EP1155630A1 - Articulated metallic bracelet - Google Patents

Articulated metallic bracelet Download PDF

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Publication number
EP1155630A1
EP1155630A1 EP00110470A EP00110470A EP1155630A1 EP 1155630 A1 EP1155630 A1 EP 1155630A1 EP 00110470 A EP00110470 A EP 00110470A EP 00110470 A EP00110470 A EP 00110470A EP 1155630 A1 EP1155630 A1 EP 1155630A1
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EP
European Patent Office
Prior art keywords
plates
pins
bracelet
diameter
pin
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Granted
Application number
EP00110470A
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German (de)
French (fr)
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EP1155630B1 (en
Inventor
Pierre Dr. Buise
Bernhard M. Matthey
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PROMOTION SpA
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PROMOTION SpA
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Publication date
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Priority to EP00110470A priority Critical patent/EP1155630B1/en
Priority to AT00110470T priority patent/ATE281089T1/en
Priority to DE60015505T priority patent/DE60015505D1/en
Publication of EP1155630A1 publication Critical patent/EP1155630A1/en
Application granted granted Critical
Publication of EP1155630B1 publication Critical patent/EP1155630B1/en
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    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
    • A44C5/00—Bracelets; Wrist-watch straps; Fastenings for bracelets or wrist-watch straps
    • A44C5/02—Link constructions
    • A44C5/10—Link constructions not extensible
    • A44C5/107—Link constructions not extensible with links made of more than two elements including connecting elements

