EP2199875B1 - Chronometerhemmung - Google Patents

Chronometerhemmung Download PDF

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Publication number
EP2199875B1
EP2199875B1 EP09405206.5A EP09405206A EP2199875B1 EP 2199875 B1 EP2199875 B1 EP 2199875B1 EP 09405206 A EP09405206 A EP 09405206A EP 2199875 B1 EP2199875 B1 EP 2199875B1
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EP
European Patent Office
Prior art keywords
balance wheel
inertial member
disengagement
finger
balance
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
EP09405206.5A
Other languages
English (en)
French (fr)
Other versions
EP2199875A3 (de
EP2199875A2 (de
Inventor
Fabiano Colpo
Benoît Boulenguiez
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.)
Rolex SA
Original Assignee
Rolex 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
Priority claimed from EP09405029A external-priority patent/EP2221677A1/de
Application filed by Rolex SA filed Critical Rolex SA
Priority to EP09405206.5A priority Critical patent/EP2199875B1/de
Publication of EP2199875A2 publication Critical patent/EP2199875A2/de
Publication of EP2199875A3 publication Critical patent/EP2199875A3/de
Application granted granted Critical
Publication of EP2199875B1 publication Critical patent/EP2199875B1/de
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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
    • G04B15/06—Free escapements

Definitions

  • the present invention relates to a detent escapement for a timepiece comprising a pendulum secured to a pulse element, an escape wheel whose toothing intersects the trajectory of the pulse element, a trigger rocker having a stop member and a release member, means for engaging the stop member in the path of the toothing of the escape wheel, and a release finger or pallet integral with the rocker for rotation engaged with the rocker release member once per swing period of the rocker arm to disengage the stop member from the toothing of the escape wheel.
  • the impulse of the escape wheel on the pendulum pulse finger can only occur in a direction of rotation of the pendulum, either once per oscillation period or alternately in half, the alternation corresponding to half a oscillation period.
  • This type of exhaust requires a release rocker which comprises firstly a stop element which cuts the path of the teeth of the escape wheel, and which further comprises a release element with which comes into engagement a release finger integral with the balance.
  • this release finger must come into engagement with the release element only during the alternation during which the rocker receives a pulse from the escape wheel, the stop element having to remain in engagement with the impeller. exhaust during the other alternation.
  • the release rocker comprises an elastic blade whose end free press against a stop of the rocker so that the blade causes the rocker in a direction of rotation of the rocker release finger, while in the opposite direction of rotation, the blade bends and lets the release finger without causing the release latch.
  • the sizing of the flexible parts of the trigger is clearly one of the critical points in the development of this exhaust. It requires sufficient rigidity to keep the stop in its natural position but, at the same time, it is not necessary that the energy to release the escape wheel or to perform the relaxation function is too high, the risk being a disturbance non-negligible balance-balance oscillator, associated with a significant drop in yield, or even the system shutdown.
  • the unlocking torque required for the release of the escape wheel also represents an operating safety (impact safety) which imposes a lower limit on the rigidity of the blade.
  • the object of the present invention is to overcome, at least in part, the aforementioned drawbacks.
  • this invention relates to a detent escapement for a timepiece according to claim 1.
  • this exhaust does not present certain risks of conventional expansion exhausts. If a shock moves the inertial organ to its other extreme position, the consequences will not be of an unfortunate nature. In one case, the release finger will meet the release member instead of fading and move the inertial member to its correct position with negligible effort. In the other case, instead of coming into contact with the release element, the finger will not meet it, which will lose an impulse to the pendulum and an increment to the gear, this having no impact on the good watchmaking as it is only an occasional event.
