EP1406132B1 - Coupling mechanism for a chronographe - Google Patents

Coupling mechanism for a chronographe Download PDF

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Publication number
EP1406132B1
EP1406132B1 EP02079166A EP02079166A EP1406132B1 EP 1406132 B1 EP1406132 B1 EP 1406132B1 EP 02079166 A EP02079166 A EP 02079166A EP 02079166 A EP02079166 A EP 02079166A EP 1406132 B1 EP1406132 B1 EP 1406132B1
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EP
European Patent Office
Prior art keywords
spring
coupling
control lever
clutch
mechanism according
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.)
Expired - Lifetime
Application number
EP02079166A
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German (de)
French (fr)
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EP1406132A1 (en
Inventor
Pierre Haefeli
Alphonse Bron
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ETA SA Manufacture Horlogere Suisse
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ETA SA Manufacture Horlogere Suisse
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Priority to EP02079166A priority Critical patent/EP1406132B1/en
Priority to AT02079166T priority patent/ATE324621T1/en
Priority to DE60210973T priority patent/DE60210973T2/en
Publication of EP1406132A1 publication Critical patent/EP1406132A1/en
Application granted granted Critical
Publication of EP1406132B1 publication Critical patent/EP1406132B1/en
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Expired - Lifetime legal-status Critical Current

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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
    • G04B19/00—Indicating the time by visual means
    • G04B19/02—Back-gearing arrangements between gear train and hands
    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F7/00—Apparatus for measuring unknown time intervals by non-electric means
    • G04F7/04—Apparatus for measuring unknown time intervals by non-electric means using a mechanical oscillator
    • G04F7/08—Watches or clocks with stop devices, e.g. chronograph
    • G04F7/0823—Watches or clocks with stop devices, e.g. chronograph with couplings between the chronograph mechanism and the base movement
    • G04F7/0828—Watches or clocks with stop devices, e.g. chronograph with couplings between the chronograph mechanism and the base movement acting in the plane of the movement
    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F7/00—Apparatus for measuring unknown time intervals by non-electric means
    • G04F7/04—Apparatus for measuring unknown time intervals by non-electric means using a mechanical oscillator
    • G04F7/08—Watches or clocks with stop devices, e.g. chronograph

