EP4286959B1 - Oszillator einer uhr mit flexiblem zapfen - Google Patents

Oszillator einer uhr mit flexiblem zapfen Download PDF

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Publication number
EP4286959B1
EP4286959B1 EP22176929.2A EP22176929A EP4286959B1 EP 4286959 B1 EP4286959 B1 EP 4286959B1 EP 22176929 A EP22176929 A EP 22176929A EP 4286959 B1 EP4286959 B1 EP 4286959B1
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EP
European Patent Office
Prior art keywords
oscillator
timepiece
balance
escapement
rotation
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.)
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EP22176929.2A
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English (en)
French (fr)
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EP4286959A1 (de
Inventor
David Chabloz
Michael MILLIER
Pascal Perron
Mathieu MARANGÉ
Anthony Krüttli
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
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Patek Philippe SA Geneve
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Application filed by Patek Philippe SA Geneve filed Critical Patek Philippe SA Geneve
Priority to EP22176929.2A priority Critical patent/EP4286959B1/de
Publication of EP4286959A1 publication Critical patent/EP4286959A1/de
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Publication of EP4286959B1 publication Critical patent/EP4286959B1/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
    • G04B15/00—Escapements
    • G04B15/06—Free escapements
    • 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

Definitions

  • the present invention relates to a flexible pivot oscillator intended to serve as a time base in a clock mechanism.
  • a flexible pivot oscillator is an oscillator whose oscillating member (balance) is guided in rotation by an arrangement of elastic parts and not by a physical axis of rotation sliding in bearings. In addition to its rotational guiding function, the flexible pivot exerts a restoring torque on the oscillating member in the same way as the balance spring of a balance-spring oscillator.
  • a flexible pivot oscillator does not produce dry friction during operation. It therefore has a better quality factor.
  • the present invention relates more particularly to a flexible pivot oscillator whose arrangement of elastic parts comprises blades extending in different parallel planes, typically so-called separate crossed blades which cross in top view without touching.
  • Such watch oscillators are described for example in patent applications EP 2911012 , EP 2998800 , EP 3382470 , EP 3839651 , EP 3410229 , EP 3502784 , US 2020/0033804 , WO 2016/096677 , WO 2017/055983 , WO 2018/109584 And WO 2022/009102 .
  • An aim of the present invention is to improve the isochronism of such clock oscillators.
  • the present invention further provides a watch regulating device and a timepiece comprising such a watch oscillator.
  • FIG 1 shows a 100-blade clock oscillator with separate crossed blades as described in the patent application WO 2022/009102 of the present applicant. It comprises in particular a support 1, a balance 2, a flexible pivot 3 connecting the balance 2 to the support 1 and an impulse pin 4 secured to the balance 2.
  • the support 1 is intended to be mounted on a fixed or mobile frame of a watch mechanism.
  • the flexible pivot 3 comprises first and second elastic blades 5, 6 that are identical but extend in parallel planes and in different directions to cross without contact. The crossing of the blades 5, 6 defines a virtual axis of rotation A of the balance 2 relative to the support 1, an axis of rotation that is perpendicular to said parallel planes and to the plane of the balance 2.
  • the flexible pivot 3 thus serves to suspend the balance 2 from the support 1, to guide the balance 2 in rotation relative to the support 1 around the virtual axis of rotation A and to exert on the balance 2 an elastic return torque tending to bring it back into an equilibrium position relative to the support 1.
  • the impulse pin 4 is intended to receive impulses from a escapement fork and transmit them to balance wheel 2 to maintain the latter's oscillations.
  • FIG. 2 shows, by graph G1, an isochronism curve of the oscillator 100.
  • the ordinate is plotted for the rate in seconds per day and the abscissa is plotted for the oscillation amplitude of the balance in degrees.
  • This graph G1 indicates more precisely the rate values measured during oscillations of the oscillator 100 maintained by a conventional escapement, in this case a Swiss lever escapement.
  • a significant isochronism defect appears in a zone Z, namely a pronounced drop in the rate followed by a rapid rise. In the example illustrated, this defect occurs around an amplitude A 0 between 23° and 24°.
  • Such a defect significantly affects the accuracy of the time measurement and may require operating the oscillator in an amplitude range disjoint from the Z zone.
  • This defect can be explained by a resonance phenomenon due to the excitation of a parasitic mode of pitching of the balance.
  • the balance oscillates out of its plane around a Y axis which intersects the A axis perpendicularly.
  • the impulse pin in the present invention is arranged so that its functional area, intended to be in contact with the escapement fork, crosses the plane of symmetry of the median planes of the blades 5, 6 perpendicular to the axis A. In this way, there is no longer, or almost no longer, a lever arm between the pitch axis Y and the interaction area between the oscillator and the escapement and the resonance phenomenon mentioned above is eliminated or attenuated.
