EP1074897B1 - Device for displaying the power-reserve of a timepiece - Google Patents

Device for displaying the power-reserve of a timepiece Download PDF

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Publication number
EP1074897B1
EP1074897B1 EP99115389A EP99115389A EP1074897B1 EP 1074897 B1 EP1074897 B1 EP 1074897B1 EP 99115389 A EP99115389 A EP 99115389A EP 99115389 A EP99115389 A EP 99115389A EP 1074897 B1 EP1074897 B1 EP 1074897B1
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EP
European Patent Office
Prior art keywords
wheel
pinion
display
gear
barrel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP99115389A
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German (de)
French (fr)
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EP1074897A1 (en
Inventor
Alain Zaugg
Capt Edmond
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.)
Frederic Piguet SA
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Frederic Piguet SA
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Publication date
Application filed by Frederic Piguet SA filed Critical Frederic Piguet SA
Priority to ES99115389T priority Critical patent/ES2325232T3/en
Priority to AT99115389T priority patent/ATE428958T1/en
Priority to DE69940727T priority patent/DE69940727D1/en
Priority to EP99115389A priority patent/EP1074897B1/en
Priority to US09/631,381 priority patent/US6685352B1/en
Priority to JP2000236689A priority patent/JP4671477B2/en
Publication of EP1074897A1 publication Critical patent/EP1074897A1/en
Application granted granted Critical
Publication of EP1074897B1 publication Critical patent/EP1074897B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B13/00—Gearwork
    • G04B13/007—Gearwork with differential work
    • G04B13/008—Differentials
    • 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 a power reserve indicator device for a timepiece, that is to say a device for indicating to the wearer the degree of development or reassembly of the mainspring of a timepiece mechanical.
  • This indicator comprises a pinion which is integral with the hour wheel and whose axis is the axis of a plane differential gear. Said pinion drives a satellite pinion which pivots on a plate and which meshes with the inner toothing of a differential ring.
  • This differential ring freely adjusted on a cylindrical core of the plate, comprises an external toothing which meshes with a power reserve pinion integral with the barrel shaft.
  • the hour wheel When the hour wheel turns, it drives the pinion which meshes with the pinion satellite.
  • the differential ring As the differential ring is substantially stationary in normal operation of the watch, the planet pinion rotates about itself and rolls on the internal toothing of said differential ring, which causes the rotation of the plate.
  • the plate itself supports a indicator disc which makes an angular displacement according to the power reserve which can still be provided by the winding of the mainspring.
  • the hour wheel when raising the barrel spring, the hour wheel, and therefore the pinion, remain substantially immobile.
  • the barrel shaft on which is mounted a pinion rotates.
  • This barrel pinion turning, drives the differential ring by means of a return.
  • the differential ring meshes with its internal teeth with the satellite.
  • the satellite rolls on the pinion gear and drives the plate in rotation.
  • the indicator disk supported by the plate, makes an angular displacement in the opposite direction to the previous one as a function of the power reserve provided by the number of winding turns of the mainspring.
  • the power reserve indicator mechanism described above has serious drawbacks. Indeed, when setting the time of the watch, it is necessary to come block this mechanism so that the indication of the reserve of walking is not distorted by the rotation of the hour wheel on which is fixed the pinion. To remedy this problem, the patent CH 689 414 proposes a rather complex system in which the power reserve indicator disk is elastically adjusted on the plate. A setting spring moves under the action of the time setting rod and urges a limiting pin which compresses the indicator disk against the frame, so that said indicator disk is no longer driven by the plateau and remains motionless in the position it occupies. Such a construction, comprising several moving parts relative to each other, is unreliable and likely to be easily damaged.
  • the patent document CH 13340 describes a planetary gear with double satellite (pinion and wheel) and without crown.
  • the pinion and wheel that make up the double satellite rotate at the same speed but generate a gear ratio (the wheel has a larger number of teeth than the pinion) that performs the differential function.
  • the differential described in the patent document CH 13340 is therefore flat but can not be located in the center of the movement because it does not have a crown with internal teeth.
  • the object of the present invention is to remedy the above-mentioned problems and disadvantages as well as others by proposing a power-reserve indicator device for a timepiece that has a small footprint as well as a great simplicity of construction.
  • the present invention relates to a power reserve indicator device for a timepiece with manual or automatic winding according to claim 1
  • the present invention provides a power reserve indicator device having separate arming and disarming gearing, so that such a device can be easily integrated into a large number of different motions.
  • the differential gear is positioned in the center of the movement on the hour wheel. This makes it possible to distribute the display of the power reserve on all the positions of the dial indifferently, and to arrange the differential gear inside the date disc. On the other hand, if the differential gear was not positioned at the center of the movement, it should be smaller, and therefore more difficult to achieve.
  • the differential gearing is of simple planetary type whereas usually the differential gears used in the power reserve indicator mechanisms are of planetary type with double satellite and double central gear.
  • This solution thus makes it possible to obtain a differential gear that is flatter than in the past, which substantially reduces its bulk.
  • FIG. 1 The elevation views of figures 1 and 2 partially illustrate a timepiece of the wristwatch type for example, equipped with a power reserve indicator device according to the present invention and generally designated by the general numerical reference 1.
  • the watch comprises a watch movement equipped with a cylinder (not shown) in which is housed a mainspring (also not shown).
  • the movement may, depending on the case, be manual winding or automatic. In the latter case, a disengaging mechanism must be provided to avoid distorting the power reserve indication when the mainspring is fully armed and the flange slides in the barrel.
