EP1978420B1 - Gear wheel for a timepiece and device for correction of a display mechanism for a timepiece incorporating such a wheel - Google Patents

Gear wheel for a timepiece and device for correction of a display mechanism for a timepiece incorporating such a wheel Download PDF

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Publication number
EP1978420B1
EP1978420B1 EP07105669A EP07105669A EP1978420B1 EP 1978420 B1 EP1978420 B1 EP 1978420B1 EP 07105669 A EP07105669 A EP 07105669A EP 07105669 A EP07105669 A EP 07105669A EP 1978420 B1 EP1978420 B1 EP 1978420B1
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EP
European Patent Office
Prior art keywords
toothing
pitch
teeth
wheel
pinion
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.)
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Application number
EP07105669A
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German (de)
French (fr)
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EP1978420A1 (en
Inventor
Julien Chaignat
Marco Bettelini
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.)
ETA SA Manufacture Horlogere Suisse
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ETA SA Manufacture Horlogere Suisse
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
Priority to AT07105669T priority Critical patent/ATE487962T1/en
Application filed by ETA SA Manufacture Horlogere Suisse filed Critical ETA SA Manufacture Horlogere Suisse
Priority to EP07105669A priority patent/EP1978420B1/en
Priority to DE602007010423T priority patent/DE602007010423D1/en
Priority to JP2008079830A priority patent/JP5203003B2/en
Priority to SG200802381-4A priority patent/SG146583A1/en
Priority to US12/056,668 priority patent/US7957226B2/en
Priority to CN2008100905906A priority patent/CN101286038B/en
Publication of EP1978420A1 publication Critical patent/EP1978420A1/en
Priority to HK09103231.4A priority patent/HK1125188A1/en
Application granted granted Critical
Publication of EP1978420B1 publication Critical patent/EP1978420B1/en
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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
    • G04B19/00—Indicating the time by visual means
    • G04B19/24—Clocks or watches with date or week-day indicators, i.e. calendar clocks or watches; Clockwork calendars
    • G04B19/243—Clocks or watches with date or week-day indicators, i.e. calendar clocks or watches; Clockwork calendars characterised by the shape of the date indicator
    • G04B19/247—Clocks or watches with date or week-day indicators, i.e. calendar clocks or watches; Clockwork calendars characterised by the shape of the date indicator disc-shaped
    • G04B19/25—Devices for setting the date indicators manually
    • 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
    • G04B13/02—Wheels; Pinions; Spindles; Pivots
    • G04B13/027—Wheels; Pinions; Spindles; Pivots planar toothing: shape and design
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/19—Gearing
    • Y10T74/1987—Rotary bodies

