EP2400354A1 - Zifferblattfuß einer Uhr - Google Patents

Zifferblattfuß einer Uhr Download PDF

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Publication number
EP2400354A1
EP2400354A1 EP10166916A EP10166916A EP2400354A1 EP 2400354 A1 EP2400354 A1 EP 2400354A1 EP 10166916 A EP10166916 A EP 10166916A EP 10166916 A EP10166916 A EP 10166916A EP 2400354 A1 EP2400354 A1 EP 2400354A1
Authority
EP
European Patent Office
Prior art keywords
dial
foot
feet
recess
fixed
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Withdrawn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
EP10166916A
Other languages
English (en)
French (fr)
Inventor
Yves Winkler
Frédéric Jeanrenaud
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.)
Swatch Group Research and Development SA
Original Assignee
Swatch Group Research and Development 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 Swatch Group Research and Development SA filed Critical Swatch Group Research and Development SA
Priority to EP10166916A priority Critical patent/EP2400354A1/de
Priority to PCT/EP2011/060285 priority patent/WO2011161080A1/fr
Priority to EP11726429.1A priority patent/EP2585880A1/de
Priority to US13/704,075 priority patent/US20130148484A1/en
Priority to JP2013515849A priority patent/JP5457608B2/ja
Priority to CN2011800310394A priority patent/CN103038713A/zh
Publication of EP2400354A1 publication Critical patent/EP2400354A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • G04B19/12—Selection of materials for dials or graduations markings
    • 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
    • G04B19/14—Fastening the dials to the clock or watch plates

