EP2177960B1 - Blocking mechanism for a clock drive module - Google Patents
Blocking mechanism for a clock drive module Download PDFInfo
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- EP2177960B1 EP2177960B1 EP08166740A EP08166740A EP2177960B1 EP 2177960 B1 EP2177960 B1 EP 2177960B1 EP 08166740 A EP08166740 A EP 08166740A EP 08166740 A EP08166740 A EP 08166740A EP 2177960 B1 EP2177960 B1 EP 2177960B1
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- EP
- European Patent Office
- Prior art keywords
- finger
- toothed wheel
- locking
- teeth
- actuator
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- 230000000903 blocking effect Effects 0.000 title description 14
- 230000007246 mechanism Effects 0.000 title description 14
- 238000000034 method Methods 0.000 claims abstract description 9
- 238000013519 translation Methods 0.000 claims description 15
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- 238000010168 coupling process Methods 0.000 description 2
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- 230000007423 decrease Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
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- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
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- 230000003245 working effect Effects 0.000 description 1
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Classifications
-
- G—PHYSICS
- G04—HOROLOGY
- G04F—TIME-INTERVAL MEASURING
- G04F5/00—Apparatus for producing preselected time intervals for use as timing standards
-
- 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
- G04C3/08—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 mechanical oscillator other than a pendulum or balance, e.g. by a tuning fork, e.g. electrostatically
- G04C3/12—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 mechanical oscillator other than a pendulum or balance, e.g. by a tuning fork, e.g. electrostatically driven by piezoelectric means; driven by magneto-strictive means
Definitions
- the present invention relates to a locking mechanism for watchmaking training module.
- the invention is particularly suitable in particular for electromechanical micromotors for wristwatches.
- Stepper motors are well known for turning electrical pulses into rotating mechanical motion.
- the first step-by-step engine was invented in 1936 by Mr. LAVET for the watch industry; and now such engines are found in most needle quartz watches to drive the movement. This type of motor is also very common in all devices where it is desired to control the speed or positioning.
- the "LAVET” motors have permanent magnets that can generate stable positions between electrical pulses.
- the permanent torque thus exerted on the rotor, ie the rotating part of the engine, is supposed to prevent any inadvertent movement, even during shocks on the watch.
- the permanent torque generally chosen to be much greater than the engine torque, is also intended to prevent incrementing more than one step simultaneously.
- a LAVET motor drives a wheel rotating 180 degrees at each electrical pulse, every minute; this wheel is equipped at two diametrically opposite ends with lugs which engage in successive radial slots of the minute wheel. Thus, between each pulse, the two lugs are engaged in two successive radial slots of the minute wheel and block any possible movement.
- stepper motors for example the electromechanical micromotor described in the document EP1921520 of the applicant, which comprises a linear actuator provided with an active pawl for driving the rotor in rotation, and a passive pawl to prevent rotation of the rotor in the opposite direction during the return of the actuator during its oscillations.
- electromechanical micromotor described in the document EP1921520 of the applicant, which comprises a linear actuator provided with an active pawl for driving the rotor in rotation, and a passive pawl to prevent rotation of the rotor in the opposite direction during the return of the actuator during its oscillations.
- the same blocking and incrementing features would also be desirable; however, it is clear that the latching mechanism described above, specific to a LAVET motor, is not adequate.
- An object of the present invention is to provide a new mechanism which locks in stable indexing positions, and simultaneously prevents incrementation of an interlocked wheel by more than one unit simultaneously.
- Another object of the present invention is to propose a locking mechanism that can be applied to any type of stepper motor, and not only to a "LAVET" type motor.
- An advantage of the proposed solution is to be applicable or associated with any type of stepper motor, including for example regulating devices for mechanical watches, and potentially any type of clock training module.
- Another advantage of the proposed solution is to no longer require permanent magnets to stabilize the rest position of the workings driven by the engine.
- An additional advantage of the proposed solution is to provide an electromechanical stepper motor passive pawls to prevent the rotation of the rotor in the opposite direction during the return of the actuator during its oscillations.
- the proposed solution for the blocking fundamentally differs from the locking system applied to the Lavet engine in that the energy consumption required is not related to the value of the maximum torque of the engine.
- An important advantage of the proposed solution is therefore that the energy consumption of the locking system is potentially significantly lower than that of the engine itself.
- the figure 1 illustrates a drive module 1, intended to mesh with a watch wheel, comprising a known step-by-step electromechanical micromotor.
- the micromotor consists of actuators 2 which comprise moving stylets 3 rotating a rotor through active pawls 5 cooperating with the toothed wheel 7 of the rotor. Because of their active rotor drive function 5, the "actuator" actuator terminology for the actuators 2 is also often used.
- This cooperation between the gearwheel 7 and the ratchets, as well as the sequential drive mechanism of the rotor rotation are precisely illustrated in detail on the figure 1 bis which is an enlargement of the figure 1 at the gearwheel 7, at 5 o'clock in the plane of the engine.
- each actuator 2 is composed of two generally symmetrical parts, the first part comprising an active pusher of thrust and the second part comprising an active traction pawl in order to improve the efficiency of the engine by exerting a higher torque.
