EP2485097A2 - Striking mechanism of a watch with blocking of the hammer - Google Patents

Striking mechanism of a watch with blocking of the hammer Download PDF

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Publication number
EP2485097A2
EP2485097A2 EP11193259A EP11193259A EP2485097A2 EP 2485097 A2 EP2485097 A2 EP 2485097A2 EP 11193259 A EP11193259 A EP 11193259A EP 11193259 A EP11193259 A EP 11193259A EP 2485097 A2 EP2485097 A2 EP 2485097A2
Authority
EP
European Patent Office
Prior art keywords
hammer
spring
stamp
arm
free end
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP11193259A
Other languages
German (de)
French (fr)
Other versions
EP2485097A3 (en
EP2485097B1 (en
Inventor
Eric Goeller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Montres Breguet SA
Original Assignee
Montres Breguet SA
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Filing date
Publication date
Application filed by Montres Breguet SA filed Critical Montres Breguet SA
Publication of EP2485097A2 publication Critical patent/EP2485097A2/en
Publication of EP2485097A3 publication Critical patent/EP2485097A3/en
Application granted granted Critical
Publication of EP2485097B1 publication Critical patent/EP2485097B1/en
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Anticipated expiration legal-status Critical

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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B23/00—Arrangements producing acoustic signals at preselected times
    • G04B23/02—Alarm clocks
    • G04B23/026—Hammer driving; hammers; devices with several hammers or sounding bodies; vibrators
    • 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
    • G04B21/00—Indicating the time by acoustic means
    • G04B21/02—Regular striking mechanisms giving the full hour, half hour or quarter hour
    • G04B21/06—Details of striking mechanisms, e.g. hammer, fan governor
    • 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
    • G04B21/00—Indicating the time by acoustic means
    • G04B21/02—Regular striking mechanisms giving the full hour, half hour or quarter hour
    • G04B21/10—Releasing or locking the regular stroke, e.g. for silence during the night
    • 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
    • G04B23/12—Alarm watches to be worn in pockets or on the wrist

