EP3811158B1 - Alarm clock mechanism and timepiece comprising such a mechanism - Google Patents

Alarm clock mechanism and timepiece comprising such a mechanism Download PDF

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Publication number
EP3811158B1
EP3811158B1 EP19744846.7A EP19744846A EP3811158B1 EP 3811158 B1 EP3811158 B1 EP 3811158B1 EP 19744846 A EP19744846 A EP 19744846A EP 3811158 B1 EP3811158 B1 EP 3811158B1
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EP
European Patent Office
Prior art keywords
alarm clock
clock mechanism
cam
lever
lifting
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Active
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EP19744846.7A
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German (de)
French (fr)
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EP3811158A1 (en
Inventor
Pascal HUMAIR
Julien Giacobino
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Patek Philippe SA Geneve
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Patek Philippe SA Geneve
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Publication of EP3811158A1 publication Critical patent/EP3811158A1/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
    • G04B23/00—Arrangements producing acoustic signals at preselected times
    • G04B23/02—Alarm clocks
    • G04B23/025—Signal triggering
    • 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
    • G04B9/00—Supervision of the state of winding, e.g. indicating the amount of winding
    • G04B9/02—Devices controlled by such state, e.g. device affording protection means against overwinding

Definitions

  • the invention relates to a timepiece comprising an alarm mechanism in accordance with the first aspect of the invention.
  • Awakening mechanisms conforming to the definition given above are known.
  • the ringing of the alarm clock consumes a significant amount of mechanical energy.
  • the timepieces equipped with it generally have a second barrel with a mainspring exclusively dedicated to actuating the The ring.
  • the mechanical energy available is generally not sufficient to allow the alarm mechanism to strike a second time after ringing the first time, unless the user of the timepiece has wound up the striking barrel in the meantime.
  • This state of affairs can be the source of unpleasant surprises for a person who wishes to use the alarm mechanism of his timepiece. It would therefore be desirable to have an alarm mechanism with which one can be sure that there is enough energy to allow it to ring when the time comes for the entire duration desired.
  • EP 2 226 688 A1 relates to a timepiece comprising a control unit moved between positions defined by a power reserve mechanism.
  • a trigger unit i.e. a ratchet wheel, is activated to cooperate with a trigger tip to trigger an additional mechanism, which is an alarm mechanism sounding at fixed intervals (eg: every hour, every quarter hour).
  • EP 1 394 637 A1 relates to a watch mechanism comprising an alarm setting indicator and a lock control actuated by a push button through a cog pin, ratchet, wheel and comprising alarm lock and lock indicator levers with an attached display symbol.
  • An object of the present invention is to remedy the drawbacks of the prior art which have just been explained.
  • the present invention achieves this and other objects by providing an alarm mechanism according to appended claim 1.
  • Preferred embodiments of the present invention are defined in appended claims 2-11.
  • wake-up mechanism designates here any mechanism suitable for emitting acoustic signals at times chosen in advance.
  • the wake-up mechanism can be put in the activated state or in the deactivated state.
  • the striking mechanism does not trigger at the preprogrammed time, even if the mainspring is sufficiently charged to drive the striking mechanism.
  • the alarm mechanism comprises an isolator arranged to neutralize the activation function of the alarm mechanism when the degree of winding of the mainspring is less than a first predefined threshold value. Thanks to this feature, if the alarm mechanism is in the activated state, a user can be certain that the ringing will indeed occur when the cam commands the triggering of the ringing mechanism. Conversely, if the user forgets to wind the striking barrel before using the manual control mechanism to activate the wake-up mechanism, the manual control mechanism will be inoperative. When noting that he cannot activate the alarm mechanism, the user will realize that he forgot to wind the striking barrel.
  • the alarm mechanism further comprises an activation indicator member arranged to indicate whether the alarm mechanism is in the activated state or in the deactivated state.
  • an activation indicator member arranged to indicate whether the alarm mechanism is in the activated state or in the deactivated state.
  • FIG. 1 is a schematic plan view on the dial side of an alarm watch according to a particular embodiment of the invention.
  • the alarm clock shown will now be described by limiting itself to the essential aspects of the invention and leaving aside a large number of details which do not directly relate to the invention.
  • the watch of the figure 1 has a winding crown (referenced 11) which protrudes from the middle of the watch at approximately 4 o'clock.
  • the crown 11 is arranged in such a way as to allow the striking barrel to be wound up by rotating it, in the pushed back position, clockwise.
  • the winding crown 11 also allows to correct the alarm time. To shift the alarm time forwards or backwards, the crown must be turned clockwise and counterclockwise respectively after having brought the winding stem to the position for setting the alarm time.
  • the alarm time is displayed, in digital form, in two apertures (referenced 3 and 5) which are arranged side by side in the dial at 12 o'clock.
  • a first of the two apertures (referenced 3) indicates the hour in the form of an integer between 1 and 12
  • the second aperture (referenced 5) indicates the minute in the form of a two-digit number which is a multiple of 5 comprised between 00 and 55.
  • the alarm watch illustrated in the figure 1 still has a pusher (reference 13) which protrudes from the case middle at approximately 2 o'clock. This pusher is provided to make it possible to manually actuate a mechanism arranged to alternately activate and deactivate the clock mechanism of the watch.
  • this manually operated mechanism is further associated with an activation indicator member which is provided to indicate whether the alarm mechanism is in the activated state or in the deactivated state.
  • This indicator member is arranged to appear in a third small aperture of the dial (reference 7). Window 7 is set up at 12 o'clock between the first two windows 3 and 5 and the hour circle. Finally, a fourth small aperture (referenced 9) is arranged between the first two apertures 3 and 5 and the center of the dial. The indicator that appears in the small window 9 is a day/night indicator associated with the alarm time.
  • the alarm mechanism comprises a striking mechanism and a mainspring 15 ( figure 2A ) arranged to disarm by driving the striking mechanism following a triggering of the latter.
  • the mainspring which is exclusively dedicated to actuating the chime, is arranged in a barrel.
  • the barrel also drives an inertia brake provided to regulate its unwinding and therefore the frequency with which the acoustic signals are issued.
  • the gear train that connects the barrel to the inertia brake is called the “small gear train”. This type of arrangement is known as such.
  • the striking barrel of the alarm mechanism which is the subject of the present description is equipped with a stopper (reference 85). Stoppers are devices which are known to those skilled in the art as such. In a timepiece, the stop serves on the one hand to limit the number of winding revolutions of the barrel during winding, and it serves on the other hand to prevent the mainspring from disarming completely.
  • FIG 2B is a block diagram of the operation of the shutdown of the wake-up mechanism of the present example. The operating principle of the stop shown is similar to that of a traditional Maltese cross stop. However, the stop illustrated has the particularity of being staged on two levels. The arrangement on two levels has the advantage of saving space in width, while avoiding the risk of desynchronization.
  • FIG. 2B shows a disc portion 81 and a finger 83 which are both fixed on the barrel arbor (not shown in the figure 2B , but visible and referenced 79 in the figure 2A ).
  • FIG. 2B further shows a partially toothed mobile 85 at two levels which is pivotally mounted on a fixed shaft close to the barrel.
  • the first level of the mobile 85 is constituted by a star 87 which is arranged to cooperate with the finger 83
  • the second level is constituted by a cam 89 arranged to cooperate with the disc portion 81.
  • the cam 89 comprises a circular portion 91 and two concave portions 93a and 93b.
  • the direction in which the arbor 79 must be rotated to wind the barrel is clockwise, and therefore conversely, the barrel is disarmed by rotating the barrel arbor counterclockwise.
  • the angular position of the stopping mobile 85 in the figures 2A and 2B corresponds to the situation where the mainspring is fully charged.
  • disc portion 81 has a concave face, and in the illustrated configuration, stopper 85 blocks the rotation of the barrel arbor clockwise by buttressing one of the ends 81a of the concave face against one end of the circular portion 91 of the cam 89. In this configuration, the barrel is on the other hand free to disarm by driving the arbor 79 counterclockwise.
  • the mainspring When the mainspring is disarmed by driving the barrel arbor, it drives the finger 83 in rotation, so that the latter causes the star wheel 87 to advance by one step at each turn.
  • the finger 83 causes the mobile stopper 85 to pivot by 30° for each turn of the barrel arbor.
  • the stopper wheel has pivoted 60°, the mainspring having caused the barrel arbor to complete two complete turns while disarming, the latter is blocked again due, this time, to the buttressing of the end 81b of the concave face of the disc portion 81 against the other end of the circular portion 91 of the cam 89.
  • the stoppage thus prevents the barrel from disarming further.
  • the angular position of the mobile stopper 85 is a function of the degree of winding of the mainspring and that, in the example illustrated, an angle of 60° separates the position of maximum winding from the position of minimum winding.
  • the alarm clock mechanism comprises a triggering system designed to control the triggering of the ringing mechanism at a programmed time, provided that the alarm clock mechanism is activated.
  • THE Figures 3A, 3B And 3C are schematic plan views of the triggering system of the alarm mechanism of the watch of the figure 1 . The first two of these three figures illustrate the trigger system when the wake-up mechanism and in the activated state, while the third Fig. 3C illustrates the same system when the wake-up mechanism is in the disabled state. It will further be specified that the Figure 3A shows the system before triggering and the Figure 3B show it right after.
  • a lever 33 rotatably mounted on a pivot 34 and provided with a first arm arranged to cooperate with a toothed mobile 18 which forms part of the small gear train, a trigger cam 21 provided with a notch 23, and a trigger rocker 25 pivoted about an axis 27 and provided with a beak 29 which is biased against the cam 21 by a return spring 31.
  • the distal end of rocker 25 carries a pin 32 arranged to cooperate with a second arm of lever 33.
  • the first arm of the lever 33 is inserted in the toothing of a four-pointed star 19 of the mobile 18. The mobile 18 is therefore blocked so that the striking barrel cannot rotate.
  • the first arm of the lever 33 is held apart from the toothing of the star 19, so that the mobile 18 is free to rotate, the barrel then being free to disarm by driving the striking mechanism.
  • the cam 21 is connected to the going train of the watch so as to be driven to rotate counterclockwise (the cam being seen from the angle shown in the figures). In the present example, the cam 21 completes one revolution in twenty-four hours.
  • the alarm mechanism also comprises an adjustment system, which may be of a type known to those skilled in the art, and which makes it possible to adjust the angular position of the cam 21 so that the notch 23 is opposite the spout 29 at a programmed alarm time.
  • the operating principle of the striking mechanism trigger system is as follows. At the programmed wake-up time, the spout 29 suddenly drops into the notch 23, which causes the trigger rocker 25 to pivot around its axis 27 counterclockwise. Pin 32 carried by the distal end of rocker 25 then actuates lever 33, so that the latter pivots clockwise ( Figure 3B ). By thus pivoting clockwise, the lever 33 releases the star 19. The barrel is then free to rotate, driving the striking mechanism.
  • the Figures 3A, 3B And 3C also show a column wheel 41 and a control rocker 35.