- each actuator 2 is associated with a passive pawl 6 held elastically geared with the toothed wheel 7 so as to ensure on the one hand a precise angular positioning during the training phases when the stylets 3 are moved, and secondly to form a locking mechanism of the toothed wheel 7 to prevent any movement back.
- the figure 1 bis illustrates the drive mechanism and indexing of the stepper motor of the figure 1 where only one passive pawl 6 and one active pawl are shown.
- the active pawl 5 located at the end of the stylet, has oscillating movements in the direction 4 tangent to the toothed wheel 7.
- the indentations of the toothed wheel 7 tend to drive it in a movement in the direction of rotation anti-clockwise during traction movements of the stylus 3, while each tooth of the associated passive pawl 6 then gives indexing positions for the rotation of the toothed wheel, typically corresponding to a pitch of the motor.
- the passive pawl 6 prevents the active pawl 5 from driving the toothed wheel 7 in the opposite direction and to maintain the angular position of the toothed wheel 7 between each step.
- This locking and indexing mechanism described does not, however, prevent any unwanted acceleration of the toothed wheel 7 in the counter-clockwise direction, as for example in the case of excessive engine torque exerted by the ratchet or pawls active 5 if the electrical impulses generated by the actuators 2 are of too great amplitude, or even between the steps of the engine if shocks are experienced by the watch case containing such an electromechanical motor.
- FIGS 2 to 7 illustrate a preferred embodiment of the locking and indexing mechanism according to the invention, which make it possible to overcome these shortcomings of the prior art. They all represent a sectional view in the plane of rotation of a toothed wheel 7 driven by an active pawl 5 which engages in the teeth of the toothed wheel 7 and moves linearly by oscillation movements in a tangent direction to the toothed wheel 7 at the snap, and the locking device, composed in particular of two separate locking fingers 8 and 9, in different positions depending on the state of the mechanism.
- the first locking pin 8 is housed between two stop elements 15, 16 so that it is guided to have only vertical movements and thus to have only one degree of freedom in translation.
- this degree of freedom could, however, also be rotated.
- This first finger is intended to block any rotational movement of the toothed wheel when engaged in one of his teeth.
- the second locking finger 9 is arranged between two stops 10 and 11, so that it limits the angular travel of the toothed wheel when engaged in one of its teeth.
- the spacing between the stops 10,11 limits the angular travel of the toothed wheel 7 to the displacement of a single tooth, thus corresponding to a pitch of the motor.
- the figure 2 illustrates the locking device according to the invention in a state at rest, before a motor step.
- the two fingers of 8 and 9 are raised, and housed in two consecutive teeth of the toothed wheel 7.
- the second locking finger 9 is also housed against the first stop 10.
- the pawl 5 is engaged in one of the teeth 71 of the toothed wheel 7, and moves according to linear oscillation movements according to the arrow 4 (NB: the mobile stylet, present on the Figures 1 and 1 bis, is no longer materialized in this figure or on the following because it is not necessary to understand the locking mechanism described below).
- NB the mobile stylet
- the figure 3 illustrates the locking device during the lowering step (arrow A) of the first locking finger 9.
- the only degree of freedom of the first locking finger 8 is in translation according to a radius of the toothed wheel 7, ie perpendicular to the movement of the actuator and the active pawl 5, as will be seen in the following figures.
- the figure 4 illustrates the locking device according to the invention during a pitch of the motor, ie when the toothed wheel 7 is rotated by the active pawl 5 (step B, illustrated by the corresponding arrows B).
- the rotation of the toothed wheel 7, in one of the teeth of which the second locking finger 9 is engaged thus causes the finger 9 in the same translational movement as that of the pawl, according to the arrow (B), in a tangent direction to the wheel and the meaning corresponding to one of its two degrees of freedom.
- the toothed wheel 7 stops as soon as the second finger 9 is positioned against the second stop 11, which prevents any further rotation of the toothed wheel.
- the figure 5 illustrates the locking device according to the invention, in the blocking state of the second locking finger 9 against the stop 11.
- the arrow (C) illustrates the step of raising the first locking finger 8 which is to engage in one of the teeth of the toothed wheel and thus blocks any movement of the toothed wheel 7, even in the opposite direction to that in which it was activated until then, ie in the direction of the clockwise for the described embodiment.
- the device will be again in a stable state, preventing any rotational movement of the toothed wheel, but this time with the two fingers 8,9 spaced apart from two teeth, unlike the figure 2 where the two fingers were housed in two consecutive teeth of the wheel.
- the angular travel of the toothed wheel 7 therefore corresponds, according to the illustrated embodiment, to at most one tooth of the toothed wheel 7.
- the figure 6 illustrates the locking device after raising the first locking finger and during the return steps of the actuator (arrow D) and the second locking finger (arrow E2), which had to be lowered beforehand (arrow E1) for to be released from the tooth to allow the translation movement in the same direction as the pawl 5.
- the steps (D) and (E2) of the return of the active pawl 5 and the second finger 9 can be executed independently one of the other and sequentially in any order.
- the figure 7 illustrates the locking device according to the invention at rest at the end of a step of the motor, ie once the second finger 8 has returned in abutment against the first stop 10 and that it has been raised in one of the teeth of the toothed wheel 7 (step F, illustrated by the corresponding arrow in the figure).
- step F illustrated by the corresponding arrow in the figure.
