EP1890205A1 - Reset mechanism for a timepiece - Google Patents

Reset mechanism for a timepiece Download PDF

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Publication number
EP1890205A1
EP1890205A1 EP06016979A EP06016979A EP1890205A1 EP 1890205 A1 EP1890205 A1 EP 1890205A1 EP 06016979 A EP06016979 A EP 06016979A EP 06016979 A EP06016979 A EP 06016979A EP 1890205 A1 EP1890205 A1 EP 1890205A1
Authority
EP
European Patent Office
Prior art keywords
control member
reset
hammer
cams
hammers
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.)
Granted
Application number
EP06016979A
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German (de)
French (fr)
Other versions
EP1890205B1 (en
Inventor
Karl-Friedrich Scheufele
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chopard Manufacture SA
Original Assignee
Chopard Manufacture SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chopard Manufacture SA filed Critical Chopard Manufacture SA
Priority to EP06016979A priority Critical patent/EP1890205B1/en
Publication of EP1890205A1 publication Critical patent/EP1890205A1/en
Priority to HK08102997.1A priority patent/HK1108944A1/en
Application granted granted Critical
Publication of EP1890205B1 publication Critical patent/EP1890205B1/en
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Anticipated expiration legal-status Critical

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Classifications

    • 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
    • G04F7/0809—Watches or clocks with stop devices, e.g. chronograph with reset mechanisms with single hammers, i.e. one hammer acts on each counter
    • 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
    • G04F7/0842—Watches or clocks with stop devices, e.g. chronograph with start-stop control mechanisms
    • G04F7/0847—Watches or clocks with stop devices, e.g. chronograph with start-stop control mechanisms with column wheel

