CH703361A2 - Movement clock having chronograph functions and account-a-down. - Google Patents

Abstract

The invention relates to a watch movement having first and second functions, chronograph and countdown according to a preferred embodiment, comprising a display mobile (8) intended to ensure the movements of a body of display in a first direction of rotation when activating the chronograph function and in a second direction of rotation when activating the countdown function. The movement comprises a selection member (30) movable between first and second positions associated with opposite directions of rotation of said display unit, depending on whether a count-down timer (54) has a value to be counted predefined or not.

Description

Technical area

The present invention relates to a watch movement having first and second functions implementing the display of at least first and second information.

More specifically, the movement according to the invention comprises a finishing train and a mobile display for ensuring the movement of a display member. The watch movement comprises a mechanism associated with one of the first and second functions and capable of having at least one predefined state associated with at least one value of the corresponding information, as well as a selection member that can be moved between at least first and second positions respectively associated with the first and second functions and, corresponding to the establishment of respective first and second kinematic links, between the work train and the display unit, giving rise to opposite directions of rotation. and / or at different speeds of rotation of the display mobile.

According to a preferred embodiment, the first and second functions are chronograph and countdown functions, the display mobile being intended to ensure the displacements of the display member in a first sense. when activating the chronograph function and in a second direction when activating the countdown function. In this case, the mechanism advantageously comprises a count-down counter capable of storing a count-down value to be counted down, while the first and second positions of the selection member are associated with directions of rotation. different from the mobile display.

State of the art

[0004] Watch movements of this type are already known. International Patent Application Publication No. WO 02/077725 A1 provides an example.

The corresponding clock movement comprises an inverting wheel mounted on a first latch and arranged in permanent engagement with a second wheel, itself mounted on a second latch and permanently engaged with a third wheel fixed axis and driven from the finishing gear. The angular positions of the two flip-flops are controlled from the same column wheel, depending on whether the chronograph function or the countdown function is selected by the user. In a first position of the column wheel, only the inverting wheel meshes with a counter wheel seconds to drive in a first direction of rotation. In a second position of the column wheel, only the second wheel meshes directly with the same wheel of seconds counter, to drive the latter in the opposite direction.

Thus, this document proposes to control the movements of a seconds display needle, at the choice of the user, either clockwise, in connection with a chronograph function, or in the counterclockwise direction, in relation to a countdown function.

Disclosure of the invention

A main object of the present invention is to provide an alternative to known watch movements, having at least two functions in which the transition from one to the other function must be controlled by a user, proposing a movement watchmaker in which the choice of the active function is dictated by the state of the watch movement itself.

For this purpose, the present invention relates more particularly to a watch movement of the type mentioned above, characterized in that it is arranged to act on the selection member so that the latter is positioned in the first position, associated with a first function, when the mechanism is in its predefined state, and in the second position, associated with the second function, when the mechanism is in another state.

In the preferred embodiment, in which the functions are chronograph and countdown functions, the predefined state is advantageously associated with a predefined value of the count-down counter, preferably at a predetermined time. value to be counted zero.

Thanks to these characteristics, the corresponding timepiece does not require an external control member to select the function to be activated, between the chronograph and countdown functions. In fact, a function activation control unit is sufficient since, as soon as the countdown counter has a non-zero counting value, the function activation causes the countdown timer to be started. . On the other hand, if the value to be counted down is zero, the chronograph function is activated.

According to this preferred embodiment, the first and second kinematic links advantageously have an odd difference in number of constituent mobiles, preferably equal to one.

Preferably, the watch movement comprises a control member associated with the counter-countdown timer and arranged to control the positioning of the selection member. Thus, it is also possible to provide that the control member is arranged so as to control the passage of the selection member from its first to its second position, to modify the direction of rotation of the display member, when the countdown function is active and the value to be counted down, by the countdown counter, takes a predefined value, preferably zero.

