EP3607851B1 - Verfahren zum bilden eines crimp-futters auf einem nicht-leitenden substrat, und mit diesem verfahren erhaltenes objekt - Google Patents

Verfahren zum bilden eines crimp-futters auf einem nicht-leitenden substrat, und mit diesem verfahren erhaltenes objekt Download PDF

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Publication number
EP3607851B1
EP3607851B1 EP19188365.1A EP19188365A EP3607851B1 EP 3607851 B1 EP3607851 B1 EP 3607851B1 EP 19188365 A EP19188365 A EP 19188365A EP 3607851 B1 EP3607851 B1 EP 3607851B1
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EP
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Prior art keywords
substrate
girdle
wires
claws
setting
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EP19188365.1A
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English (en)
French (fr)
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EP3607851A1 (de
Inventor
Francis Cardot
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Centre Suisse dElectronique et Microtechnique SA CSEM
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Centre Suisse dElectronique et Microtechnique SA CSEM
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    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
    • A44C17/00—Gems or the like
    • A44C17/04—Setting gems in jewellery; Setting-tools
    • 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
    • G04B19/00—Indicating the time by visual means
    • G04B19/06—Dials
    • G04B19/10—Ornamental shape of the graduations or the surface of the dial; Attachment of the graduations to the dial
    • 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
    • G04B19/00—Indicating the time by visual means
    • G04B19/06—Dials
    • G04B19/18—Graduations on the crystal or glass, on the bezel, or on the rim
    • 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
    • G04B29/00—Frameworks
    • G04B29/02—Plates; Bridges; Cocks
    • 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
    • G04B29/00—Frameworks
    • G04B29/02—Plates; Bridges; Cocks
    • G04B29/027—Materials and manufacturing

Definitions

  • the invention relates to the use and setting of objects such as precious or semi-precious stones on substrates formed from non-ductile materials such as in particular glass, ceramic, hard machinable and / or photocurable polymers (epoxy , PEEK) or even monocrystalline or polycrystalline silicon.
  • non-ductile materials such as in particular glass, ceramic, hard machinable and / or photocurable polymers (epoxy , PEEK) or even monocrystalline or polycrystalline silicon.
  • the invention relates more particularly, according to a first object, to a method for producing crimping punches on substrates formed from non-ductile materials.
  • the invention also relates to a method for crimping an object such as a precious or semi-precious stone on a non-ductile substrate using a stick obtained according to the method of the invention.
  • the invention finally relates to a timepiece or jewelry piece comprising a non-ductile substrate provided with a crimping pin obtained according to the inventive process.
  • the invention will find particular applications in watchmaking and jewelry, in particular for the production of dials or other watch hands set with precious stones as well as with jewelry.
  • precious and semi-precious stones have always been used to adorn, dress and decorate pieces of all kinds such as rings, brooches, pendants, bracelets, boxes, dials etc. .. and thus give them a refined, luxurious and luminous aesthetic rendering, deliberately using the properties of reflection and light transmission of stones.
  • these precious stones are positioned and set on precious metal substrates (gold, silver, platinum, palladium), these metals exhibiting a ductility specific to their shaping by shaping and / or depositing and manual welding of the claws and crimping pins of each of the stones.
  • the applicant has for example proposed in the application EP 3291024 A1 a new type of monolithic display module providing a mysterious and animated display of great simplicity and compactness of construction, such a display module comprising display members movable relative to each other to form a said pattern by the intermediary of elastic deformable links of the flexible blade type.
  • These display modules are obtained by processes resulting from microtechnology and microelectronics, by deep etching processes of silicon wafers.
  • Such a display module has the advantage, through the fineness of its constituent elements, of the order of a few micrometers, of providing very diverse aesthetic effects depending on the shape of the mobile elements as well as the background colors of the dial with which they are associated with.
  • An object of the invention is especially to provide a technique for setting objects such as precious or semi-precious stones on non-ductile substrates such as silicon, ceramics or glass and timepieces or watches. jewelry comprising such substrates provided with set stones.
