Timepiece mechanism comprising at least one timepiece member alternately movable between two stable positions

Abstract

The present invention relates to a clockwork mechanism comprising at least one clockwork element arranged to be movable alternately between two stable positions and a drive device (4) for said clockwork element comprising a drive member (6) rotatable in at least one direction and arranged to be able to drive said clockwork element alternately from one to the other of its two stable positions. Said drive device (4) comprises at least one blade (12) integral with said at least one clockwork element, said at least one blade (12) comprising at least one flexible portion (12a) and being mounted to slide along its longitudinal axis in a housing (14a, 14b) of a frame (16) of the clockwork mechanism between a first and a second position corresponding respectively to one of the two stable positions of the clockwork element.The rotating drive member (6) comprises a cam (8) whose outer profile includes at least one protrusion (21) arranged to be in contact with the flexible portion (12a) of the blade (12), said outer profile of the cam (8) and the blade (12) being arranged to cooperate together such that a rotation of the rotating drive member (6) in the same at least one direction successively causes a compression of the flexible portion (12a) of the blade (12) by the cam (8), an instantaneous displacement of the blade (12) in one direction from one of its first and second positions to the other, a compression of the flexible portion (12a) of the blade (12) by the cam (8), and then an instantaneous displacement of the blade (12) in the other direction from one of its first and second positions to the other, so as to move the clockwork mechanism alternately from one of its two stable positions to the other in a movement of instant back and forth.

Description

technical field

[0001] The present invention relates to a clockwork mechanism comprising at least one clockwork element arranged to be mobile alternately between two stable positions and a drive device for said clockwork element comprising a drive element rotating in at least one direction and arranged to be able to drive said clockwork element alternately from one to the other of its two stable positions.

[0002] The present invention also relates to a watch movement comprising such a watch mechanism, as well as a timepiece comprising such a watch mechanism or such a watch movement. State of the art

[0003] Such a mechanism, comprising at least one clockwork element arranged to move alternately between two stable positions, is used, for example, as a display control in a display device for two pieces of information that appear alternately in a window on a dial, such as an ON / OFF or AM / PM display. Such a mechanism can also be used to control, as the clockwork movement passes over it, the display of two different aspects of a dial.

[0004] To impart a reciprocating motion to a timepiece between two stable positions, various reciprocating mechanisms have been developed. These mechanisms transform the continuous rotary motion of a component into a reciprocating movement of the timepiece between its two stable positions. These reciprocating mechanisms typically comprise numerous components and are difficult to manufacture. Furthermore, they generally either do not allow for a clean, instantaneous transition from one stable position to the other, meaning the timepiece may end up in undesired intermediate, more or less stable positions, or they are not reversible, preventing a reciprocating motion regardless of the direction of rotation of the timepiece component.

[0005] The present invention aims to remedy these drawbacks by proposing a clockwork mechanism which makes it possible to transform in a simple way a rotary motion, regardless of its direction of rotation, into an alternating and instantaneous displacement between two stable positions. Disclosure of the invention

[0006] To this end, the invention relates to a clockwork mechanism comprising at least one clockwork element arranged to be mobile alternately between two stable positions and a drive device for said clockwork element comprising a drive element rotating in at least one direction and arranged to be able to drive said clockwork element alternately from one to the other of its two stable positions.

[0007] According to the invention, said drive device comprises at least one blade integral with said at least one clockwork element, said at least one blade comprising at least one flexible portion and being mounted to slide along its longitudinal axis in a housing of a clockwork mechanism frame between a first and a second position corresponding respectively to one of the two stable positions of the clockwork element, and the rotary drive element comprises a cam whose outer profile includes at least one protrusion arranged to be in contact with the flexible portion of the blade, said outer profile of the cam and the blade being arranged to cooperate together so that a rotation of the rotary drive element in the same at least one direction successively causes a compression of the flexible portion of the blade by the cam, an instantaneous displacement of the blade in one direction from one of its first and second positions to the other,compression of the flexible portion of the blade by the cam, followed by an instantaneous displacement of the blade in the opposite direction from one to the other of its first and second positions, so as to move the clockwork mechanism alternately from one to the other of its two stable positions in an instantaneous back-and-forth motion.

