CH719557A2 - Timepiece moon phase display mechanism. - Google Patents

Abstract

The invention relates to a moon phase display mechanism (100) for a timepiece capable of being driven by a clock movement (200) whose operation depends on the division of time, said moon phase display mechanism moon phases (200) comprising: a moon phases indicator (110) carrying at least one representation of the moon; a jumping drive mechanism (120) for the moon phase indicator (110) adapted to be driven by said clockwork movement (100) and to jump drive the moon phase indicator (110); the moon phase display mechanism (100) being characterized in that the jumping drive mechanism (120) is configured to rotate said moon phase indicator (110) by n increments per day, n being greater to 1, each increment causing the moon phase indicator (110) to rotate by an angle α corresponding to the angle of rotation of a daily step divided by the number n of increments.

Description

Technical field of the invention

[0001] The field of the invention concerns mechanisms for displaying the moon phases of timepieces making it possible to display information relating to the state of the moon during a complete lunar period.

[0002] The invention also relates to a watch movement comprising such a moon phase display mechanism.

[0003] The invention also relates to a timepiece, for example a wristwatch, comprising a watch movement comprising such a moon phase display mechanism.

Technology background

[0004] The moon phase display mechanisms make it possible to display information relating to the state of the moon during a lunar period. This theoretical lunation period is precisely 29 days, 12 hours, 44 minutes and 2.8 seconds.

[0005] The most common moon phase display mechanisms are mechanisms having a jumping drive of a 59-tooth star carrying a disk comprising two representations of the moon, part of this disk being visible to the user through an opening of a suitable shape and provided in the dial of the watch and successively revealing the different phases of the moon: a waxing moon, a full moon, a waning moon and a new moon.

[0006] The 59-tooth star is driven once a day by a 24-hour wheel. Such a moon phase display mechanism makes it possible to obtain a period of 29.5 days per displayed lunation, which makes it possible to obtain an approximate result with a reliable, space-saving and inexpensive mechanism. However, such a mechanism accumulates an error at each lunation which must be compensated for every 2.65 years by a correction device.

[0007] The search for a more precise moon phase display mechanism is a constant in the field of watchmaking.

[0008] Most of the known moon phase display mechanisms aim to improve the precision of the lunation by getting as close as possible to the theoretical value of a lunation period, using a multitude of mechanisms and precise gear ratio to get as close as possible to the theoretical value of a lunation.

[0009] Thus, more complex mechanisms for displaying the moon phases, of the jumping type, are known, making it possible to obtain a lunation of 29.53125 days, which makes it possible to reduce the correction to one day every 122.4 years. .

[0010] There are also mechanisms for displaying the moon phases of the trailing type making it possible to further increase the precision over a lunation making it possible to reduce the correction to one day every 292 years and 279 days, or even one day every 1866 years with complex and very bulky mechanisms.

[0011] Trailing type moon phase display mechanisms have the advantage of allowing a more precise real-time display of the state of the moon over a day with respect to the lunar body. Indeed, with this type of mechanism, the moon is driven throughout the day, unlike a jumping type display mechanism where the moon disk is driven by jumping once per day.

[0012] Consequently, training by jumping the display generates a “display error” of the state of the moon in relation to the lunar body which constantly changes throughout the day. This “display error” inherent to this type of jumping training represents a maximum cumulative error of 6.1° per day in the display, regardless of the lunation accuracy of the moon phase display mechanism as well. complex as it is.

Summary of the invention

[0013] In this context, the invention proposes a jumping type moon phase display mechanism having an improved display resolution compared to the moon phase display mechanisms of the state of the art, allowing to the jumping type moon phase display mechanisms to reduce this “display error”, to be more faithful to reality and to get closer to the state of the lunar body without complicating the display mechanism. display and by doing away with a dragging type display mechanism that is expensive, bulky, complex to produce and implement.

