EP4386486A1 - Spiralfeder für resonatormechanismus einer uhr mit mitteln zur einstellung der flexibilität und zugehörige materialien - Google Patents

Spiralfeder für resonatormechanismus einer uhr mit mitteln zur einstellung der flexibilität und zugehörige materialien Download PDF

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Publication number
EP4386486A1
EP4386486A1 EP22213757.2A EP22213757A EP4386486A1 EP 4386486 A1 EP4386486 A1 EP 4386486A1 EP 22213757 A EP22213757 A EP 22213757A EP 4386486 A1 EP4386486 A1 EP 4386486A1
Authority
EP
European Patent Office
Prior art keywords
ribbon
elastic element
spiral spring
flexibility
spring according
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
EP22213757.2A
Other languages
English (en)
French (fr)
Inventor
Pierre Cusin
Gianni Di Domenico
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.)
Omega SA
Original Assignee
Omega 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 Omega SA filed Critical Omega SA
Priority to EP22213757.2A priority Critical patent/EP4386486A1/de
Priority to JP2023202907A priority patent/JP7669456B2/ja
Priority to US18/536,500 priority patent/US20240201629A1/en
Priority to CN202311741492.5A priority patent/CN118210214A/zh
Publication of EP4386486A1 publication Critical patent/EP4386486A1/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
    • G04B17/32—Component parts or constructional details, e.g. collet, stud, virole or piton
    • G04B17/325—Component parts or constructional details, e.g. collet, stud, virole or piton for fastening the hairspring in a fixed position, e.g. using a block
    • 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
    • G04B17/066—Manufacture of the spiral spring
    • 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
    • G04B18/00—Mechanisms for setting frequency
    • G04B18/04—Adjusting the beat of the pendulum, balance, or the like, e.g. putting into beat
    • G04B18/06—Adjusting the beat of the pendulum, balance, or the like, e.g. putting into beat by setting the collet or the stud of a hairspring
    • 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
    • G04B18/08—Component parts or constructional details

