EP2102717B1 - Oscillateur mecanique pour une piece d'horlogerie - Google Patents

Oscillateur mecanique pour une piece d'horlogerie Download PDF

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Publication number
EP2102717B1
EP2102717B1 EP07857010.8A EP07857010A EP2102717B1 EP 2102717 B1 EP2102717 B1 EP 2102717B1 EP 07857010 A EP07857010 A EP 07857010A EP 2102717 B1 EP2102717 B1 EP 2102717B1
Authority
EP
European Patent Office
Prior art keywords
mechanical oscillator
balance
oscillator according
counterweights
axis
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
EP07857010.8A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2102717A2 (fr
Inventor
Franck Orny
Stephen Forsey
Johnny Girardin
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.)
Complitime SA
Original Assignee
Complitime 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
Priority claimed from CH02119/06A external-priority patent/CH701155B1/fr
Application filed by Complitime SA filed Critical Complitime SA
Priority to EP07857010.8A priority Critical patent/EP2102717B1/fr
Publication of EP2102717A2 publication Critical patent/EP2102717A2/fr
Application granted granted Critical
Publication of EP2102717B1 publication Critical patent/EP2102717B1/fr
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Anticipated expiration legal-status Critical

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Classifications

    • GPHYSICS
    • G04HOROLOGY
    • G04BMECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B17/00Mechanisms for stabilising frequency
    • G04B17/04Oscillators acting by spring tension
    • G04B17/06Oscillators with hairsprings, e.g. balance
    • G04B17/066Manufacture of the spiral spring
    • GPHYSICS
    • G04HOROLOGY
    • G04BMECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B17/00Mechanisms for stabilising frequency
    • G04B17/04Oscillators acting by spring tension
    • G04B17/06Oscillators with hairsprings, e.g. balance
    • G04B17/063Balance construction
    • GPHYSICS
    • G04HOROLOGY
    • G04BMECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B18/00Mechanisms for setting frequency
    • G04B18/006Mechanisms for setting frequency by adjusting the devices fixed on the balance

Definitions

  • the materials used for producing the balance and the hairspring in the most frequently used mechanical oscillators are chosen so that the variation of the moment of inertia of the balance and the variation of the return torque of the respective hairspring compensate each other.
  • a cupro-beryllium alloy balance associated with a spiral made of specially designed alloys such as invar and élinvar, which is an alloy of iron-nickel having a coefficient very weak dilatation.
  • This type of balance spring is however always sensitive to magnetic fields.
  • the search for new alloys that can be used for producing the spiral is still relevant, as shown for example by the development of silinvar (TM) .
  • the self-compensating result of these alloys is mainly the result of two contrary influences, notably that of the temperature and that of the magnetostriction on the modulus of elasticity of the metal.
  • GB2416408 discloses a mechanical oscillator according to the preamble of claim 1.
  • the present invention aims to at least significantly reduce the self-compensating effect of the spiral.
  • the present invention proposes a spiral balance which is in wide temperature ranges insensitive to variations in temperature. temperature to avoid dilation and variation of the moment of inertia of the pendulum.
  • the object of the present invention is to propose a spiral balance having an improved stability of its frequency, both with regard to its sensitivity to variations in temperature and amplitude, as well as to magnetic fields.
  • the spring 12 is made from the same material as the balance 10. More specifically, the spring 12 and the plate 16 of the balance 10 are made of the same material. This embodiment of the balance 10 and / or its plate 16, and the spring 12 from the same material avoids the compensating effect of the spiral 12 relative to the balance 10, which thus has an almost constant inertia. As a result, the self-compensation between the balance 10 and the balance spring 12 is almost negligible.
  • the material chosen to produce the rocker 10, and / or its board 16, and the spiral 12, is preferably non-magnetic and has the advantage of having a coefficient of thermal expansion preferably 5 ⁇ 10 -6 / C °, and even more preferably 2 ⁇ 10 -6 / ° C maximum.
