EP1711865A1 - Power reserve indicator mechanism - Google Patents

Power reserve indicator mechanism

Info

Publication number
EP1711865A1
EP1711865A1 EP05702190A EP05702190A EP1711865A1 EP 1711865 A1 EP1711865 A1 EP 1711865A1 EP 05702190 A EP05702190 A EP 05702190A EP 05702190 A EP05702190 A EP 05702190A EP 1711865 A1 EP1711865 A1 EP 1711865A1
Authority
EP
European Patent Office
Prior art keywords
indicator
mainspring
lever
mobile
spring
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.)
Withdrawn
Application number
EP05702190A
Other languages
German (de)
French (fr)
Inventor
Sébastien Jeanneret
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.)
Vaucher Manufacture Fleurier SA
Original Assignee
Vaucher Manufacture Fleurier 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 Vaucher Manufacture Fleurier SA filed Critical Vaucher Manufacture Fleurier SA
Priority to EP05702190A priority Critical patent/EP1711865A1/en
Publication of EP1711865A1 publication Critical patent/EP1711865A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B9/00—Supervision of the state of winding, e.g. indicating the amount of winding
    • 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
    • G04B9/00—Supervision of the state of winding, e.g. indicating the amount of winding
    • G04B9/005—Supervision of the state of winding, e.g. indicating the amount of winding by optical indication of the amount of winding

