EP2673676B1 - Watch including a bezel, and method for attaching such bezel - Google Patents

Watch including a bezel, and method for attaching such bezel Download PDF

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Publication number
EP2673676B1
EP2673676B1 EP12702547.6A EP12702547A EP2673676B1 EP 2673676 B1 EP2673676 B1 EP 2673676B1 EP 12702547 A EP12702547 A EP 12702547A EP 2673676 B1 EP2673676 B1 EP 2673676B1
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EP
European Patent Office
Prior art keywords
watch
crystal
bezel
ice
shoulder
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EP12702547.6A
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German (de)
French (fr)
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EP2673676A1 (en
Inventor
André Kaltenrieder
Martin Jufer
Christian Racine
Jean-Luc Bovet
Jérôme Grosjean
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ETA SA Manufacture Horlogere Suisse
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ETA SA Manufacture Horlogere Suisse
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Priority to EP12702547.6A priority Critical patent/EP2673676B1/en
Publication of EP2673676A1 publication Critical patent/EP2673676A1/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
    • G04B39/00—Watch crystals; Fastening or sealing of crystals; Clock glasses
    • G04B39/02—Sealing crystals or glasses
    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G17/00—Structural details; Housings
    • G04G17/02—Component assemblies
    • G04G17/04—Mounting of electronic components
    • G04G17/045—Mounting of the display

