EP3800512B1 - Device for on-demand display for a clock piece - Google Patents

Device for on-demand display for a clock piece Download PDF

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Publication number
EP3800512B1
EP3800512B1 EP19201122.9A EP19201122A EP3800512B1 EP 3800512 B1 EP3800512 B1 EP 3800512B1 EP 19201122 A EP19201122 A EP 19201122A EP 3800512 B1 EP3800512 B1 EP 3800512B1
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EP
European Patent Office
Prior art keywords
lever
rake
display member
display device
cam
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
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EP19201122.9A
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German (de)
French (fr)
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EP3800512A1 (en
Inventor
Didier VUILLEMIN
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Patek Philippe SA Geneve
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Patek Philippe SA Geneve
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Priority to EP19201122.9A priority Critical patent/EP3800512B1/en
Publication of EP3800512A1 publication Critical patent/EP3800512A1/en
Application granted granted Critical
Publication of EP3800512B1 publication Critical patent/EP3800512B1/en
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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
    • G04B19/00—Indicating the time by visual means
    • G04B19/02—Back-gearing arrangements between gear train and hands
    • 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
    • G04B19/00—Indicating the time by visual means
    • G04B19/06—Dials
    • G04B19/08—Geometrical arrangement of the graduations
    • G04B19/082—Geometrical arrangement of the graduations varying from the normal closed scale

