Magnetic drive and / or drive mechanism through a watch case

Abstract

One aspect of the invention relates to a watch assembly (2000) comprising a watch (1000), and an adjustment tool (200) pivoting an external drive wheel (20) around an external axis (DE) comprising an external multipolar magnet (21) cooperating, to perform an adjustment, with an internal multipolar magnet comprising an internal control wheel (1) of the watch (1000) pivoting around a first axis (D1) and meshing with the input of a reduction gear (30) whose output meshes with an internally controlled wheel pivoting in the case (10), this adjustment tool (200) comprising means for counting the number of turns of the drive wheel (20) to precisely determine the pivot angle of the internally controlled wheel and / or means for determining and / or visualizing the angular position of the internally controlled wheel.

Description

Technical field of the invention

[0001] The invention relates to a watch assembly comprising at least one watch, and an adjustment tool, for driving without direct contact an internal moving part of the watch through its case, for adjustment and / or energy recharging.

[0002] The invention also relates to a method of using such a clockwork assembly.

[0003] The invention also relates to a watch for the complete watchmaking system of the invention.

[0004] The invention relates to the field of control, adjustment and / or drive mechanisms for watch parts. Technological background

[0005] Many mechanical adjustment systems for wristwatch functions exist, such as pushers, crowns, and the like. However, water resistance must be ensured for any mechanical component passing through the case, for example, by using O-rings or other seals, with the associated challenges.

[0006] Furthermore, certain adjustments to the movement, for example the rate, are best made once the watch is closed, because the casing operation often causes a difference between the adjustment made to the movement and the finished watch.

[0007] For these two main reasons, it is desirable to have a magnetic coupling to rotate an internal component of the watch with a tool external to the watch.

[0008] Document EP4124584 describes a magnetic coupling that can transmit a strong torque inside a watch case. However, it requires that the two opposing magnetic parts be close to each other, which excludes automatic watches and thick case backs.

[0009] Document EP3579061 describes a device for correcting the accuracy of a quartz watch. A magnet rotating beneath the watch directly drives the motor rotor in one direction or the other, depending on the correction required. Summary of the invention

[0010] The invention aims to implement means for transmitting torque or force through a watch casing using a magneto-coupler, in order to perform a mechanical adjustment, for example a rate adjustment, or a condition adjustment, or to perform a winding, or other, once the watch is finished (cased movement).

[0011] The proposal involves placing a small Lavet motor rotor bipolar magnet within the watch movement and using a high-ratio gear train between this magnet and the object to be rotated to achieve the necessary torque. The rotor can then be driven by an external bipolar magnet at a relatively large distance, making it compatible with any type of watch, including automatic watches and watches with thick casebacks.

[0012] For this purpose, the invention relates to a watch assembly according to claim 1.

[0013] The invention also relates to a method of using such a watch assembly, allowing for the correction of mechanical play before proceeding with the actual micrometric adjustment.

[0014] The invention also relates to a watch as defined by claims 22 to 34. Brief description of the figures

