WO2019175687A1

WO2019175687A1 - Timepiece

Info

Publication number: WO2019175687A1
Application number: PCT/IB2019/051356
Authority: WO
Inventors: Laurence DONZE; Caroline FRELECHOX; Bruno BORLON; Yannick Chatelain; David LENGACHER; Philippe Ruedin
Original assignee: Lvmh Swiss Manufactures Sa
Priority date: 2018-03-16
Filing date: 2019-02-20
Publication date: 2019-09-19
Also published as: EP3765922B1; EP3765922A1; CH714795A1; CH714795A9

Abstract

The invention relates to a timepiece comprising a sliding pinion correction mechanism (80) for indications supplied by a first display component and by a second display component, said correction mechanism comprising a sliding wheel (3) comprising two intermediate wheels (40, 30), the first intermediate wheel (40) being driven by the sliding pinion (80) so that the sliding wheel (3) is moved to a first position, in which the second intermediate wheel (30) drives the first display wheel (1) in a first direction of rotation, and to a second position, in which the second intermediate wheel (30) drives the second display wheel (2) by rotating in a second direction of rotation. The second intermediate wheel (30) comprises an asymmetric tooth (310), which enables effective correction of the indications provided by the two display components, the driving of which is provided by wheels comprising different teeth.

Description

Timepiece

Technical area

The present invention relates to a timepiece, including a timepiece comprising a correction mechanism indications provided by a first display member and a second display member.

State of the art

[0002] Parts Comprising a First Display Element

providing a first indication and a second display member for providing a second indication different from the first are well known. In this context the expression "display member" means a needle, a ring, a disk, etc. which cooperates with a dial to provide an indication. This indication is not necessarily a temporal information. Non-limiting examples of this indication are: a calendar (annual, perpetual, day / date, etc.); moon phases, tides, regattas, AM / PM displays; a second time zone, for example a GMT time; etc.

The displacement of a display member is generally provided by a display mobile comprising a toothing. This mobile can be directly connected to the display member, by driving it by a direct contact, or one or more mobile intermediaries between the mobile display and the display member ensure the training of the display unit by the display mobile.

In the case where the display member is a needle, for example an hour hand, its movement is ensured by a toothed wheel. hours cinematically linked to this needle. This hour wheel can be driven, directly or indirectly, by a mobile display. In the case where the display member is a disc or a ring, for example a date ring, this ring or disc may comprise a toothing that ensures its displacement. In other words, if a display member comprises a toothing, for example in the case of a disc or a ring, the notion of display member may coincide with that of display mobile.

Correction mechanisms that allow both the correction of an indication provided by a first display member and an indication provided by a second display member are known per se.

These correction mechanisms generally comprise a winding stem mounted in a plate of a watch including the timepiece, this winding stem comprising a main axis. The winding stem is generally movable in translation in the direction of this main axis and can occupy different axial positions. It is also mobile in rotation about this axis: it can turn in a clockwise direction and also in a counterclockwise direction. For example, the winding stem is movable between at least a first correction position and a winding position. In some cases, it can occupy a second correction position.

As a rule, this winding stem carries a sliding pinion (or sliding pinion), which is movable on the winding stem. In the correction position, the sliding pinion moves in a known manner on the winding stem by allowing a kinematic connection with a sliding mobile mounted freely in rotation. This mobile walkman is configured to cooperate directly or via a gear with the teeth of the mobiles that allow the training of the first display member or the second display member, so as to correct the information carried by these display members.

A known example of this mobile walkman comprises a first reference, a second reference and a third reference, each reference belonging to a floor differs from the mobile walkman.

These three stages are generally at least partially superimposed. They can be coaxial.

In this context, the term "return" refers to a toothed wheel, that is to say comprising at least one tooth. Known references are wheels having a toothing along their entire edge, this toothing being continuous. In other words, the pitch between two teeth, that is to say the distance between two consecutive teeth, is the same for all the return. As a general rule, the teeth of the known references also have the same shape. They are generally symmetrical, that is to say they include an axis of symmetry belonging to a plane substantially perpendicular to the plane of the wheel (or in general of the mobile) to which the tooth belongs and passing through the tooth and by the center of rotation of this wheel (or mobile).

