EP3475765A1 - Timepiece escapement - Google Patents

Timepiece escapement

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Publication number
EP3475765A1
EP3475765A1 EP17733910.8A EP17733910A EP3475765A1 EP 3475765 A1 EP3475765 A1 EP 3475765A1 EP 17733910 A EP17733910 A EP 17733910A EP 3475765 A1 EP3475765 A1 EP 3475765A1
Authority
EP
European Patent Office
Prior art keywords
rocker
winding
armature
elastic member
escapement
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.)
Granted
Application number
EP17733910.8A
Other languages
German (de)
French (fr)
Other versions
EP3475765B1 (en
Inventor
Stéphane OES
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.)
Patek Philippe SA Geneve
Original Assignee
Patek Philippe SA Geneve
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 Patek Philippe SA Geneve filed Critical Patek Philippe SA Geneve
Publication of EP3475765A1 publication Critical patent/EP3475765A1/en
Application granted granted Critical
Publication of EP3475765B1 publication Critical patent/EP3475765B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • G04B17/04—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
    • 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
    • G04B15/00—Escapements
    • G04B15/14—Component parts or constructional details, e.g. construction of the lever or the escape wheel

Definitions

  • the present invention relates to a watch exhaust, that is to say a mechanism for maintaining and counting the oscillations of a watch regulator.
  • the present invention more particularly relates to an escapement comprising a bistable elastic member receiving energy from a drive member, for example a cylinder, and communicating it to the regulator.
  • a bistable elastic member receiving energy from a drive member, for example a cylinder, and communicating it to the regulator.
  • An escapement of this type is described in patent applications WO 99/64936, WO 2009/1 18310 and CH 705674.
  • the bistable elastic member is a leaf spring working in buckling mode.
  • the leaf spring is fixed at both ends to recesses or pivoting members, and its midpoint is kept aligned with said two ends. The distance separating the two recesses is such that the leaf spring undergoes a compression which forces it to deform according to a second mode buckling.
  • the leaf spring thus has two convexities of opposite directions on either side of its midpoint.
  • the leaf spring can occupy two stable states, the transition from one to the other of these stable states being effected by reversing the direction of the two conve
  • an armature lever acting symmetrically in the region of the two convexities deforms the leaf spring from a first of its stable states to a metastable state close to an unstable state corresponding to a fourth mode buckling, to arm the leaf spring.
  • a trigger rocker located in the area of the midpoint acts on the leaf spring to make it exceed its unstable state and make it switch to its second stable state by releasing its energy.
  • the armrest lever is alternately actuated by two escape wheels integral with escape gears which mesh with the last mobile of the finishing gear of the timepiece.
  • the trigger rocker cooperates with a balance-spiral regulator and comprises for this purpose a fork of the same type as conventional anchor forks.
  • the exhaust wheels comprise at their periphery cams for arming for actuating the rocker arming. These armature cams end with locking stops.
  • the arming phase of the leaf spring by the arming lever ends when it is blocked by one of the locking stops of the escapement wheel with which it cooperates, which keeps the leaf spring in its position. metastable state and immobilizes the two escape wheels, the finishing gear and the armature rocker.
  • the deformation of the leaf spring from its metastable state to its second stable state under the action of the plate pin and its detent causes a rotation of the armature rocker which unlocks the escape wheels and causes the rocker to arming in contact with the other escape wheel to start a symmetrical cycle of the previous, after the impulse given to the plateau pin.
  • the present invention aims to remedy these drawbacks, or at least to mitigate them, and proposes for this purpose a clockwork escapement comprising a bistable elastic member, an armature rocker arranged to arm the bistable elastic member during phases of rotation. arming, and a trigger rocker arranged to be driven by an expansion of the resilient bistable member after each arming phase to communicate a pulse to a regulator, characterized in that it comprises a single escape wheel for driving the rocking arm during the winding phases, the escapement comprising a winding member arranged to cooperate with the winding elements of the rocking arm, in the manner of a gear, to make rotate the armature rocker alternately in opposite directions.
  • the armoring elements are defined by an inner wall of a portion of the armature rocker which surrounds the armoring member.
  • said inner wall follows over substantially 360 ° the trajectory of the crown of a tooth of the armoring member in a reference frame connected to the armature rocker during the rotation of the armoring member, in order to abut against the arming member in case of shock and thus secure the position of the rocker arming.
  • the elements of arming are for example pins.
  • the armoring member is for example a star.
  • the trigger rocker is arranged to cooperate with the bistable elastic member in the region of a midpoint of the bistable elastic member and the armature rocker is arranged to cooperate with the bistable elastic member on both sides. another of said area.
  • an escapement for a watch movement comprises an escapement wheel 1, a bistable leaf spring 2, a winding lever 3 and a trigger rocker 4.
  • the escapement wheel 1 rotates about an axis A, in the direction indicated by the arrow F1, under the action of the drive member of the movement, typically formed by one or more barrels.
  • the escapement wheel 1 comprises an escape pinion 5 which meshes with the movement finishing gear, a winding member 6 which, in the example shown, is in the form of a star, and a wheel of locking 7 having at its periphery inclined teeth 8.
  • the escape gear 5, the winding star 6 and the locking wheel 7 are coaxial and integral.
  • the winding star 6 and the locking wheel 7 can be in one piece.
  • the armature rocker 3 and the rocker trigger 4 pivot about the same imaginary axis B which corresponds to the midpoint of the leaf spring 2, but are free to rotate relative to each other.
  • the imaginary axis B is for example the axis of a rod (physical axis) driven into the armature rocker 3, pivoting in bearings of the frame of the movement and around which pivots the trigger rocker 4.
  • the latches 3, 4 could be mounted on respective axes offset relative to each other, like the armature and trigger rockers described in the patent application WO 99/64936.
  • the latches 3, 4 may not be mounted on physical axes but be guided around the same imaginary axis or two respective imaginary axes by flexible guiding systems.
