• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a date mechanism (100) for a timepiece, comprising: an input mobile (1) arranged to be driven by a base movement; a date wheel set (5) designed to be driven at a rate of at least one step at the end of each day; a catching mobile (7) in kinematic connection with said date mobile (5) by means of a catching gear (6), said catching mobile (7) being arranged on the one hand to be driven by said date mobile (5) at a rate of at least two steps per month, one of which during the transition between the 28th and 29th of the month, and the other during the transition between the 1st and 2nd of the month, and on the other hand to drive said date mobile (5) at the rate of a number of additional steps at the end of months having less than 31 days; a first return (2) arranged to be driven by said input mobile (1); a second gear (3) meshing with said first gear (2) and carrying a finger (3a) arranged to drive said date wheel set (5) at a rate of one step per day; a third return (4) meshing with said first return (2) and carrying a plurality of fingers (4a, 4b) arranged to drive said catch-up wheel (7) at the rate of a number of additional steps at the end of said months having less than 31 days, and this after the training of said date wheel set (5) by means of said finger (3a) carried by said second reference.
    公开号:CH717422A2
    申请号:CH00515/21
    申请日:2021-05-07
    公开日:2021-11-15
    发明作者:Cornibe Sylvain
    申请人:Richemont Int Sa；
    IPC主号:
    专利说明:

    Technical area
    The present invention relates to the field of watchmaking. It relates more particularly to a perpetual or annual calendar mechanism.
    State of the art
    [0002] Document CH704507 describes a perpetual calendar mechanism which comprises a driving wheel set in four planes, which interacts with a date programming mobile in order to drive it at a rate of one, two, three or four steps at the end of the current month. This mobile drive comprises a pinion which is driven at the rate of one revolution per day via a toothed sector carried by a mobile 24 hours, as well as four small discs each provided with a finger. These fingers are arranged to interact each with one or more teeth that has a corresponding level of the programming mobile, insofar as a tooth is in the path of the finger in question when the driving mobile rotates. To this end, the various levels of the programming mobile have fixed teeth in order to ensure training at the rate of one additional step at the end of each month with less than 31 days and one more step at the end. each month of February, as well as movable teeth to ensure further training at the rate of an additional step at the end of February in non-leap years. A control system is also provided to ensure that one of these movable teeth is in the path of the corresponding finger when the time comes at the end of the months in question.
    This mechanism is certainly interesting in terms of minimizing energy losses during training, but is relatively thick due to the stack of elements of the drive mobile as well as the programming mobile. For the rest, the implementation of the driving mobile is not easy, the angular indexing of the fingers relative to each other being difficult to master.
    [0004] The aim of the invention is therefore to provide a date mechanism in which the aforementioned defects are at least partially overcome.
    Disclosure of the invention
    More specifically, the invention relates to a date mechanism for a timepiece, as defined by claim 1. This mechanism comprises:
    - an input mobile arranged to be driven by a basic movement, for example at the rate of one revolution per day from an hour wheel;
    [0007] - a mo - a date mobile arranged to be trained at a rate of at least one step at the end of each day, typically at the rate of one revolution per month in steps of 1/31 <th> d ' a lap;
    [0008] a catch-up mobile in kinematic connection with said date mobile via a catch-up guide, said catch-up mobile being arranged on the one hand to be driven by said date mobile at a rate of five steps per month, including one at the end of the 28th of the month and the other at the end of the 1st <er> of the month, as well as possibly at the end of the 29th, and / or the 30th and / or the 31st of month, depending on the number of days in the ending month, and on the other hand to drive said date mobile at the rate of a number of additional steps at the end of months having less than 31 days, in order to catch up with the dates that do not take place;
    [0009] - a first reference arranged to be driven by said input mobile;
    [0010] a second reference meshing with said first reference and carrying a finger arranged to drive said date mobile at a rate of one step per day, in particular around midnight;
    [0011] - a third reference meshing with said first return and carrying a plurality of fingers arranged to drive said catch-up mobile at the rate of a number of additional steps at the end of said months having less than 31 days, and this, following the driving of the date mobile via the finger carried by the second reference.
    By these means, a relatively simple and particularly compact in height mechanism is proposed, the adjustment of the angular positions of the fingers of which is significantly simplified compared to the stacked arrangement mentioned in the preamble. For the rest, the use of the three references also allows the mechanism to be arranged in several spatial ways in order to minimize the complexity of the transmissions leading to display members and thus to allow the displays to be arranged on a dial with a large flexibility.