Definitions

  • the invention relates to a bell striking mechanism provided with a hammer locking device.
  • the mechanism comprises at least one hammer arranged to strike at least one stamp attached to a stamp holder at specific times. Said hammer is kept away from the stamp by a damper counter-spring in a rest mode while being blocked by the locking device.
  • a hammer driving spring of the mechanism may be configured as a resilient beam or blade. This drive spring may be cocked to drive said hammer against the bell in a bell mode, to acoustically signal for example a programmed time period.
  • a striking mechanism can be combined with a traditional watch movement to serve in particular for minute repetitions or to signal a programmed alarm time.
  • Such striking mechanism generally comprises at least one stamp made of sapphire, quartz or metal material, such as steel, bronze, precious metal or metal glass.
  • This stamp can describe for example at least a portion of a circle around the watch movement in the watch cage.
  • the stamp is fixed by at least one of its ends to a stamp holder, which is itself secured to a watch plate.
  • a hammer mechanism is rotatably mounted on the plate for example near the stamp holder so as to hit the stamp to make it vibrate.
  • the sound produced by the hammer-struck tone is particularly in the audible frequency range from 1 kHz to 20 kHz. This makes it possible to signal to the wearer of the watch, a definite time, a programmed alarm or a minute repetition.
  • the striking mechanism of a watch may comprise two or more stamps attached by one of their ends to a same stamp holder, which is itself secured to a plate.
  • Each stamp may be struck by a respective hammer.
  • each hammer is driven by a proper drive spring, which had to be armed first, so as to drive the hammer against the stamp, to signal a minute repeater or an alarm time.
  • Two damping counter-springs are each provided for pushing and holding the two hammers away from the stamps in a rest mode. In a bell mode, the shock-absorbing counter-springs act with a large force to slow the fall of each hammer before striking against the respective timbre. These counter-springs make it possible, following the striking, to push each hammer towards their rest position.
  • Eccentrics are also provided for adjusting the operation of the counter-springs to essentially prevent any rebound of each hammer against the respective stamp.
  • a disadvantage of such a structure of the striking mechanism with these counter-springs is that there is a significant loss of kinetic energy of the hammer during the striking of the respective stamp, which reduces the acoustic level of the ring. This loss of energy is largely due to the slowdown imposed by each counter-spring on the path of the hammer when it hits the stamp. Moreover, even if the pre-arming of the drive springs is increased, this implies an adaptation of the counter-springs via their eccentric to also avoid any rebound, which is another disadvantage of such a striking mechanism.
  • a striking mechanism provided with at least one stamp and a hammer capable of striking the stamp at determined times.
  • This striking mechanism further comprises a control device which allows on the one hand to provide a visual indication on the active or inactive state the mechanism, and secondly to block or unblock the hammer via a push-button.
  • a control device which allows on the one hand to provide a visual indication on the active or inactive state the mechanism, and secondly to block or unblock the hammer via a push-button.
  • the invention therefore aims to overcome the drawbacks of the state of the art mentioned above by providing a striking mechanism of a watch, which comprises a hammer locking device in order to avoid any rebound of the hammer against the hammer. stamp after a first strike in a ring mode and without significant loss of energy when the hammer falls against the stamp.
  • the invention relates to a striking mechanism of a watch, which comprises the features defined in the independent claim 1.
  • An advantage of the striking mechanism according to the present invention lies in the fact that it comprises a locking device provided with at least one lock, which blocks the hammer in a rest mode or following the first strike of the hammer against the hammer.
  • stamp in a ring mode.
  • the latch may comprise a hook to hook in particular on a notch made at the periphery of the rotary hammer.
  • the hook of the lock is moved away from the periphery of the hammer to no longer be able to directly block said hammer.
  • the hammer is driven towards the stamp to hit it a first time before the latch with a delay time is applied against the periphery of the hammer to block it. With this, there is no rebound of the hammer against the stamp, and the counter-spring no longer needs to provide a significant force on the hammer to bring it back to the rest position and keep it away from the stamp in the rest mode.
  • FIG 1 it is represented in a simplified manner a striking mechanism 1 of a watch.
  • the various parts of the striking mechanism 1 are mounted normally on a deck or bridge not shown to avoid overloading the figure 1 .
  • the plate is normally above the various elements represented by the striking mechanism, while part of the bridge is below the elements shown, being also fixed on the plate.
  • the striking mechanism 1 comprises at least one stamp 2, which is fixed at one of its ends to a stamp holder 3.
  • This stamp holder can in principle be integral with the watch plate not shown, but can also be secured to an inner part of the housing.
  • the other end of the stamp 2, not shown, is generally free movement.
  • the patch 2 may be in the form of at least a portion of a circle or rectangle around the watch movement.
  • the stamp may be for example a wire of circular or rectangular cross section, which is usually steel or precious metal or metal glass or other material.
  • the striking mechanism 1 further comprises at least one hammer 4 rotatably mounted about an axis 14 between a plate and a bridge not shown. This hammer is preferably mounted near the stamp holder 3.
  • the striking mechanism 1 also comprises a damping counter-spring 5 and a driving spring 6 of the hammer.
  • the damper counter-spring 5 makes it possible to keep the hammer 4 at a distance from the stamp 2 in a rest mode and to push it back to its rest position in a ringing mode.
  • the damper counter-spring 5 and the drive spring 6 are in the form of an elastic blade.
  • One end 25 of the counter spring 5 and one end 26 of the drive spring 6 are fixed on the deck or the deck not shown.
  • a free end of the counter-spring 5 maintains the hammer 4 away from the stamp 2 by means of a rod 9 fixed through a portion of the hammer between the axis of rotation 14 and the impact portion of the hammer.
  • the drive spring 6 may be cocked to drive the hammer in a bell mode toward the tone 2 to produce an acoustic sound.
  • the drive spring 6 is pre-armed by means of a lift 12, which is rotatably mounted on the axis of rotation 14 of the hammer 4.
  • This lift 12 has a visible tooth on the figure 1 which is normally activated by a toothed wheel, not shown, rotatably mounted on the plate or the bridge.
  • the lift 12 drives the rod 9 of the hammer 4 to rotate it about its axis of rotation 14 in a counterclockwise direction according to the figure 1 .
  • the hammer 4 further comprises a pin 10, which is fixed in a hammer opening in an end portion opposite to the impact portion relative to the axis of rotation 14.
  • This pin 10 is preferably arranged parallel to the rotation axis 14 and does not extend mainly that of a lower side of the hammer.
  • the striking mechanism further comprises according to the invention a device for locking the hammer.
  • This blocking device which will be explained in more detail below, in particular with reference to Figures 2a to 2c essentially comprises a latch 8.
  • This latch 8 is rotatably mounted on an axis of rotation 18 between the bridge and the plate, which may be parallel to the axis of rotation 14 of the hammer 4.
  • This latch 8 comprises a first arm 8a, which can be arched.
  • This first arm 8a is provided at its free end with a fastening element in the form of a hook 28.
  • This hook is intended to catch on or lean against a hooking means, which is a notch 15 made on a lateral surface at the periphery of the end portion of the hammer 4 opposite to the impact portion.
  • the notch 15 may be a flat disposed at a right angle or an acute angle from the lateral surface of the hammer to ensure a locking of the hammer by means of the hook 28 of the first arm 8a.
  • the latch 8 further comprises a second arm 8b, which can be arranged parallel to the first arm 8a and also be of the same arcuate shape.
  • the free end of this second arm 8b comprises a portion in the form of a ramp against which comes to rest a complementary leaf spring 6 'of the drive spring 6.
  • This spring blade 6' comes of material with the main blade of the drive spring 6, which is made of spring steel.
  • this complementary spring blade 6 'of the locking device is parallel to the main blade of the drive spring 6 with the free end of the complementary spring blade slightly set back from the free end of the main blade of the spring of 'training.
  • the locking device also comprises a latch spring 7 in the form of a latch, which is rotatably mounted about an axis of rotation 17 on the bridge, for example being parallel to the axis of rotation 14 of the hammer 4.
  • the spring of latch 7 comprises an elastic blade, a first free end bears on a portion of the drive spring 6 to be able to generate a return force in the direction of clockwise.
  • the latch spring 7 further comprises a portion of a second end near the axis of rotation 17. The border of this end portion of the latch spring 7 has the function of pushing the second arm 8b away from the periphery of the hammer, when the complementary leaf spring 6 'is no longer in contact with the ramp of the second arm 8b.
  • the end portion of the latch spring 7 further comprises an arcuate groove to receive the pin 10 of the hammer 4, when the hammer strikes the first time the stamp.
  • the end portion of the lock spring 7 maintains the second arm 8b, as well as the first arm 8a away from the periphery of the hammer 4.
  • the hook 28 of the first arm 8a can not yet catch on the notch 15 of the hammer, because the end portion of the latch spring 7 always keeps the second arm 8b at a distance.
  • the complementary spring blade 6 'comes into contact with the ramp of the second arm during the driving of the hammer, but without having sufficient force to allow the second arm 8b to be pushed directly towards the periphery of the hammer for a locking of the hammer. .
  • This force is also dependent on the inclination of the ramp, which can be adapted.
  • the hook 28 of the first arm 8a thus bears against the notch 15 of the hammer after the first knock against the stamp, when the hammer is pushed by the counter spring 5 in the rest position.
  • the end portion Upon returning to the rest position of the hammer 4, the end portion has no more force to push the second arm 8b away from the hammer, given the contact of the end of the complementary leaf spring 6 ' on the ramp.
  • the hammer is thus locked directly following a single strike against the stamp without subsequent rebound, which is sought by the invention.
  • the reaction force of the counter spring 5 no longer needs to be important to bring the hammer back in the rest position following the stamp strike.
  • a force of the order of 0.1 N of the counter spring 5 is sufficient to bring the hammer back to the rest position according to the invention with the above-mentioned blocking device.
  • the counter spring should in principle push the hammer with a force of about 3 N to avoid rebound.
  • the prearranged drive spring normally generates a force of the order of 1 N to push the hammer toward the stamp.
  • FIGs 2a to 2c represent enlarged views of the mechanism at the blocking device, the elements of which are shown from below relative to the figure 1 .
  • the figure 2a represents the striking mechanism in a rest position with the latch 8 of the locking device, which blocks the hammer 4.
  • the figure 2b represents an initial position of the ring mode with the preassembled training spring.
  • the Figure 2c represents the moment of the first striking of the hammer 4 against the stamp with the first and second arms 8a and 8b driven to come into contact with the periphery of the hammer, but before the blocking of the hammer.
  • the striking mechanism is in a rest mode.
  • the latch 8 of the locking device makes it possible to keep the hammer 4 locked.
  • the latch which is rotatably mounted about an axis of rotation 18, preferably perpendicular to the plate, comprises a first arm 8a and a second arm 8b of equivalent general shape and arranged parallel to the first arm.
  • the first arm 8a comprises at one end a hook 28, which is at the figure 2a , against or hooked on a notch 15 of the hammer 4.
  • the second arm 8b is pushed towards the periphery of the hammer by means of the complementary spring blade 6 'in contact with a ramp 30 of the second arm.
  • the complementary leaf spring 6 pushhes the second arm against a force repulsion generated by a wedge 26 of the end portion of the latch spring 7, which acts against an edge 29 of the end of the second arm 8b.
  • the latch spring 7 via its wedge 26 does not generate a sufficient force with respect to the force of the leaf of the complementary spring 6 'to push through the ramp 30, the second arm 8b with the first arm 8a away from the periphery of the hammer 4.
  • the friction force of the complementary leaf spring 6 'on the ramp 30, as well as the inclination of the ramp also plays a role in maintaining this blocking position hammer in this mode of rest.
  • the end of the counter spring 5 is in principle in contact with the rod 9 of the hammer.
  • the lift 12, which is rotatably mounted about the axis of rotation 14 of the hammer 4, is pushed against the rod 9 by the not shown lifting spring.
  • the free end of the drive spring 6 is not in contact with the pin 10, which is also not in contact in a circular groove 27 of the end portion of the lock spring 7.
  • the figure 2b represents precisely the initial position of the ring mode with the drive spring 6 pre-cocked.
  • the free end of the counter-spring 5 is no longer in contact with the rod 9 due to the rotation of the lift 12 imposed by the toothed wheel to a maximum position.
  • the pin 10 holds the drive spring 6 in a pre-armed state.
  • the complementary spring blade 6 ' is no longer in contact with the ramp 30 and the wedge 26 has pushed the edge 29 of the second arm 8b towards the outside of the periphery of the hammer 4. In this condition, the force generated by the resilient blade bending of the latch spring 7 resting on the drive spring 6 becomes minimal.
  • any rebound of the hammer against the stamp is thus avoided. It is therefore not also necessary to provide the striking mechanism with a counter-spring pushing with great force the hammer to its rest position.
  • the counter-spring force can be minimal, which provides the advantage that a minimal loss of kinetic energy of the hammer is noted, when struck against the timbre to produce a sufficient sound level sound.
  • the complementary spring blade can be fixed by screwing or welding to the main blade of the drive spring after its completion.
  • the lock spring can be arranged around the axis of rotation of the lock.
  • the lock may comprise only one arm with at least one end with a hook and bearing elements of the complementary spring blade and possibly the latch spring.
  • the lock can be arranged in a locking position or a release position of the hammer by a rectilinear movement.
  • the hammer can be arranged to move rectilinearly to hit the stamp.
  • the pin and / or pin of the hammer can be made directly into the material of the hammer in one piece.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Electromechanical Clocks (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Springs (AREA)

Abstract

The mechanism (1) has a damper counter spring (5) that keeps the hammer at a distance from the gong (2) in an idle mode. A locking device is provided with one bolt. The hammer (4) is intended to lock with the locking device in an idle mode, and locking device to be moved away from the hammer in a strike mode. The locking device is arranged such that the drive spring drives the hammer to strike the gong before the bolt locks the hammer in the idle position.

Description

L'invention concerne un mécanisme de sonnerie d'une montre muni d'un dispositif de blocage du marteau. Le mécanisme comprend au moins un marteau agencé pour venir frapper au moins un timbre fixé à un porte-timbre à des instants déterminés. Ledit marteau est maintenu à distance du timbre par un contre-ressort amortisseur dans un mode de repos tout en étant bloqué par le dispositif de blocage. Un ressort d'entraînement du marteau du mécanisme peut être configuré sous forme d'une poutre ou lame élastique. Ce ressort d'entraînement peut être armé pour entraîner ledit marteau contre le timbre dans un mode de sonnerie, pour signaler acoustiquement par exemple une période de temps programmée.The invention relates to a bell striking mechanism provided with a hammer locking device. The mechanism comprises at least one hammer arranged to strike at least one stamp attached to a stamp holder at specific times. Said hammer is kept away from the stamp by a damper counter-spring in a rest mode while being blocked by the locking device. A hammer driving spring of the mechanism may be configured as a resilient beam or blade. This drive spring may be cocked to drive said hammer against the bell in a bell mode, to acoustically signal for example a programmed time period.