[0015] The goals, advantages, and characteristics will be better understood upon reading the detailed description that follows, with reference to the attached figures, where: THE figures 1 to 5 illustrate a watchmaking assembly according to the invention, comprising a timepiece, in particular a watch, and an external adjusting tool, comprising drive means, and arranged for driving a moving part internal to the watch; the figure 1represents such a watchmaking assembly comprising a watch, schematically, partially and in cross-section passing through a first axis of rotation around which, between an upper bridge and a plate, is a rotating mechanism internal to the watch, which carries a drive pinion cooperating with the input of a reduction gear, comprising wheels arranged around two transfer axes; this internal drive mechanism carries an internal multipolar magnet, in particular bipolar, similar to a Lavet motor rotor magnet in the non-limiting application illustrated; this watchmaking assembly also comprises an adjustment tool, comprising a drive mechanism external to the watch, rotating around an external axis, and which carries another external, multipolar magnet, in particular bipolar; the figure 2 represents a detail of the figure 1, in section passing through the axis of rotation of the internal control wheel, and through the two transfer axes of the reduction gear, and showing this internal control wheel, pivoted between two plates or bridges, and carrying a control pinion which meshes with an input wheel of the reduction gear, the latter here comprising, but not limited to, five stages; this compact version of the reduction gear comprises, around two distinct transfer axes, two superpositions of stepped wheels of the same diameter as each other, this reduction gear comprises an output wheel intended to mesh with an internally controlled wheel; there figure 3represents another detail of the same watch, schematically, partially and in cross-section, passing through a second axis of rotation around which a controlled moving part rotates, and through the two transfer axes of the reduction gear: the controlled moving part is also pivoted between the upper bridge and the mainplate, and carries a wheel cooperating with the output moving part of the reduction gear; the figure 4This schematically represents, in a top view, the interaction of the internal control mechanism, the reduction gear (here arranged in a non-limiting manner around two transfer axes), and the driven mechanism (here a snail cam). In this particular, non-limiting arrangement where the reduction gear comprises stepped wheels of the same diameter, the output mechanism of the reduction gear obscures, in this figure, the input mechanism, which is identical to it in planar projection. The upper bridge carries a scale relative to which the angular position of an index on the driven mechanism can be located. figure 5 represents the same assembly, in a different position of the internal control unit, and in a new position of the controlled unit; the figure 6 represents the whole in the position of the figure 4, viewed in the direction of arrow A, along a cross-section passing through the axes of rotation of the internal control unit and the controlled unit; the figure 7 schematically represents, in plan and section along its first axis of rotation, the internal control mechanism, in a simplified version where its multipolar internal magnet is bipolar; figure 8 is a block diagram representing a watch assembly according to the invention, comprising an adjustment tool capable of cooperating with different watches of this assembly, which have the same internal control mechanism, and the same interface with this adjustment tool. Detailed description of the invention

[0016] Patent document EP3252545 describes a magnetic coupling system between the inside and outside of the case. This system engages the winding stem with a rate-setting mechanism by changing the inertia of a special balance wheel. Specifically, an external, encrypted magnetic key, equipped with permanent magnets, rotates an internal ring, fitted with ferromagnetic targets, via magneto-mechanical coupling. The ring is locked against rotation either by axial elastic retention against a stop or by a lock fixed to the axial movement of the stem, thus ensuring its stability against rotational shocks.

[0017] This high-performance system primarily serves to relay the rotational torque of the rod, the sole guarantor of the internal mechanical function, namely the change in inertia of the special balance wheel. It is therefore not capable of providing, on its own, the torque required for the adjustment in question, nor for recharging the energy. The magnetic transmission system must cooperate with another energy supply system, which must also be compatible with the magnetic relay. The entire assembly is thus relatively complex.

[0018] The invention proposes a system related to that described in patent document EP3252545, but independent of any pusher or stem, and therefore capable of producing a direct torque / force. This new system is also encrypted and possesses its own mechanical locking / unlocking function, and its implementation is simplified. The encryption of the invention is linked to the relative position in space of the adjusting tool with respect to the internal control mechanism, both radially and axially, and to the correlation between the number of revolutions imparted to an external drive mechanism within the watch, which is part of the adjusting tool, and the rotation imparted to an internal controlled mechanism within the watch, via an internal control mechanism magnetically cooperating with this external drive mechanism, and via a high-ratio reduction gear.

[0019] The invention consists of placing a small magnet, particularly a bipolar magnet such as a Lavet motor rotor magnet, within the watch movement, and of using a high-ratio gear train between this magnet and the object to be rotated to obtain the necessary torque. The rotor can be driven by an external magnet, particularly a bipolar one, at a relatively large distance.

[0020] The high-ratio gear train is essential, as its use allows for an infinitesimal angular displacement of a controlled internal movement within the watch.

[0021] Indeed, we know from documents EP4092494, CH718656, CH716962 in the name of ETA Manufacture Horlogère Suisse of systems for adjusting a watch in the near field, and from documents CH712578, CH716920, CH719089, EP4174584, CH713306 in the name of Swatch Group Research and Development Ltd, of mechanisms for adjusting the rate, driving a control organ, or even regulating the frequency without contact from outside a watch, these different systems using a magnetic field, but in direct drive, without the possibility of compensating for mechanical play, or of simple micrometric adjustment of such an internally controlled moving part.

[0022] The invention relates to a watch assembly 2000 comprising at least one watch 1000 and at least one setting tool 200, which is arranged to allow non-contact drive of an internal moving part 1 in each watch 1000 of this watch assembly 2000, via a housing 10 in each watch 1000, for setting and / or recharging. The internal control moving part 1 pivots about a first axis D1.

