EP3382470A1 - Oszillator einer uhr mit flexiblem zapfen - Google Patents

Oszillator einer uhr mit flexiblem zapfen Download PDF

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Publication number
EP3382470A1
EP3382470A1 EP17163684.8A EP17163684A EP3382470A1 EP 3382470 A1 EP3382470 A1 EP 3382470A1 EP 17163684 A EP17163684 A EP 17163684A EP 3382470 A1 EP3382470 A1 EP 3382470A1
Authority
EP
European Patent Office
Prior art keywords
blades
serge
oscillator
support
pair
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
EP17163684.8A
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English (en)
French (fr)
Other versions
EP3382470B1 (de
Inventor
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
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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 EP17163684.8A priority Critical patent/EP3382470B1/de
Publication of EP3382470A1 publication Critical patent/EP3382470A1/de
Application granted granted Critical
Publication of EP3382470B1 publication Critical patent/EP3382470B1/de
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Anticipated expiration legal-status Critical

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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
    • G04B31/00—Bearings; Point suspensions or counter-point suspensions; Pivot bearings; Single parts therefor
    • G04B31/02—Shock-damping bearings

Definitions

  • the present invention relates to a clock oscillator that can serve as a time base in a mechanical watch movement.
  • the present invention relates to a clock oscillator flexible pivot, that is to say, an oscillator comprising a serge guided in rotation not by a physical axis but by elastic blades that connect the serge to a support and which define a virtual axis of rotation.
  • the flexible pivot used in the present invention is of the type with separate crossed blades: the blades which connect the serge to the support extend in different parallel planes and intersect without contact.
  • the object of the present invention is to provide a split-blade clock oscillator whose impact resistance is improved while allowing the oscillator to have a frequency independent of the positions of the watch and the amplitude of oscillation or, alternatively, to have a desired anisochronism to compensate for a defect provided for example by the exhaust.
  • a clock oscillator comprising a serge, a support and a flexible pivot connecting the serge to the support for guiding the serge in rotation relative to the support around a virtual axis of rotation, the flexible pivot being arranged for resiliently biasing the serge to a rest position, characterized in that the flexible pivot comprises a first pair of blades constituted by first and second resilient blades which extend into first and second parallel planes and which intersect without contact and a second pair of blades constituted by third and fourth resilient blades which extend into third and fourth planes parallel to the first and second planes and which intersect without contact, and in that in plan view from above and when the serge is in its rest position, the first pair of blades and the second pair of blades are symmetrical with respect to the center of rotation of the s erge and the point of intersection of the first and second resilient blades is offset from the point of intersection of the third and fourth resilient blades.
  • the present invention further provides a watch movement and a watch comprising the oscillator as defined above.
  • a clock oscillator 1 for a mechanical watch movement intended to be part of a watch such as a wristwatch or a pocket watch, comprises a support 2, a serge 3 and a flexible pivot 4 formed of elastic blades 4a to 4d.
  • the serge 3 is typically in the form of a closed ring, as shown.
  • the support 2 is in two parts, namely a first part 2a and a second part 2b.
  • the support 2 is intended to be fixed on a fixed or movable support of the movement, typically on the frame of the movement.
  • the two parts 2a, 2b of the support 2 are located in the opening defined by the serge 3, diametrically opposite.
  • the elastic blades 4a to 4d connect the support 2 to the serge 3, the latter being held only by the blades 4a to 4d.
  • the elastic blades 4a to 4d are four in number. They guide the serge 3 in rotation around a virtual axis of rotation A and tend to recall the serge 3 to a rest position (equilibrium position) during its oscillations around the axis A.
