Drive device for a clockwork mechanism
Patent Information
- Application Number
- EP2023752058
- Authority / Receiving Office
- EP · EP
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2022-11-04
- Filing Date
- 2023-07-28
- Publication Date
- 2025-09-10
AI Technical Summary
Existing watch mechanism drive devices require complex mechanisms with multiple moving parts to activate complications like animations and sound emissions on demand, making them bulky and difficult to integrate into compact timepieces.
A drive device with a single movable drive member and two transmission members, each performing a winding and return movement to drive the mechanism in a cyclical manner, allowing activation by either member without blocking rotation, and featuring a deactivation mechanism for safe operation.
Enables the activation of watch mechanisms in a simple, compact, and efficient manner with a minimal number of moving parts, allowing for seamless integration into timepieces while preventing damage during time-setting operations.
Smart Images
Figure 1.1
Abstract
Description
[0001] Drive device for clockwork mechanism
[0002] The present invention relates to a drive device for a watch mechanism. The present invention relates in particular to a drive device allowing the activation on passage or on demand of a watch mechanism, for example an animation, display and / or striking mechanism.
[0003] Some timepieces include one or more complications for displaying additional information in addition to the time, for example other time information, and / or for creating a decorative and entertaining animation, and / or for emitting a sound, for example to indicate the time or for an alarm. These complications include watch mechanisms which, when integrated into a timepiece, are arranged to be activated on passage, that is to say at determined moments such as for example when the hour passes, or on demand via a control member actuable by the user. Typically, the movement of the animation or display is cyclical: starting from an initial position, the animation or display member(s) move through a determined sequence of positions before returning to their initial position.Similarly, bells generally emit a predetermined ringing cycle each time they are activated, corresponding for example to a time information.
[0004] The watch mechanism of such a complication is generally associated with a transmission member which transmits to the watch mechanism the energy necessary to set in motion the animation, display and / or striking member(s). In the case where the watch mechanism is associated with a watch movement of a timepiece, the transmission member may for example be supplied with energy by the driving member of the watch movement or may be independent of the watch movement. The possibility of activating a complication on the fly and on demand generally requires a relatively complex watch mechanism drive device, sometimes requiring two separate drive members. The volume and complexity of such devices can make their integration into a timepiece, particularly in a wristwatch, complicated.
[0005] An object of the present invention is to provide a drive device for a watch mechanism which allows the activation of a watch mechanism on passage and on demand with a single drive member.
[0006] Another object of the present invention is to provide a drive device for a watch mechanism which allows the activation of a watch mechanism on passage and on demand in a simple, compact manner and with a minimal number of moving parts.
[0007] These aims and other advantages are achieved by a drive device for a watch mechanism, comprising a drive member mounted to rotate about an axis of rotation and configured to drive a watch mechanism, the drive member comprising a plurality of bearing surfaces; a first transmission member movable in a winding movement from a first position of the first transmission member to a second position of the first transmission member and in a return movement from its second position to its first position; a second transmission member movable in a winding movement from a first position of the second transmission member to a second position of the second transmission member and in a return movement from its second position to its first position;each transmission member being configured to, during its return movement from its second position to its first position, drive the drive member in rotation by cooperation with a bearing surface of the plurality of bearing surfaces; the second transmission member being configured not to block the rotation of the drive device when the first transmission member drives the drive member and the first transmission member being configured not to block the rotation of the drive member when the second transmission member drives the drive member.;
[0008] A clockwork mechanism can thus be driven by a single drive member which can be set in motion either by a first transmission member or by a second transmission member, without the movement of the drive member being prevented by the inactive transmission member.
[0009] The first transmission member and the second transmission member are preferably mounted to be rotatable about the axis of rotation and rotate in one direction of rotation during the winding movement and in the opposite direction of rotation during the return movement.
[0010] According to a preferred form, the first transmission member and the second transmission member each comprise a thrust member for cooperating with the bearing surfaces to push the drive member into rotation, each thrust member being located at the distal end of a flexible arm, the proximal end of each of said flexible arms being mounted to rotate around the axis of rotation.
