Timepiece calendar system

Abstract

The invention relates to a timepiece calendar system (100), comprising an energy accumulation and recovery device comprising an energy accumulator (4) and a cam (33), a date movement (1), a month movement (2), a first element (7) for indexing the date movement (1), a second element (8) for indexing the month movement (2), a mover (3) for driving the date mover by recovering energy from the energy accumulator (4), and an element (6b) for driving the month mover by recovering energy from the energy accumulator (4), the element (6b) for driving the month mover being arranged and / or configured to limit movement of the month mover after driving the month mover.

Description

TECHNICAL FIELD

[0001] The invention relates to a timepiece calendar system. The invention also relates to a timepiece movement comprising such a timepiece calendar system. The invention also relates to a timepiece comprising such a timepiece movement or such a timepiece calendar system. The invention also relates to a method of operating such a timepiece calendar system or such a timepiece movement or such a timepiece. The invention also relates to an indicator mobile for a timepiece calendar system, in particular a month indicator mobile. BACKGROUND

[0002] Complete calendars are known in the watchmaking field. In particular, the book "Les montres calendriers modernes" by B. Humbert covers a large number of examples of complete calendars known from the fifties. Among others, a description can be found of a calendar board with four indications of the brand Jaeger-LeCoultre which is an epoque feature and in which a date mobile with 31 teeth is placed in the center of the movement. It is actuated periodically by a driving finger due to the rotational action of the hour wheel itself driven by the driving member of the base movement, thus completing a turn in 24 hours. As for the month mobile, it is updated once a month by the action of a finger carried by an intermediate mobile similar or identical to the date mobile, which itself is interengaged with the date mobile. Whether it concerns the indication of the date or the indication of the month, these indications are driven in "dragged" manner, that is to say, they are driven over several minutes or even hours. The rotational speed of the driving finger is constant, corresponding to the speed of the 24h mobile to which it is fixed, which itself is interengaged with the hour wheel. Thus, the indication of the date and the indication of the month remain identical over several minutes or even hours until the respective positioning stem of the date mobile and the month mobile restores its energy by repositioning said mobiles. Moreover, the indication of the date and the indication of the month can not be coordinated over such a time span.

[0003] The patent application CH 685 585 discloses a movable tooth of a date mobile which is elastically pushed on a month programming cam arranged concentrically with the date mobile in order to provide an annual calendar with a dragged jump. The kinematic chain of the date and the kinematic chain connecting the date mobile to the mobile supporting the month programming cam are particularly long and complex. They in particular lead to a certain number of stages which are incompatible with the compactness objectives of the calendar or of the movement containing such a calendar. Moreover, such a chain is greedy in energy, thus being detrimental to the implementation of a complete calendar with instantaneous jumps.

[0004] Patent application EP1734419 discloses a perpetual calendar with instantaneous jumps, which can take the form of a complete calendar. To this end, the calendar comprises a month programming cam for programming the months, which is eccentric with respect to a date mover, and a worm calendar cam. Such various cams are designed to cooperate with a plurality of levers, so their construction is particularly complex. In particular, the month programming cam is designed to position a month lever, which is connected to a rack, which is designed to drive a lever provided with a ratchet, which in turn is designed to actuate the teeth of the date mover.

[0005] Patent application EP3567438 discloses a calendar with a desmodromic system, which comprises a month programming cam cooperating with a cam follower designed to allow or inhibit the retraction of a movable tooth mounted on a date mover. The month programming cam is concentric with the date mover, so a cam follower is necessary to establish a connection between the month cam and the tooth mounted movably or moveably on the date mover. SUMMARY

[0006] The object of the present invention is to provide a timepiece drive device that can improve the devices known in the state of the art. In particular, the present invention proposes a reliable and simple system as an alternative to the existing systems, which can circumvent architectural and construction constraints.

[0007] According to a first aspect of the present invention, the object is defined by the following proposal.

[0008] 1. An instantaneous jump timepiece calendar system (100) comprising:

[0009] - an energy accumulation and recovery device comprising an energy accumulator (4) and a cam (33),

[0010] - a date mover (1),

[0011] - a month mover (2),

[0012] - a first element (7) for indexing the date mover (1),

[0013] - a second element (8) for indexing the month mover (2),

[0014] - a mover (3) for driving the date mover by recovering energy from the energy accumulator (4), and

[0015] - an element (6b) for driving the month mover by recovering energy from the energy accumulator (4),

[0016] The element (6b) for driving the month jumper is arranged and / or configured to limit the movement of the month jumper after driving the month jumper.

[0017] 2. The watch calendar system (100) according to proposal 1, characterized in that the second indexing element (8) of the month jumper (2) generates a torque for holding the month jumper (2) in a tensioned state, which is 1 / 2 or 1 / 1.5 of the torque generated by the first indexing element (7) of the date jumper (1) for holding the date jumper (1) in place.

[0018] 3. The watch calendar system (100) according to any one of proposals 1 or 2, characterized in that the first indexing element is a positioning rod (7) cooperating with a tooth (1a) of the date jumper.

[0019] 4. The watch calendar system (100) according to any one of proposals 1 to 3, characterized in that the second indexing element is a positioning rod (8) cooperating with a tooth (2a) of the month jumper.