  • the elastic blades 4a to 4d extend respectively in four different planes which are parallel to the plane of the serge 3 and perpendicular to the virtual axis of rotation A.
  • the elastic blades 4a to 4d more particularly comprise first and second blades 4a, 4b which intersect without contact and third and fourth blades 4c, 4d which intersect without contact.
  • first and second blades 4a, 4b more precisely their neutral fibers, intersect at a cross point P1 and the third and fourth blades 4c, 4d, more precisely their neutral fibers, intersect at a cross point P2.
  • the first and second blades 4a, 4b extend from the first portion 2a of the support 2 to the inner face of the serge 3.
  • the third and fourth blades 4c, 4d extend from the second portion 2b of the support 2 to the face
  • the first blade 4a is between the third and second blades 4c, 4b and the second blade 4b is between the first and fourth blades 4a, 4d in the vertical (axial) direction.
  • the order of the blades 4a to 4d could however be different.
  • the oscillator 1 is preferably constituted of two monolithic assemblies superimposed and assembled.
  • a first monolithic assembly comprises a first half 3a of the serge 3, a sub-part 2a 'of the first part 2a of the support 2, a sub-part 2b' of the second part 2b of the support 2 and the first and third blades 4a , 4c.
  • a second monolithic assembly comprises a second half 3b of the serge 3, another sub-part 2a "of the first part 2a of the support 2, another sub-part 2b" of the second part 2b of the support 2 and the second and fourth blades 4b, 4d.
  • the two sub-parts 2a ', 2a "of the first part 2a of the support 2 are fixed to each other, as well as the two sub-parts 2b', 2b" of the second part 2b of the support 2 and the two halves 3a, 3b of the serge 3.
  • the assembly is carried out for example by welding, brazing or gluing, preferably by thermocompression bonding (thermocompression bonding), eutectic bonding or polymer bonding.
  • the oscillator 1 is entirely monolithic.
  • Oscillator 1 when it is entirely monolithic, or each monolithic assembly 3a, 2a ', 2b', 4a, 4c and 3b, 2a ", 2b", 4b, 4d is made for example of silicon or of any other material suitable for the Deep Reactive Ion Etching (DRIE) technique, in nickel, nickel alloy or any other suitable material according to the LIGA technique (lithography, electroplating, molding), steel, copper-beryllium, nickel-silver or other metal alloy by milling, spark erosion or 3D printing, in glass, metallic glass, sapphire or any other suitable material according to the technique of laser micro-structuring coupled with chemical etching.
  • DRIE Deep Reactive Ion Etching
  • the pair of blades constituted by the first and second blades 4a, 4b and the pair of blades constituted by the third and fourth blades 4c, 4d are symmetrical to each other in planar view from above ( figures 2 and 3 ) relative to the center of rotation O (corresponding to the virtual axis of rotation A) of the serge 3 when the serge 3 is in its rest position.
  • the center of rotation O is also the center of mass of the serge 3.
  • the center of rotation O is located midway between the cross points P1, P2.
  • the pairs of blades 4a, 4b and 4c, 4d are further symmetrical to each other in plan view from above with respect to a line D passing through the center of rotation O of the serge 3 when the serge 3 is in its rest position, as shown in FIGS. figures 2 and 3 .
  • This symmetrical arrangement also makes the frequency of the oscillator 1 substantially independent of the orientation of the watch relative to the gravitational field, whatever the position of the cross points P1 and P2 (at least in a wide range).
  • the diagram of the figure 4 shows the maximum deviation between the different reference orientations of the oscillator 1 with respect to the gravity as a function of the position, as a percentage of the length of each blade 4a to 4d measured from its junction point to the support 2, cross points P1, P2. It can be seen that this deviation is substantially zero at least for positions of cross points P1 and P2 between 10 and 30%.
  • the elastic blades can therefore intersect at positions different from that (12.7%) of a Wittrick-type oscillator, in particular at positions that are greater than or even greater than 12.7%, which will make it possible to increase the amplitude of the oscillator. oscillation and / or decrease the diameter of the serge 3.
  • the pair of blades 4a, 4b and the pair of blades 4c, 4d are offset in plan view from above so that the cross points P1, P2 are also offset.
