Display device for time or time-derived readings and indexing device

Abstract

A display device for time or time-derived readings comprises a first display movable unit comprising a first ring gear, a second ring gear and a first dial with figures for displaying units of time or time-derived readings, a second display movable unit comprising a third ring gear, a fourth ring gear and a second dial with figures for displaying tens of time or time-derived readings, and a mechanism for driving the first and second movable units, the mechanism comprising a first control movable unit comprising a fifth ring gear adapted to cooperate by means of obstacles, in particular by engaging, with the first ring gear and the third ring gear, and a second control movable unit comprising a sixth ring gear adapted to cooperate by means of obstacles, in particular by engaging, with the second ring gear and the fourth ring gear.

Description

Technical Field

[0001] The present invention relates to a display device for the time or a reading derived from the time. The present invention also relates to a jumper or indexing device. The present invention further relates to a timepiece movement comprising such a display device and / or such a jumper or indexing device. The present invention further relates to a timepiece comprising such a display device and / or such a jumper or indexing device or such a timepiece movement. Finally, the present invention relates to a method for operating such a display device, such a timepiece movement, or such a timepiece. Background Art

[0002] Prior art "grande date" mechanisms systematically employ a control wheel or disc having 31 teeth, or a control wheel or disc that completes one rotation in 31 steps, which is bulky and therefore precludes convenient integration of such a mechanism into a watch movement. Furthermore, the sequence of the control devices for actuating the tens and units discs is often complex and offers limited freedom of choice regarding the position of the movable element in the plane.

[0003] All the solutions identified have used a control movable unit or disc with 31 teeth. For example, documents CH310559 and WO9850829 disclose two main drive solutions for what are now known as “big date” mechanisms.

[0004] Document CH310559 describes the layout of a first control movable unit that drives a first display movable unit for the units digit and a second display movable unit for the tens digit. These two display movable units are arranged side by side. The control movable unit advances one step every 24 hours and completes one rotation in 31 steps. The control movable unit comprises three toothed rings arranged at three different levels. The first toothed ring is configured to drive itself, the second toothed ring includes 30 teeth configured to drive the units display movable unit, and the third toothed ring includes 4 teeth configured to drive the tens display movable unit. The arrangement on three different levels and the use of a control movable unit that jumps in 31 steps makes this solution particularly cumbersome and difficult to incorporate into a watch movement.

[0005] The second document, WO9850829, describes the use of a control disk that advances one step every 24 hours and drives a first movable display unit for the units digit and a second movable display unit for the tens digit. These two movable display units are arranged side by side. The control disk includes two toothed rings arranged at two different levels. The first toothed ring includes 31 teeth, 30 of which effectively drive the movable display unit for the units digit. The second toothed ring includes 31 teeth, 4 of which effectively drive the movable display unit for the tens digit. The overall size of this disk in a flat surface is very large. Similar to the date disk, there is virtually no freedom of choice in the arrangement of the two movable display units in the watch movement. Furthermore, the use of a disk that jumps sequentially in 31 steps makes this solution particularly difficult to incorporate into a watch movement.

[0006] As mentioned above, a "big date" mechanism typically includes two display movables for displaying the date, the first of which displays the units digit and the second displays the tens digit. Each of these two display movables requires an angular position indexing device that allows for the indexing of the units and tens digits, respectively, within the aperture. "Indexing" the movable preferably means maintaining it in a specific angular position from a limited number of possible angular positions, these positions being separated from one another by an angle, in particular by a fixed angle.

[0007] A problem with this "big date" mechanism is that the energy consumption of the movement when changing the date depends particularly on the date being changed. Indeed, depending on the sequence of mechanisms used to display the date, more than one "big date" movable element needs to be actuated. With conventional movable element indexing devices, the movement must overcome one or both detents or levers, each forming an indexing mechanism. This results in energy consumption that varies significantly depending on the date being changed. When the movement must overcome two detents or levers, less energy is available to the regulating element, resulting in potential amplitude losses at the same regulating element level. To achieve optimal chronometric performance, these amplitude variations must be as small as possible.

[0008] Several prior art documents identified describe mobile indexing devices using two levers that are incompatible with a "big date" mechanism and / or do not propose any solution with equivalent or substantially equivalent energy consumption in the presence of one or more indexing levers to be actuated.

[0009] Document CH986270 describes a calendar with a date indicator and a day indicator. The movable element indexing device comprises a lever with two beaks fastened together to position the two indicators, an elastic return element, and an eccentric fixedly attached to the lever. The eccentric adjusts the relative position of the two beaks and, therefore, the angular indexing position of the two indicators. This solution cannot be used to index a "big date" mechanism, as this requires a degree of freedom between the two beaks that can operate independently of each other.

[0010] US Pat. No. 4,048,795 describes a calendar that includes a movable indexing device for positioning the date and day indicators. The device comprises a single lever with two beaks and two elastic return elements. To provide the indexing device with an additional degree of freedom, the lever also includes a slot adapted to mate with a pin fixedly attached to the movement frame, thereby forming a sliding connection. Although the beak is fixedly attached to only one lever, this additional degree of freedom allows the indicators to operate independently. In fact, due to this sliding connection, when only one of the two indicators is activated (for example, during a first operation for adjusting the calendar), the beak mates with the other indicator, which is retained in the latter's teeth, and serves as the lever's pivot. In this case, only one of the two elastic return elements is loaded. The situation is similar when the other indicator is activated (for example, during a second operation for adjusting the calendar). On the other hand, when both indicators are activated simultaneously during normal calendar operation, the lever pivots about the pin, and both elastic return elements of the lever are loaded. This indexing device does not provide a solution for driving the same return element when both indicators are activated simultaneously. Furthermore, it is not possible to achieve equivalent or substantially equivalent energy consumption regardless of the number of activated display elements.

[0011] Document FR2120056 describes a calendar comprising a movable element indexing device with a lever having two independently actuated beaks. This movable element indexing device is described as comprising at least one beak for indexing the date indicator or the day indicator, and an elastic member oriented in two directions to allow the device to elastically return. With this device, the loading of the elastic member of the movable element indexing device, and therefore the energy consumption, depends on the number of actuated beaks. Therefore, this solution is not optimal. Summary of the Invention

[0012] According to a first aspect, the object of the present invention is to provide a device for displaying the time or a reading derived from the time that remedies the aforementioned drawbacks and improves the known prior art devices. In particular, the present invention proposes a device for displaying the time or a reading derived from the time that offers great flexibility or flexibility in the layout of the display mechanism and makes it possible to obtain a structure having very small overall dimensions in plan and providing very stable operation.

[0013] According to a second aspect, the object of the present invention is to provide a pawl or position indexing device that is able to remedy the above-mentioned drawbacks and improve the known prior art devices. In particular, the present invention proposes a pawl or position indexing device that has a simple structure, is able to use two levers that can be operated independently of each other, and is also able to obtain an equal or substantially equal restoring force on the elastic return element regardless of the number of levers or beaks to be actuated.

[0014] According to a first aspect of the present invention, a display device is defined by the following subject matter.

[0015] 1. A display device 100 for time or a reading derived from time, comprising:

[0016] a first display mobile unit 10 comprising a first toothed ring 11 b , a second toothed ring 11 c and a first disc 12 with numerals 13 for displaying the units digit of the time or a reading derived from the time;

[0017] a second display movable unit 20 comprising a third ring gear 21 b , a fourth ring gear 21 c and a second disc 22 with numerals 23 representing the tens digit of the time or a reading derived from the time; and

[0018] A mechanism 90 for driving the first and second movable units, the mechanism comprising:

[0019] a first control movable unit 30 comprising a fifth gear ring 30a adapted to pass through obstacles, in particular to cooperate with the first gear ring and the third gear ring by meshing; and

[0020] The second control movable unit 40 includes a sixth gear ring 40a adapted to pass through obstacles, in particular, to cooperate with the second gear ring and the fourth gear ring through meshing.

[0021] 2. The display device according to item 1, characterized in that the first, third and fifth ring gears have substantially the same first basic diameter and / or the second, fourth and sixth ring gears have substantially the same second basic diameter.

