EP4413426A1 - Mécanisme de mise à l'heure pour pièce d'horlogerie - Google Patents
Mécanisme de mise à l'heure pour pièce d'horlogerieInfo
- Publication number
- EP4413426A1 EP4413426A1 EP22789318.7A EP22789318A EP4413426A1 EP 4413426 A1 EP4413426 A1 EP 4413426A1 EP 22789318 A EP22789318 A EP 22789318A EP 4413426 A1 EP4413426 A1 EP 4413426A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- elastic bar
- rod
- time
- coupling element
- control rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G04—HOROLOGY
- G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
- G04B27/00—Mechanical devices for setting the time indicating means
- G04B27/02—Mechanical devices for setting the time indicating means by making use of the winding means
- G04B27/04—Mechanical devices for setting the time indicating means by making use of the winding means with clutch wheel
-
- 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
- G04B3/00—Normal winding of clockworks by hand or mechanically; Winding up several mainsprings or driving weights simultaneously
- G04B3/04—Rigidly-mounted keys, knobs or crowns
- G04B3/046—Operation by rotation and axial movement with extra function of axial shift of operating element, e.g. crown combined with push button
Definitions
- the present invention relates to a time-setting mechanism for a timepiece comprising a control stem that can be maneuvered in rotation and in translation from the outside of the timepiece and able to take at least two predefined axial positions respectively called “ neutral position” and “active position”, a sliding pinion arranged coaxially with the rod so as to be free to move by sliding along the latter while being integral in rotation, and a relay device arranged to make it possible to control the position of the sliding pinion by maneuvering the stem in translation, the relay device being arranged so that the sliding pinion is in a first axial position in which it meshes with a time-setting gear when the stem is in the active position , and that it is in a second axial position in which it is disengaged from the time-setting reference when the stem is in the neutral position.
- FIG. 1 illustrates such a mechanism which is known from the prior art.
- This mechanism comprises a winding/time-setting stem 1 and a sliding pinion 3 arranged to be guided coaxially by the stem so as to be free to slide along the latter while being integral with it in rotation.
- the rod 1 and the sliding pinion 3 are slaved to each other by means of a relay device comprising a pull rod 5 connected to the rod, and a rocker 7 connected to the sliding pinion 3.
- the mechanism also includes a winding pinion 9 which is loosely mounted on the rod 1 in the axis of the sliding pinion 3.
- a first end of the sliding pinion is provided with a Breguet toothing provided to cooperate, in the neutral position of the rod 1, with a corresponding Breguet toothing of the pinion winding crown 9.
- the second end of the sliding pinion comprises an edge toothing provided for, in the active position of the stem, to come into engagement with an intermediate transmission 11 .
- Figure 1 illustrates the time-setting mechanism in the configuration allowing winding (stem 1 being pushed back into the neutral position).
- pull rod 5 is immobilized by a positioning spring (called pull rod spring and referenced 6), while sliding pinion 3 is biased rearward (to the right in the drawing) by the rocker 7 and its spring 8, so that the Breguet toothing of the sliding pinion 3 cooperates with that of the winding pinion 9, and that the other end of the sliding pinion is kept away from the intermediate transmission 11.
- the sliding pinion 3 transmits the rotation of the stem 1 to the winding pinion 9, while the intermediate transmission 11 is disengaged from the stem.
- the pull rod 5 When the rod 1 is pulled so as to bring it into the active position, the pull rod 5 is pivoted (clockwise in the drawing) by lifting the pull rod spring 6. Due to the shape of the rocker profile 7, the pivoting of the pull rod causes the pivoting of the rocker counterclockwise against the rocker spring 8. By pivoting, the rocker 7 pushes the sliding pinion 3 forwards (towards the left in the drawing) . The edge toothing of the sliding pinion 3 thus comes into engagement with the intermediate transmission 11, while the winding pinion 9 is disengaged from the sliding pinion. It will be noted that the shape of the pull tab spring 6 also makes it possible to immobilize the pull tab in this second position.