Definitions

  • the present invention relates to a reset device for a timepiece, in particular for a chronograph.
  • resetting devices have several disadvantages. They are particularly relatively bulky because the race of the one-piece piece must be large enough to allow the hammers to be out of the way of the cams in the rest position and come to rest on the cams during the reset. In addition, due to manufacturing tolerances, the resetting of minute and / or hour hands generally lacks precision, hammers can not hit the three cams perfectly accurately. Finally, the hammers exert on the cams of resetting of the pressures which can be very strong, which can damage or even break the axes of the needles.
  • the present invention aims to remedy, in part at least, the aforementioned drawbacks.
  • a resetting device for a timepiece as defined in appended claim 1
  • Particular embodiments of the invention are defined in dependent claims 2 to 8, 10 to 12 and 14.
  • FIG. appended represents a resetting device according to a particular embodiment of the invention.
  • a device 1 reset chronograph according to the invention comprises a push button, shown schematically in 2, operable by a user, a lever 3 controlled by the push button 2, a sliding control member 4 controlled by the lever 3, pivoting hammers 5 controlled by the sliding member 4 and 6 heart-shaped reset cams actuated by the hammers 5 respectively.
  • the lever 3 can assume a rest position shown in dashed lines and a reset position shown in solid lines.
  • the lever 3 is subjected to the action of a return spring 7 which opposes the action of the push button 2.
  • the lever 3 comprises, at one of its ends, two pins 8, 9 between which is interposed with a certain clearance one end 10 of the sliding member 4. In the rest position of the lever 3, the pin 9 is in abutment against the end 10 of the sliding member 4.
  • the sliding member 4 comprises oblong openings 11 which cooperate with fixed guide pins 12 to allow the member 4 to slide in translation in the direction of the oblong openings 11 between a rest position shown in dashed lines and a position of reset shown in solid lines.
  • the sliding member 4 is subjected to the action of an all-or-nothing spring 13, called a reset jumper.
  • the end 14 of this reset jumper 13 abuts in a corner 15 defined by the slice of the sliding member 4 when the latter is in the rest position, and bears against an inclined plane 16 of this slice when the sliding member 4 is in its reset position.
  • This jumper 13 could nevertheless, alternatively, be deleted.
  • the reset cams 6 are in the form of a core and are respectively mounted on the needle pins of FIG. chronograph, namely a seconds counter hand, a minute counter hand and an hour counter hand (not shown).
  • the axes or pivots 17 of the hammers 5, such as the pivot 18 of the lever 3 and the pins 12, are mounted on a fixed part of the chronograph, such as the barrel bridge.
  • the pivots 17 of the hammers 5 are thus independent of the sliding member 4, that is to say that they remain fixed in translation when the sliding member 4 is moved in one direction or the other.
  • Each hammer 5 comprises, on one side of its pivot 17, a first arm 18, and on the other side of its pivot 17, second and third arms 19, 20.
  • the first and third arms 18, 20 are rigid.
  • the second arm 19 is elastic.
  • the first arm 18 is articulated by its end to the sliding member 4 by means of a pin 21 driven into said end and which cooperates with a larger hole formed in the sliding member 4.
  • the reverse is of course also possible, namely that the pin 21 could be driven into the sliding member 4 and cooperate with a larger hole formed in the arm 18.
  • This articulation between the first arm 18 and the sliding member 4 allows the sliding member 4 to pivot the hammer 5 around its pivot 17 between a rest position where the hammer 5 is outside the path of the corresponding cam 6 and a reset position where the percussion face of the hammer, referenced 22 is resting on the shoulder 23 of the cam 6.
  • each hammer 5 intended to cooperate with the corresponding cam 6 is defined by the rigid end of the second arm 19. In known manner, this face 22 is inclined with respect to the line passing through the respective pivots. 17, 24 of the hammer 5 and the cam 6 when the hammer 5 and the cam 6 are in their reset position where the face 22 bears on the shoulder 23 of the cam 6.
  • the end 25 of the third arm 20 is free. This end serves as an abutment against which can abut the face 26 of the end of the second arm 19 opposite to the impact face 22 to limit the deflection of the second arm 19, in particular in cases where, during the reset movement of the hammer 5, the impact face 22 comes into contact with the tip 27 of the cam 6.
  • the distance or lever arm d1 between the pivot 17 and the pivot point to the sliding member 4, more precisely between the center of the pivot 17 and the center of the hinge pin 21 is shorter than the distance or lever arm d2 between the pivot 17 and the percussion face 22, more precisely between the center of the pivot 17 and the center of the percussion face 22.
  • the reset device 1 also cooperates with a vertical clutch 30 of the chronograph, clutch which allows, in a manner known per se, the start or the stop of the chronograph under the action of a second push button (not shown) separate from the push button 2.
  • This clutch 30 comprises a column wheel 31 actuable by the second push button, two clamps 32, 33, one of which 32 controls the other 33 and cooperates with the column wheel 31 by a spout 34, and two superimposed said lower wheels 35 and upper 36 separated by a cone (not shown) on which act the clamps 32, 33, the lower wheel 35 being continuously driven by the watch movement of the chronograph, more specifically by the seconds wheel of the watch movement, the upper wheel 36 meshing with a chronograph wheel connected to the counter hands of seconds, minutes and hours.
  • the clamps 32, 33 are subjected to the action of a return spring (not shown) and can occupy an open position, when the spout 34 is in the space between two columns of the wheel 31, and a closed position, when the spout 34 is resting against a column of the wheel 31.
  • a return spring not shown
  • the upper wheel 36 is integral with the lower wheel 35 and thus drives the chronograph hands.
  • the cone is in a high position which disengages the upper wheel 36 from the lower wheel 35 and the chronograph is thus stopped.
  • the clamp 32 having the spout 34 can be controlled not only by the column wheel 31 but also by the lever 3.
  • one end of the lever 3 other than the one carrying the two pins 8, 9 is equipped with a third pin 37 and the clamp 32 has a recess 38 and a spout 39.
  • the pin 37 is placed in the recess 38, close to the wall of the latter, and not does not hinder the possible movements of the clamps 32, 33 controlled by the column wheel 31.
  • the pin 37 cooperates successively with a portion 40 of the wall of the recess 38 and with the spout 39 to close progressively clamps 32, 33, or comes directly cooperate with the spout 39 to maintain the clamps 32, 33 closed, depending on the position of the spout 34 relative to the column wheel 31.
  • the reset by the device according to the invention is carried out as follows.
  • the push button 2 pivots the lever 3 from its rest position (dashed lines) to its reset position (solid lines).
  • the sliding member 4 remains in the rest position because of the clearance existing between the pin 8 and the end 10 of the sliding member 4, while the pin 37 of the lever 3 is slid on the wall portion 40 of the recess 38 of the clamp 32 to gradually close the clamps 32, 33, if they are not already closed by the cooperation of the spout 34 with the column wheel 31, and thus stop the chronograph.
  • the pin 37 is returned to its initial position in the recess 38, which automatically restarts the chronograph or allows its restart via the second push button depending on the position of the spout 34 relative to the wheel with columns 31, and the pin 9 of the lever 3 pushes the end 10 of the sliding member 4 to bring the sliding member 4 and with it the hammers 5 in their rest position.
  • the reset device according to the invention offers great flexibility in the choice of the arrangement of the various elements, including hammers 5, which facilitates its integration into an additional movement or mechanism and reduces overall clutter. More particularly, the size of the resetting device according to the invention can be significantly reduced by acting on the lever arms of the hammers 5, namely, as in the example illustrated, by choosing a smaller lever arm that the lever arm d2. Indeed, in this way, a small stroke of the sliding member 4 is sufficient to obtain a sufficiently large stroke of the percussion face 22 of the hammers 5 so that this face 22 is outside the path of the cams 6 in the rest position hammers 5.
  • the device according to the invention allows a precise restart of said hands after the reset and avoids that the second wheel of the watch movement does not fall back by catching the games gearing under the effect of the friction of the clutch 30 during the reset, recoil that would have the effect of making a jump forward to the chronograph second hand after the reset.
  • the present invention finds particular application in resetting chronograph hands, it is not limited to such an application.
  • the present invention can indeed be applied to any timepiece in which it is desired to reset one or more needles.

Abstract

The device (1) has a sliding control unit (4) movable in translation and actuated by a manual control unit (2) i.e. push button, and hammers (5) actuated by the unit (4) to co-operate with respective resetting cams (6) e.g. second meter hand resetting cams, in the form of core. The hammers are pivoted around pivots (17) independent of the unit (4) and are articulated to the unit (4) for being pivoted around the pivots by a translation movement of the unit (4). Each hammer has an elastic arm (19) whose rigid end defines a percussion surface (22) that co-operates with the corresponding cam. An independent claim is also included for a device for starting, stopping and resetting a chronograph comprising a clutch.

Description

La présente invention concerne un dispositif de remise à zéro pour une pièce d'horlogerie, en particulier pour un chronographe.The present invention relates to a reset device for a timepiece, in particular for a chronograph.

Dans les chronographes conventionnels, la remise à zéro des aiguilles des compteurs de secondes, minutes et heures s'effectue par l'intermédiaire d'un bouton poussoir dont l'actionnement met en mouvement une pièce monobloc comportant des marteaux qui viennent frapper des cames de remise à zéro en forme de coeur montées sur les axes des aiguilles.In conventional chronographs, the hands of the seconds, minutes and hours counters are reset by means of a push button whose actuation sets in motion a one-piece piece comprising hammers that strike cams reset in the form of heart mounted on the axes of the needles.