Dans le domaine de l'horlogerie, un mécanisme de sonnerie peut être combiné à un mouvement horloger traditionnel pour servir notamment de répétitions minutes ou pour signaler une heure d'alarme programmée. Un tel mécanisme de sonnerie comprend généralement au moins un timbre réalisé en saphir, en quartz ou en matériau métallique, tel qu'en acier, en bronze, en métal précieux ou en verre métallique. Ce timbre peut décrire par exemple au moins une portion de cercle autour du mouvement horloger dans la cage de montre. Le timbre est fixé par au moins une de ses extrémités à un porte-timbre, qui est lui-même solidaire d'une platine de montre. Un marteau du mécanisme est monté rotatif sur la platine par exemple à proximité du porte-timbre de manière à frapper le timbre pour le faire vibrer. Le son produit par le timbre frappé par le marteau se situe notamment dans la gamme de fréquences audibles de 1 kHz à 20 kHz. Cela permet de signaler au porteur de la montre, une heure bien définie, une alarme programmée ou une répétition minute.In the field of horology, a striking mechanism can be combined with a traditional watch movement to serve in particular for minute repetitions or to signal a programmed alarm time. Such striking mechanism generally comprises at least one stamp made of sapphire, quartz or metal material, such as steel, bronze, precious metal or metal glass. This stamp can describe for example at least a portion of a circle around the watch movement in the watch cage. The stamp is fixed by at least one of its ends to a stamp holder, which is itself secured to a watch plate. A hammer mechanism is rotatably mounted on the plate for example near the stamp holder so as to hit the stamp to make it vibrate. The sound produced by the hammer-struck tone is particularly in the audible frequency range from 1 kHz to 20 kHz. This makes it possible to signal to the wearer of the watch, a definite time, a programmed alarm or a minute repetition.

Comme représenté dans le document de brevet EP 1 574 917 A1 , le mécanisme de sonnerie d'une montre peut comprendre deux timbres ou plus fixés par une de leurs extrémités à un même porte-timbre, qui est lui-même solidaire d'une platine. Chaque timbre peut être frappé par un marteau respectif. Pour ce faire, chaque marteau est entraîné par un propre ressort d'entraînement, qui a dû au préalable être armé, de manière à entraîner le marteau contre le timbre, afin de signaler une répétition minute ou une heure d'alarme. Deux contre-ressorts amortisseurs sont prévus chacun pour repousser et maintenir les deux marteaux à distance des timbres dans un mode de repos. Dans un mode de sonnerie, les contre-ressorts amortisseurs agissent avec une force importante pour ralentir la chute de chaque marteau avant la frappe contre le timbre respectif. Ces contre-ressorts permettent suite à la frappe de repousser chaque marteau vers leur position de repos. Des excentriques sont également prévus pour le réglage du fonctionnement des contre-ressorts pour éviter essentiellement tout rebond de chaque marteau contre le timbre respectif.As shown in the document EP Patent 1,574,917 A1 , the striking mechanism of a watch may comprise two or more stamps attached by one of their ends to a same stamp holder, which is itself secured to a plate. Each stamp may be struck by a respective hammer. To do this, each hammer is driven by a proper drive spring, which had to be armed first, so as to drive the hammer against the stamp, to signal a minute repeater or an alarm time. Two damping counter-springs are each provided for pushing and holding the two hammers away from the stamps in a rest mode. In a bell mode, the shock-absorbing counter-springs act with a large force to slow the fall of each hammer before striking against the respective timbre. These counter-springs make it possible, following the striking, to push each hammer towards their rest position. Eccentrics are also provided for adjusting the operation of the counter-springs to essentially prevent any rebound of each hammer against the respective stamp.

Un inconvénient d'une telle structure du mécanisme de sonnerie avec ces contre-ressorts est qu'il se produit une perte importante d'énergie cinétique du marteau lors de la frappe du timbre respectif, ce qui réduit le niveau acoustique de la sonnerie. Cette perte d'énergie est due en grande partie par le ralentissement imposé par chaque contre-ressort sur le trajet du marteau lors de sa frappe contre le timbre. De plus même si le préarmage des ressorts d'entraînement est augmenté, cela implique une adaptation des contre-ressorts par l'intermédiaire de leur excentrique pour éviter également tout rebond, ce qui est un autre inconvénient d'un tel mécanisme de sonnerie.A disadvantage of such a structure of the striking mechanism with these counter-springs is that there is a significant loss of kinetic energy of the hammer during the striking of the respective stamp, which reduces the acoustic level of the ring. This loss of energy is largely due to the slowdown imposed by each counter-spring on the path of the hammer when it hits the stamp. Moreover, even if the pre-arming of the drive springs is increased, this implies an adaptation of the counter-springs via their eccentric to also avoid any rebound, which is another disadvantage of such a striking mechanism.

Dans le document de brevet EP 1 394 637 A1 , il est décrit également un mécanisme de sonnerie muni d'au moins un timbre et d'un marteau susceptible de venir frapper le timbre en des instants déterminés. Ce mécanisme de sonnerie comprend encore un dispositif de commande qui permet d'une part de fournir une indication visuelle sur l'état actif ou inactif du mécanisme, et d'autre part de bloquer ou débloquer le marteau par l'intermédiaire d'un bouton-poussoir. Lorsque le marteau est dans un état débloqué dans un mode de sonnerie, rien n'est prévu pour éviter tout rebond du marteau contre le timbre suite à la première frappe du marteau contre le timbre, ce qui constitue un inconvénient.In the document EP Patent 1 394 637 A1 , there is also described a striking mechanism provided with at least one stamp and a hammer capable of striking the stamp at determined times. This striking mechanism further comprises a control device which allows on the one hand to provide a visual indication on the active or inactive state the mechanism, and secondly to block or unblock the hammer via a push-button. When the hammer is in an unlocked state in a ring mode, nothing is provided to prevent any rebound of the hammer against the stamp after the first hammer strike against the stamp, which is a drawback.

L'invention a donc pour but de pallier aux inconvénients de l'état de la technique susmentionné en fournissant un mécanisme de sonnerie d'une montre, qui comprend un dispositif de blocage du marteau dans le but d'éviter tout rebond du marteau contre le timbre suite à une première frappe dans un mode de sonnerie et sans perte importante d'énergie lors de la chute du marteau contre le timbre.The invention therefore aims to overcome the drawbacks of the state of the art mentioned above by providing a striking mechanism of a watch, which comprises a hammer locking device in order to avoid any rebound of the hammer against the hammer. stamp after a first strike in a ring mode and without significant loss of energy when the hammer falls against the stamp.

A cet effet, l'invention concerne un mécanisme de sonnerie d'une montre, qui comprend les caractéristiques définies dans la revendication indépendante 1.For this purpose, the invention relates to a striking mechanism of a watch, which comprises the features defined in the independent claim 1.

Des formes d'exécution particulières du mécanisme de sonnerie d'une montre sont définies dans les revendications dépendantes 2 à 15.Particular embodiments of the striking mechanism of a watch are defined in dependent claims 2 to 15.

Un avantage du mécanisme de sonnerie selon la présente invention, réside dans le fait qu'il comprend un dispositif de blocage muni d'au moins un verrou, qui bloque le marteau dans un mode de repos ou suite à la première frappe du marteau contre le timbre dans un mode de sonnerie. Le verrou peut comprendre un crochet pour s'accrocher notamment sur un cran réalisé en périphérie du marteau rotatif. Lors de l'armage du ressort d'entraînement dans un mode de sonnerie, le crochet du verrou est éloigné de la périphérie du marteau pour ne plus être en mesure directement de bloquer ledit marteau. Suite à l'armage du ressort, le marteau est entraîné en direction du timbre pour venir le frapper une première fois avant que le verrou avec un temps de retard soit appliqué contre la périphérie du marteau pour le bloquer. Grâce à cela, il n'y a pas de rebond du marteau contre le timbre, et le contre-ressort n'a plus besoin de fournir une force importante sur le marteau pour le ramener en position de repos et le maintenir à distance du timbre dans le mode de repos.An advantage of the striking mechanism according to the present invention lies in the fact that it comprises a locking device provided with at least one lock, which blocks the hammer in a rest mode or following the first strike of the hammer against the hammer. stamp in a ring mode. The latch may comprise a hook to hook in particular on a notch made at the periphery of the rotary hammer. When winding the driving spring in a ringing mode, the hook of the lock is moved away from the periphery of the hammer to no longer be able to directly block said hammer. Following the winding of the spring, the hammer is driven towards the stamp to hit it a first time before the latch with a delay time is applied against the periphery of the hammer to block it. With this, there is no rebound of the hammer against the stamp, and the counter-spring no longer needs to provide a significant force on the hammer to bring it back to the rest position and keep it away from the stamp in the rest mode.

