EP2224292B1 - Echappement à impulsion directe, notamment à détente, pour mouvement d'horlogerie - Google Patents

Echappement à impulsion directe, notamment à détente, pour mouvement d'horlogerie Download PDF

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Publication number
EP2224292B1
EP2224292B1 EP10405034A EP10405034A EP2224292B1 EP 2224292 B1 EP2224292 B1 EP 2224292B1 EP 10405034 A EP10405034 A EP 10405034A EP 10405034 A EP10405034 A EP 10405034A EP 2224292 B1 EP2224292 B1 EP 2224292B1
Authority
EP
European Patent Office
Prior art keywords
path
escape wheel
teeth
clearance
rocker
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
EP10405034A
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German (de)
English (en)
French (fr)
Other versions
EP2224292A2 (fr
EP2224292A3 (fr
Inventor
Alexandre Chiuvé
Fabiano Colpo
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
Application filed by Rolex SA filed Critical Rolex SA
Priority to EP10405034A priority Critical patent/EP2224292B1/fr
Publication of EP2224292A2 publication Critical patent/EP2224292A2/fr
Publication of EP2224292A3 publication Critical patent/EP2224292A3/fr
Application granted granted Critical
Publication of EP2224292B1 publication Critical patent/EP2224292B1/fr
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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 direct impulse escapement, in particular a detent, for a watch movement, comprising a pendulum secured to a momentum element, an escapement wheel whose teeth intersect the trajectory of the element pulse, 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, a release finger integral in rotation with the balance, and means for engaging said release finger with the latch release member once per swing period of the balance to disengage the stop member from the toothing of the escape wheel, in wherein said means for engaging the stop member in the path of the toothing of the escape wheel comprises a sliding surface integral with the trigger rocker, arranged to enter the trailing jectoire of the toothing of the escape wheel when the stop element comes out, this sliding surface being shaped so that the force exerted on it by a tooth of the escape wheel causes the return of the element of stopping of the trigger rocker in the path of the toothing of the escape wheel.
  • the second flexible element is necessary to return the blocker to its initial position.
  • the system must overcome the draft of the escape wheel and the second flexible element, which causes a considerable loss of energy because the energy supplied to the second flexible element to deform it (about 50% of the total energy needed to release the wheel) is lost.
  • the sizing of the trigger is clearly one of the critical points in the development of the trigger escapement. It requires sufficient rigidity to keep the escapement wheel locked but, at the same time, it does not take too much energy to release the escape wheel during the impulse to be provided to the balance, the risk being a disturbance no - Negligible spiral balance system and a significant drop in the associated performance.
  • the unlocking torque required for the release of the escape wheel also represents a shock-proofing which imposes a lower limit on the rigidity of the second flexible element.
  • the object of the present invention is to overcome, at least in part, the aforementioned drawbacks.
  • the subject of the present invention is a direct-impulse escapement, in particular an expansion escapement for a watch movement according to claim 1.
  • the main advantage of such an exhaust is to increase the safety with respect to shocks.
  • the trigger rocker with a stop element and a sliding surface which penetrate alternately in the path of the toothing of the escape wheel constitutes additional security.
  • the exhaust illustrated by the figure 1 comprises an escape wheel 1 whose circular trajectory of the teeth intersects the trajectory of a pulse pallet 2 integral with the balance 3 associated with a spiral (not shown).
  • a trigger rocker 4 can move freely between two stops 5, 6. It comprises on the one hand a stop element whose stop face 4a serves to stop a tooth of the escape wheel 1 and secondly a sliding surface 4b to allow a tooth of the escape wheel to slide on this surface 4b and to tilt the rocker in the opposite direction of that of the clockwise to bring the abutment face in the trajectory of the teeth of the escape wheel 1.
  • This trigger rocker 4 further comprises an elastic release member 4c bearing against a stop 4d and whose free end enters the path of a release finger 7 integral with the rocker 3.
  • the stop element of the trigger rocker 4 still has a safety surface 4e which is situated outside the path of the teeth of the escape wheel 1 and adjacent to this trajectory when the trigger rocker 4 bears against the stop 5 ( Figures 3 to 6 ). This surface extends over an angle of the escape wheel 1 corresponding to the angle during which a tooth of the escape wheel communicates its impulse to the pulse pallet 2 of the balance 3.
  • the balance 3 rotates in the opposite direction of that of the clockwise.
  • the abutment face 4a of the stop element of the latch 4 retains the escape wheel 1 which holds the latch 4 against the abutment 6.
  • the phase illustrated by the figure 2 corresponds to the moment when the release finger 7 integral with the rocker 3 meets the elastic release member 4c bearing against the abutment 4d. Due to the stop 4d and the direction of rotation opposite that of clockwise balance 3, the elastic release element 4c behaves as a rigid element.
