Timepiece calendar system

Abstract

To provide a simple and compact timepiece calendar system which is compatible with an annual, semi-perpetual or perpetual calendar system.SOLUTION: A timepiece calendar system 200 comprises: a date mobile 4 which is displaceable step by step relative to a frame 199; a first drive finger for driving the date mobile 4; a first tooth 51 for driving the date mobile 4, the first tooth 51 being mounted on the date mobile 4 so as to be displaceable between a deactivated, or retracted, position and an activated, or drive, position; and activation systems 6, ) for activating the first tooth 51. The first drive finger and the first tooth are arranged such that a single action of the first drive finger on the first tooth can displace the date mobile 4 through N steps, wherein N is an integer such that N>1, notably N=2 or N=3.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a clock calendar system. The invention also relates to a clock movement comprising such a clock calendar system. The invention further relates to a clock comprising such a clock movement or such a clock calendar system. The invention further relates to a method for operating such a clock calendar system or such a clock movement or such a clock. The invention finally relates to a transmission system which such a clock calendar system or such a clock movement or such a clock may comprise. [Background technology]

[0002] Patent document 1 discloses an embodiment of a calendar system, particularly an annual calendar system, including a drive mechanism provided with a single and unique drive mechanism. The drive mechanism includes a first protrusion arranged to activate one of the 31 teeth on the date disc, enabling a first jump of the date disc and thus allowing the date to be changed regardless of the date of the month, and an additional protrusion angularly offset from the first protrusion arranged to activate a tooth on a protrusion movably mounted on the date disc to enable a supplementary jump of the date disc at the end of months with fewer than 30 days. Advantageously, the drive mechanism includes a calendar cam and an elastic lever. The interaction between the cam and the lever allows for instantaneous rotation of the drive mechanism, thereby allowing the date to be changed instantly regardless of the number of jumps the date disc performs.

[0003] Patent document 2 similarly discloses a drive provided with a single, independent drive armature, particularly in a perpetual calendar system. This solution is difficult to implement with instantaneous jump drives, since the displacement performed by the drive armature must be maximized to allow multiple jumps of the date wheel when the virtual elastic lever is unwound. The winding of the elastic lever, which should also be maximized, is carried out over a limited displacement of the drive armature, which leads to abrupt torque fluctuations that can result in a reduction in the amplitude of the oscillator, particularly of a balance-spring oscillator.

[0004] It is therefore necessary to define an instantaneous jump drive that is compact yet allows for a maximum reduction in the energy losses of the oscillator, and is particularly suitable for implementing semi-perpetual or perpetual calendars.

[0005] Patent document 3 discloses a first drive armature with a fixed axis of rotation relative to the frame and a second drive armature with a displaceable axis of rotation relative to the same frame, where a drive lug of the second armature is adapted to drive a tooth fixed to the date disc. In this design, the second armature is mounted on a lever displaceable relative to the frame against a return spring, which consumes more energy than necessary, which is incompatible with the implementation of an instantaneous jump drive.

[0006] Patent Document 4 discloses a calendar system including a first drive moving part with a rotation axis fixed relative to the frame and a second drive moving part with a rotation axis fixed relative to the same frame, where the drive lug of the second moving part is adapted to drive an additional tooth fixed to the date wheel. To implement the calendar system described in Patent Document 4, the lug of the second moving part is displaceably mounted against a month programming cam arranged coaxially with the second moving part under the influence of a return spring. On the one hand, the return spring leads to excessive energy consumption, thereby causing torque fluctuations throughout the day, which is incompatible with the implementation of an instantaneous jump drive. On the other hand, the month programming cam is particularly bulky, which leaves a very small area for the installation of the calendar cam and elastic lever in the drive. Furthermore, the installation of the month programming cam arranged coaxially with the second moving part at least partially determines the positioning of the axis of the second moving part relative to the frame, which can be a limiting factor in optimizing the drive of the date wheel under the action of the drive lug of the second moving part. Finally, the protrusion performs a complete rotation around the lunar programming cam every day, which can lead to premature wear of the drive, especially if the second protrusion is elastically returned against the cam under the influence of the return spring. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] European Patent Application Publication No. 3567438 [Patent Document 2] Swiss Patent Application Publication No. 680630 [Patent Document 3] European Patent Application Publication No. 0987609 [Patent Document 4] Swiss Patent Application Publication No. 710109 [Patent Document 5] European Patent Application Publication No. 3483663 Summary of the Invention [Problem to be solved by the invention]

[0008] The object of the present invention is to provide a clock calendar system that improves on the systems known from the prior art and solves the problems mentioned above. In particular, the present invention proposes a simple and compact clock calendar system that works better and is compatible with annual, semi-perpetual or perpetual calendar systems. [Means for solving the problem]

[0009] According to a first aspect of the invention, the subject matter is defined by the following propositions.

[0010] 1. A clock calendar system (200) comprising: a date moving part (4) displaceable in one step relative to the frame (199); A first driving projection (21) that drives the date moving part (4); a first tooth (51) for driving the date moving part (4), the first tooth (51) being mounted on the date moving part (4) so ​​as to be displaceable between a stopped or retracted position and an activated or driven position; an actuation system (6, 7) for actuating the first tooth (51); Including, the first drive lug (21) and the first tooth (51) are arranged in such a way that a single movement of the first drive lug (21) relative to the first tooth (51) can displace the date moving part (4) through N steps, where N is an integer greater than 1, in particular N=2 or N=3; Clock calendar system (200).

[0011] 2. The actuation system (6, 7) is arranged so that a single movement of the first drive lug (21) on the first tooth (51) displaces the date moving part (4) through n steps, where n is an integer between 1 and N, depending on the moment when the first tooth (51) is actuated by the actuation system (6, 7). The clock calendar system (200) according to proposal 1.

[0012] 3. The actuation system (6, 7) is a desmodromic system (6, 7) including a lunar cam (7) and a cam follower (6), the desmodromic system being arranged such that at least a first position of the lunar cam (7) defines a first position of the follower (6) that allows the first tooth (51) to retract, and at least a second position of the lunar cam (7) defines a second position of the follower (6) that prevents the first tooth (51) from retracting. A clock-calendar system (200) according to proposal 1 or 2.

[0013] 4. The month cam (7) and the date moving part (4) are coaxial. The clock calendar system (200) according to proposal 3.

[0014] 5. A second drive lug (11) for driving the date moving part (4), in particular the second drive lug (11) arranged to interact with the tooth row (41) of the date moving part (4), in particular the tooth row (41) having 31 teeth; A clock-calendar system (200) according to any one of proposals 1 to 4.

[0015] 6. The first driving protrusion (21) forms a part of a first driving movable part (2), and the second driving protrusion (11) forms a part of a second driving movable part (1), and the first driving movable part (2) and the second driving movable part (1) preferably comprise separate first and second rotation axes (A2 and A1), respectively. The clock calendar system (200) according to proposal 5.

[0016] 7. The first driving movable part (2) and the second driving movable part (1) are kinematically connected to each other by a third driving movable part (3). The clock calendar system (200) according to proposal 6.

[0017] 8. An instantaneous drive device (92, 96, 97), in particular comprising a spring-lever (97) and a calendar cam (96), in particular a calendar cam (96) arranged on the third drive moving part (3), A clock-calendar system (200) according to any one of proposals 1 to 7.

[0018] 9. The system includes a device (98) for holding the date moving part (4) in its position, and a device (93) for minimizing or nullifying the holding torque that holds the date moving part (4) in its position, the device (93) including in particular a cam (95) arranged on the second drive moving part (1); A clock-calendar system (200) according to any one of proposals 1 to 8.

[0019] 10. The first driving movable part (2) includes a third protrusion (23) that drives the day moving part. A clock-calendar system (200) according to any one of proposals 1 to 9.

[0020] 11. The system comprises a kinematic connecting element (8) arranged so that the date moving part (4) moves a month cam (7) forming part of the actuation system (6, 7) of the first tooth (51) through 1 / m steps for at least some steps taken by the date moving part (4), where m is a real number greater than 1 and preferably between 2 and 20; A clock-calendar system (200) according to any one of proposals 1 to 10.

[0021] 12. The system comprises a kinematic connecting element (8) arranged so that the date moving part (4) moves the month cam (7) forming part of the actuation system (6, 7) so that the month cam (7) is displaced before or during the jump from the 27th to the 28th day of each month, for example during the jump from the 26th to the 27th day. A clock-calendar system (200) according to any one of proposals 1 to 11.

[0022] 13. A clock movement (300) comprising a system (200) according to any one of proposals 1 to 12.

