Movement transmission system

Abstract

To provide a simple and compact timepiece calendar system compatible with a semi-perpetual or perpetual calendar system.SOLUTION: A movement transmission system 90 for a timepiece calendar system 200 comprises: a driving mobile 4 which is pivoted about a first axis A4 and comprises a driving toothset distributed over a curved profile; a driven mobile 7 which is pivoted about a second axis A7 and comprises a driven toothset; an intermediate pinion 8 which is pivoted about a third axis A8 and comprises a toothset driven by the driving toothset and driving the driven toothset. The driving toothset, the curved profile, the driven toothset and the toothset are arranged at the same level or in the same plane, and arranged such that the driving mobile moves the driven mobile via the intermediate pinion through 1 / m steps of the driving mobile. The driving mobile is arranged to define an angular position, with minimum play, of the driven mobile via the pinion, whereas the driving mobile is in a given angular position.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a watch calendar system. The present invention also relates to a watch movement including the watch calendar system. The present invention further relates to a watch including the watch movement or the watch calendar system. The present invention further relates to a method of operating the watch calendar system or the watch movement or the watch. The present invention finally relates to a transmission system that the watch calendar system or the watch movement or the watch can include.

Background Art

[0002] Patent Document 1 discloses an embodiment of a calendar system, particularly an annual calendar system, including a drive device provided with a single and unique drive movable part. The drive movable part is provided to operate one of the 31 teeth of the date disk that enables the first jump of the date disk and enables the date to be changed regardless of the date in the month, and a first protrusion provided to operate the teeth of the protrusion movably mounted on the date disk to enable the complementary jump of the date disk at the end of a month with less than 30 days, which is angularly offset with respect to the first protrusion, and an additional protrusion. Advantageously, the drive device includes a calendar cam and an elastic lever. The interaction between the cam and the lever enables instantaneous rotation of the drive movable part, thereby enabling the date to be changed instantaneously regardless of the number of jumps performed by the date disk.

[0003] Patent Document 2 similarly discloses a drive mechanism with a single and independent drive movable part, particularly within a perpetual calendar system. This solution is difficult to implement with instantaneous jump drive mechanisms. This is because the displacement performed by the drive movable part to enable multiple jumps of the date gear when a virtual elastic lever is unwound must be maximized. The winding of the elastic lever, which should also be maximized, is performed over a limited displacement of the drive movable part, which can lead to abrupt fluctuations in torque that may result in a reduction in the amplitude of the oscillator, particularly the balance wheel-hairspring oscillator.

[0004] Therefore, it is necessary to define an instantaneous jump drive that is small yet capable of minimizing oscillator energy loss, and is particularly suitable for implementing semi-perpetual or perpetual calendars.

[0005] Patent Document 3 discloses a first drive movable part having a rotating shaft fixed to the frame, and a second drive movable part having a rotating shaft displaceable relative to the same frame, wherein the drive projection of the second movable part is provided to drive teeth fixed to the date disc. In this design, the second movable part is mounted on a lever displaceable relative to the frame to counteract a return spring that generates excessive energy consumption, which is incompatible with the implementation of an instantaneous jump drive device.

[0006] Patent Document 4 discloses a calendar system including a first drive movable part having a rotating shaft fixed to a frame, and a second drive movable part having a rotating shaft fixed to the same frame, wherein the drive projection of the second movable part is provided to drive an additional tooth fixed to a date gear. For the implementation of the calendar system described in Patent Document 4, the projection of the second movable part is mounted to be displaceable against a lunar programming cam located coaxially with the second movable part, under the influence of a return spring. On the one hand, this return spring leads to excessive energy consumption, causing torque fluctuations throughout the day, which is difficult to achieve with the implementation of an instantaneous jump drive device. On the other hand, the lunar programming cam is particularly bulky, leaving very little space for installation within the drive device for the calendar cam and elastic lever. Furthermore, the installation of the lunar programming cam located coaxially with the second movable part at least partially determines the positioning of the axis of the second movable part relative to the frame, which could be a limiting factor in optimizing the drive of the date gear under the action of the drive projection of the second movable part. Finally, the projection performs a full rotation around the lunar programming cam every day, which could lead to premature wear of the drive mechanism, especially if the second projection is elastically returned to 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 [Overview of the project] [Problems that the invention aims to solve]

[0008] The object of the present invention is to provide a clock calendar system that improves upon known systems from the prior art and solves the above-mentioned problems. In particular, the present invention proposes a simple and compact clock calendar system that functions 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 present invention, the subject matter is defined by the following proposal.

[0010] 1. A clock calendar system (200), wherein the system is A movable date unit (4) that can be displaced one step at a time relative to the frame (199), A first drive projection (21) drives the date movable part (4), A first tooth (51) that drives the date movable part (4), 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 starting system (6, 7) that activates the first tooth (51), Includes, The first drive projection (21) and the first tooth (51) are arranged such that the independent movement of the first drive projection (21) toward the first tooth (51) can displace the date movable part (4) over N steps, where N is an integer N>1, in particular N=2 or N=3. Clock calendar system (200).

[0011] 2. The activation system (6, 7) is arranged such that the independent movement of the first drive projection (21) on the first tooth (51) displaces the date movable part (4) over n steps, where n is an integer value between 1 and N, corresponding to the moment the first tooth (51) is activated by the activation system (6, 7). The clock calendar system (200) described in Proposal 1.

[0012] 3. The activation system (6, 7) is a desmodromic system (6, 7) including a lunar cam (7) and a cam follower (6), wherein the desmodromic system is 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 1 or 2.

[0013] 4. The month cam (7) and the date movable part (4) are coaxial. The clock calendar system (200) described in Proposal 3.

[0014] 5. A second drive projection (11) that drives the date movable part (4), the second drive projection (11) which is arranged to interact with the tooth row (41) of the date movable part (4), in particular the tooth row (41) having 31 teeth, A clock calendar system (200) as described in any one of proposals 1 to 4.

[0015] 6. The first drive projection (21) forms a part of the first drive movable part (2), the second drive projection (11) forms a part of the second drive movable part (1), and the first drive movable part (2) and the second drive movable part (1) preferably each include a separate first rotation axis (A2) and a second rotation axis (A1). The clock calendar system (200) described in Proposal 5.

[0016] 7. The first drive movable part (2) and the second drive movable part (1) are kinematically connected to each other by the third drive movable part (3). The clock calendar system (200) described in Proposal 6.

[0017] 8. An instantaneous drive device (92, 96, 97), in particular a spring - lever (97) and a calendar cam (96), in particular the calendar cam (96) arranged on the third drivable movable part (3), comprising an instantaneous drive device (92, 96, 97). 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 movable part (4) in its position, and a device (93) for minimizing or invalidating the holding torque for holding the date movable part (4) in its position, in particular a device (93) including a cam (95) arranged on the second drivable movable part (1). A clock calendar system (200) according to any one of Proposals 1 to 8.

[0019] 10. The first drivable movable part (2) includes a third projection (23) for driving the day - of - week movable part. A clock calendar system (200) according to any one of Proposals 1 to 9.