Definitions

  • the invention relates to an on-demand display device for a timepiece comprising a cam arranged to be driven by the movement of the timepiece, a retrograde display member, a pinion kinematically connected to the member display, a rake arranged to mesh with the pinion so as to control the display member, elastic means arranged to return the rake and the display member towards a rest position, and a mechanism to manual control comprising a pusher and arranged to control the rake so as to allow the display member to be brought into an indication position from the rest position, the indication position being determined by the current position of drug.
  • the patent document EP 1 936 448 in particular describes a watch equipped with a device for displaying hours and minutes on demand.
  • the hour and minute hands of this watch have the particularity of remaining stationary opposite the 12 o'clock indication on the dial, as long as the display device has not been activated.
  • the wearer of the watch can cause the hours and minutes to be displayed at any time by pressing a pusher located on the left of the watch case.
  • the hour display and the minute display are implemented in parallel using two very similar mechanisms. The latter each have a snail-shaped cam. These two cams are driven from the ground of the movement respectively at the speed of one revolution in 12 hours and one revolution per hour.
  • the two display mechanisms also include two coaxial gears arranged in the center of the movement and which respectively carry the hour hand and the minute hand. They are also linked to means of reminder arranged so that each of the hands is recalled in the direction of its indication position.
  • the two display mechanisms each include a rack arranged in engagement with the coaxial pinion of the mechanism, so that the hands are slaved to the racks.
  • the latter also each include a feeler arranged to cooperate with the profile of the snail-shaped cam. It will therefore be understood that, when the display device is actuated, the positions in which the hands are respectively placed are determined by the current positions of the cams. It will also be understood that, as the rakes are connected to the return means via the needles, the return means also have the effect of lowering the feelers of the rakes against the two snail-shaped cams.
  • Each of the actuating mechanisms also includes an actuating lever controlled by the pusher.
  • Each actuating lever is under the influence of a powerful return spring which is arranged to push it back towards the rake, as long as the pusher is not actuated.
  • the pressure of the actuating levers maintains the rakes in their retracted angular positions, in which the feelers are moved away from the snail-shaped cams and the hands positioned at 12 o'clock on the dial.
  • the wearer of the watch activates the pusher, it causes the two actuating levers to tilt, so that the rakes are free to pivot, and their feelers lower against the profiles of the snail-shaped cams.
  • the snail-shaped cams are dimensioned so that the hour and minute hands come to rest in positions indicating respectively the current hour and the current minute when the rakes are in the active position.
  • on-demand time display devices like the one just described, the control of the time display takes place strictly manually.
  • the two mechanisms require the hands to follow the movements of the pusher without any delay and without any fancy.
  • the wearer of the watch exerts pressure on the pusher, it brings the hands into a position indicating the current time.
  • the current time remains displayed as long as the watch wearer keeps the pusher pressed.
  • the pusher returns to its rest position, while the hands return to rest at 12 o'clock on the dial.
  • the patent document EP 2 615 505 A1 describes a time display mechanism on demand which comprises a timing cam arranged so as to introduce a time difference between the instant when the display of the time is requested and the instant when the indicator hand actually arrives in the indication position. The return of the indicator needle to the rest position also takes place after a predetermined time interval.
  • the patent document EP 2 159 652 A1 describes a mechanism for displaying the time on demand in which it is necessary to actuate a pusher a first time to cause the time to be displayed, and it is necessary to actuate the same pusher a second time for the indicator hands to return to rest position.
  • An aim of the present invention is to remedy the disadvantages of the prior art which have just been explained.
  • the present invention achieves this goal as well as others by providing an on-demand display device which conforms to the appended claim 1.
  • the manually operated mechanism is arranged to, on the one hand, when the pusher is actuated, cause a movement of the display member against the elastic means from the rest position until a predefined position, and on the other hand, when the pusher is then released, allow the elastic means to push the display member from the predefined position towards the rest position.
  • the display member begins by moving from the rest position to the predefined position, then leaves in the opposite direction, before finally stopping in the indication position.
  • the on-demand display device comprises a stop rocker which is movable between a retracted position and an active position in which it cooperates with the cam, so that its active position is determined by the position current of the cam.
  • the stop rocker when the stop rocker is in the active position, it is arranged to interrupt the stroke of the rake when the display member returns from its predefined position towards its rest position, so that the member d
  • the display stops in its indication position.
  • the indication position is therefore determined by the active position of the stop rocker, this active position itself being determined by the current position of the cam. It will also be understood that the indication position of the display member is an intermediate position which is located between the two extreme positions constituted by the predefined position and the rest position.
  • the display device further comprises timing means arranged to switch the stop switch to retracted position so as to release the display member, so as to allow the return spring to push it back from the indication position to the rest position at a determined instant after the wearer of the coin watchmaker released the pusher. It will be understood that the presence of the timing means allows the display member to remain in the indication position for a certain time even though the wearer has already released the pusher.
  • THE figures 1 to 6 are six plan views schematically showing the same time display device on demand, at six successive times during its operation.
  • the display device shown conforms to an exemplary embodiment of the invention, and it is intended to be integrated into a wristwatch (not shown).
  • the on-demand display device shown comprises a retrograde hand 5 which is arranged to cooperate with a scale graduated from 1 to 12 to indicate the hours (the scale is generally referenced 7) .
  • the figures also show a cam 3 in the form of a spiral with twelve steps, which is arranged to be driven by the movement (not shown) of the timepiece at the rate of one revolution in twelve hours.
  • a three-arm lever 9 which is part of a manually operated mechanism which also includes a pusher (not shown).
  • Lever 9 is pivotally mounted on an axis 10, so as to be able to selectively occupy an active position ( figure 2 ) when the wearer of the watch presses the pusher, and a rest position ( figures 1 And 3 to 6 ) when the wearer releases the pusher.
  • a return spring (referenced a) is also provided to bias lever 9 towards its rest position.
  • a rake 11 which is arranged to pivot around an axis 12 and which is kinematically connected to the retrograde needle 5 via a cog formed of a first toothed mobile 15, a intermediate mobile comprising a wheel 19 and a pinion 21, and finally a wheel 13 which carries the needle 5 in the coaxial position.
  • the rake 11 also includes a control arm 17 which is arranged to cooperate with one of the three arms of the lever 9 so that the rake 11 is caused to pivot counterclockwise when the wearer of the watch activates the pusher (not shown) .
  • the figures also show a stop lever 23 which is pivotally mounted on an axis 24 and which comprises a first arm ending in a beak (or feeler) 25 arranged to cooperate with the cam, or hour cochlea, 3 and a second arm 27 arranged to cooperate with the rake 11.
  • the stop rocker is arranged to pivot between a retracted position (illustrated in the figures 1 And 6 ) in which the feeler is kept away from the hour cochlea, and an active, or reading, position (illustrated in the figures 2 to 5 ) in which the feeler 25 cooperates with the cochlea 3.
  • a locking rocker 29 pivotally mounted on an axis 30, a locking lever 35 carrying a beak 37, and an unlocking mobile 41 which has the shape of a disc fitted with a finger 43.
  • the unlocking mobile is arranged to be rotated by the movement.
  • the locking rocker 29 is intended to selectively occupy a locked position (illustrated in the figures 1 And 6 ) and an unlocked position (shown in the figures 2 to 5 ).
  • the locking lever 29 further comprises a stop catch 33 which is arranged to cooperate with the nose 37 of the blocking lever 35 so as to retain the locking lever 29 in the unlocked position.
  • the unlocking mobile 41 is arranged to be driven at a speed of one revolution per minute (counterclockwise). Once per revolution, the finger 43 of the unlocking mobile pushes the blocking lever 25 so as to release the nose 37 of the catch 33 of the locking lever.
  • the device illustrated in the figures has a number of return springs which are only shown in the figure 1 .
  • the five springs illustrated (and referenced respectively a , b, c, d and e) are each represented by a pictogram schematically reproducing the shape of a leaf spring. It will be understood, however, that these springs are not necessarily of the leaf spring type, but can be of any type that those skilled in the art deem appropriate.
  • a first return spring referenced a (already mentioned) is arranged so as to bias the lever 9 with three arms in a counterclockwise direction so as to return it to its rest position against the pusher (not shown), that a second return spring, referenced b, is arranged so as to return the rake 11 in a clockwise direction, that a third return spring, referenced c, is arranged so as to return the rocker stop 23 in the clockwise direction towards its reading position, that a fourth return spring, referenced d, is arranged so as to return the locking rocker 29 in the clockwise direction towards its locked position, and that a fifth return spring, referenced e (already mentioned), is arranged so as to return the nose 37 of the locking lever 35 towards the locking rocker 29.
  • FIG. 1 illustrates the display device at rest.
  • the pusher (no shown) is not actuated and the three-arm lever 9 is held in its rest position by the first return spring a.
  • the lever 9 does not interact with the control arm 17 of the rake 11.
  • the second return spring b keeps the rake 11 completely rotated in the clockwise direction, and we can see that the retrograde hand 5 is immobilized in an off-scale position which is located beyond the indication “12” corresponding to the maximum value of the scale 7 in an arc of a circle. It will be understood that this position which gives no time indication is the “rest” position of the hand 5.
  • the lever 9 does not interact with the locking rocker 29 either. Under these conditions, the locking rocker is held in its locked position by the fourth return spring d. It can be seen that in the locked position, the beak 31 of the locking lever 29 retains the stop lever 23 in its retracted position, the feeler 25 then being held away from the hour snail 3. It will be noted that the return spring d is chosen more powerful than the return spring c, so that it has the necessary force to maintain the stop lever 23 in the retracted position.
  • the manually operated mechanism is arranged to cause a movement of the display member against the elastic means, from the rest position to a predefined position when the pusher (not shown) is activated.
  • the pusher (not shown) is activated.
  • the actuation of the pusher caused the pivoting of the lever 9 with three arms in the clockwise direction against the spring a.
  • the control arm 17 of the rake 11 By pivoting, one of the arms of the lever 9 pushed back the control arm 17 of the rake 11, so that the latter pivoted counterclockwise (in other words, against the return spring b), and that the retrograde hand 5 is now immobilized in an off-scale position which precedes the indication “1” corresponding to the minimum value of the fixed scale 7. It will be understood that this position which gives no time indication is the “predefined position” of the needle 5.
  • the manually operated mechanism is arranged to allow the elastic means to push the display member from the predefined position towards the rest position when the pusher (not shown) is released.
  • FIG 3 illustrates the device for displaying the time on demand following the release of the pusher (not shown). It can be seen that, under the action of the first return spring a, the three-arm lever 9 has returned to its rest position by pushing back the pusher. As already explained, when the lever 9 is in its rest position, it interacts neither with the rake 11 nor with the locking rocker 29. It will be understood, however, that the cooperation of the beak 37 of the locking lever 35 with the notch stop 33 of the locking rocker 29 prevents the fourth return spring d from pushing the rocker 29 clockwise.
  • the locking rocker is retained in its unlocked position and the stop rocker 23 is free to remain in the active position.
  • the rake 11 pivoted clockwise under the impulse of the return spring b. By pivoting, the rake 11 drove the retrograde needle 5 which also pivoted clockwise.
  • the stop rocker when the stop rocker is in the active position, it is arranged to obstruct the movement of the rake when the display member returns from its predefined position towards its position of rest, so that the display member stops in the indication position, the indication position of the display member thus being determined by the active position of the stop rocker.
  • the second arm 27 of the stop rocker 23 which is arranged to be on the trajectory of the rake 11 when the stop rocker is in the active position. In other words, it is the second arm 27 which stops the pivoting of the rake 11 in the clockwise direction.
  • the exact position in which the needle 5 comes to rest, when the rake 11 abuts against the second arm 27 of the stop rocker 23, is determined by the inclination of the stop rocker. Furthermore, as the stop rocker is in the active position, the feeler 25 is supported against the profile of the hour snail 3, so that it is the current position of the latter which determines the inclination of the rocker stop.
  • the ratio between the lengths of the arms of the stop rocker 23, as well as the profile of the side of the rake 11, are chosen so that the indication position in which the retrograde needle 5 stops, when the rake 11 abuts against the second arm 27, corresponds to the time to be displayed.
  • the needle 5 then remains in its indication position until the locking lever 35 is actuated so as to release the nozzle 37 from the stop notch 33.
  • the on-demand display device further comprises timing means arranged to, at a determined instant after the wearer of the timepiece has released the pusher, switch the stop toggle to retracted position so as to release the display member, so as to allow the elastic means to push the display member from the indication position to the rest position.
  • the timing means comprise an unlocking mobile which is rotated by the movement. As shown in the figures 4 to 6 , once per revolution of the unlocking mobile 41, the finger 43 pushes the blocking lever 35 so as to make it pivot around its axis 39 against the fifth return spring e. This movement has the effect to release the nozzle 37 from the catch 33.
  • the Figure 4 shows the finger 43 at the moment when it comes into contact with the locking lever 35.
  • the Figure 5 shows the situation a few seconds later. It can be seen that by turning, the finger 43 has forced the locking lever 35 to tilt, so that its nose 37 is now clear of the stop 33 of the locking lever 29, the latter now being free to pivot . It will be understood, however, that at the moment illustrated in the Figure 5 , the return spring d has not yet had time to bring the rocker 29 into the locked position.
  • FIG. 6 illustrates the display device at the next moment. It can be seen that the locking rocker 29 has pivoted clockwise under the action of the spring d and that it has thus passed into the locked position. The pivoting of the locking rocker caused the nose 31 to lift the stop rocker 23, so that the latter pivoted counterclockwise against the return spring c. In accordance with what has already been explained in relation to the figure 1 , the nozzle 31 now retains the stop lever 23 in its retracted position, and the feeler 25 is therefore away from the hour snail 3. The passage of the stop lever 23 in the retracted position also led to its second arm 27 to move away from the trajectory of the rake 11 which is now free to pivot.
  • the retrograde needle 5 was kinematically connected to the rake via a gear train. Under these conditions, the rake 11 and the retrograde needle 5 no longer being blocked in the indication position, the retrograde needle 5 has returned to the rest position under the action of the second return spring b .

