EP0549978B1 - Method for fitting a glass onto a watch-case and timepiece with means for placing in position a glass onto a case - Google Patents

Method for fitting a glass onto a watch-case and timepiece with means for placing in position a glass onto a case Download PDF

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Publication number
EP0549978B1
EP0549978B1 EP92121593A EP92121593A EP0549978B1 EP 0549978 B1 EP0549978 B1 EP 0549978B1 EP 92121593 A EP92121593 A EP 92121593A EP 92121593 A EP92121593 A EP 92121593A EP 0549978 B1 EP0549978 B1 EP 0549978B1
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EP
European Patent Office
Prior art keywords
notch
crystal
case
caseband
onto
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP92121593A
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German (de)
French (fr)
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EP0549978A1 (en
Inventor
Yves Meystre
Olivier Koch
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ETA Manufacture Horlogere Suisse SA
Ebauchesfabrik ETA AG
Original Assignee
ETA Manufacture Horlogere Suisse SA
Ebauchesfabrik ETA AG
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Publication date
Application filed by ETA Manufacture Horlogere Suisse SA, Ebauchesfabrik ETA AG filed Critical ETA Manufacture Horlogere Suisse SA
Publication of EP0549978A1 publication Critical patent/EP0549978A1/en
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Publication of EP0549978B1 publication Critical patent/EP0549978B1/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
    • G04B37/00—Cases
    • 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
    • G04B39/025—Sealing crystals or glasses without special sealing parts

Definitions

  • the present invention relates to a method for assembling a crystal on a watch case with a predetermined relative angular positioning.
  • It also relates to a timepiece comprising means for positioning an ice cream on a box.
  • the invention relates assembly and positioning of a glass plastic on a watch case made of a material of the same type, the glass being thermo-welded on the box by a technique such as ultrasonic welding.
  • the glass is integral a ring provided with a clearance in which comes engage a protrusion of a seal placed between the ring and the middle of the box.
  • Japanese patent application published after examination under number 53-25261 instead provides an example of simple but apparent system.
  • the ice plastic which carries on an internal annular face a graduation to serve at the same time as a dial, is angularly positioned relative to the box in plastic and to the movement of the watch it makes part, thanks to two opposite projecting parts of which this ice is provided and which each engage between two horns of the box.
  • US Patent No. 4,229,936 relates to a set including a watch case and a bracelet plastic which are made in one piece and in which the box is designed to receive a module digital watch.
  • module control box present on one of its sides of the thicker parts than the rest, which extend axially and form protuberances external and internal.
  • the internal protuberances which penetrate into corresponding grooves of the module when it is placed in the box allow no only act on the contacts that are in these grooves but also to maintain the module in a determined angular position.
  • This document also indicates how a mirror can be fixed on the box by through a headdress but there is no question of angularly position this glass relative to the box and module.
  • the present invention therefore aims to provide a process for assembling an ice cream on a box of watch and a timepiece provided with means of angular positioning of this glass on the box free from the aforementioned defects.
  • the coin timepiece according to the invention comprises a box 1 comprising a middle part 2 and a bezel 4 produced in this example in one and the same piece and forming a whole monobloc.
  • This timepiece also has a crystal 6 which is mounted on the box 1.
  • the glass 6 and the box 1 in this example are made of materials heat-sealable thermoplastics. Ice 6 is made for example in a transparent acrylic resin (PMMA) commonly known as "Plexiglas".
  • PMMA transparent acrylic resin
  • the box as for it is made of one of the materials designated by the abbreviations ABS, ASA, or SAN. These materials correspond respectively to an acryl butadiene styrene, to an acryl ester and to a styrene acryl nitrile. Enter here glass 6 and box 1 is interposed a dial 8.
  • Glass 6 has a chamfered peripheral edge 10 flaring outwards and intended to engage in a circular groove 12 ( Figures 1 and 4) formed in box 1.
  • edge 10 is intended to be thermo-welded on the box 1, in particular by an ultrasound technique.
  • the glass 6 has a notch of positioning 14 constituted at least in its part upper by a V-groove which extends radially to the glass 6 and which is formed in the edge 10.
  • This notch 14 has at least in its part superior an isosceles triangle shape presenting a vertex angle A (figure 3) having a chosen value between 85 ° and 95 °. Preferably, the angle A has a value of 90 °.
  • the notch 14 is therefore formed in a radial position outermost on edge 10 and it opens out laterally, externally and internally by compared to ice 6.
  • the box 1 has a middle part 2 which is extended by horns 18 allowing the attachment of a bracelet not shown and which has a bottom 20.
  • the box 1 has a groove or circular groove 12 intended to form a zone welding with the edge 10 of the glass 6.
  • the box 1 comprises a positioning protuberance 22 formed on this box, and in particular on its middle 2.
  • This protuberance 22 which is produced in the groove or groove 12 at least partly has a form of isosceles triangle with an angle at the vertex B (figure 5) approximately 80 °.
  • FIG. 6 represents the glass 6 positioned on the box 1 before the welding operation of these two elements one over the other.
  • the protuberance 22 which presents at least in its part upper a bevel shape extends towards the glass 6 of normal to box 1.
  • notch 14 flares next to the box 1.
  • the mounting of the glass 6 on the box 1 is made by positioning the glass 6 above from box 1, then introducing edge 10 into the groove or groove 12.
  • the glass 6 is turned in a clockwise or anti-clockwise rotation until the notch 14 comes into coincidence with the protrusion 22 and adjusts to it.
  • Figure 1 shows the timepiece assembled with the notch 14 and the protrusion 22 forming a fusion zone F. We therefore understand that in this state, the notch 14 and the protrusion 22 are welded one to the other.
  • the fusion zone extends annularly over the timepiece since edge 10 is on all of its circumference thermo-welded to the middle 2, in the groove or groove 12. This fusion obtained by welding the two materials form means for fixing the glass 6 to box 1.
  • the notch 14 and the protrusion 22 form means of positioning which in this timepiece make therefore an integral part of the aforementioned fixing means.
  • the assembly method according to the invention is the following.
  • a protuberance 22 which, as explained, is shape corresponding to the notch 14, namely a triangle isosceles, and which is shaped to be able to engage in this one.
  • This process as well as the means of the invention which just described have turned out after many tests, ensure perfect angular positioning of the ice on the box, without any of these components be visible from the outside of the finished part, for example from the top of the ice.
  • this invention is simple and inexpensive, since the notch 14 and the protrusion 22 can be performed without operation additional manufacturing, but only during molding, for example during injection operations ice and box respectively.
  • the glass provided with its notch 14 can fit on boxes without protuberance, which allows better adaptability and excellent flexibility assembly stations in manufacturing.

