EP3627242B1 - Optimised magneto-mechanical timepiece escapement mechanism - Google Patents
Optimised magneto-mechanical timepiece escapement mechanism Download PDFInfo
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- EP3627242B1 EP3627242B1 EP18195530.3A EP18195530A EP3627242B1 EP 3627242 B1 EP3627242 B1 EP 3627242B1 EP 18195530 A EP18195530 A EP 18195530A EP 3627242 B1 EP3627242 B1 EP 3627242B1
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- magnetic
- pallet
- oscillator
- wheel
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Classifications
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- G—PHYSICS
- G04—HOROLOGY
- G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
- G04C5/00—Electric or magnetic means for converting oscillatory to rotary motion in time-pieces, i.e. electric or magnetic escapements
- G04C5/005—Magnetic or electromagnetic means
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- G—PHYSICS
- G04—HOROLOGY
- G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
- G04B15/00—Escapements
- G04B15/02—Escapements permanently in contact with the regulating mechanism
- G04B15/04—Cylinder escapements
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- G—PHYSICS
- G04—HOROLOGY
- G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
- G04B17/00—Mechanisms for stabilising frequency
- G04B17/04—Oscillators acting by spring tension
- G04B17/045—Oscillators acting by spring tension with oscillating blade springs
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- G—PHYSICS
- G04—HOROLOGY
- G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
- G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
- G04C3/04—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means wherein movement is regulated by a balance
Definitions
- the invention relates to a clockwork oscillator, comprising at least one resonator, with an inertial mass returned by elastic return means relative to a fixed structure, said resonator oscillating about an axis of oscillation, said inertial mass bearing an input pallet and an output pallet, said oscillator comprising an escape mechanism comprising an escape wheel arranged to rotate about an axis of rotation and comprising end teeth, each arranged to cooperate with said pallet input or with said output pallet for maintaining the oscillation of said resonator.
- the invention also relates to a timepiece movement comprising at least one such oscillator.
- the invention also relates to a watch comprising at least one such movement and / or at least one such oscillator.
- the invention relates to the field of clockwork oscillator mechanisms.
- Magnetic exhausts without friction are well suited to maintain this type of resonator, as readable in patent applications EP141999882.3 on behalf of THE SWATCH GROUP RESEARCH & DEVELOPMENT, or US9715217 in the name of DI DOMENICO, because they allow to obtain high returns.
- the addition of a mechanical anti-release system guarantees robustness when worn, as in the patent application EP16195405.2 on behalf of THE SWATCH GROUP RESEARCH & DEVELOPMENT, but it makes self-start difficult.
- the patent EP2889704B1 in the name of NIVAROX-FAR describes an escape mechanism whose escape wheel, subjected to a pivoting torque of moment less than a nominal moment, comprises actuators regularly spaced on its periphery, each arranged to cooperate directly with at least a first track of a mobile regulator, in particular a cylindrical track.
- Each actuator comprises first magnetic stopping means forming a barrier and arranged to cooperate with this first track which is magnetized or ferromagnetic, to exert on the first track a torque greater than the nominal moment.
- Each actuator also comprises second stop means arranged to constitute a stroke limiting stopper, arranged to constitute an autonomous escape mechanism with at least one complementary first stop surface that the mobile regulator comprises.
- the invention proposes to provide a robust and self-starting exhaust mechanism for maintaining a high-frequency resonator with a high quality factor.
- the invention relates to a clockwork oscillator mechanism according to claim 1.
- Other preferred embodiments are defined in claims 2 to 16.
- the invention also relates, according to claim 17, to a timepiece movement comprising at least one such oscillator.
- the invention also relates, according to claim 18, to a watch comprising at least one such movement and / or at least one such oscillator.
- the invention proposes to provide a robust and self-starting escapement mechanism for maintaining a high-frequency, high-quality factor resonator, with anti-stall properties.
- the invention is a practice of the magneto-mechanical escapement, such as that described in the patent application EP2894522 in the name of NIVAROX-FAR, which combines the advantages of high efficiency, great robustness and self-starting.
- the invention adapts, with a markedly improved efficiency, the principle of mechanical cylinder exhausts, which have the advantage of ensuring safety in the event of excessive torque, in particular during an impact, but the high level of friction significantly affects the performance of the exhaust.
- the improvement in efficiency results from the elimination of contact and friction in a cylinder escapement, by the placement of magnets, or electrets, or the like, which, judiciously placed, form a magnetic or electrostatic repulsion, which eliminates friction and therefore the main defect of this mechanical cylinder escapement.
- Magnets, or the like, placed on the escape wheel act as a contactless stopper. Mechanical stops are added to prevent any runaway of the escape wheel in the event of an impact.
- the invention is here more particularly described in the magnetic alternative. Those skilled in the art will find in the prior art cited above the means of its adaptation to an electrostatic version, or even a mixed magnetic-electrostatic version.
- the complete oscillator 300 comprises at least one resonator 100, in particular but not limited to a resonator with at least one inertial mass 1, in particular a balance, suspended directly or indirectly from a fixed structure 3, which is intended to be fixed to a plate or similar.
- This at least one inertial mass 1 is recalled by elastic return means.
- these elastic return means comprise flexible blades 2, as can be seen on the figures 1 and 2 , and this resonator 100 is maintained by a magneto-mechanical exhaust mechanism 200.
- these elastic return means may include at least one spiral spring, or the like.
- At least one inertial mass 1 carries an entry pallet PE and an exit pallet PS.
- the oscillator 300 comprising an escape mechanism 200.
- the escape mechanism 200 is an intermittent operating mechanism, and conventionally comprises at least one escape wheel 20, arranged to rotate about an axis of rotation OE, and which comprises arms 21 provided with mechanical end teeth 22, arranged to interact alternately with the inlet PE and outlet PS paddles. Each of these teeth 22 is arranged to cooperate with the input pallet PE or with the output pallet PS for maintaining the oscillation of the resonator 100.
- this escape mechanism 200 is magneto-mechanical.
- the escape wheel 20 comprises at least one magnet 23 at the end of each tooth 22.
- These teeth 22 are arranged to rest on a mechanical pallet 16, which each input PE or PS output pallet comprises during the arc. free of the resonator 100.
- the input pallet PE comprises a first magnetic arrangement 30,
- the output pallet PS comprises a second magnetic arrangement 30.
- this first magnetic arrangement 30 and this second magnetic arrangement 30 each comprise an annular sector, centered on the axis of oscillation OR of the resonator 100, and defining a first magnetic barrier zone Z1.
- This first magnetic barrier zone Z1 extends above and / or below the mechanical pallet 16, with reference to the direction of the axis of oscillation OR, over the entire length of this mechanical pallet suitable for use. bearing on the teeth 22 during the free arc, so as to constitute a magnetic cylinder escape mechanism.
- such an inertial mass 1 comprises a balance 11, in particular made of titanium alloy, comprising adjustment weights 101.
- This inertial mass 1 is integral with two plates 12, 13, made of silicon, or of silicon and silicon dioxide, or the like, each comprising a flexible blade 2.
- the two flexible blades 2 shown here intersect in projection substantially at the level of the axis of oscillation OR of the inertial mass 1.
- the ends of the two plates, opposite to those fixed to the balance 11, constitute a single mass 4, or two distinct masses 4, each suspended by transverse flexible blades 7 and / or at least one rigid beam 6 to an intermediate body 5, itself suspended from the structure fixed 3 by longitudinal flexible blades 8 and / or at least one rigid beam 9.
- This particular arrangement constitutes an anti-shock table, effective for protecting the flexible pivot formed by the flexible blades ibles 2.
- Such anti-shock devices intended to protect the blades of the resonator are in particular described in the patent applications. CH00518 / 18 on behalf of ETA and CH00540 / 18 on behalf of THE SWATCH GROUP RESEARCH & DEVELOPMENT.
- such devices include such translation tables, allowing the inertial mass 1 of the resonator 100, in particular a balance 11, to be able to move in the event of an impact, and stops centered on the axis of rotation of this inertial mass, in order to retain it without acting on the pivot blades.
- stops are not visible in the figures, and may consist of pins fixed to a plate or to a bridge, one being an upper pin cooperating with play with an upper bore 18 of the inertial mass 1, and limiting its displacement in the event of an impact, and the other being a lower pin cooperating with play with a lower bore 19 of the inertial mass 1, and limiting its displacement in the event of an impact.
- this bore 19 passes through both an upper flange 15 and a lower flange 17, which surround a mechanical pallet 16 integral with the inertial mass 1.
- the resonator 100 comprises a stopper with an input paddle PE, and an output paddle PS, each capable, during the oscillation of the resonator 100, to cooperate with the escape wheel 20.
- These input paddles PE and output PS may be separate, or form a single unit, each is arranged to be fixed integral with the inertial mass 1, and the distal end of each pallet PE, PS is arranged to cooperate with the teeth 22 of the wheel 20
- Each pallet PE, PS comprises a mechanical pallet 16 provided for mechanical contact with the teeth 22, and this mechanical pallet 16 advantageously, but not necessarily, ends in an impulse plane at the distal end of the pallet concerned, on the escape wheel side 20.
- At least one escape wheel 20 comprises at least one magnet 23 at the end of each tooth 22.
- the oscillator 300 comprises a first magnetic arrangement 30 for the input pallet PE and a second magnetic arrangement 30 for the PS output pallet, and which are not necessarily identical, as we will see later.
