EP2485098A1 - Timepiece - Google Patents

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Publication number
EP2485098A1
EP2485098A1 EP12405015A EP12405015A EP2485098A1 EP 2485098 A1 EP2485098 A1 EP 2485098A1 EP 12405015 A EP12405015 A EP 12405015A EP 12405015 A EP12405015 A EP 12405015A EP 2485098 A1 EP2485098 A1 EP 2485098A1
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EP
European Patent Office
Prior art keywords
hammer
striking
anchor
limiting spring
timepiece
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
EP12405015A
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German (de)
French (fr)
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EP2485098B1 (en
Inventor
Christian Chatelain
Grégory Schmidt
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 Tudor SA
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Montres Tudor SA
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Priority to EP12405015.4A priority Critical patent/EP2485098B1/en
Publication of EP2485098A1 publication Critical patent/EP2485098A1/en
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Publication of EP2485098B1 publication Critical patent/EP2485098B1/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
    • 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
    • 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

Definitions

  • the present invention relates to a timepiece comprising a frame carrying a striking mechanism which comprises a motor member in kinematic connection with a striking wheel, a ring member pivotally mounted on the frame and comprising an anchor integral with a hammer ring, this anchor having two lifts alternately engaged with said ringing wheel to oscillate said striking hammer between a first striking position of a resonant member and a second position defined by a limiting member.
  • the oscillation frequency of the striking hammer must be low enough so that the sound can diffuse when the tone of the ringtone resonates, but also to maximize the duration of the ringing.
  • a conventional striking mechanism consists of a barrel engaging a pinion integral with a ring gear designed to drive the striking hammer.
  • This hammer is secured to an anchor whose two spouts or lifts slip alternately on the inclined flanks of the teeth of the ringing wheel when it is rotated by the barrel, so that the hammer oscillates between a position where the one it hits the resonant body of the ring and a second position defined by a stop.
  • the oscillation frequency of the hammer depends on the torque of the mainspring, the inertia of the hammer, and the assembly tolerances of the different components. The slightest variation of one of these parameters influences the hammer strike rate and thus the sound quality and the duration of the ring.
  • the dimensional tolerances, as well as the assembly tolerances do not make it possible to obtain a repeatable typing rate, and no means allow it to be adjusted.
  • the mass of the hammer is chosen so that, in a given space, its inertia is the greatest possible. This has the advantage, for a given engine torque, to obtain a low frequency of typing that allows a better diffusion of the sound of the tone of the ring.
  • the hammer strike rate, and therefore the duration of the ring and the quality of the sound are all the more sensitive to the effect of gravity, and therefore to the orientation of the wristwatch .
  • this design induces, during the hammer pulse to the limit stop, two distinct impacts of the striking itself.
  • the first shock comes from the impact of the hammer against this stop and the second shock is caused by the contact between the anchor and one of the teeth of the ringing wheel, which has the effect of producing a jerky ringtone accompanied by a parasitic noise.
  • One solution would be to remove the limit stop so that the hammer abuts against one of the teeth of the ringing wheel, but this design does not eliminate unwanted noise and may result in premature wear of the striking mechanism. .
  • the CH 700 606 describes another striking device in which the pivot axis of the hammer passes through its center of gravity so as to make the mechanism less dependent on the orientation of the watch. This striking mechanism, however, does not allow to adjust the strike frequency of the hammer, or reduce the parasitic noise of the mechanism and the premature wear of the striking mechanism.
  • the Vulcain V10-H2 Golden Voice movement includes an O-ring on the stop which acts as damping element.
  • O-ring on the stop which acts as damping element.
  • the latter does not adjust the strike rate of the hammer ring.
  • the object of the present invention is to remedy, at least in part, the aforementioned drawbacks.
  • the invention relates to a timepiece according to claim 1.
  • the hammer is fixed on the anchor, or vice versa, so as to form a single piece, the construction of the timepiece is simplified and the tolerance chain, shorter, allows obtain a more limited dispersion of the strike frequency of the striking hammer.
  • the hammer and the anchor can be made in one piece.
  • the elastic nature of the limiting spring makes it possible to restore a large part of the energy absorbed during the elastic deformation of the spring by the hammer, and thus acts on the hammer strike rate.
  • the limiting spring according to the invention is prestressed, which makes it possible to adjust the striking rate of the hammer.
  • the limiting spring also serves as a damper, which has two advantages.
  • the shock between one of the teeth of the ringing wheel and the anchor is attenuated, which reduces the noise and reduces the wear of the mechanism.
  • shock absorption is proportional to the energy stored by the hammer. The more the shock is violent, the more it is amortized.
  • the rebound effects of the anchor on the ringing wheel are attenuated, regardless of the orientation of the hammer in the gravitational field. This therefore has the effect of limiting the effect of the position of the watch on the striking dynamics of the hammer, and therefore on the duration of the ring and the sound quality.
  • the figure 1 represents a striking mechanism mounted on a plate 1 forming the frame of the timepiece or the additional module of the timepiece.
  • This mechanism comprises a striking barrel 10 having a drum surrounded by a toothing 11.