Definitions

  • the present invention relates to watch straps, of the type metallic with links.
  • These bracelets are made up of metal plates linked together articulated way by means of pins rigidly fixed to some of these inserts and rotatably mounted in the other inserts, so to form hinges.
  • a bracelet of this type is described in document EP 0 749 709.
  • the pins used have a cylindrical structure of non-circular section. A such a solution allows precise driving of the pins into the pads with which they are rigidly fixed.
  • the object of the present invention is to overcome this drawback.
  • the bracelet according to the invention is formed of metal plates and pins connecting the plates together, in an articulated manner.
  • Each pin which is of non-circular cylindrical shape, is rigidly fixed to at least one plate, by engagement in a blind hole thereof, and movably mounted in rotation in at least one other plate, thereby forming a hinge.
  • This bracelet is characterized in that the pins and plates in which they are rigidly fixed form pairs made in materials likely to ally with each other and in that these pairs have an area in which the plate and the pin are welded together to the other.
  • the pin installed it is common for the pin installed to make a stopper and compresses the air in the blind hole in the insert.
  • the air trapped in the blind hole is expanded while part of the metal forming the wall of this hole is molten. As a result, this molten metal is projected under the effect of pressure, to let trapped air pass.
  • the pins and the plates are made of the same material. This also allows avoid corrosion by galvanic effect.
  • the latter In order to ensure optimal installation conditions while retaining the pins with sufficient rigidity, the latter have a section inscribed in a first circle of diameter D and circumscribed in a second circle of diameter d , the ratio D / d being understood between 1.02 and 1.2.
  • the means to be used to manufacture the bracelet represent a significant part of the cost price. This is why it is advantageous to be able to carry out the assembly and welding operations in a completely autonomous manner. In other words, it is necessary that the wafers sufficiently hold the pins, before the welding operation, without having to resort to auxiliary means.
  • the holes of the plates, in which the pins are rigidly fixed have a diameter less than D and greater than d .
  • the diameter of these holes is substantially equal to the average of D and d .
  • the bracelet according to the invention includes pins 10, three variants of which are shown in section in Figures 1a, 1b and 1c, and metallic plates of a first type 12 (FIG. 2) and of a second type 14 (Figure 3).
  • Both the pins 10 and the plates 12 and 14 are made of stainless steel, for example example of the type known under the name 316L.
  • the pin 10 shown in section in Figure 1a is formed of a cylindrical rod of non-circular section, having three lobes 10a connected together by a convex rounded 10b.
  • This section can be defined by an inscribed circle c and a circumscribed circle C , having diameters d and D respectively .
  • D is equal to 1.23 mm
  • d is equal to 1.17 mm.
  • the D / d ratio is equal to 1.05.
  • the radius of curvature of the rounding is, of course, greater than the radius of the lobes. It is also possible to connect the lobes with a straight line.
  • the pin 10 is round with two parallel planar faces 10c.
  • the circle C has a diameter D equal to the diameter of the pin 10
  • the circle c tangent to the two plane faces 10c, has a diameter d equal to the distance between these two faces.
  • the pin 10 of Figure 1c is also round of diameter D. It has a groove 10d whose depth does not exceed 0.2 D. In this way, if we pass a circle c inscribed and tangent to the walls of the pin 10, of diameter d , the ratio D / d is less than 1.2. In this way, the solidity of the pin 10 is not significantly affected.
  • the plate 12 shown in Figure 2 is intended to be placed on the side edges of the bracelet. It is generally rectangular in shape, with upper 12a and lower 12b faces intended to form respectively part of the top and bottom of the bracelet and two side faces 12c and 12d.
  • the lateral face 12c is smooth while the face 12d is pierced with two blind cylindrical holes 16, the axes of which are parallel to each other and perpendicular to the lateral surface 12d, only one of which is visible in this figure.
  • These holes 16 have a diameter e greater than d and less than D. In the embodiment described, it is equal to 1.20 mm, the average of D and d .
  • the hole has a depth at least twice its diameter.
  • the wall between the hole 16 and the lower face 12b of the plate is equal to approximately half the diameter of hole 16, or 0.60 mm.
  • the plate 14 of FIG. 3 is also of generally rectangular shape, with an upper face 14a, a lower face 14b and two lateral faces 14c and 14d. It has the same length as the plate 12. Depending on the model, the thicknesses of its plates 12 and 14 can also be the same. It is pierced with two holes 18, mutually parallel and perpendicular to the side faces 14c and 14d, of diameter E slightly greater than D , so that the pins 14, intended to be housed there, can rotate there freely.
  • the bracelet portion shown in Figure 4, has two rows of plates 12, forming the side edges of the bracelet and five rows of plates 14 arranged in the middle part.
  • the plates 12 and 14 are staggered, with an offset equal to half a length of the pads.
  • the holes 16 and 18 of the plates 12 and 14 were drilled so that, in this position, the adjoining holes are aligned.
  • the plates are assembled by means of pins 10 engaged freely in the holes 18 of the plates 14 and forced into the holes 16 of the plates 12.
  • the pins 10 are freely engaged in the holes 18 of the plates 14, because the diameter E of these holes is greater than D.
  • pins 10 are engaged, in pairs, in two plates 12 arranged on either side of the bracelet, while at least one intermediate plate 14 is crossed by pins fixed to neighboring plates 12, thus forming links articulated with each other by hinges.
  • the rigid and non-removable assembly of the plates 12 with the pins 10 is produced by welding. Specifically, when the pads and pins are assembled, the assembly thus produced is placed on a machine provided of a power laser and comprising positioning means which allow the bracelet to be positioned so that the laser beam is oriented correctly compared to platelets.
  • the laser emits, under a neutral atmosphere, a substantially directed pulse perpendicular to the underside 12b of the plates 12, in line with the holes 16.
  • the power of the pulse is chosen so that all the thickness of the wall and part of the underlying pin 10 reach a temperature above the melting point of steel, which means that these parts are welded to each other.
  • the volume brought to the melting point is limited to the immediate vicinity of the target point by the laser beam. This volume is visible at 20 in FIG. 4. Because of the melting of the material, it forms a scar 22 also visible on this figure. This scar, which can be concave or convex depending on the conditions of work, can be eliminated by a mechanical finishing operation.
  • the air in the space between the end of the pin 10 and the bottom of the hole 16 is heated and expands. As there is a space between the wall of the hole 16 and the pin 10, the air can escape and the pressure in the bottom of the hole rises very little. Of the so the risk of molten metal splashing is completely eliminated. Through elsewhere, the weld, as carried out, ensures a quality fixation, even in a hostile environment, preventing any risk of inadvertent dismantling.
  • pins and the plates can, of course, be the subject of numerous variants without departing from the scope of the invention. So the pins and the plates could be made of other materials, for example in gold or titanium alloys.
  • the plates intended to be welded with the pins and these are made of materials that can be welded to each other.
  • the materials are identical, so as to avoid galvanic type corrosion.

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Abstract

Band is made of metallic plates (12,14) linked together by pins (10). The pins have at least one end engaged in a blind hole (16) and heat sealed (20) within and are going though other plates.

Description

La présente invention se rapporte aux bracelets pour montres, du type métallique à maillons.The present invention relates to watch straps, of the type metallic with links.

Ces bracelets sont formés de plaquettes métalliques reliées entre elles de manière articulée au moyen de goupilles fixées rigidement à certaines de ces plaquettes et montées mobiles en rotation dans les autres plaquettes, de manière à former des charnières.These bracelets are made up of metal plates linked together articulated way by means of pins rigidly fixed to some of these inserts and rotatably mounted in the other inserts, so to form hinges.