- the relay device intended to slave the movements of the sliding pinion 3 to the movements of the rod 1 comprises the pull rod 5, the pull rod spring 6, the rocker 7 and the Rocker 8. Pull-bar 5 and rocker 7 must also be pivoted individually on the plate. Referring again to FIG. 1, it can be seen that the relay device in fact occupies most of the space devoted to the time-setting mechanism as a whole. It would therefore be useful to have a time-setting mechanism in which the relay device intended to slave the sliding pinion to the stem is less bulky or at the very least comprises fewer component parts.
- 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 time-setting mechanism which is in accordance with appended claim 1.
- the relay device which is arranged to make it possible to control the position of the sliding pinion by maneuvering the control rod, comprises an elastic bar that is deformable in bending and two connecting structures arranged respectively to hold the two ends of the bar elastic.
- an intermediate part of the elastic bar is inserted into an annular groove that the sliding pinion has, so that the axial position of the latter is linked to that of the intermediate part of the elastic bar.
- the relay device comprises a coupling element arranged to cooperate with one of the connecting structures or with the elastic bar so that, when the control rod passes from the neutral position to the active position or vice versa, the element coupling moves by bending the elastic bar, so that the sliding pinion is caused to slide along the rod.
- the relay device thus makes it possible to associate the active position of the rod with a first axial position of the sliding pinion in which it meshes with a time-setting gear, and to associate the neutral position of the stem with a second axial position of the sliding pinion in which it is disengaged from the time-setting gear.
- the relay device comprises a pull tab comprising an arm arranged to cooperate with the rod, the pull tab comprising the coupling element.
- the two connecting structures are arranged to make it possible to maintain, between the two ends of the elastic bar, a distance such that the elastic bar is kept buckled in a predefined deformation plane.
- the undeformed length of the elastic bar must be greater than the distance that the two connecting structures maintain between its ends so that the elastic bar is kept buckled .
- the elastic bar is caused to adopt a buckled shape in order to reduce the stresses which make its undeformed configuration unstable (by buckled shape is meant a shape which is contained in a plane deformation containing an axis connecting the two ends of the elastic bar, and which is curved by deformation in a direction perpendicular to said axis).
- the curvature due to buckling can constitute a deformation of the bar in one direction or the other inside the plane of deformation, so that the elastic bar, and by extension the relay device as a whole, has two stable configurations (this is the reason why the elastic bar and, by extension, the relay device can be qualified as “bistable”). It will be specified that, by "stable configuration”, we mean a configuration which is associated with a shape towards which the elastic bar always returns if it is moved away from it by a sufficiently low amplitude stress.
- the coupling element move with the pull rod and causes a reversal of the direction in which the elastic bar is buckled, and therefore a sliding of the pinion sliding in one direction or the other along the rod.
- the elastic bar is curved so as to lie entirely on one side of a plane perpendicular to the control rod which passes through the two ends of the elastic bar
- the two connecting structures are constituted by two slides each formed of a portion of slide and of a slide fixed to one of the ends of the elastic bar, the slide being orjentée askew with respect to the axis of the rod of control and the slide being arranged to slide in the slide.
- the elastic bar is shaped in such a way that, if the two sliders move along their respective slide portions, and that they thus cause the two ends to come together of the elastic bar, the deformation produced has the effect of moving the intermediate part of the elastic bar away from the aforementioned perpendicular plane. Conversely, if the ends of the elastic bar are forced apart, the intermediate part of the elastic bar approaches the perpendicular plane.
- the coupling element consists of a flexible blade whose ends are fixed to the two sliders, so that each end of the coupling element is secured to one of the ends of the elastic bar , the flexible blade being curved so as to lie entirely on the side of the perpendicular plane which is opposite to the side where the elastic bar is.
- a middle part of the coupling element is linked to the control rod so that when the control rod is moved from its neutral position to its active position, the middle part moves parallel to the axis of the control rod and in the same direction as the latter.
- the elastic bar is shaped in such a way that when a movement of the sliders causes the ends of the elastic bar to come together, the resulting deformation has the effect of causing the intermediate part of the elastic bar to move away of the perpendicular plane, and that reciprocally, when the ends of the elastic bar move apart from each other, its intermediate part moves in the opposite direction, approaching the perpendicular plane. Thanks to these characteristics, it is possible to associate a first predefined axial position of the control rod with a first axial position of the sliding pinion, and to associate a second predefined axial position of the control rod with a second axial position of the sliding pinion.
