EP3729204B1 - Timepiece comprising a device for attaching a dial - Google Patents

Timepiece comprising a device for attaching a dial Download PDF

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Publication number
EP3729204B1
EP3729204B1 EP18815697.0A EP18815697A EP3729204B1 EP 3729204 B1 EP3729204 B1 EP 3729204B1 EP 18815697 A EP18815697 A EP 18815697A EP 3729204 B1 EP3729204 B1 EP 3729204B1
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EP
European Patent Office
Prior art keywords
dial
support
timepiece according
central opening
tube
Prior art date
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EP18815697.0A
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German (de)
French (fr)
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EP3729204A1 (en
Inventor
Raphaël Balmer
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ETA SA Manufacture Horlogere Suisse
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ETA SA Manufacture Horlogere Suisse
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Publication of EP3729204A1 publication Critical patent/EP3729204A1/en
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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
    • G04B19/00—Indicating the time by visual means
    • G04B19/06—Dials
    • G04B19/14—Fastening the dials to the clock or watch plates

Definitions

  • the present invention relates to the field of watchmaking and more particularly to a timepiece comprising a device for fixing a dial of the conventional type or of the type comprising a solar cell.
  • the document JP 2013 096818 A discloses a timepiece according to the preamble of claim 1.
  • a dial of a timepiece comprises on the side of the lower face, that is to say on the side of the movement, metal feet arranged to be partially driven into holes machined in the plate of the movement. . These metal feet serve in particular to hold the dial in place with respect to the movement of the watch during assembly of the latter.
  • Fixing the dial in the movement plate according to the aforementioned method has the disadvantage of involving relatively complex machining operations, the dial having to be drilled several times with precision before mounting the metal feet.
  • the use of such dials in watches of the skeleton type proves, moreover, to be unattractive.
  • an object of the invention is to overcome the various aforementioned drawbacks. More specifically, an object of the invention is to provide a timepiece comprising a dial fixing device which is simple to implement and which ensures good maintenance of the dial while guaranteeing mechanical resistance, in particular in the event of shocks along the axis of the needles.
  • the retaining member is arranged/disposed/located between the retaining tube, and the dial and/or a dial support while resting against a part of the dial adjacent to the central opening of the dial and/or against the dial support.
  • the retaining member is configured to bear or to exert an axial stress distributed either on an annular zone of the dial which is adjacent and concentric with the central opening of the dial, or on an annular zone of the dial support .
  • the part of the dial adjacent to the central opening of the dial defines an annular zone, preferably recessed with respect to the surface of the dial, so that a surface of the upper part of the tube of hold is at the same level as the dial.
  • the holding tube comprises a first cylindrical part having a first diameter and a second cylindrical part having a second diameter less than the first diameter.
  • the retaining member is a washer arranged on the circumference of the second cylindrical part and resting against the annular zone of the dial or against the dial support so as to exert an axial force on the dial or the dial support.
  • the retaining member is an elastic ring, preferably of the circlip type, arranged inside a groove made on at least part of the outer circumference of the retaining tube so that the elastic ring bears against the annular zone of the dial or against the dial support.
  • the holding tube comprises, on the one hand, a first tube mechanically connected to the motor module and comprising a threaded part on its internal circumference, and on the other hand, a second tube in the form of a screw screwed into the threaded part of the first tube.
  • the screw has a radial extension to form a circular bearing surface.
  • the retaining member is in the form of a joint, preferably of the O-ring type, arranged against the circular support surface of the screw and the annular zone of the dial or the support the dial support so as to exert an axial force on the dial or the dial support.
  • the screw is embedded in the central opening of the dial.
  • the screw comprises a raised part with respect to the dial and which extends radially in order to cover the central opening of the dial.
  • the timepiece further comprises a movement support and a circuit support arranged between the dial support and the motor module.
  • the stacking of each support forms a rigid base preventing deformation of the dial in the event of an axial impact.
  • each support has a central opening to form a housing inside which is fitted, at least in part, the retaining tube.
  • the dial includes or consists of at least one solar cell.
  • the device for fixing a dial according to the invention described below can be put in work in mechanical or quartz watches comprising a dial of the conventional/classic type, that is to say a dial comprising, for example, indexes distributed at regular intervals around the peripheral of the dial, figures to represent the hours, for example in the form of appliques fixed on the dial and, depending on the caliber, one or more apertures to indicate, for example, the date or other information.
  • the device for fixing a dial according to the invention can also be implemented in watches comprising a dial of the non-conventional type.
  • the fixing device according to the invention is, for example, particularly well suited for fixing a dial comprising or consisting of a solar cell to power, for example, a battery and/or an electronic module of a so-called smart watch.
  • the dial fixing device 12 comprises a retaining tube 15 arranged around the hour barrel 14b and is mechanically connected to the motor module 10, for example by hooking and this via a radial extension 18.
  • this device fixing also comprises a retainer 20a to 20c.
  • This retainer 20a to 20c is an added piece.
  • Such a retaining member 20a to 20c is a part which is preferably flexible and/or deformable intended to be arranged between a second cylindrical part 15b of a retaining tube 15, and the dial 12 or the dial support 17 of the watch.
