CH719977A1 - Watch mechanism with jumping display - Google Patents

Abstract

The invention relates to a watch mechanism intended to equip a timepiece. This mechanism comprises a first jumping display member (11) and a correction device, operable by the user of the timepiece, comprising a first rocker (3) and a second rocker (4). The first (3) and second (4) rockers are arranged so that, following the actuation of said correction device by the user: i. the first rocker (3) is capable of causing the pivoting of a first pitch portion of the first display member (11); then ii. when the first rocker (3) has caused the pivoting of a first pitch portion of the first display member (11), the second rocker (4) causes the pivoting of the first display member (11) making it possible to complement the not started at step i.

Description

[0001] The present invention relates to a mechanism intended to equip a movement of a timepiece comprising a jumping display and a device for correcting this display.

[0002] In a watch mechanism with a jumping display, a display member is typically rotated in instantaneous steps. This display member, disc or needle for example, is in principle integral in rotation with teeth advancing in instantaneous steps and each step of which is typically caused by the sudden relaxation of a spring.

[0003] Whether it is a display of the day of the week, the date, the year or something else, it is always useful to be able to correct the information carried by a display disk.

[0004] One solution for correcting a display consists of intervening on the cog which drives the associated display member, typically by means of a push button, a corrector, or a slide (lock).

[0005] However, a problem exists for the correction of a jumping type display. Indeed, it is not uncommon for a cog controlling a jumping display, designed to operate instantly and therefore subject to a high speed of movement, to be unable to operate correctly under the influence of a low speed. , typically during so-called dragging training. This is the case when the inertia generated by the high speed applied to the different wheels of a cog contributes to their pivoting. In this case, it is difficult to correct this display by means of a manual correction device acting via the kinematic chain driving the associated display member. Indeed, we cannot guarantee that a user activates the correction device with sufficient speed, equivalent to that of the jumping drive. It is more accurate to consider that the speed applied by a user via a push button, a corrector or a lock on a correction device is of the order of what we have during a "training" training ( not instantaneous).

[0006] An objective of the present invention is to propose a watch mechanism intended to equip a timepiece, said mechanism comprising a jumping display and a device for correcting this display which can be controlled by the user of the timepiece and allowing its correction even when said display mechanism is in theory not capable of operating correctly under the impulse of a dragging movement.

[0007] To this end, a watch mechanism is provided intended to equip a timepiece, said mechanism comprising: a. a first jumping display member and b. a correction device operable by the user of the timepiece comprising a first rocker and a second rocker arranged so that, following the actuation of said correction device by the user, i. the first rocker is capable of causing the pivoting of a first pitch portion of the first display member; then ii. when the first rocker has caused the pivoting of a first step portion of the first display member, the second rocker causes the pivoting of the first display member making it possible to complete the step started in step i.

[0008] Advantageously, the mechanism according to the invention further comprises a second display member, typically jumping, and a drive wheel intended to be rotated in instantaneous steps and to rotate the first display member via a first kinematic chain and the second display member via a second kinematic chain. The whole is then arranged so that the first rocker actuates the drive wheel or a wheel of one of said two kinematic chains whose actuation is able to act on the display of each of the two display members by the intermediate of its kinematic chain and so that the second rocker is able to act at least on the first display member.

Preferably, the or each of the display members is rotated by a mobile comprising a wheel and a star positioned by a jumper.

[0010] Advantageously, the mechanism according to the invention is a large date type display mechanism in which the first and second display members are, preferably respectively, a tens disk and a units disk.

[0011] In this case, the tens disk typically presents the series of numbers 0, 1, 2, 3 repeated twice and the units disk typically presents a single series of numbers 0, 1, 2, 3, 4, 5 , 6, 7, 8, 9.

The correction device of the mechanism according to the present invention preferably comprises a correction rocker intended to pivot between a rest position and a correction position. This pivoting is typically done against the elastic return force of a spring. During this pivoting, the correction rocker activates each of said first and second rockers.

