Bidirectional correction device and clock movement equipped with such a device

Abstract

The present invention relates to a bidirectional corrector (21) for at least two display parts of a display device, the bidirectional corrector (21) comprising a corrector set (22) and a corrector train (23), the corrector set (22) and the corrector train (23) being configured to simultaneously correct the at least two display parts of the calendar display device, independent of the force transmission mechanisms of the at least two display parts, in order to maintain synchronization between the at least two display parts of the display device during the correction phase.

Description

[Technical Field]

[0001] The present invention relates to a bidirectional correction device for a timepiece movement, which allows the correction of at least two displays of a calendar display device. [Background technology]

[0002] Unidirectional correction mechanisms have already been proposed that allow, for example, the date display to be corrected using a control element of the crown, push-piece, or corrector type. Typically, the correction mechanism includes a gear train that meshes or engages with the regulating gear train of the timepiece movement. Examples of such mechanisms are disclosed in Patent Documents 1 to 4.

[0003] A calendar module is typically utilized to accommodate multiple different watch movements while allowing for advanced calendar displays such as an annual or perpetual calendar date, along with other displays such as day of the week, week number, month, year, and / or moon phase.

[0004] However, depending on the interlocking of the calendar displays with the clock movement, it is difficult to simultaneously correct multiple displays in both directions at any given moment of the day. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] European Patent Application Publication No. 3333642 [Patent Document 2] European Patent Application Publication No. 2945024 [Patent Document 3] European Patent Application Publication No. 1043634 [Patent Document 4] Swiss Patent Application Publication No. 703451 Summary of the Invention

[0006] The object of the present invention is to propose a novel configuration of a correction device that allows bidirectional correction of at least two displays, including a date display, and that is adaptable to the complexity of date calendars such as annual, perpetual or secular calendars.

[0007] To this end, the present invention is directed to a bidirectional corrector for at least two display parts, including a date display part, of a calendar display device, the bidirectional corrector comprising a corrector set and a corrector train wheel permanently coupled to the corrector set, the corrector set and the corrector train wheel being configured to simultaneously correct the at least two display parts of the calendar display device, independently of a force transmission mechanism of the at least two display parts intended to cyclically increment the at least two display parts during the correction phase, in order to maintain synchronization between the at least two display parts of the calendar display device.

[0008] Advantageously, according to the invention, the correction system does not act on a force transmission mechanism coupled to the timepiece movement in the usual way, but has its own mechanical chain acting on the calendar display, so as to be adaptable to a wide variety of calendar display devices (including stacked calendar modules), in particular to a wide variety of calendar display complexities. This also makes it possible to avoid desynchronizing the corrected displays with each other. Furthermore, the correction device according to the invention can be advantageously incorporated into timepiece movements or calendar modules intended to be attached to different types of timepiece movements in order to display calendar values. Finally, the correction device can simultaneously increase or decrease the values ​​of at least two displays.

[0009] Therefore, the present invention is also directed to a timepiece movement, which includes a bidirectional corrector for a display device as described above, characterized in that the timepiece movement includes a force transmission mechanism including a date control finger configured to control the date wheel of the calendar display device to increment the date display by one unit every 24 hours, and the corrector set of the bidirectional corrector is configured to control the date wheel of the calendar display device independently from the force transmission mechanism so as not to interfere with the force transmission mechanism during the correction phase.

[0010] The invention may also include one or more of any of the following features, either alone or in combination.

[0011] The date control finger is elastically arranged within the force transmission mechanism so that it can retract elastically from the date wheel when the date wheel is moved by the corrector set while the date control finger is on the track of the date wheel. This arrangement ensures that corrections are not prevented between 11:00 PM and 1:00 AM each day. This feature is not essential, as corrections are rarely made during this period at night, but it is proposed as an advantageous option of the present invention, for example, to avoid desynchronization of the display and to protect other teeth that come into contact.

[0012] According to another particular variant of the calendar display device including a day of the week indicator as the other correcting indication, the force transmission mechanism can include a day of the week control finger configured to control the day of the week wheel of the calendar display device to increment at least one day of the week indicator by one unit every 24 hours, and the corrector train wheel of the bidirectional corrector is configured to control the day of the week wheel of the calendar display device independently of the force transmission mechanism so as not to interfere with the force transmission mechanism during the correcting phase.

