Clockwork comprising a mechanism for displaying the periods of an annual cycle animated by jumps by a 31 position mobile

Abstract

One aspect of the invention relates to a timepiece movement (1) comprising: a date mechanism (50) comprising a drive wheel set (55) with 31 stable positions actuated in steps of one step per day by a time train (10); a mechanism for displaying the periods of an annual cycle (100) driven by jumps by the drive wheel set (55), said mechanism for displaying the periods of an annual cycle (100) comprising an indicator member for the periods of an annual cycle (110) and an annual cycle train (120) driven directly by the drive wheel set (55) and configured to rotate the indicator member for the periods of an annual cycle (110); the annual cycle gear train (120) comprising an annual cycle drive wheel (123) kinematically coupled in rotation with an annual cycle correction wheel (124), the annual cycle correction wheel (124) being meshed with the member indicating the periods of an annual cycle (110);an annual cycle correction mechanism (400) configured to correct the annual cycle period display mechanism (100) by rotating a winding stem (410) rotating the annual cycle correction wheel (124) and changing the indexing between the annual cycle drive wheel (123) and the annual cycle correction wheel (124).;

Description

Technical field of the invention

[0001] The field of the invention relates to mechanisms for displaying the periods of an annual cycle, for example the seasons, of a timepiece, animated in a jumping manner by a drive wheel having 31 stable positions.

[0002] The invention also relates to a correction mechanism for a mechanism for displaying the periods of an annual cycle.

[0003] The invention also relates to a watch movement comprising a mechanism for displaying the periods of an annual cycle and a date mechanism.

[0004] The invention also relates to a timepiece, for example a wristwatch. Technological background

[0005] The display mechanisms of an annual cycle, and in particular of the periods of this annual cycle, make it possible to display information relating to a given period during an annual solar cycle.

[0006] The mechanisms for displaying periods of an annual cycle are generally mechanisms with a jumping drive allowing an indicator to correspond to a graduation or division of a dial. An annual cycle can be divided into a certain number of periods corresponding to the graduations or divisions of the dial. However, these jumping-type mechanisms for displaying periods of an annual cycle are not very precise because they do not allow the user to be told whether the displayed period of the annual cycle is at the beginning or the end.

[0007] For example, when such a mechanism for displaying periods of an annual cycle allows the months, or for example the seasons, to be indicated, the hand indicates the current period (months or seasons) without however displaying more precise information on the remaining duration of the current period. Consequently, the jump training of these displays generates a "display error" compared to the actual state of the current period.

[0008] To overcome this drawback, document EP 0397028 proposed a mechanism for displaying an annual cycle driven by a drive wheel and pinion having a 31-tooth wheel directly engaged with a date wheel. With a suitable gear ratio, the annual cycle display makes one revolution for every 372 steps of the drive wheel and pinion. In other words, the display of the periods of an annual cycle makes one revolution for every twelve complete revolutions of the drive wheel and pinion, the drive wheel and pinion, engaged with the date, makes one complete revolution per month.

[0009] Thus, with such a display mechanism, it was possible to improve the display accuracy of such a jumping drive by driving the annual cycle display once a day instead of once per period.

[0010] However, such a mechanism for displaying an annual cycle driven by a date takes a long time to adjust because it involves having to make a maximum of 372 date corrections manually, which is considered to be an unergonomic adjustment and gives the user the feeling of a less than prestigious timepiece.

[0011] Therefore, there is a need to improve this type of mechanism for displaying the periods of a jumping annual cycle driven by a mobile with 31 stable positions of a date, and in particular the correction mechanisms of such a display mechanism to address at least one of the problems mentioned above. Summary of the invention

[0012] In this context, the invention proposes a clockwork movement comprising a mechanism for displaying the periods of an annual cycle driven in jumps by a drive wheel having 31 stable positions and being actuated step by step each day, and comprising a rapid correction mechanism making it possible to independently correct the display of the annual cycle via a position pulled from the winding stem of the clockwork movement.