In contrast, a tooth devoid of any axis of symmetry belonging to a plane substantially perpendicular to the plane of the wheel (or in general of the mobile) to which the tooth belongs and passing through the tooth and the center of rotation of this wheel (or mobile) in this context is an asymmetric tooth.

In this context, a tooth having a substantially triangular section is defined by a first sidewall and a second sidewall, which constitute two of the three sides of the triangle, the third side being formed by the base of the tooth. This also applies to any tooth with a point (rounded or not), even if the sidewalls have a certain curvature.

In the case of a tooth having a substantially rectangular or square section, in other words in the case of a tooth having a substantially flat, the first flank and the second flank are the sides of the rectangle respectively of the square which define, with the head and the base of the tooth, the rectangle respectively the square. This applies even if the first flank and the second flank have some curvature.

In this context, the height of a tooth indicates the distance between the top of a sidewall (that is to say, its farthest point of the bottom of the toothing) and the bottom (flat or round) of the teeth in correspondence of this flank.

A tooth is symmetrical if for example, the height, the shape of the first side of the tooth and the inclination of the flank with respect to the bottom (flat or round) of the toothing in correspondence of this flank is

substantially identical to the height, form respectively inclination of the second side of the tooth.

A substantially sharp tooth which has a symmetry with respect to an axis belonging to a plane perpendicular to the main plane of a toothed wheel to which the tooth belongs, this plane passing through the axis of rotation of the toothed wheel and by the distal end (tip) of the tooth is an example of a symmetrical tooth.

A tooth having a flat head which has a symmetry with respect to an axis belonging to a plane perpendicular to the main plane of a toothed wheel to which the tooth belongs, this plane passing through the axis of rotation of the toothed wheel and by the center point of the flat head of the tooth is another example of a symmetrical tooth.

The first reference solutions of the state of the art is driven in a known manner by the sliding pinion so that, in the direction of rotation imposed on the first return via the winding stem, the mobile player is moved in a position where the second referral leads (directly or indirectly, ie via one or more intermediates) the first display member rotating in a first direction of rotation.

In this position, or in another position, the third return causes (directly or indirectly) a second display member.

The mobile walkman known therefore comprises three different stages to make two corrections, which does not optimize the thickness of the timepiece.

In addition, in the case where the references are not coaxial, the space occupation of the mobile walkman is not optimal.

An example of such a mobile walkman is described in document CH703697, wherein the mobile player comprises two driven wheels (corresponding to the second and third references above) at least partially superimposed. These wheels are not coaxial. The profile of the teeth of the driven wheels can be individualized to adapt to that of the mobiles with which they are intended to cooperate. Indeed, these mobiles may have different teeth. In the example described in this document, a mobile makes it possible to correct the display of the date and the other the display of a second time zone.

Another known example of the mobile walkman comprises a first reference and a second reference, each reference belonging to a floor differs from the mobile walkman. However, this mobile walkman makes it possible to make a single correction.

The document CH684920 proposes to use a mobile walkman comprising a first return driven in known manner by the sliding pinion (reference 19 in Figure 1 of this document), and a second reference (reference 21 in Figure 1 of this document). document) which, in the sense of rotation that is imposed on the sliding pinion via the winding stem, will move either in a first position where it meshes through a gear with the toothing of a first display member (a star of days) or in a second position where it meshes directly with the toothing of a second display member (a date ring).

Document CH684920 is completely silent as to the characteristics of the second reference.

In the case where the two mobile displays had different teeth, for example teeth having a different shape, it is not clear how the second reference of this document would allow an effective correction of both the indication carried by the first display member and the indication carried by the second display member.

Brief summary of the invention

An object of the present invention is to provide a timepiece free of limitations of known timepieces. Another object of the invention is to propose a part

timepiece having a reduced thickness while allowing effective correction of the indications carried by two display members whose drive is provided by mobiles having different teeth, that is to say having different teeth, for example having a shape, a height and / or a slope of the different sides.

According to the invention, these objects are achieved in particular by means of a timepiece according to claim 1.

