Display device for enabling a timepiece movement to display the time in a predetermined time zone

Abstract

The invention relates to a display device (2) for a timepiece movement, comprising: an hour display wheel (52) for a predetermined time zone; a chassis (10) intended to pivot in order to cooperate with a sign that is stationary relative to the frame of the timepiece movement, in order to display information, the angular position of the chassis (10) and the hour display wheel (52) being hinged relative to one another in such a way that the angular position of the chassis (10) is associated with the display of information relating to the predetermined time zone, and the device (2) further comprising a selection mechanism arranged: - in response to a predetermined action by a user, to rotate the hour display wheel (52) between a first position associated with a first time zone and a second position associated with a second time zone; and - simultaneously to rotate the chassis (10) progressively, so that said chassis moves from a first position associated with the first time zone to a second position associated with the second time zone.

Description

Technical Field

[0001] The present invention relates to a display device for a watch movement, the display device comprising: an hour display wheel designed to carry hour display elements for a predetermined time zone and specifically driven by a drive wheel of the watch movement; a chassis designed to rotate about a first main axis and cooperating with a marker stationary relative to the frame of the watch movement for displaying information; a movable element mounted on the chassis and rotatable about a second rotation axis different from the first main axis; and a correction mechanism arranged to drive the movable element to a predetermined angular position relative to the frame of the watch movement, regardless of the angular position of the chassis about the first main axis.

[0002] The present invention also relates to a watch movement including such a display device and a watch including such a watch movement. Background Technology

[0003] Such a display device has been disclosed in the prior art.

[0004] For example, patent application EP0921451A1 describes a watch including a case that defines a current hour display hand, pivoting about a first main rotation axis, and carries both a graduated dial and a current minute hand, both pivoting relative to the case about the same second rotation axis. The graduated dial is driven such that it has the same orientation relative to the watch movement's frame in all angular positions of the case. The current minute hand is driven to display the current minute relative to the graduated dial.

[0005] Patent CH702422B1 discloses a similar watch with a track dial for displaying the current hour. For this purpose, the corresponding display device includes a base driven by the watch movement to pivot about a first main axis of rotation. The base carries an hour dial that pivots about a second axis of rotation different from the first axis of rotation, thus always having the same orientation relative to the frame of the watch movement. A current hour display hand is also rotatably mounted on the base and driven to rotate about the second axis of rotation to display the current hour relative to the hour dial. The document specifies that a current minute display hand is mounted on the base and can rotate about the second axis of rotation, and in a particular variant embodiment, it specifies that the base is driven to perform one revolution in twelve or twenty-four hours to display the time in a second time zone. In this case, the base may be provided with markings that cooperate with stationary hour markers.

[0006] Other existing technical documents describe display devices based on the above principles. In particular, although the various structures differ more or less, the basic principles of the display devices are essentially the same. This is especially true for the two examples given above, although these two examples were disclosed twenty years apart.

[0007] Therefore, there is still a need to propose alternative display devices that allow watch brands to stand out from competitors, preferably solutions that offer enhanced legibility compared to known devices. Summary of the Invention

[0008] A primary objective of this invention is to provide a display device with an alternative structure compared to known display devices, thereby offering a clock with a novel appearance and high legibility.

[0009] For this purpose, the present invention relates more specifically to a display device of the type described above, characterized in that the angular position of the chassis and the angular position of the display wheel are hooked relative to each other in such a way that the angular position of the chassis about a first main axis is intended to be associated with the display of information about a predetermined time zone, and the device further includes a selection mechanism arranged to: - rotate the hour display wheel in response to a predetermined action of the user, such that the hour display wheel moves from a first position associated with the display of hours in a first time zone to a second position associated with the display of hours in a second time zone; and - simultaneously rotate the chassis incrementally, such that the chassis moves from the first position associated with the display of information about the first time zone to the second position associated with the display of information about the second time zone.

