EP3650953A1 - Timepiece mechanism comprising a star and a jumper spring - Google Patents
Timepiece mechanism comprising a star and a jumper spring Download PDFInfo
- Publication number
- EP3650953A1 EP3650953A1 EP18205271.2A EP18205271A EP3650953A1 EP 3650953 A1 EP3650953 A1 EP 3650953A1 EP 18205271 A EP18205271 A EP 18205271A EP 3650953 A1 EP3650953 A1 EP 3650953A1
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- European Patent Office
- Prior art keywords
- star
- rigid element
- jumper spring
- mechanism according
- slides
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- 230000007246 mechanism Effects 0.000 title claims abstract description 70
- 238000013519 translation Methods 0.000 claims abstract description 11
- 230000003100 immobilizing effect Effects 0.000 claims 1
- 230000008878 coupling Effects 0.000 description 30
- 238000010168 coupling process Methods 0.000 description 30
- 238000005859 coupling reaction Methods 0.000 description 30
- 230000014616 translation Effects 0.000 description 8
- 230000008901 benefit Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
Images
Classifications
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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
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- G—PHYSICS
- G04—HOROLOGY
- G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
- G04B19/00—Indicating the time by visual means
- G04B19/02—Back-gearing arrangements between gear train and hands
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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
- 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 timepiece mechanism comprising a star and a jumper spring biased against the star, the jumper spring comprising a rigid element having a prominence arranged to cooperate with the star, and at least one elastic portion which is arranged to surround the star at least partially, the timepiece mechanism further comprising a support on which the jumper spring is movably mounted, the support comprising a support structure arranged to tension the jumper spring 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 to fall between two teeth of 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 activated, the teeth raise the jumper which then falls between two other teeth. A jumper generally allows the movement of the star in both directions.
- a known application of the mechanisms comprising a star and a jumper brought up against the star by a spring is that of the 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, 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 it changes from one time zone to another during a travel.
- a timepiece allowing the correction of the time zone can for example comprise a minute hand carried by a carriageway driven in rotation by movement, and an hour wheel (or cannon wheel) driven by the pavement via a cog timer.
- 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 cannon 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 still 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 / declutch function and selective indexing of the hour hand in twelve angular positions regularly spaced from each other on the hour tower.
- the hour wheel does not, in principle, carry the hour hand. It is worth pointing out, however, that other known timepieces have two hour hands. A conventional hour hand is traditionally carried by the hour wheel, and an additional hour hand is carried by the second barrel.
- FIGs 1 and 2 are top plan views of two elastic coupling mechanisms of the prior art, which each comprise a star and a jumper returned against the star by a spring.
- a star and a jumper returned against the star by a spring.
- the known elastic coupling mechanism which is illustrated in the figure 1 , usually gives satisfaction.
- the parts of the mechanism are very fine, if the torque that the coupling mechanism must overcome to cause the display of the timepiece is large, the mechanism of the figure 1 can cause difficulties, especially during assembly.
- the known elastic coupling mechanism which is shown in the figure 2 is taken from the patent document FR 2 307 301 . It also complies with the definition given in the preamble to this patent application.
- an hour wheel 4 whose board carries a circular rim 3 arranged concentrically with the hour wheel, a twelve-tooth star 7 fixed concentrically on a second hour cannon 5, and a jumper spring 8 arranged on the plate of the hour wheel 4, inside the rim 3.
- the jumper spring 8 is fixed to the board of the hour wheel by a pin 9. It can also be seen that the jumper spring 8 is of annular shape and that it surrounds the star 7.
- the jumper spring 8 is fixed on the board of the hour wheel 4 inside the rim 3 by the pin 9.
- the association of the pin 9 and the rim 3 constitutes guide means preventing the jumper spring 8 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 between two teeth of the latter.
- the pin 9 also acts as a support structure allowing the jumper spring 8 to be tensioned, so that the rigid element 11 is brought back against the star 7.
- an advantage of that of figure 2 is that it eliminates the need for two components to be energized with each other. This difference is likely to facilitate the assembly of the mechanism.
- the mechanism of the figure 2 However, there are also some faults. Indeed, the production of an hour wheel 4 which carries on its board a circular rim 3 involves relatively complex machining or termination operations. In addition, the presence of the rim 3 has the effect of considerably increasing the thickness of the hour wheel 4. Finally, it will be understood that the circular rim does not completely prevent the jumper spring 8 from pivoting at a certain angle around the pin 9 when the star 7 is actuated and that 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 the hour hand.