Description

L'invention concerne un dispositif d'affichage à la demande pour pièce d'horlogerie comportant une came agencée pour être entraînée par le mouvement de la pièce d'horlogerie, un organe d'affichage rétrograde, un pignon relié cinématiquement à l'organe d'affichage, un râteau agencé pour engrener avec le pignon de manière à commander l'organe d'affichage, des moyens élastiques agencés pour rappeler le râteau et l'organe d'affichage en direction d'une position de repos, et un mécanisme à commande manuelle comportant un poussoir et agencé pour commander le râteau de manière à permettre d'amener l'organe d'affichage dans une position d'indication à partir de la position de repos, la position d'indication étant déterminée par la position courante de la came.The invention relates to an on-demand display device for a timepiece comprising a cam arranged to be driven by the movement of the timepiece, a retrograde display member, a pinion kinematically connected to the member display, a rake arranged to mesh with the pinion so as to control the display member, elastic means arranged to return the rake and the display member towards a rest position, and a mechanism to manual control comprising a pusher and arranged to control the rake so as to allow the display member to be brought into an indication position from the rest position, the indication position being determined by the current position of drug.

ART ANTERIEURPRIOR ART

On connait des dispositifs d'affichages qui correspondent à la définition ci-dessus. Le document de brevet EP 1 936 448 notamment décrit une montre équipée d'un dispositif d'affichage à la demande des heures et des minutes. Les aiguilles des heures et des minutes de cette montre présentent la particularité de demeurer immobiles en regard de l'indication 12 heures du cadran, tant qu'on n'a pas actionné le dispositif d'affichage. Le porteur de la montre peut provoquer l'affichage des heures et des minutes à tout instant en pressant sur un poussoir situé sur la gauche de la boîte de montre. L'affichage des heures et l'affichage des minutes sont mis en oeuvre en parallèle à l'aide de deux mécanismes tout à fait similaires. Ces derniers comportent chacun une came en forme de limaçon. Ces deux cames sont entraînées à partir de la chaussée du mouvement respectivement à la vitesse d'un tour en 12 heures et d'un tour par heure. Les deux mécanismes d'affichage comportent également deux pignons coaxiaux agencés au centre du mouvement et qui portent respectivement l'aiguille des heures et l'aiguille des minutes. Ils sont en outre reliés à des moyens de rappel agencés de manière que chacune des aiguilles est rappelée en direction de sa position d'indication. Les deux mécanismes d'affichage comportent chacun un râteau agencé en prise avec le pignon coaxial du mécanisme, de sorte que les aiguilles sont asservies aux râteaux. Ces derniers comportent en outre chacun un palpeur agencé pour coopérer avec le profil de la came en forme de limaçon. On comprendra donc que, lorsque le dispositif d'affichage est actionné, les positions dans lesquelles les aiguilles viennent respectivement se placer sont déterminées par les positions courantes des cames. On comprendra en outre que, comme les râteaux sont reliés aux moyens de rappel par l'intermédiaire des aiguilles, Les moyens de rappel ont également pour effet d'abaisser les palpeurs des râteaux contre les deux cames en forme de limaçon.We know of display devices which correspond to the definition above. The patent document EP 1 936 448 in particular describes a watch equipped with a device for displaying hours and minutes on demand. The hour and minute hands of this watch have the particularity of remaining stationary opposite the 12 o'clock indication on the dial, as long as the display device has not been activated. The wearer of the watch can cause the hours and minutes to be displayed at any time by pressing a pusher located on the left of the watch case. The hour display and the minute display are implemented in parallel using two very similar mechanisms. The latter each have a snail-shaped cam. These two cams are driven from the ground of the movement respectively at the speed of one revolution in 12 hours and one revolution per hour. The two display mechanisms also include two coaxial gears arranged in the center of the movement and which respectively carry the hour hand and the minute hand. They are also linked to means of reminder arranged so that each of the hands is recalled in the direction of its indication position. The two display mechanisms each include a rack arranged in engagement with the coaxial pinion of the mechanism, so that the hands are slaved to the racks. The latter also each include a feeler arranged to cooperate with the profile of the snail-shaped cam. It will therefore be understood that, when the display device is actuated, the positions in which the hands are respectively placed are determined by the current positions of the cams. It will also be understood that, as the rakes are connected to the return means via the needles, the return means also have the effect of lowering the feelers of the rakes against the two snail-shaped cams.

Chacun des mécanismes d'actionnement comporte encore un levier d'actionnement commandé par le poussoir. Chaque levier d'actionnement est sous l'emprise d'un ressort de rappel puissant qui est agencé pour le repousser en direction du râteau, tant que le poussoir n'est pas actionné. La pression des leviers d'actionnement maintient les râteaux dans leurs positions angulaires rétractées, dans lesquelles les palpeurs sont écartés des cames en forme de limaçon et les aiguilles positionnées à 12 heures sur le cadran. Lorsque le porteur de la montre actionne le poussoir, il provoque le basculement des deux leviers d'actionnement, de se sorte que les râteaux sont libres de pivoter, et que leurs palpeurs s'abaissent contre les profils des cames en forme de limaçon. On comprendre que les cames en forme de limaçon sont dimensionnées de manière que les aiguilles des heures et des minutes viennent s'immobiliser dans des positions indiquant respectivement l'heure courante et la minute courante lorsque les râteaux sont en position active. Enfin, dès que la pression sur le poussoir est relâchée, les bascules d'actionnement reprennent leur position initiale, ce qui contraint les râteaux à pivoter à nouveau en regagnant leurs positions angulaires rétractées.Each of the actuating mechanisms also includes an actuating lever controlled by the pusher. Each actuating lever is under the influence of a powerful return spring which is arranged to push it back towards the rake, as long as the pusher is not actuated. The pressure of the actuating levers maintains the rakes in their retracted angular positions, in which the feelers are moved away from the snail-shaped cams and the hands positioned at 12 o'clock on the dial. When the wearer of the watch activates the pusher, it causes the two actuating levers to tilt, so that the rakes are free to pivot, and their feelers lower against the profiles of the snail-shaped cams. It will be understood that the snail-shaped cams are dimensioned so that the hour and minute hands come to rest in positions indicating respectively the current hour and the current minute when the rakes are in the active position. Finally, as soon as the pressure on the pusher is released, the actuation rockers return to their initial position, which forces the rakes to pivot again, returning to their retracted angular positions.

