EP3410229A1 - Uhrkomponente mit flexiblem zapfen - Google Patents

Uhrkomponente mit flexiblem zapfen Download PDF

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Publication number
EP3410229A1
EP3410229A1 EP17173350.4A EP17173350A EP3410229A1 EP 3410229 A1 EP3410229 A1 EP 3410229A1 EP 17173350 A EP17173350 A EP 17173350A EP 3410229 A1 EP3410229 A1 EP 3410229A1
Authority
EP
European Patent Office
Prior art keywords
blades
support
blade
component
watch
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
EP17173350.4A
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English (en)
French (fr)
Other versions
EP3410229B1 (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
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 EP17173350.4A priority Critical patent/EP3410229B1/de
Publication of EP3410229A1 publication Critical patent/EP3410229A1/de
Application granted granted Critical
Publication of EP3410229B1 publication Critical patent/EP3410229B1/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
    • G04B15/00—Escapements
    • G04B15/14—Component parts or constructional details, e.g. construction of the lever or the escape wheel
    • 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
    • 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

Definitions

  • the present invention relates to a watch component such as an oscillator that can serve as a time base in a mechanical watch movement.
  • the present invention relates to a flexible pivot watch component, that is to say a watch component comprising a movable portion guided in rotation not by a physical axis but by elastic blades that connect the movable part 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 movable part to the support extend in different parallel planes and intersect without contact.
  • the oscillator comprises first, second and third blades, the first and third blades being identical, the respective median planes of the first and third blades perpendicular to the virtual axis of rotation appearing symmetrical with respect to the median plane of the second blade.
  • split-blade oscillators have the disadvantage of low impact resistance, the moving part tending to pivot about an axis parallel to its plane during vertical shocks.
  • the present invention aims at providing a clock component, in particular an oscillator, with separate crossed blades whose impact resistance is improved.
  • a watch component comprising a movable part, a support and a flexible pivot connecting the movable part to the support for guiding the movable part in rotation relative to the support around a virtual axis of rotation, the flexible pivot being arranged to resiliently bias the movable portion to a rest position, the flexible pivot comprising first, second and third elastic blades intersecting without contact, the respective median planes of said blades perpendicular to the virtual axis of rotation being substantially parallel, said respective median planes of the first and third blades being substantially symmetrical with respect to said median plane of the second blade, the first and third blades having substantially the same stiffness, characterized in that, in plan view from above and when the moving part is in its rest position, the respective neutral fibers of the first and third blades are substantially symmetrical with respect to a straight line that defines the neutral fiber of the second blade and the junction point of the second blade and the movable portion is located in a reentrant angular sector defined by the first and third blades.
  • the present invention further provides a watch movement and a watch comprising the watch component as defined above.
  • a watch 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 moving part or serge 3 and a flexible pivot 4 formed of resilient blades 4a, 4b, 4c.
  • the serge 3 is typically in the form of a closed ring, as shown.
  • 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 blades 4a, 4b, 4c connect the support 2 to the serge 3, the latter being held solely by said blades.
  • the blades 4a, 4b, 4c are three in number, extend respectively in three different planes which are parallel to the plane of the serge 3 and intersect, in plan view from above ( figure 1 ) at a same point O which is preferably coincident with the center of mass of the serge 3.
  • the point O corresponds more precisely to the intersection of the neutral fibers of the blades 4a, 4b, 4c.
  • the blades 4a, 4b, 4c guide the serge 3 in rotation about a virtual axis of rotation A perpendicular to the plane of the serge 3 and corresponding to the point O in plan view from above, and tend to recall the serge 3 to a position of rest (equilibrium position) during its oscillations around the axis A.
  • the blade 4b In the direction of the axis A the blade 4b is located between the blades 4a, 4c.
  • the blades 4a, 4c have the same stiffness and are even typically identical with in particular the same thickness and the same height.
  • the blade 4b has the same stiffness as the blades 4a, 4c or is identical to the blades 4a, 4c.
  • the respective median planes of the blades 4a, 4c perpendicular to the axis A are symmetrical with respect to the median plane of the blade 4b.
  • the respective neutral fibers of the blades 4a, 4c, or even the blades 4a, 4c themselves are symmetrical with respect to the straight line D whose neutral fiber of the blade 4b constitutes a segment, and the junction point 4b 'of the blade 4b to the serge 3 is located in the reentrant angular sector (angle sector greater than 180 °, equal to 360 ° minus the angle ⁇ illustrated in FIG. figure 1 ) defined by the blades 4a, 4c.
  • the median plane of the blade 4b is preferably coincident with the median plane P of the serge 3.
  • the term "median plane of a blade” means the plane perpendicular to the axis A which passes through the center of mass of each straight section of the blade and by "median plane of the serge” the plane perpendicular to the axis A which passes through the center of mass of the serge.
  • the blades 4a, 4b, 4c have a rectangular or almost rectangular cross section. In this case, the median plane of each blade is located at half the height of the blade.