  • the timepiece comprises in particular a motor module 10, the dial 12 provided with a central opening 13, a floor 14a and an hour barrel 14b passing through the central opening 13 of dial 12 and driven in rotation by the motor module 10.
  • the dial 12 is fixed on a dial support 17 for example by means of a double-sided adhesive 30a.
  • the shape of the dial support 17 is substantially identical to the shape of the dial 12.
  • the dial support 17 is mounted on a movement support 26, which is fixed to a circuit support, preferably a printed circuit support 28, by example by means of a double-sided adhesive 30b.
  • the stack of different supports 17, 26, 28 form a rigid base on which the dial 12 rests, which has the advantage of avoiding deformation of the dial 12 in the event of an axial impact.
  • This rigid base is particularly well suited for a dial 12 formed in particular of a solar cell in order to avoid any breakage of the glass substrate of the cell in the event of a major axial impact.
  • the timepiece comprises the dial fixing device 12 comprising the retaining member 20a, the retaining tube 15 arranged around the hour barrel 14b and thus mechanically connected to the motor module 10.
  • the holding tube 15 comprises a first cylindrical part 15a having a first diameter D1 and a second cylindrical part 15b having a second diameter D2 smaller than the first diameter D1.
  • the first cylindrical part 15a is housed in a tubular portion formed by the stacking of the central openings of the dial support 17, of the movement support 26 and of the printed circuit support 28.
  • This retaining member 20a comprises a retaining washer 20a and is arranged on the circumference of the second cylindrical part 15b.
  • This retaining washer 20a extends radially so that its periphery bears against the dial support 17 in order to exert an axial force on the dial support 17.
  • One end of the first cylindrical part 15a comprises the extension radial 18, for example of annular shape, which is fixed or mechanically connected to a bridge 10a of the motor module 10.
  • the retainer 20b comprises an elastic ring 20b.
  • This elastic ring 20b is arranged inside a groove 22 made on the outer circumference of the retaining tube 15 so that the elastic ring 20b bears against the dial support 17.
  • the elastic ring can for example be of the circlip type in order to facilitate the dismantling of the fastening device.
  • the retaining tube 15 is housed in the tubular portion formed by the stacking of the various supports 17, 26, 28 in order to produce this rigid base suitable for a dial 12 comprising or consisting of a solar cell.
  • One end of the retaining tube 15 comprises the radial extension 18, for example of annular shape, which is fixed to a bridge 10a of the motor module 10.
  • the retaining tube 15 comprises a first tube 16a comprising, on the one hand, a radial extension fixed to a bridge 10a of the motor module 10, and on the other hand, a threaded portion on its inner circumference.
  • the first tube 16a is housed in the tubular portion formed by the stacking of the various supports 17, 26, 28 producing this rigid base.
  • the retaining tube 15 further comprises a second tube 16b in the form of a screw screwed into the threaded part of the first tube 16a.
  • the screw 16b has at one end a radial extension 24 in order to form a circular bearing surface 24a.
  • the retainer 20c comprises a seal 20c, for example of the O-ring type.
  • This seal 20c is arranged against the circular bearing surface 24a of the screw 16b and the dial support 17 so as to exert an axial force on the dial support 17.
  • the screw 16b is embedded in the central opening 13 of the dial 12.
  • the diameter of the radial extension 24 is preferably substantially identical to the diameter of the central opening 13 of the dial in order to have an advantageous aesthetic appearance.
  • the retaining member 20c of the fixing device comprises seal 20c which is arranged against the circular bearing surface 24a of the screw 16b and the dial support 17. Under these conditions the radial extension 24 forming a surface circular support 24a defined at the end of said screw 16b is then capable of directly exerting an axial force on the dial support 17 via the retainer 20c.
  • the dial fixing device comprises a holding tube of construction similar to the third embodiment except that the screw 16b comprises a raised part 32 with respect to the dial 12 which extends radially in order to cover the central opening 13 of the dial 12.
  • This embodiment is particularly suitable for a dial comprising or consisting of a solar cell since the raised part 32 has the advantage of hiding the cutting defects of the solar cell.
  • the retaining washer 20a according to the figure 1 , the circlip 20b according to picture 2 as well as the second tube 16b in the form of a screw screwed into the threaded part of the first tube 16a according to the figures 3 and 4 all have the advantage of preventing the needles from coming out in the event of a major axial impact.
  • the retaining tube 15 can be adapted to rest on or exert an axial stress not on the dial support 17 but directly on the dial 12 itself or even directly on both the dial support 17 and the dial 12.
  • the dial 12 can for example comprise a dial part adjacent to the central opening 13 of the dial against which the retaining member such as the retaining washer 20a, the circlip 20b or the seal 20c according to the embodiment chosen from those described above.
  • the part dial adjacent to the central opening 13 can define an annular area set back from the greater part of the surface of the dial so that a surface of the upper part of the support tube is at the same level as the dial.
  • the fixing device according to the invention has the advantage of making it possible to produce dials in different materials which are not compatible for the manufacture of foot dials. These dials can be obtained in particular by plastic, metal or glass injection processes.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
  • Electric Clocks (AREA)

Description

Domaine techniqueTechnical area

La présente invention se rapporte au domaine de l'horlogerie et plus particulièrement à une pièce d'horlogerie comportant un dispositif de fixation d'un cadran de type classique ou de type comportant une cellule solaire.The present invention relates to the field of watchmaking and more particularly to a timepiece comprising a device for fixing a dial of the conventional type or of the type comprising a solar cell.