Dans les dispositifs d'affichage de l'heure à la demande comme celui qui vient d'être décrit, la commande de l'affichage de l'heure se déroule de manière strictement manuelle. Les deux mécanismes imposent en effet aux aiguilles d'accompagner les mouvements du poussoir sans aucun retard et sans aucune fantaisie. Ainsi, lorsque le porteur de la montre exerce une pression sur le poussoir, il amène les aiguilles dans une position indiquant l'heure courante. L'heure courante reste affichée tant que le porteur de la montre maintient le poussoir enfoncé. Ensuite, lorsqu'il relâche le poussoir, ce dernier reprend sa position de repos, alors que les aiguilles reviennent s'immobiliser à 12 heures sur le cadran. On peut penser que l'affichage de l'heure à la demande serait visuellement plus intéressant si le mécanisme à commande manuelle était conçu pour faire accomplir automatiquement aux aiguilles quelque détour lorsqu'elles sont actionnées à l'aide du poussoir.In on-demand time display devices like the one just described, the control of the time display takes place strictly manually. The two mechanisms require the hands to follow the movements of the pusher without any delay and without any fancy. Thus, when the wearer of the watch exerts pressure on the pusher, it brings the hands into a position indicating the current time. The current time remains displayed as long as the watch wearer keeps the pusher pressed. Then, when he releases the pusher, it returns to its rest position, while the hands return to rest at 12 o'clock on the dial. One might think that displaying the time on demand would be visually more interesting if the manually operated mechanism were designed to automatically make the hands take some detour when they are operated using the pusher.

Le document de brevet EP 2 615 505 A1 décrit un mécanisme d'affichage de l'heure à la demande qui comporte une came de temporisation agencée de manière à introduire un décalage temporel entre l'instant où l'affichage de l'heure est demandé et l'instant où l'aiguille indicatrice arrive effectivement en position d'indication. Le retour de l'aiguille indicatrice en position de repos s'effectue également après un intervalle de temps prédéterminé.The patent document EP 2 615 505 A1 describes a time display mechanism on demand which comprises a timing cam arranged so as to introduce a time difference between the instant when the display of the time is requested and the instant when the indicator hand actually arrives in the indication position. The return of the indicator needle to the rest position also takes place after a predetermined time interval.

Le document de brevet EP 2 159 652 A1 décrit un mécanisme d'affichage de l'heure à la demande dans lequel il faut actionner un poussoir une première fois pour provoquer l'affichage de l'heure, et il faut actionner le même poussoir une seconde fois pour que les aiguilles indicatrices reviennent en position de repos.The patent document EP 2 159 652 A1 describes a mechanism for displaying the time on demand in which it is necessary to actuate a pusher a first time to cause the time to be displayed, and it is necessary to actuate the same pusher a second time for the indicator hands to return to rest position.

BREF EXPOSE DE L'INVENTIONBRIEF STATEMENT OF THE INVENTION

Un but de la présente invention est de remédier aux inconvénients de l'art antérieur qui viennent d'être expliqués. La présente invention atteint ce but ainsi que d'autres en fournissant un dispositif d'affichage à la demande qui est conforme à la revendication 1 annexée.An aim of the present invention is to remedy the disadvantages of the prior art which have just been explained. The present invention achieves this goal as well as others by providing an on-demand display device which conforms to the appended claim 1.

Conformément à l'invention, le mécanisme à commande manuelle est agencé pour d'une part, lorsque le poussoir est actionné, provoquer un déplacement de l'organe d'affichage à l'encontre des moyens élastiques de la position de repos jusqu'à une position prédéfinie, et pour d'autre part, lorsque le poussoir est ensuite relâché, permettre aux moyens élastiques de repousser l'organe d'affichage de la position prédéfinie en direction de la position de repos. Autrement dit, l'organe d'affichage commence par se déplacer de la position de repos jusqu'à la position prédéfinie, puis repart en sens inverse, avant de s'arrêter enfin en position d'indication. On comprendra que le mouvement supplémentaire associé au cheminent indirecte suivi par l'organe d'affichage constitue une forme d'animation susceptible d'attirer le regard sur l'organe d'affichage de la pièce d'horlogerie.In accordance with the invention, the manually operated mechanism is arranged to, on the one hand, when the pusher is actuated, cause a movement of the display member against the elastic means from the rest position until a predefined position, and on the other hand, when the pusher is then released, allow the elastic means to push the display member from the predefined position towards the rest position. In other words, the display member begins by moving from the rest position to the predefined position, then leaves in the opposite direction, before finally stopping in the indication position. It will be understood that the additional movement associated with the indirect path followed by the display member constitutes a form of animation capable of drawing the eye to the display member of the timepiece.

Conformément à l'invention, le dispositif d'affichage à la demande comporte une bascule d'arrêt qui est mobile entre une position rétractée et une position active dans laquelle elle coopère avec la came, de sorte que sa position active est déterminée par la position courante de la came. De plus, lorsque la bascule d'arrêt est en position active, elle est agencée pour interrompre la course du râteau quand l'organe d'affichage retourne depuis sa position prédéfinie en direction de sa position de repos, de façon que l'organe d'affichage s'immobilise dans sa position d'indication. La position d'indication est donc déterminée par la position active de la bascule d'arrêt, cette position active étant elle-même déterminée par la position courante de la came. On comprendra en outre que la position d'indication de l'organe d'affichage est une position intermédiaire qui est située entre les deux positions extrêmes constituées par la position prédéfinie et la position de repos.According to the invention, the on-demand display device comprises a stop rocker which is movable between a retracted position and an active position in which it cooperates with the cam, so that its active position is determined by the position current of the cam. In addition, when the stop rocker is in the active position, it is arranged to interrupt the stroke of the rake when the display member returns from its predefined position towards its rest position, so that the member d The display stops in its indication position. The indication position is therefore determined by the active position of the stop rocker, this active position itself being determined by the current position of the cam. It will also be understood that the indication position of the display member is an intermediate position which is located between the two extreme positions constituted by the predefined position and the rest position.

Conformément à l'invention, le dispositif d'affichage comporte en outre des moyens de temporisation agencés pour commuter la bascule d'arrêt en position rétractée de manière à libérer l'organe d'affichage, de façon à permettre au ressort de rappel de le repousser de la position d'indication jusqu'à la position de repos à un instant déterminé après que le porteur de la pièce d'horlogerie a relâché le poussoir. On comprendra que la présence des moyens de temporisation permet à l'organe d'affichage de rester en position d'indication un certain temps bien que le porteur a déjà relâché le poussoir.In accordance with the invention, the display device further comprises timing means arranged to switch the stop switch to retracted position so as to release the display member, so as to allow the return spring to push it back from the indication position to the rest position at a determined instant after the wearer of the coin watchmaker released the pusher. It will be understood that the presence of the timing means allows the display member to remain in the indication position for a certain time even though the wearer has already released the pusher.

BREVE DESCRIPTION DES FIGURESBRIEF DESCRIPTION OF THE FIGURES

D'autres caractéristiques et avantages de la présente invention apparaîtront à la lecture de la description qui va suivre, donnée uniquement à titre d'exemple non limitatif, et faite en référence aux dessins annexés dans lesquels :

  • les figures 1 à 6 sont six instantanés successifs au cours du fonctionnement d'un dispositif d'affichage à la demande conforme à un mode de réalisation particulier de l'invention.
Other characteristics and advantages of the present invention will appear on reading the description which follows, given solely by way of non-limiting example, and made with reference to the appended drawings in which:
  • THE figures 1 to 6 are six successive snapshots during the operation of an on-demand display device according to a particular embodiment of the invention.