  • the power reserve indicator device 1 comprises a rotary display element formed, for example, of a power-reserve needle 2. This needle 2, as a function of the relative position it occupies with respect to a mark on the dial 4 of the timepiece indicates to the wearer the power reserve available according to the number of winding turns of the mainspring.
  • the rotational drive of the needle 2 is carried out using two kinematic chains driven by a first and a second PTO, namely respectively the barrel plug and the external toothing of said cylinder or a mobile driven by this barrel.
  • the first kinematic chain also called the arming gear, is generally designated by the general numerical reference 6. This first kinematic chain 6 meshes with a first input 8 of a differential gear 10.
  • the second kinematic chain also called disarming gear, is generally designated by the general numerical reference 12.
  • This second kinematic chain 12 meshes with a second input 14 of the aforementioned differential gear 10.
  • the output 16 of the differential gear 10 meshes with a third kinematic chain 18 also called display gear which drives the display needle 2 in rotation.
  • an armature return Z T is driven on the barrel shaft (not shown) of the watch.
  • the armature return Z T is engaged with an intermediate armoring device 20 comprising an intermediate arm gear Z R driven on the axis of rotation 22 of an intermediate winding wheel Z S.
  • the intermediate mobile armature 20 in turn drives, via its pinion Z R, an intermediate reinforcement deflection Z Q driven on an axis of rotation 24.
  • Said return Z Q then meshes with the first input 8 of the differential gear 10.
  • This first input 8 is constituted by a satellite input mobile 26 comprising a satellite input pinion Z 1 driven on a satellite input wheel Z P.
  • the satellite input pinion Z 1 drives two planet gears Z 2 which, in turn, meshes with the internal toothing Z 3 of a differential ring 28.
  • the two planet gears Z 2 are freely adjusted on axes of rotation 30 carried by a Z 4 satellite output return.
  • the latter consists of an intermediate display carriage 32 comprising an intermediate display gear Z 6 driven on an intermediate display wheel Z 5 .
  • the intermediate display unit 32 disposed at the output 16 of the differential gearing 10, is rotated by the satellite output gearbox Z 4 .
  • said intermediate display unit 32 meshes with its Z 6 pinion gear with a power reserve display wheel Z RM on the axis 34 from which the display member 2 is driven.
  • the disarming gear 12 includes a disengagement gear Z E which meshes with a second power take-off formed by the external toothing of the barrel or by a mobile driven by this barrel (not shown).
  • the disengagement referral Z E is engaged with an intermediate disarming mobile 36 which comprises an intermediate disengagement gear Z C driven on the axis of rotation of an intermediate disassembly wheel Z D.
  • the intermediate mobile disarming 36 in turn drives by its pinion Z C an intermediate disengagement Z B.
  • Said reference Z B then meshes with the second input 14 of the differential gear 10.
  • This second input 14 is constituted by the external toothing Z A of the differential gear 28.
  • the disengagement return Z E is rotated by the external toothing of the cylinder or by a mobile which meshes with said external toothing.
  • the disengagement gear Z E meshes with the wheel Z D of the disarming intermediate wheel 36, the pinion Z C of which is engaged with the intermediate disengagement gear Z B.
  • Said reference Z B then meshes with the external toothing Z A of the differential ring gear 28.
  • the differential ring gear 28 drives the two planet gears Z 2 by its internal toothing Z 3 .
  • the gear train 6 does not turn.
  • the satellite input wheel Z P and the satellite input gear Z 1 driven on said wheel Z P are stationary.
  • the two planet gears Z 2 driven in rotation by the internal teeth Z 3 of the differential ring 28, thus rotate on themselves around their respective axes 30 and roll on the satellite input pinion Z 1 which is fixed. .
  • the satellite output Z 4 carries the two satellite gears Z 2 , it is rotated by said planet gears Z 2 .
  • the Z satellite output junction 4 meshes with the intermediate display carriage 32, the Z 6 pinion drives the power reserve display wheel Z RM and the display needle 2 which is integral with said display wheel Z RM .
  • the display needle 2 thus performs an angular displacement as a function of the power reserve which can still be provided by the winding of the mainspring.
  • the barrel shaft causes the winding return Z T to rotate.
  • the return winding T Z S Z meshes with the wheel of the movable intermediate winding 20 whose Z R pinion meshes with the intermediate wheel winding Z Q.
  • Said return Z Q then meshes with the satellite input wheel Z P.
  • the satellite input gear Z 1 which rotates at the same time as said satellite input wheel Z P drives the planet gears Z 2 in rotation.
  • the disarming gear 12 is substantially stationary. Therefore, the differential ring 28 with its outer teeth Z A and inner Z 3 does not turn.
  • the two planet gears Z 2 driven in rotation by the satellite input pinion Z 1 , thus turn on themselves around their respective axes 30 and roll on the internal toothing Z 3 of the differential ring 28 which is fixed. .
  • the satellite output Z 4 carries the two planet gears Z 2 , it is rotated by said planet gears Z 2 in the opposite direction to the previous one.
  • the Z satellite output junction 4 meshes with the intermediate display carriage 32 whose Z pinion 6 drives the power reserve display wheel Z RM and the display needle 2 which is connected to said display wheel Z RM .
  • the display needle 2 thus makes an angular displacement in the opposite direction to the previous one as a function of the power reserve provided by the number of winding turns of the mainspring.
  • the differential gear 10 is positioned in the center of the movement, on the hour wheel 38. This advantageously allows to distribute the display of the power reserve indication on all positions of the dial indifferently, and to adapt to the aesthetics of the dial of the watch. Furthermore, since the differential gearing 10 is disposed at the center of the movement, it is possible to make it with larger geometric dimensions than if it were housed at the periphery of the housing, hence a greater simplicity of manufacture.
  • gear train 6 and the disarming gear train 12 constitute two perfectly distinct gear trains offers the person skilled in the art the possibility of adapting the mechanism according to the present invention to a large number of movements. different.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Retarders (AREA)
  • Gears, Cams (AREA)
  • Electric Clocks (AREA)
  • Gear Transmission (AREA)
  • Electromechanical Clocks (AREA)

