EP2488921B1 - Energy source for a striking mechanism, and timepiece provided with such an energy source - Google Patents

Energy source for a striking mechanism, and timepiece provided with such an energy source Download PDF

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Publication number
EP2488921B1
EP2488921B1 EP10768716.2A EP10768716A EP2488921B1 EP 2488921 B1 EP2488921 B1 EP 2488921B1 EP 10768716 A EP10768716 A EP 10768716A EP 2488921 B1 EP2488921 B1 EP 2488921B1
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EP
European Patent Office
Prior art keywords
springs
energy source
source according
barrel
torque
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EP10768716.2A
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German (de)
French (fr)
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EP2488921A1 (en
Inventor
Stephen Forsey
Florian Corneille
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Complitime SA
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Complitime SA
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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
    • G04B21/00—Indicating the time by acoustic means
    • G04B21/02—Regular striking mechanisms giving the full hour, half hour or quarter hour
    • G04B21/12—Reiterating watches or clocks
    • 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
    • G04B1/12—Driving mechanisms with mainspring with several mainsprings

Definitions

  • the present invention relates to ring-type energy sources of the repeating type for timepieces. It relates more particularly to an energy source comprising a frame, an elastic member arranged to generate a torque, means for arming said elastic member and kinematic connection means for applying said torque to members of the striking mechanism allowing ensure a ringtone.
  • Such energy sources are generally in the form of a single spring disposed in a barrel or in a housing made in the frame.
  • the timepiece is equipped with stamps and hammers arranged to hit the stamps.
  • the energy stored in the spring is sufficient to drive the mechanism in all cases, while ensuring that the ringing frequency varies only slightly during an indication. It is necessary in particular that the ringing works with the maximum of regularity even when the watch must indicate 12:59 for a minute repetitions and 12:45 for a repetition of the quarters, which corresponds to the maximum of hits to hit.
  • a striking mechanism comprising two springs is described in the patent US 249,845 .
  • This mechanism comprises two bungs and two springs wound in the opposite direction. Each bung is connected to a different barrel shaft so that the bungs are not linked in rotation.
  • the object of the present invention is to overcome these disadvantages.
  • the elastic member comprises two springs wound in the same direction in concentric spirals, superimposed and arranged to apply torque to the kinematic connection means.
  • the two springs can be connected in parallel. At first glance, this solution seems less interesting than with springs in series. This is not quite so because the springs can be armed by the same organ as that connected to the kinematic connection means. In this case, this can advantageously be done by the barrel shaft which serves to attach to the inner ends of the two springs. In this way, the outer end of one or both springs can be fixed directly to the frame.
  • the precision of the thickness of the springs is generally insufficient to avoid adjustment of the engine torque.
  • the frame is provided with housings, preferably cylindrical, one of said housings being arranged to receive one of said springs, the latter being secured to the housing wall.
  • the energy source further comprises a ring provided with a toothing and intended to receive the other of said springs.
  • This energy source further comprises a detent device arranged to cooperate with said toothing and allowing adjustment of the arming of said spring.
  • the two springs can however also be connected in series.
  • one of the springs can be connected to a fixed point of the frame by its outer end, to a connecting member, for example a barrel shaft, by its inner end.
  • the second spring is secured to the connecting member by its inner end, and its outer end of the wall of a barrel which provides the function of first element of the kinematic connecting means. It is thus possible to have a motor member having a large number of turns, while having a low ratio height / thickness of blade. Rather than fixing the first spring at a fixed point, it is also possible to have means for angular displacement, so as to adjust the torque of the energy source, and thus the ringing frequency.
  • one of said springs can be connected to a ring provided with a toothing and cooperating with a pawl at its outer end, to a connecting member by its inner end, and the other of said springs can be fixed to said member of connection by its inner end and the wall of a barrel by its outer end, said barrel providing the function of first element of the kinematic connecting means.
  • the energy source is in the form of a module.
  • the invention also relates to a timepiece provided with a repeating ring, comprising hammers and a source of energy as defined above.
  • this energy source is disposed between said hammers.
  • the source of energy as represented in Figures 1 to 3 is in the form of a module 10 comprising a plate 12, two bridges 14 and 16, and a cover 18.
  • the plate 12 and the cover 18 respectively bear bearings 20 and 22.
  • a shaft 24 is engaged in these bearings.
  • the bridges 14 and 16 define a housing 26.
  • the cover 18 is provided with a recess 30 in which a ring 32 is arranged. is provided at its radial periphery with a toothing 32a whose function will be specified later.
  • the shaft 24 has, in some places, a non-cylindrical structure. Bungs 34 and 36 are engaged on this shaft 24, with a central cut of complementary shape to the structure of the shaft 24, so that these bungs are rotatably connected via the shaft 24 and are driven rotating at the same angle when the shaft 24 rotates.
  • leaf springs 38 and 40 are respectively disposed in the housing 26 and the recess 30. They are wound in a spiral, both in the same direction, and fixed by their inner ends respectively to the bungs 34 and 36 and by their outer ends respectively to the wall of the bridge 14 and the wall of the ring 32. In this way, if the shaft 24 is rotated, it drives the springs 38 and 40 by their inner part and tends to arm them.
  • a pawl 42 is positioned by means of a screw 44 on the bridge 16. This pawl is applied by a spring 42a, bearing against a stud 45 mounted on the bridge 16, against the toothing 32a of the ring 32. The pawl 42 prevents the ring 32 from rotating when the shaft 24 arms the spring 38. The pawl 42 is held in place between the bridge 16 and the cover 18.