Abstract

The invention relates to a method for fitting a glass onto a watch case, a timepiece comprising means for placing in position a glass on a case, as well as a glass and a case intended to equip such a piece. The timepiece according to the invention includes: - a case (1), - a glass (6) mounted on the case (1), - means for fixing the glass to the case, and - means for angular positioning of this glass on the said case, this piece being characterised in that the means for angular positioning consist, on the one hand, of a notch (14) made directly on the glass (6) and, on the other hand, of a protuberance (22) which is made directly on the case (1) and which is engaged into the said notch (14). The invention applies for example to timepieces including a glass and a case made from heat-weldable thermoplastic material. <IMAGE>

Description

La présente invention concerne un procédé pour l'assemblage d'une glace sur une boíte de montre avec un positionnement angulaire relatif prédéterminé.The present invention relates to a method for assembling a crystal on a watch case with a predetermined relative angular positioning.

Elle concerne également une pièce d'horlogerie comprenant des moyens de positionnement d'une glace sur une boíte.It also relates to a timepiece comprising means for positioning an ice cream on a box.

Plus particulièrement, l'invention concerne l'assemblage et le positionnement d'une glace en matière plastique sur une boíte de montre réalisée en un matériau du même type, la glace étant thermo-soudée sur la boíte par une technique telle que le soudage aux ultrasons.More particularly, the invention relates assembly and positioning of a glass plastic on a watch case made of a material of the same type, the glass being thermo-welded on the box by a technique such as ultrasonic welding.

Une technique de soudage de ce type est décrite dans le brevet européen EP 0101663.A welding technique of this type is described in European patent EP 0101663.

Par ailleurs, on connaít déjà des systèmes d'assemblage permettant un positionnement angulaire prédéterminé d'une glace sur une boíte ainsi que des moyens de positionnement pour cet assemblage.In addition, we already know systems assembly allowing angular positioning predetermined ice cream on a box as well as positioning means for this assembly.

Toutefois, ces systèmes présentent l'inconvénient majeur d'être de structure complexe ou d'être visibles de l'extérieur de la montre.However, these systems have the disadvantage major to be of complex structure or to be visible from the outside of the watch.

Parmi les systèmes compliqués, il y a par exemple celui qui est décrit dans le modèle d'utilité japonais No 1 188 529. Dans ce système, la glace est solidaire d'une bague munie d'un dégagement dans lequel vient s'engager une saillie d'un joint d'étanchéité placé entre la bague et la carrure de la boíte.Among the complicated systems, there are for example the one described in the Japanese utility model No 1 188 529. In this system, the glass is integral a ring provided with a clearance in which comes engage a protrusion of a seal placed between the ring and the middle of the box.