  • the leaf spring 2 is integral with the trigger rocker 4 and consists of two elastic blades 2a, 2b each having an end joined to the trigger rocker 4 and another end joined to the frame of the movement. Said other end of each elastic blade 2a, 2b can be joined to the frame of the movement via an outer frame (not shown) surrounding the leaf spring 2 and fixed to said frame, outer frame which can be integral with the spring -lame 2, as described in patent applications WO 2009/1 18310 and CH 705674.
  • the leaf spring 2 may also be an insert relative to the trigger rocker 4 and the outer frame.
  • the leaf spring 2 has two convexities of opposite directions on either side of its midpoint and can move from a first stable state to a second stable state by reversing the direction of each of the two convexities.
  • the leaf spring 2 is either prestressed so as to work in buckling or preformed for, in the state of rest, already have two convexities as described in the international patent application WO 2017/032528 of the present applicant.
  • the outer frame is deformable to allow buckling of the leaf spring 2.
  • the outer frame is rigid.
  • the armature rocker 3 comprises two arms carrying at their ends two pins 3a, 3b engaged in eyelets (not shown) of the two resilient blades 2a, 2b respectively.
  • the armature rocker 3 further comprises a ring-shaped portion 9 which surrounds the winding star 6.
  • the inner wall 10 of this part 9 has winding elements 1 1, 12 (see FIG. ) constituted by lugs, and is further irregularly shaped to fulfill a safety function against shocks, that is to say to prevent a rotation of the armature rocker 3 beyond a certain clearance when a rotary or linear shock received by the watch movement.
  • the inner wall 10 of the part 9 follows on substantially 360 ° the trajectory of the vertex of any one of the teeth of the winding star 6 in a reference linked to the armature rocker 3 during the rotation of the winding star 6 and oscillations of the armature rocker 3 which result, to abut against the winding star 6 in case of shock.
  • the positioning of the armature rocker 3 is guaranteed by a small clearance, predefined, and thus prevents the armature rocker 3 triggers the tilting of the leaf spring 2 inadvertently.
  • the trigger rocker 4 comprises an inlet arm 13 terminated by an inlet spout 14 and an outlet arm 15 terminated by an outlet spout 16. These inlet and outlet spouts 14, 16 are arranged to cooperate with the teeth 8 of the locking wheel 7, as will be explained below.
  • the trigger rocker 4 also comprises a rod 17 ending in a fork 18 similar to that of a traditional anchor, comprising a first horn 19 and a second horn 20.
  • the fork 18 is arranged to cooperate with a plateau pin 21 worn by a large plate 22 coaxial and integral movement regulator.
  • the regulator (not shown) oscillates around an axis C, for example of the spring-balance type but can also be an oscillator without physical axis, with flexible blades.
  • First and second limiting abutments 25, 26 fixed relative to the frame of the movement limit the angular movement of the trigger rocker 4. These limit stops 25, 26 are for example in the form of pins, as shown, or 'étoqueaux. They can be integral with the outer frame of the leaf spring 2.
  • the escapement according to the invention operates according to cycles each corresponding to an oscillation (two alternations) of the regulator.
  • Each cycle comprises two half-cycles.
  • Each half-cycle corresponds to an alternation of the regulator and includes the following phases: arming, locking, relaxation.
  • the arming phase of the first half-cycle begins when a tooth 6a of the winding star 6 encounters a first, 1 1, winding elements 1 1, 12 of the armature rocker 3 (cf. figure 1 ). By continuing its movement, the tooth 6a pushes this first armoring element 1 1, which pivots the armature rocker 3 about its axis B in the direction indicated by the arrow F2. This movement of the armature rocker 3 arms the leaf spring 2 by passing it from a first stable state to a metastable state close to an unstable state. This deformation of the leaf spring 2 is imperceptible in the area of the midpoint, so that the trigger rocker 4 remains stationary.
  • the leaf spring 2 then releases the energy accumulated during the arming by switching to its second stable state, which is the opposite of the first stable state. This is the relaxation phase.
  • This sudden deformation of the leaf spring 2 rotates the trigger rocker 4 in the direction F2.
  • the inlet nose 14 of the trigger rocker 4 leaves the tooth 8a of the locking wheel 7, overcoming the force pressing against said input spout 14 under the action of the drive member of the movement, and unlocks the escape wheel 1, then the inner face of the second horn 20 communicates a pulse to the plateau pin 21 and therefore to the regulator (see Figure 4).
  • the expansion phase ends when the trigger rocker 4 comes into abutment against the second limit stop 26 (see Figure 5) in the second stable state of the leaf spring 2.
  • the locking / unlocking of the mobile escapement 1 in the present invention is carried out directly by the trigger rocker 4 by means of the inlet and outlet nozzles 14, 16, so static, rather than by the armature rocker controlled by the leaf spring itself controlled by the trigger rocker as in the state of the art.
  • the leaf spring 2 is only used for the pulse to the regulator. This allows to unlock the mobile escape 1 early enough, that is to say before the regulator reaches its equilibrium position, to let the leaf spring 2 free to provide its momentum when the regulator is close to its equilibrium position . The moment of the beginning of the pulse can therefore be precise, which favors the isochronism of the regulator.
  • a single mobile escape 1 comprising the elements 1 1, 12 eliminates the need to index two mobile exhaust relative to each other, so facilitates assembly , and reduces clutter and inertia.
  • the cooperation between the teeth of the winding star 6 and the winding elements 1 1, 12 generates little or no friction, unlike the winding cams of the mechanism according to WO 99/64936, WO 2009/1 18310 and CH 705674, which slide on pins carried by the rocker arming.
  • the cooperation between the winding star 6 and the winding elements 1 1, 12 is similar to that of a gear, the winding star 6 exerting on the inner wall 10 a tangential force.
  • the winding star 6 and the locking wheel 7 could form a single piece on a single level.
  • the teeth of the star 6 would ensure in certain positions the arming and in other positions the locking.
  • the bistable elastic member that constitutes the leaf spring 2 could be formed of a single elastic blade 2a or 2b and the armature rocker 3 could comprise a single arm cooperating at its end with the elastic blade.
  • the bistable elastic member could comprise a plurality of leaf springs each comprising one or more elastic blades.
  • the mobile escape 1 could be located on the other side of the regulator or be coaxial with said regulator (that is to say, the C axis).