Arrière-plan technologiqueTechnology background

Le document JP 2013 096818 A divulgue une pièce d'horlogerie selon le préambule de la revendication 1.The document JP 2013 096818 A discloses a timepiece according to the preamble of claim 1.

De manière conventionnelle, un cadran d'une pièce d'horlogerie comporte du côté de la face inférieure, c'est-à-dire du côté mouvement, des pieds métalliques agencés pour être chassés en partie dans des trous usinés dans la platine du mouvement. Ces pieds métalliques servent notamment à maintenir en place le cadran par rapport au mouvement de la montre lors de l'assemblage de cette dernière. La fixation du cadran dans la platine de mouvement selon le procédé susvisé à l'inconvénient d'impliquer des opérations d'usinage relativement complexes, le cadran devant être percé plusieurs fois avec précision avant montage des pieds métalliques. Par ailleurs, en cas de chocs importants, il y a toujours un risque de rupture des pieds du cadran. L'utilisation de tels cadrans dans les montres de type squelette se révèle de surcroît peu esthétique.Conventionally, a dial of a timepiece comprises on the side of the lower face, that is to say on the side of the movement, metal feet arranged to be partially driven into holes machined in the plate of the movement. . These metal feet serve in particular to hold the dial in place with respect to the movement of the watch during assembly of the latter. Fixing the dial in the movement plate according to the aforementioned method has the disadvantage of involving relatively complex machining operations, the dial having to be drilled several times with precision before mounting the metal feet. Moreover, in the event of major shocks, there is always a risk of breaking the feet of the dial. The use of such dials in watches of the skeleton type proves, moreover, to be unattractive.

Résumé de l'inventionSummary of the invention

La présente invention a par conséquent pour but de pallier les différents inconvénients susvisés. Plus précisément, un objectif de l'invention est de proposer une pièce d'horlogerie comportant un dispositif de fixation du cadran qui soit simple à mettre en oeuvre et qui assure un bon maintien du cadran tout en garantissant une résistance mécanique notamment en cas de chocs selon l'axe des aiguilles.The object of the present invention is therefore to overcome the various aforementioned drawbacks. More specifically, an object of the invention is to provide a timepiece comprising a dial fixing device which is simple to implement and which ensures good maintenance of the dial while guaranteeing mechanical resistance, in particular in the event of shocks along the axis of the needles.

A cet effet, il est proposé une pièce d'horlogerie comportant un module moteur, un cadran comportant une ouverture centrale, un canon des heures traversant l'ouverture centrale du cadran et entrainé en rotation par le module moteur et un dispositif de fixation du cadran. Le dispositif de fixation comporte I :

  • un tube de maintien agencé autour du canon des heures et relié mécaniquement/solidaire au module moteur, et
  • un organe de retenue agencé entre le tube de maintien et le cadran et/ou un support de cadran sur lequel est fixé le cadran.
To this end, a timepiece is proposed comprising a motor module, a dial comprising a central opening, an hour barrel passing through the central opening of the dial and driven in rotation by the motor module and a device for fixing the dial . The fixing device comprises I:
  • a holding tube arranged around the hour barrel and mechanically connected/fixed to the motor module, and
  • a retaining member arranged between the retaining tube and the dial and/or a dial support on which the dial is fixed.

Selon une forme de réalisation, l'organe de retenue est agencé/disposé/situé entre le tube de maintien, et le cadran et/ou un support de cadran en étant en appui contre une partie du cadran adjacente à l'ouverture centrale du cadran et/ou contre le support de cadran. De préférence, l'organe de retenue est configuré pour être en appui ou pour exercer une contrainte axiale repartie soit sur une zone annulaire du cadran qui est adjacente et concentrique à l'ouverture centrale du cadran, soit sur une zone annulaire du support de cadran.According to one embodiment, the retaining member is arranged/disposed/located between the retaining tube, and the dial and/or a dial support while resting against a part of the dial adjacent to the central opening of the dial and/or against the dial support. Preferably, the retaining member is configured to bear or to exert an axial stress distributed either on an annular zone of the dial which is adjacent and concentric with the central opening of the dial, or on an annular zone of the dial support .

Selon une forme de réalisation, la partie du cadran adjacente à l'ouverture centrale du cadran définit une zone annulaire, de préférence en retrait par rapport à la surface du cadran, de sorte à ce qu'une surface de la partie supérieure du tube de maintien soit au même niveau que le cadran.According to one embodiment, the part of the dial adjacent to the central opening of the dial defines an annular zone, preferably recessed with respect to the surface of the dial, so that a surface of the upper part of the tube of hold is at the same level as the dial.