La demande de brevet japonais publiée après examen sous le numéro 53-25261 fournit au contraire un exemple de système simple mais apparent. Dans ce document, la glace en plastique, qui porte sur une face annulaire interne une graduation pour servir en même temps de cadran, est positionnée angulairement par rapport à la boíte en plastique et au mouvement de la montre dont elle fait partie, grâce à deux parties saillantes opposées dont cette glace est munie et qui s'engagent chacune entre deux cornes de la boíte.Japanese patent application published after examination under number 53-25261 instead provides an example of simple but apparent system. In this document, the ice plastic, which carries on an internal annular face a graduation to serve at the same time as a dial, is angularly positioned relative to the box in plastic and to the movement of the watch it makes part, thanks to two opposite projecting parts of which this ice is provided and which each engage between two horns of the box.

Cela dit, on connaít également, grâce au brevet suisse n° 310 554, des moyens de positionnement d'une glace dans une boíte de montre qui sont constitués par des rebords annulaires tronconiques sur la glace et à l'intérieur de la boíte mais ces moyens ne permettent qu'un positionnement axial de la glace et non pas un positionnement angulaire de celle-ci.That said, we also know, thanks to the patent Switzerland n ° 310 554, means of positioning a ice in a watch case which consist of frustoconical annular edges on the ice and at inside the box but these means do not allow that an axial positioning of the glass and not a angular positioning thereof.

Enfin, le brevet US No 4 229 936 a pour objet un ensemble comprenant une boíte de montre et un bracelet en plastique qui sont réalisés en une seule pièce et dans lequel la boíte est prévue pour recevoir un module de montre digitale. Pour permettre d'actionner des contacts de commande du module la boíte présente sur l'un de ses côtés des parties plus épaisses que le reste, qui s'étendent axialement et qui forment des protubérances externes et internes. Les protubérances internes qui pénètrent dans des gorges correspondantes du module lorsque celui-ci est placé dans la boíte permettent non seulement d'agir sur les contacts qui se trouvent dans ces gorges mais également de maintenir le module dans une position angulaire déterminée. Ce document indique aussi comment une glace peut être fixée sur la boíte par l'intermédiaire d'une coiffe mais il n'est pas question de positionner angulairement cette glace par rapport à la boíte et au module.Finally, US Patent No. 4,229,936 relates to a set including a watch case and a bracelet plastic which are made in one piece and in which the box is designed to receive a module digital watch. To activate contacts module control box present on one of its sides of the thicker parts than the rest, which extend axially and form protuberances external and internal. The internal protuberances which penetrate into corresponding grooves of the module when it is placed in the box allow no only act on the contacts that are in these grooves but also to maintain the module in a determined angular position. This document also indicates how a mirror can be fixed on the box by through a headdress but there is no question of angularly position this glass relative to the box and module.

La présente invention a donc pour but de fournir un procédé pour l'assemblage d'une glace sur une boíte de montre et une pièce d'horlogerie pourvue de moyens de positionnement angulaire de cette glace sur la boíte exempts des défauts susmentionnés. The present invention therefore aims to provide a process for assembling an ice cream on a box of watch and a timepiece provided with means of angular positioning of this glass on the box free from the aforementioned defects.

A cet effet, l'invention a pour objet un procédé, d'assemblage d'une glace sur une boíte qui comporte au moins une carrure, caractérisé en ce qu'il consiste :

  • (a) d'une part, à ménager une encoche de positionnement directement dans un bord de la glace destiné à être fixé sur la carrure,
  • (b) d'autre part, à ménager directement sur la carrure de la boíte une protubérance qui est de forme correspondante à celle de ladite encoche et qui est conformée pour pouvoir s'engager dans celle-ci, puis
  • (c) à amener la glace sur la carrure et à mettre en coïncidence par rotation ladite encoche et ladite protubérance pour permettre leur engagement angulaire relatif et autoriser la fixation de la glace sur la boíte.
To this end, the subject of the invention is a method of assembling a lens on a box which comprises at least one middle part, characterized in that it consists:
  • (a) on the one hand, to provide a positioning notch directly in an edge of the crystal intended to be fixed on the middle part,
  • (b) on the other hand, to provide directly on the middle of the box a protuberance which is of shape corresponding to that of said notch and which is shaped to be able to engage therein, then
  • (C) to bring the ice on the middle part and to put in coincidence by rotation said notch and said protuberance to allow their relative angular engagement and authorize the fixing of the ice on the box.