Definitions

  • the present invention relates to the field of watchmaking. It relates, more particularly, to the power reserve indicator mechanisms for movement of a timepiece of the type provided with an energy source formed by a mainspring.
  • the mechanism according to the invention comprises a frame, a power reserve indicator and a differential gear with a first input connected to a mobile driven in rotation during the winding of the mainspring and a second input connected to a mobile driven in rotation during disarming of the mainspring, and an output connected to the power reserve indicator.
  • the indicator is capable of traversing a given angle comprised between two extreme positions, the first of which is occupied when the mainspring is armed and the second, when the spring is disarmed.
  • a mechanism of this type is described in "The Swiss watch with automatic winding" by B. Humbert, Scriptar editions, Lausanne 1955, on page 85. It is provided with an indicator mounted on friction on a mobile connected to the differential output. The two extreme positions between which the indicator moves are defined by stops. When the indicator arrives at one of the stops, from the upper limit of winding or disarming the mainspring, it remains stationary while the mainspring continues to be armed or disarmed, friction allowing movement cog while the indicator is fixed.
  • patent application EP 1 139 182 filed in the name of the applicant describes a mechanism comprising an intermediate mobile interposed between the output of the differential gear and the power reserve indicator.
  • This mobile comprises an elastic element arranged so that the differential gear continues to rotate freely while the indicator remains in abutment, causing the elastic element to be armed.
  • this arrangement can be used when the indicator is in abutment in one or the other of its extreme positions.
  • the present invention aims to overcome the drawback mentioned above, while retaining the advantages presented by the mechanism of the EP application already mentioned.
  • the invention relates to a power reserve indicator mechanism for the movement of a timepiece of the type comprising a frame, an energy source formed by a barrel and a housed motor spring. in the barrel, a gear train driven by the barrel and winding means of the mainspring.
  • This mechanism includes: - a power reserve indicator with a mobile and a display device carried by the mobile, - a differential gear kinematically connected by a first input to the barrel, by a second input to the winding means and by a output to the indicator, and - an intermediate mobile comprising first and second parts respectively kinematically connected to the output and to the mobile of the indicator and a connecting member connecting these parts, arranged so that the indicator occupies a position between two extreme positions, the first reached when the winding of the spring is stronger than an upper limit value, and the second when the spring winding is weaker than a lower limit value, the first and second parts rotating jointly as long as the spring armature is between its extreme values.
  • the connecting member comprises a friction mechanism arranged so that the first part can move frictionally with reference to the second when the indicator has reached its first extreme position, and a elastic element arranged so as to be able to be armed when the indicator has reached its second extreme position, by the displacement of the first part with reference to the second part.
  • the friction mechanism comprises a stop integral with one of the parts and a lever mounted friction on the other part, arranged and dimensioned so that: - when the indicator occupies its first extreme position and as the winding of the mainspring continues, the lever is held against the stop and rotates frictionally on the part of which it is integral, so that the indicator remains stationary, and - as soon as the mainspring disarms, the indicator leaves its first extreme position, the first and second parts of the intermediate mobile rotating together.
  • the lever has a longitudinal slot widening into an opening engaged on the pinion.
  • the elastic element is integral with the part comprising the stop and cooperates with the lever so that, when the indicator occupies its second extreme position, it is immobilized, while the motor spring drives the train of finishing and the differential gear, and that the elastic element is armed, then disarmed during the winding of the mainspring.
  • the mechanism also has the following characteristics: - the elastic element is formed by an elastic blade fixed by a first of its ends to the wheel, while its second, free end, is arranged so that it presses the lever against the first end, - the intermediate mobile comprises a wheel formed of a board whose periphery is provided with a toothing, a pinion formed by a sleeve provided at one of its ends with a toothing , a spacer arranged on the sleeve, the lever being clipped onto the sleeve to hold said wheel which is mounted to rotate freely on the spacer, and - the motor spring is of the sliding flange type.
  • FIG. 1 is a sectional view of a date indicator mechanism according to the invention
  • FIG. 2 and 3 are views from above and in section of the intermediate mobile
  • - Figure 4 is a diagram showing the variation of the torque as a function of the winding angle of the mainspring.
  • the mechanism according to the invention is intended to take place in a watch movement. It is mounted on a plate 8 partially visible in the drawing.
  • the movement includes an energy source formed by a barrel 10, which can rotate around a shaft 12 pivoting on the plate 8 and in which is housed a motor spring 14 provided with a sliding flange, not explicitly shown in the drawing.
  • the shaft 12 carries a ratchet wheel 16 which, driven in rotation by means of a winding crown, not shown, enables the motor spring 14 to be cocked.
  • the barrel 10 causes the gear train which is also not shown in the drawing.
  • the mechanism further includes a differential 18 described in detail in the aforementioned EP application.
  • a differential 18 described in detail in the aforementioned EP application.
  • it comprises a shaft 20 placed at its outlet, a planet carrier 22 integral in rotation with the shaft 20 and carrying a satellite 24 with conical teeth.
  • a first and a second input consist respectively of a first 26 and a second 28 wheels freely mounted on the planet carrier 22.
  • the wheels 26 and 28 are each formed by a board identified by the letter a and the periphery of which carries a toothing b, and a pinion c provided with a conical toothing d.
  • the wheel 26 meshes with its teeth 26b with the barrel 10.
  • the wheel 28 meshes with its teeth 28b with a return 30 itself meshing with the ratchet wheel 16.
  • the teeth 26d of the pinion 26c and 28d of the pinion 28c are engaged with the satellite 24.
  • the gear ratios between the barrel 10 and the first input wheel 26, on the one hand, and the ratchet wheel 16 and the second input wheel 28, on the other hand, are equal, from so that, for the same angle traversed by the barrel 10 and the ratchet wheel 16, the wheels 26 and 28 pass through equal angles.
  • the mechanism comprises an intermediate mobile 32, particularly illustrated in Figures 2 and 3, pivotally mounted on the plate 8. It comprises a pinion 34 formed of a sleeve 34a provided at one of its ends d '' a toothing 34b.
  • the sleeve 34a is formed by a cylindrical portion 34c and a conical portion 34d widening from the portion 34c outwards.
  • the mobile 32 further comprises a wheel 36 formed by a board 36a whose periphery is provided with a toothing 36b which meshes with the shaft 20 of the differential 18.
  • a spacer 37 is driven out on the portion 34c of the sleeve 34a .
  • the wheel 36 is mounted to rotate freely on the spacer 37 and can thus rotate on the pinion 34.
  • a lever 38 of rectangular shape and whose length is about 0.75 times that of the diameter of the wheel 36 has a longitudinal slot 41 widening into an opening 42 located approximately two-thirds of its length.
  • the lever 38 thus has, on either side of the opening 42, a large arm 38a and a small arm 38b. It is clipped onto the conical part 34d of the pinion 34 so as to ensure the axial retention of the wheel 36.
  • the pinion 34 and the lever 38 thus form a friction mechanism, the limiting torque of which is defined by the elasticity of the arms 38a and 38b.
  • a spring 40 formed of an elastic blade in an arc of a circle embracing an angle of about 270 ° is fixed, by one of its ends 44 and in known manner, to the board of the wheel 36 Its other free end 46 forms an elbow 46a folded towards the outside of the wheel and arranged so that, at rest, it bears against the large arm 38a, at near the opening 42 and thus keeps the lever in abutment against the end 44 of the blade.
  • Figure 1 also shows that the mechanism includes a movable indicator 48 pivotally mounted on a rod 50 driven in the plate 8. It includes a board 48a provided at its periphery with a toothing 48b engaged with the pinion 34, and a barrel 48c extending beyond the plate 8 and intended to carry a power reserve indicator needle, not shown in the drawing.
  • the board 48a comprises a cutout 48d in the form of an annular sector embracing an angle of approximately 150 ° corresponding to the angle of displacement of the needle.
  • a pin 52, driven into the plate 8 is engaged in the cutout 48d and serves as a stop for the mobile 48, of which a first and a second extreme position are thus defined.
  • the mainspring 14 when disarming, drives in rotation and in a conventional manner the barrel 10 which meshes with the gear train.
  • the mainspring 14 slowly disarms, causing the work in gear. As can be seen in FIG. 4, the torque of the mainspring 14, represented by the curve 58a, decreases until it reaches a limit value 60a.
  • the power reserve indicator then indicates that the latter is exhausted and the mobile indicator is immobilized, the end of the cut 48d being in abutment against the pin 52.
  • the user proceeds to winding the mainspring 14 illustrated by the curve 58b.
  • the spring 40 disarms (curve 62b) then, when the lever 38 returns to its rest position, the torque of the mainspring reaches a certain value at point 60b, the indicator mobile is again driven and the indicator moves opposite of the scale of the dial.
  • the end 44 of the spring 40 drives the lever 38 with a torque lower than the friction torque of the lever on the pinion and therefore drives, with it, the pinion 34.
  • the Power reserve indicator displays the maximum load
  • the mobile indicator is immobilized.
  • the torque of the corresponding motor spring 14 is shown at point 66 of curve 58b.
  • the pinion 34 is then blocked since it meshes with the indicator mobile.
  • the implementation of the various components does not require any particular measure, both in terms of production and after-sales service, the indicator automatically setting in its correct position, thanks to the fact that, during arming, the lever 38 rotates frictionally on the pinion 34, while, during disarming, the setting is maintained, due to the fact that the spring 40 is armed. It is obvious that, to allow these arrangements, the winding torque of the spring 40 must always remain less than the friction torque of the lever 38 on the conical portion 34d.

Abstract

The mechanism has an intermediate movable part (32) with two parts connected by a connection unit. The unit has a friction mechanism arranged such that one part can move with friction with respect to the other part when a power reserve indicator attains its end position and an elastic unit arranged such that it is reinforced when the indicator attains its another end position.