[0014] For this purpose, the subject of the invention is a moon phase display mechanism for a timepiece capable of being driven by a clockwork movement whose operation depends on the division of time, said mechanism the moon phase display comprising: – a moon phase indicator carrying at least one representation of the moon; – a driving mechanism jumping from the moon phase indicator capable of being driven by said clockwork movement and of driving the moon phase indicator by jumping; the moon phase display mechanism being characterized in that the jumping drive mechanism is configured to rotate said moon phase indicator by n increments per day, n being greater than 1, each increment rotating the moon phase indicator by a corresponding angle α to the angle of rotation of a daily step divided by the number n of increments.

[0015] The jumping drive mechanism further comprises: – a cam comprising a high zone forming a drive finger, said cam being able to be driven by the clockwork movement; – a phase rocker mounted to pivot around a pivot axis, said phase rocker comprising at one of its ends a feeler sensing the movements of the cam and comprising at the other of its ends a correction nozzle animating said moon phase indicator each time the upper zone of the cam passes.

[0016] According to the invention, the cam is rotated so as to make a complete rotation in 12 hours and the cam has two upper zones opposite at 180° forming two drive fingers configured to rotate the phase rocker and drive said moon phase indicator four times a day; said moon phase display mechanism being configured to achieve a lunation period of 29.53125 days and in that the moon phase indicator is incremented four times per day by an angle of 1.525° so as to achieve a daily rotation of 6.1°.

[0017] In addition to the characteristics mentioned in the previous paragraph, the moon phase display mechanism according to the invention may have one or more complementary characteristics among the following, considered individually or in all technically possible combinations: – the mechanism the jumping drive comprises an intermediate phase drive mobile driven in rotation by the phase rocker, said intermediate phase drive mobile meshing with the moon phase indicator; – the intermediate phase drive mobile comprises a phase drive star configured to be rotated by the phase rocker, and a phase drive pinion secured in rotation to the phase drive star, said phase drive pinion being meshed with a phase wheel which comprises the moon phase indicator; – the jumping drive mechanism comprises a jumper cooperating with the intermediate phase drive mobile to index and maintain the position of said intermediate phase drive mobile between each increment; – the moon phase display mechanism includes a rapid correction device that can be activated by the user to correct the position of the moon phase indicator; – the rapid correction device comprises a correction star carried by the intermediate phase drive mobile and configured to be driven by a phase correction command; – the phase wheel has 109 teeth, the phase drive pinion has 16 teeth and the phase drive star has 18 teeth; – said correction star has 9 teeth; – the moon phase display mechanism includes a safety device to disengage the jumping drive mechanism when a rapid correction action via said rapid correction device occurs simultaneously with the drive of the moon phase indicator by the jumping training mechanism.

[0018] The invention also relates to a watch movement comprising a moon phase display mechanism according to the invention.

[0019] Advantageously, the clock movement comprises a timer mobile, an hour wheel, and a minute center pinion, said moon phase display mechanism comprising a cam comprising a high zone forming a finger of drive, said cam being driven by the rotation of the hour wheel.

Advantageously, the cam is positioned coaxially with the hour wheel and mounted freely in rotation relative to the hour wheel.

[0021] Advantageously, the cam comprises an indexing element extending in the direction of the hour wheel and in that the hour wheel has a slot configured to receive the indexing element, said slot forming stops limiting the relative rotation of the cam with respect to the hour wheel.

[0022] The invention also relates to a timepiece comprising a moon phase display mechanism according to the invention or comprising a clock movement according to the invention.

Advantageously, the timepiece is a wristwatch.

Brief description of the figures

[0024] The aims, advantages and characteristics of the present invention will appear on reading the detailed description below with reference to the following figures: – Figure 1 illustrates a perspective view of an exemplary embodiment of a mechanism display of the moon phases according to the invention; – Figure 2 illustrates a top view of the exemplary embodiment of the moon phase display mechanism illustrated in Figure 1; – Figure 3 illustrates a bottom view of the exemplary embodiment of the moon phase display mechanism illustrated in Figure 1; – Figure 4 illustrates in perspective a portion of a jumping drive mechanism of the moon phase display mechanism according to the invention.