Un bracelet de ce type est décrit dans le document EP 0 749 709. Les goupilles utilisées présentent une structure cylindrique de section non circulaire. Une telle solution permet un chassage précis des goupilles dans les plaquettes avec lesquelles elles sont fixées rigidement.A bracelet of this type is described in document EP 0 749 709. The pins used have a cylindrical structure of non-circular section. A such a solution allows precise driving of the pins into the pads with which they are rigidly fixed.

Lorsque le bracelet est porté, des agents chimiques peuvent pénétrer dans l'interstice compris entre la goupille et la plaquette avec laquelle elle est rigidement fixée et provoquer une corrosion. La durabilité de l'assemblage est ainsi affectée. Le but de la présente invention est de pallier cet inconvénient.When the bracelet is worn, chemical agents can enter the gap between the pin and the insert with which it is rigidly fixed and cause corrosion. The durability of the assembly is thus affected. The object of the present invention is to overcome this drawback.

Le bracelet selon l'invention est formé de plaquettes métalliques et de goupilles reliant entre elles les plaquettes, de manière articulée. Chaque goupille, qui est de forme cylindrique non circulaire, est fixée rigidement à au moins une plaquette, par engagement dans un trou borgne de celle-ci, et montée mobile en rotation dans au moins une autre plaquette, pour former ainsi une charnière.The bracelet according to the invention is formed of metal plates and pins connecting the plates together, in an articulated manner. Each pin, which is of non-circular cylindrical shape, is rigidly fixed to at least one plate, by engagement in a blind hole thereof, and movably mounted in rotation in at least one other plate, thereby forming a hinge.

Ce bracelet est caractérisé en ce que les goupilles et les plaquettes dans lesquelles elles sont fixées rigidement forment des paires réalisées en des matériaux susceptibles de s'allier les uns aux autres et en ce que ces paires comportent une zone dans laquelle la plaquette et la goupille sont soudées l'une à l'autre.This bracelet is characterized in that the pins and plates in which they are rigidly fixed form pairs made in materials likely to ally with each other and in that these pairs have an area in which the plate and the pin are welded together to the other.

Le fait que plaquettes et goupilles soient soudées les unes aux autres permet de garantir un assemblage parfaitement rigide sans risque de désassemblage, même en cas de corrosion. De plus, la forme particulière de la goupille permet de résoudre un problème qui se pose lors de l'assemblage par soudure. Il a, en effet, été constaté qu'une soudure ne pouvait assurer un assemblage solide et de qualité que dans la mesure où les diamètres du trou et de la goupille sont très proches.The fact that plates and pins are welded to each other allows guarantee a perfectly rigid assembly without risk of disassembly, even in the event of corrosion. In addition, the particular shape of the pin allows to solve a problem which arises during assembly by welding. He has, in Indeed, it was found that a weld could not ensure a solid assembly and quality only to the extent that the diameters of the hole and the pin are very relatives.

Dans ce cas, il est fréquent que la goupille mis en place fasse bouchon et comprime l'air dans le trou borgne de la plaquette. Or, pendant l'opération de soudage, l'air enfermé dans le trou borgne est dilaté alors qu'une partie du métal formant la paroi de ce trou est en fusion. Il en résulte que ce métal en fusion est projeté sous l'effet de la pression, pour laisser passer l'air emprisonné.In this case, it is common for the pin installed to make a stopper and compresses the air in the blind hole in the insert. However, during the operation of welding, the air trapped in the blind hole is expanded while part of the metal forming the wall of this hole is molten. As a result, this molten metal is projected under the effect of pressure, to let trapped air pass.

De tels bracelets sont inutilisables, d'une part à cause des trous formés dans sa face en contact avec le bras du porteur, d'autre part car la solidité des soudures ne peut être garantie.Such bracelets are unusable, on the one hand because of the holes formed in its face in contact with the wearer's arm, on the other hand because the solidity of the welds cannot be guaranteed.

Les essais effectués ont montrés que les conditions les plus favorables étaient obtenues lorsque les plaquettes et les goupilles formant les paires sont réalisées chacune dans un matériau choisi parmi l'acier inoxydable et les alliages de titane ou d'or.Tests have shown that the most favorable conditions are obtained when the plates and the pins forming the pairs are produced each in a material chosen from stainless steel and alloys titanium or gold.

