EP3572885B1 - Oscillateur mécanique d'horlogerie isochrone en toute position - Google Patents

Oscillateur mécanique d'horlogerie isochrone en toute position Download PDF

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Publication number
EP3572885B1
EP3572885B1 EP18174332.9A EP18174332A EP3572885B1 EP 3572885 B1 EP3572885 B1 EP 3572885B1 EP 18174332 A EP18174332 A EP 18174332A EP 3572885 B1 EP3572885 B1 EP 3572885B1
Authority
EP
European Patent Office
Prior art keywords
arm
oscillator
compass
plane
mechanical oscillator
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.)
Active
Application number
EP18174332.9A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3572885A1 (fr
Inventor
Pascal Winkler
Laurent Klinger
Jean-Luc Helfer
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.)
ETA SA Manufacture Horlogere Suisse
Original Assignee
ETA SA Manufacture Horlogere Suisse
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 ETA SA Manufacture Horlogere Suisse filed Critical ETA SA Manufacture Horlogere Suisse
Priority to EP18174332.9A priority Critical patent/EP3572885B1/fr
Priority to US16/386,308 priority patent/US10838364B2/en
Priority to JP2019091225A priority patent/JP6738461B2/ja
Priority to CN201910438641.8A priority patent/CN110531604B/zh
Publication of EP3572885A1 publication Critical patent/EP3572885A1/fr
Application granted granted Critical
Publication of EP3572885B1 publication Critical patent/EP3572885B1/fr
Active legal-status Critical Current
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
    • 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
    • G04B17/04—Oscillators acting by spring tension
    • G04B17/10—Oscillators with torsion strips or springs acting in the same manner as torsion strips, e.g. weight oscillating in a horizontal plane
    • 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
    • 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
    • G04B17/32—Component parts or constructional details, e.g. collet, stud, virole or piton
    • 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
    • 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
    • G04B31/06—Manufacture or mounting processes
    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
    • G04C3/08—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means wherein movement is regulated by a mechanical oscillator other than a pendulum or balance, e.g. by a tuning fork, e.g. electrostatically
    • G04C3/10—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means wherein movement is regulated by a mechanical oscillator other than a pendulum or balance, e.g. by a tuning fork, e.g. electrostatically driven by electromagnetic means
    • G04C3/101—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means wherein movement is regulated by a mechanical oscillator other than a pendulum or balance, e.g. by a tuning fork, e.g. electrostatically driven by electromagnetic means constructional details
    • G04C3/102—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means wherein movement is regulated by a mechanical oscillator other than a pendulum or balance, e.g. by a tuning fork, e.g. electrostatically driven by electromagnetic means constructional details of the mechanical oscillator or of the coil

