EP4310599A1 - Regulierorgan für uhrwerk mit flexibler führung und temperaturausgleichsmitteln - Google Patents

Regulierorgan für uhrwerk mit flexibler führung und temperaturausgleichsmitteln Download PDF

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Publication number
EP4310599A1
EP4310599A1 EP22186291.5A EP22186291A EP4310599A1 EP 4310599 A1 EP4310599 A1 EP 4310599A1 EP 22186291 A EP22186291 A EP 22186291A EP 4310599 A1 EP4310599 A1 EP 4310599A1
Authority
EP
European Patent Office
Prior art keywords
regulating member
member according
elastic
flexible
movable element
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
EP22186291.5A
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 EP22186291.5A priority Critical patent/EP4310599A1/de
Priority to JP2023105652A priority patent/JP7569892B2/ja
Priority to US18/348,853 priority patent/US20240027967A1/en
Priority to CN202310904764.2A priority patent/CN117434813A/zh
Publication of EP4310599A1 publication Critical patent/EP4310599A1/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
    • G04B17/20—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
    • G04B31/00—Bearings; Point suspensions or counter-point suspensions; Pivot bearings; Single parts therefor

Definitions

  • the invention relates to a watchmaking regulating member with flexible guidance provided with temperature compensation means.
  • the sprung balance constitutes the time base of the watch. It is also called a resonator or regulating organ.
  • a spiral spring plays the role of an elastic return element for the inertial element that constitutes a balance wheel. This balance wheel is guided in rotation by pivots, which generally rotate in plain ruby bearings.
  • 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 variation in frequency of the resonator results in an error in the measurement of time.
  • 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, such as temperature.
  • the aim of the present invention is to overcome all or part of the disadvantages cited above by proposing a watchmaking regulating member with flexible guidance provided with precise temperature compensation means, adaptable to flexible guides.
  • the invention relates to a timepiece regulating member for a timepiece movement comprising an oscillating mass, for example a balance wheel, a flexible guide comprising at least two main flexible blades connecting a movable support to the oscillating mass for allow the oscillating mass to perform a rotary movement around a virtual pivot.
  • an oscillating mass for example a balance wheel
  • a flexible guide comprising at least two main flexible blades connecting a movable support to the oscillating mass for allow the oscillating mass to perform a rotary movement around a virtual pivot.
  • the regulating member comprises an elastic device for compensating the temperature arranged so to connect the support to means for fixing the regulating member to the clock movement, the elastic compensation device being configured to adapt its stiffness as a function of the temperature in order to compensate for the effect of the temperature on the member regulating.
  • 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 flexible guide is modified.
  • the action of the regulating member is adjusted. Consequently, when the temperature changes, the elastic device is mechanically impacted to adjust the operation of the regulating organ to this change.
  • the effective rigidity of the resonator includes the rigidity of the flexible guide and the rigidity of the elastic element.
  • the variable force or torque makes it possible to pre-stress the elastic element, preferably without pre-stressing the flexible guide and without moving the end of the flexible guide. By pre-stressing the elastic element, its rigidity changes, while the rigidity of the flexible guide remains unchanged, since it is not pre-stressed and its end does not move.
  • the rigidity of the resonator (rigidity of the flexible guide and rigidity of the elastic element) changes, which consequently modifies the operation of the resonator.
  • the elastic element being preferably more rigid than the flexible guide, the share of the flexibility of the elastic element in the overall rigidity is less than that of the flexible guide. Consequently, a modification of the rigidity of the elastic element modifies the rigidity of the entire resonator, and by therefore regulates its operation finely, which allows us to precisely adjust the frequency of our time base. We thus obtain great precision in maintaining operation as a function of temperature.
  • the elastic compensation device comprises an elastic element arranged between the support and the fixing means, as well as prestressing means for applying a variable force or torque on the elastic element in function of temperature.
  • the prestressing means comprise a spring part connected to the movable support, the spring part transmitting the force or torque to the elastic element via the movable support, the spring part, the mobile support and the elastic element being arranged on the same axis.
  • 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.
  • the deformable body is an elongated bimetallic strip.
  • the spring part comprises a first flexible blade connected to the mobile support.
  • the spring part comprises a first translation table connected to the first flexible blade.
  • the deformable body is in contact with the first translation table.
  • the spring part comprises a spring arranged between the deformable body and the first translation table.
  • the first translation table comprises a first movable element connected to the first flexible blade.
  • the elastic part comprises a first movable element connected to the first flexible blade, a second movable element, and a second flexible blade connected to the thermally deformable body, the first movable element and the second element movable being connected by a pair of parallel flexible blades.
  • the elastic part comprises a second flexible blade connected to the thermally deformable body and to the second movable element.
  • the regulating member comprises means for adjusting the prestressing means to apply a variable force on the prestressing means, for example on the first elongated movable element.
  • the adjustment means comprise a second translation table arranged at one end of the deformable body, the variable force being applied to the second translation table.
  • the two main blades of the flexible guide are crossed.
  • the regulating member extends substantially in the same plane, except for the oscillating mass.
  • the elastic element comprises a pair of uncrossed blades connecting the support to the fixing means.
  • the invention also relates to a watch movement comprising such a regulating member.
  • THE figures 1 to 3 represent three embodiments of a regulating member 1, 10, 20 according to the invention, the regulating member 1, 10, 20 comprising an elastic device 50 configured to compensate for a thermal variation exerted on the regulating member 1, 10 , 20.
  • Such regulating members 1, 10, 20 are intended to be arranged in a clockwork movement to regulate it.
  • the regulating member 1, 10, 20 comprises a flexible guide 2 and an oscillating mass, for example example an annular balance or a bone-shaped member comprising a main arm and two ends extending on each side of the central arm, the oscillating mass not being shown in the figures.
  • an oscillating mass for example example an annular balance or a bone-shaped member comprising a main arm and two ends extending on each side of the central arm, the oscillating mass not being shown in the figures.
