EP3485332B1 - Hemmungsmechanismus - Google Patents

Hemmungsmechanismus Download PDF

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Publication number
EP3485332B1
EP3485332B1 EP17739529.0A EP17739529A EP3485332B1 EP 3485332 B1 EP3485332 B1 EP 3485332B1 EP 17739529 A EP17739529 A EP 17739529A EP 3485332 B1 EP3485332 B1 EP 3485332B1
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EP
European Patent Office
Prior art keywords
escapement
winding
mechanism according
spring blade
escapement mechanism
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.)
Active
Application number
EP17739529.0A
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English (en)
French (fr)
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EP3485332A1 (de
Inventor
Stéphane OES
Matthieu Kummer
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.)
Sowind SA
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Sowind SA
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Publication of EP3485332A1 publication Critical patent/EP3485332A1/de
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    • 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
    • G04B15/10—Escapements with constant impulses for the regulating mechanism
    • 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
    • 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

Definitions

  • the present invention relates to the field of mechanical watchmaking. It relates, more particularly, to an escapement mechanism arranged to transmit pulses of mechanical energy from a driving source to an oscillating regulator of a timepiece by means of a leaf spring working in buckling around a inflection point.
  • the leaf spring is capable of accumulating the energy from the driving source between two pulses and of transmitting it to said oscillating regulator at each pulse via a first and a second rocker.
  • Such a mechanism is described in particular in the document WO 99/64936 .
  • the latter discloses, more generally, a method for transmitting pulses of mechanical energy from a driving source to an oscillating regulator, by means of a leaf spring working in buckling. More particularly, this method is implemented in particular by an escapement mechanism illustrated in the figure 1 , intended to maintain the oscillations of a regulator, composed for example of a balance wheel 1 associated with a hairspring, by delivering to it energy received from a driving source, such as a barrel for example, not visible on the figure 1 , via a leaf spring 2, the ends of which are positioned such that it occupies a stable position corresponding to a second mode buckling.
  • a driving source such as a barrel for example
  • the leaf spring 2 is capable, via a winding rocker 3 and a trigger rocker 4, of accumulating the energy from the driving source during a winding phase, of remain in an armed state during a rest phase and restore the energy accumulated to said oscillating regulator during a pulse phase.
  • the trigger rocker 4 is kinematically linked to the leaf spring 2 substantially at its central point of inflection.
  • the detent rocker 4 comprises, at one end, a fork intended to cooperate with a plate 6 and a plate pin 7 that comprises the balance 1.
  • the winding rocker 3 comprises a central portion and two symmetrical wings whose ends are kinematically linked to the leaf spring 2.
  • the central portion comprises a first 8 and a second 9 rest pallets, intended to cooperate respectively with a first 10 and a a second 11 escape wheel.
  • the two flip-flops 3 and 4 are mounted free to rotate with reference to each other.
  • the wheels 10 and 11 each comprise a pinion meshing with the last wheel 12 of the going train so that the wheels 10 and 11 pivot in a synchronized manner.
  • the wheels 10 and 11 comprise a particular toothing, the shape of which is adapted to cooperate with the first 8 and second 9 rest pallets of the winding rocker 3, on the one hand to transmit energy to this rocker of winding 3 and, on the other hand, to block the rotation of the escape wheels 10 and 11, according to the phases of operation which will be summarized below. For more details, it is possible to refer to the document cited in the introduction.
  • the figure 1 shows a prior art escapement mechanism immediately after an impulse phase and at the start of a winding phase, the balance wheel 1 rotates counterclockwise, the plate peg 7 comes out of the fork, the first rest pallet 8 has just emerged from wheel 10 and spring 2 is in a stable position corresponding to second mode buckling.
  • the first escapement wheel 10 rotates freely and the second escapement wheel 11 cooperates with the second rest pallet 9 of the winding rocker 3 to pivot the latter in the counterclockwise direction until a tooth of the second wheel 11 comes to rest on the second rest pallet 9.
  • the leaf spring 2 has left its initial stable state corresponding to a second mode buckling and has deformed under the action of the winding rocker 3 to a metastable state close to an unstable state corresponding to fourth mode buckling. The winding of the leaf spring 2 is then maximum.