[0023] Each adjustment tool 200 includes means for generating an external magnetic field, rotating around an external axis DE, and which is arranged to cooperate in a complementary way in attraction or repulsion with internal magnetic or ferromagnetic zones 11 that comprise the internal control unit 1 to drive this internal control unit 1 in rotation.

[0024] Each watch 1000 includes an internally controlled mobile 2, which is pivotally mobile about a second axis D2 inside the case 10, and which is arranged to be driven by the internally controlled mobile 1. In the non-limiting embodiment illustrated by the figures, the internally controlled mobile 1 is pivoted between an upper bridge 41 and a plate 42, and the internally controlled mobile 2 is also pivoted between the same upper bridge 41 and plate 42, in order to optimally reduce the volume occupied by the kinematics of driving the internally controlled mobile 2 by the internally controlled mobile 1.

[0025] According to the invention, in each watch 1000, the internal control mobile 1 comprises a control pinion 13 meshing with an input mobile 31 which comprises a reduction gear 30 of which an output mobile 32 meshes with the internal controlled mobile 2.

[0026] More specifically, and as can be seen in the figures, in order to minimize its size, the reduction gear is very compact and comprises stepped gears distributed around at least two distinct axes of rotation, called transfer axes. In the particular, advantageous but not limiting embodiment illustrated in the figures, the reduction gear 30 comprises a first transfer axis D3 and a second transfer axis D4, two superpositions of stepped gears of the same diameter, respectively the first stepped gears 32, 35, 31 around the first transfer axis D3, and the second stepped gears 33, 34, around the second transfer axis D4. Advantageously, the first stepped gears 32, 35, 31, and the second stepped gears 33, 34, are all identical.Advantageously, without the non-limiting embodiment illustrated in the figures, the first stepped wheels 32, 35, 31, and the second stepped wheels 33, 34 are pivoted between the same upper bridge 41 and plate 42, which guide the internally driven moving part 2 and the internally driven moving part 1. The reduction gear 30 thus occupies an extremely small volume. Preferably, and thanks to this arrangement, the reduction gear 30 occupies a volume less than 2% of the internal volume of the housing 10.

[0027] Naturally, depending on the space available in the watch case to house the reduction gear, other arrangements can be used, for example by rotating some of its wheels around the first axis D1 or the second axis D2.

[0028] And, more particularly, the 2000 watch assembly includes means for counting the number of revolutions of the external drive wheel 20 for the precise determination of the pivot angle of said internal controlled wheel 2, and / or means for determining and / or visualizing the angular position of this internal controlled wheel 2. These counting means can also be means for measuring a duration, when, preferably, the external drive wheel 20 is driven in pivoting at a constant speed.

[0029] Indeed, the invention is applicable both to watches 1000 in which the internally controlled mobile 2 is visible, and to watches in which the internally controlled mobile 2 is not visible, hidden by other components of the movement or of the watch.

[0030] THE figures 4 And 5illustrate a variant in which the upper bridge 41, serving as upper guide to the internal control mobile 1, the internal controlled mobile 2, and the shafts carrying the stepped wheels of the reduction gear 30, includes a graduated scale 50 for locating the angular position of an index 25 carried by the internal controlled mobile 2, here a snail cam.

[0031] More specifically, the adjustment tool 200 includes means for relative positioning with respect to the watch case 10 for optimal positioning of the external axis DE parallel to the first axis D1 and according to a center distance E less than or equal to a predetermined value between the external axis DE and the first axis D1; ​​more specifically, and as shown in figure 1 , the predetermined value is that of the mechanical play between the setting tool 200 and the box 10, and the external axis DE and the first axis D1 are then substantially aligned.

[0032] In a first embodiment illustrated by the figures, each adjustment tool 200 includes means for pivoting an external drive unit 20 external to the watch around an external axis DE.

[0033] More particularly, in this first mode, the means for generating a rotating external magnetic field include means for pivoting an external drive unit 20 external to the watch around an external axis DE, and this external drive unit 20 includes at least one external multipolar magnet having external magnetic zones 21N, 21S, with alternating polarities, arranged to cooperate in a complementary way in attraction or repulsion with the internal magnetic zones 11 or ferromagnetic zones that comprise the internal control unit 1 for the rotational drive of the internal control unit 1.