  • the column wheel of the present example is double. It is more or less the back-to-back assembly of two classically designed column wheels.
  • the column wheel 41 essentially consists of a ratchet wheel 57, a first batch of six teeth or columns 59 carried on edge by the ratchet on the upper face of its board, and a second batch of six teeth or columns 59A carried on edge by the ratchet on the underside of its board (only the first batch of columns is visible in the Figures 3A, 3B And 3C ).
  • the columns have a cross section substantially in the shape of a truncated triangle.
  • the ratchet 57 comprises 12 teeth (two teeth for each column of a batch). It is indeed a two-stroke column wheel.
  • the column wheel 41 When it is not actuated, the column wheel 41 is maintained in a stable angular position by a jumper spring 58 whose end presses against the ratchet wheel.
  • the control rocker 35 for its part, is pivoted around an axis 37. It can also be seen that it is provided with a beak 39 and a pin 45.
  • the beak 39 is biased against the columns 59 of the column wheel 41 by a return spring 43, and the pin 45 is arranged to cooperate with a foot 47 with which the trigger rocker 25 is provided.
  • THE figures 3A and 3B both show the column wheel 41 oriented so as to allow the beak 39 of the rocker 35 to lower between two columns 59 under the action of the spring 43. If now the ratchet 57 of the column wheel 41 is pivoted by one step, one of the columns pushes the beak 39 so that it rises and comes to rest resting against the column ( Fig. 3C ). This movement causes the rocker 35 to pivot in the direction counterclockwise. Column wheel 41 is a two-stroke column wheel. Thus, if the column wheel is then pivoted an additional step, the column against which the beak 39 rests is released, and the beak descends again between two columns actuated by the spring 43. This movement causes the rocker 35 to pivot in the other direction, clockwise.
  • the control rocker 35 includes a pin 45 which is arranged to cooperate with a foot 47 of the trigger rocker 25.
  • the pin 45 is kept away from the path of the foot 47, and it therefore cannot hinder the pivoting of the trigger rocker 25 in one direction or the other.
  • the column wheel 41 is incremented by one step, the pivoting of the control rocker 35 in the counterclockwise direction is accompanied by a displacement of the pin 45 in the direction of the foot 47. In this new position, the pin 45 is on the trajectory of the foot 47, so that it blocks the pivoting of the trigger rocker in the counterclockwise direction.
  • the alarm mechanism is in the activated state when the rocker 35 is lowered between two columns as illustrated in the figures 3A and 3B . And conversely, the alarm mechanism is in the deactivated state when the rocker 35 is raised, the beak 39 resting against one of the columns 59 as illustrated in the Fig. 3C .
  • the wake-up mechanism which is the subject of the present description further comprises an activation indicator member arranged to indicate whether the wake-up mechanism is in the activated state or in the deactivated state.
  • the activation indicator member is controlled by rocker 35 and, as already mentioned, it is arranged to appear in a window referenced 7 ( figure 1 ).
  • the position of the column wheel 41 is incremented by one step to cause the alarm mechanism to switch from the activated state to the deactivated state while the mainspring is in the process of being disarmed following the triggering of the striking mechanism, it causes the pivoting of the rocker 35 in the counterclockwise direction as already explained in relation to the Fig. 3C .
  • the pivoting of the rocker 35 causes the pin 45 to advance in the direction of the foot 47 of the trigger rocker 25.
  • the striking mechanism having just been triggered, the rocker 25 is at this moment in the position represented in the Figure 3B , with its beak 29 lowered into the notch 23 of the trigger cam 21. In this position, the foot 47 is in the path of the pin 45.
  • the pin 45 therefore pushes back the trigger rocker 25 which thus comes into the position represented in the Fig. 3C causing the ringing to stop.
  • the wake-up mechanism comprises a manually operated mechanism arranged to cause it to pass alternately from the activated state to the deactivated state and vice versa.
  • THE figure 4A , 4B and 4C are schematic bottom plan views of this mechanism.
  • the manually operated mechanism operates by causing the column wheel 41 to advance one step each time the wearer of the watch actuates a push-button (referenced 13 in the figure 1 ). You can see on the figure 4A that the column wheel 41 is under the action of a pawl 55 arranged to cooperate with the teeth of the ratchet wheel 57.
  • the pawl 55 is pivotally mounted on one of the ends of a control lever 51.
  • each pressure exerted on the push-button has the effect of moving the pawl 55 from so as to advance the column wheel 41 by the angular value of one ratchet tooth (30°), and that the successive presses on the push-button 13 have the effect of progressively incrementing the angular position of the column wheel 41.
  • the alarm mechanism comprises an insulator arranged to neutralize the function of activation of the alarm mechanism by the manually operated mechanism when the degree of winding of the mainspring is less than a first predefined threshold value.
  • a first logic cam 61 and an insulator 63 can be seen.
  • the first logic cam 61 is mounted coaxially on the stop wheel set 85 (visible in the figures 2A and 2B ) so that it pivots together with the latter. It can also be seen that the first logic cam comprises several circular sectors separated from each other by shoulders.
  • the insulator 63 is in the form of a rocker which is pivoted around an axis 65 and which is provided with a cam follower 67 which is biased against the profile of the first logic cam 61 by a spring which is integrated in the insulator.
  • the insulator 63 is also provided with a second spout 69 provided to cooperate with the columns 59A of the second batch of columns of the column wheel 41.
  • the insulator 63 carries a pin 71 at its end furthest from the axis 65. 59A ( figure 4A And 4B ) when the wake-up mechanism is in the activated state. And that conversely, the beak 69 is opposite the space between two columns 59A ( Fig. 4C ) when the wake-up mechanism is in the disabled state.
  • the logic cam 61 is shown in an angular position such that the beak 67 of the insulator 63 is in abutment against a circular profile portion 61a of the cam.
  • the angular position of logic cam 61 is representative of the degree of winding of the mainspring.
  • the logic cam is turned so that the beak 67 of the insulator 63 is opposite the circular profile portion 61a, it means that the degree of winding of the mainspring is greater than the first predefined threshold value.
  • the second spout 69 of the insulator 63 bears against one of the six columns 59A of the column wheel 41.
  • the mainspring has at least partially disarmed by rotating the logic cam 61 counterclockwise. It can be understood that the degree of winding of the mainspring is now lower than the first predefined threshold value, since the beak 67 is no longer opposite the circular profile portion 61a. Nose 67 of insulator 63 now faces another circular profile portion (referenced 61b) of cam profile 61, the radius of circular profile portion 61b being substantially less than that of circular profile portion 61a. It can however be observed that the beak 67 is not in abutment against the circular profile 61b, but that it is on the contrary suspended above the profile 61b. Indeed, the second beak 69 of the insulator 63 is always in abutment against the same column 59A of the column wheel 41, because the alarm mechanism is always activated, the ringing being in progress.
  • the spout 69 of the insulator 63 is lowered between two columns 59A of the column wheel 41. It will therefore be understood that the alarm mechanism is now deactivated.
  • the insulator 63 carries a pin 71 at its end furthest from the axis 65. Still referring to the Fig. 4C , it can be seen that the pin 71 is arranged to keep the pawl 55 of the manually operated mechanism away from the ratchet wheel 57 of the column wheel 41.
  • the insulator 63 is in the position illustrated in the Fig.
  • the wearer of the watch no longer has the possibility of incrementing the column wheel by activating the push-button 13.
  • the insulator 63 in fact prevents the pawl 55 from coming into engagement with the teeth of the ratchet wheel 57.
  • FIG 4A represents the first logic cam 61 in the same angular position as in the figure 2A .
  • the beak 67 of the insulator 63 bears against the circular profile portion 61a.
  • the first logic cam 61 which is secured to the winding mobile 85 ( figure 2A and 2B ), is arranged to rotate counter-clockwise when the barrel disarms. Under these conditions, when, following the triggering of the bell, the first logic cam 61 begins to rotate, the beak 67 of the insulator 63 slides on the circular profile portion 61a as far as the shoulder 62 separating this profile portion from the profile portion 61b.
  • the beak 67 is opposite the circular profile portion 61b whose radius is substantially less than that of the circular profile 61a.
  • the other beak (the beak 69) of the insulator 63 bears against one of the columns 59A of the column wheel 41.
  • the insulator 63 does not tilt when the beak 67 passes from the profile portion 61a to the profile portion 61b since it is still supported by its other beak which is resting against one of the columns of the column wheel. It will be understood from the above that the isolator 63 does not interfere with the operation of the manually operated mechanism when the wake-up mechanism is in the activated state.
  • the stop wheel set 85 represented comprises four different levels.
  • the two lower levels are, as we have seen, a star wheel 87 and a cam 89 which together constitute the stopping mobile 85 proper ( Fig. 2B ).
  • the third level of the mobile 85 is constituted by the first logic cam 61 which, as we have also seen, is fixed rigidly to the first two levels in the coaxial position.
  • the stop wheel set 85 also comprises a fourth level formed mainly by a second logic cam 95 which is pivotally mounted above the first logic cam 61 in the coaxial position.
  • the plate of the second logic cam is pierced with an oblong 97 which defines an arc of a circle concentric with the pivot axis of the cam.
  • the first logic cam 61 carries a pin 99 which is arranged to slide in the oblong 97. The presence of this oblong allows the second logic cam 95 to pivot relative to the rest of the stop wheel set 85 inside a sector whose extent is limited by the two ends of the oblong 97.
  • the alarm mechanism comprises an automatic system arranged to deactivate it when the mainspring is disarmed to below a second predefined threshold value, the second threshold value being lower than the first threshold value.
  • THE Figures 5A, 5B And 5C are schematic plan views illustrating three phases of operation of the aforementioned automatic system. Referring to the three aforementioned figures, it can be seen that the second logic cam 95, which is mounted on the winding wheel set 85, comprises a profile portion 111 with a constant radius and a profile portion 115 which is recessed.
  • the three figures also show the column wheel 41 with its ratchet wheel 57 immobilized by the jumper 58, and an instantaneous trigger rocker 103 which is pivoted by one of its ends around an axis 105. It can further be seen that the instantaneous trigger rocker carries a pawl 109 which is provided to actuate the ratchet wheel 57 of the column wheel 41, and which is fixed to the end of the rocker 103 the furthest from the pivot axis 105. Finally, the instantaneous release rocker is also provided with a roller 107 which is biased against the second logic cam 95 by a return spring 113.
  • the configuration shown in figure 5A corresponds to the situation where the mainspring is fully charged. It can be seen that in this configuration, the wheel 107 bears against the profile portion 111 with a constant radius of the cam 95. Then, when the striking mechanism is triggered and the mainspring is disarmed by dragging it, the mobile stopper 85 successively performs two steps of 30° clockwise. During the first step of 30°, the second logic cam 95 is integral in rotation with the rest of the mobile stopper 85. Indeed, the pin 99 is then at one end of the oblong 97, and it prevents the second logic cam 95 from pivoting relative to the rest of the mobile stopper 85 counterclockwise. Under these conditions, the wheel 107 rolls against the profile portion 111 with a constant radius.
  • the roller 107 arrives at the end of the profile portion 111 with a constant radius (this situation is shown in the figure 5B ).
  • this situation is shown in the figure 5B .
  • the force with which the roller 107 presses against the profile of the second logic cam 95 ceases to be oriented radially, but on the contrary is oriented so as to push the cam 95 to pivot clockwise.
  • the caster 107 suddenly plunges into the recessed section portion 115 by pivoting the instant trigger rocker 103 counterclockwise.