Definitions

  • the invention relates to a mechanical clock oscillator, comprising at least one base arranged to be fixed to a plate or a bridge of a clock movement, and at least one inertial element arranged to oscillate around a pivot axis of a fixed position with respect to said at least one base or of a fixed position with respect to said bases when said oscillator comprises several of them, in a pivot plane perpendicular to said virtual pivot axis, each said inertial element being suspended from at least one said base by several flexible links each comprising at least one elastic blade, and said flexible links together defining said virtual pivot axis.
  • the invention also relates to a timepiece movement, comprising at least one such mechanical oscillator, and comprising a plate or a bridge for fixing each said base, which each said oscillator comprises.
  • the invention also relates to a watch comprising at least one such clock movement, and/or comprising at least one such mechanical oscillator.
  • the invention relates to the field of high-precision timepieces, very insensitive to external physical parameters, comprising oscillators with elastic blades, with a high quality factor, and retaining high qualities of isochronism in all positions of the worn .
  • the document EP3276431A1 in the name of CARTIER INT describes a mechanical oscillator comprising a pivotless balance comprising a rim located in a first plane and an anchoring member able to be fixed on a non-oscillating part of the clockwork movement as well as at least two springs each connecting the balance to the anchoring organ.
  • the anchoring member is coaxial with the balance. At least a main part of each spring extends, in an elastically undeformed position, outside the first plane or a plane parallel to this first plane.
  • Each spring is fixed by a first end to the anchoring member and by a second end to the rocker arm. The attachment points of the first ends of the springs on the anchoring member are located outside the foreground.
  • the document US3277394A in the name of HOLT describes a temperature-compensated electromechanical resonator, which comprises two coaxial parallel rings suspended relative to a common structure by flexible elements in a material which compensates for temperature differences, and comprising means for causing the two rings to resonate simultaneously and in opposite directions.
  • the points of attachment between the flexible elements and the rings, and between the flexible elements and the structure, are at the same radial distance from the axis of oscillation of the rings.
  • the document EP2911012A1 in the name of CSEM describes a rotary oscillator for a timepiece comprising a support element intended to allow the assembly of the oscillator on a timepiece, a balance wheel, a plurality of flexible blades connecting the support element to the balance wheel and capable of exert a return torque on the balance, and a rim mounted integral with the balance.
  • the plurality of flexible blades comprises at least two flexible blades including a first blade disposed in a first plane perpendicular to the plane of the oscillator, and a second blade disposed in a second plane perpendicular to the plane of the oscillator and secant with the first plane .
  • the geometric axis of oscillation of the oscillator is defined by the intersection of the first plane and the second plane, this geometric axis of oscillation crossing the first blade and the second blade at seven-eighths of their respective lengths.
  • the document EP2273323A2 in the name of ULYSSE NARDIN describes a mechanical oscillator oscillating around an axis of oscillation without a pivot, said oscillator comprising a rim centered on the axis of oscillation and mounted on a first attachment portion located on the axis of oscillation, a portion of attachment intended to be attached to a frame of a timepiece movement, and a plurality of elastic systems connecting the rim and the attachment portion. At least some of the elastic systems are suspended and are free with reference to the frame.
  • the invention proposes to develop a mechanical oscillator with flexible links capable of high amplitude, and typically up to 25° at least, and which has, in the vertical positions of the lift, walking characteristics as a function of the amplitude equivalent to those measured in a horizontal position.
  • the invention relates to a mechanical clock oscillator according to claim 1.
  • the invention also relates to a clock movement according to claim 28.
  • the invention also relates to a watch according to claim 29.
  • the difficulty of the problem exposed above is to determine a geometry of the flexible links of the oscillator, which makes it possible to obtain a solution which satisfies the two conditions of operation independent of the amplitude, and of operation independent of the orientation of the watch in the field of gravity, while having an amplitude allowing industrial use, typically more than 25°, and preferably from 30° to 40° approximately, or even more.
  • the invention relates to a mechanical clock oscillator 100, which comprises at least one base 2 arranged to be fixed to a plate 3 or a bridge of a clock movement 200.
  • This oscillator 100 comprises at least one inertial element 4, which is arranged to oscillate around a virtual pivot axis D of fixed position with respect to this base 2 if it is unique, or with respect to these bases 2 when the oscillator 100 comprises several of them, in a pivot plane P perpendicular to the virtual pivot axis D.