[0034] Each setting tool 200 has external magnetic zones 21N, 21S, with alternating polarities, which are arranged to cooperate in a complementary way, with internal magnetic zones 11N, 11S, or with internal ferromagnetic zones, which comprise the internal control mobile 1, for the drive of the first internal mobile 1.

[0035] Preferably the drive unit 20 includes at least one external multipolar magnet, in particular bipolar, having such external magnetic zones 21N, 21S, with alternating polarities.

[0036] More specifically, the setting tool 200 includes means for axially positioning the external multipolar magnet at a predetermined distance from the case 10 to precisely position it relative to the internal control unit 1 along the direction of the first axis D1. The relative positioning means between the watch case 10 and the setting tool 200 thus define a magnetic distance DM between the closest extreme surfaces of the external magnetic zones 21N, 21S, on the one hand, and the internal magnetic zones 11S, 11N, on the other. It is, of course, advantageous for the magnetic distance DM to be as small as possible.It should be noted, however, that the invention has the advantage of accommodating a magnetic distance DM of a few millimeters, which allows the internal control mechanism to be driven through a thick case back, or through an automatic gear train, or through another mechanism internal to the watch, and which also allows the internal control mechanism to be driven from the top of the watch through the crystal, and thus allows the simultaneous placement on either side of the watch of two adjustment tools with different functions, for example one to adjust the watch's rate, and the other to adjust the watch's condition.

[0037] The invention defines a law, based on parameters consisting of the center distance E, the magnetic distance DM, the nature and dimensions of the external magnetic zones, the nature and dimensions of the internal magnetic zones, and the architecture of the reduction gear, which determines the value of the pivot angle of the internal driven element 2 as a function of the number of revolutions imparted to the external drive element 20. The user has a nomogram or a computer program enabling them to precisely determine the command to be executed to obtain the desired setting.

[0038] In a second embodiment not shown, the means for generating a rotating external magnetic field include means for supplying electricity and distributing current in a plurality of coils in an even number of angularly offset around an external axis DE, for example and not limited to 90° from each other, and arranged to generate a rotating electromagnetic field (in the manner of a brushless electric motor) capable of cooperating in a complementary way in attraction or repulsion with the internal magnetic 11 or ferromagnetic zones that comprise the internal control vehicle 1 for driving the internal control vehicle 1 in rotation. For example, the coils are angularly equidistant, identical, and supplied in sequence in a single direction to generate the rotating field.It is possible in particular to use a tool for testing the mechanical parts of a quartz watch, distributed by "Esslinger ®<" under the identifier "Horotec Watch Turbo Tester ®<" under the reference MSA 19.107 or 64.107, such a tool generates a rotating field at a few tens of revolutions per second.

[0039] It is understood that the invention can find different applications depending on the arrangement of the reduction gear 30. A multiplying gear may be suitable for winding functions, while a dividing gear is particularly well suited to adjustment functions, especially micro-adjustment. This micro-adjustment function, usually performed by the watchmaker, is always delicate, as simply closing the case can alter a precise adjustment that has just been made. Therefore, it is very useful to have a means of micro-adjustment without opening the watch case.

[0040] This last alternative, a dividing gear dedicated to micro-adjustment functions, is illustrated in the figures, in the specific and preferred case where the reduction gear 30 occupies a very small portion of the watch's internal volume, specifically less than 5%, or less than or equal to 2%, with a very low mass relative to the watch's total mass, also less than 5%, or less than or equal to 2%. To achieve extremely precise micro-adjustment, the reduction ratio is high, greater than 1000, or even greater than 10,000. These mass and size constraints naturally lead to a significant limitation of the torque transmitted by the drive train, specifically less than 30 milliNm. The use of microfabrication processes is therefore essential for producing the wheels and pinions of the reduction gear 30.Indeed, to guarantee the insensitivity of the adjustment to any disturbance from an external magnetic field, the reduction gear 30 and the internal controlled moving part 2 are preferably made of non-magnetic material. More specifically, the reduction gear 30 comprises stepped wheels made of non-magnetic material, or stepped wheels made of silicon and / or silicon oxide and / or silicon carbide and / or silicon nitride and / or nickel-phosphorus alloy (with a phosphorus content suitable for remaining non-magnetic, typically greater than or equal to 12%) and / or amorphous or partially amorphous non-magnetic metallic alloy, or polymer, or similar material.

[0041] More specifically, the means for pivoting the drive unit 20 are arranged to drive this drive unit 20 at an angular velocity greater than or equal to 10 revolutions per second, in particular greater than or equal to 40 revolutions per second.