[0011] The first and second transmission members can thus each push the drive member in rotation by pressing their thrust member against a bearing surface of the drive member, the inactive transmission member allowing the rotation of the drive member like a ratchet.
[0012] According to some embodiments, the drive device further comprises a first spring for moving the first transmission member in its winding movement from its second position to its first position and a second spring for moving the second transmission member in its winding movement from its second position to its first position. The first and second springs are preferably configured to be wound during the winding movement of the respective transmission member from its first position to its second position, which winding movement is performed against the restoring force of the spring.
[0013] The drive member comprises, for example, a toothing.
[0014] The bearing surfaces are preferably regularly distributed around the axis of rotation over a diameter of the drive member. This allows a step-by-step advance of the drive member with each activation by a transmission member, the angular pitch of the drive member corresponding, for example, to the angle between two adjacent bearing surfaces or to a multiple thereof.
[0015] The bearing surfaces are preferably formed on an inner periphery of a ring of the drive member, the ring preferably being located projecting from the board of the drive member. This represents the advantage that the transmission members can be at least partially arranged inside this ring, thus allowing a compact construction of the drive device of the invention.
[0016] Optionally, the drive device comprises a deactivation mechanism for decoupling, for example, the first transmission member from the drive member. This makes it possible, in particular when the first transmission member is controlled in passing by a watch movement, to deactivate the first transmission member when setting the time of the watch movement in order to avoid damaging the drive device. This also makes it possible, alternatively or additionally, and with appropriate control, to temporarily deactivate the watch mechanism driven by the drive device.
[0017] The above-mentioned aims and other advantages are also achieved by a timepiece comprising a watch movement and such a drive device, in which the first transmission member is moved in its winding movement from its first position to its second position by the watch movement and the second transmission member is configured to be moved in its winding movement from its first position to its second position by a manual control mechanism.
[0018] In such a timepiece, the deactivation mechanism is preferably actuated automatically when the watch movement is capable of receiving a time-setting operation, for example when the winding stem is pulled out.
[0019] Alternatively or additionally, the deactivation mechanism can be activated on demand by a user, for example using an “on / off” button accessible by a user of the timepiece.
[0020] The timepiece is, for example, a wristwatch.
[0021] The present invention will be better understood with the aid of the description below illustrated by the figures, where:
[0022] Figure 1 partially illustrates a drive device according to one embodiment of the invention;
[0023] Figure 2 is a perspective view of the drive device partially illustrated in Figure 1;
[0024] Figures 3 to 7 illustrate the activation of the drive device of Figure 1 by a first transmission member;
[0025] Figures 8 to 11 illustrate the activation of the drive device of Figure 1 by a second transmission member;
[0026] Figure 12 shows in detail a deactivation mechanism for the drive device of Figure 1.
[0027] The drive device 1 of the invention is a device allowing the activation, for example on passage or on demand, of a watch mechanism not shown, for example an animation, display and / or striking mechanism. Preferably, the drive device 1 is intended to drive a watch mechanism operating in cycles, for example by animation, display or striking cycles, and the drive device 1 is configured to advance step by step, each step preferably corresponding to a cycle of the driven watch mechanism.
[0028] With reference to the figures, the drive device 1 of the invention comprises a drive member 2 mounted to rotate about an axis of rotation 10. The drive member 2 is configured to drive the timepiece mechanism driven by the drive device 1. According to the illustrated embodiment, the drive member 2 is for example a toothed wheel whose teeth 29 are intended to mesh with a mating mobile not shown, for example a toothed wheel, of the timepiece mechanism. Other configurations of the drive member are however possible within the scope of the invention. According to certain embodiments, the drive member is for example a cam or teeth actuating hammer lifts for a striking mechanism.
