Device for assembling a timepiece oscillator

Abstract

Assembly device (200) of an oscillator (100) comprising a balance spring (1) on an assembly (300) or on a movement (300) of a timepiece (400), the assembly device comprising: - a first pivot blank (5) of an oscillator (100), - a second pivot blank (6) of an oscillator (100), - a first positioning element (7a, 7b) of the first blank (5) relative to the second blank (6), the first positioning element (7a, 7b) being arranged and / or configured so as to position a balance spring (1) relative to the first blank (5) and / or relative to the second blank (6), in a plane of the assembly (300) or of the movement (300).

Description

[0001] The invention relates to a device for assembling a watch oscillator. The invention also relates to an assembly, in particular a watch movement, comprising such a device. The invention also relates to a timepiece comprising such an assembly device or such an assembly or such a watch movement.

[0002] The traditional assembly of a balance-spring oscillator within a watch movement is carried out by means of a set of parts prearranged on a balance bridge and which are designed to allow the rotational movement of the outer end of the balance spring, in order to allow easy alignment of the escapement so that at the dead center, or equilibrium position of the oscillator, the center of a balance plate pin is on a line connecting the pivots of the anchor and the balance. To do this, the outer end of the balance spring is usually fixed to the balance bridge by means of a movable fixing support, for example a stud holder, which is movable in rotation relative to the balance bridge or the plate.

[0003] Document EP2799937 describes, for example, a solution for assembling a balance-spring oscillator in which an outer end of a balance spring is fixed to a balance bridge by means of a movable fixing support which can rotate relative to the balance bridge. The movable fixing support is here secured to a damper body which can rotate by means of a specific drive zone.

[0004] Document EP2565730 discloses an escapement module designed to pivot the components of the regulating organ, which is shaped to fit directly onto the movement plate. All the components of the regulating organ are arranged so that they can be assembled automatically from a single side of the module. This device is devoid of an index assembly and of any device allowing the position of the outer end of the balance spring to be mechanically adjusted. The outer end of this spring is secured to a lower bridge of the module by means of a stud fixed to a receiving surface of the bridge, for example by driving, welding or gluing.

[0005] Document EP2570868 describes an oscillator comprising a balance spring whose outer end can be secured to a fixed part of the movement, for example the plate, the anchor bridge, or the balance bridge. In the more particularly described embodiment, a stud secured to the outer end of the balance spring is provided to be inserted into a hole in the plate, and to be held axially by a plate screwed onto the plate.

[0006] Dismantling the hairsprings known from documents EP2565730 and EP2570868 can be tricky and can lead to a risk of breakage, particularly if these hairsprings are made of a fragile material such as silicon. Furthermore, such solutions for assembling the outer end of a hairspring present a precision of assembly of the balance-spring oscillator within the movement which is not optimal. Finally, the assembly of the hairspring which is more particularly described in document EP2570868 involves mounting the hairspring under the balance, which does not allow the hairspring to be highlighted and made particularly visible within the balance-spring oscillator.

[0007] The aim of the invention is to provide a device for assembling a watch oscillator making it possible to improve the devices for assembling watch oscillators known from the prior art. In particular, the invention proposes a device for assembling an oscillator improving the integration of an oscillator within a movement, more particularly of a balance spring of an oscillator within the movement, and this independently of any movable fixing support movable in rotation relative to a balance bridge or a plate in a plane of the movement.

[0008] According to a first aspect of the invention, a device for assembling a clock oscillator is defined by claim 1.

[0009] Embodiments of the assembly device are defined by claims 2 to 10.

[0010] According to the first aspect of the invention, an assembly is defined by claim 11.

[0011] Embodiments of the assembly are defined by claims 12 to 14.

[0012] According to the first aspect of the invention, a timepiece is defined by claim 15.

[0013] The attached drawings represent, by way of example, an embodiment of a timepiece. There figure 1 is a view of an embodiment of a timepiece. The figure 2 is a view of the embodiment of the figure 1 in which the balance bridge was deposited. The figure 3 is a view of the embodiment in section according to plan III-III of the figure 1 . There figure 4 is a partial detailed view of the embodiment in section according to plan III-III of the figure 1 .

