EP3650953B1 - Timepiece mechanism comprising a star and a jumper spring - Google Patents

Timepiece mechanism comprising a star and a jumper spring Download PDF

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Publication number
EP3650953B1
EP3650953B1 EP18205271.2A EP18205271A EP3650953B1 EP 3650953 B1 EP3650953 B1 EP 3650953B1 EP 18205271 A EP18205271 A EP 18205271A EP 3650953 B1 EP3650953 B1 EP 3650953B1
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EP
European Patent Office
Prior art keywords
star
rigid element
slide
timepiece mechanism
jumper spring
Prior art date
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Application number
EP18205271.2A
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German (de)
French (fr)
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EP3650953A1 (en
Inventor
Samuel Tanner
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Patek Philippe SA Geneve
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Patek Philippe SA Geneve
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Priority to EP18205271.2A priority Critical patent/EP3650953B1/en
Publication of EP3650953A1 publication Critical patent/EP3650953A1/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
    • G04B13/00—Gearwork
    • G04B13/002—Gearwork where rotation in one direction is changed into a stepping movement
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B19/00—Indicating the time by visual means
    • G04B19/02—Back-gearing arrangements between gear train and hands
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B27/00—Mechanical devices for setting the time indicating means
    • G04B27/005—Mechanical devices for setting the time indicating means stepwise or on determined values

