EP2977827B1 - Clock barrel with improved force transmission - Google Patents
Clock barrel with improved force transmission Download PDFInfo
- Publication number
- EP2977827B1 EP2977827B1 EP14177987.6A EP14177987A EP2977827B1 EP 2977827 B1 EP2977827 B1 EP 2977827B1 EP 14177987 A EP14177987 A EP 14177987A EP 2977827 B1 EP2977827 B1 EP 2977827B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- barrel
- resilient sliding
- bridle
- sliding bridle
- inner track
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000004804 winding Methods 0.000 claims description 15
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- 230000002093 peripheral effect Effects 0.000 claims description 4
- 238000005304 joining Methods 0.000 claims description 3
- 241001417494 Sciaenidae Species 0.000 description 7
- 230000035807 sensation Effects 0.000 description 3
- 230000035882 stress Effects 0.000 description 3
- GZPBVLUEICLBOA-UHFFFAOYSA-N 4-(dimethylamino)-3,5-dimethylphenol Chemical compound CN(C)C1=C(C)C=C(O)C=C1C GZPBVLUEICLBOA-UHFFFAOYSA-N 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 2
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- 238000004513 sizing Methods 0.000 description 2
- 244000141359 Malus pumila Species 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 235000021016 apples Nutrition 0.000 description 1
- 230000003416 augmentation Effects 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 229940082150 encore Drugs 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
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- 230000002618 waking effect Effects 0.000 description 1
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Images
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
- G04B1/16—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
- G04B1/105—Driving mechanisms with mainspring having a form other than a helix
-
- G—PHYSICS
- G04—HOROLOGY
- G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
- G04B1/00—Driving mechanisms
- G04B1/10—Driving mechanisms with mainspring
- G04B1/18—Constructions for connecting the ends of the mainsprings with the barrel or the arbor
-
- G—PHYSICS
- G04—HOROLOGY
- G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
- G04B1/00—Driving mechanisms
- G04B1/10—Driving mechanisms with mainspring
- G04B1/18—Constructions for connecting the ends of the mainsprings with the barrel or the arbor
- G04B1/185—Friction clutch between spring and spring cylinder
Definitions
- the invention relates to a watch cylinder, comprising at least one spring cooperating at its inner end with a bung pivoting about a pivot axis, and at its outer end with an inner track of a drum barrel by a flange.
- slidable elastic wherein said inner track and said slidable elastic flange are each non-circular in shape, and nested one inside the other in the free state of said slidable elastic flange, and are arranged so that at least a protrusion protruding radially outwardly that comprises said sliding elastic flange cooperates in abutment with at least one radially inward projecting threshold that includes said inner race when the torque applied to said sliding elastic flange is less than a torque limit value.
- the invention also relates to a watch movement comprising such a barrel, whose bung is arranged to cooperate with manual winding means.
- the invention relates to a timepiece comprising such a movement, and / or at least one mechanism comprising such a cylinder.
- the invention relates to the field of time barrels for energy storage comprising a spring.
- the invention relates to the transmission of energy by a mainspring to a barrel drum via an element traditionally called a flange.
- the barrel springs are connected to the drum via a fixed flange.
- the transfer of force is via a slidable flange that temporarily disconnects the end of the spring of the drum above a limit declutching torque.
- the fixed flange makes it possible to maximize the properties of the spring, in particular the number of turns, but has the disadvantage of generating an overtorque during the maximum arming: the user does not feel that the spring is totally reassembled only when the torque becomes significantly most important.
- This overtorque can be the cause of problems of fatigue (rupture) but also of chronometric problems.
- the slippery flange is essential for automatic movements, however it is difficult for the user who manually goes back his movement to know, in the absence of indication of power reserve, when the barrel is fully reassembled.
- the presence of a sliding flange generates a variation of the torque when the barrel is armed at the maximum between the upper slip moment (MGM) and the lower slip moment (MGI).
- MGM upper slip moment
- MMI lower slip moment
- this system does not allow to control the torque from which the declutching is done.
- these components, and in particular the barrel drum are often subject to wear during aging tests.
- the invention proposes a new force transmission system between the flange and the barrel drum. It consists of a specific form of the barrel drum (non-cylindrical shape) and a so-called flexible flange, whose shape is adapted to that of the mainspring. Indeed, this flange must be able to transmit the force of the mainspring to the drum, and, according to the invention, has the possibility of deforming so that, when a given torque is reached, the flange can disengage from the drum and thus disarm the barrel spring slightly without rotating the drum.
- the invention relates to a watch cylinder according to claim 1.
- the invention also relates to a watch movement comprising such a barrel, whose bung is arranged to cooperate with manual winding means.
- the invention relates to a timepiece comprising such a movement, and / or at least one mechanism comprising such a cylinder.
- the inner track 6 and the slidable elastic flange 8 are each non-circular in shape, and they are nested one inside the other in the free state of the slidable elastic flange 8.
