EP3043217B1 - Device for driving a mobile of a clockwork calendar mechanism - Google Patents

Description

The invention relates to a device for driving a mobile of a calendar mechanism. It also relates to a mechanism comprising such a device. It also relates to a watch movement comprising such a device or such a mechanism. Finally, it relates to a timepiece, in particular a wristwatch, comprising such a device, such a mechanism or such a movement.

The annual calendars known from the prior art are traditionally equipped with one or two mobile calendar drivers which are provided to cooperate with a cam or an auxiliary month wheel. This element bears the indication of the months and controls the double date jump mechanism at the end of each short month by means of any additional springs and levers. Such a construction can induce a particularly delicate sequencing of operation. If the installation of a mobile calendar trainer accompanied by an energy accumulator can possibly allow the design of an instantaneous jump calendar for the passage from the months of 31 days to the following month, the double date jump to the end of 30-day months can be problematic, on the one hand, due to the sequencing of the operation of two separate kinematic chains for driving the date disc and, on the other hand, due to the additional energy that such jump requires.

Demand for patent EP0987609 describes an annual calendar mechanism fitted with two kinematic chains for driving the date disc. A first mobile calendar trainer allows, every day, a first jump of the date disc. A second calendar driving mobile, called a correction mobile, allows an additional jump of the date disc at the end of a month of thirty. days. This is pivoted on a rocker whose angular position is controlled by a cam of months and return springs. Such a construction requires a large number of parts, in particular springs and levers, and consumes a lot of energy. Furthermore, due to the sequencing of operation of such a mechanism, it is very difficult to achieve a perfectly instantaneous date jump in the calendar at the end of a short month.

The document US3827234 discloses a semi-trailing annual calendar, the mechanism of which implements two distinct kinematic chains for driving the date disc, without requiring either annual cam or lever. A first mobile conventional calendar trainer allows, every day, a first jump of the date disc. A second mobile allows an additional jump of the date disc at the end of a thirty-day month. This mobile has teeth whose number and arrangement are defined such that these teeth allow the actuation of an additional tooth of the date disc at the end of a short month, and thus allow, in cooperation with the mobile conventional trainer, a double jump of the date disc. Such a mechanism has the advantage of being simple with regard to cam and lever devices, in particular vis-à-vis the mechanism disclosed in the document. EP0987609 . The arrangement and the number of teeth of the second mobile in fact make it possible, without any other additional device, to recognize short months from long months. However, the kinematic drive chain of the second mobile requires an indexing device which is added to the traditional jumper of the date disc, which results in the installation of an additional spring provided to cooperate with a star. which carries the teeth of the second mobile. It is therefore very difficult to achieve the implementation of an annual calendar with instantaneous date jump on the basis of such a mechanism, on the one hand, due to the coordination required for synchronized operation of the two. drive chains for the date disc and, on the other hand, because of the energy required to allow the instantaneous drive of two separate driving wheels, each mobile in fact requiring an energy accumulator dedicated to it.

Demand for patent EP1666991 discloses a dragging annual calendar mechanism, which is provided with a single movable calendar trainer. This one wears two training fingers. The first finger allows, every day, a first jump of the date disc. The second finger is designed to drive the date disc by an additional step, in particular by means of a months mobile placed in the center of the movement. This mobile consists of two wheels fixed one on the other. At the end of a thirty-day month, from the thirty to the “thirty-one”, the month mobile is driven with a first angular step by means of an additional tooth carried by the date disc which is itself. even operated by the first finger of the mobile calendar trainer. From "thirty-one" to the first of the following month, the month mobile is actuated by a second angular step by the second finger of the calendar wheel, and consequently drives the date disk by an additional step by means of the additional tooth of the date disc. Such sequencing is made possible by the fact that the schedule is purely dragging. The synchronized drive of each of the elements, in particular the date disc and the month mobile, would indeed lead to the device being blocked. Thus, it is not possible to achieve the implementation of an annual calendar with instantaneous date jump on the basis of such a mechanism.

The aim of the invention is to provide a device for driving a calendar mobile or calendar member making it possible to remedy the aforementioned drawbacks and to improve the training devices known from the prior art. In particular, the invention provides a simple, compact, reliable and robust training device, in particular for the implementation of an annual calendar with instantaneous date jump.