- the first finger 8 has a degree of freedom in translation, vertically according to the figures, to be high or lowered, and thus engaged or disengaged in one of the teeth of the toothed wheel 7, and the second finger 9 has the same degree of freedom in translation, and a degree of freedom in additional translation between the stops 10 and 11 , horizontal according to the figures, and which corresponds to the direction of the oscillations 4 of the active pawl 5 and the tangent to the toothed wheel 7 at the gear with the finger 9.
- FIG 7 it is also possible to distinguish an electronic circuit 14, preferably programmable, for managing the sequences of movements of the locking fingers 8 and 9.
- This circuit 14 has been added to this figure because it corresponds to a preferred embodiment of the invention, according to which the movements of the fingers 8, 9 are controlled by electrical signals causing the movement electrostatic actuators 12,13 respectively coupled to each finger 8,9.
- the motor actuator 2 has also been added to avoid confusion with the actuators 12,13 of the fingers 8,9.
- the lowering of the first finger 8 after its release from said toothed wheel 7 corresponds to a first step A passing from the stable state 110 of the system "at rest”; at a state 010 in which the rotation of the toothed wheel is possible.
- the driving of the toothed wheel 7 in rotation by the active pawl 5 of the actuator 2 corresponds to a second step B, which causes the movement of the second locking pin 9 of the abutment 10 according to the state 010 of the system, towards the other stop 11, which blocks the stroke of the gearwheel further and then brings the system into the state 011.
- Step D of disengagement and return of the active pawl 5 of the actuator 2 does not change the state of the locking system; however the corresponding step E disengagement and return of the second finger against the first stop 10 can be split into two substeps E1, lowering the second finger bringing the system of the state 111 to the state 101, and E2, bringing the system of the state 101 to 100.
- the steps D and E of release and return of the active pawl 5 and the second finger 9 take place simultaneously.
- step F of raising the second finger 9 which leads it to engage in one of the teeth of the toothed wheel 7 brings the system to the initial state 110 said "rest” and thus ends the cycle of incrementation of a motor pitch.
- the sequencing described which ensures that always at least one of the two fingers is engaged in one of the teeth, allows either to maintain the locking device in a "stable” state, ie in which the toothed wheel is completely immobilized (case of first finger engaged in the toothing of the wheel 7), either in a "bounded” state, ie in which the travel of the toothed wheel is limited (in the case of the second finger 9 engaged in the toothing of the wheel 7).
- Obtaining stable states according to the invention therefore no longer requires the use of magnets to apply resting positioning torques;
- the first finger eliminates the use of a passive ratchet whose machining is more complex and the cost therefore more expensive.
- the proposed solution decreases the total cost of the locking device while improving its functionality since now the angular travel of the gear wheel is always bounded.
- the person skilled in the art will also be able to observe that the manner of actuating the pawls 5 meshing with the toothed wheel is completely transparent for the device and the locking method described, so that it applies equally to clockwork wheels. electromechanical than purely mechanical.
- the desired sequence is preferably obtained by electronic programming; however, an embodiment can be conceived according to which at least the lowering and raising movements of the fingers can be controlled by a cam.
- the finger actuators are, according to a preferred embodiment of the invention, electrostatic in the context of an implementation of a micromotor locking device for wristwatches, it is also possible to imagine using hydraulic actuators. for other horological applications.
- the shape of the bevel teeth illustrated according to the figures described and which tends to rotate the toothed wheel counterclockwise could be modified by a similar shape in the other direction or for example in niche to ensure complete blockage of the wheel even in case of impact.
- a slot form would make it impossible to release the tooth under the action of forces external to the system, thanks to the cooperation with a shape identical but corresponding inverse slot for the end of the locking fingers 8.9.
- the form of teeth shown in the figures is, however, adapted to mesh cogwheels in the direction of clockwise, and thus allows an easy association with needle wheel display for example.
- Training module 2 Motor actuator 3 Mobile stylus of the actuator 4 Direction of oscillations of the mobile stylus 5 Active ratchet of the actuator 6 Passive ratchet 7 Gear wheel 8 First blocking finger 9 Second locking finger 10 First stop for the second locking finger 11 Second stop for the second locking finger 12 Actuator of the first locking finger 13 Actuator of the second locking finger 14 Programmable circuit for actuating the locking fingers 15 First stop element of the first locking finger 16 Second stop element of the first locking finger AT Step of lowering the first locking finger B Step of driving the gearwheel and the second locking finger VS First finger recovery step D Active ratchet return step in the opposite direction to the gear drive E1 Step of lowering the second locking finger E2 Step of return of the second blocking finger F Step of raising the second locking finger 110 State of the system at rest, two fingers raised on two consecutive teeth, second finger raised against the first stop 010 State of the system allowing the incrementation of a tooth, first finger down, second finger raised against the first stop 011 State of the system after the incrementation of a tooth, second finger raised and against
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- General Physics & Mathematics (AREA)
- Electromechanical Clocks (AREA)
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Abstract
Description
La présente invention concerne un mécanisme de blocage pour module d'entraînement horloger. L'invention est particulièrement adaptée notamment à des micromoteurs électromécaniques pour montres bracelets.The present invention relates to a locking mechanism for watchmaking training module. The invention is particularly suitable in particular for electromechanical micromotors for wristwatches.