[0008] In a preferred embodiment, the drive member is bidirectional, and the external profile of the cam and the blade are arranged to cooperate together so that a rotation of the rotary drive member in one direction or the other causes successively a compression of the flexible portion of the blade by the cam, an instantaneous displacement of the blade in one direction from one of its first and second positions to the other, a compression of the flexible portion of the blade by the cam, and then an instantaneous displacement of the blade in the other direction from one of its first and second positions to the other, so as to move the watchmaking member alternately from one of its two stable positions to the other in a back-and-forth motion regardless of the same direction of rotation of the rotary drive member.

[0009] Such successive compressions of the flexible portion of the blade by the external profile of the cam during the rotation of the drive member advantageously allow the blade to store elastic energy during a compression, this elastic energy then being restored to allow the blade to move instantaneously alternately from one to the other of its first and second positions.

[0010] The drive mechanism for the timekeeping component used in the present invention is simple to manufacture and implement. It allows a rotary movement of the drive mechanism, regardless of its direction of rotation, to be transformed into an alternating and instantaneous displacement of the blade, and therefore of the timekeeping component, between two stable positions.

[0011] The present invention also relates to a watch movement comprising a watch mechanism as defined above.

[0012] The present invention also relates to a timepiece comprising a clockwork mechanism or movement as defined above. Brief description of the drawings

[0013] Other features and advantages of the present invention will become apparent from the following detailed description of embodiments of the invention, given by way of non-limiting examples, and made with reference to the accompanying drawings in which: there figure 1 is an exploded schematic view of a clockwork mechanism according to the invention; the figure 2 is a top view of the clockwork mechanism of the figure 1 ; THE figures 3 to 7 are views of the clockwork mechanism of the figure 1 in different positions, from the blade in its first position to the blade in its second position before returning to its first position; and the figures 8 to 12are views of a clockwork mechanism according to the invention in which the clockwork organ is an AM / PM display in different positions from the blade in one of its positions to the blade in another of its positions, before returning to one of its positions. Embodiments of the invention

[0014] With reference to the figure 1 , and also in particular to figures 2 And 8 The present invention relates to a clockwork mechanism of a clock movement comprising at least one clockwork organ 1 arranged to be mobile alternately between two stable positions.

[0015] Such a horological element 1 can be, for example, a display element showing two pieces of information that appear alternately in a window 2 of a dial, either on the fly or on demand, such as an AM / PM display as shown here, or an ON / OFF display linked to a function of the horological mechanism. The display element can also be a dial or a movable cover, operated on the fly or on demand to be moved alternately between two fixed positions. The movable dial is, for example, a dial displaying the hours 1-12 or 12-24, controlled by the movement and capable of being corrected in both directions. The cover can be used to alternately hide or reveal information.

[0016] Such a clockwork mechanism can also be a component of an animation, such as an automaton, the said component being able to be mobile alternately between two stable positions.

[0017] The said clockwork organ can also be a reciprocating element of a constant force device arranged to cooperate with a toothed wheel linked to a power source to alternately lock or release it.

[0018] The watch mechanism also includes a drive device 4 for said watch component 1, comprising a drive member 6 rotatably mounted at O ​​in at least one direction and arranged to drive said watch component 1 alternately from one to the other of its two stable positions. The rotating drive member 6 includes a cam 8, described in detail below, and a drive wheel 10 integral with the cam 8 and intended to be driven in rotation by the watch movement. The rotation of the drive wheel 10 may be continuous, intermittent, on-demand, or passing. For example, the drive wheel 10 may be kinematically linked to a wheel of the watch movement, such as the hour wheel, to a crown, a bezel, or a lock.

[0019] According to the invention, said drive device 4 comprises at least one blade 12 integral with said at least one clockwork element 1. For example, in the example shown in the figure 8 The clockwork organ 1 may be a plate bearing the information to be displayed alternately and fixed securely to the blade 12. Preferably, the general shape of the plate is similar to the general shape of the blade 12.