[0042] More specifically, the internal control unit 1 includes at least one magnet, and in particular includes at least one internal multipolar magnet with alternating polarities 11N, 11S, in particular bipolar and including the internal magnetic zones.

[0043] More specifically, the internal control unit 1 is or includes a Lavet motor rotor.

[0044] In particular, the reduction gear 30 and the internally controlled moving part 2 are made of non-magnetic material.

[0045] More specifically, each 1000 watch includes at least one means of holding the internal control element 1 in position, either by applying an elastic mechanical positioning torque and / or by applying a remanent magnetic attraction, to immobilize the internal control element 1 in the absence of external magnetic field stimulation. For example, a ferromagnetic pin near the rotor that constitutes the internal control element 1 creates a positioning torque for the rotor, which is easily overcome during an adjustment phase by applying the external rotating magnetic field.

[0046] More specifically in an unillustrated realization, the first axis D1 and the second axis D2 are aligned.

[0047] In a particular variant not illustrated, the first internal mobile 1 is ferromagnetic. More specifically, the first ferromagnetic internal mobile 1 then has a particular shape, which is arranged to minimize the effects of attraction, rotation or repulsion of a uniform external magnetic field of typically 1.5 Tesla, and to minimize the rotation of the first internal mobile 1, in particular ferromagnetic, under the action of a uniform external magnetic field of typically 1.5 Tesla.

[0048] More specifically, the means for pivoting the drive unit 20 are arranged to drive the drive unit 20 at an angular velocity greater than or equal to 40 revolutions per second.

[0049] More specifically, the 30 reduction gear produces a reduction factor greater than or equal to 10000.

[0050] More specifically, the 30 reduction gear produces a torque multiplication factor greater than 80000.

[0051] It is understood that a user or repairer, outside the manufacturer's network, could manage to rotate the first internal moving part 1 with a single magnet, of any size and strength, and can drive the reduction gear and the second controlled moving part, but this external manipulator does not know the law defining the rotation of the controlled internal moving part, and cannot achieve the expected precise adjustment.

[0052] More specifically, at least one watch in the 1000 watches in the 2000 watch collection is an anti-magnetic watch. More specifically still, every single watch in the 1000 watches in the 2000 watch collection is an anti-magnetic watch.

[0053] More specifically, at least one watch in the 1000 watches in the 2000 watch collection is a mechanical watch. More specifically still, every single watch in the 1000 watches in the 2000 watch collection is a mechanical watch.

[0054] More specifically, at least one watch in the 1000 watches in the 2000 watch collection is an electromechanical or electronic watch. More specifically still, every single watch in the 1000 watches in the 2000 watch collection is an electromechanical or electronic watch.

[0055] More specifically, the second internal mobile 2 is a rate-setting control mobile of a regulating organ that is present in at least one watch 1000. The invention is particularly well suited to the rate setting of a balance wheel and hairspring by modifying the stiffness of said hairspring.

[0056] More specifically, the second internal mobile 2 is a time-setting control mobile for at least one 1000 watch.

[0057] More specifically, the second internal mobile 2 is a control mobile for setting a calendar mechanism that is included in at least one 1000 watch.

[0058] More specifically, the second internal mobile 2 is a winding control mobile for at least one 1000 watch.

[0059] More specifically, the second internal mobile 2 is a control mobile for setting an alarm and / or ringing mechanism that is included in at least one 1000 watch.

[0060] More specifically, the internally controlled mobile 2 is a control mobile for adjusting a calibration mechanism of a sensor for an altimeter or depth gauge or compass function that is included in at least one 1000 watch.

[0061] More specifically, the first internal mobile 1 is invisible to the user of at least one watch 1000.

[0062] More specifically, at least one 1000 watch is devoid of any external mechanical regulating organ passing through the case of the 1000 watch.

[0063] More specifically, at least one 1000 watch is gas and ambient humidity resistant, and its casing has at least one sealing area suitable for carrying out a metallic or ceramic or glass sealing treatment under vacuum or in a neutral gas atmosphere.

[0064] More specifically, at least one 1000 watch is sealed under vacuum so as to be insensitive to internal pressure variations caused by temperature variations.

[0065] More specifically, at least one watch 1000 is equipped with an RFID chip or a passive means of identification allowing direct identification in after-sales of the nature of the watch set 2000 to which the watch 1000 belongs, and of the setting tool 200 to be used.

