System for driving and maintaining the position of a mobile unit that displays time or time-derived information

Abstract

To provide a system for driving and holding in position a mobile unit for displaying time or time derivative information that makes it possible to improve systems known from the prior art, in particular, a simple and reliable system which makes it possible to limit energy necessary to perform time or time derivative information display jump.SOLUTION: A system 90 for driving and holding in position a mobile unit 50 for displaying time or time derivative information is provided, comprising: a drive device 80 for driving a mobile unit including a driving cam 13 and a driving lever 30 provided to drive a driving member 23; a device 40 for holding a mobile unit in position; a device 70 for activating and deactivating the position-holding device including a deactivation cam 22; and a device 12, 21 for mechanically coupling or synchronizing the driving cam and the deactivation cam.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a system for driving and maintaining the position of a mobile unit displaying time or time-derived information. The present invention also relates to a timepiece calendar system including such a driving and position-keeping system. The present invention also relates to a movement including such a driving and position-keeping system or such a timepiece calendar system. The present invention also relates to a timepiece including such a movement, such a driving and position-keeping system or such a timepiece calendar system. The present invention also relates to a method for operating such a timepiece, such a movement, such a driving and position-keeping system or such a timepiece calendar system. [Background technology]

[0002] Patent Document 1 discloses a date drive mechanism that releases a jumper on the date disc at the instant the date transition begins. The energy required for the date transition is stored in a return spring located between the date drive gear and the date finger. Just before midnight, i.e., before the start of the date transition, the date finger is held by the date disc, which is held by a jumper loaded by a jumper cam. The jumper cam is kinematically connected to the date drive gear, which rotates once every 24 hours. At midnight, a notch located around the jumper cam releases the jumper. At that exact moment, the energy stored in the return spring is sufficient for the date finger to overcome the jumper, driving the date disc to the next day.

[0003] Because it is connected to the date drive wheel, the rotation of the jumper cam is a dragging rotation, and the jumper cannot be instantly reloaded after the date transition. This results in a deterioration of the calendar's functionality and potentially perceptible angular play of the date disc due to the time required for the jumper to be reloaded by the jumper cam. Such play is unacceptable in a luxury watch. Furthermore, in certain cases where rapid date setting is possible, such a jumper and jumper cam arrangement may malfunction and / or fail to generate the expected torque, which may impair the tactile quality of the knob.

[0004] Patent Document 2 discloses a calendar system capable of displaying the date and day of the week. The system includes a date disc driven by a date finger fixed to an energy storage gear and a day disc including a Maltese cross driven by a pin. The pin is also fixed to the energy storage gear. The energy storage gear is coaxial with a calendar drive gear that rotates once every 24 hours. A spring disposed between the calendar drive gear and the energy storage gear allows for the storage of energy required for instantaneous transitions of the date and day of the week display. Both the energy storage gear and the calendar drive gear are driven by an hour gear at two different heights with different transmission ratios. The energy storage gear rotates more slowly than the calendar drive gear. The relative speed between the two gears allows for the loading of a return spring. Part of the tooth arrangement is chamfered on the outer periphery of the energy storage gear. This allows the energy storage gear to rotate independently of the drive gear at midnight, thereby restoring the stored energy via the return spring and instantly driving the display. More specifically, the date finger drives the date disc one pitch, and at the same time, a pin drives a Maltese cross, which is fixed to the day disc, by the same pitch. Furthermore, the Maltese cross also controls the loading of a jumper that indexes the date disc. In this way, during the date transition, the jumper is released to minimize the energy required for the date transition. The use of a Maltese cross to control the date jumper is not optimal in terms of the integration of this solution into the movement.

[0005] Patent Document 3 also discloses a calendar mechanism that allows the display of both the date and the day of the week. The mechanism includes a drag calendar driver with two coaxial, overlapping jumper cams, which controls the loading (or latching) of a jumper that simultaneously indexes the date and day of the week display. The first jumper cam includes a cavity in its outer profile shaped to release (or disengage) the elastic portion of the jumper upon the date transition. After the jump, the jumper is loaded (or latched) by a second cam, whose outer profile includes a pawl that acts to latch the other rigid portion of the jumper onto the teeth of the display. Thus, the jumper is fully latched for several hours after the date transition until the elastic portion of the jumper again cooperates with the outer profile of the first jumper cam and the other rigid portion of the jumper is released by the second jumper cam. This mechanism has the disadvantage of requiring two cams or at least two cam heights to control the loading and releasing of the jumper. Furthermore, the mechanism is configured to latch the jumper, i.e. to completely fix the jumper in place, which necessarily creates a non-correction range when the calendar mechanism is equipped with a correction device that includes a quick corrector for the date display and / or the day display. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Swiss Patent Application Publication No. 525507 [Patent Document 2] U.S. Patent No. 4,240,249 [Patent Document 3] Swiss Patent Application Publication No. 591720 [Patent Document 4] European Patent Application Publication No. 2428855 [Patent Document 5] International Publication No. 2013 / 102600 [Patent Document 6] European Patent Application Publication No. 1596261 Summary of the Invention [Problem to be solved by the invention]

[0007] The object of the present invention is to provide a system for driving and maintaining the position of a mobile unit displaying time or time-derived information, which allows improving the systems known from the prior art. In particular, the present invention proposes a simple and reliable system that makes it possible to limit the energy required to perform jumps in the display of time or time-derived information. [Means for solving the problem]

[0008] The drive and position-keeping system according to the invention is defined in claim 1.

[0009] Various embodiments of the system are defined in claims 2 to 8.

[0010] The clock calendar system according to the present invention is defined in claim 9.

[0011] The movement according to the invention is defined in claim 10.

[0012] The timepiece according to the invention is defined in claim 11.

[0013] The operating method according to the invention is defined in claim 12.

[0014] Various embodiments of the method are defined in claims 13 to 15.