With these features, the watch movement according to the preferred embodiment of the invention is particularly advantageous in the context of use in regatta, for example. Indeed, the start of a regatta is given by means of a countdown. The watch movement according to the invention not only makes it possible to count down the remaining time before the start of the race, but it also makes it possible to measure the race time as soon as it leaves, that is to say directly after the account counter has gone to zero.

More particularly, it can be provided that the control member comprises a cam comprising a finger arranged to act on a first end of a rocker, pivotally mounted on a frame member of the watch movement, to rotate the latter, the flip-flop comprising a second end arranged to control the changes of position of the selection member.

In addition, the selection member may advantageously comprise an oscillating mobile comprising a first gear, arranged in permanent engagement with a mobile kinematically connected to the work train, and a second gear, capable of being moved between first and second positions in which it is, respectively, engaged with a wheel of a first mobile link and with a wheel of a second mobile link, each of the linkage comprising a connecting wheel arranged in permanent engagement with the wheel link of the other mobile link, one of the connecting mobile further having a permanent kinematic link with the mobile display.

In addition, a clutch rocker can be pivotally mounted on a frame member of the watch movement, between first and second positions, the clutch rocker being able to move from one to the other position in position. response to a predefined action of a user and comprising a control surface arranged to cooperate with the selection member, in particular for arranging it in a third neutral position, in which the first and second kinematic links are both inactive.

Furthermore, the watch movement according to the invention preferably comprises a first source of mechanical energy arranged to maintain the oscillations of a time base and is characterized by the fact that it comprises an additional source of mechanical energy for supplying energy to a display mechanism of the countdown minutes, controlled by the count-down counter, and at least one additional control member arranged to change the value to be counted down by the count-down counter in response to a predefined action of a user. The additional control member is then advantageously arranged in such a way that an action by the user to increase the value to be counted by the count-down counter simultaneously provides energy to the mechanical energy source. additional.

Thanks to these characteristics, the progress of the work train is poorly disturbed by the drive of the display mechanism minutes countdown. In addition, it is not necessary to provide a specific mechanism for reassembly of the additional mechanical energy source insofar as the programming of the value to be counted simultaneously ensures its charge.

Advantageously, a change in the value to be counted can be performed "on the fly", in one direction or the other, that is to say, even when the count-down function is active, thanks to the use, for example, of a differential gear.

In addition, an exhaust-type mechanism may advantageously be provided to control the movements of the display mechanism of the minutes of count-to-countdown.

Brief description of the drawings

Other features and advantages of the present invention will appear more clearly on reading the detailed description of a preferred embodiment which follows, with reference to the accompanying drawings given by way of non-limiting examples and in which :

- fig. 1 shows a simplified perspective view of a watch movement according to a preferred embodiment, dial side;

[0023] - FIG. 2 shows a simplified perspective view of the watch movement of FIG. 1, bridge side;

[0024] - FIG. 3 is a partial simplified perspective view of the watch movement of FIGS. 1 and 2, dial side;

[0025] - FIG. 4 is a perspective view of a constructional detail of FIG. 3, side bridges;

[0026] - FIG. 5 is a cross-sectional view of the constructional detail visible in FIG. 4, and

[0027] - FIG. 6 shows a partial simplified perspective view of the watch movement of FIGS. 1 and 2.

Mode (s) of realization of the invention

Figs. 1 and 2 show simplified general views, in perspective, of a watch movement 1 according to a preferred embodiment of the present invention, respectively on the dial side and on the bridge side.

The frame elements (platinum and bridges) of the watch movement 1 have not been represented, while some constituent elements have been made transparent, for clarity.

The watch movement 1 is arranged to allow the display of the current hour and minute by means of a wheel hours 2 and a roadway 3, connected by a timer 4, in a conventional manner.

A mobile, located substantially at nine o'clock and kinematically connected to the work train comprises an axis 6 for carrying a small seconds hand of the current time.

Furthermore, the watch movement 1 comprises a chronograph mechanism for driving mobiles 8 seconds, minutes 9 and 10 hours timed.