Description

DescriptionDescription
[0001] MÉCANISME INDICATEUR DE RÉSERVE DE MARCHEPOWER RESERVE INDICATOR MECHANISM
[0002] La présente invention se rapporte au domaine de l'horlogerie. Elle concerne, plus particulièrement, les mécanismes indicateurs de réserve de marche pour mouvement de pièce d'horlogerie du type muni d'une source d'énergie formée d'un ressort-moteur. De manière classique, le mécanisme selon l'invention comporte un bâti, un indicateur de réserve de marche et un engrenage différentiel avec une première entrée reliée à un mobile entraîné en rotation lors de l'armage du ressort-moteur et une deuxième entrée reliée à un mobile entraîné en rotation lors du désarmage du ressort-moteur, et une sortie reliée à l'indicateur de réserve de marche. Dans un tel mécanisme, l'indicateur est susceptible de parcourir un angle donné compris entre deux positions extrêmes dont la première est occupée lorsque le ressort-moteur est armé et la seconde, lorsque le ressort est désarmé.The present invention relates to the field of watchmaking. It relates, more particularly, to the power reserve indicator mechanisms for movement of a timepiece of the type provided with an energy source formed by a mainspring. Conventionally, the mechanism according to the invention comprises a frame, a power reserve indicator and a differential gear with a first input connected to a mobile driven in rotation during the winding of the mainspring and a second input connected to a mobile driven in rotation during disarming of the mainspring, and an output connected to the power reserve indicator. In such a mechanism, the indicator is capable of traversing a given angle comprised between two extreme positions, the first of which is occupied when the mainspring is armed and the second, when the spring is disarmed.
[0003] Un mécanisme de ce type est décrit dans "La montre suisse à remontage automatique" de B. Humbert, éditions Scriptar, Lausanne 1955, en page 85. Il est muni d'un indicateur monté à friction sur un mobile relié à la sortie du différentiel. Les deux positions extrêmes entre lesquelles l'indicateur se déplace sont définies par des butées. Lorsque l'indicateur arrive à l'une des butées, de la limite supérieure d'armage ou de désarmage du ressort-moteur, il reste immobile tandis que le ressort- moteur continue à être armé ou à se désarmer, la friction permettant le déplacement du rouage alors que l'indicateur est fixe.A mechanism of this type is described in "The Swiss watch with automatic winding" by B. Humbert, Scriptar editions, Lausanne 1955, on page 85. It is provided with an indicator mounted on friction on a mobile connected to the differential output. The two extreme positions between which the indicator moves are defined by stops. When the indicator arrives at one of the stops, from the upper limit of winding or disarming the mainspring, it remains stationary while the mainspring continues to be armed or disarmed, friction allowing movement cog while the indicator is fixed.
[0004] Une telle solution permet donc d'estimer l'armage réel du ressort-moteur, mais il peut y avoir des différences importantes d'un cycle à l'autre, dû au déplacement relatif de l'indicateur par rapport au rouage.Such a solution therefore allows to estimate the real winding of the mainspring, but there may be significant differences from one cycle to another, due to the relative movement of the indicator relative to the train.
[0005] Pour pallier cet inconvénient, la demande de brevet EP 1 139 182 déposée au nom de la demanderesse décrit un mécanisme comprenant un mobile intermédiaire intercalé entre la sortie de l'engrenage différentiel et l'indicateur de réserve de marche. Ce mobile comporte un élément élastique agencé de manière à ce que l'engrenage différentiel continue à tourner librement alors que l'indicateur reste en butée, entraînant l'armage de l'élément élastique.To overcome this drawback, patent application EP 1 139 182 filed in the name of the applicant describes a mechanism comprising an intermediate mobile interposed between the output of the differential gear and the power reserve indicator. This mobile comprises an elastic element arranged so that the differential gear continues to rotate freely while the indicator remains in abutment, causing the elastic element to be armed.
[0006] Pratiquement, cette disposition est utilisable lorsque l'indicateur est en butée dans l'une ou l'autre de ses positions extrêmes. Mais il est difficile de faire parfaitement coïncider la position d'armage maximum du ressort- moteur avec la position extrême de l'indicateur correspondant à la plus grande réserve de marche. Cela implique des précautions particulières et des mesures précises lors de l'assemblage, notamment lors du service après-vente, pour que l'indicateur affiche une information correcte.In practice, this arrangement can be used when the indicator is in abutment in one or the other of its extreme positions. However, it is difficult to perfectly align the maximum winding position of the mainspring with the extreme position of the indicator corresponding to the greatest power reserve. This implies special precautions and precise measures during assembly, especially during after-sales service, so that the indicator displays correct information.
[0007] La présente invention a pour but de pallier l'inconvénient évoqué ci- dessus, tout en conservant les avantages présentés par le mécanisme de la demande EP déjà citée.The present invention aims to overcome the drawback mentioned above, while retaining the advantages presented by the mechanism of the EP application already mentioned.