  • Each inertial element 4 is suspended from at least one such base 2 by several flexible links 5 each comprising at least one elastic blade 6. And these flexible links 5 together define the virtual pivot axis D, in their particular geometric arrangement, in projection on the pivot plane P of the inertial element 4.
  • the present invention strives to avoid any configuration where the inertial mass of the oscillator, typically a balance wheel, comprises rigid arms extending from the serge to an internal diameter of support for elastic blades 6 constituting the flexible connections 5.
  • the invention favors the configuration where elastic blades 6 are fixed to the rim of the inertial element 4 on the one hand, and to the frame (plate or bridge of the movement) of on the other hand at the level of a fixed base 2, by their end located on the outer diameter, that is to say the furthest from the virtual pivot axis D defined by the flexible links 5.
  • the invention favors a crossing of the blades, of course in projection on the pivot plane P because these elastic blades 6 are arranged in different and parallel levels, at the level of the pivot axis D.
  • this configuration according to the the invention requires stacking on more levels than the prior art, but can also be accommodated with reduced blade dimensions, which has little effect on the overall size, which is preferably included in the size of the inertial element 4 itself.
  • At least one such flexible connection 5 comprises at least one deformable compass 7.
  • This term compass is chosen to qualify in a simple way a component which is preferably one-piece, and which comprises, on either side of a top of the compass, deformable branches, which are fixed to various components of the oscillator ; such a deformable compass is not articulated, it is in fact analogous to a dowsing rod.
  • the invention is illustrated with a single branch on each side of the compass top, but it is entirely possible to equip the deformable compass with a plurality of branches, at least on one side of its vertex, the number of branches on each side of the vertex may be different.
  • this deformable compass 7 comprises such an elastic blade 6 forming a first branch 8, which is arranged to be, at a first external end 82, fixed to such a base 2, or which is integral with a said base 2, in particular in a one-piece execution.
  • This first branch 8 is angularly movable, in projection on the pivot plane P, relative to another elastic blade 6 which forms a second branch 9 of the deformable compass 7.
  • This second branch 9 is, at a second external end 94, arranged to be fixed to the inertial element 4, or else is integral with the inertial element 4.
  • the first branch 8 and the second branch 9 of each deformable compass 7 are contiguous at the level of a cusp edge 11, which defines a virtual vertex 10 of the deformable compass 7.
  • branches of this compass are deformed during the oscillation.
  • branches which are straight in the rest position of the oscillator, take on the shape substantially of an arc of a circle of variable radius during the oscillation, during which the top 10 of the deformable compass 7 is movable with respect to the axis virtual pivot point D, from which it is furthest away in the rest position of oscillator 100.
  • the projection on the pivot plane P of the virtual vertex 10 is on a first side of the virtual pivot axis D, opposite to a second side where the first end 82 and the second end 94 project.
  • the geometric field swept by the elastic blades 6 during the oscillation intersects the virtual pivot axis D.
  • the angle formed by the projection, on the pivot plane P, of the virtual vertex 10, of the virtual pivot axis D, and of the first end 82 and/or of the second end 94 is between 160° and 200°.
  • the first branch 8 and the second branch 9 are symmetrical, in projection on the pivot plane P, with respect to a straight line forming a compass axis D7 joining the virtual pivot axis D and the projection of the virtual vertex 10.
  • This projection of the virtual vertex 10 is located on a first side of the axis virtual pivot D, opposite a second side where the first end 82 and the second end 94 project.
  • Each deformable compass 7 thus forms, during the operation of the oscillator 100, a vee, the branches of which are attached externally to the base and the inertial element, and whose point (the top) is free.
  • the vee is closed, and the first branch 8 and the second branch 9 are superimposed.
  • the ratio R/L between on the one hand the eccentricity R of the vertex 10 with respect to the virtual pivot axis D, in projection on the pivot plane P, and on the other hand the shortest length L between the apex 10 and the first end 82 or the second end 94, in projection on the pivot plane P, is between 0.12 and 0.18, or between 0.47 and 0.53. More particularly, the lengths L between the top 10 and the first end 82 on the one hand, and the second end 94 on the other hand, in projection on the pivot plane P, are equal, as visible on the picture 3 .
  • all the compass axes D7 of all the deformable compasses 7, which the flexible links 5 comprise, are uniformly angularly distributed around the virtual pivot axis D.
  • At least one deformable compass 7 comprises straight elastic blades 6. More particularly, all the elastic strips 6 are straight.