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  • General Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Electromechanical Clocks (AREA)

Description

La présente invention concerne un mécanisme de réveil pour pièce d'horlogerie mécanique, et plus particulièrement un tel mécanisme de réveil pouvant se trouver soit dans un état activé, soit dans un état désactivé, et comprenant :

  • un mécanisme de sonnerie ;
  • un ressort-moteur agencé pour se désarmer en entraînant le mécanisme de sonnerie suite à son déclenchement ;
  • un mécanisme à commande manuelle agencé pour alternativement activer et désactiver le mécanisme de réveil ;
  • un système de déclenchement comportant une came reliée cinématiquement au mouvement, et agencée pour commander le déclenchement du mécanisme de sonnerie à une heure préprogrammée, lorsque le mécanisme de réveil est dans l'état activé ; et
  • un système de réglage permettant de programmer manuellement et d'indiquer l'heure programmée pour le déclenchement du mécanisme de sonnerie.
The present invention relates to an alarm mechanism for a mechanical timepiece, and more particularly such an alarm mechanism which can be either in an activated state or in a deactivated state, and comprising:
  • a striking mechanism;
  • a mainspring arranged to disarm by driving the striking mechanism following its triggering;
  • a manually operated mechanism arranged to alternately activate and deactivate the alarm mechanism;
  • a triggering system comprising a cam connected kinematically to the movement, and arranged to control the triggering of the striking mechanism at a preprogrammed time, when the alarm mechanism is in the activated state; And
  • a setting system for manually programming and indicating the programmed time for the triggering of the striking mechanism.

Selon un deuxième aspect, l'invention concerne une pièce d'horlogerie comportant un mécanisme de réveil conforme au premier aspect de l'invention.According to a second aspect, the invention relates to a timepiece comprising an alarm mechanism in accordance with the first aspect of the invention.

ART ANTERIEURPRIOR ART

On connait des mécanismes de réveil conforme à la définition donnée ci-dessus. Dans ces mécanismes connus, la sonnerie du réveil consomme une quantité importante d'énergie mécanique. C'est la raison pour laquelle les pièces d'horlogeries qui en sont équipées possèdent généralement un deuxième barillet avec un ressort-moteur exclusivement dédié à l'actionnement de la sonnerie. Toutefois, même avec un barillet supplémentaire, l'énergie mécanique disponible n'est généralement pas suffisante pour permettre au mécanisme de réveil de sonner une deuxième fois après avoir sonné une première fois, à moins que l'utilisateur de la pièce d'horlogerie n'ait remonté entre-temps le barillet de sonnerie. Cet état de fait peut être à l'origine de mauvaises surprises pour une personne qui désire utiliser le mécanisme de réveil de sa pièce d'horlogerie. Il serait donc souhaitable de disposer d'un mécanisme de réveil avec lequel on peut être certain qu'il y a suffisamment d'énergie pour lui permettre de sonner le moment venu pendant toute la durée voulue. EP 2 226 688 A1 concerne une pièce d'horlogerie comportant une unité de commande déplacée entre des positions définies par un mécanisme de réserve de marche. Une unité de déclenchement, c'est-à-dire une roue à rochet, est activée pour coopérer avec une pointe de déclenchement pour déclencher un mécanisme supplémentaire, qui est un mécanisme d'alarme sonnant à des intervalles fixes (par exemple : chaque heure, chaque quart d'heure). EP 1 394 637 A1 concerne un mécanisme de montre comprenant un indicateur de réglage d'alarme et une commande de verrouillage actionnés par un bouton-poussoir à travers une goupille dentée, un rochet, une roue et comprenant des leviers de verrouillage d'alarme et d'indicateur de verrouillage avec un symbole d'affichage attaché.Awakening mechanisms conforming to the definition given above are known. In these known mechanisms, the ringing of the alarm clock consumes a significant amount of mechanical energy. This is why the timepieces equipped with it generally have a second barrel with a mainspring exclusively dedicated to actuating the The ring. However, even with an additional barrel, the mechanical energy available is generally not sufficient to allow the alarm mechanism to strike a second time after ringing the first time, unless the user of the timepiece has wound up the striking barrel in the meantime. This state of affairs can be the source of unpleasant surprises for a person who wishes to use the alarm mechanism of his timepiece. It would therefore be desirable to have an alarm mechanism with which one can be sure that there is enough energy to allow it to ring when the time comes for the entire duration desired. EP 2 226 688 A1 relates to a timepiece comprising a control unit moved between positions defined by a power reserve mechanism. A trigger unit, i.e. a ratchet wheel, is activated to cooperate with a trigger tip to trigger an additional mechanism, which is an alarm mechanism sounding at fixed intervals (eg: every hour, every quarter hour). EP 1 394 637 A1 relates to a watch mechanism comprising an alarm setting indicator and a lock control actuated by a push button through a cog pin, ratchet, wheel and comprising alarm lock and lock indicator levers with an attached display symbol.

BREF EXPOSE DE L'INVENTIONBRIEF DESCRIPTION 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 mécanisme de réveil conforme à la revendication 1 annexée. Des modes de réalisation préférés de la présente invention sont définis dans les revendications annexées 2-11.An object of the present invention is to remedy the drawbacks of the prior art which have just been explained. The present invention achieves this and other objects by providing an alarm mechanism according to appended claim 1. Preferred embodiments of the present invention are defined in appended claims 2-11.

On comprendra que l'expression « mécanisme de réveil » désigne ici tout mécanisme adapté pour émettre des signaux acoustiques à des moments choisis à l'avance.It will be understood that the expression “wake-up mechanism” designates here any mechanism suitable for emitting acoustic signals at times chosen in advance.

Conformément à l'invention, le mécanisme de réveil peut être mis dans l'état activé ou dans l'état désactivé. Lorsque le mécanisme de réveil se trouve dans l'état désactivé, le mécanisme de sonnerie ne se déclenche pas à l'heure préprogrammée, même si le ressort-moteur et suffisamment armé pour entraîner le mécanisme de sonnerie. De plus, le mécanisme de réveil comporte un isolateur agencé pour neutraliser la fonction d'activation du mécanisme de réveil lorsque le degré d'armage du ressort-moteur est inférieur à une première valeur seuil prédéfinie. Grâce à cette caractéristique, si le mécanisme de réveil est dans l'état activé, un utilisateur peut être certain que la sonnerie se produira effectivement lorsque la came commandera le déclenchement du mécanisme de sonnerie. Inversement, si l'utilisateur oublie de remonter le barillet de sonnerie avant de se servir du mécanisme à commande manuelle pour activer le mécanisme de réveil, le mécanisme de commande manuelle sera inopérant. En constatant qu'il ne peut pas activer le mécanisme de réveil, l'utilisateur se rendra compte qu'il a oublié de remonter le barillet de sonnerie.According to the invention, the wake-up mechanism can be put in the activated state or in the deactivated state. When the alarm mechanism is in the deactivated state, the striking mechanism does not trigger at the preprogrammed time, even if the mainspring is sufficiently charged to drive the striking mechanism. In addition, the alarm mechanism comprises an isolator arranged to neutralize the activation function of the alarm mechanism when the degree of winding of the mainspring is less than a first predefined threshold value. Thanks to this feature, if the alarm mechanism is in the activated state, a user can be certain that the ringing will indeed occur when the cam commands the triggering of the ringing mechanism. Conversely, if the user forgets to wind the striking barrel before using the manual control mechanism to activate the wake-up mechanism, the manual control mechanism will be inoperative. When noting that he cannot activate the alarm mechanism, the user will realize that he forgot to wind the striking barrel.

Conformément à un mode de réalisation avantageux de l'invention, le mécanisme de réveil comporte encore un organe indicateur d'activation agencé pour indiquer si le mécanisme de réveil et dans l'état activé ou dans l'état désactivé. La présence d'un organe indicateur d'activation a notamment l'avantage de permettre de confirmer à un utilisateur, qui vient d'actionner le mécanisme à commande manuelle pour activer le mécanisme de réveil, que le mécanisme de réveil a effectivement été activé.According to an advantageous embodiment of the invention, the alarm mechanism further comprises an activation indicator member arranged to indicate whether the alarm mechanism is in the activated state or in the deactivated state. The presence of an activation indicator member has the particular advantage of making it possible to confirm to a user, who has just actuated the manually operated mechanism to activate the alarm mechanism, that the alarm mechanism has actually been activated.

BREVE DESCRIPTION DES FIGURESBRIEF DESCRIPTION OF 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 :

  • la figure 1 est une vue schématique en plan côté cadran d'une montre-bracelet comportant un mécanisme de réveil conforme à un mode de réalisation particulier de l'invention ;
  • la figure 2A est une vue partielle en plan de dessus du mécanisme de réveil de la montre-bracelet de la figure 1, montrant plus particulièrement l'arbre et le ressort qui font partie du barillet de sonnerie, l'arrêtage, et le système logique ;
  • la figure 2B est un schéma de principe du fonctionnement de l'arrêtage du mécanisme de réveil de la montre-bracelet de la figure 1 ;
  • les figures 3A, 3B et 3C sont des vues schématiques en plan montrant le système de déclenchement du mécanisme de réveil de la montre-bracelet de la figure 1, les figures 3A et 3B illustrant le mécanisme de réveil dans l'état activé, respectivement avant le déclenchement et juste après le déclenchement, et la figure 3C illustrant le mécanisme de réveil dans l'état désactivé ;
  • les figures 4A, 4B et 4C sont des vues schématiques en plan de dessous montrant le mécanisme à commande manuelle agencé pour faire passer alternativement le mécanisme de réveil de la montre-bracelet de la figure 1 de l'état activé à l'état désactivé et inversement, et montrant de plus l'isolateur agencé pour neutraliser la fonction d'activation du mécanisme de réveil, les figures 4A et 4B illustrant le mécanisme de réveil dans l'état activé, le degré d'armage du ressort-moteur étant respectivement supérieur et inférieur à la première valeur seuil prédéfinie, et la figure 4C illustrant le mécanisme de réveil dans l'état désactivé, le degré d'armage du ressort-moteur étant inférieur à la première valeur seuil ;
  • les figures 5A, 5B et 5C sont des vues schématiques en plan illustrant trois phases du fonctionnement du mécanisme automatique agencé pour désactiver le mécanisme de réveil de la montre-bracelet de la figure 1 lorsque le ressort-moteur s'est désarmé jusqu'au-dessous d'une valeur seuil prédéfinie.
Other characteristics and advantages of the present invention will appear on reading the following description, given solely by way of non-limiting example, and made with reference to the appended drawings in which:
  • there figure 1 is a schematic plan view on the dial side of a wristwatch comprising an alarm mechanism according to a particular embodiment of the invention;
  • there figure 2A is a partial top plan view of the wristwatch alarm mechanism of the figure 1 , showing more particularly the shaft and the spring which form part of the striking barrel, the stopper, and the logic system;
  • there figure 2B is a block diagram of the operation of the stopper of the alarm clock mechanism of the wristwatch of the figure 1 ;
  • THE Figures 3A, 3B And 3C are schematic plan views showing the release system of the alarm mechanism of the wristwatch of the figure 1 , THE figures 3A and 3B illustrating the wake-up mechanism in the activated state, respectively before triggering and just after triggering, and the Fig. 3C illustrating the wake-up mechanism in the disabled state;
  • THE figure 4A , 4B and 4C are schematic bottom plan views showing the manually operated mechanism arranged to alternately switch the alarm mechanism of the wristwatch from the figure 1 from the activated state to the deactivated state and vice versa, and further showing the isolator arranged to neutralize the activation function of the wake-up mechanism, the figure 4A And 4B illustrating the wake-up mechanism in the activated state, the degree of winding of the mainspring being respectively higher and lower than the first predefined threshold value, and the Fig. 4C illustrating the alarm mechanism in the deactivated state, the degree of winding of the mainspring being less than the first threshold value;
  • THE Figures 5A, 5B And 5C are schematic plan views illustrating three phases of operation of the automatic mechanism arranged to deactivate the alarm mechanism of the wristwatch of the figure 1 when the mainspring has disarmed to below a predefined threshold value.

