AUTOMATIC WINDING MECHANISM OF A WRISTWATCH WITH A FLYING MASS

Description

Scope of the invention

[0001] The invention relates to an automatic watch winding mechanism comprising at least one oscillating mass mounted pivotally about a mass axis, said at least one oscillating mass comprising at least one toothed ring with teeth arranged for driving an energy storage device, which comprises said mechanism or with which said mechanism is arranged to cooperate, and at least one inertial mass comprising a non-zero imbalance with respect to said mass axis, and said mechanism comprising rotational guiding means for the rotational guidance of each said oscillating mass which comprise first guiding means arranged to be fixed to a structure of the watch, and second guiding means carried by said at least one oscillating mass.

[0002] The invention further relates to a watch comprising at least one energy storage device arranged to cooperate with such an automatic winding mechanism.

[0003] The invention relates to the field of automatic winding mechanisms for watches. Background of the invention

[0004] On a self-winding watch with a moving oscillating weight, it is often difficult to assemble a peripheral weight onto an automatic movement in a simple way, without resorting to manipulations of ancillary components that carry a risk of damage during casing. Such an assembly requires special machining, such as tapping in gold or hard metal, milling the toothed ring, and assembly operations such as pre-assembling pins on the bearing components (which do not have pre-assembled pins).

[0005] An example of an oscillating mass architecture is described in document CH 704334. Such an oscillating mass comprises a bearing ring, attached to an automatic mass of annular shape, mounted movably via several bearings around the outer diameter of a plate. Summary of the invention

[0006] The invention relates to a self-winding watch mechanism with a high winding power.

[0007] The invention aims in particular to assemble a peripheral mass onto an automatic movement in a simple manner, without having to manipulate auxiliary components which could lead to damage during assembly.

[0008] The invention also aims to simplify manufacturing, as well as to facilitate the integration of display, appearance, or identification components, for example an aesthetically modular bezel that can be decorated as desired, in order to facilitate the personalization of the watch.

[0009] For this purpose, the invention relates to an automatic watch winding mechanism according to claim 1.

[0010] The invention further relates to a watch comprising at least one energy storage device arranged to cooperate with such an automatic winding mechanism. Brief description of the drawings

[0011] Other features and advantages of the invention will become apparent upon reading the detailed description that follows, with reference to the attached drawings, where: there figure 1represents, schematically and in plan view, an automatic winding mechanism according to the invention for reloading a barrel via a reversing mechanism; figure 2 represents, schematically and in perspective, an automatic winding mechanism according to the invention, with a peripheral annular pivoting oscillating mass, comprising, superimposed and visible from the upper surface, an annular flange, a toothed ring, an inertial mass limited to an angular sector, and a bearing ring; the figure 3 represents, in a similar way to the figure 1 Another variant, in which the toothed ring is hidden by the upper flange; the figure 4 represents, schematically and in exploded perspective, the oscillating mass represented in the automatic winding mechanism of the figure 2 ; there figure 5represents, schematically and in cross-section, a first variant of the assembly of the oscillating mass according to the invention; the figure 6 represents, schematically and from above, this first variant; the figure 7 represents, schematically and from below, this first variant; figures 8 to 10 represent, schematically and in cross-section according to different planes of section, this same first variant; the figure 11 represents, in schematic form and from a top view, a second variant of the invention; the figure 12 represents, schematically and from below, this second variant; Figures 13 and 14 represent, schematically and in cross-section according to different planes of section, this same second variant; the figure 15 represents, in schematic form and from a top view, a third variant of the invention; the figure 16 represents, schematically and from below, this third variant; the figures 17 to 19represent, schematically and in cross-section according to different planes of section, this same third variant; the Figure 20 represents, in schematic form and from a top view, a fourth variant of the invention; the figure 21 represents, schematically and from below, this fourth variant; figures 22 to 24 represent, schematically and in cross-section according to different planes of section, this same fourth variant; the figure 25 represents, schematically and from a top view, a fifth variant of the invention; the figure 26 represents, schematically and from below, this fifth variant; figures 27 to 31 represent, schematically, and in cross-section according to different planes of section AA, BB, CC, DD and EE shown on the figure 26 , this same fifth variant; the figure 32 represents, schematically and from a top view, a sixth variant of the invention; the figure 33represents, schematically and from below, this sixth variant; the figure 34 represents, schematically and in cross-section, this sixth variant; the figure 35 represents, schematically and from a top view, a seventh variant of the invention; the figure 36 represents, schematically and from below, this seventh variant; the figure 37 represents, schematically and in cross-section, this seventh variant; figure 38 is a block diagram representing a watch with an energy storage device cooperating with such an automatic winding mechanism. Detailed description of preferred embodiments