[0020] 11. The system includes a kinematic connection element (8) arranged such that the date movable part (4) moves the month cam (7) forming part of the starting system (6, 7) of the first tooth (51) over 1 / m steps for at least some of the steps taken by the date movable part (4), where m is a real number greater than 1, preferably between 2 and 20. A clock calendar system (200) according to any one of Proposals 1 to 10.

[0021] 12. The system includes a kinematic connection element (8) arranged such that the date movable part (4) moves the month cam (7) forming part of the starting 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 the system (200) described in any one of Proposals 1 to 12.

[0023] 14. A watch movement (400), particularly a wristwatch, comprising the system (200) described in any one of Proposals 1 to 12, and / or the watch movement (300) described in Proposal 13.

[0024] 15. A method for 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, To activate the first tooth (51), The independent movement of the first drive projection (21) on the first tooth (51) is such that the date movable part (4) can be displaced over an amplitude of up to N steps, where N is an integer N>1, in particular N=2 or N=3. A method including steps.

[0025] 16. The independent movement of the first drive projection (21) on the first tooth (51) displaces the date movable part (4) over n steps, where n is an integer of any value between 1 and N, corresponding to the moment the first tooth (51) is activated by the activation system (6, 7). The operating method described in Proposal 15.

[0026] 17. When the first tooth (51) is activated, the first projection (21) exposes the first tooth (51) to a mechanical action that drives the date movable part (4), and / or when the first tooth is stopped, the first projection (21) exposes the first tooth (51) to a mechanical action that retracts the first tooth (51) without driving the date movable part (4). Operating method as described in Proposal 15 or 16.

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

[0028] 18. A clock calendar system (200), wherein the system is A movable date unit (4) that can be displaced one step at a time relative to the frame (199), A first drive projection (21) drives the date movable part (4), A first tooth (51) that drives the date movable part (4), 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 starting system (6, 7) that activates the first tooth (51), Includes, The first drive projection (21) and the first tooth (51) are arranged such that the independent movement of the first drive projection (21) toward the first tooth (51) displaces the date movable part (4) over n steps, where n is an integer of any value between 1 and N, and N is an integer N>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 activation system (6, 7) is a desmodromic system (6, 7) including a lunar cam (7) and a cam follower (6), wherein the desmodromic system is 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) described in Proposal 18.

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

[0031] 21. A second drive projection (11) that drives the date movable part (4), the second drive projection (11) being arranged to interact with the tooth row (41) of the date movable part (4), in particular the tooth row (41) having 31 teeth, A clock calendar system (200) as described in any one of proposals 18 to 20.

[0032] 22. The first drive projection (21) forms a part of the first drive movable part (2), the second drive projection (11) forms a part of the second drive movable part (1), and the first drive movable part (2) and the second drive movable part (1) preferably each include a separate first rotation axis (A2) and a second rotation axis (A1). The clock calendar system (200) described in Proposal 21.

[0033] 23. The first axis (A2) is positioned on a first circle with a first radius (R2) centered on the axis (A4) of the movable date part (4), the second axis (A1) is positioned on a second circle with a second radius (R1) centered on the axis (A4) of the movable date part (4), 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 tooth row (41) of the movable date part (4) is preferably an internal tooth row, and the first tooth (51) is oriented inward. The clock calendar system (200) described in Proposal 22.

[0034] 24. The first drive movable part (2) and the second drive movable part (1) are kinematically connected to each other by the third drive movable part (3). The clock calendar system (200) 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), and 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) as described in any one of proposals 22 to 24.

[0036] 26. Including instantaneous drive devices (92, 96, 97), in particular a spring-lever (97) and a calendar cam (96), in particular a calendar cam (96) positioned on the third drive movable part (3), A clock calendar system (200) as described in any one of proposals 18 to 25.

[0037] 27. The system includes a device (98) for holding the date movable part (4) in that position, and a device (93) for minimizing or disabling the holding torque for holding the date movable part (4) in that position, in particular a device (93) including a cam (95) located on the second drive movable part (1), A clock calendar system (200) as described in any one of proposals 18 to 26.

[0038] 28. The first drive movable part (2) includes a third projection (23) that drives the day of the week movable part. A clock calendar system (200) as described in any one of proposals 18 to 27.

[0039] 29. A clock movement (300) comprising the system (200) described in any one of proposals 18 to 28.

[0040] 30. A watch (400), in particular a wristwatch, comprising a system (200) described in any one of Proposals 18 to 28, and / or a watch movement (300) described in Proposal 29.

[0041] 31. A method for operating a clock calendar system as described in any one of Proposals 18 to 28, or a clock movement as described in Proposal 29, or a clock as described in Proposal 30, To activate the first tooth (51), The independent movement of the first drive projection (21) on the first tooth (51) displaces the date movable part (4) over n steps, where n is an integer of any value between 1 and N, and N is an integer N>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 including steps.

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

[0043] According to a third aspect of the present invention, the subject matter is defined by the following proposal.

[0044] 33. A motion transmission system (90), in particular a motion transmission system for a clock calendar system (200), A drive movable part (4) includes a drive gear row (42) that is pivoted around a first axis (A4) and distributed across a curved profile (43), particularly a circular profile (43), The driven movable part (7), which is rotated around the second axis (A7) and includes the driven gear row (72), An intermediate pinion (8) is pivoted around a third axis (A8) and includes a tooth row (81) that is driven by the driving tooth row (42) and drives the driven tooth row (72), Includes, 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 on the same plane. The drive movable part (4), the driven movable part (7), and the intermediate pinion (8) are arranged such that the drive movable part (4) moves the driven movable part (7) via the intermediate pinion (8) over a distance of 1 / m for at least several steps of the drive movable part (4), where m is a real number greater than 1, preferably between 2 and 20, and the drive movable part (4) is positioned in a predetermined angular position, particularly via the curved profile (43), while the drive movable part (4) is positioned via the pinion (8) to allow the angular position of the driven movable part (7) to be defined with minimal play. Transmission system (90).

[0045] 34. The curved profile (43) is centered on the first axis (A4) and defines at least partially the external contour of the drive movable part (4). The communication system (90) described in Proposal 33.

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

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

[0048] 37. The pair of teeth of the tooth are configured symmetrically with respect to the plane (P81) passing through the third axis (A8) of the intermediate pinion (8). The communication system (90) described in Proposal 36.

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

[0051] 40. The drive movable part (4), the driven movable part (7), and the intermediate pinion (8) are, The one or more teeth (42i) of the drive gear row (42) exclusively interact with the inner surface (812i) of the pair of teeth of the pinion (8), The outer surfaces (813i) of the pair of teeth of the pinion (8) interact with the surfaces of the second notches (72j, 72k) of the driven tooth row (72), The curved profile (43) interacts exclusively with the outer surface (813i), They are arranged in such a way. The communication system (90) described in Proposal 38 or 39.

[0052] 41. The driven movable part (7) surrounds the driven movable part (4), or The drive movable part (4) surrounds the driven movable part (7), A communication system (90) as described in any one of proposals 33 to 40.

[0053] 42. The driven movable part (7) is a lunar movable part, in particular a lunar cam and / or a lunar display movable part, or The aforementioned drive movable part (4) is a date movable part. A communication system (90) as described in any one of proposals 33 to 41.