  • a motor spring 12 is housed inside the drum.
  • the toothing 11 is engaged with a pinion 15 integral with a ringing wheel 20.
  • the teeth 21 of this wheel can alternately drive an anchor 30 mounted oscillating about a pivot axis 33.
  • This anchor 30 is integral with 'a hammer striking 40, which together form a ringing organ.
  • the anchor is used to oscillate the striking hammer so that it periodically hits a resonant member 50, in this case a ring tone.
  • this anchor comprises two spouts or lifts 31, 32, against which the teeth 21 of the ringing wheel 20 slide alternately when it is rotated by the motor member 10, thereby oscillating the anchor 30 and therefore the striking hammer 40.
  • anchor 30 and the hammer 40 form a single member reduces the number of assembled elements which is composed of the striking mechanism. This ringing member joining the anchor 30 and the hammer 40 reduces the chain of tolerances, but however does not significantly minimize the dispersion of the striking frequency of the hammer on the stamp.
  • the figures 1 and 2 illustrate the two limit positions of the hammer 40 during its movement oscillating about the axis 33.
  • the hammer 40 occupies a first position in which a portion 41 of the hammer hits the stamp 50 to make it vibrate.
  • the second position of the hammer 40 illustrated by the figure 2 is where a heel 42 of the hammer comes into contact with a limitation spring 60.
  • the limiting spring 60 is prestressed against a bearing surface 69, preferably adjustable.
  • the limiting spring is advantageously constituted by a leaf spring which is fixed to the frame 1 by one of its ends, for example by embedding thereof with the aid of a fixing member 65 and whose free end 61 constitutes the part serving to limit the stroke of the hammer 40 in an elastic manner.
  • the heel 42 of the hammer 40 is intended to come into contact with the spring 60, between the free end 61 of the blade spring and the place where the blade bears against the bearing surface 69.
  • the length of the leaf of the limitation spring 60 is of the order of 12 mm and its section is of the order of 0.65 x 0.1 mm.
  • the distance between the fastener 65 and the bearing surface 69 is about 9 mm.
  • the bearing surface 69 is constituted by the lateral face of a prestressing member 70, for example in the form of a control eccentric 71 whose upper face has a diametrical gripping slot 72 to allow its angular position and thus the prestressing of the leaf of the limitation spring 60, using a screwdriver.
  • the eccentric 71 has been rotated in the position in which the part of its lateral surface farthest from the axis of rotation is in contact with the leaf of the limiting spring 60.
  • the arrow of the latter is then maximal, typically of the order of 0.7 mm, in this case equal to 0.67 mm.
  • the eccentric 71 is adjusted in an intermediate position, so that the deflection of the leaf of the limiting spring 60 is typically of the order of 0.3 mm, in this case equal to 0.33 mm.
  • the energy restored by the limiting spring 60 is added to the pulse transmitted to the anchor by the ringing wheel to move the hammer against the stamp.
  • the restored energy accelerates the hammer during its movement towards the resonant organ and thus influences the rate of striking. This reciprocating movement of the hammer occurs as long as the ringing is not stopped or until the mainspring is disarmed.
  • Table 1 gives the duration in seconds of the ring according to the two variable parameters mentioned above.
  • the first parameter corresponds to the prestressing value of the limiting spring 60 which, in this case, results in the three positions of the bearing surface 69 of the eccentric 71 to the Figures 3a, 3b and 3c , which can be compared with the behavior of a mechanism without limiting spring, but fixed stop.
  • the second parameter is that of the orientation of the timepiece in space in five different positions.
  • the second table gives the values of hammer strike frequency according to the same parameters as those described previously.
  • TABLE 2 Typing frequency [Hz] CH 3H 9H 12H 6H Average Dispersion (3 ⁇ Sigma) Setting 1 66.0 61.4 64.3 63.7 60.8 63.2 6.4 Setting 2 55.3 52.1 52.8 52.8 49.1 52.4 6.7 Setting 3 41.5 45.5 39.0 42.8 42.6 42.3 7.1 Without stop 40.0 46.0 37.8 41.2 43.2 41.6 9.4
  • the preloading of the limiting spring 60 has the effect of reducing the influence of gravity on the striking mechanism.
  • Table 1 shows that the dispersion of the ringing time is nearly five times higher when the limiting spring 60 is prestressed only when it is subjected to a maximum preload in accordance with the figure 3a .
  • an eccentric to adjust the position of the bearing surface 69 corresponds to the preferred embodiment of the invention
  • any other adjustment system for example screw, allowing a measured displacement and a Blocking a surface capable of defining an adjustable support position
  • the bearing surface 69 is located on the eccentric 71, this bearing surface could be on another piece distinct from the eccentric and kinematically connected to it.
  • the object of the present invention it becomes not only possible to adjust the duration of the ring by adjusting the striking frequency of the hammer through the adjusting means, but also to obtain a striking mechanism that is less sensitive to the orientation of the watch in space and not interfering with the sound emitted by the resonant organ.
  • the limiting spring reduces the risk of shearing the pivot axis of the anchor 33 and prevent premature wear of the striking mechanism.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Electromechanical Clocks (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Percussion Or Vibration Massage (AREA)

Abstract

The timepiece has a frame (1) carrying a striking mechanism. The mechanism comprises a motor element (10) kinematically linked with a striking wheel (20) and a striking hammer (40). The mechanism comprises an anchor (30) with pallets (31, 32) engaged alternately with the wheel and cooperating with the hammer to oscillate the hammer between a first striking position and a second striking position of a gong (50). A heel (42) of the hammer is in contact with a limiting spring (60), where the anchor and the hammer form a single striking element mounted to pivot on the frame.

