EP4163735A1 - Verfahren zur herstellung und einstellung eines oszillators mit flexibler führung und uhrwerk, das einen solchen oszillator umfasst - Google Patents

Verfahren zur herstellung und einstellung eines oszillators mit flexibler führung und uhrwerk, das einen solchen oszillator umfasst Download PDF

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Publication number
EP4163735A1
EP4163735A1 EP21200973.2A EP21200973A EP4163735A1 EP 4163735 A1 EP4163735 A1 EP 4163735A1 EP 21200973 A EP21200973 A EP 21200973A EP 4163735 A1 EP4163735 A1 EP 4163735A1
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EP
European Patent Office
Prior art keywords
oscillator
flexible
balance
support
flexible guide
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.)
Pending
Application number
EP21200973.2A
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English (en)
French (fr)
Inventor
Etienne THALMANN
Simon Henein
David Chabloz
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.)
Patek Philippe SA Geneve
Original Assignee
Patek Philippe SA Geneve
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 Patek Philippe SA Geneve filed Critical Patek Philippe SA Geneve
Priority to EP21200973.2A priority Critical patent/EP4163735A1/de
Publication of EP4163735A1 publication Critical patent/EP4163735A1/de
Pending 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
    • 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
    • G04B17/20—Compensation of mechanisms for stabilising frequency
    • G04B17/28—Compensation of mechanisms for stabilising frequency for the effect of imbalance of the weights, e.g. tourbillon