[0014] An embodiment of a timepiece 400 is described below in detail with reference to figures 1 à 4 .

[0015] The timepiece 400 is for example a watch, in particular a wristwatch. The timepiece 400 comprises an assembly 300, in particular a watch movement 300, intended to be mounted in a timepiece case or box in order to protect it from the external environment. The watch movement 300 may be a mechanical movement, in particular an automatic movement, or a hybrid movement.

[0016] The assembly 300, in particular the watch movement 300, comprises an assembly device 200 and an oscillator 100 comprising a balance spring 1, in particular an oscillator 100 comprising a balance wheel 9 and a balance spring 1 mounted on an axis or shaft 10. The axis 10 is advantageously a pivot axis of the oscillator, in particular of the balance wheel 9. The oscillator can thus be pivoted around a geometric axis A1.

[0017] The assembly device 200 of the oscillator 100 makes it possible to assemble, that is to say makes it possible to maintain and / or guide, in particular to guide in pivoting, the oscillator on or in the assembly 300, or on or in the movement 300.

[0018] The assembly device 200 comprises: a first blank 5 for pivoting the oscillator 100, a second blank 6 for pivoting the oscillator 100, a first positioning element 7a, 7b of the first blank 5 relative to the second blank 6.

[0019] The first positioning element 7a, 7b is arranged and / or configured so as to position the spiral spring 1 relative to the first blank 5 and / or relative to the second blank 6, in a plane P of the assembly 300 or of the movement 300.

[0020] The plane P is advantageously a plane along which the movement extends, in particular a plane parallel to the plane along which the blanks of the movement extend, in particular the first and second blanks 5 and 6, or parallel to the plates of the wheels of a finishing train of the movement or perpendicular to the axes of the wheels of a finishing train of the movement or perpendicular to the pivot axis A1 of the oscillator 100.

[0021] Preferably: the first blank 5 is a balance bridge 5, and / or the second blank 6 is a plate 6.

[0022] The assembly device 200 may further comprise a third blank 8. The third blank is for example a protective bridge 8. This protective bridge may in particular at least partially surround the balance wheel 9 in order to protect and improve the aerodynamics of the oscillator 100. The third blank 8 may be interposed or inserted between the first and second blanks. More particularly, the third blank 8 may be interposed or inserted between the balance spring 1 and the second blank 6. Alternatively, the third blank 8 may be interposed or inserted between the balance spring 1 and the first blank 5. The third blank is preferably held clamped between the first and second blanks.

[0023] In the embodiment shown, an external and / or massive and / or rigid part 12 of the balance spring 1 is positioned relative to the balance bridge 5 and / or the plate 6 of the movement 300, by means of the first positioning element 7a, 7b, within the plane P. This external and / or massive and / or rigid part 12 of the balance spring 1 thus acts as a connecting member of the balance spring 1. The first positioning element is also provided to allow the positioning of the balance bridge 5 relative to the plate 6 within the plane P.

[0024] In this embodiment, the spiral spring, more particularly visible on the figure 2 , comprises a blade 11, the external end of which is integral with the connecting member 12, the rigidity of which is substantially greater than that of the blade 11. The elements 11 and 12 extend along a plane P1 which is parallel or substantially parallel to the plane P within which the movement extends.

[0025] This connecting member 12 comprises a positioning element 13a, 13b for positioning said spiral spring 1 relative to the balance bridge 5 and to the plate 6. This positioning element 13a, 13b is provided to cooperate with the first positioning element 7a, 7b to ensure the positioning of the spiral spring 1 relative to the balance bridge 5 and / or relative to the plate 6.

[0026] In the described embodiment, the positioning element 13a, 13b comprises an opening 13a and an opening 13b. The opening 13a is, for example, a through opening which is in the form of an opening with a circular section. The opening 13b is, for example, a through opening with an oblong section.

[0027] In the described embodiment, the first positioning element 7a, 7b comprises a first component, such as a first screw foot 7a, and a second component, such as a second screw foot 7b.

[0028] The spiral spring 1 further comprises a collet 14 at the internal end of the blade 11, so as to allow the assembly of the spiral spring 1 on the axis 10 in order to constitute the oscillator 100.

[0029] This oscillator 100, in particular axis 10, is pivoted by bearings 50 and 60 mounted respectively on balance bridge 5 and on plate 6.

