EP1969959A1 - Gelenkstifte für Armbänder - Google Patents

Gelenkstifte für Armbänder Download PDF

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Publication number
EP1969959A1
EP1969959A1 EP07405075A EP07405075A EP1969959A1 EP 1969959 A1 EP1969959 A1 EP 1969959A1 EP 07405075 A EP07405075 A EP 07405075A EP 07405075 A EP07405075 A EP 07405075A EP 1969959 A1 EP1969959 A1 EP 1969959A1
Authority
EP
European Patent Office
Prior art keywords
sheet
hinge
solder material
welding
stamped
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.)
Withdrawn
Application number
EP07405075A
Other languages
English (en)
French (fr)
Inventor
Alfred Lei
Jamil Kündig
Jean-Marc Guenat
Robert Tschantré
Martin Künzi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cendres and Metaux SA
Original Assignee
Cendres and Metaux SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Cendres and Metaux SA filed Critical Cendres and Metaux SA
Priority to EP07405075A priority Critical patent/EP1969959A1/de
Priority to EP08152200A priority patent/EP1967087A1/de
Publication of EP1969959A1 publication Critical patent/EP1969959A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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

Definitions

  • the invention relates to hinge pins for bracelets, in particular watch bracelets or bracelets for jewelery.
  • the invention also relates to a method of manufacturing hinge pins and a method of manufacturing a bracelet with articulated links.
  • Some bracelets are constituted of links articulated together by hinge pins, the hinge pins being welded at their ends to outer links.
  • fixing the hinge pin on a watch link element is achieved by welding the ends of the hinge pin in the bottom of the blind hole of the link.
  • the ends of the hinge pins each comprise a smaller diameter portion on which is deposited a weld washer, then assembles the bracelet by introducing the hinge pins in the bottom of the blind holes of the links.
  • the hinge pins are then welded to the links by introducing the bracelet thus mounted in an oven in which the solder washers are melted.
  • the welding of the ends of the hinge pin in blind holes of the outer links has an aesthetic value since this method allows to completely hide the joint.
  • a disadvantage is that the operation of setting the solder washers on the ends of the hinge pins is long and delicate, especially because of the small dimensions of the parts. The risk that the welding washers fall during the various manipulations of the hinge pins before assembly is not negligible. In addition, it is difficult to effectively control the presence of the solder washers at the end of the hinge pins before assembly. However, the lack of welding at one end of the hinge axis could lead to a risk of total or partial disassembly of the link elements.
  • a device for fixing a metal hinge pin by welding in a hole in a metal element where the welding is carried out by melting a quantity of solder between the hinge pin and a wall of the hole after the introduction of the hinge pin into the hole.
  • the hinge axis comprises an inner recess opening outwardly of the hinge axis and the weld extends at least partially in the recess.
  • the main object of the invention is to propose a hinge pin intended to be welded to a bracelet link, which is easy to handle and which can be assembled at the link of a bracelet in a reliable and economical way.
  • the invention also relates to a reliable and economical manufacturing method of such a hinge axis.
  • the invention also provides a reliable and economical manufacturing method of a bracelet comprising links and hinge pins.
  • hinge pins for jewelery or watch bracelets that simplify and reduce manual operations in the assembly of hinge pins to the links.
  • Objects of the invention are made by a welding hinge pin according to claim 1, and a method of manufacturing a hinge pin according to claim 8.
  • the hinge axis of welding comprises an axis with a central hinge portion, adapted to be pivotally mounted in a cavity of a link, and at least one attachment portion s' extending from one end of the hinge portion, and a solder material disposed on the attachment portion for welding the attachment portion into a blind housing of a link, characterized in that the solder material is under the shape of a sheet pressed around the fastening portion and fixed rigidly thereto.
  • the cutting and stamping of the sheet of solder material is carried out simultaneously by stamping a sheet of solder material with the end of the hinge pin in a stamping die having a cavity and a cutting tool consisting of a cutting blade concentrically placed in the cavity.
  • the sheet of solder material is first cut with a cutting tool and then stamped around the end of the hinge pin in a die. stamping.
  • cutting and stamping are performed in a single step using a single die for cutting and stamping.
  • the sheet of solder material is placed on the die cutting and stamping die which has a cavity and a groove concentric with the cavity.
  • the cutting tool is pressed into the bottom of the groove to cut a solder disc.
  • the solder disc is then stamped with the end of the hinge pin.
  • a cutting tool for example of cylindrical shape, with a cutting edge has a concentric stamping punch and smaller diameter, set back from the cutting edge.
  • the sheet of solder material is first cut and stamped into a first die having a cavity and a cutting groove concentric with the cavity, resulting in a solder piece having the shape of a capsule.
  • the welding capsule is then placed on a second stamping die having a cavity and pressed a second time by the end of the hinge pin so as to be fixed thereto.
  • These axes of articulation can be used in a method of manufacturing a bracelet in which the hinge axis is fixed in a blind hole formed in external link elements of an articulated bracelet of a watch or jewelery.
  • the hinge pins can be introduced into the hole of the links and welded by fusion of the welding material attached to the end of the hinge axis.