Ces dispositifs de remise à zéro présentent plusieurs inconvénients. Ils sont notamment relativement encombrants car la course de la pièce monobloc doit être suffisamment grande pour permettre aux marteaux d'être en dehors du chemin des cames en position de repos et de venir s'appuyer sur les cames lors de la remise à zéro. De plus, du fait des tolérances de fabrication, la remise à zéro des aiguilles des minutes et/ou des heures manque généralement de précision, les marteaux ne pouvant pas frapper les trois cames de manière parfaitement exacte. Enfin, les marteaux exercent sur les cames de remise à zéro des pressions qui peuvent être très fortes, ce qui peut endommager voire casser les axes des aiguilles.These resetting devices have several disadvantages. They are particularly relatively bulky because the race of the one-piece piece must be large enough to allow the hammers to be out of the way of the cams in the rest position and come to rest on the cams during the reset. In addition, due to manufacturing tolerances, the resetting of minute and / or hour hands generally lacks precision, hammers can not hit the three cams perfectly accurately. Finally, the hammers exert on the cams of resetting of the pressures which can be very strong, which can damage or even break the axes of the needles.

La présente invention vise à remédier, en partie au moins, aux inconvénients précités.The present invention aims to remedy, in part at least, the aforementioned drawbacks.

A cette fin il est prévu un dispositif de remise à zéro pour une pièce d'horlogerie tel que défini dans la revendication 1 annexée, un dispositif pour le démarrage, l'arrêt et la remise à zéro d'un chronographe tel que défini dans la revendication 9 et un chronographe tel que défini dans la revendication 13. Des modes de réalisation particuliers de l'invention sont définis dans les revendications dépendantes 2 à 8, 10 à 12 et 14.For this purpose there is provided a resetting device for a timepiece as defined in appended claim 1, a device for starting, stopping and resetting a chronograph as defined in FIG. claim 9 and a chronograph as defined in claim 13. Particular embodiments of the invention are defined in dependent claims 2 to 8, 10 to 12 and 14.

D'autres caractéristiques et avantages de la présente invention apparaîtront à la lecture de la description détaillée suivante faite en référence à la figure annexée qui représente un dispositif de remise à zéro selon un mode de réalisation particulier de l'invention.Other features and advantages of the present invention will appear on reading the following detailed description with reference to FIG. appended which represents a resetting device according to a particular embodiment of the invention.

En référence à la figure, un dispositif 1 de remise à zéro pour chronographe selon l'invention comprend un bouton poussoir, représenté schématiquement en 2, actionnable par un utilisateur, un levier 3 commandé par le bouton poussoir 2, un organe de commande coulissant 4 commandé par le levier 3, des marteaux pivotants 5 commandés par l'organe coulissant 4 et des cames de remise à zéro en forme de coeur 6 actionnables par les marteaux 5 respectivement.Referring to the figure, a device 1 reset chronograph according to the invention comprises a push button, shown schematically in 2, operable by a user, a lever 3 controlled by the push button 2, a sliding control member 4 controlled by the lever 3, pivoting hammers 5 controlled by the sliding member 4 and 6 heart-shaped reset cams actuated by the hammers 5 respectively.

En fonction de la position du bouton poussoir 2, le levier 3 peut prendre une position de repos montrée en traits pointillés et une position de remise à zéro montrée en traits pleins. Le levier 3 est soumis à l'action d'un ressort de rappel 7 qui s'oppose à l'action du bouton poussoir 2. Le levier 3 comprend, à l'une de ses extrémités, deux goupilles 8, 9 entre lesquelles est interposée avec un certain jeu une extrémité 10 de l'organe coulissant 4. En position de repos du levier 3, la goupille 9 est en butée contre l'extrémité 10 de l'organe coulissant 4.Depending on the position of the pushbutton 2, the lever 3 can assume a rest position shown in dashed lines and a reset position shown in solid lines. The lever 3 is subjected to the action of a return spring 7 which opposes the action of the push button 2. The lever 3 comprises, at one of its ends, two pins 8, 9 between which is interposed with a certain clearance one end 10 of the sliding member 4. In the rest position of the lever 3, the pin 9 is in abutment against the end 10 of the sliding member 4.

L'organe coulissant 4 comporte des ouvertures oblongues 11 qui coopèrent avec des goupilles de guidage fixes 12 pour permettre à l'organe 4 de coulisser en translation dans la direction des ouvertures oblongues 11 entre une position de repos montrée en traits pointillés et une position de remise à zéro montrée en traits pleins. L'organe coulissant 4 est soumis à l'action d'un ressort tout ou rien 13, dit sautoir de remise à zéro. L'extrémité 14 de ce sautoir de remise à zéro 13 est en butée dans un coin 15 défini par la tranche de l'organe coulissant 4 lorsque ce dernier est en position de repos, et s'appuie contre un plan incliné 16 de cette tranche lorsque l'organe coulissant 4 est dans sa position de remise à zéro. Ce sautoir 13 pourrait néanmoins, en variante, être supprimé.The sliding member 4 comprises oblong openings 11 which cooperate with fixed guide pins 12 to allow the member 4 to slide in translation in the direction of the oblong openings 11 between a rest position shown in dashed lines and a position of reset shown in solid lines. The sliding member 4 is subjected to the action of an all-or-nothing spring 13, called a reset jumper. The end 14 of this reset jumper 13 abuts in a corner 15 defined by the slice of the sliding member 4 when the latter is in the rest position, and bears against an inclined plane 16 of this slice when the sliding member 4 is in its reset position. This jumper 13 could nevertheless, alternatively, be deleted.