[0022] 3. The display device according to subject matter 2, characterized in that the first and second base diameters are equal or substantially equal.

[0023] 4. The display device according to any one of the subjects 1 to 3, characterized in that the first control movable unit 30 and the second control movable unit 40 are coaxially arranged on the axis A3.

[0024] 5. The display device according to any one of the topics 1 to 4, characterized in that the driving mechanism 90 comprises a driving wheel 60 having a seventh ring gear 61 suitable for directly or indirectly driving the first control movable unit.

[0025] 6. The display device according to any one of subjects 1 to 5, characterized in that the second control movable unit is adapted to be driven by the first display movable unit and / or the second display movable unit.

[0026] 7. A display device according to any one of topics 1 to 6, characterized in that the drive mechanism 90 includes an intermediate movable unit 50 that cooperates with the seventh ring gear of the drive wheel 60 and the fifth ring gear of the first control movable unit 30 through an obstacle, in particular through meshing, and / or the drive mechanism 90 includes a calibration movable unit 70 suitable for directly or indirectly driving the fifth ring gear of the first movable unit 30.

[0027] 8. The display device according to any one of the subjects 1 to 7, characterized in that the driving mechanism 90 is of an instantaneous jump type, a semi-instantaneous jump type, or a drag type.

[0028] 9. The display device according to any one of subjects 1 to 8, characterized in that the first ring gear 11b includes 9 teeth, the second ring gear 11c includes 2 teeth, the third ring gear 21b includes 4 teeth, and the fourth ring gear 21c includes 6 teeth.

[0029] 10. The display device according to any one of subjects 1 to 8, characterized in that the first ring gear 11b includes 9 teeth, the second ring gear 11c includes 2 teeth, the third ring gear 21b includes 7 teeth, and the fourth ring gear 21c includes 8 teeth.

[0030] 11. A display device according to any of topics 1-10, characterized in that the first disc comprises a series of numbers "0, 1, 2, 3, 4, 5, 6, 7, 8, 9" and / or the second disc comprises a series of numbers "0, 0, 1, 1, 1, 2, 2, 2, 3, 3".

[0031] 12. Display device according to any of the topics 1 to 11, characterized in that the display device for the time or a reading derived from the time is a date display device, in particular of the "big date" type, the first disc being a units disc and the second disc being a tens disc.

[0032] According to a first aspect of the invention, a timepiece movement is defined by the following subject matter.

[0033] 13. A timepiece movement 110 comprising a device 100 according to any one of the topics 1 to 12.

[0034] According to a first aspect of the present invention, a timepiece is defined by the following subject matter.

[0035] 14. A timepiece 120, in particular a watch, more particularly a wristwatch, comprising a device 100 according to any one of the topics 1 to 12 and / or a timepiece movement 110 according to topic 13.

[0036] According to a first aspect of the present invention, a method for operating a display device is defined by the following subject matter.

[0037] 15. A method for operating a device 100 according to any of the topics 1 to 12, a timepiece movement 110 according to the topic 13, or a timepiece 120 according to the topic 14, characterized in that it comprises:

[0038] The first control movable unit 30 drives the first display movable unit 10; and / or

[0039] Simultaneously including the steps of the first control movable unit 30 driving the first display movable unit 10 and the first display movable unit 10 driving the second display movable unit 20 via the second control movable unit 40; and / or

[0040] The first control movable unit 30 drives the second display movable unit 20; and / or

[0041] The method simultaneously includes a step in which the first control movable unit 30 drives the second display movable unit 20 and a step in which the second display movable unit 20 drives the first display movable unit 10 via the second control movable unit 40 .

[0042] According to a second aspect of the present invention, a pawl device is defined by the following subject matter.

[0043] 16. A pawl device 80 for a timepiece device 100, comprising:

[0044] at least one first arm 81 comprising a first beak 81 a for positioning the first movable unit 10;

[0045] at least one second arm 82 comprising a second beak 82a for positioning the second movable unit 20;

[0046] an elastic member 84 for returning the first and second arms to a configuration for positioning the first and second movable units; and

[0047] A lever 83 , 83 ′ is inserted between the elastic return element on the one hand and the first and second arms on the other hand.

[0048] 17. The device according to subject matter 16, characterized in that the device is a device for indexing the angular positions of the rotationally movable first movable unit 10 and the rotationally movable second movable unit 20.

[0049] 18. Device according to subject matter 16 or 17, characterized in that the device comprises a frame 99, wherein the first arm is mounted to pivot relative to the frame 99 and wherein the second arm is mounted to pivot relative to the frame 99, the first and second arms being in particular mounted to pivot about the same axis A5.

[0050] 19. Device according to any of the subjects 16-18, characterized in that it comprises a frame 99 and in that the levers 83, 83' are mounted to move relative to the frame and have:

[0051] One translational degree of freedom; and

[0052] One rotational degree of freedom.

[0053] 20. Device according to any of the subjects 16-19, characterized in that the maximum dimension of the lever is at least two or three times smaller than the maximum dimension of the first arm or the maximum dimension of the second arm.

[0054] 21. The device according to any of the subjects 16-20, characterized in that the device comprises a frame 99 and wherein the device comprises:

[0055] a slot 85 on the lever or on the frame; and

[0056] A pin 86 disposed on or fixed to the frame or lever,

[0057] The slot and the pin cooperate with each other to form a mechanical connection having translational and rotational freedom.

[0058] 22. Device according to any of the subjects 16 to 21, characterized in that the elastic return element 84 comprises a leaf spring.

[0059] 23. Device according to any of the subject matters 16 to 22, characterized in that the lever 83' or the elastic return element has a cam surface 89 suitable for loading the elastic return element 84 when the lever is pivoted in rotation.

[0060] According to a second aspect of the present invention, a display device is defined by the following subject matter.

[0061] 24. A date display device 100, in particular a "big date" display device, comprising a detent device according to any one of the subjects 16 to 23.

[0062] 25. The date display device 100 according to subject matter 24, comprising a first movable unit 10 for displaying units digits and a second movable unit 20 for displaying tens digits.

[0063] According to a second aspect of the invention, a timepiece movement is defined by the following subject matter.

[0064] 26. A timepiece movement 110 comprising a device according to any one of the subjects 16 to 25.

[0065] According to a second aspect of the present invention, a timepiece is defined by the following subject matter.

[0066] 27. A timepiece 120, in particular a watch, especially a wristwatch, comprising a device according to any one of the subjects 16 to 25 and / or a timepiece movement 110 according to the subject 26.

[0067] According to a second aspect of the invention, a method for operating a device is defined by the following subject matter.

[0068] 28. A method for operating a device 80, 100 according to any of the themes 16 to 25, a timepiece movement 110 according to the theme 26, or a timepiece 120 according to the theme 27, characterized in that it comprises:

[0069] a step of moving the first arm and / or the second arm by the action of movement of the first movable unit 10 and / or the second movable unit 20 and a step of loading the elastic return element 84 by the action of movement of the levers 83, 83'; and

[0070] The step of restoring the elastic return element 84 to drive the first movable unit 10 and / or the second movable unit 20 to rotate by means of the levers 83 , 83 ′ and the first arm and / or the second arm.

[0071] 29. The method according to subject matter 28, characterized in that the step of loading has the same intensity in at least two of the following cases:

[0072] Loading is performed by movement of the first movable unit;

[0073] Loading is performed by movement of the second movable unit;

[0074] The loading is performed by the movement of the first and second movable units.

[0075] Except for technically or logically incompatible cases, all combinations of the features of the first and second aspects can be implemented. BRIEF DESCRIPTION OF THE DRAWINGS

[0076] The accompanying drawings show, by way of example, two embodiments of a timepiece.

[0077] Figure 1 A first embodiment of the timepiece is shown.

[0078] Figure 2 It is a detailed view of a first embodiment of a display device for the time or a reading derived from the time.

[0079] Figure 3 is a cross-sectional view of a first embodiment of a display device for time or readings derived from time (in Figure 2 on plane II in the figure).