Definitions

  • the present invention relates to a chronograph clutch mechanism by means of a control lever designed on the one hand to prevent blocking when going from a stop position or chronograph position to zero to a running position, on the other hand to accurately adjust the force exerted by the end of the lever resorbant somehow the inevitable manufacturing tolerances at the moving parts constituting said clutch control.
  • the external toothing 3 has twice as many teeth as the internal teeth 2, so that the driving of a step by actuation of a push button successively brings a recess 4 and a flat 6 opposite a predetermined reference position.
  • the clutch control 10 is constituted by a lever having basically three concurrent arms.
  • a first arm 11 has its end pivoted at 12 in the plate 7 or in a mechanism plate 8.
  • a second arm 13 has at its end a tooth 14a held in abutment on a flat portion 6 of the internal control gear 2 by a spring 9 of a resilient arm 15 has at its end a fork 16, preceded by a fold 18 V having a plane 18a inclined against an edge 8a of the plate 8.
  • the object of the invention is therefore to remedy the two major drawbacks of the above-mentioned prior art by providing a chronograph watch having a clutch that is both reliable and easy to handle, and whose operation can easily be adjusted at the end of the assembly. to account for the cumulative effect of manufacturing tolerances.
  • the invention is defined for claim 1.
  • a chronograph clutch mechanism by means of a fork which controls the axial displacement of a clutch wheel to bring it to friction with an intermediate wheel of seconds, or on the contrary to discard it against the force of a return spring.
  • This fork hereinafter referred to as "clutch spring”
  • a control lever which is reciprocated, but according to a first characteristic of the invention, said clutch spring is independent. of the control lever contrary to what has been explained previously for the prior art.
  • This clutch spring is in fact formed of a large arm and a small arm arranged substantially in L, being articulated at the junction of the two arms on the mechanism board or on an adjustment board, the small arm of said clutch spring being urged at its base by the control lever.
  • the clutch spring is articulated in a hinge of an adjustment board formed by a hinge plate, a spacer and a cover, assembled by two through tenons whose ends are guided in translation. by oblong openings made in the mechanism board and in the chronograph bridge.
  • the spacer plate has an extension in which is formed an oblong opening having its major axis perpendicular to the alignment of the tenons, which allows the means of an eccentric to change the distance between the end of the small arm of the spring. clutch and the end of the control lever, and thereby to compensate by means of a final adjustment the manufacturing tolerances of the different parts of the clutch.
  • control lever comprises three concurrent branches, the first having its end pivoted in a mechanism board, the second having its end held by a return spring bearing against the internal toothing of an annular cam comprising a succession of recesses and flats, and the end of the third to actuate the small arm of the clutch spring.
  • FIG. 3 only the constituent elements of the clutch mechanism are shown in plan view, shown even more simplified but on a larger scale in FIG. 4, and in section in FIG. 5.
  • the clutch is shown in the disengaged position.
  • the change of position of the clutch is controlled by an annular cam 1 rotated by a finger 26 actuated by a pusher (not shown) and acting on an external toothing 3, being held in a position determined by a 5.
  • the cam 1 also has an internal toothing 2 formed of a succession of recesses 4 and flats 6.
  • the ratio of the steps between the internal toothing 2 and the external toothing 3 is 1/2 (for example 40 teeth inside and 80 teeth outside), so that the stepwise advance of the cam 1 alternatively brings a recess 4 and a flat 6 opposite a reference position.
  • the clutch as such conventionally comprises a second intermediate wheel 19, engaged with the driving wheel 29 and the small second wheel 25 and a clutch wheel 17, engaged with the chronograph wheel 27 and having at its upper part a flange 17a against which presses a return spring annular blade 21 to hold the two movable 17, 19 in the engaged position (as shown in Figure 7) when there is no external stress.
  • the mechanism for acting on the clutch to move it into the disengaged position by exerting pressure under the flange 17a, comprises three essential elements, namely, a control lever 10, a spring d 20 L clutch and an adjustment board 30.
  • the control lever 10 shown in FIG. 4 in order to better show its outline, comprises three concurrent branches 11, 13 and 15.
  • the branch 11 is pivoted at 12 in the plate 7.
  • the branch 13 has at one end a fold 14 Z completed by a tooth 14a held against the internal toothing 2 of the cam 1 by a return spring 9 bearing against the vertical portion of the fold 14.
  • This Z-fold of the end 14 is imposed only by the location of the mobiles and other parts of the chronograph movement taken as an example, but could equally be replaced by any other type of stop, such as a simple rib.
  • the branch 15 has its end perpendicular to a radial direction of the axis of rotation of the mobiles 17, 19 of the clutch, but has no fork. It will be observed that the particular shape of each leg of the control lever 10 depends solely on the location chosen or imposed for the other mobile constituting the chronograph movement, and that any other form within the reach of the skilled person would still be in the scope of the present invention.
  • the clutch spring 20 comprises a large arm 22 in which the fork is formed and a small arm 24 whose end is urged by the end of the branch 15 of the control lever 10.
  • the clutch spring 20 comprises on both sides of the junction line of the two arms 22, 24 two small pivots 23a, 23b (visible in FIG. 9) mounted in a hinge of a board setting 30 whose construction will be described in more detail below.
  • this clutch spring 20 could be fixed directly on the mechanism board 8, or on a part integral therewith.
  • the adjustment board 30 is formed by the stack of two members 31, 35 disposed on either side of a third member forming a spacer 33.
  • L element 31 has near the edges of one of its ends two small extensions 31a, 31b extending beyond the edge of the spacer 33, said extensions 31a, 31b having ends turned at right angles.
  • the cover member is provided at one of its extended ends with two tabs 35a, 35b located between the curved portions of the extensions 31a, 31b, said tabs extending slightly beyond said extension 31a, 31b. b.
  • These three elements 31, 33, 35 are assembled by two pins 32a, 32b driven through holes provided in said elements, the heads of said tenons 32a, 32b protruding from either side of the stack to form the guide means 32.
  • the tenons 32a, 32b are guided by oblong openings 36a, 36b made in the mechanism board 8 and in the chronograph bridge 28, which limits the play of the adjustment board 30.
  • the spacer 33 is provided with an extension 37 having an oblong opening 37a whose major axis is perpendicular to the alignment of the tenons 32a, 32b.
  • the oblong opening 37a is intended to receive an eccentric 38 which will make it possible to move the adjusting plate 30, and thereby to adjust the pressure exerted by the end of the branch 15 of the control lever 10 on the end of the small arm 24 of the clutch spring 20.
  • the extension 37 also has an orientation perpendicular to the alignment of the tenons 32a, 32b, but it is obvious that said extension could have a different orientation in that the long axis of the oblong opening remains perpendicular to the alignment of the guide pins.
  • This construction has two main advantages. By acting, for example, on the thicknesses, it makes it possible to have both a rigid and non-deformable control and a clutch spring having a certain flexibility that makes it possible to avoid too much friction.
  • the adjustment plate 30 By acting on the eccentric screw 38, the adjustment plate 30 makes it possible to compensate for the inevitable manufacturing tolerances, in particular at the level of the clutch spring 20, the annular leaf spring 21 and the cam 1. As is well known, it can be a little less demanding in terms of tolerances it is possible to manufacture the same product with a slightly lower cost while having, thanks to the invention a high quality.

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

Abstract

A spring loaded (9) control lever (10) is actuated by an internal toothed surface (2) and is in contact with a short arm of an L shaped clutch spring (20). The long arm of the spring is shaped as a fork (22) which separates a clutch wheel (17) and seconds wheel (19) normally in friction contact under spring pressure. Tenons (32a,32b) and an eccentric screw (38) allow adjustment of the distance between the short arm and the control lever

Description

La présente invention concerne un mécanisme d'embrayage de chronographe au moyen d'un levier de commande conçu d'une part pour éviter un blocage lorsqu'on passe d'une position stop ou d'une position chronographe à zéro à une position marche, d'autre part pour ajuster avec précision la force exercée par l'extrémité du levier en résorbant en quelque sorte les inévitables tolérances de fabrication au niveau des pièces mobiles constituant ladite commande d'embrayage.The present invention relates to a chronograph clutch mechanism by means of a control lever designed on the one hand to prevent blocking when going from a stop position or chronograph position to zero to a running position, on the other hand to accurately adjust the force exerted by the end of the lever resorbant somehow the inevitable manufacturing tolerances at the moving parts constituting said clutch control.