De manière conventionnelle, les cames de remise à zéro 6 présentent la forme d'un coeur et sont montées respectivement sur les axes d'aiguilles de chronographe, à savoir d'une aiguille de compteur de secondes, d'une aiguille de compteur de minutes et d'une aiguille de compteur d'heures (non représentées).Conventionally, the reset cams 6 are in the form of a core and are respectively mounted on the needle pins of FIG. chronograph, namely a seconds counter hand, a minute counter hand and an hour counter hand (not shown).

Les axes ou pivots 17 des marteaux 5, comme le pivot 18 du levier 3 et les goupilles 12, sont montés sur une pièce fixe du chronographe, telle que le pont de barillet. Les pivots 17 des marteaux 5 sont ainsi indépendants de l'organe coulissant 4, c'est-à-dire qu'ils restent fixes en translation lorsque l'organe coulissant 4 est déplacé dans un sens ou dans l'autre. Chaque marteau 5 comporte, d'un côté de son pivot 17, un premier bras 18, et de l'autre côté de son pivot 17, des second et troisième bras 19, 20. Les premier et troisième bras 18, 20 sont rigides. Le second bras 19 est, lui, élastique.The axes or pivots 17 of the hammers 5, such as the pivot 18 of the lever 3 and the pins 12, are mounted on a fixed part of the chronograph, such as the barrel bridge. The pivots 17 of the hammers 5 are thus independent of the sliding member 4, that is to say that they remain fixed in translation when the sliding member 4 is moved in one direction or the other. Each hammer 5 comprises, on one side of its pivot 17, a first arm 18, and on the other side of its pivot 17, second and third arms 19, 20. The first and third arms 18, 20 are rigid. The second arm 19 is elastic.

Le premier bras 18 est articulé par son extrémité à l'organe coulissant 4 au moyen d'une goupille 21 chassée dans ladite extrémité et qui coopère avec un trou de plus grande taille formé dans l'organe coulissant 4. L'inverse est bien entendu également possible, à savoir que la goupille 21 pourrait être chassée dans l'organe coulissant 4 et coopérer avec un trou de plus grande taille formé dans le bras 18. Cette articulation entre le premier bras 18 et l'organe coulissant 4 permet à l'organe coulissant 4 de faire pivoter le marteau 5 autour de son pivot 17 entre une position de repos où le marteau 5 est en dehors du chemin de la came 6 correspondante et une position de remise à zéro où la face de percussion du marteau, référencée 22, est en appui sur l'épaule 23 de la came 6.The first arm 18 is articulated by its end to the sliding member 4 by means of a pin 21 driven into said end and which cooperates with a larger hole formed in the sliding member 4. The reverse is of course also possible, namely that the pin 21 could be driven into the sliding member 4 and cooperate with a larger hole formed in the arm 18. This articulation between the first arm 18 and the sliding member 4 allows the sliding member 4 to pivot the hammer 5 around its pivot 17 between a rest position where the hammer 5 is outside the path of the corresponding cam 6 and a reset position where the percussion face of the hammer, referenced 22 is resting on the shoulder 23 of the cam 6.

La face de percussion 22 de chaque marteau 5 destinée à coopérer avec la came 6 correspondante est définie par l'extrémité, rigide, du second bras 19. De manière connue, cette face 22 est inclinée par rapport à la ligne passant par les pivots respectifs 17, 24 du marteau 5 et de la came 6 lorsque le marteau 5 et la came 6 sont dans leur position de remise à zéro où la face 22 est en appui sur l'épaule 23 de la came 6.The percussion face 22 of each hammer 5 intended to cooperate with the corresponding cam 6 is defined by the rigid end of the second arm 19. In known manner, this face 22 is inclined with respect to the line passing through the respective pivots. 17, 24 of the hammer 5 and the cam 6 when the hammer 5 and the cam 6 are in their reset position where the face 22 bears on the shoulder 23 of the cam 6.

L'extrémité 25 du troisième bras 20 est libre. Cette extrémité sert de butée contre laquelle peut venir s'appuyer la face 26 de l'extrémité du second bras 19 opposée à la face de percussion 22 pour limiter le fléchissement du second bras 19, en particulier dans les cas où, lors du mouvement de remise à zéro du marteau 5, la face de percussion 22 arrive au contact de la pointe 27 de la came 6.The end 25 of the third arm 20 is free. This end serves as an abutment against which can abut the face 26 of the end of the second arm 19 opposite to the impact face 22 to limit the deflection of the second arm 19, in particular in cases where, during the reset movement of the hammer 5, the impact face 22 comes into contact with the tip 27 of the cam 6.

De préférence, pour chaque marteau 5, la distance ou bras de levier d1 entre le pivot 17 et le point d'articulation à l'organe coulissant 4, plus précisément entre le centre du pivot 17 et le centre de la goupille d'articulation 21, est plus courte que la distance ou bras de levier d2 entre le pivot 17 et la face de percussion 22, plus précisément entre le centre du pivot 17 et le centre de la face de percussion 22.Preferably, for each hammer 5, the distance or lever arm d1 between the pivot 17 and the pivot point to the sliding member 4, more precisely between the center of the pivot 17 and the center of the hinge pin 21 , is shorter than the distance or lever arm d2 between the pivot 17 and the percussion face 22, more precisely between the center of the pivot 17 and the center of the percussion face 22.