  • the regulating member 1, 10, 20 extends substantially in the same plane, except for the oscillating mass, which oscillates in a parallel plane, preferably above the flexible guide 2.
  • the flexible guide 2 comprises two main flexible blades 9, and a rigid support 3.
  • the flexible guide extends along an axis of symmetry substantially perpendicular to the main axis of the regulating member 1, 10, 20.
  • the flexible blades 9 are joined on the one hand to the rigid support 3 of the flexible guide 2 and on the other hand to a fastener 8 intended to associate the oscillating mass.
  • the two main blades 9 of the flexible guide 2 are crossed, preferably straight and of the same length.
  • the rigid support 3 has a U shape, the main flexible blades 2 being connected inside the base of the U, and extending outside the U to the attachment 8.
  • the regulating member 1, 10, 20 comprises an elastic device 50 for compensating the temperature, the elastic device being arranged on either side of the rigid support 3 so as to connect the rigid support 3 to fixing means 7 of the regulating member 1, 10, 20 on the clock movement.
  • the fixing means 7 are for example an elongated body intended to be assembled to the plate.
  • the elastic compensation device 50 is configured to adapt its stiffness as a function of the temperature in order to compensate for the effect of temperature on the regulating member 1, 10, 20.
  • the elastic compensation device 50 preferably has a stiffness greater than the blades main flexibles 9 crossed.
  • the elastic compensation device 50 comprises an elastic element 5 arranged between the rigid support 3 and the fixing means 7, thus as prestressing means 6 to apply a variable force or torque on the elastic element 5 and the rigid support 3 as a function of the temperature.
  • the elastic element 5 comprises a pair of uncrossed blades 4 connecting the rigid support 3 to the fixing means 7.
  • the elastic element 5 is connected to a first external side of the U, and extends perpendicular to the flexible guide 2.
  • the blades uncrossed 4 extend from the rigid support 3 to the fixing means 7, moving away from each other.
  • the prestressing means 6 comprise a spring part provided with a flexible blade 11 connected to the second external side of the U.
  • the first flexible blade 11 extends perpendicular to the flexible guide 2.
  • the spring part of the prestressing means 6 comprises a first translation table 33 provided with a first movable element 12 in the shape of an L and a second stationary support 13 relative to the movement plate.
  • 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 first translation table 33 comprises a pair of parallel blades 14, connecting the interior of the first arm of the L to the second stationary support 13.
  • the first movable element 12 is guided by the parallel blades 14, when it moves.
  • 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 34 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 bimetal bends or straightens, so that the first free part 54 exerts a force on the protrusion, and therefore on the first movable element 12, which is moves while being guided by the first translation table 33.
  • 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 external parameter, here the temperature.
  • the second embodiment of regulating organ 10 of the figure 2 is similar to the first embodiment.
  • the difference lies in the first translation table 33, which is not directly in contact with the mobile body 15, and does not carry any protrusion.
  • the prestressing means 6 further comprise a spring 21 connecting the first movable element 12 to a movable body 22 comprising a projection 53 similar to the first embodiment.
  • Spring 21 provides additional flexibility.
  • the mobile body 22 is held between two walls 23 which guide the movement of the mobile body 22.
  • the protrusion 53 is not on the first movable element 12, but on the movable body 22, the first movable element not being in direct contact with the deformable body 15.
  • the bimetallic strip when it curves or straightens, it exerts a more or less significant force on the movable body 22, which moves between the guide walls 23, and transmits a more or less significant force to the first movable element 12 via the spring 21.
  • the operation is the same as for the first embodiment.
  • the elastic element 5 experiences a variable force or torque, which modifies its stiffness, and therefore that of the flexible guide 2.
  • the spring part of the prestressing means 6 comprises a first elongated movable element 29, connected to the flexible blade 11 by one end and arranged in its extension.
  • a first pair of parallel flexible blades 25 connects the first movable element 29 to a second movable element 28.
  • the second movable element 28 is connected to the thermally deformable body 15 by a second flexible blade 31, which is substantially parallel to the first movable element 29.
  • the thermally deformable body 15 is preferably also a bimetallic strip arranged perpendicularly to the second flexible blade 31 and to the first elongated movable element 29.
  • the second flexible blade 31 is connected to the top of the free part of the bimetallic strip, the latter being held by a fixed support 32 at its base.
  • the second flexible blade 31 transmits a movement to the second movable element 28, which transmits a force to the first elongated movable element 29 by the second pair of parallel flexible blades 25.
  • the temperature variation will cause a modification in the stiffness of the elastic element 5, and therefore in the operation of the regulating member.
  • a third pair of parallel flexible blades 26 connects the second movable element 28 to a third stationary element 27 relative to the movement plate.
  • the third pair of parallel flexible blades 26 and the third movable element 27 are superimposed on the second pair of parallel flexible blades 25 and the second movable element 28.
  • the second movable element 28 and the two parallel flexible blades 26 form a translation table, the second movable element 28 being guided in translation relative to the third stationary element 27 to transmit a movement to the first elongated movable element 29 via the second pair of parallel flexible blades 25.
  • the first elongated movable element 29 transmits a force or torque to the elastic element 5 through the first flexible blade 11.
  • Adjustment means such as a screw, can be added to exert a force 49 on the first elongated movable element 29.
  • 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 regulating member 1, 10, 20 as described above.
  • the flexible blades are preferably straight.
  • flexible blades of the same type are preferably of the same length.
  • Flexible blades can be continuously flexible or have flexible portions only, such as necks.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Metallurgy (AREA)
  • Electric Clocks (AREA)
  • Thermally Actuated Switches (AREA)
EP22186291.5A 2022-07-21 2022-07-21 Regulierorgan für uhrwerk mit flexibler führung und temperaturausgleichsmitteln Pending EP4310599A1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP22186291.5A EP4310599A1 (de) 2022-07-21 2022-07-21 Regulierorgan für uhrwerk mit flexibler führung und temperaturausgleichsmitteln
JP2023105652A JP7569892B2 (ja) 2022-07-21 2023-06-28 温度補償手段があるフレキシブルガイドを備える計時器用調速メンバー
US18/348,853 US20240027967A1 (en) 2022-07-21 2023-07-07 Regulating horological member with flexible guide provided with temperature-compensation means
CN202310904764.2A CN117434813A (zh) 2022-07-21 2023-07-21 具有设置有温度补偿装置的柔性引导件的钟表调节构件