[0008] De façon plus précise, l'invention concerne un mécanisme indicateur de réserve de marche pour mouvement de pièce d'horlogerie du type comportant un bâti, une source d'énergie formée d'un barillet et d'un ressort-moteur logé dans le barillet, un rouage de finissage entraîné par le barillet et des moyens d'armage du ressort-moteur. Ce mécanisme comprend : - un indicateur de réserve de marche avec un mobile et un dispositif d'affichage porté par le mobile, - un engrenage différentiel relié cinématiquement par une première entrée au barillet, par une seconde entrée aux moyens d'armage et par une sortie à l'indicateur, et - un mobile intermédiaire comportant des première et deuxième parties respectivement reliées cinématiquement à la sortie et au mobile de l'indicateur et un organe de liaison reliant ces parties, agencé de manière à ce que l'indicateur occupe une position comprise entre deux positions extrêmes, la première atteinte lorsque l'armage du ressort est plus fort qu'une valeur limite supérieure, et la deuxième lorsque l'armage du ressort est plus faible qu'une valeur limite inférieure, les première et deuxième parties tournant conjointement tant que l'armage du ressort est compris entre ses valeurs extrêmes. [0009] Selon l'invention, l'organe de liaison comprend un mécanisme à friction agencé de manière à ce que la première partie puisse se mouvoir à friction en référence à la deuxième lorsque l'indicateur a atteint sa première position extrême, et un élément élastique agencé de manière à pouvoir être armé lorsque l'indicateur a atteint sa seconde position extrême, par le déplacement de la première partie en référence à la deuxième partie.More specifically, the invention relates to a power reserve indicator mechanism for the movement of a timepiece of the type comprising a frame, an energy source formed by a barrel and a housed motor spring. in the barrel, a gear train driven by the barrel and winding means of the mainspring. This mechanism includes: - a power reserve indicator with a mobile and a display device carried by the mobile, - a differential gear kinematically connected by a first input to the barrel, by a second input to the winding means and by a output to the indicator, and - an intermediate mobile comprising first and second parts respectively kinematically connected to the output and to the mobile of the indicator and a connecting member connecting these parts, arranged so that the indicator occupies a position between two extreme positions, the first reached when the winding of the spring is stronger than an upper limit value, and the second when the spring winding is weaker than a lower limit value, the first and second parts rotating jointly as long as the spring armature is between its extreme values. According to the invention, the connecting member comprises a friction mechanism arranged so that the first part can move frictionally with reference to the second when the indicator has reached its first extreme position, and a elastic element arranged so as to be able to be armed when the indicator has reached its second extreme position, by the displacement of the first part with reference to the second part.
[0010] Avantageusement, le mécanisme à friction comporte une butée solidaire de l'une des parties et un levier monté à friction sur l'autre partie, disposé et dimensionné de manière à ce que : - lorsque l'indicateur occupe sa première position extrême et que l'armage du ressort-moteur se poursuit, le levier est maintenu contre la butée et tourne à friction sur la partie dont il est solidaire, de telle sorte que l'indicateur reste immobile, et - dès que le ressort-moteur se désarme, l'indicateur quitte sa première position extrême, les première et deuxième parties du mobile intermédiaire tournant ensemble.Advantageously, the friction mechanism comprises a stop integral with one of the parts and a lever mounted friction on the other part, arranged and dimensioned so that: - when the indicator occupies its first extreme position and as the winding of the mainspring continues, the lever is held against the stop and rotates frictionally on the part of which it is integral, so that the indicator remains stationary, and - as soon as the mainspring disarms, the indicator leaves its first extreme position, the first and second parts of the intermediate mobile rotating together.
[0011] Le levier est doté d'une fente longitudinale s'élargissant en une ouverture engagée sur le pignon.The lever has a longitudinal slot widening into an opening engaged on the pinion.
[0012] L'élément élastique est solidaire de la partie comportant la butée et coopère avec le levier de manière à ce que, lorsque l'indicateur occupe sa deuxième position extrême, il est immobilisé, alors que le ressort-moteur entraîne le rouage de finissage et l'engrenage différentiel, et que l'élément élastique s'arme, puis se désarme lors de l'armage du ressort-moteur.The elastic element is integral with the part comprising the stop and cooperates with the lever so that, when the indicator occupies its second extreme position, it is immobilized, while the motor spring drives the train of finishing and the differential gear, and that the elastic element is armed, then disarmed during the winding of the mainspring.
[0013] Le mécanisme comporte encore les caractéristiques suivantes : - l'élément élastique est formé d'une lame élastique fixée par une première de ses extrémités à la roue, tandis que sa deuxième extrémité, libre, est disposée de manière à ce qu'elle appuie le levier contre la première extrémité, - le mobile intermédiaire comporte une roue formée d'une planche dont la périphérie est munie d'une denture, un pignon formé d'un manchon muni à l'une de ses extrémités d'une denture, une entretoise disposée sur le manchon, le levier étant clipsé sur le manchon pour maintenir ladite roue qui est montée libre en rotation sur l'entretoise, et - le ressort-moteur est de type à bride glissante.The mechanism also has the following characteristics: - the elastic element is formed by an elastic blade fixed by a first of its ends to the wheel, while its second, free end, is arranged so that it presses the lever against the first end, - the intermediate mobile comprises a wheel formed of a board whose periphery is provided with a toothing, a pinion formed by a sleeve provided at one of its ends with a toothing , a spacer arranged on the sleeve, the lever being clipped onto the sleeve to hold said wheel which is mounted to rotate freely on the spacer, and - the motor spring is of the sliding flange type.