Abstract

The invention relates to a timepiece escapement comprising a bistable elastic member (2), a winding lever (3) arranged to wind the bistable elastic member (2) during winding phases, and a detent lever (4) arranged to be driven by a detent of said bistable elastic member (2) after each winding phase, in order to transmit an impulse to a regulator. The present timepiece escapement comprises a single escapement wheel (1) for driving the winding lever (3) during the winding phases. Said escapement wheel (1) comprises a winding member (6) arranged to engage with winding elements (11, 12) of said winding lever (3) in a meshing manner such that the winding lever (3) is made to pivot alternately in opposite directions.

Description

Echappement d'horlogerie  Clock escapement
La présente invention concerne un échappement d'horlogerie, c'est-à-dire un mécanisme servant à entretenir et compter les oscillations d'un régulateur horloger. The present invention relates to a watch exhaust, that is to say a mechanism for maintaining and counting the oscillations of a watch regulator.
La présente invention concerne plus particulièrement un échappement comprenant un organe élastique bistable recevant de l'énergie d'un organe moteur, par exemple un barillet, et la communiquant au régulateur. Un échappement de ce type est décrit dans les demandes de brevet WO 99/64936, WO 2009/1 18310 et CH 705674. L'organe élastique bistable est un ressort-lame travaillant en flambage. Le ressort-lame est fixé par ses deux extrémités à des encastrements ou à des organes de pivotement, et son point milieu est maintenu aligné avec lesdites deux extrémités. La distance séparant les deux encastrements est telle que le ressort-lame subit une compression qui le contraint à se déformer selon un flambage de second mode. Le ressort-lame présente ainsi deux convexités de sens opposés de part et d'autre de son point milieu. Le ressort-lame peut occuper deux états stables, le passage de l'un à l'autre de ces états stables s'effectuant en inversant le sens des deux convexités.  The present invention more particularly relates to an escapement comprising a bistable elastic member receiving energy from a drive member, for example a cylinder, and communicating it to the regulator. An escapement of this type is described in patent applications WO 99/64936, WO 2009/1 18310 and CH 705674. The bistable elastic member is a leaf spring working in buckling mode. The leaf spring is fixed at both ends to recesses or pivoting members, and its midpoint is kept aligned with said two ends. The distance separating the two recesses is such that the leaf spring undergoes a compression which forces it to deform according to a second mode buckling. The leaf spring thus has two convexities of opposite directions on either side of its midpoint. The leaf spring can occupy two stable states, the transition from one to the other of these stable states being effected by reversing the direction of the two convexities.
En fonctionnement, une bascule d'armage agissant symétriquement dans la zone des deux convexités déforme le ressort-lame depuis un premier de ses états stables jusqu'à un état métastable proche d'un état instable correspondant à un flambage de quatrième mode, pour armer le ressort-lame. Puis une bascule de détente située dans la zone du point milieu agit sur le ressort-lame pour lui faire dépasser son état instable et le faire ainsi basculer dans son deuxième état stable en libérant son énergie. La bascule d'armage est actionnée alternativement par deux roues d'échappement solidaires de pignons d'échappement qui engrènent avec le dernier mobile du rouage de finissage de la pièce d'horlogerie. La bascule de détente coopère avec un régulateur balancier-spiral et comprend à cet effet une fourchette du même type que les fourchettes d'ancres classiques. L'énergie permettant à la bascule de détente de déformer le ressort-lame au-delà de son état instable depuis son état métastable est fournie par le régulateur, lorsqu'une cheville de plateau solidaire du balancier percute une corne de la fourchette. Cette phase, qui nécessite un petit apport d'énergie, peut être comparée à la phase de dégagement d'un échappement à ancre. La détente du ressort-lame, c'est-à-dire son passage de son état instable à son deuxième état stable, change brusquement l'inclinaison de la zone du point milieu, ce qui fait pivoter la bascule de détente, laquelle communique alors une impulsion à la cheville de plateau. Cette phase, qui restitue une énergie nettement plus grande, peut être comparée à la phase d'impulsion d'un échappement à ancre. La différence réside dans le fait que ces deux phases correspondent à des échanges énergétiques parfaitement stables, ce qui ne saurait être le cas avec un échappement à ancre. In operation, an armature lever acting symmetrically in the region of the two convexities deforms the leaf spring from a first of its stable states to a metastable state close to an unstable state corresponding to a fourth mode buckling, to arm the leaf spring. Then a trigger rocker located in the area of the midpoint acts on the leaf spring to make it exceed its unstable state and make it switch to its second stable state by releasing its energy. The armrest lever is alternately actuated by two escape wheels integral with escape gears which mesh with the last mobile of the finishing gear of the timepiece. The trigger rocker cooperates with a balance-spiral regulator and comprises for this purpose a fork of the same type as conventional anchor forks. energy allowing the trigger rocker to deform the leaf spring beyond its unstable state since its metastable state is provided by the regulator, when a plate pin integral with the balance struck a horn of the fork. This phase, which requires a small energy input, can be compared to the release phase of an anchor escapement. The expansion of the leaf spring, that is to say its passage from its unstable state to its second stable state, suddenly changes the inclination of the zone of the midpoint, which causes the trigger rocker to pivot, which then communicates an impulse at the plateau ankle. This phase, which gives a much larger energy, can be compared to the impulse phase of an anchor escapement. The difference lies in the fact that these two phases correspond to perfectly stable energy exchanges, which can not be the case with an anchor escapement.
A la place de dents, les roues d'échappement comprennent à leur périphérie des cames d'armage pour l'actionnement de la bascule d'armage. Ces cames d'armage se terminent par des butées de verrouillage. La phase d'armage du ressort-lame par la bascule d'armage se termine lorsque cette dernière est bloquée par l'une des butées de verrouillage de la roue d'échappement avec laquelle elle coopère, ce qui maintient le ressort-lame dans son état métastable et immobilise les deux roues d'échappement, le rouage de finissage et la bascule d'armage. La déformation du ressort-lame de son état métastable à son deuxième état stable sous l'action de la cheville de plateau puis de sa détente cause une rotation de la bascule d'armage qui déverrouille les roues d'échappement et amène la bascule d'armage au contact de l'autre roue d'échappement pour commencer un cycle symétrique du précédent, après l'impulsion donnée à la cheville de plateau.  In place of teeth, the exhaust wheels comprise at their periphery cams for arming for actuating the rocker arming. These armature cams end with locking stops. The arming phase of the leaf spring by the arming lever ends when it is blocked by one of the locking stops of the escapement wheel with which it cooperates, which keeps the leaf spring in its position. metastable state and immobilizes the two escape wheels, the finishing gear and the armature rocker. The deformation of the leaf spring from its metastable state to its second stable state under the action of the plate pin and its detent causes a rotation of the armature rocker which unlocks the escape wheels and causes the rocker to arming in contact with the other escape wheel to start a symmetrical cycle of the previous, after the impulse given to the plateau pin.
