EP0269872B1 - Watch case - Google Patents

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Publication number
EP0269872B1
EP0269872B1 EP87115949A EP87115949A EP0269872B1 EP 0269872 B1 EP0269872 B1 EP 0269872B1 EP 87115949 A EP87115949 A EP 87115949A EP 87115949 A EP87115949 A EP 87115949A EP 0269872 B1 EP0269872 B1 EP 0269872B1
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EP
European Patent Office
Prior art keywords
ring
watch case
gasket
wall
case according
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
Application number
EP87115949A
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German (de)
French (fr)
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EP0269872A1 (en
Inventor
Jacques Müller
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ETA Manufacture Horlogere Suisse SA
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ETA Manufacture Horlogere Suisse SA
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Publication of EP0269872A1 publication Critical patent/EP0269872A1/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
    • 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
    • G04B37/08—Hermetic sealing of openings, joints, passages or slits
    • G04B37/11—Hermetic sealing of openings, joints, passages or slits of the back cover of pocket or wrist watches

Definitions

  • the present invention relates to a watch case comprising a case-glass assembly comprising a transparent central part and a peripheral lateral part delimiting an interior cavity intended to receive a movement, a bottom obstructing this interior cavity, and assembly means making it possible to make the bottom secured to the middle part-glass.
  • the invention relates more particularly, but not exclusively, to a sealed box, the middle of which is made of a single piece of mineral glass, and the metal bottom.
  • Watch cases of this kind are well known, however, despite their simplicity, they have never been widely used since the assembly of the two parts has always posed a delicate problem, which has never been satisfactorily resolved.
  • patent application DE 3 120 799 describes a watch case, the middle-glass assembly, of pressed glass, and the back, of metal, are assembled by means of a notch device acting directly between these two parts. . It is obvious that such a device risks damaging, or even destroying, the glass part during the operations of closing and opening the box.
  • the object of the present invention is to overcome these drawbacks by proposing a watch case of the above type, which is particularly remarkable in that it further comprises a deformable seal arranged along the internal wall of the lateral part. peripheral, and in that the assembly means penetrate, at least partially, into the internal cavity to exert, in cooperation with the bottom, a radial force on the deformable joint in order to compress it against the internal wall.
  • An advantage of the watch case according to the present invention stems from the fact that the deformable seal, by equalizing the pressures exerted on the internal wall, makes it possible to avoid any risk of local deformation which could cause the middle part to rupture. ice.
  • Another advantage of the invention results from the simplicity of the assembly means which, requiring neither delicate machining nor complex parts, make it possible to reduce the cost of manufacturing the box.
  • FIGS. 1 and 2 there is a window-glass assembly 1 of round shape constituting one of the two main parts of the box.
  • Part 1 has a relatively thick edge 2 and a thinner central cap 3.
  • the middle part-glass 1 is made of pressed mineral glass. It thus forms a single homogeneous piece.
  • the edge 2 plays the same role as the middle part in a conventional watch case, while the cap 3, which is transparent, fulfills the same function as the crystal.
  • the outer surface of the edge 2 can be treated appropriately in order to give the box a particular appearance. This surface can, for example, be opaque to conceal the interior of the box.
  • the edge 2 has an internal side wall 4 which delimits in the middle part-glass 1, with the internal face of the cap 3, an internal cavity 5. This cavity is intended to receive a movement and a display, not shown.
  • the wall 4 forms a cylindrical surface arranged perpendicular to the main plane of the box.
  • a bottom 10 which constitutes the other main part of the box.
  • This bottom in the form of a thin plate made for example of stainless steel, is intended to close the interior cavity 5.
  • Two horns 11, used to attach to a bracelet (not shown), are arranged at the ends of the bottom 10. Finally, it has holes 12 with axes parallel to the wall 4, the role of which will appear further on.
  • a brass ring 15 comprising, at the end facing the cap 3, a flange 16. The outer lateral edge of this flange comes into contact with the wall 4 in order to center the ring 15 radially in the cavity 5, this ring can advantageously also serve as a casing ring for the movement.
  • the ring 15 also comprises tapped holes 17 arranged opposite the holes 12.
  • a brass ring 18 extending from the collar 16 to the end of the ring.
  • the outer face of this ring has a bevel 18 'in its portion which is located near the flange 16.
  • a deformable annular seal 19 This seal must be made of a softer material than that used for ring 15 and ring 18.
  • the seal could advantageously be made of rubber, synthetic material, or even a ductile metal such as copper.
  • the mounting of the box is obtained by placing the gasket 19 on the ring 15 so that it touches the flange 16, then sliding the ring 18 on the ring until the bevel 18 'comes into contact with the joint, finally by introducing everything into the cavity 5.
  • the ring 18 also has a height such that, in this position of the elements, its end projects beyond the body 1 and the ring 15.
  • the radial force pressing the seal 19 against the wall 4 causes an axial friction force which prevents the ring 15 from coming out of the cavity 5.
  • the height of the ring 18 is chosen so that when the bottom 10 comes into contact with the ring 15, after the locking of the screws 20, the friction force is sufficient to avoid inadvertent opening of the box under any circumstances.
  • the wall 4, at the point where it comes into contact with the seal 19, can advantageously be made rough, or else include an annular groove 21 serving as housing for the seal.
  • the deformable seal 19 may be a seal to prevent moisture from entering the cavity 5 along the wall 4.
  • a second seal sealing 25 must be disposed between the bottom 10 and the ring 15 in a groove 24 formed in the ring.
  • the screws 20 must be outside the perimeter delimited by the groove 24 which, of course, can also be made in the bottom 10.
  • the middle part-glass 1 could, for example, include a middle part, a glass, possibly a bezel, these independent parts being assembled in a conventional manner.
  • the middle part would preferably be made of a hard material such as sintered metal, corundum or ceramic, but a metal such as brass, stainless steel or gold could also be used.
  • the side wall 4, making it possible to fix the bottom 10, would be made in the middle.
  • the wall 4 would be made in the glass which would have a thick edge for this purpose, the height of the middle being then reduced so as not to increase the height of the box.