[0013] Advantageously, according to the invention, even in this particular variant, the calendar display includes a day of the week indicator as another correcting indication, and this correcting device does not act on a force transmission mechanism connected in the usual way to the timepiece movement, but has its own mechanical chain acting on the calendar display, so as to be able to adapt to a great variety of calendar displays. Furthermore, the correcting device can increase or decrease the value of the day of the week indicator simultaneously with the value of the date indicator.

[0014] The day control finger is elastically arranged within the force transmission mechanism so that it can be elastically retracted from the day wheel when the day wheel is moved by the corrector train while the day control finger is on the track of the day wheel. This arrangement ensures that corrections are not prevented between 11pm and 1am every day. This feature is not essential, as corrections are rarely made during this period at night, as mentioned above, but is proposed as an advantageous option of the present invention.

[0015] According to a particular variant of the calendar display device including an annual, perpetual or secular date mechanism including various displays including other corrected displays, the force transmission mechanism can include a month-end control wheel configured to control the month-end wheel of the calendar display device to increment the date display by at least one additional unit depending on the number of days in the month, and the corrector train wheel of the bidirectional corrector is configured to control the month-end wheel of the calendar display device independently of the force transmission mechanism so as not to interfere with the force transmission mechanism during the correction phase.

[0016] Advantageously, according to the invention, even in this particular variant in which the calendar display comprises an annual or perpetual date display, the correction system does not act on a force transmission mechanism coupled in the usual way to the timepiece movement, but has its own mechanical chain acting on the calendar display, so as to be able to adapt to a great variety of calendar displays. Furthermore, the corrector can increase or decrease the value of the annual, perpetual or secular date display simultaneously with the value of the date display, without desynchronizing the latter.

[0017] The corrector set includes an elastic force limiting mechanism that elastically disengages the correcting operation in both directions when a predetermined torque is applied to the corrector set, preventing the corrector train wheel from driving the month-end wheel of the calendar display device while the month-end control wheel is engaged with the month-end wheel of the calendar display device. This configuration allows correction to be disengaged between midnight and 3:00 a.m. at the end of February, April, June, September, and November, preventing damage to the watch movement. This function is not essential because corrections are rarely made during this period at night (corrections would be impossible because they would encounter resistance to the correction from the month-end control wheel that is engaged with the month-end wheel of the calendar display device), but it is proposed as an advantageous option of the present invention to prevent the user from forcibly operating control members such as the crown.

[0018] The bidirectional correction device may include an engagement mechanism that allows it to be switched between a correction position in which the correction device is coupled to the correction control member for bidirectional correction of the display device and a disengaged position in which the correction device is disengaged from the control member to inhibit correction of the display device.

[0019] The corrector device can include an assembly of a cam and an elastic element, which in the disengaged position allows the corrector wheel set to be in a predetermined rest position outside the track of the date wheel. The cam is, for example, mounted on the corrector wheel set and the elastic element is mounted on a fixed part of the timepiece movement and in the disengaged position exerts a thrust force on the outer profile of the cam which can drive the corrector wheel set to its predetermined rest position.

[0020] It will therefore be appreciated that in the disengaged position the corrector wheel set is always in the same rest position and can provide, for example, an equivalent movement for both an increase in the value of the calendar display (first movement direction) and a decrease in the value of the calendar display (second movement direction opposite to the first direction).

[0021] Finally, the invention is directed to a timepiece, characterized in that it includes a timepiece movement as described above. [Brief explanation of the drawings]

[0022] Other characteristics and advantages of the invention will become apparent from the description given below, given by way of example and not of limitation, with reference to the accompanying drawings, in which:

[0023] [Figure 1] 1 is a schematic diagram of an example of a watch according to the present invention; [Figure 2] FIG. 1 is a perspective view of a calendar module including an example of a correction device according to the present invention. [Figure 3] 2, with some elements removed for a better understanding of the invention. [Figure 4] 1 is a perspective view of an example of a correction device according to the present invention; [Figure 5] FIG. 1 is a top perspective view of an end-of-month control wheel superimposed on an element of an example of a corrector train according to the present invention. [Figure 6] FIG. 1 is a bottom perspective view of an end-of-month control wheel with a resilient control finger superimposed on an element of an example of a corrector train according to the invention; [Figure 7] FIG. 1 is a bottom perspective view of an example of a corrector wheel set according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0024] In the various figures, identical or similar elements bear the same reference signs and, in some cases, are indexed, so that the description of their structure and their function will not be repeated systematically.

