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EP2557461B1 - Metallanker mit Polymer-Hörnern - Google Patents

Metallanker mit Polymer-Hörnern Download PDF

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Publication number
EP2557461B1
EP2557461B1 EP12174749.7A EP12174749A EP2557461B1 EP 2557461 B1 EP2557461 B1 EP 2557461B1 EP 12174749 A EP12174749 A EP 12174749A EP 2557461 B1 EP2557461 B1 EP 2557461B1
Authority
EP
European Patent Office
Prior art keywords
pallets
fork
arms
pallet
staff
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.)
Active
Application number
EP12174749.7A
Other languages
English (en)
French (fr)
Other versions
EP2557461A1 (de
Inventor
Arthur Queval
Laurent Kaelin
Thomas Wyss
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.)
Nivarox Far SA
Nivarox SA
Original Assignee
Nivarox Far SA
Nivarox 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 Nivarox Far SA, Nivarox SA filed Critical Nivarox Far SA
Priority to EP12174749.7A priority Critical patent/EP2557461B1/de
Publication of EP2557461A1 publication Critical patent/EP2557461A1/de
Application granted granted Critical
Publication of EP2557461B1 publication Critical patent/EP2557461B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • G04B15/00—Escapements
    • G04B15/14—Component parts or constructional details, e.g. construction of the lever or the escape wheel
    • 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
    • G04B15/00—Escapements
    • G04B15/06—Free escapements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49579—Watch or clock making
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4998—Combined manufacture including applying or shaping of fluent material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/53613—Spring applier or remover
    • Y10T29/53626—Flat spiral spring [e.g., watch or clock type]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/53639—Means to stake watch or clock