[0015] The accompanying drawings illustrate two embodiments of the watch. [Brief explanation of the drawings]

[0016] [Figure 1] FIG. 1 is a diagram of a first embodiment of the timepiece. [Figure 2] FIG. 2 is a perspective view of the calendar system of the first embodiment. [Figure 3] FIG. 3 is a perspective view of the calendar system of the first embodiment. [Figure 4] FIG. 4 is an exploded perspective view of the intermediate drive mobile unit of the calendar system of the first embodiment. [Figure 5] FIG. 5 is a vertical cross-sectional view of the intermediate drive mobile unit of the calendar system of the first embodiment. [Figure 6] FIG. 6 is a top view of the intermediate drive mobile unit of the calendar system of the first embodiment. [Figure 7] FIG. 7 is an exploded perspective view of the driving mobile unit of the calendar system of the first embodiment. [Figure 8] FIG. 8 is a vertical cross-sectional view of the driving mobile unit of the calendar system of the first embodiment. [Figure 9] FIG. 9 is a top view of the driving mobile unit of the calendar system of the first embodiment. [Figure 10] FIG. 10 is a partial explanatory diagram of the operation of the calendar system of the first embodiment. [Figure 11] FIG. 11 is a partial explanatory diagram of the operation of the calendar system of the first embodiment. [Figure 12] FIG. 12 is a partial explanatory diagram of the operation of the calendar system of the first embodiment. [Figure 13] FIG. 13 is a partial explanatory diagram of the operation of the calendar system of the first embodiment. [Figure 14] FIG. 14 is a partial explanatory diagram of the operation of the calendar system of the first embodiment. [Figure 15] FIG. 15 is a partial explanatory diagram of the operation of the calendar system of the first embodiment. [Figure 16] FIG. 16 is a partial explanatory diagram of the operation of the calendar system of the first embodiment. [Figure 17] FIG. 17 is a partial explanatory diagram of the operation of the calendar system of the first embodiment. [Figure 18] FIG. 18 is a partial explanatory diagram of the operation of the calendar system of the first embodiment. [Figure 19]FIG. 19 is a partial explanatory diagram of the operation of the calendar system of the first embodiment. [Figure 20] FIG. 20 is a diagram of a second embodiment of the timepiece. [Figure 21] FIG. 21 is a perspective view of the calendar system of the second embodiment. [Figure 22] FIG. 22 is a perspective view of the calendar system of the second embodiment. [Figure 23] FIG. 23 is an exploded perspective view of a driving mobile unit of the calendar system of the second embodiment. [Figure 24] FIG. 24 is a vertical cross-sectional view of a driving mobile unit of the calendar system of the second embodiment. [Figure 25] FIG. 25 is a top view of the driving mobile unit of the calendar system of the second embodiment. [Figure 26] FIG. 26 is a partial explanatory diagram of the operation of the calendar system of the second embodiment. [Figure 27] FIG. 27 is a partial explanatory diagram of the operation of the calendar system of the second embodiment. [Figure 28] FIG. 28 is a timing diagram illustrating the activation of elements of the clock in the implementation of the method of operation of the calendar system according to the invention. [Figure 29] FIG. 29 is a timing diagram illustrating the activation of elements of the clock in the implementation of the method of operation of the calendar system according to the invention. [Figure 30] FIG. 30 is a diagram showing a modified example of the calendar system according to the present invention. [Figure 31] FIG. 31 is a diagram showing a modified example of the calendar system according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0017] A first embodiment of a watch 120 is described below with reference to FIGS.

[0018] The timepiece 120 is, for example, a small timepiece, in particular a wristwatch.

[0019] The watch 120 includes a watch movement 110 that is intended to be mounted within a watch case for protection from the external environment.

[0020] The watch movement 110 may be an electronic movement or a mechanical movement, especially an automatic movement.

[0021] The clock movement 110 includes a clock system 100, in particular a clock calendar system 100. The calendar system is, for example, a basic calendar system or an annual calendar system or a semi-perpetual calendar system or a perpetual calendar system.

[0022] The clock calendar system 100 includes: - a mobile unit 50 for displaying time or time-derived information; a system 90 for driving and maintaining the position of the mobile unit 50; Includes:

[0023] The time or time-derived information display mobile unit 50 may be any type of time or time-derived information display mobile unit. In particular, the time or time-derived information display mobile unit may be: - Date display mobile unit, or - Day of the week display mobile unit, or - Moon display mobile unit, or - Year display mobile unit, or - Hour display mobile unit, or - minute display mobile unit, may be.

[0024] In the illustrated embodiment, the mobile unit is a date display mobile unit.

[0025] The system 90 for driving and maintaining the position of the mobile unit 50 includes: a device 80 for driving the mobile unit 50, including a drive cam 13 or instantaneous jump cam 13 and a drive lever 30, provided for driving the drive member 23; - a device 40 for maintaining the position of the mobile unit 50; a device 70 for activating and deactivating the position-keeping device 40, including a deactivation cam 22 or a jumper cam 22; and - a device 12, 21 for mechanically coupling or synchronizing the drive cam and the deactivation cam; Includes:

[0026] In a more structural definition, the system 90 that drives and maintains the position of the mobile unit 50 is: an intermediate drive mobile unit 10, including a drive gear 11, a drive cam 13 or an instantaneous jump cam 13, a one-way connecting device 14 and a first intermediate drive gear 12; a drive mobile unit 20 including a second intermediate drive gear 21, a deactivation cam 22 or jumper cam 22 and a drive member 23; an energy accumulator including, inter alia, a spring 30a fixed to the drive lever 30 and a runner 31 mounted on the drive lever 30 and intended to cooperate with the instantaneous jump cam 13; a device 40 for maintaining the position of the mobile unit 50, for example consisting of a jumper 40 that allows the tooth row 50a of the mobile unit 50 to be indexed by the beak 42; Includes:

[0027] Therefore, in the first embodiment, the drive device 80 includes a drive gear 11 and one-way connecting devices 14 , 15 , 16 , 17 , 18 that connect the drive gear 11 and the drive cam 13 .

[0028] The intermediate drive mobile unit 10 pivots about an axis A1.

[0029] The drive mobile unit 20 pivots about an axis A2 that is parallel or substantially parallel to the axis A1.

[0030] The elastic return of the actuating lever 30 is ensured by a spring 30a, which here forms part of the actuating lever 30. Alternatively, the two may be two separate parts.

[0031] The mobile unit 50 may include a date display disc 50 which pivots about an axis A5 parallel or substantially parallel to the axis A1.

[0032] Jumper 40 is a jumper body 40b including an end on which the beak 42 is located; - a spring 40a; a runner 41, pivoted on one end of the spring, intended to cooperate with the jumper cam 22; may include:

[0033] The drive gear 11 of the intermediate drive mobile unit 10 is constantly driven by the hour gear of a basic movement (not shown) to perform one rotation per 24 hours. The drive gear 11 drives a first intermediate drive gear 12 via a one-way connection device 14. More specifically, as shown in FIGS. 4, 5, and 6, the one-way connection device 14 includes a click member 15 that rotates around a pivot 17 fixed to the drive gear 11. A spring 16 tends to maintain one end of the pawl member 15 outside the drive gear 11 so that the drive gear 11 can drive a stud 18 or pin fixed to the first intermediate drive gear 12 in a first direction of rotation. The click member 15 is also configured to retract from the stud 18 so as not to drive the first intermediate drive gear 12 in a second direction of rotation, e.g., when setting the time counterclockwise. This type of one-way connection device 14 is disclosed, inter alia, in U.S. Pat. No. 5,529,499.