[0020] 5. The watch calendar system (100) according to any one of proposals 1 to 4, characterized in that the driving jumper (3) comprises a first finger (31), such as a pin, adapted to cooperate by contact with a tooth (1a) of the date jumper.

[0021] 6. The watch calendar system (100) according to any one of proposals 1 to 5, characterized in that the driving jumper (3) comprises a second finger (32) adapted to cooperate by contact with an additional tooth (12b) of the date jumper.

[0022] 7. The watch calendar system (100) according to any one of proposals 1 to 6, characterized in that the driving jumper (3) comprises the cam (33).

[0023] 8. The watch calendar system (100) according to any one of proposals 1 to 7, characterized in that the date jumper (1) pivots around a first axis (A1), the month jumper (2) pivots around a second axis (A2), the driving jumper (3) pivots around a third axis (A3), the first axis (A1), the second axis (A2) and the third axis (A3) being different.

[0024] 9. The watch calendar system (100) according to proposal 8, characterized in that the first axis (A1) is located at the center of the calendar system (100) and / or at the center of a watch movement (200) and / or at the center of a watch (300).

[0025] 10. Watch calendar system (100) according to any one of propositions 1 to 9, characterized in that the element (6b) for driving the month mover comprises a third finger (6b) adapted to cooperate by contact with a tooth (2a) of the month mover.

[0026] 11. Watch calendar system (100) according to any one of propositions 1 to 10, characterized in that the element (6b) for driving the month mover comprises a first surface (61b) forming an abutment of the month mover (2), this surface (61b) being adapted to limit the movement of the month mover (2) by cooperating with a second surface (21a) of the month mover (2).

[0027] 12. Watch calendar system (100) according to any one of propositions 1 to 11, characterized in that it comprises:

[0028] - a week mover (5),

[0029] - a third element (9) for indexing the week mover (5),

[0030] - a third element (38) for driving the week mover by recovering energy from the energy accumulator (4).

[0031] 13. Watch calendar system (100) according to any one of propositions 1 to 12, characterized in that the third element (38) for driving the week mover is adapted and / or configured to limit the movement of the week mover after driving the week mover.

[0032] 14. Watch calendar system (100) according to any one of propositions 1 to 13, characterized in that it is a simple calendar system or an annual calendar system or a half-perpetual calendar system or a perpetual calendar system.

[0033] 15. Watch movement (200) comprising a system according to any one of propositions 1 to 14.

[0034] 16. Watch (300), in particular wristwatch, comprising a system (100) according to any one of propositions 1 to 14 and / or a watch movement according to proposition 15.

[0035] According to a second aspect of the invention, objects are defined by the following propositions.

[0036] 17. Watch calendar system (100), the system comprising:

[0037] - a date mover (1) pivoting around a first axis (Al),

[0038] - a first element (32) for driving said date jumper, such as a finger,

[0039] - a second element (12) for driving said date jumper, said second element (12) comprising, for example, a tooth (12a) for driving said date jumper, said second driving element (12) being mounted on said date jumper (1) so as to be movable between a retracted position and a driving position, and

[0040] - a month cam (22) pivoting about a second axis (A2),

[0041] said month cam (22) being adapted to cooperate with said second element (12) for driving said date jumper, so that, depending on the position of said month cam (22), said month cam (22) allows or prohibits the retraction of said second element (12) for driving said date jumper,

[0042] said first axis and said second axis are different.

[0043] 18. Watch calendar system (100) according to claim 17, characterized in that said month cam (22) is adapted so that:

[0044] - at least one first position of said month cam (22) allows the retraction of said second element (12) for driving said date jumper by action of said first element (32) for driving said date jumper, and

[0045] - at least one second position of said month cam (22) prohibits the retraction of said second element (12) for driving said date jumper by action of said first element (32) for driving said date jumper, by direct contact of said month cam (22) with said second element (12) for driving said date jumper.

[0046] 19. Watch calendar system (100) according to any one of claims 17 or 18, characterized in that it comprises a month display member, said month display member and said month cam (22) forming a single member (24).

[0047] 20. Watch calendar system (100) according to any one of claims 17 to 19, characterized in that said second element (12) for driving said date jumper comprises a lever pivoting about a third axis (A12) on said date jumper (1).

[0048] 21. Watch calendar system (100) according to proposal 20, characterized in that the pivoting amplitude of the lever 12 around the third axis (A12) is about 7° or about 0.5 mm, at the level of the configuration (12b) such as a pin (12b) of the second element (12) for driving the date mobile in contact with the month cam (22).

[0049] 22. Watch calendar system (100) according to any one of proposals 17 to 21, characterized in that it comprises:

[0050] - a first element (11a) such as a pin for limiting the movement of the second element (12) for driving the date mobile relative to the date mobile (1), and

[0051] - a second element (12c) such as an opening for limiting the movement of the second element (12) for driving the date mobile relative to the date mobile (1),

[0052] the first and second limiting elements cooperating with each other.

[0053] 23. Watch calendar system (100) according to any one of proposals 17 to 22, characterized in that it is an annual or semi-ten thousand year or ten thousand year calendar system.