[0080] Figure 4 is a cross-sectional view of a first embodiment of a display device for time or readings derived from time (in Figure 2 on plane II-II in the figure).

[0081] Figure 5 A cross-sectional view showing a first variant of a first embodiment of a display device for time or readings derived from time (in FIG. Figure 3 and 4 Two sectional views on planes III-III and IV-IV in FIG.

[0082] Figure 6 A cross-sectional view showing a second variant of the first embodiment of the display device for time or readings derived from time (in FIG. Figure 3 and 4 Two sectional views on planes III-III and IV-IV in FIG.

[0083] Figure 7 A diagram showing the operation of the first variation of the first embodiment of the display device.

[0084] Figure 8 A diagram showing the operation of the second variation of the first embodiment of the display device.

[0085] Figure 9 A second embodiment of the timepiece is shown.

[0086] Figure 10 A detailed view showing a first embodiment of the indexing device.

[0087] Figures 11-13 Explanatory views showing the operation of the first embodiment of the indexing device.

[0088] Figures 14-16 Explanatory views showing the operation of the second embodiment of the indexing device. DETAILED DESCRIPTION

[0089] References below Figures 1-8 A first embodiment of the timepiece 120 will be described.

[0090] The timepiece 120 is for example a watch, in particular a wristwatch.

[0091] The timepiece 120 comprises a timepiece movement 110. This timepiece movement is intended to be mounted in a timepiece case, so as to be protected from the outside environment.

[0092] The timepiece movement 110 can be an electronic movement or a mechanical movement, in particular an automatic movement.

[0093] The timepiece movement comprises a display device 100 for a time or time-derived reading. The time or time-derived reading is preferably a reading of the date. However, this reading can also be any other type, in particular a numerical reading of more than two digits, for example a reading of the year or a reading of the month or a reading of the day of the week or a reading of the hours or a reading of the minutes or a reading of the seconds.

[0094] In this first embodiment, the display device is for example a "big date" type device for displaying the date.

[0095] The display device 100 for a time or time-derived reading comprises:

[0096] a first display mobile unit 10 comprising a first ring 11b, a second ring 11c and a first dial 12 bearing digits 13 for displaying the units of the time or time-derived reading;

[0097] a second display mobile unit 20 comprising a third ring 21b, a fourth ring 21c and a second dial 22 bearing digits 23 for displaying the tens of the time or time-derived reading; and

[0098] a mechanism 90 for driving the first and second mobile units.

[0099] The driving mechanism 90 comprises:

[0100] a first control mobile unit 30 comprising a fifth ring 30a adapted to cooperate by obstacle, in particular by engagement, with the first and third rings; and

[0101] a second control mobile unit 40 comprising a sixth ring 40a adapted to cooperate by obstacle, in particular by engagement, with the second and fourth rings.

[0102] The first movable display unit 10 pivots about a first axis A1. The second movable display unit 20 pivots about a second axis A2. The first and second axes are preferably parallel or substantially parallel. The first and second movable units are preferably arranged side by side, so that the units digit of the first movable unit and the tens digit of the second movable unit are positioned adjacent to each other, thereby displaying a numerical value or information, such as the date of the month. The device may include an indicator, such as a window provided in the dial or a plate having a color that contrasts with the numerals 13 and 23 or the discs 12 and 22, to form a reading area for the information to be indicated or defined.

[0103] The display device 100 further comprises an indexing system 80 for the angular position of the first and second display movable units. The system comprises arms 81 and 82, respectively, adapted to angularly index the first and second display movable units as described below.

[0104] The first display movable unit 10 includes a first gear 11, specifically a first gear ring 11b and a second gear ring 11c. The first gear ring, for example, has nine teeth. For example, the first gear ring is composed of ten teeth equally spaced about the axis A1, with one tooth removed or missing. In other words, it is a combination of ten teeth with one tooth missing. The second gear ring 11c, for example, has two teeth. For example, the second gear ring is composed of ten teeth equally spaced about the axis A1, with eight teeth removed or missing. In other words, it is a combination of ten teeth with eight teeth missing. The two teeth of the second gear ring are preferably juxtaposed, meaning there is no gap between them to accommodate the missing teeth. These tooth-missing gear rings are configured to allow the first movable unit and the second movable unit to be driven in a specific sequence, as described below. The first and second gear rings can be considered to constitute a single gear ring with no missing teeth, with one tooth located on the first gear ring at the angular position where the second gear ring lacks a tooth, and one tooth located on the second gear ring at the angular position where the first gear ring lacks a tooth. Furthermore, at least one tooth of the first ring gear can also be juxtaposed to a tooth of the second ring gear.

[0105] The first disk 12 includes 10 units digits 0 to 9. These digits are displayed on the units digit display disk 12.

[0106] like Figure 3 As shown, the first and second ring gears 11b and 11c are juxtaposed at two different levels, located in planes P1 and P2, respectively. Planes P1 and P2 are parallel and distinct from each other. They are preferably perpendicular to axis A1. Plane P1 thus intersects the first ring gear but not the second. Similarly, plane P2 intersects the second ring gear but not the first.

[0107] The first and second ring gears are fixedly attached to each other for rotation about axis A1. Therefore, one ring gear cannot rotate about axis A1 by a specified angle unless the other ring gear also rotates by the same specified angle. For example, the first and second ring gears may be fixed or connected to each other via an internal connection. Alternatively, the first and second ring gears may be formed as a single piece or as a single block or component.

[0108] The second movable display unit 20 includes a second gear 21, which specifically has a third gear ring 21b and a fourth gear ring 21c. The third gear ring, for example, has four teeth. For example, the third gear ring comprises a combination of ten teeth equiangularly distributed around the axis A2, six of which are removed or not formed. In other words, it is a combination of ten teeth with six teeth missing. The four teeth of the third gear ring are preferably arranged in the following manner: two juxtaposed teeth, a gap left by the two missing teeth, one tooth, a gap left by the two missing teeth, and one tooth and a gap left by the two missing teeth.

[0109] The fourth gear ring 21c, for example, includes six teeth. For example, the fourth gear ring comprises a combination of ten teeth equiangularly distributed around axis A2, with four teeth removed or missing. In other words, it is a combination of ten teeth with four teeth missing. The six teeth of the fourth gear ring are preferably arranged as follows: two juxtaposed teeth, a gap left by a missing tooth, two juxtaposed teeth, a gap left by a missing tooth, and two juxtaposed teeth, a gap left by two missing teeth. The third and fourth gear rings can be considered to constitute a single gear ring with no missing teeth, with one tooth located on the third gear ring at the angular position where the fourth gear ring lacks a tooth, and one tooth located on the fourth gear ring at the angular position where the third gear ring lacks a tooth. Furthermore, at least one tooth of the third gear ring may also be juxtaposed with at least one tooth of the fourth gear ring.

[0110] These toothless gear ring configurations are adapted to allow driving the second movable unit and also the first movable unit in a specific sequence as described below. In particular, the second control movable unit is also adapted to be driven by the first display movable unit and / or the second display movable unit.

[0111] The second disk 22 includes 10 tens digits 0 to 3. These digits are displayed on the tens digit display disk 22. These digits are displayed in the following order: 0, 0, 1, 1, 1, 2, 2, 2, 3, 3.

[0112] like Figure 3 As shown, the third and fourth ring gears 21b and 21c are juxtaposed at two different levels, located in planes P1 and P2, respectively. Planes P1 and P2 are preferably perpendicular to axis A2. Plane P1 thus intersects the third ring gear but not the fourth. Similarly, plane P2 intersects the fourth ring gear but not the third.

[0113] The third and fourth ring gears are fixedly attached to each other for rotation about axis A2. Therefore, one ring gear cannot rotate by a specified angle about axis A2 unless the other ring gear also rotates by the same specified angle. For example, the third and fourth ring gears may be fixed or connected to each other via an internal connection. Alternatively, the third and fourth ring gears may be formed as a single piece or as a single block or component.

[0114] In addition to the first and second control movable units, the drive mechanism 90 comprises a drive wheel 60 having a seventh toothed ring 61 suitable for driving the first control movable unit directly or indirectly.

