EP1102136A1 - Device for assembling a cap made of hard material to the middle part of a watch - Google Patents

Device for assembling a cap made of hard material to the middle part of a watch Download PDF

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Publication number
EP1102136A1
EP1102136A1 EP99122881A EP99122881A EP1102136A1 EP 1102136 A1 EP1102136 A1 EP 1102136A1 EP 99122881 A EP99122881 A EP 99122881A EP 99122881 A EP99122881 A EP 99122881A EP 1102136 A1 EP1102136 A1 EP 1102136A1
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EP
European Patent Office
Prior art keywords
cap
center
screws
wall
cover
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.)
Granted
Application number
EP99122881A
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German (de)
French (fr)
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EP1102136B1 (en
Inventor
Denis Lüscher
Michael Bach
Fernand Vuillaume
Eloi Vuillaume
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Rado Uhren AG
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Rado Uhren AG
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Publication date
Application filed by Rado Uhren AG filed Critical Rado Uhren AG
Priority to DE69940381T priority Critical patent/DE69940381D1/en
Priority to EP99122881A priority patent/EP1102136B1/en
Publication of EP1102136A1 publication Critical patent/EP1102136A1/en
Application granted granted Critical
Publication of EP1102136B1 publication Critical patent/EP1102136B1/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
    • G04B47/00—Time-pieces combined with other articles which do not interfere with the running or the time-keeping of the time-piece
    • G04B47/04—Time-pieces combined with other articles which do not interfere with the running or the time-keeping of the time-piece with attached ornaments or amusement apparatus
    • G04B47/046—Changeable decorations and parts thereof, decorations for the case which change the external appearance of the clockwork
    • 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
    • G04B37/0008—Cases for pocket watches and wrist watches
    • 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
    • G04B37/084—Complete encasings for wrist or pocket watches without means for hermetic sealing of winding stem or crown
    • 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
    • G04B37/22—Materials or processes of manufacturing pocket watch or wrist watch cases