- the slidable elastic flange 8 comprises at least one protrusion 12 protruding radially outwards.
- the inner track 6 has at least one threshold 11 protruding radially inwards towards the pivot axis D.
- the inner track 6 and the elastic sliding flange 8 are arranged in such a way that at least one such protrusion 12 cooperates in abutment with at least one such threshold 11, when the torque applied to the slidable elastic flange 8 is less than a given value. torque limit.
- At least one such protrusion 12 is subjected to radial shrinkage, due to the elasticity of the slidable elastic strap 8, when the torque applied to the slidable elastic strap 8 is greater than the limit value of torque, to allow the passage the protrusion 12 crossing the threshold 11, and allow an angular stroke of the flange 8 under the effect of torque until the next meeting between a threshold 11 and an outgrowth 12.
- the slidable elastic flange 8 forms a closed contour.
- the spring 2 winds progressively around the bung 4 until reaching the maximum armature, and the cooperation between such an outgrowth 12 of the slidable elastic flange 8 with such a threshold 11 of the inner track 6 of said barrel drum 7 forces the slidable elastic flange 8 to deform under the action of the applied torque, to effect a clutch under the action of which the slidable elastic flange 8 and the spring 2 advance a notch.
- the relative shapes of the inner race 6 of the barrel drum 7 and the protrusion 12 of the slidable elastic flange 8 are arranged so that the clutch corresponds to a predetermined maximum torque.
- the clutch is obtained only by an elastic deformation of a portion of the sliding elastic flange 8 greater than 50% of its periphery.
- the figure 1 shows the spring 2 fully armed, which means that if the winding continues (manual or automatic), the shape flange 8 will deform to disengage the barrel drum 7.
- a cylinder spring 2 of standard shape can either be connected to a flange 8 of independent form by a bonding process, brazing or welding, or preferably form with this flange 8 of a single piece, preferably in the same material.
- the mainspring 2 winds progressively around the bung 4 until it reaches maximum arming.
- the specific shape of the drum then forces the form flange 8 to deform so that the clutch takes place.
- the relative shapes of the drum 7 and the shape flange 8 are optimized so that the clutching torque corresponds to the desired maximum torque, which is determined according to the properties of the mainspring and the coefficient of friction.
- the inner track 6 comprises a plurality of peripheral housings 9 each having a bottom 10 located at the greatest distance DMAX of the pivot axis D. These housings 9 are each separated from its neighbor by such a threshold 11 located at the most small distance DMIN from the pivot axis D.
- the sliding flange 8 is preferably and preferably integral with the spring 2 with which it then forms a one-piece assembly.
- This sliding flange 8 comprises, in the non-limiting embodiments of Figures 1 to 5 , a plurality of such protrusions 12, each of which, in the free state, is of maximum radius RMAX with respect to the pivot axis D.
- These protrusions 12 are each separated from its neighbor by a junction surface 13 comprising a zone of minimum radius RMIN with respect to the pivot axis D, the maximum radius RMAX in the free state being greater than the minimum distance DMIN and less than the maximum distance DMAX.
- the joining surfaces 13 can be left-handed, concave or convex, or flat as on the figure 5 .
- the invention is also usable with a barrel whose inner track 6 has only one housing 9, as visible on the figure 6 .
- the figure 7 also illustrates a configuration with a single housing 9, but operating in an inverted manner, the sliding flange 8 still being in friction against a wall of the inner track 6, except when its protrusion 12 cooperates with the housing 9: the sensation for the user who manually raises his watch is similar, albeit reversed, and he feels just as distinctly the passage of a notch.
- These two Figures 6 and 7 also illustrate a flange 8 with a single protrusion 12.
- each passage of a threshold 11 by a protrusion 12 reduces the available torque at the drum 7 from a higher slip value MGS to a lower slip moment value MGI, which is less than the upper slip value MGS.
- the inner race 6 comprises a plurality of peripheral housings 9 of cycloidal shape.
- the figure 2 shows a flange 8 with five cycloids, but in another version it is possible to have more or less depending on the desired sizing, for example ten on the figure 4 .
- the inner race 6 and the sliding elastic strap 8 are of identical shape and of homothetic dimensions.
- the inner track 6 and the slidable elastic flange 8 are of different shapes, depending on the desired sizing. For example, it is possible to combine the springs 2 of Figures 4 and 5 with the drum 7 of the figure 2 .
- the inner track 6 has a first number of thresholds 11, the slidable elastic flange 8 has a second number of excrescences 12, and the second number is greater than or equal to the first number. In other variants, the inner track 6 has a first number of thresholds 11, the sliding elastic flange 8 has a second number of growths 12, and the second number is smaller than the first number.
- the spring 2 is fixed at several points of the slidable elastic flange 8.
- the invention is applicable to any type of barrel: movement drive barrel, or ringer barrel, or other.
- the invention also relates to a clockwork movement 30 comprising such a barrel 1, whose plug 4 is arranged to cooperate with manual winding means 20, for example by means of a ratchet or the like.