  • This offset of the crossing points P1, P2 makes it possible to make the oscillator 1 substantially isochronous, or to obtain a desired anisochronism compensating for an isochronism defect provided by another component of the watch movement such as the escapement.
  • anisochronism is understood to mean the variations of the frequency as a function of the oscillation amplitude of the oscillator 1. The smaller these variations, the more oscillator 1 is close to isochronism.
  • FIG. 5 An example of an isochronism curve is shown in figure 5 .
  • the curve of the figure 5 represents the step M, in seconds / day, of the oscillator 1 between an amplitude of oscillation of 20 ° and an amplitude of oscillation of 2 ° as a function of the distance d, in ⁇ m and in plan view from above, between the crossing points P1, P2.
  • the offset between the cross points P1, P2, in plan view from above and when the serge 3 is in its rest position is preferably at least 1 ⁇ m, preferably at least 1.2 ⁇ m, preferably at least 1.5 ⁇ m, preferably at least 2 ⁇ m, preferably at least 3 ⁇ m, preferably at least 4 ⁇ m, preferably at least less than 5 ⁇ m, preferably at least 6 ⁇ m, preferably at least 7 ⁇ m, preferably at least 8 ⁇ m, preferably at least 9 ⁇ m, preferably at least 10 ⁇ m, preferably at least 15 ⁇ m, preferably at least 20 ⁇ m.
  • the angle ⁇ between the first and second blades 4a, 4b, respectively between the third and fourth blades 4c, 4d, in plan view from above and when the serge 3 is in its rest position, is typically between 30 ° and 150 °. °, preferably between 60 ° and 120 °, preferably between 80 ° and 100 ° and preferably equal to 90 °.
  • the 90 ° angle is optimum in terms of impact resistance and independence of the frequency with respect to the orientation of the watch. In the present invention the angle ⁇ has little influence on isochronism.
  • the oscillator designated by 1 "
  • the oscillator is arranged to allow an adjustment of the position of the crossing points P1, P2 in order to optimize the isochronism (zero running between oscillation amplitudes of 20 ° and 2 °, cf. figure 5 ) despite manufacturing tolerances.
  • the part 2a of the support 2 from which extend the first and second blades 4a, 4b is in two subparts 2 1 , 2 2 connected by an elastic member 2 3 and thus movable relative to each other.
  • the portion 2b of the support 2 from which extend the third and fourth blades 4c, 4d is into two sub-parts 2 4, 2 5 mobile relative to each other and fixed respectively to the two sub-parts 2 1 , 2 2 of the part 2a of the support 2.
  • the order of the blades 4a to 4d in the vertical direction is different from that of the embodiment illustrated in FIGS.
  • the elastic member 23 is a guide member designed to allow a displacement of the sub-parts 2 1 , 2 2 of the portion 2a of the support 2 only in translation. In a variant, it could be designed to allow displacement of the sub-parts 2 1 , 2 2 only in rotation. It could also be deleted.
  • the support 2 can be mounted on an adjustment device.
  • the adjustment device is for example eccentric or micrometer screw associated (e) a slider or a flexible linear guide system.
  • An example of such an adjustment device is illustrated in FIG. figure 8 . It comprises a slider 5 guided in a groove 6 of a support 7 fixed on the frame of the watch movement. The position of the slider 5 in the groove 6 can be adjusted by an eccentric 8.
  • a return spring 9 holds the slider 5 in abutment against the eccentric 8.
  • the slider 5 carries a pin 10 engaged in one or more aligned holes 12 of the sub-parts 2 1 , 2 4 of the support 2.
  • the support 7 carries another pin 11 engaged in one or more aligned holes 13 of the sub-parts 2 2 , 2 5 of the support 2.
  • the assembly of the parts 2a, 2b of the support 2 is such that the symmetry of the pairs of blades 4a, 4b and 4c, 4d is retained after adjustment.
  • the respective positions of the crossing points P1, P2 are set simultaneously and symmetrically.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Electric Clocks (AREA)
EP17163684.8A 2017-03-29 2017-03-29 Oszillator einer uhr mit flexiblem zapfen Active EP3382470B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP17163684.8A EP3382470B1 (de) 2017-03-29 2017-03-29 Oszillator einer uhr mit flexiblem zapfen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17163684.8A EP3382470B1 (de) 2017-03-29 2017-03-29 Oszillator einer uhr mit flexiblem zapfen