Abstract

Winding indicator has a simple differential planetary gear train (10) with input (8) from an arming wheel (6) driven by the cylinder center and a second input (14) from a disarming wheel (12) driven from the outside of the cylinder with output wheel (16) driving an indicator wheel (18).

Description

La présente invention concerne un dispositif indicateur de réserve de marche pour pièce d'horlogerie, c'est-à-dire un dispositif permettant d'indiquer au porteur le degré de développement ou de remontage du ressort de barillet d'une pièce d'horlogerie mécanique.The present invention relates to a power reserve indicator device for a timepiece, that is to say a device for indicating to the wearer the degree of development or reassembly of the mainspring of a timepiece mechanical.

On connaît des dispositifs indicateurs de réserve de marche pour pièces d'horlogeries tels que celui décrit dans le brevet CH 689 414 . Cet indicateur comprend un pignon de marche qui est solidaire de la roue des heures et dont l'axe constitue l'axe d'un engrenage différentiel plan. Ledit pignon de marche entraîne un pignon satellite qui pivote sur un plateau et qui engrène d'autre part avec la denture intérieure d'une couronne de différentiel. Cette couronne de différentiel, ajustée librement sur un noyau cylindrique du plateau, comprend une denture extérieure qui engrène avec un pignon de réserve de marche solidaire de l'arbre de barillet.There are known power-reserve indicator devices for timepieces such as that described in the patent. CH 689 414 . This indicator comprises a pinion which is integral with the hour wheel and whose axis is the axis of a plane differential gear. Said pinion drives a satellite pinion which pivots on a plate and which meshes with the inner toothing of a differential ring. This differential ring, freely adjusted on a cylindrical core of the plate, comprises an external toothing which meshes with a power reserve pinion integral with the barrel shaft.

Lorsque la roue des heures tourne, elle entraîne le pignon de marche qui engrène avec le pignon satellite. Comme la couronne de différentiel est sensiblement immobile en fonctionnement normal de la montre, le pignon satellite tourne sur lui-même autour de son axe et roule sur la denture intérieure de ladite couronne de différentiel, ce qui entraîne la rotation du plateau. Le plateau supporte lui-même un disque indicateur qui effectue un déplacement angulaire en fonction de la réserve de marche qui peut encore être assurée par l'armage du ressort de barillet.When the hour wheel turns, it drives the pinion which meshes with the pinion satellite. As the differential ring is substantially stationary in normal operation of the watch, the planet pinion rotates about itself and rolls on the internal toothing of said differential ring, which causes the rotation of the plate. The plate itself supports a indicator disc which makes an angular displacement according to the power reserve which can still be provided by the winding of the mainspring.

Inversement, lorsqu'on remonte le ressort de barillet, la roue des heures, et donc le pignon de marche, restent sensiblement immobiles. Par contre, l'arbre de barillet sur lequel est monté un pignon tourne. Ce pignon d'arbre de barillet, en tournant, entraîne la couronne de différentiel par l'intermédiaire d'un renvoi. A son tour, la couronne de différentiel engrène par sa denture intérieure avec le satellite. Comme la roue des heures est immobile, le satellite roule sur le pignon de marche et entraîne le plateau en rotation. Le disque indicateur, supporté par le plateau, effectue un déplacement angulaire en sens opposé au précédent en fonction de la réserve de marche assurée par le nombre de tours d'armage du ressort de barillet.Conversely, when raising the barrel spring, the hour wheel, and therefore the pinion, remain substantially immobile. By cons, the barrel shaft on which is mounted a pinion rotates. This barrel pinion, turning, drives the differential ring by means of a return. In turn, the differential ring meshes with its internal teeth with the satellite. As the hour wheel is stationary, the satellite rolls on the pinion gear and drives the plate in rotation. The indicator disk, supported by the plate, makes an angular displacement in the opposite direction to the previous one as a function of the power reserve provided by the number of winding turns of the mainspring.

Le mécanisme indicateur de réserve de marche décrit ci-dessus présente de sérieux inconvénients. En effet, lors de la mise à l'heure de la montre, il faut venir bloquer ce mécanisme afin que l'indication de la réserve de marche ne soit pas faussée par la rotation de la roue des heures sur laquelle est fixé le pignon de marche. Pour remédier à ce problème, le brevet CH 689 414 propose un système assez complexe dans lequel le disque indicateur de réserve de marche est ajusté élastiquement sur le plateau. Un ressort de mise à l'heure se déplace sous l'action de la tige de mise à l'heure et sollicite un tenon de limitation qui vient comprimer le disque indicateur contre le bâti, de sorte que ledit disque indicateur ne soit plus entraîné par le plateau et reste immobile dans la position qu'il occupe. Une telle construction, comprenant plusieurs pièces en mouvement les unes par rapport aux autres, est peu fiable et susceptible de s'endommager facilement.The power reserve indicator mechanism described above has serious drawbacks. Indeed, when setting the time of the watch, it is necessary to come block this mechanism so that the indication of the reserve of walking is not distorted by the rotation of the hour wheel on which is fixed the pinion. To remedy this problem, the patent CH 689 414 proposes a rather complex system in which the power reserve indicator disk is elastically adjusted on the plate. A setting spring moves under the action of the time setting rod and urges a limiting pin which compresses the indicator disk against the frame, so that said indicator disk is no longer driven by the plateau and remains motionless in the position it occupies. Such a construction, comprising several moving parts relative to each other, is unreliable and likely to be easily damaged.