- the invention relates to a timepiece 40 comprising such a movement 30, and / or at least one mechanism comprising such a barrel 1, such as a striking mechanism, or a waking mechanism, or the like.
- this timepiece is a watch.
Description
L'invention concerne un barillet d'horlogerie, comportant au moins un ressort coopérant à son extrémité intérieure avec une bonde pivotant autour d'un axe de pivotement, et à son extrémité extérieure avec une piste intérieure d'un tambour de barillet par une bride élastique glissante, où ladite piste intérieure et ladite bride élastique glissante sont chacune de forme non circulaire, et imbriquées l'une dans l'autre dans l'état libre de ladite bride élastique glissante, et sont agencées de façon à ce qu'au moins une excroissance saillant radialement vers l'extérieur que comporte ladite bride élastique glissante coopère en butée avec au moins un seuil saillant radialement vers l'intérieur que comporte ladite piste intérieure quand le couple appliqué à ladite bride élastique glissante est inférieur à une valeur limite de couple, et où au moins une dite excroissance de ladite bride élastique glissante est soumise à un rétreint radial quand le couple appliqué à ladite bride élastique glissante est supérieur à ladite valeur limite de couple, pour autoriser le passage de ladite excroissance en franchissement dudit seuil et autoriser une course angulaire de ladite bride sous l'effet dudit couple jusqu'à la prochaine rencontre entre un dit seuil et une dite excroissance, et où ladite bride élastique glissante forme un contour fermé. The invention relates to a watch cylinder, comprising at least one spring cooperating at its inner end with a bung pivoting about a pivot axis, and at its outer end with an inner track of a drum barrel by a flange. slidable elastic, wherein said inner track and said slidable elastic flange are each non-circular in shape, and nested one inside the other in the free state of said slidable elastic flange, and are arranged so that at least a protrusion protruding radially outwardly that comprises said sliding elastic flange cooperates in abutment with at least one radially inward projecting threshold that includes said inner race when the torque applied to said sliding elastic flange is less than a torque limit value. , and wherein at least one said protrusion of said slidable elastic flange is subjected to a radial necking when the torque apples said slidable elastic flange is greater than said limit torque value, to allow the passage of said protrusion crossing said threshold and allow an angular stroke of said flange under the effect of said torque until the next meeting between a said threshold and said protrusion, and wherein said slidable elastic flange forms a closed contour.
L'invention concerne encore un mouvement d'horlogerie comportant un tel barillet, dont la bonde est agencée pour coopérer avec des moyens de remontage manuel.The invention also relates to a watch movement comprising such a barrel, whose bung is arranged to cooperate with manual winding means.
L'invention concerne une pièce d'horlogerie comportant un tel mouvement, ou/et au moins un mécanisme comportant un tel barillet.The invention relates to a timepiece comprising such a movement, and / or at least one mechanism comprising such a cylinder.
L'invention concerne le domaine des barillets d'horlogerie pour stockage d'énergie comportant un ressort.The invention relates to the field of time barrels for energy storage comprising a spring.
L'invention concerne la transmission d'énergie par un ressort de barillet à un tambour de barillet via un élément appelé traditionnellement bride. En général, pour les mouvements à remontage manuel, les ressorts de barillet sont liés au tambour via une bride fixe. Pour les mouvements automatiques, le transfert de la force se fait via une bride glissante qui permet de désolidariser temporairement l'extrémité du ressort du tambour au-dessus d'un couple limite de débrayage.The invention relates to the transmission of energy by a mainspring to a barrel drum via an element traditionally called a flange. In general, for manual winding movements, the barrel springs are connected to the drum via a fixed flange. For automatic movements, the transfer of force is via a slidable flange that temporarily disconnects the end of the spring of the drum above a limit declutching torque.
La bride fixe permet de maximiser les propriétés du ressort, notamment le nombre de tours, mais a l'inconvénient de générer un surcouple lors de l'armage maximal : l'utilisateur ne sent que le ressort est totalement remonté que lorsque le couple devient significativement plus important. Ce surcouple peut être à l'origine de problèmes de fatigue (rupture) mais aussi de problèmes chronométriques.The fixed flange makes it possible to maximize the properties of the spring, in particular the number of turns, but has the disadvantage of generating an overtorque during the maximum arming: the user does not feel that the spring is totally reassembled only when the torque becomes significantly most important. This overtorque can be the cause of problems of fatigue (rupture) but also of chronometric problems.