  • the arrangement of the blades 4a, 4b, 4c as described above gives the oscillator 1 excellent shock resistance in that the serge 3 will tend to move vertically (in the direction of the axis of rotation virtual A) in the event of a vertical impact rather than in rotation around an axis parallel to the plane of the serge 3.
  • the resultant reaction forces of the blades 4a, 4b, 4c on the serge 3 during a Vertical shock will pass through the point O rather than a point distant from the center of mass of the serge as in the prior art flexible pivot oscillators.
  • the natural frequency of the oscillator 1 as well as the interaction between the oscillator 1 and the escapement of the watch movement will therefore be less disturbed.
  • the oscillator 1 can be rendered insensitive to gravity, in other words the frequency of the oscillator 1 can be made independent of the position of the watch relative to the gravitational field, by choosing a crossing point O of the blades 4a , 4b, 4c located at 12.7% of the length of each blade measured from the support 2, according to the theory developed by WH Wittrick. Such a position of the point O minimizes the displacements of the virtual axis of rotation A during the operation of the oscillator 1.
  • the angle between the blades 4a, 4b, 4c is preferably equal to 120 °, as in the example shown. Such an angle is indeed optimal in terms of impact resistance and independence of the frequency with respect to the orientation of the watch.
  • the blades 4a, 4b, 4c may, however, have a different angular distribution.
  • the angle ⁇ between the blades 4a, 4c can in particular be between 80 ° and 160 °, and is typically between 100 ° and 140 °.
  • the oscillator 1 may consist of three monolithic assemblies superimposed and assembled, each monolithic assembly comprising a stage 2a, 2b or 2c of the support 2, one of the blades 4a, 4b, 4c and a stage 3a, 3b or 3c of the serge 3, as shown in figure 2 .
  • the assembly is carried out for example by welding, brazing or gluing, preferably by thermocompression bonding, eutectic bonding or polymer bonding.
  • the oscillator 1 consists of two superimposed and assembled monolithic assemblies, a first of these sets comprising a stage of the support 2, two of the blades 4a, 4b, 4c and a stage of the serge 3, a second of these assemblies comprising a support stage 2, one of the blades 4a, 4b, 4c and a stage of the serge 3.
  • the oscillator 1 is entirely monolithic.
  • the oscillator 1, when it is entirely monolithic, or each monolithic assembly forming part of it, is made for example of silicon or of any other suitable material according to the Deep Reactive Ion Etching (DRIE) technique, of nickel, nickel alloy or any other suitable material according to the LIGA technique (lithography, electroplating, molding), of steel, copper-beryllium, nickel silver or other metallic alloy by milling, spark erosion or 3D printing, of metallic glass by molding , or glass, sapphire or any other suitable material according to the laser micro-structuring technique coupled to a chemical attack.
  • the oscillator 1, when it is entirely monolithic, or each monolithic assembly forming part of it, may be totally or partially covered with a coating, for example a coating of silicon oxide in the case of an oscillator or a set monolithic silicon.
  • Holes 5 are made through the support 2 to allow its attachment, by means of fasteners such as screws or pins, on a fixed or movable support of the movement, typically the frame of said movement.
  • the stages of the serge 3 are assembled to each other by one of the techniques (welding, brazing or bonding) mentioned above and the stages of the support 2 are also assembled to each other by one of said techniques.
  • the stages of the support 2 may also not be fixed to each other before the mounting of the support 2 on said fixed or mobile support. They are then held together by the fastening elements which pass through the holes 5, each of the holes 5 being formed by aligned holes made respectively in the stages of the support 2.
  • the figure 3 shows the central monolithic set of a variant of the oscillator 1, an oscillator which is formed here of three monolithic assemblies superimposed and assembled as in the example of the figures 1 and 2 .
  • This central monolithic assembly comprises a central stage 2b of the support 2, the plate 4b and a central stage 3b of the serge 3, the two other monolithic assemblies, upper and lower, being identical to the assemblies 2a, 3a, 4a and 2c, 3c, 4c of the example of figures 1 and 2 .
  • the holes 5b made in the central stage 2b of the support 2 and intended to be traversed by said fastening elements are oblong and extend in the direction of the blade 4b at rest.
  • These oblong holes 5b offer this central stage 2b a degree of freedom in translation relative to the upper and lower stages of the support 2 during assembly of the support 2 on said fixed or movable support, the central stage 2b is then held by clamping between the upper and lower floors. In this way, inaccuracies in manufacture and / or assembly can be corrected and the risk of the system becoming hyperstatic. It is also possible to mount the support 2 in such a way that the degree of freedom in translation of the central stage 2b is preserved during the operation of the oscillator 1.
  • the upper stage 2a or the lower stage 2c of the support 2 which has the oblong holes.
  • This principle of giving one of the stages of the support 2 a degree of freedom in translation can also be applied in the case where the oscillator consists of two monolithic assemblies superimposed and assembled, that of the two monolithic assemblies having only one blade then having the oblong holes.
  • the present invention is applicable to other watch components than an oscillator, for example to an escapement anchor, a rocker or a lever.
  • an escapement anchor for example to an escapement anchor, a rocker or a lever.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Micromachines (AREA)
EP17173350.4A 2017-05-30 2017-05-30 Uhrkomponente mit flexiblem zapfen Active EP3410229B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP17173350.4A EP3410229B1 (de) 2017-05-30 2017-05-30 Uhrkomponente mit flexiblem zapfen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17173350.4A EP3410229B1 (de) 2017-05-30 2017-05-30 Uhrkomponente mit flexiblem zapfen