The training device according to the invention is defined by claim 1.

The figures 1 to 24 represent, by way of example, an embodiment of a timepiece according to the invention.

An embodiment of a timepiece 130 is described below with reference to figures 1 to 24 . The timepiece is for example a wristwatch. The timepiece comprises an embodiment of a watch movement 120 according to the invention, in particular a mechanical watch movement. The movement includes an embodiment of a calendar mechanism 110 according to the invention, in particular an annual calendar mechanism, in particular an annual calendar mechanism of the instantaneous jump type. The term “instantaneous jump calendar mechanism” is understood to mean a calendar mechanism whose transitional phase between two consecutive date displays typically lasts less than a tenth of a second, in normal operation. The calendar mechanism comprises for example one or more mobile date indication, for example a disc 3 having inscriptions representative of the dates 1 to 31 or a mobile hand to come. next to date indications or two discs, a first disc having inscriptions representative of tens of dates and a second disc having inscriptions representative of units of dates. Advantageously, the annual calendar mechanism can also include elements indicating the month. The annual calendar mechanism typically only requires one correction per year, typically a correction at the end of February.

The calendar mechanism 110 includes one embodiment of a training device 100 according to the invention.

The embodiment of the training device 100 is described in more detail below with reference to figures 1 to 9 . The device makes it possible to drive the mobile 3 of the calendar watch mechanism 110, in particular the disc 3 having date indications. For example, this disc is intended to cooperate with an aperture in order to produce a display of the current date in this aperture.

• un mobile d'entraînement 2 incluant un premier doigt 20a et un deuxième doigt 20b ;
• un mobile de programmation 1 ou un mécanisme de programmation 1 incluant une première denture 10a, une deuxième denture 10b et une troisième denture 10c ; et
• le mobile 3 d'indication des quantièmes incluant une quatrième denture 30a et une cinquième denture 30b.

Le premier doigt est apte à coopérer avec la première denture, le deuxième doigt est apte à coopérer avec la deuxième denture, la première denture est apte à coopérer avec la quatrième denture et la troisième denture est apte à coopérer avec la cinquième denture.The training device mainly includes:

• a driving wheel 2 including a first finger 20a and a second finger 20b;
• a programming wheel set 1 or a programming mechanism 1 including a first toothing 10a, a second toothing 10b and a third toothing 10c; and
• the date indication mobile 3 including a fourth set of teeth 30a and a fifth set of teeth 30b.

The first finger is able to cooperate with the first toothing, the second finger is able to cooperate with the second toothing, the first toothing is able to cooperate with the fourth toothing and the third toothing is able to cooperate with the fifth toothing.

Thus, the first finger is able to actuate the first toothing, in particular by engagement, the second finger is able to actuate the second toothing, in particular by engagement, the first toothing is able to actuate the fourth toothing, in particular by engagement, and the third toothing is able to actuate the fifth toothing, in particular by meshing.

Thus, it is possible to obtain a particularly simple drive device intended to drive the date indication mobile or date mobile. The simplicity of the architecture brings reliability and robustness to the device. This reliability and robustness can be taken advantage of to achieve a timing mechanism of the instantaneous jump type.

Advantageously, the second and third teeth are separate, that is to say that the teeth of the second teeth do not cooperate either with the fourth set of teeth or with the fifth set of teeth and the teeth of the third set of teeth cooperate with the fifth set of teeth without cooperating. with the fourth toothing.

Advantageously, the first finger 20a and the second finger 20b of the driving wheel set 2 are not movable relative to one another. Advantageously, the fourth set of teeth 30a and the fifth set of teeth 30b of the date indication wheel set cannot be moved relative to one another.

The programming mobile 1 has the particularity of being placed at the interface of the calendar drive mobile 2 and the date display or date indication disc 3. The programming mobile makes it possible to recognize and distinguish short months from long months.

Advantageously, the first finger 20a, the first set of teeth 10a and the fourth set of teeth 30a are arranged on a first level, in particular are arranged at the level of a first plane P1 as shown partially in the figure. figure 9 . Additionally, the second finger 20b and the second set of teeth 10b can be arranged on a second level, in particular be placed at the level of a second plane P2. As a further complement, the third set of teeth 10c and the fifth set of teeth 30b can be arranged on a third level, in particular be placed at the level of a third plane P3. These planes P1 and / or P2 and / or P3 are for example perpendicular to the axes of rotation 11 and 12 of the programming mobile and the drive mobile.