La bride glissante est indispensable pour les mouvements automatiques, néanmoins il est difficile pour l'utilisateur qui remonte manuellement son mouvement de savoir, en l'absence d'indication de réserve de marche, quand le barillet est totalement remonté. La présence d'une bride glissante génère une variation du couple lorsque le barillet est armé au maximum entre le moment de glissement supérieur (MGS) et le moment de glissement inférieur (MGI). De plus, ce système ne permet pas de bien maîtriser le couple à partir duquel se fait le débrayage. Enfin, ces composants, et notamment le tambour de barillet, sont souvent sujet à de l'usure lors des tests de vieillissement.The slippery flange is essential for automatic movements, however it is difficult for the user who manually goes back his movement to know, in the absence of indication of power reserve, when the barrel is fully reassembled. The presence of a sliding flange generates a variation of the torque when the barrel is armed at the maximum between the upper slip moment (MGM) and the lower slip moment (MGI). In addition, this system does not allow to control the torque from which the declutching is done. Finally, these components, and in particular the barrel drum, are often subject to wear during aging tests.
Le document
Le document
Le document
L'invention propose un nouveau système de transmission d'effort entre la bride et le tambour de barillet. Elle consiste en une forme spécifique du tambour de barillet (forme non cylindrique) et en une bride dite flexible, dont la forme est adaptée à celle du ressort de barillet. En effet, cette bride doit pouvoir transmettre l'effort du ressort de barillet au tambour, et, selon l'invention, a la possibilité de se déformer pour que, lorsqu'un couple donné est atteint, la bride puisse se désolidariser du tambour et ainsi désarmer légèrement le ressort de barillet sans faire tourner le tambour.The invention proposes a new force transmission system between the flange and the barrel drum. It consists of a specific form of the barrel drum (non-cylindrical shape) and a so-called flexible flange, whose shape is adapted to that of the mainspring. Indeed, this flange must be able to transmit the force of the mainspring to the drum, and, according to the invention, has the possibility of deforming so that, when a given torque is reached, the flange can disengage from the drum and thus disarm the barrel spring slightly without rotating the drum.
A cet effet, l'invention concerne un barillet d'horlogerie selon la revendication 1.For this purpose, the invention relates to a watch cylinder according to
L'invention concerne encore un mouvement d'horlogerie comportant un tel barillet, dont la bonde est agencée pour coopérer avec des moyens de remontage manuel.The invention also relates to a watch movement comprising such a barrel, whose bung is arranged to cooperate with manual winding means.
L'invention concerne une pièce d'horlogerie comportant un tel mouvement, ou/et au moins un mécanisme comportant un tel barillet.The invention relates to a timepiece comprising such a movement, and / or at least one mechanism comprising such a cylinder.
D'autres caractéristiques et avantages de l'invention apparaîtront à la lecture de la description détaillée qui va suivre, en référence aux dessins annexés, où :
- la
figure 1 représente, de façon schématisée et en plan, un barillet selon l'invention, avec un ressort de barillet porteur d'une bride de forme porteuse d'une pluralité d'excroissances, montée dans un tambour de barillet comportant une succession de logements séparés par des seuils; dans cette configuration, le ressort est complètement armé ; - la
figure 2 représente, de façon schématisée et en perspective, le tambour de lafigure 1 , - la
figure 3 représente, de façon schématisée et en perspective, le ressort de lafigure 1 équipé de sa bride de forme laquelle comporte une alternance d'excroissances et de surfaces de jonction en creux; - la
figure 4 représente, de façon schématisée et en perspective, un ressort selon une variante de lafigure 3 avec davantage d'excroissances, convenant aussi au tambour de lafigure 2 ; - la
figure 5 représente, de façon schématisée et en perspective, un ressort selon une variante de lafigure 3 avec une alternance d'excroissances et de surfaces de jonction planes, convenant aussi au tambour de lafigure 2 ; - la
figure 6 représente, de façon similaire à lafigure 1 , un barillet selon l'invention, avec une bride comportant une seule excroissance et un tambour de barillet comportant un logement unique; - la
figure 7 représente une configuration inversée de lafigure 6 ; - la
figure 8 représente, sous forme d'un schéma-blocs, une pièce d'horlogerie comportant un mouvement comportant lui-même un tel barillet manoeuvré par un mécanisme de remontage manuel actionnée par une couronne.
- the
figure 1 represents schematically and in plan, a barrel according to the invention, with a barrel spring carrying a flange of form carrying a plurality of excrescences, mounted in a barrel drum comprising a succession of housings separated by thresholds; in this configuration, the spring is fully armed; - the
figure 2 represents, schematically and in perspective, the drum of thefigure 1 , - the
figure 3 represents, schematically and in perspective, the spring of thefigure 1 equipped with its shaped flange which comprises an alternation of excrescences and recessed junction surfaces; - the
figure 4 represents schematically and in perspective, a spring according to a variant of thefigure 3 with more excrescences, also suitable for the drum of thefigure 2 ; - the
figure 5 represents schematically and in perspective, a spring according to a variant of thefigure 3 with an alternation of growths and planar joining surfaces, also suitable for the drum of thefigure 2 ; - the
figure 6 represents, similarly to thefigure 1 , a barrel according to the invention, with a flange having a single protrusion and a barrel drum having a single housing; - the
figure 7 represents an inverted configuration of thefigure 6 ; - the
figure 8 represents, in the form of a block diagram, a timepiece comprising a movement comprising itself such a cylinder operated by a manual winding mechanism actuated by a crown.