- the two connecting structures each comprise a pivot member (or ball joint) arranged to pivot about an axis contained in a plane perpendicular to the control rod and passing through the two ends of the elastic bar, the axes of the two connecting structures being parallel and being arranged on either side of the rod control.
- the coupling element comprises a flexible blade and two pivot members fixed respectively to the two ends of the flexible blade, on either side of the control rod. Each pivot member of the coupling element being arranged to pivot about an axis which is parallel to the axes of the two connecting structures.
- a middle part of the coupling element is linked to the control rod so that, when the control rod is moved in translation, the middle part moves parallel to the axis of the control rod and in the same meaning as this.
- the relay device comprises both an elastic bar inserted in an annular groove of the sliding pinion, and a flexible blade whose middle part is linked to the rod.
- the elastic bar and the flexible blade are preferably both perpendicular to the axis of the control rod and they preferably have rectilinear shapes when they are not deformed by stresses.
- the relay device further comprises connecting means arranged to kinematically connect the pivoting member of one of the connecting structures with one of the two pivoting members of the coupling element of so that when said pivoting member of the coupling element pivots, the pivoting member of said connecting structure is driven to pivot in the opposite direction.
- the connecting means comprise two toothed sectors, one of which is integral with said pivoting member of one of the connecting structures, and the other is integral with said pivoting member of the coupling element.
- the two toothed sectors are arranged to mesh with each other.
- FIG. 1 is a partial plan view a watch movement fitted with a known time-setting mechanism
- FIG. 2 is a schematic perspective view of a time-setting mechanism according to a first variant of a first particular embodiment of the invention
- FIG. 3 is a schematic perspective view showing a relay device intended to equip a time-setting mechanism according to a second variant of said first embodiment of the invention
- FIGS. 4A and 4B are schematic perspective views of a time-setting mechanism according to said second variant of the first embodiment of the invention, the time-setting mechanism integrating the relay device of FIG. 3, and FIGS.
- FIG. 5 is a schematic perspective view of a time-setting mechanism according to a third variant of said first embodiment of the invention, the sliding pinion being illustrated in its first axial position in which it meshes with the time setting reference;
- FIGS. 6A and 6B are block diagrams of a time-setting mechanism which comprises a tristable relay device, and which conforms to a fourth variant of said first embodiment of the invention.
- FIGS. 7A and 7B are plan views respectively of the back side and of the dial side of a time-setting mechanism according to a first variant of a second particular embodiment of the invention, the control stem being in a neutral position; the pull spring is omitted in the dial side plan view;
- FIGS. 8A and 8B are plan views respectively of the back side and of the dial side of the time-setting mechanism of FIGS. 7A and 7B, the control stem being in the active position; the pull spring is omitted in the dial side plan view;
- FIGS. 9A and 9B are plan views of the dial side of a time-setting mechanism according to a second particular variant of the second embodiment of the invention, the control stem being respectively in the neutral position and in the active position;
- FIG. 10 is a schematic plan view of a time-setting mechanism according to a third particular embodiment of the invention.
- FIG. 2 illustrates a time-setting mechanism which conforms to a first exemplary variant of this first embodiment.
- this mechanism comprises a winding/time-setting stem 21 and a sliding pinion 23 arranged to be guided coaxially by the stem, so as to be free to slide along it while being integral with she rotating.
- the rod 21 is axially movable between at least two predefined positions called respectively “neutral position” and “active position”.
- the mechanism also includes a winding pinion 29 which is loosely mounted on the stem 21 in the axis of the sliding pinion.
- a first end of the sliding pinion 23 is provided with a Breguet toothing provided to cooperate, in the neutral position of the stem 21, with a corresponding Breguet toothing of the winding pinion 29, and the second end of the sliding pinion comprises an edge toothing provided for, in the pulled-out position of the rod 21, to come into engagement with an intermediate transmission 31 .
- the rod 21 and the sliding pinion 23 are slaved to each other by a relay device which comprises a pull rod 25 and an elastic bar 27.
- the pull tab 25 is arranged to pivot about an axis 33, and it comprises two arms which extend on either side of its axis.
- the pull tab 25 is connected to the rod 21 by the end of one of its arms, so that the movements of the rod in translation cause the pivoting of the pull tab 25 around its axis 33.