Selon une forme de réalisation, le tube de maintien comporte une première partie cylindrique possédant un premier diamètre et une seconde partie cylindrique possédant un second diamètre inférieur au premier diamètre. L'organe de retenue est une rondelle agencée sur la circonférence de la seconde partie cylindrique et en appui contre la zone annulaire du cadran ou contre le support de cadran de sorte à exercer une force axiale sur le cadran ou le support de cadran.According to one embodiment, the holding tube comprises a first cylindrical part having a first diameter and a second cylindrical part having a second diameter less than the first diameter. The retaining member is a washer arranged on the circumference of the second cylindrical part and resting against the annular zone of the dial or against the dial support so as to exert an axial force on the dial or the dial support.

Selon une forme de réalisation, l'organe de retenue est un anneau élastique, de préférence de type circlip, agencé à l'intérieur d'une gorge réalisée sur au moins une partie de la circonférence externe du tube de maintien de sorte à ce que l'anneau élastique soit en appui contre la zone annulaire du cadran ou contre le support de cadran.According to one embodiment, the retaining member is an elastic ring, preferably of the circlip type, arranged inside a groove made on at least part of the outer circumference of the retaining tube so that the elastic ring bears against the annular zone of the dial or against the dial support.

Selon une forme de réalisation, le tube de maintien comprend, d'une part, un premier tube relié mécaniquement au module moteur et comportant une partie filetée sur sa circonférence interne, et d'autre part, un second tube sous la forme d'une vis vissée dans la partie filetée du premier tube. La vis comporte une extension radiale afin de former une surface d'appui circulaire. L'organe de retenue est sous la forme d'un joint, de préférence de type O-ring, agencé contre la surface d'appui circulaire de la vis et la zone annulaire du cadran ou le support le support de cadran de sorte à exercer une force axiale sur le cadran ou le support de cadran.According to one embodiment, the holding tube comprises, on the one hand, a first tube mechanically connected to the motor module and comprising a threaded part on its internal circumference, and on the other hand, a second tube in the form of a screw screwed into the threaded part of the first tube. The screw has a radial extension to form a circular bearing surface. The retaining member is in the form of a joint, preferably of the O-ring type, arranged against the circular support surface of the screw and the annular zone of the dial or the support the dial support so as to exert an axial force on the dial or the dial support.

Selon une forme de réalisation, la vis est noyée dans l'ouverture centrale du cadran.According to one embodiment, the screw is embedded in the central opening of the dial.

Selon une forme de réalisation, la vis comporte une partie surélevée par rapport au cadran et qui s'étend radialement afin de recouvrir l'ouverture centrale du cadran.According to one embodiment, the screw comprises a raised part with respect to the dial and which extends radially in order to cover the central opening of the dial.

Selon une forme de réalisation, la pièce d'horlogerie comporte en outre un support de mouvement et un support de circuit agencés entre le support de cadran et le module moteur. L'empilement de chaque support forme une base rigide empêchant la déformation du cadran en cas de choc axial.According to one embodiment, the timepiece further comprises a movement support and a circuit support arranged between the dial support and the motor module. The stacking of each support forms a rigid base preventing deformation of the dial in the event of an axial impact.

Selon une forme de réalisation, chaque support comporte une ouverture centrale afin de former un logement à l'intérieur duquel est ajusté, du moins en partie, le tube de maintien.According to one embodiment, each support has a central opening to form a housing inside which is fitted, at least in part, the retaining tube.

Selon une forme de réalisation, le cadran comporte ou est constitué d'au moins une cellule solaire.According to one embodiment, the dial includes or consists of at least one solar cell.

Brève description des figuresBrief description of figures

D'autres caractéristiques et avantages de la présente invention apparaîtrons à la lecture de plusieurs formes de réalisation données uniquement à titre d'exemples non limitatifs et faites en référence aux dessins annexés dans lesquels :

  • la figure 1 représente une vue en coupe partielle de la pièce d'horlogerie illustrant le dispositif de fixation du cadran selon une première forme de réalisation de l'invention;
  • la figure 2 représente une vue en coupe partielle de la pièce d'horlogerie illustrant le dispositif de fixation du cadran selon une deuxième forme de réalisation de l'invention;
  • la figure 3 représente une vue en coupe partielle de la pièce d'horlogerie illustrant le dispositif de fixation du cadran selon une troisième forme de réalisation de l'invention, et
  • la figure 4 représente une vue en coupe partielle de la pièce d'horlogerie illustrant le dispositif de fixation du cadran selon une quatrième forme de réalisation de l'invention;
Other characteristics and advantages of the present invention will appear on reading several embodiments given solely by way of non-limiting examples and made with reference to the appended drawings in which:
  • the figure 1 shows a partial sectional view of the timepiece illustrating the dial fixing device according to a first embodiment of the invention;
  • the figure 2 shows a partial sectional view of the timepiece illustrating the dial fixing device according to a second embodiment of the invention;
  • the picture 3 shows a partial sectional view of the timepiece illustrating the dial fixing device according to a third embodiment of the invention, and
  • the figure 4 shows a partial sectional view of the timepiece illustrating the dial fixing device according to a fourth embodiment of the invention;