[0034] The first intermediate drive gear 12 is fixed to the instantaneous jump cam 13, which, in association with the drive lever 30 and its spring 30a, can daily store the energy required for its instantaneous date transition. For example, the instantaneous jump cam 13 can be fixed or mounted via a rigid joint on the first intermediate drive gear 12. In particular, the instantaneous jump cam 13 can be driven into the first intermediate drive gear 12. A runner 31, mounted to pivot on the drive lever 30, ensures cooperation between the drive lever 30 and the instantaneous jump cam 13. The runner 31 reduces friction between the drive lever 30 and the instantaneous jump cam 13, thereby reducing energy consumption and amplitude losses of the regulating element of the basic movement. The spring 30a tends to hold the runner 31 against the instantaneous jump cam 13. The drive lever 30 includes two ends intended to be connected to the movement frame by pivot links, and is configured to store energy in the elastic part of the spring 30a. This lever structure advantageously allows the elastic part of the spring to be accommodated within a given mounting area while limiting the mechanical stresses that occur when the spring is loaded. Such an arrangement of the spring 30a is disclosed, inter alia, in patent document 5.

[0035] The first intermediate drive gear 12, through its tooth arrangement, drives the second intermediate drive gear 21 of the driving mobile unit 20. The second intermediate drive gear 21 is fixed to a jumper cam 22 and supports a drive member 23.

[0036] As shown in Figures 7, 8 and 9, the drive member 23 includes a first member 24, such as a rigid claw, and a second elastic member 25, such as a claw mounted on an elastic support or elastic claw, intended to cooperate with the tooth arrangement 50a of the mobile unit 50.

[0037] The position-keeping device 40 makes it possible to index the toothing 50a via the beak 42. The spring 40a is arranged to return the beak 42 into the toothing 50a. The respective configurations of the beak 42 and the toothing 50a, as well as the loading of the spring 40a, define a determining torque about the axis A5 of the mobile unit or disc 50. This torque is determined to maintain the position of the disc 50, in particular in the event of a shock of a given intensity. Of course, the greater the loading of the spring 40a, the greater this torque will be, regardless of the respective configurations of the beak 42 and the toothing 50a, which has a direct impact on the energy consumption of the movement and its chronometric performance.

[0038] Advantageously, the degree of loading of the spring 40a is controlled here by the activation and deactivation device 70 of the position-keeping device 40. In particular, the cooperation of the runner 41 with the profile of the jumper cam 22 makes it possible to adjust the loading of the spring 40a, notably as a function of the shape and angular position of the outer profile of said jumper cam 22, which angular position is advantageously linked to the angular position of the instantaneous jump cam 13 via the mechanical coupling devices 12, 21. Thus, with such a system for driving and maintaining the position of the mobile unit 50, the degree of loading of the spring 40a, and by extension the torque generated by the spring, can be controlled or adjusted synchronously with the driving of the mobile unit 50.

[0039] The instantaneous jump cam 13 includes a loading profile 13a, an instantaneous jump profile 13b, and a stop profile 13c, which are intended to cooperate successively with the runner 31 of the drive lever 30, as shown in Figure 3. As shown in Figures 10 and 11, during the loading step, the runner 31 is positioned on the loading profile 13a. This profile makes it possible to load the spring 30a in order to store the energy required for the instantaneous drive of the mobile unit 50, for example, during a date transition. In summary, the instantaneous jump cam 13 is connected to the first intermediate drive gear 12, which includes the stud 18, and this assembly is driven by the drive gear 11 via the one-way connection device 14 during the loading step. In this way, the energy required to load the spring 30a is obtained directly from the basic movement. Advantageously, the arrangement of the energy storage device in conjunction with the configuration of this charging profile 13a of the instantaneous jump cam 13 makes it possible to minimize and match the energy consumption of the basic movement so as to cause the regulating element to produce the same, or substantially the same, amplitude loss during this charging step, or at least during a large part of this step. The arrangement of the instantaneous jump cam 13 makes it possible, among other things, to charge the spring 30a at the same time that the instantaneous jump cam 13 is again driven after the date transition. This makes it possible to distribute the energy consumption over a maximized time period and minimize the amplitude loss of the regulating element as much as possible.

[0040] As mentioned above, the jumper cam 22 is kinematically connected to the instantaneous jump cam 13 via the first and second intermediate drive gears 12, 21. The jumper cam 22 comprises an outer profile 22a, a release profile 22b, an inner profile 22c, and a loading profile 22d intended to cooperate in succession with a runner 41 arranged at one end of the spring 40a of the jumper 40. The runner 41 cooperates with the instantaneous jump cam 13, making it possible to reduce friction in contact with the jumper cam 22. During the loading step, when the instantaneous jump cam 13 is driven by the drive gear 11 and the runner 31 of the drive lever 30 is on the loading profile 13a of the instantaneous jump cam 13, the runner 41 of the jumper 40 is located exclusively on the outer profile 22a. The outer profile 22a is concentric with the axis A2 and is configured to keep the spring 40a loaded to provide a nominal torque for indexing or holding the position of the mobile unit 50.

[0041] The loading step ends when the runner 31 reaches the end of the loading profile 13a adjacent to the instantaneous jump profile 13b. This end is referred to as the "cam apex." Therefore, the moment the runner reaches the "cam apex" marks the end of the loading step and the beginning of the instantaneous jump step. Therefore, the transition between the loading and instantaneous jump steps is instantaneous.

[0042] During this instantaneous jump step, all of the energy required for the date transition, stored by the spring 30a of the energy storage device, is restored for instantaneous driving of the mobile unit 50. In other words, during this instantaneous jump step, the instantaneous jump cam 13 becomes a power transmission unit while the energy stored by the spring 30a is restored. More specifically, during this instantaneous jump step, the drive cam 13 is driven by the drive lever 30 under the influence of the spring 30a. The drive cam 13 then drives the first and second intermediate drive gears 12 and 21, and the drive member 23 then drives the toothing 50a for the date transition. During this instantaneous jump step, the one-way connecting device 14 decouples all of the downstream chains of the device from the basic movement, allowing the instantaneous jump cam 13 to become a power transmission unit. The angular distance traveled by the drive member 23 thereafter has an angle defined by the shape of the instantaneous jump cam 13 and corresponds to the lead required to drive the toothing 50a.

[0043] During this instantaneous jump step, the jumper 40 is released just before the mobile unit 50 is driven and is instantly reloaded just before the step ends, thereby reducing the energy consumption required for the date transition without compromising the indexing of the mobile unit 50.

[0044] More specifically, the instantaneous jump step includes several successive sub-steps or steps, which are described below.