  • the escapement wheels 10, 11 are stationary, one tooth of the second wheel 11 resting against the second rest pallet 9.
  • the balance 1 continues its oscillation until that the pin 7 strikes the fork of the trigger rocker 4 which marks the start of the pulse phase.
  • the trigger rocker 4 pivots by acting on the leaf spring 2 which then suddenly rocks from its unstable position to a stable state corresponding to a second mode buckling inverse to the previous one.
  • This change of state causes the winding rocker 3 to pivot, causing the release of the second rest pallet 9 from the second escapement wheel 11.
  • the winding rocker 3 pivots until the first rest pallet 8 meets the first escapement wheel 10.
  • the state of the leaf spring 2 changes, the latter also acts on the trigger rocker 4, thus communicating to the balance wheel 1 the energy accumulated during the winding of the spring - blade 2, through the fork.
  • Such an escapement mechanism makes it possible in particular to maintain the oscillations of the balance constantly over the entire duration of the power reserve independently of the variations in torque of the energy source.
  • this mechanism has a very large size related to the arrangement of the leaf spring, the winding rocker and the escapement wheels relative to the regulator member. It also requires the delicate adjustment of two symmetrical and simultaneous motor members, which proves to be extremely delicate. Finally, a large part of the driving energy available from said driving members is unfortunately wasted due to the numerous friction generated by the specific construction of the mechanism, which negatively affects the running of the movement in which the mechanism is integrated.
  • the object of the present invention is to at least partially remedy these drawbacks.
  • the present invention proposes an escapement mechanism according to appended claim 1.
  • the escapement mechanism of the invention thus has the advantage of providing a blade-spring of reduced length compared to known mechanisms of the prior art, the buckling of which is ensured by direct interaction of the winding rocker with the blade. emerges directly at its point of inflection.
  • At least one escapement wheel set comprises an escapement wheel driven on an escapement pinion, said escapement wheel comprising peripheral teeth.
  • the mechanism of the invention comprises a first escapement wheel set and a second identical escapement wheel set, both arranged to be kinematically connected to at least one driving member of a watch movement by a gear train.
  • the leaf spring is secured at a second end to a fixed support arm extending along a longitudinal axis XX' perpendicular to the axis of rotation of the winding and trigger rockers. .
  • the escape wheels are advantageously arranged symmetrically with respect to the axis X-X' and the winding rocker extends in a longitudinal direction A-A' coplanar with the escape wheels of the escape wheels.
  • the winding rocker comprises an actuating arm extending along the axis AA' and from which two pallets are integral with and projecting from said arm symmetrically to said axis AA' so as to alternately engage with the teeth of the escape wheels.
  • the winding rocker comprises at one free end a finger adapted to cooperate with an eyelet of the leaf spring at its point of inflection.
  • the leaf spring is mounted free in rotation at a second end on a lug integral with the support arm.
  • the leaf spring is formed in one piece with the trigger rocker or any other manner known to those skilled in the art.
  • the leaf spring, the winding and trigger rockers are made of silicon.
  • the winding lever and its pallets can also be formed from a monolithic piece of silicon, as can the escape wheel or wheels.
  • levers, pallets and escape wheel could also be formed of any other material usually known for this purpose in the field of watchmaking.
  • the palettes could in particular be made of rubies or diamonds.
  • escapement mechanism 100 arranged to transmit pulses of mechanical energy from a driving source, for example consisting of one or more barrels, not shown in the figures, to an oscillating timepiece regulator, of the balance type -hairspring 200, via a leaf spring 300 working in buckling around a point of inflection I.
  • the leaf spring 300 is mounted integral at a first end 301 with a trigger rocker 500 pivotally mounted around a rotation shaft 600, defining a vertical axis A of rotation of the trigger rocker 500.
  • a second end 302 the leaf spring 300 is secured to a mounting stud (not shown) secured to a bridge or to the plate of a timepiece or else, as shown in the figure 2 formed of material at a first end of a support arm 400 fixed relative to said plate.
  • the leaf spring 300 is made of silicon and the detent rocker 500 is also made of silicon, preferably formed of material with the leaf spring 300 by deep etching methods well known to those skilled in the art. in the field of microtechnology, in particular devices of the MEMS type (for micro-electromechanical systems in English).