Definitions

  • the present invention relates to the field of watchmaking. It relates more specifically to a correction device of a display mechanism of a time indication comprising a wheel provided with two sets of teeth lying in the same plane. The invention also relates to said wheel as such.
  • Mechanisms for displaying a time indication, such as a date are known to those skilled in the art. They typically comprise a display member, such as a date ring, a drive mechanism of this display member, and a correction device actuated by a winding stem.
  • the correction devices are generally complex and bulky. They typically comprise at least one idler wheel actuated by a pinion mounted on the winding stem, and a correcting, sliding or fixed gear, engaged with the idler wheel on the one hand, and the display member of somewhere else.
  • a major disadvantage of such a correction device is its thickness, mainly due to the return wheel which comprises two levels of teeth.
  • the return wheel which comprises two levels of teeth.
  • the document JP 59 160791 wherein the idler wheel includes a first gear level engaged with the winding pinion gear, and a second gear level engaged with a second idler gear.
  • the return wheel is arranged in overthickness of the pinion of the winding stem. It includes a singing toothing taken with this pinion, and a radial toothing meshing with the corrector pinion.
  • the correction gear also has two active levels. Because of their thickness, such devices are not suitable for ultra-thin movements.
  • the document JP 58 128556 further described a gear of a first wheel having a larger space than the pitch of the toothing between two successive and the toothed sector of the second wheel has a larger tooth than the other teeth of its toothing, the wider tooth being intended to cooperate with said space of the first wheel.
  • This arrangement is intended to prevent damage to the teeth during their mutual engagement; however, it does not allow the described wheel to solve the aforementioned thickness problems.
  • correction devices much simpler design, include a pinion mounted on the winding stem, in direct contact with a toothing of the display member.
  • the pinion comprises two substantially helical fins, arranged to cooperate in a direction of rotation only, with the toothing of the display member.
  • the display member is generally positioned using a jumper.
  • This type of correction device is certainly very simple, but it is bulky for significant display member diameters. Indeed, the diameter of the pinion must be related to the pitch of the toothing of the display member, so that each fin causes a step the display member when the pinion rotates. The diameter of the pinion is therefore all the more important that the diameter of the display member is large, which is why this device is not very suitable for ultrathin movements.
  • the present invention proposes to overcome these disadvantages by proposing a clockwork wheel according to claim 1 which is particularly suitable for a simple correction device and minimum space requirement, mainly in thickness.
  • a particular aspect of the invention relates to a device for correcting a display mechanism for a timepiece of the type comprising a display member provided with pitch teeth P, the correction device comprising a pinion provided with a notch p, mounted on a winding stem so as to occupy at least one correction position, and an intermediate wheel mounted between the pinion and the display member.
  • the intermediate wheel comprises a main pitch pitch P, of head diameter D, of foot diameter d1 in engagement with the pitch pitch P of the display member, and a secondary toothing of pitch less than P, concentric with the main toothing, situated in the same plane as the main toothing, with a head diameter D equal to the head diameter of the main toothing, and with a root diameter d2 greater than the root diameter d1 of the toothing main gear, engaged with the pitch gear p of the pinion when the pinion occupies the correction position.
  • the thickness of the correction device according to the invention does not exceed the diameter of the pinion.
  • the pinion is not in direct contact with the display member as is the case of the pinion fin described above, but with the second set of teeth p, its diameter and its size are found reduced.
  • the invention also relates to a clock wheel equipping this correction device.
  • the invention relates to a substantially flat watch wheel comprising a first set of teeth defined by a pitch P, a head diameter D, a foot diameter d1, comprising at least one tooth provided with a notch extending substantially angularly.
  • the crown portion of the first teeth is cut so as to form a second coplanar and concentric to the first set of teeth, discontinuous, defined by a pitch p less than the pitch P of the first toothing, a diameter of the head D equal to the head diameter of the first toothing, and a foot diameter d2 greater than the root diameter d1 of the first toothing.
  • the correction device represented on the figures 1 and 2 is intended to correct the display of a time indication provided by a display member 12.
  • the time indication is, for example, a date, a month, or a day of the week.
  • the display member 12 is furthermore rotatably mounted on a plate 18 and positioned angularly by means of a jumper 20.
  • a holding plate 22 partially covers the toothing 16 and is fixed to the plate 18, ensures its axial positioning.
  • a drive mechanism of the display member 12 is provided but not shown. It comprises, for example, in the case of a date, a date drive wheel operating a step per day the display member 12, driven by a clock wheel of the hours. Such a mechanism is conventional and will not be described further.
  • the correction device 10 conventionally comprises a winding stem 24 mounted to rotate in the plate 18, and provided at its outer end with a not shown winding crown.
  • the winding stem 24 is slidably mounted so as to occupy a neutral position, corresponding to its most recessed position, and two positions active, corresponding to a first and a second drawn positions.
  • a sliding pinion 26 is rotatably mounted on the winding stem 24.
  • the winding stem 24 has a square section on a portion occupied by the sliding pinion 26.
  • the sliding pinion 26 is itself provided with a hole adapted in shape and size to the section of the winding stem 24.
  • first right-corner toothing 28 and at a second end, a second edge toothing 30 of not p.
  • Said second toothing 30 is straight, but other forms of teeth can be envisaged, as it will appear later.
  • the sliding pinion 26 is actuated conventionally by a mechanism consisting of a pull tab 32 and a rocker 34 cooperating together to move it from a neutral position, when the winding stem 24 is in the neutral position, to a position at a correction position of the time indication A, when the winding stem 24 occupies a first drawn position, and then at a time-setting position B, when the winding stem 24 occupies the second drawn position.
  • This actuating mechanism of the sliding pinion 26 is well known to those skilled in the art and will not be described further.
  • the sliding pinion 26 meshes, by its first toothing 28, with a return wheel 36 kinematically connected to a roadway not shown.
  • the time setting can be performed by actuating the winding stem 24, in one direction of rotation, as in the other.
  • the sliding pinion 26 engages, by its second toothing 30, with a correction wheel 38 mounted free to rotate on the holding plate 22.
  • the correction wheel 38 is itself in engagement with the toothing 16 of the display member 12.
  • the assembly formed by the winding stem 24, the sliding pinion 26, the correction wheel 38 and the display member 12 is represented on the figure 3 in the position of correction of the indication of time A.
  • the characteristics of the correction wheel 38 appear in more detail in figure 4 .
  • the correction wheel 38 comprises a first set of teeth 40 of pitch P, of head diameter D, of foot diameter d1.
  • the toothing 40 meshes with the toothing 16 of the display member 12.
  • the teeth 42 further comprise two substantially radial flanks and an apex 44 extending substantially angularly.
  • the top 44 is cut so as to form a second toothing 46, discontinuous, coplanar and concentric with the first toothing 40, of pitch p less than the pitch P of the first toothing, of head diameter D equal to the head diameter of the first set of teeth.
  • toothing 40 and foot diameter d2 greater than the root diameter d1 of the first toothing 40.
  • the toothing 46 meshes with the edge toothing 30 of the sliding pinion 26.
  • the toothing 46 has significant discontinuities, because it is only present at the top 44 of the teeth 42 of the first toothing 40. It is necessary, however, for the correct operation of the correction device 10, that the second toothing 46 is always engaged, at least by means of a tooth, with the edge toothing 30 of the sliding pinion 26.
  • the spaces of width s separating two consecutive teeth 42 are as small as possible. In practice, they can not be less than the width s of the teeth 17 constituting the toothing 16 of the display member 12. It will therefore be ensured that the teeth 17 of the display member 12 are of a width s as low as possible.
  • the toothing 30 and the second toothing 46 are straight, which allows a coupling in both directions of rotation.
  • the toothing 30 and the second toothing 46 are sawed, so that the two teeth cooperate in a single direction of rotation, in the manner of two Breguet teeth.
  • the sliding pinion 26 and the correction wheel 38 then form a one-way coupling for correcting the display member in a single direction of rotation.
  • the correction device 10 thus described, is of great simplicity and compactness. It is ideally suited for ultra-thin movement, mechanical or electromechanical type.