Definitions

  • the present invention relates to a watch mechanism comprising a star and a jumper spring biased against the star, the jumper spring comprising a rigid element having a protrusion arranged to cooperate with the star, and at least one elastic portion which is arranged to at least partially surround the star, the watch mechanism further comprising a support on which the spring-jumper is movably mounted, the support comprising a support structure arranged to tension the spring-jumper while retaining said at least one elastic portion so that the rigid element is biased against the star, and further comprising guide means arranged to allow the rigid element to be lifted by one of the teeth of the star and then fall back between two teeth of the star. this one.
  • star usually designates a disc pivoted about an axis and provided with triangular teeth adapted to cooperate with a jumper.
  • jumper it usually designates an organ terminated by two inclined planes which press between the points of two consecutive teeth of a star under the action of a spring, to maintain it in a certain angular position. When the star is actuated, the teeth raise the jumper which then falls between two other teeth. A jumper generally allows the star to move in both directions.
  • a known application of mechanisms comprising a star and a jumper returned against the star by a spring is that of elastic coupling mechanisms.
  • These mechanisms are used in particular in time-setting devices which make it possible to advance, step by step, the hour hand of a timepiece, to the value of one hour at each step, without driving the minute hand.
  • Timepieces equipped with this type of device have the advantage of allowing their user to very easily reset the timepiece to the time, when he passes from one time zone to another during a travel.
  • a timepiece permitting the correction of the time zone may for example comprise a minute hand carried by a roadway driven in rotation by the movement, and an hour wheel (or barrel wheel) driven by the roadway via a timer cog.
  • the hour wheel of such a timepiece does not, in principle, directly carry the hour hand. Indeed, the latter is carried by a second hour barrel which is rotatably mounted coaxially with the hour wheel.
  • An elastic coupling mechanism comprising a star and a jumper returned against the star by a spring, is also interposed between the hour wheel and the second barrel. The elastic coupling mechanism allows the hour wheel to drive the second barrel while offering a clutch / disengage function and selective indexing of the hour hand in twelve angular positions evenly spaced from each other on the turn of hours.
  • the hour wheel does not, in principle, carry the hour hand. It is worth pointing out, however, that other well-known timepieces have two hour hands. A classic hour hand is carried in the traditional way by the hour wheel, and an additional hour hand is carried by the second barrel.
  • the figures 1 and 2 are top plan views of two elastic coupling mechanisms of the prior art, each comprising a star and a jumper biased against the star by a spring.
  • a star with twelve teeth 24 fixed concentrically on a second gun for hours 22, a jumper 25 pivoted (in D) on the plate of the hour wheel 27, and a return spring 26 also fixed on the plate of the hour wheel.
  • the known elastic coupling mechanism which is illustrated in figure 1 , usually gives satisfaction.
  • the mechanism of the figure 1 may cause difficulties, especially during assembly.
  • the known elastic coupling mechanism which is shown in figure 2 is taken from the patent document FR 2 307 301 . It also conforms to the definition given in the preamble of the present patent application.
  • the jumper spring 8 is fixed to the hours wheel board by a pin 9. It can also be seen that the jumper spring 8 is annular in shape and that it surrounds the star 7.
  • the jumper spring 8 is fixed on the plate of the hours wheel 4 inside the rim 3 by the pin 9.
  • the combination of the pin 9 and the rim 3 constitutes guide means preventing the jumper spring 8 to pivot around the pin 9, while leaving the rigid element 11 free to move by deformation of the elastic portion 12, so as to allow the rigid element to be lifted by one of the teeth of the star 17 and then to fall back between two teeth of the latter.
  • the pin 9 also acts as a support structure making it possible to put the spring-jumper 8 under tension, so that the rigid element 11 is biased against the star 7.
  • an advantage of that of the figure 2 is that it eliminates having two components to power up with each other. This difference is likely to facilitate assembly of the mechanism.
  • the mechanism of figure 2 there are also certain flaws.
  • the production of an hour wheel 4 which carries a circular rim 3 on its plate involves relatively complex machining or finishing operations.
  • the presence of the rim 3 has the effect of considerably increasing the thickness of the hours wheel 4.
  • the circular rim does not completely prevent the jumper spring 8 from pivoting by a certain angle. around the pin 9 when the star 7 is actuated and the teeth cause the deformation of the elastic portion 12 by lifting the rigid part 11. This residual pivoting can make the indexing of the star 7 and of the star less precise. hour hand.
  • An aim of the present invention is to remedy the drawbacks of the prior art which have just been explained.
  • the present invention achieves this and other object by providing a horological mechanism which comprises a star and a jumper spring and which is in accordance with claim 1 appended hereto.
  • the guide means which allow the rigid element to be lifted by one of the teeth of the star and then to fall back between two teeth of the latter are formed by at least two rectilinear and parallel slides. , which are arranged to move the rigid element in translation parallel to a determined direction relative to the support.
  • the jumper spring comprises at least one elastic arm arranged to at least partially surround the star, and which is secured to the rigid element by one of its ends (called the proximal end).
  • the support structure includes a stop against which the distal end of the elastic arm rests.
  • the jumper spring comprises two elastic arms which are integral with the rigid element on either side of the latter and which are oriented so that they approach the one from the other towards their respective distal ends, the latter being separated from each other by a space.
  • the support structure comprises two stops against which the distal ends of the two elastic arms respectively come to rest. It will be understood that the fact of having two elastic arms separated from one another, but attached to the rigid element on either side of the latter, gives the possibility of arming the arms one after the other. .
  • the fact of having two elastic arms arranged on either side of the rigid part has the advantage of making it possible to reduce the stresses to which the slides are subjected.
  • the figure 3 is a plan view of an elastic coupling mechanism which constitutes a first exemplary embodiment of the watch mechanism comprising a star and a jumper spring of the invention.
  • the coupling mechanism of the figure 3 is part of a time-setting device that allows you to advance, step by step, the hour hand of a timepiece, to the value of one hour at each step, without driving the minute hand. It will be understood that the figure 3 illustrates only the elastic coupling mechanism, the time-setting device therefore not being shown as a whole.
  • the figure 3 shows the hours wheel 65 of a timepiece, a twelve-tooth star 67 which is fixed concentrically on a second hour barrel (not shown) forming part of the time-setting device, and finally a spring- jumper 81 which is carried by the plate of the hour wheel 65.
  • the jumper spring 81 comprises a rigid element 83 having a protrusion 85 arranged to cooperate with the star 67, and a single elastic arm 87 which is integral with the rigid element 83 by one of its ends, and which partially surrounds the star 67. It can be seen that, unlike what was the case in particular with the jumper spring of the prior art illustrated in FIG. figure 2 , the spring-jumper 81 of the figure 3 does not constitute a ring which would completely surround the star 67.
  • the elastic coupling mechanism illustrated in figure 3 comprises a support on which the jumper spring is mounted, and guide means constituted by a plurality of rectilinear and parallel slides, which are arranged to allow the rigid element 83 to be lifted by one of the teeth of the star 67 and then fall back between two teeth of the latter.
  • the slides are each formed of a slide and of a slide arranged to cooperate with the slide.
  • One of the two components of each slide being integral with the support (here constituted by the plate of the hour wheel 65) and the other component being integral with the rigid element 83.
  • the rigid element 83 of the jumper spring 81 shown comprises two slideways in the form of oblongs (arranged parallel to each other). It can be seen that a first slide 89 is arranged close to the protrusion 85, and that the other slide 91 is arranged close to the junction between the rigid part 83 and the proximal end of the arm. elastic 87.
  • two pins (referenced 90 and 92), acting as a slide, protrude from the plate of the hour wheel 65. The two pins are sized so that they can each be inserted into, and guided by, one of the two slides 89 and 91.
  • the two slides each consisting of a pin and an oblong, together form guide means which, in accordance with the invention, allow the rigid element 83 to move in translation parallel to a determined direction relative to the support. It can be seen that the positions of the two slides 89 and 91 are staggered in the determined direction. This feature helps prevent jump spring 81 from pivoting. It can also be seen that, in the example illustrated, the determined direction is parallel to the radius of the star 67 which passes through the top of the prominence 85.
  • the distal end of the elastic arm 87 bears against a stop pin (referenced 95) which projects from the plate of the hours wheel 65.
  • the pin stopper 95 is positioned so that the radius of the star 67 which passes through the stop pin 95 makes an angle ⁇ with the radius of the star which passes through the apex of the prominence 85. This angle ⁇ is equal to 156 °.
  • the protrusion 85 of the rigid element 83 rests between the points of two consecutive teeth of the star 67.
  • the stop pin is arranged so as to keep the elastic arm 87 away from its rest position, which has the effect of recalling the rigid element 83 against the star 67.
  • the stop pin 95 acts as a stop structure which, according to the invention, is arranged to force the jump spring 81 by retaining the elastic arm 87 away from its rest position.
  • the angle ⁇ between the radius of the star 67 which passes through the stop pin 95 and that which passes through the top of the protrusion 85 belongs to the interval between 150 ° and 210 °. It has been seen that in the embodiment which is the subject of the present example, the determined direction in which the rigid element 83 of the spring-jumper 81 is guided in translation is parallel to the radius of the star 67 which passes through the top of the protrusion 85. Under these conditions, the return force in the determined direction is always equal to at least twice the transverse force . This feature prevents the slides from seizing up.
  • the figure 4 is a plan view of an elastic coupling mechanism which constitutes a second exemplary embodiment of the watch mechanism comprising a star and a jumper spring of the invention.
  • the figure 4 shows the hours wheel 15 of a timepiece, a star with twelve teeth 17 which is fixed concentrically on a second hour barrel 19 forming part of the time-setting device, and finally a jumper spring 31 which is carried by the plate of the hour wheel 15.
  • the jumper spring 31 comprises a rigid element 33 having a protrusion 35 arranged to cooperate with the star 17, and two elastic arms 37a, 37b integral with the rigid element 33 on either side of the latter and oriented so that they approach each other in the direction of their respective distal ends, the latter being separated from one another by an area.
  • the spring-jumper 31 generally has the shape of a ring which surrounds the star 17, the ring being open at the level of the space which separates the distal ends of the two curved elastic blades 37a, 37b. It can also be seen that, in the example illustrated, the two elastic arms 37a, 37b are in the form of straight blades.
  • the elastic coupling mechanism and in particular its jumper spring, are symmetrical with respect to an axis which passes through the top of the prominence 35 of the rigid element 33, as well as by the axis of rotation of the star 17.
  • the protrusion 35 is formed by two inclines which are symmetrical to each other and which meet in a vertex located on the axis of symmetry.
  • the two elastic strips 37a and 37b are also symmetrical to one another.
  • the rigid element 33 of the spring-jumper generally has the shape of a sector crown, the inner edge of which has a symmetrical bump in its middle formed by the protrusion 35.
  • the elastic coupling mechanism illustrated in figure 4 comprises a support on which the jumper spring is mounted, and guide means arranged to allow the rigid element 33 to be lifted by one of the teeth of the star 17 and then to fall back between two teeth of the latter .
  • the guide means are constituted by a plurality of slides, each of these being formed of a slide and of a slide arranged to cooperate with the slide, one of them. these two components of the slide being integral with the support (here constituted by the plate of the hour wheel 15) and the other component being integral with the rigid element.
  • the rigid element 33 of the spring-jumper 31 shown comprises three slideways in the form of oblongs (arranged parallel to the axis of symmetry).
  • a first slide 39 is arranged on the axis of symmetry, and the other two slideways 41a, 41b are arranged symmetrically on either side of the rigid element 33, at the junction between the latter and one of the elastic strips 37a or 37b.
  • three pins (referenced 40, 42a and 42b), acting as a slide, protrude from the plate of the hour wheel 15. The three pins are sized so that they can each be inserted into, and guided by. , one of the three slides 39, 41a and 41b. We can see that the three pins are not aligned, but are arranged at the three vertices of an isosceles triangle.
  • the pin 40 is inserted into the oblong 39 and the two pins 42a and 42b are respectively inserted into the oblongs 41a and 41b.
  • the prominence is guided in translation so as to move on the axis of symmetry, and therefore a fortiori on a line passing through the axis of rotation of the star 17 It will further be understood that because the oblongs 39, 41a and 41b are parallel and the three pins 40, 42a and 42b are not aligned, the jumper spring 31 is prevented from pivoting.
  • the two stop pins 45, 46 therefore play the role of a stop structure which, according to the invention, is arranged to force the jump spring 31 by retaining the two curved elastic leaves 37a, 37b so that the rigid element 33 is biased against the star 17. It will also be noted that the forces exerted by the two stop pins 45, 46 on the curved elastic leaves 37a, 37b are symmetrical, so that their resultant is oriented parallel to the axis of symmetry. It will therefore be understood that the resulting force exerted by the stop pins 45, 46 on the jump spring 31 is oriented in the determined direction in which the rigid element 33 of the jump spring 31 is guided in translation.
  • the figure 5 is a plan view of an elastic coupling mechanism which is in accordance with a third exemplary embodiment of the clockwork mechanism comprising a star and a jumper spring of the invention.
  • the elastic coupling mechanism shown in figure 5 is very similar to that of the figure 4 .
  • the differences between the two embodiments shown are limited to a few characteristics of the jumper spring.
  • the elastic arms 137a and 137b of the jumper spring 131 of the figure 5 are in shape curved blades instead of straight blades.
  • each of the two slides 141a and 141b which are arranged symmetrically on the rigid element 133, on either side of the axis of symmetry, is formed of a single lateral guide surface against which the one of the two pins 142a, 142b comes to rest.
  • the side guide surfaces shown in the figure 5 are outer guide surfaces. It will be understood, however, that, according to a variant, the slides 141a and 141b could be constituted by internal guide surfaces.
  • the figure 6 is a plan view of an elastic coupling mechanism which is in accordance with a fourth exemplary embodiment of the clockwork mechanism comprising a star and a jumper spring of the invention.
  • the elastic coupling mechanism shown in figure 6 is very similar to those represented in the figures 4 and 5 .
  • the differences between the different embodiments shown are limited to a few characteristics of the jumper spring.
  • the angle at the center which underlies the rigid element 233 in the form of a crown sector illustrated in figure 6 is greater than 180 degrees, which is not the case with the rigid elements 33 and 133 shown in the figures 4 and 5 .
  • the two slideways 241a and 241b in the form of oblongs are not arranged at the junctions between the rigid element 233 and the two elastic arms 237a and 237b.
  • the two oblongs are respectively arranged on two appendages of the rigid element 233, and these two appendages extend substantially parallel to the elastic arms so that they extend the rigid element beyond the junctions of the rigid element 233 with the two elastic arms 237a and 237b.
  • the slide 239 which is arranged on the axis of symmetry, is constituted by a slot between two parallel flexible blades (respectively referenced 247 and 248).
  • the width of the slot is slightly less than the diameter of the pin 240 which is inserted into the slot.
  • the two flexible blades 247 and 248 grip the pin 240 which has the possibility of sliding in the slot without any lateral play.
  • the figure 7 is a plan view of an elastic coupling mechanism which is in accordance with a fifth exemplary embodiment of the clockwork mechanism comprising a star and a jumper spring of the invention.
  • the elastic coupling mechanism shown in figure 7 is particularly similar to that of the figure 6 .
  • the differences between the two embodiments are limited to a few characteristics of the jumper spring.
  • the jumper spring 331 shown in figure 7 comprises two small auxiliary jumpers (referenced respectively 351 and 352) which are arranged to act as brakes so as to attenuate the angular acceleration caused by the jumper 331 when it falls between two teeth of the star 317.
  • the two flexible blades 347 and 348 of the slideway 339 arranged on the axis of symmetry of the rigid element 333 are secured to the latter by their two ends, instead of just one as is the case with flexible blades 247 and 248 represented in the figure 6 . It will be understood that the slide 339 also makes it possible to obtain guidance without lateral play.
  • the jumper spring of a watch mechanism according to the invention is not necessarily symmetrical.
  • the prominence arranged to cooperate with the star could not be symmetrical.
  • the direction parallel to which the rigid element moves in translation could also not be determined so that the prominence moves on a line passing through the axis of rotation of the star.
  • the horological mechanism of the invention is not limited to the variants in which the star is provided with triangular teeth. Indeed, any toothed wheel whose teeth are suitable for cooperating with a jumper can be used as a star.