- the relay device further comprises an elastic bar deformable in bending (referenced 27) and two connecting structures arranged to hold the two ends of the elastic bar 27.
- the two connecting structures consist of pivoting members (or ball joints) which are free to rotate around two parallel axes (referenced 35a and 35b) arranged on either side of the control rod 21.
- the elastic bar 27 extends transversely and symmetrically on either side of the control rod 21, and it can be seen that the intersection between the bar 27 and the rod 21 defines a right angle.
- the two parallel axes 35a and 35b could very well not be equidistant from the control rod 21 and/or the plane which contains the two axes 35a, 35b could not be oriented perpendicular to the stem.
- the undeformed length of the elastic bar 27 is chosen to be greater than the distance separating the two parallel axes 35a, 35b. Under these conditions, as the elastic bar 27 is much easier to deform in bending than in compression, its rectilinear configuration (shown in solid lines in the drawing) is unstable. The elastic bar 27 is thus led to adopt a buckled configuration in a plane perpendicular to the two parallel axes 35a, 35b.
- the pull tab 25 comprises a coupling element arranged to cooperate with one of the two ball joints constituting the connecting structures or with the elastic bar 27 so that, when the control rod 21 is actuated in translation, so as to make it pass from the neutral position to the active position or vice versa, the pivoting of the pull tab 25 causes a reversal of the direction in which the elastic bar is buckled.
- the pull tab 25 comprises a first arm which is engaged in a groove of the rod 21 and a second arm which carries the coupling element.
- the latter comprises two parallel pins (respectively referenced 37a and 37b) which are oriented perpendicular to the plane in which the elastic bar 27 works in buckling. As shown in Figure 2, the two pins 37a, 37b define a narrow passage through which the elastic bar 27 passes.
- an intermediate part of the elastic bar 27 is inserted into an annular groove that the sliding pinion 23 has, so that the axial position of the latter is linked to that of the intermediate part of the elastic bar 27, and that it is thus possible to move the sliding pinion 23 axially by deforming the elastic bar.
- the two fundamental stable configurations of the elastic bar 27 are respectively associated with a first and a second extreme axial position of the sliding pinion 23.
- FIG. 2 it can be understood on the one hand that, when the rod 21 is pulled to bring it into the active position, the pull tab 25 is pivoted (counterclockwise in the drawing). When the pull tab pivots, the pin 37b pushes the elastic bar 27 back (in the direction of the left in the drawing). The elastic bar then adopts a buckled forward configuration (to the left in the drawing).
- the two fundamental stable configurations of the elastic bar 27 are respectively associated with a first and a second extreme axial position of the sliding pinion 23.
- FIG. 2 further shows that the extreme axial position of the sliding pinion, which is associated with the forward buckled configuration of the elastic bar 27, is the position of the pinion flowing in which its edge toothing engages with the intermediate transmission 31 .
- FIG. 2 shows that the extreme axial position of the sliding pinion 23, which is associated with the rearwardly buckled configuration of the elastic bar 27, is the position of the sliding pinion in which its Breguet toothing cooperates with the Breguet toothing of the pinion. winding 29.
- Figures 3, 4A and 4B relate to a second exemplary variant of the first embodiment.
- This second variant shares a significant number of common characteristics with the first variant. This is why the elements shown in Figures 3, 4A and 4B which are identical or similar to elements illustrated in Figure 2 are designated by the same reference numerals increased by 50.
- FIG. 3 is a schematic perspective view showing an exemplary embodiment of the monolithic relay device which is intended to equip a time-setting mechanism according to the second variant of the first embodiment.
- the illustrated relay device consists of a single piece which incorporates an elastic bar (referenced 77) and a pull tab (referenced 75) comprising a first arm and a second arm which extend in the extension of each other, on either side of an eyelet intended for the pivot axis 83 of the zipper. It can be seen that one of the two arms is secured to the bar 77 via a coupling element (referenced 87).
- the elastic bar 77 can be made in the form of a steel beam 13mm long, 0.3mm wide and 0.4mm high.
- the two arms of the pull tab 75 can be made in the form of square section beams with sides of 0.4 mm.