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

Abstract

The wheel has a toothing (40) defined by a pitch (P), head diameter and foot diameter. Teeth (42) are provided with a tip portion that forms another toothing i.e. saw-shaped toothing, which is coplanar and concentric to the toothing (40). The head diameter of the saw-shaped toothing is equal to head diameter of the toothing (40). The foot diameter of the saw-shaped toothing is greater than the foot diameter of the toothing (40), where the two toothings allow coupling in different direction of rotation. An independent claim is also included for a correction device for a timepiece display mechanism, comprising a display member that is fitted with a toothing.

Description

La présente invention se rapporte au domaine de l'horlogerie. Elle concerne plus précisément un dispositif de correction d'un mécanisme d'affichage d'une indication de temps comportant une roue munie de deux dentures situées dans un même plan. L'invention concerne également ladite roue en tant que telle.The present invention relates to the field of watchmaking. It relates more specifically to a correction device of a display mechanism of a time indication comprising a wheel provided with two sets of teeth lying in the same plane. The invention also relates to said wheel as such.

Des mécanismes d'affichage d'une indication de temps, tel qu'un quantième, sont connus de l'homme de métier. Ils comportent typiquement un organe d'affichage, tel qu'un anneau de quantième, un mécanisme d'entraînement de cet organe d'affichage, et un dispositif de correction actionné par une tige de remontoir. Les dispositifs de correction sont généralement complexes et encombrants. Ils comprennent typiquement au moins une roue de renvoi actionnée par un pignon monté sur la tige de remontoir, et un pignon correcteur, baladeur ou fixe, en prise avec la roue de renvoi d'une part, et l'organe d'affichage d'autre part.Mechanisms for displaying a time indication, such as a date, are known to those skilled in the art. They typically comprise a display member, such as a date ring, a drive mechanism of this display member, and a correction device actuated by a winding stem. The correction devices are generally complex and bulky. They typically comprise at least one idler wheel actuated by a pinion mounted on the winding stem, and a correcting, sliding or fixed gear, engaged with the idler wheel on the one hand, and the display member of somewhere else.

Un inconvénient majeur d'un tel dispositif de correction, est son épaisseur, due principalement à la roue de renvoi qui comprend deux niveaux de dentures. On citera, à titre d'exemple, le document JP 59 160791 , dans lequel la roue de renvoi comprend un premier niveau de denture en prise avec le pignon de la tige de remontoir, et un deuxième niveau de denture en prise avec une deuxième roue de renvoi. Dans le document JP 48 35856 , la roue de renvoi est disposée en surépaisseur du pignon de la tige de remontoir. Elle comprend une denture de chant en prise avec ce pignon, et une denture radiale en prise avec le pignon correcteur. En outre, le pignon correcteur comporte également deux niveaux actifs. En raison de leur épaisseur, de tels dispositifs ne sont pas adaptés pour des mouvements ultra-minces.A major disadvantage of such a correction device is its thickness, mainly due to the return wheel which comprises two levels of teeth. As an example, the document JP 59 160791 wherein the idler wheel includes a first gear level engaged with the winding pinion gear, and a second gear level engaged with a second idler gear. In the document JP 48 35856 , the return wheel is arranged in overthickness of the pinion of the winding stem. It includes a singing toothing taken with this pinion, and a radial toothing meshing with the corrector pinion. In addition, the correction gear also has two active levels. Because of their thickness, such devices are not suitable for ultra-thin movements.

Le document JP 58 128556 décrit par ailleurs un engrenage d'une première roue présentant un espace plus grand que le pas de la denture entre deux successives et le secteur denté de la deuxième roue présente une dent plus large que les autres dents de sa denture, la dent plus large étant destinée à coopérer avec ledit espace de la première roue. Cet agencement a pour but d'éviter un endommagement des dents lors de leur engagement mutuel; il ne permet toutefois pas à la roue décrite de résoudre les problèmes d'épaisseur susmentionnés.The document JP 58 128556 further described a gear of a first wheel having a larger space than the pitch of the toothing between two successive and the toothed sector of the second wheel has a larger tooth than the other teeth of its toothing, the wider tooth being intended to cooperate with said space of the first wheel. This arrangement is intended to prevent damage to the teeth during their mutual engagement; however, it does not allow the described wheel to solve the aforementioned thickness problems.

