EP1973013B1 - Unruh für Uhrwerk - Google Patents

Unruh für Uhrwerk Download PDF

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Publication number
EP1973013B1
EP1973013B1 EP20070005731 EP07005731A EP1973013B1 EP 1973013 B1 EP1973013 B1 EP 1973013B1 EP 20070005731 EP20070005731 EP 20070005731 EP 07005731 A EP07005731 A EP 07005731A EP 1973013 B1 EP1973013 B1 EP 1973013B1
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EP
European Patent Office
Prior art keywords
balance
inertia
arms
balance according
hub
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Application number
EP20070005731
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English (en)
French (fr)
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EP1973013A1 (de
Inventor
Laurent Rougny
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.)
Richemont International SA
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Richemont International SA
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Publication date
Application filed by Richemont International SA filed Critical Richemont International SA
Priority to EP20070005731 priority Critical patent/EP1973013B1/de
Priority to DE200760011393 priority patent/DE602007011393D1/de
Priority to CNA200810086895XA priority patent/CN101271315A/zh
Publication of EP1973013A1 publication Critical patent/EP1973013A1/de
Priority to HK08112497.5A priority patent/HK1118617B/xx
Application granted granted Critical
Publication of EP1973013B1 publication Critical patent/EP1973013B1/de
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    • 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
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/04—Oscillators acting by spring tension
    • G04B17/08—Oscillators with coil springs stretched and unstretched axially

Definitions

  • the subject of the present invention is a pendulum for a clockwork movement that makes it possible to achieve high performances, that is to say to present higher quality factors than current balances both in horizontal position (Qh) and in position. vertical (Qv).
  • a first object of the present invention is to provide a balance whose quality factors Qh and Qv are the highest possible.
  • a second object of the invention is to provide a balance having good Qh and Qv intrinsic quality factors but which is optimized in the sense that the difference between quality factors Qh and Qv is reduced in order to reduce the differences in amplitudes. in flat-hung and thus ensure that the energy losses for the operation of an exhaust regulator provided with such a pendulum undergo variations as low as possible depending on the position of the balance in space.
  • the pendulum for a watch movement according to the present invention is distinguished by the features set forth in claim 1.
  • the performance of a pendulum for a watch movement is characterized by its ability to oscillate in various positions.
  • the oscillation capacity of a balance spring system is measured by quality factors Qv in vertical position and Qh in horizontal position.
  • Q ⁇ ⁇ tps . freq ln 300 - ln 200
  • ⁇ the constant pi freq is the oscillation frequency of the pendulum tps is the time elapsed to go from 300 degrees to 200 degrees.
  • the factor Qv is naturally worse than the factor Qh because the friction in the bearings of the balance shaft are greater in the vertical position thereof than in horizontal position.
  • the objective of the present invention is to provide a better performing balance therefore can lead to quality factors Qv and Qh improved significantly.
  • the balance according to the present invention comprises a hub 1 intended to be fixed on a balance shaft connected to at least two weights 3 by arms 2.
  • the weights 3 are independent, that is to say they are not in contact with each other, but preferably they all have the same size and the same shape and they are evenly distributed around the hub 1.
  • the balance illustrated at Figures 1 and 2 comprises two flyweights 3, but in variants the balance could comprise three, four, or even more flyweights 3.
  • the cumulative angle of the arcs formed by all the flyweights is an angle which is considerably lower than 360 ° so that, compared to conventional balances, the beam of the rod according to the invention is effectively partially reduced or eliminated reducing accordingly the surfaces in contact with the air and thus the friction forces that derive therefrom.
  • this cumulative angle is less than or equal to 225 °, but in certain preferred embodiments (such as those of Figures 1 and 2 ), this cumulative angle is equal to or less than 90 °.
  • the balance is made of a single high density material, such as platinum, gold or their alloys.
  • the two arms 2 are perforated and thin to reduce the weight in order to concentrate the weight of the balance as far as possible from the axis.
  • the arms are profiled so as to oppose less resistance to air during pendulum oscillations.
  • the frontal slices 2a, 2b of the arms are not perpendicular to the plane of the balance but inclined V-shaped or C to allow better penetration into the air during their oscillations.
  • each weight 3 is connected to the hub 1 by a single arm 2, so that each arm 2 carries its own weight 3 at its end.
  • a flyweight can be connected to the hub 1 by several arms, the arms being preferably thinner and / or more perforated in this case.
  • the arms 2 may have a variable geometric section so that they are wider near the hub 1 and thinner near the weights 3.
  • the geometry of the arms is optimized to tend to a beam of equal strength which reduces the thickness or width of the arms towards their ends.
  • the arms are therefore thinner from the center to the outside which allows to obtain a minimum weight and stresses tending to be substantially constant along the arms. These arms are therefore more variable section to the center than to the end thus allowing to lighten the arms.
  • weights 3 Most of the weight of the balance is concentrated in the weights 3 fixed on or come from a workpiece with the ends of the arms, These weights 3 comprise front portions 3a, 3b contoured to optimize their penetration into the air.
  • Each weight 3 comprises peripheral housing 4 in which are arranged the heads of the adjusting screws 5 screwed into the counterweight and allowing balancing and perfect adjustment of the balance.
  • Compared to a traditional balance wheel balance according to the invention allows to reduce the weight for a given size by the removal of the continuous serge which is replaced by individual weights and the openwork of the arms.
  • the rocker according to the invention can significantly reduce the friction with air moving parts, the surfaces in contact being reduced and the arms and the weights being aerodynamically profiled.
  • the second embodiment of the pendulum according to the invention illustrated in FIG. figure 2 is a bi-material balance.
  • the arms 2 are made of a light material such as titanium, aluminum, magnesium or their alloys or even a lightweight composite material and are also openwork.
  • the weights 3 are similar to those described with reference to the first embodiment and are fixed by screws, rivets or overmoulding, gluing or any other way on the end of the arms 2. As in the first form of The execution of the arms 2 and the weights 3 are aerodynamically profiled to reduce friction in the air.
  • This improvement in efficiency (loss of energy dissipated) of the balance according to the invention makes it possible to substantially increase the choice or combination of either the power reserve or the operating amplitude.
  • the balance is made of one or more materials it always comprises several, at least two, arms distributed uniformly around a hub 1, each of these arms 2 carrying a weight 3 independent.
  • all the weights have the same size and the same shape,
  • each weight 3 is preferably connected by a single arm to said hub.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Gyroscopes (AREA)
  • Micromachines (AREA)