As shown in particular on figures 2 , 4 and 6 , the programming mobile 1 comprises a first wheel 1a and a second wheel 1b. These two wheels are for example superimposed. The first teeth are on the first wheel and the second and third teeth are on the second wheel. The two wheels are advantageously linked in rotation by a link 1c, 1d, 1e, 1f, 1g, 1h, 1i allowing relative movement of the first and second wheels, that is to say that the first and second wheels are movable, in particular movable in rotation with respect to one another. The first and second wheels can be pivoted on each other at their axes. The first and second wheels can be arranged so as to be able to be moved relative to each other by a value of the order of the angular pitch of the first and second wheels, in particular 30 °. This connection can be assimilated to a clutch at least in certain operating phases of the device.

Advantageously, as represented by figure 5 , the programming mobile comprises a return element 1c, such as a spring 1c, recalling the first and second wheels in a first predefined relative position, either a rest or recall position.

In addition, the programming mobile may include a first stop 1d, in particular constituted by a portion of wall 1d of an opening 1i formed for example on the wheel 1a, and a second stop 1e, in particular a pin 1e. These first and second stops cooperate to define, when they are in contact with one another, the first predefined position of the wheel 1a relative to the wheel 1b. The first and second stops may be located respectively on the first and second wheels 1a, 1b or be located respectively on the second and first wheels 1a, 1b.

The spring 1c and the stopper 1d may be integral with the plate of the first wheel 1a. The pin 1e can be driven out on the board of the second wheel 1b. The second wheel 1b can thus be angularly indexed relative to the first wheel 1a by means of the pin 1e which is pressed against the stop 1d under the effect of the spring 1c.

The programming mobile 1 can comprise a third stop 1g, in particular a wall 1g of an opening, or of the aforementioned opening 1i, and a fourth stop 1h, in particular a surface 1h of the return element 1c, in particular a surface 1h of one end of the return element 1c. The third and fourth stops may be located respectively on the first and second wheels 1a, 1b or be located respectively on the second and first wheels 1a, 1b.

The first and second wheels 1a and 1b of the drive mobile are both designed to be actuated, every day, by the calendar drive mobile 2. For this purpose, the drive mobile is provided, as seen previously two drive fingers 20a and 20b.

These fingers are advantageously superimposed or located on two levels relative to the axis of rotation 12 of the driving wheel set. These first and second fingers are each dedicated to driving the first and second teeth 10a, 10b of the wheels 1a, 1b. Thus, preferably, the first drive finger 20a can be placed on the first level P1, and the second drive finger 20b can be placed on the second level P2. The mobile drive 2 also includes a calendar wheel 5, performing a complete rotation in 24 hours. This wheel 5 is connected to a gear train 4 of the basic movement of the timepiece. The drive mobile 2 further comprises a cam 6 which is provided to cooperate with an energy accumulator, so that the drive fingers 20a and 20b can instantly drive the programming mobile 1 at midnight, c 'That is to say that the first and second fingers arrive in a start-of-gear position with the toothings of the wheels of the programming mobile, mesh with these toothings, then leave an end-of-gear position with these toothings, in a duration typically less than a tenth of a second.

The cam 6 can be fixed on the first and second drive fingers 20a, 20b. A clutch between the calendar wheel 5 and the cam 6 (not shown) can be implemented by means of conventional means, such as for example an oblong cutout shaped to cooperate with a pin, or by a locking device such as the one disclosed in the request for patent EP2428855A1 , in particular in the passage of paragraphs 16 to 21.

The energy accumulator may include a lever 7 provided with a roller 7a which is applied against the side of the cam 6 by a spring 8.

The programming mobile 1 is continuously engaged with the date display disc 3. Thus, an actuation of the drive mobile, in particular an actuation of the drive mobile over one revolution, induces the rotation of the date display disc 3, in particular over at least one angular step.