L'invention a aussi pour objet une pièce d'horlogerie du type comprenant :

  • une boíte comportant au moins une carrure,
  • une glace montée sur la boíte,
  • des moyens de fixation de la glace sur la carrure de la boíte, et
  • des moyens de positionnement angulaire de cette glace sur ladite boíte, cette pièce étant caractérisée en ce que les moyens de positionnement angulaire sont constitués, d'une part, par une encoche ménagée directement dans un bord de la glace et, d'autre part, par une protubérance qui est directement ménagée sur la carrure de la boíte et qui est engagée dans ladite encoche.
The subject of the invention is also a timepiece of the type comprising:
  • a box comprising at least one middle part,
  • an ice cream mounted on the box,
  • means for fixing the glass to the middle of the box, and
  • means for angular positioning of this glass on said box, this part being characterized in that the angular positioning means consist, on the one hand, of a notch formed directly in an edge of the glass and, on the other hand, by a protuberance which is directly formed on the middle of the box and which is engaged in said notch.

D'autres caractéristiques et avantages de l'invention apparaítront à la lecture de la description détaillée qui suit, faite en référence aux dessins annexés qui sont donnés uniquement à titre d'exemple, et dans lesquels :

  • la figure 1 est une vue partielle en coupe d'une pièce d'horlogerie assemblée comportant une glace positionnée et montée sur une boíte par l'intermédiaire du procédé d'assemblage et des moyens de positionnement selon l'invention;
  • la figure 2 est une vue partielle en coupe de la glace seule, faite dans la partie de cette glace représentée par la flèche II de la figure 1;
  • la figure 3 est une vue partielle latérale de la même glace, faite selon la flèche III de la figure 2;
  • la figure 4 est une vue partielle de dessus de la boíte de la pièce d'horlogerie de la figure 1;
  • la figure 5 est une vue partielle en coupe faite selon les flèches V-V de la figure 4; et
  • la figure 6 est une vue similaire à la figure 5, mais représentant la glace des figures 2 et 3 positionnée sur la boíte des figures 4 et 5, et prête à être thermo-soudée sur cette boíte.
Other characteristics and advantages of the invention will appear on reading the detailed description which follows, given with reference to the appended drawings which are given solely by way of example, and in which:
  • Figure 1 is a partial sectional view of an assembled timepiece comprising a crystal positioned and mounted on a box by means of the assembly process and positioning means according to the invention;
  • Figure 2 is a partial sectional view of the glass alone, made in the part of this glass represented by arrow II of Figure 1;
  • Figure 3 is a partial side view of the same glass, made according to arrow III of Figure 2;
  • Figure 4 is a partial top view of the box of the timepiece of Figure 1;
  • Figure 5 is a partial sectional view taken along the arrows VV of Figure 4; and
  • Figure 6 is a view similar to Figure 5, but showing the glass of Figures 2 and 3 positioned on the box of Figures 4 and 5, and ready to be thermo-welded on this box.

Comme on le voit sur la figure 1, la pièce d'horlogerie selon l'invention comprend une boíte 1 comportant une carrure 2 et une lunette 4 réalisées dans cet exemple en une et même pièce et formant un ensemble monobloc.As seen in Figure 1, the coin timepiece according to the invention comprises a box 1 comprising a middle part 2 and a bezel 4 produced in this example in one and the same piece and forming a whole monobloc.

Cette pièce d'horlogerie comporte de plus une glace 6 qui est montée sur la boíte 1. La glace 6 et la boíte 1 sont réalisées dans cet exemple en des matériaux thermoplastiques thermo-soudables. La glace 6 est réalisée par exemple en une résine transparente acrylique (PMMA) communément désignée sous la marque "Plexiglas". La boíte quant à elle est réalisée en un des matériaux désignés par les abréviations ABS, ASA, ou SAN. Ces matériaux correspondent respectivement à un acryl butadiène styrène, à un acryl-ester et à un styrène acryl nitrile. Entre la glace 6 et la boíte 1 est interposé un cadran 8.This timepiece also has a crystal 6 which is mounted on the box 1. The glass 6 and the box 1 in this example are made of materials heat-sealable thermoplastics. Ice 6 is made for example in a transparent acrylic resin (PMMA) commonly known as "Plexiglas". The box as for it is made of one of the materials designated by the abbreviations ABS, ASA, or SAN. These materials correspond respectively to an acryl butadiene styrene, to an acryl ester and to a styrene acryl nitrile. Enter here glass 6 and box 1 is interposed a dial 8.

Sous le cadran 8 et dans la boíte 1 est logé un mouvement horométrique classique M représenté ici de façon symbolique en traits mixtes interrompus.Under the dial 8 and in the box 1 is housed a classic horometric movement M represented here so symbolic in broken dashed lines.