The watch movement 1 also comprises a count-down mechanism intended to drive the seconds mobile 8, as well as two disks 11 and 12 for displaying minutes and tens of minutes of count-downs, visible through a window of the dial (not shown). The minute display disc 11 carries indications ranging from 0 to 9, while the display disc 12 tens of minutes carries indications ranging from 0 to 9, and an additional empty slot. An arm 14 carrying a mask 15 is arranged to be disposed facing the window when the value to be counted by the countdown mechanism is zero.

The watch movement 1 comprises a main mechanical energy source, illustrated here in the form of a barrel 16, intended to maintain the oscillations of a sprung balance 18 associated with an anchor escapement, via of a finishing train 19. The latter comprises in particular a center mobile 20, a mobile 21 average and a mobile seconds 22. Note that the axis 6 of the small second is driven from the wheel of the mobile average 21.

Conventional manual and automatic winding trains (not shown) are provided to recharge the spring of the barrel 16.

One of the main features of the watch movement 1 lies in the fact that the chronograph and countdown mechanisms are intimately related to each other, as will be apparent from the detailed description of the figs . 3 and 4 which follows.

FIG. 3 represents a simplified partial perspective view of the watch movement 1 on which elements involved both in the implementation of the chronograph function and in that of the countdown function have been represented. Fig. 4 is a perspective view of a constructional detail of FIG. 3, side bridges, while fig. 5 is a cross-sectional view of the constructional detail of FIG. 4.

The watch movement 1 comprises a selection member 30 comprising a first arm 31 carrying, towards its end, a shaft 32 which are secured to an oscillating pinion 33 and a pinion 34 arranged in permanent engagement with the wheel of the mobile. seconds 22.

The selection member is pivotally mounted on a frame member of the movement to allow the pinion 33 to oscillate between two extreme positions. The first arm is part of an upper stage, with a selection function, comprising a second arm 36 extending in a direction substantially perpendicular to that of the first arm and whose function will be explained later.

The selection member comprises a second stage, lower and positioning function, carrying an eccentric 37 whose head cooperates with a fork 38 of the upper stage to allow to precisely adjust the relative angle between the two floors. Furthermore, the lower stage also has a recess 39 substantially V-shaped and intended to cooperate with an elastic element 40 having substantially the shape of a jumper and carried by a selection rocker 41.

The latter is pivotally mounted on a frame member of the watch movement between two extreme angular positions, by a tenon (not visible) located near a first of its ends, one of the extreme positions being associated with the chronograph function and the other to the countdown function. A spring 43 is provided to define a default position of the selection flip-flop, exerting on it a force tending to turn it counter-clockwise in FIG. 3, to place it in the position associated with the countdown function as will be explained later.

The rotations of the selection lever 41 are transmitted to the selection member 30 via the jumper 40.

The first arm 31 of the selection member 30 has a spout 44 for cooperating with a recess 45, substantially V-shaped, a clutch rocker 46 pivotally mounted on a frame member of the watch movement 1. When the spout 44 cooperates with the recess 45, the selection member is held fixed in a central position located substantially midway between its two extreme positions, as shown in the figures.

Furthermore, the second end of the selection flip-flop ends with a finger 47 arranged to carry a control member having the shape of a cam 48. The latter also carries a finger 49 arranged to act on the finger 47 of the selection rocker to rotate in the clockwise direction, against the force exerted by the spring 43. More specifically, when the cam 48 rotates counterclockwise in FIG. 3et fingers 47 and 49 come into contact, the selection rocker is pushed in the clockwise direction, that is to say in the direction of its position associated with the chronograph function. In other situations, the selection rocker is pushed in the anti-clockwise direction by its spring 43, that is to say in the direction of its position associated with the count-down function. Note that outside the finger 49, the periphery of the cam 48 does not cooperate with the latch 41.

It appears from FIGS. 1 and 3 that the cam 48 is coaxial with a pinion 50 integral with the disk tens of minutes 12 and by which the drive of this disk is ensured. A pin 52 is housed in a hole of the pinion and cooperates with the ends of an elongate recess 53 formed in the cam 48 as a function of the direction of rotation of the pinion 50, in particular so that the cam does not act on the latch 41 when it rotates in the clockwise direction.