[0012] The invention relates to a self-winding watch mechanism 100 comprising at least one oscillating weight 1 mounted pivotally about a mass axis D relative to a plate, either part of the self-winding watch mechanism 100 or part of a watch movement. More particularly, this oscillating weight 1 is a peripheral, annular, or substantially annular weight, which allows the central portion to be freed up to house the watch movement and / or certain complications.

[0013] This at least one oscillating mass 1 comprises at least one toothed ring 2, which has teeth 3 arranged for driving an energy storage device 20, which is part of the mechanism 100, or with which the mechanism 100 is arranged to cooperate. This oscillating mass 1 also comprises at least one inertial mass 4, which has a non-zero imbalance with respect to the mass axis D, i.e., an eccentric center of mass.

[0014] The mechanism 100 includes rotational guiding means, which are arranged for the rotational guiding of each oscillating mass 1, and which include first guiding means arranged to be fixed to a structure of the watch, and second guiding means which are carried by this at least one oscillating mass 1.

[0015] According to the invention, at least one oscillating mass 1 comprises, distinct from one another, superimposed at least two by two, and fixed securely at least two by two, and more particularly to one another, by fixing elements 8 which comprise the oscillating mass 1, constituents which are at least one toothed ring 2, at least one inertial mass 4, at least one movable bearing ring 6 constituting second guiding means.

[0016] More particularly, this at least one oscillating mass 1 comprises, distinct from one another, superimposed at least two by two, and fixed securely at least two by two, and more particularly to one another, by such fixing elements 8, such as screws 9 or the like, constituents which are at least one toothed ring 2, at least one inertial mass 4, and at least one movable bearing ring 6 constituting second guiding means.

[0017] According to the invention, this at least one oscillating mass 1 comprises, distinct from one another, superimposed at least two by two, and fixed securely at least two by two, and more particularly to one another, by such fixing elements 8, constituents which are at least one toothed ring 2, at least one inertial mass 4, at least one movable bearing ring 6 constituting second guiding means, and at least one covering flange 7.

[0018] These fasteners 8, such as screws 9, or pins 21, or similar, are arranged to secure together all or part of its constituents.

[0019] More specifically, at least locally, at least one toothed ring 2, at least one inertial mass 4, and at least one movable bearing ring 6, are superimposed on each other.

[0020] More specifically, at least locally, at least one toothed ring 2, at least one inertial mass 4, at least one said movable bearing ring 6, and at least one flange 7 are superimposed on one another.

[0021] More particularly, at least locally, at least three of these constituents, of distinct nature, are superimposed on one another, along the direction of the mass axis D. More particularly still, at least locally, at least four of these constituents, of distinct nature, are superimposed on one another, along the direction of the mass axis D.

[0022] In particular, the fastening elements 8 are arranged to secure all its components together.

[0023] The invention is illustrated more particularly, and in a non-limiting way, by seven specific variants.

[0024] In a particular embodiment, at least one toothed ring 2, at least one inertial mass 4, at least one movable bearing ring 6, and at least one flange 7, are superimposed on one another.

[0025] More particularly, at least one toothed ring 2, at least one inertial mass 4, at least one movable bearing ring 6, and at least one flange 7, are fixed securely at least two by two, and more particularly to each other, by fastening elements 8 which comprise the oscillating mass 1.

[0026] By way of illustration not covered by the invention, at least one toothed ring 2 and at least one movable bearing ring 6 constitute the upper and lower surfaces of this at least one oscillating mass 1 and enclose the other constituents that comprise this oscillating mass 1.