Description

La présente invention se rapporte à une pièce d'horlogerie comportant un bâti portant un mécanisme de sonnerie qui comprend un organe moteur en liaison cinématique avec une roue de sonnerie, un organe de sonnerie monté pivotant sur le bâti et comprenant une ancre solidaire d'un marteau de sonnerie, cette ancre comportant deux levées en prise alternativement avec ladite roue de sonnerie pour faire osciller ledit marteau de sonnerie entre une première position de frappe d'un organe résonant et une seconde position définie par un organe de limitation.The present invention relates to a timepiece comprising a frame carrying a striking mechanism which comprises a motor member in kinematic connection with a striking wheel, a ring member pivotally mounted on the frame and comprising an anchor integral with a hammer ring, this anchor having two lifts alternately engaged with said ringing wheel to oscillate said striking hammer between a first striking position of a resonant member and a second position defined by a limiting member.

La fréquence d'oscillation du marteau de sonnerie doit être suffisamment faible pour que le son puisse se diffuser lorsque le timbre de la sonnerie entre en résonance, mais aussi pour maximiser la durée de la sonnerie.The oscillation frequency of the striking hammer must be low enough so that the sound can diffuse when the tone of the ringtone resonates, but also to maximize the duration of the ringing.

Un mécanisme de sonnerie conventionnel est constitué d'un barillet en prise avec un pignon solidaire d'une roue de sonnerie conçue pour entraîner le marteau de sonnerie. Ce marteau est solidaire d'une ancre dont les deux becs ou levées glissent alternativement sur les flancs inclinés des dents de la roue de sonnerie lorsque celle-ci est entraînée en rotation par le barillet, de sorte que le marteau oscille entre une position où celui-ci frappe l'organe résonnant de la sonnerie et une deuxième position définie par une butée.A conventional striking mechanism consists of a barrel engaging a pinion integral with a ring gear designed to drive the striking hammer. This hammer is secured to an anchor whose two spouts or lifts slip alternately on the inclined flanks of the teeth of the ringing wheel when it is rotated by the barrel, so that the hammer oscillates between a position where the one it hits the resonant body of the ring and a second position defined by a stop.

La fréquence d'oscillation du marteau dépend du couple du ressort moteur, de l'inertie du marteau, et des tolérances d'assemblage des différents composants. La moindre variation de l'un de ces paramètres influence la cadence de frappe du marteau et donc la qualité sonore et la durée de la sonnerie. Cependant, les tolérances dimensionnelles, ainsi que celles d'assemblage ne permettent pas d'obtenir une cadence de frappe répétable, et aucun moyen ne permet de l'ajuster.The oscillation frequency of the hammer depends on the torque of the mainspring, the inertia of the hammer, and the assembly tolerances of the different components. The slightest variation of one of these parameters influences the hammer strike rate and thus the sound quality and the duration of the ring. However, the dimensional tolerances, as well as the assembly tolerances, do not make it possible to obtain a repeatable typing rate, and no means allow it to be adjusted.

Par ailleurs, la masse du marteau est choisie de manière à ce que, dans un encombrement donné, son inertie soit la plus grande possible. Cela a pour avantage, pour un couple moteur donné, d'obtenir une faible fréquence de frappe qui permet une meilleure diffusion du son du timbre de la sonnerie. Toutefois dans ce cas, la cadence de frappe du marteau, et donc la durée de la sonnerie et la qualité du son, sont d'autant plus sensibles à l'effet de la gravité, et donc à l'orientation de la montre-bracelet.Moreover, the mass of the hammer is chosen so that, in a given space, its inertia is the greatest possible. This has the advantage, for a given engine torque, to obtain a low frequency of typing that allows a better diffusion of the sound of the tone of the ring. However, in this case, the hammer strike rate, and therefore the duration of the ring and the quality of the sound, are all the more sensitive to the effect of gravity, and therefore to the orientation of the wristwatch .

Enfin, cette conception induit, lors de l'impulsion du marteau vers la butée de limitation, deux chocs distincts de la frappe elle-même. Le premier choc provient de l'impact du marteau contre cette butée et le second choc est provoqué par le contact entre l'ancre et l'une des dents de la roue de sonnerie, ce qui a pour effet de produire une sonnerie saccadée accompagnée d'un bruit parasite. Une solution consisterait à supprimer la butée de limitation de manière à ce que le marteau vienne buter contre l'une des dents de la roue de sonnerie, mais cette conception ne supprime pas le bruit parasite et risque de produire une usure prématurée du mécanisme de sonnerie.Finally, this design induces, during the hammer pulse to the limit stop, two distinct impacts of the striking itself. The first shock comes from the impact of the hammer against this stop and the second shock is caused by the contact between the anchor and one of the teeth of the ringing wheel, which has the effect of producing a jerky ringtone accompanied by a parasitic noise. One solution would be to remove the limit stop so that the hammer abuts against one of the teeth of the ringing wheel, but this design does not eliminate unwanted noise and may result in premature wear of the striking mechanism. .

On a proposé, dans le CH 431 393 , un mécanisme de sonnerie qui permet d'obtenir soit une variation automatique de la cadence de frappe du marteau en cours de sonnerie, soit une sonnerie à cadence continue. Ce mécanisme n'a que deux positions et il ne permet donc pas un réglage précis de la fréquence de frappe du marteau de sonnerie. Il est par ailleurs compliqué et comporte un nombre de pièces élevé. De plus, comme l'ancre est dissociée du marteau, la chaîne de tolérances s'en trouve accrue, engendrant une plus grande dispersion de la fréquence de frappe du marteau de sonnerie.It has been proposed in CH 431 393 , a striking mechanism that allows to obtain either an automatic variation of the striking rate of the hammer during ringing, or a ringing at continuous rate. This mechanism has only two positions and therefore does not allow a precise adjustment of the strike frequency of the striking hammer. It is also complicated and has a high number of rooms. In addition, as the anchor is dissociated from the hammer, the chain of tolerances is increased, causing a greater dispersion of the strike frequency of the striking hammer.