Publications (2)

Publication Number Publication Date
EP3410229A1 true EP3410229A1 (de) 2018-12-05
EP3410229B1 EP3410229B1 (de) 2021-07-14

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112711180A (zh) * 2019-10-25 2021-04-27 伊塔瑞士钟表制造股份有限公司 旋转谐振器机构的柔性引导件和一组叠置的柔性引导件
EP4273633A1 (de) * 2022-05-02 2023-11-08 CSEM Centre Suisse d'Electronique et de Microtechnique SA - Recherche et Développement Mechanischer oszillator mit isochronismuskorrektur
EP4286959A1 (de) 2022-06-02 2023-12-06 Patek Philippe SA Genève Oszillator einer uhr mit flexiblem zapfen

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1574359A (de) * 1967-08-02 1969-07-11
EP2911012A1 (de) 2014-02-20 2015-08-26 CSEM Centre Suisse d'Electronique et de Microtechnique SA - Recherche et Développement Oszillator einer Uhr
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

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1574359A (de) * 1967-08-02 1969-07-11
EP2911012A1 (de) 2014-02-20 2015-08-26 CSEM Centre Suisse d'Electronique et de Microtechnique SA - Recherche et Développement Oszillator einer Uhr
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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
BARROT F ET AL: "Un nouveau régulateur mécanique pour une réserve de marche exceptionnelle", SOCIETE SUISSE DE CHRONOMETRIE. ACTES DE LA JOURNEE D'ETUDE, SOCIETE SUISSE DE CHRONOMETRIE, CH, 17 September 2014 (2014-09-17), pages 43 - 48, XP002744902, ISSN: 1023-2680 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112711180A (zh) * 2019-10-25 2021-04-27 伊塔瑞士钟表制造股份有限公司 旋转谐振器机构的柔性引导件和一组叠置的柔性引导件
US11693366B2 (en) 2019-10-25 2023-07-04 Eta Sa Manufacture Horlogère Suisse Flexible guide and set of superimposed flexible guides for rotary resonator mechanism, in particular of a horological movement
EP4273633A1 (de) * 2022-05-02 2023-11-08 CSEM Centre Suisse d'Electronique et de Microtechnique SA - Recherche et Développement Mechanischer oszillator mit isochronismuskorrektur
EP4286959A1 (de) 2022-06-02 2023-12-06 Patek Philippe SA Genève Oszillator einer uhr mit flexiblem zapfen

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