Definitions

  • the invention relates to a spiral spring for a watch resonator mechanism, the spiral spring being provided with means for adjusting the flexibility of said spiral spring.
  • the invention also relates to a watch resonator mechanism provided with such a spiral spring.
  • the sprung balance constitutes the time base of the watch. It is also called a resonator mechanism or regulating organ.
  • the balance spring must generally be adjustable to improve the accuracy of a watch.
  • we use means for adjusting the flexibility of the spiral spring such as a racket to modify the effective length of the spring.
  • its flexibility is modified to adjust the running precision of the watch.
  • the effect of a traditional snowshoe to adjust gait 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 wheel.
  • screws By acting on the screws, we modify the inertia of the balance, which has the effect of modifying its course.
  • the adjustment means comprising an elastic element arranged in series with a wound flexible ribbon.
  • the elastic element is subjected to a variable prestress to modify its flexibility, and thus to be able to adjust the operation of the regulating member.
  • the prestressing means By acting on the prestressing means, the force or torque applied to the elastic element is modified, which results in a modification of the flexibility of the assembly comprising the elastic element and the ribbon.
  • the elastic element placed in series with the ribbon provides additional flexibility to the ribbon, which combines with that of the ribbon.
  • This spiral spring is in particular designed as a single piece, and coming from the same material, for example silicon, to facilitate its production.
  • the elastic element needs to be connected to the plate via a fixed support to be able to produce the prestress on the elastic element.
  • the aim of the present invention is to overcome all or part of the drawbacks cited above by proposing a spiral spring provided with effective and precise adjustment means, configured in particular to be able to be permanently assembled to the plate of a watch movement.
  • the invention relates to a spiral spring for a watch resonator mechanism, the spiral spring comprising a flexible ribbon wound on itself in several turns, the ribbon having a predefined flexibility, the spiral spring comprising means for adjusting its flexibility, the adjustment means comprising an elastic element arranged in series with the ribbon, the elastic element connecting one end of said ribbon to a fixed support, so as to add additional flexibility to the ribbon, elastic element preferably having a flexibility lower than that of the ribbon, the adjustment means comprising prestressing means to apply a variable force or torque on the element elastic without modifying the position of the end of the ribbon, so as to vary only the flexibility of the elastic element.
  • the invention is remarkable in that the elastic element and the ribbon are distinct and assembled together by assembly means.
  • the ribbon and the elastic element can be manufactured independently of each other, and connected by assembly means. It is therefore possible to choose different materials for the flexible ribbon and for the elastic element. For example, we can choose a more robust first material for the elastic element, in order to be able to use assembly means more resistant than glue.
  • assembly methods such as driving or screwing can be used to assemble the elastic element to a pin, without the risk of it deteriorating or breaking.
  • a less resistant material can be used for the ribbon of the spiral spring, such as silicon or silicon oxide, this material having other advantageous properties, in particular non-magnetic properties.
  • glue can be used to assemble the flexible ribbon to the elastic element, because the assembly junction between the ribbon and the elastic element is not subject to the prestressing means.
  • the elastic element is formed of a first material supporting assembly means generating stresses induced in the first material, such as driving or screwing.
  • the prestressing means are formed from the first material.
  • the first material is to be chosen from metals or metal alloys, such as nickel silver, Cube2, steel or nickel-based alloys (Ni, NiP, NiW). , or materials for LIGA type processes, such as Ni-based alloys, CuNiSn-based alloys, or a maraging type steel.
  • metals or metal alloys such as nickel silver, Cube2, steel or nickel-based alloys (Ni, NiP, NiW).
  • Ni, NiP, NiW nickel-based alloys
  • materials for LIGA type processes such as Ni-based alloys, CuNiSn-based alloys, or a maraging type steel.
  • the ribbon is formed of a second material different from the first material, for example comprising silicon or silicon oxide, preferably entirely.
  • the second material is of the Nivarox CT ® type or of the Nivachron ® type.
  • the ribbon and the elastic element are assembled by gluing as assembly means.
  • the elastic element is arranged at an external end of the ribbon.
  • the elastic element comprises a flexible guide provided with at least one flexible blade, preferably two uncrossed blades, and a rigid movable part to which the ribbon is connected.
  • the torque or the force is continuously adjustable by the prestressing means.
  • the prestressing means comprise a secondary flexible blade connected to the elastic element.
  • the prestressing means comprise a lever for adjusting the variable force or torque.
  • the elastic element is arranged in series in the extension of the ribbon.
  • the spiral spring extends substantially in a plane.
  • the adjustment means are actuable when the spiral spring is mounted on a plate of a watch movement.
  • the invention also relates to a rotary resonator mechanism, in particular for a watch movement, comprising an oscillating mass and such a spiral spring.
  • the elastic element is assembled with at least one eyebolt, for example by driving or screwing.
  • FIG. 1 shows a schematic representation of an embodiment of a resonator mechanism or regulating member 1 arranged in a clock movement 10.
  • the clock movement 10 comprises a plate 21, an inertial mass, an elastic return element of the inertial mass configured to make it oscillate, and a balance bridge 22.
  • the regulating member 1 further comprises an annular balance 23 as inertial mass, a balance shaft 24 and a spiral spring 25 as elastic return element.
  • the plate 21 is provided with a housing 26 for receiving the regulating member 1, in which the balance 23, the spiral spring 25, the balance bridge 22 are superimposed from the bottom upwards.
  • the balance shaft 24 is centered in the housing 26 and passes through the center of the balance 22, the spiral spring 25 and the balance bridge 22.
  • the balance shaft 24 is held by two anti-shock bearings 28 arranged at both ends of the balance shaft 24 A first bearing is arranged at the bottom of the housing 26, and the second bearing 28 is arranged above the housing 26, and is held by the balance bridge 22, the balance bridge 22 passing through the top of the housing 26. the central axis of the housing 26.
  • the balance bridge 22 is provided with a through hole in which the second bearing 28 is held.
  • the spiral spring 25 preferably extends substantially in a plane.
  • the spiral spring 25 comprises a flexible ribbon 2 wound on itself in several turns, the ribbon 2 having a predefined flexibility.
  • the internal end 9 of the ribbon 2 is made from material or assembled to a support 3.
  • the support 3 has a substantially triangular shape, and is threaded around the shaft of the balance 23.
  • the spiral spring 25 further comprises means for adjusting its flexibility.
  • the adjustment means can be activated by a user when the regulating member is mounted on the plate of the clock movement.
  • the adjustment means comprise an elastic element 5 arranged in series with the ribbon 2, the elastic element 5 connecting one end 4, 9 of said ribbon 2 to a fixed support 17, and secured to one of the ends 4, 9 of the ribbon 2.
  • the elastic element 5 is integral with the external end 4 of the ribbon 2.