Un tel échappement présente plusieurs inconvénients. Les deux roues d'échappement nécessitent d'être précisément positionnées angulairement l'une par rapport à l'autre ce qui rend le montage de l'échappement relativement compliqué. De plus, ces deux roues augmentent l'inertie et affectent donc le rendement de l'échappement. Le rendement de l'échappement est aussi affecté par les cames d'armage des roues d'échappement qui produisent beaucoup de frottements. Such an exhaust has several disadvantages. The two escape wheels need to be precisely positioned angularly relative to each other, which makes the mounting of the exhaust relatively complicated. In addition, these two wheels increase the inertia and therefore affect the exhaust performance. The performance of the exhaust is also affected by the cams of the exhaust wheels that produce a lot of friction.
La présente invention vise à remédier à ces inconvénients, ou au moins à les atténuer, et propose à cette fin un échappement d'horlogerie comprenant un organe élastique bistable, une bascule d'armage agencée pour armer l'organe élastique bistable pendant des phases d'armage, et une bascule de détente agencée pour être entraînée par une détente de l'organe élastique bistable après chaque phase d'armage afin de communiquer une impulsion à un régulateur, caractérisé en ce qu'il comprend un unique mobile d'échappement pour entraîner la bascule d'armage pendant les phases d'armage, le mobile d'échappement comprenant un organe d'armage agencé pour coopérer avec des éléments d'armage de la bascule d'armage, à la manière d'un engrenage, pour faire pivoter la bascule d'armage alternativement dans des sens opposés.  The present invention aims to remedy these drawbacks, or at least to mitigate them, and proposes for this purpose a clockwork escapement comprising a bistable elastic member, an armature rocker arranged to arm the bistable elastic member during phases of rotation. arming, and a trigger rocker arranged to be driven by an expansion of the resilient bistable member after each arming phase to communicate a pulse to a regulator, characterized in that it comprises a single escape wheel for driving the rocking arm during the winding phases, the escapement comprising a winding member arranged to cooperate with the winding elements of the rocking arm, in the manner of a gear, to make rotate the armature rocker alternately in opposite directions.
De préférence, les éléments d'armage sont définis par une paroi intérieure d'une partie de la bascule d'armage qui entoure l'organe d'armage.  Preferably, the armoring elements are defined by an inner wall of a portion of the armature rocker which surrounds the armoring member.
Avantageusement, ladite paroi intérieure suit sur sensiblement 360° la trajectoire du sommet d'une dent de l'organe d'armage dans un repère lié à la bascule d'armage lors de la rotation de l'organe d'armage, afin de buter contre l'organe d'armage en cas de choc et sécuriser ainsi la position de la bascule d'armage.  Advantageously, said inner wall follows over substantially 360 ° the trajectory of the crown of a tooth of the armoring member in a reference frame connected to the armature rocker during the rotation of the armoring member, in order to abut against the arming member in case of shock and thus secure the position of the rocker arming.
Les éléments d'armage sont par exemple des ergots.  The elements of arming are for example pins.
L'organe d'armage est par exemple une étoile.  The armoring member is for example a star.
De préférence, la bascule de détente est agencée pour coopérer avec l'organe élastique bistable dans la zone d'un point milieu de l'organe élastique bistable et la bascule d'armage est agencée pour coopérer avec l'organe élastique bistable de part et d'autre de ladite zone. D'autres caractéristiques et avantages de la présente invention apparaîtront à la lecture de la description détaillée suivante faite en référence aux dessins annexés dans lesquels : Preferably, the trigger rocker is arranged to cooperate with the bistable elastic member in the region of a midpoint of the bistable elastic member and the armature rocker is arranged to cooperate with the bistable elastic member on both sides. another of said area. Other features and advantages of the present invention will appear on reading the following detailed description given with reference to the accompanying drawings in which:
- les figures 1 à 5 montrent des configurations successives d'un échappement selon l'invention pendant un premier demi-cycle de fonctionnement ; et  - Figures 1 to 5 show successive configurations of an exhaust according to the invention during a first half-cycle of operation; and
- les figures 6 à 8 montrent des configurations successives de l'échappement selon l'invention pendant un deuxième demi-cycle de fonctionnement.  - Figures 6 to 8 show successive configurations of the exhaust according to the invention during a second half-cycle of operation.
En référence à la figure 1 , un échappement pour mouvement d'horlogerie selon l'invention comprend un mobile d'échappement 1 , un ressort-lame bistable 2, une bascule d'armage 3 et une bascule de détente 4.  With reference to FIG. 1, an escapement for a watch movement according to the invention comprises an escapement wheel 1, a bistable leaf spring 2, a winding lever 3 and a trigger rocker 4.
Le mobile d'échappement 1 tourne autour d'un axe A, dans le sens indiqué par la flèche F1 , sous l'action de l'organe moteur du mouvement, formé typiquement par un ou plusieurs barillets. Le mobile d'échappement 1 comprend un pignon d'échappement 5 qui engrène avec le rouage de finissage du mouvement, un organe d'armage 6 qui, dans l'exemple représenté, est sous la forme d'une étoile, et une roue de verrouillage 7 présentant à sa périphérie des dents inclinées 8. Le pignon d'échappement 5, l'étoile d'armage 6 et la roue de verrouillage 7 sont coaxiales et solidaires. L'étoile d'armage 6 et la roue de verrouillage 7 peuvent être en une seule pièce.  The escapement wheel 1 rotates about an axis A, in the direction indicated by the arrow F1, under the action of the drive member of the movement, typically formed by one or more barrels. The escapement wheel 1 comprises an escape pinion 5 which meshes with the movement finishing gear, a winding member 6 which, in the example shown, is in the form of a star, and a wheel of locking 7 having at its periphery inclined teeth 8. The escape gear 5, the winding star 6 and the locking wheel 7 are coaxial and integral. The winding star 6 and the locking wheel 7 can be in one piece.
La bascule d'armage 3 et la bascule de détente 4 pivotent autour d'un même axe imaginaire B qui correspond au point milieu du ressort-lame 2, mais sont libres de pivoter l'une par rapport à l'autre. En pratique, l'axe imaginaire B est par exemple l'axe d'une tige (axe physique) chassée dans la bascule d'armage 3, pivotant dans des paliers du bâti du mouvement et autour de laquelle pivote la bascule de détente 4. En variante, toutefois, les bascules 3, 4 pourraient être montées sur des axes respectifs décalés l'un par rapport à l'autre, à l'instar des bascules d'armage et de détente décrites dans la demande de brevet WO 99/64936. Dans d'autres variantes, les bascules 3, 4 pourraient ne pas être montées sur des axes physiques mais être guidées autour d'un même axe imaginaire ou de deux axes imaginaires respectifs par des systèmes de guidage flexible. The armature rocker 3 and the rocker trigger 4 pivot about the same imaginary axis B which corresponds to the midpoint of the leaf spring 2, but are free to rotate relative to each other. In practice, the imaginary axis B is for example the axis of a rod (physical axis) driven into the armature rocker 3, pivoting in bearings of the frame of the movement and around which pivots the trigger rocker 4. Alternatively, however, the latches 3, 4 could be mounted on respective axes offset relative to each other, like the armature and trigger rockers described in the patent application WO 99/64936. In other variants, the latches 3, 4 may not be mounted on physical axes but be guided around the same imaginary axis or two respective imaginary axes by flexible guiding systems.
