EP4134754A1 - Masse inertielle munie d'un element inertiel flexible, notamment pour l' horlogerie - Google Patents

Masse inertielle munie d'un element inertiel flexible, notamment pour l' horlogerie Download PDF

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Publication number
EP4134754A1
EP4134754A1 EP21191261.3A EP21191261A EP4134754A1 EP 4134754 A1 EP4134754 A1 EP 4134754A1 EP 21191261 A EP21191261 A EP 21191261A EP 4134754 A1 EP4134754 A1 EP 4134754A1
Authority
EP
European Patent Office
Prior art keywords
flexible
inertial
inertial mass
main body
regulating member
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
EP21191261.3A
Other languages
German (de)
English (en)
French (fr)
Inventor
Thierry Hessler
Damien Prongue
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 EP21191261.3A priority Critical patent/EP4134754A1/fr
Priority to JP2022109601A priority patent/JP7429263B2/ja
Priority to US17/865,878 priority patent/US20230052485A1/en
Priority to CN202222112775.0U priority patent/CN218350720U/zh
Priority to KR1020220100628A priority patent/KR20230025357A/ko
Priority to CN202210966832.3A priority patent/CN115933348A/zh
Publication of EP4134754A1 publication Critical patent/EP4134754A1/fr
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
    • G04B18/00—Mechanisms for setting frequency
    • G04B18/006—Mechanisms for setting frequency by adjusting the devices fixed on the balance
    • 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
    • G04B17/26—Compensation of mechanisms for stabilising frequency for the effect of variations of the impulses
    • 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
    • G04B17/06—Oscillators with hairsprings, e.g. balance
    • 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
    • G04B17/06—Oscillators with hairsprings, e.g. balance
    • G04B17/063—Balance construction