On se référera désormais aux figures 2 et 3 qui représentent de façon plus détaillée une glace 6 destinée à équiper une pièce d'horlogerie selon l'invention.We will now refer to Figures 2 and 3 which show in more detail an ice 6 intended to equip a timepiece according to the invention.

La glace 6 comporte un bord périphérique chanfreiné 10 s'évasant vers l'extérieur et destiné à venir s'engager dans une gorge circulaire 12 (figures 1 et 4) ménagée dans la boíte 1. Comme cela est décrit de façon plus détaillée dans le brevet européen susmentionné, le bord 10 est destiné à être thermo-soudé sur la boíte 1, notamment par une technique aux ultrasons.Glass 6 has a chamfered peripheral edge 10 flaring outwards and intended to engage in a circular groove 12 (Figures 1 and 4) formed in box 1. As described in more detail in the aforementioned European patent, edge 10 is intended to be thermo-welded on the box 1, in particular by an ultrasound technique.

On remarquera que la glace 6 comporte une encoche de positionnement 14 constituée au moins dans sa partie supérieure par une rainure en V qui s'étend radialement à la glace 6 et qui est ménagée dans le bord 10.It will be noted that the glass 6 has a notch of positioning 14 constituted at least in its part upper by a V-groove which extends radially to the glass 6 and which is formed in the edge 10.

Cette encoche 14 présente au moins dans sa partie supérieure une forme de triangle isocèle présentant un angle au sommet A (figure 3) ayant une valeur choisie entre 85° et 95°. De préférence, l'angle A a une valeur de 90°. L'encoche 14 est donc ménagée en une position radiale la plus extérieure sur le bord 10 et elle débouche de façon latérale, extérieurement et intérieurement par rapport à la glace 6.This notch 14 has at least in its part superior an isosceles triangle shape presenting a vertex angle A (figure 3) having a chosen value between 85 ° and 95 °. Preferably, the angle A has a value of 90 °. The notch 14 is therefore formed in a radial position outermost on edge 10 and it opens out laterally, externally and internally by compared to ice 6.

On se référera désormais aux figures 4 et 5 qui représentent de façon plus détaillée une boíte 1 destinée à équiper une pièce d'horlogerie selon l'invention.We will now refer to Figures 4 and 5 which show in more detail a box 1 intended to equip a timepiece according to the invention.

La boíte 1 comporte une carrure 2 qui est prolongée par des cornes 18 permettant la fixation d'un bracelet non représenté et qui comporte un fond 20. The box 1 has a middle part 2 which is extended by horns 18 allowing the attachment of a bracelet not shown and which has a bottom 20.

Comme mentionné ci-dessus, la boíte 1 présente une gorge ou rainure circulaire 12 destinée à former une zone de soudage avec le bord 10 de la glace 6.As mentioned above, the box 1 has a groove or circular groove 12 intended to form a zone welding with the edge 10 of the glass 6.

Selon l'invention, la boíte 1 comporte une protubérance de positionnement 22 ménagée sur cette boíte, et notamment sur sa carrure 2.According to the invention, the box 1 comprises a positioning protuberance 22 formed on this box, and in particular on its middle 2.

Cette protubérance 22 qui est réalisée dans la rainure ou gorge 12 a au moins en partie une forme de triangle isocèle présentant un angle au sommet B (figure 5) de 80° environ.This protuberance 22 which is produced in the groove or groove 12 at least partly has a form of isosceles triangle with an angle at the vertex B (figure 5) approximately 80 °.

La figure 6 représente la glace 6 positionnée sur la boíte 1 avant l'opération de soudage de ces deux éléments l'un sur l'autre. On remarque donc sur cette figure que la protubérance 22 qui présente au moins dans sa partie supérieure une forme en biseau s'étend vers la glace 6 de façon normale à la boíte 1.FIG. 6 represents the glass 6 positioned on the box 1 before the welding operation of these two elements one over the other. We therefore notice in this figure that the protuberance 22 which presents at least in its part upper a bevel shape extends towards the glass 6 of normal to box 1.

Plus particulièrement, on remarque que l'encoche 14 s'évase en regard de la boíte 1.More particularly, we note that the notch 14 flares next to the box 1.