Definitions

  • the subject of the present invention is a device for assembling a hard material cap on the upper edge of the middle of a box watch.
  • the visible parts that is to say the glass, the middle part and the cap are the parts most exposed to external aggressions, such as scratches, shocks, oxidation, etc.
  • the manufacturing is certainly delicate, but whose simple geometric shape does not involve complicated machining.
  • a very hard material such as ceramic.
  • Such a material has remarkable resistance to attack but has the disadvantages of still being sensitive to shocks and very badly lend themselves to too complex machining. For this reason, this hard material is most often used as a covering for an underlying structure more easily machinable and generally much cheaper.
  • document CH 508 925 proposes to removably fix the cap to an element of the housing by providing two grooves opposite between which are interposed with a closed elastic ring which will be compressed during mounting. If the section of this ring is too large, there is a risk of breaking the cap by forcing it to assembly; if on the contrary the section is too small the cap may turn around the middle which can be annoying for the passage of the time-setting rod, or unsightly if the cap is not perfectly circular.
  • the document CH 568 040 proposes to make blind holes radially in the underside plane of the cap, filling these holes with material easily to be threaded and to screw said cap onto an element of the middle part.
  • the solution proposed allows to consider, if necessary, a replacement of said cap and provides better relative positioning of the two assembled elements, but such a construction is relatively complex and the blind holes undoubtedly weaken said cap.
  • the object of the present invention is therefore to remedy the drawbacks of this prior art by providing a device for assembling a cap in hard material on the upper edge of the middle of a watch case or on an integral part thereof, said cap being obtainable with a reduced number of machining operations and can be easily replaced in case of breakage.
  • the invention relates to a removable assembly device of a hard material cap on the upper edge of the middle of a box watch closed by a crystal and a bottom delimiting with a circle casing, a space to house at least one movement, characterized in that that it includes a metal center whose external wall has a structure in stairs complementary to the internal structure of the cap made integral said center by means of at least two screws passing through it through holes for clamping flanges housed in formed radial recesses in a vertical wall of the cap, compressing an elastomeric seal arranged between two horizontal surfaces of stepped structures, and of which the thickness is sufficient to provide clearances at least between surfaces facing respectively the bottom and the base of the cap, and the wall vertical from the center and the wall of the cap joining the base.
  • the housing 1 of a wristwatch the visible parts of which essentially consist of a cap 20 forming a middle part 4, in which a recess 5 is formed for housing the time setting crown 7.
  • the recess 5 comprises in its center a gutter 26, visible in Figure 4, which joins the surface inside of the cap 20 to allow the passage of the stem of the crown setting the time 7.
  • the central part of the cap 20 comprises, above a dial 11 provided with hour / minute / second hands 13a, 13b, 13c, a sapphire crystal 3, the fixing of which will be explained later.
  • the cap 20 leaves visible, at the 12h-6h positions, below the middle 4, an extension 8 of the bottom 2, curved outward substantially along the curvature of a wrist and provided with horns 10 used for fixing a bracelet (not shown). It is obvious that after attaching a bracelet this extension 8 will no longer be visible at all.
  • the bottom 2 and the dial 11 define, with the casing circle 6, a housing 9 for a watch movement 29 held by two fixing screws 18 (also visible in Figure 3).
  • the cap 20 has an oblong shape and covers, from the perimeter of the glass 3, the entire surface of the watch by forming two ears 28 extending above the extensions 8, being, like said extensions 8 curved outwards to form a dome.
  • Figure 4 is an exploded perspective view of. device assembly, the different parts having the orientation seen from below shown in Figure 3.
  • the device includes a center metal 30, an elastomer washer 12, two screws 14, 16 and two flanges 15, 17 which will allow the assembly of the cap 20.
  • the wall inside of the cap has an annular staircase structure, from base 21, by orthogonal flat surfaces 21a, 22, 22a, 23a.
  • the base 21 is extended at the level of the ears 28 by oblique extensions 24 having the same inclination as the extensions 8 of the bottom 2.
  • the vertical part 21a, joining the base 21 and parallel to the middle part 4 has at the ears 28 two recesses 25, 27 diametrically opposite and intended to receive the flanges 15, 17. If except the operations of polishing the external surfaces, these recesses are the only parts of the cap 20 which require machining particular. They can, for example, be obtained by grinding diamond, or by planning, during the manufacture of the drawer cover in the mold at the locations of the recesses 25, 27.
  • the metal center 30 is formed of a ring whose surface exterior has a staircase shape, complementary to that of the cover 20, formed from the base 31 by flat surfaces 31a, 32, 32a, 33.
  • the inner wall 46 of metal center 30 comprises at its base and at its part upper two annular grooves 45, 47 for receiving seals seal 45a, 47a compressed respectively axially against the bottom 2 and radially against the vertical edge 3a of the glass 3.
  • the bottom of the groove annular 47 is extended towards the inside of the case 1 by a ring 40 which goes form a ring between the spout 3b of the glass 3 and the dial 11. It is quite obvious that this ring 40 is only optional and that it could be replaced by an independent flange.
  • the surface 33 of the metal center 30 comprises two open clearances 35, 37 diametrically opposite and intended to receive the flanges 15, 17.
  • the clearances 35.37 include in their substantially middle part the axial holes 34, 36 in which the screws 14, 16 of fixing the flanges 15, 17.
  • These clearances 35, 37 make it possible to reduce the height of the assembly device and facilitate the positioning of the center 30 above the flanges. According to a simpler embodiment, it is also possible to provide no clearance.
  • the metal center 30 finally comprises, distributed around its periphery, four tapped holes 39 for the fixing of the bottom 2 by means of four screws 19, as well as a radial bore 38 for the passage of the crown stem 7.
  • a first step starting from the central element formed by the metal center 30, it is possible to pre-assemble in a known manner all of the constituent parts of the watch, crystal 3, hands 13a, 13b, 13c, dial 11, casing ring 6, movement 29 and crown 7, except for the cap 20 and bottom 2.
  • the metal center 30 and the casing ring 6 can be made in one piece.
  • the dimensions of the assembled elements and the thickness of the elastomer washer 12 are provided so that there are very small clearance between the internal surfaces of the cap 20 and the surfaces of the facing elements, with the exception of the surfaces 22, 32 between which is compressed the elastomer washer 12.
  • the clearance between the oblique extension 24 and the extension 8 of the bottom 2 is designated by the reference 44, that between the base 21 and the bottom 2 by the reference 41, that between the wall 21a and the wall corresponding 31a from the center 30 by the reference 41a, that between the wall 23 and the outer edge 33 of the center 20 by the reference 43, and that between the wall 23a and the edge 3a of the glass 3 by the reference 43a.
  • the means for fixing the cap are at number of two and are positioned under the bottom 2 at the 12h-6h positions, at level of the cap where there is the most material.
  • the point of the most hollow 25, 27 close to the surface of the cap 20 remains the same around the entire periphery of said cap, so that one can, according to an alternative embodiment, consider put more than two fixing means occupying angular positions different from the axis 12h-6h.
  • the two axial holes 34, 36 and the four tapped holes 39 have an angular offset, i.e. they are distinct and that only the screws 19 for fixing the bottom 2 are visible.
  • the center 30 only comprises two tapped holes 39 for two screws 19 for fixing the bottom, the other two screws being combined with the flange fixing screws 14, 16 15, 17 having longer stems.
  • this embodiment has the advantage of being able to replace the cap 20 without depositing the bottom 2, and therefore without risk damage the seal 45a.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Electric Clocks (AREA)

Abstract

The metal ring includes a stepped structure retaining the elastomer seal material between the major casing components. The watch casing is closed by a cover glass (3) and a base (2) which fit with a casing ring (6) to define a space (9) to house the movement (29). A metallic centre component (30) includes an external wall with a stepped external structure which is complementary to the internal structure of the cover (20). The cover is solidly attached to the centre (30) by means of two screws (14, 16), retain tabs (15,17) lodged in radial hollows formed within a vertical wall of the cover. An elastomer joint (12) is disposed between two horizontal surfaces which form part of the stepped structure. The thickness of the elastomer joint is sufficient to ensure a degree of play between the facing surfaces of the base and the lower surface of the cover, and between the vertical wall of the metallic centre and the wall of the cover which joins the base.

Description

La présente invention a pour objet un dispositif d'assemblage d'une coiffe en matériau dur sur le bord supérieur de la carrure d'une boíte de montre.The subject of the present invention is a device for assembling a hard material cap on the upper edge of the middle of a box watch.

