EP4273635A1 - Timepiece movement - Google Patents

Abstract

The subject of the present invention is a watch movement comprising an oscillating regulating member (1) intended to regulate a cog of the movement and comprising a movable inertial part (10), a time setting mechanism controlled by a control member operable by a user between a rest position and a time setting position and a mechanism for stopping and restarting the oscillating regulating member (1) intended to stop the oscillating regulating member (1) during setting the time of the movement and restarting said regulating member (1) when the time setting is carried out. The mechanism for stopping and restarting the oscillating regulating member (1) comprises a rocker (3) arranged to pivot between a rest position and a stopping position when the control member is moved from its rest position to its time setting position and a lever (5) comprising a toothed sector (51) intended to cooperate with a corresponding toothed sector (321) of the rocker (3) for the pivoting of the lever (5) between a position rest and a stopping position and an elastic arm (52) arranged to come into contact with the movable inertial part (10) of the oscillating regulating member (1), tangentially thereto, when the lever (5) pivots from its rest position to its stop position.

Description

The subject of the present invention is a watch movement comprising an oscillating regulating member intended to regulate a cog of the movement, a time setting mechanism and a stopping and restarting mechanism making it possible to stop and restart the oscillations of the oscillating regulating organ.

When setting the time of a watch movement, the oscillating regulating member is generally stopped when the time setting stem is pulled. If the escapement mechanism used in the movement is self-starting, there will be no problem when the time setting is completed: the time setting stem is pushed back and the escapement and the oscillating regulating organ restarts. This is the case with classic lever escapement mechanisms.

In the case of a non-self-starting escapement mechanism, such as a detent escapement, it is necessary to provide a device to restart the oscillations of the oscillating regulating member at the end of time setting.

The aim of the present invention is to provide a clock movement comprising a mechanism for stopping and restarting the oscillating regulating member which makes it possible to effectively restart the oscillating regulating member in all cases, whatever the mechanism. associated exhaust, with the largest possible recovery angle while remaining simple and space-saving.

The subject of the present invention is a timepiece movement according to claim 1 as well as a timepiece according to claim 6.

The appended figures schematically illustrate an embodiment of the clock movement according to the invention.

THE figures 1 And 2 illustrate in particular the oscillating regulating member and the mechanism for stopping and restarting a movement thereof according to one embodiment of the invention, the mechanism for stopping and restarting the regulating member oscillating being in its rest position in the figure 1 and in its stopping position in the figure 2 .

The watch movement according to the invention comprises an oscillating regulating member intended to regulate a cog of the movement, a time setting mechanism controlled by a control member operable by a user between a rest position and a setting position on time and a mechanism for stopping and restarting the regulating member controlled by said control member. In the illustrated embodiment, the oscillating regulating member 1 is a sprung balance comprising a balance 10 and a hairspring 11. Alternatively, the regulating member could be an oscillator with flexible guidance.

In the illustrated embodiment, the movement includes a time setting mechanism well known to those skilled in the art and of which only the pull tab 2 is visible. The time setting mechanism and the movements of the pull tab 2 are in particular controlled by a time setting rod not shown.

In the illustrated embodiment, the mechanism for stopping and restarting the sprung balance 1 comprises a rocker 3 pivotally mounted at A on a fixed part of the movement and having a first arm 31 intended to cooperate with the pull tab 2. To do this, the first arm 31 comprises at its end a slot 311 in which a stud 4 fixed on the zipper 2 is housed. Thus, when the zipper 2 pivots, it drives the rocker 3 which pivots in turn. The rocker 3 is arranged to pivot between a first rest position illustrated in figure 1 , which corresponds to the pushed position of the time setting stem (normal operation of the movement), and a stop position illustrated in figure 2 , which corresponds to the pulled position of the time setting stem (setting the time of the movement).

The rocker 3 further comprises a second arm 32 which has teeth 321 at its end.

The mechanism for stopping and restarting the sprung balance 1 also includes a stop lever 5 pivoted at B on a fixed part of the clock movement. The lever stop 5 includes teeth 51 engaged with teeth 321 of the second arm 32 of rocker 3. Thus, when rocker 3 pivots from its rest position to its stopping position, it in turn drives stop lever 5 which also pivots from its rest position to its stop position.