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EP3382470B1 EP3382470B1 (de) 2020-05-06

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3451073A1 (de) * 2017-07-28 2019-03-06 The Swatch Group Research and Development Ltd Uhrwerkoszillator mit flexiblen führungen mit grosser winkelförmiger laufbahn
US10895845B2 (en) 2018-06-25 2021-01-19 The Swatch Group Research And Development Ltd Timepiece oscillator with flexure bearings having a long angular stroke
WO2021009613A1 (fr) * 2019-07-12 2021-01-21 Patek Philippe Sa Geneve Procede de reglage d'un oscillateur horloger a pivot flexible
CN112506022A (zh) * 2019-09-13 2021-03-16 Eta瑞士钟表制造股份有限公司 钟表机芯的轴承、尤其是用于旋转轮的轴的减震轴承
EP4286959A1 (de) 2022-06-02 2023-12-06 Patek Philippe SA Genève Oszillator einer uhr mit flexiblem zapfen

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024100597A1 (en) 2022-11-09 2024-05-16 Ecole Polytechnique Federale De Lausanne (Epfl) Pivot, process for manufacturing such a pivot, oscillator comprising such a pivot, watch movement and timepiece comprising such an oscillator

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1018160C2 (nl) * 2001-05-28 2002-12-03 Tno Inrichting met kruisveer verbindingen en werkwijze voor het vervaardigen van een dergelijke inrichting.
EP2911012A1 (de) 2014-02-20 2015-08-26 CSEM Centre Suisse d'Electronique et de Microtechnique SA - Recherche et Développement Oszillator einer Uhr
EP2975470A1 (de) * 2014-07-14 2016-01-20 Nivarox-FAR S.A. Biegsamer Führungsdraht für Uhrwerke
EP2998800A2 (de) * 2014-09-16 2016-03-23 Patek Philippe SA Genève Uhrkomponente mit flexiblem zapfenlager
WO2016096677A1 (fr) 2014-12-18 2016-06-23 The Swatch Group Research And Development Ltd Resonateur d'horlogerie a lames croisees
EP3130966A1 (de) * 2015-08-11 2017-02-15 ETA SA Manufacture Horlogère Suisse Mechanisches uhrwerk, das mit einem bewegungsrückkopplungssysteme ausgestattet ist

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1018160C2 (nl) * 2001-05-28 2002-12-03 Tno Inrichting met kruisveer verbindingen en werkwijze voor het vervaardigen van een dergelijke inrichting.
EP2911012A1 (de) 2014-02-20 2015-08-26 CSEM Centre Suisse d'Electronique et de Microtechnique SA - Recherche et Développement Oszillator einer Uhr
EP2975470A1 (de) * 2014-07-14 2016-01-20 Nivarox-FAR S.A. Biegsamer Führungsdraht für Uhrwerke
EP2998800A2 (de) * 2014-09-16 2016-03-23 Patek Philippe SA Genève Uhrkomponente mit flexiblem zapfenlager
WO2016096677A1 (fr) 2014-12-18 2016-06-23 The Swatch Group Research And Development Ltd Resonateur d'horlogerie a lames croisees
EP3130966A1 (de) * 2015-08-11 2017-02-15 ETA SA Manufacture Horlogère Suisse Mechanisches uhrwerk, das mit einem bewegungsrückkopplungssysteme ausgestattet ist

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3451073A1 (de) * 2017-07-28 2019-03-06 The Swatch Group Research and Development Ltd Uhrwerkoszillator mit flexiblen führungen mit grosser winkelförmiger laufbahn
US10895845B2 (en) 2018-06-25 2021-01-19 The Swatch Group Research And Development Ltd Timepiece oscillator with flexure bearings having a long angular stroke
WO2021009613A1 (fr) * 2019-07-12 2021-01-21 Patek Philippe Sa Geneve Procede de reglage d'un oscillateur horloger a pivot flexible
CN114127641A (zh) * 2019-07-12 2022-03-01 百达翡丽日内瓦公司 调节挠性枢轴钟表振荡器的方法
CN114127641B (zh) * 2019-07-12 2024-03-22 百达翡丽日内瓦公司 调节挠性枢轴钟表振荡器的方法
CN112506022A (zh) * 2019-09-13 2021-03-16 Eta瑞士钟表制造股份有限公司 钟表机芯的轴承、尤其是用于旋转轮的轴的减震轴承
EP4286959A1 (de) 2022-06-02 2023-12-06 Patek Philippe SA Genève Oszillator einer uhr mit flexiblem zapfen

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