Dans l'exemple représenté, le ressort-lame 2 est monobloc avec la bascule de détente 4 et est constitué de deux lames élastiques 2a, 2b ayant chacune une extrémité jointe à la bascule de détente 4 et une autre extrémité jointe au bâti du mouvement. Ladite autre extrémité de chaque lame élastique 2a, 2b peut être jointe au bâti du mouvement par l'intermédiaire d'un cadre extérieur (non représenté) entourant le ressort-lame 2 et fixé audit bâti, cadre extérieur qui peut être monobloc avec le ressort-lame 2, comme décrit dans les demandes de brevet WO 2009/1 18310 et CH 705674. Le ressort-lame 2 peut aussi être une pièce rapportée par rapport à la bascule de détente 4 et au cadre extérieur.  In the example shown, the leaf spring 2 is integral with the trigger rocker 4 and consists of two elastic blades 2a, 2b each having an end joined to the trigger rocker 4 and another end joined to the frame of the movement. Said other end of each elastic blade 2a, 2b can be joined to the frame of the movement via an outer frame (not shown) surrounding the leaf spring 2 and fixed to said frame, outer frame which can be integral with the spring -lame 2, as described in patent applications WO 2009/1 18310 and CH 705674. The leaf spring 2 may also be an insert relative to the trigger rocker 4 and the outer frame.
Le ressort-lame 2 présente deux convexités de sens opposés de part et d'autre de son point milieu et peut passer d'un premier état stable à un deuxième état stable en inversant le sens de chacune des deux convexités. A cet effet, le ressort-lame 2 est soit précontraint de manière à travailler en flambage soit préformé pour, à l'état de repos, présenter déjà deux convexités comme décrit dans la demande de brevet internationale WO 2017/032528 de la présente demanderesse. Dans le premier cas, le cadre extérieur est déformable pour permettre le flambage du ressort-lame 2. Dans le deuxième cas, le cadre extérieur est rigide. La bascule d'armage 3 comprend deux bras portant à leurs extrémités deux goupilles 3a, 3b engagées dans des œillets (non représentés) des deux lames élastiques 2a, 2b respectivement. Une configuration inverse est bien entendu possible où les goupilles 3a, 3b seraient portées par les lames élastiques 2a, 2b, respectivement, pour s'engager dans des œillets de la bascule d'armage 3. En outre, d'autres modes de liaison entre la bascule d'armage 3 et les lames élastiques 2a, 2b sont envisageables, par exemple deux goupilles à chaque extrémité de la bascule d'armage 3 pinçant la lame élastique 2a, 2b correspondante. The leaf spring 2 has two convexities of opposite directions on either side of its midpoint and can move from a first stable state to a second stable state by reversing the direction of each of the two convexities. For this purpose, the leaf spring 2 is either prestressed so as to work in buckling or preformed for, in the state of rest, already have two convexities as described in the international patent application WO 2017/032528 of the present applicant. In the first case, the outer frame is deformable to allow buckling of the leaf spring 2. In the second case, the outer frame is rigid. The armature rocker 3 comprises two arms carrying at their ends two pins 3a, 3b engaged in eyelets (not shown) of the two resilient blades 2a, 2b respectively. A reverse configuration is of course possible where the pins 3a, 3b would be carried by the elastic blades 2a, 2b, respectively, to engage in the eyelets of the armature rocker 3. In addition, other modes of connection between the armature rocker 3 and the elastic blades 2a, 2b are conceivable, for example two pins at each end of the armature rocker 3 pinching the corresponding elastic blade 2a, 2b.
La bascule d'armage 3 comprend en outre une partie 9 en forme d'anneau qui entoure l'étoile d'armage 6. La paroi intérieure 10 de cette partie 9 présente des éléments d'armage 1 1 , 12 (cf. figure 2) constitués par des ergots, et est en outre conformée de manière irrégulière pour remplir une fonction de sécurité contre les chocs, c'est-à-dire empêcher une rotation de la bascule d'armage 3 au- delà d'un certain jeu lors d'un choc rotatif ou linéaire reçu par le mouvement d'horlogerie. A cet effet, la paroi intérieure 10 de la partie 9 suit sur sensiblement 360° la trajectoire du sommet de l'une quelconque des dents de l'étoile d'armage 6 dans un repère lié à la bascule d'armage 3 lors de la rotation de l'étoile d'armage 6 et des oscillations de la bascule d'armage 3 qui en résultent, afin de buter contre l'étoile d'armage 6 en cas de choc. De cette manière, le positionnement de la bascule d'armage 3 est garanti selon un faible jeu, prédéfini, et évite ainsi que la bascule d'armage 3 déclenche le basculement du ressort- lame 2 de manière intempestive.  The armature rocker 3 further comprises a ring-shaped portion 9 which surrounds the winding star 6. The inner wall 10 of this part 9 has winding elements 1 1, 12 (see FIG. ) constituted by lugs, and is further irregularly shaped to fulfill a safety function against shocks, that is to say to prevent a rotation of the armature rocker 3 beyond a certain clearance when a rotary or linear shock received by the watch movement. For this purpose, the inner wall 10 of the part 9 follows on substantially 360 ° the trajectory of the vertex of any one of the teeth of the winding star 6 in a reference linked to the armature rocker 3 during the rotation of the winding star 6 and oscillations of the armature rocker 3 which result, to abut against the winding star 6 in case of shock. In this way, the positioning of the armature rocker 3 is guaranteed by a small clearance, predefined, and thus prevents the armature rocker 3 triggers the tilting of the leaf spring 2 inadvertently.
La bascule de détente 4 comprend un bras d'entrée 13 terminé par un bec d'entrée 14 et un bras de sortie 15 terminé par un bec de sortie 16. Ces becs d'entrée et de sortie 14, 16 sont agencés pour coopérer avec les dents 8 de la roue de verrouillage 7, comme cela sera expliqué ci-après. La bascule de détente 4 comprend aussi une baguette 17 se terminant en une fourchette 18 similaire à celle d'une ancre traditionnelle, comprenant une première corne 19 et une deuxième corne 20. La fourchette 18 est agencée pour coopérer avec une cheville de plateau 21 portée par un grand plateau 22 coaxial et solidaire du régulateur du mouvement. Le régulateur (non représenté) oscille autour d'un axe C, est par exemple de type balancier-spiral mais peut aussi être un oscillateur sans axe physique, à lames flexibles. Un dard 23 solidaire de la bascule de détente 4, et qui peut être monobloc avec cette dernière, est susceptible de coopérer avec un petit plateau 24 coaxial et solidaire du régulateur pour empêcher le renversement de la bascule de détente 4 en cas de choc. Des première et deuxième butées de limitation 25, 26 fixes par rapport au bâti du mouvement limitent le mouvement angulaire de la bascule de détente 4. Ces butées de limitation 25, 26 se présentent par exemple sous la forme de goupilles, comme représenté, ou d'étoqueaux. Elles peuvent être monobloc avec le cadre extérieur du ressort- lame 2. The trigger rocker 4 comprises an inlet arm 13 terminated by an inlet spout 14 and an outlet arm 15 terminated by an outlet spout 16. These inlet and outlet spouts 14, 16 are arranged to cooperate with the teeth 8 of the locking wheel 7, as will be explained below. The trigger rocker 4 also comprises a rod 17 ending in a fork 18 similar to that of a traditional anchor, comprising a first horn 19 and a second horn 20. The fork 18 is arranged to cooperate with a plateau pin 21 worn by a large plate 22 coaxial and integral movement regulator. The regulator (not shown) oscillates around an axis C, for example of the spring-balance type but can also be an oscillator without physical axis, with flexible blades. A stinger 23 integral with the trigger rocker 4, and which can be integral with the latter, is likely to cooperate with a small plate 24 coaxial and integral with the regulator to prevent the reversal of the flip flop 4 in case of shock. First and second limiting abutments 25, 26 fixed relative to the frame of the movement limit the angular movement of the trigger rocker 4. These limit stops 25, 26 are for example in the form of pins, as shown, or 'étoqueaux. They can be integral with the outer frame of the leaf spring 2.