[0025] In all the figures, the common elements bear the same reference numbers unless otherwise specified.

Detailed description of the invention

The present invention consists of the general idea of splitting the daily training step of the moon phase indicator of a moon phase display mechanism, of the jumping type, to improve the resolution of display the moon phase indicator and get as close as possible to the real state of the lunar body during the day.

[0027] In the present application, the term “daily step” means the daily angular step taken by a moon phase indicator as a function of the approximate lunation period of the moon phase display mechanism.

[0028] Figure 1 illustrates a perspective view of an exemplary embodiment of a moon phase display mechanism 100 according to the invention.

Figure 2 illustrates a top view of the exemplary embodiment of the moon phase display mechanism 100 illustrated in Figure 1, and Figure 3 illustrates a bottom view of this same exemplary embodiment.

The moon phase display mechanism 100 according to the invention is a jumping type display mechanism, that is to say that the moon phase indicator carrying the representations of the moon does not is not in permanent constraint with the cog of a clockwork movement. Thus, such a mechanism is completely different, both from a functional and structural point of view, from a trailing type moon phase display mechanism whose moon phase indicator is constantly in contact with the gear train. of the clockwork movement driven by it.

The moon phase display mechanism 100 according to the invention is intended to be housed in a timepiece, for example a case of a wristwatch (not shown).

The moon phase display mechanism 100 according to the invention is driven by a clockwork movement 200, partially shown in Figures 1 to 3, that is to say a mechanism whose operation depends on the division of time.

[0033] More precisely, the clock movement 200 notably comprises a timer wheel 210 comprising a timer pinion 211 and a timer wheel 212. The timer pinion 211 drives an hour wheel 220, and the assembly is configured so that the 220 hour wheel makes a complete revolution in 12 hours.

[0034] In the exemplary embodiment illustrated in Figures 1 to 3, the hour wheel 220 is at the center of the clock movement 200, and therefore forms the center wheel. The hour wheel 220 includes a cylindrical zone 222 carrying an hour hand (not shown). A minute hand (not shown) is carried by a carriageway 231 of a minute center pinion 230 mounted coaxially with the hour wheel 220. The minute center pinion 230 meshes with the timer mobile 210, and more particularly the timer wheel 212.

The moon phase display mechanism 100 comprises a moon phase indicator 110, at least part of which is intended to be visible to the user through an opening of suitable shape and provided in a dial of the part clockwork (not shown), so as to successively reveal the different phases of the moon: a waxing moon, a full moon, a waning moon and a new moon.

The moon phase indicator 110 is set in motion by a jumping drive mechanism 120 driven at regular intervals by the clock movement 100 and/or by a user via a rapid correction device 300.

The moon phase indicator 110 carries at least one representation of the moon. In the example shown, the moon phase indicator 110 has two representations of the moon.

[0038] In the embodiment shown, the moon phase indicator 110 is formed by an upper disc 111 carrying the two representations of the moon. The upper disk 111 is mounted integral with a phase wheel 112 comprising a plurality of teeth.

[0039] The jumping drive mechanism 120 comprises a phase drive element directly driven by the rotation of the hour wheel 220. The phase drive element cooperates with a phase rocker 130 which is pivotally mounted around of a pivot axis 2. The phase rocker 130 pivots under the action of the phase drive element so as to interact with the moon phase indicator 110 and cause it to rotate at each tilting of the phase rocker 130.

[0040] In the exemplary embodiment illustrated in Figures 1 to 3, the phase driving element is formed by a cam 121 driven directly by the clock movement 200. More particularly, the cam 121 is driven in rotation directly by the hour wheel 220 and is mounted coaxially with the hour wheel 220.