Les buts, avantages et caractéristiques du mécanisme de sonnerie d'une montre apparaîtront mieux dans la description suivante notamment en regard des dessins sur lesquels :

  • la figure 1 représente de manière simplifiée une vue tridimensionnelle de certaines parties du mécanisme de sonnerie muni du dispositif de blocage du marteau selon l'invention, et
  • les figures 2a à 2c représentent des vues agrandies en plan de différentes positions depuis un mode de repos à un mode de sonnerie des éléments principaux du mécanisme de sonnerie muni du dispositif de blocage du marteau selon l'invention.
The purposes, advantages and characteristics of the striking mechanism of a watch will appear better in the following description especially with regard to the drawings in which:
  • the figure 1 represents in a simplified manner a three-dimensional view of certain parts of the striking mechanism provided with the hammer blocking device according to the invention, and
  • the Figures 2a to 2c represent enlarged plan views of different positions from a rest mode to a ring mode of the main elements of the striking mechanism provided with the hammer blocking device according to the invention.

Dans la description suivante, toutes les parties du mécanisme de sonnerie d'une montre, qui sont bien connues dans ce domaine technique, ne seront décrites que sommairement. L'accent est principalement mis sur le fonctionnement du dispositif de blocage du marteau dans le mode de repos et dans le mode de sonnerie pour éviter tout rebond du marteau contre le timbre suite à une première frappe.In the following description, all parts of the striking mechanism of a watch, which are well known in this technical field, will be described only briefly. The main focus is on the operation of the hammer lock device in the rest mode and in the ring mode to prevent the hammer from bouncing against the stamp after a first strike.

A la figure 1, il est représenté de manière simplifiée un mécanisme de sonnerie 1 d'une montre. Les diverses parties du mécanisme de sonnerie 1 sont montées normalement sur une platine ou un pont non représentés pour ne pas surcharger la figure 1. La platine se situe normalement au-dessus des différents éléments représentés du mécanisme de sonnerie, alors qu'une partie du pont se situe au-dessous des éléments représentés, en étant fixé également sur la platine.To the figure 1 , it is represented in a simplified manner a striking mechanism 1 of a watch. The various parts of the striking mechanism 1 are mounted normally on a deck or bridge not shown to avoid overloading the figure 1 . The plate is normally above the various elements represented by the striking mechanism, while part of the bridge is below the elements shown, being also fixed on the plate.

Le mécanisme de sonnerie 1 comprend au moins un timbre 2, qui est fixé à une de ses extrémités à un porte-timbre 3. Ce porte-timbre peut en principe être solidaire de la platine de montre non représentée, mais peut également être solidaire d'une partie intérieure du boîtier. L'autre extrémité du timbre 2, non représentée, est généralement libre de mouvement. Le timbre 2 peut être réalisé sous la forme d'au moins une portion de cercle ou de rectangle autour du mouvement de montre. Le timbre peut être par exemple un fil métallique de section transversale circulaire ou rectangulaire, qui est généralement en acier ou en métal précieux ou en verre métallique ou dans un autre matériau.The striking mechanism 1 comprises at least one stamp 2, which is fixed at one of its ends to a stamp holder 3. This stamp holder can in principle be integral with the watch plate not shown, but can also be secured to an inner part of the housing. The other end of the stamp 2, not shown, is generally free movement. The patch 2 may be in the form of at least a portion of a circle or rectangle around the watch movement. The stamp may be for example a wire of circular or rectangular cross section, which is usually steel or precious metal or metal glass or other material.

Le mécanisme de sonnerie 1 comprend encore au moins un marteau 4 monté rotatif autour d'un axe 14 entre une platine et un pont non représentés. Ce marteau est monté de préférence à proximité du porte-timbre 3. Le mécanisme de sonnerie 1 comprend également un contre-ressort amortisseur 5 et un ressort d'entraînement 6 du marteau. Le contre-ressort amortisseur 5 permet de maintenir le marteau 4 à distance du timbre 2 dans un mode de repos et de le repousser vers sa position de repos dans un mode de sonnerie. Le contre-ressort amortisseur 5 et le ressort d'entraînement 6 sont sous forme de lame élastique. Une extrémité 25 du contre-ressort 5 et une extrémité 26 du ressort d'entraînement 6 sont fixées sur le pont ou la platine non représentés. Une extrémité libre du contre-ressort 5 maintient le marteau 4 à distance du timbre 2 par l'intermédiaire d'une tige 9 fixée à travers une partie du marteau entre l'axe de rotation 14 et la portion d'impact du marteau.The striking mechanism 1 further comprises at least one hammer 4 rotatably mounted about an axis 14 between a plate and a bridge not shown. This hammer is preferably mounted near the stamp holder 3. The striking mechanism 1 also comprises a damping counter-spring 5 and a driving spring 6 of the hammer. The damper counter-spring 5 makes it possible to keep the hammer 4 at a distance from the stamp 2 in a rest mode and to push it back to its rest position in a ringing mode. The damper counter-spring 5 and the drive spring 6 are in the form of an elastic blade. One end 25 of the counter spring 5 and one end 26 of the drive spring 6 are fixed on the deck or the deck not shown. A free end of the counter-spring 5 maintains the hammer 4 away from the stamp 2 by means of a rod 9 fixed through a portion of the hammer between the axis of rotation 14 and the impact portion of the hammer.

Le ressort d'entraînement 6 peut être armé pour entraîner le marteau dans un mode de sonnerie en direction du timbre 2 pour produire un son acoustique. Le ressort d'entraînement 6 est préarmé par l'intermédiaire d'une levée 12, qui est montée rotative sur l'axe de rotation 14 du marteau 4. Cette levée 12 présente une dent visible sur la figure 1, qui est normalement activée par une roue à dents, non représentée, montée rotative sur la platine ou le pont. Lorsque la levée 12 est entraînée en rotation par une dent de la roue à dents, la levée 12 entraîne la tige 9 du marteau 4 pour le faire tourner autour de son axe de rotation 14 dans une direction anti-horaire selon la figure 1.The drive spring 6 may be cocked to drive the hammer in a bell mode toward the tone 2 to produce an acoustic sound. The drive spring 6 is pre-armed by means of a lift 12, which is rotatably mounted on the axis of rotation 14 of the hammer 4. This lift 12 has a visible tooth on the figure 1 which is normally activated by a toothed wheel, not shown, rotatably mounted on the plate or the bridge. When the lift 12 is rotated by a tooth of the toothed wheel, the lift 12 drives the rod 9 of the hammer 4 to rotate it about its axis of rotation 14 in a counterclockwise direction according to the figure 1 .

Le marteau 4 comprend encore une goupille 10, qui est fixée dans une ouverture du marteau dans une partie d'extrémité opposée à la portion d'impact par rapport à l'axe de rotation 14. Cette goupille 10 est de préférence disposée parallèlement à l'axe de rotation 14 et ne s'étend principalement que d'un côté inférieur du marteau. Lorsque le marteau 4 tourne dans la direction anti-horaire par l'action de la levée 12, la goupille 10 pousse l'extrémité libre du ressort d'entraînement 6 vers sa position préarmée au début d'un mode de sonnerie. Un ressort de levée 11, qui est sous forme d'une lame élastique et fixé à une extrémité 21 au pont ou à la platine, est également prévu pour pousser par son extrémité libre, la levée 12 pour la maintenir en contact de la tige 9.The hammer 4 further comprises a pin 10, which is fixed in a hammer opening in an end portion opposite to the impact portion relative to the axis of rotation 14. This pin 10 is preferably arranged parallel to the rotation axis 14 and does not extend mainly that of a lower side of the hammer. When the hammer 4 rotates in the anti-clockwise direction by the action of the lift 12, the pin 10 pushes the free end of the drive spring 6 to its prearranged position at the beginning of a ring mode. A lifting spring 11, which is in the form of an elastic blade and fixed at one end 21 to the bridge or to the plate, is also provided for pushing by its free end, the lift 12 to keep it in contact with the rod 9 .