L'invention concerne un barillet 1 d'horlogerie, comportant au moins un ressort 2 coopérant :
- à son extrémité intérieure 3 avec une
bonde 4 pivotant autour d'un axe de pivotement D, - et à son extrémité extérieure 5 avec une piste intérieure 6 d'un tambour de
barillet 7 par une bride élastique glissante 8.
- at its
inner end 3 with abung 4 pivoting about a pivot axis D, - and at its
outer end 5 with aninner race 6 of abarrel drum 7 by a slidableelastic strap 8.
La piste intérieure 6 et la bride élastique glissante 8 sont chacune de forme non circulaire, et elles sont imbriquées l'une dans l'autre dans l'état libre de la bride élastique glissante 8.The
La bride élastique glissante 8 comporte au moins une excroissance 12 saillant radialement vers l'extérieur.The slidable
La piste intérieure 6 comporte au moins un seuil 11 saillant radialement vers l'intérieur, vers l'axe de pivotement D.The
La piste intérieure 6 et la bride élastique glissante 8 sont agencées de façon à ce qu'au moins une telle excroissance 12 coopère en butée avec au moins un tel seuil 11, quand le couple appliqué à la bride élastique glissante 8 est inférieur à une valeur limite de couple.The
Et au moins une telle excroissance 12 est soumise à un rétreint radial, du fait de l'élasticité de la bride élastique glissante 8, quand le couple appliqué à la bride élastique glissante 8 est supérieur à la valeur limite de couple, pour autoriser le passage de l'excroissance 12 en franchissement du seuil 11, et autoriser une course angulaire de la bride 8 sous l'effet du couple jusqu'à la prochaine rencontre entre un seuil 11 et une excroissance 12.And at least one
Dans une variante préférée, la bride élastique glissante 8 forme un contour fermé.In a preferred embodiment, the slidable
Lors de l'armage, le ressort 2 s'enroule progressivement autour de la bonde 4 jusqu'à atteindre l'armage maximum, et la coopération entre un telle excroissance 12 de la bride élastique glissante 8 avec un tel seuil 11 de la piste intérieure 6 dudit tambour de barillet 7 oblige la bride élastique glissante 8 à se déformer sous l'action du couple appliqué, pour effectuer un débrayage sous l'action duquel la bride élastique glissante 8 et le ressort 2 avancent d'un cran.During the winding, the
Les formes relatives de la piste intérieure 6 du tambour de barillet 7 et de l'excroissance 12 de la bride élastique glissante 8 sont agencées pour que le débrayage corresponde à un couple maximum prédéterminé.The relative shapes of the
De préférence, le débrayage est obtenu seulement par une déformation élastique d'une portion de la bride élastique glissante 8 supérieure à 50% de sa périphérie.Preferably, the clutch is obtained only by an elastic deformation of a portion of the sliding
La
Un ressort de barillet 2 de forme standard peut, soit être relié soit à une bride de forme 8 indépendante par un procédé de collage, brasure ou soudage, soit de préférence former avec cette bride de forme 8 une pièce monobloc, de préférence dans le même matériau.A
Lorsque le barillet est complètement désarmé, les spires sont enroulées directement sur la bride de forme 8.When the barrel is completely disarmed, the turns are wound directly on the
Lors de l'armage, le ressort de barillet 2 s'enroule progressivement autour de la bonde 4 jusqu'à atteindre l'armage maximum. La forme spécifique du tambour oblige alors la bride de forme 8 à se déformer pour que le débrayage s'effectue. Les formes relatives du tambour 7 et de la bride de forme 8 sont optimisées pour que le couple de débrayage corresponde au couple maximum souhaité, lequel est déterminé en fonction des propriétés du ressort de barillet et du coefficient de frottement.During the winding, the
Lorsqu'un débrayage est effectué, c'est-à-dire lorsque la bride de forme et le ressort de barillet ont avancé d'un cran, le couple disponible au tambour de barillet est plus faible (MGI moment de glissement inférieur).When a disengagement is made, that is to say when the shape flange and the barrel spring have advanced a notch, the available torque drum barrel is lower (MGI lower slip moment).
