EP2045672B1 - Device for resetting two time counters - Google Patents

Device for resetting two time counters Download PDF

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Publication number
EP2045672B1
EP2045672B1 EP07117757.0A EP07117757A EP2045672B1 EP 2045672 B1 EP2045672 B1 EP 2045672B1 EP 07117757 A EP07117757 A EP 07117757A EP 2045672 B1 EP2045672 B1 EP 2045672B1
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EP
European Patent Office
Prior art keywords
lever
hammers
pin
zero
reset
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EP07117757.0A
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German (de)
French (fr)
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EP2045672A1 (en
Inventor
Baptist Wyssbrod
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Omega SA
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Omega SA
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Application filed by Omega SA filed Critical Omega SA
Priority to EP07117757.0A priority Critical patent/EP2045672B1/en
Priority to US12/238,678 priority patent/US7871197B2/en
Priority to JP2008256195A priority patent/JP5346195B2/en
Priority to CN2008101659824A priority patent/CN101404070B/en
Publication of EP2045672A1 publication Critical patent/EP2045672A1/en
Priority to HK09108522.1A priority patent/HK1130925A1/en
Application granted granted Critical
Publication of EP2045672B1 publication Critical patent/EP2045672B1/en
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    • 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
    • G04F7/0804—Watches or clocks with stop devices, e.g. chronograph with reset mechanisms
    • G04F7/0814—Watches or clocks with stop devices, e.g. chronograph with reset mechanisms with double hammer, i.e. one hammer acts on two counters

Definitions

  • the balance of forces may be such that the action exerted by the user on the control pusher becomes lower than the reaction of the various mechanical elements operated under the effect of this action.
  • the action of the user becomes inoperative and the meters come to rest in a non-controllable position. Therefore, anything that can contribute to a decrease in the reaction forces opposed by the chronograph mechanism when controlling it must be examined. For this purpose, it is of the greatest interest to seek to reduce the friction forces that oppose the movement of the lever with two hammers.
  • the present invention relates to a timepiece device for simultaneously resetting two time counters, in particular for a chronograph mechanism. according to claim 1.
  • the present invention essentially relates to a new design of an instantaneous reset mechanism comprising a two-hammer lever and that such a mechanism can equally well be used in a chronograph mechanism with two time counters. in any other time counter mechanism comprising two display devices (minute and second for example) to be reset simultaneously using a control lever or reset.

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

Description

La présente invention concerne un dispositif de remise à zéro simultanée de deux compteurs de temps. La présente invention concerne en particulier un dispositif de remise à zéro simultanée de deux compteurs de temps d'un mécanisme de chronographe dont les axes de pivotement sont solidaires de cames de remise à zéro respectives en forme de coeurs. Un tel dispositif comprend notamment un levier à deux marteaux venant frapper contre les coeurs pour les faire tourner et les ramener dans une position angulaire correspondant au zéro des compteurs.The present invention relates to a device for simultaneously resetting two time counters. The present invention relates in particular to a simultaneous resetting device of two time counters of a chronograph mechanism whose pivot axes are integral with respective resetting cams in the form of cores. Such a device comprises in particular a lever with two hammers striking against the cores to rotate them back to an angular position corresponding to the zero counters.

Pour effectuer la remise à zéro d'un compteur tel qu'un compteur de chronographe, on associe une came de remise à zéro en forme de coeur à l'axe du compteur. Une telle came est associée à un marteau qui présente une face de frappe telle que lorsqu'elle vient en appui sur les épaulements symétriques de la came, elle permet au marteau d'immobiliser le coeur dans une position angulaire correspondant au zéro du compteur. Si, en raison du fonctionnement du mécanisme de chronographe, la came en forme de coeur se trouve écartée de sa position angulaire correspondant au zéro du compteur et que le marteau vient la frapper, ladite came va tourner sous l'effet de la force du marteau et revenir dans sa position angulaire correspondant au zéro du compteur. Dans cette position, la face de frappe du marteau est en appui sur les deux épaulements de la came en forme de coeur et immobilise celle-ci.To reset a counter such as a chronograph counter, a heart-shaped reset cam is associated with the counter axis. Such a cam is associated with a hammer which has a striking face such that when it bears on the symmetrical shoulders of the cam, it allows the hammer to immobilize the heart in an angular position corresponding to the zero of the counter. If, because of the operation of the chronograph mechanism, the heart-shaped cam is spaced apart from its angular position corresponding to the zero of the counter and the hammer strikes it, said cam will rotate under the effect of the force of the hammer and return to its angular position corresponding to the zero of the counter. In this position, the striking face of the hammer is supported on the two shoulders of the heart-shaped cam and immobilizes it.

