EP3336613A1 - Resonator für uhr, der zwei pendellager umfasst, die so angeordnet sind, dass sie auf derselben ebene schwingen können - Google Patents

Resonator für uhr, der zwei pendellager umfasst, die so angeordnet sind, dass sie auf derselben ebene schwingen können Download PDF

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Publication number
EP3336613A1
EP3336613A1 EP16204580.1A EP16204580A EP3336613A1 EP 3336613 A1 EP3336613 A1 EP 3336613A1 EP 16204580 A EP16204580 A EP 16204580A EP 3336613 A1 EP3336613 A1 EP 3336613A1
Authority
EP
European Patent Office
Prior art keywords
rockers
elastic
plane
blades
pivoting
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.)
Granted
Application number
EP16204580.1A
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English (en)
French (fr)
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EP3336613B1 (de
Inventor
Dara Bayat
Yves Pétremand
Ivar Kjelberg
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.)
ASSOCIATION SUISSE POUR LA RECHERCHE HORLOGERE
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ASSOCIATION SUISSE POUR LA RECHERCHE HORLOGERE
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 ASSOCIATION SUISSE POUR LA RECHERCHE HORLOGERE filed Critical ASSOCIATION SUISSE POUR LA RECHERCHE HORLOGERE
Priority to EP16204580.1A priority Critical patent/EP3336613B1/de
Priority to US16/469,935 priority patent/US11422506B2/en
Priority to PCT/IB2017/057199 priority patent/WO2018109583A1/fr
Priority to CN201780078151.0A priority patent/CN110214294B/zh
Priority to JP2019554039A priority patent/JP7053658B2/ja
Publication of EP3336613A1 publication Critical patent/EP3336613A1/de
Application granted granted Critical
Publication of EP3336613B1 publication Critical patent/EP3336613B1/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
    • G04B17/045—Oscillators acting by spring tension with oscillating blade springs
    • 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
    • G04B17/06—Oscillators with hairsprings, e.g. balance
    • G04B17/063—Balance construction