[0030] In the embodiment described, the connecting member 12 comprises a central portion 121 in the form of a ring portion, the angular extent of which is of the order of 100° with respect to the axis A1. More generally, the central portion in the form of a ring portion could have an angular extent of between approximately 40° and 180°. This central portion is preferably limited radially by two coaxial circle portions centered on the axis A1.

[0031] The member 12 also comprises two bent portions 122a, 122b arranged on either side of the central portion 121, which respectively comprise the opening 13a and 13b each provided to cooperate respectively with the screw feet 7a, 7b so as to position the member 12 relative to the balance bridge 5 and / or relative to the plate 6. The bent portions ensure the mechanical connection of the central portion to one and / or the other of the blanks.

[0032] The member 12 is preferably in the form of a solid and / or rigid plate. The thickness of the plate (measured parallel to the axis A1) is preferably identical or similar to the thickness of the blade 11. The width of the central portion (measured radially to the axis A1) is 3 to 30 times or 5 to 20 times greater than the width of the blade 11. Thus, the member 12 is extremely rigid in the plane P1 compared to the blade 11.

[0033] The spiral spring 1 is preferably in a single-piece form. In other words, the blade 11, the connecting member 12 and the collet 14 are preferably manufactured in a single piece.

[0034] Preferably, the first positioning element 7a, 7b is included in the second blank 6 and the first blank 5 comprises a second positioning element 51a, 51b intended to cooperate with the first positioning element 7a, 7b.

[0035] In the described embodiment, the first positioning element 7a, 7b comprises a screw-foot 7a driven into an opening 61a of the plate 6 at a driving portion 74a, and a screw-foot 7b driven into an opening 61b of the plate 6 at a driving portion 74b. In the described embodiment, the openings 61a and 61b are through openings. However, as an alternative, these openings could be blind.

[0036] When mounting the oscillator 100 within the movement 300, the screw feet 7a, 7b are designed to be housed within the respective openings 13a, 13b. Each screw foot 7a, 7b more particularly comprises a guide portion 71a, 71b which is designed to precisely position the balance spring 1, in particular the connecting member 12 of the balance spring, with respect to the balance bridge 5 and / or the plate 6.

[0037] Advantageously, the dimensions of the guide portions 71a, 71b correspond to the dimensions of the openings 13a, 13b, apart from the assembly clearance. Preferably, the guide portions 71a, 71b are cylindrical or at least partially cylindrical. In the embodiment described, the fact that the opening 13a is circular, while the opening 13b is oblong, advantageously makes it possible to avoid any risk of hyperstaticism during the assembly of the oscillator 100.

[0038] In the described embodiment, the second positioning element 51a, 51b comprises a through opening 51a, in particular a through opening with a circular section, and a through opening 51b, in particular a through opening with an oblong section.

[0039] These through openings 51a, 51b are provided to accommodate the screw feet 7a, 7b. Each screw foot 7a, 7b more particularly comprises a guide portion 72a, 72b which is provided to precisely position, in the plane P, the balance bridge 5 by means of the respective openings 51a, 51b.

[0040] Advantageously, the dimensions of the guide portions 72a, 72b correspond to the dimensions of the openings 51a, 51b, apart from the assembly clearance. Preferably, the guide portions 72a, 72b are cylindrical or at least partially cylindrical. In the embodiment described, the fact that the opening 51a is circular, while the opening 51b is oblong, advantageously makes it possible to avoid any risk of hyperstaticism during the assembly of the first blank.

[0041] The third blank 8 preferably comprises a positioning element 81a, 81b intended to cooperate with the first positioning element 7a, 7b.

[0042] In the described embodiment, the positioning element 81a, 81b comprises a through opening 81a, in particular a through opening with a circular section, and a through opening 81b, in particular a through opening with an oblong section.

[0043] These through openings 81a, 81b are provided to accommodate the screw feet 7a, 7b. Each screw foot 7a, 7b more particularly comprises a guide portion 73a, 73b which is provided to precisely position, in the plane P, the third blank by means of the respective openings 81a, 81b.