Description détaillée de l'inventionDetailed description of the invention

De manière générale, le dispositif de fixation d'un cadran selon l'invention décrit ci-après, selon différentes formes de réalisation, peut être mis en oeuvre dans des montres mécaniques ou à quartz comportant un cadran de type conventionnel/ classique, c'est-à-dire un cadran comportant par exemple des indexes répartis à intervalles réguliers autour de la périphérique du cadran, des chiffres pour représenter les heures, par exemple sous la forme d'appliques fixées sur le cadran et, selon le calibre, d'un ou plusieurs guichets pour indiquer par exemple la date ou d'autres informations. Le dispositif de fixation d'un cadran selon l'invention peut également être mis en oeuvre dans des montres comportant un cadran de type non-conventionnel. Le dispositif de fixation selon l'invention est par exemple particulièrement bien adapté pour la fixation d'un cadran comportant ou constitué d'une cellule solaire pour alimenter par exemple une batterie et/ou un module électronique d'une montre dite intelligente.In general, the device for fixing a dial according to the invention described below, according to different embodiments, can be put in work in mechanical or quartz watches comprising a dial of the conventional/classic type, that is to say a dial comprising, for example, indexes distributed at regular intervals around the peripheral of the dial, figures to represent the hours, for example in the form of appliques fixed on the dial and, depending on the caliber, one or more apertures to indicate, for example, the date or other information. The device for fixing a dial according to the invention can also be implemented in watches comprising a dial of the non-conventional type. The fixing device according to the invention is, for example, particularly well suited for fixing a dial comprising or consisting of a solar cell to power, for example, a battery and/or an electronic module of a so-called smart watch.

Dans les différents modes de réalisation illustrés sur les figures 1 à 4, le dispositif de fixation du cadran 12 comporte un tube de maintien 15 agencé autour du canon des heures 14b et est relié mécaniquement au module moteur 10 par exemple par crochetage et ce par l'intermédiaire d'une extension radiale 18. De plus ce dispositif de fixation comprend aussi un organe de retenue 20a à 20c. Cet organe de retenue 20a à 20c est de une pièce rapportée. Un tel organe de retenue 20a à 20c est une pièce qui est de préférence souple et/ou déformable prévue pour être agencée entre une seconde partie cylindrique 15b d'un tube de maintien 15, et le cadran 12 ou le support de cadran 17 de la montre. En effet, sous l'action de cette seconde partie du cylindrique 15b, cet organe de retenue 20a à 20c est apte à prendre appui contre une partie du cadran adjacente à une ouverture centrale 13 de ce cadran 12 et/ou contre le support de cadran 17. En référence à la figure 1, qui illustre une première forme de réalisation de l'invention, la pièce d'horlogerie comporte notamment un module moteur 10, le cadran 12 pourvu d'une ouverture centrale 13, une chaussée 14a et un canon des heures 14b traversant l'ouverture centrale 13 du cadran 12 et entrainés en rotation par le module moteur 10. Le cadran 12 est fixé sur un support de cadran 17 par exemple au moyen d'un adhésif double-face 30a. La forme du support de cadran 17 est sensiblement identique à la forme du cadran 12. Le support de cadran 17 est monté sur un support de mouvement 26, lequel est fixé à sur support de circuit, de préférence un support de circuit imprimé 28, par exemple au moyen d'un adhésif double-face 30b. L'empilement des différents supports 17, 26, 28 forment une base rigide sur lequel repose le cadran 12, ce qui a pour avantage d'éviter une déformation du cadran 12 en cas de choc axial.In the various embodiments illustrated in the figures 1 to 4 , the dial fixing device 12 comprises a retaining tube 15 arranged around the hour barrel 14b and is mechanically connected to the motor module 10, for example by hooking and this via a radial extension 18. In addition, this device fixing also comprises a retainer 20a to 20c. This retainer 20a to 20c is an added piece. Such a retaining member 20a to 20c is a part which is preferably flexible and/or deformable intended to be arranged between a second cylindrical part 15b of a retaining tube 15, and the dial 12 or the dial support 17 of the watch. Indeed, under the action of this second part of the cylinder 15b, this retaining member 20a to 20c is able to bear against a part of the dial adjacent to a central opening 13 of this dial 12 and/or against the dial support 17. With reference to the figure 1 , which illustrates a first embodiment of the invention, the timepiece comprises in particular a motor module 10, the dial 12 provided with a central opening 13, a floor 14a and an hour barrel 14b passing through the central opening 13 of dial 12 and driven in rotation by the motor module 10. The dial 12 is fixed on a dial support 17 for example by means of a double-sided adhesive 30a. The shape of the dial support 17 is substantially identical to the shape of the dial 12. The dial support 17 is mounted on a movement support 26, which is fixed to a circuit support, preferably a printed circuit support 28, by example by means of a double-sided adhesive 30b. The stack of different supports 17, 26, 28 form a rigid base on which the dial 12 rests, which has the advantage of avoiding deformation of the dial 12 in the event of an axial impact.

Cette base rigide est particulièrement bien adaptée pour un cadran 12 formé notamment d'une cellule solaire afin d'éviter une éventuelle rupture du substrat en verre de la cellule en cas de choc axial important.This rigid base is particularly well suited for a dial 12 formed in particular of a solar cell in order to avoid any breakage of the glass substrate of the cell in the event of a major axial impact.