DESCRIPTION DETAILLEE D'UN MODE REALISATIONDETAILED DESCRIPTION OF AN EMBODIMENT

La figure 1 annexée est une vue schématique en plan côté cadran d'une montre-réveil conforme à un mode de réalisation particulier de l'invention. La montre-réveil représentée va maintenant être décrite en se limitant aux aspects essentiels de l'invention et en laissant de côté un grand nombre de détails qui ne concernent pas directement l'invention. La montre de la figure 1 comporte une couronne de remontage (référencée 11) qui dépasse de la carrure de la montre approximativement à 4 heures. La couronne 11 est agencée de manière à permettre de remonter le barillet de sonnerie en la faisant tourner, en position repoussée, dans le sens horaire. La couronne de remontage 11 permet également de corriger l'heure d'alarme. Pour décaler l'heure d'alarme vers l'avant ou vers l'arrière, il faut faire tourner la couronne respectivement dans le sens horaire et dans le sens antihoraire après avoir amené la tige de remontoir en position de réglage de l'heure d'alarme. L'heure d'alarme est affichée, sous forme numérique, dans deux guichets (référencés 3 et 5) qui sont aménagés côte à côte dans le cadran à 12 heures. Un premier des deux guichets (référencé 3) indique l'heure sous la forme d'un nombre entier entre 1 et 12, et le deuxième guichet (référencé 5) indique la minute sous la forme d'un nombre à deux chiffres qui est un multiple de 5 compris entre 00 et 55. La montre-réveil illustrée dans la figure 1 comporte encore un poussoir (référencé 13) qui dépasse de la carrure approximativement à 2 heures. Ce poussoir est prévu pour permettre d'actionner manuellement un mécanisme agencé pour alternativement activer et désactiver le mécanisme de réveil de la montre. Conformément au mode de réalisation qui fait l'objet du présent exemple, ce mécanisme à commande manuelle est en outre associé à un organe indicateur d'activation qui est prévu pour indiquer si le mécanisme de réveil est dans l'état activé ou dans l'état désactivé. Cet organe indicateur est agencé pour apparaître dans un troisième petit guichet du cadran (référencé 7). Le guichet 7 est aménagé à 12 heures entre les deux premiers guichets 3 et 5 et le tour d'heures. Enfin, un quatrième petit guichet (référencé 9) est disposé entre les deux premiers guichets 3 et 5 et le centre du cadran. L'indicateur qui apparaît dans le petit guichet 9 est un indicateur jour/nuit associé à l'heure d'alarme.There figure 1 appended is a schematic plan view on the dial side of an alarm watch according to a particular embodiment of the invention. The alarm clock shown will now be described by limiting itself to the essential aspects of the invention and leaving aside a large number of details which do not directly relate to the invention. The watch of the figure 1 has a winding crown (referenced 11) which protrudes from the middle of the watch at approximately 4 o'clock. The crown 11 is arranged in such a way as to allow the striking barrel to be wound up by rotating it, in the pushed back position, clockwise. The winding crown 11 also allows to correct the alarm time. To shift the alarm time forwards or backwards, the crown must be turned clockwise and counterclockwise respectively after having brought the winding stem to the position for setting the alarm time. The alarm time is displayed, in digital form, in two apertures (referenced 3 and 5) which are arranged side by side in the dial at 12 o'clock. A first of the two apertures (referenced 3) indicates the hour in the form of an integer between 1 and 12, and the second aperture (referenced 5) indicates the minute in the form of a two-digit number which is a multiple of 5 comprised between 00 and 55. The alarm watch illustrated in the figure 1 still has a pusher (reference 13) which protrudes from the case middle at approximately 2 o'clock. This pusher is provided to make it possible to manually actuate a mechanism arranged to alternately activate and deactivate the clock mechanism of the watch. In accordance with the embodiment which is the subject of the present example, this manually operated mechanism is further associated with an activation indicator member which is provided to indicate whether the alarm mechanism is in the activated state or in the deactivated state. This indicator member is arranged to appear in a third small aperture of the dial (reference 7). Window 7 is set up at 12 o'clock between the first two windows 3 and 5 and the hour circle. Finally, a fourth small aperture (referenced 9) is arranged between the first two apertures 3 and 5 and the center of the dial. The indicator that appears in the small window 9 is a day/night indicator associated with the alarm time.

Conformément à l'invention, Le mécanisme de réveil comprend un mécanisme de sonnerie et un ressort-moteur 15 (figure 2A) agencé pour se désarmer en entraînant le mécanisme de sonnerie suite à un déclenchement de ce dernier. De manière classique, le ressort-moteur qui est exclusivement dédié à l'actionnement de la sonnerie, est agencé dans un barillet. Lorsque le barillet tourne, il entraîne le mécanisme de sonnerie par l'intermédiaire d'un train d'engrenage. Le barillet entraîne également un frein d'inertie prévu pour réguler son dévidement et donc la fréquence avec laquelle les signaux acoustiques sont émis. Le rouage qui relie le barillet au frein d'inertie est appelé le « petit rouage ». Ce type d'agencement est connu en tant que tel. Il ne sera donc pas décrit plus avant dans la présente description qui laisse volontairement de côté un grand nombre de détails qui peuvent être repris de l'état de la technique et qui ne concernent pas directement l'invention. En ce qui concerne les mécanismes de sonnerie en particulier, on peut en trouver une description pertinente par exemple dans le livre « Théorie d'horlogerie » (pages 222-224).According to the invention, the alarm mechanism comprises a striking mechanism and a mainspring 15 ( figure 2A ) arranged to disarm by driving the striking mechanism following a triggering of the latter. Conventionally, the mainspring which is exclusively dedicated to actuating the chime, is arranged in a barrel. When the barrel rotates, it drives the striking mechanism via a gear train. The barrel also drives an inertia brake provided to regulate its unwinding and therefore the frequency with which the acoustic signals are issued. The gear train that connects the barrel to the inertia brake is called the “small gear train”. This type of arrangement is known as such. It will therefore not be described any further in the present description, which voluntarily leaves out a large number of details which can be taken from the state of the art and which do not directly relate to the invention. With regard to striking mechanisms in particular, a relevant description can be found, for example, in the book “Theorie d'horlogerie” (pages 222-224).

Comme on peut le voir en particulier dans la figure 2A, le barillet de sonnerie du mécanisme de réveil qui fait l'objet de la présente description est équipé d'un arrêtage (référencé 85). Les arrêtages sont des dispositifs qui sont connus de l'homme du métier en tant que tels. Dans une pièce d'horlogerie, l'arrêtage sert d'une part à limiter le nombre de tours d'armage du barillet lors du remontage, et il sert d'autre part à empêcher que le ressort-moteur ne se désarme complètement. La figure 2B est un schéma de principe du fonctionnement de l'arrêtage du mécanisme de réveil du présent exemple. Le principe de fonctionnement de l'arrêtage représenté est similaire à celui d'un arrêtage à croix de Malte traditionnel. Toutefois, l'arrêtage illustré possède la particularité d'être étagé sur deux niveaux. La disposition sur deux niveaux présente l'avantage d'économiser de la place en largeur, tout en évitant les risques de désynchronisation. La figure 2B montre une portion de disque 81 et un doigt 83 qui sont tous deux fixés sur l'arbre du barillet (non représenté dans la figure 2B, mais visible et référencé 79 dans la figure 2A). La figure 2B montre encore un mobile partiellement denté 85 à deux niveaux qui est monté pivotant sur un arbre fixe à proximité du barillet. Le premier niveau du mobile 85 est constitué par une étoile 87 qui est agencée pour coopérer avec le doigt 83, et le deuxième niveau est constitué par une came 89 agencée pour coopérer avec la portion de disque 81. On peut voir que la came 89 comporte une portion circulaire 91 et deux portions concaves 93a et 93b.As can be seen in particular in the figure 2A , the striking barrel of the alarm mechanism which is the subject of the present description is equipped with a stopper (reference 85). Stoppers are devices which are known to those skilled in the art as such. In a timepiece, the stop serves on the one hand to limit the number of winding revolutions of the barrel during winding, and it serves on the other hand to prevent the mainspring from disarming completely. There figure 2B is a block diagram of the operation of the shutdown of the wake-up mechanism of the present example. The operating principle of the stop shown is similar to that of a traditional Maltese cross stop. However, the stop illustrated has the particularity of being staged on two levels. The arrangement on two levels has the advantage of saving space in width, while avoiding the risk of desynchronization. There figure 2B shows a disc portion 81 and a finger 83 which are both fixed on the barrel arbor (not shown in the figure 2B , but visible and referenced 79 in the figure 2A ). There figure 2B further shows a partially toothed mobile 85 at two levels which is pivotally mounted on a fixed shaft close to the barrel. The first level of the mobile 85 is constituted by a star 87 which is arranged to cooperate with the finger 83, and the second level is constituted by a cam 89 arranged to cooperate with the disc portion 81. It can be seen that the cam 89 comprises a circular portion 91 and two concave portions 93a and 93b.

Vu de dessus, comme représenté dans les figures 2A et 2B, le sens dans lequel il faut faire tourner l'arbre 79 pour remonter le barillet est le sens horaire, et donc à l'inverse, le barillet se désarme en faisant tourner l'arbre de barillet dans le sens antihoraire. On comprendra donc que la position angulaire du mobile d'arrêtage 85 dans les figures 2A et 2B correspond à la situation où le ressort-moteur est complètement armé. Comme on peut le voir, la portion de disque 81 présente une face concave, et dans la configuration illustrée, l'arrêtage 85 bloque la rotation de l'arbre de barillet dans le sens horaire par arc-boutement d'une des extrémités 81a de la face concave contre une extrémité de la portion circulaire 91 de la came 89. Dans cette configuration, le barillet est par contre libre de se désarmer en entraînant l'arbre 79 dans le sens antihoraire.Seen from above, as shown in the figures 2A and 2B , the direction in which the arbor 79 must be rotated to wind the barrel is clockwise, and therefore conversely, the barrel is disarmed by rotating the barrel arbor counterclockwise. It will therefore be understood that the angular position of the stopping mobile 85 in the figures 2A and 2B corresponds to the situation where the mainspring is fully charged. As can be seen, disc portion 81 has a concave face, and in the illustrated configuration, stopper 85 blocks the rotation of the barrel arbor clockwise by buttressing one of the ends 81a of the concave face against one end of the circular portion 91 of the cam 89. In this configuration, the barrel is on the other hand free to disarm by driving the arbor 79 counterclockwise.