Pour mieux comprendre l'invention nous allons d'abord brièvement décrire l'état de la technique le plus proche, qui correspond à la meilleure connaissance de la demanderesse, au brevet CH 678 911, en référence aux figures 1 et 2 qui représentent schématiquement en plan et en coupe une commande d'embrayage dans la position chronographe en marche. Comme on le voit sur la figure 1, l'embrayage est actionné par une came circulaire 1 ayant à l'extérieur une denture d'entraînement 3 sur laquelle agit un levier de manoeuvre actionné par un poussoir (non représenté), ladite came 1 étant maintenue dans une position déterminée au moyen d'un sautoir 5. La came 1 comporte à l'intérieur une deuxième denture de commande 2 dont les dents séparant deux creux successifs 4 de la denture sont tronquées et présentent un méplat 6. La denture extérieure 3 comporte deux fois plus de dents que la denture intérieure 2, de sorte que l'entraînement d'un pas par actionnement d'un bouton-poussoir amène successivement un creux 4 et un méplat 6 en face d'une position de référence déterminée. La commande d'embrayage 10 est constituée par un levier ayant fondamentalement trois bras concourants. Un premier bras 11 a son extrémité pivotée en 12 dans la platine 7 ou dans une planche de mécanisme 8. Un deuxième bras 13 présente à son extrémité une dent 14a maintenue en appui sur un méplat 6 de la denture intérieure de commande 2 par un ressort de rappel 9 en butée sur une partie 14 recourbée en Z. Un troisième bras flexible 15 possède à son extrémité une fourche 16, précédée d'une pliure 18 en V présentant un plan 18a incliné contre un bord 8a de la platine 8. Dans la position embrayée représentée à la figure 2, la roue d'embrayage 17 est entraînée, sous l'action d'un ressort lame annulaire 21, par friction par la roue intermédiaire de secondes 19. Lorsqu'on veut arrêter le chronographe, une pression sur le bouton-poussoir fait tourner la came 1 d'un demi-pas et la dent 14a tombe dans un creux 6, ce qui provoque le glissement du plan incliné 18a contre le bord 8a de la platine 8 jusqu'à une position où la pliure 18 en V se trouve sur la platine 8, ce qui permet à la fourche 16 de désolidariser la roue d'embrayage 17 de la roue intermédiaire de secondes 19 en comprimant le ressort 21. Pour obtenir un bon fonctionnement du mécanisme d'embrayage qui vient d'être décrit, il est donc nécessaire de pouvoir ajuster avec précision tous les paramètres mécaniques et physiques tels que les tolérances au niveau de la came 1, de la commande 10 et les modules d'élasticité relatifs du ressort de rappel 9, du bras 15 de la commande 10 et du ressort annulaire 21.To better understand the invention we will first briefly describe the state of the art closest, which corresponds to the best knowledge of the applicant, the patent CH 678 911, with reference to Figures 1 and 2 which show schematically in plane and in section a clutch control in the chronograph position in operation. As can be seen in FIG. 1, the clutch is actuated by a circular cam 1 having on the outside a driving toothing 3 on which an actuating lever actuated by a pusher (not shown) operates, said cam 1 being maintained in a determined position by means of a jumper 5. The cam 1 has inside a second control toothing 2 whose teeth separating two successive recesses 4 of the toothing are truncated and have a flat surface 6. The external toothing 3 has twice as many teeth as the internal teeth 2, so that the driving of a step by actuation of a push button successively brings a recess 4 and a flat 6 opposite a predetermined reference position. The clutch control 10 is constituted by a lever having basically three concurrent arms. A first arm 11 has its end pivoted at 12 in the plate 7 or in a mechanism plate 8. A second arm 13 has at its end a tooth 14a held in abutment on a flat portion 6 of the internal control gear 2 by a spring 9 of a resilient arm 15 has at its end a fork 16, preceded by a fold 18 V having a plane 18a inclined against an edge 8a of the plate 8. In the the engaged position shown in Figure 2, the clutch wheel 17 is driven, under the action of an annular blade spring 21, by friction by the intermediate wheel of seconds 19. When one wants to stop the chronograph, a pressure on the push-button rotates the cam 1 by half a step and the tooth 14a falls into a recess 6, which causes the sliding of the inclined plane 18a against the edge 8a of the plate 8 to a position where the fold 18 V is on the board 8 , which allows the fork 16 to disengage the clutch wheel 17 from the intermediate wheel of 19 seconds by compressing the spring 21. To obtain a good operation of the clutch mechanism that has just been described, it is therefore necessary to be able to accurately adjust all the mechanical and physical parameters such as the tolerances at the cam 1, the control 10 and the relative elastic modulus of the return spring 9, the arm 15 of the control 10 and the spring annular 21.