Le mécanisme de sonnerie comprend encore selon l'invention un dispositif de blocage du marteau. Ce dispositif de blocage, qui sera expliqué plus en détail ci-après notamment en référence aux figures 2a à 2c, comprend essentiellement un verrou 8. Ce verrou 8 est monté rotatif selon un axe de rotation 18 entre le pont et la platine, qui peut être parallèle à l'axe de rotation 14 du marteau 4. Ce verrou 8 comprend un premier bras 8a, qui peut être de forme arquée. Ce premier bras 8a est muni à son extrémité libre d'un élément d'accrochage sous forme de crochet 28. Ce crochet est destiné à venir s'accrocher sur ou s'appuyer contre un moyen d'accrochage, qui est un cran 15 réalisé sur une surface latérale en périphérie de la partie d'extrémité du marteau 4 opposée à la portion d'impact. Quand le crochet 28 est en contact de la périphérie du marteau, il vient en appui contre ou s'accroche sur le cran 15 du marteau pour le bloquer. Cela empêche la portion d'impact du marteau de tourner dans le sens des aiguilles d'une montre en direction du timbre dans le mode de sonnerie suite à une première frappe. Le cran 15 peut être un plat disposé selon un angle droit ou un angle aigu depuis la surface latérale du marteau pour assurer un blocage du marteau au moyen du crochet 28 du premier bras 8a.The striking mechanism further comprises according to the invention a device for locking the hammer. This blocking device, which will be explained in more detail below, in particular with reference to Figures 2a to 2c essentially comprises a latch 8. This latch 8 is rotatably mounted on an axis of rotation 18 between the bridge and the plate, which may be parallel to the axis of rotation 14 of the hammer 4. This latch 8 comprises a first arm 8a, which can be arched. This first arm 8a is provided at its free end with a fastening element in the form of a hook 28. This hook is intended to catch on or lean against a hooking means, which is a notch 15 made on a lateral surface at the periphery of the end portion of the hammer 4 opposite to the impact portion. When the hook 28 is in contact with the periphery of the hammer, it bears against or clings to the notch 15 of the hammer to block it. This prevents the impact portion of the hammer from turning clockwise toward the stamp in the ring mode following a first strike. The notch 15 may be a flat disposed at a right angle or an acute angle from the lateral surface of the hammer to ensure a locking of the hammer by means of the hook 28 of the first arm 8a.

Le verrou 8 comprend encore un second bras 8b, qui peut être disposé parallèle au premier bras 8a et également être d'une même forme arquée. L'extrémité libre de ce second bras 8b comprend une portion sous forme de rampe contre laquelle vient s'appuyer une lame ressort complémentaire 6' du ressort d'entraînement 6. Cette lame ressort 6' vient de matière avec la lame principale du ressort d'entraînement 6, qui est réalisé en acier à ressort. De préférence, cette lame ressort complémentaire 6' du dispositif de blocage est parallèle à la lame principale du ressort d'entraînement 6 avec l'extrémité libre de la lame ressort complémentaire légèrement en retrait de l'extrémité libre de la lame principale du ressort d'entraînement. Lorsque la lame ressort 6' est en appui contre la rampe du second bras, cela permet de pousser le verrou 8 pour que le premier bras 8a vienne en appui contre la périphérie du marteau pour le bloquer. Par contre, quand le ressort d'entraînement 6 est préarmé, la lame ressort 6' n'est plus en appui contre la rampe du second bras 8b.The latch 8 further comprises a second arm 8b, which can be arranged parallel to the first arm 8a and also be of the same arcuate shape. The free end of this second arm 8b comprises a portion in the form of a ramp against which comes to rest a complementary leaf spring 6 'of the drive spring 6. This spring blade 6' comes of material with the main blade of the drive spring 6, which is made of spring steel. Preferably, this complementary spring blade 6 'of the locking device is parallel to the main blade of the drive spring 6 with the free end of the complementary spring blade slightly set back from the free end of the main blade of the spring of 'training. When the spring blade 6 'bears against the ramp of the second arm, it allows to push the latch 8 so that the first arm 8a bears against the periphery of the hammer to block it. On the other hand, when the drive spring 6 is pre-armed, the spring blade 6 'no longer bears against the ramp of the second arm 8b.

Le dispositif de blocage comprend encore un ressort de verrou 7 sous forme de bascule, qui est monté rotatif autour d'un axe de rotation 17 sur le pont en étant par exemple parallèle à l'axe de rotation 14 du marteau 4. Le ressort de verrou 7 comprend une lame élastique, dont une première extrémité libre vient en appui sur une partie du ressort d'entraînement 6 pour être en mesure de générer une force de rappel dans le sens des aiguilles d'une montre. Le ressort de verrou 7 comprend encore une portion d'une seconde extrémité à proximité de l'axe de rotation 17. La bordure de cette portion d'extrémité du ressort de verrou 7 a pour fonction de pousser le second bras 8b à distance de la périphérie du marteau, quand la lame ressort complémentaire 6' n'est plus en contact de la rampe du second bras 8b. Cette portion d'extrémité pousse le second bras 8b par la force générée par la flexion de la lame en appui contre le ressort d'entraînement 6. Avec cela, le crochet 28 du premier bras 8a est également éloigné de la périphérie du marteau 4 pour ne plus bloquer ledit marteau.The locking device also comprises a latch spring 7 in the form of a latch, which is rotatably mounted about an axis of rotation 17 on the bridge, for example being parallel to the axis of rotation 14 of the hammer 4. The spring of latch 7 comprises an elastic blade, a first free end bears on a portion of the drive spring 6 to be able to generate a return force in the direction of clockwise. The latch spring 7 further comprises a portion of a second end near the axis of rotation 17. The border of this end portion of the latch spring 7 has the function of pushing the second arm 8b away from the periphery of the hammer, when the complementary leaf spring 6 'is no longer in contact with the ramp of the second arm 8b. This end portion pushes the second arm 8b by the force generated by the flexion of the blade bearing against the drive spring 6. With this, the hook 28 of the first arm 8a is also moved away from the periphery of the hammer 4 to no longer block said hammer.

La portion d'extrémité du ressort de verrou 7 comprend encore une gorge en forme d'arc de cercle pour recevoir la goupille 10 du marteau 4, lorsque le marteau frappe une première fois le timbre. Avant la frappe du marteau contre le timbre 2, la portion d'extrémité du ressort de verrou 7 maintient le second bras 8b, ainsi que le premier bras 8a à distance de la périphérie du marteau 4. Dans le mode de sonnerie, quand le ressort d'entraînement 6 entraîne le marteau 4 en direction du timbre 2, le crochet 28 du premier bras 8a ne peut encore s'accrocher sur le cran 15 du marteau, car la portion d'extrémité du ressort de verrou 7 maintient toujours le second bras 8b à distance. La lame ressort complémentaire 6' vient en contact de la rampe du second bras lors de l'entraînement du marteau, mais sans avoir une force suffisante pour permettre directement de pousser le second bras 8b en direction de la périphérie du marteau pour un blocage du marteau. Cette force est également dépendante de l'inclinaison de la rampe, qui peut être adaptée.The end portion of the latch spring 7 further comprises an arcuate groove to receive the pin 10 of the hammer 4, when the hammer strikes the first time the stamp. Before the striking of the hammer against the stamp 2, the end portion of the lock spring 7 maintains the second arm 8b, as well as the first arm 8a away from the periphery of the hammer 4. In the ring mode, when the drive spring 6 drives the hammer 4 towards the stamp 2, the hook 28 of the first arm 8a can not yet catch on the notch 15 of the hammer, because the end portion of the latch spring 7 always keeps the second arm 8b at a distance. The complementary spring blade 6 'comes into contact with the ramp of the second arm during the driving of the hammer, but without having sufficient force to allow the second arm 8b to be pushed directly towards the periphery of the hammer for a locking of the hammer. . This force is also dependent on the inclination of the ramp, which can be adapted.

Une fois que le marteau vient frapper une première fois le timbre 2, la goupille 10 du marteau vient dans la gorge circulaire de la portion d'extrémité du ressort de verrou 7. Avec le mouvement de la goupille 10 dans ladite gorge, la portion d'extrémité du ressort de verrou 7 est forcée de légèrement tourner dans une direction anti-horaire selon la figure 1. Une flexion de la première extrémité de la lame élastique du ressort de verrou 7 en contact du ressort d'entraînement 6, intervient. Cela a pour effet de permettre à la lame ressort complémentaire 6' en contact de la rampe du second bras 8b de pousser le second bras 8b, ainsi que le premier bras 8a en direction de la périphérie du marteau 4. Le crochet 28 du premier bras 8a vient ainsi s'appuyer contre le cran 15 du marteau suite à la première frappe contre le timbre, lorsque le marteau est repoussé par le contre-ressort 5 en position de repos. Dès le retour vers la position de repos du marteau 4, la portion d'extrémité n'a plus suffisamment de force pour repousser le second bras 8b à distance du marteau, étant donné le contact de l'extrémité de la lame ressort complémentaire 6' sur la rampe. Le marteau est ainsi bloqué directement à la suite d'une seule frappe contre le timbre sans rebond subséquent, ce qui est recherché par l'invention.Once the hammer first hits the stamp 2, the pin 10 of the hammer comes into the circular groove of the end portion of the lock spring 7. With the movement of the pin 10 in said groove, the portion of the hammer 10 the end of the latch spring 7 is forced to slightly rotate in a counterclockwise direction according to the figure 1 . A flexion of the first end of the resilient blade of the latch spring 7 in contact with the drive spring 6, occurs. This has the effect of allowing the complementary spring blade 6 'in contact with the ramp of the second arm 8b to push the second arm 8b, as well as the first arm 8a towards the periphery of the hammer 4. The hook 28 of the first arm 8a thus bears against the notch 15 of the hammer after the first knock against the stamp, when the hammer is pushed by the counter spring 5 in the rest position. Upon returning to the rest position of the hammer 4, the end portion has no more force to push the second arm 8b away from the hammer, given the contact of the end of the complementary leaf spring 6 ' on the ramp. The hammer is thus locked directly following a single strike against the stamp without subsequent rebound, which is sought by the invention.