On the one hand, it will be noted that a rotation of the cam 48 in the clockwise direction in FIG. 3corresponds to an increase in the value displayed by the disk 12. On the other hand, it will also be noted that the cam 48 is indexed relative to the disk 12 in such a way that the fingers 47 and 49 come into contact with one of the another when the disc 12 rotates to go from the display of the empty slot to the display of 0 in the window or vice versa. At the same time, the disc 11 minutes is driven to pass from 9 to 0 or vice versa, because of the relative indexing of the two discs 11 and 12 and their drive mechanism.

Indeed, a drive wheel 54, large date type, is provided to drive the pinion 50 of the disk 12 and a pinion 56 secured to the disk 11 minutes. The drive wheel 54 comprises two superimposed boards, one of three teeth 57, for driving the pinion 50, and one of thirty teeth 58, for driving the pinion 56, so that the disc 12 takes a step while that disc 11 makes ten.

Thus, starting from the configuration illustrated in the figures, when the count-down counter is incremented, that is to say when the disks 11 and 12 are driven to pass, respectively, from 9 to 0 and from the empty location to 0, the cam 48 rotates clockwise and tends to place the selection flip-flop in its position associated with the countdown function.

At this time, the jumper 40 exerts a force on the selection member 30 tending to rotate in the anticlockwise rotation direction in FIG. 3from its central position. However, initially, the selection member remains stationary in its central position, because of the cooperation of its nose 44 with the recess 45 of the clutch lever 46.

Conversely, when the countdown function is active and the value to be counted down becomes zero, the disk 12 tens of minutes turns to go from the display of 0 to the empty slot. The cam 48 is then driven in the anti-clockwise direction of rotation and moves the selection rocker 41 in its position associated with the chronograph function, through the fingers 47 and 49, by rotating it clockwise. The cam 48 then stops, since the disk 12 is no longer driven, and the finger 49 maintains its pressure on the finger 47 to immobilize the selection rocker in this position.

The clutch rocker 46 comprises a finger 60 arranged to cooperate with the columns of a column wheel 62, whose angular positioning is controlled by the actions of a user on an external control member, by the intermediate of a command 63 acting on its ratchet 64. Thus, with each new pressure on the external control member, the finger 60 passes from a column to a vacuum between two columns and vice versa. The angular positions of the column wheel 62 are conventionally defined by the cooperation of a jumper 65 with the teeth of the ratchet 64.

The recess 45 cooperates with the nozzle 44 when the finger 60 is located in a vacuum between two columns. When the column wheel is rotated by one step, one of its columns raises the clutch rocker 46, going against the force exerted by a spring 66 acting on the clutch rocker, which allows to clear the spout 44 of the recess 45 and thus to release the selection member. At this moment, the latter is no longer subject to the force that the jumper 40 exerts on it and takes one of its extreme positions, depending on the configuration of the selection lever 41.

The first arm 31 of the selection member is disposed between two connecting mobiles 67 and 68, one chronograph and the other countdown.

The chronograph link mobile 67 comprises a drive wheel 69, intended to cooperate with the oscillating pinion 33, and a connecting wheel 70. The countdown-counting mobile device 68 comprises a gear wheel. drive 72, intended to cooperate with the oscillating pinion 33, a connecting wheel 73, and a transmission wheel 74 arranged in permanent engagement with the wheel of the seconds mobile 8.

The connecting wheels 70 and 73 are arranged in mutual mutual engagement.

As a result, it appears from FIGS. 3 to 5 that the rotational movement of the fixed gear 34 can be transmitted to the seconds handpiece 8 in one direction or the other, depending on whether the oscillating gear 33 is engaged with the drive wheel 69 of the linkage linkage chronograph or with the drive wheel 72 of the countdown connection mobile.

In one case, the movement is retransmitted directly from the drive wheel 72 to the transmission wheel 74, while in the other case, it is retransmitted to the drive wheel 74 via the two linking wheels 70 and 73, so as to ultimately reverse the direction of rotation of the seconds mobile 8 relative to the first case.