[0013] Advantageously, the correction device comprises a control member chosen from a push button, a corrector or a slide, intended to be actuated by the user, and acting on the aforementioned correction rocker to move it from its position rest towards its correction position.

[0014] The present invention also relates to a timepiece such as a wristwatch, a pocket watch, a clock or a clock comprising such a watch mechanism.

[0015] Other characteristics and advantages of the present invention will appear on reading the following detailed description made with reference to the appended drawings in which: – Figure 1 is a top view of a part of a date mechanism with jumping display according to a particular embodiment of the present invention; – Figures 2 to 4 are top views of the mechanism of Figure 1 without the display disk, and without the tens wheel in the case of Figure 4, in successive configurations taken during its correction

[0016] Figures 1 to 4 illustrate part of a date display mechanism comprising a tens indicator 11 intended to form with a units indicator (not shown) a date display.

The tens indicator 11 has the shape of a disk and carries the series of numbers 0, 1, 2, 3 repeated twice in counterclockwise direction. The tens indicator 11 is carried by a tens mobile comprising a tens wheel 110 which has external teeth and a positioning star 112 with eight asymmetrical teeth which cooperates with a jumper 113 for its angular positioning, integral in rotation with the tens indicator 11. one from the other.

The units indicator typically takes the form of a disk bearing a series of numbers 0, 1, 2, 3, 4, 5, 6, 7, 8, 9. It is typically carried by a units mobile comprising a unit wheel and a positioning star comprising ten teeth cooperating with a jumper for its angular positioning, integral in rotation with one another.

The units and tens being indicated by separate display elements, the display of the date described here is of the “large date” type and therefore allows the use of indications of reasonable size to facilitate reading.

Generally, the date display mechanism is arranged to drive the units wheel and the units indicator thirty times per month, the tens wheel 110 and the tens indicator 11 four times per month.

According to the illustrated embodiment, the date display mechanism comprises a drive wheel arranged to be kinematically connected to the movement of the timepiece comprising the date device.

Said drive wheel typically comprises thirty-one teeth and is kinematically connected to the movement of the timepiece for its training of one step per day. It is configured to be driven by instantaneous steps, caused for example by the sudden relaxation of a spring. Such a kinematic connection is well known and will not be described in detail below.

The tens indicator 11 is kinematically connected for its drive to the aforementioned drive wheel by a first kinematic chain, and the units indicator is kinematically connected for its drive to said drive wheel by a second chain cinematic.

[0024] In the illustrated embodiment, the drive wheel is kinematically connected to the tens wheel 110 and to the tens indicator 11 to drive it. The drive wheel directly or indirectly drives a tens drive wheel 61 secured to a tens cam 62 comprising four teeth, the distribution of which corresponds to the change of tens in a complete month of thirty-one days (passage of the ten 0 to 1 after nine days, 1 to 2 after ten days, 2 to 3 after ten days and 3 to 0 after 1 day). The tens cam 62 meshes with a tens star 8 which also includes four teeth. The tens star 8 is part of a mobile also comprising an intermediate tens wheel 64 coaxial and integral in rotation with the tens star 8. The intermediate tens wheel 64 meshes with a second intermediate tens wheel 65 which meshes with the external teeth of the tens wheel 110 carrying the tens indicator 11.

The operation of the display device illustrated in the figures is described below.

[0026] Once a day (around midnight), the drive wheel, driven by the movement of the timepiece, pivots by one step, i.e. 1/31<th>of a turn (one step for a simple calendar, at least one step for an annual, perpetual or secular calendar), in a jumping manner. It then drives the tens indicator 11 via the first kinematic chain 61, 62, 8, 64, 65, 110 and/or the units indicator via the second kinematic chain depending on the date.

