EP4383012A1 - Profil auto-demarrant pour echappement d'horlogerie - Google Patents

Profil auto-demarrant pour echappement d'horlogerie Download PDF

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Publication number
EP4383012A1
EP4383012A1 EP22212186.5A EP22212186A EP4383012A1 EP 4383012 A1 EP4383012 A1 EP 4383012A1 EP 22212186 A EP22212186 A EP 22212186A EP 4383012 A1 EP4383012 A1 EP 4383012A1
Authority
EP
European Patent Office
Prior art keywords
anchor
angle
zone
torque
positive
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
EP22212186.5A
Other languages
German (de)
English (en)
French (fr)
Inventor
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.)
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 EP22212186.5A priority Critical patent/EP4383012A1/fr
Priority to US18/513,855 priority patent/US20240192640A1/en
Priority to JP2023203805A priority patent/JP2024083267A/ja
Priority to CN202311663671.1A priority patent/CN118169992A/zh
Priority to CN202323317233.8U priority patent/CN221239192U/zh
Priority to KR1020230175106A priority patent/KR20240085873A/ko
Publication of EP4383012A1 publication Critical patent/EP4383012A1/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
    • G04B15/00—Escapements
    • G04B15/14—Component parts or constructional details, e.g. construction of the lever or the escape wheel
    • 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
    • G04B15/00—Escapements
    • G04B15/06—Free escapements
    • 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
    • G04B15/00—Escapements
    • G04B15/06—Free escapements
    • G04B15/08—Lever escapements
    • 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
    • G04B17/32—Component parts or constructional details, e.g. collet, stud, virole or piton