  • the internal end 9 of the ribbon 2 is assembled to a support 3 of an oscillating mass of the resonator.
  • the elastic element 5 is a different element from the ribbon 2.
  • the fixed support 17 is fixed relative to the plate 21.
  • the elastic element 5 adds additional flexibility to that of the ribbon 2.
  • the elastic element 5 preferably has a lower flexibility than that of the ribbon 2.
  • the elastic element 5 is here arranged in the extension of the ribbon 2.
  • the elastic element 5 of the spiral spring 25 comprises a flexible blade guide comprising at least one flexible blade.
  • the guidance here comprises two uncrossed flexible blades 11, 12 and a rigid part 18.
  • the flexible blades 11, 12 are joined, on the one hand laterally to a fixed support 17, and on the other hand to the rigid part 18 by approaching one from the other.
  • the flexible blades 11, 12 move away from the rigid part 18 to the fixed support 17.
  • the external end 4 of the ribbon 2 is joined to the rigid part 18.
  • the fixed support 17 is immobile relative to to movement 10.
  • the fixed support 17 has an L shape, a first branch 46 of the L serving as a connection with the flexible blades 11, 12, the second branch 47 of the L being oriented on the side opposite the guide with uncrossed blades to be able to be assembled with clockwork movement 10.
  • the means for adjusting the spiral spring 25 further comprise prestressing means 6 for applying a variable force or torque to the elastic element 5.
  • prestressing means 6 for applying a variable force or torque to the elastic element 5.
  • the prestressing means 6 comprise a secondary flexible blade 19, arranged on an opposite side of the rigid part 18 in the extension of the guide with uncrossed blades.
  • the secondary flexible blade 19 is arranged tangentially to the ribbon 2, at the external end 4.
  • the secondary flexible blade 19 is connected at the other end to a curved lever 14 partially bypassing the ribbon 2.
  • the lever 14 is connected, in addition to the secondary flexible blade 19, to a semi-rigid structure 27 linked to the fixed support 17.
  • the semi-rigid structure 27 is partially deformed when the lever 14 is actuated by force or torque.
  • the force or torque is exerted on the free end 32 of the lever 14.
  • the lever 14 of the preloading means 6 transmits the variable force or torque to the elastic element 5 via the secondary flexible blade 19 and the semi-rigid structure 27, so as to modify the flexibility of the spiral spring 25.
  • the elastic element 5 and the ribbon 2 are distinct, and are assembled to one another by assembly means.
  • the assembly means are, for example, glue.
  • the elastic element 5 is formed of a first material supporting assembly processes generating stresses induced in the first material, such as driving or screwing.
  • Driving is a process in which a first part is at least partly force-fitted into a housing of a second part, and is held by friction in the housing.
  • the housing squeezes the part of the first piece.
  • Screwdriving is a process in which two parts are held together using a screw, which partially passes through the first and second parts to hold them together.
  • the first material is preferably to be chosen from metals or metal alloys, such as nickel silver, Cube2, steel, nickel or nickel-based alloys, for example nickel phosphorus NiP or tungsten-nickel.
  • NiW, or materials for LIGA type processes such as alloys based on Ni, based on Co, based on CuNiSn, or a maraging type steel.
  • An example of a cobalt-based spring alloy is Phynox®
  • a maraging steel is Durnico®
  • a CuNiSn alloy is ToughMet® .
  • Such materials can withstand the stresses induced by assembly processes, such as driving or screwing.
  • the flexible ribbon 2 is formed of a second material different from the first material.
  • the ribbon 2 is in one piece, or even made of the same material.
  • the second material comprises mainly silicon or silicon oxide, preferably entirely.
  • the flexible ribbon 2 has the non-magnetic properties of silicon.
  • the second material is of the Nivarox CT ® type or of the Nivachron ® type, which are well known to those skilled in the art of watchmaking.
  • the prestressing means 6 are also formed from the first material.
  • the prestressing means 6 and the elastic element 5 are more resistant and can be assembled by processes such as driving or screwing.
  • the first eyebolt has a housing allowing the free end to be embedded therein.
  • the ribbon 2 and the elastic element 5 are assembled together at a junction 13 by gluing.
  • the external end 4 of the ribbon 2 is glued to the rigid part 18 of the flexible blade guide of the elastic element 5 at the junction 13.
  • the rigid part 18 comprises for example a housing in which the external end 4 of the ribbon 2, which is held in place by gluing.
  • the second material for example silicon or silicon oxide, being more fragile than the first material, the external end 4 cannot be embedded in the housing.
  • the bonding is sufficient, because it is not subject to the force or the torque produced by the prestressing means 6, which is exerted only on the elastic element 5.
  • the elastic element 5 and the ribbon 2 are manufactured with different processes depending on the two materials.
  • the elastic element 5 and/or the prestressing means 6 are produced, for example by a wire erosion process, by a laser machining process or a laser-water jet coupling, or even by a process of LIGA type lithography.
  • the ribbon 2 formed in the second material is for example produced by a deep reactive ion etching process of the DRIE type, in particular to obtain a silicon hairspring.
  • the process is preferably a deep reactive ion etching process of the DRIE type.
  • a first eyebolt 34 and a second eyebolt 35 are shown, which are for example arranged substantially symmetrically with respect to the balance shaft 24.
  • the first eyebolt 34 cooperates with the free end 15 of the lever 14, and the second eyebolt 35 cooperates with the second branch 47 of the fixed support 17.
  • the second eyebolt 35 comprises a housing in which the second branch 47 is inserted and held by force by friction or by embedding.
  • the second branch 47 is held in the second eyebolt 35 by means of a screw, not shown in the figures.
  • the two eyebolts 34, 35 are arranged on either side of the prestressing means 6 and the elastic element 5.
  • the two eyebolts 34, 35 are rigidly linked to the lever 14 and to the fixed support 17.
  • the first 34 and the second peg 35 are respectively integral with the lever 14 and the fixed support 17.
  • the assembly of the pegs and the spiral spring 25 is for example carried out by bonding, brazing, welding, by deformation of metallic glass, or by mechanical fixing.
  • the movement of the first eyebolt 34 relative to the second eyebolt 35 modifies the flexibility of the elastic element 5, because the movement exerts a more or less significant force or torque on the lever 14 of the prestressing means 6, so that the flexibility of the elastic element 5 varies, and thus the flexibility of the entire spiral spring 25.
  • An adjustment device makes it possible to move the first stud 34 relative to the second stud 35 to modify the torque or the force applied to the flexible element 5.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Springs (AREA)
  • Micromachines (AREA)
EP22213757.2A 2022-12-15 2022-12-15 Spiralfeder für resonatormechanismus einer uhr mit mitteln zur einstellung der flexibilität und zugehörige materialien Pending EP4386486A1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP22213757.2A EP4386486A1 (de) 2022-12-15 2022-12-15 Spiralfeder für resonatormechanismus einer uhr mit mitteln zur einstellung der flexibilität und zugehörige materialien
JP2023202907A JP7669456B2 (ja) 2022-12-15 2023-11-30 ヒゲゼンマイ、回転共振器、及び時計のムーブメント
US18/536,500 US20240201629A1 (en) 2022-12-15 2023-12-12 Balance-spring for a horological resonator mechanism provided with means for adjusting flexibility and associated materials
CN202311741492.5A CN118210214A (zh) 2022-12-15 2023-12-15 设有用于调节柔性的装置的用于钟表谐振器机构的摆轮游丝和相关联材料