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22186291.5A EP4310599A1 (de) 2022-07-21 2022-07-21 Regulierorgan für uhrwerk mit flexibler führung und temperaturausgleichsmitteln

Publications (1)

Publication Number Publication Date
EP4310599A1 true EP4310599A1 (de) 2024-01-24

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP22186291.5A Pending EP4310599A1 (de) 2022-07-21 2022-07-21 Regulierorgan für uhrwerk mit flexibler führung und temperaturausgleichsmitteln

Country Status (4)

Country Link
US (1) US20240027967A1 (de)
EP (1) EP4310599A1 (de)
JP (1) JP7569892B2 (de)
CN (1) CN117434813A (de)

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.
EP2911012A1 (de) 2014-02-20 2015-08-26 CSEM Centre Suisse d'Electronique et de Microtechnique SA - Recherche et Développement Oszillator einer Uhr
CH716434A2 (fr) * 2019-07-29 2021-01-29 Eta Sa Mft Horlogere Suisse Dispositif de guidage en pivotement et mécanisme résonateur d'horlogerie pour une masse pivotante.
CH716725A2 (fr) * 2019-10-24 2021-04-30 Swatch Group Res & Dev Ltd Dispositif de guidage en pivotement pour une masse pivotante et mécanisme résonateur d'horlogerie.

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015143673A (ja) 2013-12-27 2015-08-06 セイコーインスツル株式会社 てんぷ、ムーブメント、および時計

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.
EP2911012A1 (de) 2014-02-20 2015-08-26 CSEM Centre Suisse d'Electronique et de Microtechnique SA - Recherche et Développement Oszillator einer Uhr
CH716434A2 (fr) * 2019-07-29 2021-01-29 Eta Sa Mft Horlogere Suisse Dispositif de guidage en pivotement et mécanisme résonateur d'horlogerie pour une masse pivotante.
CH716725A2 (fr) * 2019-10-24 2021-04-30 Swatch Group Res & Dev Ltd Dispositif de guidage en pivotement pour une masse pivotante et mécanisme résonateur d'horlogerie.

Also Published As

Publication number Publication date
US20240027967A1 (en) 2024-01-25
JP2024014753A (ja) 2024-02-01
JP7569892B2 (ja) 2024-10-18
CN117434813A (zh) 2024-01-23

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