[0020] Said at least one blade 12 is mounted sliding along its longitudinal axis in a housing 14 of a frame 16 of the clock mechanism between a first and a second position corresponding respectively to one of the two stable positions of the clockwork organ 1.

[0021] Said at least one blade 12 comprises at least one flexible portion 12a, that is to say capable of storing elastic energy when compressed.

[0022] The flexible portion 12a comprises a central projection 12b directed towards the rotating drive member 6 and arranged to follow the external profile of the cam 8. Said central projection 12b comprises a tip 13a and first and second flanks 13b, 13c extending on either side of the tip 13a. The blade 12 also comprises two blade portions 12c, 12d extending, substantially along its longitudinal axis of the blade 12, on either side of the central projection 12b. The respective free ends 12e, 12f of the blade portions 12c, 12d are configured to be mounted to slide freely against a wall of the housing 14. As described below, said free ends 12e, 12f of the blade portions 12c, 12d are capable of exerting, at the points of contact with the wall of the housing 14, a friction force FfL of the blade 12 on the frame 16. Said housing 14 includes two stops 18a, 18b defining the first and second positions of the blade 12.

[0023] More particularly, the housing 14 can advantageously be formed of two housings 14a, 14b facing each other by means of two ears 20a, 20b substantially in the shape of C and fixed securely to the frame 16 symmetrically with respect to an axis passing through O and perpendicular to the axis of rotation of the drive member 6. Each ear 20a, 20b comprises one of said housings 14a, 14b whose wall 14c, 14d respectively, parallel to the longitudinal axis of the blade 12, forms a slide for the associated free end 12e, 12f of the blade 12, said wall 14c, 14d being configured to allow the blade 12 to move in either of its first and second positions. The bottom of each housing 14a, 14b constitutes one of the stops 18a, 18b, the distance between the two stops 18a, 18b being greater than the length of the blade 12.Advantageously, the ends 12e, 12f of the blade 12 may have a greater thickness than the rest of the blade 12 to form contact tabs with the walls of the housings 14a, 14b and be rounded so that each can fit into the associated rounded bottom 14a, 14b of the blade 12 when said blade 12 is in one of its first and second positions. By convention, for the remainder of the description, the blade 12 occupies its first position when its first end 12e is abutted in the first housing 14a against the first stop 18a, as shown in the figures. figures 2 , 3, 4 and 7 and the blade 12 occupies its second position when its second end 12f is abutted in the second housing 14b against the second stop 18b, as shown in the figures 5 and 6 .

[0024] According to the invention, the cam 8 of the rotating drive member 6 has an external profile which is arranged to be in permanent contact at least at one point with the flexible portion 12a of the blade 12.For this purpose, said external profile of the cam 8 includes at least one protrusion 21, said at least one protrusion 21 and the blade being configured to cooperate together so that a rotation of the rotating drive member 6, continuous or timed, but in the same at least one direction, successively causes a compression of the flexible portion 12a of the blade 12 by the cam 8, said blade 12 storing elastic energy, then an instantaneous displacement of the blade 12, thanks to the restitution of the stored elastic energy, in one direction from one of its first and second positions to the other, then a new compression of the flexible portion 12a of the blade 12 by the cam 8, said blade 12 again storing elastic energy, then an instantaneous displacement of the blade 12, thanks to the restitution of the stored elastic energy, in the other direction from one of its first and second positions to the other.These four times are repeated due to the rotation of the rotating drive organ 6 in the same at least one direction so as to move the clockwork organ 1 alternately from one to the other of its two stable positions in an instantaneous back-and-forth movement.