Definitions

  • the invention relates to a watch escape mechanism, comprising at least one anchor and at least one escape wheel, said at least one anchor being arranged to cooperate, on the one hand with an inertial mass of a mechanical oscillator , and subjected, directly or indirectly, to the action of elastic return means that said mechanical oscillator includes, and on the other hand, to the level of pallets that said anchor carries or includes, with teeth that said at least one wheel includes exhaust.
  • the invention relates to the field of watchmaking escapement mechanisms.
  • the criterion which makes it possible to distinguish these two classes is to know if, when the balance wheel is in its rest position (zero torque of the elastic return means: hairspring or flexible guide blades), the escape wheel can be on a plane rest or not. If the escape wheel is on the rest plane when the balance wheel is in its rest position, then the escapement cannot start on its own.
  • the invention described here concerns the optimization of the self-starting of an exhaust which is already potentially self-starting.
  • the barrel torque must be sufficient to arm the balance spring, or more generally to overcome the oscillator's restoring torque (e.g. rigidity of the flexible guide). This means that when the barrel is almost completely uncocked, a potentially self-starting escapement does not start on its own. When the barrel is fully cocked, the situation depends on the caliber in question: some calibers start on their own, while others need to be “shaken” a little for them to start.
  • the invention aims to improve the self-starting of “potentially self-starting” calibers, but whose fully armed barrel torque is not sufficient for the escapement to start on its own.
  • the invention consists of optimizing the shape of the pallet of the anchor and/or of the tooth of the escape wheel, to promote self-starting. To do this, we create a particular vane and/or tooth geometry, so that the oscillator return torque transferred to the escape wheel is almost constant over the entire lift angle.
  • the invention relates to a timepiece escapement mechanism according to claim 1.
  • the invention also includes a clock movement comprising such an escapement mechanism.
  • the invention also includes a timepiece, in particular a watch, comprising at least one such clockwork movement.
  • the invention relates to a watch escape mechanism 100, comprising at least one anchor 10 and at least one escape wheel 20.
  • This at least one anchor 10 is arranged to cooperate, on the one hand with an inertial mass 40 of a mechanical oscillator 400 and is subjected, directly or indirectly, to the action of elastic return means 50 which this mechanical oscillator 400 comprises.
  • this at least one anchor 10 is arranged to cooperate on the other hand, at the level of pallets 1 which this anchor 10 carries or comprises, with teeth 2 which this at least one escape wheel 20 comprises.
  • At least one said pallet 1 and/or at least one said tooth 2 comprises an impulse zone comprising two zones, one for an angular portion where said elastic return means tend to drive said escape wheel 20, and the other for another angular portion where said elastic return means 50 tend to oppose said escape wheel 20, said two zones being arranged so as to minimize the maximum moment of the elastic return means seen by said escape wheel 20.
  • each said pallet 1 and/and each said tooth 2 comprises an impulse zone comprising two zones, one for an angular portion where said elastic return means tend to drive said escape wheel 20, and the another for another angular portion where said elastic return means 50 tend to oppose said escape wheel 20, said two zones being arranged so as to minimize the maximum moment of the elastic return means seen by said escape wheel 20.
  • FIG. 1 shows the case of an escapement of the prior art, for example a "standard" Swiss anchor escapement, in particular and not limited to as described by the Illustrated Professional Dictionary of Watchmaking, by Mr. GA Berner, ⁇ Fédération de the Swiss watch industry FH, article 1660 F, where the curve showing on the ordinate the restoring torque CR of the oscillator transferred to the escape wheel, as a function of the angle on the escape wheel on the abscissa, has the shape of a straight line between moment values which are symmetrical: + Mmax, and - Mmax.
  • the oscillator's restoring torque e.g. hairspring torque
  • the restoring torque of the oscillator brings the anchor back towards its intermediate position, therefore the wheel must exert an increasingly greater torque to move the anchor (positive and increasing torque).
  • intermediate position the position of the anchor when the inertial mass of the oscillator is in its equilibrium position: in this position, the elastic return means such as a spiral spring, or even flexible guidance, n do not exert force or torque on the anchor.
  • FIG. 4 shows, on the left a standard anchor pallet 1, with a rest plane ZR and an impulse plane Z0, and on the right a tooth 2 of the escape wheel 20 resting on the edge of this standard pallet, which separates the rest plane ZR and the impulse plane Z0.
  • FIG. 6 illustrates a palette 1 according to the invention.
  • the first zone Z1 according to the invention is the traditional rest plane ZR of a standard anchor pallet.
  • the second zone Z2 is connected to the first zone Z1 at a first edge A.
  • the second zone Z2 and the first zone Z1 are planar, and form a dihedral.
  • the third zone Z3 is connected to the second zone Z2 at the level of a second edge B.
  • the second zone Z2 and the third zone Z3 are planar, and form a dihedral.
  • the third zone Z3 is formed of two plane surfaces which form a dihedral.
  • THE figures 5 and 7 show, on the one hand an ideal case without friction represented in broken lines, and on the other hand a case with a friction coefficient of 0.15 represented in solid lines.
  • FIG. 6 shows, on the left a pallet according to the invention, and on the right a tooth of the escape wheel resting on the second edge B of this pallet, which separates the second zone Z2 from the third zone Z3.
  • the standard pallet profile of the Figure 4 is drawn in superposition, in broken lines, with its impulse surface Z0, its rest plane ZR being here constituted by the first zone Z1.
  • the pallet of the anchor according to the invention is, all things being equal, lengthened compared to the standard pallet, and that the impulse plane Z0 of the standard pallet is replaced by a composite surface resulting from the juxtaposition of the second zone Z2 and the third zone Z3.
  • the third zone Z3 comprises at least one flat surface, or, even more particularly, is flat.
  • the angle going from normal to radial does not always have the same direction.
  • the second angle w2 between the second normal N2 and the second radial OQ is less than atan ( ⁇ ), where ⁇ is the coefficient of friction between at least one pallet 1 and at least one tooth 2, the notation “atan » meaning the arctangent.
  • the friction coefficient ⁇ is preferably between 0.10 and 0.30. More particularly, the friction coefficient ⁇ is between 0.12 and 0.24. Even more particularly, the coefficient of friction ⁇ is equal to 0.2; the angle w1 between the normal N1 and the radial OQ is then less than atan (0.2).
  • the third angle w3 between the third normal N3 and the third radial OR is greater than atan ( ⁇ ).
  • the friction coefficient ⁇ is preferably between 0.10 and 0.30. More particularly, the friction coefficient ⁇ is between 0.16 and 0.24. Even more particularly, the friction coefficient ⁇ is equal to 0.2; the angle w1 between the normal N1 and the radial OQ is then greater than atan (0.2).
  • the vanes can be fixed on the oscillator (rubbing rest).
  • the special profile described here can be on the tooth of the escapement wheel.
  • the contact between an anchor pallet 1 and a tooth 2 of the escape wheel 20 comprises at least three zones, a first zone, called rest zone, where the torque is in a negative direction, where the angle between the normal to the contact and the radial of the anchor is negative, a second zone corresponding to the first half-angle of lift where the torque is of positive direction, where the angle is positive and of value less than a predefined value, and a third zone corresponding to the second half-angle of lifting where the torque is of positive direction, where the angle is positive and of limited value greater than this predefined value.
  • this predefined value is atan (0.2) in the case of a friction coefficient ⁇ equal to 0.20, it would be atan (0.15) in the case of simulations of figures 5 and 7 with a coefficient of friction ⁇ equal to 0.15.
  • the invention also comprises a watch movement 500, in particular and not limited to as described by the Illustrated Professional Dictionary of Watchmaking, by Mr. GA Berner, ⁇ Federation of the Swiss Watch Industry FH, article 3091 A, comprising at least means of storing and distributing energy 200 and a cog 300 arranged to transmit energy to at least one such escape mechanism 100, and at least one mechanical oscillator 400 with at least one inertial mass 40 recalled by elastic return means 50, said inertial mass 40 being arranged to cooperate with said at least one anchor 10.
  • a watch movement 500 in particular and not limited to as described by the Illustrated Professional Dictionary of Watchmaking, by Mr. GA Berner, ⁇ Federation of the Swiss Watch Industry FH, article 3091 A, comprising at least means of storing and distributing energy 200 and a cog 300 arranged to transmit energy to at least one such escape mechanism 100, and at least one mechanical oscillator 400 with at least one inertial mass 40 recalled by elastic return means 50, said inertial mass 40 being arranged to cooperate with said at least one anchor
  • said mechanical oscillator 400 is a sprung balance oscillator.
  • the invention applies to the case where the pallet 1 is in a material other than the anchor 10 itself, which can allow to adjust the optimal friction coefficient ⁇ . More particularly at least one pallet 1 is attached to a body which the anchor 10 comprises, and is made of a material other than that of this anchor body.
  • said mechanical oscillator 400 is a flexible guided oscillator with at least one inertial mass 40 suspended by thin elastic blades constituting the elastic return means 50 of the oscillator 400.
  • the invention also includes a timepiece 1000, in particular a watch, comprising at least one such timepiece movement 500.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
  • Micromachines (AREA)
  • Gears, Cams (AREA)
EP22212186.5A 2022-12-08 2022-12-08 Profil auto-demarrant pour echappement d'horlogerie Pending EP4383012A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP22212186.5A EP4383012A1 (fr) 2022-12-08 2022-12-08 Profil auto-demarrant pour echappement d'horlogerie
US18/513,855 US20240192640A1 (en) 2022-12-08 2023-11-20 Self-starting profile for timepiece escapement
JP2023203805A JP2024083267A (ja) 2022-12-08 2023-12-01 時計脱進機用の自己始動輪郭
CN202311663671.1A CN118169992A (zh) 2022-12-08 2023-12-06 钟表擒纵机构、钟表机芯和钟表
CN202323317233.8U CN221239192U (zh) 2022-12-08 2023-12-06 钟表擒纵机构、钟表机芯和钟表
KR1020230175106A KR20240085873A (ko) 2022-12-08 2023-12-06 타임피스 이스케이프먼트를 위한 자체-시작 프로파일