Definitions

  • the present invention relates to a timepiece dial foot, said one foot being fixed on said dial and used to fix said dial to the timepiece.
  • the technical field of the invention is the technical field of fine mechanics.
  • timepieces comprise a housing on which is fixed a dial.
  • This dial comprises feet which are used, on the one hand, as a geometrical reference in the manufacturing cycle of the dial and, on the other hand, to fix said dial to the case.
  • feet are made of crystalline metal such as steel, brass or gold. These feet are assembled by spot welding. They very often have a smaller diameter in the area in contact with the base of the dial, this for three main reasons. First, it prevents a weld overflow from properly squeezing the dial against movement. Second, it ensures, in case of impact on the foot, the plastic deformation is located in this narrowed area. The foot can then be straightened while maintaining good accuracy on the large diameter area that will adjust to the movement. Finally, this diameter of the smaller foot in the area in contact with the base of the dial serves to prevent deformation of the base of the dial in case of impact on a foot by a deliberate and controlled weakening of said foot.
  • each material is characterized by its Young's modulus E also called modulus of elasticity (generally expressed in GPa), characterizing its resistance to deformation.
  • Each material is also characterized by its elastic limit ⁇ e (generally expressed in GPa) which represents the stress beyond which the material deforms plastically. It is then possible, for given dimensions, to compare the materials by establishing for each the ratio of their elastic limit on their Young's modulus ⁇ e / E, said ratio being representative of the elastic deformation of each material. Thus, the higher the ratio, the greater the elastic deformation of the material.
  • the Young's modulus E is equal to 130 GPa and the elastic limit ⁇ e is equal to 1 GPa, which gives a ratio ⁇ e / E of the order of 0.007 i.e. low.
  • the deformation applied to the feet is too high, the resulting stress may exceed the elastic limit of the alloy and therefore cause permanent plastic deformation. Since they are often used as a geometric reference in the dial manufacturing cycle, it is necessary to unfold them for repositioning. A rupture of said foot can then occur if the stress is too high or by fatigue if the constraints are successive.
  • the object of the invention is to overcome the drawbacks of the prior art by proposing to provide a metal dial foot which is more resistant to shocks.
  • the invention relates to the dial foot cited above which is characterized in that it is made of at least partially amorphous material and comprising at least one metal element.
  • a first advantage of the present invention is to allow the dial feet to better withstand shocks. Indeed, amorphous metals have more interesting elastic characteristics.
  • the elastic limit ⁇ e is increased, which makes it possible to increase the ratio ⁇ e / E so that the material sees the stress beyond which it does not return to its initial shape to increase. If the foot deforms plastically more difficult, it is no longer necessary to unfold the foot to return it to its original position. If the foot is more resistant, it is also less weakened by successive folds and unfoldings and thus the foot has a longer life.
  • Another advantage of the present invention is to make it possible to produce feet of smaller dimensions. Indeed, as the amorphous metal is able to withstand higher stresses before deforming plastically, it is possible to make dial feet of smaller dimensions without losing resistance.
  • the amorphous metal is very easy to shape and allows the manufacture of complicated shapes with greater precision. This is due to the particular characteristics of the amorphous metal which can soften while remaining amorphous for a certain time in a given temperature range [Tg - T x ] of each alloy. It is thus possible to shape it under a relatively low stress and at a low temperature then allowing the use of a simplified process such as hot forming, while reproducing very precisely fine geometries because the viscosity of the alloy decreases significantly as a function of temperature in said temperature range [T g - T x ]. Therefore, it becomes possible to realize the dial and feet in one piece and accurately.
  • a timepiece 1 comprising a housing 2.
  • this housing 2 is arranged, as visible in the figure 2 a movement 5 on which is fixed a dial 7.
  • This dial 7 is fixed to the movement 5 by means of feet 9 fixed to said dial 7 and engaged in the orifices 11 of the movement 5.
  • the fixing of the dial 7 to the movement 5 is
  • This fixing means 13 consist for example of a screw 15 engaged in a threaded hole transverse to the orifice 11 and opening therein. This screw then clamps said foot 9 so as to hold it fixed in the orifice 11.
  • the dial 7 is attached to a support 17 on which the feet 9 are fixed as is the case for a dial 7 enamel glued to a support 17 made of brass.
  • the feet 9 are made of an amorphous material or at least partially amorphous.
  • a material comprising at least one metal element is used.
  • the material will be an amorphous metal alloy. It will be understood by at least partially amorphous material that the material is capable of solidifying at least partially in amorphous phase, that is to say that it is able to lose at least locally all its crystalline structure.
  • the advantage of these amorphous metal alloys comes from the fact that, during their manufacture, the atoms of these amorphous materials do not arrange according to a particular structure as is the case for crystalline materials.
  • the elastic limit ⁇ e is different.
  • An amorphous metal is thus differentiated by an elastic limit ⁇ e higher than that of the crystalline metal by a factor of about two to three. This allows the amorphous metals to be able to undergo a greater stress before reaching the elastic limit ⁇ e .
  • Amorphous metals plastically deform more difficultly and break brittle when the applied stress exceeds the elastic limit.