  • At least one deformable compass 7 comprises the first branch 8 in a first level P1 parallel to the pivot plane P, and the second branch 9 in a second level P2 parallel to the pivot plane P and distinct from the first P1 level. It is possible to arrange this oscillator with left blades, however the complexity and size are increased, without a clearly visible advantage. More particularly, each deformable compass 7 comprises the first branch 8 in a first level P1 parallel to the pivot plane P, and said second branch 9 in a second level P2 parallel to the pivot plane P and separate from the first level P1.
  • At least one deformable compass 7 comprises a first branch 8 and a second branch 9 whose projections on the pivot plane P, in the unconstrained state of rest of the oscillator 100, are superimposed on one another. the other. More particularly, the projections of the first branch 8 and of the second branch 9, on the pivoting plane P, in the unconstrained state of rest of the oscillator 100, are identical to each other.
  • At least one inertial element 4 extends, in the direction of the virtual pivot axis D, on either side of all the flexible links 5 by which it is suspended from the base 2 or the bases 2, between an upper plane PS and a lower plane PI. More particularly, each inertial element 4 extends, in the direction of the virtual pivot axis D, on either side of all the flexible links 5 by which it is suspended from the base 2 or the bases 2.
  • At least one inertial element 4 has no axial bearing, and has no radial arm, with respect to the virtual pivot axis D, other than the flexible links 5 by which it is suspended from the base 2 or the bases 2. More particularly, each inertial element 4 has no axial bearing, and has no radial arm, with respect to the virtual pivot axis D, other than the flexible links 5 by which it is suspended from the base 2 or to the bases 2.
  • At least one deformable compass 7 comprises at least one intermediate flyweight, more rigid than the first branch 8 and the second branch 9, on the first branch 8 and/or on the second branch 9 and/or on the cusp ridge 11.
  • a riser at the cusp ridge 11 seems superfluous, the variant illustrated by the figures is limited to ensuring the mechanical junction between the first branch 8 and the second branch 9
  • the oscillator 100 comprises, on the same level in the direction of the virtual pivot axis D, three identical flexible connections 5 and at 120° from each other.
  • the ratio R/L between on the one hand the eccentricity R of the vertex 10 with respect to the axis of virtual pivot D, in projection on the pivot plane P, and on the other hand the shortest length L between the vertex 10 and the first end 82 or the second end 94, in projection on the pivot plane P is between 0.12 and 0.18, or between 0.47 and 0.53.
  • FIG. 1 The figures illustrate different variants comprising three flexible connections thus superimposed, arranged at 120° in projection on the plane P: upper compass 7A with first upper branch 8A and second upper branch 9A, intermediate compass 7B with first intermediate branch 8B and second intermediate branch 9B , lower compass 7C with first lower leg 8C and second lower leg 9C.
  • the oscillator 100 comprises, on the same level in the direction of the virtual pivot axis D, an odd number of flexible links 5, preferably identical, to facilitate self-starting of the oscillator.
  • the suitable dimensions for such elastic strips 6 for watch oscillators are: length from 0.50 to 4.00 mm, height from 0.10 to 0.50 mm, thickness from 10 to 40 micrometers, and R/L between 0.10 and 0.20 or between 0.45 and 0.55, and more particularly between 0.12 and 0.18, or between 0.47 and 0.53.
  • the figure 4 illustrates a particular case where the useful lengths of the elastic strips 6 are different, the projections of the strips on the pivot plane P are identical only on one part, which includes the top 10 of the compass, and extends on both sides another of the virtual pivot axis D defined by the flexible links 5.
  • non-symmetrical branches for example of different thicknesses, of different shapes, or other.
  • the figure 7 illustrates another variant where the elastic blades which constitute the flexible connections are not straight, but only symmetrical with respect to a compass axis passing through the compass vertex and the virtual pivot axis, in projection on the pivot plane.
  • the blades could be in treble clef, or another shape allowing their length to be developed, such as a hairspring, or other.
  • Each said flexible link 5 can be produced in silicon and/or silicon dioxide, or in at least partially amorphous material, or in DLC, or in quartz, or in similar materials.
  • the invention also relates to a clock movement 200, comprising at least one such mechanical oscillator 100, and comprising a plate 3 or a bridge for fixing each base 2, which each oscillator 100 comprises.
  • the invention also relates to a watch 300 comprising at least one such timepiece movement 200, and/or comprising at least one such mechanical oscillator 100.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Electromagnetism (AREA)
  • Electric Clocks (AREA)
  • Micromachines (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
EP18174332.9A 2018-05-25 2018-05-25 Oscillateur mécanique d'horlogerie isochrone en toute position Active EP3572885B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP18174332.9A EP3572885B1 (fr) 2018-05-25 2018-05-25 Oscillateur mécanique d'horlogerie isochrone en toute position
US16/386,308 US10838364B2 (en) 2018-05-25 2019-04-17 Mechanical timepiece oscillator which is isochronous in all positions
JP2019091225A JP6738461B2 (ja) 2018-05-25 2019-05-14 すべての位置で等時である機械式計時器振動子
CN201910438641.8A CN110531604B (zh) 2018-05-25 2019-05-24 机械式钟表振荡器、钟表机芯以及手表