Le dispositif de remise à zéro 1 selon l'invention coopère par ailleurs avec un embrayage vertical 30 du chronographe, embrayage qui permet, d'une manière connue en soi, le départ ou l'arrêt du chronographe sous l'action d'un second bouton poussoir (non représenté) distinct du bouton poussoir 2. Cet embrayage 30 comprend une roue à colonnes 31 actionnable par le second bouton poussoir, deux pinces 32, 33 dont l'une 32 commande l'autre 33 et coopère avec la roue à colonnes 31 par un bec 34, et deux roues superposées dites inférieure 35 et supérieure 36 séparées par un cône (non représenté) sur lequel agissent les pinces 32, 33, la roue inférieure 35 étant continuellement entraînée par le mouvement horloger du chronographe, plus précisément par la roue de secondes du mouvement horloger, la roue supérieure 36 engrenant avec une roue de chronographe reliée aux aiguilles de compteur de secondes, minutes et heures. Les pinces 32, 33 sont soumises à l'action d'un ressort de rappel (non représenté) et peuvent occuper une position ouverte, lorsque le bec 34 est dans l'espace entre deux colonnes de la roue 31, et une position fermée, lorsque le bec 34 est en appui contre une colonne de la roue 31. Dans la position ouverte des pinces 32, 33, la roue supérieure 36 est solidaire de la roue inférieure 35 et entraîne donc les aiguilles de chronographe. Dans la position fermée des pinces 32, 33, le cône est dans une position haute qui désolidarise la roue supérieure 36 de la roue inférieure 35 et le chronographe est donc arrêté.The reset device 1 according to the invention also cooperates with a vertical clutch 30 of the chronograph, clutch which allows, in a manner known per se, the start or the stop of the chronograph under the action of a second push button (not shown) separate from the push button 2. This clutch 30 comprises a column wheel 31 actuable by the second push button, two clamps 32, 33, one of which 32 controls the other 33 and cooperates with the column wheel 31 by a spout 34, and two superimposed said lower wheels 35 and upper 36 separated by a cone (not shown) on which act the clamps 32, 33, the lower wheel 35 being continuously driven by the watch movement of the chronograph, more specifically by the seconds wheel of the watch movement, the upper wheel 36 meshing with a chronograph wheel connected to the counter hands of seconds, minutes and hours. The clamps 32, 33 are subjected to the action of a return spring (not shown) and can occupy an open position, when the spout 34 is in the space between two columns of the wheel 31, and a closed position, when the spout 34 is resting against a column of the wheel 31. In the open position of the clamps 32, 33, the upper wheel 36 is integral with the lower wheel 35 and thus drives the chronograph hands. In the closed position of the clamps 32, 33, the cone is in a high position which disengages the upper wheel 36 from the lower wheel 35 and the chronograph is thus stopped.

Dans la présente invention, la pince 32 comportant le bec 34 peut être commandée non seulement par la roue à colonne 31 mais également par le levier 3. A cet effet, une extrémité du levier 3 autre que celle portant les deux goupilles 8, 9 est munie d'une troisième goupille 37 et la pince 32 comporte un évidement 38 et un bec 39. En position de repos du levier 3, la goupille 37 est placée dans l'évidement 38, à proximité de la paroi de ce dernier, et ne gêne pas les éventuels mouvements des pinces 32, 33 commandés par la roue à colonnes 31. Lorsque le bouton poussoir 2 est actionné, la goupille 37 coopère successivement avec une portion 40 de la paroi de l'évidement 38 et avec le bec 39 pour fermer progressivement les pinces 32, 33, ou vient directement coopérer avec le bec 39 pour maintenir les pinces 32, 33 fermées, en fonction de la position du bec 34 par rapport à la roue à colonnes 31.In the present invention, the clamp 32 having the spout 34 can be controlled not only by the column wheel 31 but also by the lever 3. For this purpose, one end of the lever 3 other than the one carrying the two pins 8, 9 is equipped with a third pin 37 and the clamp 32 has a recess 38 and a spout 39. In the rest position of the lever 3, the pin 37 is placed in the recess 38, close to the wall of the latter, and not does not hinder the possible movements of the clamps 32, 33 controlled by the column wheel 31. When the push button 2 is actuated, the pin 37 cooperates successively with a portion 40 of the wall of the recess 38 and with the spout 39 to close progressively clamps 32, 33, or comes directly cooperate with the spout 39 to maintain the clamps 32, 33 closed, depending on the position of the spout 34 relative to the column wheel 31.