Definitions

  • the invention relates to an inertial mass provided with a flexible inertial element, in particular for watchmaking.
  • the invention also relates to a regulating member comprising such an inertial mass.
  • the invention also relates to a clock movement comprising such a regulating member.
  • the regulating organ constitutes the time base of the watch. It is also called resonator.
  • an inertial mass To constitute a mechanical resonator, an inertial mass, a guide and an elastic return element are required.
  • a spiral spring acts as an elastic return element for the mass inertial that constitutes a pendulum. This balance wheel is guided in rotation by pivots which rotate in smooth ruby bearings.
  • the regulating organ of mechanical watches is said to be anisochronous because its frequency depends on various factors such as the amplitude of the oscillations, the orientation of the watch or even the temperature.
  • the balance spring must generally be able to be adjusted to improve the precision of a watch.
  • the watchmaker carries out the adjustment of rate generally at large amplitude and by averaging on the orientations of the watch.
  • means for adjusting the rigidity of the hairspring such as a racket, are used to modify the effective length of the spring.
  • its rigidity is modified to adjust the running precision of the watch.
  • the effect of a traditional racket for adjusting the rate remains limited, and it is not always effective in making the adjustment sufficiently precise, of the order of a few seconds or a few tens of seconds per day.
  • adjustment means comprising one or more screws arranged in the rim of the balance. By acting on the screws, the inertia of the balance wheel is modified, which has the effect of modifying its rate.
  • this mode of adjustment is not easy to carry out, and nevertheless does not make it possible to obtain a sufficient finesse of the adjustment of the rate of the oscillator, because the adjustment is only made for a single amplitude.
  • the object of the invention is to remedy the aforementioned drawbacks, and aims to provide an inertial mass for a timepiece regulating member.
  • the invention relates to an inertial mass intended to be mounted on a regulating member, in particular of a clock movement, the inertial mass being configured to be subjected to a rotary oscillation movement at a predetermined frequency.
  • the inertial mass having a rigid main body.
  • the inertial mass is remarkable in that it comprises at least one flexible inertial element assembled to the main body, the flexible inertial element being configured to modify the geometry of the inertial mass according to the oscillation amplitude.
  • the flexible inertial element By modifying the geometry of the inertial mass as a function of its amplitude, action is taken on the anisochronism slope to keep a frequency substantially constant despite the aforementioned parasitic effects.
  • the flexible inertial element also oscillates.
  • the oscillation of the flexible inertial element changes the geometry of the inertial mass depending on the amplitude of oscillation of the inertial mass.
  • the amplitude of oscillation of the flexible inertial element depends on the amplitude of oscillation of the inertial mass.
  • the geometry of the inertial mass varies according to its amplitude of oscillation.
  • the frequency remains substantially constant over time, and the precision of the regulator member is improved.
  • the invention includes means for adjusting the position of the flexible inertial element relative to the main body.
  • the adjustment means are configured to apply a variable force or torque to the flexible inertial element.
  • the adjustment means being preferably configured to adjust the position of the second flexible inertial element relative to the main body.
  • a flexible inertial element comprises a flexible part and a rigid flyweight, the flexible part connecting the flyweight to the main body.
  • the flexible part comprises a first flexible blade connected by one end to the flyweight.
  • the flexible part comprises a rigid portion connected to the other end of the first flexible blade, and comprises a second flexible blade connecting the rigid portion to the main body by its ends.
  • the adjustment means comprise a longitudinally adjustable screw, the screw being configured to bear against the flexible inertial element.
  • the screw is arranged to bear against the rigid portion.
  • the main body is an annular balance, the flexible inertial element(s) being arranged inside the annular balance.
  • the inertial mass extends substantially in the same plane.
  • the inertial mass comprises at least one additional flyweight, preferably two additional flyweights, arranged on the main body, the second additional flyweight having an adjustable position to modify the inertia of the inertial mass .
  • the invention also relates to a regulating member for a clock movement, the regulating member comprising an elastic return element, and such an inertial mass.
  • the elastic return element is for example a spiral spring whose frequency is preferably 3 Hz, or a flexible guide whose frequency is preferably at least 10 Hz.
  • the invention also relates to a clock movement comprising such a regulating member.
  • the invention relates to an inertial mass 1, in particular for a clock movement, intended to be mounted on a regulating member 10 in which it is subjected to a rotary oscillating movement.
  • the inertial mass 1 extends substantially in a plane and comprises a rigid main body 2.
  • the main body 2 is for example a pendulum conventionally used in regulating organs.
  • the main body 2 then has an annular shape, preferably circular.
  • the inertial mass 1 comprises at least one flexible inertial element 3 assembled to the main body 2.
  • each flexible inertial element 3, 13 comprises two flexible inertial element 3, 13 arranged symmetrically with respect to the center of the ring inside the main body 2.
  • Each flexible inertial element 3, 13 is assembled on the internal wall of the main body 2.
  • each flexible inertial element 3, 13 extends along the wall of the main body 2.
  • the flexible inertial element 3, 13 is arranged in the same plane as the main body 2.
  • the two flexible inertial elements 3, 13 are configured to allow the regulator member, equipped with this inertial mass 2, to keep a frequency of the oscillations substantially constant as a function of the amplitude of the oscillations.
  • the frequency remains substantially constant over time.
  • the inertial elements 3, 13 deform more or less depending on the amplitude and the speed of oscillation of the inertial mass. Thus, they influence the frequency of oscillation so as to keep it constant.