Claims (12)

  1. Unruh für ein Uhrwerk, die ein Mittel (1), das dazu bestimmt ist, an einer Unruhwelle befestigt zu werden, und mindestens zwei unabhängige Ausgleichsgewichte (3) umfasst, wobei jedes Ausgleichsgewicht durch mindestens einen Arm (2) mit dem Mittel (1) verbunden ist, wobei die Ausgleichsgewichte (3) gleichförmig um das Mittel (1) verteilt sind und alle dieselbe Größe und dieselbe Form aufweisen, dadurch gekennzeichnet, dass jedes der Ausgleichsgewichte (3) eine allgemeine, auf das Mittel (1) zentrierte Kreisbogenform aufweist; dadurch, dass der summierte Winkel der durch alle Ausgleichsgewichte gebildeten Kreisbögen kleiner als 225° ist; und dadurch, dass der größte Teil des Gewichts der Unruh sich in den Ausgleichsgewichten (3) konzentriert.
  2. Unruh nach Anspruch 1, dadurch gekennzeichnet, dass der summierte Winkel der durch alle Ausgleichsgewichte gebildeten Kreisbögen kleiner oder gleich 90° ist.
  3. Unruh nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass jedes Ausgleichsgewicht (3) durch einen einzigen Arm (2) mit dem Mittel (1) verbunden ist, damit jeder Arm (2) an seinem Ende sein eigenes Ausgleichsgewicht (3) trägt.
  4. Unruh nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Arme durchbrochen sind, um ihr Gewicht zu vermindern.
  5. Unruh nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die stirnseitigen Bereiche (2a, 2b) der Arme C- oder V-Profile sind, um bei den Pendelbewegungen der Unruh ihr Eindringen in die Luft zu erleichtern.
  6. Unruh nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die stirnseitigen Abschnitte (3a, 3b) der Ausgleichsgewichte (3) Profile sind, um bei den Pendelbewegungen der Unruh ihr Eindringen in die Luft zu erleichtern.
  7. Unruh nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Arme (2) aus einem leichten Werkstoff ausgeführt sind, der unter Magnesium, Aluminium, Titan und ihren Legierungen oder einem leichten Verbundwerkstoff ausgewählt ist, während die Ausgleichsgewichte (3) aus einem schweren Werkstoff ausgeführt sind, der unter Platin, Gold, Molybdän oder ihren Legierungen ausgewählt ist.
  8. Unruh nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Qualitätsfaktoren einer Unruh mit Spiralfeder, die gemessen werden, wenn die Pendelebene horizontal beziehungsweise vertikal ist, Qh von 400 bis 600 und Qv von 300 bis 400 betragen, wobei diese Faktoren wie folgt bestimmt werden: Q h / v = π ⁢ tps . freq ln 300 . ln 200
    Figure imgb0004
    wobei freq die Pendelfrequenz der Unruh ist und tps die Zeit ist, die zum Übergang der Amplitude von 300° auf 200° verstreicht.
  9. Unruh nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Arme (2) einen veränderlichen geometrischen Querschnitt aufweisen, damit ihre Querschnitte in der Nähe des Mittels (1) größer und in der Nähe der Ausgleichsgewichte (3) kleiner sind.
  10. Unruh nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass jedes der Ausgleichsgewichte (3) mindestens eine Stellschraube (5) umfasst.
  11. Unruh nach Anspruch 10, dadurch gekennzeichnet, dass jedes der Ausgleichsgewichte (3) zwei Stellschrauben (5) umfasst, deren Köpfe in Aufnahmen am Umfang (4) der Ausgleichsgewichte (3) angeordnet sind.
  12. Verfahren zur Herstellung einer Unruh nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die unabhängigen Ausgleichsgewichte (3) aus einem Werkstück mit den Armen (2) bestehen, wobei die Unruh so aus einem einzigen Werkstoff ausgeführt wird.
EP20070005731 2007-03-21 2007-03-21 Unruh für Uhrwerk Active EP1973013B1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP20070005731 EP1973013B1 (de) 2007-03-21 2007-03-21 Unruh für Uhrwerk
DE200760011393 DE602007011393D1 (de) 2007-03-21 2007-03-21 Unruh für Uhrwerk
CNA200810086895XA CN101271315A (zh) 2007-03-21 2008-03-20 时计运转装置的平衡器
HK08112497.5A HK1118617B (en) 2008-11-14 Balance for a timepiece movement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20070005731 EP1973013B1 (de) 2007-03-21 2007-03-21 Unruh für Uhrwerk