  • Another object of the invention is to provide timepiece or jewelry pieces comprising a non-ductile substrate and a crimping ring provided with metal claws integral with said substrate without resorting to gluing.
  • JP 3136526U describes a method according to the preamble of claim 1 and a timepiece or jewelry piece according to claim 16.
  • non-ductile substrate is understood to mean any material whose Young's modulus is greater than 2.3 GPa, also commonly referred to as a rigid material.
  • a non-ductile substrate within the meaning of the invention may in particular, but not exclusively, consist of silicon, monocrystalline or polycrystalline, of ceramic, or of glass.
  • the realization of the belt includes the formation of an orifice in the non-ductile substrate.
  • an orifice could be produced using various techniques depending on the nature of the substrate.
  • the production of the claws comprises the individual deposition of metal wires at the periphery of the belt according to a wire bossing process, called “stud bumping” in English.
  • the production of the claws comprises the simultaneous deposition of metal wires at the periphery of the belt by thermocompression on the surface of the substrate previously metallized from a support plate on which the wires have previously been formed.
  • thermocompression technique developed by the Applicant and described in the patent. EP 2579104 B1 .
  • This embodiment is related to techniques for manufacturing integrated circuits and other components in the field of microelectronics and microsystems, well known to those skilled in the art in these fields. These techniques will therefore not be detailed here.
  • the production of the claws can also consist in molding the metal wires at the periphery of the belt in suitable orifices arranged in a layer of photosensitive resin by photolithography and galvanic growth.
  • This alternative embodiment according to the method of the invention advantageously makes it possible to produce a plurality of châtons equipped with a base supporting the kitten's belt and claws, the whole forming an assembly formed from the material on a first substrate, then to separate the case. where appropriate, said base of said first substrate in order then to secure the strut on the non-ductile substrate of the final support. It is thus possible to produce very complex and original compositions of crimped objects on a non-ductile substrate, such as, for example, for dials of timepieces formed from ceramic or silicon as proposed in the patent application. EP 3291024 A1 on behalf of the Claimant.
  • the metal wires forming the claws of the kitten are preferably made of an alloy of gold and / or other precious metals such as in particular silver and / or palladium.
  • the metallization step preferably comprises the deposition of a thin layer of gold by a gas phase deposition process.
  • the invention also relates to a method for crimping an object onto a surface of a non-ductile substrate as defined above.
  • This crimping process comprises in a particular embodiment the steps defined in claim 14, or in an alternative the steps defined in claim 15.
  • a final object of the invention relates to a timepiece or piece of jewelry, comprising a non-ductile substrate and a crimping ring of an object arranged on a surface of said substrate, said ring comprising a belt forming a support seat of said object and a plurality of deformable metal claws distributed around the periphery of the belt and having a length such that at least one free end of each claw can be folded against the object once the latter is located in the belt, characterized in that that the crimping stick is formed on the non-ductile substrate according to one of the variants of the method for producing a crimping stick of the invention as defined above.
  • an orthonormal frame XYZ will be considered, each figure being a cross-sectional representation along a vertical plane YZ of a non-ductile substrate 2 on which a gold crimping block 1 is formed.
  • the figures 1a to 1f show a first method of forming a gold chaton 1 on a non-ductile substrate 2 formed from silicon.
  • This first method can be said to transfer threads or gold bands onto the substrate 2 to produce the claws 12 of the kitten 1 at the periphery of a belt 11 of said kitten 1 formed by an orifice 3 formed in the substrate 2, in particular by deep etching, as is well known in the field of microelectronics and microsystems (MEMS, NEMS, MOEMS, etc.).
  • a deposit of gold wires or bands 4 is firstly carried out on a support substrate 5 by photolithography and galvanic growth, according to techniques well known to the microtechnologist.
  • the receiving substrate 2 is prepared by making a metallic layer of gold 21 on one surface of the receiving substrate 2, for example by physical vapor deposition, followed by deep etching to form one or more orifices 3 intended to form the belt 11 of a crimping piece 1.