Ainsi, on comprend que le montage de la glace 6 sur la boíte 1 est effectué en positionnant la glace 6 au-dessus de la boíte 1, puis en introduisant le bord 10 dans la gorge ou rainure 12. La glace 6 est tournée dans un sens de rotation horaire ou anti-horaire jusqu'à ce que l'encoche 14 vienne en coïncidence avec la protubérance 22 et s'ajuste sur celle-ci.Thus, it is understood that the mounting of the glass 6 on the box 1 is made by positioning the glass 6 above from box 1, then introducing edge 10 into the groove or groove 12. The glass 6 is turned in a clockwise or anti-clockwise rotation until the notch 14 comes into coincidence with the protrusion 22 and adjusts to it.

On effectue ensuite l'opération de soudage aux ultrasons par l'intermédiaire d'une sonotrode, non représentée, comme expliqué en détail dans le document susmentionné EP 0101663.The welding operation is then carried out ultrasound via a sonotrode, not shown, as explained in detail in the document mentioned above EP 0101663.

La figure 1 représente la pièce d'horlogerie assemblée avec l'encoche 14 et la protubérance 22 formant une zone de fusion F. On comprend donc que dans cet état, l'encoche 14 et la protubérance 22 sont soudées l'une à l'autre.Figure 1 shows the timepiece assembled with the notch 14 and the protrusion 22 forming a fusion zone F. We therefore understand that in this state, the notch 14 and the protrusion 22 are welded one to the other.

La zone de fusion s'étend de façon annulaire sur la pièce d'horlogerie puisque le bord 10 est sur tout son pourtour thermo-soudé à la carrure 2, dans la gorge ou rainure 12. Cette fusion obtenue par soudage des deux matériaux forme des moyens de fixation de la glace 6 sur la boíte 1.The fusion zone extends annularly over the timepiece since edge 10 is on all of its circumference thermo-welded to the middle 2, in the groove or groove 12. This fusion obtained by welding the two materials form means for fixing the glass 6 to box 1.

L'encoche 14 et la protubérance 22 forment des moyens de positionnement qui dans cette pièce d'horlogerie font donc partie intégrante des moyens de fixation précités.The notch 14 and the protrusion 22 form means of positioning which in this timepiece make therefore an integral part of the aforementioned fixing means.

Le procédé d'assemblage selon l'invention est le suivant.The assembly method according to the invention is the following.

Tout d'abord, on ménage d'une part directement dans la glace 6 l'encoche de positionnement 14 qui vient par exemple de moulage avec cette glace. Plus particulièrement, on ménage cette encoche 14 dans le bord 10 de la glace 6 en conformant cette encoche 14 au moins dans sa partie supérieure sous une forme de V qui s'étend en direction radiale par rapport à la glace et qui s'évase vers une extrémité libre E de celle-ci.First of all, on the one hand, we directly the glass 6 the positioning notch 14 which comes through example of molding with this ice. More particularly, we spare this notch 14 in the edge 10 of ice 6 by conforming this notch 14 at least in its upper part in the form of a V which extends in radial direction with respect to the glass and which flares towards a free end E thereof.

D'autre part, on ménage directement sur la boíte 1 une protubérance 22 qui, comme on l'a expliqué, est de forme correspondante à l'encoche 14, à savoir en triangle isocèle, et qui est conformée pour pouvoir s'engager dans celle-ci.On the other hand, we clean directly on the box 1 a protuberance 22 which, as explained, is shape corresponding to the notch 14, namely a triangle isosceles, and which is shaped to be able to engage in this one.

Dans ces étapes, on donne à l'encoche 14 et à la protubérance 22 leurs angles respectifs A et B de 90° et 80°.In these steps, we give the notch 14 and the protrusion 22 their respective angles A and B of 90 ° and 80 °.

Ensuite, on amène la glace 6 sur la boíte 1 en mettant en coïncidence l'encoche 14 et la protubérance 22 pour permettre leur engagement relatif et autoriser la fixation de la glace 6 sur la boíte 1.Then, we bring the ice 6 on the box 1 in bringing the notch 14 and the protrusion 22 into coincidence to allow their relative engagement and authorize the fixing the glass 6 to the box 1.

Enfin, on procède au thermo-soudage en soudant l'ensemble encoche 14 et protubérance 22 de façon simultanée au thermo-soudage du bord libre 10 de la glace 6 sur la boíte 1.Finally, we heat seal by welding the whole notch 14 and protrusion 22 so simultaneous with heat sealing of the free edge 10 of the glass 6 on box 1.