Le CH 700 606 décrit un autre dispositif de sonnerie dans lequel l'axe de pivotement du marteau passe par son centre de gravité de façon à rendre le mécanisme moins dépendant de l'orientation de la montre. Ce mécanisme de sonnerie ne permet cependant pas d'ajuster la fréquence de frappe du marteau, ni de réduire le bruit parasite du mécanisme et l'usure prématurée du mécanisme de sonnerie.The CH 700 606 describes another striking device in which the pivot axis of the hammer passes through its center of gravity so as to make the mechanism less dependent on the orientation of the watch. This striking mechanism, however, does not allow to adjust the strike frequency of the hammer, or reduce the parasitic noise of the mechanism and the premature wear of the striking mechanism.

Pour atténuer le choc entre le marteau et la butée qui limite son déplacement, le mouvement Vulcain V10-H2 Golden Voice, comporte un joint O-ring sur la butée qui fait office d'élément amortisseur. Cependant, un tel joint n'annule pas le risque de voir apparaître des bruits parasites. D'autre part, ce dernier ne permet pas d'ajuster la cadence de frappe du marteau de sonnerie.To mitigate the shock between the hammer and the stop that limits its movement, the Vulcain V10-H2 Golden Voice movement, includes an O-ring on the stop which acts as damping element. However, such a seal does not eliminate the risk of seeing parasitic noises. On the other hand, the latter does not adjust the strike rate of the hammer ring.

Le but de la présente invention vise à remédier, au moins en partie, aux inconvénients précités.The object of the present invention is to remedy, at least in part, the aforementioned drawbacks.

A cet effet, l'invention a pour objet une pièce d'horlogerie selon la revendication 1.For this purpose, the invention relates to a timepiece according to claim 1.

Du fait que le marteau est fixé sur l'ancre, ou vice-versa, de façon à ne former qu'une seule pièce, la construction de la pièce d'horlogerie se trouve simplifiée et la chaîne de tolérance, plus courte, permet d'obtenir une dispersion plus limitée de la fréquence de frappe du marteau de sonnerie. Bien entendu, le marteau et l'ancre peuvent être fabriqués d'un seul tenant.Because the hammer is fixed on the anchor, or vice versa, so as to form a single piece, the construction of the timepiece is simplified and the tolerance chain, shorter, allows obtain a more limited dispersion of the strike frequency of the striking hammer. Of course, the hammer and the anchor can be made in one piece.

La nature élastique du ressort de limitation permet de restituer une grande partie de l'énergie absorbée lors de la déformation élastique du ressort par le marteau, et agit ainsi sur la cadence de frappe du marteauThe elastic nature of the limiting spring makes it possible to restore a large part of the energy absorbed during the elastic deformation of the spring by the hammer, and thus acts on the hammer strike rate.

De préférence le ressort de limitation selon l'invention est précontraint, ce qui permet d'ajuster la cadence de frappe du marteau. En outre, le ressort de limitation fait également office d'amortisseur, ce qui entraîne deux avantages. D'une part, le choc entre l'une des dents de la roue de sonnerie et l'ancre est atténué, ce qui diminue le bruit parasite et réduit l'usure du mécanisme. D'autre part, l'amortissement du choc est proportionnel à l'énergie emmagasinée par le marteau. Plus le choc est violent, plus celui-ci est amorti. Ainsi, les effets de rebond de l'ancre sur la roue de sonnerie sont atténués, quelle que soit l'orientation du marteau dans le champ de pesanteur. Cela a donc pour conséquence de limiter l'effet de la position de la montre sur la dynamique de frappe du marteau, et donc sur la durée de la sonnerie et sur la qualité du son.Preferably, the limiting spring according to the invention is prestressed, which makes it possible to adjust the striking rate of the hammer. In addition, the limiting spring also serves as a damper, which has two advantages. On the one hand, the shock between one of the teeth of the ringing wheel and the anchor is attenuated, which reduces the noise and reduces the wear of the mechanism. On the other hand, shock absorption is proportional to the energy stored by the hammer. The more the shock is violent, the more it is amortized. Thus, the rebound effects of the anchor on the ringing wheel are attenuated, regardless of the orientation of the hammer in the gravitational field. This therefore has the effect of limiting the effect of the position of the watch on the striking dynamics of the hammer, and therefore on the duration of the ring and the sound quality.

D'autres avantages et spécificités de l'invention apparaîtront à la lumière de la description détaillée qui suit et qui décrit une forme d'exécution préférée de l'invention, illustrée schématiquement et à titre d'exemple, par les figures annexées dans lesquelles:

  • La figure 1 est une vue en plan simplifiée des principaux organes du mécanisme de sonnerie d'une pièce d'horlogerie selon l'invention où le marteau de sonnerie est représenté dans sa première position.
  • La figure 2 est une vue similaire à celle de la figure 1 illustrant le marteau de sonnerie dans sa seconde position.
  • Les figures 3a, 3b et 3c sont des vues de détail dans trois positions de réglage différentes du ressort de limitation du marteau de sonnerie.
Other advantages and features of the invention will emerge in the light of the detailed description which follows and which describes a preferred embodiment of the invention, illustrated schematically and by way of example, by the appended figures in which:
  • The figure 1 is a simplified plan view of the main organs of the striking mechanism of a timepiece according to the invention wherein the striking hammer is shown in its first position.
  • The figure 2 is a view similar to that of the figure 1 illustrating the striking hammer in its second position.
  • The Figures 3a, 3b and 3c are detailed views in three different setting positions of the ring hammer limiting spring.