[0013] The mechanism for displaying periods of an annual cycle driven by jumps also features an improved display resolution that is easily adjustable by the user.

[0014] The invention relates more particularly to a clockwork movement comprising: a winding stem capable of taking at least two pulled-out positions relative to a pushed-in neutral position; a date mechanism comprising a drive wheel set with 31 stable positions actuated in steps of one step per day by a time train, the drive wheel set with 31 stable positions driving a date indicator; a mechanism for displaying the periods of an annual cycle driven in jumps by the drive wheel set with 31 stable positions, said mechanism for displaying the periods of an annual cycle comprising an indicator member for the periods of an annual cycle and an annual cycle train driven directly by the drive wheel set with 31 stable positions and configured to rotate the indicator member for the periods of an annual cycle at each step of the drive wheel set with 31 stable positions;the annual cycle train comprising an annual cycle drive wheel kinematically coupled in rotation with an annual cycle correction wheel, the annual cycle correction wheel being meshed with the indicator member of the periods of an annual cycle; an annual cycle correction mechanism configured to quickly and independently correct the mechanism for displaying the periods of an annual cycle by rotating the winding stem into a first pulled-out position; the correction mechanism being configured so that the rotation of the winding stem rotates the annual cycle correction wheel and modifies the indexing between the annual cycle drive wheel and the annual cycle correction wheel by going beyond the existing coupling between the annual cycle drive wheel and the annual cycle correction wheel.

[0015] According to the invention, the mechanism for displaying the periods of an annual cycle may be a mechanism for displaying months, weeks, constellations, signs of the zodiac, an equation of time, a running equation of time, Christian festivals, equinoxes and solstices, climatic seasons, the inclination of the earth relative to the sun, Chinese seasons or even solar periods.

[0016] Preferably, the mechanism for displaying the periods of an annual cycle is a mechanism for displaying solar periods.

[0017] Preferably, the mechanism for displaying the periods of an annual cycle is a mechanism for displaying Chinese seasons.

[0018] In addition to the characteristics mentioned in the preceding paragraph, the clockwork movement according to the invention may have one or more additional characteristics among the following, considered individually or according to all technically possible combinations: the annual cycle drive wheel is kinematically coupled in rotation with the annual cycle correction wheel by means of a correction star cooperating with a correction jumper configured to ensure that the correction star is held in a stable position during normal operation of the clockwork movement; the correction star is integral in rotation with the annual cycle correction wheel and the correction jumper is carried by the annual cycle drive wheel or in that the correction star is integral in rotation with the annual cycle drive wheel and the correction jumper is carried by the annual cycle correction wheel; the correction star has 6 branches;the correction of the annual cycle period indicator organ by the winding stem modifies the indexing between the annual cycle drive wheel and the annual cycle correction wheel by jumps, so that the annual cycle period indicator organ is corrected by jumps of 30°; the gear ratio of the resulting annual cycle gear train between the drive wheel set with 31 stable positions and the annual cycle period indicator organ is 12, so that the annual cycle period indicator organ makes a complete revolution after twelve complete revolutions of the 31 stable position drive wheel set; the annual cycle period display mechanism is a season display mechanism, preferably the Chinese seasons; the annual cycle period indicator organ comprises an annual cycle display wheel carrying an annual cycle period indicator;the annual cycle display wheel being meshed with the annual cycle correction wheel; the date mechanism comprises a 24-hour wheel driven by the time train, said 24-hour wheel comprising a finger configured to drive once a day a date lever actuating the drive wheel set to 31 stable positions by one step; the timepiece movement comprises a date correction member configured to act on said date lever and to actuate the drive wheel set to 31 stable positions by one step each time the date correction member is activated.

[0019] The invention also relates to a timepiece comprising a timepiece movement according to the invention.