Pour effectuer la remise à zéro simultanée de deux compteurs, on utilise un levier à deux marteaux. Compte tenu des différentes tolérances, un tel dispositif ne permet pas en pratique d'obtenir un appui simultané des deux faces de frappe des marteaux sur les épaulements respectifs des deux coeurs en position de remise à zéro des deux compteurs, de sorte que la position zéro de l'un des deux compteurs n'est pas définie avec précision.To perform the simultaneous reset of two counters, a lever with two hammers is used. Given the different tolerances, such a device does not allow in practice to obtain simultaneous support of the two striking faces of the hammers on the respective shoulders of the two hearts in the reset position of the two counters, so that the zero position of one of the two counters is not precisely defined.

Pour tenir compte de ces problèmes de tolérances, il a été prévu de laisser au levier à deux marteaux un léger degré de liberté en pivotement lorsqu'il arrive en bout de course. On comprendra en effet qu'en autorisant le levier à pivoter légèrement lorsque les faces de frappe de ses marteaux sont en appui sur les épaulements respectifs des deux coeurs, cela autorise le marteau à s'accommoder d'un léger décalage desdits coeurs et de ramener ceux-ci dans leur position angulaire correspondant au zéro des compteurs. Néanmoins, lorsque le levier pivote, cela génère des forces de frottement qui viennent s'ajouter aux forces résistantes opposées par les différents éléments du mécanisme de chronographe qui sont mis en action par pression de l'utilisateur sur le poussoir de commande. Ainsi, le bilan des forces peut être tel que l'action exercée par l'utilisateur sur le poussoir de commande devienne inférieure à la réaction des différents éléments mécaniques mis en marche sous l'effet de cette action. Il résulte d'une telle situation que l'action de l'utilisateur devient inopérante et que les compteurs s'immobilisent dans une position non contrôlable. Par conséquent, tout ce qui peut contribuer à une diminution des forces de réaction opposées par le mécanisme de chronographe lorsqu'on commande celui-ci doit être examiné. A cet effet, il est du plus grand intérêt de chercher à réduire les forces de frottement qui s'opposent au déplacement du levier à deux marteaux.To take account of these problems of tolerance, it has been planned to leave the lever with two hammers a slight degree of freedom in pivoting when it reaches the end of the race. It will be understood that by allowing the lever to pivot slightly when the striking faces of his hammers are supported on the respective shoulders of the two hearts, it allows the hammer to accommodate a slight shift of said hearts and bring back these in their angular position corresponding to the zero of the counters. Nevertheless, when the lever pivots, it generates friction forces which are added to the resistant forces opposed by the various elements of the chronograph mechanism which are actuated by pressure of the user on the control pushbutton. Thus, the balance of forces may be such that the action exerted by the user on the control pusher becomes lower than the reaction of the various mechanical elements operated under the effect of this action. As a result of such a situation, the action of the user becomes inoperative and the meters come to rest in a non-controllable position. Therefore, anything that can contribute to a decrease in the reaction forces opposed by the chronograph mechanism when controlling it must be examined. For this purpose, it is of the greatest interest to seek to reduce the friction forces that oppose the movement of the lever with two hammers.

Le document de brevet CH 5607/66 concerne un mécanisme de chronographe. Ce mécanisme comprend notamment un levier de remise à zéro comportant deux marteaux coopérant avec les coeurs d'un mobile des secondes et d'un compteur des minutes. Le levier de remise à zéro comporte également une languette qui vient de fabrication avec ce levier et qui est repliée pour passer à travers une ouverture de la platine du mouvement. La languette prend appui et frotte contre les bords de l'ouverture.The patent document CH 5607/66 relates to a chronograph mechanism. This mechanism comprises in particular a reset lever comprising two hammers cooperating with the hearts of a mobile seconds and a minute counter. The reset lever also includes a tongue that has been manufactured with this lever and which is folded to pass through an opening of the platen of the movement. The tongue is supported and rubs against the edges of the opening.