- Each magnetic arrangement 30 is arranged to be attached to a pallet, or else forms an integral part of a pallet, at least at an upper flange 15 and / or a lower flange 17, flanking the mechanical pallet 16, and disposed respectively above or below the escape wheel 20; these arrangements above and below are understood with reference to the direction of the axis of oscillation OR of the resonator 100, and of the axis of rotation OE of the escape wheel 20, which is parallel to it.
- an entry pallet PE or an exit pallet PS comprises a mechanical pallet 16, arranged to cooperate with the teeth 22 of the wheel 20, and a magnetic arrangement 30, the magnetic field effect of which is superimposed on the teeth. potential mechanical interaction surfaces of the mechanical pallet 16.
- This magnetic arrangement 30 can be produced at different surfaces, in particular the surfaces of the mechanical pallet 16, more particularly at the edge or beyond the zone of mechanical interaction with it. the teeth 22 of the wheel 20.
- at least one such magnetic arrangement 30 is implanted under an upper flange 15 and / or on a lower flange 17 of one of the inlet PE or outlet PS pallets. More particularly, at least one such magnetic arrangement 30 is installed under an upper flange 15 and on a lower flange 17 of one of the inlet PE or outlet PS pallets. More particularly still, such a magnetic arrangement 30 is implanted under an upper flange 15 and on a lower flange 17 of each of the input PE and output PS pallets.
- the resonator 100 is equipped with input PE and output PS vanes comprising substantially tubular mechanical vanes 16, and to which magnets have been added above and below, as can be seen on the figures 3 and 4 , to constitute these magnetic arrangements 30.
- all or part of the magnets can be replaced by at least one continuous or pixelated magnetized surface.
- the magnets 23 of the escape wheel 20 interact in repulsion with the magnets carried by the resonator which are arranged on at least one level, and more particularly on two levels, above and below the wheel 20 according to the diagram of the figure 4 .
- the escape wheel 20 begins to rotate in the direction of the arrow, under the effect of the maintenance torque, and it transmits its impulse by magnetic repulsion to the output pallet PS located on the right-hand side of the figure.
- a mechanical contact, of shock type, between the escape wheel 20 and the output pallet PS makes it possible to damp the rebounds, as can be seen in figure 8 .
- This shock is useful, but not essential for the proper functioning of the exhaust. Indeed, one can achieve a similar exhaust in which the shock does not take place.
- the advantage of a small controlled shock, like this one is to allow the dissipation of part of the energy, and to limit the recoil of the escape wheel 20. Note also that this shock has The advantage of allowing an acoustic measurement of the rate, since, in normal operation, it is then the only audible mechanical contact during operation of the escapement.
- Another advantage of limiting the rearward movement of the wheel is the possibility of increasing the number of teeth of the escape wheel 20, for the same size.
- the lowest point to the left of the trajectory T, on the figure 17 corresponds to the relative position of the figure 13 where the magnet 23 traverses the ascending curve curved to the right, before arriving at an extremum which corresponds to the shock of the figure 14 ;
- the upward inflection to the left corresponds to the decline of the figure 15
- the ascending trajectory, centered, like the vane itself, and like its mechanical vane 16, on the OR oscillation axis of the resonator 10 corresponds to the free arc without friction of the figure 16 , and this free arc can in particular be longer than that illustrated in the figure, the high position corresponding to the figure 5 , before the descending return with clearance on the right on the PE inlet pallet as in figure 6 .
- the trajectory at the level of the output pallet PS is of course similar, the figure 17 shows a magnet 23 in repulsive cooperation with a magnetic pad 32, which is included in the magnetic arrangement 30, to give it an impulse.
- the magnetic arrangement 30 necessarily comprises a magnetic barrier 31, substantially concentric with the pallet PE or PS, and its mechanical pallet 16, around the axis of oscillation OR of the resonator 10.
- Each such magnetic barrier 31, in conjunction with a magnet 23 of the escape wheel 20, makes it possible to avoid any contact, and therefore any friction, in normal operation, between the tooth 22 and the PE or PS pallet concerned.
- mechanical contact can occur in the event of an impact, during a fall of the watch for example, between on the one hand the mechanical pallet 16 of the PE or PS pallet and on the other hand a tooth 22, which together ensure the safety stop function.
- the first magnetic barrier zone Z1 is essential, and its function is to push back the teeth 22 of the escape wheel 20, and thus makes it possible to eliminate the mechanical contact so that the free arc takes place without friction.
- This first magnetic barrier zone Z1 can be more or less intense but it must follow an arc of a circle centered on the axis of oscillation OR of the resonator 10. It is possible to increase the intensity of the barrier if one wishes to avoid the mechanical shock between the teeth of the escape wheel 20 and the mechanical pallets 16 of the PE and PS pallets. Or conversely, it is possible to reduce the intensity of the barrier, if it is desired to minimize the retreat of the escape wheel 20 after the impact.
- a mechanism comprising only this magnetic barrier 31 is an exhaust variant with a magnetic cylinder, which represents an improvement of the patent.
- the magnetic pad 32 of the second self-starting improvement zone Z2 is optional. It is advantageously added to reduce the friction between the escape wheel 20 and the end of the mechanical pallet 16 of the PE or PS pallet at the time of starting thanks to the magnetic repulsion. This significantly improves auto-start.
- the length of the magnetic pad 32 as well as its shape is adjusted to optimize self-starting.
- This magnetic pad 32 also has another effect. When the magnet of the escape wheel 20 passes close to the magnetic pad, there is magnetic repulsion, which transmits a pulse to the resonator 100 and significantly improves efficiency.
- the magnetic pad 32 comprises at least one magnet, and extends substantially perpendicularly to the distal end of the magnetic barrier 31 closest to the escape wheel 20, and on the entry side. in cooperation between a magnet 23 and the magnetic arrangement 30 of the concerned PE or PS pallet, forming with the magnetic barrier 31 an inverted capital L.
- This magnetic pad 32 is not necessarily straight, it can also be slightly curved.
- it may include, at its distal end opposite to the magnetic barrier 31, a magnetic lug, on the side opposite to the escape wheel, and extending the zone where the pulses occur. More particularly, this magnetic lug is located at the distal end according to the direction D2- as regards the entry pallet PE, and at the distal end according to the direction D4- with regard to the output pallet PS. More particularly still, this magnetic lug extends in direction D1- as regards the entry pallet PE, and in direction D3- as regards the outlet pallet PS. In another variant not shown, the magnetic pad 32 extends in the direction D2 +, respectively D4 +.
- the second zone Z2 for improving the self-start is not necessarily identical to the zone where the pulses occur, which means that the pulse can be adjusted without affecting the self-start.
- the figure 18 shows that the magnet 23 of the wheel 20 interacts twice with the magnetic pad 32: first of all, when the magnet 23 passes into the zone of the first pulse ZP, it pushes back this magnetic pad 32, and thus transmits a first pulse to the resonator 100; then, during the passage of the magnet 23 in the release zone and of the second pulse ZD, the magnetic pad 32 constitutes a sort of neck to pass, due to the repulsion, and this is the high speed of the magnet 23 on its trajectory T which allows it to easily cross this pass. Immediately after the passage of the neck, the wheel 20 starts to turn, and a second pulse is then transmitted to the resonator 100.
- the repulsion between the magnet 23 and the magnetic pad 32 supplies the first pulse to the resonator 100; the second impulse is transmitted after the passage of the neck in the clearance zone and second impulse ZD, in a similar way to what occurs on the entry pallet.
- the magnetic pad 32 is completed by a magnetic heel 33, which is substantially in its alignment, and on the opposite side with respect to the magnetic barrier, that is to say in the direction D2 + at the level of the entry pallet PE, and in the direction D4 + at the level of the exit pallet PS.
- This magnetic bead 33 allows the force of the axis to be separated, and tends to drive the magnet 23 out of the escape wheel 20 tangentially, and makes it possible to combat the frictional force, it allows the repulsion to last until the end of the pallet.
- This magnetic heel 33 is still useful at the level of the overall kinematics, because the magnetic heel 33 located on the output pallet PS allows the following arm 21 of the escape wheel 20 to be sufficiently engaged in cooperation with the magnetic arrangement 30. of the PE entry pallet, so as not to be subjected to the threshold to be overcome during its passage when entering this zone.
- the total length of the magnetic shoe 32 and of the magnetic heel 33 which extends it is close to the half-pitch of the ends of the teeth 22 on the circle CE which is the envelope of the path of the escape wheel 20.
- the magnetic bead 33 is arranged by rays increasing from the axis of rotation OE of the wheel 20 away from said magnetic (32).
- the magnetic heel 33 is made in a staircase with decreasing steps, as can be seen on the figures 18 and 20 .
- the total curvilinear length of the magnetic shoe 32 is greater than that of the magnetic heel 33, in order to give a first impulse: at the entry, the whole of the shoe and of the heel extends more in the direction D2- than in the direction D2 +, and at the exit the whole of the shoe and the heel extends more in the direction D4- than in the direction D4 +.
- the addition of such a magnetic pad 32 to the magnetic barrier 31 is advantageous for self-starting: if this magnetic pad does not exist, the escape wheel can, in certain configurations, come into mechanical abutment on the 'distal end of the mechanical pallet 16 of the PE or PS pallet, and the low torque available at the level of the escape wheel 20 does not make it possible to overcome the friction.
- the advantage of the magnetic pad 32 is therefore to reduce the frictional force at the end of the mechanical pallet 16 during start-up, which allows normal self-starting.
- the quantity of magnet to be put in order to optimize the pulse therefore depends on the resonator 100 used and on its quality factor. If the quality factor is low, more magnets are added. If the quality factor is high, less is used.