La figure 1 représente un mécanisme de sonnerie monté sur une platine 1 formant le bâti de la pièce d'horlogerie ou du module additionnel de la pièce d'horlogerie. Ce mécanisme comprend un barillet de sonnerie 10 comportant un tambour entouré d'une denture 11. Un ressort moteur 12 est logé à l'intérieur du tambour. La denture 11 est en prise avec un pignon 15 solidaire d'une roue de sonnerie 20. Les dents 21 de cette roue permettent d'entraîner alternativement une ancre 30 montée oscillante autour d'un axe de pivotement 33. Cette ancre 30 est solidaire d'un marteau de sonnerie 40, qui forment ensemble un organe de sonnerie. L'ancre sert à faire osciller le marteau de sonnerie pour qu'il frappe périodiquement un organe résonant 50, en l'occurrence un timbre de sonnerie.The figure 1 represents a striking mechanism mounted on a plate 1 forming the frame of the timepiece or the additional module of the timepiece. This mechanism comprises a striking barrel 10 having a drum surrounded by a toothing 11. A motor spring 12 is housed inside the drum. The toothing 11 is engaged with a pinion 15 integral with a ringing wheel 20. The teeth 21 of this wheel can alternately drive an anchor 30 mounted oscillating about a pivot axis 33. This anchor 30 is integral with 'a hammer striking 40, which together form a ringing organ. The anchor is used to oscillate the striking hammer so that it periodically hits a resonant member 50, in this case a ring tone.

A cet effet, cette ancre comporte deux becs ou levées 31, 32, contre lesquelles les dents 21 de la roue de sonnerie 20 glissent alternativement lorsqu'elle est entraînée en rotation par l'organe moteur 10, faisant ainsi osciller l'ancre 30 et par conséquent le marteau de sonnerie 40.For this purpose, this anchor comprises two spouts or lifts 31, 32, against which the teeth 21 of the ringing wheel 20 slide alternately when it is rotated by the motor member 10, thereby oscillating the anchor 30 and therefore the striking hammer 40.

Le fait que l'ancre 30 et le marteau 40 forment un seul organe réduit le nombre d'éléments assemblés dont est composé le mécanisme de sonnerie. Cet organe de sonnerie réunissant l'ancre 30 et le marteau 40 réduit la chaîne des tolérances, mais ne permet cependant pas de minimiser de manière significative la dispersion de la fréquence de frappe du marteau sur le timbre.The fact that the anchor 30 and the hammer 40 form a single member reduces the number of assembled elements which is composed of the striking mechanism. This ringing member joining the anchor 30 and the hammer 40 reduces the chain of tolerances, but however does not significantly minimize the dispersion of the striking frequency of the hammer on the stamp.

Les figures 1 et 2 illustrent les deux positions limites du marteau 40 lors de son mouvement oscillant autour de l'axe 33. A la figure 1 le marteau 40 occupe une première position dans laquelle une partie 41 du marteau percute le timbre 50 pour le faire vibrer. La seconde position du marteau 40 illustrée par la figure 2 est celle où un talon 42 du marteau vient en contact avec un ressort de limitation 60.The figures 1 and 2 illustrate the two limit positions of the hammer 40 during its movement oscillating about the axis 33. At the figure 1 the hammer 40 occupies a first position in which a portion 41 of the hammer hits the stamp 50 to make it vibrate. The second position of the hammer 40 illustrated by the figure 2 is where a heel 42 of the hammer comes into contact with a limitation spring 60.

De préférence, le ressort de limitation 60 est mis en précontrainte contre une surface d'appui 69, réglable de préférence. Le ressort de limitation est avantageusement constitué par une lame ressort qui est fixée au bâti 1 par une de ses extrémités, par exemple par encastrement de celle-ci à l'aide d'un organe de fixation 65 et dont l'extrémité libre 61 constitue la partie servant à limiter la course du marteau 40 de manière élastique. En effet, le talon 42 du marteau 40 est destiné à venir au contact du ressort 60, entre l'extrémité libre 61 de la lame ressort et l'endroit où cette lame appuie contre la surface d'appui 69.Preferably, the limiting spring 60 is prestressed against a bearing surface 69, preferably adjustable. The limiting spring is advantageously constituted by a leaf spring which is fixed to the frame 1 by one of its ends, for example by embedding thereof with the aid of a fixing member 65 and whose free end 61 constitutes the part serving to limit the stroke of the hammer 40 in an elastic manner. Indeed, the heel 42 of the hammer 40 is intended to come into contact with the spring 60, between the free end 61 of the blade spring and the place where the blade bears against the bearing surface 69.

Dans cet exemple, la longueur de la lame du ressort de limitation 60 est de l'ordre de 12 mm et sa section est de l'ordre de 0.65 x 0.1 mm. La distance qui sépare l'organe de fixation 65 de la surface d'appui 69 est de 9 mm environ.In this example, the length of the leaf of the limitation spring 60 is of the order of 12 mm and its section is of the order of 0.65 x 0.1 mm. The distance between the fastener 65 and the bearing surface 69 is about 9 mm.

Selon le mode de réalisation préféré illustré par les figures 3a, 3b et 3c, la surface d'appui 69 est constituée par la face latérale d'un organe de précontrainte 70 se présentant par exemple sous la forme d'un excentrique de réglage 71 dont la face supérieure présente une fente diamétrale de préhension 72 pour permettre de régler sa position angulaire et donc la précontrainte de la lame du ressort de limitation 60, à l'aide d'un tournevis.According to the preferred embodiment illustrated by the Figures 3a, 3b and 3c , the bearing surface 69 is constituted by the lateral face of a prestressing member 70, for example in the form of a control eccentric 71 whose upper face has a diametrical gripping slot 72 to allow its angular position and thus the prestressing of the leaf of the limitation spring 60, using a screwdriver.