Definitions

  • the present invention relates to a watch comprising a telescope as well as a method of fixing such a telescope. More specifically, the present invention relates to a watch comprising a bezel for fixing an ice perfectly tight and durable manner in time.
  • the ultrasonic welding technique allows to secure the ice on the middle part of the watch perfectly waterproof and durable over time.
  • bonding techniques which do not induce temperature rise.
  • gluing techniques pose other problems. They do not always guarantee a good seal and pose problems of resistance over time.
  • the document CH 661635 discloses a watch comprising a caseband which delimits with an ice a watch case, a scope being arranged in the caseband, the watch comprising an ultrasound welded bezel on the one hand on the ice, and on the other hand on the caseband.
  • the present invention aims to overcome these problems by providing a telescope that allows a tight and durable mounting of a watch glass glued to a caseband.
  • the present invention relates to a watch comprising a middle part which delimits with an ice a watch case, the ice being only resting on a bearing formed in the middle with which it is glued the watch comprising an ultrasonic welded bezel of on the ice and on the middle.
  • the present invention also relates to a method of fixing a watch bezel, this watch comprising a caseband which delimits with an ice a watch case, this method being characterized in that it consists in sticking the ice on a seat provided in the middle part, the ice being only supported on this scope, then to weld the telescope by ultrasound firstly on the ice and secondly on the middle part, the ultrasonic welding step can be carried out while the bonding is not yet dry, the ultrasonic energy being provided in two distinct zones, firstly in a first zone where the telescope is in surface support on the ice and, secondly, in a second zone where the telescope is in surface support on the middle part.
  • the present invention provides a watch whose bezel, ultrasonically welded to the ice and the middle part, allows a perfectly sealed and durable mounting of the ice, although it is simply glued to the middle part.
  • the bezel is supported on the one hand on the ice and secondly on the middle part so that, once welded by ultrasound, it fixes and perfectly seals the assembly formed by the ice and the middle part.
  • the ultrasonic welding step of the telescope can intervene shortly after the bonding of the ice on the middle part. It is no longer necessary to wait for the bonding to be polymerized in order to be able to continue the assembly steps of the watch according to the invention. This represents an appreciable saving of time and especially allows to work in continuous flow, without breaking the manufacturing process.
  • the welding of the telescope by ultrasound provides a solid mounting including excellent resistance to permanent and opposing forces exerted by two flexible connectors.
  • the present invention proceeds from the general inventive idea of maintaining an ice bonded to a watchband by means of a telescope which, for its part, is ultrasonically welded on both the ice and the middle part.
  • the telescope is supported both on the ice and on the middle, it is possible to make the mounting of the ice on the middle part of the watch perfectly waterproof and durable although the ice is only glued and not welded. This is particularly advantageous in the case where, for example because of the presence of elements sensitive to mechanical and thermal stresses, it is not possible to ultrasonically weld the ice on the middle part.
  • the single figure appended to this patent application is a partial sectional view of a watch case according to the invention.
  • this watch case is delimited by a middle part 2 closed upwards by an ice cream 4.
  • the middle part 2 and the watch crystal 4 are made of materials that can be glued.
  • the ice 4 is made of polymethylmethacrylate or PMMA while the middle part 2 is made of acrylonitrile butadiene styrene or ABS.
  • the watch glass 4 comprises two faces, namely an upper face 6 directed on the user's side of the watch and a lower face 8 directed on the side of the watch case 1.
  • the lens 4 bears against a bearing 10 2. It is made integral with the middle part 2 by means of a thin line of glue 12.
  • the glaze 4 is therefore only stuck on the bearing surface 10 formed in the caseband 2, and does not bear against a dial or any other part of the watch by which the ultrasonic energy could be transmitted to the movement of the watch and deteriorate it.
  • the ice 4 can be permanently immobilized and its mounting on the caseband 2 perfectly sealed by means of a telescope 14 which, as visible in the drawing, is supported on the ice 4 on the one hand, and on the middle 2 on the other hand.
  • the bezel 14 is made of M-ABS, that is to say of transparent ABS plastic material.
  • the attachment of the telescope 14 on the ice 4 and on the middle part 2 is done by ultrasonic welding.
  • a first annular collar 16 is provided on the outer periphery of the middle part 2 and a second annular flange 18 located under the surface of the telescope 14. These two collars 16 and 18 are provided at locations where the bezel 14 bears against the middle part 2, respectively the glass 4.
  • These two flanges 16 and 18 act as a director of ultrasonic energy and represent a supply of thermoplastic material that will be consumed during the welding process.
  • the fraction of the flanges 16 and 18 which is consumed during welding is shown in dashed lines in areas surrounded by a circle in the single figure.
  • the ultrasonic energy is supplied in two distinct zones, firstly in a first zone where the telescope 14 bears on the ice 4 and, secondly, in a second zone where the telescope 14 is 2. Since the ultrasonic energy is provided in two separate zones respectively corresponding to the welding of the telescope 14 on the glass 4 and to the welding of the telescope 14 on the middle part 2, the intensity of the ultrasonic energy provided in these two areas remains within acceptable limits that are not likely to cause deterioration of the internal components of the watch. This is not the case when ultrasonic energy is brought into a single zone to cause simultaneous welding of the telescope on the ice and the middle part. In such a case, the intensity of the applied ultrasonic energy is high and the risks of deteriorating the internal components of the watch are great.
  • a digital display device is attached to the lower face 8 of the lens 4.
  • this digital display device may be a liquid crystal display cell 20 comprising a front substrate 22 and a rear substrate 24 extending parallel and at a distance from one another and joined together by a sealing frame (not visible in the drawing) which delimits a sealed volume for the confinement of the liquid crystal.
  • the two front and rear substrates 24 are arranged between a first and a second polarizer 26 and 28, respectively, whose polarization directions are crossed.
  • the assembly formed by the two substrates 22 and 24 and the two polarizers 26 and 28 is glued by means of an optical adhesive layer 30 on the lower face 8 of the watch glass 4.
  • the dimensions of the front substrate 22 exceed those of the rear substrate 24.
  • These electronic control components are mounted on a printed circuit board 36 arranged in the watch case 1, under the display cell 20 and remotely. of it.
  • the conductive tracks 34 for the electrical connection of the control electrodes of the liquid crystal display cell 20 are connected to corresponding conductive tracks 38 structured on the surface of the printed circuit board 36 by means of an elastomeric connector 40 which extends substantially vertically.
  • an elastomeric connector also known by its zebra connector trade name, is a flexible connector formed of a plurality of conductive sheets separated from each other by elastomeric insulating sheets.
  • the assembly is completed by a light guide 42 which is supported on the printed circuit board 36 and which serves to illuminate the back or backlight of the liquid crystal display cell 20.
  • the light guide 42 includes a slot 44 for guiding and holding the zebra connector 40 vertically.
  • the level of the span 10 relative to the printed circuit board 36 is such that when the glass 4 is bonded to the middle part 2, the zebra connector 40 is compressed.
  • the compressed portion of the zebra connector 40 is shown in dashed lines in the figure.
  • the present invention finds all its interest. On the one hand, because a liquid crystal cell 20 is stuck on the lower face 8 of the glass 4, sticking the glass 4 on the middle part 2 avoids any risk of damaging the cell 20. D on the other hand, since the zebra connector 40 is compressed between the liquid crystal display cell 20 and the printed circuit board 36, it tends to want to return to its original shape and exerts on the ice 4 a constraint which tends to to take off the ice 4 of the caseband 2.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Electric Clocks (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Description

La présente invention concerne une montre comprenant une lunette de même qu'un procédé de fixation d'une telle lunette. Plus précisément, la présente invention concerne une montre comprenant une lunette permettant de fixer une glace de manière parfaitement étanche et durable dans le temps.The present invention relates to a watch comprising a telescope as well as a method of fixing such a telescope. More specifically, the present invention relates to a watch comprising a bezel for fixing an ice perfectly tight and durable manner in time.