[0010] Compared to the existing devices described above, these features make it easier to read the time in a predetermined time zone because it depends less on the shape of the dial and more generally on the appearance of the dial. Furthermore, the dial does not move during normal operation of the watch, thus not interfering with time reading. In fact, using complex display devices with multiple simultaneously moving elements can sometimes reduce the legibility of such devices, especially because these displays are often associated with unusual spatial distributions of the display elements showing the current time. Therefore, by proposing a dial that moves only upon user request and displays stationary information during normal operation, the present invention employs a method opposite to these complex display devices with dials driven by the watch movement.

[0011] Preferably, the display wheel can be carried by the chassis and arranged to rotate about the second axis of rotation.

[0012] In this case, it can be further specified that the movable element is a dial with hour markers.

[0013] Therefore, the hour dial can have an advantageous angular orientation, so that the noon position is always aligned with the noon position of the regular stationary dial, and the time in the predetermined time zone can be read normally and intuitively.

[0014] Advantageously, the display device may also include a display wheel for the current minute, which is designed to support the display mechanism for the current minute, and is mounted on the chassis so as to be rotatable about a second axis of rotation. Thus, during normal operation of the respective clock, the current time in a predetermined time zone is displayed in a conventional manner, and the user can adjust the position of the chassis at any time to select the display of the current time in another time zone.

[0015] It can be specified that the display device includes a gear designed to be rotatable about a first axis of rotation relative to the frame of the watch movement, the gear being integral with the chassis, and the selection mechanism including a control element arranged to act on the gear and rotate the gear one step in response to a predetermined action by the user.

[0016] In this case, where the movable element is a dial with hour markers, the device may also include a motion correction mechanism arranged between the movable element and a set of teeth intended to be stationary relative to the watch movement. The motion correction mechanism is arranged such that, for each rotation of the base through a given angle, the movable element rotates through an angle equal to twice that given angle, but in the opposite direction to the rotation of the base.

[0017] Furthermore, in the case where the hour display wheel is supported by a chassis and arranged to rotate about a second axis of rotation, the device may also advantageously include a motion drive mechanism arranged to connect the hour display wheel to a drive wheel of the watch movement. The motion drive mechanism includes planetary gears comprising: a planet carrier intended to be movably connected to the drive wheel of the watch movement and to carry at least one planetary gear engaged with the hour display wheel; and a sun disk engaged with the planetary gears and movably connected to a set of teeth intended to be mounted stationary relative to the frame of the watch movement.

[0018] Typically, preferably, the display device may also include an hour display wheel for the local time zone.

[0019] The present invention also relates to a watch movement having the above-described features and a watch comprising such a watch movement, the watch movement being associated with a support member mounted so as to be stationary relative to the frame of the watch movement and having a time zone-related marking that enables the identification of the time zone. Attached Figure Description

[0020] Other features and advantages of the invention are set forth more clearly in the following detailed description of preferred embodiments, with reference to the accompanying drawings, which are provided by way of non-limiting example, in which:

[0021] Figure 1 This is a schematic front view of a portion of a clock including a display device according to a preferred embodiment of the present invention.

[0022] Figure 2 It is based on Figure 1 A simplified front view of a portion of the display device in a preferred embodiment.

[0023] Figure 3 yes Figure 2 The components shown in the figure are along Figure 2 The simplified cross-sectional view of the cutting line BB shown in the figure.

[0024] Figure 4 It is based on Figure 1 A simplified front view of another part of the display device of the preferred embodiment, and

[0025] Figure 5 yes Figure 4 The component shown along Figure 4 The simplified cross-sectional view of the cutting line AA shown. Detailed Implementation

[0026] Figure 1 This is a schematic diagram of a portion of a clock 1 including a display device 2 according to a preferred embodiment of the present invention, which clearly illustrates its general principle. Naturally, Figure 1 The following detailed description is provided as an illustrative example, and those skilled in the art will be able to make modifications to suit their own needs without necessarily exceeding the scope of the invention as defined by the claims.