Sur la figure 3a, l'excentrique 71 a été tourné dans la position dans laquelle la partie de sa surface latérale la plus éloignée de l'axe de rotation est en contact avec la lame du ressort de limitation 60. La flèche de cette dernière est alors maximale, typiquement de l'ordre de 0.7 mm, en l'occurrence égale à 0.67 mm.On the figure 3a , the eccentric 71 has been rotated in the position in which the part of its lateral surface farthest from the axis of rotation is in contact with the leaf of the limiting spring 60. The arrow of the latter is then maximal, typically of the order of 0.7 mm, in this case equal to 0.67 mm.

Sur la figure 3b, l'excentrique 71 est ajusté dans une position intermédiaire, de façon à ce que la flèche de la lame du ressort de limitation 60 soit typiquement de l'ordre de 0.3 mm, en l'occurrence égale à 0.33 mm.On the figure 3b , the eccentric 71 is adjusted in an intermediate position, so that the deflection of the leaf of the limiting spring 60 is typically of the order of 0.3 mm, in this case equal to 0.33 mm.

Sur la figure 3c, l'excentrique 71 a été tourné de manière à ce que la surface d'appui 69 ne soit plus en contact avec la lame du ressort de limitation. Il en résulte que cette dernière n'est alors plus armée et ne subit aucune contrainte mécanique dans cette position.On the figure 3c the eccentric 71 has been rotated so that the bearing surface 69 is no longer in contact with the leaf of the limiting spring. As a result, the latter is no longer armed and does not undergo any mechanical constraint in this position.

Lorsque le talon 42 du marteau 40 arrive au contact du ressort de limitation 60, ce dernier subit un fléchissement plus ou moins important. Ce fléchissement est fonction d'une part de l'énergie mécanique du marteau lors de son arrivée dans sa seconde position et d'autre part de la précontrainte exercée sur la lame du ressort de limitation 60. Ce ressort 60 fait office d'amortisseur et permet d'atténuer le choc résultant du contact entre l'une des dents 21 de la roue de sonnerie et le bec 31 de l'ancre, ce qui réduit le bruit parasite et l'usure du mécanisme. L'amortissement du choc est proportionnel à l'énergie mécanique du marteau. Il en résulte que les effets de rebond de l'ancre sur la roue de sonnerie sont réduits, quelle que soit l'orientation du marteau dans le champ de pesanteur. L'influence de la position spatiale de la montre sur la dynamique de frappe du marteau s'en trouve ainsi limitée, ce qui améliore la régularité de la frappe, la durée de la sonnerie de même que sa qualité sonore.When the heel 42 of the hammer 40 comes into contact with the limiting spring 60, the latter undergoes a more or less significant deflection. This sag is a function of the mechanical energy of the hammer when it arrives in its second position and secondly the preload exerted on the leaf of the limitation spring 60. This spring 60 acts as a damper and reduces the shock resulting from the contact between one of the teeth 21 of the wheel the bell and the spout 31 of the anchor, which reduces the parasitic noise and wear of the mechanism. Shock absorption is proportional to the mechanical energy of the hammer. As a result, the rebound effects of the anchor on the ringing wheel are reduced, regardless of the orientation of the hammer in the gravitational field. The influence of the spatial position of the watch on the hammer striking dynamics is thus limited, which improves the regularity of the striking, the duration of the ring as well as its sound quality.

Lorsque le marteau passe de sa seconde position à sa première position, l'énergie restituée par le ressort de limitation 60 s'ajoute à l'impulsion transmise à l'ancre par la roue de sonnerie pour déplacer le marteau contre le timbre. L'énergie restituée accélère le marteau lors de son déplacement en direction de l'organe résonant et influence ainsi la cadence de frappe. Ce mouvement de va-et-vient du marteau s'effectue tant que la sonnerie n'est pas arrêtée ou tant que le ressort de barillet n'est pas désarmé.When the hammer moves from its second position to its first position, the energy restored by the limiting spring 60 is added to the pulse transmitted to the anchor by the ringing wheel to move the hammer against the stamp. The restored energy accelerates the hammer during its movement towards the resonant organ and thus influences the rate of striking. This reciprocating movement of the hammer occurs as long as the ringing is not stopped or until the mainspring is disarmed.

Les tableaux 1 et 2 regroupent les résultats des valeurs obtenues lors de tests pratiqués en laboratoire pour mesurer la durée de fonctionnement de la sonnerie, respectivement la fréquence de frappe du marteau en fonction de deux paramètres variables. Les valeurs invariables qui caractérisent le mécanisme testé sont les suivantes:

  • Couple maximum du ressort de barillet 12: 3.3mN·m
  • Couple maximum de la roue de sonnerie 20: 0.55mN·m
  • Inertie du marteau 40: 83g·mm2
  • Section de la lame du ressort 60: 0.65mm x 0.1mm
  • Longueur active de la lame du ressort 60: 12mm.
Tables 1 and 2 summarize the results of the values obtained during laboratory tests to measure the operating time of the ring, respectively the striking frequency of the hammer according to two variable parameters. The invariable values that characterize the tested mechanism are as follows:
  • Maximum torque of cylinder spring 12: 3.3mN · m
  • Maximum torque of the ringing wheel 20: 0.55mN · m
  • Inertia of the hammer 40: 83g · mm 2
  • Spring blade section 60: 0.65mm x 0.1mm
  • Active length of the spring blade 60: 12mm.