  • the trigger rocker 4 then passes under the action of the release finger 7 of the abutment against the abutment 6 against the abutment 5 ( figure 3 ), thus releasing the escape wheel 1, one tooth of which was stopped by the abutment face 4a of the stop element of the trigger rocker 4.
  • the escape wheel 1 is subjected to the torque of the mainspring (not shown) transmitted by the finishing train (not shown), is then driven in the direction of clockwise. One of his teeth then meets the impulse pallet 2 of the pendulum 3 ( figure 4 ). This is the beginning of the impulse phase during which the energy of the mainspring is transmitted to the balance 3 to transmit the energy necessary to maintain its oscillating movement.
  • This impulse phase ends when the tooth of the escape wheel leaves the impulse pallet, that is, practically in the position illustrated by the figure 5 .
  • the safety surface 4e of the stop element of the trigger rocker 4 prevents the stop member from entering the path of the teeth of the wheel exhaust 1, following an impact for example.
  • the escape wheel 1 After the impulse phase, the escape wheel 1 continues its rotation and one of its teeth meets the sliding surface 4b ( figure 6 ). By sliding against this surface 4b, the tooth of the escape wheel rotates the lever 4 in the opposite direction of that of the clockwise and returns it against the stop 6 ( figure 7 ). This tilting also brings the stop element of the rocker 4 into the path of the teeth of the escape wheel 1, so that a tooth of the escape wheel abuts against the abutment face 4a of the stopping element and exerts on the rocker 4 a couple which holds it against the abutment 6 ( figure 8 ).
  • the rocker 3 continues its rotation until it is stopped by the hairspring and is driven in a counter-clockwise rotation ( figure 11 ), thus starting a new oscillation cycle.
  • the figure 12 represents a variant of the pulse and release device associated with the pivoting shaft of the balance in replacement of the pulse pallet and the release finger of the previous embodiment.
  • This variant comprises a circular plate 12 provided with a tubular element 12a designed to be driven on the balance shaft.
  • This tubular element 12a has a partially circular outer section cut by two parallel outer plane faces 12b on which is engaged a pulse ring 13, provided with an opening 13a of complementary section to that of the outer section of the tubular element 12a .
  • the impulse ring 13 is retained axially between two retaining rings 8a, 8b driven.
  • the impulse ring 13 has a finger or pulse face 13b projecting from the outer lateral face of the impulse ring 13.
  • the finger of the impulse ring may be an insert such as a pallet.
  • Two pegs 9 and 10, of semicircular sections in this example, are driven into two diametrically opposed openings 12c, 12d respectively and of corresponding sections, formed in the plate 12.
  • An inertial member 11 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 a pivot pin 10 of the inertial member 11 allowing it an angular displacement.
  • the other opening is elongate 11a to receive the pin 9.
  • the third opening is a central opening 11c for the clearance passage of the tubular portion 12a of the plate 12 and can be used, in the absence of the opening 11a and the pin 9, to limit the angular displacement 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 in question, with a drive face oriented radially relative to the center of the inertial member 11 and the other inclined face.
  • the release finger 11d could also be formed by a reported palette, ruby for example.
  • the inclined face of the release finger 11d is used to push the inertial element 12 in the event that a shock would have moved it into a projecting position when it should be in the retracted position.
  • the inertial member 11 is disposed at the base of the tubular portion 12a.
  • 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 12 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 release finger 11d protrudes outside the periphery of the circular plate 12.
  • the radial face of the triangular finger meets the clearance element 4c which no longer needs to be elastic, so that the release finger 11d raises the trigger rocker 4.
  • 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 balance 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 balance (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.
  • the release finger 11d does not cooperate with the trigger rocker 4 as it passes vis-à-vis the release member 4c.
  • the clearance finger 11d has no element to overcome to pass the obstacle of the element 4c of the disengagement lever 4 during the alternation of the balance wheel or the it does not receive a maintenance pulse of its oscillating movement, since the finger disappears inside the circular periphery of the plate 12. There is therefore no energy loss or disturbance of the oscillation period of the pendulum.
  • 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 axis of pivoting of the balance.
  • This inertial member 11 may be made of a material of low specific mass, 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. Experience shows that with a sparse material such as silicon, the influence on the equilibrium of the balance is negligible.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transmission Devices (AREA)
  • Micromachines (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
EP10405034A 2009-02-26 2010-02-24 Echappement à impulsion directe, notamment à détente, pour mouvement d'horlogerie Active EP2224292B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10405034A EP2224292B1 (fr) 2009-02-26 2010-02-24 Echappement à impulsion directe, notamment à détente, pour mouvement d'horlogerie