This solution has the advantage over the prior art to reduce the thickness of the timepiece because it includes two references, while allowing the correction of the indication carried by two display members whose drive is provided by mobiles having different teeth: this is possible thanks to the fact that the second reference comprises at least one asymmetrical tooth.

In this context, the expression "asymmetrical tooth" indicates that the height, the shape of the first flank of this tooth and / or its inclination relative to the bottom (flat or round) of the toothing in correspondence of this first flank is significantly different from the height, shape

respectively inclination of the second side of the tooth.

The presence of a first asymmetrical tooth allows effective correction of the indications carried by two display members whose drive is provided by mobile having different teeth, because a side of this tooth is adapted to lead the first. mobile and another side is adapted to drive the second mobile. It is thus possible to adapt each side of the first tooth to the type of mobile it is supposed to lead.

In a variant, the second reference according to the invention comprises a single tooth.

The first display mobile generally comprises a continuous toothing, comprising teeth all identical to each other. The dentes are generally spaced by a constant pitch along all the teeth. The same considerations apply to the second display mobile.

In a variant, each tooth of the first display mobile comprises a third sidewall and a fourth sidewall: in this variant, the first sidewall of the second return tooth is arranged to cooperate with this third sidewall, so as to cause the first mobile display. In a variant, each tooth of the second display mobile comprises a fifth flank and a sixth flank: in this variant, the second flank of the tooth of the second return is arranged to cooperate with this fifth flank, so as to cause the second mobile display.

In a variant, the first flank of the tooth of the second return has a height different from the height of the second sidewall. Indeed, in a preferred embodiment, a display mobile is a date ring which generally comprises teeth having a height substantially greater than that of other moving teeth of a movement. The height of one of the flanks of the tooth of the second return, in particular the flank which is intended to cooperate with this ring, is thus adapted to carry out the drive of this ring.

In a variant, which can be combined with the previous one, the first flank of the first tooth of the second return is substantially perpendicular to the bottom of the second return, that is to say to the part of the second return adjacent to the second return tooth in

match of this first flank and devoid of teeth. Indeed, in the preferred embodiment where the display mobile is a date ring which generally comprises teeth having a flank

perpendicular to the bottom of the toothing of the ring, this characteristic of the tooth of the second return allows the drive of this ring.

In a preferred embodiment, the tooth of the second reference is a first tooth which is followed by a second tooth. In a preferred embodiment the second reference comprises only two teeth, namely the first tooth and the second tooth. In a preferred variant, the pitch between the first tooth and the second tooth

corresponds substantially to the pitch of the toothing of a display mobile, for example the first display mobile. In a preferred variant, the shape of the second tooth is adapted substantially to the shape of the teeth the first display mobile, so as to drive the first display mobile.

Indeed, during the actuation of the correction mechanism, the position of the first tooth when in contact with a mobile

display, for example the first display mobile, is random. The force of the contact can be decomposed into two components, one tangential, that is to say substantially normal to the radius of the first display mobile, and the other radial, that is to say along the the direction of the radius of the first display mobile.

It is possible that the radial component is zero or negligible compared to that tangential, which allows excellent transmission of torque from the second reference to the first display mobile. It is also possible that the radial component of this contact becomes too large compared to that tangential, which could block and damage one or more components of the timepiece, for example and without limitation the first display mobile or the winding stem.

The presence of the second tooth solves this problem because it allows to give a substantially tangential force to the first display mobile before the first tooth comes into contact with the first display mobile.

In other words, the second tooth makes it possible to further improve the transmission of the torque from the second reference to the first display mobile and / or to prevent the blockage or breakage of one or more components of the timepiece ..

In a preferred embodiment, this second tooth is symmetrical. In another preferred embodiment, the height of this second tooth (corresponding to the height of each of the two symmetrical flanks) is smaller than the height of the highest flank of the first tooth. Indeed, in a preferred embodiment, the second tooth does not cause the toothing of the second display mobile (the date ring, for example).

In another preferred embodiment, each second tooth is followed by a third tooth. In a preferred embodiment the second reference comprises only three teeth, namely the first tooth, the second tooth and the third tooth. In a variant

preferentially, the pitch between the second and the third teeth corresponds substantially to the pitch between the first tooth and the second tooth, which in turn substantially corresponds to the pitch of the toothing of a mobile

display, for example the first display mobile.