La remise à zéro par le dispositif selon l'invention s'effectue de la manière suivante. Lorsque l'utilisateur presse le bouton poussoir 2, ce dernier fait pivoter le levier 3 de sa position de repos (traits pointillés) à sa position de remise à zéro (traits pleins). Pendant une première partie de la course du levier 3, l'organe coulissant 4 reste en position de repos du fait du jeu existant entre la goupille 8 et l'extrémité 10 de l'organe coulissant 4, tandis que la goupille 37 du levier 3 vient glisser sur la portion de paroi 40 de l'évidement 38 de la pince 32 pour fermer progressivement les pinces 32, 33, si elles ne sont pas déjà fermées par la coopération du bec 34 avec la roue à colonnes 31, et ainsi arrêter le chronographe. A partir du moment où la goupille 8 entre en contact avec l'extrémité 10 de l'organe coulissant 4 commence une seconde partie de la course du levier 3 où la goupille 8 pousse l'organe coulissant 4 dans un sens qui fait pivoter les marteaux 5 vers les cames 6 depuis leur position de repos, montrée en traits pointillés. Toutefois, cette seconde partie de la course du levier 3 ne s'effectue qu'à partir d'une certaine force exercée sur le bouton poussoir 2 suffisante pour vaincre l'action du sautoir de remise à zéro 13, Une fois que l'action de ce sautoir 13 est vaincue, les marteaux 5 viennent frapper les cames 6 d'une manière franche et les font tourner jusqu'à ce que la face de percussion 22 des marteaux 5 soit en appui contre l'épaule 23 des cames 6, comme représenté en traits pleins. Dans le même temps, la goupille 37 maintient les pinces 32, 33 fermées en continuant son glissement sur la paroi de l'évidement 38 jusqu'à arriver au bec 39. Dans la position finale où la face de percussion 22 des marteaux 5 est en appui contre l'épaule 23 des cames 6 et la goupille 37 est en appui contre le bec 39, les aiguilles de chronographe sont à zéro. Lorsque le bouton poussoir 2 est relâché, le levier 3 est ramené par son ressort de rappel 7 dans sa position de repos. Pendant ce mouvement, la goupille 37 se replace dans sa position initiale dans l'évidement 38, ce qui redémarre automatiquement le chronographe ou autorise son redémarrage par l'intermédiaire du second bouton poussoir en fonction de la position du bec 34 par rapport à la roue à colonnes 31, et la goupille 9 du levier 3 pousse l'extrémité 10 de l'organe coulissant 4 pour ramener l'organe coulissant 4 et avec lui les marteaux 5 dans leur position de repos.The reset by the device according to the invention is carried out as follows. When the user presses the push button 2, the latter pivots the lever 3 from its rest position (dashed lines) to its reset position (solid lines). During a first part of the travel of the lever 3, the sliding member 4 remains in the rest position because of the clearance existing between the pin 8 and the end 10 of the sliding member 4, while the pin 37 of the lever 3 is slid on the wall portion 40 of the recess 38 of the clamp 32 to gradually close the clamps 32, 33, if they are not already closed by the cooperation of the spout 34 with the column wheel 31, and thus stop the chronograph. From the moment the pin 8 comes into contact with the end 10 of the sliding member 4 begins a second portion of the stroke of the lever 3 where the pin 8 pushes the sliding member 4 in a direction that rotates the hammers 5 to the cams 6 from their rest position, shown in dotted lines. However, this second part of the stroke of the lever 3 is only effected from a certain force exerted on the push button 2 sufficient to overcome the action of the jumper of reset 13, Once the action this jumper 13 is defeated, the hammers 5 come to hit the cams 6 in a straightforward manner and rotate them until the percussion face 22 of the hammers 5 bears against the shoulder 23 of the cams 6, as shown in solid lines. At the same time, the pin 37 holds the clamps 32, 33 closed while continuing its sliding on the wall of the recess 38 until it reaches the spout 39. In the final position where the hammer impact face 22 of the hammers 5 is in position. support against the shoulder 23 of the cams 6 and the pin 37 bears against the spout 39, the chronograph hands are at zero. When the push button 2 is released, the lever 3 is returned by its return spring 7 in its rest position. During this movement, the pin 37 is returned to its initial position in the recess 38, which automatically restarts the chronograph or allows its restart via the second push button depending on the position of the spout 34 relative to the wheel with columns 31, and the pin 9 of the lever 3 pushes the end 10 of the sliding member 4 to bring the sliding member 4 and with it the hammers 5 in their rest position.

On notera que grâce à son organe de commande coulissant 4 qui fait pivoter les marteaux 5 autour de leurs pivots 17, le dispositif de remise à zéro selon l'invention offre une grande souplesse dans le choix de la disposition des différents éléments, notamment des marteaux 5, ce qui facilite son intégration dans un mouvement ou un mécanisme additionnel et permet de réduire l'encombrement global. Plus particulièrement, l'encombrement du dispositif de remise à zéro selon l'invention peut être significativement réduit en jouant sur les bras de levier des marteaux 5, à savoir, comme dans l'exemple illustré, en choisissant un bras de levier d1 plus petit que le bras de levier d2. En effet, de la sorte, une petite course de l'organe coulissant 4 suffit à obtenir une course suffisamment grande de la face de percussion 22 des marteaux 5 pour que cette face 22 soit en dehors du chemin des cames 6 dans la position de repos des marteaux 5.Note that with its sliding control member 4 which pivots the hammers 5 around their pivots 17, the reset device according to the invention offers great flexibility in the choice of the arrangement of the various elements, including hammers 5, which facilitates its integration into an additional movement or mechanism and reduces overall clutter. More particularly, the size of the resetting device according to the invention can be significantly reduced by acting on the lever arms of the hammers 5, namely, as in the example illustrated, by choosing a smaller lever arm that the lever arm d2. Indeed, in this way, a small stroke of the sliding member 4 is sufficient to obtain a sufficiently large stroke of the percussion face 22 of the hammers 5 so that this face 22 is outside the path of the cams 6 in the rest position hammers 5.

Par ailleurs, les inexactitudes de fabrication sont compensées par l'élasticité des bras 19 des marteaux 5, élasticité qui permet aux trois aiguilles d'être remises à zéro avec précision. Cette élasticité des bras 19 diminue par ailleurs les contraintes que subissent les pivots 24 des aiguilles lors de la remise à zéro.In addition, manufacturing inaccuracies are compensated by the elasticity of the arms 19 of the hammers 5, an elasticity that allows the three needles to be reset to zero with precision. This elasticity of the arms 19 also reduces the stresses experienced by the pins 24 of the needles during the reset.