[0025] Throughout the following, orientations refer to the orientation of the figures. In particular, the terms "top", "bottom", "left", "right", "up", "down", "forward" and "backward" are generally understood relative to the direction of depiction of the figures. Thus, the term "horizontal" means a direction parallel to the main cross section of the plate of the clock movement, and the term "vertical" means a direction perpendicular to the horizontal direction and parallel to the thickness of the plate of the clock movement.

[0026] For clarity in describing the present invention, axes (A1, A2, etc.) are arbitrarily designated herein as first axis, second axis, etc. This is a simple nomenclature for distinguishing and naming non-identical geometric elements. This nomenclature does not imply a priority of one axis over another, and such nomenclature may be readily interchanged without departing from the scope of the present disclosure. This nomenclature also does not imply an order, i.e., a third axis may be used without requiring the first and / or second axis to practice the present invention.

[0027] "Fixed part" means any element or member that is stationary relative to a given reference frame, for example relative to the calendar module or the clock movement, i.e. relative to the disc of the calendar module (or the disc of the calendar module itself) or relative to the plate of the clock movement (or the plate of the clock movement itself).

[0028] By "bidirectional corrector 21" is meant any type of device that can simultaneously correct at least two calendar indications, either increasing or decreasing their values. This device is very advantageous, since it allows the day, date and month of the display to be rapidly decreased, or vice versa, depending on the moment of correction.

[0029] According to the present invention, the bidirectional correction device 21 typically comprises an engagement mechanism (not shown) that allows it to be reversibly switched between a correction position in which the correction device 21 is coupled to the correction control member 4 for bidirectional correction of the display device 11, and a disengaged position in which the correction device 21 is disengaged from the control member 4 to prohibit correction of the display device 11.

[0030] By way of example, the engagement mechanism used in the present invention is of the mandrill-wheel-intermediate wheel type, as disclosed in chapter 3.2.7 entitled "The remontage and the mise à l'heure" in the book "Theorie d'horlogerie" by Charles-André REYMONDIN et al. (Fédération des Ecoles techniques (FET), July 2015, ISBN 2-940025-47-9) or in chapter 3.2.7 entitled "Winding and setting the hands" in the book "The theory of horology" by Charles-André REYMONDIN et al. (Fédération des Ecoles techniques (FET), July 2015, ISBN 2-940025-49-5). The nomenclature of the engagement mechanism mandrill-wheel-intermediate wheel is reproduced in this chapter 3.2.7.

[0031] The correction control member 4 may be of various types, such as a winding stem extended by the crown (which may be the same as the one for correcting the time and winding), as in the example of Figure 1, a rotating bezel, two push-buttons (one for increasing the value of the display and the other for decreasing the value of the display), or a rotating back cover.

[0032] According to the invention, "independently of the force transmission mechanism 5" means that there is no direct connection between the mechanical chain of the corrector 21 and the mechanical chain of the force transmission mechanism 5, although one and the other can each control, for example, the same date wheel 12 of the calendar display device 11.

[0033] "Clock 2" means any type of time measuring or counting device, such as a pendulum, pendulum pendulum, wristwatch, etc.

[0034] By "clock movement 3" is meant any type of mechanism that is powered and capable of counting time based on mechanical energy (e.g. barrel) or electrical energy (e.g. battery).

[0035] "Calendar module 1" means a subassembly intended to be fixed to the clock movement 3 in order to add at least one additional calendar display function to the clock movement 3. The calendar module 1 may comprise multiple components capable of displaying the date of a simple, annual, perpetual or secular calendar, together with other indications such as the day of the week, week number, month, year, day-night or am / pm indication, and / or any type of moon phase (display of the moon as seen from or for the northern or southern hemisphere), making it possible to make calendar displays from the simplest to the most sophisticated.