- the shape of the mechanical pallet 16 can be optimized to minimize losses and also to promote self-starting.
- the end of the vanes impulse planes
- the mechanical vanes 16 of the vanes it is not it is necessary for the mechanical vanes 16 of the vanes to be arcs of a circle centered on the axis of rotation of the resonator. If we observe the figures 18 to 21 it can be seen that in the mechanical contact zone ZC the mechanical pallet 16 of the pallet has been modified, according to a profile 301, to minimize the effect of the impact on the balance. This is to adjust the angle of this area so that the contact force support passes through the center of rotation.
- This profile 301 can be an inclined plane, or an evolving hollow profile as in the figures, and makes it possible to deflect the force exerted on the pallet downwards according to the representation of the figures, so that the resultant of the two forces which are this force , and the upward tangential frictional force on the vane passes through the axis of oscillation OR of the resonator 10.
- the magnetic barrier 31 may have a similar variation in magnetization.
- small magnets are added in the third isochronism correction zone Z3, in order to adjust the anisochronism of the resonator 100 caused by the escape mechanism 100.
- L The objective is for this induced anisochronism to be compensated for by that of the resonator 100 so that the total oscillator 300 is perfectly isochronous.
- the quantity and position of these small magnets is adjusted iteratively until the desired effect is obtained.
- it can also be a simple ferromagnetic surface, weakly cooperating with the magnets 23 of the teeth 22 of the escape wheel 20.
- This third zone Z3 extends, from the point of view of the teeth 22 of the wheel.
- this third zone Z3 extends, with respect to the axis of oscillation OR of the resonator, beyond the magnetic barrier zone Z1, and, with respect to the axis of rotation OE of the wheel d exhaust 20, beyond the distal end of the vane; when the magnetic arrangement 30 comprises a magnetic pad 32 defining a second zone Z2, and an associated pulse zone, the third zone Z3 is located, with respect to the axis of rotation OE of the escape wheel 20, at the -beyond the second zone Z2.
- the mechanical paddles 16 carried by the resonator 100 enter the teeth of the escape wheel 20 when the resonator 100 is in its rest position.
- the values of the penetrations p1 and p2 are represented on the figure 22 . In this figure we see the circle CE which is the envelope of the path of the escape wheel 20.
- the penetrations p1 and p2, measured from the radials coming from the axis of oscillation OR of the resonator 10, are necessary for safety reasons, because they prevent any rotation of the escape wheel 20 in complete unloading of the barrel.
- a penetration value of 40 micrometers makes it possible to ensure this safety function, while absorbing errors or simply the effect of manufacturing tolerances on the center distance between the axis of oscillation OR of the resonator 10 and the 'exhaust wheel OE axle 20.
- the torque applied to the escape wheel 20 must be sufficient to push the resonator 100 out of its rest position so that the teeth can pass. This can make self-starting difficult when the resonator is mounted on a flexible guide. Adding the magnetic pads 32 to the paddles greatly improves self-starting for two reasons. First of all, the magnetic repulsion has the effect of reducing the friction between the teeth and the end of the paddles. On the other hand, this repulsion shifts the rest position of the resonator to the appropriate side so that the tooth can pass. The result is that the oscillator is self-starting over the majority of the useful torque range.
- the effect of the magnets of the third isochronism correction zone Z3 is to produce a small disturbance of the inertial mass 1, so as to adjust the anisochronism of the escapement, so that there is compensation with the anisochronism of the resonator 100.
- This anisochronism correction is not essential but may prove to be advantageous depending on the type of resonator used.
- FIG. 23 Another variant is presented at figure 23 in which there are only two small growths 341 on the magnetic barrier 31, in the third zone Z3, which are sufficient to produce the disturbance necessary for the correction of anisochronism.
- the anisochronism corrector can be placed only on the magnetic paddles of the upper flange 15, or then only on the magnetic paddles of the lower flange 17.
- the anisochronism is adjustable, by varying the distance between the magnets of the third upper zone Z3 and the magnets of the third lower zone Z3, which has the effect of varying the intensity of the magnetic field. seen by the magnets 23 of the escape wheel 20 when they are in the third zone Z3.
- the third zone Z3 contains a sacrificial excess of iron or of magnets, this sacrificial excess is intended to be, at least in part, selectively removed according to the result of a measurement of the anisochronism of the oscillator 300 complete, for the reestablishment of its isochronism.
- the magnetic arrangement 30 is made with a surplus of magnet pixels in the third zone Z3, the surplus magnets can then be removed by selective laser ablation after having carried out an anisochronism measurement.
- the interaction takes place in attraction rather than repulsion.
- the invention also relates to a timepiece movement 500 comprising at least one such oscillator 300.
- the invention also relates to a watch 1000 comprising at least one such movement 500 and / or at least one such oscillator 300.
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Description
L'invention concerne un oscillateur d'horlogerie, comportant au moins un résonateur, avec une masse inertielle rappelée par des moyens de rappel élastique par rapport à une structure fixe, ledit résonateur oscillant autour d'un axe d'oscillation, ladite masse inertielle portant une palette d'entrée et une palette de sortie, ledit oscillateur comportant un mécanisme d'échappement comportant une roue d'échappement agencée pour tourner autour d'un axe de rotation et comportant des dents d'extrémité, chacune agencée pour coopérer avec ladite palette d'entrée ou avec ladite palette de sortie pour l'entretien de l'oscillation dudit résonateur.The invention relates to a clockwork oscillator, comprising at least one resonator, with an inertial mass returned by elastic return means relative to a fixed structure, said resonator oscillating about an axis of oscillation, said inertial mass bearing an input pallet and an output pallet, said oscillator comprising an escape mechanism comprising an escape wheel arranged to rotate about an axis of rotation and comprising end teeth, each arranged to cooperate with said pallet input or with said output pallet for maintaining the oscillation of said resonator.
L'invention concerne encore un mouvement d'horlogerie comportant au moins un tel oscillateur.The invention also relates to a timepiece movement comprising at least one such oscillator.
L'invention concerne encore une montre comportant au moins un tel mouvement et/ou au moins un tel oscillateur.The invention also relates to a watch comprising at least one such movement and / or at least one such oscillator.
L'invention concerne le domaine des mécanismes oscillateurs d'horlogerie.The invention relates to the field of clockwork oscillator mechanisms.
L'utilisation de guidages flexibles permet de réaliser des résonateurs à haute fréquence et à haut facteur de qualité, comme par exemple dans les demandes de brevets
Des échappements magnétiques sans frottement sont bien adaptés pour entretenir ce type de résonateur, tel que lisible dans les demandes de brevet
Le brevet
Une proposition générale de combiner un échappement magnétique, à haut rendement, et un échappement mécanique avec ses caractéristiques d'auto-démarrage et sécurité est décrite dans la demande de brevet
L'invention se propose de réaliser un mécanisme d'échappement robuste et auto-démarrant, pour entretenir un résonateur à haute fréquence et à haut facteur de qualité.The invention proposes to provide a robust and self-starting exhaust mechanism for maintaining a high-frequency resonator with a high quality factor.
A cet effet, l'invention concerne un mécanisme oscillateur d'horlogerie selon la revendication 1. D'autres modes de réalisation préférés sont définis dans les revendications 2 à 16.To this end, the invention relates to a clockwork oscillator mechanism according to
L'invention concerne encore selon la revendication 17 un mouvement d'horlogerie comportant au moins un tel oscillateur.The invention also relates, according to
L'invention concerne encore selon la revendication 18 une montre comportant au moins un tel mouvement et/ou au moins un tel oscillateur.The invention also relates, according to
D'autres caractéristiques et avantages de l'invention apparaîtront à la lecture de la description détaillée qui va suivre, en référence aux dessins annexés, où :
- la
figure 1 représente, de façon schématisée, et en vue de dessus, un oscillateur qui comporte un balancier à lames flexibles entretenu par un échappement magnéto-mécanique ; - la
figure 2 représente, de façon schématisée, et en perspective, l'oscillateur de lafigure 1 , - la
figure 3 représente, de façon similaire à lafigure 1 , une géométrie particulière du mécanisme d'échappement magnéto-mécanique selon l'invention ; - la
figure 4 illustre, de façon schématisée, et en coupe selon un plan perpendiculaire au plan desfigures 1 à 3 , l'interaction répulsive entre des aimants que porte la roue d'échappement de lafigure 3 , et des palettes que comporte le résonateur de lafigure 3 ; - chacune des
figures 5 à 10 décrit, de façon similaire à lafigure 3 , une étape de la séquence de fonctionnement de l'échappement sur la palette de sortie: -
figure 5 : arc libre sans frottement ; -
figure 6 : dégagement sur la palette d'entrée ; -
figure 7 : avance de la roue d'échappement et impulsion sur la palette de sortie ; -
figure 8 : choc sur la palette de sortie ; -
figure 9 : léger recul de la roue d'échappement ; -
figure 10 : arc libre sans frottement ; - chacune des
figures 11 à 16 décrit, de façon similaire auxfigures 5 à 10 , une étape de la séquence de fonctionnement de l'échappement sur la palette d'entrée: -
figure 11 : arc libre sans frottement ; -
figure 12 : dégagement sur la palette de sortie; -
figure 13 : avance de la roue d'échappement et impulsion sur la palette d'entrée ; -
figure 14 : choc sur la palette d'entrée ; -
figure 15 : léger recul de la roue d'échappement ; -
figure 16 : arc libre sans frottement ; - la
figure 17 représente, de façon similaire à lafigure 3 , les trajectoires des aimants de la roue d'échappement dans le référentiel du résonateur ; - la
figure 18 représente, de façon similaire à lafigure 3 , les zones fonctionnelles mécaniques de la palette d'entrée magnétique ; - la
figure 19 représente, de façon similaire à lafigure 3 , les zones fonctionnelles magnétiques de la palette d'entrée magnétique ; - la
figure 20 représente, de façon similaire à lafigure 3 , les zones fonctionnelles mécaniques de la palette de sortie magnétique ; - la
figure 21 représente, de façon similaire à lafigure 3 , les zones fonctionnelles magnétiques de la palette de sortie magnétique ; - la
figure 22 représente, de façon similaire à lafigure 3 , les sécurités, la pénétration, les patins magnétiques et l'auto-démarrage; - la
figure 23 représente, de façon similaire à lafigure 3 , une variante de réalisation du correcteur d'isochronisme; - la
figure 24 représente, de façon similaire à lafigure 23 , une autre variante de réalisation du correcteur d'isochronisme; - la
figure 25 est un schéma de principe qui représente, de façon similaire à lafigure 3 , un point d'entrée et un point de sortie, qui sont défini par les intersections entre un premier cercle centré sur l'axe de résonateur et que suivent les barrières magnétiques des palettes d'entrée et de sortie du résonateur, et un deuxième cercle enveloppe de la roue d'échappement et centré sur l'axe d'échappement, au niveau desquels points d'entrée et de sortie évoluent respectivement la palette d'entrée et la palette de sortie du résonateur, et qui montre la définition de directions élémentaires orientées aux tangentes à ce premier cercle et à ce deuxième cercle, en ce point d'entrée et en ce point de sortie ; - la
figure 26 est un schéma-blocs représentant une montre comportant un mouvement comportant un oscillateur avec un balancier à lames flexibles entretenu par un échappement magnéto-mécanique selon l'invention.