Definitions

  • the invention relates to an exhaust system of a timepiece and, more specifically, to such a system comprising an anchor whose function of the rod and that of the fork can be decoupled.
  • the Swiss-anchor type free-escapement systems are difficult to develop because they are the compromise between the lowest possible inertia and a pallet and fork tribology, the best possible. Thus, it is difficult to avoid snags between the plateau pin and the horns of the fork while preserving minimal inertia and even insensitivity to magnetic fields.
  • the document EP 2 320 280 discloses an anchor for an exhaust system whose dart came form with the rod.
  • the fork is formed apart from the rod and then mounted on it.
  • the object of the present invention is to overcome all or part of the disadvantages mentioned above by proposing a method of manufacturing an anchor whose rod has a low inertia and a range with favorable tribological qualities.
  • the mechanical characteristics provided by the material of the rod are no longer dependent on those of the fork. Therefore, as an example, the baguette can advantageously offer a low inertia and the range an optimized tribology.
  • an exhaust system 1 for a timepiece As visible at figure 2 in section, the exhaust system 1 comprises in particular an anchor 3 intended to cooperate with a plate 5.
  • the plate 5 is preferably driven on the balance shaft 2 and comprises a small plate 4 provided with a notch 6 and a large tray 8 with ankle 7.
  • the anchor 3 preferably comprises a rod 9 formed by a first metal material which is preferentially chosen for its low density, its low sensitivity to magnetic fields and possibly its ability to change pallets 10, 12 for example ruby.
  • such a rod material 9 may be, for example, titanium, aluminum or an austenitic cobalt alloy.
  • the rod 9 comprises arms 11 and 13 for supporting the pallets 10 and 12 to cooperate with at least one escape wheel (not shown) of the exhaust system 1. Between these two arms 11 and 13 is mounted the anchor rod 14 to pivotably mount the anchor 3.
  • the rod 14 may be made, for example, of a material such as steel, brass or nickel silver.
  • the rod 9 comprises a dart 15 and a fork 17.
  • the dart 15 has come in shape with the rod 9 and, preferably, an extension of the latter.
  • the dart 15 is intended to cooperate with the small plate 4 to prevent accidental movements of the fork 17.
  • the fork 17 preferably comprises an overmoulding 19 formed by a second material, different from the first material of the rod 9 and intended to allow the improvement of the tribological qualities of the fork 17 on the ankle 7, without affecting the inertia 3.
  • the material of the fork 17 is also paramagnetic in order to reduce the sensitivity of the anchor 3 to the magnetic fields.
  • the material of the fork 17 is ideally a material having a low wear and a low coefficient of friction in association with the pin 7 of the large plate 8. Such a material may be a polymer.
  • the polymer used is polyoxymethylene (POM) for its special shock absorbing capabilities in addition to its low sensitivity to magnetic fields and its very good tribological qualities.
  • POM polyoxymethylene
  • the air pressure exerted by the ruby ankle on polyoxymethylene horns was limited to 54 MPa, an 85% decrease in mechanical stress compared to standard steel horns.
  • the fork 17 is preferably overmolded over the rod 9 at the stinger 15 and comprises two horns 16 and 18 intended to come into contact with the pin 7 of large plate 8 in order, following the rotation of the pin 7, to drive the anchor 3 pivoting about its rod 14 in a movement back and forth.
  • the anchor 3 is optimized between the desired sensitivity to the magnetic fields and / or the desired inertia of the rod 9, on the one hand, and on the other hand the low wear and the low coefficient of friction in association with the ankle 7, of the fork 17.
  • the overmolding of the fork 17 traps the rod 9 to ensure that it does not disengage.