[0029] According to the invention, the drive device 1 comprises two transmission members 3, 4 for setting the drive member 2 in motion around the axis of rotation 10 in order to actuate the clockwork mechanism driven by the drive device 1. According to the invention, each transmission member 3, 4 is configured to set the drive member 2 in motion alone. Each transmission member 3, 4 is further configured to authorize the movement of the drive member 2 when the latter is set in motion by the other transmission member 4, 3. Each time a transmission member 3, 4 sets the drive member 2 in motion, the drive member 2 is preferably advanced by a predetermined step in a direction of rotation, for example in the clockwise direction. The step is preferably determined to correspond to the driving of the clockwork mechanism over a complete cycle.
[0030] As explained in more detail below, each transmission member 3, 4 is configured to perform a back-and-forth movement between a first position, for example a rest position, and a second position, for example a winding position. During the movement of the transmission member 3, 4 from its rest position to its winding position, the drive member 2 is not set in motion by the transmission member 3, 4. During the return in the opposite direction of the transmission member 3, 4 from its winding position to its rest position, the drive member is set in motion and rotated by one step around the rotation axis 10 in a determined direction, for example clockwise.
[0031] According to the illustrated embodiment, each transmission member 3, 4 comprises a thrust member 30, 40 configured to come into contact with a bearing surface 21 of the drive member 2 in order to push the drive member 2 in rotation over at least a fraction of a turn, corresponding for example to a complete cycle of the clockwork mechanism driven by the drive device 1. Each thrust member 30, 40 is for example located at the distal end of a flexible arm 31, 41 whose proximal end is mounted in rotation, for example around the axis of rotation 10 around which the drive member 2 is also mounted in rotation.Each flexible arm 31, 41 is preferably configured so as to be flexible in a radial direction relative to the axis of rotation 10 in order to be able to slide on a surface of the drive member 2 when the latter is set in motion by the other flexible arm 41, 31, and rigid in a tangential direction relative to the axis of rotation 10 in order to be able to push the drive member 2 in rotation by cooperation of the corresponding pushing member 30, 40 and a bearing surface 21. Each transmission member 3, 4 thus acts as a ratchet, allowing the rotation of the drive member 2 relative to the transmission member 3, 4 in a first direction of rotation and blocking the rotation of the drive member 2 relative to the transmission member 3, 4 in a second direction of rotation opposite to the first as soon as the corresponding pushing member 30, 40 comes into contact with a bearing surface. 21 of the drive member 2.Each flexible arm 31, 41 comprises for example a rigid base mounted in rotation on the axis of rotation 10 and extending essentially radially from the axis of rotation 10, and an elongated part extending from the end of the rigid base essentially in an arc of a circle relative to the axis of rotation 10 and flexible in a radial direction relative to the axis of rotation 10.
[0032] According to this embodiment, the drive member 2 preferably comprises a plurality of bearing surfaces 21 intended to cooperate with the thrust members 30, 40 for rotating the drive member 2. The bearing surfaces 21 are for example formed by internal notches made on a ring 20 of the drive member 2. The ring 20 is for example located projecting from the plate of the toothed wheel 2. The ring 20 is for example formed in a single block with the drive member 2 or fixed, for example welded, on the drive member 2. The notches are preferably uniformly distributed over the internal circumference of the ring 20. In the illustrated case, there are five notches, each separated by 72°.
[0033] Preferably, the transmission members 3, 4 are configured to be actuated independently of one another. A first transmission member 3 of the two transmission members 3, 4 is for example intended to be actuated by a watch movement, for example by the watch movement of a timepiece in which the drive device 1 and the watch mechanism driven by the drive device 1 are integrated. A second transmission member 4 of the two transmission members 3, 4 is for example intended to be actuated by a control mechanism that can be actuated on demand by a user of the timepiece, for example by means of a button or any other suitable actuator located on the case of the timepiece.