Pour que la soudure tienne parfaitement, il est préférable que les goupilles et les plaquettes soient réalisées dans un même matériau. Cela permet, en outre d'éviter une corrosion par effet galvanique.For the weld to hold perfectly, it is preferable that the pins and the plates are made of the same material. This also allows avoid corrosion by galvanic effect.

Afin d'assurer des conditions de mise en place optimales tout en conservant aux goupilles une rigidité suffisante, ces dernières présentent une section inscrite dans un premier cercle de diamètre D et circonscrite dans un second cercle de diamètre d, le rapport D/d étant compris entre 1.02 et 1.2.In order to ensure optimal installation conditions while retaining the pins with sufficient rigidity, the latter have a section inscribed in a first circle of diameter D and circumscribed in a second circle of diameter d , the ratio D / d being understood between 1.02 and 1.2.

Les moyens à mettre en oeuvre pour fabriquer le bracelet représentent une part importante du prix de revient. C'est pourquoi il est avantageux de pouvoir effectuer les opérations d'assemblage et de soudage de manière tout à fait autonome. En d'autres termes, il faut que les plaquettes tiennent suffisamment aux goupilles, avant l'opération de soudage, sans devoir faire appel à des moyens auxiliaires. A cet effet, les trous des plaquettes, dans lesquels les goupilles sont fixées rigidement, présentent un diamètre inférieur à D et supérieur à d.The means to be used to manufacture the bracelet represent a significant part of the cost price. This is why it is advantageous to be able to carry out the assembly and welding operations in a completely autonomous manner. In other words, it is necessary that the wafers sufficiently hold the pins, before the welding operation, without having to resort to auxiliary means. For this purpose, the holes of the plates, in which the pins are rigidly fixed, have a diameter less than D and greater than d .

De manière avantageuse, le diamètre de ces trous est sensiblement égal à la moyenne de D et d.Advantageously, the diameter of these holes is substantially equal to the average of D and d .

D'autres avantages et caractéristiques de l'invention ressortiront de la description qui va suivre, faite en regard du dessin annexé, dans lequel:

  • 1. Les figures 1 à 3 représentent les différentes pièces constitutives du bracelet selon l'invention;
  • 2. La figure 4 montre, en perspective, une portion de ce bracelet.
    • Other advantages and characteristics of the invention will emerge from the description which follows, given with reference to the appended drawing, in which:
  • 1. Figures 1 to 3 show the different parts of the bracelet according to the invention;
  • 2. Figure 4 shows, in perspective, a portion of this bracelet.

    • Le bracelet selon l'invention, donné ici à titre d'exemple, comporte des goupilles 10, dont trois variantes sont représentées en coupe aux figures 1a, 1b et 1c, et des plaquettes métalliques d'un premier type 12 (figure 2) et d'un deuxième type 14 (figure 3).The bracelet according to the invention, given here by way of example, includes pins 10, three variants of which are shown in section in Figures 1a, 1b and 1c, and metallic plates of a first type 12 (FIG. 2) and of a second type 14 (Figure 3).

    Tant les goupilles 10 que les plaquettes 12 et 14 sont en acier inoxydable, par exemple du type connu sous la dénomination 316L. Both the pins 10 and the plates 12 and 14 are made of stainless steel, for example example of the type known under the name 316L.

    La goupille 10, représenté en coupe sur la figure 1a, est formée d'une tige cylindrique de section non circulaire, présentant trois lobes 10a reliés entre eux par un arrondi convexe 10b. Cette section peut être définie par un cercle inscrit c et un cercle circonscrit C, présentant respectivement des diamètres d et D. De manière typique, D est égal à 1,23 mm, alors que d est égal 1,17 mm. De la sorte, le rapport D/d est égal à 1,05. L'expérience a montré que des conditions satisfaisantes de travail pouvaient sans autre être obtenue lorsque ce rapport est compris entre 1,02 et 1,2.The pin 10, shown in section in Figure 1a, is formed of a cylindrical rod of non-circular section, having three lobes 10a connected together by a convex rounded 10b. This section can be defined by an inscribed circle c and a circumscribed circle C , having diameters d and D respectively . Typically, D is equal to 1.23 mm, while d is equal to 1.17 mm. In this way, the D / d ratio is equal to 1.05. Experience has shown that satisfactory working conditions could be achieved without further when this ratio is between 1.02 and 1.2.

    Le rayon de courbure de l'arrondi est, bien entendu, supérieur au rayon des lobes. Il est également possible de relier les lobes par une droite.The radius of curvature of the rounding is, of course, greater than the radius of the lobes. It is also possible to connect the lobes with a straight line.