Grâce au dispositif de blocage du marteau, la force de réaction du contre-ressort 5 n'a plus besoin d'être importante pour ramener le marteau en position de repos suite à la frappe du timbre. A titre comparatif, il suffit d'une force de l'ordre de 0.1 N du contre-ressort 5 pour ramener le marteau en position de repos selon l'invention avec le dispositif de blocage susmentionné. Pour un mécanisme de sonnerie traditionnel, le contre-ressort doit en principe repousser le marteau avec une force de l'ordre de 3 N pour éviter tout rebond. Le ressort d'entraînement préarmé génère normalement une force de l'ordre de 1 N pour pousser le marteau en direction du timbre.With the hammer lock device, the reaction force of the counter spring 5 no longer needs to be important to bring the hammer back in the rest position following the stamp strike. By way of comparison, a force of the order of 0.1 N of the counter spring 5 is sufficient to bring the hammer back to the rest position according to the invention with the above-mentioned blocking device. For a traditional striking mechanism, the counter spring should in principle push the hammer with a force of about 3 N to avoid rebound. The prearranged drive spring normally generates a force of the order of 1 N to push the hammer toward the stamp.

Pour mieux comprendre le fonctionnement du dispositif de blocage du mécanisme de sonnerie selon l'invention, il est fait référence aux figures 2a à 2c. Ces figures 2a à 2c représentent des vues agrandies du mécanisme au niveau du dispositif de blocage, dont les éléments sont montrés depuis dessous par rapport à la figure 1. La figure 2a représente le mécanisme de sonnerie dans une position de repos avec le verrou 8 du dispositif de blocage, qui bloque le marteau 4. La figure 2b représente une position initiale du mode de sonnerie avec le ressort d'entraînement préarmé. Finalement la figure 2c représente l'instant de la première frappe du marteau 4 contre le timbre avec les premier et second bras 8a et 8b entraînés pour revenir en contact de la périphérie du marteau, mais avant le blocage du marteau.To better understand the operation of the locking device of the striking mechanism according to the invention, reference is made to Figures 2a to 2c . These Figures 2a to 2c represent enlarged views of the mechanism at the blocking device, the elements of which are shown from below relative to the figure 1 . The figure 2a represents the striking mechanism in a rest position with the latch 8 of the locking device, which blocks the hammer 4. The figure 2b represents an initial position of the ring mode with the preassembled training spring. Finally the Figure 2c represents the moment of the first striking of the hammer 4 against the stamp with the first and second arms 8a and 8b driven to come into contact with the periphery of the hammer, but before the blocking of the hammer.

A la figure 2a, le mécanisme de sonnerie est dans un mode de repos. Le verrou 8 du dispositif de blocage permet de maintenir bloqué le marteau 4. Pour se faire, le verrou, qui est monté rotatif autour d'un axe de rotation 18 de préférence perpendiculaire à la platine, comprend un premier bras 8a et un second bras 8b de forme générale équivalente et disposé parallèle au premier bras. Le premier bras 8a comprend à une extrémité un crochet 28, qui est à la figure 2a, en appui contre ou accroché sur un cran 15 du marteau 4. Le second bras 8b est poussé en direction de la périphérie du marteau par l'intermédiaire de la lame ressort complémentaire 6' en contact d'une rampe 30 du second bras. La lame ressort complémentaire 6' pousse le second bras à l'encontre d'une force de répulsion générée par un coin 26 de la portion d'extrémité du ressort de verrou 7, qui agit contre une arête 29 de l'extrémité du second bras 8b. Dans cette situation, le ressort de verrou 7 par l'intermédiaire de son coin 26 ne génère pas une force suffisante par rapport à la force de la lame du ressort complémentaire 6' pour pousser par l'intermédiaire de la rampe 30, le second bras 8b avec le premier bras 8a à distance de la périphérie du marteau 4. La force de frottement de la lame ressort complémentaire 6' sur la rampe 30, ainsi que l'inclinaison de la rampe, joue aussi un rôle pour maintenir cette position de blocage du marteau dans ce mode de repos.To the figure 2a , the striking mechanism is in a rest mode. The latch 8 of the locking device makes it possible to keep the hammer 4 locked. To do this, the latch, which is rotatably mounted about an axis of rotation 18, preferably perpendicular to the plate, comprises a first arm 8a and a second arm 8b of equivalent general shape and arranged parallel to the first arm. The first arm 8a comprises at one end a hook 28, which is at the figure 2a , against or hooked on a notch 15 of the hammer 4. The second arm 8b is pushed towards the periphery of the hammer by means of the complementary spring blade 6 'in contact with a ramp 30 of the second arm. The complementary leaf spring 6 'pushes the second arm against a force repulsion generated by a wedge 26 of the end portion of the latch spring 7, which acts against an edge 29 of the end of the second arm 8b. In this situation, the latch spring 7 via its wedge 26 does not generate a sufficient force with respect to the force of the leaf of the complementary spring 6 'to push through the ramp 30, the second arm 8b with the first arm 8a away from the periphery of the hammer 4. The friction force of the complementary leaf spring 6 'on the ramp 30, as well as the inclination of the ramp, also plays a role in maintaining this blocking position hammer in this mode of rest.

Dans le mode de repos du mécanisme de sonnerie, l'extrémité du contre-ressort 5 est en principe en contact de la tige 9 du marteau. La levée 12, qui est montée rotative autour de l'axe de rotation 14 du marteau 4, est poussée contre la tige 9 par le ressort de levée non représenté. L'extrémité libre du ressort d'entraînement 6 n'est pas en contact de la goupille 10, qui n'est également pas en contact dans une gorge circulaire 27 de la portion d'extrémité du ressort de verrou 7.In the rest mode of the striking mechanism, the end of the counter spring 5 is in principle in contact with the rod 9 of the hammer. The lift 12, which is rotatably mounted about the axis of rotation 14 of the hammer 4, is pushed against the rod 9 by the not shown lifting spring. The free end of the drive spring 6 is not in contact with the pin 10, which is also not in contact in a circular groove 27 of the end portion of the lock spring 7.

Pour passer de ce mode de repos du mécanisme de sonnerie à un mode de sonnerie, le mouvement des éléments du mécanisme est représenté par des flèches en traits interrompus. La levée 12 est entraînée en rotation dans le sens des aiguilles d'une montre par une roue à dents non représentée. La rotation de cette levée 12 a pour effet de déplacer la tige 9 et la goupille 10 dans le sens des aiguilles d'une montre par rapport à l'axe de rotation 14 du marteau 4. Une fois que la goupille 10 vient en contact de l'extrémité libre du ressort d'entraînement 6, cette goupille 10 pousse le ressort d'entraînement 6 dans une position préarmée comme montré par la suite à la figure 2b. Par le déplacement du ressort d'entraînement, la lame ressort complémentaire 6' n'est plus en contact de la rampe 30. Cela permet au coin 26 de la portion d'extrémité de pousser l'arête 29 du second bras 8b du verrou 8 à distance de la périphérie du marteau 4.To switch from this mode of rest of the striking mechanism to a ringing mode, the movement of the elements of the mechanism is represented by arrows in broken lines. The lift 12 is rotated in a clockwise direction by a not shown toothed wheel. The rotation of this lift 12 has the effect of moving the rod 9 and the pin 10 in the direction of clockwise relative to the axis of rotation 14 of the hammer 4. Once the pin 10 comes into contact with the free end of the drive spring 6, this pin 10 pushes the drive spring 6 in a prearranged position as shown later in the figure 2b . By the movement of the drive spring, the complementary leaf spring 6 'is no longer in contact with the ramp 30. This allows the corner 26 of the end portion to push the edge 29 of the second arm 8b of the lock 8 away from the periphery of the hammer 4.