Description

La présente invention concerne un mécanisme horloger comprenant une étoile et un ressort-sautoir rappelé contre l'étoile, le ressort-sautoir comportant un élément rigide présentant une proéminence agencée pour coopérer avec l'étoile, et au moins une portion élastique qui est agencée pour entourer au moins partiellement l'étoile, le mécanisme horloger comprenant encore un support sur lequel le ressort-sautoir est monté mobile, le support comportant une structure d'appui agencée pour tendre le ressort-sautoir en retenant ladite au moins une portion élastique de façon à ce que l'élément rigide soit rappelé contre l'étoile, et comprenant en outre des moyens de guidage agencés pour permettre à l'élément rigide d'être soulevé par une des dents de l'étoile et de retomber ensuite entre deux dents de celle-ci.The present invention relates to a watch mechanism comprising a star and a jumper spring biased against the star, the jumper spring comprising a rigid element having a protrusion arranged to cooperate with the star, and at least one elastic portion which is arranged to at least partially surround the star, the watch mechanism further comprising a support on which the spring-jumper is movably mounted, the support comprising a support structure arranged to tension the spring-jumper while retaining said at least one elastic portion so that the rigid element is biased against the star, and further comprising guide means arranged to allow the rigid element to be lifted by one of the teeth of the star and then fall back between two teeth of the star. this one.

ART ANTERIEURPRIOR ART

On connait de nombreux mécanismes horlogers comprenant une étoile et un sautoir rappelé contre l'étoile par un ressort. Dans le domaine de l'horlogerie, le terme « étoile » désigne habituellement un disque pivoté autour d'un axe et muni de dents triangulaires adaptées pour coopérer avec un sautoir. Quant au terme « sautoir », il désigne habituellement un organe terminé par deux plans inclinés qui appuient entre les pointes de deux dents consécutives d'une étoile sous l'action d'un ressort, pour la maintenir dans une certaine position angulaire. Lorsque l'étoile est actionnée, les dents soulèvent le sautoir qui tombe ensuite entre deux autres dents. Un sautoir permet généralement le mouvement de l'étoile dans les deux sens.We know of many watch mechanisms comprising a star and a jumper returned against the star by a spring. In the field of watchmaking, the term “star” usually designates a disc pivoted about an axis and provided with triangular teeth adapted to cooperate with a jumper. As for the term "jumper", it usually designates an organ terminated by two inclined planes which press between the points of two consecutive teeth of a star under the action of a spring, to maintain it in a certain angular position. When the star is actuated, the teeth raise the jumper which then falls between two other teeth. A jumper generally allows the star to move in both directions.

A titre d'exemple, une application connue des mécanismes comprenant une étoile et un sautoir rappelé contre l'étoile par un ressort est celle des mécanismes élastiques d'accouplement. Ces mécanismes sont utilisés notamment dans les dispositifs de mise à l'heure qui permettent de faire avancer, pas-à-pas, l'aiguille des heures d'une pièce d'horlogerie, de la valeur d'une heure à chaque pas, sans entraîner l'aiguille des minutes. Les pièces d'horlogerie équipées de ce type de dispositifs présentent l'avantage de permettre à leur utilisateur de remettre très facilement la pièce d'horlogerie à l'heure, lorsqu'il passe d'un fuseau horaire à un autre au cours d'un voyage.By way of example, a known application of mechanisms comprising a star and a jumper returned against the star by a spring is that of elastic coupling mechanisms. These mechanisms are used in particular in time-setting devices which make it possible to advance, step by step, the hour hand of a timepiece, to the value of one hour at each step, without driving the minute hand. Timepieces equipped with this type of device have the advantage of allowing their user to very easily reset the timepiece to the time, when he passes from one time zone to another during a travel.

Une pièce d'horlogerie permettant la correction du fuseau horaire, comme indiqué ci-dessus, peut par exemple comprendre une aiguille des minutes portée par une chaussée entraînée en rotation par le mouvement, et une roue des heures (ou roue à canon) entraînée par la chaussée par l'intermédiaire d'un rouage de minuterie. Contrairement à ce qui est le cas dans les pièces d'horlogerie ordinaire, la roue des heures d'une telle pièce d'horlogerie ne porte, en principe, pas directement l'aiguille des heures. En effet, cette dernière est portée par un second canon des heures qui est monté rotatif coaxialement à la roue des heures. Un mécanisme élastique d'accouplement, comprenant une étoile et un sautoir rappelé contre l'étoile par un ressort, est encore interposé entre la roue des heures et le second canon. Le mécanisme élastique d'accouplement permet à la roue des heures d'entraîner le second canon tout en offrant une fonction d'embrayage/débrayage et un indexage sélectif de l'aiguille des heures dans douze postions angulaires régulièrement espacées les unes des autres sur le tour d'heures.A timepiece permitting the correction of the time zone, as indicated above, may for example comprise a minute hand carried by a roadway driven in rotation by the movement, and an hour wheel (or barrel wheel) driven by the roadway via a timer cog. Contrary to what is the case in ordinary timepieces, the hour wheel of such a timepiece does not, in principle, directly carry the hour hand. Indeed, the latter is carried by a second hour barrel which is rotatably mounted coaxially with the hour wheel. An elastic coupling mechanism, comprising a star and a jumper returned against the star by a spring, is also interposed between the hour wheel and the second barrel. The elastic coupling mechanism allows the hour wheel to drive the second barrel while offering a clutch / disengage function and selective indexing of the hour hand in twelve angular positions evenly spaced from each other on the turn of hours.

Comme indiqué ci-dessus, la roue des heures ne porte, en principe, pas l'aiguille des heures. Il vaut la peine de préciser toutefois que d'autres pièces d'horlogeries connues comportent deux aiguilles des heures. Une aiguille des heures classique est portée de façon traditionnelle par la roue des heures, et une aiguille des heures supplémentaire est portée par le second canon.As indicated above, the hour wheel does not, in principle, carry the hour hand. It is worth pointing out, however, that other well-known timepieces have two hour hands. A classic hour hand is carried in the traditional way by the hour wheel, and an additional hour hand is carried by the second barrel.

Les figures 1 et 2 sont des vues en plan de dessus de deux mécanismes élastiques d'accouplement de l'art antérieur, qui comprennent chacun une étoile et un sautoir rappelé contre l'étoile par un ressort. En se référant tout d'abord à la figure 1, on peut voir une roue des heures 27, une étoile à douze dents 24 fixée concentriquement sur un second canon des heures 22, un sautoir 25 pivoté (en D) sur la planche de la roue des heures 27, et un ressort de rappel 26 également fixé sur la planche de la roue des heures. Le mécanisme élastique d'accouplement connu, qui est illustré dans la figure 1, donne habituellement satisfaction. Toutefois, lorsque les pièces du mécanisme sont très fines, si le couple que le mécanisme d'accouplement doit vaincre pour entraîner l'affichage de la pièce d'horlogerie est important, le mécanisme de la figure 1 peut causer des difficultés, notamment lors de son assemblage. En effet, si la force du ressort dépasse un certain seuil, le pivot du sautoir ou le ressort lui-même peut se mettre de travers, ou même se déboîter complètement, lorsqu'on met le sautoir sous tension. On comprendra donc que l'assemblage d'un mécanisme du type illustré dans la figure 1 peut se révéler excessivement difficile.The figures 1 and 2 are top plan views of two elastic coupling mechanisms of the prior art, each comprising a star and a jumper biased against the star by a spring. Referring first to the figure 1 , we can see a 27 hour wheel, a star with twelve teeth 24 fixed concentrically on a second gun for hours 22, a jumper 25 pivoted (in D) on the plate of the hour wheel 27, and a return spring 26 also fixed on the plate of the hour wheel. The known elastic coupling mechanism, which is illustrated in figure 1 , usually gives satisfaction. However, when the parts of the mechanism are very thin, if the torque that the coupling mechanism must overcome to drive the display of the timepiece is large, the mechanism of the figure 1 may cause difficulties, especially during assembly. In fact, if the force of the spring exceeds a certain threshold, the pivot of the jumper or the spring itself can get askew, or even disengage completely, when the jumper is under tension. It will therefore be understood that the assembly of a mechanism of the type illustrated in figure 1 can be exceedingly difficult.