Similarly to the second tooth, the presence of the third tooth allows the contact force with the first display mobile is substantially tangential to the first display mobile in case it was not possible or that was partially possible with the first tooth and / or the second tooth.

In other words, the third tooth makes it possible to further improve the transmission of the torque on the part of the second reference to the first display mobile.

In a preferred embodiment, this third tooth is symmetrical. In another preferred embodiment, the height of this third tooth (corresponding to the height of each of the two symmetrical flanks) is smaller than the height of the second tooth. Indeed, in a preferred embodiment, the third tooth also does not cause the toothing of the second display mobile (the date ring, for example).

In a preferred embodiment the second reference therefore comprises a single group of three teeth, including a single group comprising a first tooth, a second tooth and a third tooth. Heights these teeth are decreasing from the first tooth (one side of which has the highest height). The second tooth is between the first and the third.

In the case where the second reference comprises a single group of three teeth, it also comprises a toothless zone. In other words, the gear of the second gear is "discontinuous" because it is not present along the entire edge of the second gear. In other words again, the pitch of the second reference is not always constant.

For example, the second reference comprises a first step (one that separates the first tooth from the second and optionally the second from the third, and which substantially corresponds to the pitch of the toothing of the first mobile) and a second step (the between the flank of the first tooth which is not consecutive to a flank of the second tooth, and the flank of the third tooth which is not consecutive to the flank of the second tooth) greater than the first step, for example at the less five times bigger than the first step.

Those skilled in the art will understand that this group of teeth could comprise another integer number N of teeth having decreasing heights, and separated by a pitch which corresponds substantially to the pitch of the toothing of the first mobile. However, this group of teeth should not cover all the perimeter of the second return, to leave space to allow cooperation of the first tooth with the teeth of the second mobile display (the date ring for example), which has a toothing different from that of the first mobile display.

In yet another variant, the timepiece according to the invention comprises at least two groups of teeth, preferably at least two groups comprising one, two, three or as a rule N teeth each. In a preferred embodiment, these groups of teeth are equidistant from one another. Two groups of consecutive teeth are separated from each other by a zone devoid of teeth. Alternatively, the toothless area of the second return is substantially rectilinear or concave or convex.

In a preferred embodiment, the first display member being a jumping display member, for example a jumping needle which indicates for example the time of a second time zone. Indeed the correction mechanism according to the invention, which does not allow a

instant correction of an indication since the position of the first tooth of the second reference is random when it is in contact with the first display mobile, is well adapted to a jumping display member. The second reference of the mechanism according to the invention is preferably manufactured by the so-called "Liga" method ("Lithography,

Galvanoformung, Abformung "). It can alternatively be manufactured by stamping, over or by any other manufacturing process.

The present invention also relates to a watch for example a mechanical watch, including a mechanical chronograph watch, including the timepiece according to the invention. In a variant this watch is at least partly a skeleton watch to allow the user to see at least a part of the timepiece according to the invention.

BRIEF DESCRIPTION OF THE FIGURES [0060] Examples of implementation of the invention are indicated in the description illustrated by the appended figures in which:

FIG. 1 illustrates a view from above of a watch comprising an embodiment of the timepiece according to the invention, when the second referral cooperates with the second display mobile. FIG. 2 illustrates a view from above of a watch comprising an embodiment of the timepiece according to the invention, when the second referral cooperates with the first display mobile.

Illustrates another top view of a watch comprising an embodiment of the timepiece according to the invention, when the second return cooperates with the first display mobile.

[0064] FIG. 4 illustrates a view from above of a detail of FIG. 1.

Example (s) of embodiment (s) of the invention

[0065] Figure 1 illustrates a top view of a watch 1000 comprising an embodiment of the timepiece according to the invention.

In this variant, the timepiece comprises:

a first display mobile (the wheel 1) driving via an intermediate wheel 90 a first display member (in this case a wheel 70 hours of a second time zone) to provide a first indication (the second time zone); time in this case),

a second display mobile which in this case corresponds to the second display member (the date ring 2) making it possible to provide a second indication 200 (the date for example), for example through a non-illustrated wicket .