Le document de brevet CH 13340 décrit un train planétaire à double satellite (pignon et roue) et sans couronne. Le pignon et la roue qui constituent le double satellite tournent à la même vitesse mais engendrent un rapport de démultiplication (la roue à un plus grand nombre de dents que le pignon) qui réalise la fonction de différentiel. Le différentiel décrit dans le document de brevet CH 13340 est donc plan mais ne peut être situé au centre du mouvement du fait qu'il ne comporte pas de couronne à denture intérieure.The patent document CH 13340 describes a planetary gear with double satellite (pinion and wheel) and without crown. The pinion and wheel that make up the double satellite rotate at the same speed but generate a gear ratio (the wheel has a larger number of teeth than the pinion) that performs the differential function. The differential described in the patent document CH 13340 is therefore flat but can not be located in the center of the movement because it does not have a crown with internal teeth.

La présente invention a pour but de remédier aux problèmes et inconvénients ci-dessus ainsi qu'à d'autres encore en proposant un dispositif indicateur de réserve de marche pour pièce d'horlogerie présentant un faible encombrement ainsi qu'une grande simplicité de construction.The object of the present invention is to remedy the above-mentioned problems and disadvantages as well as others by proposing a power-reserve indicator device for a timepiece that has a small footprint as well as a great simplicity of construction.

A cet effet, la présente invention concerne un dispositif indicateur de réserve de marche pour une pièce d'horlogerie à remontage manuel ou automatique selon la revendication 1For this purpose, the present invention relates to a power reserve indicator device for a timepiece with manual or automatic winding according to claim 1

Grâce à ces caractéristiques, la présente invention procure un dispositif indicateur de réserve de marche comportant des rouages d'armage et de désarmage distincts, de sorte qu'un tel dispositif peut être facilement intégré dans un grand nombre de mouvements différents.Thanks to these features, the present invention provides a power reserve indicator device having separate arming and disarming gearing, so that such a device can be easily integrated into a large number of different motions.

Selon une caractéristique complémentaire de l'invention, l'engrenage différentiel est positionné au centre du mouvement, sur la roue des heures. Ceci permet de distribuer l'affichage de la réserve de marche sur toutes les positions du cadran indifféremment, et de disposer l'engrenage différentiel à l'intérieur du disque de quantième. D'autre part, si l'engrenage différentiel n'était pas positionné au centre du mouvement, il devrait être plus petit, et serait donc plus difficile à réaliser.According to a complementary feature of the invention, the differential gear is positioned in the center of the movement on the hour wheel. This makes it possible to distribute the display of the power reserve on all the positions of the dial indifferently, and to arrange the differential gear inside the date disc. On the other hand, if the differential gear was not positioned at the center of the movement, it should be smaller, and therefore more difficult to achieve.

Selon une autre caractéristique de l'invention, l'engrenage différentiel est de type planétaire simple alors qu'habituellement les engrenages différentiels utilisés dans les mécanismes indicateurs de réserve de marche sont de type planétaire à double satellite et double pignon central. Cette solution permet donc d'obtenir un engrenage différentiel plus plat que par le passé, ce qui réduit sensiblement son encombrement.According to another characteristic of the invention, the differential gearing is of simple planetary type whereas usually the differential gears used in the power reserve indicator mechanisms are of planetary type with double satellite and double central gear. This solution thus makes it possible to obtain a differential gear that is flatter than in the past, which substantially reduces its bulk.

D'autres caractéristiques et avantages de la présente invention apparaîtront plus clairement à la lecture de la description détaillée qui suit d'un exemple de réalisation du dispositif indicateur de réserve de marche selon l'invention, cet exemple étant donné à titre purement illustratif et non limitatif, en liaison avec les dessins annexés dans lesquels :

  • la figure 1 est une vue en élévation du mécanisme indicateur de réserve de marche selon l'invention sur laquelle on a représenté plus particulièrement le rouage d'armage et le rouage d'affichage;
  • la figure 2 est une vue analogue à celle de la figure 1 sur laquelle est représenté le rouage de désarmage, et
  • la figure 3 est une vue en plan du mécanisme d'entraînement de l'indicateur de réserve de marche selon l'invention, les organes d'affichage ayant été omis.
Other features and advantages of the present invention will emerge more clearly on reading the following detailed description of an exemplary embodiment of the power reserve indicator device according to the invention, this example being given purely for illustrative purposes and not in connection with the accompanying drawings in which:
  • the figure 1 is an elevational view of the power reserve indicator mechanism according to the invention on which is more particularly shown the gear train and display gear;
  • the figure 2 is a view similar to that of the figure 1 on which is represented the disarming gear, and
  • the figure 3 is a plan view of the drive mechanism of the power reserve indicator according to the invention, the display members having been omitted.