  • this pawl 42 and the toothing 32a is to allow an adjustment of the ringing speed, by varying the torque exerted by the springs 38 and 40 on the shaft 24, by a pre-arming.
  • Kinematic connection means 46 are arranged on the shaft 24, integral in rotation with the shaft 24. They are intended to cooperate with rakes of the ring, to drive, in a conventional manner, the hammers that includes the timepiece , for hour, quarter and minute ringing.
  • the timepiece comprises, in a well known manner, a flywheel not shown in the drawing.
  • a ratchet wheel 48 is mounted on the shaft 24, integral in rotation.
  • a flywheel 50 is mounted idly on this shaft 24, adjacent to the ratchet wheel 48. It carries a pawl 52 in engagement with the ratchet wheel 48.
  • the wheel 50 remains fixed, because the pawl 52 jumps on the teeth of the ratchet wheel 48, whereas, when the shaft rotates in the opposite direction, during the driving of the ringing means, the steering wheel turns, driving with it the steering wheel speed.
  • the winding of the springs 38 and 40 is ensured, in a conventional manner, by a bolt secured to the timepiece box, cooperating at least mediately with a rack pinion 54, integral in rotation with the shaft 24.
  • the user of the timepiece wishes to listen to the time, it arms the springs 38 and 40 by means of the bolt which is provided with the watch case, which cooperates with the pinion 54.
  • the flywheel 50 remains fixed, because of the ratchet 52.
  • the rakes of the ring are set up, so that when the bolt is released, the springs 38 and 40, thanks to the couple they apply on the tree 24, drive the kinematic connecting means, which cooperate with the rakes to move the hammers that strike the time on the stamps.
  • the main advantage of the invention is the adjustment of the initial ringing torque by partially arming one of the springs in parallel.
  • the two springs must have their respective bungs rotatably connected via the barrel shaft common to these two bungs, thus constituting a common bung. They must be wound in the same direction to be armed, before the ring, by the same organ, namely the barrel shaft.
  • this ringing torque adjustment is as follows: one of the springs 38 is inserted into the housing of the bridge 14 and is prestressed. The assembly is held in position and can not rotate thanks to the pawl 52. Then, the second spring 40 is inserted into the ring 32.
  • the system is retained and can not turn.
  • the watchmaker adjusts the torque to optimize it, he will move the pawl 42 and rotate the ring 32, which will have the effect of pre-arming the spring 40 by means of its flange against the inner wall of the ring 32.
  • Another advantage is the simplification of the system while optimizing it: indeed, it suffices to add the part comprising the second spring 40, the bung 36, the ring 32, the pawl 42 and the cover 18 to the source system.
  • standard energy ringer to improve the constancy of the ringing torque. This system could therefore be relatively easily adapted to any type of standard repeat ring.
  • the springs 38 and 40 are arranged in series.
  • the energy source comprises two barrels, each comprising a drum and a spring.
  • a single tree passes through the two barrels.
  • This tree is provided with two bungs, one in each of the barrels.
  • Each of the barrels serves as a housing for a leaf spring.
  • the winding of the spring is done by acting on the periphery of one of the barrel drums.
  • the spring which is provided with this barrel is armed by applying a torque on the barrel shaft, which is reflected on the spring of the second barrel. This second spring is armed.
  • the connecting means are integral with the drum of the second barrel rather than the shaft, as was the case in the illustrated example.
  • a source of energy as described and shown may be provided with two springs 38 and 40 of identical dimensions, having a length of 110 to 170 mm, a thickness of 0.08 to 0.10 mm and a height of 0. , 70 to 0.90 mm.
  • the diameter of the housing 26 and the inside of the ring 32 is from 5.00 to 5.50 mm.
  • a clearance of 0.05 to 0.10 mm is provided between the springs 38 and 40 and the flat bridge walls 14 and 16, and the bridge 16 and the cover 18.
  • Such a power source can advantageously be used in a movement for a timepiece as schematically and partially represented on the figure 4 .
  • This figure shows the module 10 as represented on the Figures 1 to 3 .
  • This module 10 is fixed on a plate 62.
  • Hammers 64 and 66 are arranged on either side of the module 10.
  • Stamps in the form of son fixed to the plate in a part of it not visible at design, are arranged so that each of the hammers 64 and 66 comes to hit one of them when they are driven by the springs 38 and 40.
  • the fact of placing the energy source that constitutes the module 10 between the hammers 64 and 66 offer a particularly advantageous disposition relative to the space occupied in the movement.
  • it is necessary that the son constituting the stamps are as long as possible. It is therefore necessary that the area occupied by the module is as low as possible, hence the advantage of having two springs barrels superimposed.
  • the energy source according to the invention can, of course, have many variants without departing from the scope of the invention.
  • the energy source can be directly integrated into the movement rather than being in the form of an independent module.
  • the structure of the frame can be made very differently, with more or less component parts.
  • the bearing 22 could be disposed on the bridge 16 and the ring 32 be replaced by a mounted drum drum flying on the shaft 24. It would thus be possible to remove the cover 18.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Clocks (AREA)
  • Measurement Of Unknown Time Intervals (AREA)
  • Springs (AREA)

Description

Domaine techniqueTechnical area

La présente invention se rapporte aux sources d'énergies de mécanisme de sonnerie du type à répétition pour pièces d'horlogerie. Elle concerne plus particulièrement une source d'énergie comprenant un bâti, un organe élastique agencé pour engendrer un couple, des moyens d'armage dudit organe élastique et des moyens de liaison cinématique pour appliquer ledit couple à des organes du mécanisme de sonnerie permettant d'assurer une sonnerie.The present invention relates to ring-type energy sources of the repeating type for timepieces. It relates more particularly to an energy source comprising a frame, an elastic member arranged to generate a torque, means for arming said elastic member and kinematic connection means for applying said torque to members of the striking mechanism allowing ensure a ringtone.