Dans le cas d'une glace de montre réalisée en un matériau organique tel qu'un matériau plastique, on préfère utiliser la technique des ultrasons pour le soudage d'une telle glace sur une carrure de montre également en matériau plastique. En effet, la technique de soudage par ultrasons permet de solidariser la glace sur la carrure de la montre de manière parfaitement étanche et durable dans le temps. Il existe cependant des cas où la technique de soudage par ultrasons n'est pas appropriée. Ceci est notamment vrai lorsque des éléments sont sensibles aux sollicitations mécaniques et thermiques. Dans de tels cas, on préfère utiliser des techniques de collage qui n'induisent pas d'élévation de température. Les techniques de collage posent cependant d'autres problèmes. Elles ne garantissent pas toujours une bonne étanchéité et posent des problèmes de tenue dans le temps. En outre, il est nécessaire, après collage des pièces, de respecter un temps de polymérisation, habituellement de vingt-quatre heures. Il y a donc rupture du flux de production, ce qui est pénalisant d'un point de vue économique.In the case of a watch glass made of an organic material such as a plastic material, it is preferred to use the ultrasound technique for welding such ice on a watch case also made of plastic material. Indeed, the ultrasonic welding technique allows to secure the ice on the middle part of the watch perfectly waterproof and durable over time. However, there are cases where the ultrasonic welding technique is not appropriate. This is particularly true when elements are sensitive to mechanical and thermal stresses. In such cases, it is preferred to use bonding techniques which do not induce temperature rise. However, gluing techniques pose other problems. They do not always guarantee a good seal and pose problems of resistance over time. In addition, it is necessary, after gluing the pieces, to respect a polymerization time, usually twenty-four hours. There is therefore a break in the production flow, which is penalizing from an economic point of view.

Le document CH 661635 divulgue une montre comprenant une carrure qui délimite avec une glace une boîte de montre, une portée étant aménagée dans la carrure, la montre comprenant une lunette soudée par ultrasons d'une part sur la glace, et d'autre part sur la carrure.The document CH 661635 discloses a watch comprising a caseband which delimits with an ice a watch case, a scope being arranged in the caseband, the watch comprising an ultrasound welded bezel on the one hand on the ice, and on the other hand on the caseband.

La présente invention a pour but de pallier ces problèmes en procurant une lunette qui permet un montage étanche et durable d'une glace de montre collée sur une carrure.The present invention aims to overcome these problems by providing a telescope that allows a tight and durable mounting of a watch glass glued to a caseband.

A cet effet, la présente invention concerne une montre comprenant une carrure qui délimite avec une glace une boîte de montre, la glace étant uniquement en appui sur une portée ménagée dans la carrure avec laquelle elle est collée la montre comprenant une lunette soudée par ultrasons d'une part sur la glace et d'autre part sur la carrure.For this purpose, the present invention relates to a watch comprising a middle part which delimits with an ice a watch case, the ice being only resting on a bearing formed in the middle with which it is glued the watch comprising an ultrasonic welded bezel of on the ice and on the middle.

La présente invention concerne également un procédé de fixation d'une lunette de montre, cette montre comprenant une carrure qui délimite avec une glace une boîte de montre, ce procédé étant caractérisé en ce qu'il consiste à coller la glace sur une portée ménagée dans la carrure, la glace étant uniquement en appui sur cette portée, puis à souder la lunette par ultrasons d'une part sur la glace et d'autre part sur la carrure, l'étape de soudage par ultrasons pouvant être effectuée alors que le collage n'est pas encore sec, l'énergie ultrasonore étant apportée dans deux zones distinctes, d'une part dans une première zone où la lunette est en appui surfacique sur la glace et, d'autre part, dans une seconde zone où la lunette est en appui surfacique sur la carrure.The present invention also relates to a method of fixing a watch bezel, this watch comprising a caseband which delimits with an ice a watch case, this method being characterized in that it consists in sticking the ice on a seat provided in the middle part, the ice being only supported on this scope, then to weld the telescope by ultrasound firstly on the ice and secondly on the middle part, the ultrasonic welding step can be carried out while the bonding is not yet dry, the ultrasonic energy being provided in two distinct zones, firstly in a first zone where the telescope is in surface support on the ice and, secondly, in a second zone where the telescope is in surface support on the middle part.