  • this exhaust reduces certain risks associated with the use of conventional expansion exhausts. Indeed, a shock applied to the timepiece may cause its balance to rotate beyond a normal operating angle, which leads, during the alternation where the pulse occurs, to a new release of the train of gear. There is a gallop, because two clearances and two pulses take place during the same alternation.
  • the system object of the invention does not present this kind of problem because the release finger is at that moment already erased from the path of the unlocking element and does not cause the displacement of the blocker and therefore no second pulse .
  • the detent escapement comprises an escape wheel 1 connected to a mainspring (not shown) by a finishing train (not shown) which tends to rotate the escapement wheel 1 ( Figures 1 to 7 ) in the opposite direction to clockwise.
  • a tooth of the escape wheel 1 bears against a stop element 2a, advantageously formed by a ruby paddle, of a release rocker 2.
  • This release rocker 2 is biased by a spring 3 which tends to to hold it against a stop 4, position in which the stop pallet 2a is engaged in the path of the teeth of the escape wheel, so that a tooth of this wheel bears against the stop pallet 2a as illustrated by the figure 1 .
  • the pulse and disengagement device associated with the pendulum pivot shaft is represented in detail by the Figures 8-10 . It comprises a circular plate 6 provided with a tubular element 6a designed to be driven on the balance shaft. This tubular element 6a has a partially circular outer section cut by two parallel outer flat faces 6b ( figure 8 ) on which is engaged a pulse ring 7, provided with an opening 7a ( figure 10 ) of complementary section to that of the outer section of the tubular element 6a.
  • the impulse ring 7 is retained axially between two retaining rings 8a, 8b driven.
  • the impulse ring 7 has a finger or impulse face 7b projecting from the outer lateral face of the impulse ring 7.
  • the finger of the impulse ring may be an insert such as a pallet.
  • Two pins 9 and 10, of semicircular sections in this example, are driven into two diametrically opposed openings 6c, 6d respectively and of corresponding sections, formed in the plate 6.
  • An inertial member 11, elliptical in this example, is provided with three openings 11a, 11b, 11c, two openings 11a, 11b are off center and preferably symmetrical and diametrically opposed.
  • One of these openings 11b is semicircular limited by two radii forming an angle greater than 180 ° to receive the pivot pin 10 of the inertial member 11 allowing it an angular displacement.
  • the other opening is elongated 11a to receive the pin 9.
  • the third opening is a central opening 11c for the clearance passage of the tubular portion 6a of the plate 6 and can be used, in the absence of the opening 11a and the ankle 9, to limit the displacement angular of the inertial member 11.
  • a release finger 11d protrudes from the outer lateral face of the inertial member 11.
  • This release finger 11d is of triangular shape in the example under consideration, with a radially oriented drive face. relative to the center of the inertial member 11 and an inclined face, as illustrated by the figure 8 .
  • the release finger could also be formed by a palette reported ruby, as the finger 7b.
  • the inclined face of the release finger 11d is used to push the inertial element 6 in the event that a shock would have moved to the projecting position when it should be in the retracted position.
  • the inertial member 11 is disposed at the base of the tubular portion 6a.
  • the openings 11a, 11b, 11c are arranged, dimensioned and shaped to allow the inertial member 11 to perform a limited angular displacement around the axis of the pin 10, which is parallel to the axis of the tray 6 driven on the pivot shaft of the balance, and which constitutes the pivoting member of the inertial member 11.
  • the elongate opening 11a extends symmetrically to a diameter of the inertial element 11 passing through the respective axes of the openings 11b , 11c, so that the two limit positions of the inertial member 11 are respectively symmetrically on either side of the axis of pivoting of the balance.
  • the axes of the two openings 11a, 11b occupy diametrically opposite and symmetrical positions relative to the center of the inertial member 11.