[0027] More specifically, at least one flange 7 and at least one movable bearing ring 6 constitute the upper and lower surfaces of the oscillating mass 1, and enclose the other constituents of this oscillating mass 1.

[0028] More specifically, the fastening elements 8 include screws 9, a head 91 of which cooperates in a locking support with a toothed ring 2 or respectively a bearing ring 6, and a thread 95 cooperates with a tapped hole 605 or 705 which includes a movable bearing ring 6 or respectively a toothed ring 2.

[0029] More specifically, the fastening elements 8 include screws 9, a head 91 of which cooperates in a locking support with a flange 7 or respectively a bearing ring 6, and a thread 95 cooperates with a tapped hole 605 or 705 which includes a movable bearing ring 6 or respectively a flange 7.

[0030] More particularly, the flange 7 has tenons 71, which are housed in passages that include at least one toothed ring 2, and / or at least one inertial mass 4, and / or at least one movable bearing ring 6; these tenons 71 are arranged to cooperate with the fixing elements 8, to ensure the solid assembly of all the constituents of the oscillating mass 1; in particular these tenons 71 are tapped to receive screws 9.

[0031] There figure 9 illustrates a variant where the toothed ring 2 has the pin 21, with guide holes 79 in the flange 7 of a collar 63 made on the outer part of the movable bearing ring 6.

[0032] There Figure 10 illustrates another variant where the inertial mass 4 carries another pin 210, which is housed in a guide hole 69 of a collar 63 made on the outer part of the movable bearing ring 6.

[0033] More specifically, flange 7 is designed to be visible to the watch wearer. This flange 7 can be made of any material, allowing for a wide range of decorative possibilities, such as guilloché work, engraving, enameling, inlay, or other techniques, in the preferred case where this flange 7 is visible to the wearer within the watch. It allows the rest of the mechanism to be concealed, if desired. Thus, the figure 2 illustrates a mechanism where the toothed ring 2 is visible to the user, while the figure 3 illustrates a variant where the flange 7 covers the teeth 3 of this toothed ring 2.

[0034] By way of illustration not covered by the invention, the toothed ring 2 is arranged to be visible to the user of the watch, and becomes decorative.

[0035] More specifically, at least one movable bearing ring 6 has an internal or external movable groove 61 for the circulation of balls 90 or rollers. This groove 61 is described as movable because it is associated with the assembly that pivots, as opposed to a groove 62 described as fixed, which constitutes the opposite guide track for these balls or rollers. The fixed groove 62 is static and attached to a structural element of the watch, such as the mainplate, case, or other component.

[0036] In one construction variant, as seen on the Figures 13 and 14 , this movable groove 61 can result from the juxtaposition of the movable bearing ring 6 with one of the other constituents of the oscillating mass 1, each comprising half of this movable groove 61.

[0037] Thus, more specifically, and as can be seen on the Figures 13 and 14, a movable bearing ring 6 has a first conical bearing face 68 defining half of an internal or external movable groove 61 for the circulation of balls 90 or rollers, and a toothed ring 2 has a second conical bearing face 28 defining, in a service position where the second conical bearing face 28 is opposite to the first conical bearing face 68, the other half of the internal or external movable groove 61.

[0038] Thus, more particularly, the first guiding means are arranged to be fixed to a fixed part 30 arranged to be fixed to a structure of the watch, or constitute such a fixed part 30, and include a fixed bearing ring 36, which is opposed to the movable bearing ring 6 for receiving balls 90 or rollers for guiding the rotation of this oscillating mass 1.

[0039] More specifically, in a non-limiting construction variant illustrated in particular by the figures 19 , 20 , 23, 24 , And 27 à 31 , the fixed bearing ring 36 comprises a first part 361 and a second part 362 stacked one on top of the other, each comprising a conical bearing surface 66, respectively 67, constituting half of an external or internal fixed groove 62.

[0040] More specifically, at least one inertial mass 4 is clamped between a toothed ring 2 and a flange 7.