Avec ce dispositif on observe très souvent un blocage de la commande 10 lors du retour en position stop ou chronographe à zéro, blocage qui ne peut être supprimé ou réduit qu'en prévoyant des modules d'élasticité tels qu'il faut exercer une pression plus forte. On observera également qu'en position stop ou chronographe à zéro, qui est la position occupée pendant le temps le plus long, le bras flexible 15 est sollicité en permanence, ce qui peut à l'évidence provoquer, au moins partiellement une déformation défavorable à ses propriétés élastiques.With this device is very often observed a blocking of the command 10 when returning to the stop position or chronograph zero, blocking that can be suppressed or reduced by providing elastic modules such as to exert more pressure strong. It will also be observed that in the stop position or chronograph at zero, which is the position occupied during the longest time, the flexible arm 15 is permanently stressed, which can obviously cause, at least partially, an unfavorable deformation to its elastic properties.

L'invention a donc pour objet de remédier aux deux inconvénients majeurs de l'art antérieur sus-mentionné en procurant une montre chronographe ayant un embrayage à la fois fiable et facile à manipuler, et dont le fonctionnement peut facilement être ajusté en fin de montage pour tenir compte de l'effet cumulé des tolérances de fabrication. L'invention est definie for revendication 1.The object of the invention is therefore to remedy the two major drawbacks of the above-mentioned prior art by providing a chronograph watch having a clutch that is both reliable and easy to handle, and whose operation can easily be adjusted at the end of the assembly. to account for the cumulative effect of manufacturing tolerances. The invention is defined for claim 1.

Elle a pour objet un mécanisme d'embrayage de chronographe au moyen d'une fourche qui commande le déplacement axial d'une roue d'embrayage pour l'amener à friction avec une roue intermédiaire de secondes, ou au contraire de l'en écarter contre la force d'un ressort de rappel. Cette fourche, désignée par la suite par "ressort d'embrayage", est actionnée par un levier de commande auquel on imprime un mouvement de va-et-vient, mais selon une première caractéristique de l'invention ledit ressort d'embrayage est indépendant du levier de commande contrairement à ce qui a été exposé précédemment pour l'art antérieur. Ce ressort d'embrayage est en effet formé d'un grand bras et d'un petit bras disposées sensiblement en L, en étant articulé à la jonction des deux bras sur la planche de mécanisme ou sur une planche de réglage, le petit bras dudit ressort d'embrayage étant sollicité à sa base par le levier de commande.It relates to a chronograph clutch mechanism by means of a fork which controls the axial displacement of a clutch wheel to bring it to friction with an intermediate wheel of seconds, or on the contrary to discard it against the force of a return spring. This fork, hereinafter referred to as "clutch spring", is actuated by a control lever which is reciprocated, but according to a first characteristic of the invention, said clutch spring is independent. of the control lever contrary to what has been explained previously for the prior art. This clutch spring is in fact formed of a large arm and a small arm arranged substantially in L, being articulated at the junction of the two arms on the mechanism board or on an adjustment board, the small arm of said clutch spring being urged at its base by the control lever.

Selon une autre caractéristique de l'invention, le ressort d'embrayage est articulé dans une charnière d'une planche de réglage formée par une plaque de charnière, une entretoise et un couvercle, assemblés par deux tenons traversants dont les extrémités sont guidées en translation par des ouvertures oblongues pratiquées dans la planche de mécanisme et dans le pont de chronographe. La plaque formant entretoise comporte une extension dans laquelle est formée une ouverture oblongue ayant son grand axe perpendiculaire à l'alignement des tenons, ce qui permet au moyen d'un excentrique de modifier la distance entre l'extrémité du petit bras du ressort d'embrayage et l'extrémité du levier de commande, et par là-même de compenser au moyen d'un réglage final les tolérances de fabrication des différentes pièces de l'embrayage.According to another characteristic of the invention, the clutch spring is articulated in a hinge of an adjustment board formed by a hinge plate, a spacer and a cover, assembled by two through tenons whose ends are guided in translation. by oblong openings made in the mechanism board and in the chronograph bridge. The spacer plate has an extension in which is formed an oblong opening having its major axis perpendicular to the alignment of the tenons, which allows the means of an eccentric to change the distance between the end of the small arm of the spring. clutch and the end of the control lever, and thereby to compensate by means of a final adjustment the manufacturing tolerances of the different parts of the clutch.

Selon un mode de réalisation préféré le levier de commande comporte trois branches concourantes, la première ayant son extrémité pivotée dans une planche de mécanisme, la deuxième ayant son extrémité maintenue par un ressort de rappel en appui contre la denture intérieure d'une came annulaire comportant une succession de creux et de méplats, et l'extrémité de la troisième permettant d'actionner le petit bras du ressort d'embrayage.According to a preferred embodiment the control lever comprises three concurrent branches, the first having its end pivoted in a mechanism board, the second having its end held by a return spring bearing against the internal toothing of an annular cam comprising a succession of recesses and flats, and the end of the third to actuate the small arm of the clutch spring.