[0115] In particular, the drive mechanism 90 may include an intermediate movable unit 50 that cooperates with the seventh gear ring 61 of the drive wheel 60 and the fifth gear ring of the first control movable unit 30 through an obstacle, in particular through meshing. Thus, the seventh gear ring 61 is suitable for indirectly driving the first control movable unit (via the intermediate movable unit 50). The drive mechanism 90 may be of the instantaneous jump type, the semi-instantaneous jump type, or the drag type.

[0116] The driving mechanism 90 is constructed and / or arranged to cause the first control movable unit to advance one step every twenty-four hours, that is, to cause the first display movable unit to rotate one tenth of a circle every twenty-four hours.

[0117] As described above, the first control movable unit 30 can drive the first display movable unit 10 and / or the second display movable unit 20 through its fifth ring gear 30a, in particular, the first ring gear 11b and / or the third ring gear 21b.

[0118] As described above, the second control movable unit 40 can drive the first display movable unit 10 and / or the second display movable unit 20 through its sixth ring gear 40a, in particular, the second ring gear 11c and / or the fourth ring gear 21c. In addition, the second control movable unit is driven by the first display movable unit and / or the second display movable unit.

[0119] The first and second control mobile units 30 and 40 are, for example, coaxial with respect to a third axis A3. Axis A3 is preferably parallel to axes A1 and A2.

[0120] like Figure 4 As shown, the fifth ring gear 30a and the sixth ring gear 40a are juxtaposed at two different levels, located in planes P1 and P2, respectively. Planes P1 and P2 are preferably perpendicular to axis A3. Plane P1 thus intersects the fifth ring gear but not the sixth. Similarly, plane P2 intersects the sixth ring gear but not the fifth.

[0121] The first and second control movable units 30 and 40 are mounted idly relative to each other. In other words, the first and second control movable units can freely rotate relative to each other.

[0122] The fifth and sixth gear rings 30a and 40a each include, for example, 10 teeth. These gear rings may have other numbers of teeth. However, the fifth and sixth gear rings 30a and 40a advantageously have the same number of teeth.

[0123] The first and second toothed rings 11b and 21b arranged at the level of the first plane P1 are each adapted to cooperate with a fifth toothed ring 30a of the first control mobile unit 30 also arranged at the level of the first plane P1. The first control mobile unit 30, in particular the fifth toothed ring 30a, is driven one step every 24 hours.

[0124] The two display mobiles 10 and 20 are also driven by a sixth toothed ring 40a of a second control mobile 40, arranged at the level of the second plane P2 and adapted to cooperate with toothed rings 11c and 21c. Depending on the sequence of the date jumps, this second control mobile 40 can drive the toothed rings 11c and 21c and / or be driven by them.

[0125] Specifically, the drive mechanism 90 drives the fifth ring gear 30a of the first control movable unit 30 forward one step each day via its ring gear 50a. This, in turn, drives the first display movable unit 10 and / or the second display movable unit 20 via the respective ring gears 11b and 21b, depending on the date. Depending on the date, the ring gear 40a of the second control movable unit 40 can be driven by the first display movable unit 10, particularly the ring gear 11c, and / or by the second display movable unit 20, particularly the ring gear 21c. When driven, the second control movable unit 40 can, in turn, drive the first display movable unit 10 via the ring gear 11c and / or the second display movable unit 20 via the ring gear 21c.

[0126] exist Figure 6 In the second modification of the first embodiment shown, only the configuration of the second display movable unit 20 is changed. In this modification, the second display movable unit 20 includes a third ring gear 21b having 7 teeth disposed in plane P1 and a fourth ring gear 21c having 8 teeth disposed in plane P2.

[0127] The third gear ring, for example, comprises a combination of ten teeth equiangularly distributed about axis A2, three of which are removed or not formed. In other words, it is a combination of ten teeth with three teeth missing. The seven teeth of the third gear ring are preferably arranged as follows: three juxtaposed teeth, a gap left by one missing tooth; two juxtaposed teeth, a gap left by one missing tooth; and two juxtaposed teeth, a gap left by one missing tooth.

[0128] The fourth ring of teeth comprises for example a combination of ten teeth distributed equiangularly around the axis A2, two of which are removed or not formed. In other words, it is a combination of ten teeth lacking two teeth. The eight teeth of the fourth ring of teeth are preferably distributed in such a way that eight juxtaposed teeth and the gap left by the two missing teeth.

[0129] The advantage of this variant is in particular to have fewer missing, removed or not formed teeth of the rings of teeth 21b and 21c, which can prevent the arms 81, 82, in particular the arm 82 cooperating with the second mobile unit, from being skewed.

[0130] In the following, reference is made to Figure 9 A second embodiment of the timepiece 120 is described.

[0131] The timepiece 120 is for example a watch, in particular a wristwatch.

[0132] The timepiece 120 comprises a timepiece movement 110. This timepiece movement is intended to be mounted in a timepiece case, so as to be protected from the outside environment.

[0133] The timepiece movement 110 can be an electronic movement or a mechanical movement, in particular an automatic movement.

[0134] The timepiece movement comprises a display device 100 for a time or time-derived reading. The time or time-derived reading is preferably a reading of the date. However, this reading can also be any other type, in particular a numerical reading of more than two digits, for example a reading of the year or a reading of the month or a reading of the hours or a reading of the minutes or a reading of the seconds.

[0135] In this second embodiment, the display device is for example of the "big date" type of date display.

[0136] In this second embodiment, the display device also comprises a calibration mobile unit 70 acting on the intermediate mobile unit 50, in particular on the ring of teeth 50a. Alternatively, calibration can also be achieved by direct driving of the fifth ring of teeth 30a of the first control mobile unit 30. This device can also comprise (instead of the calibration mobile unit 70) an arm for achieving calibration by acting on the mobile unit 50 or on the first control mobile unit 30.

[0137] There can be different design variants for driving the two display discs 12 and 22. All the variants described herein function according to the same sequence of displaying the date, with the same number of teeth on the display mobile units 10 and 20 and on the control mobile units 30 and 40. The only difference between the different variants described is the layout and the number of teeth provided on the third and fourth rings of teeth of the display mobile unit 20.

[0138] Regardless of the embodiment or variant, the first, third and fifth toothed rings preferably have a first base diameter which is substantially the same.

[0139] Regardless of the embodiment or variant, the second, fourth and sixth toothed rings preferably have a second base diameter which is substantially the same.

[0140] Regardless of the embodiment or variant, the first and second base diameters are preferably equal or substantially equal.

[0141] Regardless of the embodiment or variant, the first and second control movable units 30 and 40 are preferably arranged in a coaxial manner. However, it is also possible to arrange them on two different axes while maintaining the same operation of the kinematic chain of the display device.

[0142] Regardless of the embodiment or variant, the first toothed ring 1 lb, the second toothed ring 1 lc, the third toothed ring 21b and the fourth toothed ring 21c, as well as the fifth toothed ring 30a and the sixth toothed ring 40a of the first and second control movable units 30 and 40, preferably all have a substantially identical profile and module. These six toothed rings also have ten teeth (whether missing or not) with the same angular pitch distributed equiangularly around their respective axes. However, these features do not constitute a limitation of the functionality of the device. For example, it is entirely conceivable to have a different number of teeth on the two display movable units 10 and 20 to follow a different order of the numbers on the other two display discs 12 and 22. The number of numbers on the two display movable units 10 and 20 is not necessarily the same. Likewise, the number of teeth on the toothed wheels 11 and 21 need not be the same. The number of teeth on the two control movable units 30 and 40 also has no impact on the order of jumps of the device. The number of teeth of the fifth toothed ring 30a of the first control movable unit 30 can be different from the sixth toothed ring 40a of the second control movable unit 40.

[0143] Regardless of the embodiment or variant, the number of positions available for the teeth on the toothed rings 1 lb, 1 lc, 21b and 21c of the two display movable units 10 and 20 can also be a multiple of the number of numbers inscribed on the display discs 12 and 22.