Les moteurs pas-à-pas sont bien connus pour transformer des impulsions électriques en mouvement mécanique rotatif. Le premier moteur pas-à-pas a été inventé en 1936 par M. LAVET pour l'industrie horlogère; et désormais de tels moteurs se retrouvent dans la plupart des montres à quartz à aiguilles pour en entraîner le mouvement. Ce type de moteur est du reste très courant dans tous les dispositifs où l'on souhaite faire du contrôle de vitesse ou de positionnement.Stepper motors are well known for turning electrical pulses into rotating mechanical motion. The first step-by-step engine was invented in 1936 by Mr. LAVET for the watch industry; and now such engines are found in most needle quartz watches to drive the movement. This type of motor is also very common in all devices where it is desired to control the speed or positioning.
Les moteurs « LAVET » possèdent des aimants permanents qui permettent de générer des positionnements stables entre des impulsions électriques. Le couple permanent ainsi exercé sur le rotor, i.e. la partie rotative du moteur, est censé en éviter tout mouvement intempestif, même lors de chocs sur la montre. Le couple permanent, choisi en général très largement supérieur au couple moteur, a aussi pour vocation d'empêcher toute incrémentation de plus d'un pas simultanément. Ces couples de positionnement n'assurent toutefois pas totalement le blocage intégral et l'indexation incrémentale des roues engrenées; des systèmes d'encliquetage ont par conséquent été proposés pour coopérer avec ces moteurs et améliorer les fonctionnalités de maintien et de blocage, comme par exemple dans le document de brevet
Désormais d'autres types de moteurs pas-à-pas sont disponibles, par exemple le micromoteur électromécanique décrit dans le document
Un but de la présente invention est de proposer un nouveau mécanisme qui assure le blocage dans des positions d'indexations stables, et empêche parallèlement toute incrémentation d'une roue engrenée de plus d'une unité simultanément.An object of the present invention is to provide a new mechanism which locks in stable indexing positions, and simultaneously prevents incrementation of an interlocked wheel by more than one unit simultaneously.
Un autre but de la présente invention est de proposer un mécanisme de blocage pouvant s'appliquer à tout type de moteur pas-à-pas, et pas uniquement à un moteur de type « LAVET ».Another object of the present invention is to propose a locking mechanism that can be applied to any type of stepper motor, and not only to a "LAVET" type motor.
Ces buts sont atteints notamment grâce à un dispositif pour le blocage et l'incrémentation unitaire d'un module d'entraînement 1 pour rouage horloger, comprenant un actionneur 2 muni d'un cliquet actif 5 coopérant avec une roue dentée 7. Le dispositif comprend un premier 8 et un deuxième doigt 9 coopérant avec la roue dentée 7, et est caractérisé en ce que:
- le
premier doigt 8 bloque intégralement la rotation de ladite roue dentée 7 lorsqu'il est engagé dans une des dents de ladite roue dentée 7; et que - le
deuxième doigt 9 est disposé entre une première 10 et unedeuxième butée 11, l'espacement entre lesbutées 10,11limitant la course angulaire de la roue dentée 7 lorsque leditdeuxième doigt 9 est engagé dans une des dents de ladite roue dentée 7.
- the
first finger 8 completely blocks the rotation of saidtoothed wheel 7 when engaged in one of the teeth of saidtoothed wheel 7; and - the
second finger 9 is disposed between a first 10 and asecond stop 11, the spacing between thestops 10,11limiting the angular travel of thetoothed wheel 7 when saidsecond finger 9 is engaged in one of the teeth of saidtoothed wheel 7.
Ces buts sont également atteints par une méthode de blocage utilisant le dispositif selon la revendication principale et comprenant des étapes de:
- (A) Abaissement du
premier doigt 8 et dégagement de la roue dentée (7); - (B) Entraînement de la roue dentée 7 en rotation par ledit cliquet actif (5) dudit
actionneur 2; - (C) Relèvement du
premier doigt 8 et engagement dans l'une des dents de la roue dentée 7; - (D) Dégagement et retour dudit cliquet actif 5 de l'actionneur 2;
- (E) Dégagement et retour du deuxième doigt contre la
première butée 10; - (F) Relèvement du
deuxième doigt 9 et engagement dans l'une des dents de ladite roue dentée 7.
- (A) Lowering the
first finger 8 and disengaging the toothed wheel (7); - (B) Driving the
toothed wheel 7 in rotation by said active pawl (5) of saidactuator 2; - (C) Raising the
first finger 8 and engaging in one of the teeth of thetoothed wheel 7; - (D) Release and return of said
active pawl 5 of theactuator 2; - (E) Release and return of the second finger against the
first stop 10; - (F) Bearing of the
second finger 9 and engagement in one of the teeth of saidtoothed wheel 7.
Un avantage de la solution proposée est d'être applicable ou associée à tout type de moteur pas-à-pas, incluant par exemple des organes réglants pour montres mécaniques, et potentiellement tout type de module d'entraînement horloger.An advantage of the proposed solution is to be applicable or associated with any type of stepper motor, including for example regulating devices for mechanical watches, and potentially any type of clock training module.