[0066] It is understood that the cooperation between the box 10 and the adjustment tool 200, and the positioning of the first internal mobile 1, allows for good inviolability of the system, when a third party is unaware of the internal positioning of the internal control mobile 1, and, above all, the law linking the drive of the external drive mobile 20 and the pivoting of the internal controlled mobile 2.

[0067] The invention further relates to a method of using such a 2000 clockwork assembly, allowing for the compensation of mechanical play before proceeding with the actual micrometric adjustment: in a first step, the internal control wheel 1 is subjected to a rotating external magnetic field of intensity less than a first predetermined threshold value, and for a duration less than a first predetermined duration, for a backlash compensation drive in the mechanical kinematic chain between the internal control wheel 1 and the internally controlled wheel 2, and, in a second step, the internal control wheel 1 is subjected to a rotating external magnetic field of intensity greater than a second predetermined threshold value, and for a duration greater than a second predetermined duration, for a synchronous drive of the internally controlled wheel 2 by the internal control wheel 1 through said reduction gear 30.

[0068] By way of non-limiting example, the internal control moving part 1 and the internal driven moving part 2 are pivoted between two bridges less than 2 mm apart, between which are housed five stages of the reduction gear 30, with two-stage Liga wheels with an outer diameter of 3 mm, a gear ratio of 7, and a total reduction of 16800. In planar projection along the direction of the first axis D1, the entire mechanism formed by the internal control moving part 1, the reduction gear 30, and the internal driven moving part occupies a space of approximately 3 mm x 6 mm. The internal control moving part 1 is a Lavet motor rotor and has a diameter of 1.4 mm and a thickness of 0.5 mm. The external drive moving part 20 has a diameter of 20 mm and a thickness of 2 mm and incorporates neodymium-iron-boron magnets.The torque exerted on the internal control element 1 by the external drive element 20 is 3 microNm, the portion of torque allocated to rotor positioning is 0.5 microNm, and the portion of useful torque transmissible to the reduction gear 30 is 2.5 microNm. At the output of the reduction gear 30, the useful torque to the internal controlled element 2, for example a snail cam as seen in the figure. figure 4 The torque is 21 milliNm. In a single-setting application, one revolution of the internally driven wheel 2 corresponds to a 10-second setting. A 0.1-second setting therefore corresponds to 168 revolutions of the internally driven wheel 1. If the motor driving the external drive wheel 20 rotates at 50 revolutions per second, it takes 40 seconds to precisely set 1 second on the internally driven wheel 2. The system volume here represents only 1% to 2% of the caliber's volume.

[0069] The actual size of the system must remain small compared to the main internal functions of the watch.

[0070] The handling of the mechanism according to the invention must be reserved for factory production, or a specialized shop, or an after-sales service approved by the manufacturer, to avoid any problem of unintentional malfunction by the customer or third parties.

[0071] This system can completely replace conventional pushers and stems, in order to produce automatic or other watches that are much more water-resistant than current ones.

Claims

1. A watch assembly (2000) comprising at least one watch (1000) and at least one setting tool (200) arranged to allow non-contact drive of an internal control element (1), pivotally movable about a first axis (D1), which is present in each said watch (1000) of said watch assembly (2000), through a case (10) which is present in each said watch (1000), for the purpose of setting and / or recharging energy, each said setting tool (200) comprising means for generating an external magnetic field rotating about an external axis (DE) and arranged to cooperate in a complementary manner by attraction or repulsion with internal magnetic or ferromagnetic zones (11) which are present in said internal control element (1) to rotate said internal control element (1), each said watch (1000) comprising an internal controlled element (2) pivotally movable about a second axis (D2) inside said box (10),characterized in that , in each said watch (1000), said internal control mobile (1) includes a control pinion (13) meshing with an input mobile (31) which includes a reduction gear (30) of which an output mobile (32) meshes with said internal controlled mobile (2).

2. Watch assembly (2000) according to claim 1, characterized in that said reduction gear (30) includes at least a first transfer shaft (D3) carrying first stepped wheels (32, 35, 31), and a second transfer shaft (D4) carrying second stepped wheels (33, 34).