  • the leaf spring 300 is preferably arranged between the stud and the shaft 600 so that it can accumulate energy from the driving source between two pulses on the one hand and restore it elastically to the oscillating regulator 200 under the 1st order buckling effect at each pulse via the detent rocker and a winding rocker 700 also pivotally mounted around the shaft 600 defining the axis A.
  • the winding rocker 700 extends along a longitudinal axis A-A', perpendicular to the vertical axis of rotation A of said winding rocker and of the Trigger 500.
  • Winding rocker 700 is mounted free to rotate around shaft 600 and comprises an actuating arm extending from said shaft 600 to a free rear end at which is formed or arranged a finger 701 connecting the winding rocker 700 to the leaf spring 300 at its point of inflection I, said finger 701 being arranged to extend through an eyelet 303 centered on said point of inflection I and formed of material in the leaf spring 300.
  • winding rocker 700 is also formed of silicon and finger 701 may be made of ruby or diamond, for example inserted into an orifice provided for this purpose at the free end or else formed of silicon material with the arm of the winding seesaw.
  • the escapement mechanism 100 further comprises two escapement wheels 800a, 800b each comprising an escapement wheel 801a, 801b driven on an escapement pinion 802a, 802b, each of the escapement wheels 801a, 801b comprising teeth devices 803.
  • the two escapement mobiles 800a, 800b are arranged symmetrically on either side of the longitudinal axis XX' of the support arm 400, the winding rocker 700 extending in the plane of the escape wheels 801a, 801b therebetween.
  • the escapement pinions 802a, 802b are arranged to be in kinematic connection via a toothed wheel 900 with the going train of the timepiece comprising the escapement mechanism 100 to receive the driving energy from the energy source .
  • the winding rocker 700 comprises two pallets 702, for example in ruby or diamond, arranged symmetrically to one another with respect to the longitudinal axis AA' of the winding rocker 700 and projecting on the fields sides of the winding rocker so as to cooperate respectively during the alternations of the regulating member 200 with the teeth 803 of the escapement wheels 801a, 801b.
  • said pallets 702 can be made in one piece with the winding rocker 700 in a monolithic piece of silicon and the escape wheels also made of silicon, for example by deep etching processes.
  • the trigger rocker 500 is arranged to cooperate with the regulator member 200 independently of the winding rocker 700.
  • the trigger rocker 500 comprises at a free end opposite the rotation shaft 600 a fork 501 adjusted to cooperate, in a conventional manner, with the pin 202 of the plate carried on the large plate 201a of a double plate 201 driven on the axis of the spiral balance forming the regulating member 200.
  • a pin 502 integral with the trigger rocker 500 and resting on the upper field of the latter extends between the horns of the fork 501 in order, here again in a conventional manner, to cooperate with the notch formed in the periphery of the small plate 201b of the double plate 201.
  • This assembly can advantageously be made monolithically.
  • the winding rocker 700 cooperates via its pallets 702 with the teeth 803 of the escape wheels 801a, 801b to alternately lock then release said escape wheels 800a, 800b in order to transmit via the leaf spring 300 and the rocker relaxation 500 motive energy to the organ regulator 200.
  • This driving energy is transmitted in the form of a pulling torque applied by the teeth 803 on the pallets 702 of the winding rocker 700.
  • the plate pin 202 enters the fork 501 of the trigger rocker 500 and presses on the horns of said fork 501 causing a rotation of the trigger rocker around its axis A.
  • This rotation of the rocker relaxation 500 induces a passage of the leaf spring 300 from a first unstable state to a second stable state called 1st order buckling inducing a displacement of the inflection point I inducing the support of the leaf spring 300 on the finger 701 of the winding rocker 700, which in turn pivots around the axis A from a first pulling position on one of the escape wheels 801a, 801b to a second pulling position on the other of the escape wheels 801a , 801b.
  • the escape wheels 800a, 800b take one step in rotation under the action of the driving force.
  • the release of the trigger rocker 500 is triggered by an action of the regulator on the fork 501 without intervention of the leaf spring 2 in the transfer of the release energy. It is also possible to couple the trigger and locking rockers on the same axis of rotation, which thus allows a dissociation of the trigger and locking functions of the escapement mobiles 800a, 800b on the one hand, and of the winding functions of the leaf spring 300. In addition, an effective draw is obtained which improves the safety of the functions on the escapement.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Micromachines (AREA)
  • Springs (AREA)