[0144] Regardless of the embodiment or variant, the engagement of the toothed rings 1 lb, 1 lc, 21b and 21c of the two display movable units 10 and 20 can be achieved by different profiles and / or modules on the toothed rings 30a and 40a of the two control movable units 30 and 40. For example, the toothed rings 30a and 40a can be substantially half the size of the toothed rings 1 lb, 1 lc, 21b, 21c.

[0145] In other design variations, the two display discs 12 and 22 can overlap or partially overlap. It's even possible to arrange the two display discs coaxially. In the case of coaxially stacked display discs, the kinematic chain is configured on four different planes instead of two, since the toothed rings 11b, 11c, 21b, and 21c of the two display movable units 10 and 20 must be coaxial. However, the kinematic chain remains unchanged, as the fifth toothed ring 30a of the first control movable unit 30 can still mesh with the first and third toothed rings 11b and 21b, and the sixth toothed ring 40a of the second control movable unit 40 can still mesh with the second and fourth toothed rings 11c and 21c.

[0146] Regardless of the embodiment or variant, a locking system, in particular a “Maltese cross”, may be added to one or more complementary levels of the display movable units 10 and 20 or of the control movable units 30 and 40 .

[0147] Regardless of the embodiment or variant, the first control movable unit 30 can be driven directly by the intermediate movable unit 50 via the corresponding toothings 30 a and 50 a or teeth in complementary levels not shown here.

[0148] Regardless of the embodiment or variant, the first and second movable units can be driven directly by the first control movable unit 30 (without the aid of the movable units 50 and 60). To this end, the first control movable unit 30 may include a limited number n of teeth, such as one tooth, two teeth, or three teeth (equiangularly distributed), and be configured to produce a rotation of 1 / nth of a turn every 24 hours. This drive can be instantaneous, semi-instantaneous, or drag-type. For example, the movable unit 30 may include only two diametrically opposed teeth, thereby driving the first and second display movable units 10 and 20 on the center line. The control movable unit thus needs to make a half-turn every 24 hours.

[0149] Regardless of the embodiment or variant, the display of the number 0 on the tens display disc 22 can be replaced by a blank, that is, an area of ​​the disc that does not contain a number. Thus, the sequence 0, 0, 1, 1, 1, 2, 2, 2, 3, 3 can be replaced by "blank", "blank", 1, 1, 1, 2, 2, 2, 3, 3.

[0150] Regardless of the embodiment or variant, the movement of a timepiece, in particular a display device, may comprise a click or indexing device 80, in particular a reference Figures 9-13 The pawl or indexing device 80 is described below.

[0151] The pawl or indexing device 80 comprises:

[0152] at least one first arm 81 comprising a first beak 81 a for positioning the first movable unit 10;

[0153] at least one second arm 82 comprising a second beak 82a for positioning the second movable unit 20;

[0154] an elastic member 84 for elastically returning the first arm and the second arm to a configuration for positioning the first and second movable units; and

[0155] A lever 83 is inserted between the elastic return element on the one hand and the first and second arms on the other hand.

[0156] The detent or indexing device 80 is capable of indexing the angular position of each of the first and second movable units, that is, defining a specific angular position for each of the first and second movable units among a specific number of stable angular positions (for example, 10 positions). These positions are the positions that enable the movable units to display information.

[0157] As described above, the first mobile unit 10 is rotatably movable about the axis A1, and the second mobile unit 20 is rotatably movable about the axis A2. The device 80 preferably includes a frame 99 on which the first mobile unit 10 is mounted for rotatable movement about the first axis A1, and on which the second mobile unit 20 is mounted for rotatable movement about the axis A2. This frame can be, in particular, a movement blank, such as a plate or date ring 99.

[0158] The first arm or lever 81 is mounted to pivot relative to the frame 99 about a first arm pivot axis A5 .

[0159] The second arm or lever 82 is mounted for pivoting relative to the frame 99 about a second arm pivot axis A5 .

[0160] The first arm or lever 81, in particular the first beak 81a, is used to cooperate with the first ring gear 11b and the second ring gear 11c of the first gear 11 of the first display movable unit 10. The second arm or lever 82, in particular the second beak 82a, is used to cooperate with the third ring gear 21b and the fourth ring gear 21c of the second gear 21 of the second display movable unit 20. These two arms or levers 81, 82, in particular their beaks, achieve angular indexing of the two display movable units 10 and 20 by interacting with the teeth of the ring gears, as shown in FIG. Figure 2 shown.

[0161] For greater precision, the indexing of the first display movable unit 10 is controlled by a beak or head 81a as part of the arm 81. The head 81a has two side portions 81b and 81c. The arrangement of these two side portions, which cooperate with the side portions of the consecutive teeth of the first and second gear rings 11b and 11c, enables the angular indexing of the first display movable unit 10, as shown in FIG. Figure 10 shown.

[0162] In a similar manner, the second display movable unit 20 is indexed by the beak or head 82a as part of the arm 82. The head 82a has two side portions 82b and 82c. The arrangement of these two side portions, which cooperate with the side portions of the consecutive teeth of the third gear ring 21b and the fourth gear ring 21c, enables the angular indexing of the second display movable unit 20, as shown in FIG. Figure 10 shown.

[0163] The elastic return element 84 achieves the elastic return of the arms or levers 81 and 82 by means of an engagement device 83 (e.g., a lever) capable of transmitting and distributing the force of the elastic return element 84 between the two arms or levers 81 and 82. The engagement device is thus engaged or arranged between the arms or levers 81 and 82 and the elastic return element 84. The elastic return element 84 is mechanically connected to the frame 99. For example, the elastic return element 84 is fixed to the frame 99 at one end. The return element advantageously takes the form of a leaf spring.

[0164] The coupling device 83 preferably comprises a pin 86 guided in a slot 85 formed on the frame. This slot 85, in association with the pin 86, enables the coupling device 83 to provide a first degree of freedom in rotation, in particular about an axis parallel or substantially parallel to the axis A5, and a second degree of freedom in translation relative to the frame, perpendicular or substantially perpendicular to the center line defined by the axes A1 and A2.

[0165] In a variant not shown, the pins may be formed or fixed to the frame and the slots may be formed in the engagement means. In other words, the structure may be reversed in a variant.

[0166] The engagement device 83 comprises in particular a first contact area 83a or 83a' cooperating with the elastic return element 84, in particular with the second end of the leaf spring 84, a second contact area 83b or 83b' cooperating with the first arm or lever 81 and a third contact area 83c or 83c' cooperating with the second arm or lever 82, as Figure 10 shown.

[0167] The spring 84 transmits its restoring force via the first contact area 83a or 83a' to the engagement device 83. This restoring force is then transmitted to and distributed between the first arm 81 and the second arm 82 via the second and third contact areas 83b or 83b' and 83c or 83c', respectively.

[0168] References below Figures 14-16 A second embodiment of the pawl or indexing device 80 is described.

[0169] The second embodiment of the pawl or indexing device 80 differs from the first embodiment of the pawl or indexing device 80 mainly or only in the geometry of the engagement device 83 ′.

[0170] In a second embodiment of the pawl or indexing device 80, the engagement device 83' is Figures 14-16 Advantageously, it has an overall rectangular or trapezoidal cross-section in a plane perpendicular to the axes A1 , A2 and A5 .

[0171] The engagement means 83' comprises in particular a first contact zone 83a' cooperating with the elastic return element 84, in particular with the second end of the leaf spring 84, a second contact zone 83b' cooperating with the first arm or lever 81 and a third contact zone 83c' cooperating with the second arm or lever 82, as Figures 14-16 shown.

[0172] The first contact area 83a' can extend along the smaller base of the trapezoidal cross section. This contact area advantageously constitutes a cam surface 89 which is suitable for contacting the engagement device around the engagement device. Figures 14-16 The spring return element 84 is loaded when it is pivoted about an axis perpendicular to the plane of the leaf spring, in particular about the axis of the pin 86. In fact, relative to the surface 89 which is substantially parallel to the end of the leaf spring 84 Figure 10 The resting or neutral position shown, Figure 14 and 16 In the position shown, the coupling device 83' has translated downwards perpendicularly to the axis A5 in the direction of the leaf spring 84 and has pivoted about the axis of the pin 86. These movements result in a first movement or loading of the elastic return element 84 due to the translation movement of the coupling device 83' and a second movement or loading of the elastic return element 84 due to the rotation performed by the coupling device 83' via the cam surface 89. The cam surface 89 is arranged or formed so that the elastic return element 84 Figures 14-16 Loading and Figure 15 The same as in the construction of Figure 15 In the configuration of , the engagement device has translated downwards perpendicularly to the axis A5 in the direction of the leaf spring 84 and has not pivoted or has performed substantially no pivoting about the axis of the pin 86 .