The first display unit 1 of Figure 1 comprises a continuous toothing, including teeth 110 all identical to each other. The teeth are generally spaced by a constant pitch P1 along all the teeth. The second display unit 2 of Figure 1 comprises a continuous toothing, including teeth 210 all identical to each other. The teeth are generally spaced by a constant pitch P2 along all the teeth.

The teeth 110 of the first display unit 1, better visible in Figure 4, are symmetrical. FIG. 4 shows a tooth 110 symmetrical with respect to the axis A1, which belongs to a plane substantially

perpendicular to the plane of the first display mobile 1 and which passes through the tip of the tooth 110 and the center of rotation C1 of the display mobile 1.

As shown in Figure 4, the height, the shape of the first flank 111 of each tooth 110 and its inclination relative to the bottom 102 of the toothing is substantially identical to the height, shape

respectively inclination of the second flank 112 defining with the first 111 each tooth 110.

The correction mechanism illustrated in FIG. 1 makes it possible to correct both the first indication (the time of a second time zone for example) and the second indication (the date of the calendar, for example), and comprises:

- a winding stem 60,

a sliding pinion 80 carried by the winding stem,

- a mobile walkman 3.

The winding stem 60 has at its end a ring 62. In the case where the timepiece comprises a barrel (not shown), this rod allows not only to manually raise a barrel spring (not shown) but also to correct the information carried by the display members.

The drive mechanism of the sliding pinion 80 is well known to those skilled in the art and will not be described in detail here. The mobile device includes:

a first reference 40 belonging to a first stage of the traveling mobile 3 (a lower stage in this case, that is to say the platinum side of the movement), and

a second reference 30 which in the illustrated example is coaxial with the first reference 40 (they share the same axis 50) and belongs to a second stage of the mobile device 3 differs from the first stage (an upper stage in this case, that is, the dial side of the movement).

In the example shown, the mobile player 3 comprises two floors only, which reduces the thickness of the room

timepiece according to the invention.

In known manner, the first reference 40 is driven by the sliding pinion 80 so that, in the direction of rotation imposed on the first return via the winding stem 60, the mobile device 3 is moved to a first position where the second reference 30 leads by

through the display unit 1 a first display member (the hour wheel 70 in this case) rotating in a first direction of rotation (illustrated by the arrow F1 in Figures 2 and 3), and in a

second position (visible in Figure 1) where the second reference 30 drives the second display member 2 by rotating in a second direction of rotation opposite to the first (illustrated by the arrow F2 in Figure 1).

According to the invention, the second reference 30 comprises at least a first tooth 310, better visible in Figure 4, the first tooth being asymmetrical because devoid of any axis of symmetry as defined above.

Indeed, the height, the shape of the first flank 311 of this tooth and / or its inclination with respect to the bottom 302 of the toothing is

substantially different from the height, form respectively inclination of the second flank 312 defining with the first 311 the tooth 310. The presence of a first asymmetric tooth 310 allows effective correction of the indications carried by the two display members whose drive is provided by mobiles 1, 2 comprising different teeth.

Indeed, in the illustrated example, the flank 311 is adapted to drive the first mobile 1 and the other flank 312 is adapted to drive the second mobile 2. It is thus possible to adapt each flank of the first tooth to the type of mobile that the flank is supposed to lead.

In other words, the first flank 311 of the first tooth 310 of the second return 30 is arranged to cooperate with the flank 111 of the first mobile 1.

In the same way, the second flank 312 of the first tooth 310 of the second return 30 is arranged to cooperate with the flank 212 of the second mobile 2.

In the variant of Figures 1 to 4, the second flank 312 of the first tooth 310 of the second reference 30 has a height H2, visible in Figure 4, different from the height H1 of the first sidewall 311. Indeed, in the variant shown in Figures 1 to 3, the second display unit 2 is a date ring which generally comprises teeth 210 having a height substantially greater than that of the teeth of other mobile movement. The height of the flank 312 of the first tooth 310, this flank 312 being intended to cooperate with this ring 2, is thus adapted to carry out the driving of this ring 2.