Etat de la techniqueState of the art

De telles sources d'énergie se présentent généralement sous forme d'un seul ressort disposé dans un barillet ou dans un logement pratiqué dans le bâti. La pièce d'horlogerie est équipée de timbres et de marteaux agencés pour venir frapper les timbres. Afin d'assurer une sonnerie aussi harmonieuse que possible, il est nécessaire que l'énergie emmagasinée dans le ressort soit suffisante pour entraîner le mécanisme dans tous les cas et ce, en veillant à ce que la fréquence de sonnerie ne varie que peu au cours d'une indication. Il faut en particulier que la sonnerie fonctionne avec le maximum de régularité même lorsque la montre doit indiquer 12h59 pour une répétions minutes et 12h45 pour une répétition des quarts, ce qui correspond au maximum de coups à frapper.Such energy sources are generally in the form of a single spring disposed in a barrel or in a housing made in the frame. The timepiece is equipped with stamps and hammers arranged to hit the stamps. In order to ensure a ringing tone as harmonious as possible, it is necessary that the energy stored in the spring is sufficient to drive the mechanism in all cases, while ensuring that the ringing frequency varies only slightly during an indication. It is necessary in particular that the ringing works with the maximum of regularity even when the watch must indicate 12:59 for a minute repetitions and 12:45 for a repetition of the quarters, which corresponds to the maximum of hits to hit.

A cet effet, différentes solutions ont été développées. Il est, par exemple possible d'utiliser des moyens faisant varier le bras de levier de manière inversement proportionnelle à la variation de la force appliquée par le ressort sur les moyens de liaison. Cela peut se faire au moyen d'une fusée ou d'un engrenage en spirale. De telles solutions impliquent une grande précision dans le cas de l'engrenage, ou de la place en faisant appel à une fusée.For this purpose, different solutions have been developed. For example, it is possible to use means varying the lever arm inversely proportional to the variation of the force applied by the spring on the connecting means. This can be done by means of a rocket or a spiral gear. Such solutions involve great precision in the case of gearing, or space by using a rocket.

Il est également possible d'obtenir théoriquement un résultat satisfaisant en utilisant un ressort ayant un grand nombre de tours d'armage et une faible épaisseur de lame. Pour que ce couple soit suffisant, il est nécessaire que la hauteur de la lame soit importante. Dans ce cas toutefois, il a été constaté que si le rapport hauteur/épaisseur est trop élevé, les conditions de travail se péjorent. Compte tenu de l'espace dont on dispose, spécialement si la source d'énergie est placée entre les deux marteaux, il n'est pas possible d'éviter cette péjoration.It is also possible to theoretically obtain a satisfactory result by using a spring having a large number of winding turns and a small blade thickness. For this couple to be sufficient, it is necessary that the blade height is important. In this case, however, it has been found that if the height / thickness ratio is too high, the working conditions are worse. Given the space available, especially if the power source is placed between the two hammers, it is not possible to avoid this pejoration.

Un mécanisme de sonnerie comprenant deux ressorts est décrit dans le brevet US 249 845 . Ce mécanisme comprend deux bondes et deux ressorts enroulés dans le sens inverse. Chaque bonde est reliée à un arbre de barillet différent de sorte que les bondes ne sont pas liées en rotation.A striking mechanism comprising two springs is described in the patent US 249,845 . This mechanism comprises two bungs and two springs wound in the opposite direction. Each bung is connected to a different barrel shaft so that the bungs are not linked in rotation.

Par ailleurs, le brevet US 4 363 553 décrit un mécanisme comprenant deux barillets-moteurs, contenant chacun un ressort, enroulés en sens inverse. Ce document ne décrit ni suggère l'utilisation de deux ressorts dans un mécanisme de sonnerie.Moreover, the patent US 4,363,553 describes a mechanism comprising two motor barrels, each containing a spring, wound in the opposite direction. This document neither describes nor suggests the use of two springs in a striking mechanism.

Le but de la présente invention est de pallier ces inconvénients.The object of the present invention is to overcome these disadvantages.

Divulgation de l'inventionDisclosure of the invention

Ce but est atteint grâce au fait que l'organe élastique comporte deux ressorts enroulés dans le même sens en spirales concentriques, superposés et agencés pour appliquer un couple aux moyens de liaison cinématique. Une telle solution permet d'obtenir un rendement sensiblement amélioré.This object is achieved thanks to the fact that the elastic member comprises two springs wound in the same direction in concentric spirals, superimposed and arranged to apply torque to the kinematic connection means. Such a solution makes it possible to obtain a substantially improved efficiency.

Il est en effet apparu qu'une source d'énergie constituée de deux ressorts en spiral superposés présente des conditions de travail bien meilleures que celles fournies par un seul ressort ayant une hauteur plus que doublée. Or, théoriquement, cela devrait être plus favorable avec un seul ressort. En effet, si l'on veut disposer deux ressorts superposés, cela implique qu'il y ait un espace entre eux pour leur permettre de travailler indépendamment. Or la pratique montre que l'utilisation de deux ressorts est plus avantageuse, comme expliqué ci-dessus. Plus précisément, il apparaît que plus le rapport entre la hauteur et l'épaisseur de la lame est élevé, plus le risque est grand que celle-ci se déforme et que les conditions de déroulement du ressort se péjorent.It has indeed emerged that an energy source consisting of two superimposed spiral springs has much better working conditions than those provided by a single spring having a height more than doubled. Now, theoretically, it should be more favorable with a single spring. Indeed, if one wants to have two superimposed springs, this implies that there is a space between them to allow them to work independently. However, practice shows that the use of two springs is more advantageous, as explained above. Specifically, it appears that the higher the ratio between the height and the thickness of the blade, the greater the risk that it is deformed and that spring unwinding conditions are stale.