It appears, therefore, that the mobile seconds 8 can be driven in the clockwise direction, in a first position of the cam 48 associated with the chronograph function, or in the anti-clockwise rotation direction in a second position of the cam 48 associated with the countdown function.

In each position of the selection member 30, its second arm 36 is disposed in abutment against an eccentric 75 for adjusting the penetration of the toothing of the oscillating pinion 33 with each of the drive wheels 69 and 72.

The mobiles minutes 9 and 10 hours timed are driven in a conventional manner from a flexible finger 76 carried by the mobile seconds 8 and through adapted gear wheels. Each of these wheels comprises a mobile whose angular position is stabilized by means of a jumper. The flexible finger 76 has a shape and a stiffness constant such that it allows to rotate the mobile minutes and hours timed only clockwise. Thus, these mobiles are not driven when the countdown function is activated, their angular stability being ensured in this case by their jumper.

To maintain fixed the mobile seconds 8, in certain situations, especially if a countdown is stopped during measurement, a brake 78 is provided, the latter acting on the drive wheel 72 of the mobile link of the account. countdown having a permanent kinematic link with the seconds handpiece 8.

Note that the clutch rocker 46 carries a pin 79 arranged to act on the brake 78 when the clutch rocker is raised by the column wheel, so as to release the mobile seconds 8 when one chronograph or countdown functions are activated.

It follows from the foregoing description that a single external control member acting on the control 63 is sufficient to activate or stop the chronograph function, when the value to be counted by the countdown mechanism is zero, or the countdown function when this value is not zero.

As regards the resetting of the chronograph counters, provision is made to provide each of the corresponding mobiles with a core cam 80, 81, 82 arranged to cooperate with a reset hammer 84, 85, 86.

The hour hammer 86 carries a pin 88 arranged to act on the other two hammers and retain them in the high position when the hour hammer is in the up position. The latter also carries an actuating pin 89 intended to be released by an action on an external reset member to lower the hour hammer 86. A spring type (not visible) of conventional type is provided to retain this pin in the upper position of the hammer hours 86. Moreover, the latter also has a spout 90 arranged to cooperate with the columns of the column wheel 62, firstly, to lift all the hammers when starting the chronograph or countdown timer and, on the other hand, to prevent them from going down when the chronograph function or the countdown function is active.

A spring 92, 93, 94 is associated with each of the hammers to exert on it a force tending to push it towards its low position.

Note that the hammer hours 86 carries an additional pin 96 cooperating with a lever 97, integral in rotation of the brake 78, to lift the latter and release the mobile seconds 8 during resetting operations.

Now that the operation of the counting mechanisms of the chronograph and countdown functions has been described, the display mechanism of the count-down will be described in relation to FIG. 6, which represents a partial simplified perspective view of the watch movement of FIGS. 1 and 2.

The display mechanism countdown comprises an additional barrel (not visible) whose spring has a fixed first end of the drum, and a second end integral with the barrel shaft 101. The latter is shaped so as to define an axis for the two boards of the drive wheel 54, these elements being all integral in rotation.

Furthermore, the drive wheel 54 is arranged in permanent engagement with an output gear 102 of a differential gear 103.

The latter has a first input wheel 104 retained in its rotational movement from the work train of the watch movement 1, through a device which will be described later. The differential gear has a second input wheel 106 rotated from an additional control member 107.

The additional control member 107 comprises a rocker having two pins 108 and 110 intended to be actuated by two different external control members, one for incrementing the count-down counter and the other for the decrement.

For this purpose, the two pins are arranged on either side of the pivot axis 111 of the rocker 107, the latter carrying a toothed rake 112 arranged in engagement with a pinion 114 of the gear count-to -revours, to rotate it in one direction or the other, depending on the pin actuated.

The pinion 114 is integral in rotation with two springs 116 and 117, each having a spout disposed near a reference 118, to rotate the latter in a predefined direction. An elastic member or spring 120 is provided to return the latch to its central position after actuation by a user.