Definitions

  • the present invention relates to a method of making and a method of adjusting a flexible-guided oscillator, in particular a flexible-guided oscillator intended to serve as a regulator in a mechanical watch.
  • Flexible-guided oscillators comprise a movable part, called a "balancer", suspended from a support by an arrangement of elastic parts, called a “flexible guide”.
  • the flexible guide guides the oscillations of the pendulum around a virtual axis of rotation - the flexible guide is then a "flexible pivot" - or in a direction of translation, without the aid of physical guide members such as a shaft rotating in bearings or a slide.
  • the flexible guide fulfills the return spring function necessary to obtain oscillatory behavior.
  • the advantages of oscillators with flexible guidance compared to conventional regulators of the balance-spring type are numerous. In particular, they do not generate wear, produce no polluting debris, do not need to be lubricated, present no risk of seizing and can be manufactured monolithically.
  • the present invention aims to remedy this drawback or at least to attenuate it and proposes to this end a method of producing an oscillator with flexible guidance according to claim 1 or according to claim 2, a method of adjusting an oscillator with a flexible guide according to claim 3 and a horological movement with a flexible guided oscillator according to claim 6, particular embodiments being defined in the dependent claims.
  • the present invention plays on the position of the center of mass of the balance relative to the flexible guide in the direction perpendicular to the plane of oscillation to reduce or even cancel the path difference between the horizontal positions and the vertical positions of the oscillator.
  • there are oscillators with flexible guidance in which the center of mass of the balance wheel is outside the median plane of the flexible guidance cf. the patent application EP 2975469 and the patent application EP 3792700 ( figure 8 ).
  • the position of the center of mass of the balance wheel is not chosen therein to reduce the difference in rate between the horizontal positions and the vertical positions.
  • the present invention proposes a simple and effective solution for reducing or even eliminating this variation in rate.
  • a flexible pivot oscillator 1 in three different orientations relative to the force of gravity g, namely respectively a first vertical position, a second vertical position rotated by 90° relative to the first vertical position, and a horizontal position.
  • the oscillator 1 represented comprises a balance wheel 2 which here is of annular shape but which could have another shape, for example the shape of an annular sector.
  • Oscillator 1 further comprises a flexible pivot 3 and a support or base 4 serving to fix oscillator 1 on a fixed or mobile frame, typically on the plate of a watch movement.
  • the flexible pivot 3 is here of the type with a remote center of rotation called “RCC” (Remote Center Compliance). It thus comprises two elastic blades 5 connecting and suspending the balance 2 to the support 4 - the balance 2 is thus held only by the elastic blades 5 -, these two blades 5 not crossing each other but extending along axes which themselves intersect at a point O.
  • the virtual axis of rotation A of the balance 2 with respect to the support 4 is perpendicular to the median plane P of the balance 2 and passes through this crossing point O.
  • the median plane P is also the plane of oscillation of the balance 2. It coincides with the median plane P' of the flexible pivot 3 since it is a flat architecture.
  • the principle of the present invention consists in shifting the center of mass C of the balance 2 along the axis of rotation A with respect to the median plane P' of the flexible pivot 3, for example by shifting the balance 2 and its median plane P and/or by adding or removing material thereto, so as to create out-of-plane bending moments in the blades 5 when the oscillator is in the vertical position, similar to those obtained in the horizontal position.
  • These additional stresses in the blades 5 in the vertical position will affect the angular rigidity of the oscillator and it is possible to find a value of offset of the center of mass C making it possible to make the effect substantially identical in the horizontal and vertical positions.
  • This oscillator 10 comprises, in two different parallel planes, respectively a pendulum 11 and a flexible pivot member 12.
  • the flexible pivot member 12 is preferably monolithic and comprises a support 13, a hub 14 and a flexible pivot 15.
  • the support 13 consists of three fixing parts serving to fix the oscillator 10 on a fixed or mobile frame, typically on the plate of a watch movement.
  • the flexible pivot 15 connects and suspends the hub 14 to the support 13 and guides the hub 14 in rotation with respect to the support 13 around a virtual axis of rotation A.
  • the flexible pivot 15 comprises for this purpose elastic connections connecting in parallel the hub 14 to support 13, each elastic connection comprising, in series, an elastic blade 16, an intermediate rigid part 17 and a pair of parallel elastic blades 18, the intermediate rigid parts 17 being connected in pairs by elastic blades 19.
  • the hub 14 and rocker arm 11 are coaxial and integral in rotation with each other, for example by means of a shaft 20 driven into hub 14. Shaft 20 and rocker arm 11 assembly is only held and guided by the flexible pivot member 12 and its hub 14. The ends of the shaft 20 are therefore not intended to rub against the bearings.
  • the center of mass C of the pendulum 11 is on the virtual axis of rotation A but not in the median plane P' of the flexible pivot 15 and more generally of the flexible pivot member 12.
  • the simulation diagram of the figure 9 represents the diurnal rate, in seconds per day, of the oscillator 10 in the horizontal position and in the vertical position for an amplitude of oscillation of the oscillator 10 tending towards zero, the oscillator 10 being here free, i.e. say not serviced by an exhaust.
  • the diurnal rate In the horizontal position, the diurnal rate is the same for all the orientations of the oscillator but it can differ depending on whether the oscillator is in its position with the pendulum up ( figure 7 ) or in its inverted position with pendulum down, this because the blades 5 may in practice have a more trapezoidal section than rectangular.
  • the horizontal line H in the diagram of the figure 9 represents the diurnal rate in a horizontal position of the oscillator. This daytime walk in a horizontal position is taken as a reference.
  • the diurnal rate In the vertical position, the diurnal rate varies according to the orientation ⁇ of the oscillator 10 with respect to gravity g (cf. figure 8 ).
  • center of mass C of the balance could not be located on the virtual axis of rotation A.
  • the present invention can indeed be combined with the adjustment method set out in the patent application WO 2021/009613 of the applicant, which minimizes the deviations in rate between the different vertical positions by shifting the center of mass with respect to the virtual axis of rotation.
  • the calculated or measured rate can be that of the free oscillator or that of the oscillator maintained by an escapement in a watch movement. It can be a daytime walk, an average daytime walk or an instantaneous walk.
  • the calculated or measured rate can be a rate proper or a quantity, for example a frequency, linked to the rate proper by a mathematical relationship.
  • the difference between the rate in the at least one horizontal position and the rate in the at least one vertical position can be the difference between the mean of the steps in the horizontal positions and the average of the steps in the vertical positions.
  • the step of modifying the position of the center of mass of the balance can be carried out by iteration with each time a step of incrementing or decrementing the position of the center of mass according to the result of the calculation or the measurement of the gait performed in the previous step followed by a step of calculating or measuring (as the case may be) the gait in the horizontal position(s) and in the vertical position(s).
  • the oscillator When the oscillator is integrated into a watch movement, one can take into account the two horizontal positions (up and down) and the four standard vertical positions (“3 o'clock up”, “6 o'clock up”, “9 o'clock up”, “12 o'clock up”) of the movement, and ensure that the gap between the average of the daytime steps in the positions horizontal and the average of the diurnal rates in the vertical positions at the maximum amplitude of oscillation in normal operation (ie when the driving member of the movement is fully armed) is zero.
  • the present invention can be applied to other flexible pivot oscillators than those illustrated in figure 5 And 6 , for example to the oscillators described in the patent applications WO 2020/016131 And EP 3792700 and oscillators with separate crossed blades (cf. for example WO 2018/109584 ).
  • the present invention can be generalized to any oscillator with flexible guidance with plane kinematics, in particular to any oscillator with a single degree of freedom.
  • oscillators based on the principle of the table with parallel blades (cf. figure 14 ) comprising a movable rigid part 22 guided in translation by two parallel blades 23 can be modified so that the center of mass C of the movable rigid part 22 is located outside the plane of the parallel blades 23 so that the effects of out-of-plane loads in vertical positions are similar to the effects of out-of-plane loads in horizontal positions.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
EP21200973.2A 2021-10-05 2021-10-05 Verfahren zur herstellung und einstellung eines oszillators mit flexibler führung und uhrwerk, das einen solchen oszillator umfasst Pending EP4163735A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP21200973.2A EP4163735A1 (de) 2021-10-05 2021-10-05 Verfahren zur herstellung und einstellung eines oszillators mit flexibler führung und uhrwerk, das einen solchen oszillator umfasst

