EP4310600A1 - Regulierorgan für uhrwerk mit spiralfeder, das mit temperaturausgleichsmitteln ausgestattet ist - Google Patents

Regulierorgan für uhrwerk mit spiralfeder, das mit temperaturausgleichsmitteln ausgestattet ist Download PDF

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Publication number
EP4310600A1
EP4310600A1 EP22186309.5A EP22186309A EP4310600A1 EP 4310600 A1 EP4310600 A1 EP 4310600A1 EP 22186309 A EP22186309 A EP 22186309A EP 4310600 A1 EP4310600 A1 EP 4310600A1
Authority
EP
European Patent Office
Prior art keywords
regulating member
temperature
elastic element
member according
ribbon
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
EP22186309.5A
Other languages
English (en)
French (fr)
Inventor
Gianni Di Domenico
Baptiste Hinaux
Mohammad Hussein Kahrobaiyan
Jean-Luc Helfer
Pascal Winkler
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.)
Swatch Group Research and Development SA
Original Assignee
Swatch Group Research and Development SA
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 Swatch Group Research and Development SA filed Critical Swatch Group Research and Development SA
Priority to EP22186309.5A priority Critical patent/EP4310600A1/de
Priority to US18/346,502 priority patent/US20240027966A1/en
Priority to JP2023109748A priority patent/JP2024014767A/ja
Priority to CN202310904923.9A priority patent/CN117434814A/zh
Publication of EP4310600A1 publication Critical patent/EP4310600A1/de
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
    • 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
    • G04B17/20—Compensation of mechanisms for stabilising frequency
    • G04B17/22—Compensation of mechanisms for stabilising frequency for the effect of variations of temperature
    • 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
    • G04B17/045—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
    • G04B17/06—Oscillators with hairsprings, e.g. balance
    • G04B17/063—Balance construction
    • 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
    • G04B17/22—Compensation of mechanisms for stabilising frequency for the effect of variations of temperature
    • G04B17/222—Compensation of mechanisms for stabilising frequency for the effect of variations of temperature with balances