When one of the pins 108 or 110 is actuated, the rake 112 rotates the pinion 114 in one direction or the other. One of the springs causes the return, the other spring turning away from it, while the active spring is retracted by elastic deformation when the rocker 107 is released and the rake returns to its central position under the effect of the action of the spring 120. When the other pin is actuated, it is the other spring that acts on the return 118.

Thus, each pressure exerted on the pin, intended to increment the counter-countdown counter, induces a rotation of a pitch of the minute disc 11 in the clockwise direction, through the gear wheel. countdown, including via the second input wheel 106 of the differential gear 103. The display disc 12 tens of minutes advances in the clockwise direction of one step every ten pressures. Conversely, each pressure on the other pin causes a rotation of a pitch in the anti-clockwise rotation direction of the minute display disk 11.

Note that, in order for the countdown function to be used, it is necessary to increment the corresponding counter by two steps, so that the minute display disc 11 moves from the position 9 to the position 1 (minute).

Furthermore, this construction offers the additional advantage of reassembling the spring of the additional cylinder 100 directly by programming the value to be counted by the countdown mechanism via the drive wheel 54. It is not necessary to provide a specific winding mechanism. The spring of the additional barrel 100 is preferably placed in its drum so as to have a slight prestressing when the value to be counted is zero.

Countdown countdown is implemented on the basis of the information provided by the gear train and through the first input wheel 104 of the differential gear 103.

For this purpose, it is arranged in engagement with an exhaust pinion 122, secured to an additional escape wheel 123.

The latter cooperates with two nozzles 124 formed on an additional rocker 126 to define an anchor. The flip-flop 126 is pivotally mounted on a frame element of the watch movement 1 by an axis of rotation 128 situated between the two spouts 124.

A spring 127 ensures the proper positioning of the additional rocker 126, tending to rotate in the anti-clockwise rotation in FIG. 6.

The latch has a probe 130 for cooperating with a cam 132 integral in rotation of the mobile seconds 8 and whose periphery has the shape of a spiral. Thus, when a countdown is in progress, the cam 132 progressively raises the additional rocker 126 to a predefined time, when the probe approaches the largest radius of the cam. At this moment, the nozzle 124 closest to the cam releases the escape wheel 123 which is then very quickly blocked by the other nozzle 124, without having time to advance one step. As the cam continues to rotate, the probe reaches the highest point of radius and falls on the part of the cam with the smallest radius. In doing so, the rocker rotates and the spout 124 which ensures the locking of the escape wheel 123 releases it so that it advances one step before being again blocked by the nozzle 124 closest to the cam 132 .

The escape wheel 123 therefore advances one step per minute, that is to say, each complete turn of the wheel of the second mobile 8, and advances the drive wheel 54 of a step in the direction of clockwise rotation in FIG. 6, via the first input wheel 104 of the differential gear 103.

The latch comprises a first end shaped finger 134 arranged to cooperate with the finger 49 of the cam 48.

When the value to be counted is zero, the cam 48 exerts a force on the additional rocker 126 such that it is held in its extreme position in the clockwise direction of rotation. In this position, one of the nozzles 124 locks the escape wheel 123, while the probe 130 is located out of reach of the cam 132 to avoid any collision in case of activation of the chronograph function.

When the value to be counted is non-zero, the additional rocker 126 is released by the cam 48 and moves under the effect of the stresses it undergoes, on the one hand, its spring 127 (FIG 1) and, on the other hand, cam 132.

Note that the second end 135 of the additional rocker 126 is located near a pin 136 carried by the seconds resetting hammer 84, so that the probe 130 can be placed out of range of the cam 132 during reset operations.

Also, when the external start control member is actuated, starting from a stopped state of the chronograph and countdown functions, the countdown counter is programmed to count a value of N minutes. , the hammers 84, 85, 86, the brake 78 and the clutch rocker 46 are raised while the selection member 30 is released to move into its countdown position, the additional rocker 126 being also released. Therefore, from the start, the escape wheel 123 advances one step, the minute display disc 11 directly to the display of the value N-1 while the mobile seconds 8 begins to count down the N-1 minutes and 60 seconds of the value programmed for the countdown.