L'échappement selon l'invention fonctionne selon des cycles correspondant chacun à une oscillation (deux alternances) du régulateur. Chaque cycle comprend deux demi-cycles. Chaque demi-cycle correspond à une alternance du régulateur et comprend les phases suivantes : armage, verrouillage, détente.  The escapement according to the invention operates according to cycles each corresponding to an oscillation (two alternations) of the regulator. Each cycle comprises two half-cycles. Each half-cycle corresponds to an alternation of the regulator and includes the following phases: arming, locking, relaxation.
La phase d'armage du premier demi-cycle débute lorsqu'une dent 6a de l'étoile d'armage 6 rencontre un premier, 1 1 , des éléments d'armage 1 1 , 12 de la bascule d'armage 3 (cf. figure 1 ). En continuant son déplacement, la dent 6a pousse ce premier élément d'armage 1 1 , ce qui fait pivoter la bascule d'armage 3 autour de son axe B dans le sens indiqué par la flèche F2. Ce mouvement de la bascule d'armage 3 arme le ressort-lame 2 en le faisant passer d'un premier état stable à un état métastable proche d'un état instable. Cette déformation du ressort-lame 2 est imperceptible dans la zone du point milieu, si bien que la bascule de détente 4 reste immobile.  The arming phase of the first half-cycle begins when a tooth 6a of the winding star 6 encounters a first, 1 1, winding elements 1 1, 12 of the armature rocker 3 (cf. figure 1 ). By continuing its movement, the tooth 6a pushes this first armoring element 1 1, which pivots the armature rocker 3 about its axis B in the direction indicated by the arrow F2. This movement of the armature rocker 3 arms the leaf spring 2 by passing it from a first stable state to a metastable state close to an unstable state. This deformation of the leaf spring 2 is imperceptible in the area of the midpoint, so that the trigger rocker 4 remains stationary.
A la fin de l'armage (cf. figure 2) une dent 8a de la roue de verrouillage 7 vient au contact du bec d'entrée 14 de la bascule de détente 4, ce qui, par un phénomène de tirage, plaque la bascule de détente 4 contre la première butée de limitation 25 et bloque le mobile d'échappement 1 et avec lui le rouage de finissage. La phase de verrouillage est ainsi commencée. Durant cette phase de verrouillage, la bascule de détente 4 est positionnée de façon précise par la première butée de limitation 25. Ceci est un avantage par rapport à l'état de la technique (WO 99/64936, WO 2009/1 18310 et CH 705674) où la bascule de détente est positionnée par le taux de flambage du ressort-lame qui applique un couple de rotation à la bascule de détente contre une butée de limitation. Ce principe de l'état de la technique présente le défaut que sous l'action de l'armage du ressort-lame, la bascule de détente peut légèrement se déplacer et perdre le contact avec la butée de limitation. La bascule de détente peut ainsi vibrer lors de chocs ou en raison de la fréquence propre de l'ensemble comprenant la bascule de détente et le ressort-lame. Une telle vibration peut être néfaste car dans certains cas le dard associé à la bascule de détente peut frotter contre le petit plateau et freiner le régulateur. Pour éviter ce genre de vibration, on peut augmenter le taux de flambage mais au prix d'une diminution du rendement. La présente invention, par le tirage exercé sur la bascule de détente 4 par la roue de verrouillage 7, résout ou au moins atténue ce problème. De plus, la zone de verrouillage étant relativement proche de l'axe de rotation B de la bascule de détente 4, le couple de verrouillage est potentiellement plus faible que dans l'état de la technique. At the end of the arming (see Figure 2) a tooth 8a of the locking wheel 7 comes into contact with the inlet nose 14 of the trigger rocker 4, which, by a pulling phenomenon, plate the rocker 4 relaxation against the first limit stop 25 and blocks the mobile escape 1 and with him the finishing gear. The locking phase is thus started. During this locking phase, the trigger rocker 4 is accurately positioned by the first limit stop 25. This is an advantage over the state of the art (WO 99/64936, WO 2009/1 18310 and CH 705674) where the trigger rocker is positioned by the buckling rate of the leaf spring which applies a torque to the trigger rocker against a limit stop. This the principle of the state of the art has the defect that under the action of the armature of the leaf spring, the trigger rocker can move slightly and lose contact with the limit stop. The trigger rocker can thus vibrate during shocks or because of the natural frequency of the assembly comprising the trigger rocker and the leaf spring. Such a vibration can be detrimental because in some cases the stinger associated with the trigger rocker can rub against the small plate and brake the regulator. To avoid this kind of vibration, one can increase the rate of buckling but at the price of a decrease of the yield. The present invention, by the pull exerted on the trigger rocker 4 by the locking wheel 7, solves or at least mitigates this problem. In addition, the locking zone being relatively close to the axis of rotation B of the trigger rocker 4, the locking torque is potentially lower than in the state of the art.
Ces phases d'armage et de verrouillage se produisent alors que le régulateur effectue son arc supplémentaire, c'est-à-dire pivote autour de son axe C sans interaction avec l'échappement. Pendant ces phases, la bascule d'armage 3 est sécurisée en position par l'élément d'armage 1 1 (dans un sens) et par la paroi intérieure 10 (dans les deux sens). Le ressort-lame 2 ne peut donc pas changer d'état intempestivement et la bascule d'armage 3 ne peut pas se déverrouiller intempestivement. A un instant déterminé après le verrouillage du mobile d'échappement 1 , la cheville de plateau 21 percute la face interne de la première corne 19 de la fourchette 18 (cf. figure 3), provoquant un léger pivotement de la bascule de détente 4 dans le sens F2. Ce pivotement cause une déformation du ressort-lame 2 lui faisant dépasser son état instable. Le ressort- lame 2 libère alors l'énergie accumulée pendant l'armage en basculant dans son deuxième état stable, inverse du premier état stable. C'est la phase de détente. Cette brusque déformation du ressort-lame 2 fait pivoter la bascule de détente 4 dans le sens F2. Durant ce mouvement, le bec d'entrée 14 de la bascule de détente 4 quitte la dent 8a de la roue de verrouillage 7, en vainquant la force d'appui exercée sur ledit bec d'entrée 14 sous l'action de l'organe moteur du mouvement, et déverrouille le mobile d'échappement 1 , puis la face interne de la deuxième corne 20 communique une impulsion à la cheville de plateau 21 et donc au régulateur (cf. figure 4). La phase de détente se termine lorsque la bascule de détente 4 arrive en butée contre la deuxième butée de limitation 26 (cf. figure 5) dans le deuxième état stable du ressort-lame 2. These arming and locking phases occur while the regulator performs its extra arc, that is, it pivots about its axis C without interaction with the escapement. During these phases, the armature rocker 3 is secured in position by the armoring element 1 1 (in one direction) and by the inner wall 10 (in both directions). The leaf spring 2 can not change state unexpectedly and the armature rocker 3 can not unlock untimely. At a determined instant after the locking of the escape wheel 1, the plate pin 21 collides with the inner face of the first horn 19 of the fork 18 (see FIG. 3), causing the trigger rocker 4 to pivot slightly in the sense F2. This pivoting causes deformation of the leaf spring 2 causing it to exceed its unstable state. The leaf spring 2 then releases the energy accumulated during the arming by switching to its second stable state, which is the opposite of the first stable state. This is the relaxation phase. This sudden deformation of the leaf spring 2 rotates the trigger rocker 4 in the direction F2. During this movement, the inlet nose 14 of the trigger rocker 4 leaves the tooth 8a of the locking wheel 7, overcoming the force pressing against said input spout 14 under the action of the drive member of the movement, and unlocks the escape wheel 1, then the inner face of the second horn 20 communicates a pulse to the plateau pin 21 and therefore to the regulator (see Figure 4). The expansion phase ends when the trigger rocker 4 comes into abutment against the second limit stop 26 (see Figure 5) in the second stable state of the leaf spring 2.