Claims (12)

  1. Hemmungsmechanismus (100), der dazu eingerichtet ist, Impulse mechanischer Energie mithilfe einer Blattfeder (300), die durch Knickung um einen Wendepunkt (I) arbeitet, von einer Antriebsquelle an einen schwingenden Regler (200) einer Uhr zu übertragen, wobei die Blattfeder (300) die von der Antriebsquelle stammende Energie zwischen zwei Impulsen speichern und bei jedem Impuls mithilfe einer Spannwippe (700) und einer Sperrwippe (500), die um eine Drehachse (A), die den zwei Wippen, der Spannwippe (700) und der Sperrwippe (500), gemeinsam ist, drehbeweglich und dazu eingerichtet sind, mit der Blattfeder (300) und mindestens einem Hemmungsdrehteil (800a), das die Energie von der Antriebsquelle empfängt, zusammenzuarbeiten, um dessen Drehung intermittierend anzuhalten, an den schwingenden Regler übertragen kann,
    dadurch gekennzeichnet, dass ein Ende (301) der Blattfeder (300) einstückig mit der Sperrwippe ist, die um die Drehachse (A) der Sperrwippe drehbeweglich ist, und dadurch, dass die Spannwippe (700) an einem Ende mit der Blattfeder (300) an deren Wendepunkt zusammenarbeitet.
  2. Hemmungsmechanismus nach Anspruch 1, dadurch gekennzeichnet, dass das mindestens eine Hemmungsdrehteil (800a) ein Hemmungsrad (801a) umfasst, das auf einem Hemmungsritzel (802a) angetrieben wird, wobei das Hemmungsrad eine Umfangsverzahnung (803) umfasst.
  3. Hemmungsmechanismus nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass er ein erstes Hemmungsdrehteil (800a) und ein zweites Hemmungsdrehteil (800b) umfasst, die identisch sind.
  4. Hemmungsmechanismus nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Blattfeder (300) an einem zweiten Ende einstückig mit einem festen Tragarm (400) ist, der sich entlang einer Längsachse (X-X') erstreckt, die perpendikular zur Drehachse (A) der Spann- und Sperrhebel ist.
  5. Hemmungsmechanismus nach Anspruch 3 und 4, dadurch gekennzeichnet, dass die Hemmungsräder (800a, 800b) symmetrisch zur Achse (X-X') angeordnet sind und sich die Spannwippe (700) entlang einer Längsrichtung (A-A') erstreckt, die komplanar mit den Hemmungsrädern (801a, 801b) der Hemmungsdrehteile ist.
  6. Hemmungsmechanismus nach Anspruch 5, dadurch gekennzeichnet, dass die Spannwippe (700) zwei Paletten (702) umfasst, die derart von der Spannwippe symmetrisch zur Achse (A-A') vorstehen, dass sie im Betrieb abwechselnd in die Verzahnung (803) der Hemmungsräder (801a, 801b) eingreifen.
  7. Hemmungsmechanismus nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Spannwippe (700) an einem freien Ende einen Finger (701) umfasst, der dazu geeignet ist, mit einer Öse der Blattfeder (300) an deren Wendepunkt zusammenzuarbeiten.
  8. Hemmungsmechanismus nach einem der Ansprüche 4 bis 7, dadurch gekennzeichnet, dass die Blattfeder (300) an einem zweiten Ende frei drehbar auf einen mit dem Tragarm (400) einstückigen Dorn montiert ist.
  9. Hemmungsmechanismus nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass die Blattfeder (300) einstückig mit der Sperrwippe (500) ausgebildet ist.
  10. Hemmungsmechanismus nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass die Blattfeder (300), die Spannwippe (700) und die Sperrwippe (500) aus Silicium bestehen.
  11. Hemmungsmechanismus nach Anspruch 6 und 10, dadurch gekennzeichnet, dass die Spannwippe (700) und die Paletten (703) aus einem monolithischen Stück Silicium ausgebildet sind.
  12. Hemmungsmechanismus nach einem der Ansprüche 2 bis 11, dadurch gekennzeichnet, dass die Hemmungsräder (801a, 801b) aus Silicium bestehen.
EP17739529.0A 2016-07-18 2017-07-04 Hemmungsmechanismus Active EP3485332B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH00918/16A CH712715B1 (fr) 2016-07-18 2016-07-18 Mécanisme d'échappement mettant en oeuvre un ressort-lame travaillant en flambage.
PCT/EP2017/066687 WO2018015145A1 (fr) 2016-07-18 2017-07-04 Mecanisme d'echappement