Enfin, en arrêtant le mouvement des aiguilles de chronographe avant de les remettre à zéro, le dispositif selon l'invention permet un redémarrage précis desdites aiguilles après la remise à zéro et évite que la roue de seconde du mouvement horloger ne recule en rattrapant les jeux d'engrenage sous l'effet de la friction de l'embrayage 30 pendant la remise à zéro, recul qui aurait pour effet de faire effectuer un saut en avant à l'aiguille de seconde de chronographe après la remise à zéro.Finally, by stopping the movement of the chronograph hands before resetting them, the device according to the invention allows a precise restart of said hands after the reset and avoids that the second wheel of the watch movement does not fall back by catching the games gearing under the effect of the friction of the clutch 30 during the reset, recoil that would have the effect of making a jump forward to the chronograph second hand after the reset.

Bien que la présente invention trouve une application particulière dans la remise à zéro des aiguilles d'un chronographe, elle n'est pas limitée à une telle application. La présente invention peut en effet s'appliquer à toute pièce d'horlogerie dans laquelle on souhaite pouvoir remettre à zéro une ou plusieurs aiguilles.Although the present invention finds particular application in resetting chronograph hands, it is not limited to such an application. The present invention can indeed be applied to any timepiece in which it is desired to reset one or more needles.

Claims (14)

Dispositif de remise à zéro pour une pièce d'horlogerie, comprenant un organe de commande manuel (2), un second organe de commande (4) pouvant être actionné par l'organe de commande manuel (2), une ou plusieurs cames de remise à zéro (6) et un ou plusieurs marteaux (5) pouvant être actionnés par le second organe de commande (4) pour coopérer avec la ou les cames de remise à zéro (6) respectivement, caractérisé en ce que le second organe de commande (4) est mobile en translation et en ce que le ou les marteaux (5) sont pivotants autour d'un ou de pivots respectifs (17) indépendants du second organe de commande (4) et sont articulés au second organe de commande (4) pour pouvoir être pivotés autour du ou desdits pivots (17) par un mouvement de translation du second organe de commande (4).Reset device for a timepiece, comprising a manual control member (2), a second control member (4) operable by the manual control member (2), one or more delivery cams at zero (6) and one or more hammers (5) operable by the second control member (4) to cooperate with the one or more reset cams (6) respectively, characterized in that the second control member (4) is movable in translation and in that the hammer or hammers (5) are pivotable about one or respective pivots (17) independent of the second control member (4) and are articulated to the second control member (4). ) in order to be pivotable about the said pivot or pivots (17) by a translational movement of the second control member (4). Dispositif de remise à zéro selon la revendication 1, caractérisé en ce qu'il comprend plusieurs cames de remise à zéro (6) et plusieurs marteaux respectifs (5).Resetting device according to claim 1, characterized in that it comprises a plurality of reset cams (6) and a plurality of respective hammers (5). Dispositif de remise à zéro selon la revendication 1 ou 2, caractérisé en ce que la ou les cames (6) sont en forme de coeur.Reset device according to claim 1 or 2, characterized in that the cam or cams (6) are in the form of a core. Dispositif de remise à zéro selon l'une quelconque des revendications 1 à 3, caractérisé en ce que l'organe de commande manuel (2) est un bouton poussoir.Reset device according to any one of claims 1 to 3, characterized in that the manual control member (2) is a push button. Dispositif de remise à zéro selon l'une quelconque des revendications 1 à 4, caractérisé en ce que pour le ou chaque marteau (5), la distance (d1) entre le point (21) d'articulation au second organe de commande (4) et le pivot (17) est plus courte que la distance (d2) entre la face (22) destinée à coopérer avec la came (6) correspondante et le pivot (17).Reset device according to any one of claims 1 to 4, characterized in that for the or each hammer (5), the distance (d1) between the hinge point (21) and the second control member (4) ) and the pivot (17) is shorter than the distance (d2) between the face (22) intended to cooperate with the corresponding cam (6) and the pivot (17). Dispositif de remise à zéro selon l'une quelconque des revendications 1 à 5, caractérisé en ce que le ou chaque marteau (5) comprend un bras élastique (19) dont une extrémité définit la face (22) du marteau (5) destinée à coopérer avec la came (6) correspondante.Reset device according to any one of claims 1 to 5, characterized in that the or each hammer (5) comprises an elastic arm (19) whose one end defines the face (22) of the hammer (5) intended to cooperate with the corresponding cam (6). Dispositif de remise à zéro selon la revendication 6, caractérisé en ce que le ou chaque marteau (5) comprend un autre bras (20), rigide, contre l'extrémité (25) duquel peut s'appuyer ladite extrémité (22, 26) du bras élastique (19) pour limiter la déformation du bras élastique (19) lorsque le marteau (5) coopère avec la came (6) correspondante.Resetting device according to claim 6, characterized in that the or each hammer (5) comprises another arm (20), rigid, against the end (25) which can bear said end (22, 26). elastic arm (19) to limit the deformation of the elastic arm (19) when the hammer (5) cooperates with the corresponding cam (6). Dispositif de remise à zéro selon l'une quelconque des revendications 1 à 7, caractérisé en ce qu'il comprend en outre un organe de commande (3) intermédiaire entre l'organe de commande manuel (2) et le second organe de commande (4).Reset device according to any one of claims 1 to 7, characterized in that it further comprises a control member (3) intermediate between the manual control member (2) and the second control member ( 4). Dispositif pour le démarrage, l'arrêt et la remise à zéro d'un chronographe, comprenant un embrayage (30) et un dispositif de remise à zéro (1) selon la revendication 8, l'organe de commande intermédiaire (3) du dispositif de remise à zéro (1) étant agencé pour, sur une première partie de sa course, commander l'embrayage (30) de manière à arrêter le chronographe, et sur une seconde partie de sa course succédant à la première partie, commander un déplacement en translation du second organe de commande (4) pour actionner le ou les marteaux (5).Device for starting, stopping and resetting a chronograph, comprising a clutch (30) and a reset device (1) according to claim 8, the intermediate control member (3) of the device resetting (1) being arranged for, on a first part of its travel, to control the clutch (30) so as to stop the chronograph, and on a second part of its race succeeding the first part, to control a displacement in translation of the second control member (4) for actuating the hammer or hammers (5). Dispositif selon la revendication 9, caractérisé en ce que l'embrayage (30) est un embrayage vertical comportant des pinces (32, 33) et en ce que l'organe de commande intermédiaire (3) est agencé pour, sur la première partie de sa course, commander la fermeture des pinces (32, 33).Device according to claim 9, characterized in that the clutch (30) is a vertical clutch comprising tongs (32, 33) and in that the intermediate control member (3) is arranged for, on the first part of its course, order the closure of the tongs (32, 33). Dispositif selon la revendication 10, caractérisé en ce que l'organe de commande intermédiaire (3) comprend, à une première extrémité, des première et seconde goupilles (8, 9) entre lesquelles est interposée avec un jeu une extrémité (10) du second organe de commande (4), et à une seconde extrémité, une troisième goupille (37) coopérant avec l'une (32) des pinces (32, 33) qui commande l'autre (33).Device according to claim 10, characterized in that the intermediate control member (3) comprises, at a first end, first and second pins (8, 9) between which is interposed with a play an end (10) of the second control member (4), and at a second end, a third pin (37) cooperating with one (32) of the clamps (32, 33) which controls the other (33). Dispositif selon l'une quelconque des revendications 8 à 11, caractérisé en ce que l'organe de commande intermédiaire (3) est un levier.Device according to any one of claims 8 to 11, characterized in that the intermediate control member (3) is a lever. Chronographe comprenant un dispositif selon l'une quelconque des revendications 1 à 12.Chronograph comprising a device according to any one of claims 1 to 12. Chronographe selon la revendication 13, caractérisé en ce que la ou les cames de remise à zéro (6) comprennent des cames de remise à zéro d'une aiguille de compteur de secondes, d'une aiguille de compteur de minutes et d'une aiguille de compteur d'heures.Chronograph according to claim 13, characterized in that the one or more reset cams (6) comprise reset cams of a second counter hand, a minute counter hand and a needle hour counter.
EP06016979A 2006-08-15 2006-08-15 Reset mechanism for a timepiece Active EP1890205B1 (en)