D'autres dispositifs de correction, de conception beaucoup plus simple, comprennent un pignon monté sur la tige de remontoir, en prise directe avec une denture de l'organe d'affichage. A cet effet, le pignon comporte deux ailettes sensiblement hélicoïdales, agencées pour coopérer dans un sens de rotation seulement, avec la denture de l'organe d'affichage. L'organe d'affichage est généralement positionné à l'aide d'un sautoir. Ce type de dispositif de correction est certes d'une grande simplicité, mais il s'avère encombrant pour des diamètres d'organe d'affichage importants. En effet, le diamètre du pignon doit être en rapport avec le pas de la denture de l'organe d'affichage, afin que chaque ailette entraîne d'un pas l'organe d'affichage lorsque le pignon tourne. Le diamètre du pignon est, par conséquent d'autant plus important que le diamètre de l'organe d'affichage est grand, c'est pourquoi ce dispositif est peu adapté pour des mouvements ultraminces.Other correction devices, much simpler design, include a pinion mounted on the winding stem, in direct contact with a toothing of the display member. For this purpose, the pinion comprises two substantially helical fins, arranged to cooperate in a direction of rotation only, with the toothing of the display member. The display member is generally positioned using a jumper. This type of correction device is certainly very simple, but it is bulky for significant display member diameters. Indeed, the diameter of the pinion must be related to the pitch of the toothing of the display member, so that each fin causes a step the display member when the pinion rotates. The diameter of the pinion is therefore all the more important that the diameter of the display member is large, which is why this device is not very suitable for ultrathin movements.

La présente invention se propose de pallier ces inconvénients en proposant une roue d'horlogerie selon la revendication 1 qui est particulièrement adaptée à un dispositif de correction simple et d'encombrement minimum, principalement en épaisseur.The present invention proposes to overcome these disadvantages by proposing a clockwork wheel according to claim 1 which is particularly suitable for a simple correction device and minimum space requirement, mainly in thickness.

Plus précisément, un aspect particulier de l'invention concerne un dispositif de correction d'un mécanisme d'affichage pour pièce d'horlogerie du type comportant un organe d'affichage muni d'une denture de pas P, le dispositif de correction comprenant un pignon muni d'une denture de pas p, monté sur une tige de remontoir de manière à occuper au moins une position de correction, et une roue intermédiaire montée entre le pignon et l'organe d'affichage. Selon l'invention, la roue intermédiaire comprend une denture principale de pas P, de diamètre de tête D, de diamètre de pied d1 en prise avec la denture de pas P de l'organe d'affichage, et une denture secondaire de pas p inférieur à P, concentrique à la denture principale, située dans le même plan que la denture principale, de diamètre de tête D égal au diamètre de tête de la denture principale, et de diamètre de pied d2 supérieur au diamètre de pied d1 de la denture principale, en prise avec la denture de pas p du pignon lorsque le pignon occupe la position de correction.More specifically, a particular aspect of the invention relates to a device for correcting a display mechanism for a timepiece of the type comprising a display member provided with pitch teeth P, the correction device comprising a pinion provided with a notch p, mounted on a winding stem so as to occupy at least one correction position, and an intermediate wheel mounted between the pinion and the display member. According to the invention, the intermediate wheel comprises a main pitch pitch P, of head diameter D, of foot diameter d1 in engagement with the pitch pitch P of the display member, and a secondary toothing of pitch less than P, concentric with the main toothing, situated in the same plane as the main toothing, with a head diameter D equal to the head diameter of the main toothing, and with a root diameter d2 greater than the root diameter d1 of the toothing main gear, engaged with the pitch gear p of the pinion when the pinion occupies the correction position.

Grâce aux caractéristiques de la roue intermédiaire, l'épaisseur du dispositif de correction selon l'invention ne dépasse pas le diamètre du pignon. De plus, le pignon n'étant pas en prise directe avec l'organe d'affichage comme c'est le cas du pignon à ailettes décrit précédemment, mais avec la deuxième denture de pas p, son diamètre et son encombrement s'en trouvent réduits.Due to the characteristics of the intermediate wheel, the thickness of the correction device according to the invention does not exceed the diameter of the pinion. In addition, the pinion is not in direct contact with the display member as is the case of the pinion fin described above, but with the second set of teeth p, its diameter and its size are found reduced.

L'invention concerne également une roue d'horlogerie équipant ce dispositif de correction.The invention also relates to a clock wheel equipping this correction device.

Plus précisément, l'invention concerne une roue d'horlogerie sensiblement plane comprenant une première denture définie par un pas P, un diamètre de tête D, un diamètre de pied d1, comportant au moins une dent munie d'un sommet s'étendant sensiblement angulairement. Selon l'invention, la portion de sommet des premières dents est découpée de manière à former une deuxième denture coplanaire et concentrique à la première denture, discontinue, définie par un pas p inférieur au pas P de la première denture, un diamètre de tête D égal au diamètre de tête de la première denture, et un diamètre de pied d2 supérieur au diamètre de pied d1 de la première denture.More specifically, the invention relates to a substantially flat watch wheel comprising a first set of teeth defined by a pitch P, a head diameter D, a foot diameter d1, comprising at least one tooth provided with a notch extending substantially angularly. According to the invention, the crown portion of the first teeth is cut so as to form a second coplanar and concentric to the first set of teeth, discontinuous, defined by a pitch p less than the pitch P of the first toothing, a diameter of the head D equal to the head diameter of the first toothing, and a foot diameter d2 greater than the root diameter d1 of the first toothing.