    Advantageously, said first, second and third references are located at least partially in a common plane, that is to say that we can define a plane, parallel to that of the mechanism, which intersects each of these three references .
    Advantageously, said fingers of the third reference are distributed over two levels, a first finger located on a first level and being arranged to cooperate with a 30-day month wheel that includes said catch-up mobile, so as to drive the latter (and therefore the date mobile via the catch-up reference) at the rate of one additional step at the end of the months having 30 days, as well as a pair of fingers located on a second level and being arranged to cooperate with a February 29 toothing that includes said catching wheel set, so as to drive the latter (and therefore the date wheel set by means of the catch up gear) at the rate of two additional steps at the end of February . Preferably, each of these teeth has an additional tooth arranged to allow correction of the take-up mobile in the opposite direction. To this end, the 30-day month wheel as well as the February 29 toothing each have a number of teeth positioned in an appropriate manner to cooperate with the respective fingers of the third reference.
    Advantageously, said catch-up mobile comprises at least one retractable tooth arranged to cooperate with said first finger at the end of the 28th of the non-leap months of February in order to advance said catch-up mobile (and therefore the date mobile by l 'intermediary of the catch-up reference) at the rate of one more additional step. This at least one retractable tooth is therefore preferably coplanar with those of the 30-day month wheel, and may be a pair of teeth arranged to also allow correction in the opposite direction.
    Advantageously, said at least one retractable tooth is carried by a lever pivotally mounted on said take-up mobile, and the angular position of which is controlled by at least one cam integral in rotation with a pinion pivotally mounted on said mobile take-up and which meshes with a fixed wheel mounted on a frame element. Preferably, said lever is a double lever which cooperates with a pair of coaxial cams desmodromically. This arrangement is particularly simple, and has a minimum of parts for controlling the position of the at least one retractable tooth.
    Advantageously, said input mobile comprises a toothed sector arranged to rotate said first return around midnight (that is to say during a predetermined period which includes midnight), preferably at the rate of one revolution per day. Preferably, said input mobile and said first return are arranged so as to be self-locking when said toothed sector does not mesh with said first return. No positioning jumper is therefore necessary and energy losses, typically associated with the use of a jumper, are avoided.
    [0018] Advantageously, said date mobile comprises a toothed sector arranged to pivot said catch-up mobile at the rate of one step at the end of the 28th of the month, of one step at the end of the 29th of the month, of a step at the end of the 30th of the month, a step at the end of the 31st of the month as well as a step at the end of the 1st of the month, when the month has 31 days. Said date wheel set and said take-up gear can advantageously be arranged so as to be self-locking when said toothed sector does not mesh with said take-up gear, in a manner analogous to the input mobile and the first gear.
    [0019] Advantageously, said catch-up return is designed to perform a third of a turn per month.
    This mechanism can be incorporated into a timepiece movement, said input mobile being arranged to be driven by an hour wheel that said movement comprises, preferably at the rate of one revolution per day. This movement can, of course, be used in a timepiece such as a wristwatch, pocket watch or the like.
    Brief description of the drawings
    Other details of the invention will emerge more clearly on reading the following description, made with reference to the accompanying drawings in which:Figure 1 is a plan view of a date mechanism according to the invention, showing the hidden lines;Figure 2 is an isometric view of the mechanism of Figure 1;Figure 3 shows detailed views of the cooperation between the input mobile and the downstream return of the latter, as well as said return;Figure 4 is an isometric view of the date mobile as well as the references with which it cooperates;FIG. 5 is an isometric view illustrating the cooperation between the partially toothed wheel that the date wheel set comprises and the take-up gear, when the latter is not in the process of cooperating with the partial toothing;Figure 6 is an isometric view of the catch-up mobile;Figure 7 is an exploded view of the take-up mobile;Figure 8 is an isometric view of the take-up mobile, the take-up wheel and the February 29 teeth having been removed;Figure 9 is an isometric view of the mechanism just before midnight on the 28th of a non-leap February;Figure 10 is a plan view of the situation shown in Figure 9, showing the hidden lines;FIG. 11 is a plan view of the situation a little later than that of FIG. 10, during the driving of the date wheel set, showing the hidden lines;FIG. 12 is a plan view of the situation a little later than that of FIG. 11, just after the driving of the date wheel set and on which the take-up wheel has been removed, showing the hidden lines;Figures 13 and 14 are partial plan views of the drive of the retractable tooth as well as the toothing February 29 by the fingers of the third reference;FIG. 15 is a plan view of the situation just after that of FIG. 14, the date mobile indicating the 1st of the month, showing the hidden lines;Figure 16 is a plan view of the situation just after the training of the date wheel set to indicate the 2nd of the month, the take-up wheel having been removed, showing the hidden lines;Figure 17 is a plan view of the situation just before midnight on February 28 in a leap year with the catch-up wheel removed, showing the hidden features;Figure 18 is a plan view of the situation just before midnight on February 29 of a leap year with the catch-up wheel removed, showing the hidden features;FIG. 19 is a plan view of the situation just after that of FIG. 18, after the date wheel set has been driven by the second reference, the take-up wheel having been removed, showing the hidden lines;Figure 20 is a view of the situation just before midnight on the 28th of a 30-day month, with the catch-up wheel removed, showing the hidden lines;Figure 21 is a view of the situation just after that of Figure 20, after the date wheel has been driven by the second reference, the take-up wheel having been removed, showing the hidden lines;Figure 22 is a view approximately 24 hours later than that of Figure 21, with the take-up wheel removed, showing the hidden lines;Figure 23 is a view approximately 24 hours later than that of Figure 22, with the take-up wheel removed, showing the hidden lines;Figures 24 to 27 are schematic views of various arrangements of the main elements of the mechanism; andFigures 28 to 30 illustrate examples of various arrangements of display members on the dial.