[0027] The display device 2 according to the present invention can be directly integrated into a watch movement, or it can be assembled with a basic watch movement as an add-on module without exceeding the scope of the present invention. For the sake of simplicity, the display device 2 in the form of an add-on display module is described below. For the sake of brevity and simplicity, the structural details of the basic watch movement will not be discussed here, as the implementation of the present invention does not directly depend on these details.

[0028] The watch 1 typically includes a case that houses the watch movement (not shown), and a dial 4 is located above the watch movement, in which case the dial 4 has a substantially integral annular shape.

[0029] Dial 4 has an opening 5 that shows a portion of disc 6, which displays the hour (local time) in the local time zone. Disc 6 is divided into 24-hour intervals and is driven by the watch movement to complete one full rotation in 24 hours by rotating counterclockwise.

[0030] Furthermore, the dial 4 has a ring-shaped portion 8 surrounding its inner perimeter, with city names regularly distributed around the entire perimeter, each city name associated with a clearly defined time zone. Some city names are associated with the "---s" symbol, in which case the "s" is positioned in a straight line with adjacent city names to indicate differences related to daylight saving time.

[0031] The center of dial 4 is hollow to allow for the arrangement of a mechanism for displaying the time in another predetermined time zone. This mechanism includes a base ( Figure 2 (Ref. 10 in the reference numerals) The chassis carries an optional closure plate 12 designed to conceal the watch movement, a time zone marker 14 designed to cooperate with the city name on the annular portion 8, and an auxiliary dial 16 that preferably displays hour markers. The display device 2 may, for example, be carried by the mainboard of the basic watch movement.

[0032] As explained in the description below, the display device 2 has a selection mechanism arranged to allow the user to rotate the base 10 about a first main rotation axis 18, which is located at the center of the central opening of the dial 4. For this purpose, the clock 1 may advantageously be provided with a push button 20, which is connected to the selection mechanism in such a way that each time the user presses the push button 20, the base 10 rotates one step in a given rotational direction (clockwise in this case), as a non-limiting example.

[0033] According to the non-limiting embodiment shown, the annular portion 8 of the dial 4 displays twenty-four city names that define the same number of different positions on the chassis 10, each of which is associated with the display of the current time in the corresponding time zone. Therefore, the display device 2 according to the illustrated embodiment is configured such that, in response to twenty-four consecutive presses of the button 20 by the user, the chassis 10 performs a full rotation around itself in steps of 1 / 24th of a rotation.

[0034] Figure 1 The dashed line indicates the angular position that dial 16 will occupy after being pressed twelve times from the position shown by the solid line. As shown, mark 14 serves as a standard pointer associated with the city name, facilitating the reading of the city name facing the front of dial 16.

[0035] The dial 16 is mounted on the base 10 so as to be rotatable about the second axis of rotation 22 and connected to a correction mechanism arranged to keep the angular orientation of the dial 16 relative to the frame of the watch movement constant.

[0036] The chassis 10 also has current time display elements in a predetermined time zone, in this case hour hand 24 and minute hand 26, both arranged to rotate about a second rotation axis 22. Thus, these two hands 24 and 26 are not only driven to display the current time in the predetermined time zone, but also driven to correct their position when the user rotates the chassis 10 and thus the dial 16, as described below.

[0037] The clock 1 also includes a time-setting crown 28, which advantageously has an axial position in which rotation of the time-setting crown 28 corrects the time in the local time zone and the supplementary time zone in a synchronous manner. It may also be advantageous to provide an additional axial position for the crown 28, in which rotation of the crown 28 allows the time in the local time zone or the supplementary time zone to be corrected independently of the time in other time zones.

[0038] The following is for reference. Figures 2 to 5 A preferred example of the structure of display device 2 is described. Figure 2 and Figure 3 These are simplified views of a portion of the display device 2, specifically a front view and a sectional view, showing that this portion maintains the angular orientation of the dial 16 as the chassis 10 moves. Figure 4 and Figure 5 The following are simplified views of a portion of the display device 2, namely the front view and the sectional view, which ensure the proper actuation of the hour hand 24 and the minute hand 26 on the dial 16.