[0044] Advantageously, the dimensions of the guide portions 73a, 73b correspond to the dimensions of the openings 81a, 81b, apart from the assembly clearance. Preferably, the guide portions 73a, 73b are cylindrical or at least partially cylindrical. In the embodiment described, the fact that the opening 81a is circular, while the opening 81b is oblong, advantageously makes it possible to avoid any risk of hyperstaticism during the assembly of the third blank.

[0045] Each screw-foot 7a, 7b advantageously combines various functions and thus comprises: a first guide portion 71a, 71b of the spiral spring 1; a second guide portion 72a, 72b of the first blank 5; a third guide portion 73a, 73b of the third blank 8; a driving portion 74a, 74b in the second blank 6; and a tapped hole 75a, 75b provided to accommodate a first fixing element 91a, 91b.

[0046] The screw feet can alternatively be driven into the first draft and / or be fixed in a way other than by driving.

[0047] Thus, more generally, the first positioning element 7a, 7b comprises a first positioning means 71a, 71b of the spiral spring 1 and / or a second positioning means 72a, 72b of the first blank 5 and / or a third positioning means 73a, 73b of the third blank 8 and / or a fourth positioning means 74a, 74b of the second blank 6.

[0048] The guide portions are preferably cylindrical or at least partially cylindrical. Advantageously, the diameter of the guide portion 72a, 72b is smaller than that of the guide portion 71a, 71b. Advantageously, the diameter of the first guide portion 71a, 71b is smaller than that of the guide portion 73a, 73b. Advantageously again, the diameter of the driving portion 74a, 74b is greater than that of the guide portions. For example, the screw foot 7a can be driven into the second blank 6 in the direction z shown in the figures 3 And 4 . For example, the screw-foot 7b can be driven into the second blank 6 in a direction opposite to the z direction.

[0049] The assembly device 200 also comprises elements for fixing the spiral spring 1. More particularly, it comprises the first fixing element 91a, 91b and a second fixing element 7a, 7b, the first fixing element 91a, 91b cooperating with the second fixing element 7a, 7b to fix the spiral spring 1 on the first blank 5 and / or on the second blank 6. The second fixing element 7a, 7b and the first positioning element 7a, 7b can thus be combined or produced on common elements.

[0050] The first fixing element 91a, 91b may comprise at least one first thread and the second fixing element 7a, 7b may comprise at least one second thread or tapped hole 75a, 75b. The fixing is ensured by screwing the first thread into the second thread pressing the spiral spring 1 onto the first blank 5 and / or onto the second blank 6 and / or onto the third blank 8.

[0051] In the described embodiment, the screw feet 7a, 7b act as the first positioning element and the second fixing element. The first fixing element 91a, 91b comprises a screw 91a and a screw 91b.

[0052] The fixing of the oscillator 100 to the rest of the assembly 300, in particular the fixing of the balance spring 1, is thus carried out during the fixing of the balance bridge 5 to the plate 6 by means of screws 91a, 91b provided to be screwed into respective tapped holes 75a, 75b of the screw feet 7a, 7b.

[0053] Advantageously, the first blank 5 and the second blank 6 are arranged and / or configured to keep the spiral spring 1 clamped between them, in particular to keep the spiral spring 1 and a third blank 8 clamped between them.

[0054] To do this, a lower surface 111 of the spiral spring 1 (more particularly visible in figure 4 ) can come into contact or bear against an upper bearing surface 82 of the balance protection bridge 8 whose geometry, according to the plane P, at least partially circumscribes the outer periphery of the balance 9 (see figures 1 And 2 ). The bridge 8 is itself in contact or in abutment against the plate 6. More particularly, a lower surface 83 of the bridge 8 is in contact or in abutment against an upper surface 62 of the plate.

[0055] The upper surface 112 of the connecting member 12 of the balance spring 1 may here be in contact or in abutment against a lower abutment surface 52 of the balance bridge 5. Thus, the position of the balance spring is delimited in a vertical direction z, perpendicular to the plane P, in a first direction oriented on the upper side, by the balance bridge 5, and in a second direction, oriented on the lower side, by the balance protection bridge 8. Alternatively, the position of the balance spring may be delimited in a vertical direction z, perpendicular to the plane P, in a first direction oriented on the upper side, by the protection bridge 8, and in a second direction, oriented on the lower side, by the plate 6.Alternatively, in the absence of a protective bridge, the position of the balance spring can be delimited in a vertical direction z, perpendicular to the plane P, in a first direction oriented on the upper side, by the balance bridge 5, and in a second direction, oriented on the lower side, by the plate 6.