DESCRIPTION DETAILLEE D'UN MODE DE REALISATIONDETAILED DESCRIPTION OF AN EMBODIMENT

Les figures 1 à 6 sont six vues en plan montrant de manière schématique le même dispositif d'affichage de l'heure à la demande, à six instants successifs au cours de son fonctionnement. Le dispositif d'affichage représenté est conforme à un mode de réalisation exemplaire de l'invention, et il est prévu pour être intégré dans une montre-bracelet (non représentée). En se référant aux figures, on peut voir que le dispositif d'affichage à la demande représenté comporte une aiguille rétrograde 5 qui est agencée pour coopérer avec une échelle graduée de 1 à 12 pour indiquer les heures (l'échelle est globalement référencée 7). Les figures montrent également une came 3 en forme de colimaçon à douze échelons, qui est agencée pour être entraînée par le mouvement (non représenté) de la pièce d'horlogerie au rythme d'un tour en douze heures. On peut voir encore un levier à trois bras 9 qui fait partie d'un mécanisme à commande manuelle qui comporte également un poussoir (non représenté). Le levier 9 est monté pivotant sur un axe 10, de manière à pouvoir occuper sélectivement une position active (figure 2) lorsque le porteur de la montre presse sur le poussoir, et une position de repos (figures 1 et 3 à 6) lorsque le porteur relâche le poussoir. Un ressort de rappel (référencé a) est encore prévu pour solliciter le levier 9 vers sa position de repos. On peut voir en outre un râteau 11 qui est agencé pour pivoter autour d'un axe 12 et qui est relié cinématiquement à l'aiguille rétrograde 5 par l'intermédiaire d'un rouage formé d'un premier mobile denté 15, d'un mobile intermédiaire comportant une roue 19 et un pignon 21, et enfin d'une roue 13 qui porte l'aiguille 5 en position coaxiale. Le râteau 11 comporte également un bras de commande 17 qui est agencé pour coopérer avec un des trois bras du levier 9 de sorte que le râteau 11 est amené à pivoter dans le sens antihoraire lorsque le porteur de la montre actionne le poussoir (non représenté). Les figures montrent encore une bascule d'arrêt 23 qui est montée pivotante sur un axe 24 et qui comprend un premier bras se terminant par un bec (ou palpeur) 25 agencé pour coopérer avec la came, ou limaçon des heures, 3 et un deuxième bras 27 agencé pour coopérer avec le râteau 11. La bascule d'arrêt est agencée pour pivoter entre une position rétractée (illustrée dans les figures 1 et 6) dans laquelle le palpeur est maintenu à l'écart du limaçon des heures, et une position active, ou de lecture, (illustrée dans les figures 2 à 5) dans laquelle le palpeur 25 coopère avec le limaçon 3. On peut voir enfin une bascule de verrouillage 29 montée pivotante sur un axe 30, un levier de blocage 35 portant un bec 37, et un mobile de déblocage 41 qui présente la forme d'un disque muni d'un doigt 43. Le mobile de déblocage est agencé pour être entraînée en rotation par le mouvement. La bascule de verrouillage 29 est prévue pour occuper sélectivement une position verrouillée (illustrée dans les figures 1 et 6) et une position déverrouillée (illustrée dans les figures 2 à 5). Elle comporte un bec 31 agencé pour coopérer avec la bascule d'arrêt 23, de façon à retenir la bascule d'arrêt 23 dans sa position rétractée lorsque la bascule de verrouillage 29 est elle-même en position verrouillée. On peut voir encore que le bec 37 du levier de blocage 35 est rappelé en direction de la bascule de verrouillage 29 par un ressort e. La bascule de verrouillage 29 comporte en outre un cran d'arrêt 33 qui est agencé pour coopérer avec le bec 37 du levier de blocage 35 de manière à retenir la bascule de verrouillage 29 en position déverrouillée. Enfin, dans le présent exemple, le mobile de déblocage 41 est agencé pour être entraînée à la vitesse d'un tour par minute (dans le sens antihoraire). Une fois par tour, le doigt 43 du mobile de déblocage repousse le levier de blocage 25 de façon à dégager le bec 37 du cran d'arrêt 33 de la bascule de verrouillage.THE figures 1 to 6 are six plan views schematically showing the same time display device on demand, at six successive times during its operation. The display device shown conforms to an exemplary embodiment of the invention, and it is intended to be integrated into a wristwatch (not shown). Referring to the figures, it can be seen that the on-demand display device shown comprises a retrograde hand 5 which is arranged to cooperate with a scale graduated from 1 to 12 to indicate the hours (the scale is generally referenced 7) . The figures also show a cam 3 in the form of a spiral with twelve steps, which is arranged to be driven by the movement (not shown) of the timepiece at the rate of one revolution in twelve hours. We can also see a three-arm lever 9 which is part of a manually operated mechanism which also includes a pusher (not shown). Lever 9 is pivotally mounted on an axis 10, so as to be able to selectively occupy an active position ( figure 2 ) when the wearer of the watch presses the pusher, and a rest position ( figures 1 And 3 to 6 ) when the wearer releases the pusher. A return spring (referenced a) is also provided to bias lever 9 towards its rest position. We can further see a rake 11 which is arranged to pivot around an axis 12 and which is kinematically connected to the retrograde needle 5 via a cog formed of a first toothed mobile 15, a intermediate mobile comprising a wheel 19 and a pinion 21, and finally a wheel 13 which carries the needle 5 in the coaxial position. The rake 11 also includes a control arm 17 which is arranged to cooperate with one of the three arms of the lever 9 so that the rake 11 is caused to pivot counterclockwise when the wearer of the watch activates the pusher (not shown) . The figures also show a stop lever 23 which is pivotally mounted on an axis 24 and which comprises a first arm ending in a beak (or feeler) 25 arranged to cooperate with the cam, or hour cochlea, 3 and a second arm 27 arranged to cooperate with the rake 11. The stop rocker is arranged to pivot between a retracted position (illustrated in the figures 1 And 6 ) in which the feeler is kept away from the hour cochlea, and an active, or reading, position (illustrated in the figures 2 to 5 ) in which the feeler 25 cooperates with the cochlea 3. We can finally see a locking rocker 29 pivotally mounted on an axis 30, a locking lever 35 carrying a beak 37, and an unlocking mobile 41 which has the shape of a disc fitted with a finger 43. The unlocking mobile is arranged to be rotated by the movement. The locking rocker 29 is intended to selectively occupy a locked position (illustrated in the figures 1 And 6 ) and an unlocked position (shown in the figures 2 to 5 ). It comprises a nose 31 arranged to cooperate with the stop lever 23, so as to retain the stop lever 23 in its retracted position when the locking lever 29 is itself in the locked position. We can still see that the nozzle 37 of the locking lever 35 is recalled in the direction of the locking rocker 29 by a spring e. The locking lever 29 further comprises a stop catch 33 which is arranged to cooperate with the nose 37 of the blocking lever 35 so as to retain the locking lever 29 in the unlocked position. Finally, in the present example, the unlocking mobile 41 is arranged to be driven at a speed of one revolution per minute (counterclockwise). Once per revolution, the finger 43 of the unlocking mobile pushes the blocking lever 25 so as to release the nose 37 of the catch 33 of the locking lever.