  • Each flexible inertial element 3, 13 comprises a flexible part 11, 21 and a rigid counterweight 4, 14, the flexible part 11, 21 connecting the rigid counterweight 4, 14 to the main body 2.
  • the rigid counterweight 4, 14 is heavier than the flexible part 11, 21.
  • the rigid flyweight 4, 14 is preferably ten times lighter than the main body 2, or even at least twenty times lighter.
  • the flexible part 11, 21 comprises a first flexible blade 5, 15 connected by one end to the flyweight 4, 14, as well as a rigid portion 6, 16 connected to the other end of the first flexible blade 5, 15. more, the flexible part 11, 21 comprises a second flexible blade 7, 17 connecting the rigid portion 6, 16 to the main body 2 by its ends.
  • the second flexible blade 7, 17 is smaller than the first flexible blade 5, 15.
  • the first flexible strip 5, 15 has the shape of an arc of a circle, and extends along the curvature of the main body 2, substantially parallel.
  • the second flexible blade 7, 17 extends towards the inside of the ring perpendicular to the rigid body 2 according to the normal.
  • the rigid portion 6, 16 has an arcuate oblong shape extending along the annular main body 2 in a direction opposite to that of the first flexible blade 5, 15.
  • the second flexible blade 7, 17 is joined perpendicularly to a first end of the rigid portion 6, 16.
  • the first flexible blade 5, 15 is also joined to this first end in the extension of the rigid portion 6, 16.
  • the rigid portion 6, 16 comprises a second free end opposite the first .
  • each element of a flexible inertial element 3, 13 is arranged in the main body 2 by rotational symmetry with respect to the other flexible inertial element 3, 13.
  • the weights 4, 14 also oscillate thanks to the flexible part 11, 21. This oscillation makes it possible to modify the geometry of the inertial mass according to its amplitude of oscillation.
  • the inertial mass 1 comprises means for adjusting the position of each flexible inertial element 3, 13 relative to the main body 2.
  • the adjustment means make it possible to modify the position of the flyweights 4, 14 by relative to the main body 2.
  • the adjustment means are configured to apply a variable force or torque to each flexible inertial element 3, 13.
  • the adjustment means are configured to apply a variable force or torque to the rigid portion 6, 16 of the flexible part 11, 21.
  • the variable force or torque is substantially oriented perpendicular to the direction of extension of the flexible inertial element 3, 13.
  • the adjustment means comprise two bearing screws 8, 18 that can be adjusted longitudinally, each bearing screw 8, 18 being configured to bear against the flexible inertial element 3, 13, more precisely against the portion rigid 6, 16 of the flexible part 11, 21, at the free end.
  • the two bearing screws 8, 18 are also arranged by rotational symmetry.
  • the adjustment screw 8, 18 passes through the main body 2 to reach the flexible inertial element 3, 13. Thus, the adjustment is carried out by rotating the support screw 8, 18 from outside the main body 2.
  • the support screw 8 By actuating the support screw 8, 18, the latter applies a greater or lesser force to the rigid portion 6, 16, so as to move the flyweight 4, 14 and the first flexible blade 5, 15 relative to the main body 2, the second flexible blade 7, 17 acting as a pivot.
  • the first flexible blade 5, 15 and the flyweight 4, 14 approach or move away from the main body 2. Consequently, the effect produced by the inertial element can be modified slightly to adjust the slope of isochronism d amplitude of the regulating organ 10.
  • the weights 4, 14 are farther from the main body 2, because the support screws 8, 18 apply a lower force on the rigid portions 6, 16.
  • the flyweights 4, 14 are closer to the main body 2, because the bearing screws 8, 18 apply a greater force to the rigid portions 6, 16.
  • the inertial mass comprises at least one additional flyweight, preferably two additional flyweights, arranged on the annular body, the second additional flyweight having an adjustable position on the annular body to modify the inertia of the inertial mass.
  • the two weights are for example screws 9, 19 inserted into the main body 2, and arranged by circular symmetry. By actuating the screws 9, 19 from the outside, the inertia of the inertial mass is modified. Thus, it is possible to adjust the rate or the frequency of the regulating organ.
  • the two weights can also be eccentric screws.
  • FIG. 3 shows a regulating member 10 of a mechanical watch movement, the member comprising an inertial mass 1 according to the invention, mounted on a rotary axis 23.
  • the regulating member 10 is assembled on a plate 29, and it comprises a elastic return element of the inertial mass 10, here a spiral spring 25 arranged parallel to the inertial mass 10.
  • the main body 2 is provided with a diametral arm 26 passing through the interior of the main body 2. In the middle of the diametral arm 26 , a ring 24 allows the assembly to the rotary axis 23.
  • the spiral spring 25 comprises a blade wound on itself, an inner end being assembled to the rotary shaft 23, and an outer end being connected to a stud 27.
  • the regulating member 10 preferably has a frequency of 3Hz.
  • the invention also relates to a resonator mechanism, in particular for a clock movement, not shown in the figures.
  • the resonator mechanism is provided with a flexible guide according to one of the embodiments described above.
  • the regulator member could comprise a flexible guide as an elastic return element, instead of the spiral spring.
  • the flexible guide is for example a pivot with crossed blades.
  • the flexible guide has a frequency of at least 10Hz.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Clocks (AREA)
  • Vibration Prevention Devices (AREA)
EP21191261.3A 2021-08-13 2021-08-13 Masse inertielle munie d'un element inertiel flexible, notamment pour l' horlogerie Pending EP4134754A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP21191261.3A EP4134754A1 (fr) 2021-08-13 2021-08-13 Masse inertielle munie d'un element inertiel flexible, notamment pour l' horlogerie
JP2022109601A JP7429263B2 (ja) 2021-08-13 2022-07-07 特に計時器のための、フレキシブルな慣性要素を備える慣性錘
US17/865,878 US20230052485A1 (en) 2021-08-13 2022-07-15 Inertial mass equipped with a flexible inertial element, particularly for horology
CN202222112775.0U CN218350720U (zh) 2021-08-13 2022-08-11 惯性质量体、调速机构和钟表机芯
KR1020220100628A KR20230025357A (ko) 2021-08-13 2022-08-11 특히 측시를 위한 가요성 관성 요소가 구비된 관성 매스
CN202210966832.3A CN115933348A (zh) 2021-08-13 2022-08-11 尤其用于钟表业的配备有柔性惯性元件的惯性质量体