Abstract

The case is essentially made up of a hollow middle cum glass unit (1), consisting of an integral glass pressing, and of a metal back (10) closing off a cavity (5) defined by the inside surface of the hollow unit, the cavity providing a housing for a movement. In the cavity is mounted a metal ring (15) having a centering flange (16) bearing against the middle portion of the unit. In the space between the ring and the middle portion are inserted a deformable rubber gasket (19) and a metal annulus (18) whose radially outer surface is formed with a bevel (18') in the region nearest the gasket. Screws (20) secure the back (10) to the ring (15) and press it against the annulus (18). On being driven home, the screws wedge the bevel (18') between the gasket and the ring thereby to apply a radial force on the gasket . This force presses the gasket against the middle portion of the unit and prevents it from moving out of the cavity.

Description

La présente invention concerne une boîte de montre comprenant un ensemble carrure-glace comportant une partie centrale transparente et une partie latérale périphérique délimitant une cavité intérieure destinée à recevoir un mouvement, un fond obstruant cette cavité intérieure, et des moyens d'assemblage permettant de rendre le fond solidaire de l'ensemble carrure-glace.The present invention relates to a watch case comprising a case-glass assembly comprising a transparent central part and a peripheral lateral part delimiting an interior cavity intended to receive a movement, a bottom obstructing this interior cavity, and assembly means making it possible to make the bottom secured to the middle part-glass.

L'invention concerne plus particulièrement, mais non exclusivement, une boîte étanche dont l'ensemble carrure-glace est réalisé d'une seule pièce en verre minéral, et le fond en métal.The invention relates more particularly, but not exclusively, to a sealed box, the middle of which is made of a single piece of mineral glass, and the metal bottom.

Des boîtes de montre de ce genre sont bien connues, cependant, malgré leur simplicité, elles n'ont jamais été largement utilisées car l'assemblage des deux parties a toujours posé un problème délicat, qui n'a jamais été résolu de manière satisfaisante.Watch cases of this kind are well known, however, despite their simplicity, they have never been widely used since the assembly of the two parts has always posed a delicate problem, which has never been satisfactorily resolved.