[0054] 24. Watch calendar system (100) according to any one of proposals 17 to 23, characterized in that it comprises energy accumulation and recovery means so as to constitute an instantaneous jump calendar system, the energy accumulation and recovery means comprising an energy accumulator (4) and a cam (33).

[0055] 25. Watch calendar system (100) according to any one of proposals 17 to 24, characterized in that it comprises a mobile (3) for driving the date mobile (1), the driving mobile comprising a first element (32) for driving the date mobile (1) and a third element (31) for driving the date mobile (1).

[0056] 26. Watch calendar system (100) according to proposals 24 and 25, characterized in that it comprises the cam (33).

[0057] 27. Watch calendar system (100) according to any one of propositions 17 to 26, characterized in that the mobile (3) for driving the date mobile (1) pivots around a third axis (A3) different from the first axis (Al) and the second axis (A2), in particular parallel to the first axis (Al) and the second axis (A2).

[0058] 28. Watch calendar system (100) according to any one of propositions 17 to 27, characterized in that the system comprises:

[0059] - a third element (31) for driving the date mobile, such as a finger or a pin,

[0060] - a fourth element (la) for driving the date mobile, the fourth element (la) comprising, for example, teeth (la) for driving the date mobile, in particular external teeth (la) for driving the date mobile.

[0061] 29. Watch calendar system (100) according to any one of propositions 17 to 28, characterized in that the system comprises a frame (99) and that the first axis and the second axis are fixed axes relative to the frame (99).

[0062] 30. Watch calendar system (100) according to any one of propositions 17 to 29, characterized in that the system is arranged so that the second element (12) for driving the date mobile is free to stretch.

[0063] 31. Watch calendar system (100) according to any one of propositions 17 to 30, characterized in that the system is arranged so that the second element (12) for driving the date mobile acts directly by contact with the month cam (22).

[0064] 32. Watch calendar system (100) according to any one of propositions 17 to 31, characterized in that the system comprises a month mobile (2) comprising:

[0065] - a month indicator disc (23), and

[0066] - the month cam (22),

[0067] the month indicator disc and the month cam forming a monobloc assembly obtained by machining a whole block or by fixing the month indicator disc and the month cam, in particular by gluing and / or welding and / or brazing,

[0068] and / or

[0069] said month cam has an annular shape,

[0070] and / or

[0071] said indicator disc (23) is inscribed in a first cylinder having a diameter D1, said cam (22) is inscribed in a second cylinder having a diameter D2, and said cam has an opening (221 ) in which a third cylinder having a diameter D3 can be inscribed, said diameters D1, D2 and D3 being such that:

[0072] D2 < D1, in particular D2 < 0.9 x D1, and

[0073] D2 > D3, in particular D2 > D3 > 0.5 x D2, in particular D2 > D3 > 0.8 x D2.

[0074] 33. A timepiece movement (200) comprising a system according to any one of claims 17 to 32.

[0075] 34. A timepiece (300), in particular a watch, comprising a system (100) according to any one of claims 17 to 32 and / or a timepiece movement according to claim 33.

[0076] 35. A method of operating a timepiece calendar system (100) according to any one of claims 17 to 32 or a timepiece movement (200) according to claim 33 or a timepiece (300) according to claim 34, said method comprising the steps of:

[0077] positioning said month cam (22) in a first position and using said first element (32) for driving said date mobile to act on said second element (12) for driving said date mobile, and

[0078] positioning said month cam (22) in a second position and using said first element (32) for driving said date mobile to act on said second element (12) for retracting said second element (12) for driving said date mobile without driving said date mobile.

[0079] 36. An indicator mobile (2) for a timepiece calendar system (100), in particular a month indicator mobile (2), said indicator mobile (2) comprising:

[0080] - an axis (A2),

[0081] - an indicator disc (23), and

[0082] - a cam (22),

[0083] said indicator disc and said cam form an integral assembly, said integral assembly being obtained by machining a whole block or by fixing said indicator disc and said cam, in particular by gluing and / or welding and / or brazing,

[0084] and / or

[0085] said cam has an annular shape,

[0086] and / or

[0087] said indicator disc (23) is inscribed in a first cylinder having a diameter D1, said cam (22) is inscribed in a second cylinder having a diameter D2, and said cam has an opening (221 ) in which a third cylinder having a diameter D3 can be inscribed, said diameters D1, D2 and D3 being such that:

[0088] D2 < D1, in particular D2 < 0.9 x D1, and

[0089] D2 > D3, in particular D2 > D3 > 0.5 x D2, in particular D2 > D3 > 0.8 x D2.

[0090] Any object according to the first aspect of the application can be combined with any object according to the second aspect of the application, unless there is a technical or logical incompatibility. BRIEF DESCRIPTION OF DRAWINGS

[0091] The attached drawings represent, by way of example, one embodiment of a timepiece according to the application.

[0092] Figure 1 is a view of one embodiment of a timepiece according to the application.

[0093] Figure 2 is a view of a calendar system used in this embodiment of a timepiece according to the application.

[0094] Figure 3 is a view of a calendar drive system used in this embodiment of a timepiece according to the application.