Dans une boíte de montre-bracelet les parties apparentes, c'est-à-dire la glace, la carrure et la coiffe sont les parties les plus exposées aux agressions extérieures, telles que les rayures, les chocs, l'oxydation, etc. Dans les produits de qualité, on élimine ou réduit les conséquences inesthétiques de ces agressions au niveau de la glace en utilisant un verre saphir dont la fabrication est certes délicate, mais dont la forme géométrique simple n'implique pas un usinage compliqué. Pour les autres parties extérieures, on a proposé depuis longtemps d'utiliser un matériau très dur, tel qu'une céramique. Un tel matériau a une résistance remarquable aux agressions extérieures, mais a comme inconvénients d'être encore sensible aux chocs et de très mal se prêter à des usinages trop complexes. Pour cette raison, ce matériau dur est le plus souvent utilisé comme habillage d'une structure sous-jacente plus facilement usinable et généralement bien meilleur marché.In a wristwatch box the visible parts, that is to say the glass, the middle part and the cap are the parts most exposed to external aggressions, such as scratches, shocks, oxidation, etc. In quality products, we eliminate or reduce the unsightly consequences of these attacks on the ice using a sapphire crystal, the manufacturing is certainly delicate, but whose simple geometric shape does not involve complicated machining. For the other exterior parts, we have long proposed to use a very hard material, such as ceramic. Such a material has remarkable resistance to attack but has the disadvantages of still being sensitive to shocks and very badly lend themselves to too complex machining. For this reason, this hard material is most often used as a covering for an underlying structure more easily machinable and generally much cheaper.

Pour rendre solidaire la structure et l'habillage, la solution la plus évidente est le collage, comme décrit par exemple dans le brevet CH 517 963 publié le 29.02.1972. Ce document prévoit, pour une coiffe massive faiblement usinée, ou pour un revêtement mince, d'interposer un joint de colle entre les surfaces en regard. Pour avoir une cohésion optimale, il est nécessaire que les surfaces soient suffisamment grandes et présentent une excellente planéité, de l'ordre de 3/100 ce qui nécessite des opérations de rectifiage minutieuses. Il est bien évident qu'un tel assemblage par collage ne permet plus de remplacer la pièce en matériau dur dans le cas où un choc en aurait enlevé un éclat. On retrouve ce même inconvénient dans une variante du procédé proposé dans le document CH 506 826 consistant à ménager un espace entre la coiffe et un élément de boíte, puis à le remplir avec un produit formant ciment.To join the structure and the covering together, the most obvious is the bonding, as described for example in the patent CH 517 963 published on 29.02.1972. This document provides, for a headdress solid, lightly machined, or for a thin coating, to interpose a joint glue between the facing surfaces. To have optimal cohesion, it is the surfaces must be large enough and have a excellent flatness, of the order of 3/100 which requires operations of careful grinding. It is obvious that such an assembly by gluing does not allows more to replace the hard material part in case a shock in would have removed a chip. We find this same drawback in a variant of the process proposed in document CH 506 826 consisting in providing a space between the cap and a box element, then fill it with a product forming cement.

Pour permettre le démontage et le remplacement d'une telle coiffe en matériau dur, le document CH 508 925 propose de fixer de façon amovible la coiffe à un élément du boítier en prévoyant deux rainures en regard entre lesquelles on interpose un anneau fermé élastique qui sera comprimé lors du montage. Si la section de cet anneau est trop forte, on risque de briser la coiffe en la forçant au montage; si au contraire la section est trop faible la coiffe risque de tourner autour de la carrure ce qui peut être gênant pour le passage de la tige de mise à l'heure, ou inesthétique si la coiffe n'est pas parfaitement circulaire.To allow disassembly and replacement of such a cover in hard material, document CH 508 925 proposes to removably fix the cap to an element of the housing by providing two grooves opposite between which are interposed with a closed elastic ring which will be compressed during mounting. If the section of this ring is too large, there is a risk of breaking the cap by forcing it to assembly; if on the contrary the section is too small the cap may turn around the middle which can be annoying for the passage of the time-setting rod, or unsightly if the cap is not perfectly circular.

Pour remédier à l'inconvénient ci-dessus, le document CH 568 040 propose de ménager radialement des trous borgnes dans la face inférieure plane de la coiffe, de remplir ces trous avec un matériau facilement taraudable et de visser ladite coiffe sur un élément de la carrure. La solution proposée permet d'envisager, si nécessaire, un remplacement de ladite coiffe et procure un meilleur positionnement relatif des deux éléments assemblés, mais une telle construction est relativement complexes et les trous borgnes fragilisent incontestablement ladite coiffe.To remedy the above drawback, the document CH 568 040 proposes to make blind holes radially in the underside plane of the cap, filling these holes with material easily to be threaded and to screw said cap onto an element of the middle part. The solution proposed allows to consider, if necessary, a replacement of said cap and provides better relative positioning of the two assembled elements, but such a construction is relatively complex and the blind holes undoubtedly weaken said cap.

D'autres constructions se rattachent plus ou moins à celles évoquées ci-dessus, et en présentent les mêmes inconvénients.Other constructions are more or less related to those mentioned above, and have the same disadvantages.

La présente invention a donc pour objet de remédier aux inconvénients de cet art antérieur en procurant un dispositif d'assemblage d'une coiffe en matériau dur sur le bord supérieur de la carrure d'une boíte de montre ou sur une pièce solidaire de celle-ci, ladite coiffe pouvant être obtenue avec un nombre réduit d'opérations d'usinage et pouvant être facilement remplacée en cas de bris.The object of the present invention is therefore to remedy the drawbacks of this prior art by providing a device for assembling a cap in hard material on the upper edge of the middle of a watch case or on an integral part thereof, said cap being obtainable with a reduced number of machining operations and can be easily replaced in case of breakage.