[0041] More specifically, at least one inertial mass 4 is clamped between a movable bearing ring 6 and a flange 7.

[0042] More specifically, at least one inertial mass 4 is clamped between a movable bearing ring 6 and a toothed ring 2.

[0043] More specifically, at least one toothed ring 2 is clamped between a movable bearing ring 6 and a flange 7.

[0044] More specifically, at least one inertial mass 4 is clamped between a screw head 91 and a flange 7.

[0045] More specifically, at least one inertial mass 4 is clamped between a screw head 91 and a toothed ring 2.

[0046] More specifically, at least one said inertial mass 4 is clamped between a screw head 91 and a movable bearing ring 6.

[0047] More particularly, the oscillating mass 1 includes at least one indexing pin 21 for the toothed ring 2, this pin 21 cooperating with a locating hole 29, 49, 69, which is included in a toothed ring 2 and / or an inertial mass 4 and / or a bearing ring 6.

[0048] In other assemblies of the present invention, within the oscillating mass 1 or to secure one of its elements with a plate, a screw 9 or a screw with a bearing 900 cooperates with a thread 905 or 906, or with such a locating hole 29, 49, 69, which is then a tapped hole.

[0049] In another type of assembly, and as seen on the figure 34 illustrating a sixth variant, two of the constituents of the oscillating mass, or one constituent of the oscillating mass and the plate, are assembled together, resting on shoulders 901, 902, which they have, and are secured by a screw with a bearing surface 900, screwed into a thread 905 provided in one of them, and whose head bears both on a bearing face 903 of one, and on a bearing face 904 of the other.

[0050] In yet another type of assembly, and as seen on the figure 37illustrating a seventh variant, at least two of the constituents of the oscillating mass, or one constituent of the oscillating mass and the plate, are assembled together, supported on shoulders 901 and 902 which they comprise, and are joined together by the cooperation of a nut with bearing surface 980, guided in a bore 907 through both of them and whose head of this nut with bearing surface 980 bears on an external bearing face 908 of one of them, and whose threading cooperates with the thread of a screw with bearing surface 900, whose head bears on an external bearing face 904 of another of them, these respective external bearing faces being the outermost of the assembly of these at least two constituents, or respectively of one of these constituents and the plate.

[0051] More specifically, at least two of the constituents of the oscillating mass 1 are retained radially to each other, with respect to the mass axis D, by at least one dovetail joint 604, or other similar retaining joint such as a tee-groove joint or other.

[0052] The invention further relates to a watch 1000 comprising at least one energy storage device 20 arranged to cooperate with such a mechanism 100.

[0053] Thus, in the first variant, illustrated in Figures 5 to 10The entire peripheral oscillating mass 1 is broken down into several distinct parts, allowing the manufacturing of its components to be separated. Thus, the first guiding means, the second guiding means, and the balls 90 in a specific, non-limiting application, together constitute a ball bearing, possibly including a cage 65 or a basket, which is separate from the toothed ring 2, the heavy sector constituting the inertial mass 4, and the flange 7, which advantageously forms a decorative ring, a decorative disc, or a trim piece. Each of the components of the oscillating mass is simplified to facilitate its manufacture and assembly.In particular, this arrangement avoids the need to tap hard materials such as ceramics, carbides, or the like, or soft and precious materials like gold, or to eliminate unnecessary stamping or milling operations, as the geometry of each component is strictly limited to its specific function and the constraints of assembly with the other components. These constraints are minimized by the design of the oscillating mass according to the invention. Each component has a very simple geometry, and machining is inexpensive; the toothed ring 2 can be directly stamped, the inertial mass 4 has only smooth surfaces and, generally, no drilling or tapping is required, while the bearing ring 6 can be made of steel using conventional machining without any particular complexity.

[0054] The ball bearing comprises a first monobloc part, including one of the two grooves 61, 62, for the bearing of the balls 90, and a second part formed of two stacked components, which, by convention, are here always numbered 361, 362, whether they are fixed or movable, and which together define the other of the grooves 62, 61, for the bearing of the balls 90.