[0039] The chassis 10 and gear 32 are integrally formed, and in this case, gear 32 is rotatably mounted on a component (not shown, e.g., a plate) of the watch movement frame about a first axis of rotation 18 by three screws 30. The chassis 10 and gear 32 have openings aligned with the first axis of rotation 18, which define a channel 34, the function of which will be explained below.

[0040] In this configuration, gear 32 has twenty-four teeth that engage with crossbar 36 to define twenty-four different angular positions of the chassis 10 relative to the watch movement.

[0041] from Figure 2 As can also be seen in the view, push pin 20 is designed to cooperate with a selection mechanism that allows selection of the angular position of the base 10 relative to the watch movement. Therefore, push pin 20 can be more specifically arranged to act on a control element, in this case, a selection lever 38 that rotates relative to the frame of the watch movement.

[0042] The selector lever 38 is positioned and sized to mesh with the gear 32, so that in response to a user pressing the push button 20, the pressure on the push button 20 causes the gear 32 to rotate one step, thereby allowing the user to move from one time zone to the next. For this purpose, the selector lever 38 includes an actuating beak 40 located at the free end of a resilient arm, which returns the selector lever 38 to an idle position (e.g., when the selector lever 38 is returned to the idle position by the integrated resilient return member 42) Figure 2 When (as shown), the actuating beak 40 can retract. Of course, the invention is not limited to the embodiment of the selector lever 38 specifically shown and described, and those skilled in the art will not have any particular difficulty in modifying the invention according to their requirements, thereby not departing from the scope of the invention as defined by the claims.

[0043] The chassis 10 also carries a gear ring 44, which is designed to carry the dial 16 and allow the dial to be driven to rotate relative to the chassis 10. For this purpose, the gear ring 44 is mounted on the chassis 10 so that it can rotate freely relative to the chassis.

[0044] The gear ring 44 is connected to the stationary gear ring 46 via a motion correction mechanism that keeps the angular orientation of the dial 16 constant relative to the frame of the watch movement. In this case, the motion correction mechanism includes a first intermediate wheel 48, the pinion of which engages with the gear ring 44, and the wheel of the first intermediate wheel 48 engages with the wheel of a second intermediate wheel 50, the wheel of the second intermediate wheel 50 itself engaging with the teeth of the stationary gear ring 46.

[0045] The motion correction mechanism advantageously has a transmission ratio such that, for every 1 / 24th of a revolution the chassis 10 makes around the first axis of rotation 18, the dial 16 makes one 1 / 12th of a revolution around the second axis of rotation 22 (the chassis 10 and the dial 16 rotate in opposite directions).

[0046] Therefore, in normal operation, i.e., when the clock 1 displays the time normally without user intervention, the base 10 and the dial 16 have their respective static positions / orientations. When the user wishes to modify the additional time zone (the time of which is indicated by the hour hand 24 relative to the dial 16), he presses the button 20 multiple times as needed to rotate the base 10 until the mark 14 faces the desired city name, and the angular orientation of the dial 16 is kept constant by the motion correction mechanism.

[0047] The following reference Figure 4 and Figure 5 The driving of hands 24 and 26 facing the dial 16 is explained in more detail. Hands 24 and 26 must be driven to indicate the current time in a predetermined time zone, and when the base 10 pivots, hands 24 and 26 must be driven to indicate the current time while maintaining the same angular reference frame, i.e., the dial 16 has a constant angular orientation.

[0048] The display device 2 includes a motion drive mechanism arranged to connect an hour display wheel 52 to a drive wheel (not shown) of the watch movement, the hour display wheel 52 being designed to carry the hour hand 24 for a predetermined time zone. The motion drive mechanism includes an additional minute wheel 54, which is designed to be driven by the drive wheel of the watch movement to complete one full revolution about a first axis of rotation 18 within one hour. The motion of the drive wheel of the watch movement is transmitted to the additional minute wheel 54 via a channel 34. Therefore, the rotational motion of the additional minute wheel 54 is independent of any rotational motion of the chassis 10.