[0025] In a preferred embodiment, the drive member 6 is bidirectional, and the external profile of the cam 8 and the blade 12 are configured to cooperate so that a continuous or timed, reversible rotation of the drive member 6, i.e., in one direction or the opposite direction, successively causes a compression of the flexible portion 12a of the blade 12 by the cam 8, said blade 12 storing elastic energy, then an instantaneous displacement of the blade 12, thanks to the release of the stored elastic energy, in one direction from one of its first and second positions to the other, then a further compression of the flexible portion 12a of the blade 12 by the cam 8, said blade 12 again storing elastic energy, then an instantaneous displacement of the blade 12, thanks to the release of the stored elastic energy, in the other direction from one to the other of its first and second positions.These four times are repeated due to the rotation of the rotating drive member 6, so as to move the clockwork member 1 alternately from one to the other of its two stable positions in a back-and-forth movement, regardless of the direction of rotation of the rotating drive member 6.

[0026] More specifically, and with reference to the figure 2 The outer profile of the cam 8 comprises at least one protrusion 21 having a vertex 22. Said at least one protrusion 21 and the blade 12 are configured to cooperate together during the rotation of the drive member 6, such that, during the rotation of the cam 8 in the same direction, successively: The rotating cam 8 cooperates with the flexible portion 12a of the blade 12, more particularly with its projection 12b, to exert a compressive force component Fc on said flexible portion 12a, while maintaining said blade 12 in its first position, immobilized on the frame 16. Thus, the blade 12 is compressed, storing elastic energy, until the apex 22 of the protuberance 21 of the rotating cam 8 arrives at the tip 13a of the blade 12; then, the apex 22 of the protuberance 21 of the rotating cam 8 having passed the tip 13a of the blade 12, the blade 12, freed, can move into its second position, and this instantaneously thanks to the restitution of said stored elastic energy, its free ends 12e, 12f sliding in support on a wall of the housing 14;then, the rotating cam 8 cooperates with the flexible portion 12a of the blade 12, more particularly its salient 12b, to exert a compressive force component Fc' on said flexible portion 12a, while maintaining the blade 12 in the second position, immobilized on the frame, so that said blade 12 is compressed by storing elastic energy, then to also exert a tangential force component FT on the flexible portion 12a of the blade 12, and more particularly on its salient 12b, the blade 12 exerting a friction force component FfL on the frame 16 greater than the tangential force component FT, until said tangential force component FT is greater than said friction force component FfL of the blade 12 on the frame 16;then, the said tangential force component FT having become greater than the friction force component FfL of the blade 12 on the frame 16, the said blade 12 can move again, pushed into its first position, and this instantaneously thanks to the restitution of the said stored elastic energy, its free ends 12e, 12f sliding in support on a wall of the housing 14. ;

[0027] Advantageously, the blade 12, and in particular its flexible portion 12a, is made of any material suitable for use as a spring, such as steel, nickel, nickel silver, silicon, or any other suitable material.

[0028] The materials of the cam 8, the blade 12, and the housing 14 are chosen so that their respective coefficients of friction between the cam 8 and the blade 12, and between the blade 12 and the housing 14, are compatible to allow the cam 8 to exert the compressive force component Fc or Fc' and the tangential force component FT on the blade 12, and to allow the blade 12 to exert the frictional force component FfL on the frame 16, as described above. For example, the cam 8 could be made of brass, and the housing 14 of brass, CuBe, nickel silver, and the blade 12 of steel. The cam 8, the housing 14, and the blade 12 could all be made of silicon.

[0029] In a preferred embodiment, the outer profile of the cam 8 of the rotating drive member 6 comprises n successive protrusions 21, each protrusion comprising a vertex 22 and two ramps 24a, 24b, where for each vertex 22, there is a front ramp 24a and a rear ramp 24b, in the direction of rotation of the drive member 6, here the counterclockwise direction shown on the figures 3 to 7 , extend on either side of the common vertex 22, to form a protuberance 21, with n an integer greater than or equal to 1, preferably n an integer greater than or equal to 5, and more preferably n between 5 and 8, inclusive.

[0030] For each vertex 22, and with reference to the figure 3, the front ramp 24a of a protuberance 21 of the external profile of the cam 8 includes a first compression portion 26 extending to the common apex 22 of the protuberance 21 of the external profile of the cam 8 and arranged to compress the salient 12b of the blade 12, by exerting a compression force Fc more particularly on its first flank 13b.