La figure 2b représente justement la position initiale du mode de sonnerie avec le ressort d'entraînement 6 préarmé. Dans cette position, l'extrémité libre du contre-ressort 5 n'est plus en contact de la tige 9 étant donné la rotation de la levée 12 imposée par la roue à dents jusqu'à une position maximum. La goupille 10 maintient le ressort d'entraînement 6 dans un état préarmé. La lame ressort complémentaire 6' n'est plus en contact de la rampe 30 et le coin 26 a poussé l'arête 29 du second bras 8b vers l'extérieur de la périphérie du marteau 4. Dans cette condition, la force générée par la flexion de lame élastique du ressort de verrou 7 en appui sur le ressort d'entraînement 6 devient minimale.The figure 2b represents precisely the initial position of the ring mode with the drive spring 6 pre-cocked. In this position, the free end of the counter-spring 5 is no longer in contact with the rod 9 due to the rotation of the lift 12 imposed by the toothed wheel to a maximum position. The pin 10 holds the drive spring 6 in a pre-armed state. The complementary spring blade 6 'is no longer in contact with the ramp 30 and the wedge 26 has pushed the edge 29 of the second arm 8b towards the outside of the periphery of the hammer 4. In this condition, the force generated by the resilient blade bending of the latch spring 7 resting on the drive spring 6 becomes minimal.

A la figure 2c, il est représenté l'instant de la première frappe du marteau 4 contre le timbre avec les premier et second bras 8a et 8b entraînés pour revenir en contact de la périphérie du marteau, mais avant le blocage du marteau. En étant entraîné par le ressort d'entraînement 6 depuis sa position préarmée en direction du timbre, le marteau 4 vient frapper une première fois le timbre. Lors du contact de la portion d'impact du marteau contre le timbre, la goupille 10 du marteau 4 vient en contact dans la gorge circulaire 27 de la portion d'extrémité du ressort de verrou 7. Le contact de la goupille 10 dans la gorge 27 a pour effet de faire tourner le ressort de verrou 7 dans le sens des aiguilles d'une montre comme montré par la flèche en traits interrompus. Comme le marteau est suffisamment lourd, il impose une force importante dans la gorge 27 pour faire tourner la portion d'extrémité du ressort de verrou 7 à l'encontre de la force de flexion de sa lame élastique en appui sur le ressort d'entraînement 6.To the Figure 2c , it is represented the moment of the first striking of the hammer 4 against the stamp with the first and second arms 8a and 8b driven to come into contact with the periphery of the hammer, but before the hammer lock. By being driven by the drive spring 6 from its prearranged position in the direction of the stamp, the hammer 4 hits the first time the stamp. Upon contact of the impact portion of the hammer against the patch, the pin 10 of the hammer 4 comes into contact with the circular groove 27 of the end portion of the lock spring 7. The contact of the pin 10 in the throat 27 has the effect of rotating the latch spring 7 clockwise as shown by the dashed arrow. As the hammer is sufficiently heavy, it imposes a large force in the groove 27 to rotate the end portion of the latch spring 7 against the bending force of its resilient blade resting on the drive spring 6.

La lame ressort complémentaire 6' s'appuie sur la rampe 30 pour déplacer le verrou 8 en direction de la périphérie du marteau. Cependant comme le marteau vient de frapper le timbre pour une première fois, le crochet 28 du premier bras 8a n'a pas eu le temps de venir directement s'accrocher sur le cran 15 du marteau. Ce n'est qu'après la première frappe du marteau 4 contre le timbre, quand le contre-ressort 5 repousse le marteau vers sa position de repos, que le crochet 28 vient s'accrocher sur le cran 15 du marteau pour le maintenir bloqué, ce qui est recherché par l'invention.The complementary leaf spring 6 'rests on the ramp 30 to move the lock 8 towards the periphery of the hammer. However, as the hammer has just struck the stamp for the first time, the hook 28 of the first arm 8a has not had time to come directly to hook on the notch 15 of the hammer. It is only after the first striking of the hammer 4 against the stamp, when the counter spring 5 pushes the hammer towards its rest position, that the hook 28 hangs on the notch 15 of the hammer to keep it locked, which is sought by the invention.

Grâce au dispositif de blocage du mécanisme de sonnerie de la présente invention, tout rebond du marteau contre le timbre est ainsi évité. Il n'est donc pas nécessaire également de munir le mécanisme de sonnerie d'un contre-ressort repoussant avec une grande force le marteau vers sa position de repos. La force du contre-ressort peut être minimale, ce qui procure l'avantage qu'une perte minimale d'énergie cinétique du marteau est constatée, lors de sa frappe contre le timbre pour produire un son de niveau acoustique suffisant.Thanks to the locking mechanism of the striking mechanism of the present invention, any rebound of the hammer against the stamp is thus avoided. It is therefore not also necessary to provide the striking mechanism with a counter-spring pushing with great force the hammer to its rest position. The counter-spring force can be minimal, which provides the advantage that a minimal loss of kinetic energy of the hammer is noted, when struck against the timbre to produce a sufficient sound level sound.

A partir de la description qui vient d'être faite, plusieurs variantes du mécanisme de sonnerie d'une montre muni du dispositif de blocage peuvent être conçues par l'homme du métier sans sortir du cadre de l'invention définie par les revendications. La lame ressort complémentaire peut être fixée par vissage ou soudure à la lame principale du ressort d'entraînement après sa réalisation. Le ressort de verrou peut être disposé autour de l'axe de rotation du verrou. Le verrou peut ne comprendre qu'un seul bras avec à une extrémité au moins un crochet et des éléments d'appui de la lame ressort complémentaire et éventuellement du ressort de verrou. Le verrou peut être disposé dans une position de blocage ou une position de déblocage du marteau par un déplacement rectiligne. Le marteau peut être agencé pour se déplacer de manière rectiligne pour venir frapper le timbre. La tige et/ou la goupille du marteau peuvent être réalisées directement dans la matière du marteau en une pièce.From the description that has just been made, several variants of the striking mechanism of a watch provided with the locking device can be designed by the skilled person without departing from the scope of the invention defined by the claims. The complementary spring blade can be fixed by screwing or welding to the main blade of the drive spring after its completion. The lock spring can be arranged around the axis of rotation of the lock. The lock may comprise only one arm with at least one end with a hook and bearing elements of the complementary spring blade and possibly the latch spring. The lock can be arranged in a locking position or a release position of the hammer by a rectilinear movement. The hammer can be arranged to move rectilinearly to hit the stamp. The pin and / or pin of the hammer can be made directly into the material of the hammer in one piece.

Claims (15)