[0173] The distribution of the force generated by the elastic return element 84 between the two arms 81 and 82 depends on the relative positions of the three contact areas 83a, 83b and 83c or 83a', 83b' and 83c', the geometry of the elastic return element 84 suitable for the arms 81 and 82 and cooperating with the three contact areas 83a, 83b and 83c or 83a', 83b' and 83c', the geometry of the device 83 or 83' and the position of the guiding effect and the relative position between the arms 81 and 82.

[0174] In one variant, the first arm and the second arm may comprise the same integral or unitary component. In this variant, the integral or unitary component may be formed to provide the first and second arms with a degree of freedom of rotation about an axis parallel or substantially parallel or coincident with axis A5, for example by means of a rod-beam controlled elastic pivot. The coupling device 83 or 83' may similarly be part of the integral or unitary component and provide a degree of freedom of rotation about an axis parallel to the axis of rotation of the first and second arms and a second degree of freedom of translation relative to a frame perpendicular or substantially perpendicular to the center line defined by axes A1 and A2 by means of an elastic connection formed for this purpose. The integral or unitary component may comprise a subframe adapted to be fixed to the frame and positioned so that the coupling device can come into contact with the end of the spring. Thus, the proposed movable unit indexing device may be constructed as one or more flexible guide components capable of combining multiple components and / or functions described in this document.

[0175] Irrespective of said variant, the maximum dimension of the engagement means 83 or 83 ′ is preferably at least two times or at least three times smaller than the maximum dimension of the first arm and / or the maximum dimension of the second arm.

[0176] In a variant, the geometry of the elastic return element 84, the engagement means 83 or 83', the arms 81, 82, and therefore also the contact areas 83a, 83b and 83c or 83a', 83b' and 83c' can be modified, thereby changing the distribution of the force transmitted by the elastic return element 84 via the engagement means 83 or 83' to the two arms or levers 81, 82. Using the same logic, these geometric changes make it possible to vary the force generated by the elastic return element 84 and / or its variation, depending on the number of arms or levers actuated. Thus, the restoring force can be adjusted at the level of the lever according to the design requirements.

[0177] In a variant, the various degrees of freedom provided by the coupling device can be achieved without pins or slots. To this end, the coupling device 83 or 83' can be guided, for example, directly via the arms or levers 81, 82 and / or via the elastic return element 84, the geometry of these components naturally being adjusted. This design even allows for the inclusion of additional degrees of freedom, such as a second degree of translational freedom in a plane perpendicular to the axis A5.

[0178] In a variant, the pivoting of the arms or levers 81 and 82 may not be coaxial.

[0179] exist Figure 10 In the variant shown, in particular, the two arms or levers 81 and 82 act opposite each other relative to the axis A5. However, in an alternative variant, in particular in the case of two overlapping or coaxial display mobile units, the two arms or levers 81 and 82 may overlap. In this case, the engagement means 83 or 83' are advantageously positioned relative to the engagement means. Figures 11-13 The plane parallel to the axis is mounted on the pivot connection.

[0180] In a variant, the mobile unit indexing means can also be realized by translationally operated arms or levers 81 and 82. In this case, the engagement means 83 or 83' are advantageously arranged to bear against the ends of the translationally operated arms or levers 81 and 82.

[0181] In different variants, the elastic return element 84 may in particular comprise one or more leaves, or be a helical spring, a flexible guide or any other device capable of exerting a restoring moment or restoring force. The elastic return element may in particular comprise two leaf springs separated by a portion forming a cam suitable for cooperating with the engagement means.

[0182] In a variant, an intermediate component may be added between the engagement means 83 or 83 ′ and the elastic return element 84 .

[0183] By extension, the indexing device 80 can also be operated by more than two arms or levers.

[0184] Different situations are described below in which the actuation of the arms or levers 81 , 82 takes place according to a number of possible sequences when the date jumps.

[0185] Due to the arrangement and configuration of the coupling device 83 or 83', the deformation of the elastic return element 84 when both arms or levers 81, 82 are actuated is advantageously identical or substantially identical to the deformation of the elastic return element 84 when only one of the two arms or levers 81, 82 is actuated. This results in an identical or substantially identical energy consumption, regardless of the number of actuated arms or levers.

[0186] References below Figure 7 and 8 One embodiment of a first method for operating the above-described device 100 or the above-described timepiece movement 110 or the above-described timepiece 120 is described.

[0187] The method includes:

[0188] the step of driving the first display mobile unit 10 by the first control mobile unit 30; and / or

[0189] the step of driving the first display mobile unit 10 by the first control mobile unit 30 and the step of driving the second display mobile unit 20 by the second display mobile unit 10 through the second control mobile unit 40, simultaneously; and / or

[0190] the step of driving the second display mobile unit 20 by the first control mobile unit 30; and / or

[0191] the step of driving the second display mobile unit 20 by the first control mobile unit 30 and the step of driving the first display mobile unit 10 by the second display mobile unit 20 through the second control mobile unit 40, simultaneously.

[0192] In the following, reference is also made to Figures 11-16 A second method for operating the above-described device 80 or the above-described device 100 or the above-described timepiece movement 110 or the above-described timepiece 120 is described.

[0193] The method comprises:

[0194] the step of moving the first arm and / or the second arm by the movement of the first mobile unit 10 and / or the second mobile unit 20 and the step of loading the elastic return element 84 by the movement of the lever 83, 83’; and

[0195] the step of returning the elastic return element 84 (i.e. the step of returning the elastic potential energy) so as to drive the first mobile unit 10 and / or the second mobile unit 20 to rotate by means of the lever 83, 83’ and the first arm and / or the second arm, in particular until the first and / or the second mobile unit reaches its next stable or indexed position.

[0196] In the following, reference is made to Figures 14-16 In the described embodiments, the step of loading preferably has the same intensity in at least two of the following cases:

[0197] by the movement of the first mobile unit;

[0198] by the movement of the second mobile unit;

[0199] by the movement of the first and second mobile units.

[0200] The kinematic chain for driving the display mobile units 10 and 20 by the control mobile units 30 and 40 varies depending on the date to be jumped. In the following, various possible cases are described with particular reference to the first variant of the first embodiment. Figure 7 The illustrations in the figures of the drawings can show these different cases.

[0201] Changing from "29" to "30":

[0202] The display device indicates "29". The ring gear 50a of the intermediate movable unit 50 advances one step in the counterclockwise direction and drives the fifth ring gear 30a of the first control movable unit 30 in the clockwise direction. The fifth ring gear 30a therefore drives the first ring gear 11b of the first display movable unit 10 in the counterclockwise direction. The display of the units digit on the first display disk 12 then changes from the units digit "9" to "0". The fifth ring gear 30a does not drive the third ring gear 21b of the second display movable unit 20. However, as it rotates, the ring gear 11c of the first display movable unit 10 drives the sixth ring gear 40a of the second control movable unit 40, which in turn drives the ring gear 21c of the second display movable unit 20. The display of the tens digit on the second display disk 22 then changes from "2" to "3".

[0203] This driving principle is the same for the change from "09" to "10" and from "19" to "20".

[0204] Change from "30" to "31":

[0205] The display device indicates "30". The ring gear 50a of the intermediate movable unit 50 advances one step in the counterclockwise direction and drives the fifth ring gear 30a of the first control movable unit 30 in the clockwise direction. The fifth ring gear 30a therefore drives the ring gear 11b of the first display movable unit 10 in the counterclockwise direction. The display of the units digit on the first display disk 12 then changes from the units digit "0" to "1". The fifth ring gear 30a does not drive the third ring gear 21b of the second display movable unit 20. However, as it rotates, the ring gear 11c of the first display movable unit 10 drives the sixth ring gear 40a of the second control movable unit 40, which in turn drives the ring gear 21c of the second display movable unit 20. The display of the tens digit on the second display disk 22 then changes to the next digit, that is, from "3" to "3", and "3" is repeatedly displayed on the disk 22.