Par exemple la demande de brevet DE 3 120 799 décrit une boîte de montre dont l'ensemble carrure-glace, en verre pressé, et le fond, en métal, sont assemblés au moyen d'un dispositif à cran agissant directement entre ces deux pièces. Il est évident qu'un tel dispositif risque d'endommager, ou même de détruire, la partie en verre lors des opérations de fermeture et d'ouverture de la boîte.For example, patent application DE 3 120 799 describes a watch case, the middle-glass assembly, of pressed glass, and the back, of metal, are assembled by means of a notch device acting directly between these two parts. . It is obvious that such a device risks damaging, or even destroying, the glass part during the operations of closing and opening the box.

Un dispositif d'assemblage ne risquant pas de provoquer de tels dommages est utilisé dans la boîte de montre décrite dans le brevet CH 554 014. L'ensemble carrure-glace de cette boîte est en corindon fritté, matière dure et cassante, et le fond en acier. Les deux pièces sont assemblées, dans ce cas, à l'aide de vis traversant des ouvertures pratiquées dans le fond et venant se visser dans des bouchons métalliques fixés dans des trous de l'ensemble carrure-glace. Si ce moyen d'assemblage permet d'éviter des pressions locales élevées, il est par contre coûteux à réaliser car il nécessite le perçage de trous dans un matériau difficile à usiner et la fixation des bouchons.An assembly device which does not risk causing such damage is used in the watch case described in patent CH 554 014. The case-glass assembly of this box is made of sintered corundum, hard and brittle material, and the bottom in steel. The two parts are assembled, in this case, using screws passing through openings made in the bottom and coming to be screwed in metal plugs fixed in holes of the middle part-glass. If this assembly means makes it possible to avoid high local pressures, it is on the other hand expensive to produce because it requires the drilling of holes in a material difficult to machine and the fixing of the plugs.

La présente invention a pour but de pallier ces inconvénients en proposant une boîte de montre du type ci-dessus, qui est particulièrement remarquable en ce qu'elle comprend, en outre, un joint déformable disposé le long de la paroi interne de la partie latérale périphérique, et en ce que les moyens d'assemblage pénètrent, au moins partiellement, dans la cavité intérieure pour exercer, en coopération avec le fond, une force radiale sur le joint déformable afin de le comprimer contre la paroi interne.The object of the present invention is to overcome these drawbacks by proposing a watch case of the above type, which is particularly remarkable in that it further comprises a deformable seal arranged along the internal wall of the lateral part. peripheral, and in that the assembly means penetrate, at least partially, into the internal cavity to exert, in cooperation with the bottom, a radial force on the deformable joint in order to compress it against the internal wall.

Un avantage de la boîte de montre selon la présente invention provient du fait que le joint déformable, en égalisant les pressions s'exerçant sur la paroi interne, permet d'éviter tout risque de déformation locale pouvant entraîner la rupture de l'ensemble carrure-glace.An advantage of the watch case according to the present invention stems from the fact that the deformable seal, by equalizing the pressures exerted on the internal wall, makes it possible to avoid any risk of local deformation which could cause the middle part to rupture. ice.

Un autre avantage de l'invention résulte de la simplicité des moyens d'assemblage qui, ne nécessitant ni usinages délicats ni pièces complexes, permettent de diminuer le coût de fabrication de la boîte.Another advantage of the invention results from the simplicity of the assembly means which, requiring neither delicate machining nor complex parts, make it possible to reduce the cost of manufacturing the box.

D'autres propriétés et avantages réalisables avec la boîte de montre selon la présente invention ressortiront de la description qui va suivre, faite en regard du dessin annexé et donnant, à titre explicatif mais nullement limitatif, un exemple de réalisation d'une telle boîte. Sur ce dessin, où les mêmes références se rapportent à des éléments analogues:

  • - la figure 1 est une vue partielle de profil et en coupe d'une forme de réalisation des principales pièces constitutives d'une boîte de montre selon l'invention; et
  • - la figure 2 est une vue partielle de profil et en coupe de la boîte, représentée sur la figure précédente, une fois assemblée.
Other properties and advantages achievable with the watch case according to the present invention will emerge from the description which follows, made with reference to the appended drawing and giving, by way of explanation but in no way limiting, an example of embodiment of such a case. In this drawing, where the same references relate to similar elements:
  • - Figure 1 is a partial side view in section of an embodiment of the main component parts of a watch case according to the invention; and
  • - Figure 2 is a partial side view in section of the box, shown in the previous figure, once assembled.