Mécanisme de sonnerie (1) d'une montre, le mécanisme comprenant : - un timbre (2), qui est relié à un porte-timbre (3), - un marteau (4) pour venir frapper le timbre (2) en des instants prédéterminés, - un contre-ressort amortisseur (5) pour maintenir le marteau à distance du timbre (2) dans un mode de repos, et - un ressort (6) d'entraînement du marteau, qui comprend une extrémité fixe et une extrémité libre de mouvement, ledit ressort étant susceptible d'être armé pour entraîner ledit marteau (4) contre le timbre (2) dans un mode de sonnerie pour produire un son acoustique,
caractérisé en ce que le mécanisme de sonnerie comprend un dispositif de blocage, muni d'au moins un verrou (8), qui est destiné à bloquer le marteau (4) dans un mode de repos, et à être écarté du marteau dans un mode de sonnerie, lorsque le ressort d'entraînement (6) est armé, le dispositif de blocage étant agencé pour que le ressort d'entraînement entraîne le marteau pour une première frappe contre le timbre avant que le verrou bloque le marteau en position de repos suite à la première frappe. Clock mechanism (1) of a watch, the mechanism comprising: - a stamp (2), which is connected to a stamp holder (3), a hammer (4) for striking the stamp (2) at predetermined times, a damping counter-spring (5) for keeping the hammer at a distance from the stamp (2) in a rest mode, and a spring (6) for driving the hammer, which comprises a fixed end and a free end of movement, said spring being capable of being cocked to drive said hammer (4) against the stamp (2) in a bell mode to produce an acoustic sound,
characterized in that the striking mechanism comprises a locking device, provided with at least one lock (8), which is intended to block the hammer (4) in a rest mode, and to be removed from the hammer in a mode when the driving spring (6) is armed, the locking device being arranged so that the driving spring drives the hammer for a first strike against the stamp before the lock blocks the hammer in the rest position. at the first strike. Mécanisme de sonnerie (1) selon la revendication 1, caractérisé en ce que le marteau est monté rotatif autour d'un axe de rotation (14) sur une platine de montre, et en ce qu'il comprend une portion d'impact susceptible de venir frapper le timbre (2) en des instants prédéterminés, et une partie d'extrémité avec un moyen d'accrochage (15) pour le dispositif de blocage.Ringing mechanism (1) according to claim 1, characterized in that the hammer is rotatably mounted about an axis of rotation (14) on a watch plate, and in that it comprises an impact portion capable of to strike the stamp (2) at predetermined times, and an end portion with a hooking means (15) for the locking device. Mécanisme de sonnerie (1) selon la revendication 2, caractérisé en ce que le moyen d'accrochage comprend un cran (15) réalisé sur une surface latérale en périphérie d'une partie d'extrémité du marteau.Ringing mechanism (1) according to claim 2, characterized in that the hooking means comprises a notch (15) made on a lateral surface at the periphery of an end portion of the hammer. Mécanisme de sonnerie (1) selon la revendication 3, caractérisé en ce que le cran (15) est disposé d'un côté de l'axe de rotation (14) opposé à la portion d'impact du marteau (4).Ringer mechanism (1) according to claim 3, characterized in that the notch (15) is disposed on one side of the axis of rotation (14) opposite to the impact portion of the hammer (4). Mécanisme de sonnerie (1) selon l'une des revendications précédentes, caractérisé en ce que le ressort d'entraînement (6) et le contre-ressort (5) sont configurés sous la forme de lame ressort, dont une extrémité est fixée sur une platine ou un pont de montre, alors qu'une autre extrémité est libre de mouvement.Bell mechanism (1) according to one of the preceding claims, characterized in that the drive spring (6) and the counter-spring (5) are configured as spring blades, one end of which is fixed on a platinum or a watch bridge, while another end is free of movement. Mécanisme de sonnerie (1) selon la revendication 5, caractérisé en ce que le marteau (4) comprend une tige (9) du côté d'une portion d'impact du marteau, qui est en contact de l'extrémité libre du contre-ressort (5) pour maintenir le marteau à distance du timbre dans un mode de repos ou pour repousser le marteau vers sa position de repos.Bell mechanism (1) according to claim 5, characterized in that the hammer (4) comprises a rod (9) on the side of an impact portion of the hammer, which is in contact with the free end of the counter- spring (5) to hold the hammer at a distance from the stamp in a rest mode or to push the hammer back to its rest position. Mécanisme de sonnerie (1) selon la revendication 5, caractérisé en ce que le marteau (4) comprend une goupille (10) disposée dans une partie d'extrémité du marteau d'un côté opposé à une portion d'impact du marteau par rapport à un axe de rotation (14) du marteau, et en ce qu'une extrémité libre du ressort d'entraînement (6) est destinée à entraîner la portion d'impact du marteau contre le timbre (2) par l'intermédiaire de la goupille (10), quand le ressort d'entraînement est préarmé dans un mode de sonnerie.Bell mechanism (1) according to claim 5, characterized in that the hammer (4) comprises a pin (10) disposed in an end portion of the hammer on a side opposite to a hammer impact portion relative to to an axis of rotation (14) of the hammer, and in that a free end of the drive spring (6) is intended to drive the impact portion of the hammer against the stamp (2) via the pin (10), when the drive spring is pre-armed in a ring mode. Mécanisme de sonnerie (1) selon l'une des revendications 1 à 3, caractérisé en ce que le verrou (8) du dispositif de blocage est monté rotatif autour d'un axe de rotation (18) sur une platine ou sur un pont de montre, et en ce que le verrou (8) comprend un premier bras (8a) à l'extrémité libre duquel est disposé un élément d'accrochage sous forme de crochet (28) pour bloquer le marteau.Bell mechanism (1) according to one of claims 1 to 3, characterized in that the latch (8) of the locking device is rotatably mounted about an axis of rotation (18) on a plate or a bridge of shows, and in that the latch (8) comprises a first arm (8a) at the free end of which is disposed a hooking member hook (28) for locking the hammer. Mécanisme de sonnerie (1) selon la revendication 8, caractérisé en ce que le crochet (28) du verrou est destiné à venir s'accrocher sur un cran (15) d'une partie d'extrémité du marteau.Ringing mechanism (1) according to claim 8, characterized in that the hook (28) of the lock is intended to be hooked on a notch (15) of an end portion of the hammer. Mécanisme de sonnerie (1) selon la revendication 8, caractérisé en ce que le verrou comprend un second bras (8b) à l'extrémité libre duquel vient s'appuyer une lame ressort complémentaire (6') fixée sur le ressort d'entraînement (6), la lame ressort complémentaire (6') étant destinée à pousser le second bras en direction de la périphérie de la partie d'extrémité du marteau, pour que le crochet (28) s'accroche sur le cran (15) du marteau dans un mode de repos ou suite à une première frappe du marteau contre le timbre dans un mode de sonnerie.Ringing mechanism (1) according to claim 8, characterized in that the lock comprises a second arm (8b) at the free end of which is supported a complementary spring leaf (6 ') fixed on the drive spring ( 6), the complementary leaf spring (6 ') being intended to push the second arm towards the periphery of the end portion of the hammer, so that the hook (28) is hooked on the notch (15) of the hammer in a rest mode or following a first strike of the hammer against the stamp in a ring mode. Mécanisme de sonnerie (1) selon la revendication 10, caractérisé en ce que la lame ressort complémentaire (6') vient de matière avec le ressort d'entraînement (6) en étant disposée sensiblement parallèlement à la lame du ressort d'entraînement et dirigée en direction de l'extrémité libre du ressort d'entraînement.Ringing mechanism (1) according to claim 10, characterized in that the complementary leaf spring (6 ') is made of material with the drive spring (6) being arranged substantially parallel to the leaf of the drive spring and directed towards the free end of the drive spring. Mécanisme de sonnerie (1) selon la revendication 11, caractérisé en ce que l'extrémité libre de la lame ressort complémentaire (6') est destinée à venir en appui sur une rampe (30) de l'extrémité libre du second bras (8b).Ringing mechanism (1) according to claim 11, characterized in that the free end of the complementary leaf spring (6 ') is intended to bear on a ramp (30) of the free end of the second arm (8b ). Mécanisme de sonnerie (1) selon la revendication 10, caractérisé en ce que le second bras (8b) du verrou (8) est poussé vers une position à distance de la périphérie du marteau par un coin (26) d'une portion d'extrémité d'un ressort de verrou (7) en contact de l'extrémité libre du second bras (8b), quand la lame ressort complémentaire (6') n'est plus en contact de l'extrémité libre du second bras (8b) dans un mode de sonnerie.Ringing mechanism (1) according to claim 10, characterized in that the second arm (8b) of the lock (8) is pushed towards a position remote from the periphery of the hammer by a wedge (26) of a portion of end of a latch spring (7) in contact with the free end of the second arm (8b), when the complementary spring blade (6 ') is no longer in contact with the free end of the second arm (8b) in a ring mode. Mécanisme de sonnerie (1) selon la revendication 13, caractérisé en ce que le ressort de verrou (7) est monté rotatif autour d'un axe de rotation (17) en étant sous la forme de lame ressort avec une première extrémité libre du ressort de verrou en contact d'une partie du ressort d'entraînement (6) afin de pouvoir fléchir et fournir une force de répulsion au coin (26) de la portion à la seconde extrémité du ressort de verrou pour pousser le second bras (8b) à distance de la périphérie du marteau.Bell mechanism (1) according to claim 13, characterized in that the latch spring (7) is rotatably mounted about an axis of rotation (17) in the form of a spring blade with a first free end of the latch spring in contact with a portion of the drive spring (6) so as to be able to flex and provide a repulsive force at the corner (26) of the portion at the second end of the latch spring to push the second arm (8b) away from the periphery of the hammer. Mécanisme de sonnerie (1) selon la revendication 13, caractérisé en ce que la portion d'extrémité du ressort de verrou (7) comprend une gorge de forme circulaire (27) pour recevoir une goupille (10) du marteau dans un mode de sonnerie suite à une première frappe du marteau contre le timbre, afin de déplacer le coin (26) de la portion d'extrémité et permettre à la lame ressort complémentaire (6') de pousser le second bras (8b) en direction de la périphérie du marteau (4) pour bloquer le marteau suite à la première frappe du marteau contre le timbre.Bell mechanism (1) according to claim 13, characterized in that the end portion of the latch spring (7) comprises a circular groove (27) for receiving a pin (10) of the hammer in a bell mode. following a first strike of the hammer against the patch, to move the wedge (26) of the end portion and allow the complementary spring blade (6 ') to push the second arm (8b) towards the periphery of the hammer (4) to block the hammer after the first hammer strike against the stamp.
EP11193259.6A 2011-01-28 2011-12-13 Striking mechanism of a watch with blocking of the hammer Active EP2485097B1 (en)

Applications Claiming Priority (1)

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CH00142/11A CH704392A1 (en) 2011-01-28 2011-01-28 striking mechanism of a hammer lock watch.

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EP (1) EP2485097B1 (en)
JP (1) JP5416233B2 (en)
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EP2485097A3 (en) 2016-07-27
EP2485097B1 (en) 2019-01-02
US8514670B2 (en) 2013-08-20
CN102621871B (en) 2014-09-17
CH704392A1 (en) 2012-07-31
US20120195174A1 (en) 2012-08-02
JP2012159504A (en) 2012-08-23
JP5416233B2 (en) 2014-02-12
HK1174695A1 (en) 2013-06-14
CN102621871A (en) 2012-08-01

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