[0206] This driving principle is the same for the transition from "10" to "11" and from "20" to "21", also repeatedly displaying "1" and "2".

[0207] From "31" to "01":

[0208] The display device indicates "31". The fifth ring gear 50a of the intermediate movable unit 50 is advanced by one step in the counter clockwise direction and drives the fifth ring gear 30a of the first control movable unit 30 in the clockwise direction. The fifth ring gear 30a can no longer drive the ring gear 1 lb of the first display movable unit 10 because it faces a missing, removed or not formed tooth. The fifth ring gear 30a drives the ring gear 21b of the second display movable unit 20 in the counter clockwise direction. The ten's display of the second display disc 22 is then changed to the next ten's digit from "3" to "0". With its rotation the ring gear 21c of the second display movable unit 20 can not be driven by the sixth ring gear 40a of the second control movable unit 40 because the ring gear 21c is missing, removed or not formed here. The first digit display disc 12 of the first display movable unit 10 remains then in place.

[0209] In Figure 11 and 14 In the date change from "31" to "01" only the second display movable unit 20 is driven.

[0210] In the first drive phase of the second arm 82, due to the effect of the rotation of the second display movable unit 20, the second arm 82 is driven in the first rotational direction and lifts the teeth of the ring gear 21b or 21c. The second arm 82 loads the elastic return element 84 with its rotation by the engagement means 83 or 83'. For more precision, the second contact area 83b or 83b' rests against the first arm 81 which remains in place, the engagement means 83 or 83' are turned and due to the mobility of the second arm 82 at the point of abutment of the third contact area 83c or 83c' are moved in translation in the slot 85 in the first movement direction.

[0211] In the second drive phase of the second arm 82 after the teeth tip of the ring gear 21b or 21c, the second arm 82 is driven in the second rotational direction and lowers the teeth of the ring gear 21b or 21c due to the effect of reloading the elastic return element 84 by the engagement means 83 or 83'. The engagement means 83 or 83' are turned and here moved in translation in the second movement direction opposite to the first movement direction.

[0212] From "01" to "02":

[0213] The display device indicates "01". The fifth ring gear 50a of the intermediate movable unit 50 advances one step in the counterclockwise direction and drives the fifth ring gear 30a of the first control movable unit 30 in the clockwise direction. The fifth ring gear 30a can no longer drive the ring gear 11b of the first display movable unit 10 because it faces a missing, removed, or unformed tooth. On the other hand, the fifth ring gear 30a drives the ring gear 21b of the second display movable unit 20 in the counterclockwise direction. The tens digit display of the second display disk 22 then changes to the next digit "0", and the tens digit "0" is repeatedly displayed on the disk 22. As it rotates, the ring gear 21c of the second display movable unit 20 drives the sixth ring gear 40a of the second control movable unit 40, which in turn drives the ring gear 11c of the first display movable unit 10. The units digit display of the first display disk 12 then changes from the units digit "1" to the units digit "2".

[0214] like Figure 12 and 15 As shown, the two display movable units 10 and 20 are driven simultaneously here.

[0215] During the first actuation phase of the two arms, the rotation of the first and second movable display units 10 and 20 causes the first and second arms 81 and 82 to be driven in a first rotational direction, respectively, raising the teeth of the ring gears 11b or 11c and 21b or 21c. As the first and second arms 81 and 82 rotate, they load the elastic return element 84 via the engagement device 83 or 83'. To be more precise, the engagement device 83 or 83' moves translationally in the first direction of motion within the slot 85 due to the combined action of the first arm 81 abutting the second contact area 83b or 83b' and the second arm 82 abutting the third contact area 83c or 83c', thereby loading the elastic return element 84 via the first abutment area 83a or 83a'. Here, the movement of the engagement device 83 or 83' corresponds to a translational or substantially translational movement. The engagement device 83 or 83' is capable of pivoting. However, this potential rotational movement is of relatively small magnitude, or even very small magnitude, compared to its translational movement.

[0216] In the second driving phase of the two arms, after having crossed the tooth tops of the toothed rings 11b or 11c and 21b or 21c, the first and second arms 81 and 82 are driven in the second direction of rotation, lowering the teeth due to the action of reloading the elastic return element 84 by the engagement means 83 or 83'. The latter here moves in translation in a second direction of movement opposite to the first direction of movement.

[0217] These driving principles are the same for the transition from "11" to "12" and from "21" to "22", also repeatedly displaying "1" and "2".

[0218] Change from "02" to "03":

[0219] The display shows "02." The fifth ring gear 50a of the intermediate movable unit 50 advances one step counterclockwise and drives the fifth ring gear 30a of the first control movable unit 30 in the clockwise direction. The fifth ring gear 30a drives the ring gear 11b of the first display movable unit 10 in the counterclockwise direction. The units digit displayed on the first display disk 12 then changes to the next units digit. On the other hand, the tens digit is not driven. In fact, the fifth ring gear 30a can no longer drive the ring gear 21b of the second display movable unit 20 because it faces a missing, removed, or unformed tooth. The ring gear 11c of the first display movable unit 10 also cannot drive the sixth ring gear 40a of the second control movable unit 40 because the teeth of the ring gear 11c are also missing, removed, or unformed here. Therefore, the second control movable unit 40 and the second display movable unit 20, in particular the second display disk 22, remain in place.

[0220] In this case, only the first display movable unit 10 is driven, as shown in FIG. Figure 13 and 16 shown.

[0221] During the first actuation phase of first arm 81, due to the rotation of first movable display unit 10, first arm 81 is driven in the first rotational direction, raising the teeth of ring gear 11b or 11c. As first arm 81 rotates, it loads elastic return element 84 via engagement device 83 or 83'. To be more precise, third contact area 83c or 83c' abuts second arm 82, which remains in place. Engagement device 83 rotates and, due to the mobility of the point where first arm 81 abuts second contact area 83b or 83b', translates in slot 85 in the first direction of movement.

[0222] In a second driving phase of the first arm 81, after having passed over the tooth tips of the ring gear 11b or 11c, the first arm 81 is driven in a second rotational direction, lowering the teeth of the ring gear 11b or 11c due to the action of the coupling device 83 or 83' which reloads the elastic return element 84. The coupling device 83 or 83' rotates and here moves in translation in a second direction of movement opposite to the first direction of movement.

[0223] These driving principles also apply to the other transitions from "03" to "09", as well as the transitions from "12" to "13" and so on up to "19", and the transitions from "22" to "23" up to "29".

[0224] like Figure 5 and 6 As shown and referred to below Figure 8As described, the teeth of the fifth toothing are preferably flattened. In fact, it is particularly necessary to truncate the end of the toothing 30a so that it can only cooperate with the toothings 11b and 21b on the center line passing through the axes A1 and A2, without the risk of the latter interfering with the toothings 11b and 21b away from this center line.

[0225] Thanks to the above solution, the driving is achieved by two different control movable units having substantially the same size as the two gears 11 and 21 of the two display movable units. The overall size in the plane is thus advantageously reduced while providing some flexibility in the layout of the display movable units and the order of display.

[0226] These solutions also allow greater freedom in the arrangement of the date display on the dial, but also in the dimensions of the display disc and therefore in the quality of the date display.

[0227] These solutions do not comprise one larger control mobile unit, but rather two different control mobile units, each in the form of a pinion of the same or substantially same type as the gear fixedly attached to the tens disk and / or the gear fixedly attached to the units disk.

[0228] The indexing device proposed here advantageously makes it possible to employ only one return element suitable for returning two arms or levers that can be operated independently or simultaneously. This type of device thus makes it possible to elegantly solve the problem of the energy consumption variations associated with the simultaneous or non-simultaneous actuation of the two "big date" mobiles.