La pièce d'horlogerie comporte le dispositif de fixation du cadran 12 comportant l'organe de retenue 20a, le tube de maintien 15 agencé autour du canon des heures 14b et relié mécaniquement au module moteur 10 ainsi. Le tube de maintien 15 comporte une première partie cylindrique 15a possédant un premier diamètre D1 et une seconde partie cylindrique 15b possédant un second diamètre D2 inférieur au premier diamètre D1. La première partie cylindrique 15a est logée dans une portion tubulaire formée par l'empilement des ouvertures centrales du support de cadran 17, du support de mouvement 26 et du support du circuit imprimé 28. Cet organe de retenue 20a comprend une rondelle de retenue 20a et est agencé sur la circonférence de la seconde partie cylindrique 15b. Cette rondelle de retenue 20a s'étend radialement de sorte à ce que sa périphérie prenne appuie contre le support de cadran 17 afin d'exercer une force axiale sur le support de cadran 17. Une extrémité de la première partie cylindrique 15a comporte l'extension radiale 18, par exemple de forme annulaire, qui est fixée ou reliée mécaniquement à un pont 10a du module moteur 10.The timepiece comprises the dial fixing device 12 comprising the retaining member 20a, the retaining tube 15 arranged around the hour barrel 14b and thus mechanically connected to the motor module 10. The holding tube 15 comprises a first cylindrical part 15a having a first diameter D1 and a second cylindrical part 15b having a second diameter D2 smaller than the first diameter D1. The first cylindrical part 15a is housed in a tubular portion formed by the stacking of the central openings of the dial support 17, of the movement support 26 and of the printed circuit support 28. This retaining member 20a comprises a retaining washer 20a and is arranged on the circumference of the second cylindrical part 15b. This retaining washer 20a extends radially so that its periphery bears against the dial support 17 in order to exert an axial force on the dial support 17. One end of the first cylindrical part 15a comprises the extension radial 18, for example of annular shape, which is fixed or mechanically connected to a bridge 10a of the motor module 10.

En référence à la figure 2, qui illustre une deuxième forme de réalisation de l'invention, l'organe de retenue 20b comprend un anneau élastique 20b. Cet anneau élastique 20b est agencé à l'intérieur d'une gorge 22 réalisée sur la circonférence externe du tube de maintien 15 de sorte à ce que l'anneau élastique 20b soit en appui contre le support de cadran 17. L'anneau élastique peut par exemple être de type circlip afin de faciliter le démontage du dispositif de fixation. A l'instar de la première forme de réalisation, le tube de maintien 15 est logé dans la portion tubulaire formée par l'empilement des différents supports 17, 26, 28 afin de réaliser cette base rigide adaptée pour un cadran 12 comportant ou constitué d'une cellule solaire. Une extrémité du tube de maintien 15 comporte l'extension radiale 18, par exemple de forme annulaire, qui est fixée à un pont 10a du module moteur 10.With reference to the picture 2 , which illustrates a second embodiment of the invention, the retainer 20b comprises an elastic ring 20b. This elastic ring 20b is arranged inside a groove 22 made on the outer circumference of the retaining tube 15 so that the elastic ring 20b bears against the dial support 17. The elastic ring can for example be of the circlip type in order to facilitate the dismantling of the fastening device. Like the first embodiment, the retaining tube 15 is housed in the tubular portion formed by the stacking of the various supports 17, 26, 28 in order to produce this rigid base suitable for a dial 12 comprising or consisting of a solar cell. One end of the retaining tube 15 comprises the radial extension 18, for example of annular shape, which is fixed to a bridge 10a of the motor module 10.

Selon la figure 3, qui illustre une troisième forme de réalisation de l'invention, le tube de maintien 15 comprend un premier tube 16a comportant, d'une part, une extension radiale fixée à un pont 10a du module moteur 10, et d'autre part, une partie filetée sur sa circonférence interne. Le premier tube 16a est logé dans la portion tubulaire formée par l'empilement des différents supports 17, 26, 28 réalisant cette base rigide. Le tube de maintien 15 comporte en outre un second tube 16b sous la forme d'une vis vissée dans la partie filetée du premier tube 16a. La vis 16b comporte à une extrémité une extension radiale 24 afin de former une surface d'appui circulaire 24a. Dans le dispositif de fixation, l'organe de retenue 20c comprend un joint 20c, par exemple de type O-ring. Ce joint 20c est agencé contre la surface d'appui circulaire 24a de la vis 16b et le support de cadran 17 de sorte à exercer une force axiale sur le support de cadran 17. La vis 16b est noyée dans l'ouverture centrale 13 du cadran 12. Pour la fixation d'un cadran classique, le diamètre de l'extension radiale 24 est de préférence sensiblement identique au diamètre de l'ouverture centrale 13 du cadran afin d'avoir un aspect esthétique avantageux.According to picture 3 , which illustrates a third embodiment of the invention, the retaining tube 15 comprises a first tube 16a comprising, on the one hand, a radial extension fixed to a bridge 10a of the motor module 10, and on the other hand, a threaded portion on its inner circumference. The first tube 16a is housed in the tubular portion formed by the stacking of the various supports 17, 26, 28 producing this rigid base. The retaining tube 15 further comprises a second tube 16b in the form of a screw screwed into the threaded part of the first tube 16a. The screw 16b has at one end a radial extension 24 in order to form a circular bearing surface 24a. In the fastening device, the retainer 20c comprises a seal 20c, for example of the O-ring type. This seal 20c is arranged against the circular bearing surface 24a of the screw 16b and the dial support 17 so as to exert an axial force on the dial support 17. The screw 16b is embedded in the central opening 13 of the dial 12. For fixing a conventional dial, the diameter of the radial extension 24 is preferably substantially identical to the diameter of the central opening 13 of the dial in order to have an advantageous aesthetic appearance.