Definitions

  • the invention relates to a spiral spring regulating member provided with temperature compensation means, particularly for watchmaking.
  • the sprung balance constitutes the time base of the watch. It is also called a resonator or regulating organ.
  • a frequency is chosen for the mechanical resonator, which is determined to obtain a predefined rate for the clock movement.
  • such a mechanical resonator may be subject to disturbances caused by changes in external parameters, which generate variations in frequency of the resonator. These parameters are for example temperature, pressure, humidity, or gravity.
  • the frequency variation of the resonator results in an error in the measurement of time and therefore in the running of the clock movement.
  • the document CH 704687 describes a regulating member comprising a spiral spring and a member for correcting the position of the eyebolt to correct deformations of the spiral spring due to certain parameters, in particular temperature.
  • the aim of the present invention is to overcome all or part of the drawbacks cited above by proposing a watchmaking regulating organ with a spiral spring provided with more precise temperature compensation means.
  • the invention relates to a rotary regulating member for a timepiece movement comprising an oscillating mass, for example a balance wheel, a spiral spring comprising a flexible ribbon wound on itself in several turns, the ribbon having a predefined rigidity to allow the oscillating mass to perform a rotary oscillatory movement, the ribbon comprising an external end.
  • an oscillating mass for example a balance wheel
  • a spiral spring comprising a flexible ribbon wound on itself in several turns
  • the ribbon having a predefined rigidity to allow the oscillating mass to perform a rotary oscillatory movement
  • the ribbon comprising an external end.
  • the regulating member comprises an elastic temperature compensation device configured to adapt its stiffness as a function of the temperature in order to compensate for the effect of the temperature on the regulating member, the elastic device comprising an elastic element connecting the external end to a first support stationary with respect to the clockwork movement, as well as prestressing means for applying a variable force or torque on the elastic element as a function of the temperature.
  • the prestressing means exert a variable force or torque on the elastic element as a function of the temperature, so that the regulating member substantially maintains a precise course despite significant changes in the temperature.
  • the prestressing means modify the force or the torque exerted on the elastic element, so that the stiffness of the assembly comprising the elastic element and the spiral spring is modified.
  • the effective stiffness of the resonator includes the stiffness of the ribbon and the stiffness of the elastic element.
  • the variable force or torque allows the elastic element to be pre-stressed, preferably without pre-stressing the tape and without moving the end of the tape. By pre-stressing the elastic element, its rigidity changes, while the rigidity of the ribbon remains unchanged, since it is not pre-stressed and its end does not move.
  • the stiffness of the resonator (ribbon stiffness and stiffness of the elastic element) changes, which consequently changes the action of the resonator.
  • the elastic element being preferably more rigid than the ribbon, the share of the rigidity of the elastic element in the overall rigidity is less than that of the ribbon. Consequently, a modification of the rigidity of the elastic element modifies the rigidity of the entire resonator, and consequently fine-tunes its operation, which makes it possible to precisely adjust the frequency of our time base. We thus obtain great precision in maintaining operation as a function of temperature.
  • the prestressing means comprise a spring part connected to the elastic element, the spring part transmitting the force or the torque to the elastic element.
  • the prestressing means comprise a deformable body as a function of the temperature, the deformable body being at least partly in contact with the spring part during deformation.
  • the deformable body is an elongated bimetallic strip.
  • the spring part comprises a first flexible blade connected to the elastic element.
  • the spring part comprises a translation table connected to the first flexible blade, the deformable body being in contact with the translation table.
  • the spring part comprises a second flexible blade connected to the thermally deformable body.
  • the regulating member extends substantially in the same plane.
  • the elastic element comprises a suspended point body and a pair of uncrossed blades connecting the suspended point body to the first immobile support.
  • the prestressing means are connected to the suspended point body to exert the force or the torque on the suspended point body.
  • the regulating member comprises means for adjusting the prestressing means for apply a variable force on the prestressing means, for example on the first movable element.
  • the invention also relates to a watch movement comprising such a regulating member.
  • the regulating member 1, 10 comprises a spiral spring provided with a flexible ribbon 2 wound on itself in several turns.
  • the flexible ribbon 2 comprises an external end 9 and an internal end 8.
  • the regulating member 1, 10 comprises an oscillating mass, for example an annular balance, not shown in the figures, which is connected to the internal end 8 of the ribbon 2, the ribbon 2 having a predefined rigidity to allow the oscillating mass to perform a rotary oscillatory movement.
  • the oscillating mass comprises an axial rotation shaft, the internal end 8 of the ribbon 2 being connected to said shaft.
  • the regulating member 1, 10 extends substantially in the same plane, except for the oscillating mass, which oscillates in a parallel plane, above the spiral spring.
  • the regulating member 1, 10 comprises an elastic device 50 for compensating an external parameter configured to adapt the stiffness of the elastic element 5 as a function of the temperature in order to compensate for the effect of the temperature on the regulating organ 1, 10.
  • the elastic device 50 comprises an elastic element 5 connecting the external end 9 to a stationary support 7 relative to the watch movement, for example to a plate.
  • the elastic device 50 further comprises prestressing means 6 for applying a variable force or torque to the elastic element 5 as a function of the external parameter.
  • the elastic element 5 here comprises a suspended point body 3 and a pair of uncrossed blades 4 connecting the suspended point body 3 to the immobile support 7.
  • the suspended point body 3 is for example a cylindrical body of height substantially equal to the diameter, the blades uncrossed 4 moving away from the suspended point body 3 to the immobile support 7.