A cet effet l'invention a pour objet un dispositif d'assemblage amovible d'une coiffe en matériau dur sur le bord supérieur de la carrure d'une boíte de montre fermée par une glace et un fond délimitant avec un cercle d'emboítage, un espace pour loger au moins un mouvement, caractérisé en ce qu'il comprend un centre métallique dont la paroi externe a une structure en escaliers complémentaire de la structure interne de la coiffe rendue solidaire dudit centre au moyen d'au moins deux vis le traversant à travers des perçages pour serrer des brides logées dans des creusures radiales formées dans une paroi verticale de la coiffe, en comprimant un joint élastomère disposé entre deux surfaces horizontales des structures en escalier, et dont l'épaisseur est suffisante pour ménager des jeux au moins entre des surfaces en regard respectivement du fond et de la base de la coiffe, et de la paroi verticale du centre et la paroi de la coiffe rejoignant la base.To this end the invention relates to a removable assembly device of a hard material cap on the upper edge of the middle of a box watch closed by a crystal and a bottom delimiting with a circle casing, a space to house at least one movement, characterized in that that it includes a metal center whose external wall has a structure in stairs complementary to the internal structure of the cap made integral said center by means of at least two screws passing through it through holes for clamping flanges housed in formed radial recesses in a vertical wall of the cap, compressing an elastomeric seal arranged between two horizontal surfaces of stepped structures, and of which the thickness is sufficient to provide clearances at least between surfaces facing respectively the bottom and the base of the cap, and the wall vertical from the center and the wall of the cap joining the base.

L'invention sera mieux comprise en prenant comme exemple illustratif et non limitatif un dispositif d'assemblage d'une coiffe en céramique sur une montre bracelet de forme oblongue, en référence aux dessins annexés dans lesquels

  • la figure 1 est une représentation en perspective;
  • la figure 2 est une représentation en coupe selon la ligne brisée II-II de la figure 1 passant par les positions horaires 3h et 6h;
  • la figure 3 est une vue de dessous de la montre-bracelet représentée à la figure 1, le fond étant partiellement arraché au niveau d'une bride;
  • la figure 4 est une représentation éclatée du dispositif d'assemblage;
  • la figure 5 est une vue agrandie de la coupe II-II à la position 6h;
  • la figure 6 est une représentation éclatée de la coupe selon la ligne VI-VI de la figure 1;
The invention will be better understood by taking as an illustrative and nonlimiting example a device for assembling a ceramic cap on an oblong-shaped wristwatch, with reference to the accompanying drawings in which
  • Figure 1 is a perspective representation;
  • Figure 2 is a sectional representation along the broken line II-II of Figure 1 passing through the hour positions 3h and 6h;
  • Figure 3 is a bottom view of the wristwatch shown in Figure 1, the bottom being partially broken away at a flange;
  • Figure 4 is an exploded representation of the assembly device;
  • Figure 5 is an enlarged view of section II-II at the 6 o'clock position;
  • Figure 6 is an exploded representation of the section along the line VI-VI of Figure 1;

En se référant aux figures 1 et 2, on a représenté le boítier 1 d'une montre-bracelet dont les parties visibles sont essentiellement constituées par une coiffe 20 formant une carrure 4, dans laquelle est formé un évidement 5 pour le logement de la couronne de mise à l'heure 7. L'évidement 5 comprend en son centre une gouttière 26, visible sur la figure 4, qui rejoint la surface intérieure de la coiffe 20 pour permettre le passage de la tige de la couronne de mise à l'heure 7. La partie centrale de la coiffe 20 comprend, au-dessus d'un cadran 11 pourvu d'aiguilles heures/minutes/secondes 13a, 13b, 13c, une glace saphir 3, dont la fixation sera expliquée plus loin. Comme on le voit, la coiffe 20 laisse apparent, aux positions 12h-6h, en dessous de la carrure 4, un prolongement 8 du fond 2, incurvé vers l'extérieur sensiblement selon la courbure d'un poignet et pourvu de cornes 10 servant à la fixation d'un bracelet (non représenté). Il est bien évident qu'après la fixation d'un bracelet ce prolongement 8 ne sera plus du tout visible.Referring to Figures 1 and 2, there is shown the housing 1 of a wristwatch, the visible parts of which essentially consist of a cap 20 forming a middle part 4, in which a recess 5 is formed for housing the time setting crown 7. The recess 5 comprises in its center a gutter 26, visible in Figure 4, which joins the surface inside of the cap 20 to allow the passage of the stem of the crown setting the time 7. The central part of the cap 20 comprises, above a dial 11 provided with hour / minute / second hands 13a, 13b, 13c, a sapphire crystal 3, the fixing of which will be explained later. As one can see, the cap 20 leaves visible, at the 12h-6h positions, below the middle 4, an extension 8 of the bottom 2, curved outward substantially along the curvature of a wrist and provided with horns 10 used for fixing a bracelet (not shown). It is obvious that after attaching a bracelet this extension 8 will no longer be visible at all.