  • the diameter of the orifices 3 is chosen such that it is less than the largest dimension of the girdle of a diamond O to be crimped, said diamond O thus being able to be positioned in a stable manner on its cylinder head on the rim of orifice 3, as will be seen more particularly from figures1f and 1g later.
  • the number of claws 12 of the châton 1 depends on the size of the diamond O (or other set object), on its shape and on the desired rendering for the final piece bearing the substrate and the set diamond.
  • the receiver substrate 2 is prepared in a first step as in the first variant by producing a metallic layer of gold 21 on a surface of the receiver substrate 2, for example by chemical vapor deposition. , followed by a deep etching to form one or more orifices 3 intended to form the belt 11 of a crimping piece 1.
  • the diameter of the orifices 3 is chosen such that it is less than the largest dimension of the girdle of a diamond O to be crimped.
  • the orifices 3 are filled with sacrificial material 22 so as to produce a mixed substrate 2 of homogeneous thickness, on which a layer of photosensitive resin 23 is deposited ( fig.
  • FIG. 1 Another variant embodiment of a crimping tool 1 on a non-ductile silicon substrate 2 is proposed to figures 2a to 2d .
  • the receiver substrate 2 is prepared in a first step as in the first variant by producing a metallic layer of gold 21 on a surface of the receiver substrate 2, for example by physical vapor deposition, followed by 'a deep engraving to form one or more orifices 3 intended to form a belt 11 of a crimping piece 1.
  • the diameter of the orifices 3 is chosen such that it is less than the largest dimension of the girdle of a diamond O to be crimped, said diamond O thus being able to be positioned in a stable manner on its cylinder head on the rim of port 3.
  • the claws 12 of the kitten 1 are then made ( fig. 2b ) directly on the metallized surface 21 of the substrate 2 by a technique known as "wire boss", more commonly known under the English name of "stud bumping".
  • wire boss more commonly known under the English name of "stud bumping”.
  • gold threads 4 are directly deposited in exact positions around the orifice 3 forming the belt 11 of the kitten 1, the diameter of the claws at their embossed anchoring base (bump in English) being able to be between 30 and 150 microns, for heights of wires 4, therefore claws 12 of 0.5 to several millimeters, at very high deposition rates, of the order of 10 to 20 wires deposited per second as a minimum.
  • This process therefore allows a very high yield of formation of châtons 1 in situ on a silicon substrate 2, according to various configurations and adapted to the desired final aesthetic results as a function of the arrangement of the elements (diamonds D) to be crimped.
  • a gold washer is produced first forming a base 13 of the socket 1 on a support plate 5, for example made of silicon, optionally covered with a sacrificial material (not shown) such as a layer of copper, by photolithography and galvanic growth ( fig. 3a ).
  • This washer 13 preferably has a central orifice 14 in its geometric center, adapted to subsequently allow the centering of a diamond O by aligning its culet in said orifice 14.
  • a first plurality of gold threads 111 deposit by the technique of "stud bumping" previously described in relation to the figure 2 , a first plurality of gold threads 111, said threads 111 having a height h1 and being distributed uniformly at a distance d1 from the geometric center of the base 13.
  • This first plurality of threads 111 is intended to form the belt 11 of the kitten 1.
  • a second plurality of metal wires 121 is also deposited by “stud bumping”, these second wires 121 having a height h2 greater than the height h1 of the wires of the first plurality of wires 111 and being distributed uniformly at a distance d2 from the geometric center of the base 13, the distance d2 being greater than the distance d1.
  • These second threads 121 are thus intended to form the claws strictly speaking of the kitten 1.
  • a diamond O is then crimped directly on the support plate 5. For this, the latter is pressed onto its yoke between the first wires 111, the culet of the diamond being centered in the central orifice 14 of the base. Under the applied pressure, the wires 111 are deformed and form a base for stabilizing the diamond O, and therefore the belt 11 of the chain 1. Then we crimp by folding the ends of the second wires 121 forming the claws 12 on the crown of the diamond. O, as in all other embodiments ( fig. 3d ).