[0055] To easily ensure the relative geometric orientation of the components, at least one pin 21, and more particularly several pins 21, is fixed or are fixed between certain components, for example between the inertial mass 4 and the bearing ring 6 as seen on the Figure 10 of this first variant, or between the inertial mass 4 and the toothed ring 2 as visible on the figure 19for the third variant, which will be detailed later, or otherwise. Thus, in particular, the ball bearing is spared any additional assembly. The inertial mass 4 is held in place between a collar 63 made on the outer part of the bearing ring 6 on the one hand, and on the other hand, either by the flange 7, or by the toothed ring 2 bearing on a counterbore 43 of the inertial mass 4, these simple configurations being in no way limiting.

[0056] In this first variant, the moving part is located outside the ball bearing, relative to the axis of mass D. The entire oscillating mass 1, including this bearing, is fixed to the structure of the watch or its movement by means of screws from the inside, into three recesses 31 in a fixed part 30 of the ball bearing, spaced 120° apart in the illustrated, non-limiting variant. These screws are accessible from the back of the watch, making the oscillating mass 1 independent of the rest of the movement, like a traditional oscillating mass.

[0057] In the second variant, illustrated by the figures 11 to 14The moving part is still outside the ball bearing; the movable bearing ring 6 has a first conical bearing face 68, which defines half of an internal or external movable groove 61 for the circulation of balls 90 or rollers, and the toothed ring 2 forms a ring which has a second conical bearing face 28 defining, in a service position where the second conical bearing face 28 is opposite the first conical bearing face 68, the other half of the internal or external movable groove 61. This machined ring is thus integrated into the bearing, which optimizes the overall thickness. This also allows for a more efficient lifting action because the inertial mass 4 can be larger. The flange 7 is screwed on from below.

[0058] In the illustration by the figure 14, the inertial mass 4 is driven into the bearing ring 6. Complementary shapes machined in each part in the manner of the dovetail joint technique, or similar, ensure radial strength, here illustrated non-limitingly by a dovetail joint 604.

[0059] The flange 7 here has three tenons 71 protruding from the material with blind threads allowing its orientation and assembly by the screws 9. As visible on the figure 13 , the screw 9 is advantageously a screw with a bearing surface, the lower part of whose head 91 rests on a shoulder of the inertial mass 4 and / or on another shoulder of the bearing ring 6; naturally a spring washer, or even an O-ring, can be interposed in the stacking of the constituents of the oscillating mass 1 to take up the play and ensure good support.

[0060] In the third variant, the moving part is inside the ball bearing. The fixed part is outside, and the attachment, under the oscillating weight 1, is on the dial side. This option frees up the center of the caliber, leaving more space for the other components.

[0061] In the same way as for the first variant 1, the ball bearing does not have pre-assembled components. The orienting pins 21 are driven into the inertial mass 4. The latter is held in place between a flange 63 of the bearing ring 6, on the one hand, by the cooperation of a bearing surface 406 of the inertial mass with a complementary bearing surface 606 of the bearing ring 6, and the toothed ring 2 on the other hand by the cooperation of a bearing surface 204 of the ring 2 and a complementary bearing surface 402 of the inertial mass 4, which toothed ring 2 is tightened by the screw 9 whose countersunk head 91 bears against the flange 7, and cooperates with a threaded hole 605 of the bearing ring 6. A lower surface 206 of the toothed ring 2 bears against an upper surface 602 of the bearing ring 6.

[0062] The fourth variant is derived from the third variant and has its moving part inside the ball bearing. The mass is attached externally, on the bottom side. It is secured to the movement by three screws. Lugs on the periphery of the mass allow for coupling.

[0063] In this fourth variant, the toothed ring 2 is also separated from the ball bearing to facilitate manufacturing and assembly. The inertial mass 4 is in two parts 41 and 42 to simplify manufacturing. An internal or external groove in 6040 steel is machined on the bearing ring 6 and the inertial mass 4 to ensure the radial retention of the latter.