Un autre avantage de la solution proposée est de ne plus requérir d'aimants permanents pour stabiliser le positionnement au repos des rouages entraînés par le moteur.Another advantage of the proposed solution is to no longer require permanent magnets to stabilize the rest position of the workings driven by the engine.
Un avantage additionnel de la solution proposée est de dispenser un moteur pas-à-pas électromécanique de cliquets passifs pour empêcher la rotation du rotor dans le sens inverse lors du retour de l'actionneur durant ses oscillations.An additional advantage of the proposed solution is to provide an electromechanical stepper motor passive pawls to prevent the rotation of the rotor in the opposite direction during the return of the actuator during its oscillations.
Par ailleurs, la solution proposée pour le blocage se distingue fondamentalement du système de blocage appliqué au moteur Lavet en ce que la consommation énergétique requise n'est pas liée à la valeur du couple maximum du moteur. Un avantage important de la solution proposée est par conséquent que la consommation énergétique du système de blocage est potentiellement nettement inférieure à celle du moteur lui-même.Furthermore, the proposed solution for the blocking fundamentally differs from the locking system applied to the Lavet engine in that the energy consumption required is not related to the value of the maximum torque of the engine. An important advantage of the proposed solution is therefore that the energy consumption of the locking system is potentially significantly lower than that of the engine itself.
Des exemples de mise en oeuvre de l'invention sont indiqués dans la description et illustrée par les figures annexées dans lesquelles :
- La
figure 1 illustre une vue de dessus d'un moteur pas-à-pas connu de l'art antérieur et qui sera préférentiellement associé au mécanisme de blocage selon l'invention; - La
figure 1 bis illustre une vue en coupe, selon le plan du moteur, du détail de l'actionnement de la roue dentée du rotor avec les cliquets actifs et passifs; - La
figure 2 illustre une vue en coupe d'un dispositif de blocage selon un mode de réalisation préférentiel de l'invention, au repos avant un pas du moteur; - La
figure 3 illustre une vue en coupe d'un dispositif de blocage selon un mode de réalisation préférentiel de l'invention durant l'étape d'abaissement du premier doigt de blocage; - La
figure 4 illustre une vue en coupe d'un dispositif de blocage selon un mode de réalisation préférentiel de l'invention durant un pas du moteur; - La
figure 5 illustre une vue en coupe d'un dispositif de blocage selon un mode de réalisation préférentiel de l'invention lors de la butée du deuxième doigt de blocage; - La
figure 6 illustre une vue en coupe d'un dispositif de blocage selon un mode de réalisation préférentiel de l'invention après le relèvement du premier doigt de blocage et durant le retour de l'actionneur et du deuxième doigt de blocage; - La
figure 7 illustre une vue en coupe d'un dispositif de blocage selon un mode de réalisation préférentiel de l'invention au repos à la fin d'un pas du moteur; - La
figure 8 illustre un diagramme d'état synthétisant les différents états du dispositif de blocage et les étapes d'un mode de réalisation préférentiel de la méthode de blocage selon l'invention.
- The
figure 1 illustrates a top view of a step-by-step motor known from the prior art and which will preferably be associated with the locking mechanism according to the invention; - The
figure 1 bis illustrates a sectional view, according to the plane of the motor, of the detail of the actuation of the toothed wheel of the rotor with the active and passive pawls; - The
figure 2 illustrates a sectional view of a locking device according to a preferred embodiment of the invention, at rest before a motor pitch; - The
figure 3 illustrates a sectional view of a locking device according to a preferred embodiment of the invention during the step of lowering the first locking finger; - The
figure 4 illustrates a sectional view of a locking device according to a preferred embodiment of the invention during a pitch of the engine; - The
figure 5 illustrates a sectional view of a locking device according to a preferred embodiment of the invention during the abutment of the second locking finger; - The
figure 6 illustrates a sectional view of a locking device according to a preferred embodiment of the invention after raising the first locking finger and during the return of the actuator and the second locking finger; - The
figure 7 illustrates a sectional view of a locking device according to a preferred embodiment of the invention at rest at the end of a motor pitch; - The
figure 8 illustrates a state diagram summarizing the different states of the blocking device and the steps of a preferred embodiment of the blocking method according to the invention.
La
Sur la
La
Les
La
La
La
La
La
La
La comparaison des étapes décrites à l'aide des différentes figures permet de constater que, selon le mode de réalisation préférentiel du mécanisme de blocage décrit, le premier doigt 8 possède un degré de liberté en translation, verticalement selon les figures, pour être élevé ou abaissé, et ainsi engagé ou dégagé dans l'une des dents de la roue dentée 7, et que le deuxième doigt 9 possède ce même degré de liberté en translation, ainsi qu'un degré de liberté en translation additionnel entre les butées 10 et 11, horizontal selon les figures, et qui correspond à la direction des oscillations 4 du cliquet actif 5 ainsi qu'à la tangente à la roue dentée 7 au niveau de l'engrenage avec le doigt 9. On pourra toutefois constater qu'aucune corrélation n'est nécessaire entre les degrés de liberté des deux doigts de blocage 8,9 pour garantir le bon fonctionnement de l'invention, ni la direction du mouvement des translations qui ne sont pas nécessairement verticales et respectivement horizontales. Par ailleurs, il a déjà été précisé plus haut que le degré de liberté pour engager et dégager les dents pourrait aussi être, aussi bien pour le premier doigt 8 que le deuxième doigt 9, non pas en translation mais potentiellement en rotation. Toutes les combinaisons entre les degrés de liberté et le type de liberté de chaque doigt 8,9 sont possibles dans le cadre de l'invention.The comparison of the steps described with the help of the various figures makes it possible to observe that, according to the preferred embodiment of the locking mechanism described, the
Sur la
La séquence des mouvements des doigts 8,9 suit les étapes mentionnées précédemment et qui sont synthétisées dans le diagramme d'état de la
- 1er chiffre: à l'état du
premier doigt 8 ; 0 = baissé, 1= levé; - 2e chiffre: à l'état du deuxième doigt 9; 0 = baissé, 1 = levé;
- 3e chiffre : au positionnement du deuxième doigt 9; 0 = contre la première butée 10; 1 = contre la deuxième butée 11.