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

  • les figures 1 et 2 sont des vues respectivement de dessus et en coupe d'un dispositif de correction d'un mécanisme d'affichage selon l'invention,
  • la figure 3 est une vue en perspective d'une partie du dispositif de correction selon l'invention,
  • la figure 4 représente une roue d'horlogerie équipant un tel dispositif, et
  • la figure 5 illustre une variante du dispositif de correction selon l'invention.
Other features and advantages of the present invention will become more apparent from the following detailed description of an example embodiment of a correction device of a display mechanism according to the invention, this example being given for purely illustrative and nonlimiting purposes only, in conjunction with the appended drawing in which:
  • the figures 1 and 2 are views respectively from above and in section of a correction device of a display mechanism according to the invention,
  • the figure 3 is a perspective view of a part of the correction device according to the invention,
  • the figure 4 represents a clock wheel equipping such a device, and
  • the figure 5 illustrates a variant of the correction device according to the invention.

Désigné par la référence générale 10, le dispositif de correction représenté sur les figures 1 et 2, est destiné à corriger l'affichage d'une indication de temps fournie par un organe d'affichage 12. L'indication de temps est, par exemple, un quantième, un mois, ou un jour de la semaine. L'organe d'affichage 12 est classiquement formé d'un anneau 14, sur lequel sont apposées des indications de temps. Il est muni d'une denture intérieure 16 de pas P, formée de dents 17 de largeur s, séparées par un espace de largeur S = P - s. L'organe d'affichage 12 est, en outre, monté guidé en rotation sur une platine 18, et positionné angulairement à l'aide d'un sautoir 20. Une plaque de maintien 22 recouvrant partiellement la denture 16, et fixée à la platine 18, assure son positionnement axial. Un mécanisme d'entraînement de l'organe d'affichage 12 est prévu mais non représenté. II comprend par exemple, dans le cas d'un quantième, une roue d'entraînement de quantième actionnant d'un pas par jour l'organe d'affichage 12, entraînée par une roue de renvoi des heures. Un tel mécanisme est classique et ne sera pas décrit davantage.Designated by the general reference 10, the correction device represented on the figures 1 and 2 , is intended to correct the display of a time indication provided by a display member 12. The time indication is, for example, a date, a month, or a day of the week. The display member 12 is conventionally formed of a ring 14, on which time indications are affixed. It is provided with internal teeth 16 of pitch P, formed of teeth 17 of width s, separated by a space of width S = P - s. The display member 12 is furthermore rotatably mounted on a plate 18 and positioned angularly by means of a jumper 20. A holding plate 22 partially covers the toothing 16 and is fixed to the plate 18, ensures its axial positioning. A drive mechanism of the display member 12 is provided but not shown. It comprises, for example, in the case of a date, a date drive wheel operating a step per day the display member 12, driven by a clock wheel of the hours. Such a mechanism is conventional and will not be described further.

Le dispositif de correction 10 comporte classiquement une tige de remontoir 24 montée mobile en rotation dans la platine 18, et munie, en son extrémité extérieure, d'une couronne de remontoir non représentée. La tige de remontoir 24 est montée coulissante de manière à occuper une position neutre, correspondant à sa position la plus enfoncée, et deux positions actives, correspondants à une première et une deuxième positions tirées. Un pignon coulant 26 est monté solidaire en rotation sur la tige de remontoir 24. A cet effet, la tige de remontoir 24 présente une section carrée sur une portion occupée par le pignon coulant 26. Le pignon coulant 26 est lui-même muni d'un trou adapté en forme et en dimension à la section de la tige de remontoir 24. II comporte, par ailleurs, en une première extrémité, une première denture de chant droite 28, et en une deuxième extrémité, une deuxième denture de chant 30 de pas p. Ladite deuxième denture de chant 30 est droite, mais d'autres formes de denture peuvent être envisagées, comme il apparaîtra par la suite.The correction device 10 conventionally comprises a winding stem 24 mounted to rotate in the plate 18, and provided at its outer end with a not shown winding crown. The winding stem 24 is slidably mounted so as to occupy a neutral position, corresponding to its most recessed position, and two positions active, corresponding to a first and a second drawn positions. A sliding pinion 26 is rotatably mounted on the winding stem 24. For this purpose, the winding stem 24 has a square section on a portion occupied by the sliding pinion 26. The sliding pinion 26 is itself provided with a hole adapted in shape and size to the section of the winding stem 24. It further comprises, at a first end, a first right-corner toothing 28, and at a second end, a second edge toothing 30 of not p. Said second toothing 30 is straight, but other forms of teeth can be envisaged, as it will appear later.