[0054] 43. The drive movable part (4), the driven movable part (7), and the intermediate pinion (8) are arranged so that the driven movable part (7) is driven 28 days before the month, preferably when the 26th day of the month turns to the 27th day and / or when the 27th day of the month turns to the 28th day. The communication system (90) described in Proposal 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 driven movable part, which constitutes 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. The transmission system (90) described in Proposal 42 or 43.

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

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

[0058] 47. A watch (400), in particular a wristwatch, comprising a transmission system (90) as described in any one of Proposals 33 to 44 and / or a calendar system (200) as described in Proposal 45 and / or a watch movement (300) as described in Proposal 46.

[0059] Assuming they are logically or technically compatible, all combinations of the features mentioned in the various embodiments described above are conceivable.

[0060] The attached drawing shows, as an example, one embodiment of a clock. [Brief explanation of the drawing]

[0061] [Figure 1] Figure 1 is a schematic diagram of one embodiment of a clock. [Figure 2] Figure 2 shows one embodiment of a calendar system installed in a clock. [Figure 3] Figure 3 is a top view of the drive mechanism that drives the movable part of the calendar display. [Figure 4] Figure 4 is a bottom view of the drive mechanism that drives the movable part of the calendar display. [Figure 5] Figure 5 is an exploded assembly diagram of the drive movable part. [Figure 6] Figure 6 shows one embodiment of a calendar system installed in a clock. [Figure 7] Figure 7 shows the operation of an embodiment of the calendar system. [Figure 8] Figure 8 shows the operation of an embodiment of the calendar system. [Figure 9] Figure 9 shows the operation of an embodiment of the calendar system. [Figure 10] Figure 10 shows the operation of an embodiment of the calendar system. [Figure 11] Figure 11 shows the operation of an embodiment of the calendar system. [Figure 12] Figure 12 shows the operation of an embodiment of the calendar system. [Figure 13] Figure 13 shows the operation of an embodiment of the calendar system. [Figure 14] Figure 14 shows the operation of an embodiment of the calendar system. [Figure 15] Figure 15 shows the operation of an embodiment of the calendar system. [Figure 16] Figure 16 shows the operation of an embodiment of the calendar system. [Figure 17] Figure 17 shows the operation of the motion transmission system according to the present invention. [Figure 18] Figure 18 shows the operation of the motion transmission system according to the present invention. [Figure 19] Figure 19 shows the operation of the motion transmission system according to the present invention. [Figure 20] Figure 20 shows the operation of the motion transmission system according to the present invention. [Figure 21] Figure 21 is a detailed diagram of the shape of the pinion that forms part of the motion transmission system. [Modes for carrying out the invention]

[0062] One embodiment of the clock 400 will be described in detail below with reference to Figures 1 to 21. The clock 400 is, for example, a small clock, in particular a wristwatch. The clock 400 includes a clock movement 300, which is intended to be housed in a clock casing or case to protect itself from the external environment. The clock 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 watch 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 includes, for example, one or more plates and optionally a bridge.

[0064] In the embodiments described, the calendar system is semi-perpetual and displays the date, day of the week, and month. Alternatively, the calendar may be of other types, in particular annular or perpetual calendar. The calendar system may display a different set of displays.

[0065] The clock calendar system 200 is, - A movable date section 4 that can be displaced one step at a time relative to frame 199, - Drive unit 100 and, Includes.

[0066] The drive unit 100 is - A drive projection 21 that drives the date movable part 4, - A tooth 51 that drives the date movable part 4, wherein 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, - The activation systems 6 and 7 activate tooth 51. Includes.

[0067] The date movable part 4, which may be a date disc 4 in particular, is preferably centered on the calendar system 200 or movement 300 along axis A4. The date movable part 4 includes a tooth row 41 having 31 teeth and a projection 5 that is movable on the movable part 4, and in particular rotatable on the movable part 4 about axis A5. The projection 5 includes a tooth 51 at one of its ends, in particular at the longitudinal end opposite to the end where axis A5 is located. In the first configuration of the calendar system, in particular the first configuration of the starting systems 6, 7 which may be called the stop configuration, the tooth 51 is movable relative to the movable part 4. In the second configuration of the calendar system, in particular the second configuration of the starting systems 6, 7 which may be called the start configuration, the tooth 51 is prevented from moving relative to the movable part 4.

[0068] Preferably, tooth arch 41 takes the shape of an internal tooth arch, and tooth arch 51 is oriented inward. In other words, the teeth of tooth arch 41 and tooth arch 51 are preferably oriented toward axis A4.

[0069] Advantageously, as illustrated in Figure 6, when the movement of the tooth 51 relative to the movable part 4 is prevented, particularly when movement around axis A5 is prevented, the head radius RT5 of the tooth 51 (defined from axis A4) is different from the head radius RT4 of the teeth of the tooth row 41 (defined from axis A4). Preferably, when the movement of the tooth 51 relative to the movable part 4 is prevented, particularly when movement around axis A5 is prevented, the head radius RT5 of the tooth 51 is smaller than the head radius RT4, or smaller than 0.9 × RT4. In other words, the tooth 51 protrudes beyond the tooth row 41, or is capable of protruding beyond it. Such a configuration of the tooth 51 allows for maximizing the lead of the movable part 4 when the movable part 4 is driven by the interaction between the tooth 51 and the drive unit 100. More specifically, such a configuration of the tooth 51 allows for potentially activating the movable part 4 in multiple steps when the movable part 4 is driven by the interaction between the tooth 51 and the drive unit 100.

[0070] The projection 5 is capable of interacting with the follower 6 and, in particular, with a lever 6 mounted on the frame 199 of the calendar system 200 or movement 300, so as to be rotatable around axis A6. For this purpose, the projection 5 includes a contact surface 52 provided to interact by contacting the side surface 62 of the follower 6. The follower 6 also includes a peg or pin 61, which is intended to be housed in a groove 71 within a moon cam 7, which takes an annular shape.

[0071] The sides 71a and 71b of the groove 71 of the cam 7 serve as cam profiles 71a and 71b, respectively, provided to control the position of the follower 6, and in particular the angular position of the follower 6 around axis A6, via the pin 61, independently of any return springs.

[0072] The follower 6 and cam 7 thus form part of the activation systems 6 and 7 that activate the projection 5 or teeth 51. Preferably, the follower 6 and cam 7 are - Allows movement of the projection 5 or teeth 51 around axis A5 at at least one position of the movable part 4, and - At least one position of the movable part 4, in particular at at least one position of the movable part 4 corresponding to the above-mentioned position of the movable part 4, the movement of the projection 5 or tooth 51 around the axis A5 is prevented. Define the desmodromic systems 6 and 7, which are arranged accordingly.

[0073] More specifically, at least one first position of the cam 7 defines a first position of the follower 6 that allows the projection 5 or teeth 51 to move around the axis A5 at at least one position of the movable part 4. More specifically, at least one second position of the cam 7 defines a second position of the follower 6 that prevents the projection 5 or teeth 51 from moving around the axis A5 at at least one position of the movable part 4. In the latter configuration, the teeth 51 protrude beyond the tooth row 41 in the disclosed embodiment.