Le mécanisme élastique d'accouplement connu qui est représenté dans la figure 2 est tiré du document de brevet FR 2 307 301 . Il est en outre conforme à la définition donnée en préambule de la présente demande de brevet. En se référant à la figure 2, on peut voir une roue des heures 4 dont la planche porte un rebord circulaire 3 agencé concentriquement à la roue des heures, une étoile à douze dents 7 fixée concentriquement sur un second canon des heures 5, et un ressort-sautoir 8 agencé sur la planche de la roue des heures 4, à l'intérieur du rebord 3. Le ressort-sautoir 8 est fixé sur la planche de la roue des heures par une goupille 9. On peut voir encore que le ressort-sautoir 8 est de forme annulaire et qu'il entoure l'étoile 7. On peut voir en outre qu'il comporte un élément rigide 11 présentant une proéminence agencée pour coopérer avec l'étoile 7, et une portion élastique 12 en arc de cercle qui est solidaire de l'élément rigide 11 de part et d'autre de ce dernier. Le ressort-sautoir 8 est fixé sur la planche de la roue des heures 4 à l'intérieur du rebord 3 par la goupille 9. L'association de la goupille 9 et du rebord 3 constitue des moyens de guidage empêchant le ressort-sautoir 8 de pivoter autour de la goupille 9, tout en laissant l'élément rigide 11 libre de se déplacer par déformation de la portion élastique 12, de manière à permettre à l'élément rigide d'être soulevé par une des dents de l'étoile 17 et de retomber ensuite entre deux dents de celle-ci. La goupille 9 fait en outre office de structure d'appui permettant de mettre le ressort-sautoir 8 sous tension, de façon que l'élément rigide 11 soit rappelé contre l'étoile 7.The known elastic coupling mechanism which is shown in figure 2 is taken from the patent document FR 2 307 301 . It also conforms to the definition given in the preamble of the present patent application. With reference to the figure 2 , we can see an hours wheel 4 whose plate carries a circular rim 3 arranged concentrically with the hour wheel, a star with twelve teeth 7 fixed concentrically on a second hour barrel 5, and a jumper spring 8 arranged on the hours wheel board 4, inside the flange 3. The jumper spring 8 is fixed to the hours wheel board by a pin 9. It can also be seen that the jumper spring 8 is annular in shape and that it surrounds the star 7. It can also be seen that it comprises a rigid element 11 having a protrusion arranged to cooperate with the star 7, and an elastic portion 12 in the form of an arc of a circle which is integral with the rigid element 11 on either side of the latter. The jumper spring 8 is fixed on the plate of the hours wheel 4 inside the rim 3 by the pin 9. The combination of the pin 9 and the rim 3 constitutes guide means preventing the jumper spring 8 to pivot around the pin 9, while leaving the rigid element 11 free to move by deformation of the elastic portion 12, so as to allow the rigid element to be lifted by one of the teeth of the star 17 and then to fall back between two teeth of the latter. The pin 9 also acts as a support structure making it possible to put the spring-jumper 8 under tension, so that the rigid element 11 is biased against the star 7.

En comparaison avec le mécanisme d'accouplement de la figure 1, un avantage de celui de la figure 2 est qu'il permet de ne plus avoir deux composants à mettre sous tension l'un avec l'autre. Cette différence est susceptible de faciliter l'assemblage du mécanisme. Le mécanisme de la figure 2 présente toutefois également certains défauts. En effet, la réalisation d'une roue des heures 4 qui porte sur sa planche un rebord circulaire 3 implique des opérations d'usinage ou de terminaison relativement complexes. De plus, la présence du rebord 3 a pour effet d'augmenter considérablement l'épaisseur de la roue des heures 4. Enfin, on comprendra que le rebord circulaire n'empêche pas totalement le ressort-sautoir 8 de pivoter d'un certain angle autour de la goupille 9 lorsque l'étoile 7 est actionnée et que les dents provoquent la déformation de la portion élastique 12 en soulevant la partie rigide 11. Ce pivotement résiduel peut rendre moins précis l'indexage de l'étoile 7 et de l'aiguille des heures.In comparison with the coupling mechanism of the figure 1 , an advantage of that of the figure 2 is that it eliminates having two components to power up with each other. This difference is likely to facilitate assembly of the mechanism. The mechanism of figure 2 However, there are also certain flaws. In fact, the production of an hour wheel 4 which carries a circular rim 3 on its plate involves relatively complex machining or finishing operations. In addition, the presence of the rim 3 has the effect of considerably increasing the thickness of the hours wheel 4. Finally, it will be understood that the circular rim does not completely prevent the jumper spring 8 from pivoting by a certain angle. around the pin 9 when the star 7 is actuated and the teeth cause the deformation of the elastic portion 12 by lifting the rigid part 11. This residual pivoting can make the indexing of the star 7 and of the star less precise. hour hand.

BREF EXPOSE DE L'INVENTIONBRIEF PRESENTATION OF THE INVENTION

Un but de la présente invention est de remédier aux inconvénients de l'art antérieur qui viennent d'être expliqués. La présente invention atteint ce but ainsi que d'autres en fournissant un mécanisme horloger qui comprend une étoile et un ressort-sautoir et qui est conforme à la revendication 1 annexée.An aim of the present invention is to remedy the drawbacks of the prior art which have just been explained. The present invention achieves this and other object by providing a horological mechanism which comprises a star and a jumper spring and which is in accordance with claim 1 appended hereto.

Conformément à l'invention, les moyens de guidage qui permettent à l'élément rigide d'être soulevé par une des dents de l'étoile et de retomber ensuite entre deux dents de celle-ci sont constitués par au moins deux coulisses rectilignes et parallèles, qui sont agencées pour faire se déplacer l'élément rigide en translation parallèlement à une direction déterminée relativement au support. On comprendra donc notamment que du fait que les déplacements de la proéminence, lorsqu'elle est soulevée par une des dents de l'étoile et lorsqu'elle retombe ensuite entre deux dents de celle-ci, se limitent à des translations, l'indexage de l'étoile peut être réalisé avec une précision angulaire améliorée.According to the invention, the guide means which allow the rigid element to be lifted by one of the teeth of the star and then to fall back between two teeth of the latter are formed by at least two rectilinear and parallel slides. , which are arranged to move the rigid element in translation parallel to a determined direction relative to the support. It will therefore be understood in particular that due to the fact that the displacements of the prominence, when it is lifted by one of the teeth of the star and when it then falls back between two teeth of the latter, are limited to translations, the indexing of the star can be carried out with improved angular precision.

Conformément à l'invention, le ressort-sautoir comprend au moins un bras élastique agencé pour entourer au moins partiellement l'étoile, et qui est solidaire de l'élément rigide par une de ses extrémités (dite extrémité proximale). De plus, la structure d'appui comporte un arrêt contre lequel vient s'appuyer l'extrémité distale du bras élastique. On comprendra que le fait de mettre le ressort-sautoir sous tension à l'aide d'un arrêt, contre lequel le bras élastique vient simplement en appui, facilite considérablement l'assemblage du mécanisme de l'invention.According to the invention, the jumper spring comprises at least one elastic arm arranged to at least partially surround the star, and which is secured to the rigid element by one of its ends (called the proximal end). In addition, the support structure includes a stop against which the distal end of the elastic arm rests. It will be understood that the fact of putting the jumper spring under tension by means of a stop, against which the elastic arm simply bears, considerably facilitates the assembly of the mechanism of the invention.

Conformément à un mode de réalisation particulier de l'invention, le ressort-sautoir comprend deux bras élastiques qui sont solidaires de l'élément rigide de part et d'autre de ce dernier et qui sont orientés de sorte qu'ils se rapprochent l'un de l'autre en direction de leurs extrémités distales respectives, ces dernières étant séparées l'une de l'autre par un espace. On comprendra de ce qui précède que les bras élastiques se referment partiellement autour de l'étoile. De plus, selon ce mode de réalisation particulier, la structure d'appui comporte deux arrêts contre lesquels viennent respectivement s'appuyer les extrémités distales des deux bras élastiques. On comprendra que le fait d'avoir deux bras élastiques séparés l'un de l'autre, mais rattachés à l'élément rigide de part et d'autre de ce dernier, donne la possibilité d'armer les bras un après l'autre. De plus, le fait d'avoir deux bras élastiques agencés de part et d'autre de la partie rigide à l'avantage de permettre de réduire les contraintes que subissent les coulisses.According to a particular embodiment of the invention, the jumper spring comprises two elastic arms which are integral with the rigid element on either side of the latter and which are oriented so that they approach the one from the other towards their respective distal ends, the latter being separated from each other by a space. It will be understood from the above that the elastic arms partially close around the star. In addition, according to this particular embodiment, the support structure comprises two stops against which the distal ends of the two elastic arms respectively come to rest. It will be understood that the fact of having two elastic arms separated from one another, but attached to the rigid element on either side of the latter, gives the possibility of arming the arms one after the other. . In addition, the fact of having two elastic arms arranged on either side of the rigid part has the advantage of making it possible to reduce the stresses to which the slides are subjected.

BREVE DESCRIPTION DES FIGURESBRIEF DESCRIPTION OF THE FIGURES

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

  • la figure 1 est une vue en plan d'un premier mécanisme élastique d'accouplement de l'art antérieur ;
  • la figure 2 est une vue en plan d'un second mécanisme élastique d'accouplement de l'art antérieur ;
  • la figure 3 est une vue en plan d'un mécanisme élastique d'accouplement qui est conforme à un premier mode de réalisation particulier du mécanisme horloger comprenant une étoile et un ressort-sautoir de l'invention ;
  • la figure 4 est une vue en plan d'un mécanisme élastique d'accouplement qui est conforme à un deuxième mode de réalisation particulier du mécanisme horloger comprenant une étoile et un ressort-sautoir de l'invention ;
  • la figure 5 est une vue en plan d'un mécanisme élastique d'accouplement qui est conforme à un troisième mode de réalisation particulier du mécanisme horloger comprenant une étoile et un ressort-sautoir de l'invention ;
  • la figure 6 est une vue en plan d'un mécanisme élastique d'accouplement qui est conforme à un quatrième mode de réalisation particulier du mécanisme horloger comprenant une étoile et un ressort-sautoir de l'invention
  • la figure 7 est une vue en plan d'un mécanisme élastique d'accouplement qui est conforme à un cinquième mode de réalisation particulier du mécanisme horloger comprenant une étoile et un ressort-sautoir de l'invention.
Other characteristics and advantages of the present invention will become apparent on reading the description which follows, given solely by way of non-limiting example, and made with reference to the appended drawings in which:
  • the figure 1 is a plan view of a first elastic coupling mechanism of the prior art;
  • the figure 2 is a plan view of a second elastic coupling mechanism of the prior art;
  • the figure 3 is a plan view of an elastic coupling mechanism which conforms to a first particular embodiment of the watch mechanism comprising a star and a jumper spring of the invention;
  • the figure 4 is a plan view of an elastic coupling mechanism which conforms to a second particular embodiment of the watch mechanism comprising a star and a jumper spring of the invention;
  • the figure 5 is a plan view of an elastic coupling mechanism which conforms to a third particular embodiment of the watch mechanism comprising a star and a jumper spring of the invention;
  • the figure 6 is a plan view of an elastic coupling mechanism which conforms to a fourth particular embodiment of the watch mechanism comprising a star and a jumper spring of the invention
  • the figure 7 is a plan view of an elastic coupling mechanism which conforms to a fifth particular embodiment of the watch mechanism comprising a star and a jumper spring of the invention.