More particularly, the first toothing 10a of the first wheel 1a is continuously engaged with the fourth toothing 30a of the date disc 3. This fourth set of teeth can be angularly indexed relative to the frame of the movement by means of a nose 9a of a jumper 9, as shown in FIG. figure 1 . Thus, the programming mobile 1 is also positioned angularly, indirectly, by the nose 9a of the jumper 9, up to the backlash. Alternatively, the jumper can cooperate directly with the first set of teeth 1a of the first wheel. In this case, it is the disc 3 which is also positioned angularly, indirectly, by the jumper. The jumper 9 can cooperate with the fourth set of teeth 30a or with the first set of teeth 10a.

Advantageously, the jumper and the return element are shaped and arranged so that the resistive torque opposing the rotation of the first wheel and exerted by the jumper is greater than the resistant torque opposing the rotation of the second wheel. and exerted by the return element, these torques being expressed around the same axis, in particular around the axis 11 of rotation of the programming mobile.

In addition to the 31 teeth of the fourth set of teeth 30a, the date wheel set also has a fifth set of teeth 30b. This fifth set of teeth can in particular comprise a single tooth. This fifth set of teeth can be superimposed on the fourth set of teeth 30a as shown in figure 4 . These fourth and fifth teeth are for example superimposed. These fourth and fifth teeth are advantageously superimposed or located on two levels relative to the axis of rotation of the date wheel set.

The tooth of the fifth set of teeth 30b is capable of being actuated by the third set of teeth 10c on the 30th of a short month (that is to say of a month of 30 days). Thus, the date disc 3 can be driven over two angular steps.

In the embodiment described, the first toothing 10a of the first wheel 1a comprises twelve teeth which are all identical. The second toothing 10b of the second wheel 1b also has twelve teeth. The third set of teeth comprises four teeth which are arranged to actuate the date disc. These four teeth correspond to the four short months of the year, with the exception of February. These are distributed within the second set of teeth 10b such that one or the other of these teeth is likely to meet opposite the tooth 30b on the 30th of a short month. The distribution of these teeth is explained later.

In the embodiment described, the teeth of the second set of teeth 10b and the teeth of the third set of teeth 10c are formed by common surfaces formed on the same part, in particular common surfaces extending parallel to the axis of rotation of the mobile. programming. Alternatively, the surfaces constituting the teeth of the second and third teeth may be discontinuous, that is to say there may be a discontinuity between the second and third teeth. The surfaces of the second and third teeth can be formed simultaneously, for example by machining, cutting or forming. Alternatively, the second toothing can be formed on a first part and the third toothing can be formed on a second room. The first and second parts can then be assembled or attached to each other to form the second wheel.

In another embodiment not shown, the first set of teeth may have a number of teeth which is a multiple of twelve, for example 24 or 36 teeth, and / or the second set of teeth may have a number of teeth which is a multiple of twelve. , for example 24 or 36 teeth, and / or the third set of teeth may have a number of teeth which is a multiple of four, for example 8 or 12 teeth, and / or the fourth set of teeth may have thirty-one teeth and / or the fifth set of teeth may have one tooth.

The operation of the drive device is described in detail below.

We describe a conventional date jump at the end of a 31-day month, for example at the end of January. The operation is the same on the other days of the month, with the exception of the change from the 30th of a short month to the first of the following month. The figure 7 illustrates the annual calendar mechanism on January 30, just before the date jump from January 30 to 31.

Throughout the day, the wheel 5 drives the cam 6 and accumulates the energy necessary for the instantaneous jump of the fingers 20a and 20b by charging the spring 8 through the profile of the cam 6 and the rocker 7. Just before the date has passed, the roller 7a reaches the top of the profile of the cam 6. The figure 7 illustrates the mechanism in such a configuration. Note that the teeth 20a, 20b are out of reach of the teeth 10a, 10b.

The figures 8 to 12 illustrate the device during the date jump from January 30 to 31. Firstly, the tooth 20b of the driving mobile unit 2 actuates one of the teeth of the teeth 10b of the wheel 1b as illustrated. on the figures 8 to 10 , which induces a relative displacement between the wheel 1b and the wheel 1a by the deformation of the spring 1c under the effect of the displacement of the pin 1e. This is made possible by the fact that the return torque produced by the spring 1c is appreciably less than the return torque produced by the jumper 9 of the date disc. The rotation of the wheel 1b here has no effect on the date disc because the tooth 106b which is located opposite the tooth 30b of the date disc is shaped so as not to actuate the tooth 30b. More particularly, the thickness of the tooth 106b is defined so that this tooth can pass above the tooth 30b as shown in the figure. figure 9 . In other words, in this configuration, there is no tooth of the third set of teeth which can cooperate with the tooth 30b of the fifth set of teeth.