Sur les figures 1 et 2 on distingue un ensemble carrure-glace 1 de forme ronde constituant l'une des deux parties principales de la boîte. La partie 1 comporte un bord 2 relativement épais, et une calotte centrale 3, plus mince. Dans le mode de réalisation préféré l'ensemble carrure-glace 1 est en verre minéral pressé. Il forme ainsi une seule et môme pièce homogène. Le bord 2 joue le même rôle que la carrure dans une boîte de montre conventionnelle, alors que la calotte 3, qui est transparente, remplit la même fonction que la glace. La surface extérieure du bord 2 peut être traitée de manière appropriée afin de donner à la boîte un aspect particulier. Cette surface peut, par exemple, être opaque pour dissimuler l'intérieur de la boîte.In FIGS. 1 and 2 there is a window-glass assembly 1 of round shape constituting one of the two main parts of the box. Part 1 has a relatively thick edge 2 and a thinner central cap 3. In the preferred embodiment, the middle part-glass 1 is made of pressed mineral glass. It thus forms a single homogeneous piece. The edge 2 plays the same role as the middle part in a conventional watch case, while the cap 3, which is transparent, fulfills the same function as the crystal. The outer surface of the edge 2 can be treated appropriately in order to give the box a particular appearance. This surface can, for example, be opaque to conceal the interior of the box.

Le bord 2 présente une paroi latérale interne 4 qui délimite dans l'ensemble carrure-glace 1, avec la face interne de la calotte 3, une cavité intérieure 5. Cette cavité est destinée à recevoir un mouvement et un affichage, non représentés. La paroi 4 forme une surface cylindrique disposée perpendiculairement au plan principal de la boîte.The edge 2 has an internal side wall 4 which delimits in the middle part-glass 1, with the internal face of the cap 3, an internal cavity 5. This cavity is intended to receive a movement and a display, not shown. The wall 4 forms a cylindrical surface arranged perpendicular to the main plane of the box.

Sur l'ensemble carrure-glace 1, du côté opposé à la calotte 3, est disposé un fond 10, lequel constitue l'autre partie principale de la boîte. Ce fond, en forme de plaque mince réalisée par exemple en acier inoxydable, est destiné à fermer la cavité intérieure 5. Deux cornes 11, servant d'attache à un bracelet (non représenté), sont disposées aux extrémités du fond 10. Enfin, celui-ci comporte des trous 12 d'axes parallèles î la paroi 4, dont le rôle appara'tra plus loin.On the middle part-glass 1, on the side opposite to the cap 3, is disposed a bottom 10, which constitutes the other main part of the box. This bottom, in the form of a thin plate made for example of stainless steel, is intended to close the interior cavity 5. Two horns 11, used to attach to a bracelet (not shown), are arranged at the ends of the bottom 10. Finally, it has holes 12 with axes parallel to the wall 4, the role of which will appear further on.

A l'intérieur de l'ensemble carrure-glace 1 se trouve une bague en laiton 15 comportant, à l'extrémité faisant face à la calotte 3, une collerette 16. Le bord latéral extérieur de cette collerette vient en contact avec la paroi 4 afin de centrer radialement la bague 15 dans la cavité 5, cette bague pouvant avantageusement servir également de bague d'en- cageage pour le mouvement. La bague 15 comporte, en outre, des trous taraudés 17 disposés en regard des trous 12.Inside the window-glass assembly 1 is a brass ring 15 comprising, at the end facing the cap 3, a flange 16. The outer lateral edge of this flange comes into contact with the wall 4 in order to center the ring 15 radially in the cavity 5, this ring can advantageously also serve as a casing ring for the movement. The ring 15 also comprises tapped holes 17 arranged opposite the holes 12.

Autour de la bague 15, dans l'espace libre qui la sépare de la paroi 4, est disposé un anneau en laiton 18 s'étendant de la collerette 16 jusqu'à l'extrémité de la bague. La face extérieure de cet anneau comporte un biseau 18' dans sa portion qui se trouve près de la collerette 16.Around the ring 15, in the free space which separates it from the wall 4, is arranged a brass ring 18 extending from the collar 16 to the end of the ring. The outer face of this ring has a bevel 18 'in its portion which is located near the flange 16.