[0095] Figure 4 is an exploded perspective view of a drive mobile used in this embodiment of a timepiece according to the application.

[0096] Figure 5 is an axial sectional view of a month mobile used in this embodiment of a timepiece according to the application.

[0097] Figure 6 is a view of the calendar system for April 30th just before midnight.

[0098] Figure 7 This is a view of the calendar system during the first jump phase when the display jumps from April 30 to May 1.

[0099] Figure 8 Is the calendar system in its Figure 7 Detailed view of the morphology showing the interaction of the day mobile and the month mobile in detail.

[0100] Figure 9 This is a view of the calendar system in the second jump phase when the display jumps from April 30 to May 1.

[0101] Figure 10 This is a view of the calendar system just before the display jumps from April 30 to May 1.

[0102] Figure 11 This is a view of the calendar system in the first jump phase when the display jumps from May 30 to May 31.

[0103] Figure 12 Is the calendar system in its Figure 11 A detailed view of the pattern detailing the interaction of the day mobile and the month mobile.

[0104] Figure 13 This is a view of the calendar system in the second jump phase when the display jumps from May 30 to May 31. DETAILED DESCRIPTION

[0105] References below Figures 1 to 13 One embodiment of a timepiece is described.

[0106] Timepiece 300 is for example a watch, in particular a wristwatch.Timepiece 300 comprises a timepiece movement 200 intended to be mounted in a timepiece case or housing so as to protect it from the external environment.

[0107] The timepiece movement 200 is a mechanical movement, in particular an automatic movement, or a hybrid movement or an electronic movement.

[0108] The watch movement 200 includes a watch calendar system 100. The watch calendar system 100 is preferably an instantaneous jump system. The calendar system can be a simple calendar system, an annual calendar system, a semi-perpetual calendar system, or a perpetual calendar system.

[0109] According to a first aspect, a timepiece calendar system 100 comprises:

[0110] - an energy accumulation and recovery device comprising an energy accumulator 4 and a cam 33,

[0111] - a date mobile 1,

[0112] - a month mobile 2,

[0113] - a first indexing element 7 for indexing the date mobile 1,

[0114] - a second indexing element 8 for indexing the month mobile 2,

[0115] - a drive mobile 3 for driving the date mobile by recovering energy from the energy accumulator 4, and

[0116] - an element 6b for driving the month mobile by recovering energy from the energy accumulator 4,

[0117] The element 6b for driving the month mobile is arranged and / or configured to limit the movement of the month mobile after driving the month mobile.

[0118] According to a second aspect, the watch calendar system 100 comprises:

[0119] - a date mobile 1 pivoting about an axis Al,

[0120] - an element 32 for driving the date mobile, such as a finger 32,

[0121] - an element 12 for driving the date mobile, the element 12 comprising for example a tooth 12a for driving the date mobile, the driving element 12 being mounted on the date mobile 1 so as to be movable between a retracted position and a driving position, and

[0122] - a month cam 22 pivoting about an axis A2,

[0123] The month cam 22 is adapted to cooperate with the element 12 for driving the date mobile, so that depending on the position of the month cam 22, the month cam 22 allows or prohibits the retraction of the element 12 for driving the date mobile, in particular by the action of the element 32 for driving the date mobile, the first axis Al and the second axis A2 being different.

[0124] The month cam 22 advantageously makes it possible for:

[0125] - at least one first position of the month cam 22 allows the retraction of the element 12 for driving the date mobile by the action of the element 32 for driving the date mobile, and

[0126] - at least one second position of the month cam 22 prohibits the retraction of the element 12 for driving the date mobile by the action of the element 32 for driving the date mobile, by direct contact of the month cam 22 with the element 12 for driving the date mobile.

[0127] In this implementation, the date mover 1 is located at the center of the calendar system 100 or of the calendar module or of the movement 200 comprising the calendar system 100 along an axis Al. The date mover 1 comprises a wheel 11 having 31 teeth la and a lever 12 mounted to rotateably move or move about an axis A12 on the wheel 11 as shown in Figure 1 and Figure 2 The lever 12 constitutes a driving element 12 mounted on the date mover 1 to move between a retracted position (shown in Figure 11 and Figure 12 ) and a driving position (shown notably in Figure 7 and Figure 8 ). At the level of a formation 12b of the lever 12 intended to come into contact with the month cam, such as a pin 12b, the lever 12 pivots about the axis A12 by an amplitude of about 7° or about 0.5 mm. To limit this amplitude, the system preferably comprises:

[0128] - an element 11a, such as a pin, for limiting the movement of the lever 12 relative to the date mover 1, and

[0129] - an element 12c, such as an opening, for limiting the movement of the lever 12 relative to the date mover 1,

[0130] These limiting elements 11a and 12c cooperate with each other to limit the movement of the lever 12 relative to the wheel 11.

[0131] The lever 12 is designed to cooperate directly with the month mover 2 pivoting about an axis A2, in particular with a month programming cam 22 mounted on or fixed to a month pinion 21 as shown in Figure 2 The month cam 22 comprises a circular portion 22a and radial protrusions 22b. Each of these radial protrusions 22b is configured and / or adapted to act as an abutment against a formation 12b of the lever 12.