Lorsque le ressort-moteur se désarme en entraînant l'arbre de barillet, il entraîne le doigt 83 en rotation, de sorte que ce dernier fait avancer l'étoile 87 d'un pas à chaque tour. Dans l'exemple illustré, le doigt 83 fait pivoter le mobile d'arrêtage 85 de 30° à chaque tour de l'arbre de barillet. Lorsque le mobile d'arrêtage a pivoté de 60°, le ressort-moteur ayant fait accomplir deux tours complets à l'arbre de barillet en se désarmant, ce dernier se bloque à nouveau en raison, cette fois-ci, de l'arc-boutement de l'extrémité 81b de la face concave de la portion de disque 81 contre l'autre extrémité de la portion circulaire 91 de la came 89. L'arrêtage empêche ainsi le barillet de se désarmer davantage. On comprendra en outre que la position angulaire du mobile d'arrêtage 85 est fonction du degré d'armage du ressort-moteur et que, dans l'exemple illustré, un angle de 60° sépare la position d'armage maximum de la position d'armage minimum.When the mainspring is disarmed by driving the barrel arbor, it drives the finger 83 in rotation, so that the latter causes the star wheel 87 to advance by one step at each turn. In the example illustrated, the finger 83 causes the mobile stopper 85 to pivot by 30° for each turn of the barrel arbor. When the stopper wheel has pivoted 60°, the mainspring having caused the barrel arbor to complete two complete turns while disarming, the latter is blocked again due, this time, to the buttressing of the end 81b of the concave face of the disc portion 81 against the other end of the circular portion 91 of the cam 89. The stoppage thus prevents the barrel from disarming further. It will also be understood that the angular position of the mobile stopper 85 is a function of the degree of winding of the mainspring and that, in the example illustrated, an angle of 60° separates the position of maximum winding from the position of minimum winding.

Conformément à l'invention, le mécanisme de réveil comprend un système de déclenchement prévu pour commander le déclenchement du mécanisme de sonnerie à une heure programmée, pour autant que le mécanisme de réveil soit activé. Les figures 3A, 3B et 3C sont des vues schématiques en plan du système de déclenchement du mécanisme de réveil de la montre de la figure 1. Les deux premières de ces trois figures illustrent le système de déclenchement lorsque le mécanisme de réveil et dans l'état activé, alors que la troisième figure 3C illustre le même système lorsque le mécanisme de réveil est dans l'état désactivé. On précisera de plus, que la figure 3A montre le système avant le déclenchement et la figure 3B le montre juste après. Sur les trois figures, on peut voir un levier 33 monté rotatif sur un pivot 34 et muni d'un premier bras agencé pour coopérer avec un mobile denté 18 qui fait partie du petit rouage, une came de déclenchement 21 munie d'une encoche 23, et une bascule de déclenchement 25 pivotée autour d'un axe 27 et munie d'un bec 29 qui est rappelé contre la came 21 par un ressort de rappel 31. On peut voir en outre que l'extrémité distale de la bascule 25 porte une goupille 32 agencée pour coopérer avec un second bras du levier 33. Dans la configuration illustrée par la figure 3A, le premier bras du levier 33 est inséré dans la denture d'une étoile à quatre branches 19 du mobile 18. Le mobile 18 est donc bloqué de sorte que le barillet de sonnerie ne peut pas tourner. Dans la configuration illustrée par la figure 3B, le premier bras du levier 33 est maintenu écarté de la denture de l'étoile 19, de sorte que le mobile 18 est libre de tourner, le barillet étant alors libre de se désarmer en entraînant le mécanisme de sonnerie.According to the invention, the alarm clock mechanism comprises a triggering system designed to control the triggering of the ringing mechanism at a programmed time, provided that the alarm clock mechanism is activated. THE Figures 3A, 3B And 3C are schematic plan views of the triggering system of the alarm mechanism of the watch of the figure 1 . The first two of these three figures illustrate the trigger system when the wake-up mechanism and in the activated state, while the third Fig. 3C illustrates the same system when the wake-up mechanism is in the disabled state. It will further be specified that the Figure 3A shows the system before triggering and the Figure 3B show it right after. In the three figures, one can see a lever 33 rotatably mounted on a pivot 34 and provided with a first arm arranged to cooperate with a toothed mobile 18 which forms part of the small gear train, a trigger cam 21 provided with a notch 23, and a trigger rocker 25 pivoted about an axis 27 and provided with a beak 29 which is biased against the cam 21 by a return spring 31. One can also see that the distal end of rocker 25 carries a pin 32 arranged to cooperate with a second arm of lever 33. In the configuration illustrated by the Figure 3A , the first arm of the lever 33 is inserted in the toothing of a four-pointed star 19 of the mobile 18. The mobile 18 is therefore blocked so that the striking barrel cannot rotate. In the configuration illustrated by the Figure 3B , the first arm of the lever 33 is held apart from the toothing of the star 19, so that the mobile 18 is free to rotate, the barrel then being free to disarm by driving the striking mechanism.

La came 21 est reliée au rouage de finissage de la montre de manière à être entraînée pour tourner dans le sens antihoraire (la came étant vue sous l'angle représenté dans les figures). Dans le présent exemple, la came 21 effectue un tour en vingt-quatre heures. Conformément à l'invention, le mécanisme de réveil comporte également un système de réglage, qui peut être d'un type connu de l'homme du métier, et qui permet de régler la position angulaire de la came 21 de manière à ce que l'encoche 23 se trouve en face du bec 29 à une heure de réveil programmée.The cam 21 is connected to the going train of the watch so as to be driven to rotate counterclockwise (the cam being seen from the angle shown in the figures). In the present example, the cam 21 completes one revolution in twenty-four hours. In accordance with the invention, the alarm mechanism also comprises an adjustment system, which may be of a type known to those skilled in the art, and which makes it possible to adjust the angular position of the cam 21 so that the notch 23 is opposite the spout 29 at a programmed alarm time.

Le principe de fonctionnement du système de déclenchement du mécanisme de sonnerie est le suivant. A l'heure de réveil programmée, le bec 29 chute subitement dans l'encoche 23, ce qui fait pivoter la bascule de déclenchement 25 autour de son axe 27 dans le sens antihoraire. La goupille 32 portée par l'extrémité distale de la bascule 25 vient alors actionner le levier 33, de sorte que ce dernier pivote dans le sens horaire (figure 3B). En pivotant ainsi dans le sens horaire, le levier 33libère l'étoile 19. Le barillet se trouve alors libre de tourner en entraînant le mécanisme de sonnerie.The operating principle of the striking mechanism trigger system is as follows. At the programmed wake-up time, the spout 29 suddenly drops into the notch 23, which causes the trigger rocker 25 to pivot around its axis 27 counterclockwise. Pin 32 carried by the distal end of rocker 25 then actuates lever 33, so that the latter pivots clockwise ( Figure 3B ). By thus pivoting clockwise, the lever 33 releases the star 19. The barrel is then free to rotate, driving the striking mechanism.

Les figures 3A, 3B et 3C montrent également une roue à colonnes 41 et une bascule de commande 35. La roue à colonnes du présent exemple est double. Il s'agit à peu de chose près de l'assemblage dos à dos de deux roues à colonnes de conception classique. La roue à colonnes 41 est essentiellement constituée d'une roue à rochet 57, d'un premier lot de six dents ou colonnes 59 portées de chant par le rochet sur la face supérieure de sa planche, et d'un second lot de six dents ou colonnes 59A portées de chant par le rochet sur la face inférieure de sa planche (seul le premier lot de colonnes est visible dans les figures 3A, 3B et 3C). Les colonnes présentent une section transversale sensiblement en forme de triangle tronqué. On peut voir également que le rochet 57 comprend 12 dents (deux dents pour chaque colonne d'un lot). Il s'agit en effet d'une roue à colonnes à deux temps. Lorsqu'elle n'est pas actionnée, la roue à colonnes 41 est maintenue dans une position angulaire stable par un ressort sautoir 58 dont l'extrémité appuie contre la roue à rochet. La bascule de commande 35, quant à elle, est pivotée autour d'un axe 37. On peut voir également qu'elle est munie d'un bec 39 et d'une goupille 45. Le bec 39 est rappelé contre les colonnes 59 de la roue à colonnes 41 par un ressort de rappel 43, et la goupille 45 est agencée pour coopérer avec un pied 47 dont est muni la bascule de déclenchement 25.THE Figures 3A, 3B And 3C also show a column wheel 41 and a control rocker 35. The column wheel of the present example is double. It is more or less the back-to-back assembly of two classically designed column wheels. The column wheel 41 essentially consists of a ratchet wheel 57, a first batch of six teeth or columns 59 carried on edge by the ratchet on the upper face of its board, and a second batch of six teeth or columns 59A carried on edge by the ratchet on the underside of its board (only the first batch of columns is visible in the Figures 3A, 3B And 3C ). The columns have a cross section substantially in the shape of a truncated triangle. It can also be seen that the ratchet 57 comprises 12 teeth (two teeth for each column of a batch). It is indeed a two-stroke column wheel. When it is not actuated, the column wheel 41 is maintained in a stable angular position by a jumper spring 58 whose end presses against the ratchet wheel. The control rocker 35, for its part, is pivoted around an axis 37. It can also be seen that it is provided with a beak 39 and a pin 45. The beak 39 is biased against the columns 59 of the column wheel 41 by a return spring 43, and the pin 45 is arranged to cooperate with a foot 47 with which the trigger rocker 25 is provided.

Les figures 3A et 3B montrent toutes les deux la roue à colonnes 41 orientée de manière à permettre au bec 39 de la bascule 35 de s'abaisser entre deux colonnes 59 sous l'action du ressort 43. Si maintenant, on fait pivoter le rochet 57 de la roue à colonnes 41 d'un pas, une des colonnes pousse le bec 39 de sorte qu'il se soulève et vient s'immobiliser en appui contre la colonne (figure 3C). Ce mouvement provoque le pivotement de la bascule 35 dans le sens antihoraire. La roue à colonnes 41 est une roue à colonnes à deux temps. Ainsi, si on fait ensuite encore pivoter la roue à colonnes d'un pas supplémentaire, la colonne contre laquelle repose le bec 39 se dégage, et le bec redescend à nouveau entre deux colonnes actionné par le ressort 43. Ce mouvement provoque le pivotement de la bascule 35 dans l'autre sens, le sens horaire.THE figures 3A and 3B both show the column wheel 41 oriented so as to allow the beak 39 of the rocker 35 to lower between two columns 59 under the action of the spring 43. If now the ratchet 57 of the column wheel 41 is pivoted by one step, one of the columns pushes the beak 39 so that it rises and comes to rest resting against the column ( Fig. 3C ). This movement causes the rocker 35 to pivot in the direction counterclockwise. Column wheel 41 is a two-stroke column wheel. Thus, if the column wheel is then pivoted an additional step, the column against which the beak 39 rests is released, and the beak descends again between two columns actuated by the spring 43. This movement causes the rocker 35 to pivot in the other direction, clockwise.