    Embodiment of the invention
    Figures 1 and 2 illustrate overall views of a date mechanism 100 according to the invention, just before midnight on a day in the middle of a month. This mechanism comprises an input mobile 1, intended to be driven at the rate of one revolution per day by means of an hours wheel of a basic watch movement, which meshes with an input wheel 1a with toothing. complete that comprises said mobile 1. The input mobile can thus directly or indirectly cause a display of the time on a 24-hour scale, if desired.
    The latter also comprises a partial toothed wheel 1b, which is coaxial with the wheel 1a and comprises a toothed sector 1f having 14 teeth on a basis of 48 teeth, of which 12 teeth are conventional teeth, the two teeth located from on either side of the series of 12 conventional teeth being interconnected over a partial height by a locking surface 1c which will be described below. It should be noted that all of the numbers of teeth mentioned in this text are cited purely by way of example, and that other numbers are also possible insofar as the operation described is ensured.
    The partial toothed wheel 1b cooperates with a first reference 2, which is rotated by the toothed sector 1f at the rate of one revolution once a day, and this for about 7.5 hours around midnight, this duration including 00h00 and can be adapted to the needs of the manufacturer. The rest of the day, the first return 2 is immobilized by a self-locking arrangement, which will be described with reference to FIG. 3.
    The non-toothed portion of the partial toothed wheel 1b comprises two surfaces 1c, 1d, in particular a locking surface 1c, which has a radius corresponding to that of the tops of the teeth of the toothed sector 1f and which follows the extension of the tops teeth 1g of the toothed sector 1f, as well as an inactive surface 1d which has a sufficiently small radius not to come into contact with the first reference 2. These surfaces are located side by side, one superimposed on the other, considered with reference to the axis of rotation of the input mobile 1.
    The first reference 2 comprises 15 teeth, including two teeth 2a, 2b are partially cut in their thickness. The uncut portions (that is to say the solid portions) 2a extend in the direction of the inactive surface 1d, and the cut portions 2b lie opposite the locking surface 1c when the non-toothed portion 1f of the partial toothed wheel 1b cooperates with the first gear 2. The locking surface 1c thus cooperates with the flanks of the teeth which are located on either side of the partially cut teeth 2a, 2b so that the first gear 2 does not cannot rotate, similar to conventional type intermittent drive self-locking gears. However, the arrangement illustrated here is particularly advantageous since the shapes of the teeth can be entirely conventional, which optimizes the transmission of torque as well as the clearances between the two elements, and the presence of the uncut parts 2a which cooperate with the peripheral teeth. 1g of the toothed sector 1f ensures the reliability of the drive when the toothed sector 1f begins to interact with the first reference 2. In fact, this arrangement prevents the meshing between these two toothings from being blocked at this time thanks to the cooperation between one of said uncut parts 2a and the toothed sector 1f which guarantees the pivoting of the first reference 2 at that time.
    Kinematically downstream of the first reference 2 are, on the one hand a second reference 3 arranged for driving a date mobile 5, and on the other hand a third reference 4 arranged to drive a catch-up wheel 7. In the construction illustrated, all of the references 2, 3 and 4 can be cut by a common plane and have the same number of teeth, for a gear ratio of 1 to 1. For the rest, an additional reference optional 9 may be present, in order to cause a display of the day of the week or the like (not shown).