Le tableau 1 donne la durée en secondes de la sonnerie en fonction des deux paramètres variables susmentionnés. Le premier paramètre correspond à la valeur de précontrainte du ressort de limitation 60 qui, dans le cas présent, se traduit par les trois positions de la surface d'appui 69 de l'excentrique 71 aux figures 3a, 3b et 3c, que l'on peut comparer avec le comportement d'un mécanisme sans ressort de limitation, mais à butée fixe. Le second paramètre est celui de l'orientation de la pièce d'horlogerie dans l'espace selon cinq positions différentes. Les positions de la montre CH, 3H, 9H, 12H et 6H, correspondent à l'orientation du mécanisme de sonnerie tel qu'il apparait lorsque la pièce d'horlogerie est respectivement disposée dans un plan horizontal, cadran tourné vers le haut, puis dans un plan vertical où le chiffre 3 des heures du cadran, puis le chiffre 9, le chiffre 12 et enfin le chiffre 6 pointent au zénith. TABLEAU 1 Durée [s] CH 3H 9H 12H 6H Moyenne Dispersion (3·Sigma) Réglage 1 10.1 10.7 9.9 10.1 10.5 10.3 1.0 Réglage 2 12.2 12.5 12.7 12.8 13.7 12.8 1.6 Réglage 3 16.1 14.5 18.8 16.1 15.9 16.3 4.7 Sans butée 15.9 14.6 18.3 16.3 15.8 16.2 4.1 Table 1 gives the duration in seconds of the ring according to the two variable parameters mentioned above. The first parameter corresponds to the prestressing value of the limiting spring 60 which, in this case, results in the three positions of the bearing surface 69 of the eccentric 71 to the Figures 3a, 3b and 3c , which can be compared with the behavior of a mechanism without limiting spring, but fixed stop. The second parameter is that of the orientation of the timepiece in space in five different positions. The positions of the watch CH, 3H, 9H, 12H and 6H, correspond to the orientation of the striking mechanism as it appears when the timepiece is respectively arranged in a horizontal plane, dial facing up, then in a vertical plane where the digit 3 hours of the dial, then the number 9, the number 12 and finally the number 6 point to the zenith. TABLE 1 Duration [s] CH 3H 9H 12H 6H Average Dispersion (3 · Sigma) Setting 1 10.1 10.7 9.9 10.1 10.5 10.3 1.0 Setting 2 12.2 12.5 12.7 12.8 13.7 12.8 1.6 Setting 3 16.1 14.5 18.8 16.1 15.9 16.3 4.7 Without stop 15.9 14.6 18.3 16.3 15.8 16.2 4.1

Le second tableau donne les valeurs de la fréquence de frappe du marteau en fonction des mêmes paramètres que ceux décrits précédemment. TABLEAU 2 Fréquence de frappe [Hz] CH 3H 9H 12H 6H Moyenne Dispersion (3·Sigma) Réglage 1 66.0 61.4 64.3 63.7 60.8 63.2 6.4 Réglage 2 55.3 52.1 52.8 52.8 49.1 52.4 6.7 Réglage 3 41.5 45.5 39.0 42.8 42.6 42.3 7.1 Sans butée 40.0 46.0 37.8 41.2 43.2 41.6 9.4 The second table gives the values of hammer strike frequency according to the same parameters as those described previously. TABLE 2 Typing frequency [Hz] CH 3H 9H 12H 6H Average Dispersion (3 · Sigma) Setting 1 66.0 61.4 64.3 63.7 60.8 63.2 6.4 Setting 2 55.3 52.1 52.8 52.8 49.1 52.4 6.7 Setting 3 41.5 45.5 39.0 42.8 42.6 42.3 7.1 Without stop 40.0 46.0 37.8 41.2 43.2 41.6 9.4

Du tableau 1, on constate que la position angulaire de l'excentrique de réglage 71 et donc la valeur de la précontrainte influence directement la durée de la sonnerie. Plus la force de réaction du ressort de limitation est significative, moins la durée de sonnerie est importante. Cela s'explique par le fait que la force de réaction exercée sur le marteau de sonnerie 40 vient s'ajouter à l'impulsion fournie par la roue de sonnerie 20 et provoque un dévidement accéléré du ressort de barillet 12. Le tableau 2 montre que cela se traduit naturellement par une cadence de frappe plus élevée.From Table 1, it can be seen that the angular position of the adjustment eccentric 71 and thus the value of the prestressing directly influences the duration of the striking. The more the reaction force of the limiting spring is significant, the shorter the ringing time is important. This is explained by the fact that the reaction force exerted on the striking hammer 40 is added to the pulse provided by the striking wheel 20 and causes an accelerated unwinding of the mainspring 12. Table 2 shows that this naturally results in a higher typing rate.

Quant au second paramètre, il montre que la précontrainte du ressort de limitation 60 a pour effet de réduire l'influence de la pesanteur sur le mécanisme de sonnerie. Plus la force de réaction du ressort de limitation est importante, moins le mécanisme de sonnerie est sensible aux variations de position dans l'espace. Cela s'explique par le fait que le ressort de limitation contribue d'une part à relancer le marteau et d'autre part joue le rôle d'amortisseur de l'ancre contre la roue de sonnerie ce qui permet d'obtenir une fréquence de frappe plus homogène dans les différentes positions spatiales.As for the second parameter, it shows that the preloading of the limiting spring 60 has the effect of reducing the influence of gravity on the striking mechanism. The greater the reaction force of the limiting spring, the less the striking mechanism is sensitive to variations in position in the space. This is explained by the fact that the limiting spring contributes on the one hand to revive the hammer and on the other hand acts as damper of the anchor against the ringing wheel which allows to obtain a frequency of strikes more homogeneous in different spatial positions.