Comme mentionné plus haut, la bascule de commande 35 comporte une goupille 45 qui est agencée pour coopérer avec un pied 47 de la bascule de déclenchement 25. Toutefois, lorsque la bascule 35 est abaissée entre deux colonnes comme illustré dans les figures 3A et 3B, la goupille 45 est maintenue écartée de la trajectoire du pied 47, et elle ne peut donc pas entraver le pivotement de la bascule de déclenchement 25 dans un sens ou dans l'autre. Lorsque par la suite, la roue à colonnes 41 est incrémentée d'un pas, le pivotement de la bascule de commande 35 dans le sens antihoraire s'accompagne d'un déplacement de la goupille 45 en direction du pied 47. Dans cette nouvelle position, la goupille 45 se trouve sur la trajectoire du pied 47, de sorte qu'elle bloque le pivotement de la bascule de déclenchement dans le sens antihoraire. On comprendra donc que, lorsque la bascule de commande 35 est soulevée par une des colonnes, le système de déclenchement est bloqué, de sorte que le bec 29 de la bascule de déclenchement 25 est dans l'incapacité de s'abaisser dans l'encoche 23 de la came de déclenchement 21 lorsqu'arrive l'heure programmée. Le mécanisme de sonnerie ne peut donc tout simplement pas se déclencher lorsque le bec 39 de la bascule de commande 35 est soulevé par une des colonnes 59.As mentioned above, the control rocker 35 includes a pin 45 which is arranged to cooperate with a foot 47 of the trigger rocker 25. However, when the rocker 35 is lowered between two columns as illustrated in the figures 3A and 3B , the pin 45 is kept away from the path of the foot 47, and it therefore cannot hinder the pivoting of the trigger rocker 25 in one direction or the other. When subsequently, the column wheel 41 is incremented by one step, the pivoting of the control rocker 35 in the counterclockwise direction is accompanied by a displacement of the pin 45 in the direction of the foot 47. In this new position, the pin 45 is on the trajectory of the foot 47, so that it blocks the pivoting of the trigger rocker in the counterclockwise direction. It will therefore be understood that, when the control rocker 35 is raised by one of the columns, the trigger system is blocked, so that the beak 29 of the trigger rocker 25 is unable to lower into the notch 23 of the trigger cam 21 when the programmed time arrives. The striking mechanism therefore simply cannot be triggered when the beak 39 of the control rocker 35 is raised by one of the columns 59.

On comprendra de ce qui précède que le mécanisme de réveil se trouve dans l'état activé lorsque la bascule 35 se trouve abaissée entre deux colonnes comme illustré dans les figures 3A et 3B. Et qu'inversement, le mécanisme de réveil se trouve dans l'état désactivé lorsque la bascule 35 est soulevée, le bec 39 reposant contre une des colonnes 59 comme illustré dans la figure 3C. On peut donc considérer que, dans le présent exemple, c'est la position angulaire de la roue à colonnes 41 qui détermine si le mécanisme de réveil se trouve dans l'état activé ou dans l'état désactivé. Comme déjà mentionné, le mécanisme de réveil qui fait l'objet de la présente description comporte encore un organe indicateur d'activation agencé pour indiquer si le mécanisme de réveil et dans l'état activé ou dans l'état désactivé. Dans le présent exemple, l'organe indicateur d'activation est commandé par la bascule 35 et, comme déjà mentionné, il est agencé pour apparaître dans un guichet référencé 7 (figure 1).It will be understood from the above that the alarm mechanism is in the activated state when the rocker 35 is lowered between two columns as illustrated in the figures 3A and 3B . And conversely, the alarm mechanism is in the deactivated state when the rocker 35 is raised, the beak 39 resting against one of the columns 59 as illustrated in the Fig. 3C . We can therefore consider that, in the present example, it is the position angle of the column wheel 41 which determines whether the alarm mechanism is in the activated state or in the deactivated state. As already mentioned, the wake-up mechanism which is the subject of the present description further comprises an activation indicator member arranged to indicate whether the wake-up mechanism is in the activated state or in the deactivated state. In the present example, the activation indicator member is controlled by rocker 35 and, as already mentioned, it is arranged to appear in a window referenced 7 ( figure 1 ).

On remarquera en outre que, si on incrémente d'un pas la position de la roue à colonnes 41 pour faire commuter le mécanisme de réveil de l'état activé à l'état désactivé pendant que le ressort-moteur est en train de se désarmer suite au déclenchement du mécanisme de sonnerie, on provoque le pivotement de la bascule 35 dans le sens antihoraire comme déjà expliqué en relation avec la figure 3C. Le pivotement de la bascule 35 fait avancer la goupille 45 en direction du pied 47 de la bascule de déclenchement 25. Le mécanisme de sonnerie venant de se déclencher, la bascule 25 se trouve à ce moment là dans la position représentée dans la figure 3B, avec son bec 29 abaissé dans l'encoche 23 de la came de déclenchement 21. Dans cette position, le pied 47 se trouve sur le chemin de la goupille 45. La goupille 45 repousse donc la bascule de déclenchement 25 qui vient ainsi dans la position représentée dans la figure 3C en provoquant l'arrêt de la sonnerie.It will also be noted that, if the position of the column wheel 41 is incremented by one step to cause the alarm mechanism to switch from the activated state to the deactivated state while the mainspring is in the process of being disarmed following the triggering of the striking mechanism, it causes the pivoting of the rocker 35 in the counterclockwise direction as already explained in relation to the Fig. 3C . The pivoting of the rocker 35 causes the pin 45 to advance in the direction of the foot 47 of the trigger rocker 25. The striking mechanism having just been triggered, the rocker 25 is at this moment in the position represented in the Figure 3B , with its beak 29 lowered into the notch 23 of the trigger cam 21. In this position, the foot 47 is in the path of the pin 45. The pin 45 therefore pushes back the trigger rocker 25 which thus comes into the position represented in the Fig. 3C causing the ringing to stop.

Conformément à l'invention, le mécanisme de réveil comporte un mécanisme à commande manuelle agencé pour le faire passer alternativement de l'état activé à l'état désactivé et inversement. Les figures 4A, 4B et 4C sont des vues schématiques en plan de dessous de ce mécanisme. Dans le mode de réalisation illustré, le mécanisme à commande manuelle opère en faisant avancer d'un pas la roue à colonne 41 chaque fois que le porteur de la montre actionne un bouton-poussoir (référencé 13 dans la figure 1). On peut voir sur la figure 4A que la roue à colonnes 41 est sous l'action d'un cliquet 55 arrangé pour coopérer avec les dents de la roue à rochet 57. Le cliquet 55 est monté pivotant sur une des extrémités d'un levier de commande 51. Lorsque le bouton-poussoir 13 (non représenté dans les figures 4A, 4B et 4C) est actionné, son extrémité avant se déplace selon un chemin rectiligne (indiqué par la flèche A) en repoussant le levier de commande 51, de sorte que ce dernier pivote autour d'un axe 53. Un ressort de rappel (non représenté) est encore prévu pour faire revenir le levier de commande 51 en arrière, dès que le porteur de la montre relâche sa pression sur le bouton-poussoir 13. On peut donc comprendre que chaque pression exercée sur le poussoir a pour effet de déplacer le cliquet 55 de façon à faire avancer la roue à colonnes 41 de la valeur angulaire d'une dent de rochet (30°), et que les pressions successives sur le bouton-poussoir 13 ont pour effet d'incrémenter progressivement la position angulaire de la roue à colonnes 41.In accordance with the invention, the wake-up mechanism comprises a manually operated mechanism arranged to cause it to pass alternately from the activated state to the deactivated state and vice versa. THE figure 4A , 4B and 4C are schematic bottom plan views of this mechanism. In the illustrated embodiment, the manually operated mechanism operates by causing the column wheel 41 to advance one step each time the wearer of the watch actuates a push-button (referenced 13 in the figure 1 ). You can see on the figure 4A that the column wheel 41 is under the action of a pawl 55 arranged to cooperate with the teeth of the ratchet wheel 57. The pawl 55 is pivotally mounted on one of the ends of a control lever 51. When the push button 13 (not shown in the figure 4A , 4B and 4C ) is actuated, its front end moves along a straight path (indicated by the arrow A) by pushing back the control lever 51, so that the latter pivots around an axis 53. A return spring (not shown) is also provided to make the control lever 51 return to the rear, as soon as the wearer of the watch releases his pressure on the push-button 13. It can therefore be understood that each pressure exerted on the push-button has the effect of moving the pawl 55 from so as to advance the column wheel 41 by the angular value of one ratchet tooth (30°), and that the successive presses on the push-button 13 have the effect of progressively incrementing the angular position of the column wheel 41.

Conformément à l'invention, le mécanisme de réveil comporte un isolateur agencé pour neutraliser la fonction d'activation du mécanisme de réveil par le mécanisme à commande manuelle lorsque le degré d'armage du ressort-moteur est inférieur à une première valeur seuil prédéfinie. En se référant à nouveau aux figures 4A, 4B et 4C, on peut voir une première came logique 61 et un isolateur 63. La première came logique 61 est montée coaxialement sur le mobile d'arrêtage 85 (visible dans les figures 2A et 2B) de manière à ce qu'elle pivote solidairement avec ce dernier. On peut voir également que la première came logique comporte plusieurs secteurs circulaires séparés les uns des autres par des épaulements. L'isolateur 63 se présente sous la forme d'une bascule qui est pivotée autour d'un axe 65 et qui est munie d'un bec suiveur de came 67 qui est rappelé contre le profil de la première came logique 61 par un ressort qui est intégré dans l'isolateur. L'isolateur 63 est également muni d'un deuxième bec 69 prévu pour coopérer avec les colonnes 59A du second lot de colonnes de la roue à colonnes 41. Enfin, l'isolateur 63 porte une goupille 71 à son extrémité la plus éloignée de l'axe 65. On peut préciser en outre que l'isolateur 63 est agencé, par rapport à la roue à colonnes 41, de telle manière que le bec 69 se trouve en appui contre une des colonnes 59A (figures 4A et 4B) lorsque le mécanisme de réveil est dans l'état activé. Et qu'inversement, le bec 69 se trouve en regard de l'espace entre deux colonnes 59A (figure 4C) lorsque le mécanisme de réveil est dans l'état désactivé.In accordance with the invention, the alarm mechanism comprises an insulator arranged to neutralize the function of activation of the alarm mechanism by the manually operated mechanism when the degree of winding of the mainspring is less than a first predefined threshold value. Referring again to figure 4A , 4B and 4C , a first logic cam 61 and an insulator 63 can be seen. The first logic cam 61 is mounted coaxially on the stop wheel set 85 (visible in the figures 2A and 2B ) so that it pivots together with the latter. It can also be seen that the first logic cam comprises several circular sectors separated from each other by shoulders. The insulator 63 is in the form of a rocker which is pivoted around an axis 65 and which is provided with a cam follower 67 which is biased against the profile of the first logic cam 61 by a spring which is integrated in the insulator. The insulator 63 is also provided with a second spout 69 provided to cooperate with the columns 59A of the second batch of columns of the column wheel 41. Finally, the insulator 63 carries a pin 71 at its end furthest from the axis 65. 59A ( figure 4A And 4B ) when the wake-up mechanism is in the activated state. And that conversely, the beak 69 is opposite the space between two columns 59A ( Fig. 4C ) when the wake-up mechanism is in the disabled state.