[0034] With reference to Figure 2, the first transmission member 3 comprises for example a pinion 32 integral in rotation with the flexible arm 31 of the first transmission member 3. The pinion 32 meshes for example with a first rack 39 intended to be driven by a watch movement. When the drive device 1 is integrated into a timepiece, the running of the watch movement of the timepiece drives for example the first rack 39 in a winding movement in rotation in the clockwise direction against the force of a first spring 38, for example a first leaf spring. The clockwise rotation of the first rack 39 drives the counterclockwise rotation of the first transmission member 3.The first spring 38 exerts on the first rack 39 an elastic force tending to return it counterclockwise to a first position of the first rack 39, typically a rest position, which corresponds to a first position of the first transmission member 3. At a time determined by the watch movement, the first rack 39 which has reached a second position corresponding to a second position of the first transmission member 3, typically a winding position, is released by the watch movement and returns counterclockwise to its rest position under the effect of the first spring 38. In doing so, it drives the first transmission member 3 clockwise over at least a fraction of a turn.As explained in more detail below, during this return movement of the first rack 39, the pushing member 30 of the first transmission member 3 comes into contact with a bearing surface 21 of the driving member 2 and pushes it into rotation over a fraction of a turn preferably corresponding to a cycle, for example an animation, display and / or striking cycle, of the watch mechanism driven by the driving device 1.
[0035] The second transmission member 4 comprises, for example, a rack 42 integral in rotation with the flexible arm 41 of the second transmission member 4. The rack 42 meshes, for example, with a second rack 49 intended to be driven by a control mechanism on demand. When a user of the timepiece in which the drive device is integrated actuates the control mechanism, for example by pressing a button on the timepiece, the second rack 49 is driven in a winding movement in rotation in the clockwise direction against the force of a second spring 48, for example a second leaf spring. The clockwise rotation of the first rack 39 causes the counterclockwise rotation of the first transmission member 3.The first spring 38 exerts on the second rack 49 an elastic force tending to return it counterclockwise to a first position of the second rack 49, typically a rest position, which corresponds to a first position of the second transmission member 4. For example, when the user releases the button and / or when the button has traveled a predetermined stroke, the second rack 49, which has reached a second position corresponding to a second position of the second transmission member 4, typically a setting position, is released by the manual control mechanism and returns to its rest position counterclockwise under the effect of the second spring 48. In doing so, it drives the second transmission member 4 clockwise over at least a fraction of a turn.As explained in more detail below, during this return movement of the second rack 49, the pushing member 40 of the second transmission member 4 comes into contact with a bearing surface 21 of the driving member 2 and pushes it into rotation over a fraction of a turn preferably corresponding to a cycle, for example an animation, display and / or striking cycle, of the timepiece mechanism driven by the driving device 1.
[0036] According to the illustrated embodiment, at each return movement of the first rake 39 or the second rake 49, the drive member 2 is rotated by the corresponding transmission member 3, 4 over a determined fraction of a turn, for example a fifth of a turn, or 72 degrees. This fraction of a turn corresponds to a pitch of the drive member 2 which preferably corresponds to the angular pitch between two adjacent bearing surfaces 21 of the drive member 2, or to a multiple of the latter.
[0037] Figures 3 to 7 illustrate the arming movement of the first transmission member 3 and the rotation of the drive member 2 during the return movement of the first transmission member 3.
[0038] Compared to a first position, typically a rest position, of the first and second transmission members 3, 4 illustrated in FIG. 1, FIG. 3 shows the first transmission member 3 partially wound, typically between two activations during the passage of the watch mechanism driven by the drive device 1. During the winding movement of the first transmission member 3, the second transmission member 4 and the drive member 2 are stationary, as long as the control mechanism of the second transmission member 4 is not activated by a user. As explained previously, the first transmission member 3 is driven counterclockwise preferably by the watch movement of the timepiece in which the drive device 1 is integrated.The rotation speed of the first transmission member 3 during the winding movement is determined by an appropriate configuration of the kinematic chain linking the first transmission member 3 to the watch movement, depending for example on the periodicity at which the watch mechanism must be activated, for example every 15 minutes, once an hour, once or twice a day, etc. During the winding movement, the thrust member 30 of the first transmission member 3 slides along the inner periphery of the ring 20 with a friction force determined by the flexibility of its flexible arm 31.