Definitions

  • the present invention relates to a resonator for a timepiece comprising a support structure intended to allow the mounting of the resonator in a timepiece, two rockers arranged to oscillate in the same plane, and a plurality of elastic elements arranged to connect the two rockers to the support structure, the configuration of the plurality of elastic elements determining two parallel axes of elastic pivoting for the two rockers, and the plurality of elastic elements also forming elastic return means arranged to angularly return each of two rockers to a rest position.
  • a sprung balance usually use as a regulating member a sprung balance.
  • the latter is composed of three main parts: a rocker in the form of a flywheel, an axis that carries the balance and which is terminated by two pivots for mounting the balance in a timepiece frame, and finally, a spiral spring which produces a return torque proportional to the size of the angle between the balance of its equilibrium position.
  • the sprung balance is the almost exclusive time base of mechanical watches for more than 300 years.
  • the amplitude of the oscillations of a spiral balance is considerable. It usually varies between 180 ° and 315 ° depending on the degree of winding of the mainspring and according to the rather horizontal or rather vertical position of the watch. Under these conditions, the two bearings in which the axis of the balance wheel rotates are very stressed, which causes the dissipation of a fraction of the energy of the balance by friction. It will be understood that this friction contributes to lowering the quality factor of the sprung balance. Great efforts have been made to provide balance bearings with optimized tribological properties. Nevertheless, the negative effect of friction on the quality factor has not yet been eliminated.
  • the patent document CH 709 291 A2 discloses a timepiece resonator comprising a support element, intended to allow the mounting of the resonator in a timepiece, a balance wheel in the form of a flywheel, and finally two elastic blades that connect the pendulum support member while crossing.
  • the configuration of the two elastic blades is chosen so as to define a geometric pivot axis concentric with the balance.
  • the two blades are arranged to exert a restoring torque on the balance.
  • the solution proposed in this prior document eliminates one of the main causes of friction, since it removes the bearings of the balance to replace them with a flexible pivoting.
  • the proposed oscillator has a quality factor about 10 times higher than that of a sprung balance.
  • the coupling between the two resonators is provided by a movable connecting element to which the elastic blades of the two resonators are fixed by one end. The other end of each pair of blades is connected to one of the two rockers as before.
  • the connecting element carries the two rockers, while being itself resiliently fixed on a support member rigidly mounted in the timepiece. With such an arrangement, the geometric axes of pivoting of the two rockers each occupy a fixed position relative to the connecting element, while being movable collectively relative to the frame of the timepiece.
  • the oscillator he describes is a form of tuning fork.
  • a benefit related to the symmetry of tuning forks is that it favors some well-defined oscillation modes having a high quality factor.
  • the two most fundamental modes are the symmetrical mode and the antisymmetric mode.
  • the antisymmetrical mode (the tuning fork legs move at the same time in opposite directions) is the most advantageous because of its lower sensitivity to external phenomena; in particular shocks.
  • the symmetrical oscillation mode (the tuning fork branches move at the same time in the same direction) is always effectively damped.
  • the document EP 3,035,127 A1 teaches to couple the oscillations of the two rockers by using a connecting element suspended elastically on a fixed element.
  • a peculiarity of the antisymmetric resonance mode is that the center of mass of the system remains at rest, the forces acting on the link element of the tuning fork mutually neutralizing each other.
  • the suspension of the connecting element must be adjusted so that the vibrations of this element are strongly damped, while ensuring that the connecting element remains free of transmitting to the second balance the excitation pulses received on the first balance.
  • An object of the present invention is to provide a resonator with a high quality factor, and which comprises two rockers mechanically coupled, the coupling between the rockers being designed to promote the antisymmetric oscillation mode.
  • the invention achieves this goal by providing a resonator according to the appended claim 1.
  • the term "support structure” does not necessarily mean a single support piece. Indeed, according to the invention, the support structure may for example comprise two separate support members, one of the support members for mounting the first beam and the other support member for mounting the second beam.
  • the figure 1 is a top plan view of a timepiece resonator, which is in accordance with a particular embodiment of the invention.
  • the illustrated resonator comprises a support structure intended to allow its mounting on a frame (not shown) of a mechanical watch.
  • the support structure consists of two flanges respectively referenced 2 and 4.
  • the resonator further comprises two generally referenced balances 6 and 8 which, in the illustrated example, generally have the shape of an ellipse with a large central notch.
  • the two notches open opposite one another. It can be seen further that the two flanges 2, 4 of the support structure are each arranged inside one of the notches.
  • Each beam further comprises a serge 10 provided to give it greater inertia.
  • the serge extends along the periphery of the pendulum.
  • the first and second pendulums preferably have the same mass and the same dimensions so that it is easy to oscillate at the same frequency.
  • each rocker 6, 8 is connected to one of the two flanges 2, 4 by a pair of resilient blades (referenced respectively 12a, 12b and 14a, 14b).
  • one end of each blade is attached to the rocker by the bottom of the notch, while the other end is secured to the flange in the same notch, so that each pair of resilient blades is arranged inside the notch of the pendulum to which it is attached.
  • the two elastic blades of the same pair intersect so as to form a X which extends in the plane of the pendulum inside the notch.
  • the configuration of the pair of blades connecting one of the rockers to the support structure determines an axis of elastic pivoting X ', X "for this rocker. perpendicular to the plane of the pendulum and it passes through the point of intersection of the two blades of the X. This point of intersection moves very slightly during the movement of the pendulums.
  • the formed X by the resilient blades is preferably positioned in the notch so that the intersection of the geometric axis of pivoting with the plane of the balance coincides with the center of mass of the balance.
  • the figure 1 shows again that the two elastic blades 12a, 12b or 14a, 14b which form the X have their junction point halfway between their two ends. Simulations show that the configuration in which the two blades of the X-shaped structure intersect in the middle, provides a clean and frictionless rotation around the geometric axis of pivoting.
  • such a flexible X pivot has the advantageous characteristic of producing a return torque proportional to the magnitude of the angle between the balance of its equilibrium position, and that in one direction as in the other.
  • the term "clean rotation” used above refers to a rotation that minimizes the displacement of the pivot axis.
  • the height of the blades corresponds to their extension perpendicular to the plane of the balance, while their thickness corresponds to their extension in the plane of the balance, perpendicular to their length.