[0064] A fifth variant is illustrated by the figures 25 to 31This fifth variant is devoid of a flange 7, and comprises only the other constituents of the oscillating mass 1. The bearing ring 6 constitutes the outer part of a ball bearing, with balls 90. The toothed ring 2 is fixed to the bearing ring 6 by screws 9. The bearing ring 6 has substantially flat wings 64, arranged to fit into recesses 46 in the inertial mass 4, and to ensure the axial restraint of the latter, along the direction of the axis of mass D. The screws 9 are tightened, some in bosses 609 in the bearing ring 6 at its periphery, and others either directly in threaded holes in the inertial mass 4, or through the inertial mass 4 and in cooperation with threaded holes in the wings 64 as illustrated. The bearing ring 6, in the least expensive variant shown, has a unique external groove for guiding the balls 90.The inner part of the ball bearing comprises a first part 361 and a second part 362 stacked one on top of the other, each comprising a conical bearing surface, each constituting half of an inner groove for guiding the balls 90.

[0065] In a non-limiting form of realization and as seen on the figure 28The second upper part 362 is attached to the first lower part 361 by a flange 710 forming a fixed portion 30 arranged to be fixed to a watch structure by means of screws 900 inserted into flange holes 709 and screwed into threaded holes 906, and in particular with reference to positioning pins. Advantageously, the first part 361 has, opposite its conical ball guide bearing surface, a second small conical adjustment bearing surface, substantially at the same angle as the first, which cooperates with a complementary small conical adjustment bearing surface in the second part 362. One of these two conical adjustment bearing surfaces is limited by a cylindrical stop bearing surface, so as to perfectly ensure the geometry of the internal ball guide groove in the assembled position.

[0066] In this fifth variant, the moving part of the oscillating mass is located outside the ball bearing, and more specifically outside the cage diameter. This necessitates assembly after the movement is inserted into the housing and requires specific clearance within the housing. The inertial mass 4 is positioned on the bearing through the interaction of its clearances 46 with the flanges 64 of the bearing ring 6, thus ensuring axial and radial retention.

[0067] The oscillating weight assembly 1 is secured by three flanges screwed in with screws at 900 mm, in the manner of conventional watch case fittings. This operation is performed after the movement is coupled to the case, before the case back is fitted. More specifically, in this fifth variant, two positioning pins are used.

[0068] A particular realization of the fifth variant, illustrated by the Figures 27 and 28 , features a coherent internal bearing assembly, an assembly of the heavy part, i.e., the inertial mass 4, which is this time pinned and not dovetailed, which requires drilling the inertial mass but is less expensive than machining the profile into a dovetail. The connection to the plate is similar to that illustrated on the figures 25 to 31 , but is now made more visible to the user.

[0069] There figure 28 shows the bearing surface 903 of the screw with bearing surface 900 bearing on the flange 710, which bears, by its lower face, on an upper bearing surface 904 of the second part 362 of the fixed bearing ring 36, a lower shoulder 901 of which cooperates in bearing with an upper shoulder 902 of the plate. figure 30as for it shows the support between two complementary surfaces 1902 of the inertial mass 4 and 1901 of the mobile bearing ring 6.

[0070] A sixth and seventh variant are similar to this fifth variant with regard to the assembly and mounting of the inertial mass 4; they differ in their connection to the plate, and the details of their assemblies are described above: The sixth variant features a plate-shaped mounting system and direct screw mounting; the inertial mass is guided by drilling. The seventh variant features a screw-based mounting system and screw mounting.

[0071] The invention offers numerous advantages. In all cases, the lifting power is improved thanks to the large diameter of the peripheral oscillating mass thus created, and the overall size is reduced compared to known devices, thanks to a significant decrease in total thickness. Manufacturing is simplified, its cost is lowered, and assembly is easy. The aesthetic appearance of the flange is not affected by the technical constraints.

[0072] The first variant is distinguished in particular by its ease of manufacture, thanks to its independent components, and by its ease of assembly, as the oscillating weight according to the invention can be assembled without special tools. The flange is particularly well-suited to versatile decorative applications.

[0073] The second variant is distinguished in particular by its high lifting power. The overall thickness can be significantly reduced.