  • the pins 9, 10 also occupy diametrically opposite positions and symmetrical relative to the center of the circular plate 6 to cooperate with the respective openings 11a, 11b.
  • the angular position occupied by the inertial member 11 corresponds to that in which the release finger 11d protrudes outside the periphery of the circular plate 6.
  • the radial face the triangular finger meets a clearance member 2b located at the free end of the release rocker 2, so that the release finger 11d raises the release rocker 2 against the pressure of the return spring 3, as illustrated by the figure 2 .
  • the figure 4 illustrates the return of the release lever 2 under the pressure of the spring 3 against the stop 4 after the release of the rocker by the release finger 11d, so that when the tooth of the escape wheel is released by the finger d 7b impulse, another tooth of the escape wheel is stopped by the pallet 2a of the release lever 2, as illustrated by the figure 5 .
  • This figure 5 also illustrates the reversal of the direction of rotation of the balance which passes from the rotation in the direction of clockwise to a rotation of opposite direction.
  • the balance shaft is integral in rotation with the pulse finger 7b and the release finger 11d.
  • the balance is braked by the spiral spring, and passes through a zero speed before being driven in the opposite direction of rotation.
  • the inertial member 11 has two stable positions, each dependent on the direction of rotation of the balance.
  • the Tests carried out show that the inertial member 11 moves before the pendulum has completed each of the two alternations making up its oscillation period, but its rotation around the ankle 10 begins around the neutral point of the pendulum (angle 0 of its position ).
  • the pendulum In neutral, the pendulum has the maximum speed and thus passes from a positive acceleration to a negative acceleration (it starts to decelerate) and that is when the inertial effects begin to be felt.
  • This behavior depends on the inertia of the inertial member 11, (material, geometry, in particular), of the friction between the inertial member 11 and the surfaces with which it is in contact, but it is also influenced by the effect of the centrifugal force acting on the center of mass of the inertial member 11 (offset relative to the axis of rotation of the balance) and which is added to the initial acceleration due to the balance.
  • the inertial member 11 is moved clockwise about the axis of the pin 10. In this position, the release finger 11d is retracted inside the peripheral edge of the circular plate 6.
  • the release finger 11d does not cooperate with the disengagement latch 2 as it passes opposite the disengagement member 2b, as illustrated by FIG. figure 6 .
  • the clearance finger 11d has no elastic element to overcome to pass the obstacle of the element 2b of the trigger rocker 2 during the alternation of the balance where this one does not receive a maintenance pulse of its oscillating movement, since the finger disappears inside the circular periphery of the plate 6. There is therefore no loss of energy or disturbance of the pendulum swing period.
  • the figure 11 is a diagram of the angular displacement of the balance during a period of oscillation. It is to be compared with the diagram of the figure 12 which shows the angular displacement of the inertial member 11 between its two limit positions determined by the two radial edges of the opening 11a alternately abutting against the pin 9 secured to the plate 6.
  • the angular displacement of the inertial member 11 between its two limit positions is only a few degrees, typically of the order of 5 ° to 10 °, these two limit positions being located symmetrically on either side of the pivoting axis of the balance.
  • This inertial member 11 may be made of a low specific mass material, the inertial effect being always sufficient to guarantee the function.
  • the freedom of choice of the outer geometrical shape makes it possible to produce an inertial element of symmetrical shape, which guarantees a weak added imbalance.
  • a sparse material such as silicon, the influence on the equilibrium of the balance is negligible.
  • the inertial member 11 made of nickel by the LIGA technique with a small thickness, typically of the order of 0.10 to 0.15 mm, so that the influence on the equilibrium of the balance can be considered. as negligible.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Micromachines (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Vibration Dampers (AREA)