    Referring to Figure 4, the second reference 3 carries a finger 3a which cooperates with a date wheel 5a with 31 teeth, which comprises said date mobile 5, and which is positioned by a jumper 10 in a known manner in order to determine 31 stable angular positions for said mobile 5. The latter may include, or may drive, a date disc, a hand or the like (not shown) which is used to indicate the date to the user. In order to simplify reading later, the phrase “the date mobile indicates ...” (and the like) has been used as an abbreviation to encompass any arrangement of date display means, whether carried by the mobile. date 5 or not, the angular position of the date mobile 5 corresponding to the indication mentioned in any case.
    When the finger 3a does not enter the teeth of the date wheel 5a, a rapid correction, by means of an ad hoc control system (not illustrated) acting on the latter, can be carried out.
    The elements described so far allow, said mechanism 100, to operate as a simple date, the date mobile 5 moving forward at a rate of one step per day and requiring manual correction at the end of each month having less than 31 days.
    In order to ensure automatic correction at the end of months of less than 31 days, the catch-up mobile 7 is driven by the third reference 4 in order to advance the date mobile 5 at the rate of a number of steps additional, by means of a catching gear 6, which also serves for indexing the catching wheel 7 and which has a number of teeth which is a multiple of five (15 in the illustrated case). For these purposes, the take-up gear 6 cooperates with a partial toothed wheel 5b that the take-up wheel 5 includes, and this in a similar way to the interaction between the first gear 2 and the partial toothed wheel 1b of the wheel set. Entrance.
    To this end, the partial toothed wheel 5b comprises a toothed sector 5c having a series of four complete teeth on a base of 31 teeth. These teeth are oriented and aligned with those of the date wheel 5a, the rest of the periphery of the partial toothed wheel 5b comprising an inactive surface 5f superimposed on a blocking surface 5d, similar to those of the wheel 1b described above. Finally, the take-up gear 6 comprises 15 teeth, six of which are pairs of adjacent teeth 6a, 6b partially cut in their thickness, distributed regularly around said gear 6 and similar to those of the first gear 2 in order to have the same operation. Consequently, at each revolution of the date wheel set, the take-up gear 6 as well as the take-up wheel 7 advance at the rate of 5 steps of their respective teeth.
    The catch-up mobile 7 will now be described in more detail, with particular reference to Figures 6 to 8.
    This mobile 7 comprises a take-up wheel 7a with 60 teeth, positioned by a jumper 11 and meshing with the take-up pinion 6. The take-up wheel 7a is integral in rotation with a 30-day month wheel 7b, which has four pairs of two teeth on a base of 60 teeth, which are angularly aligned with superimposed teeth of the take-up wheel 7a. Each pair of teeth cooperates with a first finger 4a that comprises the third reference 4 (see Figures 1 and 2). One of the teeth of each pair ensures the advancement of the date at the rate of an additional step at the end of April, June, September and November, the other tooth of each pair ensures the driving of the mobile of correction 7 in the opposite direction during a correction in the opposite direction, and the positions of the teeth are chosen for this purpose.
    To ensure a further step at the end of each month of February, whether the year is leap or not, a toothing February 29 7c is provided, integral in rotation with the take-up wheel 7a, on a level different from that of the 30-day month wheel 7b, so that said toothing 7c does not cooperate with the first finger 4a but with a pair of fingers 4b which are integral in rotation with the first finger 4a on an ad hoc level in order to cooperate exclusively with the teeth 7c. This set of teeth 7c has three teeth, two of which are involved in the normal training at the end of February, the other being involved exclusively in the case of a correction in the opposite direction.
    For the months of February of non-leap years, the additional step at the end of the 28th of the month is provided by means of a pair of retractable teeth 7d, which are located at the same level as the wheel of the months of 30 days 7b, and are thus also trained by the first finger 4a. Again, one of these teeth is involved in the normal training, the other in the case of a correction in the opposite direction.
    These retractable teeth 7d are carried by a double lever 7f, which is pivotally mounted on a frame 7g integral in rotation with the take-up wheel 7a, the angular position of said double lever 7f with reference to its own pivot axis on the frame 7g being determined by a control system 8.