  • the thickness of the blades is preferably reduced so as to give the elastic blades sufficient flexibility in the plane of the beam.
  • the height blades is determined so as to give them sufficient rigidity to contain oscillations of the balance in the same determined plane.
  • the two pairs of blades are preferably made of the same material.
  • the two flexible X pivots preferably have identical dimensions so that the first and the second pendulum have the same fundamental frequency of resonance when they have the same mass and the same moment. inertia.
  • FIGS. 2A and 2B are enlarged partial views showing a second and third configuration variant of the pair of resilient blades connecting one of the rockers to the support structure of the resonator of the invention. Comparing the Figures 1, 2A and 2B it can be observed in particular that these figures are distinguished by the value of the angle between the two resilient strips coming from one of the flanges 4, 4 'or 4 ". figure 1 , this angle is substantially equal to 90 °, in the Figure 2A , it is substantially less than 90 °, and finally in the Figure 2B it is substantially larger than 90 °.
  • the angle at which the blades intersect has an impact on the excitability of some out-of-plane oscillation modes of the pendulums. These higher modes are undesirable for most horological applications of the resonator of the invention. In practice we will choose the angle between the elastic blades according to the shape of the rockers and the desired stiffnesses according to the different plans.
  • the resonator further comprises a flexible blade 16 which constitutes a strap arranged to couple the first and the second beam 6 and 8.
  • the flexible blade is attached to the first and second pendulums, the junctions, respectively 16a and 16b, of the flexible blade with the first and the second balance are located in the same plane parallel to the plane of oscillation of the two rockers and are symmetrical to each other with respect to the point central figure (referenced O).
  • the point central figure referenced O
  • the shape of the blade 16 has a central symmetry about the central point O. It will be understood however that this characteristic is only present when the rockers 6, 8 are in their position. rest position.
  • the center of symmetry O is located halfway between the geometric pivot axes of the two rockers.
  • the figure 1 still shows a line d which passes through the center O and through the junctions 16a, 16b of the flexible blade 16 with the two rockers 6, 8.
  • the line d is at an angle ⁇ of at least 30 ° , or at least 45 °, with the plane containing the first and the second geometric axis of pivoting.
  • the first and the second pendulum have the same fundamental resonance frequency. Because of the presence of the shoulder strap 16, when one of the rockers deviates from its equilibrium position by pulling the strap after him, the other rocker is forced to follow the movement away from its position. balance in the other direction. In particular, referring to the figure 1 it can be understood that if the first rocker 6 pivots in the clockwise direction, it exerts traction on the shoulder strap 16. The inertia of the shoulder strap being very small compared to that of the rockers, the tension at which the shoulder strap is subjected is echoes on the second balance 8 at the junction 16b. The second pendulum thus undergoes a torque that tends to rotate it counterclockwise.
  • the two balances deform the elastic blades X 12a, 12b, 14a, 14b which connect them to the support structure (the flanges 2 and 4).
  • the deformation of the two pairs of elastic blades generates two return couples which are exerted respectively on the first and the second beam.
  • the presence of the strap 16 has the effect of synchronizing the oscillations of the two rockers. It may also be noted in passing that the oscillations of the two rockers coupled to the resonance frequency are said to be antisynchronous, and not simply synchronous, when the oscillations occur in an antisymmetric mode in accordance with what has just been described.
  • FIGS 3 and 4 are perspective views of a resonator for a timepiece according to a second particular embodiment of the invention.
  • the resonator illustrated in the Figures 3 and 4 is very similar to the resonator of the figure 1 .
  • the resonator comprises a pair of straps 116, 118 attached to each other at mid-length by a rigid coupling element 120.
  • the straps 116, 118 are also each attached to the first and second pendulums 6 and 8.
  • one half of the shoulder strap 116 which extends between the first beam 6 and the coupling element 120, is designated 116 ', and the other half of the shoulder strap 116, which is extends between the coupling element and the second rocker 8, by the reference 116.
  • one half of the shoulder strap 118 located between the first rocker and the coupling element, has been designated by the reference 118 ', and the other half by the reference 118 ".
  • the pair of shoulder straps 116, 118 is mainly constituted by a first flexible blade attached to the first rocker 6 by its two ends, and by a second flexible blade attached to the second rocker 8 by its two ends. It can be seen that the two flexible blades are further connected to one another via the coupling element 120. The two flexible blades are connected to the coupling element in their middle, and it will be understood that that in the construction shown, the two halves of the first flexible blade respectively constitute the half 116 'of the shoulder strap 116 and the half 118' of the shoulder strap 118. Similarly, the two halves of the second flexible blade respectively constitute the other half 116 "of the ramp 116 and the other half 118" of the ramp 118.
  • the coupling element 120 is rigid and is arranged to connect rigidly a central portion of the first flexible blade and a central portion of the second flexible blade, so that these two central portions are kept spaced and parallel to each other.
  • An advantage of the second embodiment which has just been described is its highly symmetrical character which gives even more stability to the antisymmetric oscillation mode of the resonator.
  • Another advantage is that the vibrations of the balance at resonance translate into a back and forth movement of the rigid coupling element 120 along a rectilinear path in the plane of symmetry of the resonator (the mediating plane m already mentioned). .
  • the fact of having a part performing a back and forth along a rectilinear trajectory could in particular be used to associate an exhaust with the resonator.
  • each beam 6, 8 is located on the underside of the balance. She can however, alternatively, be located on the upper side or both sides of the balance.
  • the resonator according to the invention can be made in one piece of silicon and / or silicon oxide, diamond, quartz or metal, for example.
  • techniques of the DRIE or LIGA type may be employed.
  • the resonator according to the invention can also be obtained by an assembly of parts.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
  • Electric Clocks (AREA)
  • Micromachines (AREA)
EP16204580.1A 2016-12-16 2016-12-16 Resonator für uhr, der zwei pendellager umfasst, die so angeordnet sind, dass sie auf derselben ebene schwingen können Active EP3336613B1 (de)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP16204580.1A EP3336613B1 (de) 2016-12-16 2016-12-16 Resonator für uhr, der zwei pendellager umfasst, die so angeordnet sind, dass sie auf derselben ebene schwingen können
US16/469,935 US11422506B2 (en) 2016-12-16 2017-11-17 Resonator for a timepiece comprising two balances arranged to oscillate in the same plane
PCT/IB2017/057199 WO2018109583A1 (fr) 2016-12-16 2017-11-17 Resonateur pour piece d'horlogerie comportant deux balanciers agences pour osciller dans un meme plan
CN201780078151.0A CN110214294B (zh) 2016-12-16 2017-11-17 用于包括两个设置成在相同平面内振荡的摆轮的计时器的谐振器
JP2019554039A JP7053658B2 (ja) 2016-12-16 2017-11-17 同一平面において振動するように配置された２つのバランスを含むタイムピース用の共振器