[0036] 1 and 2, the invention relates to a correction device 21 mounted in a calendar module 1 intended to be mounted in a clock movement 3 in a watch 2. Naturally, the correction device 21 according to the invention can be applied more generally to any clock movement 3, and not only to calendar modules 1, without departing from the scope of the invention. However, the description of the invention will be given below in the particular embodiment in which the correction device 21 is embedded in the calendar module 1.

[0037] 2 and 3, the calendar module 1 is coupled at the center of its disk 7 to an output shaft (not shown) of the clock movement 3, for example an output shaft that is preferably integral with the hour wheel. The output shaft (not shown) of the clock movement 3 is therefore permanently coupled to a force transmission mechanism 5 for driving the calendar display device 11. Naturally, the other output shaft of the clock movement 3 may or may not be centered on the disk 7 without departing from the scope of the invention.

[0038] As will be explained below, the calendar module 1 may also be coupled to an intermediate wheel of the engagement mechanism of the timepiece movement 3, so as to couple the correction of the hour hand display 17 (usually the last notch pulled out from the crown 4) with the correction of at least one of the displays 16A, 16B, 16C, 16D, and 16E of the calendar display device 11 (usually the intermediate notch pulled out from the crown 4). Alternatively or additionally, the correction of at least one of the displays 16A, 16B, 16C, 16D, and 16E of the calendar display device 11 may comprise a dedicated element attached exclusively to the calendar module 1. Indeed, within the scope of the present invention, a corrector 21 makes it possible to maintain synchronization between the different displays 16A, 16B, 16C, 16D, and 16E, while correcting only one of them risks losing this synchronization. Nevertheless, it is also possible to provide specific correctors dedicated to specific situations.

[0039] As can be seen better in the example of Fig. 1, the watch 2 comprises a calendar display device 11 including a date hand display 16A, a month hand display 16B, a year disc display 16C, a day of the week hand display 16D and a moon phase disc display 16E. In the example shown in Fig. 1, the watch 2 further comprises an hour hand display 17 (hours and minutes) normally attached to the watch movement 3. Naturally, other types of display may be provided than those mentioned above, such as a cylinder, a sphere, a strip, a ring, one or more hands each of which is a pointer, or one or more discs in linear, continuous, discontinuous, intermittent or retrograde operating mode with semi-instantaneous or instantaneous jumps, and / or in combination with these types of display listed without departing from the scope of the invention.

[0040] In the example shown in FIGS. 2 to 6, the force transmission mechanism 5 mainly comprises a reduction mechanism 8, a gear train 9, a date control finger 6A, a day-of-the-week control finger 6B, and a month-end control wheel 6C. The reduction mechanism 8 is formed by the internal teeth 8A of the month-end control wheel 6C, which forms an external sun gear permanently coupled to three planetary gears 8B pivotally mounted on the disc 7. Preferably, the three planetary gears 8B are permanently coupled to a pinion forming a central sun gear of the output shaft (not shown) of the timepiece movement 3, which is fixed to the hour hand wheel. The reduction mechanism 8 therefore makes it possible to rotate the month-end control wheel 6C every 24 hours around a first axis A1 at the center of the disc 7 of the calendar module 1.

[0041] The month-end control wheel 6C is therefore a mechanical element that distributes the forces received from the timepiece movement 3 to the rest of the force transmission mechanism 5. Typically, in the example shown in Figures 2, 4 and 6, the date control finger 6A is formed on a disk of a wheel 9A of the gear train 9 that is fixed to move together with the month-end control wheel 6C. As can be better seen in Figures 4 and 6, the wheels 9A and 6C are stacked on top of each other. The date control finger 6A is intended to temporarily couple once a day with the date wheel 12 of the calendar display device 11 in order to increment the date display 16A by one unit every 24 hours during normal operation of the timepiece, depending on its angle of rotation relative to the first axis A1.