[0027] When only the unit display disk must be rotated, for example for the passage from the 11th to the 12th or from the 25th to the 26th of the month, the pivoting of one step of the drive wheel causes the pivoting of a thirty-first turn of the tens driving wheel 61 and the tens driving cam 62 but none of the four teeth of the tens driving cam 62 is able to act on the star of the tens tens 8, the tens disk 11 then remains immobile. The unit disk is rotated in a conventional manner via the second kinematic chain, as described above.

[0028] At the end of the month, when changing from 31 to 01, the tens indicator 11 rotates one step to go from 3 to 0 while the units indicator must remain stationary to continue to display the number 1 To do this, the drive wheel and the second kinematic chain are arranged so that, once a month, when passing from 31 to 01, the pivoting of the drive wheel does not result in the drive of the units indicator. Several known arrangements are possible to achieve this.

[0029] When going from 9 to 10, from 19 to 20 and from 29 to 30, the tens and units display discs advance simultaneously by one step.

As indicated above, the present invention relates to a watch mechanism comprising at least one jumping display member and a device for correcting this display, operable by the user.

[0031] Concerning the date display mechanism described above, several reasons encourage those skilled in the art to choose the entry point for the correction upstream of the tens star 8, that is to say say typically at the level of the tens driving wheel 61, at the level of the driving wheel or on a possible wheel arranged between these two wheels.

The first reason is that this makes it possible to correct the date display with a single corrector correcting both the tens and units display. Indeed, if we acted between the tens star 8 and the tens display disc, the correction would only impact the tens indicator 11.

Another reason is that an action between the tens star 8 and the units indicator 11 would desynchronize the mobile comprising the tens driving wheel 61 and the tens cam 62 of the associated tens display. It is for this same reason that a correction of the tens display by desynchronizing the positioning star 112 of the tens wheel 110 is not possible.

The mobile carrying the tens star 8 and the intermediate tens wheel 64 preferably carries an anti-double jump device. When this is the case, this device makes it impossible for the tens star 8 to pivot other than under the impulse of the teeth of the tens cam 62.

[0035] Finally, another reason is that the mechanism does not provide sufficient space around the positioning star 112 and the tens wheel 110 to provide sufficient force to move the star one step forward. positioning 112.

[0036] More generally, in a jumping display mechanism, several reasons may push the watchmaker to correct the jumping display by using the kinematic chain driving said display member, thus involving intervening for the correction in upstream of a force transmission zone whose proper functioning is in theory conditioned by a minimum actuation speed. This is typically the case when the kinematic chain driving the jumping display member includes an anti-double-jump device and/or when the arrangement of the different elements of the timepiece does not allow correction directly on the display body.

[0037] In the date display mechanism partly illustrated in the figures, the first kinematic chain is such that the advancement of an instantaneous step of the drive wheel a 9, a 19, a 29 or a 31 of the months during the normal operation of the mechanism causes the tens display disk 11 (and the units display disk, except 31) to advance one step. However, the advancement of one step of this same drive wheel with a lower speed would not allow the advancement of one step of the tens display disc 11. In the example illustrated, this corresponds to the fact that , when the tens driving wheel 61 pivots in a dragging manner by one step at a time when this should cause the tens display to advance by one step, that is to say during a passage of the tens 9 to 10, from 19 to 20, from 29 to 30 or from 31 to 01, the teeth of the tens cam 62, cooperate with the tens star 8 but are, due to lack of speed, not able to do so. pivot the tens pinion 8 sufficiently to cause the tens positioning star 112 to advance one step, that is to say the passage of the jumper 113 above a tooth of the tens star positioning 112 tens. However, as indicated previously, the actuation of the correction device carried out by a user, typically by pressing a push button, is generally slow and generates little inertia. It causes a rotation speed significantly lower than that caused each day by the instantaneous pitch of the drive wheel of mechanism 1. The movement generated by the actuation of the correction device by a user is also very variable, it depends on the user and varies from one correction to another for the same user. Thus, a correction device by means of which a user would act to advance by one step the drive wheel, the tens drive wheel 61 or a wheel of the cog possibly connecting these two wheels, would not, in any case, be in the most cases, not suitable to allow the correction of the tens disk.