[0020] Advantageously, the timepiece is a wristwatch. Brief description of the figures

[0021] The aims, advantages and characteristics of the present invention will appear on reading the detailed description below with reference to the following figures: there Figure 1 schematically illustrates a top view of a watch movement according to the invention comprising a date mechanism and a mechanism for displaying the periods of an annual cycle driven in a jumping manner by a drive wheel set at 31 positions of the date mechanism; Figure 2 schematically illustrates a bottom view of the clockwork movement shown in Figure 1 ; there Figure 3 illustrates a block diagram of the clock movement 1 according to the invention; Figure 4 is a schematic representation of a timepiece comprising the timepiece movement according to the invention.

[0022] In all figures, common elements bear the same reference numbers unless otherwise specified. Detailed description of the invention

[0023] There Figure 1 schematically illustrates a top view of a clockwork movement 1 according to the invention comprising a date mechanism 50 and a mechanism for displaying the periods of an annual cycle 100 driven in a jumping manner by a 31-position drive wheel set 55 of the date mechanism 50.

[0024] There Figure 2 schematically illustrates a bottom view of the clockwork movement 1 shown in Figure 1 .

[0025] There Figure 3 is a block diagram of the clock movement 1 according to the invention.

[0026] There Figure 4 schematically illustrates a timepiece 200 comprising a case 210 in which the timepiece movement 1 according to the invention is housed. The timepiece 200 is for example a wristwatch.

[0027] The clockwork movement 1 conventionally comprises a time train 10, partially represented, notably presenting a timer wheel driving an hour wheel, the entire time train being configured so that the hour wheel makes a complete revolution in 12 hours.

[0028] The hour wheel typically carries an hour indicator, for example an hour hand 2 (visible on the Figure 4 ) driven onto the hour wheel shaft.

[0029] The clockwork movement 1 according to the invention comprises a date mechanism 50 kinematically linked to the time train 10.

[0030] The date mechanism 50 classically comprises a 24-hour wheel 52 kinematically linked to the hour wheel of the time train 10, for example via an intermediate wheel 51 as illustrated in the figures 1 And 2 .

[0031] The 24-hour wheel 52 carries a finger 53 configured to cooperate with a date lever 54 and to animate it once a day, with each revolution of the 24-hour wheel 52.

[0032] The date lever 54 comprises a first arm 54a and a second arm 54b extending on either side of a pivot axis P1. The date lever 54 is subjected to the action of a spring (not shown) tending to position the first arm 54a in the direction of the finger 53.

[0033] The end of the second arm 54b comprises a rocker head 54c ending in a rocker beak 54d configured to cooperate with the teeth of the 31-position drive wheel set 55 of the date mechanism 50.

[0034] Thus, once a day, finger 53 drives date lever 54 by coming into contact with the end of first arm 54a. Under the pressure of finger 53, date lever 54 pivots around its pivot axis P1 so as to bring lever beak 54d into contact with the teeth of the 31-position drive wheel set 55 and to drive it in rotation, by one step.

[0035] At each step, the 31-position drive wheel set 55 is held in a stable position by a date jumper 56 and a date jumper spring (not shown) configured to push the date jumper 56 towards the teeth of the 31-position drive wheel set 55.

[0036] The 31-position drive wheel 55 is meshed with a date train 150 comprising, for example, an intermediate wheel 151 and a date display wheel 152 having an arbor 153 capable of receiving, for example, a date hand 3 forming a date indicator (visible on the Figure 4 ). The date indicator 3 can also take other forms.

[0037] The date mechanism 50 also comprises a date correction member 250, for example a pusher, acting on a correction lever 251 comprising at one end a correction beak 252 configured to set the date lever 54 in motion each time the date correction member 250 is pressed. More particularly, the correction beak 252 bears on the lever head 54c so as to actuate the 31-position drive wheel set 55 by one step via the lever beak 54d which acts on the teeth of the 31-position drive wheel set 55. Thus, each time the date correction member 250 is pressed, the 31-position drive wheel set 55 can be corrected by one step and therefore the date hand 3 by one step.

[0038] The clockwork movement 1 also includes a mechanism for displaying the periods of an annual cycle 100 driven by jumps by the date mechanism 50, and more particularly by the 31-position drive wheel set 55 of the date mechanism 50.