- the
figure 1 represents, schematically, and in top view, an oscillator which comprises a flexible blade balance maintained by a magneto-mechanical escapement; - the
figure 2 represents, schematically, and in perspective, the oscillator of thefigure 1 , - the
figure 3 represents, similarly to thefigure 1 , a particular geometry of the magneto-mechanical escapement mechanism according to the invention; - the
figure 4 illustrates, schematically, and in section along a plane perpendicular to the plane offigures 1 to 3 , the repulsive interaction between magnets carried by the escape wheel of thefigure 3 , and the paddles that the resonator of thefigure 3 ; - each of the
figures 5 to 10 described, similarly tofigure 3 , a step in the operating sequence of the exhaust on the outlet pallet: -
figure 5 : free arc without friction; -
figure 6 : clearance on the entry pallet; -
figure 7 : advance of the escape wheel and impulse on the exit pallet; -
figure 8 : impact on the exit pallet; -
figure 9 : slight retraction of the escape wheel; -
figure 10 : free arc without friction; - each of the
figures 11 to 16 described, similarly tofigures 5 to 10 , a step in the operating sequence of the exhaust on the inlet pallet: -
figure 11 : free arc without friction; -
figure 12 : clearance on the output pallet; -
figure 13 : advance of the escape wheel and impulse on the input pallet; -
figure 14 : impact on the entry pallet; -
figure 15 : slight retraction of the escape wheel; -
figure 16 : free arc without friction; - the
figure 17 represents, similarly to thefigure 3 , the trajectories of the escapement wheel magnets in the resonator frame of reference; - the
figure 18 represents, similarly to thefigure 3 , the mechanical functional areas of the magnetic entry pallet; - the
figure 19 represents, similarly to thefigure 3 , the magnetic functional zones of the magnetic entry pallet; - the
figure 20 represents, similarly to thefigure 3 , the mechanical functional areas of the magnetic output pallet; - the
figure 21 represents, similarly to thefigure 3 , the magnetic functional areas of the magnetic output pallet; - the
figure 22 represents, similarly to thefigure 3 , the safety devices, the penetration, the magnetic pads and the auto-start; - the
figure 23 represents, similarly to thefigure 3 , an alternative embodiment of the isochronism corrector; - the
figure 24 represents, similarly to thefigure 23 , another variant embodiment of the isochronism corrector; - the
figure 25 is a block diagram which represents, similarly to thefigure 3 , an entry point and an exit point, which are defined by the intersections between a first circle centered on the resonator axis and followed by the magnetic barriers of the resonator entry and exit vanes, and a second circle casing of the escape wheel and centered on the escape axis, at which entry and exit points evolve respectively the entry pallet and the exit pallet of the resonator, and which shows the definition of elementary directions oriented at the tangents to this first circle and to this second circle, at this entry point and at this exit point; - the
figure 26 is a block diagram showing a watch comprising a movement comprising an oscillator with a flexible leaf balance maintained by a magneto-mechanical escapement according to the invention.
L'invention se propose de réaliser un mécanisme d'échappement robuste et auto-démarrant, pour entretenir un résonateur à haute fréquence et à haut facteur de qualité, avec des propriétés d'anti-décrochage.The invention proposes to provide a robust and self-starting escapement mechanism for maintaining a high-frequency, high-quality factor resonator, with anti-stall properties.
L'invention est une mise en pratique de l'échappement magnéto-mécanique, tel celui décrit dans la demande de brevet
Comme dans le brevet
L'invention est ici plus particulièrement décrite dans l'alternative magnétique. L'homme du métier trouvera dans l'art antérieur cité plus haut les moyens de son adaptation à une version électrostatique, ou encore mixte magnétique-électrostatique.The invention is here more particularly described in the magnetic alternative. Those skilled in the art will find in the prior art cited above the means of its adaptation to an electrostatic version, or even a mixed magnetic-electrostatic version.
L'oscillateur complet 300 comporte au moins un résonateur 100, notamment mais non limitativement un résonateur avec une au moins une masse inertielle 1, notamment un balancier, suspendue directement ou indirectement à une structure fixe 3, laquelle est destinée à être fixée à une platine ou similaire. Cette au moins une masse inertielle 1 est rappelée par des moyens de rappel élastiques. Dans une réalisation particulière, ces moyens de rappel élastique comportent des lames flexibles 2, tel que visible sur les
Au moins une masse inertielle 1 porte une palette d'entrée PE et une palette de sortie PS.At least one
L'oscillateur 300 comportant un mécanisme d'échappement 200. Le mécanisme d'échappement 200 est un mécanisme à fonctionnement intermittent, et comporte classiquement au moins une roue d'échappement 20, agencée pour tourner autour d'un axe de rotation OE, et qui comporte des bras 21 munis de dents mécaniques d'extrémité 22, agencées pour interagir alternativement avec les palettes d'entrée PE et de sortie PS. Chacune de ces dents 22 est agencée pour coopérer avec la palette d'entrée PE ou avec la palette de sortie PS pour l'entretien de l'oscillation du résonateur 100.The
Selon l'invention, ce mécanisme d'échappement 200 est magnéto-mécanique. La roue d'échappement 20 comporte au moins un aimant 23 au bout de chaque dent 22. Ces dents 22 sont agencées pour s'appuyer sur une palette mécanique 16, que comporte chaque palette d'entrée PE ou de sortie PS pendant l'arc libre du résonateur 100. Et la palette d'entrée PE comporte un premier agencement magnétique 30, la palette de sortie PS comporte un deuxième agencement magnétique 30. Et ce premier agencement magnétique 30 et ce deuxième agencement magnétique 30 comportent chacun un secteur annulaire, centré sur l'axe d'oscillation OR du résonateur 100, et définissant une première zone de barrière magnétique Z1. Cette première zone de barrière magnétique Z1 s'étend au-dessus et/ou au-dessous de la palette mécanique 16, en référence à la direction de l'axe d'oscillation OR, sur toute la longueur de cette palette mécanique apte à servir d'appui aux dents 22 pendant l'arc libre, de façon à constituer un mécanisme d'échappement à cylindre magnétique.According to the invention, this
Dans la variante particulière et non limitative illustrée, une telle masse inertielle 1 comporte un balancier 11, notamment en alliage de titane, comportant des masselottes de réglage 101. Cette masse inertielle 1 est solidaire de deux plaques 12, 13, en silicium, ou en silicium et dioxyde de silicium, ou similaire, comportant chacune une lame flexible 2. Les deux lames flexibles 2 représentées ici se croisent en projection sensiblement au niveau de l'axe d'oscillation OR de la masse inertielle 1. Les extrémités des deux plaques, opposées à celles fixées au balancier 11, constituent une masse 4 unique, ou deux masses 4 distinctes, chacune suspendue par des lames flexibles transversales 7 et/ou au moins une poutre rigide 6 à un corps intermédiaire 5, lui-même suspendu à la structure fixe 3 par des lames flexibles longitudinales 8 et/ou au moins une poutre rigide 9. Cet agencement particulier constitue une table anti-choc, efficace pour protéger le pivot flexible formé par les lames flexibles 2.In the particular and non-limiting variant illustrated, such an
De tels dispositifs anti-choc destinés à protéger les lames du résonateur sont notamment décrits dans les demandes de brevets
Ainsi, le résonateur 100 comporte un arrêtoir avec une palette d'entrée PE, et une palette de sortie PS, chacune apte, lors de l'oscillation du résonateur 100, à coopérer avec roue d'échappement 20. Ces palettes d'entrée PE et de sortie PS peuvent être distinctes, ou former un ensemble monobloc, chacune est agencée pour être fixée solidaire de la masse inertielle 1, et l'extrémité distale de chaque palette PE, PS est agencée pour coopérer avec les dents 22 de la roue 20. Chaque palette PE, PS comporte une palette mécanique 16 prévue pour un contact mécanique avec les dents 22, et cette palette mécanique 16 se termine avantageusement, mais non nécessairement, par un plan d'impulsion à l'extrémité distale de la palette concernée, du côté de la roue d'échappement 20.Thus, the