[0023] 14. A clock movement (400), in particular a wristwatch, comprising a system (200) according to any one of suggestions 1 to 12 and / or a clock movement (300) according to suggestion 13.

[0024] 15. A method of operating a clock calendar system according to any one of proposals 1 to 12, or a clock movement according to proposal 13, or a clock according to proposal 14, comprising: activating the first tooth (51); the single movement of the first drive lug (21) on the first tooth (51) can displace the date moving part (4) over an amplitude of up to N steps, where N is an integer greater than 1, in particular N=2 or N=3; A method comprising the steps of:

[0025] 16. The single movement of the first driving lug (21) on the first tooth (51) displaces the date moving part (4) through n steps, where n is an integer between 1 and N, depending on the moment when the first tooth (51) is actuated by the actuation system (6, 7). The operating method described in Proposition 15.

[0026] 17. When the first tooth (51) is activated, the first protrusion (21) subjects the first tooth (51) to a mechanical action that drives the date moving part (4), and / or when the first tooth is stopped, the first protrusion (21) subjects the first tooth (51) to a mechanical action that retracts the first tooth (51) without driving the date moving part (4); The operating method described in Propositions 15 or 16.

[0027] According to a second aspect of the invention, the subject matter is defined by the following propositions.

[0028] 18. A clock calendar system (200) comprising: a date moving part (4) displaceable in one step relative to the frame (199); A first driving projection (21) that drives the date moving part (4); a first tooth (51) for driving the date moving part (4), the first tooth (51) being mounted on the date moving part (4) so ​​as to be displaceable between a stopped or retracted position and an activated or driven position; an actuation system (6, 7) for actuating the first tooth (51); Including, the first drive lug (21) and the first tooth (51) are arranged in such a way that a single movement of the first drive lug (21) on the first tooth (51) displaces the date moving part (4) through n steps, where n is an integer of any value between 1 and N, where N is an integer greater than 1, in particular N=2 or N=3, depending on the moment when the first tooth (51) is activated by the activation system (6, 7); Clock calendar system (200).

[0029] 19. The actuation system (6, 7) is a desmodromic system (6, 7) including a lunar cam (7) and a cam follower (6), the desmodromic system being arranged such that at least a first position of the lunar cam (7) defines a first position of the follower (6) that allows the first tooth (51) to retract, and at least a second position of the lunar cam (7) defines a second position of the follower (6) that prevents the first tooth (51) from retracting. A clock-calendar system (200) as described in proposal 18.

[0030] 20. The month cam (7) and the date moving part (4) are coaxial. A clock calendar system (200) as described in proposal 19.

[0031] 21. A second drive projection (11) for driving the date moving part (4), in particular the second drive projection (11) arranged to interact with the tooth row (41) of the date moving part (4), in particular the tooth row (41) having 31 teeth; A clock-calendar system (200) according to any one of proposals 18 to 20.

[0032] 22. The first driving protrusion (21) forms a part of a first driving movable part (2), the second driving protrusion (11) forms a part of a second driving movable part (1), and the first driving movable part (2) and the second driving movable part (1) preferably comprise separate first and second rotation axes (A2) and (A1), respectively. A clock calendar system (200) as described in proposal 21.

[0033] 23. The first axis (A2) is arranged on a first circle, centered on the axis (A4) of the date moving part (4), and having a first radius (R2); the second axis (A1) is arranged on a second circle, centered on the axis (A4) of the date moving part (4), and having a second radius (R1); the first radius (R2) is preferably smaller than the second radius (R1), or 0.9 times smaller than the second radius (R1), or 0.8 times smaller than the second radius (R1); the teeth (41) of the date moving part (4) are preferably internal teeth, and the first teeth (51) are directed inward; A clock-calendar system (200) as described in proposal 22.

[0034] 24. The first driving movable part (2) and the second driving movable part (1) are kinematically connected to each other by a third driving movable part (3). A clock-calendar system (200) as described in proposal 23.

[0035] 25. The first drive projection (21) has a first head radius (RT2), and the second drive projection (11) has a second head radius (RT1), the first and second head radii are different, in particular the first head radius (RT2) is larger than the second head radius (RT1), in particular the first head radius (RT2) is 1.5 times larger than the second head radius (RT1), or the first head radius (RT2) is 1.8 times larger than the second head radius (RT1); A clock-calendar system (200) according to any one of proposals 22 to 24.

[0036] 26. The instantaneous drive device (92, 96, 97) comprises, in particular, a spring-lever (97) and a calendar cam (96), in particular a calendar cam (96) arranged on the third drive moving part (3), A clock-calendar system (200) according to any one of proposals 18 to 25.

[0037] 27. The system includes a device (98) for holding the date moving part (4) in its position, and a device (93) for minimizing or nullifying the holding torque that holds the date moving part (4) in its position, the device (93) including in particular a cam (95) arranged on the second drive moving part (1). A clock-calendar system (200) according to any one of proposals 18 to 26.

[0038] 28. The first driving movable part (2) includes a third protrusion (23) that drives the day moving part. A clock-calendar system (200) according to any one of proposals 18 to 27.

[0039] 29. A clock movement (300) including a system (200) according to any one of proposals 18 to 28.

[0040] 30. A timepiece (400), in particular a wristwatch, comprising a system (200) according to any one of proposals 18 to 28 and / or a timepiece movement (300) according to proposal 29.

[0041] 31. A method of operating a clock calendar system according to any one of proposals 18 through 28, or a clock movement according to proposal 29, or a clock according to proposal 30, comprising: activating the first tooth (51); a single movement of the first drive lug (21) on the first tooth (51) displaces the date moving part (4) through n steps, where n is an integer of any value between 1 and N, where N is an integer greater than 1, in particular N=2 or N=3, depending on the moment when the first tooth (51) is activated by the activation system (6, 7); A method comprising the steps of:

[0042] 32. When the first tooth (51) is activated, the first protrusion (21) subjects the first tooth (51) to a mechanical action that drives the date moving part (4), and / or when the first tooth is stopped, the first protrusion (21) subjects the first tooth (51) to a mechanical action that retracts the first tooth (51) without driving the date moving part (4); The operating method described in Prop. 31.

[0043] According to a third aspect of the invention, the subject matter is defined by the following propositions:

[0044] 33. A motion transmission system (90), in particular a motion transmission system for a clock calendar system (200), comprising: a drive moving part (4) pivoted about a first axis (A4) and including drive teeth (42) distributed over a curved profile (43), in particular a circular profile (43); a driven movable part (7) pivoted about a second axis (A7) and including a driven tooth row (72); an intermediate pinion (8) pivoted about a third axis (A8) and including a tooth row (81) driven by the driving tooth row (42) and driving the driven tooth row (72); Including, the driving tooth row (42), the curved profile (43), the driven tooth row (72), and the tooth row (81) are arranged at the same height or in the same plane; The driving moving part (4), the driven moving part (7) and the intermediate pinion (8) are arranged such that the driving moving part (4) moves the driven moving part (7) via the intermediate pinion (8) over 1 / m steps for at least several steps of the driving moving part (4), where m is a real number greater than 1, preferably between 2 and 20; and the driving moving part (4) is arranged such that, while the driving moving part (4), in particular via the curved profile (43), is in a predetermined angular position, the driving moving part (4) makes the angular position of the driven moving part (7) definable via the pinion (8) with minimal play. Transmission systems (90).

[0045] 34. The curved profile (43) is centered on the first axis (A4) and at least partially defines the outer contour of the drive armature (4); A transmission system (90) as described in Proposition 33.

[0046] 35. The intermediate pinion (8) includes asymmetric teeth. A transmission system (90) as described in proposal 33 or 34.

[0047] 36. The intermediate pinion (8) includes 4 or 5 pairs of teeth. A transmission system (90) according to any one of proposals 33 to 35.

[0048] 37. The teeth of a pair of teeth are arranged symmetrically with respect to a plane (P81) passing through the third axis (A8) of the intermediate pinion (8). A transmission system (90) as described in Proposition 36.

[0049] 38. The drive tooth row (42) includes one or more teeth (42i) surrounded by two first notches (42j, 42k) and distributed over the curved profile (43). A transmission system (90) according to any one of proposals 33 to 37.

[0050] 39. The driven tooth row (72) includes teeth (72i), each of which is surrounded by two second notches (72j, 72k); A transmission system (90) according to any one of proposals 33 to 38.

[0051] 40. The driving movable part (4), the driven movable part (7), and the intermediate pinion (8) are the one or more teeth (42i) of the drive tooth row (42) interact exclusively with the inner side surfaces (812i) of the tooth pairs of the pinion (8); the outer flanks (813i) of the tooth pairs of the pinion (8) interact with the flanks of the second notches (72j, 72k) of the driven tooth row (72); the curved profile (43) interacts exclusively with the outer side surface (813i); It is arranged as follows: A transmission system (90) as described in proposal 38 or 39.