Le document de brevet US 3,927,519 concerne un mouvement d'horlogerie appelé généralement compteur. Ce mécanisme comprend en particulier un marteau coopérant avec deux coeurs. Ce marteau est lié à la platine par une articulation coulissante constituée par une fente allongée et rectiligne et par un plot cylindrique fixé à la platine par une vis. Le plot est engagé dans la fente de façon à guider le marteau sans jeu.The patent document US 3,927,519 relates to a watch movement generally called counter. This mechanism comprises in particular a hammer cooperating with two hearts. This hammer is connected to the plate by a sliding joint consisting of an elongated and rectilinear slot and a cylindrical stud fixed to the plate by a screw. The stud is engaged in the slot so as to guide the hammer without play.

La présente invention a pour but de répondre à l'objectif de réduire les forces de frottement qui s'opposent au déplacement du levier à deux marteaux ainsi qu'à d'autres encore en procurant un dispositif de remise à zéro de deux compteurs de temps dans lequel les forces de frottement sont réduites.The present invention aims to meet the objective of reducing the friction forces that oppose the movement of the two-hammer lever as well as others by providing a device for resetting two time counters wherein the frictional forces are reduced.

A cet effet, la présente invention concerne un dispositif pour pièce d'horlogerie de remise à zéro simultanée de deux compteurs de temps notamment pour un mécanisme de chronographe selon la revendication 1.For this purpose, the present invention relates to a timepiece device for simultaneously resetting two time counters, in particular for a chronograph mechanism. according to claim 1.

Grâce à ces caractéristiques, la présente invention procure un dispositif de remise à zéro simultanée de deux compteurs de temps dans lequel le levier à deux marteaux chargé de ramener les compteurs à zéro en agissant sur les cames correspondantes oppose une moindre résistance au déplacement grâce au fait que, si sa goupille de guidage est forcée contre les rebords de l'ouverture de forme dans laquelle elle se déplace, ladite goupille va rouler via sa bague contre ces rebords et opposera donc une force de frottement moindre. Ceci s'avère particulièrement avantageux en phase de centrage, lorsque la goupille arrive au fond de l'ouverture de forme où elle présente un léger degré de liberté en pivotement pour permettre au levier à deux marteaux de s'accommoder d'un léger décalage des coeurs et de ramener ceux-ci dans leur position angulaire correspondant au zéro des compteurs. En effet, s'il n'y a pas égalité entre les moments définis comme étant le produit entre la force exercée par les marteaux sur les coeurs respectifs au niveau du point de contact entre un marteau et le coeur correspondant et la longueur de la normale à la ligne d'action de ladite force menée à partir de la goupille (bras de levier), il apparaît des contraintes qui s'exercent perpendiculairement aux rebords du trou de forme dans lequel se déplace la goupille. Par conséquent, la présence de la bague qui roule contre les rebords de l'ouverture de forme lorsque la goupille se déplace à l'intérieur de celle-ci permet de limiter les forces de frottement.Thanks to these features, the present invention provides a device for simultaneous resetting of two time counters in which the lever with two hammers responsible for bringing the counters to zero by acting on the corresponding cams opposes a lower resistance to displacement thanks to the fact that, if its guide pin is forced against the edges of the shaped opening in which it moves, said pin will roll via its ring against these flanges and therefore oppose a lower friction force. This is particularly advantageous in the centering phase, when the pin reaches the bottom of the opening shape where it has a slight degree of freedom in pivoting to allow the lever with two hammers to accommodate a slight shift of hearts and bring them back to their angular position corresponding to the zero of the counters. Indeed, if there is no equality between the moments defined as being the product between the force exerted by the hammers on the respective hearts at the point of contact between a hammer and the corresponding core and the length of the normal at the line of action of said force conducted from the pin (lever arm), there appear constraints that are exerted perpendicularly to the edges of the hole in which the pin moves. Therefore, the presence of the ring which rolls against the edges of the shape opening when the pin moves within it limits the friction forces.