In the variant illustrated in the figures, the first flank 311 of the first tooth 310 of the second return 30 is substantially perpendicular to the bottom 302 of the second return, that is to say to the part of the second return adjacent to the first tooth 310 and devoid of teeth. Indeed, in the variant where the display mobile 2 is a date ring which generally comprises teeth having a flank 212 perpendicular to the bottom 202 of the toothing of the ring, this characteristic of the first tooth 310 allows the drive of this ring 2.

In the variant of Figures 1 to 4, the first tooth 310 is followed by a second tooth 320. In a preferred embodiment (not shown) the second reference comprises only two teeth, namely the first tooth and the second tooth.

In the variant illustrated in Figure 4, the pitch P3 between the first tooth 310 and the second tooth 320 substantially corresponds to the pitch P1 of the toothing of the first display mobile 1. In addition, in this variant illustrated the shape of the second tooth 320 corresponds

substantially to the shape of the teeth of the first display mobile 1.

Indeed, during the actuation of the correction mechanism, the position of the first tooth 310 during its contact with the first display mobile 1, is random. The force of the contact can be decomposed into two components, one tangential, that is to say substantially normal to the radius r (illustrated in FIG. 2) of the first display mobile 1, and the other radial, c that is to say along the direction of the radius r of the first display unit 1.

It is possible that the radial component is zero or negligible relative to the tangential component, which allows excellent transmission of the torque from the second reference 30 to the first display unit 1. It is also possible that the radial component of this contact becomes too large compared to the component

tangential, which could lead to a displacement or even a

damage to at least one component of the timepiece.

The presence of the second tooth 320 solves this problem because it allows the contact force with the first display mobile 1 is substantially tangential to the first display mobile 1 before the tooth 310 comes into contact with the toothing of the first display mobile.

In other words, the second tooth 320 makes it possible to further improve the transmission of the torque from the second reference 30 to the first display unit 1.

As shown in FIG. 3, the presence of the second tooth also makes it possible to directly drive the first display mobile in the case where the position of the first tooth 310 during the contact between the second reference 30 and the first mobile. 1 would not allow it or would not allow it to be effective.

In the variant of Figures 1 to 4, the second tooth 320 is symmetrical. FIG. 4 shows a tooth 320 symmetrical with respect to the axis A2, which belongs to a plane substantially perpendicular to the plane of the second mobile 30 and which passes through the tip of the tooth 320 and through the center of rotation C3 of the second mobile 30 .

In another preferred embodiment, the height of the second tooth 320 (corresponding to the height of each of the two symmetrical flanks) is smaller than the height H2 of the highest flank of the first tooth. Indeed, in a preferred embodiment, the second tooth never comes into contact with the toothing of the second display mobile (the date ring 2). In a preferred variant, the height of this second tooth (corresponding to the height of each of the two symmetrical flanks) corresponds substantially to the height H1 of the smallest flank of the first tooth 310.

In the variant of Figures 1 to 4, each second tooth 320 is followed by a third tooth 330. In a variant (not shown) the second reference 30 comprises only three teeth, namely the first tooth 310, the second tooth 320 and the third tooth 330. In the variant of Figures 1 to 4, the pitch P4 between the second tooth 320 and the third tooth 330, visible in Figure 4, substantially corresponds to the pitch P3 between the first tooth 310 and the second tooth 320, which at its turn substantially corresponds to the pitch P1 of the toothing of the first display mobile.

In a similar manner to the second tooth 320, the third tooth 330 makes it possible to further improve the torque transmission from the second return 30 to the first display unit 1.

In a preferred embodiment, this third tooth 330 is symmetrical. FIG. 4 shows a tooth 330 symmetrical with respect to the axis A3, which belongs to a plane substantially perpendicular to the plane of the second mobile 30 and which passes through the central point of the flat head of the tooth 330 and through the center of rotation C3 of the second mobile 30.

In another preferred embodiment, the height of this third tooth (corresponding to the height of each of the two symmetrical flanks) is smaller than the height of the second tooth. Indeed, in a preferred embodiment, the third tooth also does not cause the toothing of the second display mobile (the date ring, for example).