Dans une variante, l'organe de retenue 20c du dispositif de fixation comprend joint 20c qui est agencé contre la surface d'appui circulaire 24a de la vis 16b et le support de cadran 17. Dans ces conditions l'extension radiale 24 formant une surface d'appui circulaire 24a définie à l'extrémité de ladite vis 16b est alors apte à exercer directement une force axiale sur le support de cadran 17 par l'intermédiaire de l'organe de retenue 20c.In a variant, the retaining member 20c of the fixing device comprises seal 20c which is arranged against the circular bearing surface 24a of the screw 16b and the dial support 17. Under these conditions the radial extension 24 forming a surface circular support 24a defined at the end of said screw 16b is then capable of directly exerting an axial force on the dial support 17 via the retainer 20c.

Selon la figure 4, qui illustre une quatrième forme de réalisation de l'invention, le dispositif de fixation du cadran comporte un tube de maintien de construction similaire à la troisième forme de réalisation à la différence que la vis 16b comporte une partie surélevée 32 par rapport au cadran 12 qui s'étend radialement afin de recouvrir l'ouverture centrale 13 du cadran 12. Cette forme de réalisation est particulièrement adaptée pour un cadran comportant ou constitué d'une cellule solaire puisque la partie surélevée 32 à l'avantage de cacher les défauts de découpe de la cellule solaire.According to figure 4 , which illustrates a fourth embodiment of the invention, the dial fixing device comprises a holding tube of construction similar to the third embodiment except that the screw 16b comprises a raised part 32 with respect to the dial 12 which extends radially in order to cover the central opening 13 of the dial 12. This embodiment is particularly suitable for a dial comprising or consisting of a solar cell since the raised part 32 has the advantage of hiding the cutting defects of the solar cell.

La rondelle de retenue 20a selon la figure 1, le circlip 20b selon la figure 2 ainsi que le second tube 16b sous la forme d'une vis vissée dans la partie filetée du premier tube 16a selon les figures 3 et 4 ont tous l'avantage d'empêcher un déchassage des aiguilles lors d'un choc axial important.The retaining washer 20a according to the figure 1 , the circlip 20b according to picture 2 as well as the second tube 16b in the form of a screw screwed into the threaded part of the first tube 16a according to the figures 3 and 4 all have the advantage of preventing the needles from coming out in the event of a major axial impact.

Naturellement, l'invention n'est pas limitée aux formes de réalisation décrites en référence aux figures et des variantes pourraient être implémentées sans sortir du cadre de l'invention. Par exemple, le tube de maintien 15 selon l'une quelconque des formes de réalisation qui viennent d'être décrites, peut être adapté pour être en appui ou exercer une contrainte axiale non pas sur le support de cadran 17 mais directement sur le cadran 12 lui-même voire directement à la fois sur le support de cadran 17 et le cadran 12. A cet effet, le cadran 12 peut par exemple comporter une partie de cadran adjacente à l'ouverture centrale 13 du cadran contre laquelle est en appui l'organe de retenue tel que la rondelle de retenue 20a, le circlip 20b ou le joint 20c selon la forme de réalisation choisie parmi celles décrites précédemment. La partie de cadran adjacente à l'ouverture centrale 13 peut définir une zone annulaire en retrait par rapport à la plus grande partie de la surface du cadran de sorte à ce qu'une surface de la partie supérieure du tube de maintien soit au même niveau que le cadran.Naturally, the invention is not limited to the embodiments described with reference to the figures and variants could be implemented without departing from the scope of the invention. For example, the retaining tube 15 according to any one of the embodiments which have just been described, can be adapted to rest on or exert an axial stress not on the dial support 17 but directly on the dial 12 itself or even directly on both the dial support 17 and the dial 12. To this end, the dial 12 can for example comprise a dial part adjacent to the central opening 13 of the dial against which the retaining member such as the retaining washer 20a, the circlip 20b or the seal 20c according to the embodiment chosen from those described above. The part dial adjacent to the central opening 13 can define an annular area set back from the greater part of the surface of the dial so that a surface of the upper part of the support tube is at the same level as the dial.

Le dispositif de fixation selon l'invention à l'avantage de permettre de réaliser des cadrans dans différentes matières qui ne sont pas compatible pour la fabrication de cadrans à pieds. Ces cadrans peuvent être obtenus notamment par des procédés d'injection de plastique, de métal ou de verre.The fixing device according to the invention has the advantage of making it possible to produce dials in different materials which are not compatible for the manufacture of foot dials. These dials can be obtained in particular by plastic, metal or glass injection processes.