[0052] 41. The driven movable part (7) surrounds the driving movable part (4), or The driving movable part (4) surrounds the driven movable part (7), A transmission system (90) according to any one of proposals 33 to 40.

[0053] 42. The driven moving part (7) is a lunar moving part, in particular a lunar cam and / or lunar display moving part, or The driving moving part (4) is a date moving part. A transmission system (90) according to any one of proposals 33 to 41.

[0054] 43. The driving moving part (4), the driven moving part (7) and the intermediate pinion (8) are arranged so that the driven moving part (7) is driven before the 28th day of the month, preferably when the 26th day of the month turns into the 27th day and / or when the 27th day of the month turns into the 28th day. A transmission system (90) as described in Proposition 42.

[0055] 44. The driven movable part (7) is a month cam arranged to control the activation of the first tooth (51) that drives the driving movable part constituting the date movable part (4), and the first tooth (51) is mounted on the date movable part (4) so ​​as to be displaceable between a stopped or retracted position and an activated or driven position. A transmission system (90) as described in proposal 42 or 43.

[0056] 45. A clock-calendar system (200) including a transmission system (90) according to any one of proposals 33 to 44.

[0057] 46. ​​A clock movement (300) comprising a transmission system (90) according to any one of proposals 33 to 44 and / or a calendar system (200) according to proposal 45.

[0058] 47. A timepiece (400), in particular a wristwatch, comprising a transmission system (90) according to any one of proposals 33 to 44 and / or a calendar system (200) according to proposal 45 and / or a timepiece movement (300) according to proposal 46.

[0059] Any combination of the features mentioned in the various aspects above is contemplated, provided that it is logically or technically compatible.

[0060] The accompanying drawings show, by way of example, an embodiment of a watch. [Brief explanation of the drawings]

[0061] [Figure 1] FIG. 1 is a schematic diagram of one embodiment of a watch. [Figure 2] FIG. 2 is a diagram showing an embodiment of a calendar system provided in a watch. [Figure 3] FIG. 3 is a top view of the drive unit that drives the calendar display movable part. [Figure 4] FIG. 4 is a bottom view of the drive unit that drives the calendar display movable part. [Figure 5] FIG. 5 is an exploded view of the drive movable part. [Figure 6] FIG. 6 is a diagram showing an embodiment of a calendar system provided in a watch. [Figure 7] FIG. 7 illustrates the operation of an embodiment of a calendar system. [Figure 8] FIG. 8 illustrates the operation of an embodiment of a calendar system. [Figure 9] FIG. 9 illustrates the operation of an embodiment of a calendar system. [Figure 10] FIG. 10 is a diagram illustrating the operation of an embodiment of a calendar system. [Figure 11] FIG. 11 is a diagram illustrating the operation of an embodiment of a calendar system. [Figure 12] FIG. 12 illustrates the operation of an embodiment of a calendar system. [Figure 13] FIG. 13 illustrates the operation of an embodiment of a calendar system. [Figure 14] FIG. 14 is a diagram illustrating the operation of an embodiment of a calendar system. [Figure 15] FIG. 15 illustrates the operation of an embodiment of a calendar system. [Figure 16] FIG. 16 illustrates the operation of an embodiment of a calendar system. [Figure 17] FIG. 17 is a diagram showing the operation of the motion transmission system according to the present invention. [Figure 18] FIG. 18 is a diagram showing the operation of the motion transmission system according to the present invention. [Figure 19] FIG. 19 is a diagram showing the operation of the motion transmission system according to the present invention. [Figure 20] FIG. 20 is a diagram showing the operation of the motion transmission system according to the present invention. [Figure 21] FIG. 21 shows a detailed view of the shape of the pinion that forms part of the motion transmission system. DETAILED DESCRIPTION OF THE INVENTION

[0062] One embodiment of a watch 400 will be described in detail below with reference to Figures 1 to 21. The watch 400 is, for example, a miniature watch, in particular a wristwatch. The watch 400 includes a watch movement 300 intended to be mounted in a watch casing or case to protect it from the external environment. The watch movement 300 may be a mechanical movement, in particular an automatic movement, or a hybrid movement. Alternatively, the movement 300 may be an electronic or electromechanical movement.

[0063] The timepiece movement 300 includes a calendar system 200. In particular, the calendar system 200 may be a calendar module added to the rest of the movement. The movement and / or calendar module includes a frame 199, which may include, for example, one or more plates and possibly bridges.

[0064] In the described embodiment, the calendar system is semi-perpetual and shows indications of the date, day of the week, and month. Alternatively, the calendar may be of other types, particularly annual or perpetual. The calendar system may also display other sets of indications.

[0065] The clock calendar system 200 includes: - a date moving element 4 displaceable in steps relative to the frame 199; a drive unit 100; Includes.

[0066] The drive unit 100 is - a drive lug 21 that drives the date movement 4; - teeth 51 for driving the date moving element 4, a first tooth 51 being mounted on the date moving element 4 so as to be displaceable between a stopped or retracted position and an activated or driven position; - starting system 6, 7, starting teeth 51; Includes.

[0067] The date moving part 4, which may in particular be a date disc 4, is preferentially centered on the calendar system 200 or movement 300 along an axis A4. The date moving part 4 comprises a toothing 41 provided with 31 teeth and a protrusion 5 movably mounted on said moving part 4, in particular pivotably mounted on said moving part 4 about an axis of rotation A5. The protrusion 5 comprises a tooth 51 at one of its ends, in particular at the longitudinal end opposite the end at which the axis of rotation A5 is located. In a first configuration of the calendar system, in particular a first configuration of the actuation systems 6, 7 that may be referred to as the stop configuration, the tooth 51 is movable relative to the moving part 4. In a second configuration of the calendar system, in particular a second configuration of the actuation systems 6, 7 that may be referred to as the actuation configuration, the tooth 51 is prevented from moving relative to the moving part 4.

[0068] Preferentially, the toothing 41 takes the form of an internal toothing, with the teeth 51 directed inwards, in other words the teeth of the toothing 41 and the teeth of the toothing 51 are preferably oriented towards the axis A4.

[0069] Advantageously, as shown in FIG. 6 , when the tooth 51 is prevented from moving relative to the movable part 4, in particular when movement about the axis A5 is prevented, the head radius RT5 of the tooth 51 (defined from the axis A4) is different from the head radius RT4 of the tooth of the tooth row 41 (defined from the axis A4). Preferentially, when the tooth 51 is prevented from moving relative to the movable part 4, in particular when movement about the axis A5 is prevented, the head radius RT5 of the tooth 51 is smaller than the head radius RT4, or is smaller than 0.9 × RT4. In other words, the tooth 51 protrudes or is capable of protruding beyond the tooth row 41. Such a configuration of the tooth 51 makes it possible to maximize the lead of the movable part 4 when the movable part 4 is driven by the interaction between the tooth 51 and the drive device 100. More specifically, such a configuration of the tooth 51 makes it possible to potentially activate the movable part 4 in multiple steps when the movable part 4 is driven by the interaction between the tooth 51 and the drive part 100.

[0070] The lug 5 is able to interact with the follower 6, in particular with a lever 6 mounted on the frame 199 of the calendar system 200 or of the movement 300, so as to be pivotable about an axis A6. To this end, the lug 5 comprises a contact surface 52 arranged to interact by contacting a lateral surface 62 of the follower 6. The follower 6 also comprises a peg or pin 61 intended to be housed in a groove 71 in the moon cam 7, which here takes on an annular shape.

[0071] The flanks 71a, 71b of the groove 71 of the cam 7 act as cam profiles 71a, 71b, respectively, provided to control the position of the follower 6, in particular the angular position of the follower 6 about the axis A6, via the pin 61, independently of any return spring.

[0072] The follower 6 and the cam 7 thus form part of an actuation system 6, 7 which actuates the projection 5 or tooth 51. The follower 6 and the cam 7 preferably: - in at least one position of the mobile part 4, it allows the movement of the projections 5 or teeth 51 around the axis A5, and - preventing the movement of the projection 5 or tooth 51 around the axis A5 in at least one position of the movable part 4, in particular in at least one position of the movable part 4 corresponding to the above-mentioned position of the movable part 4; The desmodromic system is defined as follows:

[0073] More specifically, the at least one first position of the cam 7 defines a first position of the follower 6 that allows movement of the protrusion 5 or tooth 51 about the axis A5 in at least one position of the movable part 4. More specifically, the at least one second position of the cam 7 defines a second position of the follower 6 that prevents movement of the protrusion 5 or tooth 51 about the axis A5 in at least one position of the movable part 4. In the latter configuration, the tooth 51 protrudes beyond the row of teeth 41 in the disclosed embodiment.