[0045] The instantaneous jump step first includes a first approaching substep in which the runner 31 begins moving from the "cam apex" on the instantaneous jump profile 13b of the instantaneous jump cam 13. During this first approaching substep, the drive member 23 has not yet contacted the tooth row 50a of the mobile unit 50. Therefore, the mobile unit 50 is not yet driven. During this first approaching substep, the jumper 40 is released to reduce the torque it generates and, as a result, the energy required to drive the mobile unit 50 during the second drive substep described below. During this first approaching substep, the runner 41 moves along the release profile 22b to reach the inner profile 22c of the jumper cam 22. This inner profile 22c corresponds to the minimum loading degree of the jumper 40. This minimum loading degree allows for defining a reduced torque for indexing or holding the mobile unit in position, which is particularly advantageous in the second drive step. The end of the first approaching sub-step is illustrated in FIGS. 14 and 15 and coincides with the moment when the drive member 23 begins to contact the tooth row 50 a of the mobile unit 50 .

[0046] During the second driving sub-step, the driving member 23 drives the tooth row 50a. This driving is carried out in optimal conditions from an energy point of view, since the jumper 40 has already been released during the first approaching sub-step. Preferentially, the jumper is released until the moment when the beak 42 of the jumper 40 reaches or substantially reaches the apex of the tooth row 50a. This configuration is illustrated in Figures 16 and 17. Here, the runner 41 contacts the inner part 22c, and this configuration is the least loaded with the jumper 40.

[0047] The third, stopping substep consists of completing the leading of the tooth row 50a and stopping the mobile unit 50. During this third, stopping substep, the beak 42 descends along the tooth row 50a under the influence of the restoration of the deformation energy of the spring 40a to contribute to driving the mobile unit 50 to its final position. This minimizes the energy required for its drive. During this third, stopping substep, when less energy is required to drive the disk, the jumper 40 is reloaded. To this end, the runner 41 moves along the loading profile 22d of the jumper cam 22 to reach the outer profile 22a, thereby defining the configuration in which the spring 40a is fully loaded, as shown in Figures 18 and 19.

[0048] The third, stopping substep ends when the runner 31 begins to contact the stopping profile 13c. Preferentially, at this moment, the drive member 23 is still in the path of the tooth row 50a. In this way, the drive member 23 serves as a movement end abutment for the mobile unit 50, preventing the mobile unit 50 from being able to perform an undesired jump due to its inertia and the considerable energy released in the instantaneous jump step. For this reason, the positioning torque of the drive mobile unit 20 induced by the stopping profile 13c must be large enough to hold the mobile unit 50 at the end of the date transition.

[0049] Thus, at the end of the instantaneous jump step, in particular at the end of the third, stopping sub-step, when the runner 31 is positioned on the stopping profile 13c, the drive member 23 is still positioned in the path of the tooth row 50a.

[0050] In summary, each 24-hour period includes a loading step and an instantaneous jump step, which itself consists of a first approach sub-step followed by a second drive sub-step followed by a third stop sub-step. In other words, the instantaneous jump step corresponds to a succession of the first, second, and third sub-steps.

[0051] As previously mentioned, the chain downstream of the one-way connector 14 is decoupled from the drive gear 11 during the instantaneous jump step. As a result, after the date transition, the drive gear 11, together with its one-way connector 14, captures the stud 18 fixed to the first intermediate drive gear 12 and the instantaneous jump cam 13, so as to enable the energy storage device to be recharged and a new charging step to be initiated. This capture lasts for the time required for the one-way connector 14 to travel through an angular range defined by the shape of the instantaneous jump cam 13, which is configured to enable proper leading of the mobile unit 50.

[0052] The loading step here extends over a duration significantly longer than the duration of the instantaneous jump step; the instantaneous jump step, in particular all of its constituent sub-steps, extend over a duration of a fraction of a second, while the loading step extends over a duration of an hour or more.

[0053] As previously mentioned, the position-keeping device 40 can thus be operated based on various substeps by the activation and deactivation device 70. The fourth substep of deactivating the position-keeping device 40 by the activation and deactivation device 70 is applied during the momentary jump step of the drive device 80, more specifically during the first, approach substep of the drive device 80. The fifth substep of activating the position-keeping device 40 by the activation and deactivation device 70 is also applied during the momentary jump step of the drive device 80, more specifically during the third substep of stopping the drive device 80.

[0054] Thus, the drive and positioning system 90 enables the following operational steps: - the step of loading the drive unit 80; a step of instantaneous jump of the drive 80, which is decomposed into the following different substeps: - a first approach substep, - a second, driving substep; - a third, stopping substep; a fourth substep of deactivating the position-keeping device 40 by the activation and deactivation device 70; a fifth substep of activating the position-keeping device 40 by the activation and deactivation device 70;

[0055] A second embodiment of the watch 120' is described below with reference to Figures 20 to 27.

[0056] The timepiece 120' is, for example, a small timepiece, in particular a wristwatch.

[0057] The watch 120' includes a watch movement 110' that is intended to be mounted within a watch case to protect it from the external environment.

[0058] The watch movement 110' may be an electronic movement or a mechanical movement, in particular an automatic movement.

[0059] The clock movement 110' includes a clock system 100', in particular a clock calendar system 100'. The calendar system may be, for example, a basic date system or an annual calendar system or a semi-perpetual calendar system or a perpetual calendar system.

[0060] The clock calendar system 100' includes: a mobile unit 50' that displays time or time-derived information; a system 90' for driving and maintaining the position of the mobile unit 50'; Includes:

[0061] The time or time-derived information display mobile unit 50' may be any type of time or time-derived information display mobile unit. In particular, the time or time-derived information display mobile unit may be: - Date display mobile unit, or - Day of the week display mobile unit, or - Moon display mobile unit, or - Year display mobile unit, or - Hour display mobile unit, or - minute display mobile unit, It may be.

[0062] In the illustrated embodiment, the mobile unit is a date display mobile unit.

[0063] The system 90' for driving and maintaining the position of the mobile unit 50' includes: a device 80' for driving the mobile unit 50', including a drive cam 13' or an instantaneous jump cam 13' and a drive lever 30, provided for driving the drive member 23'; a device 40' for maintaining the position of the mobile unit 50'; a device 70' for activating and deactivating the position-keeping device 40', including a deactivation cam 22' or a jumper cam 22'; and a device 18' for mechanically coupling or synchronizing the drive cam and the deactivation cam; Includes:

[0064] The second embodiment is similar to the first embodiment, primarily or exclusively: an activation and deactivation device 70', in particular a jumper cam 22'; - Instant Jump Cam 13' and The difference is that they are coaxial.