  • This embodiment has the advantage of providing an indirect embodiment of a crimping pin 1. It is thus possible to envisage making complete plates of châtons 1, on which are set as many diamonds as necessary, then detaching each châton and its diamond in order to assemble them one by one on a suitable receiving substrate 2, according to the desired arrangement. It is also conceivable to detach the châtons 1 once formed on the support plate 5 in order to fix them by their base 13 on a receiving substrate 2 before crimping diamonds D or other objects to be crimped therein.
  • the method of the invention thus advantageously provides a method of manufacturing châtons 1 crimping, with high efficiency, and providing great versatility in the creation of objects such as pieces of jewelry or timepiece combining technical non-ductile substrates.
  • objects such as silicon or ceramic, with precious metals such as gold and precious and semi-precious stones, such as diamonds, rubies, emeralds, sapphires and others.
  • a stabilizing element such as a temporary glue, in particular on an aqueous base for example, which once the claws are folded back to form the seam can be easily dissolved.

Claims (16)

  1. Verfahren zur Herstellung eines Steinfutters (1) zur Einfassung eines Objekts (O) auf einer Oberfläche eines nicht-duktilen Substrats (2), wobei das Steinfutter (1) einen Gürtel (11) aufweist, der einen Sitz zum Stützen eines derartigen Objekts (O) bildet, und eine Mehrzahl von verformbaren Klauen (12), die am Umfang des Gürtels (11) verteilt sind und eine Länge aufweisen, so dass wenigstens ein freies Ende jeder Klaue (12) gegen das Objekt (O) gebogen werden kann, sobald dieses im Gürtel (11) sitzt, dadurch gekennzeichnet, dass es die folgenden Schritte aufweist:
    - Metallisieren wenigstens eines Teilbereichs der Oberfläche des Substrats (2), auf der das Steinfutter (1) gebildet werden soll;
    - Herfstellen des Gürtels (11, 111) des Steinfutters im Oberflächen-Teilbereich des Substrats (2), der zuvor metallisiert wurde;
    - Herstellen der Klauen (12) durch Aufbringung der Metalldrähte (4, 111, 121) auf dem Oberflächen-Teilbereich des Substrats, der zuvor metallisiert wurde, am Umfang des Gürtels (11).
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass das Herstellen des Gürtels (11) das Bilden einer Öffnung (3) im nicht-duktilen Substrat (2) aufweist.
  3. Verfahren nach Anspruch 2, dadurch gekennzeichnet, dass das Herstellen der Klauen (12) das einzelne Aufbringen von Metalldrähten (4) am Umfang des Gürtels (11) nach einem Draht-Bumping-Verfahren aufweist, das auf Englisch als "Stud Bumping" bezeichnet wird.
  4. Verfahren nach Anspruch 2, dadurch gekennzeichnet, dass das Herstellen der Klauen (12) das gleichzeitige Aufbringen von Metalldrähten (4) am Umfang des Gürtels (11) durch Thermokompression auf der zuvor metallisierten Oberfläche ausgehend von einer Trägerplatte (5) aufweist, auf der die Drähte (4) zuvor gebildet wurden.
  5. Verfahren nach Anspruch 4, dadurch gekennzeichnet, dass es einen Schritt des Wiederaufrichtens der aufgebrachten Metalldrähte (4) bezogen auf die Oberfläche des Substrats (2) aufweist.
  6. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Herstellen der Klauen die folgenden Schritte aufweist:
    - Bilden einer Durchgangsöffnung (3) im nicht-duktilen Substrat (2), wobei eine derartige Öffnung den Gürtel (11) des Steinfutters bildet;
    - Auffüllen der Öffnung (3) mit einem Opfermaterial (22) ;
    - Bilden der Klauen (12) durch Photolithographie und galvanisches Aufwachsen am Umfang der Öffnung (3), die den Gürtel des Steinfutters bildet;
    - Entfernen des Opfermaterials (22) aus den Öffnungen im Trocken- oder Nassverfahren.