Publications (2)

Publication Number Publication Date
EP3485332A1 EP3485332A1 (de) 2019-05-22
EP3485332B1 true EP3485332B1 (de) 2022-01-12

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ID=59337648

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17739529.0A Active EP3485332B1 (de) 2016-07-18 2017-07-04 Hemmungsmechanismus

Country Status (5)

Country Link
EP (1) EP3485332B1 (de)
JP (1) JP2019521346A (de)
CN (1) CN109478036B (de)
CH (1) CH712715B1 (de)
WO (1) WO2018015145A1 (de)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1084459A1 (de) 1998-06-08 2001-03-21 Manufacture des Montres Rolex S.A. Verfahren zur übertragung von mechanischen energieimpulsen von einer antriebsquelle zu einem schwingungsregler
CH700815B1 (fr) * 2007-04-18 2010-10-29 Eta Sa Mft Horlogere Suisse Echappement comportant deux roues d'échappement.
CH705276B1 (fr) * 2007-12-28 2013-01-31 Chopard Technologies Sa Organe d'entraînement et de transmission pour un échappement à ancre, plateau et échappement en étant équipés, et pièce d'horlogerie les comportant.
EP2105806B1 (de) * 2008-03-27 2013-11-13 Sowind S.A. Hemmungsmechanismus
JP5729666B2 (ja) * 2010-09-14 2015-06-03 セイコーインスツル株式会社 時計用デテント脱進機、および機械式時計
JP5485859B2 (ja) * 2010-11-17 2014-05-07 セイコーインスツル株式会社 アンクル脱進機及びこれを備えた機械式時計
EP2706416B1 (de) * 2012-09-07 2015-11-18 The Swatch Group Research and Development Ltd Flexibler Anker mit konstanter Kraft
WO2016001740A2 (en) * 2014-07-03 2016-01-07 Preciflex Sa Clockwork mechanisms for double accumulation and power transmission dedicated mono-conrolled movement
WO2016113704A2 (de) * 2015-01-16 2016-07-21 Creaditive Ag Uhr, regelorgan und verfahren zum betreiben eines regelorgans mit hoher regelgüte

Also Published As

Publication number Publication date
CH712715A2 (fr) 2018-01-31
EP3485332A1 (de) 2019-05-22
CN109478036B (zh) 2021-01-01
WO2018015145A1 (fr) 2018-01-25
CN109478036A (zh) 2019-03-15
JP2019521346A (ja) 2019-07-25
CH712715B1 (fr) 2020-06-30

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