- An object of the present invention is to remedy the drawbacks of the prior art which have just been explained.
- the present invention achieves this and other objects by providing a timepiece mechanism which includes a star and a jumper spring and which is in accordance with claim 1 appended.
- the guide means which allow the rigid element to be lifted by one of the teeth of the star and then fall between two teeth of the latter are constituted by at least two straight 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 integral with 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 bears. It will be understood that putting the jumper spring under tension by means of a stop, against which the elastic arm simply comes to bear, considerably facilitates the assembly of the mechanism 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 from each other towards their respective distal ends, the latter being separated from each other by a space.
- the support structure comprises two stops against which respectively bear the distal ends of the two elastic arms.
- the figure 3 is a plan view of an elastic coupling mechanism which constitutes a first exemplary embodiment of the timepiece 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 which allows to advance, step by step, the hour hand of a timepiece, 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 hour wheel 65 of a timepiece, a twelve-tooth star 67 which is fixed concentrically on a second hour cannon (not shown) forming part of the time-setting device, and finally a spring- jumper 81 which is carried by the plank of the hour wheel 65.
- the jumper spring 81 comprises a rigid element 83 having a prominence 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, contrary to what was the case in particular with the jumper spring of the prior art illustrated in the figure 2 , the jumper spring 81 of the figure 3 does not constitute a ring which would completely surround the star 67.
- the elastic coupling mechanism illustrated in the 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 thereof.
- the slides are each formed by a slide and a slide arranged to cooperate with the slide.
- One of the two components of each slide being secured to the support (here constituted by the plank of the hour wheel 65) and the other component being secured to the rigid element 83.
- the rigid element 83 of the jumper spring 81 shown has two oblong-shaped slides (arranged parallel to one another).
- a first slide 89 is arranged close to the prominence 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 plank of the hour wheel 65. The two pins are dimensioned 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, according to the invention, allow the rigid element 83 to move in translation parallel to a determined direction relative to the support.
- the positions of the two slides 89 and 91 are staggered in the determined direction. This feature helps prevent the jumper spring 81 from pivoting.
- the determined direction is parallel to the radius of the star 67 which passes through the apex of the prominence 85.
- the distal end of the elastic arm 87 is in abutment against a stop pin (referenced 95) which projects from the plank of the hour wheel 65.
- the pin stop 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 °. It can also be observed that, as shown, the prominence 85 of the rigid element 83 is in contact 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 bringing the rigid element 83 against the star 67.
- the stop pin 95 plays the role of a stop structure which, according to the invention, is arranged to constrain the jumper spring 81 by retaining the elastic arm 87 spaced 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 apex of the prominence 85 belongs to the interval between 150 ° and 210 °.
- the restoring force in the determined direction is always at least twice the transverse force . This characteristic makes it possible to prevent 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 timepiece mechanism comprising a star and a jumper spring of the invention.
- the figure 4 shows the hour wheel 15 of a timepiece, a twelve-tooth star 17 which is fixed concentrically on a second hour cannon 19 forming part of the time-setting device, and finally a jumper spring 31 which is carried by the plank of the hour wheel 15.
- the jumper spring 31 comprises a rigid element 33 having a prominence 35 arranged to cooperate with the star 17, and two elastic arms 37a, 37b secured to 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 jumper spring 31 generally has the form 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 apex of the prominence 35 of the rigid element 33, as well as by the axis of rotation of the star 17.
- the prominence 35 is formed by two inclines which are symmetrical to one another and which join in a vertex located on the axis of symmetry.
- the two elastic blades 37a and 37b are also symmetrical to one another.
- the rigid element 33 of the jumper spring generally has the shape of a sector crown whose inner edge has in its middle a symmetrical hump formed by the prominence 35.
- the elastic coupling mechanism illustrated in the 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 between two teeth of the latter .
- the guide means are constituted by a plurality of slides, each of these being formed by a slide and a slide arranged to cooperate with the slide, one of these two components of the slide being secured to the support (here constituted by the plank of the hour wheel 15) and the other component being secured to the rigid element.
- the rigid element 33 of the jumper spring 31 shown has three oblong-shaped slides (arranged parallel to the axis of symmetry).
- a first slide 39 is arranged on the axis of symmetry, and the other two slides 41a, 41b are arranged symmetrically on either side on the rigid element 33, at the junction between the latter and one of the elastic blades 37a or 37b.
- three pins (referenced 40, 42a and 42b), acting as a slide, protrude from the board of the hour wheel 15.