DESCRIPTION DETAILLEE DE PLUSIEURS MODES DE REALISATIONDETAILED DESCRIPTION OF SEVERAL EMBODIMENTS

Dans la description qui suit, le terme « coulisseau » est à comprendre dans le sens de la partie mobile d'une coulisse, une coulisse étant elle-même définie comme un ensemble formé par une glissière et une partie mobile agencée pour coopérer avec la glissière. La figure 3 est une vue en plan d'un mécanisme élastique d'accouplement qui constitue un premier mode de réalisation exemplaire du mécanisme horloger comprenant une étoile et un ressort-sautoir de l'invention. Conformément au présent exemple, le mécanisme d'accouplement de la figure 3 fait partie d'un dispositif de mise à l'heure qui permet de faire avancer, pas-à-pas, l'aiguille des heures d'une pièce d'horlogerie, de la valeur d'une heure à chaque pas, sans entraîner l'aiguille des minutes. On comprendra que la figure 3 illustre uniquement le mécanisme élastique d'accouplement, le dispositif de mise à l'heure n'étant donc pas représenté dans son ensemble.In the following description, the term "slide" is to be understood in the sense of the movable part of a slide, a slide itself being defined as an assembly formed by a slide and a movable part arranged to cooperate with the slide. . The figure 3 is a plan view of an elastic coupling mechanism which constitutes a first exemplary embodiment of the watch mechanism comprising a star and a jumper spring of the invention. According to the present example, the coupling mechanism of the figure 3 is part of a time-setting device that allows you to advance, step by step, the hour hand of a timepiece, to the value of one hour at each step, without driving the minute hand. It will be understood that the figure 3 illustrates only the elastic coupling mechanism, the time-setting device therefore not being shown as a whole.

La figure 3 montre la roue des heures 65 d'une pièce d'horlogerie, une étoile à douze dents 67 qui est fixée concentriquement sur un second canon des heures (non représenté) faisant partie du dispositif de mise à l'heure, et enfin un ressort-sautoir 81 qui est porté par la planche de la roue des heures 65. Conformément à l'invention, le ressort-sautoir 81 comporte un élément rigide 83 présentant une proéminence 85 agencée pour coopérer avec l'étoile 67, et un unique bras élastique 87 qui est solidaire de l'élément rigide 83 par une de ses extrémités, et qui entoure partiellement l'étoile 67. On peut voir que, contrairement à ce qui était le cas notamment avec le ressort-sautoir de l'art antérieur illustré dans la figure 2, le ressort-sautoir 81 de la figure 3 ne constitue pas un anneau qui entourerait complètement l'étoile 67.The figure 3 shows the hours wheel 65 of a timepiece, a twelve-tooth star 67 which is fixed concentrically on a second hour barrel (not shown) forming part of the time-setting device, and finally a spring- jumper 81 which is carried by the plate of the hour wheel 65. According to the invention, the jumper spring 81 comprises a rigid element 83 having a protrusion 85 arranged to cooperate with the star 67, and a single elastic arm 87 which is integral with the rigid element 83 by one of its ends, and which partially surrounds the star 67. It can be seen that, unlike what was the case in particular with the jumper spring of the prior art illustrated in FIG. figure 2 , the spring-jumper 81 of the figure 3 does not constitute a ring which would completely surround the star 67.

Conformément à l'invention, le mécanisme élastique d'accouplement illustré dans la figure 3 comprend un support sur lequel le ressort-sautoir est monté, et des moyens de guidage constitués par une pluralité de coulisses rectilignes et parallèles, qui sont agencées pour permettre à l'élément rigide 83 d'être soulevé par une des dents de l'étoile 67 et de retomber ensuite entre deux dents de celle-ci. De plus, conformément à un mode de réalisation avantageux, les coulisses sont formées chacune d'une glissière et d'un coulisseau agencé pour coopérer avec la glissière. L'un des deux composants de chaque coulisse étant solidaire du support (constitué ici par la planche de la roue des heures 65) et l'autre composant étant solidaire de l'élément rigide 83. A titre d'exemple, l'élément rigide 83 du ressort-sautoir 81 représenté comporte deux glissières en forme d'oblongs (agencées parallèlement l'une de l'autre). On peut voir qu'une première glissière 89 est agencée proche de la proéminence 85, et que l'autre glissière 91 est agencée proche de la jonction entre la partie rigide 83 et l'extrémité proximale du bras élastique 87. De plus, deux goupilles (référencées 90 et 92), faisant office de coulisseau, font saillie à partir de la planche de la roue des heures 65. Les deux goupilles sont dimensionnées de manière à pouvoir être insérées chacune dans, et guidées par, une des deux glissières 89 et 91. On comprendra que les deux coulisses, constituées chacune d'une goupille et d'un oblong, forment ensemble des moyens de guidage qui, conformément à l'invention, permettent à l'élément rigide 83 de se déplacer en translation parallèlement à une direction déterminée relativement au support. On peut voir que les positions des deux glissières 89 et 91 sont échelonnées dans la direction déterminée. Cette caractéristique contribue à empêcher le ressort-sautoir 81 de pivoter. On peut voir également que, dans l'exemple illustré, la direction déterminée est parallèle au rayon de l'étoile 67 qui passe par le sommet de la proéminence 85.According to the invention, the elastic coupling mechanism illustrated in figure 3 comprises a support on which the jumper spring is mounted, and guide means constituted by a plurality of rectilinear and parallel slides, which are arranged to allow the rigid element 83 to be lifted by one of the teeth of the star 67 and then fall back between two teeth of the latter. In addition, in accordance with an advantageous embodiment, the slides are each formed of a slide and of a slide arranged to cooperate with the slide. One of the two components of each slide being integral with the support (here constituted by the plate of the hour wheel 65) and the other component being integral with the rigid element 83. By way of example, the rigid element 83 of the jumper spring 81 shown comprises two slideways in the form of oblongs (arranged parallel to each other). It can be seen that a first slide 89 is arranged close to the protrusion 85, and that the other slide 91 is arranged close to the junction between the rigid part 83 and the proximal end of the arm. elastic 87. In addition, two pins (referenced 90 and 92), acting as a slide, protrude from the plate of the hour wheel 65. The two pins are sized so that they can each be inserted into, and guided by, one of the two slides 89 and 91. It will be understood that the two slides, each consisting of a pin and an oblong, together form guide means which, in accordance with the invention, allow the rigid element 83 to move in translation parallel to a determined direction relative to the support. It can be seen that the positions of the two slides 89 and 91 are staggered in the determined direction. This feature helps prevent jump spring 81 from pivoting. It can also be seen that, in the example illustrated, the determined direction is parallel to the radius of the star 67 which passes through the top of the prominence 85.

En se référant toujours à la figure 3, on peut voir encore que l'extrémité distale du bras élastique 87 est en appui contre une goupille d'arrêt (référencée 95) qui fait saillie à partir de la planche de la roue des heures 65. Dans l'exemple illustré, la goupille d'arrêt 95 est positionnée de sorte que le rayon de l'étoile 67 qui passe par la goupille d'arrêt 95 fait un angle α avec le rayon de l'étoile qui passe par le sommet de la proéminence 85. Cet angle α est égal à 156°. On peut observer en outre que, telle que représentée, la proéminence 85 de l'élément rigide 83 se trouve en appui entre les pointes de deux dents consécutives de l'étoile 67. En effet, la goupille d'arrêt est agencée de manière à maintenir le bras élastique 87 écarté de sa position de repos, ce qui a pour effet de rappeler l'élément rigide 83 contre l'étoile 67. On comprendra donc que la goupille d'arrêt 95 joue le rôle d'une structure d'arrêt qui, conformément à l'invention, est agencée pour contraindre le ressort-sautoir 81 en retenant le bras élastique 87 écarté de sa position de repos. De préférence, l'angle α entre le rayon de l'étoile 67 qui passe par la goupille d'arrêt 95 et celui qui passe par le sommet de la proéminence 85 appartient à l'intervalle compris entre 150° et 210°. On a vu que dans le mode de réalisation qui fait l'objet du présent exemple, la direction déterminée selon laquelle l'élément rigide 83 du ressort-sautoir 81 est guidé en translation est parallèle au rayon de l'étoile 67 qui passe par le sommet de la proéminence 85. Dans ces conditions, la force de rappel dans la direction déterminée est toujours égale au double au moins de la force transversale. Cette caractéristique permet d'éviter que les coulisses ne se grippent.Always referring to the figure 3 , it can also be seen that the distal end of the elastic arm 87 bears against a stop pin (referenced 95) which projects from the plate of the hours wheel 65. In the example illustrated, the pin stopper 95 is positioned so that the radius of the star 67 which passes through the stop pin 95 makes an angle α with the radius of the star which passes through the apex of the prominence 85. This angle α is equal to 156 °. It can also be observed that, as shown, the protrusion 85 of the rigid element 83 rests between the points of two consecutive teeth of the star 67. In fact, the stop pin is arranged so as to keep the elastic arm 87 away from its rest position, which has the effect of recalling the rigid element 83 against the star 67. It will therefore be understood that the stop pin 95 acts as a stop structure which, according to the invention, is arranged to force the jump spring 81 by retaining the elastic arm 87 away from its rest position. Preferably, the angle α between the radius of the star 67 which passes through the stop pin 95 and that which passes through the top of the protrusion 85 belongs to the interval between 150 ° and 210 °. It has been seen that in the embodiment which is the subject of the present example, the determined direction in which the rigid element 83 of the spring-jumper 81 is guided in translation is parallel to the radius of the star 67 which passes through the top of the protrusion 85. Under these conditions, the return force in the determined direction is always equal to at least twice the transverse force . This feature prevents the slides from seizing up.