[0132] The direct cooperation between the lever 12 and the month cam 22, in particular the contact between the pin 12b and the protrusion 22b, makes it possible for the calendar to be driven by an additional step at the end of a month having 30 days or possibly a month having less than 30 days, i.e. the month of February, as described below.

[0133] Advantageously, the lever 12 is adapted so that the formation 12b moves substantially orthoradially relative to the axis Al or forms an angle of less than 45° with the direction orthoradial to the axis Al during retraction of the lever 12.

[0134] The mobiles 1 and 2 are instantaneously driven, in particular as a result of the action of driving the mobile 3. The mobile 3 pivots about an axis A3. The mobile 3 makes a complete revolution about its axis A3 every 24 hours. The mobile 3 comprises an element 31, such as a finger or a pin 31, designed to drive the mobile 1 by one angular step every 24 hours by cooperation with the contact of one tooth la of the wheel 11. The mobile 3 also comprises a driving element 32 designed to exert an action on the lever 12, in particular on the tooth 12a of the lever, at the end of each month. This action has the following effects, as described below:

[0135] - retraction of the lever 12 at the end of a large month, and

[0136] - driving of the mobile 1 at the end of a small month.

[0137] The jump is instantaneous since the energy accumulator 4 is designed to cooperate with the cam 33 of the mobile 3. The accumulator 4 comprises a lever 41 biased on the cam 33 by a spring 42. The lever 41 and the spring 42 can be obtained by permanently assembling several parts, or can be made in a single piece (by shaping a single block of material) so as to form a single component 4. The cooperation between the lever 41 and the cam 33 is preferably achieved via a roller 43 mounted in rotatable movement on a portion, in particular an end, of the lever 41.

[0138] The mobile 3 also comprises a wheel 34 enabling the mobile 3 to be connected to the base movement via a suitable kinematic chain, in particular an hour wheel (not shown), in particular by engaging with the mobile 3. The fingers 31, 32 and the cam 33 are advantageously connected to this wheel 34 via a one-way connection device 35. This device comprises a resilient pawl 36 connecting the wheel 34 to a disc 37 on which the fingers 31, 32 are mounted. In particular, the resilient pawl 36 acts on a formation of the wheel 34 and on a formation of the disc 37 so as to cause a counterclockwise rotation of the elements 31, 32, 33 as a result of the action of the counterclockwise rotation of the wheel 34. When the wheel 34 is driven in the clockwise direction, the elements 31, 32, 33 are not driven and remain in place as a result of the action of the lever 41 and its spring 42 acting on the cam 33.

[0139] In the embodiment shown, the disc 37 also comprises a guide member 38, such as a finger 38, designed to drive the week mobile 5 by one angular step every 24 hours by cooperation with the contact of one tooth or star wheel 51 of the wheel 5a comprising seven teeth.

[0140] Thus, the mobile 3 is designed to instantaneously drive:

[0141] - the date mobile 1, once a day or once every 24 hours,

[0142] - the week mover 5, once a day or once every 24 hours, and

[0143] - the month mover 2, once a month.

[0144] The month mover 2 is connected to the date mover 1 by a particularly simple kinematic chain, which consists of an intermediate mover 6 comprising a wheel 61 having 31 teeth 6a meshing with the 31 teeth 1a of the wheel 11 and a finger 6b designed to drive the mover 2 by one angular step by contact with one tooth 2a of a pinion 21 fixed to the month cam 22.

[0145] Each of the movers 1, 2, 5 is preferably indexed in position by a respective indexing element or positioning rod 7, 8, 9, which makes it possible to retain the date, week and month indicator members in the display. The positioning rod 7 cooperates with the teeth 1a of the date mover. The positioning rod 8 cooperates with the teeth 2a of the month mover. The positioning rod 9 cooperates with the teeth 51a of the wheel or with the star wheel 51.

[0146] The date indicator member can be a central hand 13 and the month and week indicator members can be discs 23 and 53 as shown in Figure 1

[0147] The cam 22 and the disc 23 preferably form a single part 24. In other words, the circular portion 22a and the radial protrusion 22b are made or formed directly under the disc 23 on the side opposite the side having the month indication. The circular portion 22a is optional. Thus, it is possible to have only the radial protrusion 22b made or formed directly on the disc 23.

[0148] Moreover, the annual calendar system is particularly simple and compact, its kinematic chain comprising only:

[0149] - the intermediate mover 6, and

[0150] - the cam 22 and the month indicator member 23 simplified into a single part 24.

[0151] In an alternative embodiment, it is possible to envisage mounting the finger 6b directly on the mover 1, so that the mover 1 is able to drive the month mover 2 directly, without the intermediate mover 6.