Selon une caractéristique complémentaire de l'invention, le levier à deux marteaux est guidé par deux goupilles qui sont solidaires de ce levier et qui se déplacent chacune dans une ouverture de forme pratiquée dans le pont, l'une de ces goupilles permettant le couplage en pivotement entre ledit levier à deux marteaux et un levier de commande sur lequel l'utilisateur peut agir pour ramener les cames dans une position angulaire correspondant au zéro des compteurs.According to a complementary feature of the invention, the two-hammer lever is guided by two pins which are integral with this lever and which each move in an opening of shape made in the bridge, one of these pins allowing coupling in pivoting between said two-hammer lever and a control lever on which the user can act to return the cams to an angular position corresponding to the zero of the counters.

Selon une autre caractéristique de l'invention, la goupille par laquelle le levier à deux marteaux est articulé au levier de commande porte une bague, tandis que l'autre goupille porte deux bagues superposées dont celle de dessous joue le rôle de cale d'épaisseur pour compenser l'épaisseur du levier de commande.According to another characteristic of the invention, the pin by which the lever with two hammers is articulated to the control lever carries a ring, while the other pin carries two superposed rings, the one below plays the role of thick shim to compensate for the thickness of the control lever.

Selon encore une autre caractéristique de l'invention, la bague est une pièce métallique décolletée ou une pierre.According to yet another characteristic of the invention, the ring is a metal part décolletée or a stone.

Selon encore une autre caractéristique de l'invention, la pierre est un rubis.According to yet another characteristic of the invention, the stone is a ruby.

D'autres caractéristiques et avantages de la présente invention ressortiront plus clairement de la description détaillée qui suit d'un mode de réalisation du dispositif de remise à zéro instantanée selon l'invention, cet exemple étant donné à titre purement illustratif et non limitatif seulement en liaison avec le dessin annexé sur lequel :

  • la figure 1 est une vue en perspective du levier à deux marteaux et du levier de commande du dispositif de remise à zéro instantanée selon l'invention ;
  • la figure 2 est une vue en plan du levier à deux marteaux et du levier de commande de la figure 1 avec représentation des cames dont la position angulaire illustrée correspond au zéro des compteurs ;
  • la figure 3 est une vue à plus grande échelle de la zone entourée d'un cercle sur la figure 2, et
  • la figure 4 est une vue en coupe selon la ligne IV-IV du dispositif de remise à zéro instantanée selon l'invention représenté à la figure 2.
Other features and advantages of the present invention will emerge more clearly from the detailed description which follows of an embodiment of the instantaneous reset device according to the invention, this example being given purely by way of illustration and not limiting only in connection with the appended drawing in which:
  • the figure 1 is a perspective view of the two-hammer lever and the control lever of the instantaneous reset device according to the invention;
  • the figure 2 is a plan view of the two hammer lever and the control lever of the figure 1 with representation of the cams whose illustrated angular position corresponds to the zero of the counters;
  • the figure 3 is a larger-scale view of the area surrounded by a circle on the figure 2 , and
  • the figure 4 is a sectional view along line IV-IV of the instantaneous reset device according to the invention shown in FIG. figure 2 .

La présente invention procède de l'idée générale inventive qui consiste à réduire les forces de frottement qui s'exercent sur le levier à double marteaux d'un mécanisme de remise à zéro instantanée d'un dispositif d'affichage à deux compteurs de temps dans le double but de limiter les forces de réaction exercées par le mécanisme sous l'effet de son actionnement à une valeur inférieure à la valeur de l'action exercée par l'utilisateur pour mettre ce mécanisme en marche, et de s'assurer que la force exercée par les faces de frappe des marteaux sur les coeurs est bien perpendiculaire aux épaulements des cames ou, tout du moins, s'inscrit dans un secteur angulaire limité garantissant l'immobilisation des cames dans une position angulaire déterminée correspondant au zéro des compteurs.The present invention proceeds from the general inventive idea of reducing the frictional forces on the double-hammer lever of an instantaneous reset mechanism of a dual-time display in the dual purpose of limiting the reaction forces exerted by the mechanism under the effect of its actuation to a value lower than the value of the action exerted by the user to put this mechanism into operation, and to ensure that the The force exerted by the striking faces of the hammers on the cores is perpendicular to the shoulders of the cams or, at least, fits in a limited angular sector ensuring the immobilization of the cams in a given angular position corresponding to the zero of the counters.