Comme déjà mentionné, le dispositif illustré dans les figures comporte un certain nombre de ressorts de rappel qui sont uniquement montrés dans la figure 1. Les cinq ressorts illustrés (et référencés respectivement a, b, c, d et e) sont représentés chacun par un pictogramme reproduisant de manière schématisée la forme d'un ressort-lame. On comprendra toutefois que ces ressorts ne sont pas nécessairement du type ressort-lame, mais peuvent être de tout type que l'homme du métier jugera adéquat. En se référant à la figure 1, on peut voir qu'un premier ressort de rappel, référencé a (déjà mentionné), est agencé de manière à solliciter le levier 9 à trois bras dans le sens antihoraire de façon à le rappeler dans sa position de repos à l'encontre du poussoir (non représenté), qu'un deuxième ressort de rappel, référencé b, est agencé de manière à rappeler le râteau 11 dans le sens horaire, qu'un troisième ressort de rappel, référencé c, est agencé de manière à rappeler la bascule d'arrêt 23 dans le sens horaire en direction de sa position de lecture, qu'un quatrième ressort de rappel, référencé d, est agencé de manière à rappeler la bascule de verrouillage 29 dans le sens horaire en direction de sa position verrouillée, et qu'un cinquième ressort de rappel, référencé e (déjà mentionné), est agencé de manière à rappeler le bec 37 du levier de blocage 35 en direction de la bascule de verrouillage 29.As already mentioned, the device illustrated in the figures has a number of return springs which are only shown in the figure 1 . The five springs illustrated (and referenced respectively a , b, c, d and e) are each represented by a pictogram schematically reproducing the shape of a leaf spring. It will be understood, however, that these springs are not necessarily of the leaf spring type, but can be of any type that those skilled in the art deem appropriate. Referring to the figure 1 , we can see that a first return spring, referenced a (already mentioned), is arranged so as to bias the lever 9 with three arms in a counterclockwise direction so as to return it to its rest position against the pusher (not shown), that a second return spring, referenced b, is arranged so as to return the rake 11 in a clockwise direction, that a third return spring, referenced c, is arranged so as to return the rocker stop 23 in the clockwise direction towards its reading position, that a fourth return spring, referenced d, is arranged so as to return the locking rocker 29 in the clockwise direction towards its locked position, and that a fifth return spring, referenced e (already mentioned), is arranged so as to return the nose 37 of the locking lever 35 towards the locking rocker 29.

On va maintenant expliquer le fonctionnement du dispositif d'affichage à la demande illustré en se référant successivement aux différentes figures. La figure 1 illustre le dispositif d'affichage au repos. Le poussoir (non représenté) n'est pas actionné et le levier 9 à trois bras est maintenu dans sa position de repos par le premier ressort de rappel a. On remarquera qu'en position de repos, le levier 9 n'interagit pas avec le bras de commande 17 du râteau 11. Dans ces conditions, le deuxième ressort de rappel b maintient le râteau 11 complètement pivoté dans le sens horaire, et on peut voir que l'aiguille rétrograde 5 est immobilisée dans une position hors échelle qui est située au-delà delà de l'indication « 12 » correspondant à la valeur maximum de l'échelle 7 en arc de cercle. On comprendra que cette position qui ne donne aucune indication horaire est la position « de repos » de l'aiguille 5. Dans la configuration illustrée par la figure 1, le levier 9 n'interagit pas non plus avec la bascule de verrouillage 29. Dans ces conditions, la bascule de verrouillage est maintenue dans sa position verrouillée par le quatrième ressort de rappel d. On peut voir qu'en position verrouillée, le bec 31 de la bascule de verrouillage 29 retient la bascule d'arrêt 23 dans sa position rétractée, le palpeur 25 étant alors tenu écarté du limaçon des heures 3. On précisera que le ressort de rappel d est choisi plus puissant que le ressort de rappel c, de manière qu'il ait la force nécessaire pour maintenir la bascule d'arrêt 23 en position rétractée.We will now explain the operation of the on-demand display device illustrated by referring successively to the different figures. There figure 1 illustrates the display device at rest. The pusher (no shown) is not actuated and the three-arm lever 9 is held in its rest position by the first return spring a. It will be noted that in the rest position, the lever 9 does not interact with the control arm 17 of the rake 11. Under these conditions, the second return spring b keeps the rake 11 completely rotated in the clockwise direction, and we can see that the retrograde hand 5 is immobilized in an off-scale position which is located beyond the indication “12” corresponding to the maximum value of the scale 7 in an arc of a circle. It will be understood that this position which gives no time indication is the “rest” position of the hand 5. In the configuration illustrated by the figure 1 , the lever 9 does not interact with the locking rocker 29 either. Under these conditions, the locking rocker is held in its locked position by the fourth return spring d. It can be seen that in the locked position, the beak 31 of the locking lever 29 retains the stop lever 23 in its retracted position, the feeler 25 then being held away from the hour snail 3. It will be noted that the return spring d is chosen more powerful than the return spring c, so that it has the necessary force to maintain the stop lever 23 in the retracted position.

Conformément à l'invention, le mécanisme à commande manuelle est agencé pour provoquer un déplacement de l'organe d'affichage à l'encontre des moyens élastiques, de la position de repos jusqu'à une position prédéfinie lorsque le poussoir (non représenté) est actionné. En se référant maintenant à la figure 2, on peut voir que l'actionnement du poussoir a provoqué le pivotement du levier 9 à trois bras dans le sens horaire à l'encontre du ressort a. En pivotant, un des bras du levier 9 a repoussé le bras de commande 17 du râteau 11, de sorte que ce dernier a pivoté dans le sens antihoraire (autrement dit, à l'encontre du ressort de rappel b), et que l'aiguille rétrograde 5 est maintenant immobilisée dans une position hors échelle qui précède l'indication « 1 » correspondant à la valeur minimum de l'échelle fixe 7. On comprendra que cette position qui ne donne aucune indication horaire est la « position prédéfinie » de l'aiguille 5.In accordance with the invention, the manually operated mechanism is arranged to cause a movement of the display member against the elastic means, from the rest position to a predefined position when the pusher (not shown) is activated. Referring now to the figure 2 , we can see that the actuation of the pusher caused the pivoting of the lever 9 with three arms in the clockwise direction against the spring a. By pivoting, one of the arms of the lever 9 pushed back the control arm 17 of the rake 11, so that the latter pivoted counterclockwise (in other words, against the return spring b), and that the retrograde hand 5 is now immobilized in an off-scale position which precedes the indication “1” corresponding to the minimum value of the fixed scale 7. It will be understood that this position which gives no time indication is the “predefined position” of the needle 5.

En se référant toujours à la figure 2, on peut voir qu'un autre bras du levier 9 a repoussé la bascule de verrouillage 29, de sorte que cette dernière a pivoté dans le sens antihoraire à l'encontre du ressort de rappel d et se trouve maintenant en position déverrouillée. Comme le montre la figure, le bras du levier 9 à trois bras maintient la bascule de verrouillage 29 en position complètement pivotée, tant que le poussoir (non représenté) est maintenu enfoncé. La figure 2 montre en outre que suite au désengagement du bec 31 de la bascule de verrouillage 29, le ressort de rappel c a pu ramener la bascule d'arrêt 23 en position de lecture (avec le palpeur 25 en appui contre le profil du limaçon des heures 3).Always referring to the figure 2 , we can see that another arm of the lever 9 has pushed back the locking rocker 29, so that the latter has pivoted counterclockwise against the return spring d and is now in the unlocked position. As shown in the figure, the arm of the three-arm lever 9 holds the locking toggle 29 in the fully pivoted position, as long as the pusher (not shown) is held down. There figure 2 further shows that following the disengagement of the beak 31 from the locking lever 29, the return spring could return the stop lever 23 to the reading position (with the feeler 25 resting against the profile of the hour snail 3) .