[0049] The additional minute wheel 54 engages with the first wheel of the intermediate drive wheel 56, which has a second wheel that engages with the hour wheel 58, which is mounted on the chassis 10 to pivot about the second axis of rotation 22 and is designed to carry the minute hand 26.

[0050] The hour display wheel 58 carries two planetary gears 60 that mesh with the hour display wheel 52. At the same time, each planetary gear 60 also meshes with the teeth of the sun disk 62, which is coaxial with the hour display wheel 52.

[0051] The sun disk 62 is part of the sun gear 64, which also carries a compensating sun disk 66 that meshes with a pinion of a second intermediate gear 50, which meshes with a stationary gear ring 46. Disks 62 and 66 are thus constrained to rotate together.

[0052] In normal operation, i.e., when the clock 1 is running without any intervention from the user (especially for rotating the base 10), the sun disk 62 is stationary, as long as it is kinematically connected to the fixed gear ring 46. The teeth of the hour display wheel 52 and the sun disk 62 each have substantially the same pitch circle diameter, but slightly different numbers of teeth, such that when the planetary gear 60 rolls on the stationary teeth of the sun disk 62, the wheel causes the hour display wheel 52 to rotate slightly in a clockwise direction at such a speed that it completes one revolution in twelve hours. The operating principle of this particular action is not described in detail here, as it was already disclosed in an earlier patent application published as CH715546A2, the teachings of which are incorporated herein by reference regarding the implementation of the connection between the hour division wheel 58 and the hour display wheel 52.

[0053] It is also apparent from the foregoing that the wheels arranged to rotate about the second axis of rotation 22 form a planetary gear, which is actuated when the user acts on the pusher 20 to rotate the chassis 10. During such operation, the time zone wheel 58 continues to serve as the first input to the planetary gear through its connection with the drive wheel of the watch movement, but also serves as a planetary carrier together with the planetary gear 60. The sun disk 62, which engages with the planetary gear 60, serves as the second input because it is driven by the second intermediate wheel 50, which is forced to roll on the teeth of the stationary gear ring 46 as the chassis 10 rotates about the first axis of rotation 18. The hour display wheel 52 serves as the output by driving the hour hand 24 of a predetermined time zone according to the motion of the time zone wheel 58 and the chassis 10. Therefore, during the rotation of the chassis 10, the planetary gear 60 is driven by the sun disk 62 to rotate faster than during normal operation and drive the hour hand 24 so as to switch from displaying the time in the first time zone to displaying the time in the second time zone in response to the user's action on the button 20, during the time corresponding to the movement time of the chassis 10.

[0054] Adjust the transmission ratio contained in the planetary gears and between the planetary gears and the stationary ring gear 46 so that when the chassis 10 rotates by 1 / 24 of a revolution, the clock hand 24 rotates by 1 / 12 of a revolution (in this case, rotating in the same direction of rotation).

[0055] It should be noted that the drive wheel of the watch movement can be, for example, a conventional minute wheel (which may be modified to not have a standard minute wheel tube designed to carry the minute hand), and this minute wheel can also be connected to the local time display element. Thus, the time-setting crown 28 can be arranged to act on the minute wheel of the watch movement in a conventional manner to correct the time, and then the corresponding movement of the minute wheel is simultaneously transmitted to the local time display element 6 and the display element 24 in the predetermined time zone.

[0056] As can be clearly seen from the foregoing description, the present invention provides a novel and particularly legible display device 2, which has a finite total number of parts, thereby requiring relatively few modifications to the basic watch movement.