  • the invention proposes a 100' clock oscillator (cf. Figures 3 and 4 ) which differs from oscillator 100 in that the functional area of the impulse pin 4' crosses the plane P3 of symmetry of the median plane P1, perpendicular to the axis A, of the blade 5 and of the median plane P2, perpendicular to the axis A, of the blade 6.
  • the escapement fork 7, located at the same height as the functional zone of the impulse pin 4', is part of an anchor 8 and is raised relative to the body 9 of the anchor 8 to allow said body to extend in a plane different from that of the felloe, 10, of the balance 2 and thus avoid any risk of collision between the anchor 8 and the balance 2 during operation of the oscillator.
  • the G2 graph of the figure 2 shows the results of the walking measurement obtained with the 100' oscillator. It can be seen that the isochronism defect mentioned above has disappeared, which makes it possible to choose an amplitude range for the operation of the oscillator independently of the parasitic frequencies.
  • the 100' oscillator as shown in Figures 3 and 4 is formed of an assembly of stacked parts, namely a lower part 11, an upper part 12 and, between the two, the balance 2.
  • the lower part 11 comprises a lower stage 13 of the support 1, the elastic blade 6 and a lower arm 14 connected to the lower stage 13 of the support 1 by the elastic blade 6.
  • the upper part 12 comprises an upper stage 15 of the support 1, the elastic blade 5 and an upper arm 16 connected to the upper stage 15 of the support 1 by the elastic blade 5.
  • the balance 2 comprises a diametrical arm 17 interrupted in its central part so as not to interfere with the elastic blades 5, 6. This diametrical arm 17 is assembled to the lower and upper arms 14, 16 and serves as a spacer for the latter.
  • Each of the lower and upper parts 11, 12 is monolithic and made for example of silicon, possibly coated with a layer, for example a layer of silicon oxide.
  • the balance 2 is typically made of a dense material such as beryllium copper, gold, platinum, nickel silver or other dense metal or alloy.
  • the lower and upper stages 13, 15 of the support 1 are superimposed while being separated by a spacer 18, for example metallic.
  • the parts 2, 11, 12 and 18 are assembled by pins 19.
  • a lower stop member 20 on the lower face of the lower arm 14, intended to cooperate in the event of an impact with a stop fixed relative to the support 1 to protect the elastic blades 5, 6, carries the impulse pin 4' which extends parallel to the axis A.
  • this impulse pin 4' could be carried by a member other than the lower stop member 20 and could be in another form.
  • FIGS. 5 and 6 show a 100" clock oscillator according to a second embodiment of the invention.
  • the impulse pin is replaced by a 4" impulse finger in one piece with the balance 2, therefore typically metallic, located in the same plane as the diametrical arm 17 and projecting radially from the two segments of the diametrical arm 17.
  • FIGS. 7 and 8 illustrate a 100′′′ timepiece oscillator according to a third embodiment of the invention.
  • this third embodiment there is no spacer between the lower and upper parts 11, 12 and the balance 2 is located above the stack of the lower and upper arms 14, 16.
  • a finger 4′′′ formed by the superposition of two single-piece elementary fingers with the lower and upper arms 14, 16 respectively and projecting radially from these arms constitutes the impulse element which cooperates with the escapement fork 7.
  • the impulse finger 4′′′ is typically made of silicon, possibly coated with a layer, for example a layer of silicon oxide.
  • the functional zone of the impulse finger 4'" crosses the plane P3 of symmetry of the median planes P1 and P2 blades 5, 6 and is even centered relative to this plane P3, as visible on the figure 8 .
  • the present invention applies more generally to any type of flexible pivot watch oscillator comprising elastic blades extending in different parallel planes.
  • Other examples than separate crossed blades are non-coplanar RCC (Remote Center Compliance) blades.
  • the present invention is also not limited to two elastic blades.
  • the flexible pivot comprises more than two blades extending in different parallel planes, for example three or four blades
  • the functional zone of the impulse element crosses the plane of symmetry of all the median planes of the blades, this plane of symmetry being able to be one of the median planes of the blades (for example in the case of three blades) or a plane which separates one half of the blades from the other half of the blades (for example in the case of four blades).
  • Examples of flexible pivots with multiple blades to which the invention can be applied are described in the documents EP 2998800 , EP 2911012 , EP 3382470 , EP 3410229 And US 2020/0033804 .
  • the balance wheel 2 preferably has an annular 10 rim, as shown in the figures 3 , 5 And 7 , in order to maximize the inertia to mass ratio, but its rim could have any other desired shape, for example that of one or more segments, annular or not.
  • the escapement organ which cooperates with the impulse element 4', 4", 4′′′ is not necessarily an anchor. It can be a wheel escapement, especially in the case of a direct impulse escapement, a lever or other.
  • the clock oscillator according to the invention can equip a timepiece such as a watch, in particular a wristwatch, or a clock.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Clocks (AREA)