Enfin dans l'espace délimité par la paroi 4, la bague 15, la collerette 16 et le biseau 18' de l'anneau 18, est disposé un joint annulaire déformable 19. Ce joint doit être réalisé en un matériau plus tendre que celui utilisé pour la bague 15 et l'anneau 18. Par exemple si la bague et l'anneau sont en acier ou en laiton, le joint pourrait avantageusement être en caoutchouc, en matière synthétique, voire en un métal ductile tel que le cuivre.Finally in the space delimited by the wall 4, the ring 15, the flange 16 and the bevel 18 'of the ring 18, is arranged a deformable annular seal 19. This seal must be made of a softer material than that used for ring 15 and ring 18. By example if the ring and the ring are made of steel or brass, the seal could advantageously be made of rubber, synthetic material, or even a ductile metal such as copper.

Les pièces référencées 15, 18 et 19 qui viennent d'être décrites peuvent coulisser librement dans le sens axial le long de la paroi 4. Il est donc possible de les introduire sans difficulté dans la cavité 5, ainsi que de les en extraire.The parts referenced 15, 18 and 19 which have just been described can slide freely in the axial direction along the wall 4. It is therefore possible to introduce them without difficulty into the cavity 5, as well as to extract them therefrom.

La description qui vient d'être faite concerne une boîte de montre ronde. L'enseignement que l'on peut tirer de cette réalisation peut, bien entendu, être utilisé pour réaliser aussi une boîte de forme, par exemple rectangulaire ou ovale.The description which has just been made relates to a round watch case. The lessons that can be drawn from this realization can, of course, be used to also make a box of shape, for example rectangular or oval.

Le montage de la boîte est obtenu en plaçant le joint 19 sur la bague 15 de manière qu'il touche la collerette 16, puis en glissant sur la bague l'anneau 18 jusqu'à ce que le biseau 18' vienne en contact avec le joint, enfin en introduisant le tout dans la cavité 5. L'anneau 18 a par ailleurs une hauteur telle que, dans cette position des éléments, son extrémité dépasse du corps 1 et de la bague 15.The mounting of the box is obtained by placing the gasket 19 on the ring 15 so that it touches the flange 16, then sliding the ring 18 on the ring until the bevel 18 'comes into contact with the joint, finally by introducing everything into the cavity 5. The ring 18 also has a height such that, in this position of the elements, its end projects beyond the body 1 and the ring 15.

Il reste à appliquer le fond 10 sur l'anneau 18 dans une position où les trous 12 viennent en regard des trous 17, permettant d'introduire dans chaque trou 17 une vis 20 à travers le trou 12 correspondant. En vissant les vis 20, le fond 10 se rapproche de la bague 15 en exerçant une force axiale sur l'anneau 18. Cette force, dirigée perpendiculairement au fond 10, fait pénétrer le biseau 18' de l'anneau 18 entre la bague 15 et le joint 19 en déformant ce dernier puisqu'il se trouve en appui contre la collerette 16. Une pénétration suffisante de l'anneau amène le joint 19 en contact avec la paroi 4, contre laquelle il se trouve comprimé par une force radiale. Etant donné que la bague est déformable, la pression qu'elle exerce sur la paroi est répartie uniformêment, évitant des déformations locales pouvant entraîner la rupture de l'ensemble carrure-glace 1 s'il est réalisé en un matériau dur et cassant.It remains to apply the bottom 10 on the ring 18 in a position where the holes 12 come opposite the holes 17, allowing to introduce into each hole 17 a screw 20 through the corresponding hole 12. By screwing the screws 20, the bottom 10 approaches the ring 15 by exerting an axial force on the ring 18. This force, directed perpendicular to the bottom 10, causes the bevel 18 'of the ring 18 to penetrate between the ring 15 and the seal 19 by deforming the latter since it is in abutment against the flange 16. Sufficient penetration of the ring brings the seal 19 into contact with the wall 4, against which it is compressed by a radial force. Since the ring is deformable, the pressure which it exerts on the wall is distributed uniformly, avoiding local deformations which can lead to the rupture of the middle part-glass 1 if it is made of a hard and brittle material.