The wheel 1b continues to rotate as long as the finger 20b drives the teeth 10b. The figure 10 represents the finger 20b at the end of the run. The spring 1c is ready to restore the accumulated energy so as to reindex the wheel 1b relative to the wheel 1a, or to return the first and second wheels to their relative rest position, at the instant, or substantially at the instant , where the finger 20a actuates one of the teeth of the teeth 10a of the wheel 1a as shown in figure 11 .

The figure 11 represents the tooth 20a of the driving mobile unit 2 at the instant when the latter actuates one of the teeth of the toothing 10a of the wheel 1a, which induces the rotation of the wheel 1a and of the wheel 1b, the two wheels being integral in rotation under the effect of the means 1c, 1d, 1e. The rotation of the wheel 1a causes the disc 3 to jump over an angular pitch of the date disc, given that the toothing 10a is continuously engaged with the toothing 30a of the date disc as illustrated by figure 9 . The figures 11 to 13 represent such a leap of the date disc. Once the jump has been completed as shown on the figure 13 , the finger 20a, held in position under the effect of the locking of the cam 6, is located in the toothing 10a so as to avoid any risk of additional jumping of the date disc.

Thus, the conventional date jump is achieved by the rotation of an angular pitch of the wheel 1a, which also involves the rotation of an angular pitch of the wheel 1b. Thus, every day at midnight, the mobile 1 rotates at least one angular step.

A date jump at the end of a 30-day month, for example at the end of September, is described below. The figure 14 illustrates the annual calendar mechanism on September 30, just before the date jump from September 30 to October 1. In this configuration, the mobile 1 is positioned such that a tooth 102c of the wheel 1b is able to actuate the tooth 30b of the date disc. To do this, a single conformation 102b, 102c allows interaction with the fourth set of teeth and with the tooth 30b of the fifth set of teeth as shown in the figure. figure 15 . The actuation of the tooth 30b induces the displacement of the date disc 3 over a first angular pitch of the date disc as shown in the figures. figures 16 to 18 . The movement of the date disc also causes the rotation of the wheel 1a by means of the first 10a and fourth 30a teeth which are continuously engaged. Thus, the wheels 1a and 1b pivot in a synchronized manner during a first jump of the date disc to go from 30 to “31” of a short month, so that the mobile 1 rotates by a first angular step.

The figures 16 to 18 represent the finger 20b of the driving wheel 2 during actuation of the teeth 10b of the wheel 1b to allow the first jump of the date disc, from 30 to “31”.

The figures 19 to 21 represent the finger 20a of the driving wheel 2 during actuation of the teeth 10a of the wheel 1a to allow the second jump of the date disc, from "31" to the 1st of the following month.

The figure 22 illustrates the mechanism once the double date jump has been made. As seen above, the finger 20a, held in position under the effect of the locking of the cam 6, is located in the toothing 10a so as to avoid any risk of the date disc jumping further.

The angular displacement of the date disc is a function of the angular displacement of the mobile 1, namely the angular displacement of the wheels 1a and 1b relative to the frame of the movement. If a conventional date jump is achieved by rotating one angular step of wheel 1a, which also involves rotating one angular step of wheel 1b, a double date jump at the end of a short month involves the rotation of the mobile 1, namely the rotation of the wheels 1a and 1b over two angular steps of the mobile 1.

Over a full year, mobile 1, whose wheels 1a and 1b have twelve teeth each, therefore performs thirty-one turns. The Applicant's studies have shown that it is possible to arrange teeth within the set of teeth 10c which are shaped to actuate the tooth 30b of the disc 3 only on the 30th of a short month. It turns out that these teeth are four in number for wheels 1a and 1b with twelve teeth, and are each dedicated to a particular month without considering the month of February, as shown on the diagrams. figures 15 and 23 . These teeth 102c, 103c, 104c, 105c are arranged side by side, and constitute a toothed sector of the teeth 10c. As seen previously, in our particular construction, the conformations 102b, 102c and 103b, 103c and 104b, 104c and 105b, 105c are thicker than the conformations 101b and 106b to 112b constituting the teeth of the second set of teeth. Thus, the conformations 102b, 102c and 103b, 103c and 104b, 104c and 105b, 105c can interact with the tooth 30b. Alternatively, the teeth of the third set of teeth could have a different geometry from that of the teeth of the second set of teeth. For example, the third toothing could have a head diameter different from that of the second toothing. The fifth toothing could also have a head diameter different from that of the fourth toothing.