Claims (11)

  1. Oszillator (100'; 100"; 100‴) einer Uhr, der eine Stütze (1), eine Unruh (2) und einen flexiblen Zapfen (3) zum drehbaren Führen der Unruh (2) in Bezug auf die Stütze (1) um eine virtuelle Drehachse (A) und zum Ausüben eines Rückstellmoments auf die Unruh (2) umfasst, wobei der flexible Zapfen (3) elastische Klingen (5, 6) umfasst, die jeweils unterschiedliche Mittelebenen (P1, P2) senkrecht zur virtuellen Drehachse (A) aufweisen, wobei die Gesamtheit der Mittelebenen (P1, P2) in Bezug auf eine Symmetrieebene (P3) symmetrisch ist, wobei der Oszillator (100'; 100"; 100‴) ferner ein Impulselement (4'; 4"; 4‴) umfasst, das fest mit der Unruh (2) verbunden ist und dazu bestimmt ist, mit einem Hemmungsorgan (8) zusammenzuwirken, dadurch gekennzeichnet, dass der Funktionsbereich des Impulselements (4'; 4"; 4‴), der dazu bestimmt ist, mit dem Hemmungsorgan (8) in Kontakt zu sein, die Symmetrieebene (P3) durchquert.
  2. Oszillator einer Uhr nach Anspruch 1, dadurch gekennzeichnet, dass der Funktionsbereich des Impulselements (4"; 4‴) in Bezug auf die Symmetrieebene (P3) zentriert ist.
  3. Oszillator einer Uhr nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Unruh (2) einen ringförmigen Fußkreis (10) umfasst.
  4. Oszillator einer Uhr nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass das Impulselement (4') ein Stift ist, der sich parallel zur virtuellen Drehachse (A) erstreckt.
  5. Oszillator einer Uhr nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass das Impulselement (4"; 4‴) ein Finger ist, der sich in Bezug auf die virtuelle Drehachse (A) radial erstreckt.
  6. Oszillator einer Uhr nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die elastischen Klingen (5, 6) eine erste und eine zweite gekreuzte elastische Klinge umfassen.
  7. Oszillator einer Uhr nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass der flexible Zapfen (3) aus zwei gekreuzten elastischen Klingen (5, 6) besteht.
  8. Reguliervorrichtung einer Uhr, die einen Oszillator (100'; 100"; 100‴) einer Uhr nach einem der Ansprüche 1 bis 7 und ein Hemmungsorgan (8) umfasst, das mit dem Funktionsbereich des Impulselements (4'; 4"; 4‴) zusammenwirkt.
  9. Reguliervorrichtung einer Uhr nach Anspruch 8, dadurch gekennzeichnet, dass das Hemmungsorgan (8) eine Hemmungsgabel (7) umfasst, die mit dem Funktionsbereich des Impulselements (4'; 4"; 4‴) zusammenwirkt.
  10. Reguliervorrichtung einer Uhr nach Anspruch 9, dadurch gekennzeichnet, dass das Hemmungsorgan (8) ein Anker ist, der einen Körper (9) und die Hemmungsgabel (7) umfasst, und dadurch, dass die Hemmungsgabel (7) in Bezug auf den Körper (9) hochliegend ist.
  11. Uhr, zum Beispiel tragbare Uhr oder Pendulette, die einen Oszillator einer Uhr nach einem der Ansprüche 1 bis 7 oder eine Reguliervorrichtung einer Uhr nach einem der Ansprüche 8 bis 10 umfasst.
EP22176929.2A 2022-06-02 2022-06-02 Oszillator einer uhr mit flexiblem zapfen Active EP4286959B1 (de)