Après la phase de détente commence le deuxième demi-cycle, avec ses phases d'armage, de verrouillage et de détente se produisant dans le sens opposé à celui du premier demi-cycle. Ainsi, une dent 6b de l'étoile d'armage 6 entre en contact avec un deuxième, 12, des éléments d'armage 1 1 , 12 de la bascule d'armage 3 et le pousse pour faire pivoter la bascule d'armage 3 dans un sens F3 opposé au sens F2 (cf. figure 6). Ce mouvement de la bascule d'armage 3 arme le ressort-lame 2 pour le faire passer de son deuxième état stable à un état métastable proche d'un état instable. Ensuite, une dent 8b de la roue de verrouillage 7 bute contre le bec de sortie 16 de la bascule de détente 4, ce qui plaque la bascule de détente 4 contre la deuxième butée de limitation 26 et bloque le mobile d'échappement 1 et avec lui le rouage de finissage (cf. figure 7). Puis, la cheville de plateau 21 percute la face interne de la deuxième corne 20 de la fourchette 18 (cf. figure 8), provoquant la détente du ressort-lame 2, le déverrouillage du mobile d'échappement 1 et la communication d'une impulsion à la cheville de plateau 21 . A la fin de ce deuxième demi-cycle, le ressort-lame 2 retrouve son premier état stable, illustré à la figure 1 .  After the relaxation phase begins the second half cycle, with its phases of arming, locking and expansion occurring in the opposite direction to that of the first half cycle. Thus, a tooth 6b of the winding star 6 comes into contact with a second, 12, of the armoring elements 1 1, 12 of the armature rocker 3 and pushes it to rotate the armature rocker 3 in a direction F3 opposed to the direction F2 (see Figure 6). This movement of the armature rocker 3 arms the leaf spring 2 to move it from its second stable state to a metastable state close to an unstable state. Then, a tooth 8b of the locking wheel 7 abuts against the outlet nose 16 of the trigger rocker 4, which plates the trigger rocker 4 against the second limit stop 26 and blocks the escapement wheel 1 and with the finishing gear (see Figure 7). Then, the plate pin 21 collides with the inner face of the second horn 20 of the fork 18 (see FIG. 8), causing the spring leaf 2 to relax, the unlocking of the escapement wheel 1 and the communication of a impulse at the plateau ankle 21. At the end of this second half-cycle, the leaf spring 2 returns to its first stable state, illustrated in FIG.
Comme il ressort de la description ci-dessus, le verrouillage/déverrouillage du mobile d'échappement 1 dans la présente invention est effectué directement par la bascule de détente 4 au moyen des becs d'entrée et de sortie 14, 16, donc de manière statique, plutôt que par la bascule d'armage commandée par le ressort-lame lui-même commandé par la bascule de détente comme dans l'état de la technique. Dans la présente invention le ressort-lame 2 n'est utilisé que pour l'impulsion au régulateur. Cela permet de déverrouiller le mobile d'échappement 1 suffisamment tôt, c'est-à-dire avant que le régulateur n'atteigne sa position d'équilibre, pour laisser le ressort-lame 2 libre de fournir son impulsion au moment opportun, où le régulateur est proche de sa position d'équilibre. L'instant du début de l'impulsion peut dès lors être précis, ce qui favorise l'isochronisme du régulateur. As is apparent from the description above, the locking / unlocking of the mobile escapement 1 in the present invention is carried out directly by the trigger rocker 4 by means of the inlet and outlet nozzles 14, 16, so static, rather than by the armature rocker controlled by the leaf spring itself controlled by the trigger rocker as in the state of the art. In the present invention the leaf spring 2 is only used for the pulse to the regulator. This allows to unlock the mobile escape 1 early enough, that is to say before the regulator reaches its equilibrium position, to let the leaf spring 2 free to provide its momentum when the regulator is close to its equilibrium position . The moment of the beginning of the pulse can therefore be precise, which favors the isochronism of the regulator.
De plus, l'utilisation d'un seul mobile d'échappement 1 comprenant les éléments d'armage 1 1 , 12 supprime le besoin d'indexer deux mobiles d'échappement l'un par rapport à l'autre, donc facilite le montage, et réduit l'encombrement et l'inertie. En outre, la coopération entre les dents de l'étoile d'armage 6 et les éléments d'armage 1 1 , 12 ne génère pas ou peu de frottements, contrairement aux cames d'armage du mécanisme selon les documents WO 99/64936, WO 2009/1 18310 et CH 705674, qui glissent sur des goupilles portées par la bascule d'armage. En effet, la coopération entre l'étoile d'armage 6 et les éléments d'armage 1 1 , 12 est similaire à celle d'un engrenage, l'étoile d'armage 6 exerçant sur la paroi intérieure 10 un effort tangentiel.  In addition, the use of a single mobile escape 1 comprising the elements 1 1, 12 eliminates the need to index two mobile exhaust relative to each other, so facilitates assembly , and reduces clutter and inertia. In addition, the cooperation between the teeth of the winding star 6 and the winding elements 1 1, 12 generates little or no friction, unlike the winding cams of the mechanism according to WO 99/64936, WO 2009/1 18310 and CH 705674, which slide on pins carried by the rocker arming. Indeed, the cooperation between the winding star 6 and the winding elements 1 1, 12 is similar to that of a gear, the winding star 6 exerting on the inner wall 10 a tangential force.
La présente invention a été décrite ci-dessus à titre d'exemple uniquement. Il va de soi que des modifications pourraient être faites sans sortir de l'objet revendiqué. Par exemple, l'étoile d'armage 6 et la roue de verrouillage 7 pourraient former une seule pièce sur un seul niveau. Dans ce cas, les dents de l'étoile 6 assureraient dans certaines positions l'armage et dans d'autres positions le verrouillage. L'organe élastique bistable que constitue le ressort-lame 2 pourrait être formé d'une seule lame élastique 2a ou 2b et la bascule d'armage 3 pourrait comprendre un seul bras coopérant par son extrémité avec la lame élastique. Dans des variantes, l'organe élastique bistable pourrait comprendre plusieurs ressorts-lames comprenant chacun une ou plusieurs lames élastiques. Selon une autre modification, le mobile d'échappement 1 pourrait être situé de l'autre côté du régulateur voire être coaxial audit régulateur (c'est-à-dire à l'axe C).  The present invention has been described above by way of example only. It goes without saying that modifications could be made without departing from the claimed object. For example, the winding star 6 and the locking wheel 7 could form a single piece on a single level. In this case, the teeth of the star 6 would ensure in certain positions the arming and in other positions the locking. The bistable elastic member that constitutes the leaf spring 2 could be formed of a single elastic blade 2a or 2b and the armature rocker 3 could comprise a single arm cooperating at its end with the elastic blade. In variants, the bistable elastic member could comprise a plurality of leaf springs each comprising one or more elastic blades. According to another modification, the mobile escape 1 could be located on the other side of the regulator or be coaxial with said regulator (that is to say, the C axis).