- the coupling element 87 can be made in the form of a relatively flexible steel blade 0.1mm wide and 0.4mm high.
- the pivot members which constitute the two connecting structures are arranged at the ends of the elastic bar 77. It can be seen that they are also integral with the rest of the relay device.
- FIGS. 4A and 4B are schematic perspective views of a time-setting mechanism which conforms to this second exemplary variant and which incorporates the relay device of FIG. 3. As can be seen, FIGS. 4A and 4B respectively show the control stem in the neutral position, the Breguet toothing of the sliding pinion 73 then cooperating with that of the winding pinion 79, and in the active position, the edge toothing of the sliding pinion 73 then being engaged with the intermediate transmission 81 .
- the two arms of the pull tab 75 and the elastic bar 77 are substantially parallel, and it can also be seen that the coupling element 87 consists of a flexible crosspiece whose ends are respectively joined to the end of the second arm of the pull tab and to the elastic bar 77. Finally, it can be seen that the junction between the coupling element 87 and the elastic bar 77 is located between 15% and 30% of the length of the elastic bar.
- Figure 5 shows a third exemplary variant of the first embodiment.
- This third variant shares a significant number of common characteristics with the first and the second variant. This is the reason why the elements shown in Figure 5 which are identical or similar to elements illustrated in Figure 2 are designated by the same reference numerals increased by 100.
- the pull tab 125 of the monolithic relay device comprises a single arm which extends from the pivot axis 133 of the pull tab, substantially parallel to the elastic bar 127. It can be seen that the arm passes in the groove of the rod 121 and that it is also connected to the elastic bar 127 by a coupling element constituted by a flexible crosspiece 137 whose ends are respectively joined to the end of the pull tab arm and to the elastic bar 127.
- figure 5 shows the sliding pinion when it is in its first axial position in which it meshes with the time setting gear.
- the control rod is therefore in the active position in the situation shown.
- Figure 5 it can be observed that the rod is in the pushed back position. It will therefore be understood that, according to the invention, the active position of the control rod does not necessarily correspond to the pulled out position and that conversely, the neutral position of the control rod does not necessarily correspond to the pushed back position.
- FIGS. 6A and 6B are block diagrams of a time-setting mechanism which conforms to a fourth exemplary variant of the first embodiment.
- This fourth variant shares a large number of common characteristics with the previous ones. This is the reason why the elements represented in FIGS. 6A and 6B which are identical or equivalents to elements illustrated in FIGS. 4A and 4B are designated by the same reference numbers increased by 100.
- the fourth variant is essentially distinguished from the previous ones by the fact that the relay device has three stable configurations at instead of two.
- the illustrated mechanism comprises two elastic bars arranged transversely with respect to each other.
- a first of the two elastic bars is referenced 177.
- the bar 177 is part of the relay device of the mechanism illustrated in FIGS. 6A and 6B, and it performs the same functions as the single elastic bar of the variants described above.
- the relay device of the present variant comprises a second elastic bar (referenced 191).
- one of the ends of the first elastic bar 177 is connected to an intermediate part the second elastic bar 191, so that the latter acts as a connecting structure arranged to hold said end of the first elastic bar 177.
- the two ends of the second elastic bar 191 are integral with two pivot members mounted to pivot around two parallel axes (referenced respectively 193a and 193b).
- the distance which separates the two parallel axes is such that the second elastic bar 191 is kept buckled in one direction or the other between the two pivot members.
- Figure 6A shows the first position of stable equilibrium of the second elastic bar 191
- Figure 6B shows the second.
- FIG. 6A it can be understood that, when the second elastic bar 191 is in its first stable position, the distance between the two ends of the first elastic bar 177 is such that it is kept buckled.
- FIG. 6B it can be understood that when the second elastic bar 191 is in its second stable position, the distance between the two ends of the first elastic bar 177 is equal to its length, so that the first elastic bar occupies its only stable position, in which it is straight.
- the first elastic bar 177 can occupy two stable positions when the second elastic bar 191 occupies a first of its two stable positions, whereas it can only occupy one only stable position when the second elastic bar occupies the second of its stable positions. It will therefore be understood that the relay device comprising the two elastic bars 177 and 191 thus has three stable positions. It is therefore a sad device.