[0039] The mechanism for displaying the periods of an annual cycle 100 can be a mechanism for displaying months, weeks, constellations, signs of the zodiac, an equation of time, a marching equation of time, Christian festivals, equinoxes and solstices, climatic seasons, the inclination of the earth relative to the sun, Chinese seasons or even solar periods.

[0040] Preferably, the mechanism for displaying the periods of an annual cycle 100 is a mechanism for displaying months, seasons or even Chinese seasons.

[0041] The mechanism for displaying the periods of an annual cycle 100 comprises an indicator member for the periods of an annual cycle 110.

[0042] In the illustrated representation example, the indicator member for the periods of an annual cycle 110 comprises an annual cycle display wheel 112 (visible more particularly on the Figure 2 ) having a shaft 113 capable of receiving, for example, a needle 4 forming an indicator of the periods of an annual cycle (visible on the Figure 4 ).

[0043] According to an alternative embodiment, the annual cycle display wheel 112 can rotate a disc having on its upper face indications, indexes, or graduations in accordance with the periods of the annual cycle to be displayed.

[0044] Depending on the type of display desired, the disc may be visible in full, or in part, through an opening of suitable shape and provided in a dial of the timepiece 200.

[0045] In normal operation of the clockwork movement 1, the organ indicating the periods of an annual cycle 110 is driven by an annual cycle train 120 driven directly by the 31-position drive wheel set 55.

[0046] In the example shown, the 31-position drive wheel 55 meshes with a wheel 121a of a first intermediate wheel 121. The first intermediate wheel 121 comprises a pinion 121b which meshes with a wheel 122a of a second intermediate wheel 122. The second intermediate wheel 122 comprises a pinion 122b which meshes with an annual cycle drive wheel 123.

[0047] The annual cycle drive wheel 123 is kinematically coupled in rotation with an annual cycle correction wheel 124, coaxial with the annual cycle drive wheel 123, and which meshes with the annual cycle display wheel 112 carrying the indicator of the periods of an annual cycle 4.

[0048] According to the invention, the annual cycle drive wheel 123 is coupled in rotation with the annual cycle correction wheel 124 by a correction star 162 positioned between the two wheels 123, 124. The correction star 162 cooperates with a correction jumper 163 associated with its spring (not shown), the correction jumper 163 being configured to ensure that the correction star 162 is held in a stable position, in normal operating mode of the clockwork movement 1. The correction star 162 and the correction jumper 163 therefore form a coupling device whose indexing between the two wheels 123, 124 can be modified by an annual cycle correction mechanism 400 which will be described later.

[0049] According to the embodiment shown, the correction star 162 is integral in rotation with the annual cycle correction wheel 124 and the correction jumper 163 is carried by the annual cycle drive wheel 123 by means, for example, of a pin 164. Of course, the correction jumper 163 is movable in rotation around this pin 164 which forms a pivot axis of the correction jumper 163, to be able to cooperate with the different branches of the correction star 162.

[0050] According to an alternative embodiment, the correction jumper 163 is a spring jumper, movable in flexion, configured to allow a modification of the indexing between the annual cycle drive wheel 123 and the annual cycle correction wheel 124 while ensuring that the correction star 162 is maintained in a stable position, in normal operating mode of the clockwork movement 1.

[0051] In an alternative embodiment, the correction star 162 may be secured to the annual cycle display wheel 123 and the correction jumper 163 may be carried by the annual cycle correction wheel 124.

[0052] Thus, during normal operation of the clockwork movement 1, the rotation of the annual cycle drive wheel 123, driven by the rotation of the 31-position drive wheel set 55, drives the rotation of the annual cycle correction wheel 124 which is coupled in rotation with the annual cycle drive wheel 123. The annual cycle correction wheel 124 in turn drives the annual cycle display wheel 112 carrying the indicator of the periods of an annual cycle 4.

[0053] Preferably, the gear ratio of the annual cycle train 120 resulting between the 31-position drive wheel set 55 and the member indicating the periods of an annual cycle 110 is 12, that is to say that the member indicating the periods of an annual cycle 110 will make a complete revolution after 12 months and therefore 372 jumps of the 31-position drive wheel set 55 and the date hand 3 (i.e. 12x31 jumps).