  • the density of the material is preferably in a range of 2.0 to 5.0 g / cm 3 , preferably 2.5 to 4.5 g / cm 3 , and still more preferably 3 to 4.0 g / cm 3 .
  • the shaft 14 of the balance 10 has an axis of symmetry, designated as the axis AA, which is also its pivot axis.
  • the shaft 14 is conventionally made of hardened steel and comprises a plate 14a, cylindrical portions 14b, 14c and 14d disposed on either side of the plate 14a and intended to receive respectively the shell 20, the plate 16 and the plateau 22. Its ends form pivots 14e and 14f intended to be engaged in bearings constituted in the frame of the timepiece, not shown in the drawing.
  • the rocker 10 and / or the spiral 12 are coated with nanoparticles of a material which is preferably non-magnetic and has the advantage of having a coefficient of thermal expansion of 5 ⁇ 10 -6 / ° C, and even more preferably 2 ⁇ 10 -6 / ° C maximum.
  • the density of said material is preferably in a range of 2.0 to 5.0 g / cm 3 , preferably 2.5 to 4.5 g / cm 3 , and still more preferably 3 to 4.0 g / cm 3 .
  • the balance 10 and the balance spring 12 have a nano-diamond coating.
  • This coating is also advantageously applicable to a sprung balance known to those skilled in the art, such as, for example, a sprung balance comprising a balance made of cupro-beryllium alloy associated with a spiral made of alloys specially studied as per example the invar.
  • the weights 18 are each formed of a nail 18a of cylindrical shape having an axis of symmetry, designated in the Fig. 2 as the BB axis, a heavy material whose density is greater than 15 g / cm 3 , for example gold or platinum, provided with a head 18b and a body 18c, and a ring 18d made of the same material.
  • the body 18c of each of the weights 18 is engaged in a hole 16d, the head 18b bearing against the board 16.
  • the ring 18d associated with it is fixed on the other side of the board 16, by driving, gluing or welding.
  • the weights 18 have a symmetrical structure with respect to the axis BB of each of the nails 18a. In this way, during changes in temperature, the nails expand or contract radially relative to the axis BB, without their center of gravity moves. Consequently, as a first approximation, this expansion does not modify the inertia of the pendulum.
  • the weights 19 have a center of gravity offset from the axis of the hole 16d in which they are engaged. In this way, by turning them, it is possible to modify the moment of inertia and thus correct the frequency of the oscillator. To allow this rotation, the weights 19 comprise a cylindrical portion 19a provided with axially oriented slots 19b, allowing a frictional attachment.
  • a low coefficient of thermal expansion and an optimized mass-radius ratio are obtained. More particularly, like the mechanical oscillator of Fig. 1 and 2 comprising the balance 10 and the spiral 12 is made from a very stable material relative to the temperature, its frequency is very stable and varies very little depending on the temperature. This frequency stability is enhanced by the fact that the flyweights 18 have a fixed center of gravity with respect to the axis of the balance 10. This makes it possible to achieve a high degree of isochronism of the mechanical oscillator according to a preferred embodiment of the invention. embodiment of the present invention, as illustrated in the Fig. 3 .
  • the Fig. 3 illustrates a diagram showing exemplary day-to-day variations of two different mechanical oscillators by way of example. These diurnal cycle variations are represented in seconds ([s]) on an axis 41, depending on the different temperatures at which the corresponding mechanical oscillators were tested. These temperatures are represented in degrees Celsius ([° C]] on an axis 31.
  • the material used to make the weights 18 preferably has a specific mass greater than 10. It may be in particular gold or platinum, while the balance 10 and the spiral 12 are made of diamond. In this way, the ratio between the moment of inertia and the specific mass is particularly favorable.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Micromachines (AREA)
  • Electric Clocks (AREA)
EP07857010.8A 2006-12-21 2007-12-20 Oscillateur mecanique pour une piece d'horlogerie Active EP2102717B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07857010.8A EP2102717B1 (fr) 2006-12-21 2007-12-20 Oscillateur mecanique pour une piece d'horlogerie