On comprendra que la présente invention se rapporte essentiellement à une nouvelle conception d'un mécanisme de remise à zéro instantanée comprenant un levier à deux marteaux et qu'un tel mécanisme peut tout aussi bien être utilisé dans un mécanisme de chronographe à deux compteurs de temps que dans n'importe quel autre mécanisme compteur de temps comprenant deux dispositifs d'affichage (minute et seconde par exemple) devant être remis à zéro simultanément à l'aide d'un levier de commande ou de remise à zéro.It will be understood that the present invention essentially relates to a new design of an instantaneous reset mechanism comprising a two-hammer lever and that such a mechanism can equally well be used in a chronograph mechanism with two time counters. in any other time counter mechanism comprising two display devices (minute and second for example) to be reset simultaneously using a control lever or reset.

On comprendra également que, bien que décrite en liaison avec un levier à deux marteaux, la présente invention peut tout aussi bien s'appliquer à un mécanisme comprenant un levier à un marteau ou à trois marteaux.It will also be understood that, although described in connection with a two-hammer lever, the present invention can equally well be applied to a mechanism comprising a lever with a hammer or with three hammers.

Désigné dans son ensemble par la référence numérique générale 1, le mécanisme de remise à zéro instantanée selon l'invention est représenté partiellement et en perspective à la figure 1 annexée à la présente demande de brevet. Ce mécanisme 1 comprend essentiellement un levier de remise à zéro 2 et un levier 4 comprenant deux marteaux 6 et 8. Ces marteaux 6 et 8 présentent chacun une face de frappe inclinée 6a et 8a par laquelle ils commandent l'immobilisation dans une position angulaire déterminée de deux cames 6b et 8b (voir figure 2) correspondant au zéro de deux compteurs de temps dont l'un, désigné par la référence numérique 7, est visible à la figure 4.Designated as a whole by the general numerical reference 1, the instantaneous reset mechanism according to the invention is represented partially and in perspective at the figure 1 annexed to this patent application. This mechanism 1 essentially comprises a reset lever 2 and a lever 4 comprising two hammers 6 and 8. These hammers 6 and 8 each have an inclined striking face 6a and 8a by which they control the immobilization in a given angular position two cams 6b and 8b (see figure 2 ) corresponding to the zero of two time counters, one of which, denoted by the reference numeral 7, is visible at the figure 4 .

Comme on peut le voir à l'examen de la figure 1, le levier 4 à deux marteaux 6 et 8 présente deux goupilles 10 et 12 qui sont solidaires de ce levier 4, par exemple par chassage et rivetage. On constatera que la goupille 10 est notamment utilisée pour l'articulation à pivotement entre le levier 4 à deux marteaux 6, 8 et le levier de remise à zéro 2. A cet effet, le levier de remise à zéro 2 présente un trou oblong 14 dans lequel la goupille 10 peut coulisser. On remarquera également qu'une bague 16a est montée libre sur la goupille 10 tandis que deux bagues superposées 16b et 16c sont montées libres sur la goupille 12. La bague 16c joue le rôle de cale d'épaisseur pour compenser l'épaisseur du levier de remise à zéro 2. Bien entendu, les cales 16b et 16c pourraient être réalisées d'une pièce. Les cales 16a-16c peuvent être des pièces métalliques décolletées ou bien des pierres. Dans ce dernier cas, elles peuvent être réalisées en rubis.As can be seen from the examination of the figure 1 , the lever 4 with two hammers 6 and 8 has two pins 10 and 12 which are integral with the lever 4, for example by driving and riveting. It will be noted that the pin 10 is used in particular for the articulation pivoting between the lever 4 with two hammers 6, 8 and the reset lever 2. To this end, the reset lever 2 has an oblong hole 14 in which the pin 10 is slidable. It will also be noted that a ring 16a is freely mounted on the pin 10 while two superposed rings 16b and 16c are mounted free on the pin 12. The ring 16c acts as a shim to compensate for the thickness of the lever. reset 2. Of course, the wedges 16b and 16c could be made in one piece. The shims 16a-16c can be metal parts décolletées or stones. In the latter case, they can be made in rubies.