[0152] This arrangement is possible because the cam 22 pivoting about the axis A2 is eccentric with respect to the date mover 1 pivoting about the axis Al. In other words, the cam 22 is off-axis or eccentric with respect to the date mover 1, the lever 12 designed to cooperate with the cam 22 being mounted mobile or movable on the date mover 1, which has the advantage of the cohabitation of the date indicator and the month indicator in the simplest possible manner. ​

[0153] Moreover, the jumps of these members are preferably instantaneous and synchronized thanks to the energy accumulator 4, the mobile 3 and the finger 6b. As mentioned above, the finger 6b is adapted and / or configured to limit the movement of the month mobile 2 after the driving of the month mobile 2. To this end, the finger 6b is configured and / or adapted to constitute an abutment of the pinion 21 after the date change. To this end, the finger 6b comprises a surface 61b forming an abutment of the month mobile 2. Indeed, after the tooth 2a of the tooth 21 has been driven, the finger 6b is fixed in position for 24 hours at a position where the finger 6b, and in particular the surface 61b, constitutes an abutment for limiting the movement of the month mobile 2 by cooperating with the surface 21a of the month mobile 2. Thus, the surface 61b constitutes an abutment of the tooth of the tooth 21 just after the tooth that has just been driven, and in particular of the surface 21a of this tooth. This operating principle thus makes it possible to minimize the torque for retaining the positioning stem 8 while avoiding all risk of an accidental additional jump of the month display member after the date change. By integrating the cam 22 and the member 23 in the same part 24, it is possible both to minimize this retention torque and to simplify the month mobile 2 as much as possible. Thus, it is possible to reduce the mobile 2 to two parts, namely the pinion 21 which is indexed in position by the positioning stem 8 and the part 24 which integrates the display member 23 and the month programming cam 22. It is thus possible to size the calendar system so that the position retention torque of the month mobile generated by the element 8 for indexing the month mobile 2 is 1 / 2 or 1 / 1.5 of the torque for retaining the date mobile in position generated by the element 7 for indexing the date mobile.

[0154] In a similar manner to the finger 6b, the element 38 for driving the week mobile can be adapted and / or configured to limit the movement of the week mobile 5 after the driving of the week mobile 5 by one angular step.

[0155] An embodiment of a method of operating the above-described watch calendar system 100 or the above-described watch movement 200 or the above-described watch 300 is next described.

[0156] The method comprises the following steps:

[0157] - positioning the month cam 22 in a first position and using the element 32 for driving the date mobile to act on the second element 12 for driving the date mobile in order to drive the date mobile, this step occurring at the end of a short month (April, June, September, November), and

[0158] - positioning the month cam 22 in the second position and using the element 32 for driving the date mover to act on the element 12 for driving the date mover so as to retract the element 12 for driving the date mover without driving the date mover, this step occurring at the end of a long month (January, March, May, July, August, October, December).

[0159] Figure 6 The watch system represents April 30th just before midnight, i.e. just before the calendar indication jump. In this configuration, the roller 43 is located at the top 33a of the cam 33. Thus, the energy accumulator 4 is ready to restore the accumulated energy at midnight so as to generate the rotation of the fingers 31, 32, in which the fingers 31, 32 are constrained to rotate with the cam 33.

[0160] Figure 7 The calendar system represents during the first phase of the calendar indication jump. Knowing that April is a month comprising 30 days, the pin 12b is designed to rest against the protrusion 22b of the month programming cam 22, thanks to the action of the teeth 32 on the teeth 12a, which can be seen more particularly in Figure 8 . The rest of the pin 12b against the protrusion 22b prevents the rotation of the lever around the axis A12 and thus generates the rotation of the mover 1 around the axis Al by one angular step.

[0161] Figure 9 The calendar system represents during the second phase of the calendar indication jump. The finger 31 drives the teeth 1A of the wheel 11 so that the mover 1 turns around the axis Al by one complementary angular step. During this phase, the mover 6 also turns around the axis A6 by one angular step, thus the finger 6b drives the teeth 2a of the month mover 2 and thus allows the rotation of the mover 2, in particular of the cam 22 and of the display member 23, by one angular step.

[0162] During the first phase, the finger 32 exerts a force on the positioning rod 7 until the positioning rod 7 restores the energy accumulated by its return spring. During the second phase, the finger 31 exerts a force on the positioning rod 7 and on the positioning rod 8 (and on the positioning rod 9 if the calendar system comprises a week display device) until they restore the energy accumulated by their respective return springs. As mentioned above, the torque generated by the positioning rod 8 on the mover 2 is 1 / 2 or 1 / 1.5 of the torque generated by the positioning rod 7 on the mover 1. Such a choice makes it possible to minimize the energy accumulated by the accumulator 4 and thus to minimize the variation of the amplitude of the oscillator of the movement driving the calendar system. This choice is advantageous because the cam 22 is integrated into the member 23 (these elements forming a single part 24) so that the inertia of the mover 2 is minimized.

[0163] As mentioned above, in order to make the operation of the calendar system reliable, in particular to prevent any risk of an accidental additional jump, the finger 6b is designed to remain in the tooth 2a of the mobile 2 once the date jump has been achieved. In this configuration, the finger 31 is also in the tooth la of the wheel 11 and the roller 43 is in the recess 33b of the cam 33.

[0164] Figure 10 Calendar system representing May 1st just after midnight, i.e. just after a calendar indication jump. The roller 43 is in the recess 33b of the cam 33, while the finger 6b is in the tooth 2a and thus constitutes an abutment against which the tooth 2a (the tooth following the one just driven) can abut.