La force radiale appuyant le joint 19 contre la paroi 4 entraîne une force axiale de frottement qui empêche la bague 15 de sortir de la cavité 5. La hauteur de l'anneau 18 est choisie de manière que lorsque le fond 10 vient en contact avec la bague 15, après le blocage des vis 20, la force de frottement soit suffisante pour éviter l'ouverture intempestive de la boîte en toute circonstance. Pour améliorer encore la fixation du fond 10 sur le corps 1, la paroi 4, à l'endroit où elle entre en contact avec le joint 19, peut avantageusement être rendue rugueuse, ou bien comporter une gorge annulaire 21 servant de logement au joint.The radial force pressing the seal 19 against the wall 4 causes an axial friction force which prevents the ring 15 from coming out of the cavity 5. The height of the ring 18 is chosen so that when the bottom 10 comes into contact with the ring 15, after the locking of the screws 20, the friction force is sufficient to avoid inadvertent opening of the box under any circumstances. To further improve the fixing of the bottom 10 on the body 1, the wall 4, at the point where it comes into contact with the seal 19, can advantageously be made rough, or else include an annular groove 21 serving as housing for the seal.

Le joint déformable 19 peut être un joint étanche afin d'empêcher l'humidité d'entrer dans la cavité 5 le long de la paroi 4. Cependant, pour rendre la boîte tout à fait imperméable à l'eau, un second joint d'étanchéité 25 doit être disposé entre le fond 10 et la bague 15 dans une gorge 24 pratiquée dans la bague. Les vis 20 doivent se trouver à l'extérieur du périmètre délimité par la gorge 24 qui, bien entendu, peut aussi être pratiquée dans le fond 10.The deformable seal 19 may be a seal to prevent moisture from entering the cavity 5 along the wall 4. However, to make the box completely waterproof, a second seal sealing 25 must be disposed between the bottom 10 and the ring 15 in a groove 24 formed in the ring. The screws 20 must be outside the perimeter delimited by the groove 24 which, of course, can also be made in the bottom 10.

Il va de soi que la boîte de montre qui vient d'être décrite peut subir différentes modifications et se présenter sous d'autres variantes évidentes pour l'homme de l'art, sans sortir du cadre de la présente invention.It goes without saying that the watch case which has just been described can undergo various modifications and appear in other variants obvious to those skilled in the art, without departing from the scope of the present invention.

L'ensemble carrure-glace 1 pourrait, par exemple, comprendre une carrure, une glace, éventuellement une lunette, ces pièces indépendantes étant assemblées de manière conventionnelle. La carrure serait préférentiellement réalisée en un matériau dur tel que le métal fritté, le corindon ou la céramique, mais un métal tel que le laiton, l'acier inoxydable ou l'or pourrait aussi être utilisé. La paroi latérale 4, permettant de fixer le fond 10, serait pratiquée dans la carrure. Dans une autre variante, la paroi 4 serait pratiquée dans la glace qui comporterait à cet effet un bord épais, la hauteur de la carrure étant alors réduite pour ne pas accroître la hauteur de la boîte.The middle part-glass 1 could, for example, include a middle part, a glass, possibly a bezel, these independent parts being assembled in a conventional manner. The middle part would preferably be made of a hard material such as sintered metal, corundum or ceramic, but a metal such as brass, stainless steel or gold could also be used. The side wall 4, making it possible to fix the bottom 10, would be made in the middle. In another variant, the wall 4 would be made in the glass which would have a thick edge for this purpose, the height of the middle being then reduced so as not to increase the height of the box.

Claims (8)