Ce procédé ainsi que les moyens de l'invention qui viennent d'être décrits se sont révélés, après de nombreux essais, assurer un positionnement angulaire parfait de la glace sur la boíte, sans qu'aucune de ces composants ne soit visible de l'extérieur de la pièce finie, par exemple depuis le haut de la glace. De plus, cette invention est simple et peu coûteuse, puisque l'encoche 14 et la protubérance 22 peuvent être réalisées sans opération supplémentaire de fabrication, mais uniquement lors du moulage, par exemple lors des opérations d'injection respectivement de la glace et de la boíte.This process as well as the means of the invention which just described have turned out after many tests, ensure perfect angular positioning of the ice on the box, without any of these components be visible from the outside of the finished part, for example from the top of the ice. In addition, this invention is simple and inexpensive, since the notch 14 and the protrusion 22 can be performed without operation additional manufacturing, but only during molding, for example during injection operations ice and box respectively.

De plus, la glace munie de son encoche 14 peut s'adapter sur des boítes sans protubérance, ce qui permet une meilleure adaptabilité et une excellente flexibilité des postes de montage en fabrication.In addition, the glass provided with its notch 14 can fit on boxes without protuberance, which allows better adaptability and excellent flexibility assembly stations in manufacturing.

Claims (15)

  1. Method for mounting, with a predetermined relative angular position, a crystal on a watch case comprising at least a caseband (2), characterized in that it consists :
    (a) on the one hand, of providing a positioning notch (14) directly on an edge (10) of the crystal (6) intended to be secured onto the caseband (2),
    (b) on the other hand, of providing a protuberance (22) directly on the caseband (2) of the case (1) having a form corresponding to that of said notch (14) and which is shaped so as to be engageable therein, then
    (c) of bringing the crystal (6) onto the caseband (2) while placing by rotation said notch (14) and said protuberance (22) into coincidence in order to allow their angular relative engagement and permit securing the crystal (6) onto the case (1).
  2. Method according to claim 1, characterized in that it consists in step (a) of shaping said notch (14), at least in its upper portion, in a V form extending in a radial direction relative to the crystal (6) and opening out towards a free extremity (E) thereof.
  3. Method according to claim 2, characterized in that said notch (14) is shaped in the form of an isosceles triangle exhibiting a summit angle (A) of about 90°.
  4. Method according to claim 3, characterized in that in step (B) said protuberance (22) is shaped, at least in its upper portion, in the form of an isosceles triangle exhibiting a summit angle (B) of about 80°.
  5. Method according to any one of the preceding claims, in which the crystal (6) and the caseband (2) are formed of heat-weldable materials, characterized in that, following step (c), the crystal (6) is heat welded onto the caseband (2) through its edge which is brought to amalgamate with the material of said caseband (2), said notch (14) and said protuberance (22) being likewise heat welded simultaneously with the heat welding of the edge of the crystal (6) onto the caseband (2).
  6. Timepiece of the type comprising:
    a case (1) comprising at least a caseband (2),
    a crystal (6) mounted on the case (1),
    means for securing the crystal (6) onto the caseband (2) of the case (1), and
    angular positioning means for such crystal (6) onto said caseband (2),
       characterized in that the angular positioning means are made up, on the one hand, of a notch (14) provided directly on an edge (10) of the crystal (6) and, on the other hand, of a protuberance (22) which is directly provided on the caseband (2) of the case (1) and which is engaged in said notch (14).
  7. Timepiece according to claim 6, characterized in that said notch (14) is provided on an edge of the crystal (6) in an outermost radial position thereon.
  8. Timepiece according to claim 6 or 7, characterized in that said notch (14) opens out laterally, exteriorly and interiorly relative to the crystal (6).
  9. Timepiece according to claim 7 or 8, characterized in that said notch (14), at least in its upper portion, is made up of a V groove extending radially to the crystal (6) and opening out facing the case (1).
  10. Timepiece according to claim 9, characterized in that said notch (14) exhibits the form of an isosceles triangle.
  11. Timepiece according to claim 10, characterized in that the summit angle (A) of the notch (14) is chosen to be between 85° and 95°.
  12. Timepiece according to claim 11, characterized in that the summit angle (A) of the notch (14) is 90°.
  13. Timepiece according to claim 11 or 12, characterized in that the protuberance (22) exhibits, at least in its upper portion, an isosceles triangle form the summit angle (B) of which is of about 80°.
  14. Timepiece according to any of claims 6 to 13, characterized in that the positioning means (14, 22) form an integral part of the means for securing the crystal (6) onto the caseband (2) of the case (1).
  15. Timepiece according to claim 14 in which the caseband (2) and the crystal (6) are formed of heat-weldable materials, characterized in that the notch (14) and the protuberance (22) are welded to one another.
EP92121593A 1991-12-28 1992-12-18 Method for fitting a glass onto a watch-case and timepiece with means for placing in position a glass onto a case Expired - Lifetime EP0549978B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3860/91A CH683482B5 (en) 1991-12-28 1991-12-28 A method for assembling a mirror on a watch case, comprising timepiece means for positioning of a lens on a box, and lens intended to equip such a part.
CH3860/91 1991-12-28