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP09405037 2009-02-26
EP10405034A EP2224292B1 (fr) 2009-02-26 2010-02-24 Echappement à impulsion directe, notamment à détente, pour mouvement d'horlogerie

Publications (3)

Publication Number Publication Date
EP2224292A2 EP2224292A2 (fr) 2010-09-01
EP2224292A3 EP2224292A3 (fr) 2011-09-21
EP2224292B1 true EP2224292B1 (fr) 2012-10-10

Family

ID=40934951

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10405034A Active EP2224292B1 (fr) 2009-02-26 2010-02-24 Echappement à impulsion directe, notamment à détente, pour mouvement d'horlogerie

Country Status (4)

Country Link
US (1) US8087819B2 (ja)
EP (1) EP2224292B1 (ja)
JP (1) JP5596370B2 (ja)
CN (1) CN101819403B (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11397408B2 (en) 2018-05-25 2022-07-26 Société Anonyme de la Manufacture d'Horlogerie Audemars Piguet & Cie Automatically starting and secured detent escapement for a timepiece

Families Citing this family (15)

* 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
JP5366319B2 (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それを有する機械式時計
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
WO2011120180A1 (fr) * 2010-04-01 2011-10-06 Rolex S.A. Dispositif de blocage pour roue dentée
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
EP2450757B1 (fr) * 2010-11-04 2014-10-15 Nivarox-FAR S.A. Dispositif anti-galop pour mécanisme d'échappement
EP2450755B1 (fr) 2010-11-04 2015-01-21 Nivarox-FAR S.A. Echappement synchrone pour mécanisme d'horlogerie
EP2450756B1 (fr) 2010-11-04 2015-01-07 Nivarox-FAR S.A. Dispositif anti-galop pour mécanisme d'échappement
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
TWI562560B (en) 2011-05-09 2016-12-11 Sony Corp Encoder and encoding method providing incremental redundancy
EP2735921B1 (fr) * 2011-08-29 2017-10-04 ETA SA Manufacture Horlogère Suisse Porte-échappement d'horlogerie
KR101676148B1 (ko) * 2012-03-29 2016-11-14 니바록스-파 에스.에이. 가요성 레버-프리 이스케이프먼트 메카니즘
EP2947522B1 (fr) * 2014-05-20 2017-05-03 Société anonyme de la Manufacture d'Horlogerie Audemars Piguet & Cie Ancre d horlogerie pour oscillateur mécanique et mécanisme de déclenchement temporisé d horlogerie
KR20170125803A (ko) * 2014-12-09 2017-11-15 엘브이엠에이치 스위스 매뉴팩츄어스 에스에이 시계용 장치 및 상기 장치를 구비한 시계
EP3907566A1 (fr) * 2020-05-05 2021-11-10 Montres Breguet S.A. Échappement à détente pour pièce d'horlogerie

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US40508A (en) * 1863-11-03 Improvement in time-keepers
US51191A (en) * 1865-11-28 Improvement in chronometer-escapements
US1091261A (en) * 1913-07-22 1914-03-24 William E Walker Chronometer-escapement.
US3538705A (en) * 1968-11-07 1970-11-10 Hamilton Watch Co Escapement
CH1020375A4 (ja) * 1975-08-05 1977-06-30
DE602005005632T2 (de) * 2005-03-30 2009-04-16 Montres Breguet S.A. Chronometerhemmung für Uhren

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11397408B2 (en) 2018-05-25 2022-07-26 Société Anonyme de la Manufacture d'Horlogerie Audemars Piguet & Cie Automatically starting and secured detent escapement for a timepiece

Also Published As

Publication number Publication date
EP2224292A2 (fr) 2010-09-01
CN101819403A (zh) 2010-09-01
JP5596370B2 (ja) 2014-09-24
US8087819B2 (en) 2012-01-03
JP2010197393A (ja) 2010-09-09
US20100214881A1 (en) 2010-08-26
EP2224292A3 (fr) 2011-09-21
CN101819403B (zh) 2012-02-29

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