Selon l'invention, tel que visible sur les
La bride glissante 8 est avantageusement et préférentiellement solidaire du ressort 2 avec lequel elle forme alors un ensemble monobloc.The sliding
Cette bride glissante 8 comporte, dans les réalisations nullement limitatives des
Les surfaces de jonction 13 peuvent être gauches, concaves ou convexes, ou encore planes comme sur la
Le rétreint radial des excroissances 12, grâce à l'élasticité de la bride glissante 8, et sous l'action du couple appliqué, autorise la diminution de leur rayon de passage par rapport à l'axe de pivotement D à une valeur inférieure ou égale à la distance minimale DMIN pour passer un tel seuil 11.The radial shrinkage of the
L'invention est également utilisable avec un barillet dont la piste interne 6 ne comporte qu'un seul logement 9, tel que visible sur la
On peut, encore, utiliser un barillet avec plusieurs logements 9, tel que visible sur la
En position d'armage maximal du ressort 2, chaque passage d'un seuil 11 par une excroissance 12 ramène le couple disponible au niveau du tambour 7 d'une valeur de glissement supérieur MGS à une valeur de moment de glissement inférieur MGI, qui est inférieure à la valeur de glissement supérieur MGS.In the maximum arming position of the
Dans certaines variantes, comme sur les
Dans certaines variantes, comme sur les
Dans certaines variantes, la piste intérieure 6 et la bride élastique glissante 8 sont de formes différentes, selon le dimensionnement souhaité. On peut par exemple combiner les ressorts 2 des
Dans certaines variantes, la piste intérieure 6 comporte un premier nombre de seuils 11, la bride élastique glissante 8 comporte un deuxième nombre d'excroissances 12, et le deuxième nombre est supérieur ou égal au premier nombre. Dans d'autres variantes, la piste intérieure 6 comporte un premier nombre de seuils 11, la bride élastique glissante 8 comporte un deuxième nombre d'excroissances 12, et le deuxième nombre est inférieur au premier nombre.In some embodiments, the
Dans une variante particulière, le ressort 2 est fixé en plusieurs points de la bride élastique glissante 8.In a particular variant, the
L'invention est applicable à tout type de barillet : barillet d'entraînement du mouvement, ou barillet de sonnerie, ou autre.The invention is applicable to any type of barrel: movement drive barrel, or ringer barrel, or other.
L'invention concerne encore un mouvement d'horlogerie 30 comportant un tel barillet 1, dont la bonde 4 est agencée pour coopérer avec des moyens de remontage manuel 20, par exemple par l'intermédiaire d'un rochet ou similaire.The invention also relates to a
L'invention concerne une pièce d'horlogerie 40 comportant un tel mouvement 30, ou/et au moins un mécanisme comportant un tel barillet 1, comme un mécanisme de sonnerie, ou encore un mécanisme de réveil, ou similaire. De façon préférée, cette pièce d'horlogerie est une montre.The invention relates to a
L'invention procure de nombreux avantages :
- le système permet de maîtriser directement le couple de débrayage du ressort de barillet 2 avec le tambour (MGS) via le dimensionnement de la
bride de forme 8 ; - le système peut être intégré à un mécanisme à remontage
manuel 20, commandépar une couronne 21, ou une targette, ou similaire, et limiter ainsi le surcouple présent généralement à l'armage maximal quand on utilise une bride fixe. Ceci permet de limiter l'augmentation des contraintes, qui constituent une cause de rupture directe ou par fatigue, et également d'éviter les problèmes chronométriques causés par le surcouple (notamment le rebat) ; - ce type de géométrie permet d'introduire une sensation de crans pour l'utilisateur lors de la manoeuvre de remontage lorsque l'armage maximum est atteint. ;
- l'invention permet de réaliser la fonction de débrayage au travers de la déformation globale d'un composant élastique : à égalité de couple de débrayage, la contrainte dans la bride est inférieure à celle d'un barillet classique ;
- le ressort peut, encore, être fixé en plusieurs points de la bride afin de mieux répartir la contrainte dans la liaison entre le ressort et la bride ;
- l'invention est utilisable pour tous les mouvements ou mécanismes horlogers et assimilés, notamment les boîtes à musique, qui utilisent un ressort de barillet comme source d'énergie, et en particulier les mouvements à remontage manuel, en remplacement d'une bride fixe.
- the system makes it possible to directly control the disengaging torque of the
mainspring 2 with the drum (MGS) via the dimensioning of theform flange 8; - the system can be integrated with a manual winding
mechanism 20, controlled by aring 21, or a bolt, or the like, and thus limit the overtorque usually present at the maximum armature when using a fixed flange. This makes it possible to limit the increase in stresses, which constitute a cause of direct or fatigue failure, and also to avoid the chronometric problems caused by the over-torque (especially the rebate); - this type of geometry makes it possible to introduce a sensation of notches for the user during the winding maneuver when maximum arming is reached. ;
- the invention makes it possible to perform the disengaging function through the overall deformation of an elastic component: at equal release torque, the stress in the flange is smaller than that of a conventional barrel;
- the spring can also be fixed at several points of the flange to better distribute the stress in the connection between the spring and the flange;
- the invention is usable for all movements or mechanisms and similar watchmaking, including music boxes, which use a mainspring as a power source, and in particular manual winding movements, replacing a fixed flange.