  • the metal element of said material may then comprise gold, platinum, palladium, rhenium, ruthenium, rhodium, silver, iridium or osmium.
  • Such feet 9 have the advantage of having higher strength and longevity compared to their crystalline metal counterparts.
  • a foot 9 of amorphous metal has a better resistance to the stresses applied to it during a shock because it will deform elastically over a wider stress interval and return to its initial position once the shock is over.
  • this stress interval in which the foot 9 is deformed elastically, is wider for a foot 9 of amorphous metal than for its equivalent in crystalline metal, it allows said foot 9 of amorphous metal to withstand stresses that would plastically deform said foot 9 in crystalline metal.
  • these feet 9 are no longer unfolded to return them to their original position and therefore they become weaker, which improves their longevity.
  • the fact of decreasing the size of the feet 9 increases the risk of deformation of the dial 7, especially if the foot 9 has a smaller diameter in the area in contact 10, 12 with the base of the dial 7 or the support 17.
  • the foot 9 has an even smaller diameter in the contiguous zone 14 to the contact zone 10, 12 as visible in FIG. figure 9 . This makes it possible to dissociate the functions.
  • the contact zone 10, 12 is used to prevent the overflow of the weld prevents the dial 7 from being correctly pressed onto the movement 5.
  • the zone 14 is used to weaken the foot 9 so that it deforms, elastically or plastically, at this zone 14.
  • a casting process is used. This process involves casting the alloy obtained by melting the metal elements in a mold having the shape of the final piece. Once the mold filled, it is cooled rapidly to a temperature below Tg to prevent crystallization of the alloy and thus obtain a foot 9 of amorphous or partially amorphous metal.
  • Tg temperature below Tg
  • the advantage of casting an amorphous metal with respect to the casting of a crystalline metal is to be more precise.
  • the solidification shrinkage, for an amorphous metal is very low, less than 1% relative to that of the crystalline metals which is 5 to 7%.
  • said feet 9 are fixed to said dial 7 by welding.
  • said feet 9 are arranged as the feet 9 according to the prior art, that is to say having a smaller diameter in the area in contact 12 with the base of the dial 7 to prevent the Overflow of the weld prevents the dial 7 from being pressed correctly on the movement 5.
  • the plastic deformation is localized in this narrowed zone in order to preserve the dial 7.
  • the feet 9 will be welded to the support or chased in recesses 19 made on the support 17.
  • a second embodiment visible in the figure 4 it is planned to overmould directly the feet 9 at the dial 7 during the production of said feet 9.
  • the hot forming technique is used.
  • said dial 7. Then the dial 7 is placed between the matrices and the steps a) to g) previously described are made so that the amorphous metal is overmolded directly into the recesses 19 and that said feet 9 are formed.
  • the feet 9 are held on the dial 7 by the flanks 25 of the recesses 19 when said recesses 19 have a constant section. The friction between these flanks 25 and the amorphous metal then prevent the feet 9 from coming off.
  • holding means 23 are arranged. These holding means 23 can take various forms.
  • these holding means 23 may be the flanks 25 of the recesses 19 which are arranged to have a non-constant section.
  • the bottom section 21 of the recess 19 is larger than that at the surface of the dial 7. It can also be expected that the section expands steadily when approaching the bottom 21 of the 19. This arrangement of the section of the recesses 19 in which are fixed the feet 9 allows a natural retention of said feet 9 in said recesses 19 without requiring welding or gluing.
  • the flanks 25 of the recesses 19 comprise reliefs 27.
  • These reliefs 27 may be in the form of recesses and / or projections arranged on the flanks 25 of each recess 19. These recesses and / or projections may be arranged so as to form a tapping allowing the screwing and unscrewing of the feet 9.
  • These reliefs 27 exploit the characteristics of the amorphous metal to be able to soften while remaining amorphous in a given temperature range [Tg - T x ] specific to each alloy thus marrying all the details of the negative.
  • the amorphous metal then inserts into the recesses of the flanks 25 thus ensuring a better hold of the foot 9 in the recess 19. It will be understood that, in the case where the dial 7 is attached to a support 17, the recesses 19, in which are realized the feet 9 and whose sides 25 comprise reliefs 27, are made on the support 17 as visible at the figure 7 .
  • a third embodiment, visible to the figure 8 consists in making the dial 7 and the feet 9 in one and the same piece, that is to say that the dial 7 and the feet 9 are made of amorphous metal simultaneously.
  • the dies constituting the mold form the complementary impression of the part composed of the dial 7 and the feet 9.
  • This part is then cast or hot-formed amorphous metal.
  • the advantage is to have in the first place a perfect reproducibility of the process since the dials 7 associated with their feet 9 are all made in the same mold.
  • this method has the advantage of being simple and not having a step of fixing the feet 9 with the risk of bending the feet 9 or deforming the dial 7.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Adornments (AREA)
EP10166916A 2010-06-22 2010-06-22 Zifferblattfuß einer Uhr Withdrawn EP2400354A1 (de)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP10166916A EP2400354A1 (de) 2010-06-22 2010-06-22 Zifferblattfuß einer Uhr
PCT/EP2011/060285 WO2011161080A1 (fr) 2010-06-22 2011-06-21 Pieds de cadran de piece d'horlogerie
EP11726429.1A EP2585880A1 (de) 2010-06-22 2011-06-21 Uhrziffernblattfüsse
US13/704,075 US20130148484A1 (en) 2010-06-22 2011-06-21 Dial foot of a timepiece
JP2013515849A JP5457608B2 (ja) 2010-06-22 2011-06-21 時計の文字盤押さえ
CN2011800310394A CN103038713A (zh) 2010-06-22 2011-06-21 时计的表盘面脚