Grâce à ces caractéristiques, la présente invention procure une montre dont la lunette, soudée par ultrasons sur la glace et la carrure, permet un montage parfaitement étanche et durable de la glace, bien que cette-dernière soit simplement collée sur la carrure. En effet, la lunette est en appui d'une part sur la glace et d'autre part sur la carrure de sorte que, une fois soudée par ultrasons, elle fixe et étanchéifie parfaitement l'ensemble formé par la glace et la carrure. De plus, l'étape de soudage par ultrasons de la lunette peut intervenir à bref délai après le collage de la glace sur la carrure. Il n'est plus nécessaire d'attendre que le collage soit polymérisé pour pouvoir poursuivre les étapes d'assemblage de la montre selon l'invention. Ceci représente un gain de temps appréciable et surtout permet de travailler en flux continu, sans rupture du procédé de fabrication.Thanks to these features, the present invention provides a watch whose bezel, ultrasonically welded to the ice and the middle part, allows a perfectly sealed and durable mounting of the ice, although it is simply glued to the middle part. Indeed, the bezel is supported on the one hand on the ice and secondly on the middle part so that, once welded by ultrasound, it fixes and perfectly seals the assembly formed by the ice and the middle part. In addition, the ultrasonic welding step of the telescope can intervene shortly after the bonding of the ice on the middle part. It is no longer necessary to wait for the bonding to be polymerized in order to be able to continue the assembly steps of the watch according to the invention. This represents an appreciable saving of time and especially allows to work in continuous flow, without breaking the manufacturing process.

En outre, le soudage de la lunette par ultrasons permet d'obtenir un montage solide offrant notamment une excellente résistance aux forces permanentes et opposées exercées par deux connecteurs souples.In addition, the welding of the telescope by ultrasound provides a solid mounting including excellent resistance to permanent and opposing forces exerted by two flexible connectors.

D'autres caractéristiques et avantages de la présente invention ressortiront plus clairement de la description détaillée qui suit d'un mode de réalisation de la montre selon l'invention, cet exemple étant donné à titre purement illustratif et non limitatif seulement, en liaison avec le dessin annexé sur lequel la figure unique est une vue partielle en coupe d'une boîte de montre selon l'invention.Other features and advantages of the present invention will emerge more clearly from the following detailed description of an embodiment of the watch according to the invention, this example being given by way of purely illustrative and not limiting only, in connection with the drawing annexed in which the single figure is a partial sectional view of a watch case according to the invention.

La présente invention procède de l'idée générale inventive qui consiste à maintenir une glace collée sur une carrure de montre au moyen d'une lunette qui, quant à elle, est soudée par ultrasons à la fois sur la glace et sur la carrure. La lunette étant en appui à la fois sur la glace et sur la carrure, il est possible de rendre le montage de la glace sur la carrure de la montre parfaitement étanche et durable bien que la glace ne soit que collée et non pas soudée. Ceci est particulièrement avantageux dans le cas où, en raison de la présence par exemple d'éléments sensibles aux sollicitations mécaniques et thermiques, il n'est pas envisageable de souder par ultrasons la glace sur la carrure. D'autre part, il est possible de souder la lunette par ultrasons juste après collage de la glace, sans attendre le séchage du collage, ce qui n'interrompt pas le flux de production.The present invention proceeds from the general inventive idea of maintaining an ice bonded to a watchband by means of a telescope which, for its part, is ultrasonically welded on both the ice and the middle part. The telescope is supported both on the ice and on the middle, it is possible to make the mounting of the ice on the middle part of the watch perfectly waterproof and durable although the ice is only glued and not welded. This is particularly advantageous in the case where, for example because of the presence of elements sensitive to mechanical and thermal stresses, it is not possible to ultrasonically weld the ice on the middle part. On the other hand, it is possible to weld the telescope by ultrasound just after gluing the ice, without waiting for the drying of the gluing, which does not interrupt the flow of production.