[0042] As can be seen better in the example of Fig. 4, the date control finger 6A is elastically arranged on the wheel 9A in the force transmission mechanism 5 so that it can retract elastically towards the first axis A1 when subjected to a stress greater than a predetermined value. The date control finger 6A thus comprises a body 6A1, which is arranged in the wheel 9A by means of two flexible winding stems 6A2, which are substantially radially oriented and substantially perpendicular on either side of the body 6A1. In the rest position, the date control finger 6A protrudes from the periphery of the wheel 9A and can retract elastically towards the first axis A1 (by deformation of the winding stems 6A2) when subjected to a stress greater than a predetermined value (greater than the stress required to drive the date wheel 12 during normal operation). Preferably, the finger 6A (and therefore the body 6A1), the flexible winding stem 6A2 and the wheel 9A are made as a single piece, obtained by adding material (three-dimensional printing, growing in a mold, etc.) or by removing material (mechanical machining, chemical etching, etc.).

[0043] In the example shown in Figure 3, the month-end control wheel 6c is temporarily coupled to the month-end wheel 13 of the calendar display device 11 at the end of February, April, June, September and November depending on the angle of rotation relative to the first axis A1, and comprises a peripheral toothing intended to selectively increment the date display section 16A by at least one additional unit depending on the number of days in the month.

[0044] 2 to 6, the date display 16A is of the permanent type, i.e. it is changed by two units at the end of April, June, September and November, but by four or three units at the end of February, depending on whether the current year is a leap year or not. It can therefore be seen why the calendar display device 11 can also manage the movement of the month display 16B and the year display 16C by coupling the date wheel 12 to a dedicated gear train, which is based on the 360° rotation of the date wheel 12 each month and uses a reduction gear train or parameterized gear train known per se, and will not be described in further detail.

[0045] In the example shown in FIGS. 2-4, the day-of-week control finger 6B, like the date control finger 6A, is formed on the disc of wheel 9B of the gear train 9. Wheel 9B is permanently coupled to the month-end control wheel 6C by means of an intermediate wheel 9C. The day-of-week control finger 6B is intended to be temporarily coupled once a day with the day-of-week indicator 10 (a seven-tooth star wheel in the example of FIGS. 3-4) of the calendar display device 11 in order to increment the day-of-week indicator 16D by one unit every 24 hours, depending on its angle of rotation about the second axis A2. It can also be seen that the gear train 9 extends behind wheel 9B to drive the moon phase indicator 16E at reduced speed relative to wheel 9B. It can therefore be seen why the calendar display device 11 can also manage the movement of the moon phase indicator 16E by coupling wheel 9B to a dedicated gear train, which, based on the 360° rotation of the daily wheel 9B, uses a reduction gear train, a parameterized gear train, known per se, and will not be described in further detail.

[0046] 3 and 4, like the date control finger 6A, the day control finger 6B is elastically arranged on the wheel 9B in the force transmission mechanism 5 so that it can be elastically retracted towards the second axis A2 when it is subjected to a stress greater than a predetermined value. The day control finger 6B therefore comprises a body 6B1 which is arranged in the wheel 9B by means of four substantially radially oriented, substantially perpendicular flexible winding stems 6B2 on either side of the body 6B1. In the rest position, the day control finger 6B protrudes from the periphery of the wheel 9B and can be elastically retracted towards the second axis A2 (by deformation of the winding stems 6B2) when it is subjected to a stress greater than a predetermined value (greater than the stress required to drive the date star 10 during normal operation). Preferably, the fingers 6B (and therefore the body 6B1), the flexible winding stem 6B2, and the wheel 9B are made as a single part obtained by adding material (three-dimensional printing, growing in a mold, etc.) or by removing material (mechanical machining, chemical etching, etc.).

[0047] Advantageously, according to the invention, the calendar module 1 includes a bidirectional corrector 21 for at least two of the display sections 16A, 16B, 16C, 16D, 16E of the display section 11, including the date display section 16A. As can be seen from the examples of Figures 4 and 7, the bidirectional corrector 21 includes at least one corrector set 22 configured to control the date wheel 12 of the calendar display section 11 independently from the force transmission mechanism 5 so as not to interfere with the force transmission mechanism 5 during the correction phase.

[0048] In the example shown in FIGS. 4 and 7 , the corrector set 22 includes a corrector finger 22A formed on a first level of the corrector set 22, and the corrector finger 22A is intended to be temporarily coupled to the date wheel 12 of the calendar display device 11 every 360° in order to correct the date display portion 16A both increments and decrements according to its rotation angle relative to the third axis A3, without affecting the indexing of the force transmission mechanism 5 relative to the calendar display device 11.