At the end of this count, without action of the user, the movement automatically switches from the countdown mode to the chronograph mode and the mobile seconds 8 changes direction of rotation, following the pivoting of the cam 48.

Furthermore, it will be noted that a particular control mechanism of the arm 14 carrying the mask 15 is provided to position it opposite the window or outside the window provided in the dial for the display of the minutes of account-to- countdown. This mechanism is visible in FIG. 1.

More specifically, the arm 14 carries a pin 140 arranged to cooperate with a slot 141 formed at the empty location of the display disk 12 tens of minutes. At the same time, a spring 142 is provided to apply on the arm 14 a force tending to hold the pin 140 abutting against the disc 12.

When the value to be counted is zero, the pin 140 is housed in the slot 141. When the count-down counter is incremented, the disk 12 rotates, at least one step, in the direction of rotation time and moves the arm 14 in the same direction, thus clearing the window to reveal the indications on the discs 11 and 12.

When the disc 12 rotates further (that is to say that the value to be counted reaches several tens of minutes), the arm 14 rotates further, possibly to a point where the pin 140 comes out of the slot 141 to rest on the periphery of the disc 12.

When counting the countdown, the disk 12 rotates in the anti-clockwise direction and, at a given moment, the pin 140 engages again in the slot 141, then back up to in its position shown in FIG. 1, when the value to be counted reaches 0.

With these characteristics, it is sufficient to a quick glance to the user to know if a value is programmed or not in the counter-countdown timer. The mask 15 preferably has indications that are clearly different from the indications on the discs 11 and 12. There is illustrated here, by way of nonlimiting example, a green triangle and a red rectangle, both on a black background, so as to easily see if the value to be counted is null or not.

The foregoing 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 features which have just been described, as for example the number of chronograph counters or their arrangement, or the shapes and arrangements specifically illustrated and described for the various levers, rockers or hammers.

The skilled person will not encounter any particular difficulty to adapt the content of the present disclosure to his own needs and implement a watch movement that only partially meets the characteristics that have just been presented, without leaving of the scope of the present invention. Note for example that the display members could have a different shape without departing from the scope of the invention. Indeed, the use of display disks minutes countdown is not absolutely essential to the implementation of the present invention. In addition, it is of course possible to provide that the watch movement has only one display disc minutes countdown.

Similarly, the skilled person will not encounter any particular difficulty to adapt the drive mechanism or the display organs minutes countdown to his own needs, without departing from the scope of the present invention. The drive mechanism described is particularly suitable for carrying out the driving of display members having a large inertia and is therefore not essential if, for example, conventional needles are used instead of the disks.

Claims (12)