[0054] Thus, according to the example shown, the indicator of the periods of an annual cycle 4 is driven each day by the driving mobile to 31 positions 55, with jumps of 0.9677° per day.

[0055] The clockwork movement 1 also comprises an annual cycle correction mechanism 400 allowing the correction of the angular position of the annual cycle display wheel 112, independently of the date, by rotation of a winding stem 410, around its axis of revolution, in a given axial position of the winding stem 410.

[0056] Conventionally, the winding stem 410 is axially movable along its axis of revolution, between different axial positions corresponding to different functions of the watch movement 1, such as for example manual winding of the movement, setting the time, setting the date and / or setting other indicators.

[0057] For example, the winding stem 410 has a first axial position T1 which is a depressed neutral position corresponding to the winding position of the timepiece movement 1, allowing the barrel spring to be wound. In this first axial position T1, the winding stem 410 is completely pushed towards the case 210 of the timepiece 200.

[0058] For example, the winding stem 410 has a second axial position T2 which is a first position pulled out relative to the neutral pressed position and which corresponds to an adjustment position of the annual cycle display wheel 112.

[0059] For example, the winding stem 410 has a third axial position T3 which is a second position pulled out relative to the neutral pressed position and which corresponds to an adjustment position of the clockwork movement 1, for example a time setting position.

[0060] To reach the second axial position T2, the user pulls axially on the crown of the winding stem 410, from the neutral position T1, to move it axially towards the outside of the case 210 of the timepiece 200.

[0061] To reach the third axial position T3, the user pulls axially on the crown of the winding stem 410, from the second axial position T2, to move it axially towards the outside of the case 210 of the timepiece 200.

[0062] On the Figure 1 , the position of the crown of the winding stem 410 in the different axial positions T1, T2, T3 of the winding stem 410 is schematically represented.

[0063] Of course, the winding stem 410 can have other pulled-out positions depending on the needs and complications of the watch movement 1.

[0064] In this second axial position T2, the sliding pinion of the winding stem 410, having axial movements opposite to those of the winding stem 410, along the axis of revolution, is brought into engagement with a train of return wheels (not shown) configured to mesh with a corrector 415 comprising at least one actuating finger.

[0065] In the embodiment shown, the corrector 415 has 5 fingers distributed uniformly around the periphery of the corrector 415, so as to allow faster correction of the annual cycle by rotation of the winding stem 410.

[0066] The corrector 415 is configured to cooperate with the teeth of an annual cycle corrector star 416 rotationally secured to an intermediate annual cycle correction wheel 417.

[0067] The corrector 415 is mounted on a sliding mechanism, so that rotation of the winding stem 410 in a predetermined direction of rotation, for example a clockwise direction, makes it possible to position the corrector 415 in engagement with the teeth of the annual cycle corrector star 416 and to rotate the corrector 415, for example in the counterclockwise direction.

[0068] The intermediate annual cycle correction wheel 417 is meshed with the annual cycle correction wheel 124. Thus, the rotation of the winding stem 410 makes it possible to drive the annual cycle correction wheel 124 in rotation by modifying its indexing between the annual cycle drive wheel 123 by going beyond the coupling force generated by the correction jumper 163, and its spring, cooperating between two consecutive teeth of the correction star 162.

[0069] The winding stem 410 makes it possible to quickly correct the indicator of the periods of an annual cycle 110, for example by jumps corresponding to a period of one month or 31 date jumps, for example by jumps of 30° of the indicator of the periods of an annual cycle 110 when the dial has 12 indexes distributed over 360°.

[0070] The operation of the clockwork mechanism 1 is as follows: in normal operating mode of the timepiece 200, the 31-position drive wheel set 55 is driven one step per day by the time train 10 as indicated previously via the finger 53 acting on the date lever 54.

[0071] The 31-position drive wheel 55 rotates the intermediate wheel 151 and the date display wheel 152 carrying the date indicator 3 by one step per day.