The correction device of the mechanism according to the invention illustrated in Figures 1 to 4 makes it possible to overcome this drawback.

This correction device comprises a main correction rocker 2 intended to pivot between a rest position illustrated in Figure 1 and a correction position illustrated in Figure 4, against the elastic return force of a spring called spring main 6.

[0040] The correction device also comprises a control member, typically a push button or a corrector (not illustrated), intended to be actuated by the user, and acting on the main correction rocker 2, for example at the level of the arrow F illustrated in Figure 1, to move it from its rest position to its correction position.

The correction device also comprises a first secondary correction flip-flop 3 and a second secondary correction flip-flop 4, controlled by the main correction flip-flop 2. These secondary correction flip-flops 3, 4 are arranged so that: – in a first portion of travel from its rest position to its correction position (Figures 1 to 3), the main correction rocker 2 actuates the first secondary correction rocker 3 by rotating it clockwise against the elastic return force of a spring called first secondary spring 31, then - in a second portion of travel from its rest position towards its correction position (Figures 2 to 4), the main correction rocker 2 actuates the second secondary correction rocker 4 in rotating it counterclockwise against the elastic return force of a spring called the second secondary spring 41.

The first secondary correction rocker 3 is arranged so that, at each pivoting of the correction rocker 2, it cooperates with the teeth of the cam driving wheel 61 to rotate it by one step, i.e. one thirty -and-oneths of a turn, counterclockwise.

[0043] This typically causes the pivoting of the drive wheel which in turn causes, except on the 31st of the month, the advancement of one step of the unit display member.

[0044] During a correction when the date display mechanism partly shown in the figures displays one of the dates 9, 19, 29 and 31, the pivoting of one step of the cam driving wheel 61 and of the cam tens 62 to which it is integral, with a speed of movement which is considered equivalent to that of a dragging mechanism, causes the pivoting of the tens star 8, as illustrated in Figures 2 and 3. However, without the the inertia that this star 8 receives daily during the instantaneous jumps of the training wheel, the star 8 does not pivot by a sufficient angle to cause the tens indicator 11 to advance by one step. , as can be seen in Figure 3, when the tens driving cam 62 has finished its step, the positioning star 112 has pivoted by a first portion of step but the tooth 112A has still not passed the point jump of the jumper 113 against which it was resting before the activation of the correction device (the step is not complete).

[0045] At the end of this first step portion, the second secondary correction rocker 4 is able to interact with the tooth 112B which was previously unreachable. The contact between the second secondary correction flip-flop 4 and the tooth 112B is illustrated in Figure 3.

[0046] From this position, the pivoting of the second secondary correction rocker 4 (which has already started) allows the positioning star 112 to pivot by a second part of travel (Figures 3 and 4) thus allowing for the jumper 113 to let the tooth 112A pass and for the positioning star 112 to finish its step. The tens display disk 11 has thus been incremented by one step.

Consequently, the mechanism 1 according to the present invention equipped with the correction device comprising in particular the members 2, 3, 4, 6, 31 and 41 offers an advantage over the jumping display mechanisms of the prior art in that that it ensures that the user's actuation of the correction device results in a correction, even when it acts upstream of the force transmission zone, the proper functioning of which is in theory conditioned by a speed minimum and even if the speed of movement applied by the user to the control member of the correction device is low and/or irregular.

[0048] More generally, in a system operating mainly thanks to the inertias involved, the correction device according to the invention makes it possible to guarantee the correction whatever the speed and the force that the user will apply on the organ of control of the correction device.

The preceding description attempts to describe a particular embodiment by way of non-limiting illustration, and the invention is not limited to the implementation of certain particular characteristics which have just been described, such as for example the shapes represented for the different constituents.