    Dans le mode de réalisation de la figure 1b, la goupille 10 est ronde avec deux faces planes parallèles 10c. Dans ce cas, le cercle C a un diamètre D égal au diamètre de la goupille 10, alors que le cercle c, tangent aux deux faces planes 10c, a un diamètre d égal à la distance comprise entre ces deux faces.In the embodiment of Figure 1b, the pin 10 is round with two parallel planar faces 10c. In this case, the circle C has a diameter D equal to the diameter of the pin 10, while the circle c , tangent to the two plane faces 10c, has a diameter d equal to the distance between these two faces.

    La goupille 10 de la figure 1c est également ronde de diamètre D. Elle comporte une gorge 10d dont la profondeur ne dépasse pas 0.2 D. De la sorte, si l'on fait passer un cercle c inscrit et tangent aux parois de la goupille 10, de diamètre d, le rapport D/d est inférieur à 1,2. De la sorte, la solidité de la goupille 10 n'est pas affectée de manière sensible.The pin 10 of Figure 1c is also round of diameter D. It has a groove 10d whose depth does not exceed 0.2 D. In this way, if we pass a circle c inscribed and tangent to the walls of the pin 10, of diameter d , the ratio D / d is less than 1.2. In this way, the solidity of the pin 10 is not significantly affected.

    La plaquette 12, représentée à la figure 2, est destinée à être placée sur les bords latéraux du bracelet. Elle est de forme générale parallélépipédique, avec des faces supérieure 12a et inférieure 12b destinées à former respectivement une partie du dessus et du dessous du bracelet et deux faces latérales 12c et 12d.The plate 12, shown in Figure 2, is intended to be placed on the side edges of the bracelet. It is generally rectangular in shape, with upper 12a and lower 12b faces intended to form respectively part of the top and bottom of the bracelet and two side faces 12c and 12d.

    La face latérale 12c est lisse alors que la face 12d est percée de deux trous cylindriques borgnes 16, dont les axes sont parallèles entre eux et perpendiculaires à la surface latérale 12d, l'un seulement étant visible sur cette figure. Ces trous 16 ont un diamètre e supérieur à d et inférieur à D. Dans l'exemple de réalisation décrit, il est égal à 1,20 mm, soit la moyenne de D et d. Le trou a une profondeur au moins égale à deux fois son diamètre.The lateral face 12c is smooth while the face 12d is pierced with two blind cylindrical holes 16, the axes of which are parallel to each other and perpendicular to the lateral surface 12d, only one of which is visible in this figure. These holes 16 have a diameter e greater than d and less than D. In the embodiment described, it is equal to 1.20 mm, the average of D and d . The hole has a depth at least twice its diameter.

    La paroi comprise entre le trou 16 et la face inférieure 12b de la plaquette est égale à environ la moitié du diamètre du trou 16, soit 0,60 mm.The wall between the hole 16 and the lower face 12b of the plate is equal to approximately half the diameter of hole 16, or 0.60 mm.

    La plaquette 14 de la figure 3 est également de forme générale parallélépipédique, avec une face supérieure 14a, une face inférieure 14b et deux faces latérales 14c et 14d. Elle a la même longueur que la plaquette 12. Selon le modèle, les épaisseurs de ses plaquettes 12 et 14 peuvent également être les mêmes. Elle est percée de deux trous 18, parallèles entre eux et perpendiculaires aux faces latérales 14c et 14d, de diamètre E légèrement supérieur à D, de manière à ce que les goupilles 14, destinées à y être logées, puissent y tourner librement.The plate 14 of FIG. 3 is also of generally rectangular shape, with an upper face 14a, a lower face 14b and two lateral faces 14c and 14d. It has the same length as the plate 12. Depending on the model, the thicknesses of its plates 12 and 14 can also be the same. It is pierced with two holes 18, mutually parallel and perpendicular to the side faces 14c and 14d, of diameter E slightly greater than D , so that the pins 14, intended to be housed there, can rotate there freely.

    Il va de soi que les formes des faces latérales de plaquettes 2 et supérieures des plaquettes 12 et 14 peuvent être considérablement travaillées pour donner au bracelet sa spécificité esthétique.It goes without saying that the shapes of the lateral faces of plates 2 and upper of the pads 12 and 14 can be significantly worked to give the bracelet its specific aesthetic.

    La portion de bracelet, représentée à la figure 4, comporte deux rangs de plaquettes 12, formant les bords latéraux du bracelet et cinq rangs de plaquettes 14 disposés dans la partie médiane.The bracelet portion, shown in Figure 4, has two rows of plates 12, forming the side edges of the bracelet and five rows of plates 14 arranged in the middle part.