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EP22176929.2A EP4286959B1 (de) 2022-06-02 2022-06-02 Oszillator einer uhr mit flexiblem zapfen

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EP4286959A1 EP4286959A1 (de) 2023-12-06
EP4286959B1 true EP4286959B1 (de) 2024-12-11

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Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE201823C (de) * 1907-12-22 1908-09-17 Lagerung für wippen für uhrhemmungen
CH709291A2 (fr) 2014-02-20 2015-08-28 Suisse Electronique Microtech Oscillateur de pièce d'horlogerie.
EP3457221B1 (de) 2014-09-16 2022-08-10 Patek Philippe SA Genève Oszillator einer uhr mit flexiblem zapfen
EP3035126B1 (de) 2014-12-18 2017-12-13 The Swatch Group Research and Development Ltd. Resonator einer Uhr mit sich kreuzenden Blättern
CN108138837B (zh) 2015-09-29 2020-10-27 百达翡丽日内瓦公司 柔性枢轴机械部件以及包括该部件的钟表设备
CH712958B1 (fr) * 2016-09-27 2021-01-15 Csem Ct Suisse Delectronique Microtechnique Sa Rech Developpement Elément oscillant et oscillateur mécanique horloger comprenant un tel élément oscillant.
EP3555708B1 (de) 2016-12-16 2021-03-03 Patek Philippe SA Genève Uhrkomponente mit flexiblem zapfen
EP3382470B1 (de) 2017-03-29 2020-05-06 Patek Philippe SA Genève Oszillator einer uhr mit flexiblem zapfen
EP3410229B1 (de) 2017-05-30 2021-07-14 Patek Philippe SA Genève Uhrkomponente mit flexiblem zapfen
EP3502784B1 (de) 2017-12-22 2020-06-10 Patek Philippe SA Genève Uhrresonator mit flexibler führung
US11454932B2 (en) 2018-07-24 2022-09-27 The Swatch Group Research And Development Ltd Method for making a flexure bearing mechanism for a mechanical timepiece oscillator
EP3839651B1 (de) 2019-12-19 2024-05-01 Patek Philippe SA Genève Mechanischer oszillator einer uhr mit flexibler führung
EP3936946A1 (de) * 2020-07-10 2022-01-12 Patek Philippe SA Genève Oszillator einer uhr mit flexiblem zapfen

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