  • the rod 9 comprises notches 25, 26 allowing overmoulding to form bridges 20 and 21 of polymer material blocking the fork 17 against the rod 9.
  • the rod 9, the pallets 10, 12 or the rod 14 may differ.
  • the pallets 10, 12 may have come in shape with the rod 9 if it is not desired to be able to change the pallets 10, 12.
  • the pallets 10, 12 may be overmolded identically or similarly with respect to the fork 17, that is to say with a polymer such as polyoxymethylene.
  • the method 31 for manufacturing the anchor 3 will now be explained in connection with the figure 5 .
  • the method 31 comprises a first step 33 intended to form with a first material the body of the anchor 3 whose one end comprises the stinger 15 and a second end comprises the two arms 11, 13 for each suppoprtre a pallet 10, 12.
  • Step 33 can be performed by many techniques such as, for example, a LIGA process, stamping or bar turning. This step 33 allows the manufacture in one piece of the rod 9, the arms 11, 13 and the dart 15. As visible in the figure 3 the rod 9 has a hole 22 for adjusting the rod 14. In addition, each arm 11, 13 has a hole 23, 24 for adjusting a pallet 10, 12.
  • step 33 is also intended to form a pallet 10, 12 formed on each arm 11, 13.
  • step 33 also makes it possible, preferably, to form notches 25, 26 intended to be filled by the future overmolding (s).
  • the method 31 continues with the second step 35 for overmoulding a second material at the first end, that is to say at the level of the stinger 15, to form the fork 17 and, possibly, at the level of said second end to form the pallets 10, 12.
  • the mold 27 used for the overmolding is performed by a LIGA process, that is to say a photolithography followed by electroplating.
  • the mold 27 has stops 28 and 29 for respectively locking the arms 13, 11 and the rod 9. Only the cavity 30 of the mold 27 is intended to be filled. Of course, several overmouldings could be made on the same mold 27, that is to say that the mold 27 has several cavities 30 and that are placed several anchor bodies in the mold and / or other parts of the mold. the rod 9 are molded as, for example, to achieve the second alternative.
  • the step 35 consists, in a preferred manner, in over-molding the body of the anchor by injecting the polymer into the cavity 30 of the mold 27 in order to form the body of the fork 17 with, in particular, the horns 16 and 18 and, optionally, according to the second alternative, to form the pallets 10, 12 at the arms 11, 13.
  • the third step 37 of the method 31 is intended to mount the pallets 10, 12 in the holes 23, 24 and the rod 14 in the hole 22 in order to mount the anchor 3 to rotate.
  • the anchor 3 is finished and can be mounted in a timepiece as part of an exhaust system 1 of the Swiss type.
  • step 37 is limited to mounting the rod 14 in the hole 22 in order to mount the anchor 3 to rotate.
  • the anchor 3 is of the composite type, i.e. it is formed from two different materials. So, as visible at the figure 2 it can be seen that the anchor 3 preferably comprises, at the level of the axis A, a height entirely made by the second material thanks to the notch 25 made during the step 31 forming in particular an eyelet in the rod 9.
  • the shapes of the anchor 3 and / or the plate 5 may be different.
  • the anchor 3 may thus comprise, for example, at least a third arm intended to support at least a third pallet for the application of the invention to a coaxial type exhaust system.
  • first and second different materials can also be understood in a difference in outer coating while their soul is identical.
  • the rod 9 could thus be formed of silicon coated with a polymer without departing from the fact that the first material of the rod 9 is different from the second material of the fork 17.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Forging (AREA)
  • Table Equipment (AREA)
  • Prostheses (AREA)
  • Mechanical Operated Clutches (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)