Dans une première variante, les deux ressorts peuvent être reliés en parallèle. De prime abord, cette solution parait moins intéressante qu'avec des ressorts en série. Il n'en est pas tout à fait ainsi du fait que les ressorts peuvent être armés par le même organe que celui relié aux moyens de liaison cinématique. En l'occurrence, cela peut avantageusement se faire par l'arbre de barillet qui sert de fixation aux extrémités intérieures des deux ressorts. De la sorte, l'extrémité extérieure de l'un ou des deux ressorts peut être fixée directement au bâti.In a first variant, the two springs can be connected in parallel. At first glance, this solution seems less interesting than with springs in series. This is not quite so because the springs can be armed by the same organ as that connected to the kinematic connection means. In this case, this can advantageously be done by the barrel shaft which serves to attach to the inner ends of the two springs. In this way, the outer end of one or both springs can be fixed directly to the frame.

La précision de l'épaisseur des ressorts est généralement insuffisante pour éviter un ajustement du couple moteur. En plaçant deux ressorts, il est possible de les sélectionner par paires, de manière à ce que le couple total soit situé dans un intervalle restreint, pour éviter des moyens d'ajustement du couple.The precision of the thickness of the springs is generally insufficient to avoid adjustment of the engine torque. By placing two springs, it is possible to select them in pairs, so that the total torque is in a small range, to avoid means of adjusting the torque.

Dans le cas où un ajustement du couple initial est envisagé il est possible de le réaliser en armant partiellement un seulement des ressorts en parallèle. L'autre ressort peut ainsi être fixé directement au bâti. Il en résulte que le volume utile peut être augmenté, et ainsi le nombre de tours que peut avoir ce ressort. Dans ce mode de réalisation, le bâti est muni de logements, de préférence cylindriques, l'un desdits logements étant agencé pour recevoir l'un des dits ressorts, celui-ci étant rendu solidaire de la paroi du logement.In the case where an adjustment of the initial torque is envisaged it is possible to achieve it by partially arming only one of the springs in parallel. The other spring can thus be fixed directly to the frame. As a result, the useful volume can be increased, and thus the number of revolutions that this spring can have. In this embodiment, the frame is provided with housings, preferably cylindrical, one of said housings being arranged to receive one of said springs, the latter being secured to the housing wall.

Avantageusement, la source d'énergie comporte, en outre, une bague munie d'une denture et destinée à recevoir l'autre desdits ressorts. Cette source d'énergie comporte, en outre un dispositif d'encliquetage agencé pour coopérer avec ladite denture et permettant un réglage de l'armage dudit ressort.Advantageously, the energy source further comprises a ring provided with a toothing and intended to receive the other of said springs. This energy source further comprises a detent device arranged to cooperate with said toothing and allowing adjustment of the arming of said spring.

Les deux ressorts peuvent toutefois aussi être reliés en série. Dans ce cas, l'un des ressorts peut être relié à un point fixe du bâti par son extrémité extérieure, à un organe de liaison, par exemple un arbre de barillet, par son extrémité intérieure. Le deuxième ressort est solidaire de l'organe de liaison par son extrémité intérieure, et par son extrémité extérieure de la paroi d'un barillet qui assure la fonction de premier élément des moyens de liaison cinématiques. Il est de la sorte possible d'avoir un organe moteur comportant un grand nombre de tours, tout en ayant un faible rapport hauteur/épaisseur de lame. Plutôt que de fixer le premier ressort à un point fixe, il est aussi possible de disposer de moyens permettant un déplacement angulaire, de manière à pouvoir ajuster le couple de la source d'énergie, et ainsi la fréquence de sonnerie.The two springs can however also be connected in series. In this case, one of the springs can be connected to a fixed point of the frame by its outer end, to a connecting member, for example a barrel shaft, by its inner end. The second spring is secured to the connecting member by its inner end, and its outer end of the wall of a barrel which provides the function of first element of the kinematic connecting means. It is thus possible to have a motor member having a large number of turns, while having a low ratio height / thickness of blade. Rather than fixing the first spring at a fixed point, it is also possible to have means for angular displacement, so as to adjust the torque of the energy source, and thus the ringing frequency.

Ainsi, l'un desdits ressorts peut être relié à une bague munie d'une denture et coopérant avec un cliquet par son extrémité extérieure, à un organe de liaison par son extrémité intérieure, et l'autre desdits ressorts peut être fixé audit organe de liaison par son extrémité intérieure et à la paroi d'un barillet par son extrémité extérieure, ledit barillet assurant la fonction de premier élément des moyens de liaison cinématique.Thus, one of said springs can be connected to a ring provided with a toothing and cooperating with a pawl at its outer end, to a connecting member by its inner end, and the other of said springs can be fixed to said member of connection by its inner end and the wall of a barrel by its outer end, said barrel providing the function of first element of the kinematic connecting means.

De manière avantageuse, la source d'énergie se présente sous forme d'un module.Advantageously, the energy source is in the form of a module.