Le pignon coulant 26 est actionné classiquement par un mécanisme formé d'une tirette 32 et d'une bascule 34 coopérant ensemble pour le faire passer d'une position neutre, lorsque la tige de remontoir 24 est en position neutre, à une position à une position de correction de l'indication de temps A, lorsque la tige de remontoir 24 occupe une première position tirée, puis à une position de mise à l'heure B, lorsque la tige de remontoir 24 occupe la deuxième position tirée. Ce mécanisme d'actionnement du pignon coulant 26 est bien connu de l'homme de métier et ne sera pas décrit plus avant.The sliding pinion 26 is actuated conventionally by a mechanism consisting of a pull tab 32 and a rocker 34 cooperating together to move it from a neutral position, when the winding stem 24 is in the neutral position, to a position at a correction position of the time indication A, when the winding stem 24 occupies a first drawn position, and then at a time-setting position B, when the winding stem 24 occupies the second drawn position. This actuating mechanism of the sliding pinion 26 is well known to those skilled in the art and will not be described further.

En position de mise à l'heure B, le pignon coulant 26 engrène, par sa première denture 28, avec une roue de renvoi 36 reliée cinématiquement à une chaussée non représentée. La mise à l'heure peut être effectuée en actionnant la tige de remontoir 24, dans un sens de rotation, comme dans l'autre.In setting position B, the sliding pinion 26 meshes, by its first toothing 28, with a return wheel 36 kinematically connected to a roadway not shown. The time setting can be performed by actuating the winding stem 24, in one direction of rotation, as in the other.

En position de correction de l'indication de temps A, le pignon coulant 26 engrène, par sa deuxième denture 30, avec une roue de correction 38 montée libre en rotation sur la plaque de maintien 22. La roue de correction 38 est elle-même en prise avec la denture 16 de l'organe d'affichage 12. L'ensemble formé par la tige de remontoir 24, le pignon coulant 26, la roue de correction 38 et l'organe d'affichage 12 est représenté sur la figure 3, en position de correction de l'indication de temps A. Les caractéristiques de la roue de correction 38 apparaissent plus en détail en figure 4.In the position of correction of the indication of time A, the sliding pinion 26 engages, by its second toothing 30, with a correction wheel 38 mounted free to rotate on the holding plate 22. The correction wheel 38 is itself in engagement with the toothing 16 of the display member 12. The assembly formed by the winding stem 24, the sliding pinion 26, the correction wheel 38 and the display member 12 is represented on the figure 3 in the position of correction of the indication of time A. The characteristics of the correction wheel 38 appear in more detail in figure 4 .

La roue de correction 38 comporte une première denture 40 de pas P, de diamètre de tête D, de diamètre de pied d1. La denture 40 engrène avec la denture 16 de l'organe d'affichage 12. A cet effet, la denture 40 est sensiblement complémentaire de la denture 16. Elle est formée de dents 42, de largeur S, égale à la largeur de l'espace entre deux dents consécutives 17, séparées par un espace de largeur s = P - S, égale à la largeur des dents 17.The correction wheel 38 comprises a first set of teeth 40 of pitch P, of head diameter D, of foot diameter d1. The toothing 40 meshes with the toothing 16 of the display member 12. For this purpose, the toothing 40 is substantially complementary to the toothing 16. It is formed of teeth 42, of width S, equal to the width of the space between two consecutive teeth 17, separated by a space of width s = P - S, equal to the width of the teeth 17.

Les dents 42 comportent, en outre, deux flancs sensiblement radiaux et un sommet 44 s'étendant sensiblement angulairement. Le sommet 44 est découpé de manière à former une deuxième denture 46, discontinue, coplanaire et concentrique à la première denture 40, de pas p inférieur au pas P de la première denture, de diamètre de tête D égal au diamètre de tête de la première denture 40 et de diamètre de pied d2 supérieur au diamètre de pied d1 de la première denture 40. La denture 46 engrène avec la denture de chant 30 du pignon coulant 26.The teeth 42 further comprise two substantially radial flanks and an apex 44 extending substantially angularly. The top 44 is cut so as to form a second toothing 46, discontinuous, coplanar and concentric with the first toothing 40, of pitch p less than the pitch P of the first toothing, of head diameter D equal to the head diameter of the first set of teeth. toothing 40 and foot diameter d2 greater than the root diameter d1 of the first toothing 40. The toothing 46 meshes with the edge toothing 30 of the sliding pinion 26.

On notera que la denture 46 présente des discontinuités importantes, du fait qu'elle n'est présente qu'au sommet 44 des dents 42 de la première denture 40. Il est nécessaire, toutefois, pour le bon fonctionnement du dispositif de correction 10, que la deuxième denture 46 soit toujours en prise, au moins par l'intermédiaire d'une dent, avec la denture de chant 30 du pignon coulant 26. A cet effet, les espaces de largeur s séparant deux dents 42 consécutives sont aussi faibles que possible. En pratique, ils ne peuvent être inférieurs à la largeur s des dents 17 constituant la denture 16 de l'organe d'affichage 12. On veillera par conséquent à ce que les dents 17 de l'organe d'affichage 12 soient d'une largeur s aussi faible que possible.Note that the toothing 46 has significant discontinuities, because it is only present at the top 44 of the teeth 42 of the first toothing 40. It is necessary, however, for the correct operation of the correction device 10, that the second toothing 46 is always engaged, at least by means of a tooth, with the edge toothing 30 of the sliding pinion 26. For this purpose, the spaces of width s separating two consecutive teeth 42 are as small as possible. In practice, they can not be less than the width s of the teeth 17 constituting the toothing 16 of the display member 12. It will therefore be ensured that the teeth 17 of the display member 12 are of a width s as low as possible.