La figure unique annexée à la présente demande de brevet est une vue partielle en coupe d'une boîte de montre selon l'invention. Désignée dans son ensemble par la référence numérique générale 1, cette boîte de montre est délimitée par une carrure 2 fermée vers le haut par une glace 4. La carrure 2 et la glace de montre 4 sont réalisées en des matériaux aptes à être collés. A titre d'exemple non limitatif seulement, la glace 4 est réalisée en polyméthacrylate de méthyle ou PMMA tandis que la carrure 2 est réalisée en acrylonitrile butadiène styrène ou ABS.The single figure appended to this patent application is a partial sectional view of a watch case according to the invention. Designated as a whole by the general numerical reference 1, this watch case is delimited by a middle part 2 closed upwards by an ice cream 4. The middle part 2 and the watch crystal 4 are made of materials that can be glued. By way of non-limiting example only, the ice 4 is made of polymethylmethacrylate or PMMA while the middle part 2 is made of acrylonitrile butadiene styrene or ABS.

La glace de montre 4 comprend deux faces, à savoir une face supérieure 6 dirigée du côté de l'utilisateur de la montre et une face inférieure 8 dirigée du côté de la boîte de montre 1. La glace 4 est en appui sur une portée 10 de la carrure 2. Elle est rendue solidaire de la carrure 2 au moyen d'un trait de colle 12. La glace 4 est donc uniquement colée sur la portée 10 ménagée dans la carrure 2, et ne vient pas en appui sur un cadran ou toute autre partie de la montre par laquelle l'énergie ultrasonore pourrait être transmise au mouvement de la montre et détériorer celui-ci.The watch glass 4 comprises two faces, namely an upper face 6 directed on the user's side of the watch and a lower face 8 directed on the side of the watch case 1. The lens 4 bears against a bearing 10 2. It is made integral with the middle part 2 by means of a thin line of glue 12. The glaze 4 is therefore only stuck on the bearing surface 10 formed in the caseband 2, and does not bear against a dial or any other part of the watch by which the ultrasonic energy could be transmitted to the movement of the watch and deteriorate it.

Sans délai après le collage de la glace 4 sur la carrure 2, on peut immobiliser définitivement la glace 4 et rendre son montage sur la carrure 2 parfaitement étanche au moyen d'une lunette 14 qui, comme visible sur le dessin, prend appui sur la glace 4 d'une part, et sur la carrure 2 d'autre part. Préférentiellement mais non limitativement, la lunette 14 est réalisée en M-ABS, c'est-à-dire en matériau plastique ABS transparent.Without delay after the bonding of the ice 4 on the middle part 2, the ice 4 can be permanently immobilized and its mounting on the caseband 2 perfectly sealed by means of a telescope 14 which, as visible in the drawing, is supported on the ice 4 on the one hand, and on the middle 2 on the other hand. Preferentially but not exclusively, the bezel 14 is made of M-ABS, that is to say of transparent ABS plastic material.