[0065] More specifically, compared to the first embodiment, the second embodiment does not include an intermediate drive mobile unit 10, but includes a single drive mobile unit 20' in which the jumper cam 22' and the instantaneous jump cam 13' are directly integrated without being connected by the first and second intermediate drive gears 12, 21.

[0066] Preferably, other than these few modifications, all the rest of the system according to the second embodiment operates in the same way as the first embodiment, whether it be the energy storage or the mobile unit drive and indexing stages.

[0067] In a more structural definition, the system 90' that drives and maintains the position of the mobile unit 50' is: a drive mobile unit 20' including a drive gear 11' provided with an elliptical notch 11a', an instantaneous jump cam 13', a jumper cam 22' and a drive member 23'; an energy accumulator including, inter alia, a spring 30a' fixed to the drive lever 30' and a runner 31' mounted on the drive lever 30' and intended to cooperate with the instantaneous jump cam 13'; a device 40' for maintaining the position of the mobile unit 50', for example consisting of a jumper 40' that allows the tooth row 50a' of the mobile unit 50' to be indexed by the beak 42'; Includes:

[0068] Therefore, in the second embodiment, the drive device 80' includes a drive gear 11' and mechanical connections 11a', 18' connecting the drive gear 11' and the drive cam 13'. Advantageously, the mechanical connections 11a', 18' provide rotational play around the rotation axis A2' of the drive gear 11' and / or the drive cam 13' with an angular width corresponding to the angular range of the elliptical notch 11a'.

[0069] The elastic return of the drive lever 30' is ensured by a spring 30a', which here forms part of the drive lever 30'. Alternatively, they may be two separate parts.

[0070] The mobile unit 50' may include a date display disc 50' that pivots about an axis A5' that is parallel or substantially parallel to the axis A2'.

[0071] Jumper 40' is a jumper body 40b' including an end on which the beak 42' is located; a spring 40a'; a runner 41', pivoted on the end of the spring, intended to cooperate with the jumper cam 22'; may include:

[0072] The drive gear 11' of the drive mobile unit 20' is constantly driven by the hour gear of the basic movement (not shown) to complete one rotation per 24 hours. However, unlike the intermediate drive mobile unit 10 of the first embodiment, the drive gear 11' does not include a one-way connection device. Nevertheless, the chain located downstream of the drive gear 11' still has a degree of freedom in rotation relative to the drive gear 11' due to the arrangement of an elliptical notch 11a' intended to cooperate with a jumper cam 22', an instantaneous jump cam 13', and a stud 18' fixed to the drive member 23'. The elliptical notch 11a' follows a portion of a circle coaxial with the axis A2', allowing the stud 18' and the parts fixed thereto to advance through an angular range defined by at least the shape of the instantaneous jump cam 13'. This angular range is defined to allow for the appropriate leading of the drive member 23' for the date transition. This degree of freedom therefore allows the drive member 23' to be decoupled from the drive gear 11' and from the basic movement during the instantaneous jump step.

[0073] As in the first embodiment, the drive lever 30' and jumper 40' cooperate with the instantaneous jump cam 13' and jumper cam 22', respectively, via their respective runners 31' and 41'. As shown in detail in FIGS. 23, 24, and 25, the instantaneous jump cam 13' and jumper cam 22' each include the same profiles as those in the first embodiment: the outer profile 22a', the release profile 22b', the inner profile 22c', and the loading profile 22d' for the jumper cam body 22', and the loading profile 13a', the instantaneous jump profile 13b', and the stopping profile 13c' for the instantaneous jump cam 13'. The drive member 23' operates in a similar manner and includes the same components as that in the first embodiment. More specifically, the drive member includes a first member 24', such as a rigid pawl, and a second, resilient member 25' that drives the tooth row 50a'.

[0074] During the loading step, the drive gear 11' drives the jumper cam 22', the instantaneous jump cam 13', and the drive member 23' through cooperation of the elliptical notch 11a' and the stud 18'. As in the first embodiment, the runner 31' of the drive lever 30' is positioned on the loading profile 13a' of the instantaneous jump cam 13' during the loading step, and the runner 41' of the jumper 40' is positioned on the outer profile 22a' of the jumper cam 22'. This allows the jumper 40' to be optimally loaded during the loading step.

[0075] As in the first embodiment, the loading step ends when the runner 31' reaches the end of the loading profile 13a' adjacent to the instantaneous jump profile 13b'. This moment marks the end of the loading step and the start of the instantaneous jump step. This position at the "cam apex" is illustrated in Figures 26 and 27. At this moment, the instantaneous jump cam 13' becomes the power transmission part, and the runner 31' moves instantaneously along the instantaneous jump profile 13b' until it reaches the stop profile 13c'. All of the energy necessary for the date transition, which was previously stored by the energy storage device during the loading step, is restored for the instantaneous drive of the date display mobile unit 50'. During this instantaneous jump step, the drive member 23', the jumper cam 22', and the instantaneous jump cam 13' move forward freely and instantaneously thanks to the degree of rotation given to the stud 18' in the elliptical notch 11a'. Here, the angular amplitude of the elliptical notch 11a' is large enough to allow the drive member 23' to travel through an angular range defined by the shape of the instantaneous jump cam 13', more specifically, by the shape of the profile 13b' of the instantaneous jump cam 13'.

[0076] As with the first embodiment device, spring 40a' of jumper 40' is released during the first, approach sub-step of the instantaneous jump step of drive unit 80' to reduce energy consumption during the second, drive sub-step of the instantaneous jump step of drive unit 80'. Spring 40a' is then reloaded during the third, stop sub-step of drive unit 80' such that spring 40a' is reloaded at the end of the instantaneous jump step of drive unit 80'.

[0077] After the date transition, the stud 18' is captured by the elliptical notch 11a' of the drive gear 11'. This capture continues for the time required for the elliptical notch 11a' to capture the angular range traveled by the drive member 23' required to lead the mobile unit 50'. When the elliptical notch 11a' again comes into contact with the stud 18', the system starts a new charging step, i.e., the charging profile 13a' of the instantaneous jump cam 13' resumes the energy storage by loading the spring 30a' of the drive lever 30'.

[0078] As previously mentioned, and in a similar manner to the position-keeping device 40 of the first embodiment, the position-keeping device 40' can be activated according to different substeps of the activation and deactivation device 70'. The fourth substep of deactivating the position-keeping device 40' by the activation and deactivation device 70' is applied in the instantaneous jump step of the drive device 80', more specifically in the first substep of approaching the drive device 80'. The fifth substep of activating the position-keeping device 40' by the activation and deactivation device 70' is also applied in the instantaneous jump step of the drive device 80', more specifically in the third substep of stopping the drive device 80'.