[0049] Indeed, advantageously, according to the invention, the correction system 21 does not act on a force transmission mechanism 5 coupled to the watch movement 3, as is usually the case, but has its own mechanical chain acting on the calendar display device 11, in order to be able to adapt to a great variety of calendar modules 1, in particular to a great variety of calendar display complexities. Furthermore, the same calendar module 1 can be attached to different types of watch movements 3 in order to display calendar values. Finally, the correction device 21 can both increase and decrease the value of the date display 16A.

[0050] As explained above, preferably, according to the present invention, the date control finger 6A is configured elastically within the force transmission mechanism 5 so that it can be retracted elastically from the date wheel 12 when the date wheel 12 is moved by the corrector finger 22A of the corrector set 22 while the date control finger 6A is on the track of the date wheel 12. This configuration ensures that corrections are not prevented between 11pm and 1am every day. This feature is not essential, as corrections are rarely made during this period at night, but is proposed as an advantageous option of the present invention.

[0051] Furthermore, in the example shown in Figures 3 to 7, the bidirectional corrector 21 comprises a corrector train wheel 23 configured to be permanently coupled to the corrector wheel set 22, and the corrector train wheel 23 is configured to control the day indicator 10 (a seven-tooth star wheel in the example of Figures 3 and 4) of the calendar display device 11 independently from the force transmission mechanism 5 so as not to interfere with the calendar display device 11 during the correction phase.

[0052] More precisely, the corrector train 23 mainly comprises a central gear 23A and an end gear 23B connected by an intermediate wheel to a pinion 22C formed on the third level of the corrector set 22. In the example shown in Figures 3-4, there is an intermediate wheel between the pinion 22C and the central gear 23A, which is connected to the end gear 23B by another intermediate wheel. However, this configuration of the train 23 can be adapted depending on the structure of the calendar module 1 or the timepiece movement 3 without departing from the scope of the present invention.

[0053] 3-4, the end gear 23B includes a pin 23B1 formed with extra thickness, which is intended to be temporarily coupled every 360° to the day indicator 10 (a seven-tooth star wheel in the example of FIGS. 3-4) of the calendar display device 11 in order to correct the day indicator 16D to increase or decrease (at least simultaneously with the date indicator 16A) depending on the rotation angle of the end gear 23B, without affecting the indexing of the force transmission mechanism 5 relative to the calendar display device 11. Advantageously, according to the invention, the corrector 21 does not act on the force transmission mechanism 5 coupled in the usual way to the timepiece movement 3, but has its own mechanical chain acting on the calendar display device 11, so as to increase or decrease the value of the day indicator 16D and each other indicator 16E (lune) linked to it, without desynchronizing them.

[0054] As explained above, according to the present invention, the day control finger 6B is preferably configured elastically within the force transmission mechanism 5 so that it can be retracted elastically from the day wheel 10 when the day wheel 10 is moved by the corrector train 23 while the day control finger is on the track of the day wheel. Similar to the configuration of the date control finger 6A, this configuration of the day control finger 6B ensures that corrections are not prevented between 11pm and 1am each day. This feature is not essential, as corrections are rarely made during this period at night, but is proposed as an advantageous option of the present invention.

[0055] 2 to 6 includes a permanent date display 16A, the bidirectional corrector 21 controls the month-end wheel 13 of the calendar display device 11 independently of the force transmission mechanism 5, using the central wheel 23A of the corrector train 23, so as not to interfere with the calendar display mechanism 5 during the correction phase. Advantageously, according to the invention, even in this particular variant in which the calendar module 1 includes a permanent date display 16A, the corrector system 21 does not act on the force transmission mechanism 5 coupled in the usual way to the timepiece movement 3, but has its own mechanical chain acting on the calendar display device 11, so as to be adaptable to a wide variety of calendar modules 1. Furthermore, the corrector 21 can increase or decrease the values ​​of the date display 16A and the other displays 16B (month) and 16C (year) linked to the permanent date mechanism, without desynchronizing them.