Conformément à l'invention, la fixation de la lunette 14 sur la glace 4 et sur la carrure 2 se fait par soudage par ultrasons. Pour les besoins du soudage par ultrasons, on prévoit une première collerette annulaire 16 sur le pourtour extérieur de la carrure 2 et une seconde collerette annulaire 18 située sous la surface de la lunette 14. Ces deux collerettes 16 et 18 sont prévues aux endroits où la lunette 14 vient en appui contre la carrure 2, respectivement la glace 4. Ces deux collerettes 16 et 18 jouent le rôle de directeur d'énergie ultrasonore et représentent un apport de matière thermoplastique qui va être consommé durant le procédé de soudage. La fraction des collerettes 16 et 18 qui est consommée lors du soudage est représentée en pointillés dans des zones entourées d'un cercle sur la figure unique. On comprend donc que l'énergie ultrasonore est apportée dans deux zones distinctes, d'une part dans une première zone où la lunette 14 est en appui sur la glace 4 et, d'autre part, dans une seconde zone où la lunette 14 est en appui sur la carrure 2. Comme l'énergie ultrasonore est apportée dans deux zones distinctes correspondant respectivement au soudage de la lunette 14 sur la glace 4 et au soudage de la lunette 14 sur la carrure 2, l'intensité de l'énergie ultrasonore fournie dans ces deux zones reste dans des limites acceptables qui ne risquent pas de provoquer une détérioration des composants internes de la montre. Tel n'est pas le cas lorsqu'on apporte de l'énergie ultrasonore dans une zone unique pour provoquer le soudage simultané de la lunette sur la glace et la carrure. Dans un tel cas, l'intensité de l'énergie ultrasonore appliquée est élevée et les risques de détériorer les composants internes de la montre sont grands.According to the invention, the attachment of the telescope 14 on the ice 4 and on the middle part 2 is done by ultrasonic welding. For the purposes of ultrasonic welding, a first annular collar 16 is provided on the outer periphery of the middle part 2 and a second annular flange 18 located under the surface of the telescope 14. These two collars 16 and 18 are provided at locations where the bezel 14 bears against the middle part 2, respectively the glass 4. These two flanges 16 and 18 act as a director of ultrasonic energy and represent a supply of thermoplastic material that will be consumed during the welding process. The fraction of the flanges 16 and 18 which is consumed during welding is shown in dashed lines in areas surrounded by a circle in the single figure. It is therefore understood that the ultrasonic energy is supplied in two distinct zones, firstly in a first zone where the telescope 14 bears on the ice 4 and, secondly, in a second zone where the telescope 14 is 2. Since the ultrasonic energy is provided in two separate zones respectively corresponding to the welding of the telescope 14 on the glass 4 and to the welding of the telescope 14 on the middle part 2, the intensity of the ultrasonic energy provided in these two areas remains within acceptable limits that are not likely to cause deterioration of the internal components of the watch. This is not the case when ultrasonic energy is brought into a single zone to cause simultaneous welding of the telescope on the ice and the middle part. In such a case, the intensity of the applied ultrasonic energy is high and the risks of deteriorating the internal components of the watch are great.

Un dispositif d'affichage numérique est fixé sur la face inférieure 8 de la glace 4. A titre d'exemple non limitatif seulement, ce dispositif d'affichage numérique peut être une cellule d'affichage à cristal liquide 20 comprenant un substrat avant 22 et un substrat arrière 24 s'étendant parallèlement et à distance l'un de l'autre et réunis entre eux par un cadre de scellement (non visible au dessin) qui délimite un volume étanche pour le confinement du cristal liquide. Les deux substrats avant 22 et arrière 24 sont disposés entre un premier et un second polariseurs, respectivement 26 et 28, dont les directions de polarisation sont croisées. L'ensemble formé par les deux substrats 22 et 24 et les deux polariseurs 26 et 28 est collé au moyen d'une couche de colle optique 30 sur la face inférieure 8 de la glace de montre 4.A digital display device is attached to the lower face 8 of the lens 4. By way of non-limiting example only, this digital display device may be a liquid crystal display cell 20 comprising a front substrate 22 and a rear substrate 24 extending parallel and at a distance from one another and joined together by a sealing frame (not visible in the drawing) which delimits a sealed volume for the confinement of the liquid crystal. The two front and rear substrates 24 are arranged between a first and a second polarizer 26 and 28, respectively, whose polarization directions are crossed. The assembly formed by the two substrates 22 and 24 and the two polarizers 26 and 28 is glued by means of an optical adhesive layer 30 on the lower face 8 of the watch glass 4.