[0079] Thus, the drive and positioning system 90' includes the following operational steps: - the step of loading the drive 80'; a step of instantaneous jump of the drive 80', decomposed into the following different substeps: - first substep of approach, - a second, driving substep; - a third, stopping substep; a fourth substep of deactivating the position-keeping device 40′ by the activation and deactivation device 70′, a fifth substep of activating the position-keeping device 40' by the activation and deactivation device 70'.

[0080] Preferably, whatever the embodiment, the drive cam 13; 13' and the drive lever 30; 30' are arranged to drive the time or time-derived information display mobile unit 50; 50' instantaneously.

[0081] Preferably, whatever the embodiment, the coupling device comprises a link that fixes the drive cam 13; 13' to the deactivation cam 22; 22' according to at least one degree of freedom.

[0082] According to a first embodiment, the coupling device advantageously comprises gears 12 , 21 connecting the drive cam 13 and the deactivation cam 22 .

[0083] According to the second embodiment, the coupling device advantageously comprises a stud or pin 18' connecting the drive cam 13' and the deactivation cam 22', so that there is an embedded connection or rigid joint between the drive cam 13' and the deactivation cam 22'.

[0084] Preferably, whatever the embodiment, the system, and in particular the drive lever 30; 30', includes a drive lever return spring 30a; 30a'.

[0085] Preferably, whatever the embodiment, the device 40; 40' for maintaining the position of the mobile unit comprises: - Jumper body 40b; 40b' and - Jumper spring 40a; 40a' and Includes jumper 40;40', The activation and deactivation devices 70, 70' include an actuating element on the jumper body 40b, 40b' or the jumper spring 40a, 40a'. In the described embodiment, the action is exerted on the jumper spring 40a, 40a'. The actuating element may be the runner 41, 41'. More generally, the actuating element may be any element or configuration of the spring 40a, 40a' that contacts the jumper cam 22, 22'. Alternatively, the actuating element may be an intermediate means arranged between the jumper cam 22, 22' and the jumper 40, 40'.

[0086] The position of the jumper 40;40' may be varied, among other things, if the activation and deactivation device 70;70' acts on or controls the body of the jumper 40b;40b' rather than the spring 40a;40a'. Furthermore, the jumper 40;40' may essentially be a rigid lever, without a return spring, that latches and unlatches the mobile unit 50;50' as a function of the position of the deactivation cam 22;22'.

[0087] As mentioned above, the jumper cams 22, 22' and the instantaneous jump cams 13, 13' may be directly fixed to each other (especially by means of a rigid joint or a recessed connection), as in the second embodiment, or may be kinematically connected by an intermediate gear train, as in the first embodiment. Other connecting means may also be provided, such as a chain of intermediate gears or a drive pawl.

[0088] Regardless of the embodiment, the jumper cam 22; 22' can simultaneously control, for example, the jumpers of several mobile units or displays. Specifically, the jumper cam may include several distinct heights for controlling such multiple jumpers. Additionally or alternatively, the jumper cam 22; 22' may be kinematically coupled to other jumper cams.

[0089] In the above-described embodiment, the one-way connecting device 14 and the elliptical notch 11a' cooperating with the stud 18' are arranged to decouple the base movement and the instantaneous jump cam during the instantaneous jump step in which the instantaneous jump cam is the driving cam. Any other decoupling device can be arranged here, such as, for example, the absence of a portion of the toothing of the driving gear or other freewheel system, which can give the system the degree of freedom required for the instantaneous jump of the mobile unit.

[0090] In the above-described embodiment, a runner 41; 41' is arranged at the end of the spring 40a; 40a' of the jumper 40; 40'. The runner makes it possible to limit friction on the jumper cam 22; 22'. However, this arrangement is not essential. The system can work well without a runner, by directly associating one of the ends of the spring 40a; 40a' with the jumper cam 22; 22'.

[0091] Like the jumpers 40; 40', the drive levers 30; 30' may not have runners 31; 31' at their ends.

[0092] The drive member 23; 23' can also be simplified by essentially having a single rigid or resilient pawl for achieving leading and stopping of the mobile unit 50; 50'.

[0093] The drive and position-keeping system 90; 90' can also be used for any other calendar system and / or any other system requiring instantaneous transition of a function or display, including indexing and / or maintaining the function or display. For example, the drive and position-keeping system can be strategically arranged to drive a mobile unit that displays the current hour.

[0094] The described drive and position-keeping system 90; 90' may also be replaced by a display system including other date display elements, for example a hand display. Furthermore, the date display system may include several date display elements, as is the case for example in a "large date" type system.

[0095] An embodiment of a method for operating said drive and position-keeping system 90;90' and / or said timepiece calendar system 100;100' and / or said movement 110;110' and / or said timepiece 120;120' is described below.

[0096] The operating method includes a step of instantaneous jump of the drive unit 80; 80', which includes the following sub-steps: - a first substep of approaching the drive 80;80', a fourth substep of deactivating the position-keeping device 40; 40' by the activation and deactivation device 70; 70', simultaneously with the first substep of approaching the drive device 80; 80'; - a second substep of actuating the drive device 80; 80'; - a third substep of stopping the drive 80;80'; a fifth substep of activation of the position-keeping device 40;40' by the activation and deactivation device 70;70', simultaneously with a third substep of stopping the drive device 80;80'.

[0097] More specifically, the instantaneous jump step of the drive unit 80; 80' includes the following substeps: - a first substep of approaching the drive 80;80', a fourth substep of deactivating the position-keeping device 40; 40' by the activation and deactivation device 70; 70', simultaneously with the first substep of approaching the drive device 80; 80'; a second sub-step of actuation of the drive device 80; 80', the deactivated state of the position-keeping device 40; 40' being maintained during the second sub-step of actuation of the drive device 80; 80', - a third substep of stopping the drive 80;80'; - A fifth sub-step of activation of the position-keeping device 40;40' by the activation and deactivation device 70;70', simultaneously with the third sub-step, in which the activated state of the position-keeping device 40;40' is maintained until the first sub-step of the approach of the next drive device 80;80' (of the next instantaneous jump step).

[0098] In other words, the method allows the mobile unit 50;50' to be driven even if the position-keeping device 40;40' is deactivated. Furthermore, the method allows the position-keeping device 40;40' to be reactivated during the instantaneous jump step of the mobile unit 50;50'.

[0099] FIG. 28 makes it possible to illustrate a preferred embodiment of the method of operation of the system 90; 90'. More specifically, FIG. 28 illustrates a timing diagram including an X-axis indicating time t and a Y-axis indicating the respective states of the position-keeping devices 40; 40' and the drives of the mobile units 50; 50'. In particular, the coordinates 0 and 1 correspond to the inactive and active states of the position-keeping devices 40; 40', respectively, and to the stop and drive of the mobile units 50; 50', respectively. The time intervals over which the method extends are indicated by ti, located between the abscissas t1 to t6, which correspond to the start and end of the instantaneous jump steps of the drives 80; 80', respectively.