[0056] Preferably, the assembly device 200 comprises a first axial clearance adjustment element 92 and a second axial clearance adjustment element 7b. The first axial clearance adjustment element 92 cooperates with the second axial clearance adjustment element 7b to adjust the axial clearance of the oscillator 100. For example, the first axial clearance adjustment element 92 comprises a nut 92 and the second axial clearance adjustment element 7b comprises a thread 76b. In the described embodiment, the second axial clearance adjustment element 7b takes the form of the screw foot 7b. The screw foot 7b thus comprises a thread 76b.

[0057] Thanks to the solution described, the balance spring 1 is thus positioned relative to the plate, in the plane P, in which the movement 300 extends by the screw feet 7a, 7b, which also make it possible to position the balance bridge 5 in this same plane relative to the plate 6. The balance spring 1 is furthermore fixed to the movement 300 by the fixing means, in particular the screws 91a, 91b, which also make it possible to fix the balance bridge 5 to the plate 6.

[0058] Such a solution makes it possible to integrate a balance-spring assembly 100 within a movement 300 or within an assembly or assembled module which can then be attached to the movement. This integration is independent of any mobile support for fixing a balance spring which can rotate relative to the balance bridge or the plate in the plane of the movement.

[0059] This has the particular advantage of highlighting the central portion 121 of the connecting member 12 of the balance spring, the upper surface 112 of which may include patterns or indications 15. Such patterns or indications 15 may thus be visible or readable once the balance-spring assembly 100 is assembled within the movement 300. These indications or patterns may still be visible in the timepiece if a transparent back is used.

[0060] To ensure such visibility, the connecting member 12 (or external and / or massive and / or rigid part of the spiral spring) may comprise an upper surface 112 having a visible area in a direction parallel to the axis A1 of the oscillator 100: greater than 3 mm 2< or greater than 4 mm 2< , or greater than 6% or 8% of the area of ​​a disc limited by the outer diameter of the balance 9 and centered on the balance 9.

[0061] By "visible area", we mean an area that can be seen by a user in a direction perpendicular to plane P or a direction parallel to the axis of the oscillator, while the movement is completely assembled or the timepiece is completely assembled. In particular, this visible area is not covered, in this direction, by any element of the movement, in particular a blank or an automaton module. Nevertheless, a winding oscillating weight may mask, in this direction, at least partially this visible area in certain configurations of the oscillating weight provided that, in at least one other configuration of the oscillating weight (during operation and / or movement of the movement), the winding oscillating weight does not mask, in this direction, this visible area.

[0062] Thus, such motifs or indications can coexist harmoniously and coherently with motifs or indications formed on other components of the movement, in particular movement sketches.

[0063] These patterns or indications 15 may take the form of a coating applied to the surface 112. Alternatively, these patterns or indications 15 may result from cavities formed from the surface 112. These cavities may be through-cavities. Alternatively, these cavities may be blind. In this case, a decorative material may be deposited within the cavities. This may be, for example, a deposit of a metallic layer, a paint, a lacquer, a varnish or a composite, in particular a luminescent composite.

[0064] In the embodiment described, only the screw-foot 7b comprises a nut 92 at a threaded portion 76b. The position of this nut 92 in the vertical direction z relative to the screw-foot 7b makes it possible to adjust the position of the balance spring 1, the balance bridge 5, and the balance protection bridge 8 in this same direction. Thus, the vertical position of the bearing 50 can be adjusted with respect to the vertical position of the bearing 60, which makes it possible to vary the play or the play of the balance-spring assembly 100, in particular of the axis 10 on which the balance spring 1 is mounted. The oblong conformation of the opening 13b allows in particular such a displacement of the balance spring 1. Furthermore, the displacement of the nut 92 in the vertical direction z can induce a loss of contact between the bridge 8 and the plate 6, in particular between the surface 83 of the bridge 8 and the surface 62 of the plate 6, in an area surrounding the screw-foot 7b as shown in the figure 3In this case, bridge 8 is supported against nut 92.