On voit à l'examen du dessin que les dimensions du substrat avant 22 excèdent celles du substrat arrière 24. Ceci permet de ménager une surface de contact 32 sur laquelle débouchent des pistes conductrices 34 pour la connexion électrique des électrodes de commande de la cellule d'affichage 20 avec les composants électroniques (non représentés) de commande de la cellule 20. Ces composants électroniques de commande sont montés sur une carte de circuit imprimé 36 disposée dans la boîte de montre 1, sous la cellule d'affichage 20 et à distance de celle-ci. Les pistes conductrices 34 pour la connexion électrique des électrodes de commande de la cellule d'affichage à cristal liquide 20 sont reliées à des pistes conductrices correspondantes 38 structurées à la surface de la carte de circuit imprimé 36 au moyen d'un connecteur élastomère 40 qui s'étend sensiblement verticalement. On rappelle qu'un connecteur élastomère, également connu sous sa dénomination commerciale de connecteur zébra, est un connecteur souple formé d'une pluralité de feuilles conductrices séparées les unes des autres par des feuilles isolantes en élastomère. Le montage est complété par un guide de lumière 42 qui prend appui sur la carte de circuit imprimé 36 et qui sert à l'éclairage par l'arrière ou rétro-éclairage de la cellule d'affichage à cristal liquide 20. On notera qu'à titre optionnel, le guide de lumière 42 comprend une fente 44 pour le guidage et le maintien vertical du connecteur zébra 40.It can be seen from the drawing that the dimensions of the front substrate 22 exceed those of the rear substrate 24. This makes it possible to provide a contact surface 32 on which conductive tracks 34 open for the electrical connection of the control electrodes of the control cell. 20 with the electronic control components (not shown) of the cell 20. These electronic control components are mounted on a printed circuit board 36 arranged in the watch case 1, under the display cell 20 and remotely. of it. The conductive tracks 34 for the electrical connection of the control electrodes of the liquid crystal display cell 20 are connected to corresponding conductive tracks 38 structured on the surface of the printed circuit board 36 by means of an elastomeric connector 40 which extends substantially vertically. It is recalled that an elastomeric connector, also known by its zebra connector trade name, is a flexible connector formed of a plurality of conductive sheets separated from each other by elastomeric insulating sheets. The assembly is completed by a light guide 42 which is supported on the printed circuit board 36 and which serves to illuminate the back or backlight of the liquid crystal display cell 20. It will be noted that optionally, the light guide 42 includes a slot 44 for guiding and holding the zebra connector 40 vertically.

Selon l'invention, le niveau de la portée 10 par rapport à la carte de circuit imprimé 36 est tel que lorsque la glace 4 est collée sur la carrure 2, le connecteur zébra 40 est comprimé. La partie comprimée du connecteur zébra 40 est représentée en pointillés sur la figure. Dans ce cas particulier, la présente invention trouve tout son intérêt. D'une part, du fait qu'une cellule à cristal liquide 20 est collée sur la face inférieure 8 de la glace 4, le fait de coller la glace 4 sur la carrure 2 évite tout risque d'endommagement de la cellule 20. D'autre part, étant donné que le connecteur zébra 40 est monté comprimé entre la cellule d'affichage à cristal liquide 20 et la carte de circuit imprimé 36, il tend à vouloir reprendre sa forme initiale et exerce sur la glace 4 une contrainte qui tend à décoller la glace 4 de la carrure 2. Par conséquent, en l'absence de la lunette 14 qui est soudée par ultrasons sur la carrure 2 à bref délai après le collage de la glace 4, il faudrait faire polymériser l'ensemble formé par la glace 4 et la carrure 2 pendant au moins vingt-quatre heures sous tension, ce qui compliquerait les opérations de fabrication et romprait le flux de production.According to the invention, the level of the span 10 relative to the printed circuit board 36 is such that when the glass 4 is bonded to the middle part 2, the zebra connector 40 is compressed. The compressed portion of the zebra connector 40 is shown in dashed lines in the figure. In this particular case, the present invention finds all its interest. On the one hand, because a liquid crystal cell 20 is stuck on the lower face 8 of the glass 4, sticking the glass 4 on the middle part 2 avoids any risk of damaging the cell 20. D on the other hand, since the zebra connector 40 is compressed between the liquid crystal display cell 20 and the printed circuit board 36, it tends to want to return to its original shape and exerts on the ice 4 a constraint which tends to to take off the ice 4 of the caseband 2. Therefore, in the absence of the telescope 14 which is ultrasonically welded to the middle part 2 shortly after the bonding of the ice 4, it would be necessary to polymerize the assembly formed by ice 4 and middle 2 for at least twenty-four hours under tension, which would complicate manufacturing operations and disrupt the flow of production.

Il va de soi que la présente invention n'est pas limitée aux modes de réalisation qui viennent d'être décrits et que diverses modifications et variantes simples peuvent être envisagées par l'homme du métier sans sortir du cadre de l'invention tel que défini par les revendications annexées.It goes without saying that the present invention is not limited to the embodiments which have just been described and that various modifications and simple variants can be envisaged by those skilled in the art without departing from the scope of the invention as defined by the appended claims.