[0100] These different states are connected as follows: t1: the start of a first approach sub-step, during which the position-keeping device 40; 40' is in the activated state and the mobile unit 50; 50' is stationary, followed by t2: Beginning of the fourth substep of deactivating the position-keeping device 40; 40', then t3: the start of a second sub-step of driving the mobile unit 50; 50' while the position-keeping device 40; 40' is in the deactivated state, and then t4: the start of a third sub-step of stopping and a fifth sub-step of activating the position-keeping device 40; 40' after the drive device 80; 80', more particularly the beak 42; 42' of the jumper, has passed the apex of the tooth row 50a; 50a', after which t5: the mobile unit 50; 50' comes to a stop while the position-keeping device 40; 40' is in the activated state, and then - t6: At the end of the instantaneous jump step, the position-keeping device 40; 40' remains activated.

[0101] Alternatively, FIG. 29, similar to FIG. 28, illustrates different states of the position-keeping device 40; 40' during two second drive substeps of the drive devices 80; 80' of the display mobile unit 50; 50', which follow each other. This particular case illustrates a date transition, for example, between the 30th and the 1st of the following month at the end of a minor month in an annual, semi-perpetual, or perpetual calendar system. The figure also illustrates the fact that the position-keeping device 40; 40' is advantageously deactivated and activated only once over a time interval corresponding to two instantaneous jumps, in particular two second drive substeps. By extension, it is possible to increase the drive substeps, for example, to allow three or four consecutive date jumps, in particular in a date transition from the 28th day of a semi-perpetual or perpetual calendar to the 1st of the following month. In this case, the position-keeping device 40; 40' is advantageously deactivated and activated only once over a time interval corresponding to multiple instantaneous jumps. Such an actuation method is particularly advantageous in the context of a quasi-perpetual or perpetual calendar. The plurality of second driving sub-steps can be considered as a single driving sub-step over several pitches of the time or time-derived information display mobile unit 50; 50'.

[0102] By way of example, Figures 30 and 31 illustrate a variant of the timepiece calendar system 100. In this particular variant, the calendar system is an annual calendar system, the operating principle of which is known from Patent Document 6. More specifically, in this variant, the display mobile unit 50 supports a planet mobile 51 which meshes with a sun gear 60. The planet mobile 51 is provided with a planet pinion 51a with four teeth corresponding to the four months of the year, each having 30 days, which meshes with the fixed toothing of the sun gear 60. The gear ratio between the planet mobile 51 and the sun gear 60 is selected so that at the end of every 30-day month, one of the teeth of the planet pinion 51a is located in the path of an additional pawl 24a, which is fixed to the jumper cam 22 and the instantaneous jump cam 13, here via the coupling devices 12 and 21.

[0103] The additional claw 24a is angularly offset relative to the first member 24 of the drive member 23. Due to the angular offset between the first member 24 and the additional claw 24a, during the instantaneous jump step, it is the additional claw 24a that first encounters one of the teeth of the planet pinion 51a, displacing the display mobile 50 by one pitch and transitioning from the 30th to the 31st day. Then, during the same instantaneous jump step, the first member 24 takes over and drives the teeth of the tooth row 50a of the display mobile unit 50 by a second pitch, transitioning from the 31st to the 1st day. Thus, during the same instantaneous jump step, the display mobile unit 50 transitions from the 30th to the 1st day, i.e., undergoes two second drive sub-steps.

[0104] As in the mechanism described in Patent Document 6, the first member 24 and the additional claw 24a are both fixed to the instantaneous jump cam 13 via coupling devices 12, 21. Although here arranged on the same drive mobile unit 20, the first member 24 and the additional claw 24a can also be arranged on two separate drive mobile units. More broadly, the same number of drive mobile units as there are drive members of the display mobile unit 50 can be fixed to the instantaneous jump cam 13.

[0105] 28 and 29 show the transitions between different states in unit steps. Obviously, this transition can exhibit, for example, a slope and does not have to change states abruptly.

[0106] More preferably, activation of the position-holding device 40; 40', more particularly switching of the position-holding device 40; 40' to the activated state, is performed after the balance point of the position-holding device has been passed, particularly after the apex of the tooth of the indexing tooth row 50a; 50a' has been passed by the jumper beak 42; 42'.

[0107] Alternatively, the position-keeping device 40; 40' may be kept in a deactivated state at least during the driving of the mobile unit 50; 50', or The position-keeping device 40; 40' may be switched to a deactivated state after the start of the drive of the mobile unit 50; 50'.

[0108] The solution described makes it possible to control the loading of the jumper that indexes the mobile unit. This is made possible by the arrangement of a jumper cam kinematically coupled to the instantaneous jump cam. The instantaneous jump cam, together with its elastic lever, allows the energy required for the jump to be stored. The jumper cam is configured to release the jumper only during some substeps that constitute an instantaneous jump step of the mobile unit or during several instantaneous jumps of the mobile unit, after the stored energy is restored by the elastic lever cooperating with the instantaneous jump cam. Before or after the instantaneous jump step, the jumper is operated in a conventional manner, with an optimal loading to position and maintain the mobile unit. In this way, the arrangement of such a system does not affect the user, for example, in the case of a quick date adjustment.

[0109] Furthermore, due to its configuration, the instantaneous jump cam advantageously allows for an energy consumption that is constant and distributed throughout the loading step, or at least throughout the majority of the loading step. The advantage of obtaining a reduction in energy consumption due to the implementation of the jump cam is thus combined with the advantage of optimally distributing the energy consumption during the loading step. The result is an optimized energy consumption that allows for a reduction in the amplitude fluctuations of the governor element and thus a reduction in the adverse effects on chronometry.

[0110] Additionally, a one-way connection device is positioned upstream of the cam, which advantageously prevents the user from placing the system in a configuration where the jumper is open, so that it is not possible to place the system in a configuration where the jumper is open other than during the instantaneous jump or jumps corresponding to a date transition.

[0111] As used herein, "indexing of the mobile unit" is understood to mean the definition of various stable positions of the mobile unit. These stable positions are defined by a device that maintains the position of the mobile unit. These stable positions are separated by a series of unstable intermediate positions. A drive device enables the mobile unit to switch from one stable position through a series of unstable intermediate positions to another stable position. Between two stable positions or two indexed positions or two indexed positions, the mobile unit transitions transiently through a series of unstable intermediate positions.