L'invention sera mieux comprise à la lecture de la description suivante donnée à titre d'exemple non limitatif en référence aux dessins annexés dans lesquels :

  • la figure 1 représente en vue de dessus un embrayage de l'art antérieur;
  • la figure 2 est une représentation en coupe de la figure 1 selon la ligne II;
  • la figure 3 représente en vue de dessus le mécanisme d'une montre chronographe dont le mécanisme est limité à l'embrayage selon l'invention;
  • la figure 4 est une vue agrandie des pièces constituant l'embrayage en position stop ou chronographe à zéro;
  • la figure 5 est une représentation en coupe brisée interrompue de la figure 4 selon les lignes V-V;
  • la figure 6 correspond à la figure 4 lorsque l'embrayage est en position chronographe en marche;
  • la figure 7 est une représentation en coupe brisée interrompue de la figure 6 selon les lignes VII-VII;
  • la figure 8 est une représentation en perspective de la planche de réglage du mécanisme d'embrayage;
  • la figure 9 est une vue de dessus de la planche de réglage représentée à la figure 8, et
  • la figure 10 est une coupe du mécanisme de la figure 8 selon la ligne X-X.
The invention will be better understood on reading the following description given by way of non-limiting example with reference to the accompanying drawings in which:
  • Figure 1 shows a top view of a clutch of the prior art;
  • Figure 2 is a sectional representation of Figure 1 along the line II;
  • 3 shows a top view of the mechanism of a chronograph watch whose mechanism is limited to the clutch according to the invention;
  • Figure 4 is an enlarged view of the parts constituting the clutch in the stop position or zero chronograph;
  • Figure 5 is an interrupted broken sectional representation of Figure 4 along lines VV;
  • Figure 6 corresponds to Figure 4 when the clutch is in chronograph position running;
  • Figure 7 is a broken interrupted sectional representation of Figure 6 along lines VII-VII;
  • Figure 8 is a perspective representation of the adjustment plate of the clutch mechanism;
  • FIG. 9 is a view from above of the adjustment board represented in FIG. 8, and
  • Figure 10 is a section of the mechanism of Figure 8 along the line XX.

A la figure 3 on a représenté en vue de dessus uniquement les éléments constitutifs du mécanisme d'embrayage, montrés encore plus simplifiés mais à plus grande échelle à la figure 4, et en coupe à la figure 5. Dans les figures 3, 4 et 5 l'embrayage est représenté en position débrayé. Comme indiqué précédemment le changement de position de l'embrayage est commandé par une came annulaire 1 entraîné en rotation par un doigt 26 actionné par un poussoir (non représenté) et agissant sur une denture extérieure 3, en étant maintenue dans une position déterminée par un sautoir 5. La came 1 comporte également une denture intérieure 2 formée d'une succession de creux 4 et de méplats 6. Le rapport des pas entre la denture intérieure 2 et la denture extérieure 3 est de 1/2 (par exemple 40 dents à l'intérieur et 80 dents à l'extérieur), de sorte que l'avance pas à pas de la came 1 amène alternativement un creux 4 et un méplat 6 en regard d'une position de référence.In FIG. 3, only the constituent elements of the clutch mechanism are shown in plan view, shown even more simplified but on a larger scale in FIG. 4, and in section in FIG. 5. In FIGS. The clutch is shown in the disengaged position. As indicated above, the change of position of the clutch is controlled by an annular cam 1 rotated by a finger 26 actuated by a pusher (not shown) and acting on an external toothing 3, being held in a position determined by a 5. The cam 1 also has an internal toothing 2 formed of a succession of recesses 4 and flats 6. The ratio of the steps between the internal toothing 2 and the external toothing 3 is 1/2 (for example 40 teeth inside and 80 teeth outside), so that the stepwise advance of the cam 1 alternatively brings a recess 4 and a flat 6 opposite a reference position.

L'embrayage en tant que tel comprend de façon classique une roue intermédiaire de seconde 19, en prise avec la roue entraîneuse 29 et la roue de petite seconde 25 et une roue d'embrayage 17, en prise avec la roue de chronographe 27 et ayant à sa partie supérieure une collerette 17a contre laquelle appuie un ressort de rappel à lame annulaire 21 pour maintenir les deux mobiles 17, 19 en position embrayée (comme représenté à la figure 7) lorsqu'il n'existe aucune sollicitation extérieure.The clutch as such conventionally comprises a second intermediate wheel 19, engaged with the driving wheel 29 and the small second wheel 25 and a clutch wheel 17, engaged with the chronograph wheel 27 and having at its upper part a flange 17a against which presses a return spring annular blade 21 to hold the two movable 17, 19 in the engaged position (as shown in Figure 7) when there is no external stress.

Dans l'exemple représenté, le mécanisme permettant d'agir sur l'embrayage, pour le faire passer en position débrayée en exerçant une pression sous la collerette 17a, comporte trois éléments essentiels, à savoir, un levier de commande 10, un ressort d'embrayage 20 en L et une planche de réglage 30.In the example shown, the mechanism for acting on the clutch, to move it into the disengaged position by exerting pressure under the flange 17a, comprises three essential elements, namely, a control lever 10, a spring d 20 L clutch and an adjustment board 30.