The stop lever 5 further comprises an elastic arm 52 arranged to come into contact with the balance 10 of the sprung balance 1 tangentially thereto. In its rest position, the stop lever 5 is arranged so that its elastic arm 52 is in contact with a pin 6 fixed in the clock movement, said contact generating stress or pre-arming of said elastic arm 52. This preload or this preload, which can be light, makes it possible to compensate for the play in the stopping and restarting mechanism of the oscillating regulating member and therefore makes it possible to prevent the stop lever 5 from moving when it is in its position. rest position.

In normal operation of the movement, the time setting stem is in its pushed position, pull tab 2 is in its rest position. The rocker 3 and the stop lever 5 are therefore also in their respective rest position, the elastic arm 52 of the stop lever 5 being supported with preload on the pin 6. In this configuration, illustrated in figure 1 , the regulating member 1 formed of the balance 10 and the hairspring 11 oscillates, thus regulating a cog of the movement, its oscillations being maintained by an escapement mechanism.

When the user sets the time, the time setting stem is moved to its pulled position. It then moves pull tab 2 to its time setting position. In doing so, the pull tab 2 drives the rocker 3 which pivots into its stopping position taking with it the stop lever 5 thanks to the gearing of the teeth 321 and 51. By pivoting, the elastic arm 52 of the stop lever 5 comes into contact against the balance 10 tangentially thereto. The stopping and restarting mechanism of the regulating member according to the invention is arranged so that, when the stop lever 5 pivots into its stopping position, the elastic arm 52 comes into contact with the balance 10 and drives it. briefly from a certain angle, that we will call raise angle (clockwise in the figure 2 ) before braking it and stopping it completely as soon as the stopping position of stop lever 5 is reached. Preferably, the stop lever 5 is arranged to drive the balance 10 by a restart angle greater than 20°, even more preferably by a restart angle greater than 25° when it pivots from its rest position in its stopping position.

In the stopping position of the stop lever 5 illustrated in figure 2 , regulating organ 1 is stopped and no longer oscillates. The user can then set the time conventionally via the time setting stem.

When the time is set and the user pushes the time setting rod back into its pushed position, the pull tab 2 returns to its rest position and therefore drives the rocker 3 and the stop lever 5 which each pivot to return to their resting position. In doing so, the elastic arm 52 of the stop lever 5 in contact with the balance 10 will, thanks to friction, restart the sprung balance 1 by rotating the balance 10 in the counterclockwise direction in the figures by an angle essentially corresponding at the recovery angle defined above. The oscillating regulating member 1 is restarted and the movement can restart regardless of the escapement mechanism used.

Thus, it is possible to produce a mechanism for stopping and restarting the oscillating regulating member which is controlled by the time-setting rod and the pull-tab and which allows, thanks to the toothed gear between the rocker 3 and the stop lever 5, to multiply the stroke of said lever so that it can restart the regulating member with a significant restart angle. It is thus ensured that the oscillating regulating member restarts after setting the time, regardless of the position in which the movement stopped and regardless of the movement escapement mechanism. The stop lever 5 acts tangentially to the balance 10, which guarantees a simple and space-saving mechanism.

In the illustrated embodiment, the oscillating regulating member is a spiral balance. Alternatively, the regulating member could be of another type, such as a flexible guided oscillator.

In the illustrated embodiment, the oscillating regulating member comprises an inertial part movable in oscillation having the shape of a solid circular balance wheel. Alternatively, the inertial part of the oscillating regulating member could be formed of several circular segments or could have any other appropriate shape.

Generally speaking, the watch movement according to the invention comprises an oscillating regulating member intended to regulate a cog of the movement and comprising a movable inertial part, a time setting mechanism controlled by a control member operable by a user between a rest position and a time setting position and a mechanism for stopping and restarting the oscillating regulating member intended to stop the oscillating regulating member when setting the time of the movement and to restart said regulating organ when the time is set. The mechanism for stopping and restarting the oscillating regulating member is controlled by the control member of the time setting mechanism and comprises a rocker mounted to pivot between a rest position and a stopping position and comprising a toothed sector intended to cooperate with a corresponding toothed sector of a lever. The lever is pivotally mounted between a rest position and a stopping position and comprises an elastic arm arranged to come into contact with the movable inertial part of the oscillating regulating member, tangentially thereto, when the lever pivots from its position. rest position in its stopping position.