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22213757.2A EP4386486A1 (de) 2022-12-15 2022-12-15 Spiralfeder für resonatormechanismus einer uhr mit mitteln zur einstellung der flexibilität und zugehörige materialien

Publications (1)

Publication Number Publication Date
EP4386486A1 true EP4386486A1 (de) 2024-06-19

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP22213757.2A Pending EP4386486A1 (de) 2022-12-15 2022-12-15 Spiralfeder für resonatormechanismus einer uhr mit mitteln zur einstellung der flexibilität und zugehörige materialien

Country Status (4)

Country Link
US (1) US20240201629A1 (de)
EP (1) EP4386486A1 (de)
JP (1) JP7669456B2 (de)
CN (1) CN118210214A (de)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2781969A1 (de) * 2013-03-19 2014-09-24 Nivarox-FAR S.A. Unzerlegbare Monoblock-Komponente einer Uhr
EP4009115A1 (de) * 2020-12-02 2022-06-08 Omega SA Spiralfeder für resonatormechanismus eines uhrwerks, der mit mitteln zum ausgleichen der starrheit ausgestattet ist

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH1675373A4 (de) * 1973-11-29 1976-11-15
EP3557333B1 (de) * 2018-04-16 2020-11-04 Patek Philippe SA Genève Herstellungsverfahren einer zugfeder für eine uhr
US11454932B2 (en) * 2018-07-24 2022-09-27 The Swatch Group Research And Development Ltd Method for making a flexure bearing mechanism for a mechanical timepiece oscillator
EP4286960B1 (de) * 2022-06-02 2026-03-25 ETA SA Manufacture Horlogère Suisse Regulierorgan für uhr, das mit einer rückervorrichtung ausgestattet ist

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2781969A1 (de) * 2013-03-19 2014-09-24 Nivarox-FAR S.A. Unzerlegbare Monoblock-Komponente einer Uhr
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
CN118210214A (zh) 2024-06-18
JP2024086614A (ja) 2024-06-27
JP7669456B2 (ja) 2025-04-28
US20240201629A1 (en) 2024-06-20

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