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP06026620 2006-12-21
CH02119/06A CH701155B1 (fr) 2006-12-27 2006-12-27 Oscillateur pour pièce d'horlogerie.
PCT/EP2007/011287 WO2008080570A2 (fr) 2006-12-21 2007-12-20 Oscillateur mecanique pour une piece d'horlogerie
EP07857010.8A EP2102717B1 (fr) 2006-12-21 2007-12-20 Oscillateur mecanique pour une piece d'horlogerie

Publications (2)

Publication Number Publication Date
EP2102717A2 EP2102717A2 (fr) 2009-09-23
EP2102717B1 true EP2102717B1 (fr) 2013-06-26

Family

ID=39589024

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07857010.8A Active EP2102717B1 (fr) 2006-12-21 2007-12-20 Oscillateur mecanique pour une piece d'horlogerie

Country Status (4)

Country Link
US (1) US8240910B2 (ja)
EP (1) EP2102717B1 (ja)
JP (1) JP2010513886A (ja)
WO (1) WO2008080570A2 (ja)

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2104005A1 (fr) * 2008-03-20 2009-09-23 Nivarox-FAR S.A. Balancier composite et son procédé de fabrication
EP2104008A1 (fr) * 2008-03-20 2009-09-23 Nivarox-FAR S.A. Organe régulateur monobloc et son procédé de fabrication
US10324419B2 (en) * 2009-02-06 2019-06-18 Domasko GmbH Mechanical oscillating system for a clock and functional element for a clock
EP2677369B1 (fr) * 2010-06-11 2015-01-14 Montres Breguet SA Balancier haute fréquence pour pièce d'horlogerie
EP2410386B1 (fr) * 2010-07-19 2018-10-03 Nivarox-FAR S.A. Balancier à réglage d'inertie avec insert
US9164485B2 (en) 2010-08-06 2015-10-20 Damasko Gmbh Oscillating body, mechanical oscillating system for wristwatches with such an oscillating body and watch with such an oscillating system
DE102011109220A1 (de) 2010-08-06 2012-02-09 Petra Damasko Schwingkörper, mechanisches Schwingsystem für Armbanduhren mit einem solchen Schwingkörper sowie Uhr mit einem derartigen Schwingsystem
EP2466396A1 (fr) * 2010-12-15 2012-06-20 The Swatch Group Research and Development Ltd. Blindage magnétique pour spiral de pièce d'horlogerie
CH704924B1 (de) * 2011-05-13 2015-05-29 Bucherer Ag Unruh für eine Uhr sowie Uhr.
EP3376306A1 (fr) * 2011-12-22 2018-09-19 The Swatch Group Research and Development Ltd Mobile pour instrument scientifique ou garde-temps
JP2013195297A (ja) * 2012-03-21 2013-09-30 Seiko Instruments Inc てんぷ構造体及び機械式時計
EP2680090A1 (fr) * 2012-06-28 2014-01-01 Nivarox-FAR S.A. Ressort-moteur pour une pièce d'horlogerie
EP2703909A1 (fr) * 2012-09-04 2014-03-05 The Swatch Group Research and Development Ltd. Résonateur balancier - spiral appairé
EP2717103B1 (fr) * 2012-10-04 2017-01-11 The Swatch Group Research and Development Ltd. Spiral lumineux
CH707815B1 (fr) * 2013-03-19 2017-05-31 Nivarox Far Sa Sous-ensemble de mécanisme d'échappement d'horlogerie comportant un ressort-spiral.
EP2781969B1 (fr) * 2013-03-19 2017-05-03 Nivarox-FAR S.A. Composant monobloc indémontable d'horlogerie
EP2784602B1 (fr) * 2013-03-26 2018-12-05 Montres Breguet SA Arbre de mobile à géométrie optimisée en environnement magnétique
USD759527S1 (en) * 2013-10-16 2016-06-21 Swatch Ltd Oscillating weight
CN107615182B (zh) * 2015-06-15 2020-02-07 西铁城时计株式会社 时钟的调速装置
EP4177677A1 (fr) 2016-06-13 2023-05-10 Rolex Sa Axe horloger
EP3502786A1 (fr) 2017-12-22 2019-06-26 The Swatch Group Research and Development Ltd Balancier pour pièce d'horlogerie et procédé de fabrication d'un tel balancier
EP3647883A1 (fr) * 2018-11-05 2020-05-06 CSEM Centre Suisse D'electronique Et De Microtechnique SA Balancier d'une piece d'horlogerie
EP3719588B1 (fr) * 2019-04-03 2021-11-03 The Swatch Group Research and Development Ltd Oscillateur horloger auto-réglable
CH716384A1 (fr) * 2019-07-02 2021-01-15 Soprod Sa Oscillateur pour mouvement horloger et pièce d'horlogerie comportant un tel oscillateur.
EP3839644A1 (fr) * 2019-12-20 2021-06-23 Nivarox-FAR S.A. Composant horloger flexible, notamment pour mecanisme oscillateur, et mouvement d'horlogerie comportant un tel composant

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GB845773A (en) 1956-08-10 1960-08-24 Junghans Geb Ag Improvements in or relating to balance wheels
CH783467A4 (ja) * 1967-06-02 1970-07-31
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CH604226B5 (ja) * 1975-12-12 1978-08-31 Ebauchesfabrik Eta Ag
FR2731715B1 (fr) * 1995-03-17 1997-05-16 Suisse Electronique Microtech Piece de micro-mecanique et procede de realisation
EP0957414B1 (fr) * 1998-05-07 2003-02-12 Janvier S.A. Masse de remontage oscillante pour pièce d'horlogerie à mouvement automatique et pièce d'horlogerie équipée d'une telle masse de remontage
US6855593B2 (en) 2002-07-11 2005-02-15 International Rectifier Corporation Trench Schottky barrier diode
AU2003205503A1 (en) * 2002-09-25 2004-04-19 Fore Eagle Co Ltd Mechanical parts
EP1445670A1 (fr) * 2003-02-06 2004-08-11 ETA SA Manufacture Horlogère Suisse Spiral de résonateur balancier-spiral et son procédé de fabrication
EP1654597B1 (fr) * 2003-08-13 2009-11-11 Fore Eagle Co Ltd Balancier thermocompense
EP1521141B1 (fr) * 2003-10-01 2007-05-30 Asulab S.A. Pièce d'horlogerie ayant un mouvement mécanique associé à un régulateur électronique
GB2416408B (en) * 2003-10-20 2006-06-07 Gideon Levingston Balance wheel, balance spring and other components and assemblies for a mechanical oscillator system and method of manufacture
GB0324439D0 (en) * 2003-10-20 2003-11-19 Levingston Gideon R Minimal thermal variation and temperature compensating non-magnetic balance wheels and methods of production of these and their associated balance springs
EP1584994B1 (fr) * 2004-04-06 2009-01-21 Nivarox-FAR S.A. Virole sans déformation du rayon de fixation du spiral et procédé de fabrication d'une telle virole

Also Published As

Publication number Publication date
US8240910B2 (en) 2012-08-14
WO2008080570A3 (fr) 2009-02-26
JP2010513886A (ja) 2010-04-30
EP2102717A2 (fr) 2009-09-23
WO2008080570A2 (fr) 2008-07-10
US20100054090A1 (en) 2010-03-04

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