thus, by operating the crown, the crown wheel 25 meshes with the ratchet 3, which rotates the shaft of the barrel 4 to force the spring inside the drum 2, and raise the spring. In this embodiment, the ratchet locking pawl 26 is arranged on the crown wheel 25 instead of the ratchet 3 directly. The pawl 26 makes it possible to rotate the crown wheel 25 in only one direction, the direction allowing the spring to be raised.

L'invention concerne encore une pièce d'horlogerie, non représentée sur les figures, comprenant un tel mouvement d'horlogerie.The invention also relates to a timepiece, not shown in the figures, comprising such a clockwork movement.

Claims (13)

  1. A twisted arbour barrel (1), comprising at least
    - a barrel drum (2) provided with a housing,
    - a spring arranged in the housing of the barrel drum (2),
    - an arbour (4) at least partially passing through the housing, said spring being compressed by rotation of said arbour in a first direction of rotation (12), the arbour (4) being provided with a protruding end (9) of said drum (2),
    - a ratchet (3) arranged on the drum (2), the ratchet (3) being configured to allow the rotation of the arbour (4) in the first direction of rotation (12), the protruding end (9) passing through the ratchet (3) through an opening (14) cooperating by interlocking with the protruding end (9),
    characterised in that said protruding end (9) of the arbour (4) has a shape twisted around its axis.
  2. The barrel according to claim 1, characterised in that the protruding end (9) is twisted in the direction (15) opposite to said first direction (12) relative to the drum (2).
  3. The barrel according to any one of claims 1 or 2, characterised in that said protruding end (9) is of polygonal section, the opening (14) of the ratchet (3) having a corresponding shape.
  4. The barrel according to claim 3, characterised in that said protruding end (9) is of square section.
  5. The barrel according to any one of the preceding claims, characterised in that said protruding end (9) includes chamfered edges.
  6. The barrel according to any one of the preceding claims, characterised in that said protruding end (9) comprises a distal face (16) angularly offset relative to its base on the barrel (2).
  7. The barrel according to claim 6, characterised in that the offset is at least 30 degrees.
  8. The barrel according to any one of the preceding claims and comprising a core (11) surrounding said arbour (4), the core (11) being arranged in the housing.
  9. The barrel according to the preceding claim wherein the spring is held in the housing, on the one hand, at an internal peripheral face (6) of the barrel, and on the other hand, at the core (11) of the arbour (4).
  10. The barrel according to any one of the preceding claims, wherein the arbour (4) passes through the housing and is mounted rotationally free relative to said barrel drum (2).
  11. Assembly including a barrel according to any one of the preceding claims and a pawl (26) cooperating directly or indirectly with peripheral gear teeth (13) of the ratchet (3), so as to prevent it from rotating in the direction (15) opposite to the first direction (12).
  12. A horological movement (10, 20) comprising a barrel (1) according to any one of the preceding claims.
  13. A timepiece comprising a horological movement (10, 20) according to the preceding claim.
EP20159421.5A 2020-02-25 2020-02-25 Timepiece barrel with twisted arbor Active EP3872576B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP20159421.5A EP3872576B1 (en) 2020-02-25 2020-02-25 Timepiece barrel with twisted arbor
US17/166,545 US11782386B2 (en) 2020-02-25 2021-02-03 Timepiece barrel with a twisted arbour
JP2021018918A JP7116815B2 (en) 2020-02-25 2021-02-09 Clock barrel with twisted arbor
CN202110210265.4A CN113376994B (en) 2020-02-25 2021-02-25 Timepiece barrel with a torsion bar

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20159421.5A EP3872576B1 (en) 2020-02-25 2020-02-25 Timepiece barrel with twisted arbor

Publications (2)

Publication Number Publication Date
EP3872576A1 EP3872576A1 (en) 2021-09-01
EP3872576B1 true EP3872576B1 (en) 2024-02-21

Family

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Application Number Title Priority Date Filing Date
EP20159421.5A Active EP3872576B1 (en) 2020-02-25 2020-02-25 Timepiece barrel with twisted arbor

Country Status (4)

Country Link
US (1) US11782386B2 (en)
EP (1) EP3872576B1 (en)
JP (1) JP7116815B2 (en)
CN (1) CN113376994B (en)

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59595Y2 (en) * 1976-02-27 1984-01-09 東芝医療用品株式会社 UV indicator
JP2005156344A (en) 2003-11-26 2005-06-16 Seiko Epson Corp Spring device, and clock having the same
JP2008196549A (en) * 2007-02-09 2008-08-28 Toyoda Gosei Co Ltd Mounting structure
CH700058B1 (en) * 2008-12-15 2013-09-13 Francois Durafourg Assembly including a winding ratchet attached to a barrel arbor and barrel shaft for this set.
KR101432480B1 (en) * 2011-04-15 2014-08-21 (주)백산오피씨 Driving assembly for photosensitive drum, Photosensitive drum assembly, Process cartridge, and Image forming apparatus
EP2570862B1 (en) * 2011-09-15 2014-03-05 ETA SA Manufacture Horlogère Suisse Clock barrel assembly with reduced core diameter
EP2657794B1 (en) * 2012-04-25 2017-02-01 ETA SA Manufacture Horlogère Suisse Barrel spring and arbour
EP2746868B1 (en) * 2012-12-18 2016-04-27 ETA SA Manufacture Horlogère Suisse Clock barrel
JP6874341B2 (en) * 2016-11-22 2021-05-19 セイコーエプソン株式会社 How to operate the drive mechanism for watches, mechanical watches and royal fern
CH713951B1 (en) * 2017-07-03 2021-03-31 Eta Sa Mft Horlogere Suisse Watch barrel with reduced bung diameter.
JP6653731B2 (en) * 2018-06-13 2020-02-26 セイコーインスツル株式会社 Barrel assembly, movement and clock

Also Published As

Publication number Publication date
US20210263471A1 (en) 2021-08-26
CN113376994B (en) 2022-12-09
CN113376994A (en) 2021-09-10
EP3872576A1 (en) 2021-09-01
US11782386B2 (en) 2023-10-10
JP2021135291A (en) 2021-09-13
JP7116815B2 (en) 2022-08-10

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