Claims (4)

  1. Chronometerhemmung für eine Uhr mit einer Unruh, die mit einem Anstoßelement (7a) gekoppelt ist, mit einem Ankerrad (1), dessen Zahnung die Trajektorie des Anstoßelementes (7a) schneidet, mit einer Abzugswippe (2), die über ein Arretierelement (2a) und über ein Freigabeelement (2b) verfügt, mit elastischen Rückzugsmitteln (3), um das Arretierelement (2a) in die Trajektorie der Zahnung des Ankerrades (1) einzubringen, und mit einem Freigabefinger (11d), der dazu eingerichtet ist, bei Drehung mit der Unruh in Verbindung zu kommen, um mit dem Freigabeelement (2b) der Abzugswippe (2) einmal pro Schwingungsperiode der Unruh in Eingriff zu kommen, um das Arretierelement (2a) außer Eingriff mit der Zahnung des Ankerrades (1) zu bringen, wobei der Freigabefinger (11 d) mit einem Trägheitsorgan (11) verbunden ist, das frei zwischen zwei Extrempositionen montiert ist, wobei in einer die Trajektorie des Freigabefingers (11 d) von dem Freigabeelement (2b) der Wippe (2) durchlaufen ist und wobei in der anderen diese Trajektorie durch das Freigabeelement (2b) nicht durchlaufen ist, wobei der Durchlauf des Trägheitsorgans (11) von einer Position in die andere aus der Trägheitskraft resultiert, die auf das Trägheitsorgan einwirkt und durch die Geschwindigkeitsänderungen der Unruh während jeder Halbschwingung der Unruh hervorgerufen ist.
  2. Chronometerhemmung nach Anspruch 1, bei der das Trägheitsorgan (11) ein Element ist, das an einer Platte (6) angebracht ist, die mit der Drehwelle der Unruh verbunden ist, und zwar über ein Schwenkorgan (10), um eine zu der Schwenkachse der Unruh parallele Achse und in Bezug auf die Mitte dieses Elements versetzt, die mit einer Ausnehmung (11 c) versehen ist, um die Drehwelle der Unruh spielbehaftet durchtreten zu lassen, wobei die beiden das Trägheitsorgan (11) begrenzenden Positionen sich jeweils symmetrisch beidseitig der Schwenkachse der Unruh befinden.
  3. Hemmung nach Anspruch 2, bei der eines der Organe, die Platte (6), das Element des Trägheitsorgans (11), zwei Schwenkzapfen (10, 9) jeweils zum Begrenzen der Winkelbewegung trägt, die zwei diametral einander gegenüberliegende und symmetrische Positionen einnehmen, während das andere der Organe über zwei Ausnehmungen (11 b, 11a) verfügt, deren Achsen zwei entsprechende diametral einander gegenüberliegende und symmetrische Positionen einnehmen, die dazu eingerichtet sind, zugeordnete Zapfen (10, 9) aufzunehmen, wobei das Element des Trägheitsorgans (11) über eine mittige Ausnehmung verfügt, um den spielbehafteten Durchtritt eines rohrartigen Einpresselements (6a) an der Unruhwelle zu gestatten, das mit der Platte (6) verbunden ist.
  4. Hemmung nach Anspruch 3, bei der das rohrartige Einpresselement (6a) auf die Welle der Unruh einen abschnittsweise kreisförmigen Außenabschnitt aufweist, mit dem ein mit dem Anstoßelement (7a) ausgestatteter Ring (7) in Eingriff ist, wobei der Querschnitt der Ausnehmung dieses Rings (7) komplementär zu dem äußeren Querschnitt des rohrartigen Elementes (6a) ist und wobei der Ring (7) an dem rohrartigen Element durch einen Haltering (8) axial gehalten ist.
EP09405206.5A 2008-12-16 2009-11-26 Chronometerhemmung Active EP2199875B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09405206.5A EP2199875B1 (de) 2008-12-16 2009-11-26 Chronometerhemmung

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP08405306 2008-12-16
EP09405029A EP2221677A1 (de) 2009-02-16 2009-02-16 Riegelhemmung
EP09405206.5A EP2199875B1 (de) 2008-12-16 2009-11-26 Chronometerhemmung

Publications (3)

Publication Number Publication Date
EP2199875A2 EP2199875A2 (de) 2010-06-23
EP2199875A3 EP2199875A3 (de) 2011-07-27
EP2199875B1 true EP2199875B1 (de) 2014-09-24

Family

ID=42062443

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09405206.5A Active EP2199875B1 (de) 2008-12-16 2009-11-26 Chronometerhemmung

Country Status (4)