Publications (2)

Publication Number Publication Date
EP1973013A1 EP1973013A1 (de) 2008-09-24
EP1973013B1 true EP1973013B1 (de) 2010-12-22

Family

ID=38983366

Family Applications (1)

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EP20070005731 Active EP1973013B1 (de) 2007-03-21 2007-03-21 Unruh für Uhrwerk

Country Status (3)

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EP (1) EP1973013B1 (de)
CN (1) CN101271315A (de)
DE (1) DE602007011393D1 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH700640B1 (fr) * 2009-03-19 2014-09-30 Mhvj Manufacture Horlogère Vallée De Joux Pièce d'horlogerie allegée et renforcée.
EP2410387B1 (de) * 2010-07-19 2016-07-06 Nivarox-FAR S.A. Unruh mit Trägheitsregulierung ohne Einsatzteil
US9535404B2 (en) 2011-12-09 2017-01-03 Cartier International Ag Method for adapting a timepiece movement provided to operate in ambient atmospheric pressure so as to operate in a low-pressure atmosphere
USD805942S1 (en) * 2016-03-23 2017-12-26 Robert W. Koelewyn Hub and hands of a watch
EP3667432B1 (de) * 2018-12-13 2022-05-11 ETA SA Manufacture Horlogère Suisse Uhrresonator, der mindestens eine flexible führung umfasst
EP3839656B1 (de) * 2019-12-18 2023-12-13 Nivarox-FAR S.A. Unruh für uhrwerk

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1238853B (de) * 1964-11-16 1967-04-13 Hugo Hettich Verfahren zur Befestigung der wendelfoermigen Richtkraftfeder bei einer schwebend aufgehaengten Unruh fuer Wand- und Tischuhren
CH551033A (de) * 1971-04-02 1974-06-28
DE602005023633D1 (de) * 2004-10-26 2010-10-28 Tag Heuer Sa Armbanduhr-regulierungsglied und mechanisches uhrwerk mit einem solchen regulierungsglied

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Publication number Publication date
HK1118617A1 (en) 2009-02-13
DE602007011393D1 (de) 2011-02-03
EP1973013A1 (de) 2008-09-24
CN101271315A (zh) 2008-09-24

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