[0112] The position-keeping device activation and deactivation device allows for activation or deactivation of the mobile unit holding device. Preferably, herein (except for some substeps of the mobile unit's instantaneous jump or multiple jumps) the position-keeping device is considered to be activated or active, i.e., generating a nominal torque to index or hold the mobile unit's position. The activation and deactivation device then activates the position-keeping device. Preferably, herein (except for some substeps of the mobile unit's instantaneous jump or multiple jumps) the holding device is considered to be deactivated or inactive, i.e., not generating a torque to index or hold the mobile unit's position, or preferably, generating a reduced torque to index or hold the mobile unit's position. The reduced torque is less than the nominal torque.

[0113] Preferably, in this specification "synchronizing the drive cam and the deactivation cam" is understood to mean that during each operation (drive phase) of the drive device, the position-keeping devices are configured in the deactivation state, in particular if several position-keeping devices are provided, all of them are configured in the deactivation state. As a result of the disclosed embodiment, the link fixing the drive cam 13; 13' to the deactivation cam 22; 22' based on at least one degree of freedom is permanent.

[0114] Preferably, in this specification "instantaneous" is understood to mean a duration of a fraction of a second or greater.

[0115] With regard to the method of operation of the above-mentioned drive and position-keeping system 90; 90' and / or the above-mentioned clock calendar system 100; 100' and / or the above-mentioned movement 110; 110' and / or the above-mentioned clock 120; 120', "simultaneous" is preferably used to qualify substeps that do not necessarily start and / or end at the same instant, but that at least partially overlap in time.

[0116] In other words, the method of operation preferably comprises: - deactivating the position-keeping device 40; 40'; - a sub-step of driving the mobile unit 50;50'; wherein the deactivating and actuating substeps are performed simultaneously.

[0117] For example, the method of operation may include the following sequence of sub-steps: - Switching the position-keeping device (40; 40') to the deactivated state, then - Driving the mobile unit (50;50'), then - Switching the position-keeping device (40; 40') to the activated state. [Explanation of symbols]

[0118] 11 Drive gear 12 gears 13 Drive cam 21 Gear 22 Deactivate Cam 23 Driving member 30 Drive lever 30a Drive lever return spring 40 Position holding device 40a jumper spring 40b Jumper body 50 Mobile Units 70 Activation and deactivation devices 80 Drive unit 90 Drive and positioning system 100 Clock and Calendar System 110 Clock Movement 120 Clock

Claims

1. A system (90; 90') for driving and maintaining the position of a mobile unit (50; 50') displaying time or time-derived information, comprising: a drive device (80; 80') for driving the mobile unit (50; 50'), the drive device including a drive cam (13; 13') and a drive lever (30; 30') for driving the drive member (23; 23'); a position-keeping device (40; 40') for maintaining the position of the mobile unit (50; 50'); a device (70; 70') for activating and deactivating said position-keeping device (40; 40') including a deactivation cam (22; 22'); a device (12, 21; 18') for mechanically coupling or synchronizing said drive cam (13; 13') with said deactivation cam (22; 22'); Including, the system.

2. the drive cam (13; 13') and the drive lever (30; 30') are arranged to momentarily drive the mobile unit (50; 50') displaying time or time-derived information; The system of claim 1 .

3. The coupling or synchronizing device includes gears (12, 21) connecting the driving cam (13) and the deactivating cam (22).

3. The system according to claim 1 or 2.

4. said coupling or synchronising device comprising a link fixing said driving cam (13') to said deactivating cam (22') according to at least one degree of freedom; 3. The system according to claim 1 or 2.

5. The system includes a drive lever return spring (30a; 30a'), A system according to any one of claims 1 to 4.

6. The drive device (80) includes a drive gear (11) and one-way connecting devices (14, 15, 16, 17, 18) connecting the drive gear (11) and the drive cam (13).

6. A system according to any one of claims 1 to 5.

7. The drive device (80') comprises a drive gear (11') and a mechanical connection (11a', 18') connecting the drive gear (11') and the drive cam (13'), the mechanical connection having an angular play of rotation about the rotation axis (A2') of the drive gear (11') and / or the drive cam (13'). A system according to any one of claims 1 to 6.

8. The device (40; 40') for maintaining the position of the mobile unit comprises: A jumper body (40b; 40b'), A jumper spring (40a; 40a'), a jumper (40; 40') including the activation and deactivation device (70; 70') comprises an operating element for the jumper body (40b; 40b'); and / or the device (40; 40') for maintaining the position of the mobile unit, A jumper body (40b; 40b'), A jumper spring (40a; 40a'), a jumper (40; 40') including the activation and deactivation device (70; 70') comprises an operating element for the jumper spring (40a; 40a'); A system according to any one of claims 1 to 7.

9. a mobile unit (50; 50') for displaying time or time-derived information; A drive and position-keeping system (90; 90') according to any one of claims 1 to 8, A clock calendar system (100; 100') including:

10. A timepiece movement (110; 110') comprising a drive and position-keeping system (90; 90') according to any one of claims 1 to 8 or a timepiece calendar system (100; 100') according to claim 9.

11. A timepiece (120; 120') comprising a drive and position-keeping system (90; 90') according to any one of claims 1 to 8 or a timepiece calendar system (100; 100') according to claim 9 or a movement (110; 110') according to claim 10.

12. A method for operating a drive and position-keeping system (90; 90') according to any one of claims 1 to 8 or a timepiece calendar system (100; 100') according to claim 9 or a movement according to claim 10 or a timepiece according to claim 11, comprising: The method comprises: a first substep of approaching said drive device (80; 80'); a fourth sub-step of deactivating the position-keeping device (40; 40') by the activation and deactivation device (70; 70') simultaneously with the first sub-step of approaching the drive device (80; 80'); a second substep of driving the drive device (80; 80'); a third substep of stopping the drive (80; 80'); a fifth substep of activating the position-keeping device (40; 40') by the activation and deactivation device (70; 70'), simultaneously with a third substep of stopping the drive device (80; 80'); a step of instantaneous jump of said drive device (80; 80') comprising the sub-steps

13. the deactivated state of the position-keeping device (40; 40') is maintained during the second sub-step of actuation of the actuation device (80; 80'); and the activation state of the position-keeping device (40; 40') is maintained until the first sub-step of the next approach of the drive device (80; 80'), 13. The method of claim 12.

14. the second sub-step of driving the driving device (80; 80') is a sub-step of driving the mobile unit (50; 50') for displaying time or time-derived information by at least two pitches; 14. A method of operating according to claim 12 or 13.

15. the sub-steps are performed when the drive lever (30; 30') drives the drive cam (13; 13'), and / or the sub-steps are performed instantaneously; 15. A method according to any one of claims 12 to 14.

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