Le levier de commande 10, représenté en tramé sur la figure 4 pour mieux en montrer le contour, comporte trois branches concourantes 11, 13 et 15. La branche 11 est pivotée en 12 dans la platine 7. La branche 13 présente à une extrémité une pliure 14 en Z terminée par une dent 14a maintenue contre la denture intérieure 2 de la came 1 par un ressort de rappel 9 venant en appui contre la portion verticale de la pliure 14. Cette pliure en Z de l'extrémité 14 n'est imposée que par l'emplacement des mobiles et autres pièces du mouvement de chronographe pris à titre d'exemple, mais pourrait de façon équivalente être remplacée par n'importe quel autre type de butée, telle qu'une simple nervure. La branche 15 a son extrémité perpendiculaire à une direction radiale de l'axe de rotation des mobiles 17, 19 de l'embrayage, mais ne comporte aucune fourchette. On observera que la forme particulière de chaque branche du levier de commande 10 dépend uniquement de l'emplacement choisi ou imposé pour les autres mobiles constituant le mouvement de chronographe, et que toute autre forme à la portée de l'homme de métier serait encore dans le cadre de la présente invention.The control lever 10, shown in FIG. 4 in order to better show its outline, comprises three concurrent branches 11, 13 and 15. The branch 11 is pivoted at 12 in the plate 7. The branch 13 has at one end a fold 14 Z completed by a tooth 14a held against the internal toothing 2 of the cam 1 by a return spring 9 bearing against the vertical portion of the fold 14. This Z-fold of the end 14 is imposed only by the location of the mobiles and other parts of the chronograph movement taken as an example, but could equally be replaced by any other type of stop, such as a simple rib. The branch 15 has its end perpendicular to a radial direction of the axis of rotation of the mobiles 17, 19 of the clutch, but has no fork. It will be observed that the particular shape of each leg of the control lever 10 depends solely on the location chosen or imposed for the other mobile constituting the chronograph movement, and that any other form within the reach of the skilled person would still be in the scope of the present invention.

Le ressort d'embrayage 20 comporte un grand bras 22 dans lequel est formée la fourchette et un petit bras 24 dont l'extrémité est sollicitée par l'extrémité de la branche 15 du levier de commande 10.The clutch spring 20 comprises a large arm 22 in which the fork is formed and a small arm 24 whose end is urged by the end of the branch 15 of the control lever 10.

Dans l'exemple représenté le ressort d'embrayage 20 comporte de part et d'autre de la ligne de jonction des deux bras 22, 24 deux petits pivots 23a, 23b (visibles sur la figure 9) montés dans une charnière d'une planche de réglage 30 dont la construction sera décrite plus en détails ci-après. Dans un mode de réalisation plus simple, non représenté, ce ressort d'embrayage 20 pourrait être fixé directement sur la planche de mécanisme 8, ou sur une pièce solidaire de celui-ci.In the example shown, the clutch spring 20 comprises on both sides of the junction line of the two arms 22, 24 two small pivots 23a, 23b (visible in FIG. 9) mounted in a hinge of a board setting 30 whose construction will be described in more detail below. In one embodiment more simple, not shown, this clutch spring 20 could be fixed directly on the mechanism board 8, or on a part integral therewith.

En se référant maintenant également aux figures 8, 9 et 10 on voit que la planche de réglage 30 est formée par l'empilement de deux éléments 31, 35 disposés de part et d'autre d'un troisième élément formant une entretoise 33. L'élément 31 comporte près des bords de l'une de ses extrémités deux petites extensions 31 a, 31 b s'étendant au-delà du bord de l'entretoise 33, lesdites extensions 31a, 31 b ayant des extrémités retournées à angle droit. L'élément 35 formant couvercle est pourvu à l'une de ses extrémités prolongée de deux pattes 35a, 35b situées entre les parties recourbées des extensions 31 a, 31 b, lesdites pattes s'étendant légèrement au-delà desdites extension 31 a, 31 b. Ces trois éléments 31, 33, 35 sont assemblés par deux tenons 32a, 32b chassés à travers des trous prévus dans lesdits éléments, les têtes desdits tenons 32a, 32b dépassant de part et d'autre de l'empilement pour constituer les moyens de guidage 32. Les tenons 32a, 32b sont guidés par des ouvertures oblongues 36a, 36b pratiquées dans la planche de mécanisme 8 et dans le pont de chronographe 28, ce qui permet de limiter l'ébat de la planche de réglage 30.Referring now also to Figures 8, 9 and 10 it is seen that the adjustment board 30 is formed by the stack of two members 31, 35 disposed on either side of a third member forming a spacer 33. L element 31 has near the edges of one of its ends two small extensions 31a, 31b extending beyond the edge of the spacer 33, said extensions 31a, 31b having ends turned at right angles. The cover member is provided at one of its extended ends with two tabs 35a, 35b located between the curved portions of the extensions 31a, 31b, said tabs extending slightly beyond said extension 31a, 31b. b. These three elements 31, 33, 35 are assembled by two pins 32a, 32b driven through holes provided in said elements, the heads of said tenons 32a, 32b protruding from either side of the stack to form the guide means 32. The tenons 32a, 32b are guided by oblong openings 36a, 36b made in the mechanism board 8 and in the chronograph bridge 28, which limits the play of the adjustment board 30.