[0031] For each vertex 22, the rear ramp 24b of the protuberance 21 of the external profile of the cam 8 comprises, in the direction of rotation of the drive member 6, a second compression portion 28 and then a thrust portion 30 arranged to cooperate with the salient 12b of the blade 12. The rear ramp 24b also comprises, in the direction of rotation of the drive member 6, i.e. here always the counterclockwise direction, a guide portion 32 arranged to guide the salient 12b, and more particularly its second flank 13c, after the passage of the common vertex 22 of said protuberance 21.

[0032] The said front ramps 24a and rear ramps 24b are arranged to position themselves relative to the first and second flanks 13b, 13c of the projection 12b of the blade 12 during the rotation of the drive member 6 so that, during the rotation of the cam 8 in the same direction, successively: The first compression portion 26 of the front ramp 24a of the rotating cam 8 cooperates with the first flank 13b of the salient 12b, oriented in the same direction as said first compression portion 26, to exert a compressive force component Fc on said first flank 13b, while keeping the blade 12 immobilized in its first position, its first end 12e being abutted, in the first housing 14a, against the first stop 18a, as shown in the figure 3The clockwork mechanism 1 is then in its first stable position. Thus, the compressed blade 12 stores elastic energy until the apex 22 of the protrusion 21 of the rotating cam 8 reaches the tip 13a of the blade 12, as shown in the figure 4 ; then, the apex 22 of the protuberance 21 of the rotating cam 8 having passed the tip 13a of the salient 12b of the blade 12, said blade 12 moves instantaneously towards its second stop 18b in its second position thanks to the restitution of the elastic energy stored by said blade 12 during the first compression, and the salient 12b, and more particularly its second flank 13c, passes over the rear ramp 24b of the protuberance 21, guided by the guide portion 32, the free ends 12e, 12f of the blade 12 sliding in support against the walls of the housings 14a, 14b, as shown in the figure 5; then the second compression portion 28 of the rear ramp 24b of the rotating cam 8 cooperates with the second flank 13c of the salient 12b, oriented in the same direction as said second compression portion 28, to exert a compression force component Fc' on said second flank 13c while keeping said blade 12 immobilized in its second position, its second end 12f being abutted in the second housing 14b, against the second stop 18b, as shown in the figure 5 The clockwork mechanism 1 is then in its second stable position. Thus, the compressed blade 12 stores elastic energy; Then, as the drive element 6 continues its rotation, the rear ramp 24b of the rotating cam 8 passes the tip 13a of the salient 12b of the flexible portion 12a of the blade 12 and pivots onto the first flank 13b of said salient 12b. Following this pivoting effect, the thrust portion 30 of the rear ramp 24b cooperates with said first flank 13b to also exert a tangential force component FT on said first flank 13b, the blade 12 exerting a frictional force component FfL on the frame 16 greater than the tangential force component FT, as shown in the diagram. figure 6As it continues to rotate, the cam 8 continues to compress the projection 12b of the blade 8, but the tangential force component FT of the cam 8 on the projection 12b, and more particularly on its first flank 13b, increases. When this tangential force component FT of the cam 8 on the projection 12b becomes greater than the friction force FfL of the ends 12e, 12f of the blade 12 on the frame 16, the projection 12b, and therefore the blade 12, are displaced instantaneously, pushed towards the first stop 18a, into its first position thanks to the release of the elastic energy stored by the blade 12 during the second compression, the free ends 12e, 12f of the blade 12 sliding in contact with the walls of the housings 14a, 14b, as shown in the diagram. figure 7 The clockwork mechanism 1 then returned to its first stable position, in an instantaneous back-and-forth movement.

[0033] Then a similar sequence begins again, the rear ramp 24b becoming the new front ramp 24a, relative to the next summit, its first compression portion 26 beginning to compress the salient 12b of the blade 12.

[0034] Therefore, each ramp 24a, 24b of one of the protuberances 21 of the external profile of the cam 8 comprises, in the direction of rotation of the drive member 6, the guide portion 32, the second compression portion 28, the thrust portion 30 and then the first compression portion 26.