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

[0075] Cam 7 is preferably centered on the calendar system 200 or movement 300 along axis A7. Therefore, axes A4 and A7 preferentially coincide. In other words, the movable part 4 and cam 7 are preferably arranged coaxially. The movable part 4 and cam 7 are advantageously connected by a transmission system, which will be described in detail below. Preferably, cam 7 includes a gear row 72 that can be periodically driven by the teeth of the gear row 42 of the movable part 4 via a pinion 8 that pivots around axis A8, as described below.

[0076] Prioritizing the shape of the external dentition, dentition 42 takes the shape of the internal dentition.

[0077] Furthermore, the calendar system 200 preferably includes a day star wheel 9 centered on the calendar system 200 or movement 300 along axis A9. Thus, axes A4, A7 and A9 preferably coincide. In other words, elements 4, 7, and 9 are preferably arranged coaxially. In particular, the day star wheel 9 includes a toothed row 91 with seven teeth.

[0078] The movable part 4 and the radial wheel 9 are angularly indexed and positioned relative to the frame 199 via jumpers 98 and 99, respectively (jumpers 98 and 99 are schematically shown in Figure 2). The cam 7 is angularly indexed relative to the frame 199 by the movable part 4 via a pinion 8. More specifically, the pinion 8 is configured such that, as described below, the cam 7 is angularly locked with minimal play when the cam 7 is not driven by one of the teeth of the gear row 42 of the movable part 4. The movable part 4 and the star wheel 9 are configured and / or arranged to be driven periodically by the drive unit 100, particularly every 24 hours. The cam 7 is configured and / or arranged to be driven periodically by the drive unit 100 via the movable part 4 and the pinion 8, at the end of each month and possibly at the beginning of each month.

[0079] Figures 3 and 4 show the top and bottom surfaces of the drive unit 100, respectively. The drive unit 100 is connected to the gear train of the movement 300 via the hour gear 201.

[0080] The drive unit 100 includes a drive movable part 1 which is provided with a drive projection 11 that pivots around axis A1 and is fixed to a gear 12 for joint rotation. The drive projection 11 is configured and / or arranged to drive the movable part 4 every 24 hours by contact, through interaction with one of the teeth of the gear row 41. Similarly, the drive projection 11 is configured to lock the movable part 4 after it has been driven. The drive is advantageously of the instantaneous type.

[0081] More specifically, the drive projection 11 includes a first, rigid portion 11a and a second, elastic portion 11b. Such a configuration of the drive projection is advantageous in that it allows for rapid correction of the date in the month, particularly after a date jump, when the projection 11 is positioned between two teeth of the tooth row 41, as disclosed in Patent Document 5.

[0082] In this case, the drive projection 11 is directed outward. In other words, as shown in Figure 6, the drive projection 11 extends radially with respect to axis A1, particularly in the direction away from axis A1, until it reaches a circle with radius RT1 centered on axis A1 (meaning the head radius). Furthermore, in this case, axis A1 is arranged on a circle with radius R1 centered on axis A4.

[0083] Similarly, the drive unit 100 includes a drive movable part 2 that pivots around axis A2 and is provided with a drive projection 21. The projection 21 is fixed to the gear 22 for joint rotation. The drive projection 21 is provided to drive the drive unit 4 by contact, through interaction with the teeth 51 of the projection 5, particularly when the follower 6 prevents the projection 5 or teeth 51 from moving around axis A5. This driving is performed at the end of each month having 30 days or less. Similarly, the drive movable part 2 is provided with a drive projection 23, which is fixed to the gear 22 for joint rotation. The drive projection 23 is provided to drive the star wheel 9 by contact, through interaction with one of the teeth of the gear row 91.

[0084] The drive projection 21 is oriented outward. In other words, as shown in Figure 6, the drive projection 21 extends radially with respect to axis A2, particularly in the direction away from axis A2, until it reaches a circle with radius RT2 centered on axis A2 (meaning the head radius). Furthermore, in this case, axis A2 is arranged on a circle with radius R2 centered on 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 × RT1, or greater than 1.8 × RT1. Also advantageously, radius R2 is different from radius R1. More specifically, radius R2 is advantageously less than radius R1, or less than 0.9 × RT1, or less than 0.8 × RT1.

[0086] Such a configuration of the drive movable part 2 ensures that the interaction between the projection 21 and the teeth 51 by contact allows the movable part 4 to be driven over one or more angular steps of the movable part 4 when the movement of the teeth 51 relative to the movable part 4 is prevented, in particular when rotation around axis A5 is prevented, whereas the configuration of the drive movable part 1 has the advantage of allowing the movable part 4 to be driven over a single and independent angular step of the movable part 4.

[0087] Advantageously, such configurations of the drive movable parts 1 and 2 interact with the movable part 4, which includes an internal tooth row 41 having a head radius RT4 and an internal tooth row 51 having a head radius RT5, respectively, and when the movement of the teeth 51 relative to the movable part 4 is prevented, in particular when rotation around axis A5 is prevented, the head radius RT5 is smaller than the head radius RT4 or smaller than 0.9 × RT4.

[0088] The lead of the movable part 4 is thus optimized to allow the projection 21 to perform up to several jumps or several angular steps through independent movement. In particular, the drive movable part 2 and the movable part 4 are arranged and / or configured to allow the movable part 4 to perform several jumps or several angular jumps through independent movement of the projection 21. "Independent movement of the projection 21" is understood to mean a partial or complete rotation by the rotational motion of the projection 21 around axis A2.

[0089] Thus, the drive projection 21 and the teeth 51 are arranged such that the movable date part 4 can be displaced over N steps by the independent movement of the drive projection 21 on the teeth 51, where N is an integer N>1, in particular N=2 or N=3.

[0090] The drive movable parts 1 and 2 are kinematically connected to each other via the drive movable part 3 of shaft A3. More specifically, the gears 12 and 22 are kinematically connected to each other via the gear 32 of the third movable part 3, which is located between gears 12 and 22 in this case. In the illustrated embodiment, shaft A3 is arranged on a circle of radius R3 centered on shaft A4. Preferably, radius R3 is different from radii R1 and R2. More specifically, radius R3 is advantageously greater than radii R1 and R2. Preferably, R3 > R1 > R2.

[0091] Similarly, the third movable part 3 includes a gear 31 fixed to gear 32 to rotate together in at least one direction of rotation, thereby enabling the gear 201 to be connected to the third movable part 3 via two pinions 202a and 202b fixed to each other. More specifically, gear 201 drives pinion 202a, pinion 202b drives gear 31, which in turn drives gear 32. Thus, gear 32 drives gears 12 and 22, particularly in the same direction of rotation.

[0092] The drive unit 100, in particular the movable parts 1, 2, and 3, are thus connected to the gear train of the movement 300 via the hour gear 201. Advantageously, the movable parts 1 and 2 are arranged on opposite sides of a plane that passes through the axis A3 of the drive movable part 3 and through the axis of the movement (coinciding with the axis A4 of the date movable part in particular).