[0014] D'autres avantages de la description apparaîtront plus clairement à la lecture de la description qui suit, faite en référence au dessin annexé dans lequel : - la figure 1 est une vue en coupe d'un mécanisme indicateur de quantième selon l'invention, - les figures 2 et 3 sont des vues de dessus et en coupe du mobile intermédiaire, et - la figure 4 est un diagramme montrant la variation du couple en fonction de l'angle d'armage du ressort-moteur.Other advantages of the description will appear more clearly on reading the description which follows, made with reference to the appended drawing in which: - Figure 1 is a sectional view of a date indicator mechanism according to the invention, - Figures 2 and 3 are views from above and in section of the intermediate mobile, and - Figure 4 is a diagram showing the variation of the torque as a function of the winding angle of the mainspring.
[0015] Le mécanisme selon l'invention est destiné à prendre place dans un mouvement de montre. Il est monté sur une platine 8 partiellement visible sur le dessin. Le mouvement comporte une source d'énergie formée d'un barillet 10, mobile en rotation autour d'un arbre 12 pivotant sur la platine 8 et dans lequel est logé un ressort-moteur 14 muni d'une bride glissante, non explicitement représentée au dessin. L'arbre 12 porte une roue à rochet 16 qui, entraînée en rotation au moyen d'une couronne de remontoir non représentée, permet d'armer le ressort-moteur 14.The mechanism according to the invention is intended to take place in a watch movement. It is mounted on a plate 8 partially visible in the drawing. The movement includes an energy source formed by a barrel 10, which can rotate around a shaft 12 pivoting on the plate 8 and in which is housed a motor spring 14 provided with a sliding flange, not explicitly shown in the drawing. The shaft 12 carries a ratchet wheel 16 which, driven in rotation by means of a winding crown, not shown, enables the motor spring 14 to be cocked.
[0016] Le barillet 10 entraîne le rouage de finissage qui n'est pas non plus représenté au dessin.The barrel 10 causes the gear train which is also not shown in the drawing.
[0017] Le mécanisme comporte encore un différentiel 18 décrit en détail dans la demande EP susmentionnée. En résumé, il comprend un arbre 20 placé à sa sortie, un porte-satellite 22 solidaire en rotation de l'arbre 20 et portant un satellite 24 à denture conique. Une première et une deuxième entrées sont respectivement constituées d'une première 26 et d'une deuxième 28 roues montées librement sur le porte-satellite 22.The mechanism further includes a differential 18 described in detail in the aforementioned EP application. In summary, it comprises a shaft 20 placed at its outlet, a planet carrier 22 integral in rotation with the shaft 20 and carrying a satellite 24 with conical teeth. A first and a second input consist respectively of a first 26 and a second 28 wheels freely mounted on the planet carrier 22.
[0018] Les roues 26 et 28 sont formées chacune par une planche identifiée par la lettre a et dont la périphérie porte une denture b, et un pignon c muni d'une denture conique d. La roue 26 engrène, par sa denture 26b, avec le barillet 10. La roue 28 engrène, par sa denture 28b, avec un renvoi 30, engrenant lui-même avec la roue à rochet 16. Enfin, les dentures 26d du pignon 26c et 28d du pignon 28c sont en prise avec le satellite 24.The wheels 26 and 28 are each formed by a board identified by the letter a and the periphery of which carries a toothing b, and a pinion c provided with a conical toothing d. The wheel 26 meshes with its teeth 26b with the barrel 10. The wheel 28 meshes with its teeth 28b with a return 30 itself meshing with the ratchet wheel 16. Finally, the teeth 26d of the pinion 26c and 28d of the pinion 28c are engaged with the satellite 24.
[0019] Les rapports d'engrenages entre le barillet 10 et la première roue d'entrée 26, d'une part, et la roue à rochet 16 et la deuxième roue d'entrée 28, d'autre part, sont égaux, de manière à ce que, pour un même angle parcouru par le barillet 10 et la roue à rochet 16, les roues 26 et 28 parcourent des angles égaux.The gear ratios between the barrel 10 and the first input wheel 26, on the one hand, and the ratchet wheel 16 and the second input wheel 28, on the other hand, are equal, from so that, for the same angle traversed by the barrel 10 and the ratchet wheel 16, the wheels 26 and 28 pass through equal angles.
[0020] En outre, le mécanisme comporte un mobile intermédiaire 32, particulièrement illustré sur les figures 2 et 3, monté pivotant sur la platine 8. Il comporte un pignon 34 formé d'un manchon 34a muni à l'une de ses extrémités d'une denture 34b. Le manchon 34a est formé d'une portion cylindrique 34c et d'une portion conique 34d s'élargissant de la portion 34c vers l'extérieur.In addition, the mechanism comprises an intermediate mobile 32, particularly illustrated in Figures 2 and 3, pivotally mounted on the plate 8. It comprises a pinion 34 formed of a sleeve 34a provided at one of its ends d '' a toothing 34b. The sleeve 34a is formed by a cylindrical portion 34c and a conical portion 34d widening from the portion 34c outwards.
[0021] Le mobile 32 comprend encore une roue 36 formée d'une planche 36a dont la périphérie est munie d'une denture 36b qui engrène avec l'arbre 20 du différentiel 18. Une entretoise 37 est chassée sur la portion 34c du manchon 34a. La roue 36 est montée libre en rotation sur l'entretoise 37 et peut, ainsi, tourner sur le pignon 34.The mobile 32 further comprises a wheel 36 formed by a board 36a whose periphery is provided with a toothing 36b which meshes with the shaft 20 of the differential 18. A spacer 37 is driven out on the portion 34c of the sleeve 34a . The wheel 36 is mounted to rotate freely on the spacer 37 and can thus rotate on the pinion 34.