Publications (2)

Publication Number Publication Date
EP0549978A1 EP0549978A1 (en) 1993-07-07
EP0549978B1 true EP0549978B1 (en) 1998-05-27

Family

ID=4265030

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92121593A Expired - Lifetime EP0549978B1 (en) 1991-12-28 1992-12-18 Method for fitting a glass onto a watch-case and timepiece with means for placing in position a glass onto a case

Country Status (12)

Country Link
EP (1) EP0549978B1 (en)
JP (1) JPH05264750A (en)
KR (1) KR930013896A (en)
CN (1) CN1037377C (en)
AT (1) ATE166731T1 (en)
AU (1) AU665966B2 (en)
BR (1) BR9205175A (en)
CA (1) CA2084953A1 (en)
CH (1) CH683482B5 (en)
DE (1) DE69225687D1 (en)
MX (1) MX9207262A (en)
TW (1) TW223684B (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1046968B1 (en) 1999-04-22 2008-11-26 ETA SA Manufacture Horlogère Suisse Means for interconnecting a crystal, a dial and a case-ring in a timepiece
DE69935656T2 (en) * 1999-04-22 2007-12-13 Eta Sa Manufacture Horlogère Suisse Method for mounting a housing ring in a watch case and housing ring that can be used for this purpose
JP5493527B2 (en) 2009-07-14 2014-05-14 セイコーエプソン株式会社 Clock with wireless function
EP2579106A1 (en) 2011-10-04 2013-04-10 ETA SA Manufacture Horlogère Suisse Shaping of an integral transparent clock component
EP2584413B1 (en) * 2011-10-21 2014-08-13 ETA SA Manufacture Horlogère Suisse Method for attaching a glass to a middle of a watch case
JP5741734B2 (en) * 2014-03-06 2015-07-01 セイコーエプソン株式会社 Clock with wireless function
CN208557082U (en) 2014-08-27 2019-03-01 苹果公司 A kind of electronic equipment and lid for electronic equipment
EP3293587B1 (en) * 2016-09-09 2020-02-19 Montres Tudor S.A. Watch glass
CN106298685B (en) * 2016-09-29 2019-01-04 中国船舶重工集团公司第七一九研究所 A kind of electronic chip packaging structure using ultrasonic bonding
KR101893166B1 (en) * 2017-04-28 2018-08-29 엘지전자 주식회사 The mobile terminal module and the watch type mobile terminal

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2222911A (en) * 1938-10-10 1940-11-26 Morf Ernest Watch crystal
CH310554A (en) * 1953-04-21 1955-10-31 Froidevaux Andre Housing for a measuring instrument, in particular a watch.
US2871654A (en) * 1954-04-14 1959-02-03 Bulova Watch Co Inc Waterproof watch-case
CH356414A (en) * 1959-08-08 1961-08-15 Schlunegger Paul Faceted glass
DE7000980U (en) * 1970-01-13 1970-04-23 Blessing Werke Kg CLOCK
DE7004514U (en) * 1970-02-10 1970-06-18 Richard Hoerl Uhren Juwelen Ku GLASS LID FOR WALL AND TABLE CLOCKS.
US4229936A (en) * 1977-04-19 1980-10-28 Fairchild Camera And Instrument Corporation Low-cost watch case and band
CH650894GA3 (en) * 1982-08-12 1985-08-30 Ebauchesfabrik Eta Ag
IT8320781V0 (en) * 1983-02-11 1983-02-11 Barbieri Raul Marianelli Giorg WALL CLOCK, MODULAR.
CH671671B5 (en) * 1988-03-23 1990-03-30 Ebauchesfabrik Eta Ag
CN1026620C (en) * 1989-02-17 1994-11-16 西铁城钟表株式会社 Fixing method for plastic case of watch and windscreen

Also Published As

Publication number Publication date
TW223684B (en) 1994-05-11
AU665966B2 (en) 1996-01-25
CH683482GA3 (en) 1994-03-31
JPH05264750A (en) 1993-10-12
BR9205175A (en) 1993-06-29
CN1078050A (en) 1993-11-03
CN1037377C (en) 1998-02-11
CA2084953A1 (en) 1993-06-29
EP0549978A1 (en) 1993-07-07
CH683482B5 (en) 1994-09-30
AU3049292A (en) 1993-07-01
ATE166731T1 (en) 1998-06-15
KR930013896A (en) 1993-07-22
DE69225687D1 (en) 1998-07-02
MX9207262A (en) 1993-06-01

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