[0035] If the drive element 6 changes direction of rotation, the front and rear ramps 24a, 24b of the common vertex 22 are reversed, the sequence restarting in the opposite direction.

[0036] Thus, the clockwork mechanism of the invention comprises few parts and makes it possible to transform a rotary movement of the drive member 6, regardless of its direction of rotation, into an alternating and instantaneous displacement between two stable positions of the blade 12, and therefore of the clockwork member 1.

[0037] In a particularly advantageous manner, the n successive protrusions 21 can have a more or less rounded or pointed apex 22. In the example shown, the compression force component Fc during the first compression of the flexible portion 12a of the blade by the cam 8 is greater than the compression component Fc' during the second compression. The geometry of the protrusions 21 of the cam 8 and the salient 12b of the blade 12 can be adapted to equalize the compression forces Fc and Fc' of the cam 8 on the flexible portion 12a of the blade 12, and more particularly on its salient 12b, during a sequence or, conversely, to utilize this difference in compression force.

[0038] Preferably, the cam 8 of the drive member 6 has an n-sided polygonal outer profile, for example hexagonal with n=6, each side of the polygon forming a ramp 24a, 24b as described above and each vertex of the polygon forming a vertex 22 as described above. Thus, one rotation of the drive member 6 represents n x 2 alternations of the reciprocating motion.

[0039] Preferably, the angle of the apex 22 of a protuberance 21 of the external profile of the cam 8 is substantially equal to the angle of the tip 13a of the salient 12b.

[0040] In an embodiment not shown, several blades 12 can be provided around the rotating drive member 6, and arranged so that the cam 8 can cooperate with several blades 12 at the same time. This allows several clockwork elements to be driven in a reciprocating motion.

[0041] With reference to Figures 8 and 12The various phases of the back-and-forth movement obtained with the clockwork mechanism according to the invention are shown for a clockwork element 1 intended for displaying the AM / PM information alternately according to the time. The drive wheel 10 of the rotating drive element 6 is kinematically linked to an hour wheel.

[0042] On the figure 8 The display element 1 displays the AM information in the window 2. The display element 1 is in its first stable position, the blade 12 being in its first position, abutted against its first stop 18a in the first housing 14a. This position corresponds to the situation of the figure 3 described above.

[0043] A rotation of the rotary drive element 6, and therefore of the cam 8, in the same counterclockwise direction successively drives: Between 0 and 12 o'clock, a compression of the flexible portion 12a of the blade 12 by the cam 8, its first compression portion 26 acting on the flank 13b of the salient 12b of the blade 12, said blade 12, still in its first position, storing elastic energy, until the tip 13a of the salient 12b reaches 12 o'clock on the apex 22 of the cam 8, as shown in the figure 9 which corresponds to the situation of the figure 4 described above; at 12 o'clock, an instantaneous displacement of the blade 12 occurs, thanks to the release of previously stored elastic energy, during which the flank 13c of the blade's salient 12b is guided by the guide portion 32 of the cam 8. The blade 12 is moved into its second position, abutting its second stop 18b in the second housing 14b. The display element 1 is in its second stable position and displays the PM information in the window 2 as shown in the Figure 10 which corresponds to the situation of the figure 5 described above; from 12 o'clock to 24 o'clock, a new compression of the flexible portion 12a of the blade 12 by the second compression portion 28 of the cam 8, acting on the salient 12b of the blade 12, said blade 12, still in its second position, again storing elastic energy, as shown on the figure 11 which corresponds to the situation of the figure 6 described above; at 0h, an instantaneous displacement of the blade 12, pushed by the thrust portion 30 of the cam 8 acting on the flank 13b of the salient 12b of the blade 12, occurs thanks to the release of stored elastic energy. Said blade 12 is returned to its first position against its first stop 18a in the first housing 14a. The display element 1 has returned to its first stable position and again displays the information AM in the window 2, as shown in the figure 12 which corresponds to the situation of the figure 7 described above.