  7. Verfahren nach Anspruch 6, dadurch gekennzeichnet, dass es einen Schritt des Wiederaufrichtens der Metalldrähte (4), die zur Bildung der Klauen (12) aufgebracht wurden, bezogen auf die Oberfläche des Substrats (2) nach dem Entfernen des Opfermaterials (22) aufweist.
  8. Verfahren nach Anspruch 2, dadurch gekennzeichnet, dass das Herstellen der Klauen (12) darin besteht, die Metalldrähte (4) durch Photolithographie und galvanisches Aufwachsen am Umfang des Gürtels (11) in geeignete Öffnungen zu formen, die in einer Schicht aus lichtempfindlichem Harz (23) angeordnet sind.
  9. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Herstellungsschritte des Gürtels und der Klauen gleichzeitig ausgeführt werden und die folgenden Schritte aufweisen:
    - Bilden einer metallischen Grundlage (13) auf einem Träger (5) durch Photolithographie und galvanisches Aufwachsen, wobei die Grundlage (13) einen geometrischen Mittelpunkt aufweist;
    - Aufbringen einer ersten Mehrzahl von Metalldrähten (111) auf einer oberen Oberfläche der Grundlage (13) durch ein Draht-Bumping-Verfahren, das auf Englisch als "Stud Bumping" bezeichnet wird, wobei die Drähte (111) eine Höhe h1 aufweisen und gleichmäßig mit einem Abstand d1 vom geometrischen Mittelpunkt der Grundlage (13) verteilt sind und den Gürtel (11) bilden;
    - Aufbringen einer zweiten Mehrzahl von Metalldrähten (121) auf einer oberen Oberfläche der Grundlage (13) durch ein Draht-Bumping-Verfahren, das auf Englisch als "Stud Bumping" bezeichnet wird, wobei die Drähte (121) der zweiten Mehrzahl eine Höhe h2 aufweisen, die größer als die Höhe h1 der Drähte (111) der ersten Mehrzahl von Drähten ist, und gleichmäßig mit einem Abstand d2 vom geometrischen Mittelpunkt der Grundlage verteilt sind, wobei der Abstand d2 größer als der Abstand d1 ist und die Drähte (121) der zweiten Mehrzahl von Drähten die Klauen (12) bilden;
    - Trennen der metallischen Grundlage (13) vom Träger, und
    - Befestigen der Grundlage (13) auf der zuvor metallisierten Oberfläche des Substrats (2).
  10. Verfahren nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass die Metalldrähte (4), die die Klauen (12) des Steinfutters bilden, aus Gold gebildet sind.
  11. Verfahren nach Anspruch 9, dadurch gekennzeichnet, dass die metallische Grundlage und die Metalldrähte (4) der ersten und zweiten Mehrzahl von Drähten (111, 121) aus Gold gebildet sind.
  12. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das nicht-duktile Substrat (2) aus kristallinem oder polykristallinem Silizium gebildet ist.
  13. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Schritt des Metallisierens das Aufbringen einer dünnen Goldschicht (21) durch ein Gasphasen-Abscheidungsverfahren aufweist.
  14. Verfahren zur Einfassung eines Objekts (O) auf einer Oberfläche eines nicht-duktilen Substrats (2), dadurch gekennzeichnet, dass es die folgenden Schritte aufweist:
    - Herstellen eines Einfassungs-Steinfutters (1) auf der Oberfläche des Substrats nach dem Verfahren nach einem der Ansprüche 1 bis 8 oder 10 oder einem der Ansprüche 12 oder 13 in Abhängigkeit von einem der Ansprüche 1 bis 8 oder 10;
    - Stabiles Festkeilen des Objekts (O) auf dem Gürtel (11) und
    - Biegen der freien Enden der Klauen (12) gegen eine obere Oberfläche des Objekts (O), um dieses in Anlage an den Gürtel (11) zu halten.