The table of the figure 24 illustrates the cycle of rotations of wheel 1b over the course of a year, and highlights the teeth of the second and third teeth which appear opposite tooth 30b of the date disc every 30th of the month. Columns J, F, M, A, M, J, J, A, S, O, N, D respectively represent the twelve months (M) of the year in chronological order. The lines indicate the dates (Q) of the month (M) of the year.

• les dents 102b et 102c se présentent en regard de la dent 30b à la fin du mois de septembre,
• les dents 103b et 103c se présentent en regard de la dent 30b à la fin du mois d'avril,
• les dents 104b et 104c se présentent en regard de la dent 30b à la fin du mois de novembre,
• les dents 105b et 105c se présentent en regard de la dent 30b à la fin du mois de juin,

Les dents 106b à 112b se situent chacune en regard de la dent 30b à la fin d'un mois de 31 jours. Celles-ci ne peuvent pas interagir avec la dent 30b.We notice that :

• teeth 102b and 102c appear opposite tooth 30b at the end of September,
• teeth 103b and 103c appear opposite tooth 30b at the end of April,
• teeth 104b and 104c appear opposite tooth 30b at the end of November,
• teeth 105b and 105c appear opposite tooth 30b at the end of June,

Teeth 106b to 112b are each located opposite tooth 30b at the end of a 31-day month. These cannot interact with tooth 30b.

The applicant's studies have shown that the principle is valid for any mobile 1 whose wheels 1a, 1b are provided with N teeth where N is a multiple of 12. The teeth 1c is then provided with n shaped teeth to actuate the tooth 30b. , which are divided into N / 12 sectors on mobile 1, where n is a multiple of four with N / n = 3.

Of course, the month of February can be considered as a short month which consists of 30 days, although an adjustment will have to be made. In this case, the wheel 1b can then be provided with n 'teeth with n' = n + N / 12.

In the embodiment described above, the wheels 1a and 1b are provided with external toothings 10a, 10b, 10c which are provided to cooperate with internal toothings 30a, 30b of the date display mobile 3. Alternatively, the teeth 30a, 30b of the date display disc 3 can be in the form of external teeth. Alternatively, the wheels 1a and 1b can be provided with internal teeth 10a, 10b, 10c which can for example cooperate with external teeth 30a, 30b of the date display mobile 3, in particular for N = 24 or N = 36. In these alternative constructions, the mobile 3 may for example have the shape of a disc or of a wheel on which is attached a display hand for the indication of the dates. Alternatively, the programming mobile 1 and / or the mobile 3 can be provided to actuate a mechanism for displaying a “big date”.

In the embodiment described above, the profiles of the teeth 10a, 10b and 10c are identical. Alternatively, the profiles can of course differ so as to be optimized respectively with respect to the elements 20a, 30a and 20b, 30b with which they cooperate.

In the embodiment described above, the angular indexing element 9 is provided to cooperate with the teeth 30a of the date disc 3. Alternatively, this indexing element can be provided to cooperate with the wheel 1a. Such a configuration can be advantageous for a wheel 1a provided with internal toothing 10a.

A month display can for example be implemented by a device comprising a month display disc kinematically linked to the date display disc. Thus, it is possible to implement a particularly simple realization of an annual calendar. The month display device may be as described in patent applications EP2428856 and EP2624075 .

The training device according to the invention is particularly simple, like the device disclosed in the application. EP1596261 . The drive device according to the invention uses a reduced number of parts, and is based on a single kinematic chain for driving the date disc.

The drive device according to the invention also has the advantage of being particularly compact, and of implementing a particularly simple date disc structure.

In this document, in “programming mobile”, the term “mobile” means an organ or a set of parts or a mechanism capable of moving or of moving. The various parts of the assembly or of the mobile are movable with respect to each other and with respect to the other parts of the device. In this document, in “programming mobile”, the term “mobile” does not mean a single wheel or a single disc.