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP10166916A EP2400354A1 (de) 2010-06-22 2010-06-22 Zifferblattfuß einer Uhr

Publications (1)

Publication Number Publication Date
EP2400354A1 true EP2400354A1 (de) 2011-12-28

Family

ID=43216757

Family Applications (2)

Application Number Title Priority Date Filing Date
EP10166916A Withdrawn EP2400354A1 (de) 2010-06-22 2010-06-22 Zifferblattfuß einer Uhr
EP11726429.1A Ceased EP2585880A1 (de) 2010-06-22 2011-06-21 Uhrziffernblattfüsse

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP11726429.1A Ceased EP2585880A1 (de) 2010-06-22 2011-06-21 Uhrziffernblattfüsse

Country Status (5)

Country Link
US (1) US20130148484A1 (de)
EP (2) EP2400354A1 (de)
JP (1) JP5457608B2 (de)
CN (1) CN103038713A (de)
WO (1) WO2011161080A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD792786S1 (en) * 2015-12-17 2017-07-25 Richemont International Sa Watch
EP3339970B1 (de) * 2016-12-21 2022-03-23 Rubattel et Weyermann S.A. Uhr-zifferblatt aus einer leichtmetall-legierung

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3020835B1 (de) * 2014-11-17 2021-04-21 Omega SA Uhr, Schmuckstück oder edler Schmuck, umfassend eine Komponente aus einer Legierung auf Palladiumbasis
TWD174047S (zh) * 2015-02-17 2016-03-01 葛拉夏特鐘錶企業有限公司 錶盤
USD796982S1 (en) * 2015-12-01 2017-09-12 Montblanc-Simplo Gmbh Watch dial
USD792261S1 (en) * 2015-12-01 2017-07-18 Montblanc-Simplo Gmbh Watch dial
USD798178S1 (en) * 2015-12-01 2017-09-26 Montblanc-Simplo Gmbh Watch dial
USD807770S1 (en) * 2015-12-01 2018-01-16 Montblanc-Simplo Gmbh Watch dial
US20210026306A1 (en) * 2019-07-25 2021-01-28 Casio Computer Co., Ltd. Dial, module, electronic device and timepiece
EP3816734A1 (de) * 2019-11-04 2021-05-05 ETA SA Manufacture Horlogère Suisse Elektronische armbanduhr mit solarzelle
EP3832396B1 (de) * 2019-12-03 2024-01-24 ETA SA Manufacture Horlogère Suisse Befestigungsvorrichtung eines anzeige- oder verkleidungselements einer uhr
EP3835880B1 (de) * 2019-12-10 2022-08-10 Comadur S.A. Uhrzifferblatt mit füsschen

Citations (12)

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Publication number Priority date Publication date Assignee Title
CH174131A (fr) * 1933-11-07 1934-12-31 Societe Anonyme Fabriqu Aegler Pièce d'horlogerie.
US1995036A (en) * 1932-09-13 1935-03-19 Premier Metal Etching Company Index dial plate
CH225819A (fr) * 1942-02-03 1943-02-28 Schwaab Albert Procédé de fabrication de cadrans à pieds, et cadran à pieds obtenu au moyen de ce procédé.
CH303714A (fr) * 1952-11-10 1954-12-15 Ferrier Jules Pièce d'horlogerie.
FR1307663A (fr) * 1961-12-07 1962-10-26 Procédé de fabrication d'un cadran de montre et cadran de montre obtenu par ce procédé
JPS55145138A (en) * 1979-04-26 1980-11-12 Seiko Epson Corp Exterior parts for watch
JPS55145139A (en) * 1979-04-26 1980-11-12 Seiko Epson Corp Exterior parts for watch
JPS60256081A (ja) * 1984-06-01 1985-12-17 Citizen Watch Co Ltd 時計用文字板
JPS61202184A (ja) * 1985-03-05 1986-09-06 Citizen Watch Co Ltd 時計用文字板
JPH04124246A (ja) * 1990-09-13 1992-04-24 Alps Electric Co Ltd 時計の文字盤
EP1538493A1 (de) * 2003-12-03 2005-06-08 Asulab S.A. Emailliertes Zifferblatt mit eingeschlagenen Füssen und Herstellungsverfahren dafür
EP2192454A1 (de) * 2008-11-28 2010-06-02 The Swatch Group Research and Development Ltd. Verfahren zur dreidimensionalen Verzierung