[0039] Figure 4 shows the first transmission member 3 being wound just before its thrust member 30 falls back into the next notch of the ring 20 under the effect of the elastic force of its flexible arm 31. Figure 5 shows a second position of the first transmission member 3 at the end of the winding movement, typically a winding position. Preferably, the angular displacement of the first transmission member 3 during the winding movement is greater than the angular pitch between two notches of the drive member 2 in order to ensure that the thrust member 30 has passed beyond the next notch at the end of the winding movement, as illustrated in Figure 4. In the illustrated embodiment, for example, since there are five notches, the angular pitch between them is 72°.The first transmission member 3 is thus rotated through an angle greater than 72° during the winding movement, preferably through an angle greater than 80°, for example through an angle of 90°.
[0040] At a time determined by the clockwork movement, the first wound transmission member 3 is released and tends to return clockwise, from the second position, typically the winding position, to the first position, typically the rest position illustrated in Figure 1 under the effect of the first spring 38. During the return movement of the first transmission member 3, the pushing member 30 of the first transmission member 3 is inserted into the next notch of the ring 20, as illustrated in Figure 6, and pushes against the corresponding bearing surface 21 to set the drive member 2 in motion in the clockwise direction, as illustrated in Figure 7.During this rotational movement of the drive member 2 under the effect of the first transmission member 3, the thrust member 40 of the second transmission member 4 slides on the inner circumference of the ring 20 with a force determined by the flexibility of the flexible arm 41 of the second transmission member 4, as well as by the nature and surface condition of the materials used for the manufacture of the flexible arm 41 and the ring 20, without preventing this rotation. At the end of the return movement of the first transmission member 3, the drive member 2 has been rotated by an angle corresponding to the angular pitch between two bearing surfaces 21, for example one fifth of a turn, and the first drive member 3 is found in the rest position that it had in Figure 1.
[0041] Figures 8 to 11 illustrate the activation of the drive member 2 by the second transmission member 4, for example an activation on demand between two activations when passing through the first transmission member 3. Figure 8 shows an example of a starting position in which the first transmission member 3 is partially wound and the second transmission member 4 is in a first position, typically its rest position. Initially, the second transmission member 4 is wound, for example by means of a manual control mechanism actuated using a button on the timepiece accessible by a user. During the winding movement, the second transmission member 4 is driven counterclockwise and the pushing member 40 of the second transmission member 4 slides against the inner periphery of the ring 20 until it passes beyond the next notch.The angular displacement of the second transmission member 4 during the winding movement is preferably greater than the angular pitch between two notches of the drive member 2 in order to ensure that the thrust member 40 has passed over the next notch at the end of the winding movement, as illustrated in Figure 9. In the illustrated embodiment, for example, the second transmission member 4 is rotated through an angle greater than 72° during the winding movement, preferably through an angle greater than 80°, for example through an angle of 90°. Once armed, in a second position illustrated in Figure 9, typically a winding position, the second transmission member 4 is released and tends to return clockwise, from its second position, typically its winding position, to its first position, typically its rest position, under the effect of the second spring 48.During the return movement of the second transmission member 4, the pushing member 40 of the second transmission member 4 is inserted into the next notch of the ring 20, as illustrated in Figure 10, and pushes against the corresponding bearing surface 21 to set the drive member 2 in motion in the clockwise direction, as illustrated in Figure 11. During this rotational movement of the drive member 2 under the effect of the second transmission member 4, the pushing member 30 of the first transmission member 3 slides on the inner circumference of the ring 20 with a force determined by the flexibility of the flexible arm 31 of the first transmission member 3, as well as by the nature and surface condition of the materials used for the manufacture of the flexible arm 31 and the ring 20, without preventing this rotation.At the end of the return movement of the second transmission member 4, the drive member 2 has been turned by an angle corresponding to the angular pitch between two bearing surfaces 21, for example a fifth of a turn, and the second drive member 4 is found in the rest position that it had for example in figure 8.