- FIGS. 7A, 7B, 8A, 8B, 9A and 9B relate to a second particular embodiment of the invention.
- FIGS. 7A, 7B, 8A and 8B illustrate a first exemplary variant of the time-setting mechanism according to this second embodiment.
- the second embodiment, and more particularly the first variant of this embodiment shares a large number of common characteristics with the first embodiment. It is for this reason that elements shown in figures 7A, 7B, 8A and 8B which are identical or similar to elements illustrated in figure 2 are designated by the same reference numerals increased by 200.
- the time-setting mechanism comprises a winding/time-setting stem 221 and a sliding pinion 223 arranged to be guided coaxially by the stem, so as to be free to slide along it. it while being integral in rotation.
- the rod 221 is axially movable between at least two predefined positions called respectively “neutral position” and “active position”.
- the mechanism also includes a winding pinion 229 which is loosely mounted on the stem 221 facing the sliding pinion.
- a first end of the sliding pinion 223 is provided with a toothing Breguet provided to cooperate, in the neutral position of the stem 221, with a corresponding Breguet toothing of the winding pinion 229, and the second end of the sliding pinion comprises an edge toothing provided for, in the drawn position of the stem 221, to come into engagement with an intermediate reference 231 .
- FIGS. 7A and 8A also show a bridge (referenced 226) which is arranged to hold the various components of the time-setting mechanism in place. In the time-setting mechanisms of the prior art, this bridge also comprises a long arm which acts as a draw-bar spring. This is the reason why, in accordance with usage, this bridge is hereinafter referred to as the “pull bar spring 226”.
- the rod 221 and the sliding pinion 223 are slaved to each other by an inverter relay device.
- This device firstly comprises an elastic bar 227 which is deformable in bending and two connecting structures arranged to hold the two ends of the elastic bar.
- the two connecting structures are each constituted by a slide comprising on the one hand a slide portion 233 oriented askew with respect to the axis of the rod 221, and on the other hand a slider ( respectively referenced 235a and 235b) which is fixed to one of the ends of the elastic bar 227 and which is arranged to slide along the slide portion.
- the elastic bar 227 is not straight, but curved so as to lie entirely on one side of a plane 228 (FIGS.
- the curvature of the elastic bar is substantially similar to that of a broken line, this broken line extending on either side of the control rod 221, symmetrically with respect to the axis of this last.
- an intermediate part of the elastic bar 227 is inserted into an annular groove presented by the sliding pinion 223. The axial position of the latter is thus linked to that of the intermediate part of the elastic bar, so that it is possible to move the sliding pinion 223 axially by deforming the elastic bar 227.
- the thicker part of the elastic bar, which is inserted into the groove of the sliding pinion is perpendicular to the control rod.
- the pull rod spring 226 comprises two side arms which extend symmetrically on either side, in the extension of one of the the other, perpendicular to the axis of the control rod 221.
- the two side arms of the pull rod spring each comprise an edge (referenced 233) which is oriented perpendicular to the axis of the control rod and against which one of the two sliders 235a and 235b is provided to rest.
- the edges 233 constitute the slide portions along which the two slides 235a, 235b are arranged to slide.
- the changeover relay device further comprises a flexible strip 237 which fulfills the function of coupling element.
- the two ends of the flexible blade are fixed to the two sliders 235a, 235b, so that each end of the coupling element (or in other words of the flexible blade 237) is integral with one of the ends of the elastic bar 227.
- the flexible blade is further curved so as to be entirely on the side of the perpendicular plane 228 which is opposite to that where the elastic bar 227 is located.
- a middle part of the flexible blade 237 is linked to the control rod 221 so that when the control rod is moved from its neutral position to its active position, the middle part of the flexible blade moves parallel to the axis of the control rod and in the same direction as the latter.
- the connection between the control rod 221 and the coupling element 237 involves a pull tab 225.
- the latter is connected to the rod 221 by its single arm, so that, when the rod is moved in translation, it pivots in one direction or the other around its axis 232.
- the arm of the pull tab 225 also comprises a bearing surface against which the middle part of the flexible blade 237 is in support.