Claims (11)

  1. Timepiece comprising a drive module (10), a dial (12) comprising a central opening (13), an hour pipe (14) passing through the central opening (13) of the dial (12) and driven in rotation by the drive module (10), and a device for attaching the dial, in which said attachment device comprises:
    - a holding tube (15) arranged around the hour pipe (14) and mechanically connected to the drive module (10), and
    - a retaining member (20a, 20b, 20c) arranged between the holding tube (15) and the dial (12) and/or a dial support (17) to which the dial is attached, characterised in that said retaining member (20a, 20b, 20c) is a part fixed thereto.
  2. Timepiece according to claim 1, characterised in that the retaining member (20a, 20b, 20c) is arranged between the holding tube (15) and the dial (12) and/or a dial support (17) while bearing against a part of the dial that is adjacent to the central opening (13) of the dial (12) and/or against the dial support (17).
  3. Timepiece according to claim 2, characterised in that a part of the dial adjacent to the central opening (13) of the dial (12) defines an annular bearing area that is set back relative to the surface of the dial (12), such that a surface of the top part of the holding tube (15) is level with the surface of the dial (12).
  4. Timepiece according to claim 2 or 3, characterised in that a holding tube (15) comprises a first cylindrical part (15a) having a first diameter (D1) and a second cylindrical part (15b) having a second diameter (D2) that is less than the first diameter (D1). and in that the retaining member is a washer (20a) arranged on the circumference of the second cylindrical part (15b) and bearing against the annular area of the dial (12) or against the dial support (16) so as to exert an axial force on the dial (12) or the dial support (17).
  5. Timepiece according to claim 2 or 3, characterised in that a retaining member is a resilient ring (20b), preferably of the circlip type, arranged inside a groove (22) made on at least one part of the outer circumference of the holding tube (15) such that the resilient ring (20b) bears against the annular area of the dial (12) or against the dial support (17).
  6. Timepiece according to claim 2 or 3, characterised in that a holding tube (15) comprises, on the one hand, a first tube (16a) mechanically connected to the drive module (10) and comprising a threaded part on the inner circumference thereof, and on the other hand, a second tube (16b) in the form of a screw screwed into the threaded part of the first tube (16a), the screw (16b) comprising a radial extension (24) in order to form a circular bearing surface (24b) and in that the retaining member is in the form of a gasket (20c), preferably of the O-ring type, arranged against the circular bearing surface (24b) of the screw (16b) and the annular area of the dial (12) or the dial support (17) so as to exert an axial force on the dial (12) or the dial support (17).
  7. Timepiece according to claim 6, characterised in that a screw (16b) is embedded in the central opening (13) of the dial (12).
  8. Timepiece according to claim 6, characterised in that a screw (16b) comprises a part (32) which is raised relative to the dial and which extends radially in order to cover the central opening (13) of the dial (12).
  9. Timepiece according to any of the preceding claims, further comprising a movement support (26) and a circuit support (28), arranged between the dial support (17) and the drive module (10), the stack of each support (17, 26, 28) forming a rigid base preventing the dial (12) from becoming deformed in the event of an axial impact.
  10. Timepiece according to claim 9, characterised in that each support (17, 26, 28) comprises a central opening in order to form a recess inside which the holding tube (15) is at least partially adjusted.
  11. Timepiece according to any of the preceding claims, characterised in that the dial comprises or is formed by at least one solar cell.
EP18815697.0A 2017-12-21 2018-12-10 Timepiece comprising a device for attaching a dial Active EP3729204B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP17209869.1A EP3502790A1 (en) 2017-12-21 2017-12-21 Timepiece comprising a device for attaching a dial
PCT/EP2018/084210 WO2019121116A1 (en) 2017-12-21 2018-12-10 Timepiece comprising a dial attachment device

Publications (2)

Publication Number Publication Date
EP3729204A1 EP3729204A1 (en) 2020-10-28
EP3729204B1 true EP3729204B1 (en) 2023-01-25

Family

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EP17209869.1A Withdrawn EP3502790A1 (en) 2017-12-21 2017-12-21 Timepiece comprising a device for attaching a dial
EP18815697.0A Active EP3729204B1 (en) 2017-12-21 2018-12-10 Timepiece comprising a device for attaching a dial

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP17209869.1A Withdrawn EP3502790A1 (en) 2017-12-21 2017-12-21 Timepiece comprising a device for attaching a dial

Country Status (6)

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US (1) US11687036B2 (en)
EP (2) EP3502790A1 (en)
JP (1) JP7137630B2 (en)
KR (1) KR102392230B1 (en)
CN (1) CN111465905B (en)
WO (1) WO2019121116A1 (en)

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US20200292994A1 (en) 2020-09-17
KR102392230B1 (en) 2022-04-28
KR20200089720A (en) 2020-07-27
CN111465905B (en) 2022-09-02
EP3502790A1 (en) 2019-06-26
WO2019121116A1 (en) 2019-06-27
CN111465905A (en) 2020-07-28
US11687036B2 (en) 2023-06-27
EP3729204A1 (en) 2020-10-28
JP7137630B2 (en) 2022-09-14
JP2021507267A (en) 2021-02-22

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