Le fond 2 et le cadran 11 délimitent, avec le cercle d'emboítage 6, un logement 9 pour un mouvement horloger 29 maintenu par deux vis de fixation 18 (visibles également sur la figure 3). La coiffe 20 a une forme oblongue et recouvre, à partir du périmètre de la glace 3, toute la surface de la montre en formant deux oreilles 28 s'étendant au-dessus des prolongements 8, en étant, comme lesdits prolongements 8 incurvées vers l'extérieur pour former une coupole.The bottom 2 and the dial 11 define, with the casing circle 6, a housing 9 for a watch movement 29 held by two fixing screws 18 (also visible in Figure 3). The cap 20 has an oblong shape and covers, from the perimeter of the glass 3, the entire surface of the watch by forming two ears 28 extending above the extensions 8, being, like said extensions 8 curved outwards to form a dome.

La figure 4 est une représentation en perpective éclatée du. dispositif d'assemblage, les différentes pièces ayant l'orientation en vue de dessous représentées à la figure 3. On voit que le dispositif comprend un centre métallique 30, une rondelle élastomère 12, deux vis 14, 16 et deux brides 15, 17 qui vont permettre l'assemblage de la coiffe 20. Figure 4 is an exploded perspective view of. device assembly, the different parts having the orientation seen from below shown in Figure 3. We see that the device includes a center metal 30, an elastomer washer 12, two screws 14, 16 and two flanges 15, 17 which will allow the assembly of the cap 20.

Comme représentée à plus grande échelle à la figure 6, la paroi intérieure de la coiffe présente une structure annulaire en escaliers constituée, depuis la base 21, par des surfaces planes orthogonales 21a, 22, 22a, 23a.As shown on a larger scale in Figure 6, the wall inside of the cap has an annular staircase structure, from base 21, by orthogonal flat surfaces 21a, 22, 22a, 23a.

Comme on le voit à la figure 5, la base 21 est prolongée au niveau des oreilles 28 par des extensions obliques 24 ayant la même inclinaison que les prolongements 8 du fond 2. La partie verticale 21a, rejoignant la base 21 et parallèle à la carrure 4, comporte au niveau des oreilles 28 deux creusures 25, 27 diamétralement opposées et destinées à recevoir les brides 15, 17. Si on excepte les opérations de polissage des surfaces extérieures, ces creusures sont les seules parties de la coiffe 20 qui nécessitent un usinage particulier. Elles peuvent par exemple être obtenues au moyen d'un meulage diamanté, ou en prévoyant, lors de la fabrication de la coiffe des tiroirs dans le moule aux emplacements des creusures 25, 27.As seen in FIG. 5, the base 21 is extended at the level of the ears 28 by oblique extensions 24 having the same inclination as the extensions 8 of the bottom 2. The vertical part 21a, joining the base 21 and parallel to the middle part 4, has at the ears 28 two recesses 25, 27 diametrically opposite and intended to receive the flanges 15, 17. If except the operations of polishing the external surfaces, these recesses are the only parts of the cap 20 which require machining particular. They can, for example, be obtained by grinding diamond, or by planning, during the manufacture of the drawer cover in the mold at the locations of the recesses 25, 27.

Le centre métallique 30 est formé d'un anneau dont la surface extérieure a une forme en escaliers, complémentaire de celle de la coiffe 20, constituée, depuis la base 31, par des surfaces planes 31a, 32, 32a, 33. La paroi interne 46 de centre métallique 30 comprend à sa base et à sa partie supérieure deux rainures annulaires 45, 47 pour recevoir des joints d'étanchéité 45a, 47a comprimés respectivement axialement contre le fond 2 et radialement contre le bord vertical 3a de la glace 3. Le fond de la rainure annulaire 47 est prolongé vers l'intérieur du boítier 1 par une bague 40 qui va former rehaut entre le bec 3b de la glace 3 et le cadran 11. Il est bien évident que cette bague 40 n'a qu'un caractère optionnel et qu'elle pourrait être remplacée par un rehaut indépendant.The metal center 30 is formed of a ring whose surface exterior has a staircase shape, complementary to that of the cover 20, formed from the base 31 by flat surfaces 31a, 32, 32a, 33. The inner wall 46 of metal center 30 comprises at its base and at its part upper two annular grooves 45, 47 for receiving seals seal 45a, 47a compressed respectively axially against the bottom 2 and radially against the vertical edge 3a of the glass 3. The bottom of the groove annular 47 is extended towards the inside of the case 1 by a ring 40 which goes form a ring between the spout 3b of the glass 3 and the dial 11. It is quite obvious that this ring 40 is only optional and that it could be replaced by an independent flange.