Preferably, the date mobile 3 is formed by a single part.

Preferably, the drive mobile 2 is formed by a single piece.

Claims (16)

1. A device (100) for driving a date mobile (3) of a horological calendar mechanism (110), the device comprising:

   - a driving mobile (2) including a first finger (20a) and a second finger (20b);

   - a programming mobile (1) comprising a set of various parts that are mobile regarding one another and regarding other parts of the device and including a first set of teeth (10a), a second set of teeth (10b) and a third set of teeth (10c); and

   - the date mobile (3) including a fourth set of teeth (30a) and a fifth set of teeth (30b),

   wherein the first finger cooperates with the first set of teeth, the second finger cooperates with the second set of teeth, the first set of teeth cooperates with the fourth set of teeth and the third set of teeth cooperates with the fifth set of teeth.
2. The device as claimed in the preceding claim, wherein the programming mobile comprises a first wheel (1a) and a second wheel (1b), the first set of teeth being located on the first wheel and the second and third sets of teeth being located on the second wheel.
3. The device as claimed in the preceding claim, wherein the first and second wheels can be displaced relative to one another and wherein the programming mobile comprises a return element (1c), such as a spring (1c), returning the first and second wheels to a first predefined relative position.
4. The device as claimed in claim 2 or 3, wherein the programming mobile (1) comprises a first abutment (1d) and comprises a second abutment (1e), the first and second abutments being located respectively on the first and second wheels or being located respectively on the second and first wheels.
5. The device as claimed in one of claims 2 to 4, wherein the programming mobile (1) comprises a third abutment (1g) and comprises a fourth abutment (1h), the third and fourth abutments being located respectively on the first and second wheels or being located respectively on the second and first wheels.
6. The device as claimed in one of claims 2 to 5, wherein the first and second wheels are arranged so as to be able to be displaced relative to one another by a value of the order of the angular pitch of the first and second wheels, in particular by 30°.
7. The device as claimed in one of claims 2 to 6, wherein the device comprises a jumper (9) cooperating with the fourth set of teeth (30a) or with the first set of teeth (10a).
8. The device as claimed in claim 7, wherein the jumper and the return element are arranged such that the resisting torque opposing the rotation of the first wheel and exerted by the jumper is greater than the resisting torque opposing the rotation of the second wheel and exerted by the return element.
9. The device as claimed in one of the preceding claims, wherein the first set of teeth has a number of teeth which is a multiple of twelve and/or wherein the second set of teeth has a number of teeth which is a multiple of twelve and/or wherein the third set of teeth has a number of teeth which is a multiple of four and/or wherein the fourth set of teeth has thirty-one teeth and/or wherein the fifth set of teeth has one tooth.
10. The device as claimed in one of claims 1 to 8, wherein the first set of teeth has twelve teeth and/or wherein the second set of teeth has twelve teeth and/or wherein the third set of teeth has four teeth (102c, 103c, 104c, 105c), the teeth of the third set of teeth having an angular pitch of 30° and being juxtaposed at the level of four consecutive 30° angular segments and/or wherein the fourth set of teeth has thirty-one teeth and/or wherein the fifth set of teeth has one tooth.
11. The device as claimed in one of the preceding claims, wherein the first finger (20a), the first set of teeth (10a) and the fourth set of teeth (30a) are disposed on a first level and/or wherein the second finger (20b) and the second set of teeth (10b) are disposed on a second level and/or wherein the third set of teeth (10c) and the fifth set of teeth (30b) are disposed on a third level.
12. The device as claimed in one of the preceding claims, wherein teeth of the second set of teeth (10b) and teeth of the third set of teeth (10c) are formed by common surfaces of the second wheel (1b).
13. A calendar mechanism (110) comprising a device (100) as claimed in one of the preceding claims.
14. The mechanism as claimed in the preceding claim, wherein it is of the instantaneous jump type.
15. A horological movement (120) comprising a device (100) as claimed in one of claims 1 to 12 or a mechanism as claimed in claim 13 or 14.
16. A timepiece (130), in particular a wristwatch, comprising a device (100) as claimed in one of claims 1 to 12 or a mechanism as claimed in claim 13 or 14 or a movement as claimed in the preceding claim.

Images