3. Watch assembly (2000) according to claim 1 or 2, characterized in that said clock assembly (2000) includes means for counting the number of turns of said external magnetic field for the precise determination of the pivot angle of said internally controlled mobile (2), and / or means for determining and / or visualizing the angular position of said internally controlled mobile (2).

4. Watch assembly (2000) according to claim 3, characterized in that an upper bridge (41), serving as upper guidance for said internal control mobile (1), said internally controlled mobile (2), and for shafts carrying stepped wheels (32, 35, 31, 33, 34) which comprise said reduction gear (30), comprises a graduated scale (50) for locating the angular position of an index (25) which is carried by said internally controlled mobile (2).

5. Watch assembly (2000) according to any one of claims 1 to 4, characterized in that said adjustment tool (200) includes means for relative positioning with respect to said box (10) for positioning said external axis (DE) parallel to said first axis (D1) and according to a center distance (E) less than or equal to a predetermined value between said external axis (DE) and said first axis (D1).

6. Watch assembly (2000) according to any one of claims 1 to 5, characterized in thatsaid means for generating a rotating external magnetic field include means for pivoting an external drive unit (20) external to the watch around an external axis (DE), said external drive unit (20) comprising at least one external multipolar magnet having external magnetic zones (21N; 21S), with alternating polarities, arranged to cooperate in a complementary way in attraction or repulsion with said internal magnetic (11) or ferromagnetic zones that include said internal control unit (1) for the rotational drive of said internal control unit (1).

7. Watch assembly (2000) according to any one of claims 1 to 5, characterized in thatsaid means for generating a rotating external magnetic field include means for supplying electricity and distributing current in a plurality of coils angularly offset around an external axis (DE), and arranged to generate a rotating electromagnetic field capable of cooperating in a complementary way in attraction or repulsion with said internal magnetic (11) or ferromagnetic zones comprising said internal control mobile (1) for the rotational drive of said internal control mobile (1).

8. Watch assembly (2000) according to any one of claims 1 to 7, characterized in that said adjustment tool (200) includes means for axially positioning a reference plane of said external magnetic field rotating at a predetermined distance (DM) from said box (10) to position it precisely with respect to said internal control mobile (1) along the direction of said first axis (D1).

9. Watch assembly (2000) according to claims 6 and 8, characterized in that said adjustment tool (200) includes means for axially positioning said at least one external multipole magnet at a predetermined distance (DM) from said box (10) to position it precisely with respect to said internal control mobile (1) along the direction of said first axis (D1).

10. Watch assembly (2000) according to any one of claims 1 to 9, characterized in that said reduction gear (30) occupies a volume less than 2% of the internal volume of said box (10).

11. Watch assembly (2000) according to any one of claims 1 to 10, characterized in that said reduction gear (30) comprises stepped wheels (32, 35, 31, 33, 34) of non-magnetic material, or stepped wheels (32, 35, 31, 33, 34) of silicon and / or silicon oxide and / or silicon carbide and / or polymer.

12. Watch assembly (2000) according to any one of claims 1 to 11, characterized in that said reduction gear (30) comprises stepped wheels (32, 35, 31, 33, 34) which are all identical.

13. Watch assembly (2000) according to any one of claims 1 to 12, characterized in that said pivoting drive means for said drive unit (20) are arranged to drive said drive unit (20) at an angular velocity greater than or equal to 40 revolutions per second.

14. Watch assembly (2000) according to any one of claims 1 to 13, characterized in that said reduction gear (30) produces a reduction factor greater than or equal to 10000.

15. Watch assembly (2000) according to any one of claims 1 to 14, characterized in that said reduction gear (30) produces a torque multiplication factor greater than 80000.

16. Watch assembly (2000) according to any one of claims 1 to 15, characterized in thatsaid internal control unit (1) comprises at least one alternating polarity multipolar internal magnet (11N; 11S) comprising said internal magnetic zones (11), or in that said internal control unit (1) is or comprises a Lavet motor rotor.

17. Watch assembly (2000) according to any one of claims 1 to 16, characterized in that said reduction gear (30) and said internally controlled moving part (2) are made of non-magnetic material.

18. Watch assembly (2000) according to any one of claims 1 to 17, characterized in that Each said watch (1000) includes at least one means of holding said internal control mobile (1) in position by application of an elastic mechanical positioning torque and / or by application of a remanent magnetic attraction, to immobilize said internal control mobile (1) in the absence of stress by an external magnetic field.