[0057] The above description is intended to illustrate specific embodiments by way of illustrative and non-limiting example, and the invention is not limited to the implementation of certain specific features described above, such as the nature of the information displayed by the various display elements described, or the shape and manner in which certain components are manufactured, as these components can be modified without affecting the implementation of the invention, such as the shape of the chassis 10 or the shape of the components of the selection mechanism. In particular, it should be noted that the chassis 10 may carry a single display element in a controlled position relative to the frame of the watch movement, which would allow for intuitive reading of the displayed information without requiring a dial with graduated scales that must remain stationary. In this case, the displayed information may differ from the time in a predetermined time zone, and the hour display wheel 52 may be arranged to pivot about the first axis of rotation 18 without exceeding the scope of the invention. Similarly, the minute display hand 26 may also be arranged to pivot about the first axis of rotation 18 independently of the position of the hour display hand 24 without exceeding the scope of the invention. Furthermore, the chassis 10 may have different shapes and may be larger to allow the chassis to carry one or more additional display wheels, which may be associated with additional tracked dials (moving as requested by the user). Furthermore, when displaying the time in an additional time zone, the time in a half-hour time zone can also be displayed by providing a variable gear to the teeth of gear 32 without exceeding the scope of the invention as defined by the claims.

Claims

1. A display device (2) for a watch movement, the display device comprising: The hour display wheel (52) is designed to carry the hour display element (24) for a predetermined time zone and is specifically driven by the drive wheel of the watch movement; A chassis (10) designed to rotate about a first main axis (18) and to cooperate with a marker stationary relative to the frame of the watch movement in order to display information; A movable element, which is mounted on the chassis (10) and is rotatable about a second rotation axis (22) different from the first main axis (18); A correction mechanism is arranged to drive the movable element to a predetermined angular position relative to the frame of the watch movement, regardless of the angular position of the chassis (10) about the first main axis (18). Its features are, The angular positions of the chassis (10) and the hour display wheel (52) are linked relative to each other in such a way that the angular position of the chassis (10) around the first main axis (18) is intended to be associated with the display of stationary information about the predetermined time zone, and The display device (2) further includes a selection mechanism, which is arranged as follows: - In response to a predetermined action by the user, the hour display wheel (52) is rotated, causing the hour display wheel (52) to move from a first position associated with the hour display in a first time zone to a second position associated with the hour display in a second time zone; and - Simultaneously, the chassis (10) is gradually rotated, causing the chassis (10) to move from a first position associated with the display of information about the first time zone to a second position associated with the display of information about the second time zone.

2. The display device (2) according to claim 1, characterized in that, The hour display wheel (52) is supported by the chassis (10) and arranged to rotate around the second rotation axis (22).

3. The display device (2) according to claim 2, characterized in that, The movable element is a dial (16) with hour markers.

4. The display device (2) according to claim 2, the display device further comprising a display wheel (58) for the current minute, the display wheel for the current minute being designed to carry a display mechanism (26) for the current minute, the display wheel for the current minute being mounted on the chassis (10) so as to be rotatable about the second rotation axis (22).

5. The display device (2) according to claim 3, the display device further comprising a display wheel (58) for the current minute, the display wheel for the current minute being designed to carry a display mechanism (26) for the current minute, the display wheel for the current minute being mounted on the chassis (10) so as to be rotatable about the second rotation axis (22).

6. The display device (2) according to claim 1, characterized in that, It includes a gear (32) designed to rotate about the first main axis (18) relative to the frame of the watch movement, the gear (32) being integral with the chassis (10), and The selection mechanism includes a control element (38) arranged to act on the gear (32) and rotate the gear (32) one step in response to the user's predetermined action.

7. The display device (2) according to claim 2, characterized in that, It includes a gear (32) designed to rotate about the first main axis (18) relative to the frame of the watch movement, the gear (32) being integral with the chassis (10), and The selection mechanism includes a control element (38) arranged to act on the gear (32) and rotate the gear (32) one step in response to the user's predetermined action.

8. The display device (2) according to claim 3, characterized in that, It includes a gear (32) designed to rotate about the first main axis (18) relative to the frame of the watch movement, the gear (32) being integral with the chassis (10), and The selection mechanism includes a control element (38) arranged to act on the gear (32) and rotate the gear (32) one step in response to the user's predetermined action.