[0074] The implementation of the activation systems 6, 7 allows for the adjustment of annual, semi-perpetual or perpetual cycle programs, as explained below.

[0075] The cam 7 is preferentially centered on the calendar system 200 or the movement 300 along the axis A7. For this reason, the axes A4 and A7 preferentially coincide. In other words, the movable part 4 and the cam 7 are preferably arranged coaxially. The movable part 4 and the cam 7 are advantageously connected by a transmission system, which will be explained in detail below. Preferentially, the cam 7 comprises a toothing 72 that can be cyclically driven by the teeth of the toothing 42 of the movable part 4 via a pinion 8 that is pivoted about the axis A8, as will be explained below.

[0076] Preferentially, the dentition 42 takes the form of an external dentition and the dentition 72 takes the form of an internal dentition.

[0077] Furthermore, the calendar system 200 comprises a day star 9, which is preferentially centred on the calendar system 200 or on the movement 300 along an axis A9. For this reason, the axes A4, A7 and A9 preferentially coincide. In other words, the elements 4, 7 and 9 are preferably arranged coaxially. In particular, the day star 9 comprises a tooth row 91, which is provided with seven teeth.

[0078] The moving part 4 and the star wheel 9 are angularly indexed and positioned relative to the frame 199 via pinions 98 and 99, respectively (the pinions 98 and 99 are shown diagrammatically in FIG. 2). The cam 7 is angularly indexed relative to the frame 199 by the moving part 4 via a pinion 8. More specifically, the pinion 8 is specifically configured to allow the cam 7 to be angularly locked with minimal play when the cam 7 is not driven by one of the teeth of the toothing 42 of the moving part 4, as will be explained below. The moving part 4 and the star wheel 9 are constructed and / or arranged so that they can be driven periodically, in particular every 24 hours, by a drive device 100. The cam 7 is constructed and / or arranged so that it can be driven periodically, via the moving part 4 and the pinion 8, by the drive device 100 at the end of each month and possibly at the beginning of each month.

[0079] 3 and 4 respectively show the top and bottom views of the drive 100. The drive 100 is connected to the gear train of the movement 300 via an hour wheel 201.

[0080] The drive device 100 comprises a drive movable part 1 pivoted about an axis A1 and provided with a drive lug 11 fixed to a toothed wheel 12 for common rotation. The drive lug 11 is configured and / or arranged to drive the movable part 4 by contact, by interaction with one of the teeth of the toothing 41, every 24 hours. Likewise, the drive lug 11 is configured to lock the movable part 4 after driving said movable part 4. The drive is advantageously of the instantaneous type.

[0081] More specifically, the drive lug 11 includes a first, rigid portion 11 a and a second, elastic portion 11 b. Such a configuration of the drive lug advantageously allows for a quick correction of the date in the month, especially after a date jump, when the lug 11 is located between two teeth of the toothing 41, as disclosed in US Pat.

[0082] In this case, the drive lugs 11 are directed outward. In other words, the drive lugs 11 extend radially relative to the axis A1, away from the axis A1, until they reach a circle of radius RT1 (meaning the head radius) centered on the axis A1, as shown in Figure 6. Furthermore, in this case, the axis A1 is arranged on a circle of radius R1 centered on the axis A4.

[0083] Similarly, the drive device 100 comprises a drive moving part 2 pivoted about axis A2 and provided with a drive lug 21. The lug 21 is fixed to a gear 22 for common rotation. The drive lug 21 is arranged to drive the drive part 4 by contact, in particular by interaction with the tooth 51 of the lug 5, when the follower 6 prevents the lug 5 or the tooth 51 from moving about axis A5. The driving occurs at the end of each month having 30 or fewer days. Similarly, the drive moving part 2 is provided with a drive lug 23 fixed to gear 22 for common rotation. The drive lug 23 is arranged to drive the star wheel 9 by contact, in particular by interaction with one of the teeth of the toothing 91.

[0084] The drive lugs 21 are directed outward, in other words, they extend radially relative to the axis A2, away from the axis A2, until they reach a circle of radius RT2 (meaning the head radius) centered on the axis A2, as shown in Figure 6. Furthermore, in this case, the axis A2 is arranged on a circle of radius R2 centered on the axis A4.

[0085] Advantageously, radius RT2 is different from radius RT1. More specifically, radius RT2 is greater than radius RT1, or greater than 1.5 x RT1, or greater than 1.8 x RT1. Also advantageously, radius R2 is different from radius R1. More specifically, radius R2 is advantageously smaller than radius R1, or smaller than 0.9 x RT1, or smaller than 0.8 x RT1.

[0086] Such a configuration of the driving movable part 2 ensures that when movement of the tooth 51 relative to the movable part 4 is prevented, in particular rotation around the axis A5, the contact interaction between the protrusion 21 and the tooth 51 makes it possible to drive the movable part 4 through one or more angular steps of the movable part 4, while the configuration of the driving movable part 1 has the advantage of making it possible to drive the movable part 4 through a single and unique angular step of the movable part 4.

[0087] Advantageously, such a configuration of the drive movable parts 1 and 2 interacts with a movable part 4 which comprises an internal toothing 41 provided with a head radius RT4 and an internal toothing 51 provided with a head radius RT5, and when movement of the teeth 51 relative to the movable part 4 is prevented, in particular when rotation about the axis A5 is prevented, the head radius RT5 is smaller than the head radius RT4 or smaller than 0.9 x RT4.

[0088] The lead of the movable part 4 is thus optimized to enable up to several jumps or several angular steps to be performed by an independent movement of the protrusion 21. In particular, the drive movable part 2 and the movable part 4 are arranged and / or configured to enable several jumps or several angular jumps of the movable part 4 by an independent movement of the protrusion 21. "Independent movement of the protrusion 21" is understood to mean a partial or complete rotation by a rotary movement of the protrusion 21 around the axis A2.

[0089] In this way, the drive lug 21 and the tooth 51 are arranged so that a single movement of the drive lug 21 on the tooth 51 can displace the date moving part 4 through N steps, where N is an integer greater than 1, in particular N=2 or N=3.

[0090] The drive moving parts 1 and 2 are kinematically connected to one another via the drive moving part 3 of the axis A3. More specifically, the gears 12 and 22 are kinematically connected to one another via the gear 32 of the third moving part 3, which in this case is arranged between the gears 12 and 22. In the embodiment shown, the axis A3 is arranged on a circle of radius R3, centered on the axis A4. Preferentially, the radius R3 is different from the radii R1 and R2. More specifically, the radius R3 is advantageously larger than the radii R1 and R2. Preferentially, R3>R1>R2.

[0091] Likewise, the third movable part 3 comprises a gear 31 fixed to a gear 32 for common rotation, at least in one direction of rotation, thereby making it possible to connect the hour gear 201 to the third movable part 3 via two pinions 202a, 202b fixed to one another. More specifically, gear 201 drives pinion 202a, which in turn drives gear 31 and thereby gear 32. Gear 32 thus drives gears 12 and 22, in particular in the same direction of rotation.

[0092] Drive 100, and in particular movements 1, 2, 3, are thus connected to the gear train of movement 300 via hour wheel 201. Advantageously, movements 1 and 2 are arranged on either side of a plane passing through axis A3 of drive movement 3 and through an axis of the movement (which coincides in particular with axis A4 of the date movement).

[0093] Advantageously, the drive device 100 includes an instantaneous drive 92. The instantaneous drive 92 primarily comprises a calendar cam 96 and a lever-spring 97 pivoted on a frame 199. Preferentially, and more specifically, the moving part 3, which can be seen in the exploded view of FIG. 5, comprises the calendar cam 96, which is provided to interact with the lever-spring 97 and in particular with a roller 971 pivoted on the lever-spring 97. The cam 96 is fixed, in particular, to the gear 32. The interaction of the cam 96 with the lever-spring 97 makes it possible, via the drive moving part 1 and / or 2, in particular the lugs 11 and / or 21, to instantaneously drive the moving part 4 over at least one angular step of the moving part 4. Similarly, the interaction of the cam 96 with the lever-spring 97 makes it possible, via the drive moving part 2, in particular the lugs 23, to instantaneously drive the star wheel 9 over one angular step of the star wheel 9.