    This control system 8 comprises a double cam 8a pivotally mounted on said frame 7g and arranged to act on the two arms of the double lever 7f so as to cause it to move between two extreme angular positions, one in which the retractable teeth 7d are beyond the reach of the first finger 4a, the other in which the retractable teeth 7c are in an active position and are therefore capable of cooperating with said first finger 4a. In the construction illustrated, the double cam 8a takes place between the two arms of the lever 7f and is shaped so as to control the latter desmodromically, but other arrangements are possible. For example, the double cam 8a can be replaced by a constant radius cam, or a single cam can act on an arm of the double lever 7f against the effect of a return spring which tends to maintain said arm. of the double lever 7f in contact with the cam. In the latter situation, the double lever 7f can of course be replaced by a single lever.
    The double cam 8a is integral in rotation with a pinion 8b, which meshes with a fixed wheel 8c which is mounted integral in rotation with a frame element (not illustrated) coaxial with the take-up mobile 7. In this way , when the latter pivots, the pinion 8b rolls on the teeth of the fixed wheel 8c and thus pivots relative to the frame 7g, causing the angular displacement of the double lever 7f and retracting the retractable teeth 7d when the year is leap year. In the illustrated construction, the gear ratio between pinion 8b and fixed wheel 8c is chosen so that pinion 8b performs 1.25 turns per year around its own axis of rotation. However, other variants of gear ratios are possible, since the retracted or deployed state of the retractable teeth 7d at times when they are not facing the finger 4a has no effect on the operation of the system.
    In order to simplify the mechanism 100, the control system 8 can be omitted and the retractable teeth 7c can be made fixed. In such a case, a correction will be necessary exclusively at the end of February of leap years, in order to display the 29th <th> day of the month since this will be skipped automatically. Even simpler, is a variant in which the retractable teeth 7c are absent. In this case, a manual correction at the end of February of each non-leap year is necessary in order to advance the date indication. The date mechanism 100 is thus annual instead of being perpetual in each of these variants.
    The structure of the mechanism 100, according to the invention, having been described, its operating phases will now be explained with reference to Figures 9 to 23. In order not to overload the figures, only the reference signs, mentioned in the text in the context of a particular figure, appear on the relevant figures. For the rest, the directions of rotation will be indicated with reference to the orientations of the figures.
    Figures 9 and 10 illustrate the situation just before the most complicated training, that is to say starting a little before midnight on February 28 of a non-leap year.
    In the illustrated situation, the toothed sector 1f of the input mobile 1 has just engaged with the teeth of the first reference 2, which has the effect of starting the drive of the latter in the clockwise direction. For the rest, the toothed sector 5c is about to engage with the take-up return toothing 6.
    Subsequently, the second reference 3 is driven in turn in the counterclockwise direction, and its finger 3a engages with the teeth of the date wheel 5a, as illustrated in Figure 11, which represents the situation for some time later than that shown in Figures 9 and 10, the date indication being going from 28 to 29.
    At the same time, the take-up gear 6 is rotated counterclockwise by the toothed sector 5c, which also drives the take-up wheel 7 in the clockwise direction, at a rate of one pitch of the teeth of the take-up wheel 7a.
    When this training is finished, the situation illustrated in Figure 12 arises. In this figure, the take-up wheel 7a has been removed in order to make the other elements of the take-up wheel visible.
    Since it is February 28 of a non-leap year, the control system 8 has ensured that the retractable teeth 7d carried by the double lever 7f are in their active position, that is to say that 'they are deployed. Consequently, the upstream tooth among the latter (considered in the direction of rotation of the take-up mobile 7) is in the path of the first finger 4a carried by the third reference 4.
    Subsequently, the third reference 4 continues to pivot in the counterclockwise direction, and therefore the first finger 4a drives said upstream tooth among the retractable teeth 7d (see Figure 13) at a rate of a pitch of the toothing of the take-up wheel 7a, and the two fingers 4b subsequently drive the two upstream teeth of the toothing February 29 7c (see FIG. 14) at a rate of two steps of the toothing of the take-up wheel. Since the catch-up wheel set 7 is thus pivoted at the rate of three steps, by the fingers 4a, 4b, the date wheel set 5 is also advanced at the rate of three additional steps, by means of the take-up wheel 6, which meshes, at that moment, with on the one hand the take-up wheel 7a and on the other hand the toothed sector 5c of the date mobile 5. The finger 3a being out of engagement with the date wheel 5a, the date mobile 5 is thus free to pivot in order to take these additional steps.
    The date mobile 5 thus indicates the first of the month, and the situation illustrated by FIG. 15 prevails. In the case of a correction in the opposite direction at this stage, the sequence of displacements described above will be carried out according to the reversed sequence, and it is for this reason that each of the teeth 7c, 7d has an additional tooth which was not not involved so far. This additional tooth thus becomes the upstream tooth with respect to the direction of rotation of the take-up wheel set 7 when the third gear 4 is rotated clockwise to effect such a correction.