[0041] In this first embodiment, the cam 121 is inserted between the hour wheel 220 and the center pinion 230; however other arrangements are also envisaged.

[0042] Figure 4 more particularly illustrates the cam 121, acting as a phase drive element, mounted coaxially with the hour wheel 220 and the center pinion 230. In this figure 4, the hour wheel 220 n is not shown in order to better visualize the cam 121 and its interaction with the phase rocker 130.

The cam 121 is mounted to rotate freely around the axis of rotation 6 of the hour wheel 220.

[0044] The cam 121 delimits an external profile 123 constituting a probing profile configured to interact with the phase rocker 130. The external profile 123 comprises a high probing zone which is radially the zone farthest from the axis of rotation 6 of the hour wheel 220. This upper sensing zone forms a drive finger 124 configured to come into contact with the phase rocker 130 and to cause it to tilt during the rotation of the cam 121.

[0045] At this driving finger 124, the cam 121 comprises a pin 125, or other indexing element, projecting relative to the upper surface of the cam 121, so that the pin 125 extends towards the hour wheel 220 located above the cam 121, so as to cooperate with the hour wheel 220.

The pin 125 is configured to insert and cooperate with a slot 221 provided at the body of the hour wheel 220. The slot 221 defined by its shape of stops making it possible to limit the relative rotation of the cam 121 by relative to the hour wheel 220. Thus, when the pin 125 secured to the cam 121 abuts against the peripheral edges of the slot 221, the hour wheel 220 causes cam 121 to rotate.

[0047] The relative rotation of the cam 121 relative to the hour wheel 220 makes it possible in particular to avoid constraining the hour wheel 220 during the return of the phase rocker 130 to its rest position under the elastic force of means elastics 150.

[0048] Here, in the exemplary embodiment illustrated in Figures 1 to 4, the cam 121 is a 12 o'clock cam since it has a single driving finger and performs a complete rotation in 12 hours in the same way as the rotation of the hour wheel 220.

Of course, other examples of embodiment are envisaged, in particular it is planned to use intermediate wheels and ratios different from 1 relative to the hour wheel 220 and/or a cam profile comprising a plurality of high zones forming training fingers 124 to increase the number of tilting of the phase rocker 130 during one revolution of the hour wheel 220, that is to say in 12 hours.

The phase rocker 130 is pivotally mounted around a pivot axis 2 and is switched between a rest position and an activation position by the passage of the drive finger 124 of the cam 121.

[0051] As illustrated in Figures 3 and 4, the phase rocker 130 comprises a first arm 131 having at its end a feeler 132 configured to cooperate with the drive finger(s) 124 of the cam 121. More particularly, the phase rocker 130 tilts each time a driving finger passes during the rotation of the cam 121 driven by the hour wheel 220.

[0052] The phase rocker 130 further comprises a second arm 133 which has at its end a correction nose 134 configured to rotate the moon phase indicator 110 each time the phase rocker 130 tilts.

[0053] The phase rocker 130 cooperates with elastic return means 150, for example a return spring, tending to position the phase rocker 130 in the rest position between each tilt.

[0054] For example, the phase rocker 130 is repositioned against a positioning stop (not shown) making it possible to define the rest position of the phase rocker 130. Such a positioning stop makes it possible, for example, to avoid permanent contact of the feeler 132 on the external profile 123 of the cam 121. Thus, the contacts between the different parts are minimized and the wear of the parts is reduced.

The operation of the moon phase display mechanism 100 according to the invention is as follows: the hour wheel 220 turns clockwise, conventionally driven by the timer wheel 210.

[0056] At each rotation of the hour wheel 220, the drive finger 124 of the cam 121, constrained by the rotation of the hour wheel 220, via the pin 125 and the light 221, comes into contact with the feeler 132 of the phase rocker 130. The shapes and geometries of the driving finger 124 of the cam 121 and of the feeler 132 of the phase rocker 130 are configured to ensure the pivoting of the phase rocker 130 during rotation of the cam 121 to its activation position, making it possible to increment and angularly shift the moon phase indicator 110.