In the variant illustrated in Figures 1 to 4, the head of the third tooth 330 is substantially flat. However, this characteristic is not essential and the head of the third tooth 330 could alternatively be rounded or pointed, provided that the height of this third tooth 330 is less than that of the second tooth 320.

In a preferred embodiment (not shown), the second reference 30 therefore comprises a single group of three teeth, including a single group comprising a first tooth 310, a second tooth 320 and a third tooth 330. The heights of these teeth are decreasing from the first tooth (which has one of the flanks with the highest height large) if one traverses the second mobile in the direction F1 indicated in Figures 2 and 3. The second tooth 320 is between the first 310 and the third 330.

In the case (not shown) where the second reference 30 comprises a single group of three teeth, it also comprises a toothless zone. In other words, the gear of the second gear is "discontinuous" because it is not present along the entire edge of the second gear. In other words again, the pitch of the second reference is not always constant. For example, the second reference 30 includes a first step

(that which separates the first tooth from the second and possibly the second from the third, and which corresponds substantially to the pitch of the toothing of the first mobile) and a second step (that between the flank 311 of the first tooth which is not consecutive to a flank of the second tooth, and the flank of the third tooth which is not consecutive to the flank of the second tooth) greater than the first step, for example at least five times larger than the first step.

Those skilled in the art will understand that this group of teeth could comprise an integer number N of teeth having decreasing heights, and separated by a pitch that corresponds substantially to the pitch of the toothing of the first mobile. However, this group of teeth must not cover the entire perimeter of the second return 30, to leave space to allow a cooperation of the first tooth 310 with the teeth 201 of the second display unit 2 (the date ring for example), which has a toothing different from that of the first mobile display.

[00104] In yet another variant (not shown), the second reference 30 of the timepiece according to the invention comprises at least two groups of teeth, preferably at least two groups of N tooth (s) each. For example in the variant of Figures 1 to 4, the second reference 30 comprises three groups of teeth. In this variant, these three groups teeth are equidistant from each other (12071207120 °).

However, the equidistance is not essential and other dispositions of these three groups of teeth could be imagined (for example

11071307120 °). These groups of teeth are separated from each other by a zone devoid of teeth 302.

In the variant illustrated in Figures 1 to 4, each group of three teeth comprises teeth which are all different from each other. This characteristic can be generalized to any number of groups of teeth, each group of teeth comprising all different teeth, for example because they have at least one different height.

In the variant illustrated in Figures 1 to 4, the toothless zone 302 of the second reference 30 is substantially straight. Alternatively, it could be concave or convex. It could also be rectilinear between the first and second groups of teeth, and concave or convex between the second and third groups of teeth.

In a preferred embodiment, the first display member 1 is a jumping display member, for example a jumping needle which indicates the time of a second time zone. Indeed the correction mechanism according to the invention, which does not allow instant correction of an indication since the position of the first tooth 310 of the second reference is random when it is in contact with the first display unit 1, is adapted to a jumping display member, since its correction is done in discrete increments since when the second reference meets the first display mobile, both have a random angular position.

The second 30 of the mechanism according to the invention is preferably manufactured by Liga (Lithography, Galvanoformung, Abformung). It can alternatively be manufactured by other manufacturing processes. Reference symbols used in the figures