[0093] Advantageously, the drive unit 100 includes an instantaneous drive unit 92. The instantaneous drive unit 92 mainly includes a calendar cam 96 and a lever-spring 97 that pivots on the frame 199. Preferably, the movable part 3, which can be seen more specifically in the exploded assembly view of Figure 5, includes the lever-spring 97 and the calendar cam 96 provided to interact with a roller 971 that pivots on the lever-spring 97 in particular. The cam 96 is fixed to a gear 32, among other things. The interaction between the cam 96 and the lever-spring 97 allows for instantaneous driving of the movable part 4 over at least one angular step of the movable part 4 via the drive movable parts 1 and / or 2, among other projections 11 and / or 21. Similarly, the interaction between the cam 96 and the lever-spring 97 allows for instantaneous driving of the radial wheel 9 over one angular step of the radial wheel 9 via the drive movable part 2, among other projections 23.

[0094] Advantageously, the drive unit 100 includes a one-way coupling device 94. Preferably, the third movable part 3 includes the one-way coupling device 94, thereby enabling the rotational coupling of gears 31 and 32 in a single and identical direction of rotation. The device includes a pawl 941 that pivots on gear 31, is elastically returned by a spring 942, and is capable of interacting by contacting a pin or peg 321 of gear 32. The implementation of such a coupling device, in particular, allows for modification of the calendar system 200 at any time, regardless of the prior operation of the calendar system 200 or the movement 300.

[0095] Throughout the day, the drive unit 100 accumulates elastic potential energy due to the winding of the spring 972 of the lever-spring 97 under the influence of the rotation of the cam 96, deforming the spring 972, and the cam 96 itself is driven by the movement 300 via the gear 201. When the roller 971 reaches the apex 961 of the cam 96 (as shown in Figure 4), the spring 972 transmits the accumulated energy, and thus the lever-spring 97 becomes the drive side. The lever-spring 97 drives the cam 96 over a predetermined angular range until the roller 971 is positioned within the recess 962 of the cam 96, which is made possible in particular by the unidirectional connection 94. At this stage, especially when the cam 96 is displaced under the influence of the lever 97, the drive movable part 1, which is kinematically connected to the cam 96, instantaneously drives the movable part 4 over angular steps via the interaction between the projection 11 and the teeth of the gear row 41. At the same stage, the drive movable part 2, which is similarly kinematically connected to the cam 96, instantaneously drives the movable part 4 by the interaction between the projection 21 and the teeth 51, when the movement of the teeth 51 relative to the movable part 4 is prevented, in particular when the movement of the teeth 51 around axis A5 is prevented under the influence of the start systems 6, 7.

[0096] Thus, the structure of the drive unit 100 allows the movable part 4 to be driven over one-angle steps, two-angle steps, three-angle steps, or four-angle steps for a predetermined displacement of the cam 96 under the influence of the lever 97. This is made possible by the fact that the drive unit 100 includes two separate drive movable parts 1 and 2 that pivot around two separate axes A1 and A2, and the displacement of their respective projections 11 and 21 is carried out simultaneously, and the contact between each tooth of the gear row 41 and each tooth 51 is carried out continuously. Advantageously, the axes A1 and A2 are arranged on circles having separate radii R1 and R2. Also advantageously, projection 21 has a head radius RT2 that is different from the head radius RT1 of projection 11. In particular, head radius RT2 is greater than head radius RT1. With this configuration, the drive movable part 2, in particular projection 21, can drive the movable part 4 over N steps, where N is an integer N>1, in particular N=2 or N=3.

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

[0098] Advantageously, the drive unit 100 includes a device 93 for stopping the jumper 98. The device 93 includes a jumper cam 95 configured to interact with the jumper 98 and, in particular, a roller 981 that pivots on a portion 982 forming the spring of the jumper 98. Such a device advantageously allows for reducing or eliminating the indexing or position-holding torque generated by the jumper 98 for the movable part 4 when projection 11 drives one of the teeth of the tooth row 41 and / or projection 21 drives a tooth 51, in particular when the cam 96 is driven under the influence of a lever-spring 97, in particular under the influence of a spring 972 that transmits stored energy.

[0099] The drive movable part 1 includes a cam 95 which is provided to preferentially interact with the jumper 98.

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

[0101] Such configurations of the drive movable parts 1, 2, and 3 allow for the distribution of various elements involved in the drive unit 100 and / or instantaneous drive unit 92 and / or one-way connector 94 and / or jumper stop unit 93, enabling these elements to coexist in the best possible way. This has the advantage of achieving, among other things, the implementation of a particularly thin drive unit 100 and, for stronger reasons, a particularly thin calendar system 200.

[0102] One embodiment of how to operate the calendar system 200 will be described below in several scenarios. - The last day of a month with 28 days (February), - The end of the month with 31 days (March), and - The last day of a month with 30 days (April).

[0103] <Operation at the end of February, which includes the 28th day>

[0104] Figures 7 to 11 illustrate the operation of the calendar system when the date changes at the end of February, which has 28 days. In this stage, the movable part 4 makes four jumps or movements across four angular steps. Advantageously, the movable part 4 operates under the influence of the transmission of stored energy by the spring 972 of the lever 97, which drives the calendar cam 96 and projections 11, 21 until the roller 971 is positioned in the recess 962 of the cam 96.

[0105] Figure 7 illustrates the calendar system at midnight on February 28, just before the movable part 4 jumps. In this configuration, the roller 971 begins to descend the calendar cam 96 from its apex 961, as shown in Figure 4. The projection 21 then comes into contact with the teeth 51, but the projection 11 is outside the range of the teeth 41.

[0106] In this case, the tooth 51 is prevented from moving relative to the movable part 4, particularly from moving around axis A5, under the influence of the interaction between the projection 5 and the respective surfaces 52 and 62 of the follower 6. This is made possible by the interaction between the follower 6 and the cam 7, particularly the interaction between the pin 61 and the groove 71, which positions the side surface 62 of the follower 6 so that the tooth 51 cannot retract under the operation of the projection 21. Thus, when the activation systems 6 and 7 are in this configuration, the contact between the projection 21 and the tooth 51 causes the movable part 4 to rotate around axis A4.

[0107] Figure 8 illustrates the calendar system after the projection 21 has rotated over a first angle α1 around axis A2, and the movable part 4 has been displaced over a first angular step around axis A4. Here, the projection 11 remains outside the range of the teeth 41, even though it has already rotated around axis A1.

[0108] Figure 9 illustrates the calendar system after the projection 21 has rotated over a second angle α2 around axis A2, and the movable part 4 has been displaced over a second angular step around axis A4. Here, the projection 11 remains outside the range of the teeth 41, even though it has already rotated around axis A1.

[0109] Figure 10 illustrates the calendar system after the projection 21 has rotated over a third angle α3 around axis A2, and the movable part 4 has been displaced over a third angle step around axis A4. In this configuration, projection 21 is no longer in contact with tooth 51, and projection 11 is in contact with one of the teeth of tooth row 41.