Claims (3)

  1. Watch comprising a middle part (2) which, with a crystal (4), delimits a watch case (1), the crystal merely abutting on a shoulder (10) arranged in the watch middle part (2) to which the crystal is bonded, the watch comprising a bezel (14) ultrasonic welded both to the crystal (4) and to the watch middle part (2).
  2. Watch according to claim 1, characterized in that a digital display device (20) is fixed to the bottom face (8) of the crystal (4), a printed circuit board (36) being arranged in the watch case (1), underneath the digital display device (20) and at a distance therefrom, the digital display device (20) being electrically connected to the printed circuit board (36) by means of a zebra type electrical connector (40), the crystal (4) abutting on a shoulder (10) arranged in the watch middle part (2), the height of the shoulder (10) relative to the printed circuit board (36) being such that, when the crystal (4) is joined to the shoulder (10), the zebra connector (40) is compressed between the digital display device (20) and the printed circuit board (36).
  3. Method of securing a watch bezel (14), said watch comprising a middle part (2) which, with a crystal (4), delimits a watch case (1), the method being characterized in that it includes the steps consisting in bonding the crystal (4) to a shoulder (10) arranged in the watch middle part (2), the crystal (4) merely abutting on this shoulder (10), then in ultrasonic welding the bezel (14) both to the crystal (4) and to the watch middle part (2), the ultrasonic welding step being capable of being performed even though the bond is not yet dry, the ultrasonic energy being provided in two distinct areas, on the one hand in a first area where the bezel (14) is surface abutting the crystal (4), and on the other hand, in a second area where the bezel (14) is surface abutting the middle part (2).
EP12702547.6A 2011-02-08 2012-02-06 Watch including a bezel, and method for attaching such bezel Active EP2673676B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12702547.6A EP2673676B1 (en) 2011-02-08 2012-02-06 Watch including a bezel, and method for attaching such bezel

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP11153707A EP2485100A1 (en) 2011-02-08 2011-02-08 Watch including a bezel and method for attaching such a bezel
EP12702547.6A EP2673676B1 (en) 2011-02-08 2012-02-06 Watch including a bezel, and method for attaching such bezel
PCT/EP2012/051974 WO2012107408A1 (en) 2011-02-08 2012-02-06 Watch including a bezel, and method for attaching such bezel

Publications (2)

Publication Number Publication Date
EP2673676A1 EP2673676A1 (en) 2013-12-18
EP2673676B1 true EP2673676B1 (en) 2016-10-26

Family

ID=44279790

Family Applications (2)

Application Number Title Priority Date Filing Date
EP11153707A Withdrawn EP2485100A1 (en) 2011-02-08 2011-02-08 Watch including a bezel and method for attaching such a bezel
EP12702547.6A Active EP2673676B1 (en) 2011-02-08 2012-02-06 Watch including a bezel, and method for attaching such bezel

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP11153707A Withdrawn EP2485100A1 (en) 2011-02-08 2011-02-08 Watch including a bezel and method for attaching such a bezel

Country Status (5)

Country Link
US (1) US9501039B2 (en)
EP (2) EP2485100A1 (en)
JP (1) JP3188804U (en)
CN (1) CN203673244U (en)
WO (1) WO2012107408A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2784607B1 (en) * 2013-03-28 2017-01-18 ETA SA Manufacture Horlogère Suisse Watch comprising a flange
JP6531754B2 (en) * 2016-12-21 2019-06-19 カシオ計算機株式会社 Equipment case and watch

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3861531D1 (en) * 1987-03-23 1991-02-21 Ebauchesfabrik Eta Ag WATCH HOUSING, UNIT FOR THE PRODUCTION THEREOF AND METHOD FOR BUILDING THIS UNIT.
US6053631A (en) * 1992-11-19 2000-04-25 Createc Patent Holding S.A. Plastic case with a support body for an electronic device
JPH1115394A (en) * 1997-06-20 1999-01-22 Casio Comput Co Ltd Electronic part, electronic apparatus, and watch using them
JP2003215278A (en) 2002-01-24 2003-07-30 Seiko Instruments Inc Electronic watch
MXPA02003689A (en) * 2002-03-01 2004-04-05 Fossil Inc Improved timepiece.
EP1722283A1 (en) * 2005-05-11 2006-11-15 ETA SA Manufacture Horlogère Suisse Watch provided with means to improve crystal resistance against shocks

Also Published As

Publication number Publication date
EP2673676A1 (en) 2013-12-18
US9501039B2 (en) 2016-11-22
US20130329535A1 (en) 2013-12-12
JP3188804U (en) 2014-02-13
CN203673244U (en) 2014-06-25
EP2485100A1 (en) 2012-08-08
WO2012107408A1 (en) 2012-08-16

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