9. The display device (2) according to claim 6, wherein, The movable element is a dial (16) with hour markers, characterized in that the display device (2) includes a motion correction mechanism arranged between the dial (16) and a set of teeth intended to be mounted stationary relative to the frame of the watch movement, the motion correction mechanism being arranged such that, for each rotation of the base (10) through a given angle, the dial (16) rotates through an angle equal to twice the given angle, but in the opposite direction to the rotation direction of the base (10).

10. The display device (2) according to claim 7, wherein, The movable element is a dial (16) with hour markers, characterized in that the display device (2) includes a motion correction mechanism arranged between the dial (16) and a set of teeth intended to be mounted stationary relative to the frame of the watch movement, the motion correction mechanism being arranged such that, for each rotation of the base (10) through a given angle, the dial (16) rotates through an angle equal to twice the given angle, but in the opposite direction to the rotation direction of the base (10).

11. The display device (2) according to claim 8, characterized in that, The display device (2) includes a motion correction mechanism arranged between the dial (16) and a set of teeth intended to be stationary relative to the frame of the watch movement. The motion correction mechanism is arranged such that, for each rotation of the base (10) through a given angle, the dial (16) rotates through an angle equal to twice the given angle, but in the opposite direction to the rotation of the base (10).

12. The display device (2) according to claim 2, characterized in that, It includes a motion drive mechanism arranged to connect the hour display wheel (52) to a drive wheel of the watch movement, the motion drive mechanism including planetary gears comprising: - A planetary carrier (58) designed to be movably connected to the drive wheel of the watch movement and to carry at least one planetary wheel (60) engaged with the hour display wheel (52); and - A sun disk (62), which engages with the at least one planetary gear (60) and is kinetically connected to a set of teeth intended to be mounted stationary relative to the frame of the watch movement.

13. The display device (2) according to claim 3, characterized in that, It includes a motion drive mechanism arranged to connect the hour display wheel (52) to a drive wheel of the watch movement, the motion drive mechanism including planetary gears comprising: - A planetary carrier (58) designed to be movably connected to the drive wheel of the watch movement and to carry at least one planetary wheel (60) engaged with the hour display wheel (52); and - A sun disk (62), which engages with the at least one planetary gear (60) and is kinetically connected to a set of teeth intended to be mounted stationary relative to the frame of the watch movement.

14. The display device (2) according to claim 7, characterized in that, It includes a motion drive mechanism arranged to connect the hour display wheel (52) to a drive wheel of the watch movement, the motion drive mechanism including planetary gears comprising: - A planetary carrier (58) designed to be movably connected to the drive wheel of the watch movement and to carry at least one planetary wheel (60) engaged with the hour display wheel (52); and - A sun disk (62), which engages with the at least one planetary gear (60) and is kinetically connected to a set of teeth intended to be mounted stationary relative to the frame of the watch movement.

15. The display device (2) according to claim 10, characterized in that, It includes a motion drive mechanism arranged to connect the hour display wheel (52) to a drive wheel of the watch movement, the motion drive mechanism including planetary gears comprising: - A planetary carrier (58) designed to be movably connected to the drive wheel of the watch movement and to carry at least one planetary wheel (60) engaged with the hour display wheel (52); and - A sun disk (62), which engages with the at least one planetary gear (60) and is kinetically connected to a set of teeth intended to be mounted stationary relative to the frame of the watch movement.

16. The display device (2) according to claim 1, characterized in that, It also includes an hour display wheel (6) for the local time zone.

17. The display device (2) according to claim 2, characterized in that, It also includes an hour display wheel (6) for the local time zone.

18. The display device (2) according to claim 3, characterized in that, It also includes an hour display wheel (6) for the local time zone.

19. A watch movement comprising a display device (2) according to any one of claims 1 to 18.

20. A clock (1) comprising a clock movement and a support (4), the clock movement including a display device (2) according to any one of claims 1 to 18, the support being mounted so as to be stationary relative to the frame of the clock movement and carrying a time zone-related mark that enables the identification of the time zone.

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