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18174332.9A EP3572885B1 (fr) 2018-05-25 2018-05-25 Oscillateur mécanique d'horlogerie isochrone en toute position

Publications (2)

Publication Number Publication Date
EP3572885A1 EP3572885A1 (fr) 2019-11-27
EP3572885B1 true EP3572885B1 (fr) 2022-04-20

Family

ID=62386127

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18174332.9A Active EP3572885B1 (fr) 2018-05-25 2018-05-25 Oscillateur mécanique d'horlogerie isochrone en toute position

Country Status (4)

Country Link
US (1) US10838364B2 (zh)
EP (1) EP3572885B1 (zh)
JP (1) JP6738461B2 (zh)
CN (1) CN110531604B (zh)

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA768731A (en) * 1963-03-12 1967-10-03 V. Braine Michael Resonator structure and method of construction
CH452443A (fr) * 1964-07-10 1968-05-31 Movado Montres Oscillateur pour pièces d'horlogerie
EP0964319A1 (fr) * 1998-06-08 1999-12-15 Manufacture des Montres Rolex S.A. Procédé pour transmettre des impulsions d'énergie mécanique d'une source motrice à un régulateur oscillant
CH701421B1 (fr) * 2009-07-10 2014-11-28 Manuf Et Fabrique De Montres Et Chronomètres Ulysse Nardin Le Locle Sa Oscillateur mécanique.
CH707808B1 (fr) * 2013-03-19 2017-05-15 Nivarox Far Sa Cassette de mécanisme d'horlogerie.
EP2911012B1 (fr) * 2014-02-20 2020-07-22 CSEM Centre Suisse d'Electronique et de Microtechnique SA - Recherche et Développement Oscillateur de pièce d'horlogerie
EP3054357A1 (fr) * 2015-02-03 2016-08-10 ETA SA Manufacture Horlogère Suisse Mécanisme oscillateur d'horlogerie
EP3276431B1 (fr) * 2016-07-27 2020-01-01 Cartier International AG Oscillateur mécanique pour mouvement d'horlogerie
EP3299905B1 (en) 2016-09-27 2020-01-08 CSEM Centre Suisse d'Electronique et de Microtechnique SA - Recherche et Développement Mechanical oscillator for a horological movement
EP3312682B1 (fr) * 2016-10-18 2019-02-20 ETA SA Manufacture Horlogère Suisse Resonateur a haut facteur de qualite pour montre mecanique
EP3324246B1 (fr) * 2016-11-16 2019-11-06 The Swatch Group Research and Development Ltd Protection d'un mecanisme resonateur a lames contre les chocs axiaux
EP3326963B1 (fr) * 2016-11-23 2020-01-01 The Swatch Group Research and Development Ltd Lame flexible pour l'horlogerie et procede de fabrication

Also Published As

Publication number Publication date
US10838364B2 (en) 2020-11-17
US20190361398A1 (en) 2019-11-28
CN110531604B (zh) 2021-02-09
JP2019203890A (ja) 2019-11-28
JP6738461B2 (ja) 2020-08-12
CN110531604A (zh) 2019-12-03
EP3572885A1 (fr) 2019-11-27

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