Conformément à l'invention, le mécanisme à commande manuelle est agencé pour permettre aux moyens élastiques de repousser l'organe d'affichage de la position prédéfinie en direction de la position de repos lorsque le poussoir (non représenté) est relâché. La figure 3 illustre le dispositif d'affichage de l'heure à la demande suite au relâchement du poussoir (non représenté). On peut voir que, sous l'action du premier ressort de rappel a, le levier 9 à trois bras est revenu dans sa position de repos en repoussant le poussoir. Comme déjà expliqué, lorsque le levier 9 est dans sa position de repos, il n'interagit ni avec le râteau 11, ni avec la bascule de verrouillage 29. On comprendra toutefois que la coopération du bec 37 du levier de blocage 35 avec le cran d'arrêt 33 de la bascule de verrouillage 29 empêche le quatrième ressort de rappel d de repousser la bascule 29 dans le sens horaire. Ainsi, la bascule de verrouillage est retenue dans sa position déverrouillée et la bascule d'arrêt 23 est libre de rester en position active. De son côté, le râteau 11 a pivoté dans le sens horaire sous l'impulsion du ressort de rappel b. En pivotant, le râteau 11 a entraîné l'aiguille rétrograde 5 qui a pivoté dans le sens horaire également.In accordance with the invention, the manually operated mechanism is arranged to allow the elastic means to push the display member from the predefined position towards the rest position when the pusher (not shown) is released. There Figure 3 illustrates the device for displaying the time on demand following the release of the pusher (not shown). It can be seen that, under the action of the first return spring a, the three-arm lever 9 has returned to its rest position by pushing back the pusher. As already explained, when the lever 9 is in its rest position, it interacts neither with the rake 11 nor with the locking rocker 29. It will be understood, however, that the cooperation of the beak 37 of the locking lever 35 with the notch stop 33 of the locking rocker 29 prevents the fourth return spring d from pushing the rocker 29 clockwise. Thus, the locking rocker is retained in its unlocked position and the stop rocker 23 is free to remain in the active position. For its part, the rake 11 pivoted clockwise under the impulse of the return spring b. By pivoting, the rake 11 drove the retrograde needle 5 which also pivoted clockwise.

Conformément à l'invention, lorsque la bascule d'arrêt est en position active, elle est agencée pour faire obstacle à la course du râteau quand l'organe d'affichage retourne depuis sa position prédéfinie en direction de sa position de repos, de façon que l'organe d'affichage s'immobilise en position d'indication, la position d'indication de l'organe d'affichage étant ainsi déterminée par la position active de la bascule d'arrêt. En se référant toujours à la figure 3, on peut voir que c'est le deuxième bras 27 de la bascule d'arrêt 23 qui est agencé pour se trouver sur la trajectoire du râteau 11 lorsque la bascule d'arrêt est en position active. Autrement dit, c'est le deuxième bras 27 qui stoppe le pivotement du râteau 11 dans le sens horaire. On comprendra en outre que la position exacte dans laquelle l'aiguille 5 s'immobilise, lorsque le râteau 11 bute contre le deuxième bras 27 de la bascule d'arrêt 23, est déterminée par l'inclinaison de la bascule d'arrêt. De plus, comme la bascule d'arrêt est en position active, le palpeur 25 se trouve en appui contre le profil du limaçon des heures 3, de sorte que c'est la position courante de ce dernier qui détermine l'inclinaison de la bascule d'arrêt. Le rapport entre les longueurs des bras de la bascule d'arrêt 23, ainsi que le profil du flanc du râteau 11, sont choisis de manière à ce que la position d'indication dans laquelle vient s'arrêter l'aiguille rétrograde 5, lorsque le râteau 11 bute contre le deuxième bras 27, corresponde bien à l'heure à afficher. L'aiguille 5 reste ensuite dans sa position d'indication jusqu'à ce que le levier de blocage 35 soit actionné de manière à dégager le bec 37 du cran d'arrêt 33.According to the invention, when the stop rocker is in the active position, it is arranged to obstruct the movement of the rake when the display member returns from its predefined position towards its position of rest, so that the display member stops in the indication position, the indication position of the display member thus being determined by the active position of the stop rocker. Always referring to the Figure 3 , we can see that it is the second arm 27 of the stop rocker 23 which is arranged to be on the trajectory of the rake 11 when the stop rocker is in the active position. In other words, it is the second arm 27 which stops the pivoting of the rake 11 in the clockwise direction. It will also be understood that the exact position in which the needle 5 comes to rest, when the rake 11 abuts against the second arm 27 of the stop rocker 23, is determined by the inclination of the stop rocker. Furthermore, as the stop rocker is in the active position, the feeler 25 is supported against the profile of the hour snail 3, so that it is the current position of the latter which determines the inclination of the rocker stop. The ratio between the lengths of the arms of the stop rocker 23, as well as the profile of the side of the rake 11, are chosen so that the indication position in which the retrograde needle 5 stops, when the rake 11 abuts against the second arm 27, corresponds to the time to be displayed. The needle 5 then remains in its indication position until the locking lever 35 is actuated so as to release the nozzle 37 from the stop notch 33.

Conformément à l'invention, le dispositif d'affichage à la demande comporte en outre des moyens de temporisation agencés pour, à un instant déterminé après que le porteur de la pièce d'horlogerie a relâché le poussoir, commuter la bascule d'arrêt en position rétractée de manière à libérer l'organe d'affichage, de façon à permettre aux moyens élastiques de repousser l'organe d'affichage de la position d'indication jusqu'à la position de repos. Comme déjà mentionné, dans l'exemple illustré, les moyens de temporisation comportent un mobile de déblocage qui est entraînée en rotation par le mouvement. Comme le montre les figures 4 à 6, une fois par tour du mobile de déblocage 41, le doigt 43 vient repousser le levier de blocage 35 de manière à le faire pivoter autour de son axe 39 à l'encontre du cinquième ressort de rappel e. Ce mouvement a pour effet de dégager le bec 37 du cran d'arrêt 33. La figure 4 montre le doigt 43 à l'instant où il entre en contact avec le levier de blocage 35. La figure 5 montre la situation quelques secondes plus tard. On peut voir qu'en tournant, le doigt 43 a forcé le levier de blocage 35 à basculer, de sorte que son bec 37 est maintenant dégagé du cran d'arrêt 33 de la bascule de verrouillage 29, cette dernière étant maintenant libre de pivoter. On comprendra toutefois qu'à l'instant illustré dans la figure 5, le ressort de rappel d n'a pas encore eu le temps d'amener la bascule 29 en position verrouillée.In accordance with the invention, the on-demand display device further comprises timing means arranged to, at a determined instant after the wearer of the timepiece has released the pusher, switch the stop toggle to retracted position so as to release the display member, so as to allow the elastic means to push the display member from the indication position to the rest position. As already mentioned, in the example illustrated, the timing means comprise an unlocking mobile which is rotated by the movement. As shown in the figures 4 to 6 , once per revolution of the unlocking mobile 41, the finger 43 pushes the blocking lever 35 so as to make it pivot around its axis 39 against the fifth return spring e. This movement has the effect to release the nozzle 37 from the catch 33. The Figure 4 shows the finger 43 at the moment when it comes into contact with the locking lever 35. The Figure 5 shows the situation a few seconds later. It can be seen that by turning, the finger 43 has forced the locking lever 35 to tilt, so that its nose 37 is now clear of the stop 33 of the locking lever 29, the latter now being free to pivot . It will be understood, however, that at the moment illustrated in the Figure 5 , the return spring d has not yet had time to bring the rocker 29 into the locked position.