- 1st digit: in the state of the
first finger 8; 0 = lowered, 1 = raised; - 2nd digit: in the state of the
second finger 9; 0 = lowered, 1 = raised; - 3rd digit: the positioning of the
second finger 9; 0 = against thefirst stop 10; 1 = against thesecond stop 11.
L'abaissement du premier doigt 8 après son dégagement de ladite roue dentée 7 correspond à une première étape A faisant passer de l'état 110 stable du système « au repos »; à un état 010 dans lequel la rotation de la roue dentée est possible.The lowering of the
L'entraînement de la roue dentée 7 en rotation par le cliquet actif 5 de l'actionneur 2 correspond à une deuxième étape B, qui entraîne le mouvement du deuxième doigt de blocage 9 de la butée 10 selon l'état 010 du système, vers l'autre butée 11, qui bloque la course de la roue dentée plus avant et amène alors le système dans l'état 011.The driving of the
Le relèvement dudit premier doigt 8, le conduisant à être engagé dans l'une des dents de la roue dentée 7 pour la bloquer à nouveau complètement, constitue une troisième étape C, faisant passer le système de l'état 011 à un état 111 stable.The raising of said
L'étape D de dégagement et de retour du cliquet actif 5 de l'actionneur 2 ne modifie pas l'état du système de blocage; toutefois l'étape E correspondante de dégagement et retour du deuxième doigt contre la première butée 10 peut être scindée en deux sous-étapes E1, d'abaissement du deuxième doigt amenant le système de l'état 111 à l'état 101, et E2, amenant le système de l'état 101 à 100. Selon une variante d'implémentation préférentielle de la méthode de blocage, les étapes D et E de dégagement et retour du cliquet actifs 5 et du deuxième doigt 9 ont lieu simultanément.Step D of disengagement and return of the
Enfin, l'étape F de relèvement du deuxième doigt 9 qui le conduit à l'engager dans l'une des dents de la roue dentée 7 ramène le système à l'état initial 110 dit « de repos » et termine ainsi le cycle d'incrémentation d'un pas du moteur.Finally, the step F of raising the
Le séquencement décrit, qui garantit que toujours qu'au moins un des deux doigts est engagé dans une des dents, permet soit de maintenir le dispositif de blocage dans un état « stable », i.e. dans lequel la roue dentée est immobilisée totalement (cas du premier doigt engagé dans la denture de la roue 7), soit dans un état « borné », i.e. dans lequel la course de la roue dentée est limitée (cas du deuxième doigt 9 engagé dans la denture de la roue 7). L'obtention d'états stables selon l'invention ne nécessite donc plus l'usage d'aimants pour appliquer des couples de positionnement au repos; par ailleurs, le premier doigt dispense de l'usage d'un cliquet passif dont l'usinage est plus complexe et le coût par conséquent plus onéreux. Par conséquent, la solution proposée diminue le coût total du dispositif de blocage tout en améliorant ses fonctionnalités puisque désormais la course angulaire de la roue dentée est toujours bornée. L'homme du métier pourra du reste constater que la manière d'actionner les cliquets 5 engrenant la roue dentée est totalement transparente pour le dispositif et la méthode de blocage décrits, de telle sorte qu'il s'applique aussi bien à des rouages horlogers électromécaniques que purement mécaniques.The sequencing described, which ensures that always at least one of the two fingers is engaged in one of the teeth, allows either to maintain the locking device in a "stable" state, ie in which the toothed wheel is completely immobilized (case of first finger engaged in the toothing of the wheel 7), either in a "bounded" state, ie in which the travel of the toothed wheel is limited (in the case of the
Selon le mode de réalisation préférentiel illustré par la
Par ailleurs, bien que les actionneurs des doigts sont, selon une variante préférentielle de l'invention, électrostatiques dans le cadre d'une implémentation d'un dispositif de blocage pour micromoteur destiné à des montres bracelets, on pourra aussi imaginer utiliser des actionneurs hydrauliques pour d'autres applications horlogères. De même, la forme des dents en biseau illustrée selon les figures décrites et qui tend à faire tourner la roue dentée dans les sens inverse des aiguilles d'une montre pourrait être modifiée par une forme similaire dans l'autre sens ou par exemple en créneau afin d'assurer le blocage total de la roue même en cas de choc. En effet, une telle forme en créneau (non représentée) rendrait impossible le dégagement de la dent sous l'action de forces extérieures au système, grâce à la coopération avec une forme en créneau identique mais inverse correspondante pour l'extrémité des doigts de blocage 8,9. La forme de dents illustrée sur les figures est toutefois adaptée pour engrener des roues dentées dans le sens des aiguilles d'une montre, et permet donc une association aisée à rouage d'affichage à aiguilles par exemple.Furthermore, although the finger actuators are, according to a preferred embodiment of the invention, electrostatic in the context of an implementation of a micromotor locking device for wristwatches, it is also possible to imagine using hydraulic actuators. for other horological applications. Similarly, the shape of the bevel teeth illustrated according to the figures described and which tends to rotate the toothed wheel counterclockwise could be modified by a similar shape in the other direction or for example in niche to ensure complete blockage of the wheel even in case of impact. Indeed, such a slot form (not shown) would make it impossible to release the tooth under the action of forces external to the system, thanks to the cooperation with a shape identical but corresponding inverse slot for the end of the locking fingers 8.9. The form of teeth shown in the figures is, however, adapted to mesh cogwheels in the direction of clockwise, and thus allows an easy association with needle wheel display for example.