    As clearly follows from Figure 15, a tooth of the toothed sector 5c remains engaged with the take-up gear 6 and the downstream tooth of the toothing February 29 7c remains within the reach of the fingers 4b. Consequently, during the passage from the first to the second of the month, that is to say the next regular pivoting of the date wheel set 5, the take-up wheel set 7 will be advanced at the rate of one pitch of its teeth via of the take-up gear 6, in order to ensure that there will be no interaction with the fingers 4a, 4b, the latter now being out of engagement with the teeth 7c, 7d as illustrated in FIG. 16, on which the Take-up 7a has been removed again in order to be able to view the other teeth of the take-up mobile 7 (which is also the case for FIGS. 17 to 23).
    In the situation illustrated by FIG. 16, which represents the mechanism just after the driving of the date mobile 5 by the finger 3a so that the date mobile indicates the 2nd of the month, the cooperation between the date mobile 5 and the catch-up transmission 6 is self-locking, as described above, and the catch-up mobile 7 has moved forward at the rate of 5 steps from its starting position on the 28th of the month.
    Between the 2nd and the 27th (including the limits) of each month, the catch-up reference 6 and the date mobile cooperate so that the latter remains blocked. Consequently, the catch-up mobile 7 also remains blocked, no tooth being in the path of the fingers 4a, 4b, and, around midnight each day, the date mobile 5 will be driven by the finger 3a in the usual way.
    FIG. 17 illustrates the situation a little before midnight on February 28 of a leap year. The pinion 8b of the control system 8 has rolled on the fixed wheel 8c during the rotations of the take-up mobile 7 so that the double cam 8a is now in an angular position which has caused the retraction of the retractable teeth 7d. The latter are therefore out of reach of the first finger 4a.
    Therefore, when driving the date mobile 5 to indicate 29, the only additional effect is the driving of the catching mobile 7 at the rate of one pitch of its toothing in the clockwise direction, through of the toothed sector 5c and the take-up gear 6. These elements will thus be in the positions illustrated in FIG. 18, which illustrates the situation 24 hours after FIG. 17, that is to say just before midnight on February 29.
    In this situation, the teeth 7c are still out of reach of the fingers 4b. However, after driving the date mobile 5 by one step through the finger 3a around midnight of February 29, the catch-up mobile 7 was advanced by an additional step via the reference. take-up 6, and the February 29 teeth 7c will now be within reach of the fingers 4b of the third gear 4. Consequently, during the rotation of the gear 4, the two upstream teeth among these three teeth 7c will be driven by the fingers 4b, as described in the context of FIG. 14 above, and the same consequences result therefrom so that the date mobile 5 indicates "1", and 24 hours later, "2".
    The case of a month of 30 days will now be described with reference to Figures 20 to 23.
    FIG. 20 illustrates the situation just before midnight on the 28th of a 30-day month, in particular April, the catch-up gear 6 being about to engage with the toothed sector 5c of the date mobile 5, and all teeth of the take-up mobile 7 being beyond the reach of the fingers 4a and 4b of the third gear 4.
    FIG. 21 illustrates the situation a little later, after the driving of the date wheel 5 by means of the finger 3a to indicate "29". The toothed sector 5c of the date wheel set has caused the take-up gear 6 and thus the take-up wheel 7 to pivot, at the rate of one pitch of their respective teeth, which has caused the latter to move forward. However, any toothing of the take-up mobile 7 remains out of reach of the fingers 4a, 4b, and no additional drive will therefore take place, the indication thus remaining at "29".
    FIG. 22 illustrates the situation approximately 24 hours later than FIG. 21, the date mobile 5 having been brought forward to indicate "30". The take-up gear 6 and the take-up mobile 7 have been further advanced at the rate of an additional pitch of their respective teeth, but again, all the teeth of the take-up mobile 7 remain out of reach of the fingers 4a, 4b, and the The indication remains at "30" until the next date mobile 5 is driven.
    FIG. 23 illustrates the situation approximately 24 hours later than FIG. 22, the date mobile 5 having been driven by the finger 3a to indicate "31", which also caused the catch-up wheel 7 at a rate of 'one more step. Now, a tooth of the 30-day month wheel 7b is within reach of the first finger 4a, and will thus be driven by the latter when the third idler 4 continues to pivot. Subsequently, the catching mobile 7 will drive the catching gear 6 in rotation and thus the date mobile 5 at the rate of one pitch of their teeth so that the latter indicates "1". Again, the catch-up wheel 7 is advanced an additional step during the transition between an indication of "1" and "2" in order to move the downstream tooth away from the pair of teeth of the month wheel. 30 days from the reach of the first finger 4a.