En se référant plus particulièrement aux figures 4 et 5 on voit que la surface 33 du centre métallique 30 comprend deux dégagements ouverts 35, 37 diamétralement opposés et destinés à recevoir les brides 15, 17. Les dégagements 35,37 comprennent dans leur partie sensiblement médiane les perçages axiaux 34, 36 dans lesquels seront engagées les vis 14, 16 de fixation des brides 15, 17. Ces dégagements 35, 37 permettent de réduire la hauteur du dispositif d'assemblage et facilitent le positionnement du centre 30 au-dessus des brides. Selon un mode de réalisation plus simple, il est également possible de ne prévoir aucun dégagement. Le centre métallique 30 comporte enfin, répartis sur son pourtour, quatre trous taraudés 39 pour la fixation du fond 2 au moyen de quatre vis 19, ainsi qu'un perçage radial 38 pour le passage de la tige de la couronne 7. Referring more particularly to Figures 4 and 5 we see that the surface 33 of the metal center 30 comprises two open clearances 35, 37 diametrically opposite and intended to receive the flanges 15, 17. The clearances 35.37 include in their substantially middle part the axial holes 34, 36 in which the screws 14, 16 of fixing the flanges 15, 17. These clearances 35, 37 make it possible to reduce the height of the assembly device and facilitate the positioning of the center 30 above the flanges. According to a simpler embodiment, it is also possible to provide no clearance. The metal center 30 finally comprises, distributed around its periphery, four tapped holes 39 for the fixing of the bottom 2 by means of four screws 19, as well as a radial bore 38 for the passage of the crown stem 7.

Comme on le voit, toutes les opérations d'usinage, qui seraient difficiles, voire impossibles à réaliser sur un matériau extra dur sont facilement réalisables sur un anneau de section initiale rectangulaire par exemple en acier ou en laiton.As we can see, all the machining operations, which would be difficult, even impossible to realize on an extra hard material are easily achievable on a ring of rectangular initial section, for example in steel or brass.

En se référant maintenant plus particulièrement aux figures 4 à 6 on indique ci-après comment le dispositif selon l'invention rend très faciles les opérations de montage ou démontage de la coiffe 20.Referring now more particularly to Figures 4 to 6 we indicates below how the device according to the invention makes it very easy to assembly or disassembly of the cap 20.

Dans une première étape, à partir de l'élément central formé par le centre métallique 30, il est possible de préassembler de façon connue tous les éléments constitutifs de la montre, glace 3 , aiguilles 13a, 13b, 13c, cadran 11, cercle d'emboítage 6 , mouvement 29 et couronne 7 , à l'exception de la coiffe 20 et du fond 2. On observera également, dans le cas où la bague 40 est remplacée par un rehaut indépendant, que le centre métallique 30 et le cercle d'emboítage 6 peuvent être réalisés en une seule pièce.In a first step, starting from the central element formed by the metal center 30, it is possible to pre-assemble in a known manner all of the constituent parts of the watch, crystal 3, hands 13a, 13b, 13c, dial 11, casing ring 6, movement 29 and crown 7, except for the cap 20 and bottom 2. We will also observe, in the case where the ring 40 is replaced by an independent flange, that the metal center 30 and the casing ring 6 can be made in one piece.

On met ensuite en place la rondelle élastomère 12 sur la surface annulaire 22 de la structure en escaliers de la coiffe 20, puis on engage les deux brides 15, 17 dans les creusures 25, 27. On pose ensuite le centre métallique 30 en positionnant les dégagements 35, 37 au-dessus des brides 15, 17, puis on visse l'ensemble au moyen des vis 14, 16 de façon à comprimer la rondelle 12 entre les surfaces annulaires en regard 22, 32 de la coiffe 20 et du centre métallique 30, et finalement on visse le fond au moyen des quatre vis 19.Then put the elastomer washer 12 on the surface annular 22 of the staircase structure of the cover 20, then the two flanges 15, 17 in the recesses 25, 27. The center is then placed metallic 30 by positioning the clearances 35, 37 above the flanges 15, 17, then the assembly is screwed by means of screws 14, 16 so as to compress the washer 12 between the annular facing surfaces 22, 32 of the cap 20 and metal center 30, and finally we screw the bottom by means of the four screws 19.

Comme on le voit sur la figure 5, les cotes des éléments assemblés et l'épaisseur de la rondelle élastomère 12 sont prévues pour qu'il existe de très faibles jeux entre les surfaces internes de la coiffe 20 et les surfaces des éléments en regard, à l'exception des surfaces 22, 32 entre lesquelles est comprimée la rondelle élastomère 12. Le jeu entre l'extension oblique 24 et le prolongement 8 du fond 2 est désigné par la référence 44, celui entre la base 21 et le fond 2 par la référence 41, celui entre la paroi 21a et la paroi correspondante 31a du centre 30 par la référence 41a, celui entre la paroi 23 et le bord externe 33 du centre 20 par la référence 43, et celui entre la paroi 23a et le bord 3a de la glace 3 par la référence 43a. Le jeu entre la paroi 22a et la surface correspondante 32a du centre est pratiquement inexistant de sorte qu'il est plus exact de dire qu'à cet endroit on a un ajustage gras. Ces jeux ont volontairement été prévus pour permettre un faible basculement de la coiffe 20 en cas de choc léger et éviter ainsi de la briser. Si le choc est trop important, et provoque un dommage irréversible de la coiffe 20, il sera très facile de la remplacer en déposant le fond 2 et en dévissant les deux vis 14, 16.As seen in Figure 5, the dimensions of the assembled elements and the thickness of the elastomer washer 12 are provided so that there are very small clearance between the internal surfaces of the cap 20 and the surfaces of the facing elements, with the exception of the surfaces 22, 32 between which is compressed the elastomer washer 12. The clearance between the oblique extension 24 and the extension 8 of the bottom 2 is designated by the reference 44, that between the base 21 and the bottom 2 by the reference 41, that between the wall 21a and the wall corresponding 31a from the center 30 by the reference 41a, that between the wall 23 and the outer edge 33 of the center 20 by the reference 43, and that between the wall 23a and the edge 3a of the glass 3 by the reference 43a. The game between wall 22a and the corresponding surface 32a of the center is practically nonexistent so it is more accurate to say that at this place we have a bold adjustment. These games have been deliberately designed to allow low tilting of the cap 20 in the event of a slight impact and thus avoid to break. If the shock is too great, and causes irreversible damage to the cap 20, it will be very easy to replace it by depositing the bottom 2 and unscrewing the two screws 14, 16.