Selon l'invention, au moins une roue d'échappement 20 comporte au moins un aimant 23 au bout de chaque dent 22. Et l'oscillateur 300 comporte un premier agencement magnétique 30 pour la palette d'entrée PE et un deuxième agencement magnétique 30 pour la palette de sortie PS, et qui ne sont pas nécessairement identiques, comme on le verra plus loin. Chaque agencement magnétique 30 est agencé pour être rapporté sur une palette, ou bien fait partie intégrante d'une palette, au niveau au moins d'un flasque supérieur 15 et/ou d'un flasque inférieur 17, encadrant la palette mécanique 16, et disposé respectivement au-dessus ou au-dessous de la roue d'échappement 20 ; ces dispositions au-dessus et au-dessous s'entendent en référence à la direction de l'axe d'oscillation OR du résonateur 100, et de l'axe de rotation OE de la roue d'échappement 20, qui lui est parallèle.According to the invention, at least one
En somme, une palette d'entrée PE ou une palette de sortie PS comporte une palette mécanique 16, agencée pour coopérer avec les dents 22 de la roue 20, et un agencement magnétique 30 dont l'effet de champ magnétique vient en superposition avec les surfaces d'interaction mécanique potentielles de la palette mécanique 16. Cet agencement magnétique 30 peut être réalisé au niveau de différentes surfaces, notamment des surfaces de la palette mécanique 16, plus particulièrement en bordure ou au-delà de la zone d'interaction mécanique avec les dents 22 de la roue 20. Plus particulièrement, au moins un tel agencement magnétique 30 est implanté sous un flasque supérieur 15 et/ou sur un flasque inférieur 17 de l'une des palettes d'entrée PE ou de sortie PS. Plus particulièrement, au moins un tel agencement magnétique 30 est implanté sous un flasque supérieur 15 et sur un flasque inférieur 17 de l'une des palettes d'entrée PE ou de sortie PS. Plus particulièrement encore, un tel agencement magnétique 30 est implanté sous un flasque supérieur 15 et sur un flasque inférieur 17 de chacune des palettes d'entrée PE et de sortie PS.In short, an entry pallet PE or an exit pallet PS comprises a
Dans la variante illustrée par les figures, le résonateur 100 est équipé de palettes d'entrée PE et de sortie PS comportant des palettes mécaniques 16 sensiblement tubulaires, et auxquelles on a ajouté des aimants au-dessus et au-dessous, tel que visible sur les
La géométrie de l'échappement magnéto-mécanique est présentée avec plus de détails sur la
Les aimants 23 de la roue d'échappement 20 interagissent en répulsion avec les aimants portés par le résonateur qui sont disposés sur au moins un niveau, et plus particulièrement sur deux niveaux, au-dessus et au-dessous de la roue 20 selon le schéma de la
La séquence illustrée par les
Après un arc libre, sans frottement, sur la palette d'entrée PE située en partie gauche de la figure, tel que visible en
Ensuite, tel que visible en
Ensuite, dans une variante particulière, un contact mécanique, de type choc, entre la roue d'échappement 20 et la palette de sortie PS, permet d'amortir les rebonds, tel que visible en
Après ce contact mécanique éventuel, et tel que visible en
Une séquence similaire se produit sur la palette d'entrée après le dégagement de la palette de sortie, comme illustré sur les
-
figure 11 : arc libre sans frottement ; -
figure 12 dégagement sur la palette de sortie PS ; -
figure 13 : avance de la rue d'échappement et impulsion sur la palette d'entrée PE ; -
figure 14 : choc sur palette d'entrée ; -
figure 15 : léger recul de la roue d'échappement ; -
figure 16 : arc libre sans frottement.
-
figure 11 : free arc without friction; -
figure 12 clearance on the PS outlet pallet; -
figure 13 : advance of the escape route and impulse on the entry pallet PE; -
figure 14 : impact on the entry pallet; -
figure 15 : slight retraction of the escape wheel; -
figure 16 : free arc without friction.
Afin de comprendre la conception des agencements magnétiques 30 des palettes, que l'on peut dénommer palettes magnétiques, il est utile de représenter la trajectoire T des aimants 23, de préférence cylindriques, portés par les dents 22 de la roue d'échappement 20, dans le référentiel du résonateur 100, tel que visible sur la
Si l'on considère la palette d'entrée PE, le point le plus en bas à gauche de la trajectoire T, sur la
Ceci permet d'identifier les zones fonctionnelles des palettes magnétiques selon les
On distingue ici, sur la palette d'entrée PE en
- une zone de première impulsion ZP ;
- une zone de choc ZC ;
- une zone d'arc libre, non frottant, ZA ;
- une zone de dégagement et de deuxième impulsion ZD.
We distinguish here, on the entry pallet PE in
- a zone of first pulse ZP;
- a ZC shock zone;
- a free arc zone, not rubbing, ZA;
- a release zone and second impulse ZD.
Ces
L'agencement magnétique 30 comporte, dans les variantes de ces mêmes figures, un agencement complet, non limitatif puisque l'oscillateur 300 selon l'invention peut fonctionner avec tout ou partie des aimants ou zones aimantées décrits ci-après, à condition de comporter au moins les barrières magnétiques 31 :
- au moins une barrière magnétique 31, comportant au moins un aimant sensiblement cylindrique autour de l'axe d'oscillation OR du résonateur 10 ;
- au moins un patin magnétique 32, complété de préférence par un talon magnétique 33,
- au moins une zone ferromagnétique ou faiblement aimantée 34 pour la correction de l'isochronisme.
- at least one
magnetic barrier 31, comprising at least one substantially cylindrical magnet around the axis of oscillation OR of the resonator 10; - at least one
magnetic pad 32, preferably completed by amagnetic heel 33, - at least one ferromagnetic or weakly magnetized
zone 34 for the correction of isochronism.
La
- D1+: tangente à la palette d'entrée au point d'entrée, dirigée vers l'axe d'échappement OE ;
- D1- : tangente à la palette d'entrée au point d'entrée, de sens opposé à D1+ ;
- D2+ : tangente à la roue 20 au point d'entrée, dirigée dans le sens de rotation de la roue 20;
- D2- : tangente à la roue 20 au point d'entrée, de sens opposé à D2+ ;
- D3+ : tangente à la palette d'entrée au point de sortie, dirigée vers l'axe d'échappement OE ;
- D3- : tangente à la palette d'entrée au point de sortie, de sens opposé à D3+ ;
- D4+ : tangente à la roue 20 au point de sortie, dirigée dans le sens de rotation de la roue 20;
- D4- : tangente à la roue 20 au point de sortie, de sens opposé à D4+.
- D1 +: tangent to the entry pallet at the entry point, directed towards the OE exhaust axis;
- D1-: tangent to the entry pallet at the entry point, in the opposite direction to D1 +;
- D2 +: tangent to the
wheel 20 at the entry point, directed in the direction of rotation of thewheel 20; - D2-: tangent to the
wheel 20 at the entry point, in the opposite direction to D2 +; - D3 +: tangent to the entry pallet at the exit point, directed towards the OE exhaust axis;
- D3-: tangent to the entry pallet at the exit point, in the opposite direction to D3 +;
- D4 +: tangent to the
wheel 20 at the exit point, directed in the direction of rotation of thewheel 20; - D4-: tangent to the
wheel 20 at the exit point, in the opposite direction to D4 +.
L'agencement de ce mécanisme d'échappement selon l'invention définit une ou plusieurs zones fonctionnelles :
- une première zone Z1 de barrière magnétique, qui est présente dans tous les cas de figure, autour de la barrière magnétique 31, ou de chaque barrière magnétique 31 s'il y en a plusieurs ;
- une deuxième zone Z2 d'amélioration de l'auto-démarrage, autour du patin magnétique 32, ou de chaque patin magnétique 32 s'il y en a plusieurs ;
- une zone où se produisent les impulsions, à proximité immédiate ou en superposition au moins partielle, avec la deuxième zone Z2 quand elle existe, et de la première zone Z1 de barrière magnétique, ou de chaque première zone Z1 ;
- une troisième zone Z3 qui est une zone de correction de l'isochronisme du résonateur 100.
- a first magnetic barrier zone Z1, which is present in all cases, around the
magnetic barrier 31, or of eachmagnetic barrier 31 if there are several; - a second self-starting improvement zone Z2, around the
magnetic pad 32, or eachmagnetic pad 32 if there are several; - a zone where the pulses occur, in close proximity or in at least partial superposition, with the second zone Z2 when it exists, and of the first zone Z1 of the magnetic barrier, or of each first zone Z1;
- a third zone Z3 which is a zone for correcting the isochronism of the
resonator 100.