[0074] The third variant is distinguished by the fact that the aesthetic aspect of the volume contained within the oscillating mass is not impacted by the technical constraints, and also by the fact that the fixings to the movement enter into the volume of the mass.

[0075] The fourth variant is also distinguished by the fact that the aesthetic aspect of the volume contained within the oscillating mass is not impacted by the technical constraints, and also by the fact that the winding power may be optimum.

[0076] The fifth variant, thanks to its external moving part, allows for maximum optimization of the mass's lifting power. The pivoting section outside the housing diameter maximizes the available space at the center of the movement for all the remaining components. The flanged attachment of the fixed bearing ring simplifies assembly after the movement has been fitted.

[0077] The sixth and seventh variants ensure good positioning and secure attachment of the moving assembly to the plate.

[0078] In variants with a flange 7, it can be made of precious metal, at a moderate cost due to the low thickness that can be given to it, since the rigidity of the oscillating mass is essentially ensured by the movable bearing ring 6 and by the toothed ring 2.

[0079] In summary, thanks to the invention, the manufacture of the oscillating mass is simplified, and in particular there is no tapping in gold or hard metal, the toothed ring has no milling, the constituents specific to the bearing did not require pre-assembly of pin.

Claims

1. An automatic watch winding mechanism (100) comprising at least one oscillating mass (1) fitted so as to pivot around a mass axis (D) relative to a plate, said at least one oscillating mass (1) comprising at least one toothed ring (2) with toothing (3) arranged to drive an energy storage device (20), comprised in said mechanism (100) or with which said mechanism (100) is designed to engage, and at least one inertial mass (4) comprising a non-zero unbalance relative to said mass axis (D), and said mechanism (100) comprising rotational guide means for rotationally guiding each said oscillating mass (1), which comprise first guide means designed to be fastened to a structure on the watch, and second guide means carried by said at least one oscillating mass (1), characterised in that at least one said oscillating mass (1) comprises, separate from each other, superimposed at least in pairs, and securely fastened at least in pairs by fastening elements (8) comprised in said at least one oscillating mass (1), constituent parts which are at least one said toothed ring (2), at least one said inertial mass (4), at least one mobile bearing ring (6) constituting said second guide means, and at least one covering flange (7); in that at least one said covering flange (7) and at least one mobile bearing ring (6) constitute the upper and lower surfaces of said at least one oscillating mass (1) and enclose the other said constituent parts comprised in said at least one oscillating mass (1), and in that at least one said toothed ring (2) is clamped between a said mobile bearing ring (6) and a said flange (7).

2. The mechanism (100) according to claim 1, characterised in that at least one said toothed ring (2), at least one said inertial mass (4), and at least one said mobile bearing ring (6), are superimposed on each other.

3. The mechanism (100) according to claim 1, characterised in that at least one said toothed ring (2), at least one said inertial mass (4), at least one said mobile bearing ring (6), and at least one said flange (7) are superimposed on each other.

4. The mechanism (100) according to any of claims 1 to 3, characterised in that at least one said toothed ring (2), at least one said inertial mass (4), and at least one said mobile bearing ring (6), are securely fastened to each other by said fastening elements (8).

5. The mechanism (100) according to claim 1, characterised in that at least one said toothed ring (2), at least one said inertial mass (4), at least one said mobile bearing ring (6), and at least one said flange (7) are securely fastened to each other by said fastening elements (8).

6. The mechanism (100) according to any of claims 1 to 5, characterised in that said fastening elements (8) comprise screws (9) in which a head (91) engages as a locking support with a said toothed ring (2) or respectively a said bearing ring (6), and a threading (92) engages with a tapping comprised in a said mobile bearing ring (6) or respectively a said toothed ring (2).

7. The mechanism (100) according to claim 1, characterised in that said fastening elements (8) comprise screws (9) in which a head (91) engages as a locking support with a said flange (7) or respectively a said bearing ring (6), and a threading (95) engages with a tapping (605; 705) comprised in a said mobile bearing ring (6) or respectively a said flange (7).