La figure 4 est une vue en plan d'un mécanisme élastique d'accouplement qui constitue un deuxième mode de réalisation exemplaire du mécanisme horloger comprenant une étoile et un ressort-sautoir de l'invention. La figure 4 montre la roue des heures 15 d'une pièce d'horlogerie, une étoile à douze dents 17 qui est fixée concentriquement sur un second canon des heures 19 faisant partie du dispositif de mise à l'heure, et enfin un ressort-sautoir 31 qui est porté par la planche de la roue des heures 15. Conformément à l'invention, le ressort-sautoir 31 comporte un élément rigide 33 présentant une proéminence 35 agencée pour coopérer avec l'étoile 17, et deux bras élastiques 37a, 37b solidaires de l'élément rigide 33 de part et d'autre de ce dernier et orientés de sorte qu'ils se rapprochent l'un de l'autre en direction de leurs extrémités distales respectives, ces dernières étant séparées l'une de l'autre par un espace. Comme on peut le voir, le ressort-sautoir 31 présente généralement la forme d'une bague qui entoure l'étoile 17, la bague étant ouverte au niveau de l'espace qui sépare les extrémités distales des deux lames élastiques courbes 37a, 37b. On peut voir de plus que, dans l'exemple illustré, les deux bras élastiques 37a, 37b on la forme de lames droites.The figure 4 is a plan view of an elastic coupling mechanism which constitutes a second exemplary embodiment of the watch mechanism comprising a star and a jumper spring of the invention. The figure 4 shows the hours wheel 15 of a timepiece, a star with twelve teeth 17 which is fixed concentrically on a second hour barrel 19 forming part of the time-setting device, and finally a jumper spring 31 which is carried by the plate of the hour wheel 15. According to the invention, the jumper spring 31 comprises a rigid element 33 having a protrusion 35 arranged to cooperate with the star 17, and two elastic arms 37a, 37b integral with the rigid element 33 on either side of the latter and oriented so that they approach each other in the direction of their respective distal ends, the latter being separated from one another by an area. As can be seen, the spring-jumper 31 generally has the shape of a ring which surrounds the star 17, the ring being open at the level of the space which separates the distal ends of the two curved elastic blades 37a, 37b. It can also be seen that, in the example illustrated, the two elastic arms 37a, 37b are in the form of straight blades.

En se référant toujours à la figure 4, on peut voir que, conformément au mode de réalisation qui fait l'objet du présent exemple, le mécanisme élastique d'accouplement, et en particulier son ressort-sautoir, sont symétriques par rapport à un axe qui passe par le sommet de la proéminence 35 de l'élément rigide 33, ainsi que par l'axe de rotation de l'étoile 17. On peut voir également que la proéminence 35 est formée par deux inclinés qui sont symétriques l'un de l'autre et qui se rejoignent en un sommet situé sur l'axe de symétrie. On peut noter en outre que les deux lames élastiques 37a et 37b sont également symétriques l'une de l'autre. L'élément rigide 33 du ressort-sautoir possède généralement la forme d'un secteur de couronne dont le bord intérieur présente en son milieu une bosse symétrique formée par la proéminence 35.Always referring to the figure 4 , it can be seen that, in accordance with the embodiment which is the subject of the present example, the elastic coupling mechanism, and in particular its jumper spring, are symmetrical with respect to an axis which passes through the top of the prominence 35 of the rigid element 33, as well as by the axis of rotation of the star 17. It can also be seen that the protrusion 35 is formed by two inclines which are symmetrical to each other and which meet in a vertex located on the axis of symmetry. It can also be noted that the two elastic strips 37a and 37b are also symmetrical to one another. The rigid element 33 of the spring-jumper generally has the shape of a sector crown, the inner edge of which has a symmetrical bump in its middle formed by the protrusion 35.

Conformément à l'invention, le mécanisme élastique d'accouplement illustré dans la figure 4 comprend un support sur lequel le ressort-sautoir est monté, et des moyens de guidage agencés pour permettre à l'élément rigide 33 d'être soulevé par une des dents de l'étoile 17 et de retomber ensuite entre deux dents de celle-ci. De plus, conformément à un mode de réalisation avantageux, les moyens de guidage sont constitués par une pluralité de coulisses, chacune de celles-ci étant formée d'une glissière et d'un coulisseau agencé pour coopérer avec la glissière, l'un de ces deux composants de la coulisse étant solidaire du support (constitué ici par la planche de la roue des heures 15) et l'autre composant étant solidaire de l'élément rigide. A titre d'exemple, l'élément rigide 33 du ressort-sautoir 31 représenté comporte trois glissières en forme d'oblongs (agencées parallèlement à l'axe de symétrie). Une première glissière 39 est agencée sur l'axe de symétrie, et les deux autres glissières 41a, 41b sont agencées symétriquement de part et d'autre sur l'élément rigide 33, à la jonction entre ce dernier et une des lames élastiques 37a ou 37b. De plus, trois goupilles (référencées 40, 42a et 42b), faisant office de coulisseau, font saillie à partir de la planche de la roue des heures 15. Les trois goupilles sont dimensionnées de manière à pouvoir être insérées chacune dans, et guidées par, une des trois glissières 39, 41a et 41b. On peut voir que les trois goupilles ne sont pas alignées, mais sont agencées aux trois sommets d'un triangle isocèle. La goupille 40 est insérée dans l'oblong 39 et les deux goupilles 42a et 42b sont respectivement insérées dans les oblongs 41a et 41b. On comprendra que les trois coulisses, constituées chacune d'une goupille et d'un oblong, forment ensemble des moyens de guidage qui, conformément à l'invention, permettent à l'élément rigide 33 de se déplacer en translation parallèlement à une direction déterminée relativement au support. On peut voir que dans l'exemple illustré, la direction déterminée correspond à la direction dans laquelle s'étend l'axe de symétrie du mécanisme élastique d'accouplement. De plus, comme le sommet de la proéminence 35 se trouve sur l'axe de symétrie, la proéminence est guidée en translation de manière à se déplacer sur l'axe de symétrie, et donc a fortiori sur une droite passant par l'axe de rotation de l'étoile 17. On comprendra en outre que du fait que les oblongs 39, 41a et 41b sont parallèles et que les trois goupilles 40, 42a et 42b ne sont pas alignées, le ressort-sautoir 31 est empêché de pivoter.According to the invention, the elastic coupling mechanism illustrated in figure 4 comprises a support on which the jumper spring is mounted, and guide means arranged to allow the rigid element 33 to be lifted by one of the teeth of the star 17 and then to fall back between two teeth of the latter . In addition, according to an advantageous embodiment, the guide means are constituted by a plurality of slides, each of these being formed of a slide and of a slide arranged to cooperate with the slide, one of them. these two components of the slide being integral with the support (here constituted by the plate of the hour wheel 15) and the other component being integral with the rigid element. By way of example, the rigid element 33 of the spring-jumper 31 shown comprises three slideways in the form of oblongs (arranged parallel to the axis of symmetry). A first slide 39 is arranged on the axis of symmetry, and the other two slideways 41a, 41b are arranged symmetrically on either side of the rigid element 33, at the junction between the latter and one of the elastic strips 37a or 37b. In addition, three pins (referenced 40, 42a and 42b), acting as a slide, protrude from the plate of the hour wheel 15. The three pins are sized so that they can each be inserted into, and guided by. , one of the three slides 39, 41a and 41b. We can see that the three pins are not aligned, but are arranged at the three vertices of an isosceles triangle. The pin 40 is inserted into the oblong 39 and the two pins 42a and 42b are respectively inserted into the oblongs 41a and 41b. It will be understood that the three slides, each consisting of a pin and an oblong, together form guide means which, in accordance with the invention, allow the rigid element 33 to move in translation parallel to a determined direction. relative to the support. It can be seen that in the example illustrated, the determined direction corresponds to the direction in which the axis of symmetry of the elastic coupling mechanism extends. Moreover, like the top of the prominence 35 is on the axis of symmetry, the prominence is guided in translation so as to move on the axis of symmetry, and therefore a fortiori on a line passing through the axis of rotation of the star 17 It will further be understood that because the oblongs 39, 41a and 41b are parallel and the three pins 40, 42a and 42b are not aligned, the jumper spring 31 is prevented from pivoting.