Claims (15)

  1. Verfahren (31) zum Herstellen eines Ankers (3) für ein Hemmungssystem (1), dadurch gekennzeichnet, dass es folgende Schritte umfasst:
    a) Ausbilden (33) des Körpers des Ankers (3) mit Hilfe eines ersten Werkstoffs, wobei ein erstes Ende dieses Körpers den Sicherheitsstift (15) umfasst und ein zweites Ende zwei Arme (11, 13) umfasst, die dazu bestimmt sind, jeweils eine Palette (10, 12) aufzunehmen;
    b) Abformen (35) eines zweiten Werkstoffs im Bereich des ersten Endes, um eine Gabel (17) zu bilden, wobei der zweite Werkstoff verschieden vom Ersten ist;
    c) Montieren (37) der Paletten und einer Welle (14), um den Anker (3) drehbeweglich montieren zu können.
  2. Verfahren (31) zum Herstellen eines Ankers (3) für ein Hemmungssystem (1), dadurch gekennzeichnet, dass es folgende Schritte umfasst:
    a') Ausbilden (33) des Körpers des Ankers (3) mit Hilfe eines ersten Werkstoffs, wobei ein erstes Ende dieses Körpers den Sicherheitsstift (15) umfasst und ein zweites Ende zwei Arme (11, 13) umfasst, die jeweils eine einteilig damit ausgebildete Palette (10, 12) bilden;
    b) Abformen (35) eines zweiten Werkstoffs im Bereich des ersten Endes, um eine Gabel (17) zu bilden, wobei der zweite Werkstoff verschieden vom Ersten ist;
    c') Montieren (37) einer Welle (14), um den Anker (3) drehbeweglich montieren zu können.
  3. Verfahren (31) zum Herstellen eines Ankers (3) für ein Hemmungssystem (1), dadurch gekennzeichnet, dass es folgende Schritte umfasst:
    a) Ausbilden (33) des Körpers des Ankers (3) mit Hilfe eines ersten Werkstoffs, wobei ein erstes Ende dieses Körpers den Sicherheitsstift (15) umfasst und ein zweites Ende zwei Arme (11, 13) umfasst, die dazu bestimmt sind, jeweils eine Palette (10, 12) aufzunehmen;
    b') Abformen (35) eines zweiten Werkstoffs im Bereich des ersten Endes, um eine Gabel (17) zu bilden, und im Bereich des zweiten Endes, um die Paletten (10, 12) zu bilden, wobei der zweite Werkstoff verschieden vom Ersten ist;
    c') Montieren (37) einer Welle (14), um den Anker (3) drehbeweglich montieren zu können.
  4. Verfahren (31) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Schritt a) oder a') durch einen LIGA-Prozess, eine Prägung oder eine Abstecharbeit ausgeführt wird.
  5. Verfahren (31) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der erste Werkstoff ein Metall oder eine Metall-Legierung ist.
  6. Verfahren (31) nach vorhergehendem Anspruch, dadurch gekennzeichnet, dass der erste Werkstoff Titan, Aluminium oder eine Legierung aus austenitischem Kobalt umfasst.
  7. Verfahren (31) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Schritt b) oder b') durch eine Einspritzung in eine mit Hilfe eines LIGA-Prozesses gebildete Gussform ausgeführt wird.
  8. Verfahren (31) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der zweite Werkstoff ein Polymer ist.
  9. Verfahren (31) nach vorhergehendem Anspruch, dadurch gekennzeichnet, dass der zweite Werkstoff Polyformaldehyd umfasst.
  10. Verfahren (31) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Welle (14) aus Stahl, aus Messing oder aus einer Nickel-Kupfer-Zinklegierung gebildet ist.
  11. Anker (3) für ein Hemmungssystem (1), umfassend:
    - einen aus einem Stück gebildeten Ankerkörper aus einem ersten Werkstoff, wobei ein erstes Ende dieses Körpers einen Sicherheitsstift (15) umfasst und ein zweites Ende zwei Arme (11, 13) umfasst, die dazu bestimmt sind, jeweils eine Palette (10, 12) aufzunehmen;
    - eine Welle (14), die auf dem Ankerkörper montiert ist;
    - eine Gabel (17), die von einem zweiten Werkstoff gebildet ist, der verschieden vom ersten Werkstoff ist,
    dadurch gekennzeichnet, dass die Gabel (17) im Bereich des ersten Endes des Ankerkörpers abgeformt ist.
  12. Anker (3) für ein Hemmungssystem (1), umfassend:
    - einen aus einem Stück gebildeten Ankerkörper aus einem ersten Werkstoff, wobei ein erstes Ende dieses Körpers einen Sicherheitsstift (15) umfasst und ein zweites Ende zwei Arme (11, 13) umfasst, die jeweils eine einteilig damit ausgebildete Palette (10, 12) bilden;
    - eine Welle (14), die auf dem Ankerkörper montiert ist, und
    - eine Gabel (17), die von einem zweiten Werkstoff gebildet ist, der verschieden vom ersten Werkstoff ist, wobei die Gabel (17) im Bereich des ersten Endes des Ankerkörpers abgeformt ist.
  13. Anker (3) für ein Hemmungssystem (1), umfassend:
    - einen aus einem Stück gebildeten Ankerkörper aus einem ersten Werkstoff, wobei ein erstes Ende dieses Körpers einen Sicherheitsstift (15) umfasst und ein zweites Ende zwei Arme (11, 13) umfasst, die dazu bestimmt sind, jeweils eine Palette (10, 12) aufzunehmen;
    - zwei Paletten (10, 12) im Bereich der beiden Arme (11, 13);
    - eine Welle (14), die auf dem Ankerkörper montiert ist;
    - eine Gabel (17), die von einem zweiten Werkstoff gebildet ist, der verschieden vom ersten Werkstoff ist,
    dadurch gekennzeichnet, dass die Gabel (17) im Bereich des ersten Endes des Ankerkörpers abgeformt ist, und dass die Paletten im Bereich der Arme (11, 13) ebenfalls abgeformt sind.
  14. Hemmungssystem (1), das einen Anker gemäss einem der Ansprüche 11 bis 13 umfasst.
  15. Zeitmessgerät, das ein Hemmungssystem gemäss vorhergehendem Anspruch umfasst.
EP12174749.7A 2011-08-12 2012-07-03 Metallanker mit Polymer-Hörnern Active EP2557461B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12174749.7A EP2557461B1 (de) 2011-08-12 2012-07-03 Metallanker mit Polymer-Hörnern