Les vues en élévation des figures 1 et 2 illustrent partiellement une pièce d'horlogerie du type montre-bracelet par exemple, équipée d'un dispositif indicateur de réserve de marche conforme à la présente invention et désigné dans son ensemble par la référence numérique générale 1. La montre comprend un mouvement d'horlogerie muni d'un barillet (non représenté) dans lequel est logé un ressort de barillet (également non représenté). Le mouvement peut, selon le cas, être à remontage manuel ou automatique. Dans ce dernier cas, un mécanisme à débrayage devra être prévu pour ne pas fausser l'indication de réserve de marche lorsque le ressort du barillet est armé au maximum et que la bride glisse dans le barillet.The elevation views of figures 1 and 2 partially illustrate a timepiece of the wristwatch type for example, equipped with a power reserve indicator device according to the present invention and generally designated by the general numerical reference 1. The watch comprises a watch movement equipped with a cylinder (not shown) in which is housed a mainspring (also not shown). The movement may, depending on the case, be manual winding or automatic. In the latter case, a disengaging mechanism must be provided to avoid distorting the power reserve indication when the mainspring is fully armed and the flange slides in the barrel.

Le dispositif indicateur de réserve de marche 1 comprend un organe d'affichage rotatif formé, par exemple, d'une aiguille de réserve de marche 2. Cette aiguille 2, en fonction de la position relative qu'elle occupe vis-à-vis d'un repère reporté sur le cadran 4 de la pièce d'horlogerie, indique au porteur la réserve de marche disponible en fonction du nombre de tours d'armage du ressort de barillet.The power reserve indicator device 1 comprises a rotary display element formed, for example, of a power-reserve needle 2. This needle 2, as a function of the relative position it occupies with respect to a mark on the dial 4 of the timepiece indicates to the wearer the power reserve available according to the number of winding turns of the mainspring.

L'examen attentif des figures 1 à 3 permettra de comprendre le fonctionnement du mécanisme d'entraînement de l'organe d'affichage 2 du dispositif indicateur de réserve de marche selon l'invention.The careful examination of Figures 1 to 3 will understand the operation of the drive mechanism of the display member 2 of the power reserve indicator device according to the invention.

L'entraînement en rotation de l'aiguille 2 est réalisé à l'aide de deux chaînes cinématiques entraînées par une première et une seconde prises de force, à savoir respectivement la bonde de barillet et la denture extérieure dudit barillet ou un mobile entraîné par ce barillet.The rotational drive of the needle 2 is carried out using two kinematic chains driven by a first and a second PTO, namely respectively the barrel plug and the external toothing of said cylinder or a mobile driven by this barrel.

La première chaîne cinématique, encore appelée rouage d'armage, est désignée dans son ensemble par la référence numérique générale 6. Cette première chaîne cinématique 6 engrène avec une première entrée 8 d'un engrenage différentiel 10.The first kinematic chain, also called the arming gear, is generally designated by the general numerical reference 6. This first kinematic chain 6 meshes with a first input 8 of a differential gear 10.

La seconde chaîne cinématique, encore appelée rouage de désarmage, est désignée dans son ensemble par la référence numérique générale 12. Cette seconde chaîne cinématique 12 engrène avec une seconde entrée 14 de l'engrenage différentiel 10 susmentionné.The second kinematic chain, also called disarming gear, is generally designated by the general numerical reference 12. This second kinematic chain 12 meshes with a second input 14 of the aforementioned differential gear 10.

Enfin, la sortie 16 de l'engrenage différentiel 10 engrène avec une troisième chaîne cinématique 18 encore appelée rouage d'affichage qui entraîne l'aiguille d'affichage 2 en rotation.Finally, the output 16 of the differential gear 10 meshes with a third kinematic chain 18 also called display gear which drives the display needle 2 in rotation.

Nous allons maintenant examiner successivement les différents éléments qui composent les chaînes cinématiques énumérées ci-dessus.We will now examine successively the different elements that make up the kinematic chains listed above.

En ce qui concerne le rouage d'armage 6, un renvoi d'armage ZT est chassé sur l'arbre de barillet (non représenté) de la montre. Le renvoi d'armage ZT est en prise avec un mobile intermédiaire d'armage 20 comprenant un pignon intermédiaire d'armage ZR chassé sur l'axe de rotation 22 d'une roue intermédiaire d'armage ZS. Le mobile intermédiaire d'armage 20 entraîne à son tour par son pignon ZR un renvoi intermédiaire d'armage ZQ chassé sur un axe de rotation 24. Ledit renvoi ZQ engrène ensuite avec la première entrée 8 de l'engrenage différentiel 10. Cette première entrée 8 est constituée par un mobile d'entrée de satellite 26 comportant un pignon d'entrée de satellite Z1 chassé sur une roue d'entrée de satellite ZP.As regards the gear train 6, an armature return Z T is driven on the barrel shaft (not shown) of the watch. The armature return Z T is engaged with an intermediate armoring device 20 comprising an intermediate arm gear Z R driven on the axis of rotation 22 of an intermediate winding wheel Z S. The intermediate mobile armature 20 in turn drives, via its pinion Z R, an intermediate reinforcement deflection Z Q driven on an axis of rotation 24. Said return Z Q then meshes with the first input 8 of the differential gear 10. This first input 8 is constituted by a satellite input mobile 26 comprising a satellite input pinion Z 1 driven on a satellite input wheel Z P.