[0044] These four times are repeated due to the rotation of the drive member 6, always in the same direction, so as to move the clock member 1 alternately from one to the other of its two stable positions in a back-and-forth movement, regardless of the direction of rotation of the rotating drive member 6.

Claims

1. A clockwork mechanism comprising at least one clockwork element (1) arranged to be movable alternately between two stable positions and a drive device (4) for said clockwork element (1) comprising a drive element (6) rotatable in at least one direction and arranged to be able to drive said clockwork element (1) alternately from one to the other of its two stable positions, characterized in that said drive device (4) comprises at least one blade (12) integral with said at least one clockwork element (1), said at least one blade (12) comprising at least one flexible portion (12a) and being mounted to slide along its longitudinal axis in a housing (14) of a frame (16) of the clockwork mechanism between a first and a second position corresponding respectively to one of the two stable positions of the clockwork element (1), and in thatThe rotating drive member (6) comprises a cam (8) whose outer profile includes at least one protrusion (21) arranged to be in contact with the flexible portion (12a) of the blade (12), said outer profile of the cam (8) and the blade (12) being arranged to cooperate together such that a rotation of the rotating drive member (6) in the same at least one direction successively causes a compression of the flexible portion (12a) of the blade (12) by the cam (8), an instantaneous displacement of the blade (12) in one direction from one of its first and second positions to the other, a compression of the flexible portion (12a) of the blade (12) by the cam (8), and then an instantaneous displacement of the blade (12) in the other direction from one of its first and second positions to the other, so as to move the clockwork element (1) alternately from one of its two stable positions to the other. an instant back-and-forth movement.

2. Clockwork mechanism according to claim 1, characterized in that the drive element (6) is rotatable in both directions, and in that The external profile of the cam (8) and the blade (12) are arranged to cooperate together so that a rotation of the rotating drive member (6) in one direction or the other direction successively causes a compression of the flexible portion (12a) of the blade (12) by the cam (8), an instantaneous displacement of the blade (12) in one direction from one of its first and second positions to the other, a compression of the flexible portion (12a) of the blade (12) by the cam (8), then an instantaneous displacement of the blade (12) in the other direction from one of its first and second positions to the other, so as to move the clockwork member (1) alternately from one of its two stable positions to the other in a back-and-forth motion regardless of the same direction of rotation of the rotating drive member (6).

3. Clockwork mechanism according to any one of the preceding claims, characterized in that the external profile of the cam (8) includes at least one protrusion (21) having a summit (22), and in thatThe flexible portion (12a) of the blade (12) includes a tip (13a), said protuberance (21) being arranged to cooperate with the blade (12) during the rotation of the drive member (6) such that, during the rotation of the cam (8) in the same direction, successively, the rotating cam (8) cooperates with the flexible portion (12a) of the blade (12) to exert a compressive force component (Fc) on said flexible portion (12a) while maintaining said blade (12) in its first position, said compressed blade (12) storing elastic energy, until the apex (22) of the protuberance (21) of the rotating cam (8) passes the tip (13a) of the blade (12) allowing said blade (12) to move into its second position instantaneously thanks to the restitution of said elastic energy,Then the rotating cam (8) cooperates with the flexible portion (12a) of the blade (12) to exert a compressive force component (Fc') on said flexible portion (12a) while maintaining said blade (12) in a second position, said compressed blade (12) storing elastic energy, until the rotating cam (8) cooperates with the flexible portion (12a) of the blade (12) to exert on said flexible portion (12a) a tangential force component (FT) greater than a frictional force component (FfL) of the blade (12) on the frame (16), allowing the blade (12) to move into its first position instantaneously thanks to the restitution of said elastic energy.