[0022] Particulièrement à l'invention, un levier 38 de forme rectangulaire et dont la longueur est environ 0,75 fois celle du diamètre de la roue 36, est doté d'une fente longitudinale 41 s'élargissant en une ouverture 42 située approximativement aux deux tiers de sa longueur. Le levier 38 présente ainsi, de part et d'autre de l'ouverture 42, un grand bras 38a et un petit bras 38b. Il est clipsé sur la partie conique 34d du pignon 34 de manière à assurer le maintien axial de la roue 36. Le pignon 34 et le levier 38 forment ainsi un mécanisme à friction, dont le couple limite est défini par l'élasticité des bras 38a et 38b.Particularly to the invention, a lever 38 of rectangular shape and whose length is about 0.75 times that of the diameter of the wheel 36, has a longitudinal slot 41 widening into an opening 42 located approximately two-thirds of its length. The lever 38 thus has, on either side of the opening 42, a large arm 38a and a small arm 38b. It is clipped onto the conical part 34d of the pinion 34 so as to ensure the axial retention of the wheel 36. The pinion 34 and the lever 38 thus form a friction mechanism, the limiting torque of which is defined by the elasticity of the arms 38a and 38b.
[0023] Par ailleurs, un ressort 40 formé d'une lame élastique en arc de cercle embrassant un angle d'environ 270° est fixé, par l'une de ses extrémités 44 et de manière connue, à la planche de la roue 36. Son autre extrémité 46, libre, forme un coude 46a replié vers l'extérieur de la roue et disposé de manière à ce que, au repos, il soit en appui contre le grand bras 38a, à proximité de l'ouverture 42 et maintient ainsi le levier en appui contre l'extrémité 44 de la lame.Furthermore, a spring 40 formed of an elastic blade in an arc of a circle embracing an angle of about 270 ° is fixed, by one of its ends 44 and in known manner, to the board of the wheel 36 Its other free end 46 forms an elbow 46a folded towards the outside of the wheel and arranged so that, at rest, it bears against the large arm 38a, at near the opening 42 and thus keeps the lever in abutment against the end 44 of the blade.
[0024] Enfin, la figure 1 montre aussi que le mécanisme comporte un mobile indicateur 48 monté pivotant sur un tigeron 50 chassé dans la platine 8. Il comprend une planche 48a munie, à sa périphérie, d'une denture 48b en prise avec le pignon 34, et un canon 48c s'étendant au-delà de la platine 8 et destiné à porter une aiguille d'indicateur de réserve de marche, non représentée au dessin.Finally, Figure 1 also shows that the mechanism includes a movable indicator 48 pivotally mounted on a rod 50 driven in the plate 8. It includes a board 48a provided at its periphery with a toothing 48b engaged with the pinion 34, and a barrel 48c extending beyond the plate 8 and intended to carry a power reserve indicator needle, not shown in the drawing.
[0025] La planche 48a comporte une découpe 48d en forme de secteur annulaire embrassant un angle d'environ 150° correspondant à l'angle de déplacement de l'aiguille. Une goupille 52, chassée dans la platine 8 est engagée dans la découpe 48d et sert de butée au mobile 48, dont une première et une deuxième positions extrêmes sont ainsi définies.The board 48a comprises a cutout 48d in the form of an annular sector embracing an angle of approximately 150 ° corresponding to the angle of displacement of the needle. A pin 52, driven into the plate 8 is engaged in the cutout 48d and serves as a stop for the mobile 48, of which a first and a second extreme position are thus defined.
[0026] Dans un mouvement de montre muni du mécanisme qui vient d'être décrit, le ressort-moteur 14, en se désarmant, entraîne en rotation et de manière classique le barillet 10 qui engrène avec le rouage de finissage.In a watch movement provided with the mechanism which has just been described, the mainspring 14, when disarming, drives in rotation and in a conventional manner the barrel 10 which meshes with the gear train.
[0027] La demande EP précitée décrit en détail le fonctionnement du différentiel 18 au cours de l'armage et du désarmage du ressort-moteur 14. Il ne sera donc pas repris ici.The aforementioned EP application describes in detail the operation of the differential 18 during the arming and disarming of the mainspring 14. It will therefore not be repeated here.
[0028] En fonctionnement normal, c'est-à-dire lorsque le ressort-moteur est suffisamment armé pour entraîner correctement le rouage de finissage du mouvement et que le mobile indicateur est compris entre ses deux positions extrêmes, alors le ressort 40 entraîne, par son extrémité 44, le levier 38, lequel est enserré entre les extrémités 44 et 46a du ressort 40.In normal operation, that is to say when the mainspring is sufficiently armed to properly drive the gear train for finishing the movement and the indicator mobile is between its two extreme positions, then the spring 40 drives, by its end 44, the lever 38, which is clamped between the ends 44 and 46a of the spring 40.
[0029] Le ressort-moteur 14 se désarme lentement en entraînant le rouage de finissage. Comme on peut le voir sur la figure 4, le couple du ressort- moteur 14, représenté par la courbe 58a, diminue jusqu'à atteindre une valeur limite 60a.The mainspring 14 slowly disarms, causing the work in gear. As can be seen in FIG. 4, the torque of the mainspring 14, represented by the curve 58a, decreases until it reaches a limit value 60a.
[0030] L'indicateur de réserve de marche indique alors que celle-ci est épuisée et le mobile indicateur est immobilisé, l'extrémité de la découpe 48d étant en appui contre la goupille 52.The power reserve indicator then indicates that the latter is exhausted and the mobile indicator is immobilized, the end of the cut 48d being in abutment against the pin 52.