[0072] The 31-position drive wheel set 55 also rotates the first intermediate wheel set 121 of the annual cycle train 120. The first intermediate wheel set 121 in turn drives the second intermediate wheel set 122 of the annual cycle train 120 which meshes with the annual cycle drive wheel 123. Without any particular action on the annual cycle correction mechanism 400 and on the winding stem 410, the annual cycle drive wheel 123 is coupled to the annual cycle correction wheel 124, so that the rotation of the annual cycle drive wheel 123 causes the rotation of the annual cycle display wheel 112 and the annual cycle indicator 4 by one step per day, or 0.9677°.

[0073] If it is necessary to correct the date indicator 3, the user uses the date correction member 250. Each action of the date correction member 250 actuates the date lever 54 so as to act on the 31-position drive wheel set 55 which is driven by one step.

[0074] If it is necessary to correct the indicator organ of the periods of an annual cycle 110, the user positions the winding stem 410 in the corresponding axial position, in the embodiment described, the second axial position T2, positioned between the winding position T1 and the time-setting position T3.

[0075] In this position of the winding stem 410, the sliding pinion of the winding stem 410 is positioned in engagement with the correction wheel of the gear train. When the user rotates the winding stem 410 in a predetermined direction of rotation, the correction wheel is driven, in turn driving a gear train until the corrector 415 is rotated.

[0076] The rotation of the corrector 415 causes the rotation of the annual cycle corrector star 416 and therefore of the intermediate annual cycle correction wheel 417 which is rotationally fixed to the annual cycle corrector star 416.

[0077] The intermediate annual cycle correction wheel 417 meshes with the annual cycle correction wheel 124.

[0078] Thus, the rotation of the annual cycle correction wheel 124 causes the rotation of the annual cycle display wheel 112 by going beyond the indexing torque formed by the cooperation of the correction star 162 and the correction jumper 163 to modify the relative position of the annual cycle correction wheel 124 with respect to the annual cycle drive wheel 123 engaged with the annual cycle gear train 120 and the 31-position drive wheel set 55.

[0079] In the embodiment shown, the correction star 162 has 6 branches and the gear ratio between the annual cycle correction wheel 124 and the annual cycle display wheel 112 is 1 / 2. Thus, the annual cycle display wheel 112 is corrected in jumps by rotating through an angle of 30°, which is equivalent to a correction of one month, or 31 steps of the 31-position drive wheel 55. This is permitted with the ratio of 1 / 2 between the annual cycle display wheel 112 and the annual cycle correction wheel 124, since each jump of the 6-branch correction star 162 corresponds to a 60° rotation of the correction star 162, and therefore of the annual cycle correction wheel 124.

[0080] Of course, the correction star 162 may have a different number of branches, the gear ratio between the annual cycle correction wheel 124 and the annual cycle display wheel 112 will have to be adapted according to the previous ratios and the number of branches of the correction star 162 so that the annual cycle display wheel 112 is corrected in 30° jumps, when the dial is divided into 12 annual cycle periods.

[0081] Other constructions are possible without departing from the context of the invention.

[0082] Thus, there are two ways of correcting the indicator organ of the periods of an annual cycle 110: either by correcting the drive wheel set to 31 positions 55 in steps via the date correction organ 250, or more quickly by rotating the winding stem 410 in a predetermined direction of rotation.

[0083] The clockwork mechanism 1 according to the invention has several advantages. Since the mechanism for displaying the periods of an annual cycle 110 is indexed to the date mechanism 50, if the date mechanism is kept up to date, for example by making the relevant corrections during short months, the display of the periods of an annual cycle will never be late and will always be indexed to the date.

[0084] Thus, such a mechanism is particularly precise in comparison with mechanisms for displaying periods of an annual cycle which are not linked to a date or a date drive wheel with 31 stable positions.