Country Link
US (1) US7927008B2 (de)
EP (1) EP2199875B1 (de)
JP (1) JP5406000B2 (de)
CN (1) CN101750953B (de)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5366318B2 (ja) * 2009-09-14 2013-12-11 セイコーインスツル株式会社 デテント脱進機およびデテント脱進機の作動レバーの製造方法
JP5441168B2 (ja) * 2010-03-10 2014-03-12 セイコーインスツル株式会社 デテント脱進機と機械式時計
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
EP2450755B1 (de) * 2010-11-04 2015-01-21 Nivarox-FAR S.A. Synchronhemmung für Uhrwerk
JP5794613B2 (ja) * 2011-03-11 2015-10-14 セイコーインスツル株式会社 時計用デテント脱進機、及び機械式時計
JP5885587B2 (ja) * 2011-06-10 2016-03-15 セイコーインスツル株式会社 デテント脱進機およびそれを組み込んだ時計
JP5723229B2 (ja) * 2011-06-10 2015-05-27 セイコーインスツル株式会社 デテント脱進機およびそれを組み込んだ時計
RU2606342C2 (ru) * 2012-03-29 2017-01-10 Ниварокс-Фар С.А. Гибкий анкерный механизм с балансом без ролика
WO2013144237A1 (fr) * 2012-03-29 2013-10-03 Nivarox-Far S.A. Mecanisme d'echappement flexible sans ancre
EP2730980B1 (de) * 2012-11-09 2018-08-29 Nivarox-FAR S.A. Uhrmechanismus zur Begrenzung oder Übertragung
CH712052A1 (fr) * 2016-01-21 2017-07-31 Dominique Renaud Sa Mécanisme d'échappement à coups perdus.
EP3293583A1 (de) * 2016-09-07 2018-03-14 Dominique Renaud SA Hemmungsmechanismus
EP3525046B1 (de) 2018-02-12 2024-07-10 The Swatch Group Research and Development Ltd Uhrwerkoszillator, der für winkelbeschleunigungen des tragens unempfindlich ist
CH715023A1 (fr) 2018-05-25 2019-11-29 Sa De La Manufacture Dhorlogerie Audemars Piguet & Cie Échappement à détente auto-démarrant et sécurisé pour pièce d'horlogerie
EP3770696B1 (de) * 2019-07-23 2021-12-01 Omega SA Anschlagkäfig für uhr mit aufzugstift und anschlagstift
EP3907566A1 (de) * 2020-05-05 2021-11-10 Montres Breguet S.A. Chronometerhemmung für uhren

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58193478A (ja) * 1982-05-08 1983-11-11 Zenkoushiya Tokei Kk 簡易脱進機
EP1041459B1 (de) * 1999-03-31 2002-09-18 Ulysse Nardin S.A. Hemmung für Zeitmesser
EP1538490B1 (de) * 2003-12-04 2007-05-30 Montres Breguet S.A. Chronometerhemmung für Armbanduhren
ATE390652T1 (de) * 2005-03-30 2008-04-15 Montres Breguet Sa Chronometerhemmung für uhren
EP1770452A1 (de) * 2005-09-30 2007-04-04 Peter Baumberger Chronometerhemmung für Uhren
EP1983388B1 (de) * 2007-04-18 2010-01-20 ETA SA Manufacture Horlogère Suisse Direktimpulshemmung für Uhren
EP1983390B1 (de) * 2007-04-18 2009-11-04 ETA SA Manufacture Horlogère Suisse Ankerhemmung, die zwei Hemmungszahnräder umfasst
DE602007003445D1 (de) * 2007-04-18 2010-01-07 Eta Sa Mft Horlogere Suisse Hemmung, die zwei Hemmungsräder umfasst
EP2221677A1 (de) * 2009-02-16 2010-08-25 Rolex Sa Riegelhemmung

Also Published As

Publication number Publication date
CN101750953A (zh) 2010-06-23
JP2010145396A (ja) 2010-07-01
US7927008B2 (en) 2011-04-19
CN101750953B (zh) 2012-01-04
EP2199875A3 (de) 2011-07-27
US20100149926A1 (en) 2010-06-17
JP5406000B2 (ja) 2014-02-05
EP2199875A2 (de) 2010-06-23

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