[0031] A l'instar du mécanisme décrit dans le document EP déjà cité, si l'utilisateur de la montre ne remonte toujours pas le ressort-moteur 14, celui-ci poursuit son désarmage en faisant fonctionner le mouvement de la montre. Le différentiel 18 continue donc à tourner et, avec lui, la roue 36. Comme le pignon 34 engrène avec le mobile indicateur 48, il est bloqué. La roue 36 a donc un mouvement relatif par rapport au pignon 34. Ce mouvement est rendu possible du fait que la roue 36 est reliée au pignon 34 par le ressort 40 qui s'arme. Comme le montre la courbe 62a, le couple engendré par le ressort 40 va croissant du point 64 jusqu'au point 65 où les couples du ressort-moteur 14 et du ressort 40 se compensent, de sorte que la montre s'arrête.Like the mechanism described in the document EP already cited, if the user of the watch still does not wind the mainspring 14, this continues disarming by operating the watch movement. The differential 18 therefore continues to rotate and, with it, the wheel 36. As the pinion 34 meshes with the mobile indicator 48, it is blocked. The wheel 36 therefore has a relative movement relative to the pinion 34. This movement is made possible by the fact that the wheel 36 is connected to the pinion 34 by the spring 40 which arms. As shown in curve 62a, the torque generated by the spring 40 increases from point 64 to point 65 where the torques of the mainspring 14 and the spring 40 compensate each other, so that the watch stops.
[0032] Ensuite, l'utilisateur procède à l'armage du ressort-moteur 14 illustré par la courbe 58b. Le ressort 40 se désarme (courbe 62b) puis, lorsque le levier 38 retrouve sa position de repos, le couple du ressort-moteur atteint une certaine valeur au point 60b, le mobile indicateur est à nouveau entraîné et l'indicateur se déplace en regard de l'échelle du cadran. Durant cette opération d'armage du ressort-moteur, l'extrémité 44 du ressort 40 entraîne le levier 38 avec un couple inférieur au couple de friction du levier sur le pignon et entraîne donc, avec lui, le pignon 34. Puis, lorsque l'indicateur de réserve de marche affiche la charge maximum, le mobile indicateur est immobilisé. Le couple du ressort-moteur 14 correspondant est représenté au point 66 de la courbe 58b. Le pignon 34 est alors bloqué puisqu'il engrène avec le mobile indicateur.Then, the user proceeds to winding the mainspring 14 illustrated by the curve 58b. The spring 40 disarms (curve 62b) then, when the lever 38 returns to its rest position, the torque of the mainspring reaches a certain value at point 60b, the indicator mobile is again driven and the indicator moves opposite of the scale of the dial. During this winding operation of the mainspring, the end 44 of the spring 40 drives the lever 38 with a torque lower than the friction torque of the lever on the pinion and therefore drives, with it, the pinion 34. Then, when the Power reserve indicator displays the maximum load, the mobile indicator is immobilized. The torque of the corresponding motor spring 14 is shown at point 66 of curve 58b. The pinion 34 is then blocked since it meshes with the indicator mobile.
[0033] Si l'utilisateur de la montre continue à armer le ressort-moteur 14, il doit alors vaincre la friction du levier 38 sur le manchon 34a, ce qui est illustré par la portion 68 de la courbe 58b. Le levier 38, en buté sur l'extrémité 44 du ressort 40, pivote donc sur le pignon 34 jusqu'à l'armage maximal du ressort-moteur 14. Grâce au système à bride glissante, le couple de ce dernier est stabilisé au niveau du plateau 70, malgré la poursuite de l'armage. On obtient ainsi un parfait calage des différents éléments du mécanisme de l'indicateur et une correspondance entre les positions extrêmes du levier et de l'indicateur et l'armage maximal du ressort- moteur, sans devoir prendre de mesure particulière lors de la mise en place des constituants de ce mécanisme. [0034] Le cycle suivant de désarmage se déroule comme décrit ci-dessus. Puis, lors du réarmage suivant, grâce au calage réalisé lors du premier cycle, l'utilisateur sait que lorsque l'indicateur atteint sa position extrême, le ressort-moteur est complètement armé.If the user of the watch continues to wind the mainspring 14, he must then overcome the friction of the lever 38 on the sleeve 34a, which is illustrated by the portion 68 of the curve 58b. The lever 38, in abutment on the end 44 of the spring 40, therefore pivots on the pinion 34 until the maximum winding of the mainspring 14. Thanks to the sliding flange system, the torque of the latter is stabilized at the level of the plateau 70, despite the continuation of arming. We thus obtain a perfect setting of the different elements of the indicator mechanism and a correspondence between the extreme positions of the lever and the indicator and the maximum winding of the mainspring, without having to take any particular measure during the setting in place of the constituents of this mechanism. The next disarming cycle takes place as described above. Then, during the next reset, thanks to the setting made during the first cycle, the user knows that when the indicator reaches its extreme position, the mainspring is fully armed.
[0035] Dans le dispositif tel que décrit, la mise en place des différents composants ne nécessite par de mesure particulière, tant au niveau de la production que du service après-vente, l'indicateur se calant automatiquement dans sa position correcte, grâce au fait que, lors de l'armage, le levier 38 tourne à friction sur le pignon 34, alors que, lors du désarmage, le calage est maintenu, du fait que le ressort 40 s'arme. Il est évident que, pour permettre ces dispositions, le couple d'armage du ressort 40 doit toujours rester inférieur au couple de friction du levier 38 sur la portion conique 34d.In the device as described, the implementation of the various components does not require any particular measure, both in terms of production and after-sales service, the indicator automatically setting in its correct position, thanks to the fact that, during arming, the lever 38 rotates frictionally on the pinion 34, while, during disarming, the setting is maintained, due to the fact that the spring 40 is armed. It is obvious that, to allow these arrangements, the winding torque of the spring 40 must always remain less than the friction torque of the lever 38 on the conical portion 34d.
[0036] [0036]