[0042] As illustrated in Figure 2, the flexible arm 31 of the first transmission member 3 is preferably located in a different plane than the flexible arm 41 of the second transmission member 4, thus allowing the movement of each transmission member 3, 4 independently of one another, without risk of collision.
[0043] Preferably, and with reference to Figure 12, the drive device 1 of the invention further comprises a deactivation mechanism making it possible to deactivate the first transmission member 3 in order to allow, for example, the timepiece in which the drive device 1 is integrated to be set without risk of damage to the drive device or triggering by the first transmission member 3. The deactivation mechanism is for example actuated automatically when setting the timepiece, for example via the crown stem (not shown). Alternatively or additionally, the deactivation mechanism can be actuated on demand, for example to allow the user of the timepiece to temporarily deactivate the activation when passing the timepiece mechanism driven by the drive device 1 of the invention.This allows, for example, a user to temporarily deactivate the corresponding animation, display and / or ringing of the timepiece. The deactivation mechanism 5 is actuation on demand, for example, using a button, for example an “on / off” button on the timepiece accessible to the user.
[0044] According to the illustrated embodiment, the deactivation mechanism comprises a deactivation arm 5 acting on the flexible arm 31 of the first transmission member 3, against the restoring force of the latter, to move the thrust member 30 of the first transmission member 3 away from the ring 20 so that it no longer comes into contact with the bearing surfaces 21. The deactivation arm 5 acts on the flexible arm 31 of the first transmission member 3, for example by means of a pin 33 preferably located near the distal end of the flexible arm 31, for example on the corresponding thrust member 30.
[0045] According to the illustrated embodiment, the drive member 2 comprises five bearing surfaces 21 regularly distributed around the axis of rotation 10 over a diameter of the drive member 2. Other embodiments are however possible within the scope of the invention. In particular, the number of bearing surfaces may be different, determined for example by the angular pitch that the drive member must perform to drive the timepiece mechanism during a complete cycle at each activation. The distribution of the bearing surfaces around the axis of rotation may also be irregular, if for example the timepiece mechanism driven by the drive device is configured to perform a sequence of cycles, certain cycles of the sequence of cycles having a different duration.
[0046] It is also conceivable to configure the drive device of the invention so that each time the drive member is activated by the first transmission member and / or by the second transmission member, the drive member is rotated by a step which is a multiple of the angular step between two adjacent bearing surfaces.
[0047] According to the illustrated embodiment, the transmission members are configured to set the drive member rotating clockwise at each step, each actuating member 3, 4 being configured to rotate counterclockwise during the winding movement and clockwise during the return movement. It is of course conceivable within the scope of the invention to configure the transmission members to set the drive member rotating counterclockwise at each step, each actuating member 3, 4 then being configured to rotate clockwise during the winding movement and counterclockwise during the return movement, the orientation of the bearing surfaces of the drive member then being reversed with respect to the orientation of the bearing surfaces 21 of the illustrated drive member 2.
[0048] According to the illustrated embodiment, the transmission members are configured to push the drive member into rotation. Other embodiments are, however, possible within the scope of the invention. For example, it is possible to envisage configuring the transmission members to pull the drive member using a hook cooperating with suitable bearing surfaces of the drive member.
[0049] According to the illustrated embodiment, the transmission members transmit to the drive member, in order to set it in motion, the energy developed by a spring and previously accumulated during the winding of the corresponding transmission member, for example either using a watch movement or using a manual control mechanism. Other energy sources are however conceivable for moving the transmission members. It is for example conceivable that a transmission member is directly driven in a reciprocating movement, for example by a watch movement through a suitable clutch system, by a manual lever, etc.
[0050] The elements of the kinematic chains between the transmission members and the corresponding energy sources may also differ from the rakes and the pinion implemented in the illustrated embodiment. These kinematic chains may, for example, comprise other types of gears and / or other forms of transmission elements, for example pulleys or any other suitable component.