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

[0111] Figure 11 illustrates the calendar system for March 1st after the projection 11 has rotated over a first angle β1 around axis A1, and the movable part 4 has been displaced over a fourth angular step around axis A4. More specifically, Figure 11 illustrates the calendar system immediately after the date has changed, with the roller 971 positioned within the recess 962 of the cam 96. In this configuration, the projection 11 is positioned between two teeth of the gear row 41 so that the projection 11 locks the movable part 4, thereby preventing any unexpected additional jumps of the movable part. Preferably, β1 ≥ α1, α2, α3. Preferably, β1 ≤ θ.

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

[0113] When projection 23 contacts one of the teeth of the gear 91 of the star wheel 9 and drives the star wheel, the day of the week display is driven. When the date jump is performed (as shown in Figure 11), projection 23 is positioned between two teeth of the gear 91 so that projection 23 locks the star wheel 9 and prevents any unintended additional jumps of the star wheel. For example, projection 23 can contact one of the teeth of the gear 91 of the star wheel 9 when (or substantially at that time) projection 11 contacts one of the teeth of the gear 41.

[0114] During this operating phase, projection 21 displaced the movable part 4 in three steps, and projection 11 displaced the movable part 4 in one step. Just before midnight on February 28, the date movable part showed "28," and just after midnight on March 1, the date movable part showed "1." The four drive steps of the movable part enabled the following four consecutive changes in a single instantaneous drive process. - The date displayed changes from "28" to "29", and then - The date display changes from "29" to "30", and then - From displaying the date "30" to displaying the date "31", then - The date display changes from "31" to "1".

[0115] <Operation at the end of March>

[0116] Figure 13 illustrates the state of the calendar system at midnight on March 30, immediately before the jump of the movable part 4, and Figure 14 illustrates the state of the calendar system at midnight on March 31, immediately before the jump of the movable part 4.

[0117] In Figure 13, the follower 6 is positioned by the cam 7, in this case by the pin 61 and groove 71, such that the side surface 62 of the follower is outside the range of the surface 52 of the projection 5. Thus, the projection 5 is movable around axis A5, and the teeth 51 retract under the action of projection 21. Thus, projection 21 does not drive the rotation of the movable part 4 around axis A4. The movable part 4 is finally driven over a single and independent angular step around axis A4 via the interaction of projection 11 and the teeth of the gear row 41 over a first angle β1 around axis A1. The star wheel 9 itself is driven over an angular step around axis A9 under the action of projection 23.

[0118] In Figure 14, the follower 6 is positioned by the cam 7, in this case by the pin 61 and groove 71, such that the side surface 62 of the follower is outside the range of the surface 52 of the projection 5. Thus, the projection 5 is movable around axis A5, and the teeth 51 retract under the action of projection 21. Thus, projection 21 does not drive the rotation of the movable part 4 around axis A4. The movable part 4 is finally driven over a single and independent angular step around axis A4 via the interaction of projection 11 and the teeth of the gear row 41 over a first angle β1 around axis A1. The star wheel 9 itself is driven over an angular step around axis A9 under the action of projection 23.

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

[0120] <Operation at the end of April>

[0121] Figures 15 and 16 illustrate the operation of the calendar system when the date changes to the end of April. During this stage, the movable part 4 performs two jumps or moves over two angular steps.

[0122] Figure 15 illustrates the calendar system at midnight on April 30. In this case, the follower 6 is positioned by the cam 7, particularly by the pin 61 and groove 71, such that the side surface 62 of the follower 6 is in contact with the surface 52 of the projection 5. Therefore, when the projection 21 comes into contact with the teeth 51, it drives the rotation of the movable part 4 around axis A4, even if the projection 11 is outside the range of the teeth row 41.

[0123] Figure 16 illustrates the calendar system after the projection 21 has rotated over a third angle α3 around axis A2, and the movable part 4 has been displaced over a first angular step around axis A4. In this configuration, projection 21 is no longer in contact with the teeth 51, and projection 11 is in contact with one of the teeth of the gear row 41 so that it can drive the movable part 4 over a second angular step around axis A4. At this time, the star wheel 9 is also driven under the operation of projection 23.

[0124] During this operating phase, projection 21 displaced the movable part 4 in one step, and projection 11 displaced the movable part 4 in one step. Just before midnight on April 30, the date movable part showed "30," and just after midnight on May 1, the date movable part showed "1." The two drive steps of the movable part 4 enabled the following two consecutive changes in the process of one instantaneous drive. - From displaying the date "30" to displaying the date "31", then - The date display changes from "31" to "1".

[0125] At midnight on April 28, immediately before the jump of the movable part 4, the follower 6 is positioned by the cam 7, particularly by the pin 61 and groove 71, such that the side surface 62 of the follower is outside the range of the surface 52 of the projection 5. Thus, the projection 5 is movable around axis A5, and the teeth 51 retract under the action of projection 21. Thus, projection 21 does not drive the rotation of the movable part 4 around axis A4. The movable part 4 is finally driven over a single and independent angular step around axis A4 via the interaction of projection 11 and the teeth of the gear row 41 over a first angle β1 around axis A1. The star wheel 9 itself is driven over an angular step around axis A9 under the action of projection 23.

[0126] Similarly, at midnight on April 29, just before the jump of the movable part 4, the follower 6 is positioned by the cam 7, particularly by the pin 61 and groove 71, such that the side surface 62 of the follower is outside the range of the surface 52 of the projection 5. Thus, the projection 5 is movable around axis A5, and the teeth 51 retract under the action of projection 21. Thus, projection 21 does not drive the rotation of the movable part 4 around axis A4. The movable part 4 is finally driven over a single and independent angular step around axis A4 via the interaction of projection 11 and the teeth of the gear row 41 over a first angle β1 around axis A1. The star wheel 9 itself is driven over an angular step around axis A9 under the action of projection 23.

[0127] Therefore, it should be noted that the starting systems 6 and 7 are preferably arranged such that the independent movement of the first drive projection 21 on the first tooth 51 displaces the date drive unit 4 over n steps, where n is an integer of any value between 1 and N, and N is an integer N>1, in particular N=2 or N=3, depending on the moment the first tooth 51 is driven by the starting systems 6 and 7.

[0128] Therefore, it should be noted that the starting systems 6 and 7 are preferably arranged such that at least the first position of the lunar cam 7 defines the first position of the follower 6 that allows the first tooth 51 to retract, and at least the second position of the lunar cam 7 defines the second position of the follower 6 that prevents the first tooth 51 from retracting.

[0129] As described above, the present invention relates to a clock calendar system or a clock movement or a method for operating a clock, and the method includes the following steps. - Activation of the first tooth 51, - A single movement of the first drive projection 21 to the first tooth 51, which allows the date movable part 4 to be displaced over an amplitude of up to N steps, where N is an integer N>1, in particular N=2 or N=3.

[0130] Advantageously, the sole action of the first drive projection 21 on the first tooth 51 displaces the date movable part 4 over n steps, where n is an integer value between 1 and N, depending on the moment the first tooth 51 is driven by the starter systems 6, 7.