- the flexible blade 237 bears not only against the pull tab 225, but also (by its ends) against the slide portions 233. It will be understood that this arrangement has the effect of permanently subjecting the flexible blade 237 to bending stresses. In response to these stresses, the middle part of the flexible blade exerts pressure on the bearing surface of the pull tab 225, while the two sliders 235a, 235b exert pressure in the opposite direction on the slide portions 233.
- the elastic bar 227 is linked to the sliding pinion 223, and finally that each end of the elastic bar is integral with one of the ends of the flexible blade, it can be understood that the inverter device which has just been described makes it possible to slave the movements of the sliding pinion 223 to the translation movements of the control rod 221 .
- FIGS 7A, 7B, 8A and 8B again show an elastic rod 239 which is deformable in bending and which is rigidly fixed to the pull tab 225 by one of the ends.
- the attachment of the end of the elastic rod to the pull tab is located at the level of the pivot axis 232 of the latter.
- the other end of the elastic rod 239 is fixed to a ball joint arranged to pivot around an axis 241.
- the non-deformed length of the elastic rod 239 is chosen to be greater than the distance separating the axis 241 from the axis 232. Under these conditions, the elastic rod 239 has the possibility of adopting one or the other of two stable configurations which are buckled in opposite directions in a plane perpendicular to the axes 241 and 232.
- the elastic strip 239 is therefore bistable.
- the pull tab 225 When the rod 221 is pulled to bring it into the active position, the pull tab 225 is pivoted (counterclockwise in FIGS. 7B and 8B). As the elastic rod 241 is fixed rigidly to the pull tab, the pivoting of the pull tab causes the switching of the elastic rod from one to the other of its two stable configurations.
- the spring rod 239 therefore adopts a forward buckled configuration (to the left in FIGS. 7B and 8B) when the control rod 221 is switched from its neutral position to its active position. Conversely, when the rod 221 is pushed back so as to bring it back to the neutral position, the pull tab 225 is pivoted (clockwise in FIGS. 7B and 8B).
- FIGS. 9A and 9B are plan views of the dial side of a time-setting mechanism according to a second particular variant of the second embodiment of the invention, the control rod being respectively in the neutral position and in the active position. It is important to keep in mind that the person skilled in the art is able to imagine a large number of alternatives to the use of a bistable rod as illustrated in figures 7A, 7B, 8A and 8B to make the inverter relay device of a time-setting mechanism according to the second embodiment bistable.
- Figures 9A and 9B illustrate an exemplary alternative in which the bistable function is an integral part of the relay device.
- FIGS. 9A and 9B can be quite similar to the first variant.
- the only part of the mechanism that is different is the pull rod spring (referenced 226' in figures 9A and 9B).
- the pull rod spring 226 ' is distinguished from the pull rod spring 226 in that the two slide portions 233' each have a prominence 243 that the slider 235a or 235b must cross when the control rod 221 passes from its neutral position. to its active position or vice versa. It will be understood that the presence of the prominences 243 makes it possible to lock the sliders in two distinct positions, so that the inverter relay device has two stable positions.
- the attached figure 10 relates to a third particular embodiment of the invention.
- This third embodiment shares a large number of common characteristics with the first embodiment. For this reason, elements shown in figure 10 which are identical or similar to elements illustrated in figure 2 are designated by the same reference numerals increased by 250.
- this mechanism comprises a winding/time-setting stem 271 and a sliding pinion 273 arranged to be guided coaxially by the stem, so as to be free to slide along it while being integral with it. in rotation.
- the rod 271 is axially movable between at least two predefined positions respectively called “neutral position” and “active position”.
- the mechanism also includes a winding pinion 279 which is loosely mounted on the stem 271 opposite the sliding pinion.
- a first end of the sliding pinion 273 is provided with a Breguet toothing provided to cooperate, in the neutral position of the stem 271, with a corresponding Breguet toothing of the winding pinion 279, and the second end of the sliding pinion comprises an edge toothing provided for, in the pulled position of the rod 271, come into engagement with an intermediate reference 281.
- the rod 271 and the sliding pinion 273 are slaved to each other by an inverter relay device.
- This device firstly comprises an elastic bar 277 which is deformable in bending and two connecting structures arranged to hold the two ends of the elastic bar.
- the two connecting structures each comprise a pivot member (or ball joint) 285a, 285b which is free to rotate around an axis contained in a plane 278 which is perpendicular to the axis of the rod control 271 and which passes through the two ends of the elastic bar 277.