Comme on le comprendra mieux par la suite lorsqu'on décrira en détail le fonctionnement du dispositif indicateur de réserve de marche 1 selon l'invention, le pignon d'entrée de satellite Z1 entraîne deux pignons satellites Z2 qui, à leur tour, engrènent avec la denture intérieure Z3 d'une couronne de différentiel 28. Les deux pignons satellites Z2 sont ajustés librement sur des axes de rotation 30 portés par un renvoi de sortie de satellite Z4.As will be better understood later when describing in detail the operation of the power reserve indicator device 1 according to the invention, the satellite input pinion Z 1 drives two planet gears Z 2 which, in turn, meshes with the internal toothing Z 3 of a differential ring 28. The two planet gears Z 2 are freely adjusted on axes of rotation 30 carried by a Z 4 satellite output return.

En ce qui concerne le rouage d'affichage 18, celui-ci est constitué par un mobile intermédiaire d'affichage 32 comprenant un pignon intermédiaire d'affichage Z6 chassé sur une roue intermédiaire d'affichage Z5. Le mobile intermédiaire d'affichage 32, disposé à la sortie 16 de l'engrenage différentiel 10, est entraîné en rotation par le renvoi de sortie de satellite Z4. A son tour, ledit mobile intermédiaire d'affichage 32 engrène par son pignon Z6 avec une roue d'affichage de réserve de marche ZRM sur l'axe 34 de laquelle est chassé l'organe d'affichage 2.Regarding the display train 18, the latter consists of an intermediate display carriage 32 comprising an intermediate display gear Z 6 driven on an intermediate display wheel Z 5 . The intermediate display unit 32, disposed at the output 16 of the differential gearing 10, is rotated by the satellite output gearbox Z 4 . In turn, said intermediate display unit 32 meshes with its Z 6 pinion gear with a power reserve display wheel Z RM on the axis 34 from which the display member 2 is driven.

Enfin, le rouage de désarmage 12 comprend un renvoi de désarmage ZE qui engrène avec une seconde prise de force formée par la denture extérieure du barillet ou par un mobile entraîné par ce barillet (non représenté). Le renvoi de désarmage ZE est en prise avec un mobile intermédiaire de désarmage 36 qui comprend un pignon intermédiaire de désarmage ZC chassé sur l'axe de rotation d'une roue intermédiaire de désarmage ZD. Le mobile intermédiaire de désarmage 36 entraîne à son tour par son pignon ZC un renvoi intermédiaire de désarmage ZB. Ledit renvoi ZB engrène ensuite avec la deuxième entrée 14 de l'engrenage différentiel 10. Cette seconde entrée 14 est constituée par la denture extérieure ZA de la couronne de différentiel 28.Finally, the disarming gear 12 includes a disengagement gear Z E which meshes with a second power take-off formed by the external toothing of the barrel or by a mobile driven by this barrel (not shown). The disengagement referral Z E is engaged with an intermediate disarming mobile 36 which comprises an intermediate disengagement gear Z C driven on the axis of rotation of an intermediate disassembly wheel Z D. The intermediate mobile disarming 36 in turn drives by its pinion Z C an intermediate disengagement Z B. Said reference Z B then meshes with the second input 14 of the differential gear 10. This second input 14 is constituted by the external toothing Z A of the differential gear 28.

Lorsque la montre fonctionne normalement, c'est-à-dire lorsque le ressort de barillet est en cours de désarmage, le renvoi de désarmage ZE est entraîné en rotation par la denture extérieure du barillet ou par un mobile qui engrène avec ladite denture extérieure. A son tour, le renvoi de désarmage ZE engrène avec la roue ZD du mobile intermédiaire de désarmage 36 dont le pignon ZC est en prise avec le renvoi intermédiaire de désarmage ZB. Ledit renvoi ZB engrène ensuite avec la denture extérieure ZA de la couronne de différentiel 28. Finalement, la couronne de différentiel 28 entraîne par sa denture intérieure Z3 les deux pignons satellites Z2.When the watch is operating normally, that is to say when the mainspring is being disarmed, the disengagement return Z E is rotated by the external toothing of the cylinder or by a mobile which meshes with said external toothing. . In turn, the disengagement gear Z E meshes with the wheel Z D of the disarming intermediate wheel 36, the pinion Z C of which is engaged with the intermediate disengagement gear Z B. Said reference Z B then meshes with the external toothing Z A of the differential ring gear 28. Finally, the differential ring gear 28 drives the two planet gears Z 2 by its internal toothing Z 3 .

Pendant le fonctionnement normal de la montre, le rouage d'armage 6 ne tourne pas. Par conséquent, la roue d'entrée de satellite ZP et le pignon d'entrée de satellite Z1 chassé sur ladite roue ZP sont immobiles. Les deux pignons satellites Z2, entraînés en rotation par la denture intérieure Z3 de la couronne de différentiel 28, tournent ainsi sur eux-mêmes autour de leurs axes 30 respectifs et roulent sur le pignon d'entrée de satellite Z1 qui est fixe. Comme le renvoi de sortie de satellite Z4 porte les deux pignons satellites Z2, il est entraîné en rotation par lesdits pignons satellites Z2. En tournant, le renvoi de sortie de satellite Z4 engrène avec le mobile intermédiaire d'affichage 32 dont le pignon Z6 entraîne la roue d'affichage de réserve de marche ZRM et l'aiguille d'affichage 2 qui est solidaire de ladite roue d'affichage ZRM. L'aiguille d'affichage 2 effectue ainsi un déplacement angulaire en fonction de la réserve de marche qui peut encore être assurée par l'armage du ressort de barillet.During normal operation of the watch, the gear train 6 does not turn. As a result, the satellite input wheel Z P and the satellite input gear Z 1 driven on said wheel Z P are stationary. The two planet gears Z 2 , driven in rotation by the internal teeth Z 3 of the differential ring 28, thus rotate on themselves around their respective axes 30 and roll on the satellite input pinion Z 1 which is fixed. . As the satellite output Z 4 carries the two satellite gears Z 2 , it is rotated by said planet gears Z 2 . By turning, the Z satellite output junction 4 meshes with the intermediate display carriage 32, the Z 6 pinion drives the power reserve display wheel Z RM and the display needle 2 which is integral with said display wheel Z RM . The display needle 2 thus performs an angular displacement as a function of the power reserve which can still be provided by the winding of the mainspring.