[0057] The moon phase display mechanism 100 according to the invention is configured so that the jumping drive mechanism 120 rotates the moon phase indicator 110 by n increments per day, n being greater than 1 , each increment causing the moon phase indicator 110 to rotate by an angle α corresponding to the angle of rotation of a daily step divided by the number n of increments.

[0058] For example, with the use of a 12 o'clock cam, the moon phase indicator 110 is incremented twice per day instead of only once per day as for jumping type display mechanisms. of the state of the art.

[0059] The different gears are dimensioned so that the overall rotation of the moon phase indicator 110 over a day remains identical to the daily step of a conventional moon phase indicator set in motion by a drive mechanism jumping from the state of the art.

[0060] Thus, for a moon phase display mechanism 110 configured to obtain a lunation period of 29.53125 days, the moon phase indicator 110 according to the invention will be set in motion twice per day ( every 12 hours) by an angle α of 3.05° to arrive at a daily step corresponding to a rotation of 6.1°.

[0061] Of course, it is also envisaged to further reduce the resolution of displaying the state of the moon of the moon phase display mechanism according to the invention, and therefore increase the number of increments per day of the moon phase indicator 110 while reducing the angular jump of each increment, without further complicating the jumping drive mechanism 120.

[0062] This is possible for example by multiplying the number of drive fingers 124 on the external profile 123 of the cam 121, in order to tilt the phase rocker 130 several times per revolution of the hour wheel 220, while configuring the different gears so that the overall rotation over a day of the moon phase indicator 110 remains identical to the daily training step, here 6.1° for a lunation of 29.53125 days.

[0063] For example, the cam 121 may include two drive fingers 124 opposite each other (that is to say opposite 180°), so that the phase rocker 130 is tilted twice per turn of the hour wheel 220, or four times a day. Thus, the different gears are dimensioned so that each increment of the moon phase indicator 110, occurring here every six hours, corresponds to a rotation of an angle α of 1.525° of the moon phase indicator 110 of so as to preserve an overall rotation of 6.1° per day corresponding to the daily step.

[0064] Such a variant makes it possible to further improve the accuracy of displaying the state of the moon over a day in relation to the lunar body, although the daily step is still 6.1°.

[0065] In the exemplary embodiment illustrated in Figures 1 to 4, the hour rocker 130 does not cooperate directly with the phase wheel 112. In fact, the jumping drive mechanism 120 comprises an intermediate mobile for driving the phases 140 located between the phase rocker 130 and the moon phase indicator 110, and more particularly the phase wheel 112.

[0066] According to an alternative embodiment not shown, it is also envisaged that the phase rocker 130 directly drives the phase wheel 112, without the use of an intermediate phase drive mobile.

[0067] More particularly, the intermediate phase drive mobile 140 comprises a phase drive star 141 integral in rotation with a phase drive pinion 142 meshing with the phase wheel 112 of the phase indicator moon 110.

[0068] The phase drive star 141 cooperates with a jumper 160 configured to hold the phase drive star 141 in position between each jump (or increment) of the phase drive star 141 operated by the phase shift 130.

[0069] The jumper 160 is movable around a pivot axis 4 and conventionally cooperates with an elastic means 161 tending to position the jumper 161 between two teeth of the phase drive star 141, once the high point of a tooth has passed under the action of the phase rocker 130.

[0070] Advantageously, the jumper 160 does not act directly on the phase wheel 112 but on the intermediate phase drive mobile 140, and more particularly on the phase drive star 141. The use of such an architecture makes it possible in particular to be able to absorb the inertia of a large moon phase indicator 110.

[0071] The moon phase display mechanism 100 according to the invention further comprises an independent rapid correction device 300 making it possible to correct if necessary the position of the moon phase indicator 110, for example after a prolonged stop. of the 200 clock movement.