L'invention concerne également une pièce d'horlogerie munie d'une sonnerie à répétition, comportant des marteaux et une source d'énergie telle que définie ci-dessus. De manière avantageuse, cette source d'énergie est disposée entre lesdits marteaux.The invention also relates to a timepiece provided with a repeating ring, comprising hammers and a source of energy as defined above. Advantageously, this energy source is disposed between said hammers.

Brève description des dessinsBrief description of the drawings

L'invention sera mieux comprise à la lecture de la description qui va suivre, donnée à titre d'exemple et faite en référence au dessin dans lequel :

  • les figures 1 et 2 montrent en perspective une source d'énergie pour montre munie d'une sonnerie à répétition vue de dessus sur la figure 1 et de dessous, une partie étant retirée sur la figure 2 ;
  • la figure 3 illustre une vue en coupe une telle source d'énergie; et
  • la figure 4 représente, de manière schématique, une partie de pièce d'horlogerie munie d'une source d'énergie telle qu'illustrée dans les figures 1 à 3.
The invention will be better understood on reading the description which follows, given by way of example and with reference to the drawing in which:
  • the Figures 1 and 2 show in perspective a source of energy for a watch provided with a repetitive bell seen from above on the figure 1 and from below, a part being removed on the figure 2 ;
  • the figure 3 illustrates a sectional view of such a source of energy; and
  • the figure 4 represents, schematically, a timepiece part provided with a source of energy as illustrated in FIGS. Figures 1 to 3 .

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

La source d'énergie telle que représentée aux figures 1 à 3 se présente sous forme d'un module 10 comprenant une platine 12, deux ponts 14 et 16, et un couvercle 18. La platine 12 et le couvercle 18 portent respectivement des paliers 20 et 22. Un arbre 24 est engagé dans ces paliers.The source of energy as represented in Figures 1 to 3 is in the form of a module 10 comprising a plate 12, two bridges 14 and 16, and a cover 18. The plate 12 and the cover 18 respectively bear bearings 20 and 22. A shaft 24 is engaged in these bearings.

Les ponts 14 et 16 définissent un logement 26. Le couvercle 18 est muni d'une creusure 30 dans laquelle est disposée une bague 32. Cette dernière est munie à sa périphérie radiale d'une denture 32a dont la fonction sera précisée ultérieurement.The bridges 14 and 16 define a housing 26. The cover 18 is provided with a recess 30 in which a ring 32 is arranged. is provided at its radial periphery with a toothing 32a whose function will be specified later.

L'arbre 24 présente, en certains endroits, une structure non cylindrique. Des bondes 34 et 36 sont engagées sur cet arbre 24, avec une découpe centrale de forme complémentaire à la structure de l'arbre 24, de telle sorte que ces bondes sont liées en rotation par l'intermédiaire de l'arbre 24 et sont entraînées en rotation selon le même angle lorsque l'arbre 24 tourne.The shaft 24 has, in some places, a non-cylindrical structure. Bungs 34 and 36 are engaged on this shaft 24, with a central cut of complementary shape to the structure of the shaft 24, so that these bungs are rotatably connected via the shaft 24 and are driven rotating at the same angle when the shaft 24 rotates.

Des ressorts-lame 38 et 40 schématiquement représentés sont respectivement disposés dans le logement 26 et la creusure 30. Ils sont enroulés en spirale, tous les deux dans le même sens, et fixés par leurs extrémités intérieures respectivement aux bondes 34 et 36 et par leurs extrémités extérieures respectivement à la paroi du pont 14 et à la paroi de la bague 32. De la sorte, si l'on fait tourner l'arbre 24, il entraîne les ressorts 38 et 40 par leur partie intérieure et tend à les armer.Diagrammatically represented leaf springs 38 and 40 are respectively disposed in the housing 26 and the recess 30. They are wound in a spiral, both in the same direction, and fixed by their inner ends respectively to the bungs 34 and 36 and by their outer ends respectively to the wall of the bridge 14 and the wall of the ring 32. In this way, if the shaft 24 is rotated, it drives the springs 38 and 40 by their inner part and tends to arm them.

Un cliquet 42 est positionné au moyen d'une vis 44 sur le pont 16. Ce cliquet est appliqué par un ressort 42a, en appui contre un plot 45 monté sur le pont 16, contre la denture 32a de la bague 32. Le cliquet 42 empêche la bague 32 de tourner lorsque l'arbre 24 arme le ressort 38. Le cliquet 42 est maintenu en place entre le pont 16 et le couvercle 18.A pawl 42 is positioned by means of a screw 44 on the bridge 16. This pawl is applied by a spring 42a, bearing against a stud 45 mounted on the bridge 16, against the toothing 32a of the ring 32. The pawl 42 prevents the ring 32 from rotating when the shaft 24 arms the spring 38. The pawl 42 is held in place between the bridge 16 and the cover 18.

La fonction de ce cliquet 42 et de la denture 32a est de permettre un réglage de la vitesse de sonnerie, en faisant varier le couple exercé par les ressorts 38 et 40 sur l'arbre 24, par un pré-armage.The function of this pawl 42 and the toothing 32a is to allow an adjustment of the ringing speed, by varying the torque exerted by the springs 38 and 40 on the shaft 24, by a pre-arming.

Des moyens de liaison cinématique 46 sont disposés sur l'arbre 24, solidaires en rotation avec cet arbre 24. Ils sont destinés à coopérer avec des râteaux de la sonnerie, pour entraîner, de manière classique, les marteaux que comporte la pièce d'horlogerie, pour la sonnerie des heures, des quarts et des minutes.Kinematic connection means 46 are arranged on the shaft 24, integral in rotation with the shaft 24. They are intended to cooperate with rakes of the ring, to drive, in a conventional manner, the hammers that includes the timepiece , for hour, quarter and minute ringing.