[0056] According to an optional function, the corrector set 22 includes an elastic force limiting mechanism 25 that elastically disengages the correcting operation in both directions when a predetermined torque applied to the corrector set 22 exceeds, and specifically prevents the corrector train wheel 23 from driving the month-end wheel 13 of the calendar display device 11 while the month-end control wheel is engaged with the month-end wheel 13 of the calendar display device 11. This configuration allows the correction to be disengaged between midnight and 3:00 at the end of February, April, June, September, and November, thereby preventing damage to the timepiece movement 3. This function is not essential because corrections are rarely made during this period of the night (corrections would be impossible because they would encounter resistance to correction from the month-end control wheel 6C that is engaged with the month-end control wheel 13 of the calendar display device 11), but it is proposed as an advantageous option of the present invention to prevent the user from forcibly operating the control member 4, such as the crown in the example of FIG. 1 .

[0057] More precisely, in the example shown in Fig. 7, the elastic force limiting mechanism 25 comprises a groove 22D on the periphery of the fourth level of the corrector wheel set 22 and a wheel 24 cooperating with the groove 22D. The wheel 24 comprises peripheral teeth 24A intended to receive the corrective force exerted by the user on the corrector control member 4, which in the example of Fig. 1 is in the intermediate position, when the corrector device 21 is in the engaged position. The wheel 24 comprises elastic elements 24b distributed over its inner diameter, the ends of which are intended to come into contact with the grooves 22D.

[0058] In the example of Fig. 7, the elastic element 24b extends in the form of four Y-shaped sections symmetrically distributed around the third axis A3. Below a predetermined applied torque, the wheel 24 is in an elastically stable position and is fixed to rotate with the groove 22D. Above a predetermined applied torque, the wheel 24 is elastically decoupled and can no longer transmit force to the groove 22D, causing the wheel 24 to rotate around the third axis A3. Finally, as soon as the stress is released, again below the predetermined torque, the elastic element 24b returns to its elastically stable position relative to the groove 22D and again fixes the wheel 24 to rotate with the groove 22D.

[0059] Preferably, taking into account the force applied by the user to the control member 4, the elastic force limiting mechanism 25 comprises a predetermined disengagement torque that is identical for each direction of rotation about the third axis A3 and is typically between 3 and 5 Nmm, typically substantially equal to 4 Nmm (which is greater than the stress required to drive the date indicator 12, month indicator 13 and day indicator 10 in normal correction operations and greater than the stress required to elastically retract the fingers 6A, 6B). However, of course, the predetermined disengagement torque may be different depending on the direction of rotation about the third axis A3 by adapting the shape of the elastic element 24b and / or each predetermined disengagement torque may be greater than or less than 4 Nmm without departing from the scope of the present invention.

[0060] Finally, the corrector 21 can optionally include an assembly of a cam 22b and an elastic element 26, which allows the corrector set 22 to be in a predetermined rest position outside the track of the date indicator 12 when the bidirectional corrector 21 is in the disengaged position. Therefore, it is understood that when in the disengaged position, the corrector set 22 is always in the same rest position so as to provide equal movement for, for example, increasing (first movement direction) and decreasing (second movement direction opposite to the first direction) the values ​​of the calendar display portions 16A, 16B, 16C, 16D, 16E. In the example shown in FIGS. 3 and 4, the cam 22b is attached to the second level of the corrector set 22. The elastic element 26 is also attached to the fixed part (disk 7) of the calendar module 1 and exerts a thrust force on the outer profile of the cam 22b. The shape of the elastic element 26 in contact with the cam 22B and the shape of the cam 22B are determined so as to drive the corrector wheel set 22 to its predetermined rest position in the disengaged position of the bidirectional corrector device 21.

[0061] The present invention is not limited to the embodiments and variations shown, and other embodiments and variations will be apparent to those skilled in the art. The above embodiments are therefore examples. Without limitation, more complex or simpler displays may be envisioned without departing from the scope of the present invention.

[0062] Furthermore, as mentioned above, the corrector 21 is not limited to being installed in the calendar module 1. The corrector 21 is therefore generally adapted for installation in the timepiece movement 3 without departing from the scope of the present invention.