[0094] Advantageously, the drive 100 comprises a one-way connection device 94. Preferentially, the third mobile part 3 comprises a one-way connection device 94, which makes it possible to rotationally connect the wheels 31 and 32 in a single and same direction of rotation. The device comprises a pawl 941 which pivots on the wheel 31, is elastically returned by a spring 942 and is able to interact by contact with a pin or peg 321 of the wheel 32. The implementation of such a connection device makes it possible, inter alia, to correct the calendar system 200 at any time, regardless of the previous operation of the calendar system 200 or the movement 300.

[0095] Throughout the day, under the influence of the rotation of the cam 96, the drive 100 stores elastic potential energy due to the winding up of the spring 972 of the lever-spring 97, deforming the spring 972, which is itself driven by the movement 300 via the hour wheel 201. When the roller 971 reaches the apex 961 of the cam 96 (as shown in FIG. 4), the spring 972 transfers the stored energy, and the lever-spring 97 thus becomes the driving side. The lever-spring 97 drives the cam 96 through a predetermined angular range until the roller 971 is positioned in the recess 962 of the cam 96, which is made possible, inter alia, by the one-way connection 94. At this stage, particularly when the cam 96 is displaced under the influence of the lever 97, the drive armature 1, which is kinematically connected to the cam 96, instantly drives the armature 4 through an angular step via the interaction of the projection 11 with the teeth of the toothing 41. At the same stage, the drive movable part 2, which is also kinematically connected to the cam 96, drives the movable part 4 instantaneously through at least one additional angular step due to the interaction of the protrusion 21 with the tooth 51 when the tooth 51 is prevented from moving relative to the movable part 4, in particular when the tooth 51 is prevented from moving around the axis A5 under the influence of the actuation systems 6, 7.

[0096] Thus, the structure of the drive device 100 makes it possible to drive the movable part 4 through one, two, three, or four angular steps of the movable part 4 for a given displacement of the cam 96 under the influence of the lever 97. This is possible due to the fact that the drive device 100 includes two separate drive movable parts 1, 2 pivoted about two separate axes A1 and A2, where the displacement of the respective protrusions 11, 21 is performed simultaneously and the respective contact of one of the teeth of the toothing 41 with the tooth 51 is performed successively. Advantageously, the axes A1, A2 are arranged on circles with separate radii R1, R2. Also advantageously, the protrusion 21 has a head radius RT2 different from the head radius RT1 of the protrusion 11. In particular, the head radius RT2 is greater than the head radius RT1. Configured in this way, the drive movable part 2, in particular the protrusion 21, can drive the movable part 4 through N steps, where N is an integer greater than 1, in particular N=2 or N=3.

[0097] The projections 11 and 21 rotate preferentially at the same speed, and for this reason the tooth rows of the gears 12, 22, 32 have in particular the same number of teeth and extend at the same height or in the same plane.

[0098] Advantageously, the drive device 100 comprises a device 93 for stopping the jumper 98. Said device 93 comprises a jumper cam 95 arranged to interact with the jumper 98 and in particular with a roller 981 pivoting on a spring-forming part 982 of the jumper 98. Such a device advantageously makes it possible to reduce or eliminate the indexing or position-holding torque of the movable part 4, which is generated by the jumper 98 when the projection 11 drives one of the teeth of the toothing 41 and / or when the projection 21 drives the tooth 51, in particular when the cam 96 is driven under the influence of the lever-spring 97, in particular under the influence of the spring 972 transmitting stored energy.

[0099] The drive armature 1 preferentially comprises a cam 95 arranged to interact with a jumper 98 .

[0100] For this purpose, the drive moving part 1 preferably includes, in addition to the first protrusion 11 and the gear 12, a jumper cam 95 of the jumper stop device 93. For this purpose, the drive moving part 2 preferably includes, in addition to the second protrusion 21 and the gear 22, a third drive protrusion 23. For this purpose, the drive moving part 3 preferably includes, in addition to the gears 31 and 32, a calendar cam 96 of the instantaneous drive device 92 and a one-way connection device 94. However, other arrangements of the various elements 23, 95, 96 on the various drive moving parts are also foreseeable.

[0101] Such a configuration of the drive armature 1, 2 and 3 allows distributing the various elements involved in the drive device 100 and / or the instantaneous drive device 92 and / or the one-way connection device 94 and / or the jumper stop device 93, allowing these elements to coexist in the best possible way. This has the advantage, inter alia, of achieving a particularly thin drive device 100 and, for even stronger reasons, a particularly thin calendar system 200.

[0102] An embodiment of a method for operating an embodiment of the calendar system 200 is described below in several contexts. - the end of a month with 28 days (February), - the end of a month with 31 days (March), and - The end of a month with 30 days (April).

[0103] <Operation at the end of February, which has 28 days>

[0104] 7 to 11 illustrate the operation of the calendar system when the date changes at the end of the month of February, which has 28 days. During this phase, the moving part 4 makes four jumps or movements over four angular steps. Advantageously, the moving part 4 operates under the influence of the transfer of stored energy by the spring 972 of the lever 97, which drives the calendar cam 96 and the lugs 11, 21 until the roller 971 is located in the recess 962 of the cam 96.

[0105] Figure 7 illustrates the calendar system at midnight on February 28th, just before the moving part 4 jumps. In this configuration, roller 971 begins to descend calendar cam 96 from its apex 961, as shown in Figure 4. Protrusion 21 then contacts tooth 51, but protrusion 11 is out of range of tooth 41.

[0106] In this case, tooth 51 is prevented from moving relative to the mobile part 4, in particular about axis A5, under the influence of the interaction of surfaces 52 and 62 of protrusion 5 and follower 6, respectively. This is made possible by the interaction of follower 6 with cam 7, in particular the interaction of pin 61 with groove 71, which positions flank 62 of follower 6 so that tooth 51 cannot retract under the action of protrusion 21. Thus, when actuation systems 6, 7 are in said configuration, contact between protrusion 21 and tooth 51 causes mobile part 4 to rotate about axis A4.

[0107] 8 illustrates the calendar system after the movable part 4 has been displaced through a first angular step about the axis A4, having seen that the protrusion 21 has performed a rotation through a first angle α1 about the axis A2, where the protrusion 11 remains outside the range of the tooth row 41, despite having already performed a rotation about the axis A1.

[0108] 9 illustrates the calendar system after the movable part 4 has been displaced through a second angular step about the axis A4, having seen that the protrusion 21 has performed a rotation through a second angle α2 about the axis A2, where the protrusion 11 remains outside the range of the tooth row 41, despite having already performed a rotation about the axis A1.

[0109] 10 illustrates the calendar system after the movable part 4 has been displaced through a third angular step about the axis A4, after having seen that the protrusion 21 has performed a rotation through a third angle α3 about the axis A2. In this configuration, the protrusion 21 is out of contact with the tooth 51 and the protrusion 11 is in contact with one of the teeth of the tooth row 41.

[0110] Therefore, the protrusion 21 was in contact with the tooth 51 over an angle θ=α1+α2+α3 around the axis A2.

[0111] 11 illustrates the calendar system for March 1st after the movable part 4 has been displaced through a fourth angular step around the axis A4, having seen that the protrusion 11 has performed a rotation through a first angle β1 around the axis A1. More specifically, FIG. 11 illustrates the calendar system immediately after the date has changed, with the roller 971 located in the recess 962 of the cam 96. In this configuration, the protrusion 11 is located between two teeth of the toothing 41, such that the protrusion 11 locks the movable part 4 and thus prevents any unexpected additional jumps of said movable part. Preferentially, β1≧α1, α2, α3. Preferentially, β1≦θ.

[0112] Advantageously, the stopping device 93 of the jumper 98 (not shown in Figures 7 to 11) is actuated by the rotation of the drive moving part 1, in particular about the axis A1, which makes it possible to minimize or eliminate the torque that indexes the moving part 4 or holds it in its position when the moving part 4 is actuated under the influence of the projections 11 and / or 21.

[0113] When protrusion 23 comes into contact with one of the teeth of tooth row 91 of star wheel 9 and drives the star wheel, the indication of the day of the week is driven. When a date jump has been performed (as shown in FIG. 11 ), protrusion 23 is positioned between two teeth of tooth row 91 so that protrusion 23 locks star wheel 9 and prevents any additional unintended jumps of said star wheel. For example, protrusion 23 can come into contact with one of the teeth of tooth row 91 of star wheel 9 at (or substantially at) the same time that protrusion 11 comes into contact with one of the teeth of tooth row 41.

[0114] During this operating phase, protrusion 21 displaced moving part 4 over three steps, and protrusion 11 displaced moving part 4 over one step. Just before midnight on February 28, the date moving part indicated "28," and just after midnight on March 1, the date moving part indicated "1." The four movement steps of the moving part allowed for the following four successive changes in the course of one instantaneous movement: - Display of date "28" to display of date "29", then - Display of date "29" to display of date "30", then - Display of date "30" to display of date "31", then - Changes from displaying the date "31" to displaying the date "1".