• lorsque l'organe de commande est déplacé dans sa position de mise à l'heure, il entraîne la bascule et le levier qui pivotent dans leur position d'arrêt respective ;
• en pivotant dans sa positon d'arrêt, le levier et son bras élastique font pivoter la partie inertielle mobile de l'organe réglant oscillant d'un certain angle, appelé angle de relance, avant de stopper ladite partie inertielle mobile et donc d'arrêter l'organe réglant oscillant ; et de sorte que,
• en ramenant l'organe de commande dans sa position de repos, la bascule et le levier pivotent également pour retrouver leur position de repos et ce faisant, le bras élastique du levier fait pivoter la partie inertielle mobile de manière à relancer les oscillations de l'organe réglant oscillant.

The stopping and restarting mechanism of the oscillating regulating member is arranged so that:

• when the control member is moved to its time setting position, it drives the rocker and the lever which pivot into their respective stopping position;
• by pivoting in its stopping position, the lever and its elastic arm pivot the movable inertial part of the oscillating regulating member by a certain angle, called restart angle, before stopping said movable inertial part and therefore stopping the oscillating regulating organ; and so that,
• by returning the control member to its rest position, the rocker and the lever also pivot to return to their rest position and in doing so, the elastic arm of the lever pivots the movable inertial part so as to restart the oscillations of the oscillating regulating organ.

Preferably, the recovery angel is greater than 20°, more preferably greater than 25°.

Preferably, the elastic arm of the lever is arranged to cooperate in its rest position with a fixed member of the movement so that said elastic arm is pre-stressed against this fixed member in the rest position of the lever.

Claims (6)

Clockwork movement comprising an oscillating regulating member (1) intended to regulate a cog of the movement and comprising a movable inertial part (10), a time setting mechanism controlled by a control member operable by a user between a position rest and a time setting position and a mechanism for stopping and restarting the oscillating regulating member (1) intended to stop the oscillating regulating member (1) when setting the time movement and restarting said regulating member (1) when the time is set, characterized in that the mechanism for stopping and restarting the oscillating regulating member (1) comprises a rocker (3) arranged to pivot between a rest position and a stop position when the control member is moved from its rest position to its time setting position and a lever (5) comprising a toothed sector (51) intended to cooperate with a corresponding toothed sector (321) of the rocker (3) for pivoting the lever (5) between a rest position and a stopping position; by the fact that the lever (5) comprises an elastic arm (52) arranged to come into contact with the movable inertial part (10) of the oscillating regulating member (1), tangentially thereto, when the lever (5 ) pivots from its rest position into its stopping position so that, by pivoting into its stopping position, the lever (5) and its elastic arm (52) pivot the movable inertial part (10) of the oscillating regulating member (1) before stopping said movable inertial part (10) and therefore stopping the oscillating regulating member (1); and by the fact that , by returning the control member to its rest position, the rocker (3) and the lever (5) also pivot to return to their rest position and in doing so, the elastic arm (52) of the lever (5) pivots the movable inertial part (10) so as to restart the oscillations of the the oscillating regulating member (1). Movement according to claim 1, characterized in that the lever (5) is arranged to pivot the movable inertial part (10) by an angle greater than 20°, preferably greater than 25°, when the lever (5) pivots from its rest position to its stop position. Movement according to one of the preceding claims, characterized in that the elastic arm (52) of the lever (5) is arranged to cooperate, in its rest position, with a fixed member (6) of the movement so that said arm elastic (52) is pre-stressed against this fixed member (6) in the rest position of the lever (5). Movement according to one of the preceding claims, characterized in that the oscillating regulating member is a sprung balance (10, 11). Movement according to one of the preceding claims, characterized in that the control member is a time-setting rod actuating a pull-tab (2) to which the rocker (3) is connected. Timepiece comprising a movement according to one of the preceding claims.

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