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP16204580.1A EP3336613B1 (de) 2016-12-16 2016-12-16 Resonator für uhr, der zwei pendellager umfasst, die so angeordnet sind, dass sie auf derselben ebene schwingen können

Publications (2)

Publication Number Publication Date
EP3336613A1 true EP3336613A1 (de) 2018-06-20
EP3336613B1 EP3336613B1 (de) 2020-03-11

Family

ID=57570351

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Application Number Title Priority Date Filing Date
EP16204580.1A Active EP3336613B1 (de) 2016-12-16 2016-12-16 Resonator für uhr, der zwei pendellager umfasst, die so angeordnet sind, dass sie auf derselben ebene schwingen können

Country Status (5)

Country Link
US (1) US11422506B2 (de)
EP (1) EP3336613B1 (de)
JP (1) JP7053658B2 (de)
CN (1) CN110214294B (de)
WO (1) WO2018109583A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3822711A1 (de) * 2019-11-12 2021-05-19 Patek Philippe SA Genève Uhrwerkmechanismus, der eine mit einer angetriebenen feder zusammenwirkende treibende feder umfasst

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3812842B1 (de) * 2019-10-24 2023-11-29 The Swatch Group Research and Development Ltd Schwenkbare führungsvorrichtung für eine schwenkbare masse, und resonatormechanismus einer uhr
CN112903477B (zh) * 2021-01-25 2022-08-26 华东交通大学 一种测定及计算颗粒材料系统剪切强度的方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1539670A (fr) * 1967-05-05 1968-09-20 Ct Tech De L Ind Horlogere Oscillateur mécanique de précision
US3520127A (en) * 1967-08-02 1970-07-14 Hans Meyer Spring action oscillator
CH709291A2 (fr) 2014-02-20 2015-08-28 Suisse Electronique Microtech Oscillateur de pièce d'horlogerie.
CH710115A2 (fr) * 2014-09-09 2016-03-15 Swatch Group Res & Dev Ltd Mobile coupleur pour la synchronisation de résonateurs d'horlogerie de même fréquence.
EP3035127A1 (de) 2014-12-18 2016-06-22 The Swatch Group Research and Development Ltd. Stimmgabeloszillator einer stimmgabelgesteuerten Uhr