Dans la situation représentée à la figure 2, le levier 4 est dans une position où les deux marteaux 6 et 8 immobilisent les cames 6b et 8b dans une position angulaire correspondant au zéro des compteurs de temps. Plus précisément, les faces de frappe 6a et 8a des marteaux 6, 8 sont en appui sur les épaulements respectifs 6c et 8c des cames 6b et 8b.In the situation represented in figure 2 , the lever 4 is in a position where the two hammers 6 and 8 immobilize the cams 6b and 8b in an angular position corresponding to the zero of the time counters. More specifically, the striking faces 6a and 8a of the hammers 6, 8 are supported on the respective shoulders 6c and 8c of the cams 6b and 8b.

Le levier 4 à deux marteaux 6, 8 est amené dans la position illustrée à la figure 2 par pression de l'utilisateur sur un poussoir (non représenté) dans la direction de la flèche F. Cette pression est transmise au levier de remise à zéro 2 par le biais d'une bascule 18 à l'encontre de la force de rappel d'un ressort 20. Sous l'effet de cette pression, le levier de remise à zéro 2 pivote autour de son axe 22 dans le sens des aiguilles d'une montre et provoque la translation du levier 4 à deux marteaux 6, 8 jusque dans la position représentée à la figure 2.The lever 4 with two hammers 6, 8 is brought into the position illustrated in FIG. figure 2 by pressure of the user on a pusher (not shown) in the direction of the arrow F. This pressure is transmitted to the reset lever 2 by means of a rocker 18 against the restoring force d 20. As a result of this pressure, the reset lever zero 2 rotates about its axis 22 in the direction of clockwise and causes the translation of the lever 4 to two hammers 6, 8 to the position shown in the figure 2 .

On remarque que le levier 4 à deux marteaux 6, 8 est guidé en translation par le biais de ses deux goupilles 10, 12 aptes à se déplacer dans deux trous de forme correspondants 24 et 26 pratiqués dans un pont ou platine 28 du mouvement (voir figure 4). Il y a donc interposition des bagues 16a et 16b entre les goupilles 10 et 12 et les rebords des trous de forme 24 et 26 lorsque ces goupilles 10, 12 se déplacent dans les trous 24, 26. Comme les bagues 16a, 16b sont libres de tourner autour des goupilles 10, 12, les forces de frottement entre lesdites goupilles 10, 12 et les rebords des trous de forme 24, 26 sont significativement amoindries. Cela permet d'éviter que la réaction produite par le mécanisme de remise à zéro sous l'effet de son actionnement ne soit supérieure à l'action exercée par l'utilisateur pour actionner ce mécanisme de remise à zéro. Si cette condition n'était pas remplie, l'action de l'utilisateur deviendrait inopérante et les compteurs s'immobiliseraient dans une position non contrôlable.Note that the lever 4 with two hammers 6, 8 is guided in translation through its two pins 10, 12 adapted to move in two corresponding shaped holes 24 and 26 formed in a bridge or platen 28 of the movement (see figure 4 ). There is therefore interposition of the rings 16a and 16b between the pins 10 and 12 and the edges of the shaped holes 24 and 26 when these pins 10, 12 move in the holes 24, 26. As the rings 16a, 16b are free to rotating around the pins 10, 12, the frictional forces between said pins 10, 12 and the edges of the shaped holes 24, 26 are significantly reduced. This makes it possible to avoid that the reaction produced by the reset mechanism under the effect of its actuation is greater than the action exerted by the user to actuate this reset mechanism. If this condition was not fulfilled, the user action would become inoperative and the meters would come to a halt in an uncontrollable position.