En se référant toujours à la figure 4, on peut voir encore que les extrémités distales des deux lames élastiques courbes 37a, 37b sont en appui contre deux goupilles d'arrêt (référencées 45 et 46) agencées symétriquement de part et d'autre de l'axe de symétrie du mécanisme d'accouplement. On peut observer en outre que, telle que représentée, la proéminence 35 de l'élément rigide 33 se trouve en appui entre les pointes de deux dents consécutives de l'étoile 17. En effet, les goupilles d'arrêt 45, 46 sont agencées de manière à maintenir les deux lames élastiques courbes 37a, 37b écartées de leur position de repos. Les deux goupilles d'arrêt 45, 46 jouent donc le rôle d'une structure d'arrêt qui, conformément à l'invention, est agencée pour contraindre le ressort-sautoir 31 en retenant les deux lames élastiques courbes 37a, 37b de façon que l'élément rigide 33 soit rappelé contre l'étoile 17. On remarquera de plus que les forces exercées par les deux goupilles d'arrêt 45, 46 sur les lames élastiques courbes 37a, 37b sont symétriques, de sorte que leur résultante est orientée parallèlement à l'axe de symétrie. On comprendra donc que la force résultante exercée par les goupilles d'arrêt 45, 46 sur le ressort-sautoir 31 est orientée dans la direction déterminée selon laquelle l'élément rigide 33 du ressort-sautoir 31 est guidé en translation.Always referring to the figure 4 , we can also see that the distal ends of the two curved elastic blades 37a, 37b bear against two stop pins (referenced 45 and 46) arranged symmetrically on either side of the axis of symmetry of the mechanism. coupling. It can also be observed that, as shown, the protrusion 35 of the rigid element 33 rests between the points of two consecutive teeth of the star 17. In fact, the stop pins 45, 46 are arranged so as to keep the two curved elastic blades 37a, 37b separated from their rest position. The two stop pins 45, 46 therefore play the role of a stop structure which, according to the invention, is arranged to force the jump spring 31 by retaining the two curved elastic leaves 37a, 37b so that the rigid element 33 is biased against the star 17. It will also be noted that the forces exerted by the two stop pins 45, 46 on the curved elastic leaves 37a, 37b are symmetrical, so that their resultant is oriented parallel to the axis of symmetry. It will therefore be understood that the resulting force exerted by the stop pins 45, 46 on the jump spring 31 is oriented in the determined direction in which the rigid element 33 of the jump spring 31 is guided in translation.

La figure 5 est une vue en plan d'un mécanisme élastique d'accouplement qui est conforme à un troisième mode de réalisation exemplaire du mécanisme horloger comprenant une étoile et un ressort-sautoir de l'invention. Le mécanisme élastique d'accouplement représenté dans la figure 5 est très semblable à celui de la figure 4. Les différences entre les deux modes de réalisation représentés se limitent à quelques caractéristiques du ressort-sautoir. Tout d'abord, les bras élastiques 137a et 137b du ressort-sautoir 131 de la figure 5 sont en forme de lames recourbées au lieu d'être en forme de lames droites. D'autre part, chacune des deux glissières 141a et 141b qui sont agencées symétriquement sur l'élément rigide 133, de part et d'autre de l'axe de symétrie, est formée d'une unique surface de guidage latéral contre laquelle l'une des deux goupilles 142a, 142b vient en appui. Les surfaces de guidage latéral illustrées dans la figure 5 sont des surfaces de guidage extérieures. On comprendra toutefois que, selon une variante, les glissières 141a et 141b pourraient être constituées par des surfaces de guidage intérieures.The figure 5 is a plan view of an elastic coupling mechanism which is in accordance with a third exemplary embodiment of the clockwork mechanism comprising a star and a jumper spring of the invention. The elastic coupling mechanism shown in figure 5 is very similar to that of the figure 4 . The differences between the two embodiments shown are limited to a few characteristics of the jumper spring. First of all, the elastic arms 137a and 137b of the jumper spring 131 of the figure 5 are in shape curved blades instead of straight blades. On the other hand, each of the two slides 141a and 141b which are arranged symmetrically on the rigid element 133, on either side of the axis of symmetry, is formed of a single lateral guide surface against which the one of the two pins 142a, 142b comes to rest. The side guide surfaces shown in the figure 5 are outer guide surfaces. It will be understood, however, that, according to a variant, the slides 141a and 141b could be constituted by internal guide surfaces.

La figure 6 est une vue en plan d'un mécanisme élastique d'accouplement qui est conforme à un quatrième mode de réalisation exemplaire du mécanisme horloger comprenant une étoile et un ressort-sautoir de l'invention. Le mécanisme élastique d'accouplement représenté dans la figure 6 est très semblable à ceux qui sont représentés dans les figures 4 et 5. Les différences entre les différents modes de réalisation représentés se limitent à quelques caractéristiques du ressort-sautoir. Tout d'abord, l'angle au centre qui sous tend l'élément rigide 233 en forme de secteur de couronne illustré dans la figure 6 est supérieur à 180 degrés, ce qui n'est pas le cas des éléments rigides 33 et 133 représentés dans les figures 4 et 5. D'autre part, les deux glissières 241a et 241b en forme d'oblongs ne sont pas agencées aux jonctions entre l'élément rigide 233 et les deux bras élastiques 237a et 237b. Comme on peut le voir dans la figure 6, les deux oblongs sont respectivement agencés sur deux appendices de l'élément rigide 233, et ces deux appendices s'étendent sensiblement parallèlement aux bras élastiques de sorte qu'ils prolongent l'élément rigide au-delà des jonctions de l'élément rigide 233 avec les deux bras élastiques 237a et 237b. Finalement, la glissière 239 qui est agencée sur l'axe de symétrie, est constituée par une fente entre deux lames flexibles parallèles (référencées respectivement 247 et 248). La largeur de la fente est légèrement inférieure au diamètre de la goupille 240 qui est insérée dans la fente. Ainsi, les deux lames flexibles 247 et 248 enserrent la goupille 240 qui a la possibilité de coulisser dans la fente sans aucun jeu latéral.The figure 6 is a plan view of an elastic coupling mechanism which is in accordance with a fourth exemplary embodiment of the clockwork mechanism comprising a star and a jumper spring of the invention. The elastic coupling mechanism shown in figure 6 is very similar to those represented in the figures 4 and 5 . The differences between the different embodiments shown are limited to a few characteristics of the jumper spring. First of all, the angle at the center which underlies the rigid element 233 in the form of a crown sector illustrated in figure 6 is greater than 180 degrees, which is not the case with the rigid elements 33 and 133 shown in the figures 4 and 5 . On the other hand, the two slideways 241a and 241b in the form of oblongs are not arranged at the junctions between the rigid element 233 and the two elastic arms 237a and 237b. As can be seen in the figure 6 , the two oblongs are respectively arranged on two appendages of the rigid element 233, and these two appendages extend substantially parallel to the elastic arms so that they extend the rigid element beyond the junctions of the rigid element 233 with the two elastic arms 237a and 237b. Finally, the slide 239 which is arranged on the axis of symmetry, is constituted by a slot between two parallel flexible blades (respectively referenced 247 and 248). The width of the slot is slightly less than the diameter of the pin 240 which is inserted into the slot. Thus, the two flexible blades 247 and 248 grip the pin 240 which has the possibility of sliding in the slot without any lateral play.

La figure 7 est une vue en plan d'un mécanisme élastique d'accouplement qui est conforme à un cinquième mode de réalisation exemplaire du mécanisme horloger comprenant une étoile et un ressort-sautoir de l'invention. Le mécanisme élastique d'accouplement représenté dans la figure 7 est particulièrement semblable à celui de la figure 6. Les différences entre les deux modes de réalisation se limitent à quelques caractéristiques du ressort-sautoir. Tout d'abord, le ressort-sautoir 331 illustré dans la figure 7 comporte deux petits sautoirs auxiliaires (référencés respectivement 351 et 352) qui sont agencés pour servir de freins de façon à atténuer l'accélération angulaire provoquée par le sautoir 331 lorsqu'il chute entre deux dents de l'étoiles 317. D'autre part, les deux lames flexibles 347 et 348 de la glissière 339 agencée sur l'axe de symétrie de l'élément rigide 333 sont solidaires de ce dernier par leurs deux extrémités, au lieu d'une seule comme c'est le cas avec les lames flexibles 247 et 248 représentées dans la figure 6. On comprendra que la glissière 339 permet également d'obtenir un guidage sans jeu latéral.The figure 7 is a plan view of an elastic coupling mechanism which is in accordance with a fifth exemplary embodiment of the clockwork mechanism comprising a star and a jumper spring of the invention. The elastic coupling mechanism shown in figure 7 is particularly similar to that of the figure 6 . The differences between the two embodiments are limited to a few characteristics of the jumper spring. First, the jumper spring 331 shown in figure 7 comprises two small auxiliary jumpers (referenced respectively 351 and 352) which are arranged to act as brakes so as to attenuate the angular acceleration caused by the jumper 331 when it falls between two teeth of the star 317. On the other hand, the two flexible blades 347 and 348 of the slideway 339 arranged on the axis of symmetry of the rigid element 333 are secured to the latter by their two ends, instead of just one as is the case with flexible blades 247 and 248 represented in the figure 6 . It will be understood that the slide 339 also makes it possible to obtain guidance without lateral play.