Dans l'exemple représenté, les moyens de fixation de la coiffe sont au nombre de deux et sont positionnés sous le fond 2 aux positions 12h-6h, au niveau de la coiffe où il existe le plus de matière. En comparant les coupes des figures 5 et 6 on observera que le point des creusures 25, 27 les plus rapproché de la surface de la coiffe 20 reste le même sur tout le pourtour de ladite coiffe, de sorte qu'on peut, selon une variante d'exécution, envisager de mettre plus de deux moyens de fixation occupant des positions angulaires différentes par rapport à l'axe 12h-6h. Dans le mode de réalisation pris à titre d'exemple, on observera que les deux perçages axiaux 34, 36 et les quatre trous taraudés 39 présentent un décalage angulaire, c'est-à-dire qu'ils sont distincts et que seules sont apparentes les vis 19 de fixation du fond 2. Selon une variante d'exécution non représentée, le centre 30 ne comprend que deux trous taraudés 39 pour deux vis 19 de fixation du fond, les deux autres vis étant confondues avec les vis 14, 16 de fixation de bride 15, 17 en ayant des tiges plus longues. Par rapport au processus de montage/démontage décrit précédemment, ce mode de réalisation présente l'avantage de pouvoir remplacer la coiffe 20 sans déposer le fond 2, et donc sans risque d'endommager le joint d'étanchéité 45a.In the example shown, the means for fixing the cap are at number of two and are positioned under the bottom 2 at the 12h-6h positions, at level of the cap where there is the most material. By comparing the cuts of Figures 5 and 6 it will be observed that the point of the most hollow 25, 27 close to the surface of the cap 20 remains the same around the entire periphery of said cap, so that one can, according to an alternative embodiment, consider put more than two fixing means occupying angular positions different from the axis 12h-6h. In the embodiment taken at As an example, it will be observed that the two axial holes 34, 36 and the four tapped holes 39 have an angular offset, i.e. they are distinct and that only the screws 19 for fixing the bottom 2 are visible. According to an alternative embodiment not shown, the center 30 only comprises two tapped holes 39 for two screws 19 for fixing the bottom, the other two screws being combined with the flange fixing screws 14, 16 15, 17 having longer stems. Regarding the assembly / disassembly process described above, this embodiment has the advantage of being able to replace the cap 20 without depositing the bottom 2, and therefore without risk damage the seal 45a.

L'exemple qui vient d'être décrit concerne un cadran de forme circulaire avec une coiffe oblongue, mais il est bien évident que l'homme de métier peut, sans sortir du cadre de la présente invention, adapter ce dispositif de fixation à tout type de coiffe et à tout type de cadran.The example which has just been described concerns a dial of circular shape with an oblong cap, but it’s obvious that the skilled person can, without departing from the scope of the present invention, adapt this fixing device any type of cap and any type of dial.

Claims (8)