[0050] In the illustrated embodiment, the second secondary correction flip-flop 4 is flexible. This makes it possible to reduce the stresses in the correction device and to ensure synchronization with tooth 112B. Alternatively, a second rigid secondary correction flip-flop of the same type as the first secondary correction flip-flop 3 would be entirely possible. In variants, it could also be envisaged that the first secondary correction flip-flop 3 be flexible.

[0051] In the example illustrated, the positioning star 112 associated with the display disk 11 has asymmetrical teeth but other tooth shapes could be considered.

[0052] When the mechanism according to the invention comprises at least two jumping display members that we want to correct by means of a single control member, it may be interesting to add this to the correction device. mechanism a third secondary correction rocker arranged so that when the first secondary correction rocker has caused the pivoting of a first pitch portion of the second jumping display member, the third secondary correction rocker causes the pivoting of the second member display allowing you to complete this step. This is useful when the kinematic chain allowing, from the drive wheel, the driving of the second display member, is only functional under the influence of sufficient speed, guaranteed during a jump instantaneous but not during manual operation by a user.

[0053] In the example illustrated, the display members are display disks. Alternatively, it could be other display organs.

[0054] In the preceding description, the correction device comprises a control member, typically a push button or a corrector, intended to be actuated by the user, and acting on the correction rocker 2. It is at the scope of those skilled in the art to change the means by which the user acts on the two secondary correction flip-flops. The control member could for example be of the slider (lock) type and the secondary correction rockers could be moved by a system moving in translation, rather than by a rocker.

[0055] In the example illustrated, the correction device allows the correction of two display elements, simultaneously or not. Alternatively, the invention may relate to a device comprising a single display member or more than two display members.

Claims (8)

1. Watch mechanism intended to equip a timepiece, said mechanism comprising – a first jumping display member (11) and – a correction device operable by the user of the timepiece comprising a first (3) and a second rocker (4) arranged so that, following the actuation of said correction device by the user, i. the first rocker (3) is capable of causing the pivoting of a first pitch portion of the first display member (11); Then ii. when the first rocker (3) has caused the pivoting of a first pitch portion of the first display member (11), the second rocker (4) causes the pivoting of the first display member (11) making it possible to complement the not started at step i. 2. Mechanism according to claim 1, characterized in that it comprises a second display member and a drive wheel intended to be rotated in instantaneous steps and to rotate the first display member (11) via a first kinematic chain and the second display member via a second kinematic chain, the whole being arranged so that the first rocker (3) actuates the drive wheel or a wheel of one of said two kinematic chains whose actuation is able to act on the display of each of the two display members (11) via its kinematic chain and so that the second rocker (4) is able to act at least on the first display member (11). 3. Mechanism according to claim 1 or 2, characterized in that the or each of the display members (11) is rotated by a mobile comprising a wheel (110) and a star (112) positioned by a jumper (113 ). 4. Mechanism according to claim 2 or 3, characterized in that it is a large date type display device and in that the first (11) and second display members are, preferably respectively , a tens disk (11) and a units disk. 5. Mechanism according to claim 4, characterized in that the tens disk (11) presents the series of digits 0, 1, 2, 3 repeated twice and in that the units disk presents a single series of digits 0, 1, 2, 3, 4, 5, 6, 7, 8, 9. 6. Mechanism according to one of the preceding claims, characterized in that the correction device comprises a correction rocker (2) intended to pivot between a rest position and a correction position and in that, during this pivoting it activates each of said first and second rockers (3, 4). 7. Mechanism according to claim 6, characterized in that the correction device comprises a control member chosen from a push button, a corrector or a slide, intended to be actuated by the user, and acting on the correction rocker (2) to move it from its rest position to its correction position. 8. Timepiece such as a wristwatch, a pocket watch, a clock or a clock comprising a watch mechanism according to one of the preceding claims.