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CH379408A (fr) * 1962-04-09 1964-03-13 Montres Octo S A Montre à aiguille de secondes au centre
DE1523882C3 (de) * 1964-02-18 1973-09-20 Centre Electronique Horloger S.A., Neuenburg (Schweiz) Elektronische Uhr mit einem zweiarmi gen Biegeschwinger
US3803833A (en) * 1968-04-26 1974-04-16 Jap Sa Watch dial with integrally formed raised symbols
JPS5029954Y1 (de) * 1970-12-29 1975-09-03
JPS4881565A (de) * 1972-02-01 1973-10-31
US4150538A (en) * 1977-11-08 1979-04-24 Citizen Watch Company Limited Dial attaching device for watch
US4320483A (en) * 1979-04-09 1982-03-16 Societe Suisse Pour L'industrie Horlogere Management Services S.A. Attaching device of a dial on stationary parts of a timepiece movement
DE602004013268T2 (de) * 2004-01-26 2009-05-07 Nivarox-Far S.A. Herstellungsverfahren für Zeitindexen und Apparat für seine Implementierung
EP1640822B1 (de) * 2004-09-22 2012-08-01 Asulab S.A. Multi-Etage-Zifferblatt
CH702836B1 (fr) * 2008-06-23 2011-09-30 Omega Sa Pièce décorative réalisée par incrustation et pièce d'horlogerie comprenant une telle pièce.

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1995036A (en) * 1932-09-13 1935-03-19 Premier Metal Etching Company Index dial plate
CH174131A (fr) * 1933-11-07 1934-12-31 Societe Anonyme Fabriqu Aegler Pièce d'horlogerie.
CH225819A (fr) * 1942-02-03 1943-02-28 Schwaab Albert Procédé de fabrication de cadrans à pieds, et cadran à pieds obtenu au moyen de ce procédé.
CH303714A (fr) * 1952-11-10 1954-12-15 Ferrier Jules Pièce d'horlogerie.
FR1307663A (fr) * 1961-12-07 1962-10-26 Procédé de fabrication d'un cadran de montre et cadran de montre obtenu par ce procédé
JPS55145138A (en) * 1979-04-26 1980-11-12 Seiko Epson Corp Exterior parts for watch
JPS55145139A (en) * 1979-04-26 1980-11-12 Seiko Epson Corp Exterior parts for watch
JPS60256081A (ja) * 1984-06-01 1985-12-17 Citizen Watch Co Ltd 時計用文字板
JPS61202184A (ja) * 1985-03-05 1986-09-06 Citizen Watch Co Ltd 時計用文字板
JPH04124246A (ja) * 1990-09-13 1992-04-24 Alps Electric Co Ltd 時計の文字盤
EP1538493A1 (de) * 2003-12-03 2005-06-08 Asulab S.A. Emailliertes Zifferblatt mit eingeschlagenen Füssen und Herstellungsverfahren dafür
EP2192454A1 (de) * 2008-11-28 2010-06-02 The Swatch Group Research and Development Ltd. Verfahren zur dreidimensionalen Verzierung

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD792786S1 (en) * 2015-12-17 2017-07-25 Richemont International Sa Watch
EP3339970B1 (de) * 2016-12-21 2022-03-23 Rubattel et Weyermann S.A. Uhr-zifferblatt aus einer leichtmetall-legierung
EP3559758B1 (de) * 2016-12-21 2023-08-09 Rubattel et Weyermann S.A. Uhr-zifferblatt aus einer leichtmetall-legierung

Also Published As

Publication number Publication date
WO2011161080A1 (fr) 2011-12-29
JP5457608B2 (ja) 2014-04-02
CN103038713A (zh) 2013-04-10
JP2013529777A (ja) 2013-07-22
US20130148484A1 (en) 2013-06-13
EP2585880A1 (de) 2013-05-01

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