- the three pins are dimensioned so that they can each be inserted in, 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 straight line passing through the axis of rotation of the star 17 It will also be understood that because the oblongs 39, 41a and 41b are parallel and that 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 constrain the jumper spring 31 by retaining the two curved elastic blades 37a, 37b so that the rigid element 33 is biased against the star 17. It will further be noted that the forces exerted by the two stop pins 45, 46 on the curved elastic blades 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 jumper spring 31 is oriented in the determined direction in which the rigid element 33 of the jumper spring 31 is guided in translation.
- the figure 5 is a plan view of an elastic coupling mechanism which conforms to a third exemplary embodiment of the timepiece mechanism comprising a star and a jumper spring of the invention.
- the elastic coupling mechanism shown in the 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 fit curved blades instead of being shaped like 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 bear.
- the lateral guide surfaces shown in the figure 5 are exterior guide surfaces. It will however be understood that, according to a variant, the slides 141a and 141b could be constituted by interior guide surfaces.
- the figure 6 is a plan view of an elastic coupling mechanism which conforms to a fourth exemplary embodiment of the timepiece mechanism comprising a star and a jumper spring of the invention.
- the elastic coupling mechanism shown in the 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 central angle which underlies the rigid element 233 in the form of a crown sector illustrated in the figure 6 is greater than 180 degrees, which is not the case for rigid elements 33 and 133 shown in the figures 4 and 5 .
- the two slides 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 (referenced respectively 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 enclose 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 conforms to a fifth exemplary embodiment of the timepiece mechanism comprising a star and a jumper spring of the invention.
- the elastic coupling mechanism shown in the 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 illustrated in the figure 7 comprises two small auxiliary necklaces (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 stars 317.
- the two flexible blades 347 and 348 of the slide 339 arranged on the axis of symmetry of the rigid element 333 are integral with the latter by their two ends, instead of one as is the case with the 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 timepiece mechanism according to the invention is not necessarily symmetrical.
- the prominence arranged to cooperate with the star may 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 straight line passing through the axis of rotation of the star.
- the timepiece mechanism of the invention is not limited to the variants in which the star is provided with triangular teeth. In fact, any toothed wheel whose teeth are suitable for cooperating with a jumper can be used as a star.
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- General Physics & Mathematics (AREA)
- Electromechanical Clocks (AREA)
Abstract
Le mécanisme horloger comprend une étoile (17) et un ressort-sautoir (31) comportant un élément rigide (33) présentant une proéminence (35) agencée pour coopérer avec l'étoile, et au moins un bras élastiques (37a, 37b) solidaire de l'élément rigide par une de ses extrémités et agencé de manière à entourer au moins partiellement l'étoile (17), le ressort-sautoir (31) étant monté sur un support (15), et le dispositif comprenant encore des moyens de guidage (39, 40, 41a, 42a, 41b, 42b) agencés de manière à permettre à l'élément rigide (33) de se déplacer en translation parallèlement à une direction déterminée relativement au support lorsque l'élément rigide est soulevé par une des dents de l'étoile et qu'il retombe ensuite entre deux dents de celle-ci, le support (15) présentant encore au moins un arrêt (45, 46) agencé pour contraindre le ressort-sautoir en retenant l'extrémités distale du dit au moins un bras élastiques (37a, 37b), de façon à ce que l'élément rigide (33) soit rappelé contre l'étoile (17).The watch mechanism comprises a star (17) and a jumper spring (31) comprising a rigid element (33) having a protrusion (35) arranged to cooperate with the star, and at least one elastic arm (37a, 37b) integral of the rigid element by one of its ends and arranged so as to at least partially surround the star (17), the jumper spring (31) being mounted on a support (15), and the device further comprising means for guide (39, 40, 41a, 42a, 41b, 42b) arranged so as to allow the rigid element (33) to move in translation parallel to a determined direction relative to the support when the rigid element is lifted by one of the teeth of the star and then it falls between two teeth thereof, the support (15) still having at least one stop (45, 46) arranged to constrain the jumper spring by retaining the distal ends of said at least one elastic arm (37a, 37b), so that that the rigid element (33) is biased against the star (17).
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 timepiece mechanism comprising a star and a jumper spring biased against the star, the jumper spring comprising a rigid element having a prominence arranged to cooperate with the star, and at least one elastic portion which is arranged to surround the star at least partially, the timepiece mechanism further comprising a support on which the jumper spring is movably mounted, the support comprising a support structure arranged to tension the jumper spring 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 to fall between two teeth of this one.