  • the elastic element 5 is arranged in the extension of the flexible ribbon 2, the spiral spring and the elastic element 5 being adjacent, but avoiding contact during the oscillation of the oscillating mass.
  • the prestressing means 6 are configured to exert the force or torque on the suspended point body 3.
  • the prestressing means 6 comprise a spring part provided with a flexible blade 11 connected to the suspended point body 3.
  • the first flexible blade 11 s 'extends in the axis of the elastic element, tangentially to the spiral spring, and is slightly offset relative to the external end 9.
  • the spring part of the prestressing means 6 comprises a translation table provided with a first movable element 12 in the shape of an L and a second immobile support 13 relative to the movement.
  • the first movable element 12 is connected to the flexible blade 11 by one end of a first arm of the L.
  • the second arm of the L includes a rounded projection 53 on the external side.
  • the translation table comprises two substantially parallel flexible blades 14 connecting the first movable element 12 to the second stationary support 13.
  • the prestressing means 6 further comprise a thermally deformable body 15 as a function of the temperature, the deformable body 15 exerting the variable force or torque on the movable element 12.
  • the thermally deformable body 15 is a bimetal whose deformation is caused by the temperature.
  • the bimetallic strip has a body extending longitudinally, and comprises two elongated parts 51, 52 associated longitudinally.
  • the two elongated parts 51, 52 are each formed of a different material, with thermal deformation properties different from each other.
  • the bimetallic strip deforms laterally, one end 55 of the bimetallic strip being retained, the other end being able to move and deform the bimetallic strip to bend it to one side.
  • the bimetallic strip is arranged perpendicular to the movable element 12, so that a first free part 54 is in contact with the protrusion 53 of the second arm of the L.
  • the retained end 55 is held by a second translation table comprising a second movable element 18 and a second pair 17 of parallel flexible blades connecting the second movable element 18 to a third immobile support 19 relative to the movement plate.
  • the second movable element 18 has an L shape, one arm of the L supporting the retained end 55 of the bimetallic strip, while the blades of the second pair 17 of blades connect the internal face 56 of the second arm to the third immobile support 19.
  • the blades of the second pair 17 of blades are arranged perpendicular to the bimetallic strip in the rest position of the prestressing means 6.
  • the deformable body 15, here the bimetallic strip bends or straightens, so that the first free part 54 exerts a more or less significant force on the protrusion, and therefore on the first movable element. 12, which moves while being guided by the first translation table.
  • the elastic element 5 receives a force or a torque modifying its stiffness and therefore the operation of the regulating member 1.
  • Adjustment means such as a screw, can be added to exert a force 57 on the second movable element 18, in particular at the end of the second arm 58, parallel to the longitudinal axis of the bimetallic strip.
  • the effective length d of the bimetallic strip can be adjusted to adjust the effect of the prestressing means 6 on the elastic element 5, in particular as a function of the temperature.
  • the free part 54 pushes the first movable element 12, so that the first flexible blade 11 transmits a force or a torque on the suspended point body 3.
  • the stiffness of the pair of uncrossed blades 4 decreases.
  • the force or torque on the suspended point body 3 decreases, so that the stiffness of the pair of uncrossed blades 4 increases.
  • the regulating member 10 comprises a spiral spring, an oscillating mass (not shown in the figure), an elastic element 5, and a first flexible blade 11 identical to the first embodiment.
  • the spring part of the prestressing means 6 comprises a first elongated movable element 22, connected to the flexible blade 11 and arranged in its extension.
  • a first pair of parallel flexible blades 24 connects the first movable element 22 to a second immobile support 23 to form a translation table and guide the movement of the first movable element 22.
  • the spring part comprises a second pair of parallel flexible blades 25 arranged on the same side as the first pair of parallel flexible blades 24, and connects the first movable element 22 to a second movable element 28.
  • the second movable element 28 is connected laterally to the thermally deformable body 15 by a second flexible blade 21 substantially parallel to the first movable element 22 in the rest position of the regulating member 10.
  • the deformable body is preferably also a bimetallic strip arranged perpendicularly to the second flexible blade 21 and to the first movable element 22.
  • the second flexible blade 21 is connected to the top of the free part of the bimetallic strip, the latter being held by a fixed support at its base.
  • the second flexible blade 21 transmits a movement to the second movable element 28, which transmits it to the first movable element 22 by the second pair of parallel flexible blades 25.
  • the first movable element 22 is guided by the first translation table to transmit the force or torque to the elastic element 5 through the first flexible blade 11.
  • the temperature variation will cause a deformation of the thermally deformable body 15, and a modification of the stiffness of the elastic element 5, and therefore of the operation of the regulating member 10.
  • a third pair of parallel flexible blades 26 connects the second movable element 28 to a third movable element 27.
  • the third pair of parallel flexible blades 26 and the third movable element 27 being arranged in series with the second pair of parallel flexible blades 25 and of the second mobile element 28.
  • Adjustment means such as a screw, can be added to exert a force 59 on the third movable element 27.
  • the adjustment means make it possible to adjust the sensitivity of the prestressing means 6 as a function of the temperature.
  • the invention also relates to a clock movement, not shown in the figures, the movement comprising a rotary regulating member 1, 10 as described above.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Metallurgy (AREA)
  • Electric Clocks (AREA)
  • Springs (AREA)
EP22186309.5A 2022-07-21 2022-07-21 Regulierorgan für uhrwerk mit spiralfeder, das mit temperaturausgleichsmitteln ausgestattet ist Pending EP4310600A1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP22186309.5A EP4310600A1 (de) 2022-07-21 2022-07-21 Regulierorgan für uhrwerk mit spiralfeder, das mit temperaturausgleichsmitteln ausgestattet ist
US18/346,502 US20240027966A1 (en) 2022-07-21 2023-07-03 Horological regulating member having a balance spring and provided with temperature-compensation means
JP2023109748A JP2024014767A (ja) 2022-07-21 2023-07-04 バランスばねと温度補償手段を備える計時器用調速機構
CN202310904923.9A CN117434814A (zh) 2022-07-21 2023-07-21 具有摆轮游丝并设置有温度补偿装置的钟表调节构件