[0165] Figures 11 to 13 Calendar system representing the transition from May 30th to May 31st. In this configuration, the finger 32 is in the tooth 12a of the lever 12, while the finger 31 is in the tooth la of the wheel 11. The roller 43 is in the recess 33b of the cam 33, while the finger 6b is in the tooth 2a and thus constitutes an abutment against which the tooth 2a (the tooth following the one just driven) can abut. Figure 11 and Figure 12 During the first phase of the calendar indication jump depicted, the contact between the finger 32 and the tooth 12a retracts the lever 12 about the axis A12, since the pin 12b can move freely facing the circular portion 22a of the month programming cam 22. Thus, the mobile 1 is not driven to rotate about the axis Al. Only when the finger 31 comes into contact with the tooth la of the wheel 11, the mobile 1 can be driven about the axis Al by one angular step, thus generating the date change from May 30th to May 31st. As mentioned above, the circular portion 22a is thus optional.

[0166] In any embodiment or variant, the display member 23 is preferably a disc on which at least the abutment 22b (the portion 22a being optional in the running of the calendar) can be machined or mounted.

[0167] In any embodiment or variant, the month date display member is preferably a pointer 13, which makes it possible to minimize the inertia of the mobile 1. Alternatively, the member 13 can take the form of a disc.

[0168] In any embodiment or variant, the indication of other time information is optional. This can for example be the indication of the day of the week depicted. Additionally or alternatively, there can for example be a lunar phase indication. In the particular case of displaying the day of the week represented in the figures, after a date change, the finger 38 constitutes an abutment of the pinion 51, in particular of the tooth 5a as shown in Figure 2 Thus, this operating principle makes it possible to minimize the torque to hold the positioning lever 9, while preventing any risk of an accidental additional jump of the day of the week display member after a date change.

[0169] In any embodiment or variant, the month mover and / or the week mover can comprise a pinion with single teeth (as is the case for pinion 21 represented in the figures) or a pinion with double teeth (as is the case for pinion 51 represented in the figures). In the latter case, making the teeth double can optimize the respective function of each set of teeth. For example, teeth 5a comprise teeth 51a comprising a series of grooves to cooperate as best as possible with the fingers 38 of the mover 3, and teeth 51b forming a star to cooperate optimally with the positioning rod prong 9.

[0170] In any embodiment or variant, the mover 1 (and the lever 12) is preferably directly driven by the elements 31 and 32, thus independently of any intermediate lever.

[0171] In any embodiment or variant, the date mover 1 can pivot around a first axis Al, the month mover 2 can pivot around a second axis A2, and the drive mover 3 can pivot around a third axis A3, the first axis Al, the second axis A2 and the third axis A3 preferably being different.

[0172] In any embodiment or variant, the first axis Al is preferably at the center of the calendar system 100 and / or at the center of the watch movement 200 and / or at the center of the watch 300.

[0173] In any embodiment or variant, the watch calendar system 100 can comprise a frame 99, and the first and second axes can be fixed axes relative to the frame 99. In particular, the date wheel 1 can pivot directly on the frame 99, and the month cam can pivot directly on the frame 99.

[0174] In any embodiment or variant, the watch calendar system 100 can be arranged so that the second element 12 for driving the date mover is free to retract. By "free to retract" is meant that the calendar system has no spring acting on it to retract the second date wheel driving element 12.

[0175] In any embodiment or variant, the watch calendar system 100 can be arranged so that the second element 12 for driving the date mover directly acts by contact with the month cam 22.

[0176] In any embodiment or variant, the mover 2, in particular the month mover 2, comprises:

[0177] - an indicator disc, in particular a month indicator disc 23, and

[0178] - a cam, in particular a month cam 22.

[0179] The mover 2 can comprise any combination of the following features:

[0180] - the indicator disc and the cam can form an integral assembly, obtained by machining a whole block or by fixing the month indicator disc and the month cam, in particular by gluing and / or welding and / or brazing. In some embodiments, the indicator disc and the cam can be made of different materials.

[0181] - the cam can have an annular shape.

[0182] - the indicator disc 23 can be inscribed in a first cylinder having a diameter D1, the cam 22 can be inscribed in a second cylinder having a diameter D2, and the cam can have an opening 221 in which a third cylinder having a diameter D3 can be inscribed, the diameters D1, D2 and D3 being such that:

[0183] D2 < D1, in particular D2 < 0.9 x D1, and

[0184] D2 > D3, in particular D2 > D3 > 0.5 x D2, in particular D2 > D3 > 0.8 x D2.

[0185] - the cam 22 can be an annual month cam (12-month cam, which makes a complete revolution in 12 months).

[0186] - the cam 22 can be arranged to rotate unidirectionally about its axis A2 relative to the frame 99, as can the other discs of the calendar system.

[0187] The month-date indication and the month indication (and possibly the week indication and the lunar phase indication) can be corrected via a stem or by a dedicated corrector.

[0188] Throughout the application, "instantaneous jump" preferably means a jump with a duration of a fraction of a second, typically a duration of about a hundredth of a second or of about a twenty-fifth of a second or again of about a tenth of a second.