Lorsqu'on remonte la montre en vue du réarmage du ressort de barillet, l'arbre de barillet entraîne le renvoi d'armage ZT en rotation. A son tour, le renvoi d'armage ZT engrène avec la roue ZS du mobile intermédiaire d'armage 20 dont le pignon ZR est en prise avec le renvoi intermédiaire d'armage ZQ. Ledit renvoi ZQ engrène ensuite avec la roue d'entrée de satellite ZP. Finalement, le pignon d'entrée de satellite Z1 qui tourne en même temps que ladite roue d'entrée de satellite ZP entraîne les pignons satellites Z2 en rotation.When the watch is raised for the purpose of rearming the mainspring, the barrel shaft causes the winding return Z T to rotate. In turn, the return winding T Z S Z meshes with the wheel of the movable intermediate winding 20 whose Z R pinion meshes with the intermediate wheel winding Z Q. Said return Z Q then meshes with the satellite input wheel Z P. Finally, the satellite input gear Z 1 which rotates at the same time as said satellite input wheel Z P drives the planet gears Z 2 in rotation.

Pendant le réarmage de la montre, le rouage de désarmage 12 est sensiblement immobile. Par conséquent, la couronne de différentiel 28 avec ses dentures extérieure ZA et intérieure Z3 ne tourne pas. Les deux pignons satellites Z2, entraînés en rotation par le pignon d'entrée de satellite Z1, tournent ainsi sur eux-mêmes autour de leurs axes 30 respectifs et roulent sur la denture intérieure Z3 de la couronne de différentiel 28 qui est fixe. Comme le renvoi de sortie de satellite Z4 porte les deux pignons satellites Z2, il est entraîné en rotation par lesdits pignons satellites Z2 dans le sens contraire au précédent. En tournant, le renvoi de sortie de satellite Z4 engrène avec le mobile intermédiaire d'affichage 32 dont le pignon Z6 entraîne la roue d'affichage de réserve de marche ZRM et l'aiguille d'affichage 2 qui est liée à ladite roue d'affichage ZRM. L'aiguille d'affichage 2 effectue ainsi un déplacement angulaire en sens opposé au précédent en fonction de la réserve de marche assurée par le nombre de tours d'armage du ressort de barillet.During the rearming of the watch, the disarming gear 12 is substantially stationary. Therefore, the differential ring 28 with its outer teeth Z A and inner Z 3 does not turn. The two planet gears Z 2 , driven in rotation by the satellite input pinion Z 1 , thus turn on themselves around their respective axes 30 and roll on the internal toothing Z 3 of the differential ring 28 which is fixed. . As the satellite output Z 4 carries the two planet gears Z 2 , it is rotated by said planet gears Z 2 in the opposite direction to the previous one. By turning, the Z satellite output junction 4 meshes with the intermediate display carriage 32 whose Z pinion 6 drives the power reserve display wheel Z RM and the display needle 2 which is connected to said display wheel Z RM . The display needle 2 thus makes an angular displacement in the opposite direction to the previous one as a function of the power reserve provided by the number of winding turns of the mainspring.

On remarquera la compacité de la construction proposée, particulièrement remarquable grâce à l'usage d'un engrenage différentiel 10 de type planétaire simple comprenant seulement un pignon d'entrée de satellite Z1, deux pignons satellites Z2 et une couronne de différentiel 28 avec une denture intérieure Z3 et une denture extérieure ZA. Ceci permet de réduire de façon très substantielle l'épaisseur de la pièce d'horlogerie équipée du dispositif selon l'invention. Ainsi, cette construction peut être montée sans difficulté dans une montre-bracelet.It will be noted the compactness of the proposed construction, particularly remarkable through the use of a single planetary type differential gear 10 comprising only a satellite input gear Z 1 , two planet gears Z 2 and a differential ring 28 with an internal toothing Z 3 and an external toothing Z A. This makes it possible to substantially reduce the thickness of the timepiece equipped with the device according to the invention. Thus, this construction can be mounted without difficulty in a wristwatch.

On remarquera d'autre part que l'engrenage différentiel 10 est positionné au centre du mouvement, sur la roue des heures 38. Ceci permet avantageusement de distribuer l'affichage de l'indication de réserve de marche sur toutes les positions du cadran indifféremment, et de s'adapter ainsi à l'esthétique du cadran de la montre. Par ailleurs, comme l'engrenage différentiel 10 est disposé au centre du mouvement, il est possible de le réaliser avec des dimensions géométriques plus importantes que s'il était logé à la périphérie du boîtier, d'où une plus grande simplicité de fabrication.Note also that the differential gear 10 is positioned in the center of the movement, on the hour wheel 38. This advantageously allows to distribute the display of the power reserve indication on all positions of the dial indifferently, and to adapt to the aesthetics of the dial of the watch. Furthermore, since the differential gearing 10 is disposed at the center of the movement, it is possible to make it with larger geometric dimensions than if it were housed at the periphery of the housing, hence a greater simplicity of manufacture.