[0115] <Operation at the end of March>

[0116] FIG. 13 illustrates the state of the calendar system at midnight on March 30th, just before the jump of the moving part 4, and FIG. 14 illustrates the state of the calendar system at midnight on March 31st, just before the jump of the moving part 4.

[0117] 13, the follower 6 is positioned in this case by the cam 7, in particular by the pin 61 and the groove 71, so that the flank 62 of the follower is outside the range of the surface 52 of the projection 5. The projection 5 is thus movable about the axis A5, and the tooth 51 retracts under the action of the projection 21. The projection 21 therefore does not drive the rotation of the movable part 4 about the axis A4. The movable part 4 is finally driven through a single and unique angular step about the axis A4 through the interaction of the projection 11 with the teeth of the toothing 41 over a first angle β1 about the axis A1. The star wheel 9 itself is driven through an angular step about the axis A9 under the action of the projection 23.

[0118] 14, the follower 6 is positioned in this case by the cam 7, in particular by the pin 61 and the groove 71, so that the flank 62 of the follower is outside the range of the surface 52 of the projection 5. The projection 5 is thus movable about the axis A5, and the tooth 51 retracts under the action of the projection 21. The projection 21 therefore does not drive the rotation of the movable part 4 about the axis A4. The movable part 4 is finally driven through a single and unique angular step about the axis A4 through the interaction of the projection 11 with the teeth of the toothing 41 over a first angle β1 about the axis A1. The star wheel 9 itself is driven through an angular step about the axis A9 under the action of the projection 23.

[0119] The same thing happens when the date changes from March 28th to March 29th, and again when the date changes from March 29th to March 30th.

[0120] <Operation at the end of April>

[0121] 15 to 16 illustrate the operation of the calendar system when the date changes at the end of April: during this phase, the moving part 4 performs two jumps or moves over two angle steps.

[0122] 15 illustrates a calendar system at midnight on April 30th. In this case, follower 6 is positioned by cam 7, in particular by pin 61 and groove 71, so that side surface 62 of follower 6 contacts surface 52 of protrusion 5. Therefore, when protrusion 21 contacts tooth 51, it drives rotation of movable part 4 about axis A4, even though protrusion 11 is outside the range of tooth row 41.

[0123] 16 shows the calendar system after the movable part 4 has been displaced through a first angular step about the axis A4, after the projection 21 has performed a rotation through a third angle α3 about the axis A2. In this configuration, the projection 21 is out of contact with the tooth 51, and the projection 11 is in contact with one of the teeth of the toothing 41 so that it can drive the movable part 4 through a second angular step about the axis A4. At this time, the star wheel 9 is also driven under the action of the projection 23.

[0124] In this operating phase, protrusion 21 displaces movable element 4 by one step, and protrusion 11 displaces movable element 4 by one step. Just before midnight on April 30th, the date movable element shows "30", and just after midnight on May 1st, the date movable element shows "1". The two operating steps of movable element 4 allow two successive changes in the course of one instantaneous operation: - Display of date "30" to display of date "31", then - Changes from displaying the date "31" to displaying the date "1".

[0125] Just before the jump of the movable part 4, at midnight on April 28th, the follower 6 is positioned by the cam 7, in particular by the pin 61 and the groove 71, so that the flank 62 of the follower is outside the range of the surface 52 of the projection 5. The projection 5 is thus movable about the axis A5, and the tooth 51 retracts under the action of the projection 21. The projection 21 therefore does not drive the rotation of the movable part 4 about the axis A4. The movable part 4 is finally driven through a single and unique angular step about the axis A4 through the interaction of the projection 11 with the teeth of the toothing 41 over a first angle β1 about the axis A1. The star wheel 9 itself is driven through an angular step about the axis A9 under the action of the projection 23.

[0126] Similarly, just before the jump of the movable part 4, at midnight on April 29th, the follower 6 is positioned by the cam 7, in particular by the pin 61 and the groove 71, so that the flank 62 of the follower is outside the range of the surface 52 of the projection 5. The projection 5 is thus movable about the axis A5, and the tooth 51 retracts under the action of the projection 21. The projection 21 therefore does not drive the rotation of the movable part 4 about the axis A4. The movable part 4 is finally driven through a single and unique angular step about the axis A4 through the interaction of the projection 11 with the teeth of the toothing 41 over a first angle β1 about the axis A1. The star wheel 9 itself is driven through an angular step about the axis A9 under the action of the projection 23.

[0127] For this reason, it is noted that the actuation system 6, 7 is preferably arranged so that the sole action of the first drive lug 21 on the first tooth 51 displaces the date drive 4 through n steps, where n is an integer of any value between 1 and N, where N is an integer greater than 1, in particular N=2 or N=3, depending on the moment at which the first tooth 51 is driven by the actuation system 6, 7.

[0128] For this reason, it is noted that the actuation systems 6, 7 are preferably arranged such that at least a first position of the lunar cam 7 defines a first position of the follower 6 that allows the first tooth 51 to retract, and at least a second position of the lunar cam 7 defines a second position of the follower 6 that prevents the first tooth 51 from retracting.

[0129] As mentioned above, the present invention relates to a method for operating a clock calendar system or a clock movement or a clock, the method comprising the following steps: - Activation of first tooth 51, - a single action of the first drive lug 21 on the first tooth 51, capable of displacing the date moving part 4 over an amplitude of up to N steps, where N is an integer greater than 1, in particular N=2 or N=3.

[0130] Advantageously, the sole action of the first drive lug 21 on the first tooth 51 displaces the date moving part 4 through n steps, where n is an integer of any value between 1 and N depending on the moment at which the first tooth 51 is driven by the actuation system 6, 7.

[0131] For this reason, the invention also relates to a method for operating a clock calendar system or a clock movement or a clock, said method comprising the following steps: - Activation of first tooth 51, - the sole action of the first drive lug 21 on the first tooth 51, capable of displacing the date moving part 4 through n steps, where n is an integer of any value between 1 and N, where N>1, in particular N=2 or N=3, depending on the moment at which the first tooth 51 is driven by the actuation system 6, 7.

[0132] Regardless of the method described above, it is noted that preferably, when the first tooth 51 is activated (under the control of the activation systems 6, 7) in accordance with the method described above, the first protrusion 21 subjects the first tooth 51 to mechanical action for driving the date moving part 4.

[0133] Alternatively or additionally, regardless of the method described above, it is noted that preferably, when the first tooth 51 is stopped (under the control of the actuation systems 6, 7), the first protrusion 21 subjects the first tooth 51 to a mechanical action in order to retract the first tooth 51 without driving the date moving part 4.

[0134] In this way, it is entirely possible to configure the actuation system 6, 7 to implement an annual calendar system. In this scenario, the actuation system controls the actuation of the lug 51 in each month, such as a month with 30 days or a month with 31 days, without changing any of the drive elements. To this end, the cam 7, and in particular the groove 71, may be modified, among other things.

[0135] The month cam 7 is driven in rotation about the axis A7 in the event of a specific change of the date, so that the toothing 72 of the cam 7 can be driven periodically by the teeth of the toothing 42 of the movable part 4 via a pinion 8 interposed between the movable part 4 and the cam 7.

[0136] According to another aspect of the invention, an embodiment of the watch 400 or watch movement 300 or calendar system 200 may include: a drive armature 4 pivoted about a first axis A4 and including a drive toothing 42 distributed over a curved profile 43, in particular a circular profile 43; a driven mobile part 7 pivoted about a second axis A7 and including a driven toothing 72; an intermediate pinion 8 pivoted about a third axis A8 and including a toothing 81 driven by the driving toothing 42 and driving the driven toothing 72; The motion transfer system 90 includes:

[0137] Preferably, the curved profile 43 is centred on the axis A4 and defines at least partly the outer contour of the drive armature 4.

[0138] The driving tooth row 42, the curved profile 43, the driven tooth row 72 and the tooth row 81 are arranged at the same height or in the same plane.

[0139] The driving movable part 4, the driven movable part 7, and the intermediate pinion 8 are arranged so that the driving movable part 4 moves the driven movable part 7, via the intermediate pinion 8, through 1 / m steps for at least some steps of the driving movable part 4, where m is a real number greater than 1, preferably between 2 and 20.

[0140] The driving movable part 4, the driven movable part 7 and the intermediate pinion 8 are arranged such that the driving movable part 4 is in a predetermined angular position, in particular via the curved profile 43, while the driving movable part 4 can define the angular position of the driven movable part 7 via the pinion 8 with minimal play.