Lorsque la tige de remontoir 24 est actionnée, le pignon coulant 26 étant en position A, celui-ci entraîne en rotation la roue de correction 38, qui elle-même entraîne l'organe d'affichage 12, dans un sens de rotation ou l'autre. L'indication de temps est ainsi corrigée.When the winding stem 24 is actuated, the sliding pinion 26 being in position A, the latter rotates the correction wheel 38, which itself drives the display member 12, in a direction of rotation or rotation. 'other. The time indication is thus corrected.

Dans le mode de réalisation présenté ci-dessus, la denture de chant 30 et la deuxième denture 46 sont droites, ce qui permet un accouplement dans les deux sens de rotation. Dans un mode de réalisation particulier illustré en figure 5, la denture de chant 30 et la deuxième denture 46 sont en scie, de sorte que les deux dentures coopèrent dans un unique sens de rotation, à la manière de deux dentures Breguet. Le pignon coulant 26 et la roue de correction 38 forment alors un accouplement à sens unique destiné à corriger l'organe d'affichage dans un seul sens de rotation. Pour plus de précisions sur le mode de fonctionnement d'un tel accouplement, on se référera à la demande déposée le 03 avril 2007, au nom de ETA S.A., et intitulée 'Accouplement à sens unique et dispositif de correction comportant un tel accouplement'.In the embodiment presented above, the toothing 30 and the second toothing 46 are straight, which allows a coupling in both directions of rotation. In a particular embodiment illustrated in figure 5 , the toothing 30 and the second toothing 46 are sawed, so that the two teeth cooperate in a single direction of rotation, in the manner of two Breguet teeth. The sliding pinion 26 and the correction wheel 38 then form a one-way coupling for correcting the display member in a single direction of rotation. For more details on the mode of operation of such a coupling, reference will be made to the application filed on April 3, 2007, in the name of ETA SA, entitled 'One-way coupling and correction device comprising such a coupling'.

Le dispositif de correction 10 ainsi décrit, est d'une grande simplicité et d'un encombrement minimum. II convient parfaitement à un mouvement ultraplat, de type mécanique ou électromécanique.The correction device 10 thus described, is of great simplicity and compactness. It is ideally suited for ultra-thin movement, mechanical or electromechanical type.

II va de soi que la présente invention n'est pas limitée aux modes de réalisations qui viennent d'être décrits, et que diverses modifications et variantes simples peuvent être envisagées par l'homme de métier, sans sortir du cadre de la présente invention telle que définie par les revendications annexées. On notera en particulier qu'une roue de correction 38 ne comportant qu'une seule dent 42 dont une portion de sommet 44 s'étend angulairement et est découpée de manière à former une deuxième denture 46 coplanaire et concentrique à la première, ne sort pas du cadre de la présente invention, comme définie par les revendications.It goes without saying that the present invention is not limited to the embodiments which have just been described, and that various simple modifications and variants can be envisaged by those skilled in the art, without departing from the scope of the present invention such as as defined by the appended claims. It will be noted in particular that a correction wheel 38 having only one tooth 42, a portion of vertex 44 extends angularly and is cut so as to form a second set of teeth 46 coplanar and concentric with the first, do not leave within the scope of the present invention as defined by the claims.

Claims (10)