Claims

1. Clock movement (1) comprising: - a winding stem (410) capable of taking at least two pulled-out positions (T2, T3) relative to a pushed-in neutral position (T1); - a date mechanism (50) comprising a drive wheel set with 31 stable positions (55) actuated in steps of one step per day by a time train (10), the drive wheel set with 31 stable positions (55) driving a date indicator (3); - a mechanism for displaying the periods of an annual cycle (100) driven by jumps by the drive wheel set with 31 stable positions (55), said mechanism for displaying the periods of an annual cycle (100) comprising an indicator member for the periods of an annual cycle (110) and an annual cycle gear train (120) driven directly by the drive wheel set with 31 stable positions (55) and configured to rotate the indicator member for the periods of an annual cycle (110) at each step of the drive wheel set with 31 stable positions (55);the annual cycle gear train (120) comprising an annual cycle drive wheel (123) kinematically coupled in rotation with an annual cycle correction wheel (124), the annual cycle correction wheel (124) being meshed with the annual cycle period indicator member (110); - an annual cycle correction mechanism (400) configured to quickly and independently correct the annual cycle period display mechanism (100) by rotating the winding stem (410) into a first pulled-out position (T2); the correction mechanism (400) being configured so that the rotation of the winding stem (410) rotates the annual cycle correction wheel (124) and modifies the indexing between the annual cycle drive wheel (123) and annual cycle correction wheel (124) by going beyond the existing coupling between the annual cycle drive wheel (123) and annual cycle correction wheel (124).; 2. Clock movement (1) according to the preceding claim characterized in that the annual cycle drive wheel (123) is kinematically coupled in rotation with the annual cycle correction wheel (124) via a correction star (162) cooperating with a correction jumper (163) configured to ensure that the correction star (162) is kept in a stable position during normal operation of the clockwork movement (1).

3. Clockwork movement (1) according to claim 2 characterized in that the correction star (162) is rotationally fixed to the annual cycle correction wheel (124) and the correction jumper (163) is carried by the annual cycle drive wheel (123) or in that the correction star (162) is rotationally fixed to the annual cycle drive wheel (123) and the correction jumper (163) is carried by the annual cycle correction wheel (124).

4. Clock movement (1) according to one of claims 2 to 3 characterized in that the correction star (162) has 6 branches.

5. Clock movement (1) according to one of the preceding claims characterized in that the correction of the annual cycle period indicator member (110) by the winding stem (410) modifies the indexing between the annual cycle drive wheel (123) and the annual cycle correction wheel (124) in jumps, so that the annual cycle period indicator member (110) is corrected in jumps of 30°.

6. Clock movement (1) according to one of the preceding claims characterized in thatthe gear ratio of the annual cycle gear (120) resulting between the drive wheel with 31 stable positions (55) and the member indicating the periods of an annual cycle (110) is 12, so that the member indicating the periods of an annual cycle (110) makes a complete revolution after twelve complete revolutions of the drive wheel with 31 stable positions (55).

7. Clock movement (1) according to one of the preceding claims characterized in that the mechanism for displaying the periods of an annual cycle (100) is a mechanism for displaying seasons, preferably Chinese seasons.

8. Clock movement (1) according to one of the preceding claims characterized in that the annual cycle period indicator member (110) comprises an annual cycle display wheel (112) carrying an annual cycle period indicator (4); the annual cycle display wheel (112) being meshed with the annual cycle correction wheel (124).

9. Clock movement (1) according to one of the preceding claims characterized in that the date mechanism (50) comprises a 24-hour wheel (52) driven by the time train (10), said 24-hour wheel (52) comprising a finger (53) configured to drive once a day a date lever (54) actuating the drive wheel set with 31 stable positions (55) by one step.

10. Clock movement (1) according to the preceding claim characterized in that the clockwork movement (1) comprises a date correction member (250) configured to act on said date lever (54) and to actuate the drive wheel set with 31 stable positions (55) by one step each time the date correction member (250) is activated.

11. Timepiece (200) comprising a timepiece movement (1) according to one of the preceding claims.

12. Timepiece (200) according to the preceding claim characterized in thatsaid timepiece (200) is a wristwatch.

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