Dispositif d'assemblage amovible d'une coiffe (20) en matériau dur sur la partie supérieure de la carrure (4) d'une boíte de montre (1) fermée par une glace (3) et un fond (2) délimitant avec un cercle d'emboítage (6), un espace (9) pour loger au moins un mouvement (29), caractérisé en ce qu'il comprend un centre métallique (30) dont la paroi externe a une structure en escaliers (31, 31a, 32, 32a, 33) complémentaire de la structure interne (21, 21a, 22, 22a, 23, 23a) de la coiffe (20) rendue solidaire dudit centre (30) au moyen d'au moins deux vis (14, 16) le traversant à travers des perçages (34, 36) pour serrer des brides (15, 17) logées dans des creusures radiales (25, 27) formées dans une paroi (21a) verticale de la coiffe (20) en comprimant un joint élastomère (12), disposé entre deux surfaces horizontales (22, 32) des structures en escaliers, et dont l'épaisseur est suffisante pour ménager des jeux (41, 41a) au moins entre des surfaces en regard respectivement du fond (2) et de la base (21) de la coiffe (20), et de la paroi verticale (31a) du centre (30) et la paroi (21a) de la coiffe (20) rejoignant la base (21).Removable assembly device for a cap (20) of material hard on the upper part of the middle part (4) of a watch case (1) closed by a glass (3) and a bottom (2) delimiting with a casing circle (6), a space (9) for accommodating at least one movement (29), characterized in that that it comprises a metal center (30) whose external wall has a structure in stairs (31, 31a, 32, 32a, 33) complementary to the internal structure (21, 21a, 22, 22a, 23, 23a) of the cap (20) made integral with said center (30) by means of at least two screws (14, 16) passing through it through holes (34, 36) for tightening flanges (15, 17) housed in recesses radial (25, 27) formed in a vertical wall (21a) of the cap (20) in compressing an elastomeric seal (12), disposed between two surfaces horizontal (22, 32) of stair structures, and whose thickness is sufficient to provide clearances (41, 41a) at least between surfaces in look respectively at the bottom (2) and the base (21) of the cap (20), and the vertical wall (31a) of the center (30) and the wall (21a) of the cover (20) joining the base (21). Dispositif selon la revendication 1, caractérisé en ce que le centre (30) comprend en outre des dégagements (35, 37) ouverts vers la coiffe (20) aux emplacements des brides (15, 17) et ayant sensiblement pour profondeur l'épaisseur desdites brides (15, 17).Device according to claim 1, characterized in that the center (30) further comprises recesses (35, 37) open towards the cap (20) at the locations of the flanges (15, 17) and having substantially for depth the thickness of said flanges (15, 17). Dispositif selon la revendication 1, caractérisé en ce que le centre (30) comprend en outre des trous taraudés (39) décalés angulairement par rapport aux perçages pour les vis (14, 16) de bride (15, 17) et permettant la fixation du fond (2) au moyen de vis (19).Device according to claim 1, characterized in that the center (30) further includes tapped holes (39) angularly offset by relative to the holes for the flange screws (14, 16) (15, 17) and allowing fixing the bottom (2) by means of screws (19). Dispositif selon la revendication 3, caractérisé en ce que deux vis (14, 16) de fixation de bride (15, 17) permettent aussi la fixation du fond (2).Device according to claim 3, characterized in that two screws (14, 16) flange fixing (15, 17) also allow the fixing of the bottom (2). Dispositif selon la revendication 1, caractérisé en ce que la coiffe (20) a une forme oblongue et comporte deux creusures (25, 27) positionnées à 12h et 6h.Device according to claim 1, characterized in that the cap (20) has an oblong shape and has two recesses (25, 27) positioned at 12 p.m. and 6 a.m. Dispositif selon la revendication 1, caractérisé en ce que les bords internes du centre (20) comportent en outre deux rainures (45, 47) destinées à recevoir deux joints (45a, 47a) permettant d'assurer l'étanchéité avec le fond (2) et avec la glace (3). Device according to claim 1, characterized in that the edges internal of the center (20) further comprise two grooves (45, 47) intended to receive two seals (45a, 47a) making it possible to seal with the bottom (2) and with ice (3). Dispositif selon la revendication 1, caractérisé en ce que la partie supérieure de la paroi interne du centre (30) comprend une extension annulaire (40) formant rehaut.Device according to claim 1, characterized in that the part top of the inner wall of the center (30) includes an extension annular (40) forming flange. Dispositif selon la revendication 1, caractérisé en ce que le centre (30) et le cercle d'emboítage (6) sont confondus en une seule pièce.Device according to claim 1, characterized in that the center (30) and the socket circle (6) are combined in one piece.
EP99122881A 1999-11-17 1999-11-17 Device for assembling a cap made of hard material to the middle part of a watch Expired - Lifetime EP1102136B1 (en)

Priority Applications (2)

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DE69940381T DE69940381D1 (en) 1999-11-17 1999-11-17 Device for placing a protective cap made of hard material on the middle part of a clock
EP99122881A EP1102136B1 (en) 1999-11-17 1999-11-17 Device for assembling a cap made of hard material to the middle part of a watch

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EP99122881A EP1102136B1 (en) 1999-11-17 1999-11-17 Device for assembling a cap made of hard material to the middle part of a watch

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Cited By (5)

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US7967504B2 (en) 2008-04-01 2011-06-28 Montres Rado S.A. Push-button control device for a watch
CN103343765A (en) * 2013-05-21 2013-10-09 张宝喜 Split type metal entity connection device for wrist watch, pocket watch and jewelry
CN104317181A (en) * 2014-08-26 2015-01-28 上海稻房投资有限公司 Ceramic-backboard-contained waterproof watch
CN107193200A (en) * 2017-07-19 2017-09-22 深圳市雷诺表业有限公司 The wrist-watch combining structure and wrist-watch of a kind of rotatable fast quick-detach
CN109375490A (en) * 2018-11-16 2019-02-22 深圳市稳达时钟表有限公司 A kind of assemble method of combined type DIY wrist-watch and combined type DIY wrist-watch

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CH517963A (en) 1960-10-05 1972-02-29 Schlup & Cie S A Watch box
CH508925A (en) 1968-09-27 1971-02-15 Piquerez Sa Ervin Wristwatch with protective screen
CH506826A (en) 1968-11-25 1970-10-30 Georges Ruedin S A Watch box
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CH568040A5 (en) 1973-09-14 1975-12-15 Weill Ernst Tooth brush with rotatable head - enables vertical cleaning movements to be made more easily and efficiently
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7967504B2 (en) 2008-04-01 2011-06-28 Montres Rado S.A. Push-button control device for a watch
CN103343765A (en) * 2013-05-21 2013-10-09 张宝喜 Split type metal entity connection device for wrist watch, pocket watch and jewelry
CN104317181A (en) * 2014-08-26 2015-01-28 上海稻房投资有限公司 Ceramic-backboard-contained waterproof watch
CN107193200A (en) * 2017-07-19 2017-09-22 深圳市雷诺表业有限公司 The wrist-watch combining structure and wrist-watch of a kind of rotatable fast quick-detach
CN109375490A (en) * 2018-11-16 2019-02-22 深圳市稳达时钟表有限公司 A kind of assemble method of combined type DIY wrist-watch and combined type DIY wrist-watch

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Publication number Publication date
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