  15. Verfahren zur Einfassung eines Objekts (O) auf einer Oberfläche eines nicht-duktilen Substrats (2), dadurch gekennzeichnet, dass es die folgenden Schritte aufweist:
    - Herstellen eines Einfassungs-Steinfutters (1) auf der Oberfläche des Substrats (2) nach dem Verfahren nach Anspruch 9 oder 11 oder einem der Ansprüche 12 oder 13 in Abhängigkeit von einem der Ansprüche 9 oder 11;
    - Stabiles Positionieren des Objekts (O) auf dem freien Ende der Metalldrähte (111) der ersten Mehrzahl von Drähten,
    - Eindrücken des Objekts in einer Richtung senkrecht zur Grundlage (13), um die Metalldrähte (111) der ersten Mehrzahl von Drähten zu verformen und so den Gürtel (11) unter dem Objekt (O) zu bilden;
    - Biegen der freien Enden der Klauen (12), die aus den Drähten (121) der zweiten Mehrzahl von Drähten gebildet sind, gegen eine obere Oberfläche des Objekts (O), um dieses in Anlage an den Gürtel zu halten.
  16. Uhr oder Schmuckstück aufweisend ein nicht-duktiles Substrat (2) und ein Steinfutter (1) zur Einfassung eines Objekts (O), das auf einer Oberfläche des Substrats angeordnet ist, wobei das Steinfutter (1) einen Gürtel (11) aufweist, der einen Sitz zum Stützen des Objekts (O) bildet, und eine Mehrzahl von verformbaren Klauen (12), die am Umfang des Gürtels (11) verteilt sind und eine Länge aufweisen, so dass wenigstens ein freies Ende jeder Klaue gegen das Objekt gebogen sein kann, sobald dieses im Gürtel sitzt, dadurch gekennzeichnet, dass das Einfassungs-Steinfutter (1) nach dem Verfahren nach einem der Ansprüche 1 bis 13 auf dem nicht-duktilen Substrat (2) gebildet ist.
EP19188365.1A 2018-08-08 2019-07-25 Verfahren zum bilden eines crimp-futters auf einem nicht-leitenden substrat, und mit diesem verfahren erhaltenes objekt Active EP3607851B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH00970/18A CH715238A1 (fr) 2018-08-08 2018-08-08 Procédé de formation d’un châton de sertissage sur un substrat non-ductile et objet obtenu selon ce procédé.

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EP3607851A1 EP3607851A1 (de) 2020-02-12
EP3607851B1 true EP3607851B1 (de) 2021-03-31

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EP19188365.1A Active EP3607851B1 (de) 2018-08-08 2019-07-25 Verfahren zum bilden eines crimp-futters auf einem nicht-leitenden substrat, und mit diesem verfahren erhaltenes objekt

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Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3544429A1 (de) * 1985-12-16 1987-06-19 Juwedor Gmbh Verfahren zur galvanoplastischen herstellung von schmuckwaren
JP3136526U (ja) * 2007-07-27 2007-11-01 株式会社 フォー・クリエイターズ 宝石類保持構造体、時計バンドおよび腕時計ならびに装身具
JP2009247484A (ja) * 2008-04-03 2009-10-29 Angelly Japan:Kk 宝石埋込人工爪およびその製造方法
EP2579104B1 (de) * 2011-10-07 2014-06-25 CSEM Centre Suisse d'Electronique et de Microtechnique SA - Recherche et Développement Herstellungsverfahren eines Verbunduhrwerks
EP2796297B1 (de) * 2013-04-26 2019-01-02 Omega SA Dekorteil, das durch Bördelung auf amorphem Metall erstellt wird
CH712875B1 (fr) 2016-09-05 2022-10-31 Csem Centre Suisse Delectronique Et De Microtechique Sa Rech Et Developpement Module d'affichage comportant des éléments mobiles autour de liaisons déformables, système d'affichage associé et pièce d'horlogerie comportant un tel système d'affichage.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
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CH715238A1 (fr) 2020-02-14

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