[0072] The rapid correction device 300 comprises a correction star 330 carried by the intermediate phase drive mobile 140, and integral in rotation with the phase drive pinion 142, so that an action on the star correction 330 generates a rotation of the moon phase indicator 110.

[0073] The rapid correction device 300 further comprises a phase correction control 315 which can be manipulated by a user via a pusher, or an actuation pad 316. The phase correction control 315 is pivotally mounted around an axis pivoting 5.

[0074] The phase correction control 315 cooperates with an intermediate phase correction rocker 320 pivotally mounted around a pivot axis 3. The intermediate phase correction rocker 320 comprises a correction nose 321 intended to cooperate with a tooth of the correction star 330 when requesting the phase correction command 315 by the user.

[0075] The rapid correction device 300 comprises elastic means 310 configured to reposition the phase correction control 315 and the intermediate phase correction rocker 320 in neutral rest positions when the user is not exercising any action on the phase correction command 315.

[0076] In the illustrated embodiment, the elastic means 310 rests on the intermediate phase correction rocker 320. However, the elastic means 310 can rest on the phase correction control 315.

[0077] According to an alternative embodiment, the phase correction command 315 can act directly on the phase correction star 330, so that it is possible to eliminate the intermediate phase correction flip-flop 320.

[0078] In the illustrated embodiment: – the cam is a 12 o'clock cam activating the phase rocker 130 every 12 hours, that is to say at each rotation of the hour wheel 220; – the phase wheel 112 has 105 teeth; – the phase drive pinion meshed with the phase wheel 112 has 16 teeth; – the phase drive star 141 has 18 teeth; – the correction star has 9 teeth (i.e. half as many teeth as the phase drive star 141).

[0079] Thus, the gear ratio from the hour wheel 220 is 105*9/16 = 59.0625, which corresponds to a lunation period of 29.53125 since the phase indicator 110 has two representations of the moon.

[0080] In this configuration, the moon phase indicator 110 is incremented twice per day by an angle of 3.05° so as to achieve a daily rotation of 6.1°.

[0081] In the exemplary embodiment illustrated in Figures 1 to 4, the correction star 330 advantageously has half as many teeth as the phase drive star 140, since the latter is incremented twice per day. Thus, the rapid correction device 300 makes it possible to carry out corrections equivalent to one day of training (not daily). Such a configuration advantageously makes it possible not to modify the habits of the wearer who is used to carrying out a one-day correction each time the correction command is requested.

[0082] Taking into account that the correction star 330 has 9 teeth and that the phase drive star 141 has twice as many teeth, the correction star 330 can have two different indexing positions depending on the position of the phase drive star 141 relative to its jumper 160. Thus, for the two indexing positions of the correction star 330, the distance between a tooth of the correction star 330 and the correction nose is different, and therefore the action of the correction nose of the intermediate rocker is different depending on the indexing position of the correction star 330.

[0083] Depending on the time of day when the rapid correction occurs, and therefore depending on the indexing position of the correction star 330, actuation of the correction command 315 can advance the star by correction 330 of a full daily step (here a rotation of 6.1°), each time the correction command 315 is requested, or first of a half daily step, i.e. a rotation of 3.05° (in the case two indexings per day of the phase drive star 141 and if the first indexing in the first twelve hours of the day is carried out), then a complete daily step (rotation of 6.1°) at each request of correction command 315.

[0084] The moon phase display mechanism 100 further comprises a safety device 180 making it possible to disengage the jumping drive mechanism 120 during a rapid correction by the user, via the rapid correction device 300 which acts on the same intermediate phase drive mobile 140. The safety device 180 makes it possible to disengage the jumping drive mechanism 120 when a rapid correction action occurs simultaneously with the drive of the moon phase indicator 110 by the phase shifter 130.

[0085] For example, as illustrated in Figures 1 to 4, the safety device 180 is formed by a pawl provided on the phase rocker 130.