Pour réguler la vitesse de rotation, la pièce d'horlogerie comprend, de manière bien connue, un volant d'inertie non représenté au dessin. A cet effet une roue à cliquet 48 est montée sur l'arbre 24, solidaire en rotation. Une roue de volant 50 est montée folle sur cet arbre 24, adjacente à la roue à cliquet 48. Elle porte un cliquet 52 en prise avec la roue à cliquet 48. Ainsi, lors de l'armage, la roue 50 reste fixe, du fait que le cliquet 52 saute sur les dents de la roue à cliquet 48, alors que, lorsque l'arbre tourne en sens inverse, durant l'entrainement des moyens de sonnerie, la roue à volant tourne, entrainant avec elle le volant de régulation de vitesse.To regulate the speed of rotation, the timepiece comprises, in a well known manner, a flywheel not shown in the drawing. For this purpose a ratchet wheel 48 is mounted on the shaft 24, integral in rotation. A flywheel 50 is mounted idly on this shaft 24, adjacent to the ratchet wheel 48. It carries a pawl 52 in engagement with the ratchet wheel 48. Thus, during the winding, the wheel 50 remains fixed, because the pawl 52 jumps on the teeth of the ratchet wheel 48, whereas, when the shaft rotates in the opposite direction, during the driving of the ringing means, the steering wheel turns, driving with it the steering wheel speed.

L'armage des ressorts 38 et 40 est assuré, de manière classique, par une targette solidaire de la boite de la pièce d'horlogerie, coopérant au moins médiatement avec un pignon 54 de crémaillère, solidaire en rotation avec l'arbre 24.The winding of the springs 38 and 40 is ensured, in a conventional manner, by a bolt secured to the timepiece box, cooperating at least mediately with a rack pinion 54, integral in rotation with the shaft 24.

Ainsi, lorsque l'utilisateur de la pièce d'horlogerie souhaite écouter l'heure, il arme les ressorts 38 et 40 au moyen de la targette dont est munie la boite de montre, qui coopère avec le pignon 54. Durant cette opération, la roue de volant 50 reste fixe, à cause du cliquet 52. Les râteaux de la sonnerie se mettent en place, de telle sorte que lorsque la targette est lâchée, les ressorts 38 et 40, grâce au couple qu'ils appliquent sur l'arbre 24, entraînent les moyens de liaison cinématique, lesquels coopèrent avec les râteaux pour mouvoir les marteaux qui frappent l'heure sur les timbres.Thus, when the user of the timepiece wishes to listen to the time, it arms the springs 38 and 40 by means of the bolt which is provided with the watch case, which cooperates with the pinion 54. During this operation, the flywheel 50 remains fixed, because of the ratchet 52. The rakes of the ring are set up, so that when the bolt is released, the springs 38 and 40, thanks to the couple they apply on the tree 24, drive the kinematic connecting means, which cooperate with the rakes to move the hammers that strike the time on the stamps.

L'avantage principal de l'invention est l'ajustement du couple initial de sonnerie en armant partiellement l'un des ressorts en parallèle. Pour cela, les deux ressorts doivent avoir leurs bondes respectives liées en rotation par l'intermédiaire de l'arbre de barillet commun à ces deux bondes, constituant ainsi une bonde commune. Ils doivent être enroulés dans le même sens pour être armés, avant la sonnerie, par le même organe, à savoir l'arbre de barillet. En référence à la figure 3, cet ajustement de couple de sonnerie se fait de la manière suivante: un des ressorts 38 est inséré dans le logement du pont 14 et est précontraint. L'ensemble est maintenu en position et ne peut pas tourner grâce au cliquet 52. Ensuite, le second ressort 40 est inséré dans la bague 32. Grâce à la coopération du cliquet 42 avec la denture 32a de la bague 32, le système est retenu et ne peut pas tourner. Lorsque l'horloger ajuste le couple afin de l'optimiser, il déplacera le cliquet 42 et fera tourner la bague 32, ce qui aura pour effet de pré-armer le ressort 40 par le biais de sa bride contre la paroi intérieure de la bague 32.The main advantage of the invention is the adjustment of the initial ringing torque by partially arming one of the springs in parallel. For this, the two springs must have their respective bungs rotatably connected via the barrel shaft common to these two bungs, thus constituting a common bung. They must be wound in the same direction to be armed, before the ring, by the same organ, namely the barrel shaft. With reference to the figure 3 this ringing torque adjustment is as follows: one of the springs 38 is inserted into the housing of the bridge 14 and is prestressed. The assembly is held in position and can not rotate thanks to the pawl 52. Then, the second spring 40 is inserted into the ring 32. Thanks to the cooperation of the pawl 42 with the toothing 32a of the ring 32, the system is retained and can not turn. When the watchmaker adjusts the torque to optimize it, he will move the pawl 42 and rotate the ring 32, which will have the effect of pre-arming the spring 40 by means of its flange against the inner wall of the ring 32.

L'utilisation des deux ressorts en parallèle permet d'obtenir un couple de barillet de sonnerie plus constant, tout en gardant un couple maximal maîtrisé.The use of the two springs in parallel makes it possible to obtain a more constant ringing drum torque while keeping a maximum torque under control.

Un avantage supplémentaire est que comme la bague 32 se trouve du côté accessible pour l'horloger une fois le mouvement monté, il lui sera toujours possible de travailler ce préarmage lorsque le mouvement sera emboîté.An additional advantage is that since the ring 32 is on the accessible side for the watchmaker once the movement is mounted, it will still be possible for him to work this pre-arming when the movement is engaged.