    When the user performs a correction in the opposite direction, the other tooth of each pair of teeth of the 30-day month wheel 7b becomes the upstream tooth, and cooperates with the first finger 4a in order to allow a correction going through the end of a 30-day month.
    In the case of a month of 31 days, no tooth of the catch-up mobile 7 will be within the reach of the fingers 4a, 4b towards the end of the month, and no additional steps of the date mobile 5 will therefore be generated. , the latter advancing step by step, exclusively under the control of the finger 3a at the rate of one step per day, the take-up wheel 7 also advancing under the control of the toothed sector 5c by means of the take-up gear 6.
    In the case of a rapid correction by means of a rapid correction system acting on the date mobile 5 when the fingers 3a, 4a and 4b are out of range of the teeth with which they interact, the synchronization between the date mobile 5 and the catching mobile is maintained by virtue of the catching gear 6 and its interactions with the date 5 and catching 7 mobiles.
    The calculation of the various gear ratios to obtain this operation is of course within the abilities of those skilled in the art, and the shapes and numbers of teeth can be chosen ad hoc for this purpose. The embodiment illustrated above is therefore in no way limiting.
    The mechanism 100 according to the invention not only allows the above-described operation, but also allows a correction in the opposite direction without adjustment of the various elements. For the rest, it can be arranged on a frame in various ways, in order to make the best use of the available space, and to position display members displaying information related to the date (for example the date, month, date). day of the week, leap cycle etc ...) at the will of the manufacturer by adapting a minimum of elements and without requiring cumbersome transmission kinematic chains.
    For example, a display of the day of the week can be driven directly or indirectly from the input mobile 1 or from one of the references 2, 3, 4, 9, a display of the months can be driven directly or indirectly from the take-up wheel 7a, and a leap year display can also be driven from the same wheel 7a. The details of these displays are within the abilities of those skilled in the art and therefore do not need to be described in detail here.
    Figures 24 to 27 illustrate various arrangements of the main elements of the mechanism, which are particularly suitable for certain display arrangements, such as those given by way of example in Figures 28 to 30.
    The arrangement of FIG. 24 is particularly (but not exclusively) suitable for a display of the date 21 in the center, a display of the day of the week 22 on the left and a display of the month 23 and leap years 24 on the right on the dial 20, as for example illustrated in FIG. 28, on which a 24h display has also been provided coaxially with the display of the day of the week 22. This arrangement is also suitable for the display of FIG. 29, in which the he display of the date 21 is also in the center, that of the day of the week 22 is at 8 o'clock while those of month 23 and leap year 24 are at 4 o'clock. The 24 hour 25 display is at 12 p.m. here.
    The arrangement of Figure 25, which represents that of Figure 24 inverted along a vertical axis, is particularly suitable for displays similar to those of Figures 28 and 29, the positions of the displays of days and months / leap years having been reversed.
    [0070] Figure 26, which shows the arrangement of Figure 24 inverted along a horizontal axis, also suitable for a display according to Figure 28, according to Figure 30 (which is similar to that of Figure 28 except that the date display 21 is at 12 o'clock) or according to a variant of that of FIG. 29 in which the displays at 4 o'clock and at 8 o'clock have been exchanged for each other.
    Finally, FIG. 27, which represents the arrangement of FIG. 26 inverted along a vertical axis, is particularly suitable for a variant of a display according to FIG. 28 in which the displays at 3 o'clock and at 9 o'clock have been exchanged, a variant of a display according to figure 29 in which the displays at 4 o'clock and at 8 o'clock have been exchanged or else a variant of a display according to figure 30 in which the displays at 3 o'clock and at 9 o'clock have been exchanged one for the other.
    Although the invention has been described above in connection with a specific embodiment as well as some explicit variants, still other additional variants can also be envisaged without departing from the scope of the invention as defined by the claims.