[0141] As shown in FIG. 21, the pinion 8 is provided with a row of teeth 81 which, on the one hand, extends at a single and unique height or in a single and unique plane P8, and, on the other hand, has the particular feature of including teeth 81i which are not evenly spaced relative to the axis A8 of the pinion.

[0142] More specifically, the tooth row 81 has the particular feature of including separate first and second steps P1, P2.

[0143] The concept of a step p between two successive teeth can be likened to the concept of a distance d between the teeth, measured in a radial direction substantially perpendicular to the axis A8, independent of the number of teeth and / or the tooth modulus of the pinion. Said distance can be measured at each tooth head 811i. Thus, more specifically, the distance d here corresponds to the length of a circular arc centered on the axis A8, connecting the heads 811i of two successive teeth.

[0144] Alternatively, the concept of a step p between two consecutive teeth can be likened to the concept of an angle α formed by two planes P81i perpendicular to the plane P8, which pass through each of two consecutive teeth and in so doing pass through the axis A8 and through each head 811i of each tooth.

[0145] Of course, d and α are interrelated, where d ≈ α × r, where r is the radius of the pinion head and α is expressed in radians.

[0146] More specifically, as shown in Figure 21, each tooth 81i may be substantially composed of tooth 81a arranged between two teeth 81b and 81c. More specifically, teeth 81b and 81c are arranged on either side of tooth 81a in a first direction s1 and a second direction s2, respectively, as viewed from tooth 81a. Tooth 81b is arranged at a first distance d1 from tooth 81a, and tooth 81c is arranged at a second distance d2 from tooth 81a. The first and second distances d1 and d2 are different, and the first and second directions s1 and s2 are opposite directions.

[0147] By convention, d2>d1 in FIG. 21. Preferentially, d2>1.5×d1, or d2>1.6×d1, or d2>1.7×d1.

[0148] Also by convention, direction s1 corresponds to the counterclockwise direction and direction s2 corresponds to the clockwise direction in the same Figure 21. Similarly, angles α1 and α2 may constitute directional angles, with α1 being considered positive and α2 being negative.

[0149] Thus, essentially, teeth 81b and 81a are separated by a first directivity angle α1 about axis A8, and teeth 81c and 81a are separated by a second directivity angle α2 about axis A8, which is different from α1 and α2 and has the opposite sign.

[0150] In Figure 21, |α2|>|α1|. Preferentially, |α2|>1.5×|α1|, or |α2|>1.6×|α1|, or |α2|>1.7×|α1|.

[0151] More generally, tooth 81b adjoins tooth 81a at a distance of a first step p1 in a first direction s1, and tooth 81c adjoins tooth 81a at a distance of a second step p2 in a second direction s2.

[0152] Thus, the tooth row 81 includes pairs of teeth, the two teeth of the same pair being separated by a distance of a first step P1, and the two teeth of two separate pairs being separated by a distance of a second step p2.

[0153] Each tooth 81i preferentially has the same head radius r.

[0154] Advantageously, the teeth 81i are asymmetric with respect to their plane P81i, so that each tooth 81i comprises different first and second flanks 812i, 813i, such a tooth configuration making it possible to optimize the shape of each of the flanks with respect to their respective functions.

[0155] In particular, each tooth 81i of the toothing 81 comprises a first flank 812i, which allows it to be driven by a tooth 42i of the toothing 42 of the mobile part 4, on the one hand, and, at least partially, by a tooth of the toothing 72i of the cam 7, on the other hand. Preferably, each tooth 42i is surrounded by two notches 42j, 42k, distributed over the curved profile 43. Depending on the configuration of the cam 7, the first flank 812i can also determine the position of the cam 7, in particular angularly lock the cam 7 with minimal play. The first flank 812i is configured in particular to optimize the lead of the pinion 8 under the influence of the drive of the mobile part 4. In particular, the shape of the flank 812i can be optimized in great detail with respect to this embodiment.

[0156] The tooth row 81 includes a second side surface 813i which, on the one hand, drives the tooth 72i of the tooth row 72 of the cam 7 and, on the other hand, determines its position relative to the movable part 4 with minimal play, in particular angularly locks it, in particular due to the interaction of the part 43 of the movable part 4, in particular the cylindrical part 43 which at least partially defines the outer periphery of the movable part 4.

[0157] For the tooth row 81 of the pinion 8 configured in this way, the lunar cam 7 may further have a tooth row 72 including teeth 72i separated by slots 73i, the format of which is derived from the step P2 of the tooth row 81. Preferably, the teeth 71i are surrounded by two second notches 72j, 72k, respectively.

[0158] The flanks 812i and 813i thus constitute the drive means and / or locking means of the elements 4 and 7, which are arranged at the same height. Such a configuration of the toothing 81 makes it possible to propose pinions formed at the same height, and therefore for stronger reasons, to arrange the toothings 42 and 72 at the same height. This has the advantage, among other things, of achieving a particularly thin calendar system 200. Furthermore, due to the asymmetric nature of the toothing 81i, the flanks 812i and 813i can be optimized with respect to their respective functions. In particular, the lead of the pinion 8 and / or cam 7 can be maximized while maintaining a proper locking function with minimal play, by avoiding any risk of these elements hitting each other.

[0159] Furthermore, the driving movable part 4, the driven movable part 7, and the intermediate pinion 8 are one or more teeth 42i of the drive toothing 42 interact exclusively with the inner flanks 812i of the tooth pairs of the pinion 8, - the outer flanks 813i of the tooth pairs of the pinion 8 interact with the flanks of the second notches 72j, 72k of the driven toothing 72, the curved profile 43 interacts exclusively with the outer side surface 813i, are arranged as follows.

[0160] In the illustrated embodiment, the tooth row 81 includes eight teeth. From a visual point of view, the tooth row 81 includes four pairs of teeth, each pair separated by a step p2, and the teeth of each pair separated by a step p1. In this case, the teeth of each pair are symmetrical with respect to a plane P81 that is perpendicular to the plane P8 and passes through the axis A8. Furthermore, the tooth row 81 exhibits four-fold rotational symmetry about the axis A8. In particular, the pair of teeth 81i exhibits four-fold rotational symmetry about the axis A8. The side surfaces 812i are symmetrical with respect to the plane P81. Similarly, the side surfaces 813i are symmetrical with respect to the plane P81.

[0161] Such a pinion 8 can, for example, drive the month cam 7 through seven angular steps of the date moving part 4, in this case from the 26th of a given month to the 2nd of the following month. Figures 17 and 18 show in detail the elements 4, 7 and 8 of the calendar system for the 26th and 27th of February, respectively. Figures 7 to 12 illustrate the state of the calendar system from February 28 to March 2.

[0162] Activating the month cam 7 before the 28th day of a given month is particularly advantageous for the implementation of semi-perpetual or perpetual calendar systems, since such a sequence makes it possible to position the cam follower 6 to lock the tooth 51 against the date moving part 4 from the 28th of February, or from the 29th of February in leap years.

[0163] More specifically, within the context of a semi-perpetual calendar system, the month cam 7 is activated every time before the 28th day of a given month. In the illustrated embodiment of the calendar system, the month cam 7 is activated when the date is changed from the 26th to the 27th of a given month. Figures 19 and 20 illustrate the configuration of the cam 7 and follower 6 for February 27 and 28, respectively. On February 27, the pin 61 of the follower 6 is in the groove 71 of the cam 7 with a first radius R1' centered on the axis A7, while on February 28, the same pin is in the groove 71 of the cam 7 with a second radius R2' centered on the same axis, thereby positioning the follower 6 to lock the tooth 51 with respect to the date moving part 4, thereby allowing the date moving part 4 to be displaced three additional steps under the influence of the protrusion 21, thereby enabling the date change from February 28 to March 1.

[0164] Thus, at the end of February in years that are not leap years, tooth 51 is activated on February 28th, enabling date movable element 4 to be displaced three additional steps under the influence of protrusion 21, thereby enabling the date change from February 28th to March 1st. At the end of months with 30 days, tooth 51 is activated on the 30th of the given month, enabling date movable element 4 to be displaced one additional step under the influence of protrusion 21. Thus, the sole action of first drive protrusion 21 on first tooth 51 displaces date movable element 4 one or more additional steps, depending on the moment at which first tooth 51 is activated by actuation systems 6, 7. Also, in a perpetual calendar, at the end of February in leap years, tooth 51 may be activated on February 29th, enabling date movable element 4 to be displaced two additional steps under the influence of protrusion 21.