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22186309.5A EP4310600A1 (de) 2022-07-21 2022-07-21 Regulierorgan für uhrwerk mit spiralfeder, das mit temperaturausgleichsmitteln ausgestattet ist

Publications (1)

Publication Number Publication Date
EP4310600A1 true EP4310600A1 (de) 2024-01-24

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ID=82656439

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22186309.5A Pending EP4310600A1 (de) 2022-07-21 2022-07-21 Regulierorgan für uhrwerk mit spiralfeder, das mit temperaturausgleichsmitteln ausgestattet ist

Country Status (4)

Country Link
US (1) US20240027966A1 (de)
EP (1) EP4310600A1 (de)
JP (1) JP2024014767A (de)
CN (1) CN117434814A (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH704687A1 (fr) 2011-03-23 2012-09-28 Lvmh Swiss Mft Sa Organe réglant pour pièce d'horlogerie.
CH717283B1 (fr) * 2011-03-23 2021-10-15 Lvmh Swiss Mft Sa Ensemble horloger comprenant un élément oscillant et un échappement.
EP4009115A1 (de) * 2020-12-02 2022-06-08 Omega SA Spiralfeder für resonatormechanismus eines uhrwerks, der mit mitteln zum ausgleichen der starrheit ausgestattet ist

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH704687A1 (fr) 2011-03-23 2012-09-28 Lvmh Swiss Mft Sa Organe réglant pour pièce d'horlogerie.
CH704687B1 (fr) * 2011-03-23 2015-11-30 Lvmh Swiss Mft Sa Organe réglant pour pièce d'horlogerie.
CH717283B1 (fr) * 2011-03-23 2021-10-15 Lvmh Swiss Mft Sa Ensemble horloger comprenant un élément oscillant et un échappement.
EP4009115A1 (de) * 2020-12-02 2022-06-08 Omega SA Spiralfeder für resonatormechanismus eines uhrwerks, der mit mitteln zum ausgleichen der starrheit ausgestattet ist

Also Published As

Publication number Publication date
JP2024014767A (ja) 2024-02-01
CN117434814A (zh) 2024-01-23
US20240027966A1 (en) 2024-01-25

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