Un autre avantage est la simplification du système tout en l'optimisant: en effet, il suffit d'ajouter la partie comportant le second ressort 40, la bonde 36, la bague 32, le cliquet 42 et le couvercle 18 au système de la source d'énergie standard de sonnerie pour améliorer la constance du couple de sonnerie. Ce système pourrait donc être relativement aisément adapté à tout type de sonnerie à répétition standard.Another advantage is the simplification of the system while optimizing it: indeed, it suffices to add the part comprising the second spring 40, the bung 36, the ring 32, the pawl 42 and the cover 18 to the source system. standard energy ringer to improve the constancy of the ringing torque. This system could therefore be relatively easily adapted to any type of standard repeat ring.

Dans une variante qui n'a pas été représentée, mais qui est évidente pour l'homme du métier, les ressorts 38 et 40 sont disposés en série. Dans ce cas, avantageusement, la source d'énergie comprend deux barillets, chacun comprenant un tambour et un ressort. Un arbre unique passe au travers des deux barillets. Cet arbre est muni de deux bondes, l'une dans chacun des barillets. Chacun des barillets sert de logement à un ressort-lame. L'armage du ressort se fait en agissant sur la périphérie d'un des tambours de barillet. Le ressort dont est muni ce barillet s'arme en appliquant un couple sur l'arbre de barillet, qui se répercute sur le ressort du deuxième barillet. Ce deuxième ressort s'arme donc. Dans ce cas, les moyens de liaison sont solidaires du tambour du deuxième barillet plutôt que de l'arbre, comme c'était le cas dans l'exemple illustré.In a variant which has not been shown, but which is obvious to those skilled in the art, the springs 38 and 40 are arranged in series. In this case, advantageously, the energy source comprises two barrels, each comprising a drum and a spring. A single tree passes through the two barrels. This tree is provided with two bungs, one in each of the barrels. Each of the barrels serves as a housing for a leaf spring. The winding of the spring is done by acting on the periphery of one of the barrel drums. The spring which is provided with this barrel is armed by applying a torque on the barrel shaft, which is reflected on the spring of the second barrel. This second spring is armed. In this case, the connecting means are integral with the drum of the second barrel rather than the shaft, as was the case in the illustrated example.

Typiquement, une source d'énergie telle que décrite et représentée peut être munie de deux ressorts 38 et 40 de dimensions identiques, ayant une longueur de 110 à 170 mm, une épaisseur de 0,08 à 0,10 mm et une hauteur de 0,70 à 0,90 mm. Le diamètre du logement 26 et de l'intérieur de la bague 32 est de 5,00 à 5,50 mm. Un jeu de 0,05 à 0,10 mm est prévu entre les ressorts 38 et 40 et les parois planes de ponts 14 et 16, et du pont 16 et du couvercle 18.Typically, a source of energy as described and shown may be provided with two springs 38 and 40 of identical dimensions, having a length of 110 to 170 mm, a thickness of 0.08 to 0.10 mm and a height of 0. , 70 to 0.90 mm. The diameter of the housing 26 and the inside of the ring 32 is from 5.00 to 5.50 mm. A clearance of 0.05 to 0.10 mm is provided between the springs 38 and 40 and the flat bridge walls 14 and 16, and the bridge 16 and the cover 18.

Une telle source d'énergie peut avantageusement être utilisée dans un mouvement pour pièce d'horlogerie tel que schématiquement et partiellement représenté sur la figure 4. On retrouve sur cette figure le module 10 tel que représenté sur les figures 1 à 3. Ce module 10 est fixé sur une platine 62. Des marteaux 64 et 66 sont disposés de part et d'autre du module 10. Des timbres se présentant sous forme de fils, fixés à la platine dans une partie de celle-ci non visible au dessin, sont disposés de manière à ce que chacun des marteaux 64 et 66 vient frapper l'un d'eux lorsqu'ils sont mus par les ressorts 38 et 40. Le fait de placer la source d'énergie que constitue le module 10 entre les marteaux 64 et 66 offre une disposition particulièrement avantageuse relativement à la place occupée dans le mouvement. Toutefois, pour obtenir une sonnerie de bonne qualité, il est nécessaire que les fils constituant les timbres soient aussi longs que possible. Il est donc nécessaire que le secteur occupé par le module soit aussi faible que possible, d'où l'avantage de disposer de deux ressorts de barillets superposés.Such a power source can advantageously be used in a movement for a timepiece as schematically and partially represented on the figure 4 . This figure shows the module 10 as represented on the Figures 1 to 3 . This module 10 is fixed on a plate 62. Hammers 64 and 66 are arranged on either side of the module 10. Stamps in the form of son, fixed to the plate in a part of it not visible at design, are arranged so that each of the hammers 64 and 66 comes to hit one of them when they are driven by the springs 38 and 40. The fact of placing the energy source that constitutes the module 10 between the hammers 64 and 66 offer a particularly advantageous disposition relative to the space occupied in the movement. However, to obtain a good quality ring, it is necessary that the son constituting the stamps are as long as possible. It is therefore necessary that the area occupied by the module is as low as possible, hence the advantage of having two springs barrels superimposed.