[0229] Thanks to the solution according to the invention, the energy consumption for driving the "big date" movement is the same or substantially the same whether one or two display mobiles are to be driven. To achieve this, the engagement means provided between the elastic return element and the two arms indexing the two display mobiles can be designed to impart substantially the same movement to the end of the elastic return means in both cases, in a direction perpendicular or substantially perpendicular to the center line passing through axes A1 and A2. Figure 11 and 13 The device is shown displaced by a first magnitude in a direction perpendicular or substantially perpendicular to a centerline passing through axes A1 and A2 as a function of movement of the first or second arm. Figure 12 The device is shown displaced by a second magnitude in a direction perpendicular or substantially perpendicular to a centerline passing through axes A1 and A2 as a result of simultaneous movement of the first and second arms. Figure 11 、 12In the indexing device shown in FIG13 , the first and second amplitudes are sufficiently small that the difference between these two amplitudes does not significantly affect the energy consumption of the movement. Consequently, the energy required to drive the “big date” mechanism remains the same or substantially the same whether one or two display mobiles are to be driven, and is negligible compared to the energy consumed by the timepiece in 24 hours.

[0230] Of course, it is entirely possible to design the first and / or second arms and / or the engagement means so that the second amplitude of movement of the means, in a direction perpendicular or substantially perpendicular to the centerline passing through axes A1 and A2, is equal to the first amplitude of movement of the engagement means, in a direction perpendicular or substantially perpendicular to the centerline passing through axes A1 and A2. This configuration is particularly advantageous when the spring stiffness and / or preload are increased, in particular to ensure the operation of the indexing device. In this case, the energy required to actuate the "big date" mechanism is the same or substantially the same whether one or both display elements are to be actuated.

[0231] Of course, it is entirely possible to form the first arm and / or the second arm and / or the engagement means such that the amplitude of the movement of the engagement means in a direction perpendicular or substantially perpendicular to the center line passing through the axes A1 and A2 varies depending on the arm or arms being driven, in particular depending on the number of arms being driven. Thus, the force transmitted to the arm(s) can vary, in particular depending on the number of arms being driven or depending on which arm is being driven.

[0232] The solution of the timepiece mobile indexing device can be used in any other device using a plurality of indexing arms, such as a day-date calendar, a year or semi-perpetual or perpetual date calendar or a chronograph chain.

[0233] It can also be used in devices where the arm is used, for example, as a movable unit brake, clutch caliper or backlash compensation caliper. These devices can also be equivalent to indexing systems.

[0234] None of the identified prior art documents discloses an indexing device capable of actuating two levers or lever beaks independently of one another or simultaneously cooperating with a single return element, the loading level of which is the same regardless of the number of actuated beaks. In particular, none of the identified documents discloses an indexing device of this type for a “big date” mechanism.

[0235] In this document, "pawl" preferably refers to a position indexing device comprising a beak cooperating with the ring gear, in particular with a gap between two consecutive teeth of the ring gear, to define at least one indexing position of the movable unit, the beak being pressed into the gap by an elastic element.

[0236] In this document, a "ring gear" preferably refers to a combination of one or more teeth.

[0237] In this document, a "mobile unit" preferably refers to an element that is capable of rotating about an axis and performing at least one complete rotation about the axis. The element may comprise a plurality of parts that are fixedly attached to one another during rotation about the axis. The mobile unit advantageously comprises at least one toothed ring adapted to drive the mobile unit in rotation about the axis, in particular by meshing with another toothed ring external to the mobile unit.

Claims

1. A display device (100) for a reading of time or derived from time, comprising: A first display movable unit (10) comprising a first ring gear (11b), a second ring gear (11c) and a first disc (12) with a numeral (13) for displaying the unit digit of the time or a reading derived from the time; a second display movable unit (20) comprising a third ring gear (21b), a fourth ring gear (21c) and a second disc (22) with a tens digit (23) for displaying the time or a reading derived from the time; as well as A driving mechanism (90) for driving the first display movable unit and the second display movable unit, comprising: a first control movable unit (30) comprising a fifth gear ring (30a) adapted to cooperate with the first gear ring and the third gear ring through obstacles; as well as The second control movable unit (40) includes a sixth gear ring (40a) adapted to cooperate with the second gear ring and the fourth gear ring through obstacles.

2. The display device according to claim 1, wherein The fifth gear ring (30a) is adapted to cooperate with the first gear ring and the third gear ring through meshing.

3. The display device according to claim 1, wherein The sixth gear ring (40a) is adapted to cooperate with the second gear ring and the fourth gear ring through meshing.

4. The display device according to claim 1, wherein The first, third and fifth ring gears have substantially the same first basic diameter and / or the second, fourth and sixth ring gears have substantially the same second basic diameter.

5. The display device according to claim 4, wherein: The first base diameter and the second base diameter are equal or substantially equal.

6. The display device according to any one of claims 1 to 5, characterized in that The first control movable unit (30) and the second control movable unit (40) are coaxially arranged on an axis (A3).

7. The display device according to any one of claims 1 to 5, characterized in that The driving mechanism (90) comprises a driving wheel (60) having a seventh gear ring (61) suitable for directly or indirectly driving the first control movable unit.

8. The display device according to any one of claims 1 to 5, characterized in that The second control movable unit is suitable for being driven by the first display movable unit and / or the second display movable unit.

9. The display device according to claim 7, wherein: The driving mechanism (90) includes an intermediate movable unit (50) that cooperates with the seventh gear ring of the driving wheel (60) and the fifth gear ring of the first control movable unit (30) through an obstacle, and / or the driving mechanism (90) includes a calibration movable unit (70) suitable for directly or indirectly driving the fifth gear ring of the first control movable unit (30).

10. The display device according to claim 7, wherein: The driving mechanism (90) includes an intermediate movable unit (50) that engages with the seventh gear ring of the driving wheel (60) and the fifth gear ring of the first control movable unit (30).

11. The display device according to any one of claims 1 to 5, characterized in that The driving mechanism (90) is of instantaneous jump type, semi-instantaneous jump type or drag type.

12. The display device according to any one of claims 1 to 5, characterized in that The first gear ring (11b) includes 9 teeth, the second gear ring (11c) includes 2 teeth, the third gear ring (21b) includes 4 teeth, and the fourth gear ring (21c) includes 6 teeth.

13. The display device according to any one of claims 1 to 5, characterized in that: The first gear ring (11b) includes 9 teeth, the second gear ring (11c) includes 2 teeth, the third gear ring (21b) includes 7 teeth, and the fourth gear ring (21c) includes 8 teeth.

14. The display device according to any one of claims 1 to 5, characterized in that The first disc comprises a series of numbers "0, 1, 2, 3, 4, 5, 6, 7, 8, 9" and / or the second disc comprises a series of numbers "0, 0, 1, 1, 1, 2, 2, 2, 3, 3".

15. The display device according to any one of claims 1 to 5, characterized in that The display device for the time or a reading derived from the time is a date display device, the first disc being a units disc and the second disc being a tens disc.

16. A timepiece movement (110) comprising a display device (100) according to any one of claims 1 to 15.

17. A timepiece (120) comprising the display device (100) according to any one of claims 1 to 15 and / or the timepiece movement (110) according to claim 16.

18. The timepiece according to claim 17, characterized in that The timepiece comprises a watch.

19. The timepiece according to claim 17, wherein: The timepiece comprises a wristwatch.

20. A method for operating a display device (100) according to any one of claims 1 to 15, a timepiece movement (110) according to claim 16, or a timepiece (120) according to any one of claims 17 to 19, characterized in that It includes: The first control movable unit (30) drives the first display movable unit (10); and / or Simultaneously including the steps of the first control movable unit (30) driving the first display movable unit (10) and the first display movable unit (10) driving the second display movable unit (20) via the second control movable unit (40); and / or The first control movable unit (30) drives the second display movable unit (20); and / or Simultaneously, the method includes the steps of the first control movable unit (30) driving the second display movable unit (20) and the step of the second display movable unit (20) driving the first display movable unit (10) via the second control movable unit (40).

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