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP21191261.3A EP4134754A1 (fr) 2021-08-13 2021-08-13 Masse inertielle munie d'un element inertiel flexible, notamment pour l' horlogerie

Publications (1)

Publication Number Publication Date
EP4134754A1 true EP4134754A1 (fr) 2023-02-15

Family

ID=77338547

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21191261.3A Pending EP4134754A1 (fr) 2021-08-13 2021-08-13 Masse inertielle munie d'un element inertiel flexible, notamment pour l' horlogerie

Country Status (5)

Country Link
US (1) US20230052485A1 (ja)
EP (1) EP4134754A1 (ja)
JP (1) JP7429263B2 (ja)
KR (1) KR20230025357A (ja)
CN (2) CN218350720U (ja)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1104040A (fr) * 1954-04-15 1955-11-15 Balancier perfectionné pour mouvement d'horlogerie
FR1128060A (fr) * 1955-06-21 1957-01-02 Balancier perfectionné pour mouvement d'horlogerie
FR1322923A (fr) * 1962-02-20 1963-04-05 Dispositif de réglage par inertie variable des balanciers de mouvements d'horlogerie et similaires
CH708657A1 (fr) * 2013-10-02 2015-04-15 Sercalo Microtechnology Ltd Balancier pour mouvement d'horlogerie à moment d'inertie ajustable.
CH709052B1 (fr) * 2013-12-27 2019-09-30 Seiko Instr Inc Balancier-spiral, mouvement et pièce d'horlogerie.

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US965506A (en) * 1908-10-22 1910-07-26 Frederic Ecaubert Compensating balance for timepieces.
US1176527A (en) * 1914-02-11 1916-03-21 Frederic Ecaubert Compensating balance-wheel.
US1859866A (en) * 1926-02-06 1932-05-24 Solvil Des Montres Paul Ditish Regulating device for clockworks
DE60227912D1 (de) * 2002-03-21 2008-09-11 Chopard Manufacture Sa Unruh mit Verstellmechanismus
EP2410387B1 (fr) * 2010-07-19 2016-07-06 Nivarox-FAR S.A. Balancier à réglage d'inertie sans insert
CH704131B1 (fr) * 2010-11-25 2015-06-15 Complitime Sa Balancier pour pièce d’horlogerie.
JP5831982B2 (ja) * 2011-12-26 2015-12-16 セイコーインスツル株式会社 てんぷ及び機械式時計
CN107505826B (zh) * 2013-02-25 2020-06-30 精工电子有限公司 温度补偿型摆轮及其制造方法、钟表用机芯、机械式钟表
EP3032349B1 (fr) * 2014-12-11 2023-02-22 Blancpain SA. Mécanisme d'entraînement d'un organe sautant
CH713150A2 (fr) * 2016-11-23 2018-05-31 Eta Sa Mft Horlogere Suisse Mécanisme régulateur à résonateur rotatif à guidage flexible entretenu par un échappement libre à ancre.
JP6789140B2 (ja) 2017-01-31 2020-11-25 セイコーインスツル株式会社 温度補償型てんぷ、ムーブメント及び時計
JP7217170B2 (ja) 2019-02-25 2023-02-02 セイコーインスツル株式会社 温度補償型てんぷ、ムーブメント及び時計

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1104040A (fr) * 1954-04-15 1955-11-15 Balancier perfectionné pour mouvement d'horlogerie
FR1128060A (fr) * 1955-06-21 1957-01-02 Balancier perfectionné pour mouvement d'horlogerie
FR1322923A (fr) * 1962-02-20 1963-04-05 Dispositif de réglage par inertie variable des balanciers de mouvements d'horlogerie et similaires
CH708657A1 (fr) * 2013-10-02 2015-04-15 Sercalo Microtechnology Ltd Balancier pour mouvement d'horlogerie à moment d'inertie ajustable.
CH709052B1 (fr) * 2013-12-27 2019-09-30 Seiko Instr Inc Balancier-spiral, mouvement et pièce d'horlogerie.

Also Published As

Publication number Publication date
KR20230025357A (ko) 2023-02-21
JP7429263B2 (ja) 2024-02-07
CN115933348A (zh) 2023-04-07
JP2023026331A (ja) 2023-02-24
US20230052485A1 (en) 2023-02-16
CN218350720U (zh) 2023-01-20

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