Claims (14)
- Timepiece barrel (1), including at least one mainspring (2) cooperating at the inner end (3) thereof with a core (4) pivoting about a pivot axis (D), and at the outer end (5) thereof with an inner track (6) of a barrel drum (7) by means of a resilient sliding bridle (8), wherein said inner track (6) and said resilient sliding bridle (8) are each of non-circular shape, and nest one inside the other in the free state of said resilient sliding bridle (8), and are arranged such that at least one outwardly radially projecting raised portion (12) comprised in said resilient sliding bridle (8) is abuttingly engaged with at least one inwardly radially projecting sill (11) comprised in said inner track (6) when the torque applied to said resilient sliding bridle (8) is less than a torque limit value, and wherein at least one said raised portion (12) of said resilient sliding bridle (8) is subjected to a radial constriction when the torque applied to said resilient sliding bridle (8) is greater than said torque limit value, to allow said raised portion (12) to pass over said sill (11) and to allow said bridle (8) to travel angularly under the effect of said torque until the next encounter between one said sill (11) and one said raised portion (12), and where said resilient sliding bridle (8) forms a closed contour, characterized in that said resilient sliding bridle (8) forms a closed contour surrounding said core (4), and in that said inner track (6) includes a plurality of peripheral housings (9) each including a base (10) located at the greatest distance (DMAX) from said pivot axis (D) and said housings (9) are each separated from the next housing by a said sill (11) located at the smallest distance (DMIN) from said pivot axis (D), and in that said sliding bridle (8) is integral with said mainspring (2) and forms a one-piece assembly therewith, and includes a plurality of said raised portions (12), each of which, in the free state, has a maximum radius (RMAX) with respect to said pivot axis (D) and each of which is separated from the next raised portion by a joining surface (13) including an area of minimum radius (RMIN) with respect to said pivot axis (D), said maximum radius (RMAX) in the free state being greater than said minimum distance (DMIN) and less than said maximum distance (DMAX).
- Barrel (1) according to claim 1, characterized in that during the winding operation, said mainspring (2) is gradually wound around said core (4) until the maximum degree of wind is reached and in that the cooperation between a said raised portion (12) of said resilient sliding bridle (8) with a said sill (11) of said inner track (6) of said barrel drum (7) causes said resilient sliding bridle (8) to deform under the action of the applied torque to perform disengagement as a result of which said resilient sliding bridle (8) and said spring (2) move forward one notch.
- Barrel (1) according to claim 2, characterized in that the relative shapes of said inner track (6) of said barrel drum (7) and of said raised portions (12) of said resilient sliding bridle (8) are arranged so that said disengagement corresponds to a predetermined maximum torque.
- Barrel (1) according to claim 2 or 3, characterized in that said disengagement is obtained exclusively by a resilient deformation of one portion of said resilient sliding bridle (8) greater than 50% of the periphery thereof.
- Barrel (1) according to one of claims 1 to 4, characterized in that said radial constriction of said raised portions (12) permits reduction of the radius thereof with respect to said pivot axis (D) to a value lower than or equal to said minimum distance (DMIN) in order to pass over a said sill (11).
- Barrel (1) according to one of claims 1 to 5, characterized in that, in the maximum winding position of said mainspring (2), each passage of a said raised portion (12) over a said sill (11) returns the available torque in said drum (7) from a higher slippage value (MGS) to a lower moment of slippage value (MGI) which is lower than said higher slippage value (MGS).
- Barrel (1) according to one of claims 1 to 6, characterized in that said inner track (6) includes a plurality of peripheral housings (9) of cycloidal shape.
- Barrel (1) according to one of claims 1 to 7, characterized in that said inner track (6) and said resilient sliding bridle (8) are of identical shape and of homothetic dimensions.
- Barrel (1) according to one of claims 1 to 7, characterized in that said inner track (6) and said resilient sliding bridle (8) are of different shapes.
- Barrel (1) according to one of claims 1 to 9, characterized in that said mainspring (2) is fixed at several points of said resilient sliding bridle (8).
- Barrel (1) according to one of claims 1 to 10, characterized in that said inner track (6) includes a first number of said sills (11), in that said resilient sliding bridle (8) includes a second number of said raised portions (12), and in that said second number is greater than or equal to said first number.
- Barrel (1) according to one of claims 1 to 10, characterized in that said inner track (6) includes a first number of said sills (11), in that said resilient sliding bridle (8) includes a second number of said raised portions (12), and in that said second number is lower than or equal to said first number.
- Timepiece movement (30) including a barrel (1) according to one of claims 1 to 12, wherein said core (4) is arranged to cooperate with manual winding means (20).