19. Watch assembly (2000) according to any one of claims 1 to 18, characterized in that said internal controlled mobile (2) is a rate-setting control mobile of a regulating organ included in at least one said watch (1000), or is a state-setting control mobile of at least one said watch (1000).

20. Watch assembly (2000) according to any one of claims 1 to 19, characterized in that at least one said watch (1000) is equipped with an RFID chip or a passive means of identification allowing direct identification in after-sales of the nature of said watch assembly (2000) to which said watch (1000) belongs, and of said setting tool (200) to be used for setting said watch (1000).

21. Method of using a watch assembly (2000) according to any one of claims 1 to 20, characterized in thatin a first step the said internal control moving part (1) is subjected to a rotating external magnetic field of intensity less than a first predetermined threshold value, and for a duration less than a first predetermined duration, for a backlash compensation drive in the mechanical kinematic chain between said internal control moving part (1) and said internal controlled moving part (2), and in that in a second step said internal control mobile (1) is subjected to an external rotating magnetic field of intensity greater than a second predetermined threshold value, and for a duration greater than a second predetermined duration, for a synchronous drive of said internal controlled mobile (2) by said internal control mobile (1) through said reduction gear (30).

22. Watch (1000) comprising a case (10) containing an internal control moving part (1), pivotally movable about a first axis (D1), and an internal controlled moving part (2) pivotally movable about a second axis (D2), characterized in that , in each said watch (1000), said internal control mobile (1) includes a control pinion (13) meshing with an input mobile (31) which includes a reduction gear (30) of which an output mobile (32) meshes with said internal controlled mobile (2) 23. Watch (1000) according to claim 22, characterized in that said reduction gear (30) includes at least a first transfer shaft (D3) carrying first stepped wheels (32, 35, 31), and a second transfer shaft (D4) carrying second stepped wheels (33, 34).

24. Watch (1000) according to claim 23, characterized in thatan upper bridge (41), serving as upper guidance for said internal control mobile (1), said internally controlled mobile (2), and for shafts carrying stepped wheels (32, 35, 31, 33, 34) which comprise said reduction gear (30), comprises a graduated scale (50) for locating the angular position of an index (25) which is carried by said internally controlled mobile (2).

25. Watch (1000) according to any one of claims 22 to 24, characterized in that said reduction gear (30) occupies a volume less than 2% of the internal volume of said box (10).

26. Watch (1000) according to any one of claims 22 to 25, characterized in that said reduction gear (30) comprises stepped wheels (32, 35, 31, 33, 34) of non-magnetic material, or stepped wheels (32, 35, 31, 33, 34) of silicon and / or silicon oxide and / or silicon carbide and / or polymer.

27. Watch (1000) according to any one of claims 22 to 26, characterized in thatsaid reduction gear (30) comprises stepped wheels (32, 35, 31, 33, 34) which are all identical.

28. Watch (1000) according to any one of claims 22 to 27, characterized in that said reduction gear (30) produces a reduction factor greater than or equal to 10000.

29. Watch (1000) according to any one of claims 22 to 28, characterized in that said reduction gear (30) produces a torque multiplication factor greater than 80000.

30. Watch (1000) according to any one of claims 22 to 29, characterized in that said internal control unit (1) comprises at least one alternating polarity multipolar internal magnet (11N; 11S) comprising said internal magnetic zones (11), or in that said internal control unit (1) is or comprises a Lavet motor rotor.

31. Watch (1000) according to any one of claims 22 to 30, characterized in thatsaid reduction gear (30) and said internally controlled moving part (2) are made of non-magnetic material.

32. Watch (1000) according to any one of claims 22 to 31, characterized in that Each said watch (1000) includes at least one means of holding said internal control mobile (1) in position by application of an elastic mechanical positioning torque and / or by application of a remanent magnetic attraction, to immobilize said internal control mobile (1) in the absence of stress by an external magnetic field.

33. Watch (1000) according to any one of claims 22 to 32, characterized in that said internally controlled moving part (2) is a rate-setting moving part of a regulating organ comprising at least one said watch (1000), or is a state-setting moving part of at least one said watch (1000). Watch (1000) according to any one of claims 22 to 33, characterized in thatat least one said watch (1000) is equipped with an RFID chip or a passive means of identification allowing direct identification in after-sales of the nature of said watch assembly (2000) to which said watch (1000) belongs, and of said setting tool (200) to be used for setting said watch (1000).

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