De préférence, mais non limitativement, et tel qu'illustré sur les figures, pour la palette d'entrée PE :
- la première zone de barrière magnétique Z1 est un secteur annulaire, centré sur l'axe de rotation OR du résonateur 100, qui s'étend au-dessus et/ou au-dessous de la palette mécanique, sur toute la longueur de la palette mécanique sur laquelle les dents 22 de la roue 20 viennent s'appuyer durant l'arc libre, tel que visible sur la
figure 19 ; - la deuxième zone d'amélioration de l'auto-démarrage Z2 est un secteur annulaire, centré sur l'axe de rotation OE de la roue 20, qui s'étend sensiblement dans les directions D2+ et D2-, et qui passe au-dessus et/ou au-dessous de l'extrémité de la palette mécanique de façon à recouvrir au moins le plan d'impulsion de la palette ;
- la troisième zone de correction de l'isochronisme Z3 est délimitée par la première zone de barrière magnétique Z1 et la deuxième zone d'amélioration de l'auto-démarrage Z2, et elle s'étend dans les directions D2- et D1- de façon à recouvrir, au-dessus et/ou au-dessous, l'aimant 23 de la dent 22de la roue 20 qui se trouve en appui sur la palette durant l'arc libre.
- the first magnetic barrier zone Z1 is an annular sector, centered on the axis of rotation OR of the
resonator 100, which extends above and / or below the mechanical pallet, over the entire length of the mechanical pallet on which theteeth 22 of thewheel 20 come to rest during the free arc, as visible on thefigure 19 ; - the second self-starting improvement zone Z2 is an annular sector, centered on the axis of rotation OE of the
wheel 20, which extends substantially in the directions D2 + and D2-, and which passes above and / or below the end of the mechanical pallet so as to cover at least the impulse plane of the pallet; - the third isochronism correction zone Z3 is delimited by the first magnetic barrier zone Z1 and the second self-start improvement zone Z2, and it extends in the directions D2- and D1- so to cover, above and / or below, the
magnet 23 of thetooth 22 of thewheel 20 which rests on the pallet during the free arc.
De façon similaire, pour la palette de sortie PS:
- la première zone de barrière magnétique Z1 est un secteur annulaire, centré sur l'axe de rotation OR du résonateur 100, qui s'étend au-dessus et/ou au-dessous de la palette mécanique, sur toute la longueur de la palette mécanique sur laquelle les dents 22 de la roue 20 viennent s'appuyer durant l'arc libre, tel que visible sur la
figure 21 ; - la deuxième zone d'amélioration de l'auto-démarrage Z2 est un secteur annulaire, centré sur l'axe de rotation OE de la roue 20, qui s'étend sensiblement dans les directions D4+ et D4-, et qui passe au-dessus et/ou au-dessous de l'extrémité de la palette mécanique de façon à recouvrir au moins le plan d'impulsion de la palette ;
- la troisième zone de correction de l'isochronisme Z3 est délimitée par la première zone de barrière magnétique Z1 et la deuxième zone d'amélioration de l'auto-démarrage Z2 et elle s'étend dans les directions D4- et D3- de façon à recouvrir, au-dessus et/ou au-dessous, l'aimant 23 de la
dent 22 de la roue 20 qui se trouve en appui sur la palette durant l'arc libre.
- the first magnetic barrier zone Z1 is an annular sector, centered on the axis of rotation OR of the
resonator 100, which extends above and / or below the mechanical pallet, over the entire length of the mechanical pallet on which theteeth 22 of thewheel 20 come to rest during the free arc, as visible on thefigure 21 ; - the second self-starting improvement zone Z2 is an annular sector, centered on the axis of rotation OE of the
wheel 20, which extends substantially in the directions D4 + and D4-, and which passes above and / or below the end of the mechanical pallet so as to cover at least the impulse plane of the pallet; - the third isochronism correction zone Z3 is delimited by the first magnetic barrier zone Z1 and the second self-start improvement zone Z2 and it extends in the directions D4- and D3- so as to cover, above and / or below, the
magnet 23 of thetooth 22 of thewheel 20 which rests on the pallet during the free arc.
La première zone Z1 de barrière magnétique est indispensable, et a pour fonction de repousser les dents 22 de la roue d'échappement 20, et permet ainsi de supprimer le contact mécanique afin que l'arc libre s'effectue sans frottement. Cette première zone Z1 de barrière magnétique peut être plus ou moins intense mais elle doit suivre un arc de cercle centré sur l'axe d'oscillation OR du résonateur 10. Il est possible d'augmenter l'intensité de la barrière si l'on désire éviter le choc mécanique entre les dents de la roue d'échappement 20 et les palettes mécaniques 16 des palettes PE et PS. Ou à l'inverse il est possible de diminuer l'intensité de la barrière, si l'on désire minimiser le recul de la roue d'échappement 20 après le choc. Un mécanisme comportant seulement cette barrière magnétique 31 est une variante d'échappement à cylindre magnétique, qui représente un perfectionnement du brevet
Le patin magnétique 32 de la deuxième zone Z2 d'amélioration de l'auto-démarrage, est optionnel. Il est avantageusement ajouté pour réduire le frottement entre la roue d'échappement 20 et l'extrémité de la palette mécanique 16 de la palette PE ou PS au moment du démarrage grâce à la répulsion magnétique. Ceci permet d'améliorer l'auto-démarrage de façon significative. La longueur du patin magnétique 32 ainsi que sa forme est ajustée pour optimiser l'auto-démarrage.The
Ce patin magnétique 32 a aussi un autre effet. Lorsque l'aimant de la roue d'échappement 20 passe à proximité du patin magnétique, il y a répulsion magnétique, ce qui transmet une impulsion au résonateur 100 et améliore sensiblement le rendement.This
De façon préférée, le patin magnétique 32 comporte au moins un aimant, et s'étend de façon sensiblement perpendiculaire à l'extrémité distale de la barrière magnétique 31 la plus proche de la roue d'échappement 20, et du côté de l'entrée en coopération entre un aimant 23 et l'agencement magnétique 30 de la palette PE ou PS concernée, en formant avec la barrière magnétique 31 un L majuscule inversé. Ce patin magnétique 32 n'est pas nécessairement droit, il peut aussi être légèrement courbe.Preferably, the
Dans une variante non illustrée, il peut comporter, à son extrémité distale opposée à la barrière magnétique 31, un ergot magnétique, du côté opposé à la roue d'échappement, et prolongeant la zone où se produisent les impulsions. Plus particulièrement cet ergot magnétique est situé à l'extrémité distale selon la direction D2- en ce qui concerne la palette d'entrée PE, et à l'extrémité distale selon la direction D4- en ce qui concerne la palette de sortie PS. Plus particulièrement encore, cet ergot magnétique s'étend selon la direction D1- en ce qui concerne la palette d'entrée PE, et selon la direction D3- en ce qui concerne la palette de sortie PS. Dans une autre variante non illustrée, le patin magnétique 32 s'étend selon la direction D2+, respectivement D4 +.In a variant not shown, it may include, at its distal end opposite to the
Notons que la deuxième zone Z2 d'amélioration de l'auto-démarrage n'est pas nécessairement identique à la zone où se produisent les impulsions, ce qui signifie que l'on peut ajuster l'impulsion sans affecter l'auto-démarrage.Note that the second zone Z2 for improving the self-start is not necessarily identical to the zone where the pulses occur, which means that the pulse can be adjusted without affecting the self-start.
Au niveau de la palette d'entrée PE, la
Dans une variante avantageuse, le patin magnétique 32 est complété par un talon magnétique 33, qui est sensiblement dans son alignement, et du côté opposé par rapport à la barrière magnétique, c'est-à-dire dans selon la direction D2+ au niveau de la palette d'entrée PE, et dans la direction D4+ au niveau de la palette de sortie PS. Ce talon magnétique 33 permet d'écarter la force de l'axe, et tend à chasser tangentiellement l'aimant 23 de la roue d'échappement 20, et permet de combattre la force de frottement, il permet que la répulsion dure jusqu'à l'extrémité de la palette. Ce talon magnétique 33 est encore utile au niveau de la cinématique globale, car le talon magnétique 33 situé sur la palette de sortie PS permet que le bras 21 suivant de la roue d'échappement 20 soit suffisamment engagé en coopération avec l'agencement magnétique 30 de la palette d'entrée PE, pour ne pas subir le seuil à vaincre lors de son passage à l'entrée dans cette zone.In an advantageous variant, the
De façon avantageuse, la longueur totale du patin magnétique 32 et du talon magnétique 33 qui le prolonge est voisine du demi-pas des extrémités de dents 22 sur le cercle CE qui est l'enveloppe de la trajectoire de la roue d'échappement 20.Advantageously, the total length of the
Dans une réalisation particulière, le talon magnétique 33 est agencé par rayons croissants depuis l'axe de rotation OE de la roue 20 en s'éloignant dudit magnétique (32).In a particular embodiment, the
Dans une réalisation particulière, le talon magnétique 33 est réalisé en escalier avec des gradins dégressifs, tel que visible sur les
Plus particulièrement, la longueur curviligne totale du patin magnétique 32 est supérieure à celle du talon magnétique 33, afin de donner une première impulsion : à l'entrée, l'ensemble du patin et du talon s'étend plus dans la direction D2- que dans la direction D2+, et à la sortie l'ensemble du patin et du talon s'étend plus dans la direction D4- que dans la direction D4+.More particularly, the total curvilinear length of the
L'ajout d'un tel patin magnétique 32 à la barrière magnétique 31 est avantageux pour l'auto-démarrage: si ce patin magnétique n'existe pas, la roue d'échappement peut, dans certaines configurations, venir en butée mécanique sur l'extrémité distale de la palette mécanique 16 de la palette PE ou PS, et le faible couple disponible au niveau de la roue d'échappement 20 ne permet pas de vaincre le frottement. L'avantage du patin magnétique 32 est donc de diminuer la force de frottement en extrémité de la palette mécanique 16 lors du démarrage, ce qui permet un auto-démarrage normal.The addition of such a
La simulation numérique montre qu'il est possible d'augmenter encore le rendement en ajoutant des aimants au voisinage de la deuxième zone d'amélioration de l'auto-démarrage Z2 si cela est nécessaire.Numerical simulation shows that it is possible to further increase the efficiency by adding magnets in the vicinity of the second self-start improvement zone Z2 if this is necessary.