    Dans le sens longitudinal, les plaquettes 12 et 14 sont placées en quinconce, avec un décalage égal à une demi-longueur des plaquettes. Dans cette position, Les trous 16 et 18 des plaquettes 12 et 14 ont été percées de manière que, dans cette position, les trous contigus soient alignés. Les plaquettes sont assemblées au moyen de goupilles 10 engagées libres dans les trous 18 des plaquettes 14 et forcées dans les trous 16 des plaquettes 12. In the longitudinal direction, the plates 12 and 14 are staggered, with an offset equal to half a length of the pads. In this position, The holes 16 and 18 of the plates 12 and 14 were drilled so that, in this position, the adjoining holes are aligned. The plates are assembled by means of pins 10 engaged freely in the holes 18 of the plates 14 and forced into the holes 16 of the plates 12.

    Comme le diamètre e des trous 16 est inférieur à D, les goupilles doivent y être engagées à force. Il reste, toutefois, un jour entre la paroi du trou 16 et la goupille 10 du fait que e est supérieur à d.As the diameter e of the holes 16 is less than D , the pins must be forced into it. There remains, however, one day between the wall of the hole 16 and the pin 10 because e is greater than d .

    Les goupilles 10 sont engagées librement dans les trous 18 des plaquettes 14, car le diamètre E de ces trous est supérieur à D.The pins 10 are freely engaged in the holes 18 of the plates 14, because the diameter E of these holes is greater than D.

    Pour assurer une articulation du bracelet, il est nécessaire que les goupilles 10 soient engagées, par paires, dans deux plaquettes 12 disposées de part et d'autre du bracelet, alors qu'au moins une plaquette 14 intermédiaire est traversée par des goupilles fixées à des plaquettes 12 voisines, formant ainsi des maillons articulés les uns avec les autres par des charnières.To ensure articulation of the bracelet, it is necessary that the pins 10 are engaged, in pairs, in two plates 12 arranged on either side of the bracelet, while at least one intermediate plate 14 is crossed by pins fixed to neighboring plates 12, thus forming links articulated with each other by hinges.

    L'assemblage rigide et indémontable des plaquettes 12 avec les goupilles 10 est réalisé par soudure. Plus précisément, lorsque les plaquettes et les goupilles sont assemblées, l'ensemble ainsi réalisé est disposé sur une machine munie d'un laser de puissance et comportant des moyens de positionnement qui permettent de placer le bracelet de manière que le faisceau laser soit orienté correctement par rapport aux plaquettes.The rigid and non-removable assembly of the plates 12 with the pins 10 is produced by welding. Specifically, when the pads and pins are assembled, the assembly thus produced is placed on a machine provided of a power laser and comprising positioning means which allow the bracelet to be positioned so that the laser beam is oriented correctly compared to platelets.

    Le laser émet, sous atmosphère neutre, une impulsion dirigée sensiblement perpendiculairement à la face inférieure 12b des plaquettes 12, au droit des trous 16. La puissance de l'impulsion est choisie de manière à ce que toute l'épaisseur de la paroi et une part de la goupille 10 sous-jacente atteignent une température supérieure au point de fusion de l'acier, ce qui fait que ces pièces sont soudées l'une à l'autre. A cause de la très courte durée de l'impulsion, le volume amené au point de fusion se limite au voisinage immédiat du point visé par le faisceau laser. Ce volume est visible en 20 sur la figure 4. A cause de la fusion de la matière, il se forme une cicatrice 22 également visible sur cette figure. Cette cicatrice, qui peut être concave ou convexe selon les conditions de travail, peut être éliminée par une opération de finition mécanique. The laser emits, under a neutral atmosphere, a substantially directed pulse perpendicular to the underside 12b of the plates 12, in line with the holes 16. The power of the pulse is chosen so that all the thickness of the wall and part of the underlying pin 10 reach a temperature above the melting point of steel, which means that these parts are welded to each other. Because of the very short duration of the pulse, the volume brought to the melting point is limited to the immediate vicinity of the target point by the laser beam. This volume is visible at 20 in FIG. 4. Because of the melting of the material, it forms a scar 22 also visible on this figure. This scar, which can be concave or convex depending on the conditions of work, can be eliminated by a mechanical finishing operation.