Le fait de prévoir des bagues 16a, 16b mobiles en rotation sur les goupilles 10, 12 qui servent au guidage en translation du levier 4 à double marteaux 6, 8 présente également un grand intérêt lorsque la goupille 12 arrive au fond de son trou de forme 26. En effet, comme il peut être vu à la figure 3, le trou de forme 26 présente vers son extrémité où se trouve la goupille 12 lorsque le levier 4 à double marteaux 6, 8 se retrouve dans la position dans laquelle il immobilise les cames 6b, 8b un diamètre D légèrement supérieur au diamètre d de ladite goupille 12, ce qui autorise le levier 4 à deux marteaux 6, 8 à pivoter légèrement lorsqu'il arrive en bout de course et à s'accommoder d'un léger décalage des cames 6b, 8b en ramenant celles-ci dans leur position angulaire correspondant au zéro des compteurs. Néanmoins, lors de ce réajustement, il apparaît des forces perpendiculairement aux rebords des trous de forme 24, 26, forces qui, en l'absence des bagues 16a, 16b, engendreraient d'importantes forces de friction qui, d'une part, pourraient rendre inopérante l'action de l'utilisateur sur le mécanisme de remise à zéro pour le mettre en marche et qui, d'autre part, empêcherait de garantir que la force exercée par les faces de frappe 6a, 8a sur les épaulements respectifs 6c et 8c des cames 6b et 8b soit bien perpendiculaire par rapport à ces épaulements 6c et 8c ou tout du moins ne sorte pas d'un secteur angulaire αlimité de l'ordre de ± 15° par rapport à la normale auxdits épaulements 6c, 8c levée depuis le point de contact entre ces épaulements 6c, 8c et les faces de frappe 6a, 8a.The fact of providing rings 16a, 16b rotatable on the pins 10, 12 which serve to guide in translation the lever 4 double hammers 6, 8 is also of great interest when the pin 12 reaches the bottom of its shape hole 26. Indeed, as it can be seen at figure 3 , the shaped hole 26 has towards its end where the pin 12 is located when the lever 4 with double hammers 6, 8 is in the position in which it immobilizes the cams 6b, 8b a diameter D slightly greater than the diameter d of said pin 12, which allows the lever 4 with two hammers 6, 8 to pivot slightly when it reaches the end of the race and to accommodate a slight shift of the cams 6b, 8b by bringing them into their angular position corresponding to the zero of the counters. Nevertheless, during this readjustment, forces appear perpendicular to the edges of the shaped holes 24, 26, forces which, in the absence of the rings 16a, 16b, would generate significant forces of friction which, on the one hand, could render ineffective the action of the user on the reset mechanism to turn it on and which, on the other hand, would prevent to guarantee that the force exerted by the striking faces 6a, 8a on the respective shoulders 6c and 8c of the cams 6b and 8b is perpendicular with respect to these shoulders 6c and 8c or at least does not go out of an angular sector αlimit of the order of ± 15 ° with respect to normal to said shoulders 6c, 8c raised from the point of contact between these shoulders 6c, 8c and the striking faces 6a, 8a.

Il va de soi que la présente invention n'est pas limitée aux modes de réalisation qui viennent d'être décrits et que diverses modifications et variantes simples peuvent être envisagées par l'homme du métier sans sortir du cadre de l'invention tel que défini par les revendications annexées.It goes without saying that the present invention is not limited to the embodiments which have just been described and that various modifications and simple variants can be envisaged by those skilled in the art without departing from the scope of the invention as defined by the appended claims.

Claims (5)

  1. Timepiece device for simultaneously resetting to zero two time counters particularly for a chronograph mechanism each of said two time counters being pivoted about an arbour secured to a cam (6b, 8b), the simultaneous zero reset device (1) including a lever (4) with two hammers (6, 8) which are applied against the respective cams (6b, 8b) when the two time counters are reset to zero, at least one pin (10, 12) being used to guide the lever (4) with two hammers (6, 8) being secured to said lever (4) and moving in a shaped aperture (24, 26) made in a bridge (28), characterized in that a ring (16a; 16b, 16c) is mounted to rotate freely about the pin (10, 12) and is inserted between said pin (10, 12) and the shaped aperture (24, 26) in which said pin moves.
  2. Timepiece device according to claim 1, characterized in that the lever (4) with two hammers (6, 8) is guided by two pins (10, 12), which are secured to said lever (4) and which each move in a shaped aperture (24, 26) made in the bridge (28), one of said pins (10) forming the pivoting coupling between said lever (4) with two hammers (6, 8) and a zero reset lever (2) on which the user may act to return the cams (6b, 8b) to an angular position corresponding to zero on the counters.
  3. Timepiece device according to claim 2, characterized in that the pin (10) via which the lever (4) with two hammers (6, 8) is hinged to the zero reset lever (2) carries a ring (16a), whereas the other pin (12) carries two superposed rings (16b, 16c) the lower one (16c) of which plays the part of a spacer to compensate for the thickness of the zero reset lever (2).
  4. Timepiece device according to any of claims 1 to 3, characterized in that the ring (16a, 16b, 16c) is a machined metal part or a jewel.
  5. Timepiece device according to claim 4, characterized in that the jewel is a ruby.
EP07117757.0A 2007-10-02 2007-10-02 Device for resetting two time counters Active EP2045672B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP07117757.0A EP2045672B1 (en) 2007-10-02 2007-10-02 Device for resetting two time counters
US12/238,678 US7871197B2 (en) 2007-10-02 2008-09-26 Zero reset device for two time counters
JP2008256195A JP5346195B2 (en) 2007-10-02 2008-10-01 Zero reset device for two time counters
CN2008101659824A CN101404070B (en) 2007-10-02 2008-10-06 Device for resetting two time counters
HK09108522.1A HK1130925A1 (en) 2007-10-02 2009-09-17 Zero reset device for two time counters