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP11177438A EP2557460A1 (de) 2011-08-12 2011-08-12 Metallanker mit Polymer-Hörnern
EP12174749.7A EP2557461B1 (de) 2011-08-12 2012-07-03 Metallanker mit Polymer-Hörnern

Publications (2)

Publication Number Publication Date
EP2557461A1 EP2557461A1 (de) 2013-02-13
EP2557461B1 true EP2557461B1 (de) 2014-06-25

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EP11177438A Withdrawn EP2557460A1 (de) 2011-08-12 2011-08-12 Metallanker mit Polymer-Hörnern
EP12174749.7A Active EP2557461B1 (de) 2011-08-12 2012-07-03 Metallanker mit Polymer-Hörnern

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP11177438A Withdrawn EP2557460A1 (de) 2011-08-12 2011-08-12 Metallanker mit Polymer-Hörnern

Country Status (6)

Country Link
US (1) US9015921B2 (de)
EP (2) EP2557460A1 (de)
JP (1) JP5749696B2 (de)
CN (1) CN102955418B (de)
HK (1) HK1183111A1 (de)
RU (1) RU2012134395A (de)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2813906A1 (de) * 2013-06-12 2014-12-17 Nivarox-FAR S.A. Bauteil für Uhrwerk
EP2952971B1 (de) * 2014-06-05 2016-10-12 Nivarox-FAR S.A. Anker für Hemmungsmechanismus eines Uhrwerks
CH710278B1 (fr) * 2014-10-24 2024-02-15 Richemont Int Sa Organe réglant pour un mouvement horloger mécanique.
EP3273307A1 (de) * 2016-07-19 2018-01-24 Nivarox-FAR S.A. Bauteil für uhrwerk
EP3316046B1 (de) * 2016-10-25 2019-07-31 The Swatch Group Research and Development Ltd Verbessertes uhrwerk
EP3327515B1 (de) * 2016-11-23 2020-05-06 ETA SA Manufacture Horlogère Suisse Sich drehender resonator mit einer flexiblen führung, der von einer freien ankerhemmung gehalten wird
EP3489763B1 (de) * 2017-11-22 2021-06-16 Nivarox-FAR S.A. Anker für die bewegungshemmung eines uhrwerks
JP7143675B2 (ja) * 2018-08-14 2022-09-29 セイコーエプソン株式会社 時計用部品、ムーブメントおよび時計

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US2663139A (en) * 1949-10-31 1953-12-22 Gibbs Mfg And Res Corp Pallet lever construction
CH357337A (de) * 1959-09-30 1961-09-30 Ebauchesfabrik Eta Ag Anker für Uhrwerk
CH1060869A4 (de) * 1969-07-11 1971-06-30
JPS4925535B1 (de) * 1969-08-27 1974-07-01
JPS4844138A (de) 1971-06-15 1973-06-25
CH578754B5 (de) * 1972-10-12 1976-08-13 Favre Marc & Co Sa
CH711574A4 (de) * 1974-05-24 1975-11-28
JPS5393166U (de) * 1976-12-24 1978-07-29
FR2731715B1 (fr) * 1995-03-17 1997-05-16 Suisse Electronique Microtech Piece de micro-mecanique et procede de realisation
CH695711A5 (fr) * 2002-01-29 2006-07-31 Franck Muller Watchland Sa Ancre d'un échappement pour pièce d'horlogerie.
ATE430953T1 (de) * 2004-07-02 2009-05-15 Nivarox Sa Spiralfeder aus zwei materialen mit selbstkompensation
DE06405114T1 (de) 2006-03-15 2008-04-24 Doniar S.A. LIGA Verfahren zur Herstellung einer einzel- oder mehrlagigen metallischen Struktur und damit hergestellte Struktur
JP4868443B2 (ja) * 2006-04-12 2012-02-01 セイコーインスツル株式会社 時計用のアンクル、これを備えた機械式時計及びその製造方法
JP5462006B2 (ja) * 2009-02-17 2014-04-02 セイコーインスツル株式会社 脱進調速機、機械式時計、及びアンクル体の製造方法
EP2320280A1 (de) * 2009-11-06 2011-05-11 Nivarox-FAR S.A. Anker für Hemmungssystem eines Uhrwerks
EP2413202B1 (de) * 2010-07-30 2017-11-15 ETA SA Manufacture Horlogère Suisse Verfahren zur Verbesserung der Verschleiss- und Stossfestigkeit einer Uhrwerkskomponente. Verschleiß- und stoßfester Anker für Uhrwerk

Also Published As

Publication number Publication date
RU2012134395A (ru) 2014-02-20
CN102955418B (zh) 2015-06-10
EP2557461A1 (de) 2013-02-13
JP5749696B2 (ja) 2015-07-15
EP2557460A1 (de) 2013-02-13
JP2013040934A (ja) 2013-02-28
US20130036599A1 (en) 2013-02-14
HK1183111A1 (en) 2013-12-13
CN102955418A (zh) 2013-03-06
US9015921B2 (en) 2015-04-28

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