[0131] Therefore, the present invention also relates to a clock calendar system or a clock movement or a method for operating a clock, the method comprising the following steps: - Activation of the first tooth 51, - A single movement of the first drive projection 21 to the first tooth 51, which allows the date movable part 4 to be displaced over n steps, where n is an integer of any value between 1 and N, and N is an integer N>1, in particular N=2 or N=3, depending on the moment when the first tooth 51 is driven by the starting systems 6, 7.

[0132] Notwithstanding the above method, preferably, when the first tooth 51 is activated (by the control of the activation systems 6 and 7) in accordance with the above method, note that the first projection 21 exposes the first tooth 51 to mechanical action for driving the date movable part 4.

[0133] Alternatively or additionally, notwithstanding the above methods, preferably, when the first tooth 51 is stopped (by control of the starting systems 6, 7), the first projection 21 is subjected to a mechanical action to retract the first tooth 51 without driving the date movable part 4.

[0134] Thus, it is entirely possible to configure the starting systems 6 and 7 to implement an annual calendar system. In this scenario, the starting system controls the starting of the projection 51 in each month, such as months with 30 days or months with 31 days, without changing the elements of the drive unit. For this purpose, the cam 7, and in particular the groove 71, may be modified.

[0135] The month cam 7 is rotationally driven around axis A7 in the event of a specific change in the date. Therefore, the teeth 72 of the cam 7 can be periodically driven by the teeth 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 present invention, embodiments of the clock 400 or the clock movement 300 or the calendar system 200 are: - A drive movable part 4 including a drive gear row 42 that pivots around the first axis A4 and is distributed across a curved profile 43, particularly a circular profile 43, - The driven movable part 7, which is pivoted around the second axis A7 and includes a driven gear row 72, - An intermediate pinion 8 that is pivoted around the third axis A8 and includes a tooth row 81 that is driven by the drive tooth row 42 and drives the driven tooth row 72, Includes a motion transmission system 90.

[0137] Depending on preference, the curved profile 43 is centered on axis A4 and defines at least partially the external contour of the drive movable part 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 on the same plane.

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

[0140] The drive movable part 4, the driven movable part 7, and the intermediate pinion 8 are arranged such that the drive movable part 4 is in a predetermined angular position, particularly via the curved profile 43, while the drive 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 Figure 21, the pinion 8 is provided with a tooth row 81 having the specific characteristic that on the one hand it extends in a single and unique height or a single and unique plane P8, and on the other hand it includes teeth 81i that are not evenly distributed with respect to the axis A8 of the pinion.

[0142] More specifically, the dentition 81 has the characteristic of including separate first and second steps P1 and P2.

[0143] The concept of a step p between two consecutive teeth can be likened to the concept of a distance d between teeth, measured substantially perpendicularly to the axis A8, and independent of the number of teeth and / or tooth coefficients of the pinion. This distance is measurable at the head 811i of each tooth. More specifically, the distance d here corresponds to the length of the arc centered on the axis A8 that connects the heads 811i of two consecutive 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 plane P8, passing through each of the two consecutive teeth, passing through axis A8, and passing through the respective heads 811i of each tooth.

[0145] Of course, d and α are related, 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 substantially consist of a tooth 81a positioned between two teeth 81b and 81c. More specifically, teeth 81b and 81c are positioned on either side of tooth 81a in a first direction s1 and a second direction s2, respectively, with respect to tooth 81a. Tooth 81b is positioned at a first distance d1 from tooth 81a, and tooth 81c is positioned 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.

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

[0148] Similarly, by convention, in the same Figure 21, direction s1 corresponds to the counterclockwise direction, and direction s2 corresponds to the clockwise direction. Likewise, angles α1 and α2 may constitute the directional angles, and it is possible to consider α1 as positive and α2 as negative.

[0149] Thus, in effect, teeth 81b and 81a are separated by a first directional angle α1 around axis A8, and teeth 81c and 81a are separated by a second directional angle α2 around axis A8, which, unlike α1 and α2, have opposite signs.

[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 is adjacent to tooth 81a at a distance of the first step p1 in the first direction s1, and tooth 81c is adjacent to tooth 81a at a distance of the second step p2 in the second direction s2.

[0152] Therefore, the dentition 81 includes pairs of teeth. The two teeth of the same pair are separated by a distance of the first step P1, and the two teeth of two separate pairs are separated by a distance of the second step p2.

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

[0154] Advantageously, each tooth 81i is asymmetrical with respect to its own plane P81i. Therefore, each tooth 81i includes different first and second sides 812i and 813i. Such a tooth configuration allows for the optimization of the shape of each side with respect to its respective function.

[0155] In particular, each tooth 81i of the gear row 81 includes a first side surface 812i that allows, on the one hand, to be driven by the teeth 42i of the gear row 42 of the movable part 4, and on the other hand, to be driven, at least partially, by the teeth of the gear row 72i of the cam 7. Optionally, the teeth 42i are each surrounded by two notches 42j, 42k and distributed across the curved profile 43. Depending on the configuration of the cam 7, the first side surface 812i can also similarly determine the position of the cam 7, in particular by angularly locking the cam 7 with minimal play. The first side surface 812i is configured to optimize the lead of the pinion 8, in particular under the influence of the drive of the movable part 4. In particular, the shape of the side surface 812i may be optimized in great detail with respect to this embodiment.

[0156] The gear row 81 includes a second side surface 813i that, on the one hand, drives the teeth 72i of the gear row 72 of the cam 7, and on the other hand, with respect to the movable part 4, specifically angularly locks its position relative to the movable part 4 with minimal play, through the interaction of a portion 43 of the movable part 4, in particular a cylindrical portion 43 that at least partially defines the outer circumference of the movable part 4.

[0157] With respect to 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 step P2 of tooth row 81. Optionally, each tooth 71i is surrounded by two second notches 72j, 72k.

[0158] The sides 812i and 813i thus constitute the driving and / or locking means for elements 4 and 7, which are positioned at the same height. Such a configuration of the tooth row 81 makes it possible to propose pinions formed at the same height, and therefore, for stronger reasons, to position the tooth rows 42 and 72 at the same height. This has the advantage of achieving, among other things, the implementation of a particularly thin calender system 200. Furthermore, due to the asymmetric nature of the teeth 81i, the sides 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 colliding with each other.

[0159] Furthermore, the drive movable part 4, the driven movable part 7, and the intermediate pinion 8 are, - One or more teeth 42i of the drive gear row 42 exclusively interact with the inner side surfaces 812i of the pair of teeth of the pinion 8, - The outer surfaces 813i of the pair of teeth of pinion 8 interact with the sides of the second notches 72j, 72k of the driven tooth arch 72, - The curved profile 43 interacts exclusively with the external side surface 813i. They are arranged in this manner.

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

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

[0162] Activating the month cam 7 28 days before a given month is particularly advantageous for implementing a semi-perpetual or perpetual calendar system. This is because such an order allows the cam follower 6 to position the teeth 51 to engage with the date movable part 4 from February 28th, or February 29th in the case of a leap year.

[0163] More specifically, within the context of a semi-perpetual calendar system, the month cam 7 is activated each time 28 days before a given month. In the illustrated embodiment of the calendar system, the month cam 7 is activated when the date changes 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 27th and 28th, respectively. On February 27th, the pin 61 of the follower 6 is in the groove 71 of the cam 7 with a first radius R1' centered on axis A7, while on February 28th, 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 so as to engage the teeth 51 with respect to the date movable part 4, thereby allowing the date movable part 4 to be displaced over three additional steps under the influence of the projection 21, thereby enabling the date change from February 28th to March 1st.