1 First mobile display

2 Second mobile display

3 Mobile Walkman

30 Second referral

40 First referral

50 Axis of mobile

60 Winding stem

62 Crown of the winding stem

70 Hours wheel of a second time zone

80 sliding gear

90 Intermediate wheel

102 Background of the first mobile display

110 tooth of the first mobile display

111 First flank of the tooth of the first display mobile

112 Second flank of the tooth of the first display unit 200 Display of the second display unit

202 Background of the second mobile display

210 tooth of the second mobile display

211 First flank of the tooth of the second mobile display

212 Second flank of the tooth of the second mobile display

301 Area with second return teeth

302 toothless area of the second cross-referral

310 First tooth of the second reference

311 First flank of the first tooth of the second reference

312 Second flank of the first tooth of the second reference

320 Second tooth of the second reference

330 Third tooth of the second reference

1000 Watch

P1 No teeth of the first mobile display

P2 No teeth of the second mobile display

P3 First step of the second referral

P4 Second step of the second referral

F1 First direction of rotation F2 Second direction of rotation

H1 Height of sidewall 311

H2 Height of the sidewall 312

r Radius of the first mobile display

C1 Center of rotation of the first mobile display

C3 Center of rotation of the second reference

A1 Axis of symmetry of tooth 110

A2 Axis of symmetry of tooth 320

A3 Axis of symmetry of tooth 330

Claims

claims

1. Timepiece comprising:

a first display mobile (1) driving via a first toothing a first display member for providing a first indication, - a second display mobile (2) driving via a second toothing different from the first a second member display to provide a second indication,

a mechanism for correcting both the first indication and the second indication, the correction mechanism comprising:

- a winding stem (60),

- A sliding pinion (80) carried by said winding stem (60),

a walkman (3) comprising:

a first reference (40) belonging to a first stage of said mobile device, and

a second reference (30) belonging to a second stage of said mobile device (3), different from said first stage,

said first reference (40) being driven by said sliding pinion (80) so that, in the direction of rotation imposed on the first return (40) via the winding stem, the traveling mobile (3) is moved in a first position where the second reference (30) drives the first display unit (1) by rotating in a first direction of rotation (F1), and in a second position where the second reference (30) drives the second display unit ( 2) by turning in a second direction of rotation (F1) opposite to the first,

characterized in that

said second reference (30) comprises a tooth (310), said tooth (310) being asymmetrical.

2. Timepiece according to claim 1, said tooth (310)

comprising a first sidewall (311) and a second sidewall (312),

the teeth of the first display unit (1) comprising a third sidewall (111) and a fourth sidewall (112), said first sidewall (311) being arranged to cooperate with the third sidewall (111) so as to drive the first sidewall (111); mobile display (1),

the teeth of the second mobile display (2) comprising a fifth sidewall (211) and a sixth sidewall (212), said second sidewall (312) being arranged to cooperate with the sixth sidewall (212) so as to drive the second mobile display (2).

3. Timepiece according to claim 2, said first and second flanks (311, 312) having different heights (H1, H2).

4. Timepiece according to one of claims 2 or 3, the second flank (312) being substantially perpendicular to a bottom (302) of the

second reference (30).

5. Timepiece according to one of claims 1 to 4, said tooth (310) being a first tooth, said first tooth being (310) being followed by a second tooth (320), to improve the torque transmission. the part of the second return (30) to the first display unit (1) and / or prevent blocking and / or breakage of one or more components of the timepiece.

6. Timepiece according to claim 5, the pitch (P3) between the first tooth (310) and the second tooth (320) being substantially equal to the pitch (P1) of the toothing of the first display mobile (1). .

7. Timepiece according to one of claims 5 or 6, said second tooth (320) being symmetrical.

8. Timepiece according to claim 7, the height of the second tooth (320) being smaller than the height (H1) of the highest side of the first tooth.

9. Timepiece according to one of claims 7 or 8, the height of the second tooth (320) being substantially equal to the height (H2) of the smallest side of the first tooth (310).

10. Timepiece according to one of claims 5 to 9, said second tooth (320) being followed by a third tooth (330), adapted to further improve the transmission of torque from the second reference (30) to first display mobile (1).

11. Timepiece according to claim 10, the third tooth (330) being symmetrical.

12. Timepiece according to one of claims 10 or 11, the pitch between the second tooth (320) and the third tooth (330) being substantially equal to the pitch between the first tooth 310 and the second tooth (320).

13. Timepiece according to one of claims 5 to 12, the first tooth (310), the second tooth (320) and if the third tooth (330) forming a group of teeth, the second reference comprising a single tooth group of teeth.

14. Timepiece according to one of claims 5 to 13, the second reference (30) comprising at least two groups of teeth, preferably equidistant.

15. Timepiece according to one of claims 1 to 14, the first display member being a jumping display member.

16. Watch comprising a timepiece according to one of the

Claims 1 to 15.