Enfin, le fait que le rouage d'armage 6 et le rouage de désarmage 12 constituent deux trains d'engrenages parfaitement distincts offre à l'homme du métier la possibilité d'adapter le mécanisme conforme à la présente invention à un grand nombre de mouvements différents.Finally, the fact that the gear train 6 and the disarming gear train 12 constitute two perfectly distinct gear trains offers the person skilled in the art the possibility of adapting the mechanism according to the present invention to a large number of movements. different.

Claims (9)

  1. Power reserve indicator device (1) for a manually or automatically wound timepiece, said timepiece including a barrel, a mainspring housed in the barrel and time display elements mechanically coupled to said barrel, said indicator device (1) including a differential gear (10) a first input (8) of which is driven by a winding gear train (6) which meshes with a first driving gear formed by the barrel core, the output (16) of said differential gear (10) driving a display gear train (18) for indicating the reserve of power assured by the number of winding turns of the mainspring, the second input (14) of the differential gear (10) being driven by a letting down gear train (12) which meshes with a second driving gear formed by the outer toothing of said barrel or by a wheel and pinion driven by said barrel, characterized in that the differential gear (10) includes a differential crown (28) having an inner toothing (Z3) as well as one or two satellite pinions (Z2) meshing with the inner toothing (Z3), said differential crown (28) further having an outer toothing (ZA) forming the second input (14) of the differential gear (10).
  2. Device according to claim 1, characterised in that the differential gear (10) is positioned at the centre of the movement, on the hour wheel (38).
  3. Device according to any of claims 1 or 2, characterised in that the differential gear (10) further includes a satellite input wheel and pinion (26) including a satellite input pinion (Z1) driven onto a satellite input wheel (Zp).
  4. Device according to any of claims 1 to 3, characterised in that the one or the two satellite pinions (Z2) are carried by an intermediate satellite output wheel (Z4).
  5. Device according to any of claims 1 to 4, characterised in that the winding gear train (6) includes an intermediate winding wheel (ZT) driven onto the barrel arbour, this intermediate winding wheel (ZT) being meshed with an intermediate winding wheel and pinion (20) including an intermediate winding pinion (ZR) driven onto the rotational staff (22) of an intermediate winding wheel (Z5), said intermediate winding wheel and pinion (20) in turn driving, via its pinion (ZR), an intermediate winding wheel (ZQ).
  6. Device according to any of claims 1 to 5, characterised in that the letting down gear train (12) includes an intermediate letting down wheel (ZE) which meshes with the outer toothing of the barrel or with a wheel and pinion driven by said barrel, said intermediate letting down wheel (ZE) meshing with an intermediate letting down wheel and pinion (36) which includes an intermediate letting down pinion (ZC) driven onto the rotational staff of an intermediate letting down wheel (ZD), said intermediate letting down wheel and pinion (36) in turn driving, via its pinion (ZC), an intermediate letting down wheel (ZB).
  7. Device according to any of claims 1 to 6, characterised in that the display gear train (18) includes an intermediate display wheel and pinion (32) including an intermediate display pinion (Z6) driven onto an intermediate display wheel (Z5).
  8. Device according to any of claims 1 to 7, characterised in that the display gear train (18) drives a power reserve display wheel (ZRM) onto the rotational staff (34) of which is driven a power reserve indicator element (2).
  9. Display device according to claim 8, characterised in that the power reserve indicator element (2) is a hand.
EP99115389A 1999-08-04 1999-08-04 Device for displaying the power-reserve of a timepiece Expired - Lifetime EP1074897B1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
ES99115389T ES2325232T3 (en) 1999-08-04 1999-08-04 MARCH RESERVE INDICATOR DEVICE FOR A CLOCK PIECE.
AT99115389T ATE428958T1 (en) 1999-08-04 1999-08-04 DEVICE FOR DISPLAYING THE POWER RESERVE OF A WATCH
DE69940727T DE69940727D1 (en) 1999-08-04 1999-08-04 Device for displaying the power reserve of a watch
EP99115389A EP1074897B1 (en) 1999-08-04 1999-08-04 Device for displaying the power-reserve of a timepiece
US09/631,381 US6685352B1 (en) 1999-08-04 2000-08-03 Timepiece power reserve indicator device
JP2000236689A JP4671477B2 (en) 1999-08-04 2000-08-04 Clock power holding amount display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP99115389A EP1074897B1 (en) 1999-08-04 1999-08-04 Device for displaying the power-reserve of a timepiece

Publications (2)

Publication Number Publication Date
EP1074897A1 EP1074897A1 (en) 2001-02-07
EP1074897B1 true EP1074897B1 (en) 2009-04-15

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EP99115389A Expired - Lifetime EP1074897B1 (en) 1999-08-04 1999-08-04 Device for displaying the power-reserve of a timepiece

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US (1) US6685352B1 (en)
EP (1) EP1074897B1 (en)
JP (1) JP4671477B2 (en)
AT (1) ATE428958T1 (en)
DE (1) DE69940727D1 (en)
ES (1) ES2325232T3 (en)

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EP1074897A1 (en) 2001-02-07
DE69940727D1 (en) 2009-05-28
ES2325232T3 (en) 2009-08-28
JP2001074856A (en) 2001-03-23
US6685352B1 (en) 2004-02-03
ATE428958T1 (en) 2009-05-15
JP4671477B2 (en) 2011-04-20

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