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JPS4624311Y1 (de) * 1968-03-12 1971-08-21
CH698837B1 (fr) * 2003-02-06 2009-11-13 Eta Sa Mft Horlogere Suisse Spiral de résonateur balancier-spiral et son procédé de fabrication.
DE60331447D1 (de) * 2003-12-16 2010-04-08 Montres Breguet Sa Chronometerhemmung für Uhren
JP4624311B2 (ja) 2006-06-26 2011-02-02 花王株式会社 電子写真用トナー
DE602008006057D1 (de) 2008-07-04 2011-05-19 Swatch Group Res & Dev Ltd Gekoppelte Resonatoren für Uhr
CH700747B1 (fr) 2009-04-09 2014-07-31 Rudis Sylva S A Oscillateur mécanique pour mouvement horloger.
HK1146455A2 (en) 2010-03-12 2011-06-03 Microtechne Res & Dev Ct Ltd An oscillator system
EP2574994A1 (de) * 2011-09-29 2013-04-03 Asgalium Unitec SA Stimmgabelresonator für ein mechanisches Uhrwerk
EP2831677B1 (de) * 2012-03-29 2016-05-25 Nivarox-FAR S.A. Flexibler uhrhemmungsmechanismus
EP2874023A1 (de) * 2013-11-13 2015-05-20 ETA SA Manufacture Horlogère Suisse Uhr, die eine Entkoppelung zwischen den Energieübertragungsmitteln und den Zeitzählmitteln umfasst
EP2998800B1 (de) 2014-09-16 2019-01-16 Patek Philippe SA Genève Uhrkomponente mit flexiblem zapfenlager
EP3001257B1 (de) * 2014-09-26 2018-01-17 ETA SA Manufacture Horlogère Suisse Achsparalleler und isochroner Resonator einer Uhr
CN106662839B (zh) 2015-02-03 2019-03-29 Eta瑞士钟表制造股份有限公司 等时钟表谐振器
EP3054357A1 (de) * 2015-02-03 2016-08-10 ETA SA Manufacture Horlogère Suisse Oszillatormechanismus für Uhr
CH710691A2 (fr) 2015-02-03 2016-08-15 Eta Sa Mft Horlogere Suisse Résonateur isochrone d'horlogerie.
EP3128380B1 (de) * 2015-08-04 2018-11-21 ETA SA Manufacture Horlogère Suisse Uhreinstellmechanismus mit magnetisch synchronisierten dreharmen

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1539670A (fr) * 1967-05-05 1968-09-20 Ct Tech De L Ind Horlogere Oscillateur mécanique de précision
US3520127A (en) * 1967-08-02 1970-07-14 Hans Meyer Spring action oscillator
CH709291A2 (fr) 2014-02-20 2015-08-28 Suisse Electronique Microtech Oscillateur de pièce d'horlogerie.
CH710115A2 (fr) * 2014-09-09 2016-03-15 Swatch Group Res & Dev Ltd Mobile coupleur pour la synchronisation de résonateurs d'horlogerie de même fréquence.
EP3035127A1 (de) 2014-12-18 2016-06-22 The Swatch Group Research and Development Ltd. Stimmgabeloszillator einer stimmgabelgesteuerten Uhr

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3822711A1 (de) * 2019-11-12 2021-05-19 Patek Philippe SA Genève Uhrwerkmechanismus, der eine mit einer angetriebenen feder zusammenwirkende treibende feder umfasst

Also Published As

Publication number Publication date
CN110214294A (zh) 2019-09-06
CN110214294B (zh) 2020-10-30
WO2018109583A1 (fr) 2018-06-21
US20200081401A1 (en) 2020-03-12
US11422506B2 (en) 2022-08-23
JP2020502547A (ja) 2020-01-23
EP3336613B1 (de) 2020-03-11
JP7053658B2 (ja) 2022-04-12

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