Claims

Revendications claims
1. Mécanisme indicateur de réserve de marche pour mouvement de pièce d'horlogerie du type comportant un bâti, une source d'énergie formée d'un barillet (10) et d'un ressort-moteur (14) logé dans le barillet, un rouage de finissage entraîné par ledit barillet et des moyens d'armage dudit ressort- moteur (14), et comprenant : un indicateur de réserve de marche avec un mobile (48) et un dispositif d'affichage porté par le mobile.un engrenage différentiel (18) relié cinématiquement par une première entrée (26) au barillet (10), par une seconde entrée (28) aux moyens d'armage et par une sortie (20) audit indicateur, et un mobile intermédiaire (32) comportant des première et deuxième parties respectivement reliées cinématiquement à ladite sortie (20) et au mobile (48) dudit indicateur et un organe de liaison reliant lesdites parties, agencé de manière à ce que ledit indicateur occupe une position comprise entre deux positions extrêmes, la première atteinte lorsque l'armage du ressort (14) est plus fort qu'une valeur limite supérieure, et la deuxième lorsque l'armage du ressort (14) est plus faible qu'une valeur limite inférieure, lesdites première et deuxième parties tournant conjointement tant que l'armage du ressort (14) est compris entre ses valeurs extrêmes.caractérisé en ce que ledit organe de liaison comprend un mécanisme à friction agencé de manière à ce que la première partie puisse se mouvoir à friction en référence à la deuxième lorsque l'indicateur a atteint sa première position extrême, et un élément élastique (40) agencé de manière à pouvoir être armé lorsque l'indicateur a atteint sa seconde position extrême, par le déplacement de la première partie en référence à la deuxième partie.1. Power reserve indicator mechanism for movement of a timepiece of the type comprising a frame, an energy source formed by a barrel (10) and a motor spring (14) housed in the barrel, a finishing train driven by said barrel and winding means of said mainspring (14), and comprising: a power reserve indicator with a mobile (48) and a display device carried by the mobile. a differential gear (18) kinematically connected by a first inlet (26) to the barrel (10), by a second inlet (28) to the winding means and by an outlet (20) to said indicator, and an intermediate mobile (32) comprising first and second parts respectively kinematically connected to said outlet (20) and to the mobile (48) of said indicator and a connecting member connecting said parts, arranged so that said indicator occupies a position between two extreme positions, the first being reached when the winding of the spring (14) is stronger than an upper limit value, and the second when the winding of the spring (14) is weaker than a lower limit value, said first and second parts rotating together as long as the reinforcement of the spring (14) is between its extreme values. characterized in that said connecting member comprises a friction mechanism arranged so that the first part can move with friction with reference to the second when the indicator has reached its first extreme position, and an elastic element (40) arranged so that it can be cocked when the indicator has reached its second extreme position, by moving the first part with reference to the second part.
2. Mécanisme selon la revendication 1 , caractérisé en ce que ledit mécanisme de friction comporte une butée (44) solidaire de l'une desdites parties et un levier (38) monté à friction sur l'autre partie, disposé et dimensionné de manière à ce que : lorsque l'indicateur occupe sa première position extrême et que l'armage du ressort-moteur (14) se poursuit, ledit levier (38) est maintenu contre ladite butée et tourne à friction sur la partie dont il est solidaire, de telle sorte que l'indicateur reste immobile, et dès que le ressort-moteur (14) se désarme, l'indicateur quitte sa première position extrême, les première et deuxième parties du mobile intermédiaire (32) tournent ensemble. 2. Mechanism according to claim 1, characterized in that said friction mechanism comprises a stop (44) integral with one of said parts and a lever (38) frictionally mounted on the other part, arranged and dimensioned so as to what: when the indicator occupies its first extreme position and the winding of the mainspring (14) continues, said lever (38) is held against said stop and rotates frictionally on the part of which it is integral, such that the indicator remains stationary, and as soon as the mainspring (14) disarms, the indicator leaves its first extreme position, the first and second parts of the intermediate mobile (32) rotate together.
3. Mécanisme selon la revendication 2, caractérisé en ce que ledit levier (38) est doté d'une fente longitudinale (41) s'élargissant en une ouverture (42) engagée sur le pignon (34).3. Mechanism according to claim 2, characterized in that said lever (38) is provided with a longitudinal slot (41) widening in an opening (42) engaged on the pinion (34).
4. Mécanisme selon l'une des revendications 2 et 3, caractérisé en ce que ledit élément élastique (40) est solidaire de la partie comportant ladite butée (44) et coopère avec ledit levier (38) de manière à ce que, lorsque ledit indicateur occupe sa deuxième position extrême, il est immobilisé, alors que le ressort- moteur (14) entraîne le rouage de finissage et ledit engrenage différentiel, et que ledit élément élastique (40) s'arme, puis se désarme lors de l'armage du ressort-moteur.4. Mechanism according to one of claims 2 and 3, characterized in that said elastic element (40) is integral with the part comprising said stop (44) and cooperates with said lever (38) so that, when said indicator occupies its second extreme position, it is immobilized, while the mainspring (14) drives the gear train and said differential gear, and said elastic element (40) is armed, then disarmed during arming of the mainspring.
5. Mécanisme selon la revendication 4, caractérisé en ce que ledit élément élastique (40) est formé d'une lame élastique fixée par l'une de ses extrémités à ladite roue (36), tandis que son autre extrémité (46), libre, est disposée de manière à ce qu'elle maintienne le levier contre ladite première extrémité.5. Mechanism according to claim 4, characterized in that said elastic element (40) is formed of an elastic blade fixed by one of its ends to said wheel (36), while its other end (46), free , is arranged so that it maintains the lever against said first end.
6. Mécanisme selon l'une des revendications 1 à 5, caractérisé en ce que ledit mobile intermédiaire (32) comporte une roue (36) formée d'une planche (36a) dont la périphérie est munie d'une denture (36b), un pignon (34) formé d'un manchon (34a) muni à l'une de ses extrémités d'une denture (34b), une entretoise (37) disposée sur le manchon (34a), ledit levier étant monté solidairement sur le manchon (34a) pour maintenir ladite roue (36) libre en rotation sur l'entretoise (37), et en ce que la partie reliée à la sortie (20) est la roue (36).6. Mechanism according to one of claims 1 to 5, characterized in that said intermediate mobile (32) comprises a wheel (36) formed by a board (36a) whose periphery is provided with a toothing (36b), a pinion (34) formed by a sleeve (34a) provided at one of its ends with a toothing (34b), a spacer (37) disposed on the sleeve (34a), said lever being mounted integrally on the sleeve (34a) to keep said wheel (36) free to rotate on the spacer (37), and in that the part connected to the outlet (20) is the wheel (36).
7. Mécanisme selon l'une des revendications 1 à 6, caractérisé en ce que ledit ressort-moteur (14) est de type à bride glissante. 7. Mechanism according to one of claims 1 to 6, characterized in that said motor spring (14) is of the sliding flange type.
EP05702190A 2004-02-04 2005-01-07 Power reserve indicator mechanism Withdrawn EP1711865A1 (en)

Priority Applications (1)

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EP04002419A EP1562086B1 (en) 2004-02-04 2004-02-04 Power reserve indicator mechanism
PCT/IB2005/000019 WO2005085963A1 (en) 2004-02-04 2005-01-07 Run reserve device indicating
EP05702190A EP1711865A1 (en) 2004-02-04 2005-01-07 Power reserve indicator mechanism

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HK1076876A1 (en) 2006-01-27
CN1914565A (en) 2007-02-14
CN100524097C (en) 2009-08-05
US20090161495A1 (en) 2009-06-25
TW200535577A (en) 2005-11-01
WO2005085963A1 (en) 2005-09-15
MY140197A (en) 2009-11-30
US7684285B2 (en) 2010-03-23
ATE534939T1 (en) 2011-12-15
JP2007520717A (en) 2007-07-26
EP1562086B1 (en) 2011-11-23
JP4566201B2 (en) 2010-10-20

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