Claims (13)
- Device for the locking and unitary incrementation of a drive module (1) for a timepiece gear train, said module (1) including an actuator (2) fitted with an active click (5) that cooperates with a toothed wheel (7), said device including a first (8) and a second (9) finger cooperating with said toothed wheel (7), characterized in that:said first finger (8) is arranged for entirety locking the rotation of said toothed wheel (7) when said finger is engaged in one of the teeth of said toothed wheel (7); and thatsaid second finger (9) is arranged between a first (10) and a second (11) stop member, the space between said stop members (10, 11) being arranged for limiting the angular travel of said toothed wheel (7) when said second finger (9) is engaged in one of the teeth of said toothed wheel (7).
- Device according to the preceding claim, wherein the maximum angular travel of said toothed wheel (7) is one tooth of said toothed wheel (7).
- Device according to any of the preceding claims, wherein said first locking finger (8) has a degree of freedom in translation, and said second flocking finger (9) has two degrees of freedom in translation.
- Device according to any of the preceding claims, wherein said first locking finger (8) has a degree of freedom in translation along a radius of said toothed wheel (7), and said second locking finger (9) has a degree of freedom in translation along the direction (4) of the oscillations of said active click (5).
- Device according to any of the preceding claims, wherein said second finger (9) has the same degree of freedom as said first finger (8) and an additional degree of freedom.
- Device according to any of the preceding claims, wherein the teeth of said toothed wheel (7) and the end of said locking fingers (8, 9) have a notched shape.
- Device according to any of the preceding claims, wherein said fingers (8, 9) are controlled by electrostatic or hydraulic actuators (13, 14).
- Device according to any of the receding claims, including, in addition, a programmable electronic circuit for controlling the actuating signals for said fingers (8, 9).
- Device according to any of the preceding claims, including, in addition, a cam for actuating the movements of said fingers (8, 9).
- Device according to any of the preceding claims, wherein said second finger (9) is coupled to the actuator (2) of said active click (5).
- Method for the locking and unitary incrementation of a drive module (1) for a timepiece gear train using the locking device of one of the preceding claims, said method including the steps of:- (A) lowering said first finger (8) and releasing said toothed wheel (7),- (B) driving said toothed wheel (7) in rotation via said active click (5) of said actuator (2);- (C) raising said first finger (8) and engaging said finger in one of the teeth of said toothed wheel (7);- (D) releasing and returning said active click (5) of said actuator (2);- (E) releasing and returning said second finger against said first stop member (10);- (F) raising said second finger (9) and engaging said finger in one of the teeth of said toothed wheel (7).
- Method for the locking and unitary incrementation of a drive module (1) for a timepiece gear train according to claim 11, wherein said step (E) consists in a first sub-step (E1) of lowering said second finger (9) and a second sub-step (E2) of returning said second finger against said first stop member (10).
- Method according to claim 11 or 12, wherein said steps (D, E) of releasing and returning said active click (5) of said actuator (2) and of said second finger (9) are simultaneous.
Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT08166740T ATE538416T1 (en) | 2008-10-16 | 2008-10-16 | BLOCKING MECHANISM FOR A CLOCK DRIVE MODULE |
EP08166740A EP2177960B1 (en) | 2008-10-16 | 2008-10-16 | Blocking mechanism for a clock drive module |
SG200906593-9A SG161150A1 (en) | 2008-10-16 | 2009-09-30 | Locking mechanism for timepiece drive module |
KR1020090096305A KR101567607B1 (en) | 2008-10-16 | 2009-10-09 | Locking mechanism for timepiece drive module |
TW098134498A TWI454864B (en) | 2008-10-16 | 2009-10-12 | Locking mechanism for timepiece drive module |
CN2009102063926A CN101727060B (en) | 2008-10-16 | 2009-10-15 | Locking mechanism for timepiece drive module |
US12/579,601 US8259538B2 (en) | 2008-10-16 | 2009-10-15 | Locking mechanism for timepiece drive module |
JP2009239355A JP5254927B2 (en) | 2008-10-16 | 2009-10-16 | Lock mechanism for timepiece drive module |
HK10111241.2A HK1145206A1 (en) | 2008-10-16 | 2010-12-02 | Locking mechanism for timepiece drive module |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP08166740A EP2177960B1 (en) | 2008-10-16 | 2008-10-16 | Blocking mechanism for a clock drive module |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2177960A1 EP2177960A1 (en) | 2010-04-21 |
EP2177960B1 true EP2177960B1 (en) | 2011-12-21 |
Family
ID=40225282
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08166740A Active EP2177960B1 (en) | 2008-10-16 | 2008-10-16 | Blocking mechanism for a clock drive module |
Country Status (9)
Country | Link |
---|---|
US (1) | US8259538B2 (en) |
EP (1) | EP2177960B1 (en) |
JP (1) | JP5254927B2 (en) |
KR (1) | KR101567607B1 (en) |
CN (1) | CN101727060B (en) |
AT (1) | ATE538416T1 (en) |
HK (1) | HK1145206A1 (en) |
SG (1) | SG161150A1 (en) |
TW (1) | TWI454864B (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2469353A1 (en) * | 2010-12-22 | 2012-06-27 | ETA SA Manufacture Horlogère Suisse | Assembly of a part not comprising a plastic range |
FR2985721B1 (en) * | 2012-01-12 | 2017-04-07 | Silmach | PASSIVE INDEXING OF A MOBILE ELEMENT HAVING TEETH |
EP2735922A1 (en) * | 2012-11-23 | 2014-05-28 | ETA SA Manufacture Horlogère Suisse | Drive mechanism for the hands of an electro-mechanical watch, provided with a locking device |
CN104238338B (en) * | 2014-07-31 | 2017-12-12 | 厦门理工学院 | Oscillating mode traveling wave gear drive |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS53110559A (en) * | 1977-03-08 | 1978-09-27 | Citizen Watch Co Ltd | Electronic watch |
US4647218A (en) | 1985-09-16 | 1987-03-03 | Timex Corporation | Small stepping motor driven watch |
US5959376A (en) * | 1998-09-10 | 1999-09-28 | Sandia Corporation | Microelectromechanical reciprocating-tooth indexing apparatus |
US6211599B1 (en) * | 1999-08-03 | 2001-04-03 | Sandia Corporation | Microelectromechanical ratcheting apparatus |
DE02405094T1 (en) * | 2002-02-11 | 2004-05-19 | Rolex Sa | Annual calendar mechanism for clockwork |
WO2004048525A2 (en) | 2002-11-21 | 2004-06-10 | Genentech, Inc. | Therapy of non-malignant diseases or disorders with anti-erbb2 antibodies |
FR2852111B1 (en) * | 2003-03-05 | 2005-06-24 | Univ Franche Comte | CLOCK DEVICE USING MEMS TECHNOLOGY |
FR2883276B1 (en) * | 2005-03-18 | 2007-05-11 | Silmach Soc Par Actions Simpli | METHOD AND DEVICE FOR MOVING A DRIVE MEMBER USING AN ETCHED ACTUATOR MEMBER IN A SEMICONDUCTOR MATERIAL |
FR2883277B1 (en) * | 2005-03-18 | 2007-05-11 | Silmach Soc Par Actions Simpli | METHOD AND DEVICE FOR MOVING A DRIVE MEMBER USING AN ETCHED ACTUATOR MEMBER IN A SEMICONDUCTOR MATERIAL |
DE602005014495D1 (en) * | 2005-12-22 | 2009-06-25 | Montres Breguet Sa | Locking calendar clock |
EP1921520B1 (en) | 2006-11-13 | 2009-01-28 | ETA SA Manufacture Horlogère Suisse | Drive module incorporating an MEMS micromotor, manufacturing process for this module, and time piece equipped with this module |
-
2008
- 2008-10-16 AT AT08166740T patent/ATE538416T1/en active
- 2008-10-16 EP EP08166740A patent/EP2177960B1/en active Active
-
2009
- 2009-09-30 SG SG200906593-9A patent/SG161150A1/en unknown
- 2009-10-09 KR KR1020090096305A patent/KR101567607B1/en active IP Right Grant
- 2009-10-12 TW TW098134498A patent/TWI454864B/en active
- 2009-10-15 CN CN2009102063926A patent/CN101727060B/en active Active
- 2009-10-15 US US12/579,601 patent/US8259538B2/en active Active
- 2009-10-16 JP JP2009239355A patent/JP5254927B2/en active Active
-
2010
- 2010-12-02 HK HK10111241.2A patent/HK1145206A1/en unknown
Also Published As
Publication number | Publication date |
---|---|
TWI454864B (en) | 2014-10-01 |
HK1145206A1 (en) | 2011-04-08 |
US20100097900A1 (en) | 2010-04-22 |
CN101727060B (en) | 2012-06-20 |
KR20100042591A (en) | 2010-04-26 |
JP5254927B2 (en) | 2013-08-07 |
CN101727060A (en) | 2010-06-09 |
SG161150A1 (en) | 2010-05-27 |
TW201030482A (en) | 2010-08-16 |
KR101567607B1 (en) | 2015-11-09 |
US8259538B2 (en) | 2012-09-04 |
EP2177960A1 (en) | 2010-04-21 |
ATE538416T1 (en) | 2012-01-15 |
JP2010096766A (en) | 2010-04-30 |
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