[0086] More particularly, the pawl is provided at the level of the second arm 132 so that the correction nose 134, cooperating with the intermediate phase driving mobile 140, is located at the end of an elastic strand 181 suitable for to disengage when a correction action is initiated by the user via the rapid correction device 300 causing a rotation of the intermediate phase driving mobile 140.

[0087] Thus, when the correction nose 134 is in contact with the intermediate phase driving mobile 140 and a simultaneous rapid correction action is engaged, the elasticity of the elastic strand 181 makes it possible to release the correction nose of its engagement with the phase drive star 141 and to authorize rotation of the intermediate phase drive mobile 140 without risk of breakage or degradation of the jumping drive mechanism 120.

[0088] In the exemplary embodiment described in Figures 1 to 4, the cam forming the phase drive element is coaxial with the hour wheel 220. However, other exemplary embodiments are possible.

[0089] For example, the cam forming the phase drive element can be carried by an intermediate wheel meshed directly with the hour wheel 220.

The intermediate wheel can be configured to have a ratio of 1 with the hour wheel 220 or even a ratio other than 1.

[0091] For example, by reducing the ratio between the hour wheel 220 and the intermediate wheel it is possible to increase the display resolution of the moon phase indicator 110 over a day as described previously, this is that is to say, increasing the number of increments of the moon phase indicator 110 while reducing the angular jump of each increment to respect the overall rotation over a day corresponding to the daily angular step corresponding to the lunation period of the mechanism d 100 moon phase display.

[0092] For example with a ratio of 0.5 between the hour wheel 220 and the intermediate wheel carrying the cam, the intermediate wheel completes one revolution in 6 hours, or two revolutions in 12 hours. Thus, with a cam having a single driving finger, it is possible to divide the daily angular step of the moon phase indicator 110 into four increments distributed throughout the day, i.e. every 6 hours.

[0093] With this same ratio of 0.5 between the hour wheel 220 and the intermediate phase drive wheel and with a cam carrying two drive fingers opposite at 180°, it is then possible to split the angular step daily of the moon phase indicator 110 in eight increments distributed throughout the day, i.e. every 3 hours.

[0094] Of course, whatever the embodiment chosen, the gear ratios between the phase wheel 112, the phase drive pinion 142, and the phase drive star 141 will be adapted to divide the overall daily rotation of the moon phase indicator 110 corresponding to the daily step according to the number of desired increments.

[0095] Of course, it is also possible to use one or more intermediate references between the hour wheel 23 and the phase drive wheel 110 depending on needs.

[0096] According to another exemplary embodiment, the phase driving element can be formed by several superimposed cams interacting in phase rockers positioned on different levels of the mechanism, in order to multiply the increments of the phase indicator of moon 110 in a day.

[0097] The invention also relates to a clock movement 200 comprising a moon phase display mechanism 100 according to the invention.

[0098] The invention also relates to a timepiece, such as a wristwatch, comprising a timepiece movement 200 according to the invention.

Claims (15)