8. The mechanism (100) according to claim 1, characterised in that said flange (7) comprises studs (71) engaged in recesses comprised in said at least one said toothed ring (2), and / or said at least one said inertial mass (4), and / or said at least one mobile bearing ring (6), said studs (71) being arranged to engage with said fastening elements (8) to ensure that all said constituent parts of said oscillating mass (1) are securely assembled.

9. The mechanism (100) according to claim 1, characterised in that said flange (7) is arranged to be visible to the user of the watch.

10. The mechanism (100) according to claim 1, characterised in that at least one said inertial mass (4) is clamped between a said toothed ring (2) and a said flange (7).

11. The mechanism (100) according to claim 1, characterised in that at least one said inertial mass (4) is clamped between a said mobile bearing ring (6) and a said flange (7).

12. The mechanism (100) according to any of claims 1 to 11, characterised in that at least one said inertial mass (4) is clamped between a said mobile bearing ring (6) and a said toothed ring (2).

13. The mechanism (100) according to claim 1, characterised in that said fastening elements (8) comprise screws (9) comprising a head (91), and in that at least one said inertial mass (4) is clamped between a said screw head (91) and a said flange (7).

14. The mechanism (100) according to any of claims 1 to 13, characterised in that said fastening elements (8) comprise screws (9) comprising a head (91), and in that at least one said inertial mass (4) is clamped between a said screw head (91) and a said toothed ring (2).

15. The mechanism (100) according to any of claims 1 to 14, characterised in that said fastening elements (8) comprise screws (9) comprising a head (91), and in that at least one said inertial mass (4) is clamped between a said screw head (91) and a said mobile bearing ring (6).

16. The mechanism (100) according to any of claims 1 to 15, characterised in that said at least one oscillating mass (1) comprises at least one pin (21) for indexing said toothed ring (2), engaging with a positioning hole (29; 49; 69) comprised in said toothed ring (2) and / or in said inertial mass (4) and / or in said bearing ring (6).

17. The mechanism (100) according to any of claims 1 to 16, characterised in that at least two of said constituent parts of said oscillating mass (1) are held radially to each other, relative to said mass axis (D), by at least one dovetail assembly (604) or retaining assembly.

18. The mechanism (100) according to any of claims 1 to 17, characterised in that at least two of said constituent parts of said oscillating mass (1), or one of said constituent parts of said oscillating mass (1) and the plate, are assembled to each other, bearing on shoulders (901, 902) comprised thereon, and are attached by a shoulder screw (900), screwed into a tapping (905) formed in one of them, and the head of which bears both on a bearing face (903) of the one, and on a bearing face (904) of the other.

19. The mechanism (100) according to any of claims 1 to 18, characterised in that at least two of said constituent parts of said oscillating mass (1), or one of said constituent parts of said oscillating mass (1) and the plate, are assembled to each other, bearing on shoulders (901, 902) comprised thereon, and are attached by the engagement of a shoulder nut (980) guided in a hole (907) running through both of them and in which the head of said shoulder nut (980) bears on an outer bearing face (908) on one of them, and in which the tapping of said shoulder nut (980) engages with the threading of a shoulder screw (900), the head of which bears on an outer bearing face (904) on another of them, said respective outer bearing faces (908, 904) being the outermost faces of the assembly of these at least two constituent parts, or respectively of one of these constituent parts and of the plate.

20. The mechanism (100) according to any of claims 1 to 19, characterised in that said first guide means comprise a fixed bearing ring (36) opposite said mobile bearing ring (6) for holding balls (90) or runners for rotationally guiding said oscillating mass (1).

21. The mechanism (100) according to any of claims 1 to 20, characterised in that at least three of said constituent parts of said oscillating mass (1), which are distinct in nature, are superimposed on each other in the direction of said mass axis (D).

22. The mechanism (100) according to claim 21, characterised in that at least four of said constituent parts of said oscillating mass (1), which are distinct in nature, are superimposed on each other in the direction of said mass axis (D).

23. A watch (1000) comprising at least one energy storage device (20) arranged to engage with a mechanism (100) according to any of claims 1 to 22.