Claims

REVENDICATIONS
1 . Echappement d'horlogerie comprenant un organe élastique bistable (2), une bascule d'armage (3) agencée pour armer l'organe élastique bistable (2) pendant des phases d'armage, et une bascule de détente (4) agencée pour être entraînée par une détente de l'organe élastique bistable (2) après chaque phase d'armage afin de communiquer une impulsion à un régulateur, caractérisé en ce qu'il comprend un unique mobile d'échappement (1 ) pour entraîner la bascule d'armage (3) pendant les phases d'armage, le mobile d'échappement (1 ) comprenant un organe d'armage (6) agencé pour coopérer avec des éléments d'armage (1 1 , 12) de la bascule d'armage (3), à la manière d'un engrenage, pour faire pivoter la bascule d'armage (3) alternativement dans des sens opposés. 1. Clock escapement comprising a bistable elastic member (2), an armature rocker (3) arranged to arm the bistable elastic member (2) during winding phases, and a trigger rocker (4) arranged to be driven by an expansion of the bistable elastic member (2) after each arming phase to communicate a pulse to a regulator, characterized in that it comprises a single exhaust mobile (1) for driving the rocker winding (3) during the winding phases, the escapement wheel (1) comprising a winding member (6) arranged to cooperate with winding elements (1 1, 12) of the winding lever ( 3), in the manner of a gear, for pivoting the armature rocker (3) alternately in opposite directions.
2. Echappement d'horlogerie selon la revendication 1 , caractérisé en ce que les éléments d'armage (1 1 , 12) sont définis par une paroi intérieure (10) d'une partie (9) de la bascule d'armage (3) qui entoure l'organe d'armage (6). 2. Clock escapement according to claim 1, characterized in that the arming elements (1 1, 12) are defined by an inner wall (10) of a portion (9) of the armature rocker (3). ) which surrounds the armoring member (6).
3. Echappement d'horlogerie selon la revendication 2, caractérisé en ce que ladite paroi intérieure (10) suit sur sensiblement 360° la trajectoire du sommet d'une dent de l'organe d'armage (6) dans un repère lié à la bascule d'armage (3) lors de la rotation de l'organe d'armage (6), afin de buter contre l'organe d'armage (6) en cas de choc et sécuriser ainsi la position de la bascule d'armage (3). 3. Exhaust timepiece according to claim 2, characterized in that said inner wall (10) follows over substantially 360 ° the trajectory of the crown of a tooth of the armature member (6) in a reference frame related to the armature rocker (3) during the rotation of the armoring member (6), in order to abut against the armoring member (6) in the event of an impact and thus secure the position of the armature rocker (3).
4. Echappement d'horlogerie selon l'une quelconque des revendications 1 à 3, caractérisé en ce que les éléments d'armage (1 1 , 12) sont des ergots. 4. Exhaust timepiece according to any one of claims 1 to 3, characterized in that the winding elements (1 1, 12) are lugs.
5. Echappement d'horlogerie selon l'une quelconque des revendications 1 à 4, caractérisé en ce que l'organe d'armage (6) est une étoile. 5. Exhaust timepiece according to any one of claims 1 to 4, characterized in that the armoring member (6) is a star.
6. Echappement d'horlogerie selon l'une quelconque des revendications 1 à 5, caractérisé en ce que la bascule de détente (4) est agencée pour coopérer avec l'organe élastique bistable (2) dans la zone d'un point milieu (B) de l'organe élastique bistable (2) et la bascule d'armage (3) est agencée pour coopérer avec l'organe élastique bistable (2) de part et d'autre (3a, 3b) de ladite zone. 6. Clock escapement according to any one of claims 1 to 5, characterized in that the trigger rocker (4) is arranged to cooperate with the bistable elastic member (2) in the area of a midpoint ( B) of the bistable elastic member (2) and the armature rocker (3) is arranged to cooperate with the bistable elastic member (2) on both sides (3a, 3b) of said zone.
EP17733910.8A 2016-06-27 2017-06-20 Clock escapement Active EP3475765B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP16176386 2016-06-27
PCT/IB2017/053668 WO2018002773A1 (en) 2016-06-27 2017-06-20 Timepiece escapement

Publications (2)

Publication Number Publication Date
EP3475765A1 true EP3475765A1 (en) 2019-05-01
EP3475765B1 EP3475765B1 (en) 2020-07-29

Family

ID=56263583

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17733910.8A Active EP3475765B1 (en) 2016-06-27 2017-06-20 Clock escapement

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EP (1) EP3475765B1 (en)
WO (1) WO2018002773A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3599514B1 (en) 2018-07-25 2023-06-07 Sowind S.A. Exhaust mechanism having bistable and monostable springs

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1084459A1 (en) 1998-06-08 2001-03-21 Manufacture des Montres Rolex S.A. Method for transmitting bursts of mechanical energy from a power source to an oscillating regulator
EP1967919B1 (en) * 2007-03-09 2009-06-03 ETA SA Manufacture Horlogère Suisse Exhaust with tangential impulses
EP2105806B1 (en) 2008-03-27 2013-11-13 Sowind S.A. Escapement mechanism
CH703333B1 (en) * 2010-06-22 2015-07-15 Bruno Fragnière Exhaust anchor.
CH705674B1 (en) 2011-10-27 2016-11-30 Sowind S A escape mechanism.
WO2017032528A1 (en) 2015-08-21 2017-03-02 Patek Philippe Sa Geneve Bistable mechanical device, notably for horology

Also Published As

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WO2018002773A1 (en) 2018-01-04
EP3475765B1 (en) 2020-07-29

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