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07117757.0A EP2045672B1 (en) 2007-10-02 2007-10-02 Device for resetting two time counters

Publications (2)

Publication Number Publication Date
EP2045672A1 EP2045672A1 (en) 2009-04-08
EP2045672B1 true EP2045672B1 (en) 2014-02-26

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EP07117757.0A Active EP2045672B1 (en) 2007-10-02 2007-10-02 Device for resetting two time counters

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US (1) US7871197B2 (en)
EP (1) EP2045672B1 (en)
JP (1) JP5346195B2 (en)
CN (1) CN101404070B (en)
HK (1) HK1130925A1 (en)

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Publication number Priority date Publication date Assignee Title
JP2010261815A (en) * 2009-05-07 2010-11-18 Seiko Instruments Inc Chronograph mechanism and chronograph timepiece including the same
JP5536623B2 (en) * 2010-02-03 2014-07-02 セイコーインスツル株式会社 Chronograph clock
EP2362276B1 (en) * 2010-02-25 2012-10-31 Montres Breguet SA Programmable and reprogrammable mechanical memory wheel for a timepiece
EP2362277B1 (en) * 2010-02-25 2012-10-31 Montres Breguet SA On-demand time zone displayed on the main hand of a timepiece
EP2503407B1 (en) * 2011-03-23 2017-06-28 Montres Breguet SA Timepiece movement comprising an instant actuator controlled by the movement
US9146541B2 (en) * 2011-06-29 2015-09-29 Rolex S.A. Device for resetting to a predetermined position an indicator member indicative of a parameter connected with time
CH708999A1 (en) * 2013-12-16 2015-06-30 Société Anonyme De La Manufacture D Horlogerie Audemars Piguet & Cie Device reset with independent hammers.
DE202017107668U1 (en) * 2017-12-18 2018-01-19 Uwe Heinz Zeroing device for minute hand of a chronograph and chronograph
JP2022529155A (en) * 2019-04-15 2022-06-17 ロレックス・ソシエテ・アノニム Cam type clock parts
EP4372489A1 (en) 2022-11-15 2024-05-22 Damasko Präzisionstechnik GmbH & Co. KG Spring loaded zero reset mechanism

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CH346170A (en) * 1958-04-25 1960-04-30 Roamer Watch Co Sa Calendar timepiece
GB1405101A (en) * 1971-08-20 1975-09-03 Smiths Industries Ltd Reset mechanisms for use in stopwatches
DE2218806C3 (en) 1972-04-18 1975-02-27 Siemens Ag, 1000 Berlin Und 8000 Muenchen Rectifier system for feeding aluminum electrolysis furnaces
CH571741B5 (en) * 1973-04-06 1976-01-15 Valjoux Sa
CH1722673A4 (en) 1973-12-07 1975-11-14
CH670187GA3 (en) * 1987-05-12 1989-05-31
CH690524A5 (en) * 1995-10-31 2000-09-29 Rolex Montres Piece chronograph mechanism watchmaking.
JP3265232B2 (en) * 1997-07-07 2002-03-11 セイコーインスツルメンツ株式会社 Chronograph clock
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
EP1746471B1 (en) * 2005-07-20 2019-09-18 Breitling AG Return-to-zero device for two time counters

Also Published As

Publication number Publication date
JP2009085957A (en) 2009-04-23
CN101404070A (en) 2009-04-08
EP2045672A1 (en) 2009-04-08
CN101404070B (en) 2013-04-17
US7871197B2 (en) 2011-01-18
JP5346195B2 (en) 2013-11-20
HK1130925A1 (en) 2010-01-08
US20090086583A1 (en) 2009-04-02

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