[0189] In other words, the above-described solution is remarkable in that:

[0190] - the month display member is instantaneously driven by the recovery of the energy accumulated by the energy accumulator and the calendar cam, the calendar being simple, annual or perpetual, which makes it possible to obtain a limitation to complete calendars of particularly high performance,

[0191] - the month programming cam is eccentric relative to the date mover, which makes it possible to obtain a limitation to annual or perpetual calendars that are particularly compact. The cam is advantageously included in the month display member, which makes it possible to further improve compactness while minimizing the inertia of the month mover.

[0192] The solution is also remarkable for the fact that the device able to distinguish between small and large months is further simplified compared to the chain-controlled track device known from application EP3567438A1, while being particularly compact due to the eccentricity of the month programming cam with respect to the date mover, and even more so since the date mover is contained in the month display member.

[0193] The solution is simpler than the one described in application EP3567438 due to the fact that the tooth or lever, which is movably or moveably mounted on the date mover, cooperates directly with a month programming cam which is eccentric (or off-axis) with respect to the date mover, independently of any cam follower. Such a month programming cam arrangement can simplify the chain connecting the date mover to the mover supporting the programming cam, in particular making the chain more compact, in particular with respect to the chain known from application CH685585.

[0194] Of course, in the present text, the expression "a certain element is inscribed in a cylinder having a diameter D" means that the diameter D is the smallest diameter which contains the element in the cylinder. Likewise, in the present text, the expression "a cylinder having a diameter D is inscribed in a certain element" means that the diameter D is the largest diameter which contains the cylinder in the element.

Claims

1. An instantaneous jump clock calendar system (100), comprising: - an energy accumulation and recovery device comprising an energy accumulator (4) and a cam (33), - Date moving piece (1), - Month moving piece (2), - a first indexing element (7) for indexing the date mobile (1), - a second indexing element (8) for indexing the months mobile (2), - a driving mobile (3) for driving the date mobile by recovering energy from the energy accumulator (4), and - an element (6b) for driving the months mobile by recovering energy from the energy accumulator (4), The element (6b) for driving the months mobile is arranged and / or configured to limit the movement of the months mobile after driving the months mobile.

2. The clock and calendar system (100) according to claim 1, characterized in that: The second indexing element (8) of the month mobile (2) generates a torque for keeping the month mobile (2) in a tensioned state, which is 1 / 2 or 1 / 1.5 of the torque generated by the first indexing element (7) of the date mobile (1) for keeping the date mobile (1) in an appropriate position.

3. The clock and calendar system (100) according to any one of claims 1 or 2, characterized in that: The first indexing element is a positioning rod (7) that cooperates with the tooth (1a) of the date moving member.

4. The clock and calendar system (100) according to any one of claims 1 to 3, characterized in that: The second indexing element is a positioning rod (8) that cooperates with the tooth (2a) of the month moving member.

5. The clock and calendar system (100) according to any one of claims 1 to 4, characterized in that: The drive mobile (3) comprises a first finger (31), such as a pin, adapted to cooperate by contact with a tooth (1a) of the date mobile.

6. The clock and calendar system (100) according to any one of claims 1 to 5, characterized in that: The drive mobile (3) comprises a second finger (32) adapted to cooperate by contact with an additional tooth (12b) of the date mobile.

7. The clock and calendar system (100) according to any one of claims 1 to 6, characterized in that: The driving moving member (3) includes the cam (33).

8. The clock and calendar system (100) according to any one of claims 1 to 7, characterized in that: The date mobile (1) pivots around a first axis (A1), the month mobile (2) pivots around a second axis (A2), and the drive mobile (3) pivots around a third axis (A3), the first axis (A1), the second axis (A2) and the third axis (A3) being different.

9. The clock and calendar system (100) according to claim 8, characterized in that: The first axis (A1) is located at the center of the calendar system (100) and / or at the center of the timepiece movement (200) and / or at the center of the timepiece (300).

10. The clock and calendar system (100) according to any one of claims 1 to 9, characterized in that: The element (6b) for driving the months mobile comprises a third finger (6b) adapted to cooperate by contact with a tooth (2a) of the months mobile.

11. The clock and calendar system (100) according to any one of claims 1 to 10, characterized in that: The element (6b) for driving the months mobile comprises a first surface (61b) forming an abutment portion of the months mobile (2), this surface (61b) being adapted to limit the movement of the months mobile (2) by cooperating with a second surface (21a) of the months mobile (2).

12. The clock and calendar system (100) according to any one of claims 1 to 11, characterized in that: The system comprises: - day moving piece (5), - a third indexing element (9) for indexing the day mobile (5), - a third element (38) for driving the day mobile by recovering energy from the energy accumulator (4).

13. The clock and calendar system (100) according to any one of claims 1 to 12, characterized in that: The third element (38) for driving the day mobile is adapted and / or configured to limit the movement of the day mobile after driving the day mobile.

14. The clock and calendar system (100) according to any one of claims 1 to 13, characterized in that: The system is a simple calendar system or an annual calendar system or a semi-perpetual calendar system or a perpetual calendar system.

15. A timepiece movement (200) comprising a system according to any one of claims 1 to 14.

16. A timepiece (300), in particular a watch, comprising a system (100) according to any one of claims 1 to 14 and / or a timepiece movement according to claim 15.

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