Le tableau 1 montre que la dispersion de la durée de sonnerie est près de cinq fois plus importante lorsque le ressort de limitation 60 n'est pas précontraint que lorsqu'il est soumis à une précontrainte maximum conformément à la figure 3a.Table 1 shows that the dispersion of the ringing time is nearly five times higher when the limiting spring 60 is prestressed only when it is subjected to a maximum preload in accordance with the figure 3a .

Bien que l'association d'un excentrique pour régler la position de la surface d'appui 69 corresponde au mode de réalisation préféré de l'invention, tout autre système de réglage, par exemple à vis, autorisant un déplacement mesuré ainsi qu'un blocage d'une surface apte à définir une position d'appui réglable peut être utilisé. De même, alors que dans l'exemple illustré la surface d'appui 69 est située sur l'excentrique 71, cette surface d'appui pourrait se trouver sur une autre pièce distincte de l'excentrique et reliée cinématiquement à lui.Although the combination of an eccentric to adjust the position of the bearing surface 69 corresponds to the preferred embodiment of the invention, any other adjustment system, for example screw, allowing a measured displacement and a Blocking a surface capable of defining an adjustable support position can be used. Similarly, while in the illustrated example the bearing surface 69 is located on the eccentric 71, this bearing surface could be on another piece distinct from the eccentric and kinematically connected to it.

Grâce à l'objet de la présente invention, il devient non seulement possible de régler la durée de la sonnerie en ajustant la fréquence de frappe du marteau par l'intermédiaire du moyen de réglage, mais également d'obtenir un mécanisme de sonnerie qui soit moins sensible à l'orientation de la montre dans l'espace et n'interférant pas avec le son émis par l'organe résonant. En outre, le ressort de limitation permet de réduire le risque de cisaillement de l'axe de pivotement de l'ancre 33 et d'éviter l'usure prématurée du mécanisme de sonnerie.With the object of the present invention, it becomes not only possible to adjust the duration of the ring by adjusting the striking frequency of the hammer through the adjusting means, but also to obtain a striking mechanism that is less sensitive to the orientation of the watch in space and not interfering with the sound emitted by the resonant organ. In addition, the limiting spring reduces the risk of shearing the pivot axis of the anchor 33 and prevent premature wear of the striking mechanism.

Claims (5)

Pièce d'horlogerie comportant un bâti (1) portant un mécanisme de sonnerie qui comprend : - un organe moteur (10) en liaison cinématique avec une roue de sonnerie (20), - un marteau de sonnerie (40), - une ancre (30) comportant deux levées (31,32) en prise alternativement avec ladite roue de sonnerie (20) et coopérant avec ledit marteau de sonnerie (40) pour le faire osciller entre une première position de frappe d'un organe résonant (50) et une seconde position, et - un ressort de limitation (60) définissant ladite seconde position, caractérisée en ce que l'ancre (30) et le marteau de sonnerie (40) forment un seul organe de sonnerie monté pivotant sur le bâti (1).Timepiece comprising a frame (1) carrying a striking mechanism which comprises: - a drive member (10) kinematically connected to a ringing wheel (20), a striking hammer (40), - An anchor (30) having two lifts (31,32) alternately engaged with said ringing wheel (20) and cooperating with said striking hammer (40) to oscillate between a first striking position of a resonant member (50) and a second position, and a limiting spring (60) defining said second position, characterized in that the anchor (30) and the striking hammer (40) form a single ring member pivotally mounted on the frame (1). Pièce d'horlogerie selon la revendication 1, dans laquelle ledit ressort de limitation (60) est associé à un organe de précontrainte (70).Timepiece according to claim 1, wherein said limiting spring (60) is associated with a prestressing member (70). Pièce d'horlogerie selon l'une des revendications 1 et 2, dans laquelle ledit organe de précontrainte (70) comprend ou est cinématiquement solidaire d'un organe de réglage (71) de la précontrainte.Timepiece according to one of claims 1 and 2, wherein said prestressing member (70) comprises or is kinematically integral with a prestressing adjusting member (71). Pièce d'horlogerie selon l'une des revendications 1 à 3, dans laquelle ledit ressort de limitation (60) est une lame encastrée à une extrémité, en appui contre ledit organe de précontrainte (70) entre son extrémité encastrée et l'endroit de contact de cette lame avec ledit marteau de sonnerie (40).Timepiece according to one of claims 1 to 3, wherein said limiting spring (60) is a blade embedded at one end, bearing against said biasing member (70) between its end embedded and the location of contact of this blade with said striking hammer (40). Pièce d'horlogerie selon l'une des revendications 2 et 3, dans laquelle ledit organe de précontrainte (70) comprend ou est cinématiquement solidaire d'un excentrique (71) de réglage présentant une fente de préhension diamétrale 72.Timepiece according to one of claims 2 and 3, wherein said prestressing member (70) comprises or is kinematically integral with an eccentric (71) adjustment having a diametrical gripping slot 72.
EP12405015.4A 2011-02-07 2012-02-02 Timepiece Active EP2485098B1 (en)

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CN114384786A (en) * 2020-10-06 2022-04-22 斯沃奇集团研究和开发有限公司 Winding-limiting device for timepiece barrel

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JP2012163558A (en) 2012-08-30
EP2485098B1 (en) 2021-11-03
US8842502B2 (en) 2014-09-23

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