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 many watchmaking mechanisms including 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 activated, the teeth raise the jumper which then falls between two other teeth. A jumper generally allows the movement of the star 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 the mechanisms comprising a star and a jumper brought up against the star by a spring is that of the 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, 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 it changes 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 allowing the correction of the time zone, as indicated above, can for example comprise a minute hand carried by a carriageway driven in rotation by movement, and an hour wheel (or cannon wheel) driven by the pavement via a cog timer. 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 cannon 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 still 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 / declutch function and selective indexing of the hour hand in twelve angular positions regularly spaced from each other on the hour tower.
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 known timepieces have two hour hands. A conventional hour hand is traditionally carried by the hour wheel, and an additional hour hand is carried by the second barrel.
Les
Le mécanisme élastique d'accouplement connu qui est représenté dans la
En comparaison avec le mécanisme d'accouplement de la
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 object of the present invention is to remedy the drawbacks of the prior art which have just been explained. The present invention achieves this and other objects by providing a timepiece mechanism which includes a star and a jumper spring and which is in accordance with claim 1 appended.
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 fall between two teeth of the latter are constituted by at least two straight 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 because the displacements of the prominence, when it is lifted by one of the teeth of the star and when it then falls between two teeth thereof, are limited to translations, the indexing of the star can be achieved 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 integral with 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 bears. It will be understood that putting the jumper spring under tension by means of a stop, against which the elastic arm simply comes to bear, 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.In accordance with 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 from each 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 close partially around the star. In addition, according to this particular embodiment, the support structure comprises two stops against which respectively bear the distal ends of the two elastic arms. 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 which the slides undergo.
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.
- 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 timepiece 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 timepiece 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 timepiece 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 timepiece 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 timepiece mechanism comprising a star and a jumper spring of the invention.
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
La
Conformément à l'invention, le mécanisme élastique d'accouplement illustré dans la
En se référant toujours à la
La
En se référant toujours à la
Conformément à l'invention, le mécanisme élastique d'accouplement illustré dans la
En se référant toujours à la
La
La
La
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 further be understood that various modifications and / or improvements obvious to a person skilled in the art can be made to the embodiments which are the subject of the present description without departing from the scope of the present invention defined by the appended claims. In particular, the jumper spring of a timepiece mechanism according to the invention is not necessarily symmetrical. In watchmaking mechanisms operating in a single direction of rotation, in particular, the prominence arranged to cooperate with the star may 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 straight line passing through the axis of rotation of the star. Finally, it will be understood that the timepiece mechanism of the invention is not limited to the variants in which the star is provided with triangular teeth. In fact, any toothed wheel whose teeth are suitable for cooperating with a jumper can be used as a star.
Claims (13)
Priority Applications (1)
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EP18205271.2A EP3650953B1 (en) | 2018-11-08 | 2018-11-08 | Timepiece mechanism comprising a star and a jumper spring |
Applications Claiming Priority (1)
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EP18205271.2A EP3650953B1 (en) | 2018-11-08 | 2018-11-08 | Timepiece mechanism comprising a star and a jumper spring |
Publications (2)
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EP3650953A1 true EP3650953A1 (en) | 2020-05-13 |
EP3650953B1 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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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2307301A1 (en) | 1975-04-10 | 1976-11-05 | Ebauches Sa | WATCH-MAKING PART INCLUDING A MANUALLY ACTIONABLE HOURS INDICATOR BODY INDEPENDENT OF THE MINUTES INDICATOR |
EP1396765A1 (en) * | 2002-09-03 | 2004-03-10 | 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 |
JP2008197036A (en) * | 2007-02-15 | 2008-08-28 | Seiko Instruments Inc | Jumper structure, calendar mechanism provided therewith, and timepiece with calendar mechanism |
-
2018
- 2018-11-08 EP EP18205271.2A patent/EP3650953B1/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2307301A1 (en) | 1975-04-10 | 1976-11-05 | Ebauches Sa | WATCH-MAKING PART INCLUDING A MANUALLY ACTIONABLE HOURS INDICATOR BODY INDEPENDENT OF THE MINUTES INDICATOR |
EP1396765A1 (en) * | 2002-09-03 | 2004-03-10 | 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 |
JP2008197036A (en) * | 2007-02-15 | 2008-08-28 | Seiko Instruments Inc | Jumper structure, calendar mechanism provided therewith, and timepiece with calendar mechanism |
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