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP21200973.2A EP4163735A1 (de) 2021-10-05 2021-10-05 Verfahren zur herstellung und einstellung eines oszillators mit flexibler führung und uhrwerk, das einen solchen oszillator umfasst

Publications (1)

Publication Number Publication Date
EP4163735A1 true EP4163735A1 (de) 2023-04-12

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EP21200973.2A Pending EP4163735A1 (de) 2021-10-05 2021-10-05 Verfahren zur herstellung und einstellung eines oszillators mit flexibler führung und uhrwerk, das einen solchen oszillator umfasst

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2273323A2 (de) * 2009-07-10 2011-01-12 Manufacture et fabrique de montres et chronomètres Ulysse Nardin Le Locle SA Mechanischer Oszillator
EP2975469A1 (de) 2014-07-14 2016-01-20 Nivarox-FAR S.A. Biegsamer Führungsdraht für Uhrwerke
WO2018109584A1 (fr) 2016-12-16 2018-06-21 Patek Philippe Sa Geneve Composant horloger a pivot flexible
WO2020016131A1 (en) 2018-07-16 2020-01-23 Patek Philippe Sa Geneve Flexure pivot oscillator insensitive to gravity
WO2021009613A1 (fr) 2019-07-12 2021-01-21 Patek Philippe Sa Geneve Procede de reglage d'un oscillateur horloger a pivot flexible
EP3792700A1 (de) 2019-09-16 2021-03-17 Patek Philippe SA Genève Oszillator einer uhr mit flexiblem zapfen

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2273323A2 (de) * 2009-07-10 2011-01-12 Manufacture et fabrique de montres et chronomètres Ulysse Nardin Le Locle SA Mechanischer Oszillator
EP2975469A1 (de) 2014-07-14 2016-01-20 Nivarox-FAR S.A. Biegsamer Führungsdraht für Uhrwerke
WO2018109584A1 (fr) 2016-12-16 2018-06-21 Patek Philippe Sa Geneve Composant horloger a pivot flexible
WO2020016131A1 (en) 2018-07-16 2020-01-23 Patek Philippe Sa Geneve Flexure pivot oscillator insensitive to gravity
WO2021009613A1 (fr) 2019-07-12 2021-01-21 Patek Philippe Sa Geneve Procede de reglage d'un oscillateur horloger a pivot flexible
EP3792700A1 (de) 2019-09-16 2021-03-17 Patek Philippe SA Genève Oszillator einer uhr mit flexiblem zapfen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"Flexure Pivot Oscillators for Mechanical Watches", 18 June 2020, article ETIENNE F. G. THALMANN: "Flexure Pivot Oscillators for Mechanical Watches", XP055731304, DOI: 10.5075/epfl-thesis-8802 *

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