La figure 6 illustre le dispositif d'affichage à l'instant d'après. On peut voir que la bascule de verrouillage 29 a pivoté dans le sens horaire sous l'action du ressort d et qu'elle est ainsi passée en position verrouillée. Le pivotement de la bascule de verrouillage a conduit le bec 31 a soulevé la bascule d'arrêt 23, de sorte que cette dernière a pivoté dans le sens antihoraire à l'encontre du ressort de rappel c. Conformément à ce qui a déjà été expliqué en relation avec la figure 1, le bec 31 retient maintenant la bascule d'arrêt 23 dans sa position rétractée, et le palpeur 25 est donc à l'écart du limaçon des heures 3. Le passage de la bascule d'arrêt 23 en position rétractée, a également conduit son deuxième bras 27 à s'écarter de la trajectoire du râteau 11 qui est maintenant libre de pivoter. On a vu que l'aiguille rétrograde 5 étaient reliées cinématiquement au râteau par l'intermédiaire d'un rouage. Dans ces conditions, le râteau 11 et l'aiguille rétrograde 5 n'étant plus bloqués en position d'indication, l'aiguille rétrograde 5 est revenue en position de repos sous l'action du deuxième ressort de rappel b.There Figure 6 illustrates the display device at the next moment. It can be seen that the locking rocker 29 has pivoted clockwise under the action of the spring d and that it has thus passed into the locked position. The pivoting of the locking rocker caused the nose 31 to lift the stop rocker 23, so that the latter pivoted counterclockwise against the return spring c. In accordance with what has already been explained in relation to the figure 1 , the nozzle 31 now retains the stop lever 23 in its retracted position, and the feeler 25 is therefore away from the hour snail 3. The passage of the stop lever 23 in the retracted position also led to its second arm 27 to move away from the trajectory of the rake 11 which is now free to pivot. We saw that the retrograde needle 5 was kinematically connected to the rake via a gear train. Under these conditions, the rake 11 and the retrograde needle 5 no longer being blocked in the indication position, the retrograde needle 5 has returned to the rest position under the action of the second return spring b .

On comprendra en outre que diverses modifications et/ou améliorations évidentes pour un homme du métier peuvent être apportées aux modes de réalisation qui font l'objet de la présente description sans sortir du cadre de la présente invention définie par les revendications annexées.It will further be understood that various modifications and/or improvements obvious to a person skilled in the art can be made to the embodiments which are the subject of the present description without departing from the scope of the present invention defined by the appended claims.

Claims (8)

  1. On-demand display device for a timepiece comprising a cam (3) arranged to be driven by the movement of the timepiece, a retrograde display member (5), a pinion (15) kinematically connected to the display member, a rake (11) arranged to mesh with the pinion so as to control the display member, elastic means (b) arranged to return the rake (11) and the display member (5) towards an inoperative position, and a manual control mechanism (9) comprising a push-piece and arranged to control the rake (11) so as to make it possible to bring the display member (5) into an indicating position from the inoperative position, the indicating position being determined by the current position of the cam (3); wherein the manual control mechanism (9) is arranged, on the one hand, to cause a displacement of the display member (5) against the elastic means (b) from the inoperative position to a pre-defined position when the push-piece is actuated and, on the other hand, to allow the elastic means to repel the display member (5) from the pre-defined position towards the inoperative position when the push-piece is then released, the display device further comprising a stopping lever (23) which can move between a retracted position and an active position in which it cooperates with the cam (3) so that its active position is determined by the current position of the cam, the stopping lever (23) being arranged to be in the active position and to be an obstacle to the travel of the rake (11) when the display member (5) returns from its pre-defined position towards its inoperative position so that the display member is immobilised in the indicating position, the indicating position of the display member (5) being determined by the active position of the stopping lever (23), the display device further comprising count-down means (35, 37, 41, 43) arranged to switch the stopping lever (23) to the retracted position so as to release the display member (5) so as to allow the elastic means (b) to repel the display member from the indicating position to the inoperative position at a specified time after the push-piece has been released.
  2. On-demand display device as claimed in claim 1, characterised in that the rake (11) and the stopping lever (23) comprise contact zones, the profile of the contact zone of the rake being arranged to come to bear against the profile of the contact zone of the stopping lever under the action of the elastic means when the stopping lever is in the active position and the push-piece is released.
  3. On-demand display device as claimed in claim 1 or 2, characterised in that it comprises a locking lever (29) arranged to be able to selectively occupy a locked position in which it keeps the stopping lever (23) in its retracted position and an unlocked position in which the locking lever (29) is disengaged from the stopping lever (23), the locking lever being further arranged so as to be elastically returned towards the locked position.
  4. On-demand display device as claimed in claim 3, characterised in that the manual control mechanism (9) is arranged to cause the locking lever (29) to pivot from its locked position to its unlocked position when the push-piece is actuated.
  5. On-demand display device as claimed in claim 3 or 4, characterised in that it comprises a blocking lever (35) comprising a beak (37) biased against the locking lever (29) so as to make it possible to immobilise this locking lever in the unlocked position.
  6. On-demand display device as claimed in claim 5, characterised in that the count-down means (35, 37, 41, 43) comprise a release mobile (41) driven by the timepiece movement and arranged to control the blocking lever (35) so as to release the locking lever (29) at the specified time in order to allow the locking lever to toggle towards the locked position.
  7. On-demand display device as claimed in any one of the preceding claims, characterised in that the stopping lever (23) comprises a first arm ending in a feeler (25) elastically biased towards the periphery of the cam (3), the feeler (25) being arranged to cooperate with the cam when the stopping lever (23) is in the active position and to be held away from the cam when the stopping lever is in the retracted position.
  8. On-demand display device as claimed in any one of the preceding claims, characterised in that the stopping lever (23) comprises a second arm (27) arranged to be located on the trajectory of the rake (11) when the stopping lever is in the active position and to be located spaced away from the trajectory of the rake when the stopping lever is in the retracted position.
EP19201122.9A 2019-10-02 2019-10-02 Device for on-demand display for a clock piece Active EP3800512B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19201122.9A EP3800512B1 (en) 2019-10-02 2019-10-02 Device for on-demand display for a clock piece

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19201122.9A EP3800512B1 (en) 2019-10-02 2019-10-02 Device for on-demand display for a clock piece

Publications (2)

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EP3800512A1 EP3800512A1 (en) 2021-04-07
EP3800512B1 true EP3800512B1 (en) 2024-01-10

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Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SG144061A1 (en) 2006-12-23 2008-07-29 Franck Muller Watchland S A On-demand display device for a timepiece
EP2159652A1 (en) * 2008-08-26 2010-03-03 Agenhor SA Display mechanism for a timepiece used to display or not the current time
EP2615505A1 (en) * 2012-01-14 2013-07-17 Agenhor SA Mechanism for indicating on request information for a timepiece movement

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