Priority Applications (2)

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EP06016979A EP1890205B1 (en) 2006-08-15 2006-08-15 Reset mechanism for a timepiece
HK08102997.1A HK1108944A1 (en) 2006-08-15 2008-03-14 Reset mechanism for a timepiece

Applications Claiming Priority (1)

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EP06016979A EP1890205B1 (en) 2006-08-15 2006-08-15 Reset mechanism for a timepiece

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2884350A2 (en) 2013-12-16 2015-06-17 Société anonyme de la Manufacture d'Horlogerie Audemars Piguet & Cie Zero-reset device with intependent hammers
CN113359405A (en) * 2020-03-05 2021-09-07 蒙特雷布勒盖股份有限公司 Timer reset system
EP4180880A1 (en) * 2021-11-10 2023-05-17 Montres Breguet S.A. Device for displaying a succession of indications of a temporal quantity for a timepiece

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Publication number Priority date Publication date Assignee Title
CH249420A (en) * 1944-08-15 1947-06-30 Ebauches Sa Minute counter.
CH538716A (en) * 1970-11-24 1973-08-15 Dubois & Depraz Sa Clutch mechanism for timepiece
EP1494097A1 (en) * 2003-01-28 2005-01-05 Seiko Epson Corporation Multi-function watch

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH249420A (en) * 1944-08-15 1947-06-30 Ebauches Sa Minute counter.
CH538716A (en) * 1970-11-24 1973-08-15 Dubois & Depraz Sa Clutch mechanism for timepiece
EP1494097A1 (en) * 2003-01-28 2005-01-05 Seiko Epson Corporation Multi-function watch

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2884350A2 (en) 2013-12-16 2015-06-17 Société anonyme de la Manufacture d'Horlogerie Audemars Piguet & Cie Zero-reset device with intependent hammers
EP2884350A3 (en) * 2013-12-16 2016-05-25 Société anonyme de la Manufacture d'Horlogerie Audemars Piguet & Cie Zero-reset device with intependent hammers
CN113359405A (en) * 2020-03-05 2021-09-07 蒙特雷布勒盖股份有限公司 Timer reset system
EP3876043A1 (en) * 2020-03-05 2021-09-08 Montres Breguet S.A. System for zero resetting of a chronograph
EP3876042A1 (en) * 2020-03-05 2021-09-08 Montres Breguet S.A. System for resetting a chronograph
JP2021139889A (en) * 2020-03-05 2021-09-16 モントレー ブレゲ・エス アー Chronograph reset system
JP7066889B2 (en) 2020-03-05 2022-05-13 モントレー ブレゲ・エス アー Chronograph reset system
US11687043B2 (en) 2020-03-05 2023-06-27 Montres Breguet S.A. Chronograph reset system
EP4180880A1 (en) * 2021-11-10 2023-05-17 Montres Breguet S.A. Device for displaying a succession of indications of a temporal quantity for a timepiece
EP4180881A1 (en) * 2021-11-10 2023-05-17 Montres Breguet S.A. Device for displaying a sequence of temporal values for a timepiece

Also Published As

Publication number Publication date
EP1890205B1 (en) 2011-11-30
HK1108944A1 (en) 2008-05-23

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