  1. Substantially plane timepiece wheel (38) including a first toothing (40) defined by a pitch P, a head diameter D, a foot diameter d1, including a plurality of teeth (42) each provided with a tip (44) at least one portion of which extends substantially angularly, characterized in that said tip portion (44) is cut so as to form a second toothing (46), also comprising a plurality of teeth, that is coplanar and concentric to said first toothing (40), defined by a pitch p less than the pitch P of said first toothing (40), a head diameter D equal to the head diameter of the first toothing (40), and a foot diameter d2 that is greater than the foot diameter d1 of the first toothing (40).
  2. Timepiece wheel according to claim 1, characterized in that said first toothing (40) is formed of teeth (42) provided with a tip (44) extending substantially angularly, and in that said tip (44) is cut so as to form a second discontinuous toothing (46) that is coplanar and concentric to said first toothing (40), defined by a pitch p less than the pitch P of the first toothing (40), a head diameter D equal to the head diameter of the first toothing (40), and a foot diameter d2 greater than the foot diameter d1 of the first toothing (40).
  3. Timepiece wheel according to claim 1, characterized in that the pitch P is a multiple of the pitch p.
  4. Timepiece wheel according to any of claims 1 and 2, characterized in that said second toothing (46) is a saw-shaped toothing.
  5. Timepiece wheel according to any of claims 1 and 2, characterized in that said second toothing (46) is straight.
  6. Timepiece wheel according to any of claims 1 to 4, characterized in that said teeth (42) have a width S, separated by a space of width s, said width S of the teeth (42) being large relative to the width s of the space separating two teeth (42).
  7. Correction device (10) for a timepiece display mechanism of the type including a display member (12) fitted with a toothing (16) of pitch P, said correction device (10) including a pinion (26) provided with a toothing (30) of pitch p, mounted on a winding stem (24) so as to occupy at least one display correcting position A, and a correction wheel (38) according to one of the claims 1 to 6 mounted between said pinion (26) and said display member (12).
  8. Correction device (10) according to claim 7, characterized in that said pinion (26) is slidably mounted between a time-setting position B and said display correcting position A.
  9. Correction device (10) according to claim 8, characterized in that it includes means (32, 34) for tipping said pinion (26) from said time-setting position B to said display correcting position A and vice versa.
  10. Correction device (10) according to any of claims 7 to 9, characterized in that said toothing (30) of said pinion (26) and said second toothing (46) of said correction wheel (38) are saw shape toothings
EP07105669A 2007-04-04 2007-04-04 Gear wheel for a timepiece and device for correction of a display mechanism for a timepiece incorporating such a wheel Active EP1978420B1 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
EP07105669A EP1978420B1 (en) 2007-04-04 2007-04-04 Gear wheel for a timepiece and device for correction of a display mechanism for a timepiece incorporating such a wheel
DE602007010423T DE602007010423D1 (en) 2007-04-04 2007-04-04 Gear for clockwork and device for correcting a display mechanism for a clock with such a gear
AT07105669T ATE487962T1 (en) 2007-04-04 2007-04-04 GEAR FOR A CLOCK MOVEMENT AND DEVICE FOR CORRECTING A DISPLAY MECHANISM FOR A WATCH HAVING SUCH A GEAR
SG200802381-4A SG146583A1 (en) 2007-04-04 2008-03-26 Correction device for timepiece display mechanism and wheel fitted thereto
JP2008079830A JP5203003B2 (en) 2007-04-04 2008-03-26 Device for correcting the display mechanism of a watch and gears suitable for the device
US12/056,668 US7957226B2 (en) 2007-04-04 2008-03-27 Correction device for timepiece display mechanism and wheel fitted thereto
CN2008100905906A CN101286038B (en) 2007-04-04 2008-04-03 Device for correction of a display mechanism for a timepiece and wheel equipping such a device
HK09103231.4A HK1125188A1 (en) 2007-04-04 2009-04-06 Correction device for timepiece display mechanism and wheel fitted thereto

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07105669A EP1978420B1 (en) 2007-04-04 2007-04-04 Gear wheel for a timepiece and device for correction of a display mechanism for a timepiece incorporating such a wheel

Publications (2)

Publication Number Publication Date
EP1978420A1 EP1978420A1 (en) 2008-10-08
EP1978420B1 true EP1978420B1 (en) 2010-11-10

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EP07105669A Active EP1978420B1 (en) 2007-04-04 2007-04-04 Gear wheel for a timepiece and device for correction of a display mechanism for a timepiece incorporating such a wheel

Country Status (8)

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US (1) US7957226B2 (en)
EP (1) EP1978420B1 (en)
JP (1) JP5203003B2 (en)
CN (1) CN101286038B (en)
AT (1) ATE487962T1 (en)
DE (1) DE602007010423D1 (en)
HK (1) HK1125188A1 (en)
SG (1) SG146583A1 (en)

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EP2124112A1 (en) * 2008-05-22 2009-11-25 CT Time S.A. Timepiece mechanism and module comprising such a mechanism
EP2428855B1 (en) * 2010-09-08 2019-07-03 Rolex S.A. Clock piece fitted with a device for displaying predetermined time periods
CN103425038B (en) * 2013-08-17 2015-11-04 吴中一 Watch movement intermediate date wheel structure
JP6510781B2 (en) * 2014-09-12 2019-05-08 セイコーインスツル株式会社 Gear body, time difference correction mechanism, movement for watch and watch
EP3144743B1 (en) * 2015-09-15 2018-03-14 ETA SA Manufacture Horlogère Suisse Clock movement comprising a mechanism for correcting the date
EP3460586B1 (en) * 2017-09-22 2022-04-06 Montres Breguet S.A. Device for winding and/or immobilising a marine chronometer
CN112286030B (en) * 2020-12-04 2021-08-17 深圳穿金戴银科技股份有限公司 Watch time adjusting structure, watch time adjusting structure assembling method and time adjusting watch

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Also Published As

Publication number Publication date
SG146583A1 (en) 2008-10-30
HK1125188A1 (en) 2009-07-31
CN101286038A (en) 2008-10-15
EP1978420A1 (en) 2008-10-08
US7957226B2 (en) 2011-06-07
JP5203003B2 (en) 2013-06-05
CN101286038B (en) 2012-02-01
JP2008256687A (en) 2008-10-23
ATE487962T1 (en) 2010-11-15
US20080247277A1 (en) 2008-10-09
DE602007010423D1 (en) 2010-12-23

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