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22212186.5A EP4383012A1 (fr) 2022-12-08 2022-12-08 Profil auto-demarrant pour echappement d'horlogerie

Publications (1)

Publication Number Publication Date
EP4383012A1 true EP4383012A1 (fr) 2024-06-12

Family

ID=84462791

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22212186.5A Pending EP4383012A1 (fr) 2022-12-08 2022-12-08 Profil auto-demarrant pour echappement d'horlogerie

Country Status (5)

Country Link
US (1) US20240192640A1 (zh)
EP (1) EP4383012A1 (zh)
JP (1) JP2024083267A (zh)
KR (1) KR20240085873A (zh)
CN (2) CN118169992A (zh)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH1661869A4 (fr) * 1968-11-07 1971-11-30 Hamilton Watch Co Echappement pour mécanisme garde-temps, notamment pour mécanisme de mouvement l'horlogerie et de montre
CH1082672A4 (zh) * 1972-07-19 1975-03-14
EP0018796B1 (en) * 1979-04-30 1984-11-07 George Daniels Watches, clocks and chronometers and escapements therefor
CH716525A1 (fr) * 2019-08-26 2021-02-26 Csem Ct Suisse Delectronique Microtechnique Sa Rech Developpement Régulateur mécanique horloger auto-démarrant.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH1661869A4 (fr) * 1968-11-07 1971-11-30 Hamilton Watch Co Echappement pour mécanisme garde-temps, notamment pour mécanisme de mouvement l'horlogerie et de montre
CH1082672A4 (zh) * 1972-07-19 1975-03-14
EP0018796B1 (en) * 1979-04-30 1984-11-07 George Daniels Watches, clocks and chronometers and escapements therefor
CH716525A1 (fr) * 2019-08-26 2021-02-26 Csem Ct Suisse Delectronique Microtechnique Sa Rech Developpement Régulateur mécanique horloger auto-démarrant.

Also Published As

Publication number Publication date
CN118169992A (zh) 2024-06-11
KR20240085873A (ko) 2024-06-17
CN221239192U (zh) 2024-06-28
US20240192640A1 (en) 2024-06-13
JP2024083267A (ja) 2024-06-20

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