  • hinge pins makes it possible to avoid any operation of feeding, setting up and handling the weld between the end of the hinge pin and the wall of the hole. and ensures the presence of the appropriate amount of weld on each of the hinge pins and thereby obtain a greater ease, accuracy and reliability of welding.
  • hinge pins can be used favorably for the attachment by welding of a hinge pin in holes provided in external link elements of an articulated wristwatch or jewelry.
  • the figure 1 represents a portion 1 of articulated link bracelet comprising central links 2, external links 3 and hinge pins 4.
  • the hinge pins are inserted in passages 5 provided for this purpose in the central link elements pivotally and, secondly, fixed at their ends 6 in blind holes 7 provided in the outer link members.
  • the hinge axis comprises a central portion 9 of cylindrical shape and fastening portions 10 extending opposite ends of the central portion and forming the ends of the hinge pin.
  • the attachment portions have a width L smaller than the diameter D of the central portion.
  • the hinge pin further comprises a piece 11 of a sheet of solder material fixed to the attachment portion. The piece of welding material is applied to the ends of the hinge pin by a method of cutting and stamping.
  • the central part of the hinge pin may have a length of about 12 mm and a diameter of about 1.2 mm and the attachment parts a length of about 4 mm and a diameter of about 0.8 mm respectively.
  • the thickness of the sheet of solder material is for example between 0.05 and 0.2 mm.
  • the ends of the hinge axis that is to say the fastening portions comprising the welding material, are introduced into the blind holes 7 and the assembly, or at least the external link, is heated in order to Melt the solder material and fix the hinge pin rigidly to the outer links.
  • the sheet of solder material may be made of a noble metal or an alloy comprising none or at least one noble metal.
  • a preferred alloy composition contains at least 75% fine gold, the rest which may include precious metals such as Ag, Pd, Pt and / or base metals (Cu, Zn, ).
  • the cutting and stamping steps of the sheet of solder material are performed simultaneously.
  • Such a process is schematically shown in the figure 2 .
  • a sheet of welding material 16 is disposed between a stamping die 12 and one of the ends 6 of the hinge pin 4.
  • the stamping die has a cavity 13, matching the final shape of the piece 11 of sheet of the welding material stamped on the fastening portion 10.
  • the cavity inlet has a chamfer or a spoke 14 to prevent tearing of the sheet of solder material during stamping.
  • a cutting tool 15 comprises a cutting blade placed on the surface of the stamping die, concentric with the cavity 13.
  • the end of the hinge pin 6 is pressed against the sheet 16 of plastic welding material plastically deforming the latter by pressing it towards the bottom of the cavity 13.
  • the sheet is cut by the cutting blade 15.
  • the diameter of the cutting blade makes it possible to cut a workpiece in the form of a disk of sufficient diameter to be able to cover the whole of the fastening portion 10 at the end of the spindle. joint.
  • the pressure applied between the hinge pin and the bottom of the cavity 13 makes it possible to permanently fix the piece of welding material on the fixing part.
  • the cutting tool 317 for example of cylindrical shape, having a cutting edge 318 is pressed against the sheet of solder material 16 placed on a cutting die (not shown) in order to cut a disk 20 of sufficiently large diameter. to cover all or part of the surface of the attachment portion 10 at the end of the hinge pin during the subsequent stamping operation.
  • the disk 20 of solder material is then placed in a housing 322 formed in the stamping die 312.
  • the die also comprises a cavity 313.
  • stamping device arranged concentrically with the housing.
  • the shape of the cavity matches the final shape of the piece of welded material sheet stamped on the attachment portion 10 and conically grows 324 to the housing 322.
  • the end 6 of the hinge pin is pressed on the solder disc 20 to stamp it at the bottom of the cavity 313.
  • the cutting and stamping steps described in the previous method are performed in a single step using a single die for cutting and stamping.
  • the sheet of solder material 16 is placed on the die-cut die 412 having a cavity 413 with a conically-shaped inlet 424 and a groove concentric with the cavity.
  • the cutting tool for example cylindrical, having a cutting edge 418 is pressed into the bottom of the groove of the same diameter to cut a disc of solder material.
  • the disc of solder material is then stamped with the end 6 of the hinge pin.
  • a cutting tool 517 for example of cylindrical shape, with a cutting edge 518 comprises a stamping punch 32 at its center, set back with respect to the cutting edge.
  • a first cutting and drawing die 512 comprises a cavity 34, matching the shape of the punch 32 plus the thickness of the sheet of material to be welded, and a groove 35 of the same diameter as the cutting edge of the cutting tool. and concentric with the cavity 34.
  • the sheet 16 of solder material, placed on the die, is cut and stamped simultaneously by the cutting tool and the resultant punch into a solder piece having the shape of a capsule 36.
  • the piece 711 of solder material sheet may be applied only around the periphery of the attachment portion 10 but not on its end 6 ( figure 7 ).
  • solder material sheet piece 811, 811 ' can be applied only to the end of the hinge pin ( figures8a, 8b ).
  • a conically shaped cavity 44 may be pierced at the end of the hinge axis ( figure 8a ) or a circular groove 46 can be formed by turning at the end of the hinge axis ( figure 8b ).
  • the solder material enters the cavity or groove promoting adhesion of the sheet of solder material to the end of the hinge axis.
  • the fixing part of the hinge pin may be of non-circular section, for example square 910, as illustrated in the variant of FIG. Figures 9a, 9b , with a width L less than the diameter D of the piece of pressed welding material 911.