1. watch movement, having first and second functions implementing the display of at least first and second information, comprising a work train (19), a display mobile (8) intended to ensure the displacements of a display member, a mechanism (54) associated with one of said first and second functions and capable of having at least one predefined state associated with at least one value of said corresponding display information, a selector member (30) movable between at least first and second positions respectively associated with the first and second functions and corresponding to the first and second respective kinematic links (33, 67, 68), between said finishing train and said display unit, giving rise to opposite directions of rotation and / or to different speeds of rotation of said display unit, characterized in that it is arranged to act on said selector member (30) so that the latter is positioned in said first position, associated with a first function, when said mechanism is in said predefined state, and in said second position, associated with the second function, when said mechanism is in another state. 2. watch movement (1) according to claim 1, having chronograph and countdown functions, characterized in that said display mobile (8) is intended to ensure the displacements of the display member in a first direction of rotation during the activation of the chronograph function and in a second direction of rotation during the activation of the countdown function, said mechanism comprising a count-down counter (54) capable of storing a count-down value to be counted down, said first and second positions of said selector member (30) being associated with opposite directions of rotation of said display unit, and in that it is arranged to act on said selection member (30) so that the latter is positioned in said first position, associated with the chronograph function, when said countdown counter has a value to count down zero, and in said second position, associated with the count-down function, when said countdown counter has a non-zero counting value. 3. watch movement (1) according to claim 2, characterized in that said first and second kinematic links (33, 67, 68) have an odd difference in number of constituent mobiles. 4. watch movement (1) according to claim 2 or 3, characterized in that it comprises a control member (48) associated with said counter-countdown timer (54) and arranged to control the positioning of said organ of selection (30). Clock movement (1) according to claim 4, characterized in that said control member (48) is arranged to control the passage of said selection member (30) from said second position to said first position, to modify the the direction of rotation of the display member when said countdown function is active and said value to be counted down by said count-down counter (54) reaches a zero value. 6. watch movement (1) according to claim 5, characterized in that said control member comprises a cam (48) comprising a finger (49) arranged to act on a first end (47) of a selection flip-flop (41). pivotally mounted on a frame member of the watch movement to pivot the watch movement, said selection lever carrying an actuator (40) arranged to control the position changes of said selection member (30). 7. watch movement (1) according to claim 6, characterized in that said selection member (30) comprises an oscillating mobile (32, 33, 34) comprising a first pinion (34) arranged in permanent engagement with a mobile (22). ) kinematically connected to said work train and a second gear (33) movable between first and second positions in which it is respectively engaged with a wheel (69) of a first linkage (67) and with a wheel (72) of a second connecting mobile (68), each of said connecting mobiles comprising a connecting wheel (70, 73) arranged in permanent engagement with the connecting wheel of the other connecting mobile, one of said link mobiles (68) further having a permanent kinematic link with said display mobile (8). 8. watch movement (1) according to claim 7, characterized in that it comprises a clutch rocker (46) pivotally mounted on a frame member of the watch movement, between first and second positions, said clutch rocker being able to move from one to the other position in response to a predefined action of a user and comprising a control surface (45) arranged to cooperate with said selection member (30), in particular to arrange it next a third neutral position in which said first and second kinematic links (33, 67, 68) are both inactive. 9. watch movement (1) according to any one of claims 4 to 7, comprising a first source of mechanical energy (16) arranged to maintain the oscillations of a time base (18), characterized in that it comprises an additional mechanical energy source (100) for supplying power to a countdown minutes display mechanism (11, 12) controlled by said count-down timer (54) and at least one additional controller (107) arranged to change the value to be counted down by said count-down counter (54) in response to a predefined action of a user, said additional controller being also arranged such that an action by the user to increase the value to be counted down by said countdown timer simultaneously provides power to said additional mechanical power source (100). 10. Watchmaking movement (1) according to claim 8, characterized in that it comprises a counting-wheel gear kinematically connecting said display mechanism (11, 12) count-down minutes to the wheel of finishing (19), on the one hand, and said control member (107), on the other hand, and in that said counting gear comprises a differential gear (103) arranged to allow a modification of the value to count down while the countdown function is active. Clock movement (1) according to claim 9 or 10, characterized in that said additional control member comprises a rocker (107) having two receiving surfaces (108, 110) intended to be actuated from external commands, one for incrementing said count-down timer (54) and the other for decrementing it, said receiving surfaces being disposed on either side of a pivot axis (111) of said rocker (107), the latter carrying a rake (112) kinematically connected to a mobile (114) of said counting wheel to rotate in one direction or the other. 12. watch movement (1) according to any one of claims 2 to 11, comprising a first source of mechanical energy (16) arranged to maintain the oscillations of a time base (18), and a power source additional mechanical means (100) for supplying energy to a countdown minutes display mechanism (11, 12) controlled by said count-down counter (54), characterized in that said counter-countdown timer is controlled from said time base (18), via an anchor (124, 126) arranged to periodically release an escape wheel (123) including a pinion (122). ) having a kinematic connection with said count-down counter (54) and rotated from said additional mechanical power source (100), said anchor being pivotally mounted on a frame member of the watch movement by being arranged for present r oscillations controlled by the cooperation of a probe (130) carried by it with the periphery of a spiral-shaped cam (132) driven in rotation from said finishing train (19).