4. Clockwork mechanism according to claim 3, characterized in thatthe flexible portion (12a) of the blade (12) includes a central projection (12b) directed towards the rotating drive member (6) and arranged to follow the external profile of the cam (8), said projection (12b) comprising said tip (13a) and first and second flanks (13b, 13c) extending on either side of the tip (13a), and in thatsaid at least one protrusion (21) of the outer profile of the cam (8) of the rotating drive member (6) comprises said apex (22) and two ramps (24a, 24b), a front ramp (24a) and a rear ramp (24b) in the direction of rotation of the drive member (6), extending on either side of the common apex (22), said front ramp (24a) comprising a first compression portion (26) extending to the common apex (22) and the rear ramp (24b) comprising, in the direction of rotation of the drive member (6), a second compression portion (28) and then a thrust portion (30), said front ramps (24a) and rear ramps (24b) being arranged to be positioned relative to the first and second flanks (13b, 13c) of the projection (12b) of the blade (12) when of the rotation of the drive member (6) so that, during the rotation of the cam (8) in the same direction, successively,The first compression portion (26) of the front ramp (24a) of the rotating cam (8) cooperates with the first flank (13b) of the projection (12b) of the flexible portion (12a) of the blade (12) to exert a compression force component (Fc) on said first flank (13b) while maintaining said blade (12) in its first position, said compressed blade (12) storing elastic energy, until the apex (22) of the protrusion (21) of the rotating cam (8) passes the tip (13a) of the blade (12), allowing said blade (12) to move into its second position instantaneously through the release of said elastic energy, then the second compression portion (28) of the rear ramp (24b) of the rotating cam (8) cooperates with the second flank (13c) of the flexible portion (12a) of the blade (12) to exert a force component of compression (Fc') on said second flank (13c) while maintaining said blade (12) in its second position,said compressed blade (12) storing elastic energy, then the rear ramp (24b) of the rotating cam (8) having tilted onto the first flank (13b) of the salient (12b) of the flexible portion (12a) of the blade (12), the thrust portion (30) of said rear ramp (24b) of the rotating cam (8) cooperates with said first flank (13b) to exert on said first flank (13b) a tangential force component (FT), the blade (12) exerting a frictional force component (FfL) on the frame (16), until said tangential force component (FT) is greater than said frictional force component (FfL) of the blade (12) on the frame (16), allowing the blade (12) to move into its first position instantaneously thanks to the restitution of said elastic energy.

5. Clockwork mechanism according to claim 4, characterized in thateach ramp (24a, 24b) of said at least one protrusion (21) of the outer profile of the cam (8) comprises, in the direction of rotation of the drive member (6), a guide portion (32) arranged to guide the salient (12b) after the passage of the apex (22) of said at least one protrusion (21) of the outer profile of the cam (8), the second compression portion (28), the thrust portion (30) and then the first compression portion (26).

6. Clockwork mechanism according to one of claims 4 and 5, characterized in that the blade (12) comprises two blade portions (12c; 12d) extending on either side of the projection (12b) and whose free ends (12e, 12f) are mounted to slide freely against a wall of the housing (14) and are capable of exerting the friction force component (FfL) of the blade (12) on the frame (16), and in thatsaid housing (14) includes two stops (18a, 18b) defining the first and second positions of the blade (12).

7. Clockwork mechanism according to one of the preceding claims, characterized in that the cam (8) of the drive member (6) has an external profile comprising n protrusions (21), n ​​an integer greater than or equal to 1, preferably n an integer greater than or equal to 5.

8. Clockwork mechanism according to claim 7, characterized in that the cam (8) of the drive member (6) has an external polygonal profile with n sides, preferably n is equal to 6.

9. Clockwork mechanism according to claim 8, characterized in that the angle of the apex of said at least one protrusion (21) of the external profile of the cam (8) is substantially equal to the angle of the tip (13a) of the salient (12b).

10. Clockwork mechanism according to any one of the preceding claims, characterized in thatthe rotating drive element (6) includes a drive wheel (10) attached to the cam (8) and intended to be driven in rotation by a clockwork movement.

11. Clockwork mechanism according to any one of the preceding claims, characterized in that the clockwork organ (1) is a display organ of two pieces of information, a dial movable between two positions, a component of an animation, an element of a constant force device linked to a source of energy.

12. Clock movement comprising a clockwork mechanism according to any one of claims 1 to 11.

13. Timepiece comprising a clockwork mechanism according to any one of claims 1 to 11 or a clockwork movement according to claim 12.

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