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  • Adornments (AREA)
EP07405075A 2007-03-08 2007-03-08 Gelenkstifte für Armbänder Withdrawn EP1969959A1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP07405075A EP1969959A1 (de) 2007-03-08 2007-03-08 Gelenkstifte für Armbänder
EP08152200A EP1967087A1 (de) 2007-03-08 2008-03-03 Gliedstifte für Armbänder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07405075A EP1969959A1 (de) 2007-03-08 2007-03-08 Gelenkstifte für Armbänder

Publications (1)

Publication Number Publication Date
EP1969959A1 true EP1969959A1 (de) 2008-09-17

Family

ID=38480587

Family Applications (2)

Application Number Title Priority Date Filing Date
EP07405075A Withdrawn EP1969959A1 (de) 2007-03-08 2007-03-08 Gelenkstifte für Armbänder
EP08152200A Withdrawn EP1967087A1 (de) 2007-03-08 2008-03-03 Gliedstifte für Armbänder

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP08152200A Withdrawn EP1967087A1 (de) 2007-03-08 2008-03-03 Gliedstifte für Armbänder

Country Status (1)

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EP (2) EP1969959A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2803286B1 (de) * 2013-05-17 2017-11-15 Comadur S.A. Montagesystem von mindestens drei Teilen
EP3653074B1 (de) 2018-11-13 2022-02-16 Comadur S.A. Zusammenbau von elementen, wie die kettenglieder eines armbands

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH220804A (fr) * 1941-04-23 1942-04-30 Nouvelle Zesar S A Procédé de fabrication d'objets comportant une tige et une embase, tels que boulons, vis, etc.
FR2743475A1 (fr) * 1996-01-17 1997-07-18 Werthanor Sa Procede de soudage d'axes d'articulation sur des elements destines a former des maillons articules d'un bracelet
EP0842731A1 (de) * 1996-11-14 1998-05-20 Werthanor S.A. Verfahren und Vorrichtung zum Fixieren einer Gelenkstange, mit diesem Verfahren hergestelltes mehrgliedriges Armband
EP1023964A1 (de) * 1999-01-29 2000-08-02 Werthanor S.A. Verfahren und Vorrichtung zum Fixieren einer Gelenkstange, mit dieser Vorrichtung hergestelltes mehrgliedriges Armband
EP1155630A1 (de) * 2000-05-17 2001-11-21 Promotion Spa Metallisches Gliederarmband

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH220804A (fr) * 1941-04-23 1942-04-30 Nouvelle Zesar S A Procédé de fabrication d'objets comportant une tige et une embase, tels que boulons, vis, etc.
FR2743475A1 (fr) * 1996-01-17 1997-07-18 Werthanor Sa Procede de soudage d'axes d'articulation sur des elements destines a former des maillons articules d'un bracelet
EP0842731A1 (de) * 1996-11-14 1998-05-20 Werthanor S.A. Verfahren und Vorrichtung zum Fixieren einer Gelenkstange, mit diesem Verfahren hergestelltes mehrgliedriges Armband
EP1023964A1 (de) * 1999-01-29 2000-08-02 Werthanor S.A. Verfahren und Vorrichtung zum Fixieren einer Gelenkstange, mit dieser Vorrichtung hergestelltes mehrgliedriges Armband
EP1155630A1 (de) * 2000-05-17 2001-11-21 Promotion Spa Metallisches Gliederarmband

Also Published As

Publication number Publication date
EP1967087A1 (de) 2008-09-10

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