    Durant l'opération de soudage, l'air se trouvant dans l'espace compris entre l'extrémité de la goupille 10 et le fond du trou 16 est chauffé et se dilate. Comme il existe un espace entre la paroi du trou 16 et la goupille 10, l'air peut s'échapper et la pression dans le fond du trou ne s'élève que très peu. De la sorte, le risque de projection de métal en fusion est totalement éliminé. Par ailleurs, la soudure, telle que réalisée, assure une fixation de qualité, même dans un milieu hostile, empêchant tout risque de démontage intempestif.During the welding operation, the air in the space between the end of the pin 10 and the bottom of the hole 16 is heated and expands. As there is a space between the wall of the hole 16 and the pin 10, the air can escape and the pressure in the bottom of the hole rises very little. Of the so the risk of molten metal splashing is completely eliminated. Through elsewhere, the weld, as carried out, ensures a quality fixation, even in a hostile environment, preventing any risk of inadvertent dismantling.

    L'invention, telle que décrite, peut, bien sûr, faire l'objet de nombreuses variantes sans pour autant sortir du cadre de l'invention. Ainsi, les goupilles et les plaquettes pourraient être réalisées dans d'autres matériaux, par exemple en alliages d'or ou de titane.The invention, as described, can, of course, be the subject of numerous variants without departing from the scope of the invention. So the pins and the plates could be made of other materials, for example in gold or titanium alloys.

    Dans tous les cas, les plaquettes destinées à être soudées avec les goupilles et ces dernières sont faites dans des matériaux pouvant se souder l'un à l'autre. Avantageusement, les matériaux sont identiques, de manière à éviter une corrosion de type galvanique.In all cases, the plates intended to be welded with the pins and these are made of materials that can be welded to each other. Advantageously, the materials are identical, so as to avoid galvanic type corrosion.

    La directrice choisie, définissant la section des goupilles, peut également faire l'objet de nombreuses variantes. Il suffit que la forme retenue garantisse les conditions suivantes:

  • 1. fabrication de la goupille par tréfilage,
  • 2. bon serrage dans le trou au moment de la mise en place,
  • 3. surfaces de contact importantes pour faciliter la soudure, et
  • 4. espaces suffisants pour permettre à l'air de s'échapper lors de l'opération de soudage.
    • The director chosen, defining the section of the pins, can also be the subject of numerous variants. It suffices that the chosen form guarantees the following conditions:
  • 1. manufacture of the pin by drawing,
  • 2. good tightening in the hole at the time of installation,
  • 3. large contact surfaces to facilitate welding, and
  • 4. Sufficient space to allow air to escape during the welding operation.

    • Claims (6)

    Bracelet comportant des plaquettes métalliques (12, 14) et de goupilles (10) reliant entre elles les plaquettes de manière articulée, dans lequel chaque goupille, qui a la forme d'un cylindre dont la directrice est une figure géométrique autre qu'un cercle, est fixée rigidement à au moins une plaquette (12), par engagement dans un trou borgne (16) de celle-ci, et montée mobile en rotation dans au moins une autre plaquette (14), pour former ainsi une charnière, caractérisé en ce que les goupilles et les plaquettes dans lesquelles elles sont fixées rigidement forment des paires réalisées en des matériaux susceptibles de s'allier les uns aux autres et en ce que lesdites paires comportent une zone (20) dans laquelle la plaquette (12) et la goupille (10) sont soudées l'une à l'autre.Bracelet comprising metal plates (12, 14) and pins (10) connecting the plates together in an articulated manner, in which each pin, which has the shape of a cylinder whose director is a geometric figure other than a circle , is rigidly fixed to at least one plate (12), by engagement in a blind hole (16) thereof, and rotatably mounted in at least one other plate (14), to thereby form a hinge, characterized in that the pins and the plates in which they are rigidly fixed form pairs made of materials capable of alloying with each other and in that said pairs comprise a zone (20) in which the plate (12) and the pin (10) are welded to each other. Bracelet selon la revendication 1, caractérisé en ce que les plaquettes et les goupilles formant lesdites paires sont réalisées chacune dans un matériau choisi parmi l'acier inoxydable, les alliages de titane ou d'or.Bracelet according to claim 1, characterized in that the plates and the pins forming said pairs are each made of a material chosen from stainless steel, titanium or gold alloys. Bracelet selon la revendication 2, caractérisé en ce que les plaquettes et les goupilles formant lesdites paires sont formées du même matériau.Bracelet according to claim 2, characterized in that the plates and the pins forming said pairs are made of the same material. Bracelet selon l'une des revendications 1 et 3, caractérisé en ce que lesdites goupilles présentent une section inscrite dans un premier cercle de diamètre D et circonscrite dans un second cercle de diamètre d, dans lequel le rapport D/d est compris entre 1.02 et 1.2.Bracelet according to one of claims 1 and 3, characterized in that said pins have a section inscribed in a first circle of diameter D and circumscribed in a second circle of diameter d , in which the ratio D / d is between 1.02 and 1.2. Bracelet selon la revendication 4, caractérisé en ce que les trous (16) des plaquettes dans lesquels les goupilles sont fixées rigidement présentent un diamètre e inférieur à D et supérieur à d.Bracelet according to claim 4, characterized in that the holes (16) of the plates in which the pins are rigidly fixed have a diameter e less than D and greater than d . Bracelet selon la revendication 5, caractérisé en ce que le diamètre e desdits trous (16) est sensiblement égal à la moyenne de D et d.Bracelet according to claim 5, characterized in that the diameter e of said holes (16) is substantially equal to the average of D and d .
    EP00110470A 2000-05-17 2000-05-17 Articulated metallic bracelet Expired - Lifetime EP1155630B1 (en)