La source d'énergie selon l'invention peut, bien entendu, présenter de nombreuses variantes sans pour autant sortir du cadre de l'invention. Ainsi, la source d'énergie peut être directement intégrée au mouvement plutôt que de se présenter sous forme d'un module indépendant. La structure du bâti peut être réalisée de manière très différente, avec plus ou moins de pièces constitutives. Le palier 22 pourrait être disposé sur le pont 16 et la bague 32 être remplacée par un tambour de barillet monté volant sur l'arbre 24. Il serait ainsi possible de supprimer le couvercle 18.The energy source according to the invention can, of course, have many variants without departing from the scope of the invention. Thus, the energy source can be directly integrated into the movement rather than being in the form of an independent module. The structure of the frame can be made very differently, with more or less component parts. The bearing 22 could be disposed on the bridge 16 and the ring 32 be replaced by a mounted drum drum flying on the shaft 24. It would thus be possible to remove the cover 18.

Ainsi, grâce aux caractéristiques que présente la source d'énergie selon l'invention, il est possible de réaliser une pièce d'horlogerie munie d'une sonnerie à répétition dans laquelle les coups frappés ont une fréquence variant peu, tout en occupant un volume relativement réduit.Thus, thanks to the characteristics of the energy source according to the invention, it is possible to produce a timepiece provided with a repetitive ringing in which the struck beats have a frequency varying little, while occupying a volume relatively small.

Claims (9)

  1. An energy source of a repeater striking mechanism for a timepiece, said source comprising a frame (12,14, 16, 18), an elastic organ arranged to create a torque, means (24, 54) for winding said elastic organ and kinematic connection means (46) for applying said torque to organs of the striking mechanism making it possible to ensure striking, characterized in that the elastic organ comprises two springs (38, 40) wound in the same direction in concentric spirals, superimposed and arranged to apply a torque to the kinematic connection means (46).
  2. The energy source according to claim 1, characterized in that said springs (38, 40) are connected to one another in parallel.
  3. The energy source according to claim 2, characterized in that the frame (12, 14, 16, 18) is provided with housings, one of said housings (26) being arranged to receive one of said springs (38) and to secure it to one of its walls.
  4. The energy source according to claim 3, characterized in that it also comprises a ring (32) provided with a toothing (32a) and intended to receive the other of said springs (40), and in that it also comprises a pawl device (42, 42a) arranged to cooperate with said toothing (32a) and making it possible to adjust the winding of the other (40) of said springs (38, 40).
  5. The energy source according to claim 1, characterized in that said springs are connected to one another serially.
  6. The energy source according to claim 5, characterized in that one of said springs is connected to a stationary point of the frame by its outer end, and to a connecting organ by its inner end, and the other of said springs is secured to said connecting organ by its inner end, and to the wall of a barrel by its outer end, said barrel performing the function of first element of the kinematic connecting means
  7. The energy source according to claim 5, characterized in that one of said springs is connected to a ring provided with a toothing and cooperating with a pawl by its outer end, and to a connecting organ by its inner end, and the other of said springs is secured to said connecting organ by its inner end and to the wall of a barrel by its outer end, said barrel performing the function of first element of the kinematic connecting means.
  8. The energy source according to one of claims 1 to 7, characterized in that it has the form of a module (10).
  9. A timepiece provided with a repeater striking mechanism, comprising hammers (64, 66) and an energy source according to one of claims 1 to 8, characterized in that said energy source is arranged between said hammers (64, 66).
EP10768716.2A 2009-10-12 2010-10-08 Energy source for a striking mechanism, and timepiece provided with such an energy source Active EP2488921B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH15722009A CH701968B1 (en) 2009-10-12 2009-10-12 Power source for alarm and timepiece provided with such an energy source.
PCT/EP2010/065062 WO2011045233A1 (en) 2009-10-12 2010-10-08 Energy source for a striking mechanism, and timepiece provided with such an energy source

Publications (2)

Publication Number Publication Date
EP2488921A1 EP2488921A1 (en) 2012-08-22
EP2488921B1 true EP2488921B1 (en) 2013-10-30

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EP10768716.2A Active EP2488921B1 (en) 2009-10-12 2010-10-08 Energy source for a striking mechanism, and timepiece provided with such an energy source

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EP (1) EP2488921B1 (en)
JP (1) JP5646638B2 (en)
CN (1) CN102576210A (en)
CH (1) CH701968B1 (en)
WO (1) WO2011045233A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107817670A (en) * 2016-09-13 2018-03-20 天津海鸥表业集团有限公司 Double-spring watch driving assembly
DE102016122936B4 (en) * 2016-11-28 2018-11-08 Lange Uhren Gmbh Barrel for a watch

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US249845A (en) * 1881-11-22 Strike-spring for eight-day clocks
CH11254A (en) * 1895-11-18 1896-06-30 Goy Blanc A Advanced repeater watch mechanism
JPS4920559U (en) * 1972-05-23 1974-02-21
CH599580B5 (en) * 1974-08-22 1978-05-31 Longines Montres Comp D
ATE390651T1 (en) * 2000-01-06 2008-04-15 Chopard Manufacture Sa DRIVE DEVICE FOR CLOCK MOVEMENT WITH LARGE POWER RESERVE
ATE516523T1 (en) * 2006-04-12 2011-07-15 Montres Breguet Sa CLOCK WITH A STRIKE COMPRISING A SINGLE BARREL
EP2060957A1 (en) * 2007-11-16 2009-05-20 ETA SA Manufacture Horlogère Suisse Motor element with springs for timepiece movement

Also Published As

Publication number Publication date
CH701968B1 (en) 2015-02-27
CN102576210A (en) 2012-07-11
JP5646638B2 (en) 2014-12-24
JP2013507606A (en) 2013-03-04
EP2488921A1 (en) 2012-08-22
WO2011045233A1 (en) 2011-04-21
CH701968A1 (en) 2011-04-15

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