Claims

1. A bidirectional corrector (21) for at least two display sections (16A, 16B, 16C, 16D, 16E) including a date display section (16A) of a calendar display device (11), comprising a corrector set (22) and a corrector train (23) permanently coupled to the corrector set (22), wherein the corrector set (22) and the corrector train (23) are configured to correct the at least two display sections (16A, 16B, 16C, 16D, 16E) of the calendar display device (11) during a correcting phase. a bidirectional correcting device (21) configured to simultaneously correct the at least two display units (16A, 16B, 16C, 16D, 16E) of the calendar display device (11) independently of a force transmission mechanism (5) of the at least two display units (16A, 16B, 16C, 16D, 16E) intended to cyclically increment the at least two display units (16A, 16B, 16C, 16D, 16E) in order to maintain synchronization between the at least two display units (16A, 16B, 16C, 16D, 16E).

2. 10. A timepiece movement (3) including a bidirectional corrector (21) for a display device (11) according to claim 1, characterized in that the timepiece movement (3) includes a force transmission mechanism (5) including a date control finger (6A) configured to control a date wheel (12) of a calendar display device (11) to increment the date display portion (16A) by one unit every 24 hours, and the corrector wheel set (22) of the bidirectional corrector (21) is configured to control the date wheel (12) of the calendar display device (11) independently from the force transmission mechanism (5) so as not to interfere with the force transmission mechanism (5) during the correction phase.

3. 3. A timepiece movement (3) according to claim 2, wherein the date control finger (6A) is elastically configured within the force transmission mechanism (5) so that it can be elastically retracted from the date wheel (12) when the date wheel (12) is moved by the corrector set (22) while the date control finger (6A) is on the track of the date wheel (12).

4. 4. A timepiece movement (3) according to claim 2 or 3, wherein the force transmission mechanism (5) includes a day control finger (6B) configured to control the day indicator (10) of the calendar display device (11) to increment at least one day display (16D) by one unit every 24 hours, and the corrector train (23) of the bidirectional corrector (21) is configured to control the day indicator (10) of the calendar display device (11) independently from the force transmission mechanism (5) so as not to interfere with the force transmission mechanism (5) during the correction phase.

5. A timepiece movement (3) according to claim 4, wherein the day control finger (6B) is elastically configured within the force transmission mechanism (5) so that it can be elastically retracted from the day wheel (10) when the day wheel (10) is moved by the corrector train wheel (23) while the day control finger (6B) is on the track of the day wheel (10).

6. 6. A timepiece movement (3) according to any one of claims 2 to 5, wherein the force transmission mechanism (5) includes a month-end control wheel (6C) configured to control a month-end wheel (13) of the calendar display device (11) to selectively increment the date display portion (16A) by at least one additional unit depending on the number of days in the month, and the corrector train wheel (23) of the bidirectional corrector (21) is configured to control the month-end wheel (13) of the calendar display device (11) independently from the force transmission mechanism (5) so as not to interfere with the force transmission mechanism (5) during the correction phase.

7. A timepiece movement (3) according to claim 6, wherein the corrector set (22) includes an elastic force limiting mechanism (25) that elastically disengages the correcting operation in both directions when a predetermined torque applied to the corrector set (22) exceeds the predetermined torque, and the corrector train wheel (23) can be prevented from driving the month end wheel (13) of the calendar display device (11) while the month end control wheel (6C) is engaged with the month end wheel (13) of the calendar display device (11).

8. A timepiece movement (3) according to any one of claims 2 to 7, wherein the bidirectional correction device (21) comprises an engagement mechanism that enables the bidirectional correction device (21) to be switched between a correcting position in which the correction device (21) is coupled to a correction control member (4) for bidirectionally correcting the display device (11), and a disengaged position in which the correction device (21) is disengaged from the control member (4) for prohibiting correction of the display device (11).

9. A timepiece movement (3) according to claim 8, wherein the corrector (21) comprises an assembly of a cam (22B) and an elastic element (26), which assembly allows the corrector wheel set (22) to be in a predetermined rest position outside the track of the date wheel (12) in a disengaged position.

10. 10. A clock movement (3) according to claim 9, wherein the cam (22B) is mounted on the corrector set (22), and the elastic element (26) is mounted on a fixed part (7) of the clock movement (3), and in a disengaged position, exerts a thrust force on an outer profile of the cam (22B) that can drive the corrector set (22) to its predetermined rest position.

11. A timepiece (2), characterized in that it includes a timepiece movement (3) according to any one of claims 2 to 10.

Images