    权利要求:
    Claims (15)
    [1]
    1. Date mechanism (100) for a timepiece, comprising:- an input mobile (1) arranged to be driven by a basic movement;- a date wheel set (5) arranged to be driven at a rate of at least one step at the end of each day;- a catching mobile (7) in kinematic connection with said date mobile (5) by means of a catching gear (6), said catching mobile (7) being arranged on the one hand to be driven by said date mobile (5) at the rate of at least two steps per month, one of which during the transition between the 28th and the 29th of the month, and the other during the transition between the 1st <er> and the 2nd of the month, and on the other hand to drive said date mobile (5) at the rate of a number of additional steps at the end of months having less than 31 days;- a first return (2) arranged to be driven by said input mobile (1);- a second gear (3) meshing with said first gear (2) and carrying a finger (3a) arranged to drive said date wheel set (5) at a rate of one step per day;- a third return (4) meshing with said first return (2) and carrying a plurality of fingers (4a, 4b) arranged to drive said catch-up wheel (7) at the rate of a number of additional steps at the end of said months having less than 31 days, and this after the training of said date wheel set (5) by means of said finger (3a) carried by said second reference.
    [2]
    2. Date mechanism (100) according to claim 1, wherein said first (2), second (3) and third (4) references are located at least partially in a common plane.
    [3]
    3. Date mechanism (100) according to one of the preceding claims, wherein said fingers (4a, 4b) of the third reference (4) are distributed over two different levels, a first finger (4a) being on a first level and being arranged to cooperate with a 30-day month wheel (7b) included in said catch-up wheel (7), so as to drive the latter at the rate of one additional step at the end of months having 30 days, thus that a pair of fingers (4b) located on a second level and being arranged to cooperate with a toothing February 29 (7c) that comprises said take-up mobile (7), so as to cause the latter at a rate of two steps additional at the end of February.
    [4]
    4. Date mechanism (100) according to the preceding claim, wherein the toothing of said 30-day month wheel (7b) has a plurality of pairs of teeth arranged to allow driving by said first finger (4a) in both. direction of rotation of the latter, and the February 29 toothing (7c) has three teeth arranged to allow drive by said pair of fingers (4b) in their two directions of rotation.
    [5]
    5. Date mechanism (100) according to the preceding claim, wherein said take-up mobile (7) comprises at least one retractable tooth (7d) arranged to cooperate with said first finger (4a) at the end of the 28th of February. non-leap years in order to advance said catch-up mobile (7) at a rate of yet another additional step.
    [6]
    6. Date mechanism (100) according to the preceding claim, wherein said at least one retractable tooth (7d) comprises a pair of teeth arranged to cooperate with said first finger (4a) in both directions of rotation of the latter.
    [7]
    7. Date mechanism (100) according to the preceding claim, wherein said at least one retractable tooth (7c) is carried by a lever (7f) pivotally mounted on said take-up mobile (7), and whose angular position is controlled by at least one cam (8a) integral in rotation with a pinion (8b) pivotally mounted on said take-up mobile (7) and which meshes with a fixed wheel (8c) mounted on a frame element.
    [8]
    8. Date mechanism (100) according to the preceding claim, wherein said lever (7f) is a double lever which cooperates with a pair of coaxial cams (8c) desmodromically.
    [9]
    9. Date mechanism (100) according to one of the preceding claims, wherein said input mobile (1) comprises a toothed sector (1f) arranged to rotate said first reference (2) around midnight, preferably. at the rate of one turn per day.
    [10]
    10. Date mechanism (100) according to the preceding claim, wherein said input mobile (1) and said first reference (2) are arranged so as to be self-locking when said toothed sector (1f) does not mesh with said first return (2).
    [11]
    11. Date mechanism (100) according to one of the preceding claims, wherein said date mobile (5) comprises a toothed sector (5c) arranged to be able to pivot said catching gear (6) and thus said catching mobile (7) at the rate of one step at the end of the 28th of the month, one step at the end of the 29th of the month, one step at the end of the 30th of the month, one step at the end of the 31st of the month as well as a step at the end of the 1st <er> of the month, when the month has 31 days.
    [12]
    12. Date mechanism (100) according to the preceding claim, wherein said date wheel set (5) and said catch-up gear (6) are arranged so as to be self-locking when said toothed sector (5c) of said date wheel set ( 5) does not mesh with said catch-up gear (6).
    [13]
    13. Date mechanism (100) according to the preceding claim, wherein said catch-up indicator (6) is arranged to perform one third of a revolution per month.
    [14]
    14. Timepiece movement comprising a date mechanism (100) according to one of the preceding claims, said input mobile (1) being arranged to be driven by an hour wheel that comprises said movement, preferably at a rate of 'one tour per day.
    [15]
    15. Timepiece comprising a timepiece movement according to the preceding claim.
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    同族专利:
    公开号 | 公开日
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    CH5632020|2020-05-11|
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