[0165] Depending on the configuration and arrangement of the toothings 42, 81 and 72, the angular displacement performed by the month cam 7 under the influence of the displacement over the angular steps of the date moving part 4 may differ from one date change to another. In particular, it may be envisaged that the month cam is not driven at the date change between the 26th of a given month and the 2nd of the next month. This is the case in particular in the embodiment of the calendar system shown, where the month cam 7 is not displaced at the date change from the 28th to the 29th of a given month, as can be seen in Figures 7 and 8.

[0166] Preferentially, the month cam 7 also has a specific feature that is activated after the first day of each month, and preferably until the second day of each month, in order to properly position any indications that the month cam is responsible for facing the aperture in the dial.

[0167] Of course, the number of teeth in the toothing 81 may vary: as an alternative to the illustrated embodiment (comprising four pairs of teeth), the toothing 81 of the pinion 8 may, for example, include ten teeth, in particular five pairs of teeth.

[0168] Furthermore, like date movement 4, which is generally considered to be any moving part and not necessarily a disc, cam 7 can also be considered a moving part more generally to take into account the scenario where moving part 7 is more simply in the form of a moon wheel.

[0169] In an alternative embodiment, it is also possible to assume a date moving part 4 with internal toothing 42 and a month moving part 7 with external toothing 72. In this case, the function of the pinion 8 remains unchanged.

[0170] Depending on your preference, the driven moving part 7 is a lunar moving part, in particular a lunar cam and / or lunar display moving part, or The driving movement 4 is the date movement.

[0171] Depending on the configuration of the transmission system, the driven part 7 surrounds the driving part 4, or The driving movable part 4 surrounds the driven movable part 7.

[0172] Optionally, the driven movable element 7 is a month cam arranged to control the activation of a first tooth 51 that drives the driving movable element constituting the date movable element 4, the first tooth 51 being mounted on the date movable element 4 so as to be displaceable between a stopped or retracted position and an activated or driving position.

[0173] According to the above-mentioned solution, the drive 100 advantageously has the particular feature of including first and second drive moving parts 1, 2 kinematically connected and provided with a first protrusion and a second protrusion respectively, each having a respective axis, in particular a respective axis of rotation, that is distinct and preferentially fixed relative to the frame. Furthermore, the drive has the particular feature of including a second protrusion on the second moving part, provided for activating a tooth mounted on the date moving part in order to enable at least one additional jump of the date moving part at the end of each month having 30 days or less.

[0174] The movable placement of the toothed moving part on the date allows the programming of the annual, semi-perpetual or perpetual calendar cycle to be adjusted via a month programming cam independent of the drive, thus significantly simplifying the drive while providing better performance and reducing size. Such a solution therefore advantageously makes it possible to implement an instantaneous jump drive compatible with annual, semi-perpetual or perpetual calendar systems. Furthermore, due to its compact size, the drive can also drive other calendar displays, such as the day of the week.

[0175] Such calendar systems have the advantage that they can be implemented independently of any return or indexing springs, via a positive drive actuation system, i.e., a desmodromic system, involving cams and cam followers that regulate the programming of annual, semi-perpetual or perpetual cycles.

[0176] The implementation of the calendar system preferably has an instantaneous jump drive provided with two separate drive components. This configuration of the drive allows for a particularly versatile definition of the calendar system, in particular the simple implementation of annual or semi-perpetual calendar systems without adding or substantially changing components. Furthermore, this configuration of the drive allows for a maximum reduction in the energy loss of the oscillator, in particular within the scope of implementing an instantaneous jump semi-perpetual or perpetual calendar system.

[0177] Throughout this application, a "step" is understood to mean the angular space separating two nearby stable (or indexed) positions of a movable part.

[0178] With the exception of the immediately preceding paragraph, for the driven moving part 7 or lunar cam 7, a "step" is an angle of 30°, in particular an angle of 360° / 12, where 12 is the number of months in a year. [Explanation of symbols]

[0179] 1. Drive moving part 2. Drive moving part 3. Drive moving part 4 Date movement 6. Boot System 7. Boot System 8 Pinion 11 Drive protrusion 21 Drive protrusion 23 Drive protrusion 41 Dentition 42 Driving dentition 43 curved profile 51 First tooth 72 Driven dentition 90 Transmission System 92 Instantaneous Drive Device 199 frames 200 Clock Calendar System 300 clock movements 400 Clocks

Claims

1. A clock calendar system (200), comprising: a date moving part (4) displaceable in one step relative to the frame (199); A first driving projection (21) that drives the date moving part (4); a first tooth (51) for driving the date moving part (4), the first tooth (51) being mounted on the date moving part (4) so ​​as to be displaceable between a stopped or retracted position and an activated or driven position; an actuation system (6, 7) for actuating said first tooth (51); Including, the first drive lug (21) and the first tooth (51) are arranged so that a single movement of the first drive lug (21) on the first tooth (51) can displace the date moving part (4) through N steps, where N is an integer and N>1; Clock calendar system (200).

2. the actuation system (6, 7) is arranged so that a single movement of the first drive lug (21) on the first tooth (51) displaces the date moving part (4) through n steps, where n is an integer of any value between 1 and N depending on the moment when the first tooth (51) is actuated by the actuation system (6, 7); The clock-calendar system (200) of claim 1.

3. the actuation system (6, 7) is a desmodromic system (6, 7) including a lunar cam (7) and a cam follower (6), the desmodromic system being arranged such that at least a first position of the lunar cam (7) defines a first position of the follower (6) that allows the first tooth (51) to retract, and at least a second position of the lunar cam (7) defines a second position of the follower (6) that prevents the first tooth (51) from retracting. The clock-calendar system (200) of claim 1.

4. The month cam (7) and the date moving part (4) are coaxial. The clock-calendar system (200) of claim 3.

5. The date moving part (4) includes a second driving projection (11). The clock-calendar system (200) of claim 1.

6. The first driving protrusion (21) forms a part of a first driving movable part (2), the second driving protrusion (11) forms a part of a second driving movable part (1), and the first driving movable part (2) and the second driving movable part (1) include a first rotation axis (A2) and a second rotation axis (A1) that are separate from each other. The clock-calendar system (200) of claim 5.

7. The first driving movable part (2) and the second driving movable part (1) are kinematically connected to each other by a third driving movable part (3). The clock-calendar system (200) of claim 6.

8. The system includes an instantaneous drive device (92, 96, 97) including a spring-lever (97) and a calendar cam (96), The clock-calendar system (200) of claim 1.

9. The system includes a device (98) for holding the date moving part (4) in its position, and a device (93) for minimizing or nullifying the holding torque that holds the date moving part (4) in its position. The clock-calendar system (200) of claim 1.

10. The first driving movable part (2) includes a third protrusion (23) that drives the day moving part. The clock-calendar system (200) of claim 1.

11. the system comprises a kinematic connecting element (8) arranged so that the date moving part (4) moves a month cam (7) forming part of the actuation system (6, 7) of the first tooth (51) through 1 / m steps for at least some steps taken by the date moving part (4), where m is a real number greater than 1; The clock-calendar system (200) of claim 1.

12. said system comprises a kinematic connecting element (8) arranged so that said date moving part (4) moves a month cam (7) forming part of said actuation system (6, 7) so that said month cam (7) is displaced before or during the jump from the 27th to the 28th day of each month; The clock-calendar system (200) of claim 1.

13. A timepiece movement (300) comprising the system (200) of claim 1.

14. A watch comprising a watch movement (300) as described in claim 13.

15. 2. A method of operating the clock-calendar system of claim 1, comprising: activating the first tooth (51); including the steps The single movement of the first drive lug (21) on the first tooth (51) can displace the date moving part (4) over an amplitude of up to N steps, where N is an integer greater than 1; method.

16. said single movement of said first drive lug (21) on said first tooth (51) displaces said date moving part (4) through n steps, where n is an integer of any value between 1 and N depending on the moment when said first tooth (51) is activated by said activation system (6, 7); 16. The method of claim 15.

17. When the first tooth (51) is activated, 第一突起 (21) exposes said first tooth (51) to the mechanical action that drives said date moving part (4), and / or When the first tooth (51) is stopped, the first protrusion (21) subjects the first tooth (51) to a mechanical action that moves it back without driving the date moving part (4).

16. The method of claim 15.

18. The second drive lug (11) is arranged to interact with the teeth (41) of the date moving part (4). The clock-calendar system (200) of claim 5.

19. The calendar cam (96) is disposed on the third driving movable part (3). The clock-calendar system (200) of claim 8.

20. The device (93) for minimizing or nullifying the holding torque that holds the date moving part (4) in its position includes a cam (95) arranged on the second driving moving part (1). The clock-calendar system (200) of claim 9.

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