On voit également que, du côté opposé à la charnière, l'entretoise 33 est pourvue d'une extension 37 comportant une ouverture oblongue 37a dont le grand axe est perpendiculaire à l'alignement des tenons 32a, 32b. Comme on le voit sur les figures 4 et 5, l'ouverture oblongue 37a est destinée à recevoir un excentrique 38 qui va permettre de déplacer la plaque de réglage 30, et par là-même d'ajuster la pression exercée par l'extrémité de la branche 15 du levier de commande 10 sur l'extrémité du petit bras 24 du ressort d'embrayage 20. Dans le mode de réalisation décrit l'extension 37 a également une orientation perpendiculaire à l'alignement des tenons 32a, 32b, mais il est bien évident que ladite extension pourrait avoir une toute autre orientation dans la mesure où le grand axe de l'ouverture oblongue demeure perpendiculaire à l'alignement des tenons de guidage.It is also seen that, on the side opposite the hinge, the spacer 33 is provided with an extension 37 having an oblong opening 37a whose major axis is perpendicular to the alignment of the tenons 32a, 32b. As seen in FIGS. 4 and 5, the oblong opening 37a is intended to receive an eccentric 38 which will make it possible to move the adjusting plate 30, and thereby to adjust the pressure exerted by the end of the branch 15 of the control lever 10 on the end of the small arm 24 of the clutch spring 20. In the embodiment described the extension 37 also has an orientation perpendicular to the alignment of the tenons 32a, 32b, but it is obvious that said extension could have a different orientation in that the long axis of the oblong opening remains perpendicular to the alignment of the guide pins.

Cette construction présente essentiellement deux avantages. En agissant par exemple sur les épaisseurs, elle permet d'avoir à la fois une commande 10 rigide et non déformable et un ressort d'embrayage 20 présentant une certaine flexibilité permettant d'éviter trop de friction. En agissant sur la vis à excentrique 38 la planche de réglage 30 permet de compenser les inévitables tolérances de fabrication notamment au niveau du ressort d'embrayage 20, du ressort lame annulaire 21 et de la came 1. Comme on le sait, en pouvant être un peu moins exigeant au niveau des tolérances il est possible de fabriquer le même produit avec un coût un peu inférieur tout en ayant, grâce à l'invention une qualité élevée.This construction has two main advantages. By acting, for example, on the thicknesses, it makes it possible to have both a rigid and non-deformable control and a clutch spring having a certain flexibility that makes it possible to avoid too much friction. By acting on the eccentric screw 38, the adjustment plate 30 makes it possible to compensate for the inevitable manufacturing tolerances, in particular at the level of the clutch spring 20, the annular leaf spring 21 and the cam 1. As is well known, it can be a little less demanding in terms of tolerances it is possible to manufacture the same product with a slightly lower cost while having, thanks to the invention a high quality.

En revenant à la figure 4, on voit qu'en position débrayée la dent 14a est maintenue en appui sur le méplat 6 par le ressort 9, tandis qu'en position embrayée représentée aux figures 6 et 7 la dent 14a tombe dans un creux 4. La came 1 permet donc d'imprimer au levier de commande 10 un mouvement de va-et-vient, mais il est bien évident que ce mouvement pourrait être obtenu de toute autre façon connue de l'homme de métier, sans sortir du cadre de la présente invention.Returning to FIG. 4, it can be seen that in the disengaged position the tooth 14a is held in abutment on the flat part 6 by the spring 9, whereas in the engaged position shown in FIGS. 6 and 7 the tooth 14a falls into a hollow 4 The cam 1 thus makes it possible to print to the control lever 10 a reciprocating movement, but it is quite obvious that this movement could be obtained in any other way known to those skilled in the art, without departing from the scope of the present invention.

Claims (7)

  1. Chronograph coupling mechanism using a fork (16) controlling the axial movement of a coupling wheel (17) to bring it into friction with an intermediate second wheel (19), or, conversely, to move it away therefrom against the force of a return spring (21), said fork (16) being actuated by a control lever (10) performing a reciprocating movement, characterised in that the mechanism includes a coupling spring (20) including a large arm (22) and a small arm (24) disposed in a substantially L-shape independent of control lever (10) and articulated at the junction of its arms (22, 24) on the mechanism plate (8) or on an adjustment plate (30), the large arm (22) of said coupling spring (20) including the fork (16) and the small arm (24) being able to be actuated by one end of the control lever (10).
  2. Coupling mechanism according to claim 1, characterised in that the coupling spring (20) is articulated on an adjustment plate (30) including means for guiding (32) and means for positioning (34) the small arm (24) of said coupling spring (20) with respect to the end of the small arm (24).
  3. Coupling mechanism according to claim 2, characterised in that the guide means (32) are formed by two studs (32a, 32b) allowing the adjustment plate (30) to have a shake limited by oblong apertures (36a, 36b) made in the mechanism plate (8) and in the chronograph bridge (28), said studs (32a, 32b) being driven through a hinge plate (31), a spacer (33) and a cover (35), to form together at one end the hinge of the coupling spring (20).
  4. Coupling mechanism according to claims 2 and 3, characterised in that the positioning means (34) are formed by an extension (37) of the spacer (33) including an oblong aperture (37a) whose large axis is substantially perpendicular to the alignment of the guide studs (32a, 32b), said oblong aperture (37a) being intended to receive a cam (38).
  5. Coupling mechanism according to claim 4, characterised in that the extension (37) including the positioning means (34) is substantially perpendicular to the alignment of the guide studs (32a, 32b).
  6. Coupling mechanism according to claim 1, characterised in that the control lever (10) includes three concurrent branches (11, 13, 15), the first (11) having its end pivoting in a mechanism plate (8), the second (13) having its end (14a) held by a return spring (9) resting against the inner toothing (2) of an annular cam (1) including a succession of hollows (4) and flats (6), and the end of the third (15) allowing the small arm (24) of the coupling spring (20) to be actuated.
  7. Coupling mechanism according to claim 6, characterised in that the second branch (13) of the control lever (10) has its end bent in a Z-shape to form the stop for the return spring (9).
EP02079166A 2002-10-04 2002-10-04 Coupling mechanism for a chronographe Expired - Lifetime EP1406132B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP02079166A EP1406132B1 (en) 2002-10-04 2002-10-04 Coupling mechanism for a chronographe
AT02079166T ATE324621T1 (en) 2002-10-04 2002-10-04 CLUTCH MECHANISM FOR CHRONOGRAPHS
DE60210973T DE60210973T2 (en) 2002-10-04 2002-10-04 Clutch mechanism for chronographs