En se référant d'abord à la figure 4A, on peut voir que la came logique 61 est représentée dans une position angulaire telle que le bec 67 de l'isolateur 63 se trouve en appui contre une portion de profil circulaire 61a de la came. Rappelons que la position angulaire de la came logique 61 est représentative du degré d'armage du ressort-moteur. De plus, si la came logique est tournée de manière à ce que le bec 67 de l'isolateur 63 se trouve en face de la portion de profil circulaire 61a, c'est que le degré d'armage du ressort moteur est supérieur à la première valeur seuil prédéfinie. En se référant toujours à la figure 4A, on peut voir encore que le deuxième bec 69 de l'isolateur 63 est en appui contre une des six colonnes 59A de la roue à colonnes 41. Si on se réfère maintenant à la figure 4B, on peut voir que le ressort moteur s'est au moins partiellement désarmé en faisant pivoter la came logique 61 dans le sens antihoraire. On peut comprendre que le degré d'armage du ressort moteur est maintenant inférieur à la première valeur seuil prédéfinie, puisque le bec 67 ne se trouve plus en face de la portion de profil circulaire 61a. Le bec 67 de l'isolateur 63 se trouve maintenant en regard d'une autre portion circulaire (référencée 61b) de profil de la came 61, le rayon de la portion de profil circulaire 61b étant sensiblement inférieur à celui de la portion de profil circulaire 61a. On peut observer toutefois que le bec 67 n'est pas en appui contre le profil circulaire 61b, mais qu'il est au contraire suspendu au-dessus du profil 61b. En effet, le deuxième bec 69 de l'isolateur 63 est toujours en appui contre la même colonne 59A de la roue à colonnes 41, parce que le mécanisme de réveil est toujours activé, la sonnerie étant en cours.Referring first to the figure 4A , it can be seen that the logic cam 61 is shown in an angular position such that the beak 67 of the insulator 63 is in abutment against a circular profile portion 61a of the cam. Remember that the angular position of logic cam 61 is representative of the degree of winding of the mainspring. Moreover, if the logic cam is turned so that the beak 67 of the insulator 63 is opposite the circular profile portion 61a, it means that the degree of winding of the mainspring is greater than the first predefined threshold value. Always referring to the figure 4A , it can also be seen that the second spout 69 of the insulator 63 bears against one of the six columns 59A of the column wheel 41. If we now refer to the figure 4B , it can be seen that the mainspring has at least partially disarmed by rotating the logic cam 61 counterclockwise. It can be understood that the degree of winding of the mainspring is now lower than the first predefined threshold value, since the beak 67 is no longer opposite the circular profile portion 61a. Nose 67 of insulator 63 now faces another circular profile portion (referenced 61b) of cam profile 61, the radius of circular profile portion 61b being substantially less than that of circular profile portion 61a. It can however be observed that the beak 67 is not in abutment against the circular profile 61b, but that it is on the contrary suspended above the profile 61b. Indeed, the second beak 69 of the insulator 63 is always in abutment against the same column 59A of the column wheel 41, because the alarm mechanism is always activated, the ringing being in progress.

En se référant maintenant à la figure 4C, On peut voir que le bec 69 de l'isolateur 63 est abaissé entre deux colonnes 59A de la roue à colonnes 41. On comprendra donc que le mécanisme de réveil est maintenant désactivé. Comme déjà mentionné, l'isolateur 63 porte une goupille 71 à son extrémité la plus éloignée de l'axe 65. En se référant toujours à la figure 4C, on peut voir que La goupille 71 est agencée pour maintenir le cliquet 55 du mécanisme à commande manuelle à l'écart de la roue à rochet 57 de la roue à colonnes 41. Ainsi, on peut comprendre que, lorsque l'isolateur 63 se trouve dans la position illustrée dans la figure 4C, le porteur de la montre n'a plus la possibilité d'incrémenter la roue à colonnes en actionnant le bouton-poussoir 13. Dans la position illustrée, l'isolateur 63 empêche en effet le cliquet 55 de venir en prise avec les dents de la roue à rochet 57.Referring now to the Fig. 4C , It can be seen that the spout 69 of the insulator 63 is lowered between two columns 59A of the column wheel 41. It will therefore be understood that the alarm mechanism is now deactivated. As already mentioned, the insulator 63 carries a pin 71 at its end furthest from the axis 65. Still referring to the Fig. 4C , it can be seen that the pin 71 is arranged to keep the pawl 55 of the manually operated mechanism away from the ratchet wheel 57 of the column wheel 41. Thus, it can be understood that, when the insulator 63 is in the position illustrated in the Fig. 4C , the wearer of the watch no longer has the possibility of incrementing the column wheel by activating the push-button 13. In the position illustrated, the insulator 63 in fact prevents the pawl 55 from coming into engagement with the teeth of the ratchet wheel 57.

La figure 4A représente la première came logique 61 dans la même position angulaire que dans la figure 2A. Dans cette position correspondant à la situation où le barillet est armé au maximum, le bec 67 de l'isolateur 63 est en appui contre la portion de profil circulaire 61a. Telle que représentée dans les figures 4A, 4B et 4C, la première came logique 61, qui est solidaire du mobile d'armage 85 (figure 2A et 2B), est agencée pour tourner dans le sens antihoraire lorsque le barillet se désarme. Dans ces conditions, lorsque, suite au déclenchement de la sonnerie, la première came logique 61 se met à tourner, le bec 67 de l'isolateur 63 glisse sur la portion de profil circulaire 61a jusqu'à l'épaulement 62 séparant cette portion de profil de la portion de profil 61b. Une fois l'épaulement 62 franchi, le bec 67 se trouve en regard de la portion de profil circulaire 61b dont le rayon est sensiblement inférieur à celui du profil circulaire 61a. Lorsque le mécanisme de réveil se trouve dans l'état activé, l'autre bec (le bec 69) de l'isolateur 63 est en appui contre une des colonnes 59A de la roue à colonnes 41. Dans ces conditions, l'isolateur 63 ne bascule pas lorsque le bec 67 passe de la portion de profil 61a à la portion de profil 61b puisqu'il est encore soutenu par son autre bec qui est en appui contre une des colonnes de la roue à colonnes. On comprendra de ce qui précède que l'isolateur 63 n'interfère pas avec le fonctionnement du mécanisme à commande manuelle lorsque le mécanisme de réveil est dans l'état activé. En revanche, si le porteur de la montre-bracelet désactive le réveil, en cours de sonnerie, après que le bec suiveur de came 67 a franchi l'épaulement 62, la colonne 59A s'efface. Dans ces conditions, le bec 69 est libre de s'abaisser entre deux colonnes, de sorte que l'isolateur 63 bascule dans le sens antihoraire et que le bec 67 vient en appui contre la portion de profil 61b. Conforment à ce qui a été expliqué plus haut, dans cette situation, le porteur de la montre n'a plus alors la possibilité d'incrémenter la roue à colonnes 41 en actionnant le bouton-poussoir 13. La fonction d'activation du mécanisme de réveil par le mécanisme à commande manuelle est donc neutralisée. On rappellera de plus que, conformément à ce qui a été expliqué en relation avec la figure 3C, le fait de désactiver le réveil en cours de sonnerie a également pour effet d'arrêter la sonnerie.There figure 4A represents the first logic cam 61 in the same angular position as in the figure 2A . In this position corresponding to the situation where the barrel is fully armed, the beak 67 of the insulator 63 bears against the circular profile portion 61a. As represented in the figure 4A , 4B and 4C , the first logic cam 61, which is secured to the winding mobile 85 ( figure 2A and 2B ), is arranged to rotate counter-clockwise when the barrel disarms. Under these conditions, when, following the triggering of the bell, the first logic cam 61 begins to rotate, the beak 67 of the insulator 63 slides on the circular profile portion 61a as far as the shoulder 62 separating this profile portion from the profile portion 61b. Once the shoulder 62 has been crossed, the beak 67 is opposite the circular profile portion 61b whose radius is substantially less than that of the circular profile 61a. When the alarm mechanism is in the activated state, the other beak (the beak 69) of the insulator 63 bears against one of the columns 59A of the column wheel 41. Under these conditions, the insulator 63 does not tilt when the beak 67 passes from the profile portion 61a to the profile portion 61b since it is still supported by its other beak which is resting against one of the columns of the column wheel. It will be understood from the above that the isolator 63 does not interfere with the operation of the manually operated mechanism when the wake-up mechanism is in the activated state. On the other hand, if the wearer of the wristwatch deactivates the alarm clock, during ringing, after the cam follower 67 has crossed the shoulder 62, the column 59A disappears. Under these conditions, the spout 69 is free to lower between two columns, so that the insulator 63 tilts counterclockwise and the spout 67 comes to bear against the profile portion 61b. In accordance with what has been explained above, in this situation, the wearer of the watch no longer has the possibility of incrementing the column wheel 41 by actuating the push-button 13. The function of activating the alarm mechanism by the manually operated mechanism is therefore neutralized. It will also be recalled that, in accordance with what has been explained in relation to the Fig. 3C , disabling the alarm clock that is ringing will also stop the ringing.

En se référant à nouveau à la figure 2A, on peut voir que le mobile d'arrêtage 85 représenté comporte quatre niveaux différents. Les deux niveaux inférieurs sont comme on l'a vu, une étoile 87 et une came 89 qui constituent ensemble le mobile d'arrêtage 85 proprement dit (Fig. 2B). Le troisième niveau du mobile 85 est constitué par la première came logique 61 qui, comme on l'a vu également, est fixée rigidement sur les deux premiers niveaux en position coaxiale. Enfin, le mobile d'arrêtage 85 comprend encore un quatrième niveau formé principalement d'une deuxième came logique 95 qui est montée pivotante par-dessus la première came logique 61 en position coaxiale. En se référant toujours à la figure 2A, on peut voir que la planche de la deuxième came logique est percée d'un oblong 97 qui définit un arc de cercle concentrique à l'axe de pivotement de la came. On peut voir également que la première came logique 61 porte une goupille 99 qui est agencée pour coulisser dans l'oblong 97. La présence de cet oblong permet à la deuxième came logique 95 de pivoter relativement au reste du mobile d'arrêtage 85 à l'intérieur d'un secteur dont l'étendue est limitée par les deux extrémités de l'oblong 97.Referring again to the figure 2A , it can be seen that the stop wheel set 85 represented comprises four different levels. The two lower levels are, as we have seen, a star wheel 87 and a cam 89 which together constitute the stopping mobile 85 proper ( Fig. 2B ). The third level of the mobile 85 is constituted by the first logic cam 61 which, as we have also seen, is fixed rigidly to the first two levels in the coaxial position. Finally, the stop wheel set 85 also comprises a fourth level formed mainly by a second logic cam 95 which is pivotally mounted above the first logic cam 61 in the coaxial position. Always referring to the figure 2A , it can be seen that the plate of the second logic cam is pierced with an oblong 97 which defines an arc of a circle concentric with the pivot axis of the cam. It can also be seen that the first logic cam 61 carries a pin 99 which is arranged to slide in the oblong 97. The presence of this oblong allows the second logic cam 95 to pivot relative to the rest of the stop wheel set 85 inside a sector whose extent is limited by the two ends of the oblong 97.