Toutefois, il n'est plus utile d'augmenter le rendement lorsque l'amplitude nominale est atteinte. La quantité d'aimant à mettre pour optimiser l'impulsion dépend donc du résonateur 100 utilisé et de son facteur de qualité. Si le facteur de qualité est bas, on ajoute plus d'aimants. Si le facteur de qualité est élevé on en met moins.However, it is no longer useful to increase the efficiency when the nominal amplitude is reached. The quantity of magnet to be put in order to optimize the pulse therefore depends on the
Comme l'arc libre s'effectue sans frottement, excepté le premier choc, la forme de la palette mécanique 16 peut être optimisée pour minimiser les pertes et aussi pour favoriser l'auto-démarrage. En particulier, l'extrémité des palettes (plans d'impulsion) est optimisée pour favoriser le démarrage mais l'angle choisi ne permet plus de transmettre l'impulsion en fonctionnement stationnaire. De plus, il n'est pas nécessaire que les palettes mécaniques 16 des palettes soient des arcs de cercle centrés sur l'axe de rotation du résonateur. Si l'on observe les
De façon également optionnelle mais avantageuse, des petits aimants (à faible interaction) sont ajoutés dans la troisième zone Z3 de correction de l'isochronisme, afin d'ajuster l'anisochronisme du résonateur 100 provoqué par le mécanisme d'échappement 100. L'objectif est que cet anisochronisme induit soit compensé par celui du résonateur 100 afin que l'oscillateur total 300 soit parfaitement isochrone. La quantité et la position de ces petits aimants est ajustée par itérations jusqu'à l'obtention de l'effet désiré. En variante il peut aussi s'agir d'une simple surface ferromagnétique, coopérant faiblement avec les aimants 23 des dents 22 de la roue d'échappement 20. Cette troisième zone Z3 s'étend, du point de vue des dents 22 de la roue d'échappement 20, en amont de la première zone de barrière magnétique ; autrement formulé, cette troisième zone Z3 s'étend, par rapport à l'axe d'oscillation OR du résonateur, au-delà de la zone de barrière magnétique Z1, et, par rapport à l'axe de rotation OE de la roue d'échappement 20, au-delà de l'extrémité distale de la palette; quand l'agencement magnétique 30 comporte un patin magnétique 32 définissant une deuxième zone Z2, et une zone d'impulsions associée, la troisième zone Z3 est située, par rapport à l'axe de rotation OE de la roue d'échappement 20, au-delà de la deuxième zone Z2.Also optionally but advantageously, small magnets (low interaction) are added in the third isochronism correction zone Z3, in order to adjust the anisochronism of the
Afin de garantir une sécurité mécanique, les palettes mécaniques 16 portées par le résonateur 100 pénètrent dans les dents de la roue d'échappement 20 lorsque le résonateur 100 est dans sa position de repos. Les valeurs des pénétrations p1 et p2 sont représentées sur la
Au vu des pénétrations p1 et p2, lors du démarrage, le couple appliqué à la roue d'échappement 20 doit être suffisant pour pousser le résonateur 100 hors de sa position de repos afin que les dents puissent passer. Ceci peut rendre l'auto-démarrage difficile lorsque le résonateur est monté sur guidage flexible. L'ajout des patins magnétiques 32 sur les palettes améliore considérablement l'auto-démarrage pour deux raisons. Tout d'abord, la répulsion magnétique a pour effet de réduire le frottement entre les dents et l'extrémité des palettes. D'autre part, cette répulsion décale la position de repos du résonateur du côté adéquat pour que la dent puisse passer. Le résultat est que l'oscillateur est auto-démarrant sur la majorité de la plage de couple utile.In view of the penetrations p1 and p2, during start-up, the torque applied to the
L'effet des aimants de la troisième zone Z3 de correction de l'isochronisme est de produire une faible perturbation de la masse inertielle 1, de sorte à ajuster l'anisochronisme de l'échappement, afin qu'il y ait compensation avec l'anisochronisme du résonateur 100. Cette correction d'anisochronisme n'est pas indispensable mais peut se révéler avantageuse suivant le type de résonateur utilisé.The effect of the magnets of the third isochronism correction zone Z3 is to produce a small disturbance of the
Pour réaliser cette zone ferromagnétique ou faiblement aimantée 34, au lieu de disposer des pixels d'aimant de façon régulière comme dans le correcteur d'anisochronisme des
Une autre variante est présentée à la
Une autre variante encore, dans laquelle le correcteur d'anisochronisme est disposé uniquement sur la palette d'entrée PE est montrée à la
Dans une autre variante on peut mettre le correcteur d'anisochronisme uniquement sur les palettes magnétiques du flasque supérieur 15, ou alors uniquement sur les palettes magnétiques du flasque inférieur 17.In another variant, the anisochronism corrector can be placed only on the magnetic paddles of the
On peut aussi imaginer une variante dans laquelle l'anisochronisme est ajustable, en variant la distance entre les aimants de la troisième zone Z3 supérieure et les aimants de la troisième zone Z3 inférieure, ce qui a pour effet de varier l'intensité du champ magnétique vu par les aimants 23 de la roue d'échappement 20 lorsqu'ils se trouvent dans la troisième zone Z3.One can also imagine a variant in which the anisochronism is adjustable, by varying the distance between the magnets of the third upper zone Z3 and the magnets of the third lower zone Z3, which has the effect of varying the intensity of the magnetic field. seen by the
Dans une variante, la troisième zone Z3 contient un excès sacrificiel de fer ou d'aimants, cet excès sacrificiel est prévu pour être, au moins en partie, supprimé sélectivement selon le résultat d'une mesure de l'anisochronisme de l'oscillateur 300 complet, pour le rétablissement de son isochronisme.In a variant, the third zone Z3 contains a sacrificial excess of iron or of magnets, this sacrificial excess is intended to be, at least in part, selectively removed according to the result of a measurement of the anisochronism of the
Plus particulièrement, l'agencement magnétique 30 est réalisé avec un surplus de pixels d'aimants dans la troisième zone Z3, les aimants excédentaires peuvent ensuite être supprimés par ablation laser sélective après avoir effectué une mesure de l'anisochronisme.More particularly, the
Dans la variante comportant une plaquette ferromagnétique d'épaisseur variable dans la troisième zone Z3, l'interaction se fait en attraction plutôt qu'en répulsion.In the variant comprising a ferromagnetic plate of variable thickness in the third zone Z3, the interaction takes place in attraction rather than repulsion.
L'invention peut donc être réalisée selon différentes configurations, mais toujours avec une première zone barrière magnétique Z1, et notamment et non limitativement:
- une première zone Z1 de barrière magnétique, et une deuxième zone Z2 d'amélioration de l'auto-démarrage, avec seulement un patin magnétique 32;
- une première zone Z1 de barrière magnétique, une deuxième zone Z2 d'amélioration de l'auto-démarrage, avec un patin magnétique 32, et un talon magnétique 33;
- une première zone Z1 de barrière magnétique et une troisième zone Z3 de correction de l'isochronisme ;
- une première zone Z1 de barrière magnétique, une deuxième zone Z2 d'amélioration de l'auto-démarrage, et une troisième zone Z3 correction de l'isochronisme, avec seulement un patin magnétique 32,
- une première zone Z1 de barrière magnétique, une deuxième zone Z2 d'amélioration de l'auto-démarrage, et une troisième zone Z3 correction de l'isochronisme, avec un patin magnétique 32 et
un talon magnétique 33.
- a first magnetic barrier zone Z1, and a second self-starting improvement zone Z2, with only one
magnetic pad 32; - a first magnetic barrier zone Z1, a second self-starting improvement zone Z2, with a
magnetic pad 32, and amagnetic heel 33; - a first magnetic barrier zone Z1 and a third isochronism correction zone Z3;
- a first magnetic barrier zone Z1, a second self-start improvement zone Z2, and a third isochronism correction zone Z3, with only one
magnetic pad 32, - a first magnetic barrier zone Z1, a second self-start improvement zone Z2, and a third isochronism correction zone Z3, with a
magnetic pad 32 and amagnetic heel 33.