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH16622002 2002-10-04
EP02079166A EP1406132B1 (en) 2002-10-04 2002-10-04 Coupling mechanism for a chronographe

Publications (2)

Publication Number Publication Date
EP1406132A1 EP1406132A1 (en) 2004-04-07
EP1406132B1 true EP1406132B1 (en) 2006-04-26

Family

ID=32034714

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02079166A Expired - Lifetime EP1406132B1 (en) 2002-10-04 2002-10-04 Coupling mechanism for a chronographe

Country Status (10)

Country Link
US (1) US7021818B2 (en)
EP (1) EP1406132B1 (en)
JP (1) JP4343642B2 (en)
KR (1) KR100972914B1 (en)
CN (1) CN100527021C (en)
AT (1) ATE324621T1 (en)
DE (1) DE60210973T2 (en)
HK (1) HK1063221A1 (en)
SG (1) SG107155A1 (en)
TW (1) TWI269949B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2068211B1 (en) * 2007-12-07 2013-03-13 Omega SA Chronograph control device
JP5100523B2 (en) * 2008-06-16 2012-12-19 セイコーインスツル株式会社 DAY DISPLAY DEVICE AND CLOCK HAVING THE SAME
EP2180383B1 (en) * 2008-10-24 2012-01-25 ETA SA Manufacture Horlogère Suisse Device to assist in maintaining the position of a date disc for a timepiece
DE102013103180B4 (en) 2013-03-28 2014-11-13 Uwe Heinz Chronograph
CH709796A1 (en) * 2014-06-19 2015-12-31 Société Anonyme De La Manufacture D Horlogerie Audemars Piguet & Cie An rocker clutch timepiece.
EP3147728A1 (en) * 2015-09-24 2017-03-29 Harry Winston SA Mechanism for positioning a toothed wheel in a clock movement
EP3324249A1 (en) * 2016-11-17 2018-05-23 Nogerah SA Clutch system for chronograph
EP3489760B1 (en) * 2017-11-22 2020-08-26 Harry Winston SA Timepiece case with push button
EP3502803B1 (en) * 2017-12-19 2020-08-05 Omega SA Adjustable timepiece assembly
EP3671367A1 (en) * 2018-12-21 2020-06-24 ETA SA Manufacture Horlogère Suisse Assembly comprising a support, a plate and attachment means, in particular for a timepiece
JP7275848B2 (en) 2019-05-21 2023-05-18 マツダ株式会社 Processing machine control device and its control method
JP7022237B1 (en) 2021-04-15 2022-02-17 Dmg森精機株式会社 Machine tool chip remover and chip removal method

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Publication number Priority date Publication date Assignee Title
CH596594B5 (en) * 1976-05-24 1978-03-15 Ebauches Sa
CH671492B5 (en) 1987-04-02 1990-03-15 Roventa Henex Sa
CH678911B5 (en) * 1990-04-12 1992-05-29 Ebauchesfabrik Eta Ag
CH682034B5 (en) * 1991-10-14 1994-01-14 Eta S.A. Fabriques D'ebauches Timepiece including a chronograph module adapted on a motor module.
EP1136894B1 (en) * 2000-03-20 2006-10-11 DTH Dubois Technique Horlogère SA Device for return to zero in a chronograph timepiece
JP3466160B2 (en) 2001-03-14 2003-11-10 セイコーインスツルメンツ株式会社 Chronograph watch with hammer
CN100385352C (en) * 2001-03-21 2008-04-30 格拉舒特钟表厂有限责任公司 Chronograph with two rotational directions

Also Published As

Publication number Publication date
EP1406132A1 (en) 2004-04-07
DE60210973D1 (en) 2006-06-01
CN100527021C (en) 2009-08-12
TW200405959A (en) 2004-04-16
US20040066711A1 (en) 2004-04-08
ATE324621T1 (en) 2006-05-15
CN1497400A (en) 2004-05-19
SG107155A1 (en) 2004-11-29
KR100972914B1 (en) 2010-07-28
US7021818B2 (en) 2006-04-04
JP4343642B2 (en) 2009-10-14
HK1063221A1 (en) 2004-12-17
TWI269949B (en) 2007-01-01
KR20040031598A (en) 2004-04-13
DE60210973T2 (en) 2007-01-04
JP2004125797A (en) 2004-04-22

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