- Timepiece (40) including a movement (30) according to claim 13 or/and at least one mechanism including one said barrel (1) according to one of claims 1 to 12.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP14177987.6A EP2977827B1 (en) | 2014-07-22 | 2014-07-22 | Clock barrel with improved force transmission |
US14/799,842 US9513601B2 (en) | 2014-07-22 | 2015-07-15 | Timepiece barrel with improved transmission of force |
JP2015141091A JP6014727B2 (en) | 2014-07-22 | 2015-07-15 | Timer barrel |
CN201510431371.XA CN105319937B (en) | 2014-07-22 | 2015-07-21 | The clockwork feed box of transmission with improved power |
HK16109420.3A HK1222001A1 (en) | 2014-07-22 | 2016-08-08 | Timepiece barrel with improved transmission of force |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP14177987.6A EP2977827B1 (en) | 2014-07-22 | 2014-07-22 | Clock barrel with improved force transmission |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2977827A1 EP2977827A1 (en) | 2016-01-27 |
EP2977827B1 true EP2977827B1 (en) | 2017-11-15 |
Family
ID=51211142
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14177987.6A Active EP2977827B1 (en) | 2014-07-22 | 2014-07-22 | Clock barrel with improved force transmission |
Country Status (5)
Country | Link |
---|---|
US (1) | US9513601B2 (en) |
EP (1) | EP2977827B1 (en) |
JP (1) | JP6014727B2 (en) |
CN (1) | CN105319937B (en) |
HK (1) | HK1222001A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019207490A1 (en) * | 2018-04-26 | 2019-10-31 | Patek Philippe Sa Geneve | Timepiece barrel and method for modifying a timepiece movement |
EP3982209B1 (en) | 2020-10-06 | 2023-06-07 | The Swatch Group Research and Development Ltd | Device for limiting the winding of a timepiece barrel |
CN113697612B (en) * | 2021-09-16 | 2023-12-22 | 中国电子科技集团公司第三十八研究所 | Coil spring type multi-cable anti-winding automatic winding device and radar |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1495348A (en) * | 1922-12-06 | 1924-05-27 | Daniel E Odom | Spring motor |
US1720289A (en) * | 1924-12-20 | 1929-07-09 | Daniel E Odom | Overwinding preventer for spring motors |
US2617248A (en) * | 1948-12-31 | 1952-11-11 | Foster H Brown | Overwind preventer |
CH288209A (en) * | 1951-03-14 | 1953-01-15 | Felsa Ag | Clockwork with an automatic winding device with a lockable winding weight. |
US2717527A (en) * | 1953-05-20 | 1955-09-13 | Harold L Rapp | Watchmaking tool for assembling the mainspring assembly of a self-winding watch |
US2993689A (en) * | 1958-06-27 | 1961-07-25 | Sandvik Steel Inc | Power spring |
US3018097A (en) * | 1959-04-08 | 1962-01-23 | Sandvik Steel Inc | Power springs |
US3012431A (en) * | 1959-05-11 | 1961-12-12 | Schmidt Michael | Main spring and bridle torque gauge |
CH494421A (en) * | 1968-01-26 | 1970-09-15 | Omega Brandt & Freres Sa Louis | Barrel for self-winding timepiece |
CH610466B5 (en) * | 1968-10-29 | 1979-04-30 | Vimetal Sa | Drive device for timepiece with spring and barrel |
JPS59132928U (en) * | 1983-02-26 | 1984-09-06 | 平出 英行 | mainspring |
EP1970778B1 (en) * | 2007-03-13 | 2009-09-16 | Montres Breguet S.A. | Timepiece comprising a device indicating the power reserve |
EP2390732A1 (en) * | 2010-05-27 | 2011-11-30 | Association Suisse pour la Recherche Horlogère | Barrel spring |
EP2420899B1 (en) * | 2010-08-19 | 2018-12-19 | ETA SA Manufacture Horlogère Suisse | Barrel for automatically winding timepiece |
CH706432B1 (en) * | 2012-04-25 | 2016-12-15 | Eta Sa Mft Horlogère Suisse | A method of manufacturing a watch barrel shaft, a barrel driving element, a barrel, and a timepiece. |
EP2657794B1 (en) * | 2012-04-25 | 2017-02-01 | ETA SA Manufacture Horlogère Suisse | Barrel spring and arbour |
CN203689018U (en) * | 2013-10-24 | 2014-07-02 | Eta瑞士钟表制造股份有限公司 | Driving element used for clock spring barrel and clock mechanism comprising the driving element |
-
2014
- 2014-07-22 EP EP14177987.6A patent/EP2977827B1/en active Active
-
2015
- 2015-07-15 JP JP2015141091A patent/JP6014727B2/en active Active
- 2015-07-15 US US14/799,842 patent/US9513601B2/en active Active
- 2015-07-21 CN CN201510431371.XA patent/CN105319937B/en active Active
-
2016
- 2016-08-08 HK HK16109420.3A patent/HK1222001A1/en unknown
Non-Patent Citations (1)
Title |
---|
None * |
Also Published As
Publication number | Publication date |
---|---|
EP2977827A1 (en) | 2016-01-27 |
US20160026152A1 (en) | 2016-01-28 |
CN105319937B (en) | 2017-10-13 |
JP2016024193A (en) | 2016-02-08 |
JP6014727B2 (en) | 2016-10-25 |
CN105319937A (en) | 2016-02-10 |
HK1222001A1 (en) | 2017-06-16 |
US9513601B2 (en) | 2016-12-06 |
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