- the axes of rotation of the two pivot members are also parallel.
- the elastic bar 277 extends transversely and symmetrically on either side of the control rod 271, and it can be seen that the intersection between the bar 277 and the rod 271 defines a right angle. It will however be understood that according to other variants not shown, the two pivot members 285a and 285b could very well not be equidistant from the control rod 271 and/or the plane 278 which contains the axes of the two pivot members 285a , 285b may not be oriented perpendicular to the control rod.
- FIG. 10 also shows that an intermediate part of the elastic bar 277 is inserted into an annular groove presented by the sliding pinion 273.
- the changeover relay device further comprises a coupling element comprising a flexible blade 287 and two pivot members 283a and 283b which are arranged on either side of the control rod 271 and each fixed to the one of the ends of the flexible blade 287.
- Each pivoting member 283a, 283b is arranged to pivot around an axis which is parallel to the axes of rotation of the pivoting structures 285a and 285b.
- a middle part of the flexible blade 287 is linked to the control rod 271 so that, when the control rod is moved from its neutral position to its active position or vice versa, the middle part of the flexible blade 287 moves parallel to the axis of the control rod and in the same direction as the latter.
- the relay device further comprises connecting means arranged to kinematically connect one (285a) of the pivoting members fixed to the ends of the elastic bar 277 with one (283a) of the pivoting members fixed at the ends of the flexible strip 287.
- these connecting means consist of two toothed sectors 289 respectively secured to the pivot members 285a and 283a. As shown in Figure 10 the toothed sectors 289 are arranged to mesh with each other.
- the connecting means are not necessarily constituted by two toothings.
- the connecting means could for example be constituted by a stretched belt at an "8" between two pulleys respectively fixed to the pivot members 285a and 283a.
- the elastic bar 277 and/or the flexible blade 287 could be bistable blades having two symmetrical buckled configurations.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Control Devices (AREA)
- Transmission Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP21201266.0A EP4163737A1 (fr) | 2021-10-06 | 2021-10-06 | Mécanisme de mise à l'heure pour pièce d'horlogerie |
| PCT/IB2022/059539 WO2023057942A1 (fr) | 2021-10-06 | 2022-10-06 | Mécanisme de mise à l'heure pour pièce d'horlogerie |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4413426A1 true EP4413426A1 (fr) | 2024-08-14 |
Family
ID=78085551
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21201266.0A Withdrawn EP4163737A1 (fr) | 2021-10-06 | 2021-10-06 | Mécanisme de mise à l'heure pour pièce d'horlogerie |
| EP22789318.7A Pending EP4413426A1 (fr) | 2021-10-06 | 2022-10-06 | Mécanisme de mise à l'heure pour pièce d'horlogerie |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21201266.0A Withdrawn EP4163737A1 (fr) | 2021-10-06 | 2021-10-06 | Mécanisme de mise à l'heure pour pièce d'horlogerie |
Country Status (2)
| Country | Link |
|---|---|
| EP (2) | EP4163737A1 (fr) |
| WO (1) | WO2023057942A1 (fr) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US647544A (en) * | 1899-08-28 | 1900-04-17 | Charles R Hansel | Stem winding and setting mechanism for watches. |
| CH154233A (fr) * | 1930-12-27 | 1932-04-30 | Fontainemelon Horlogerie | Mécanisme de mise à l'heure. |
| US2412493A (en) * | 1945-04-23 | 1946-12-10 | Hamilton Watch Co | Timepiece setting mechanism |
| EP2560054B1 (fr) * | 2011-08-17 | 2017-11-15 | ETA SA Manufacture Horlogère Suisse | Remontage d'un mécanisme d'horlogerie par pression ou traction |
-
2021
- 2021-10-06 EP EP21201266.0A patent/EP4163737A1/fr not_active Withdrawn
-
2022
- 2022-10-06 EP EP22789318.7A patent/EP4413426A1/fr active Pending
- 2022-10-06 WO PCT/IB2022/059539 patent/WO2023057942A1/fr not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| EP4163737A1 (fr) | 2023-04-12 |
| WO2023057942A1 (fr) | 2023-04-13 |
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