[0164] Therefore, in a non-leap year, at the end of February, tooth 51 is activated on February 28 to allow the date movable part 4 to be displaced over three additional steps under the influence of projection 21, thereby enabling a date change from February 28 to March 1. In a month with 30 days, tooth 51 is activated on the 30th of the month to allow the date movable part 4 to be displaced over one additional step under the influence of projection 21. Therefore, the independent operation of the first drive projection 21 on the first tooth 51 displaces the date movable part 4 over one or more additional steps, depending on the moment the first tooth 51 is activated by the activation systems 6 and 7. In a perpetual calendar, in a leap year, tooth 51 may be activated on February 29 to allow the date movable part 4 to be displaced over two additional steps under the influence of projection 21.

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

[0166] Preferably, the month cam 7 also has a specific characteristic of being operated after the first day of each month, preferably until the second day of each month, in order to properly position any display that the month cam is responsible for facing the opening of the dial.

[0167] Of course, the number of teeth in the dental arch 81 may vary. As an alternative to the illustrated embodiment (which includes four pairs of teeth), the dental arch 81 of the pinion 8 may include, for example, 10 teeth, or more specifically, five pairs of teeth.

[0168] Furthermore, like the date moving part 4, which is generally considered any moving part and does not necessarily have to be a disc, the cam 7 can also be considered a moving part more generally, taking into account a scenario in which the moving part 7 is more simply in the shape of a moon gear.

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

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

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

[0172] Depending on preference, the driven movable part 7 is a month cam, which is positioned to control the activation of a first tooth 51 that drives the driven movable part, which constitutes 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.

[0173] According to the above-described solution, the drive unit 100 has the particular feature of including first and second drive movable parts 1 and 2, which are kinematically connected and each has a separate axis, in particular its rotation axis, and each has a first projection and a second projection, respectively, and is preferentially fixed to the frame. Furthermore, the drive unit has the particular feature of including a second projection on the second movable part, which is provided for acting a tooth mounted on the date movable part, in order to allow at least one additional jump of the date movable part at the end of a month having 30 days or less.

[0174] By mounting a movable part equipped with teeth on the date, it becomes possible to adjust the programming of the annual, semi-perpetual, or perpetual calendar cycle via a monthly programming cam independent of the drive unit, thereby providing better performance and allowing for a significant simplification of the drive unit while miniaturizing it. Such a solution thus advantageously enables the implementation of an instantaneous jump drive unit compatible with annual, semi-perpetual, or perpetual calendar systems. Furthermore, due to its small size, the drive unit can also drive other calendar displays, such as the day of the week display.

[0175] Such calendar systems have the advantage of being implementable independently of any return or indexing springs, via a positive-driven start system, i.e., a desmodromic system, which includes cams and cam followers that adjust the programming of annual, semi-perpetual, or perpetual cycles.

[0176] The realization of the calendar system preferably involves an instantaneous jump drive unit with two separate drive moving parts. Such a configuration of the drive unit allows for the particularly versatile definition of the calendar system, and in particular enables the simple implementation of annular or semi-perpetual calendar systems without the addition of or substantial modification of components. Furthermore, such a configuration of the drive unit allows for the maximization of oscillator energy loss, particularly in the implementation of instantaneous jump semi-perpetual or perpetual calendars.

[0177] Throughout this application, “step” is understood to mean the angular space separating two stable (or indexed) positions immediately adjacent to the movable part.

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

[0179] 1. Driven movable part 2. Driven movable part 3. Driven movable part 4th dated movable part 6. Startup System 7. Startup System 8 pinion 11 Drive protrusion 21 Drive projection 23 Drive protrusion 41 teeth 42 Driven dentition 43 Curved Profile 51 First tooth 72 Driven dentition 90 Transmission System 92 Instantaneous drive device 199 frames 200 Clock Calendar System 300 watch movements 400 Clocks

Claims

1. A motion transmission system (90), comprising: a drive moving part (4) pivoted about a first axis (A4) and including drive teeth (42) distributed over a curved 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 arrangement (81) driven by the driving tooth arrangement (42) and driving the driven tooth arrangement (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) through 1 / m steps for at least several steps of the driving moving part (4), where m is a real number greater than 1, and the driving moving part (4) is arranged such that, while the driving moving part (4) 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. Motion transmission system (90).

2. said curved profile (43) is centred on said first axis (A4) and at least partially defines the outer contour of said drive armature (4); The motion transmission system (90) of claim 1.

3. The intermediate pinion (8) includes asymmetric teeth. A motion transmission system (90) according to claim 1 or 2.

4. The intermediate pinion (8) comprises 4 or 5 pairs of teeth, A motion transmission system (90) according to claim 1 or 2.

5. The teeth of each pair of teeth are arranged symmetrically with respect to a plane (P81) passing through the third axis (A8) of the intermediate pinion (8). The motion transmission system (90) of claim 4.

6. The drive toothing (42) comprises one or more teeth (42i) surrounded by two first notches (42j, 42k) and distributed over the curved profile (43), The motion transmission system (90) of claim 1.

7. The driven tooth row (72) includes teeth (72i), each of which is surrounded by two second notches (72j, 72k); The motion transmission system (90) of claim 1.

8. 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), The driven tooth row (72) includes teeth (72i), each of which is surrounded by two second notches (72j, 72k); 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 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 tooth row (72); said curved profile (43) interacts exclusively with the outer flanks (813i) of said tooth pairs of said pinion (8); It is arranged as follows: The motion transmission system (90) of claim 1.

9. The driven movable part (7) surrounds the driving movable part (4), or The driving movable part (4) surrounds the driven movable part (7), The motion transmission system (90) of claim 1.

10. said driven moving part (7) is a lunar moving part, or The driving moving part (4) is a date moving part. The motion transmission system (90) of claim 1.

11. The driving movable part (4), the driven movable part (7), and the intermediate pinion (8) are arranged so that the driven movable part (7) is driven before the 28th day of the month. The motion transmission system (90) of claim 10.

12. The driven movable part (7) is a month cam arranged to control the activation of a first tooth (51) that drives the driving movable part, which constitutes 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. The motion transmission system (90) of claim 10.

13. A clock-calendar system (200) comprising the transmission system (90) of claim 1.

14. A clock movement (300) including a calendar system (200) as described in claim 13.

15. A watch (400) comprising a transmission system (90) according to claim 1.

16. The drive force (42) of the drive moving part (4) is distributed over a circular profile (43), The motion transmission system (90) of claim 1.

17. The driven movable part (7) is a moon cam and / or a moon display movable part. The motion transmission system (90) of claim 1.

18. The driving movable part (4), the driven movable part (7), and the intermediate pinion (8) are arranged so that the driven movable part (7) is driven when the 26th day of the month changes to the 27th day of the month and / or when the 27th day of the month changes to the 28th day of the month. The motion transmission system (90) of claim 11.

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