[0051] The drive device has been described above with two transmission members acting on the same drive member and actuated by different means according to different criteria. The drive device can of course comprise, within the scope of the invention, more than two transmission members configured to act on the same drive member in order to set it in motion. According to certain embodiments, for example, the drive device comprises, in addition to the first and second drive members described above, a third drive member configured to set the drive member in motion preferably according to still other criteria. The third drive member is for example actuated by a dedicated mechanism following an external stress, for example an environmental stress such as a pressure variation, an acceleration, etc.
Claims
Claims 1. Drive device (1) for a clockwork mechanism, comprising: - a drive member (2) mounted to rotate about an axis of rotation (10) and configured to drive a clockwork mechanism, the drive member (2) comprising a plurality of bearing surfaces (21); - a first transmission member (3) movable in an arming movement from a first position of the first transmission member (3) to a second position of the first transmission member (3) and in a return movement from the second position of the first transmission member (3) to the first position of the first transmission member (3); - a second transmission member (4) movable in an arming movement from a first position of the second transmission member (4) to a second position of the second transmission member (4) and in a return movement from the second position of the second transmission member (4) to the first position of the second transmission member (4); each transmission member (3; 4) being configured to, during its return movement from its second position to its first position, drive the drive member (2) in rotation by cooperation with a bearing surface (21) of the plurality of bearing surfaces (21);the second transmission member (4) being configured not to block the rotation of the drive device (2) when the first transmission member (3) drives the drive member (2) and the first transmission member (3) being configured not to block the rotation of the drive member (2) when the second transmission member (4) drives the drive member (2).; 2. Drive device (1) according to the preceding claim, the first transmission member (3) and the second transmission member (4) being mounted to be mobile in rotation around the axis of rotation (10) and rotating in one direction of rotation during the winding movement and in the opposite direction of rotation during the return movement.
3. Drive device (1) according to the preceding claim, wherein the first transmission member (3) and the second transmission member (4) each comprise a thrust member (30, 40) for cooperating with the bearing surfaces (21) of the plurality of bearing surfaces (21) to push the drive member (2) in rotation, each thrust member (30, 40) being located at the distal end of a flexible arm (30, 40), the proximal end of each of said flexible arms (30, 40) being mounted in rotation about the axis of rotation (10).
4. Drive device (1) according to one of the preceding claims, further comprising a first spring (38) for moving the first transmission member (3) in its return movement from its second position to its first position and a second spring (48) for moving the second transmission member (4) in its return movement from its second position to its first position.
5. Drive device (1) according to the preceding claim, the first spring (38) and the second spring (48) being configured to be armed during the arming movement of the respective transmission member (3, 4).
6. Drive device (1) according to one of the preceding claims, in which the drive member (2) comprises a toothing.
7. Drive device (1) according to one of the preceding claims, wherein the bearing surfaces (21) of the plurality of bearing surfaces (21) are regularly distributed around the axis of rotation (10) over a diameter of the drive member (2).
8. Drive device (1) according to the preceding claim, wherein the bearing surfaces (21) of the plurality of bearing surfaces are formed on an inner periphery of a ring (20) of the drive member (2), the ring (20) being preferentially located projecting from a board of the drive member.
9. Drive device (1) according to one of the preceding claims, comprising a deactivation mechanism (5) making it possible to decouple the first transmission member (3) from the drive member (2).
10. Timepiece comprising a watch movement and a drive device (1) according to one of the preceding claims, in which the first transmission member (3) is moved in its winding movement from its first position to its second position by the watch movement and the second transmission member (4) is configured to be moved in its winding movement from its first position to its second position by a manual control mechanism.
11. Timepiece according to the preceding claim, in which the deactivation mechanism (5) is actuated automatically when the watch movement is able to receive a time-setting operation.
12. Timepiece according to one of claims 10 and 11, in which the deactivation mechanism (5) can be activated on demand by a user.