On comprendra en outre que diverses modifications et/ou améliorations évidentes pour un homme du métier peuvent être apportées aux modes de réalisation qui font l'objet de la présente description sans sortir du cadre de la présente invention définie par les revendications annexées. En particulier, le ressort-sautoir d'un mécanisme horloger conforme à l'invention n'est pas forcément symétrique. Dans les mécanismes horlogers fonctionnant dans un seul sens de rotation, notamment, la proéminence agencée pour coopérer avec l'étoile pourrait ne pas être symétrique. De plus, la direction parallèlement à laquelle l'élément rigide se déplace en translation pourrait ne pas non plus être déterminée de telle sorte que la proéminence se déplace sur une droite passant par l'axe de rotation de l'étoile. Finalement, on comprendra que le mécanisme horloger de l'invention ne se limite pas aux variantes dans lesquelles l'étoile est munie de dents triangulaires. En effet, toute roue dentée dont les dents conviennent pour coopérer avec un sautoir peut être utilisée comme étoile.It will also be understood that various modifications and / or improvements obvious to a person skilled in the art can be made to the embodiments which are the subject of the present description without departing from the scope of the present invention defined by the appended claims. In particular, the jumper spring of a watch mechanism according to the invention is not necessarily symmetrical. In watch mechanisms operating in a single direction of rotation, in particular, the prominence arranged to cooperate with the star could not be symmetrical. In addition, the direction parallel to which the rigid element moves in translation could also not be determined so that the prominence moves on a line passing through the axis of rotation of the star. Finally, it will be understood that the horological mechanism of the invention is not limited to the variants in which the star is provided with triangular teeth. Indeed, any toothed wheel whose teeth are suitable for cooperating with a jumper can be used as a star.

Claims (13)

  1. Timepiece mechanism comprising a star and a jumper spring comprising a rigid element (33; 83; 133; 233; 333) having a protrusion (35; 85) arranged to cooperate with the star, and at least one elastic portion (37a, 37b; 87; 137a, 137b; 237a, 237b; 337a, 337b) arranged to surround the star (17; 67; 117; 217; 317) at least partially, further comprising a support (15; 65; 115) on which the jumper spring (31; 81; 131; 231; 331) is movably mounted, the support comprising a bearing structure arranged to constrain the jumper spring by retaining the at least one elastic portion so that the rigid element is biased against the star, and comprising guide means arranged to allow the rigid element (33; 83; 133; 233; 333) to be raised by one of the teeth of the star (17; 67; 117; 217; 317) and then to fall between two teeth thereof; characterised in that said at least one elastic portion is formed by an elastic arm (37a, 37b; 87; 137a, 137b; 237a, 237b; 337a, 337b) fixedly attached to the rigid element (33; 83; 133; 233; 333) by one of its ends, named proximal end, in that the bearing structure comprises at least one stop (45, 46; 95) against which the distal end of the elastic arm (37a, 37b; 87; 137a, 137b; 237a, 237b; 337a, 337b) comes to bear, and in that the guide means are formed by a plurality of straight and parallel slides (39, 40, 41a, 41b; 89, 90, 91, 92; 141a, 141b, 142a, 142b; 239, 240, 241a, 241b; 339, 340) which are arranged to allow the rigid element (33; 83; 133; 233; 333) to be displaced in translation parallel to a specified direction relative to the support (15).
  2. Timepiece mechanism as claimed in claim 1, characterised in that the jumper spring (3) comprises two elastic portions (37a, 37b; 137a, 137b; 237a, 237b; 337a, 337b), in that said elastic portions are formed by two elastic arms fixedly attached to the rigid element (33; 133; 233; 333), on both sides thereof, by their proximal end, the two elastic arms being orientated so that they move towards each other in the direction of their distal end, the distal ends of the two elastic arms (37a, 37b; 137a, 137b; 237a, 237b; 337a, 337b) being separated from each other by a space, and in that the bearing structure comprises two stops (45, 46) against which the distal ends of the two elastic arms come to bear respectively.
  3. Timepiece mechanism as claimed in claim 1 or 2, characterised in that the slides are each formed by a slide-way (39, 41a, 41b; 89, 91; 141a, 141b; 239, 241a, 241b; 339) and slide-bar (40, 42a, 42b; 90, 92; 142a, 142b; 240; 340) arranged to cooperate with the slide-way, one of the slide-way and the slide-bar being fixedly attached to the support, while the other is fixedly attached to the rigid element of the jumper spring.
  4. Timepiece mechanism as claimed in claim 3, characterised in that the slide-ways (39, 41a, 41b; 89, 91; 141a, 141b; 239, 241a, 241b; 339) are formed in the rigid element of the jumper spring and in that the slide-bars are formed by pins (40, 42a, 42b; 90, 92; 142a, 142b; 240; 340) projecting from the support (15; 65; 115).
  5. Timepiece mechanism as claimed in claim 3 or 4, characterised in that at least one of the slide-ways is formed by an oblong.
  6. Timepiece mechanism as claimed in any one of claims 3, 4 and 5, characterised in that the guide means comprise three slides respectively formed of three slide-ways (39, 41a, 41b; 141a, 141b; 239, 241a, 241b; 339) orientated in the specified direction and of three pins (40, 42a, 42b; 142a, 142b; 240; 340), the pins being arranged on the support (15; 115) at the three points of a non-degenerate triangle.
  7. Timepiece mechanism as claimed in any one of the preceding claims, characterised in that the direction of the displacement of the rigid element (33; 83; 133; 233; 333) in translation is specified so that the guide means keep the protrusion (35; 85) on a straight line passing through the axis of rotation of the star (17; 67; 117; 217; 317).
  8. Timepiece mechanism as claimed in claim 6, characterised in that one (39) of the three slides (39, 41a, 41b) is arranged so that its axis coincides with a radius of the star (17), and in that the two other slides (41a, 41b) are arranged symmetrically on both sides of the radius of the star.
  9. Timepiece mechanism as claimed in claim 8, characterised in that the slide-ways (141a and 141b) of the two other slides which are arranged symmetrically on the rigid element (133) on both sides of the radius of the star (117), are each formed by a single lateral guide surface against which the pin (142a or 142b) of the slide is arranged to bear.
  10. Timepiece mechanism as claimed in claim 8 or 9, characterised in that the slide-way (239) arranged on the axis of symmetry is formed by a slot between two parallel flexibles strips (247, 248), the slot having a width slightly less than the diameter of the pin (240) arranged to be inserted into the slot.
  11. Timepiece mechanism as claimed in any one of the preceding claims, characterised in that the protrusion (35) of the rigid element (33) of the jumper spring (31) comprises two slopes separated by a peak, the slopes being arranged symmetrically with respect to a radius of the star (17), said radius being orientated parallel to the specified direction and passing through the peak.
  12. Timepiece mechanism as claimed in any one of the preceding claims, characterised in that the shape of the jumper spring (31) is generally planar.
  13. Timepiece mechanism as claimed in any one of the preceding claims, characterised in that the jumper spring (31) is symmetrical with respect to a radius of the star (17), said radius being orientated parallel to the specified direction so that an immobilising torque generated by the jumper spring (31) is the same when the star (17) is actuated in one direction and the other.
EP18205271.2A 2018-11-08 2018-11-08 Timepiece mechanism comprising a star and a jumper spring Active EP3650953B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP18205271.2A EP3650953B1 (en) 2018-11-08 2018-11-08 Timepiece mechanism comprising a star and a jumper spring

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18205271.2A EP3650953B1 (en) 2018-11-08 2018-11-08 Timepiece mechanism comprising a star and a jumper spring

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EP3650953A1 EP3650953A1 (en) 2020-05-13
EP3650953B1 true EP3650953B1 (en) 2021-12-15

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EP18205271.2A Active EP3650953B1 (en) 2018-11-08 2018-11-08 Timepiece mechanism comprising a star and a jumper spring

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Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH590510B5 (en) 1975-04-10 1977-08-15 Ebauches Sa
EP1396765B1 (en) * 2002-09-03 2006-11-22 Frédéric Piguet S.A. Time zone timepiece comprising an alarm mechanism
JP2004184259A (en) * 2002-12-04 2004-07-02 Seiko Instruments Inc Clock with calendar mechanism
JP4917909B2 (en) * 2007-02-15 2012-04-18 セイコーインスツル株式会社 Jumper structure, calendar mechanism provided with the same, and watch with calendar mechanism

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EP3650953A1 (en) 2020-05-13

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