    Priority Applications (3)

    Application Number Priority Date Filing Date Title
    EP00110470A EP1155630B1 (en) 2000-05-17 2000-05-17 Articulated metallic bracelet
    AT00110470T ATE281089T1 (en) 2000-05-17 2000-05-17 METALLIC LINK BRACELET
    DE60015505T DE60015505D1 (en) 2000-05-17 2000-05-17 Metallic link bracelet

    Applications Claiming Priority (1)

    Application Number Priority Date Filing Date Title
    EP00110470A EP1155630B1 (en) 2000-05-17 2000-05-17 Articulated metallic bracelet

    Publications (2)

    Publication Number Publication Date
    EP1155630A1 true EP1155630A1 (en) 2001-11-21
    EP1155630B1 EP1155630B1 (en) 2004-11-03

    Family

    ID=8168747

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP00110470A Expired - Lifetime EP1155630B1 (en) 2000-05-17 2000-05-17 Articulated metallic bracelet

    Country Status (3)

    Country Link
    EP (1) EP1155630B1 (en)
    AT (1) ATE281089T1 (en)
    DE (1) DE60015505D1 (en)

    Cited By (2)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    JP2006304956A (en) * 2005-04-27 2006-11-09 Citizen Watch Co Ltd Metal band
    EP1967087A1 (en) * 2007-03-08 2008-09-10 Cendres et Métaux SA Connector pins for bracelets

    Citations (5)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US4160361A (en) * 1977-06-02 1979-07-10 Aurifex Limited Jewelry bracelets
    FR2717991A1 (en) * 1994-03-29 1995-10-06 Burdet Jean L Sa Assembly of chain of metal links in watch making or jewellery
    EP0749709A1 (en) * 1995-06-22 1996-12-27 Promotion Srl A connecting element for arm bands
    FR2743475A1 (en) * 1996-01-17 1997-07-18 Werthanor Sa Welding articulation spindles used to produce articulated links of e.g. bracelets for watches
    EP0842731A1 (en) * 1996-11-14 1998-05-20 Werthanor S.A. Method and apparatus for fixing a joint shaft, and with this method strap band composed of articulated links

    Patent Citations (5)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US4160361A (en) * 1977-06-02 1979-07-10 Aurifex Limited Jewelry bracelets
    FR2717991A1 (en) * 1994-03-29 1995-10-06 Burdet Jean L Sa Assembly of chain of metal links in watch making or jewellery
    EP0749709A1 (en) * 1995-06-22 1996-12-27 Promotion Srl A connecting element for arm bands
    FR2743475A1 (en) * 1996-01-17 1997-07-18 Werthanor Sa Welding articulation spindles used to produce articulated links of e.g. bracelets for watches
    EP0842731A1 (en) * 1996-11-14 1998-05-20 Werthanor S.A. Method and apparatus for fixing a joint shaft, and with this method strap band composed of articulated links

    Cited By (3)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    JP2006304956A (en) * 2005-04-27 2006-11-09 Citizen Watch Co Ltd Metal band
    EP1967087A1 (en) * 2007-03-08 2008-09-10 Cendres et Métaux SA Connector pins for bracelets
    EP1969959A1 (en) * 2007-03-08 2008-09-17 Cendres & Metaux SA Articulation pins for bracelets

    Also Published As

    Publication number Publication date
    DE60015505D1 (en) 2004-12-09
    ATE281089T1 (en) 2004-11-15
    EP1155630B1 (en) 2004-11-03

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