Il est naturellement possible de faire une inversion technique de l'invention telle que décrite ci-dessus, qui consiste à mettre des aimants ponctuels sur les palettes du résonateur 100, et à agencer sur la roue d'échappement 20 des structures magnétiques plus compliquées, afin de produire les mêmes effets de barrière magnétique, patin magnétique, impulsion et correcteur d'anisochronisme exposés ci-dessus.It is naturally possible to carry out a technical reversal of the invention as described above, which consists in putting point magnets on the pallets of the
On remarque que les versions présentées ci-dessus et illustrées, avec des aimants ponctuels sur la roue d'échappement, possèdent l'avantage de minimiser l'inertie de la roue d'échappement 20. Ceci est important pour garantir le bon fonctionnement de l'échappement lorsque l'oscillateur 300 subit des accélérations externes, ce qui est fréquent lors de l'utilisation normale d'une montre, et pour garantir une excellente tenue au porté.It should be noted that the versions presented above and illustrated, with point magnets on the escape wheel, have the advantage of minimizing the inertia of the
L'invention concerne encore un mouvement d'horlogerie 500 comportant au moins un tel oscillateur 300.The invention also relates to a
L'invention concerne encore une montre 1000 comportant au moins un tel mouvement 500 et/ou au moins un tel oscillateur 300.The invention also relates to a
Claims (18)
- Timepiece oscillator (300) including at least one resonator (100), with an inertial mass (1) returned by elastic return means (2) with respect to a fixed structure (3), said resonator (100) oscillating about an axis of oscillation (OR), said inertial mass (1) carrying an entry pallet (PE) and an exit pallet (PS), said oscillator (300) comprising an escapement mechanism (200) including an escape wheel (20) arranged to rotate about an axis of rotation (OE) and including end teeth (22), each arranged to cooperate with said entry pallet (PE) or with said exit pallet (PS) to maintain the oscillation of said resonator (100), said escapement mechanism (200) being magneto-mechanical and said escape wheel (20) including at least one magnet (23) at the end of each said tooth (22), said teeth (22) being arranged to act alternately with said entry and exit pallets (PE; PS), said entry pallet (PE) including a first magnetic arrangement (30), said exit pallet (PS) including a second magnetic arrangement (30), characterized in that said first magnetic arrangement (30) and said second magnetic arrangement (30) each include an annular sector, centred on said axis of oscillation (OR) of said resonator (100), and defining a first magnetic barrier area (Z1), which extends above and/or below said mechanical pallet-stone (16) of said entry pallet (PE) or of said exit pallet (PS), with reference to the direction of said axis of oscillation (OR), over the entire length of said mechanical pallet-stone able to act as support for said teeth (22) during the supplementary arc, in order to form a magnetic cylinder escapement mechanism.
- Oscillator (300) according to claim 1, characterized in that said first magnetic arrangement (30) and/or said second magnetic arrangement (30) includes, for improving the self-starting function, on said entry pallet (PE) and/or on said exit pallet (PS), at least one magnetic pad (32) which includes at least one magnet, and which extends into a second self-starting improvement area (Z2), which is an annular sector, centred on said axis of rotation (OE) of said wheel (20), and which extends, as regards said entry pallet (PE), substantially in a tangent direction of entry (D2+, D2-) which is tangent to said wheel (20) and which passes above and/or below said mechanical pallet-stone (16) of said entry pallet (PE), and/or as regards said exit pallet (PS), substantially in an tangent direction of exit (D4+, D4-) which is tangent to said wheel (20) and which passes above and/or below said mechanical pallet-stone (16) of said exit pallet (PS), with reference to the direction of said axis of oscillation (OR), in order to cover at least one impulse face comprised in the end of said entry pallet (PE) and/or said exit pallet (PS).
- Oscillator (300) according to claim 2, characterized in that said magnetic pad (32) is extended, from said magnetic barrier (31) and in the direction tangent to said wheel (20) and which goes in the direction of rotation of said wheel (20), by a magnetic tail portion (33), which is substantially in the alignment of said magnetic pad (32), and which is arranged to apply to a said magnet (23) of said wheel (20) a force that tends to drive it tangentially, and which is arranged to combat the friction force at the distal end of said pallet on the side of said escape wheel (20).
- Oscillator (300) according to claim 3, characterized in that said magnetic tail portion (33) is arranged in increasing radii from said axis of rotation (OE) of said wheel (20) away from said magnetic pad (32).
- Oscillator (300) according to claim 3 or 4, characterized in that said magnetic tail portion (33) is made in a set of decreasing steps.
- Oscillator (300) according to one of claims 2 to 5, characterized in that the total curvilinear length of said magnetic pad (32) and of any magnetic tail portion (33) which extends said magnetic pad (32), is close to a half-pitch of the ends of said teeth (22) on a circle (CE) which defines the envelope of the trajectory of said teeth (22) of said escape wheel (20).
- Oscillator (300) according to claim 3, characterized in that the length of said magnetic pad (32) is greater than that of said magnetic tail portion (33), in order to give a first impulse.
- Oscillator (300) according to claim 3 or 7, characterized in that said magnetic pad (32) and said magnetic tail portion (33) are arranged to define a continuous magnetic field on the curvilinear arc on which they are arranged.
- Oscillator (300) according to one of claims 2 to 8, characterized in that said magnetic pad (32) includes, at its distal end opposite to said magnetic barrier (31), a magnetic lug on the side opposite to said escape wheel (20), and extending the second self-starting improvement area (Z2).
- Oscillator (300) according to one of claims 1 to 9, characterized in that said magnetic arrangement (30) includes a third isochronism correction area (Z3) which extends, from the point of view of said teeth (22) of said wheel (20), upstream of said first magnetic barrier area (Z1), and, with respect to said axis of rotation (OE) of said escape wheel (20), beyond the distal end of said pallet-stone (16), at the entry in a tangential direction of entry (D2-) opposite to the direction of rotation of said wheel (20) and in a radial direction of entry (D1-) away from the centre of rotation (OE) of said wheel (20), and at the exit in a tangential direction of exit (D4-) opposite to the direction of rotation of said wheel (20) and in a radial direction of exit (D3-) away from the centre of rotation (OE) of said wheel (20), in order to cover, above and/or below said mechanical pallet-stone (16) of said entry pallet (PE) or of said exit pallet (PS), with reference to the direction of said axis of oscillation (OR), a said magnet (23) of said wheel (20) which is resting on said pallet during the supplementary arc.
- Oscillator (300) according to claim 10 and according to one of claims 2 to 9, characterized in that said third area (Z3) is located, with respect to said axis of rotation (OE) of said escape wheel (20), beyond said second self-starting improvement area (Z2) which delimits, with said first magnetic barrier area (Z1), said third isochronism correction area (Z3).
- Oscillator (300) according to claim 10 or 11, characterized in that said third area (Z3) is an area of weak magnetic attractive or repulsive interaction with a said magnet (23), of lower magnetic interaction than that of the other areas of magnetic interaction of said magnetic arrangement (30) of which it forms part.
- Oscillator (300) according to claim 10 or 11, characterized in that said third area (Z3) contains iron or magnets which are in magnetic attractive or repulsive interaction with a said magnet (23) during the supplementary arc.
- Oscillator (300) according to claim 13, characterized in that the mean quantity of iron or magnet per surface unit is constant in the direction tangent to said wheel (20), and varies in the direction tangent to said pallet, in order to exhibit a magnetic interaction with a said magnet, which is variable according to the angle of said inertial mass (1) with respect to its rest position.
- Oscillator (300) according to one of claims 10 to 14, characterized in that said third area (Z3) contains a sacrificial excess of iron or of magnets, arranged to be at least partly selectively removed according to the result of measurement of the anisochronism of said complete oscillator (300), in order to restore the isochronism of said oscillator (300).
- Oscillator (300) according to one of claims 1 to 15, characterized in that said inertial mass (1) includes at least one balance.
- Timepiece movement (500) including at least one oscillator (300) according to one of claims 1 to 16.
- Watch (1000) including at least one movement (500) according to claim 17 and/or at least one oscillator (300) according to one of claims 1 to 15.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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EP18195530.3A EP3627242B1 (en) | 2018-09-19 | 2018-09-19 | Optimised magneto-mechanical timepiece escapement mechanism |
JP2019165896A JP6796697B2 (en) | 2018-09-19 | 2019-09-12 | Optimized magnetic mechanical timekeeper escapement mechanism |
US16/571,428 US11567456B2 (en) | 2018-09-19 | 2019-09-16 | Optimised magneto-mechanical timepiece escapement mechanism |
CN201910884458.0A CN110928170B (en) | 2018-09-19 | 2019-09-19 | Optimized magneto-mechanical timepiece escapement |
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EP18195530.3A EP3627242B1 (en) | 2018-09-19 | 2018-09-19 | Optimised magneto-mechanical timepiece escapement mechanism |
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EP3627242A1 EP3627242A1 (en) | 2020-03-25 |
EP3627242B1 true EP3627242B1 (en) | 2021-07-21 |
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EP (1) | EP3627242B1 (en) |
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EP3182214A1 (en) | 2015-12-16 | 2017-06-21 | Société anonyme de la Manufacture d'Horlogerie Audemars Piguet & Cie | Mechanical oscillator for timepiece, adjustment mechanism comprising said mechanical oscillator, and clock movement |
EP3208667A1 (en) | 2016-02-18 | 2017-08-23 | The Swatch Group Research and Development Ltd | Magnetic escapement mobile for timepiece |
US11029649B2 (en) | 2016-03-14 | 2021-06-08 | LVHM Swiss Manufactures SA | Device for timepiece, clockwork movement and timepiece comprising such a device |
EP3339982B1 (en) | 2016-12-23 | 2021-08-25 | The Swatch Group Research and Development Ltd | Regulation by mechanical breaking of a horological mechanical oscillator |
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2018
- 2018-09-19 EP EP18195530.3A patent/EP3627242B1/en active Active
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2019
- 2019-09-12 JP JP2019165896A patent/JP6796697B2/en active Active
- 2019-09-16 US US16/571,428 patent/US11567456B2/en active Active
- 2019-09-19 CN CN201910884458.0A patent/CN110928170B/en active Active
Also Published As
Publication number | Publication date |
---|---|
JP2020046426A (en) | 2020-03-26 |
CN110928170B (en) | 2021-08-27 |
JP6796697B2 (en) | 2020-12-09 |
CN110928170A (en) | 2020-03-27 |
US11567456B2 (en) | 2023-01-31 |
US20200089168A1 (en) | 2020-03-19 |
EP3627242A1 (en) | 2020-03-25 |
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