1. Watch case comprising a middle cum glass unit (1) having a central transparent portion (3) and a peripheral side portion (2) together defining an inner cavity (5) for accommodating a movement, a back (10) that closes of said inner cavity (5), and assembly means (15, 16, 18, 20) for securing the back (10) to said middle cum glass unit (1), characterized in that it further comprises a deformable gasket (19) disposed along the inner wall (4) of said peripheral side portion (2) and in that said assembly means (15, 16, 18, 20) projects, at least in part, into the inner cavity (5) to exert, in cooperation with the back (10), a radial force on the deformable gasket (19) thereby to compress the latter against said inner wall (4).
2. Watch case according to claim 1, characterized in that said assembly means includes :
- a ring (15) disposed in the inner cavity (5) and leaving a free space between itself and said inner wall (4), said ring (15) having a centering flange (16) bearing on said inner wall (4) and forming a bearing for the deformable gasket (19),
- an annulus (18) disposed in said free space and having a radially outer surface formed with a bevel (18') over a portion thereof nearest the deformable gasket (19), and
- means (20) for securing the back (10) to the ring (15) whereby said back (10) may exert on the annulus (18) an axial force such that its bevel portion, in cooperation with the centering flange (16), may exert said radial force on the deformable gasket (19) and compress the latter against said inner wall (4).
3. Watch case according to claim 2, characterized in that said ring (15) provides a fitting ring for said movement.
4. Watch case according to any one of the preceding claims, characterized in that said deformable gasket (19) is a sealing gasket.
5. Watch case according to any one of the preceding claims, characterized in that it comprises a sealing gasket (25) disposed between the back (10) and the ring (15).
6. Watch case according to any one of the preceding claims, characterized in that the middle cum glass unit (1) is a single part made of pressed mineral glass.
7. Watch case according to any one of the preceding claims, characterized in that said inner wall (4) has a groove (21) for receiving said deformable gasket (19).
8. Watch case according to any one of claims 2 to 7, characterized in that the securing means (20) in- dudes at least one screw.
EP87115949A 1986-11-04 1987-10-30 Watch case Expired - Lifetime EP0269872B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH436486A CH665745GA3 (en) 1986-11-04 1986-11-04
CH4364/86 1986-11-04

Publications (2)

Publication Number Publication Date
EP0269872A1 EP0269872A1 (en) 1988-06-08
EP0269872B1 true EP0269872B1 (en) 1990-02-21

Family

ID=4274721

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87115949A Expired - Lifetime EP0269872B1 (en) 1986-11-04 1987-10-30 Watch case

Country Status (7)

Country Link
US (1) US4831607A (en)
EP (1) EP0269872B1 (en)
JP (1) JPS63124989A (en)
CH (1) CH665745GA3 (en)
DE (1) DE3761734D1 (en)
HK (1) HK32193A (en)
SG (1) SG132192G (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH684236B5 (en) * 1991-11-04 1995-02-15 Longines Montres Comp D watch case with a removable bottom.
EP0762240A1 (en) * 1995-08-30 1997-03-12 Fabrique D'ebauches De Sonceboz S.A. Watch case with a recessed case and fitting means and watch provided with such a case
TW505831B (en) * 2001-03-15 2002-10-11 Ebauchesfabrik Eta Ag Watch case assembled via the bezel
KR20040094887A (en) * 2002-03-26 2004-11-10 시티즌 도케이 가부시키가이샤 Radio controlled watch
EP2595007B1 (en) * 2011-11-17 2015-01-07 ETA SA Manufacture Horlogère Suisse Timepiece assembly with centring and attachment of a plate relative to a middle case.

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2968911A (en) * 1955-11-01 1961-01-24 Piquerez Ervin Fluidtight watch case
CH554014A (en) * 1970-06-25 1974-09-13
CH1549371A4 (en) * 1971-10-25 1973-02-28 Finger H Fa Watch shell
JPS5192653A (en) * 1975-02-12 1976-08-13
CH632886GA3 (en) * 1979-02-21 1982-11-15 Piece of jewellery protected by a shielding of hard metal
CH653205GA3 (en) * 1982-07-09 1985-12-31
GB2128378B (en) * 1982-08-24 1986-01-02 Citizen Watch Co Ltd Water-resisting structure for a watch
CH654168GA3 (en) * 1983-08-22 1986-02-14
JPS60263882A (en) * 1984-06-07 1985-12-27 ゲブリユ−デル、ユングハンス、ゲゼルシヤフト、ミツト　ベシユレンクテル、ハフツング Wristwatch

Also Published As

Publication number Publication date
HK32193A (en) 1993-04-08
DE3761734D1 (en) 1990-03-29
EP0269872A1 (en) 1988-06-08
SG132192G (en) 1993-03-12
JPS63124989A (en) 1988-05-28
US4831607A (en) 1989-05-16
CH665745GA3 (en) 1988-06-15

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