Conformément au mode de réalisation de l'invention qui fait l'objet de la présente description, le mécanisme de réveil comporte un système automatique agencé pour le désactiver lorsque le ressort-moteur s'est désarmé jusqu'au-dessous d'une deuxième valeur seuil prédéfinie, la deuxième valeur seuil étant inférieure à la première valeur seuil. Les figures 5A, 5B et 5C sont des vues schématiques en plan illustrant trois phases du fonctionnement du système automatique susmentionné. En se référant aux trois figures susmentionnées, on peut voir que la deuxième came logique 95, qui est montée sur le mobile d'armage 85, comporte une portion de profil 111 à rayon constant et une portion de profil 115 en creux. Les trois figures montrent également la roue à colonnes 41 avec sa roue à rochet 57 immobilisée par le sautoir 58, et une bascule 103 à déclenchement instantané qui est pivotée par une de ses extrémités autour d'un axe 105. On peut voir de plus que la bascule à déclenchement instantané porte un cliquet 109 qui est prévu pour actionner la roue à rochet 57 de la roue à colonnes 41, et qui est fixé à l'extrémité de la bascule 103 la plus éloignée de l'axe de pivotement 105. Enfin, la bascule à déclenchement instantané est également munie d'une roulette 107 qui est rappelée contre la deuxième came logique 95 par un ressort de rappel 113.In accordance with the embodiment of the invention which is the subject of the present description, the alarm mechanism comprises an automatic system arranged to deactivate it when the mainspring is disarmed to below a second predefined threshold value, the second threshold value being lower than the first threshold value. THE Figures 5A, 5B And 5C are schematic plan views illustrating three phases of operation of the aforementioned automatic system. Referring to the three aforementioned figures, it can be seen that the second logic cam 95, which is mounted on the winding wheel set 85, comprises a profile portion 111 with a constant radius and a profile portion 115 which is recessed. The three figures also show the column wheel 41 with its ratchet wheel 57 immobilized by the jumper 58, and an instantaneous trigger rocker 103 which is pivoted by one of its ends around an axis 105. It can further be seen that the instantaneous trigger rocker carries a pawl 109 which is provided to actuate the ratchet wheel 57 of the column wheel 41, and which is fixed to the end of the rocker 103 the furthest from the pivot axis 105. Finally, the instantaneous release rocker is also provided with a roller 107 which is biased against the second logic cam 95 by a return spring 113.

La configuration illustrée dans la figure 5A correspond à la situation où le ressort de barillet est armé au maximum. On peut voir que dans cette configuration, la roulette 107 est en appui contre la portion de profil 111 à rayon constant de la came 95. Ensuite, lorsque le mécanisme de sonnerie se déclenche et que le ressort de barillet se désarme en l'entraînant, le mobile d'arrêtage 85 effectue successivement deux pas de 30° dans le sens horaire. Durant le premier pas de 30°, la deuxième came logique 95 est solidaire en rotation du reste du mobile d'arrêtage 85. En effet, la goupille 99 se trouve alors à une extrémité de l'oblong 97, et elle empêche la deuxième came logique 95 de pivoter relativement au reste du mobile d'arrêtage 85 dans le sens antihoraire. Dans ces conditions, la roulette 107 roule contre la portion de profil 111 à rayon constant.The configuration shown in figure 5A corresponds to the situation where the mainspring is fully charged. It can be seen that in this configuration, the wheel 107 bears against the profile portion 111 with a constant radius of the cam 95. Then, when the striking mechanism is triggered and the mainspring is disarmed by dragging it, the mobile stopper 85 successively performs two steps of 30° clockwise. During the first step of 30°, the second logic cam 95 is integral in rotation with the rest of the mobile stopper 85. Indeed, the pin 99 is then at one end of the oblong 97, and it prevents the second logic cam 95 from pivoting relative to the rest of the mobile stopper 85 counterclockwise. Under these conditions, the wheel 107 rolls against the profile portion 111 with a constant radius.

A un certain moment durant le second pas de 30°, la roulette 107 arrive à l'extrémité de la portion de profil 111 à rayon constant (cette situation est montrée dans la figure 5B). En se référant plus particulièrement à cette figure, on peut comprendre qu'à l'instant où le point de contact entre la roulette 107 et la came 95 quitte la portion de profil à rayon constant, la force avec laquelle la roulette 107 presse contre le profil de la deuxième came logique 95 cesse d'être orientée radialement, mais s'oriente au contraire de manière à pousser la came 95 à pivoter dans le sens horaire. La roulette 107 plonge soudainement dans la portion de profil en creux 115 en faisant pivoter dans le sens antihoraire la bascule 103 à déclenchement instantané. Lorsque la bascule 103 pivote, le cliquet 109 est entraîné en suivant une direction tangente à la roue à rochet 57, de sorte que le cliquet 109 vient en prise avec une dent du rochet et incrémente d'un pas la roue à colonnes 41. Le résultat de cette incrémentation est de désactiver le mécanisme de réveil.At a certain moment during the second 30° pitch, the roller 107 arrives at the end of the profile portion 111 with a constant radius (this situation is shown in the figure 5B ). Referring more particularly to this figure, it can be understood that at the instant when the point of contact between the roller 107 and the cam 95 leaves the constant radius profile portion, the force with which the roller 107 presses against the profile of the second logic cam 95 ceases to be oriented radially, but on the contrary is oriented so as to push the cam 95 to pivot clockwise. The caster 107 suddenly plunges into the recessed section portion 115 by pivoting the instant trigger rocker 103 counterclockwise. As rocker 103 pivots, pawl 109 is driven in a direction tangent to ratchet wheel 57, so that pawl 109 engages a tooth of the ratchet and increments column wheel 41. The result of this increment is to deactivate the alarm mechanism.

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

Claims (11)

  1. Alarm clock mechanism for a mechanical timepiece able to be in either an activated state or a deactivated state, and comprising:
    - a striking mechanism;
    - a motor spring (15) arranged to unwind and thus drive the striking mechanism following triggering of the latter;
    - a manual control mechanism (13, 51, 55, 41) arranged to alternately activate and deactivate the alarm clock mechanism;
    - a triggering system (21, 25, 29, 31, 33) comprising a cam (21) kinematically connected to the movement, and arranged to trigger the striking mechanism at a preprogrammed time if the alarm clock mechanism is in the activated state;
    - an adjusting system (11, 3, 5) enabling the programmed time for the triggering of the striking mechanism to be programmed manually and indicated;
    characterised in that it further comprises an lifting-lever (63) arranged to cancel the activation function of the alarm clock mechanism by the manual control mechanism (13, 51, 55, 41), when the degree of winding of the motor spring (15) is less than a predefined first threshold value.
  2. Alarm clock mechanism as claimed in claim 1, characterised in that it comprises an activation indicator member (7) arranged to indicate whether the alarm clock mechanism is in the activated state or in the deactivated state.
  3. Alarm clock mechanism as claimed in claim 1 or 2, characterised in that the lifting-lever (63) is arranged so as not to interfere with the operation of the manual control mechanism (13, 51, 55, 41) when the alarm clock mechanism is in the activated state, so that the lifting-lever (63) cancels only the activation function and does not cancel the deactivation function of the alarm clock mechanism by the manual control mechanism.
  4. Alarm clock mechanism as claimed in any one of claims 1, 2 and 3, characterised in that it comprises a striking barrel in which the motor spring (15) is mounted, as well as a mobile (85) arranged to be driven by the striking barrel so that the angular position of the mobile (85) is representative of the degree of winding of the motor spring (15), and in that the lifting-lever (63) is arranged so as to cancel the activation function when the angular position of the mobile (85) is within a predefined interval.
  5. Alarm clock mechanism as claimed in claim 4, characterised in that it comprises a first logic cam (61) connected for conjoint rotation to the mobile (85), in that the lifting-lever (63) is formed by a lever arm able to move between a retracted position and an acting position, the first logic cam (61) being arranged to cooperate with the lifting-lever (63) so as to cause the lifting-lever (63) to pivot into the acting position when the degree of winding of the motor spring (15) falls below the predefined first threshold value, the lifting-lever (63) being arranged to cancel the activation function when it is in the acting position.
  6. Alarm clock mechanism as claimed in any one of the preceding claims, characterised in that it comprises a control lever arm (35) arranged to pivot between a first position and a second position, in that the alarm clock mechanism is in the activated state when the lever arm is in the first position and in the deactivated state when the lever arm is in the second position, and in that the manual control mechanism (13, 51, 55, 41) comprises a pusher (13) arranged to cause the control lever arm (35) to switch from the first to the second position and vice versa.
  7. Alarm clock mechanism as claimed in claim 6, characterised in that the manual control mechanism (13, 51, 55, 41) comprises a two-time column wheel (41) and a pawl (55) arranged to be actuated by the pusher (13) so as to drive the column wheel (41) in a stepping manner, and in that the control lever arm (35) comprises a beak (39) which is returned against the columns (59) of the column wheel (41) so that the control lever arm (35) alternately switches between the first and the second position when the column wheel (41) is incremented.
  8. Alarm clock mechanism as claimed in claims 5 and 7, characterised in that the pawl (55) is free to cooperate with the column wheel (41) when the lifting-lever (63) is in the retracted position, and in that the lifting-lever (63) keeps the pawl (55) spaced apart from the column wheel (41) when it is in the acting position.
  9. Alarm clock mechanism as claimed in any one of the preceding claims, characterised in that it comprises an automatic device (103, 107, 109) arranged to deactivate the alarm clock mechanism and to stop the striking when the driving of the striking mechanism causes the motor spring (15) to unwind to below a predefined second threshold value, the second threshold value being lower than the first threshold value.
  10. Alarm clock mechanism as claimed in claim 9, characterised in that the automatic mechanism (95, 103, 107, 109) comprises a second logic cam (95) borne by the mobile (85) in a coaxial position, a lever arm (103), a cam follower (107) arranged to cooperate with the second logic cam (95), and a pawl (109), the cam follower (107) and the pawl (109) being borne by the lever arm (103) and arranged so that the pawl (109) cooperates with the column wheel (41) to cause the latter to advance by one step when the second logic cam (95) causes the cam follower (107) and the lever arm (103) to move from a first to a second angular position.
  11. Alarm clock mechanism as claimed in claim 10, characterised in that the second logic cam (95) is pivotably mounted on the mobile (85) so as to be free to turn by a limited angle coaxially to the mobile (85), and in that the cam follower (107) comprises a disc, the disc being arranged to roll against the second logic cam (95) and to thrust forwards thus driving the pawl (109) when it reaches an abrupt indent on the second logic cam (95).
EP19744846.7A 2018-06-20 2019-06-07 Alarm clock mechanism and timepiece comprising such a mechanism Active EP3811158B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP18178908 2018-06-20
PCT/IB2019/054754 WO2019243940A1 (en) 2018-06-20 2019-06-07 Alarm clock mechanism and timepiece comprising such a mechanism

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Publication Number Publication Date
EP3811158A1 EP3811158A1 (en) 2021-04-28
EP3811158B1 true EP3811158B1 (en) 2023-07-26

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Application Number Title Priority Date Filing Date
EP19744846.7A Active EP3811158B1 (en) 2018-06-20 2019-06-07 Alarm clock mechanism and timepiece comprising such a mechanism

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EP (1) EP3811158B1 (en)
WO (1) WO2019243940A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4050426A1 (en) 2021-02-26 2022-08-31 Patek Philippe SA Genève Timepiece device comprising a rocker for inactivation of a function and timepiece comprising such a device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1394637B1 (en) * 2002-08-27 2006-04-26 Frédéric Piguet S.A. Timepiece, in particular wristwatch, comprising an alarm mechanism
EP1533666A1 (en) * 2003-11-12 2005-05-25 Frédéric Piguet S.A. Watch comprising an alarm mechanism
EP2226688B1 (en) * 2009-03-05 2011-09-07 Vaucher Manufacture Fleurier S.A. Timepiece

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WO2019243940A1 (en) 2019-12-26

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