1. Moon phase display mechanism (100) for a timepiece capable of being driven by a clock movement (200) whose operation depends on the division of time, said moon phase display mechanism (200) comprising: – a moon phase indicator (110) carrying at least one representation of the moon; – a jumping drive mechanism (120) for the moon phase indicator (110) adapted to be driven by said clockwork movement (100) and to jump drive the moon phase indicator (110); the moon phase display mechanism (100) being characterized in that the jumping drive mechanism (120) is configured to rotate said moon phase indicator (110) by n increments per day, n being greater to 1, each increment causing the moon phase indicator (110) to rotate by an angle α corresponding to the angle of rotation of a daily step divided by the number n of increments. the jumping drive mechanism (120) comprising: – a cam (121) comprising a high zone forming a drive finger (124), said cam (121) being capable of being driven by the clockwork movement (200); – a phase rocker (130) pivotally mounted around a pivot axis (2), said phase rocker (130) comprising at one of its ends a feeler (132) sensing the movements of the cam (121) and comprising at the other of its ends a correction nozzle (134) animating said moon phase indicator (110) at each passage of the upper zone of the cam (121); the cam (121) being rotated so as to perform a complete rotation in 12 hours and in that the cam has two upper zones opposite at 180° forming two drive fingers (124) configured to rotate the phase rocker ( 130) and train said moon phase indicator (110) four times a day; said moon phase display mechanism (100) being configured to achieve a lunation period of 29.53125 days and in that the moon phase indicator (110) is incremented four times per day by an angle of 1.525° so as to achieve a daily rotation of 6.1°. 2. Moon phase display mechanism (100) for a timepiece according to claim 1, characterized in that the jumping drive mechanism (120) comprises an intermediate phase drive mobile (140) driven in rotation by the phase rocker (130), said intermediate phase drive mobile (140) meshing with the moon phase indicator (110). 3. Moon phase display mechanism (100) for a timepiece according to claim 2, characterized in that said intermediate phase drive mobile (140) comprises a phase drive star (141) configured to be rotated by the phase rocker (130), and a phase drive pinion (142) integral in rotation with the phase drive star (141), said phase drive pinion (142) ) being meshed with a phase wheel (112) which comprises the moon phase indicator (110). 4. Moon phase display mechanism (100) for a timepiece according to one of claims 1 to 3, characterized in that the jumping drive mechanism (120) comprises a jumper (160) cooperating with the intermediate phase drive mobile (140) to index and maintain the position of said intermediate phase drive mobile (140) between each increment. 5. Moon phase display mechanism (100) for a timepiece according to one of claims 2 to 3, characterized in that said moon phase display mechanism (100) comprises a rapid correction device (300) activatable by the user to correct the position of the moon phase indicator (110). 6. Moon phase display mechanism (100) for a timepiece according to claim 5, characterized in that said rapid correction device (300) comprises a correction star (330) carried by the intermediate mobile of phase drive (140) and configured to be driven by a phase correction command (315). 7. Moon phase display mechanism (100) for a timepiece according to claim 3, characterized in that said phase wheel (112) has 109 teeth, the phase drive pinion (142) has 16 teeth and in that the phase drive star (141) has 18 teeth. 8. Moon phase display mechanism (100) for a timepiece according to claims 6 and 7, characterized in that said correction star (330) has 9 teeth. 9. Moon phase display mechanism (100) for a timepiece according to one of claims 5 to 8, characterized in that the moon phase display mechanism (100) comprises a safety device ( 180) to disengage the jumping drive mechanism (120) when a rapid correction action via said rapid correction device (300) occurs simultaneously with the driving of the moon phase indicator (110) by the mechanism jumping training (120). 10. Clock movement (200) comprising a moon phase display mechanism (100) according to one of claims 1 to 9. 11. Clock movement (200) according to claim 10 characterized in that it comprises a timer mobile (210), an hour wheel (220), and a minute center pinion (230), said mechanism d moon phase display (100) comprising a cam (121) comprising a high zone forming a drive finger (124), said cam (121) being driven by the rotation of the hour wheel (220). 12. Clock movement (200) according to claim 11 characterized in that the cam (121) is positioned coaxially with the hour wheel (220) and mounted freely in rotation relative to the hour wheel (220). 13. Clock movement (200) according to claim 12 characterized in that the cam (121) comprises an indexing element (125) extending in the direction of the hour wheel (220) and in that the wheel hours (220) has a light (221) configured to receive the indexing element (125), said light (221) forming stops limiting the relative rotation of the cam (121) with respect to the wheel hours (220). 14. Timepiece comprising a moon phase display mechanism (100) according to one of claims 1 to 9 or comprising a timepiece movement (200) according to one of claims 10 to 13. 15. Timepiece according to the preceding claim characterized in that said timepiece is a wristwatch.