[0065] Alternatively, the two screw feet 7a, 7b may include nuts at threaded portions so as to adjust the swing of the oscillator.

[0066] In a simplified embodiment, the first positioning element 7a, 7b may be devoid of any means for adjusting the axial movement of the oscillator 100. In this context, a means for adjusting the axial movement of the oscillator 100 may possibly be provided within an additional device, for example arranged at the level of the bearing 50 and / or the bearing 60.

[0067] In the embodiment described above, the first positioning element 7a, 7b is part of the second blank 6 and the first blank 5 comprises a second positioning element 51a, 51b intended to cooperate with the first positioning element 7a, 7b. However, additionally or alternatively, a first positioning element may be included in the first blank, and the second blank may comprise a second positioning element intended to cooperate with the first positioning element.

[0068] In an alternative embodiment, the first positioning element 7a, 7b may comprise two pins. These pins make it possible to position, in the plane P, the balance bridge relative to the plate, and the sprung balance, in particular the balance spring, in the plane P relative to the balance bridge and / or the plate. In this case, the openings 51a, 51b are not necessarily through openings. The balance bridge may be fixed by first fixing means such as screws directly on the plate, and the sprung spring may be fixed to the movement by second fixing means such as screws, possibly different from the first fixing means.

[0069] In a simplified embodiment, the first positioning element 7a, 7b can more simply be in the form of a single component such as a screw-foot 7a or a screw-foot 7b, or a pin.

[0070] In an alternative embodiment, the first positioning element 13a, 13b of the spiral spring may comprise two opening portions which define guide surfaces intended to at least partially match the guide portions 71a, 71b. In a simplified embodiment, the first positioning element 7a, 7b may more simply be in the form of a single opening or opening portion.

[0071] In the embodiment described above, the first blank takes the form of a traversing balance bridge. Of course, the balance bridge can also take the form of a cock.

[0072] In the embodiment described above, the first blank takes the form of a balance bridge and the second blank takes the form of a plate. These blanks are fixed relative to the movement frame. Alternatively, the first and second blanks can be integrated within a module, in particular a tourbillon module or a carousel module attached to a movement frame.

[0073] In the embodiment described above, the spiral spring 1 is in a single-piece form. In other words, the blade 11, the connecting member 12 and the collet 14 are manufactured in a single piece. Alternatively, the spiral spring could be in the form of an assembly, the connecting member 12 being able, for example, to be attached to the blade 11 as described in application JP2016173241.

[0074] In the embodiment described above, the spiral spring 1 comprises a single blade 11. Alternatively, the spiral spring may comprise several blades, in particular two blades.

[0075] The spiral spring may include in whole or in part: monocrystalline silicon regardless of its orientation, polycrystalline silicon, amorphous silicon, amorphous silicon dioxide, doped silicon regardless of the type and level of doping, or porous silicon.

[0076] It may also include in whole or in part: silicon carbide, glass, ceramic, or quartz.

[0077] Alternatively, the balance spring can be made of metal or a metal alloy, in particular a paramagnetic alloy, such as an Nb-Zr based alloy.

[0078] In a simplified embodiment, it is possible to mount the balance spring directly on the plate independently of any balance protection bridge. In this particular case, the lower surface 111 of the balance spring 1 may bear against an upper bearing surface 62 of the plate 6.

[0079] The improvements in the quality and control of the manufacturing and assembly processes of the components taking part in the oscillator combined with the use of an assembly solution according to the invention make it possible to position the center of the balance wheel pin reliably and repeatably independently of any additional adjustment means such as a mobile support for fixing a balance spring, for example, a stud holder.

[0080] It is therefore possible to significantly simplify the assembly devices of a balance-spring oscillator to fix the outer end of a balance spring to blanks which pivot the oscillator, in particular the plate and the balance bridge.

[0081] Such a solution is particularly advantageous in view of its simplicity of implementation and the few components it requires. In particular, it makes it possible to do without a mobile fixing support, in particular a stud holder, stud or flange allowing the fixing of a balance spring to such a mobile support. It also makes it possible to do without a friction element allowing the maintenance of the mobile fixing support in a given angular position. Such a solution is therefore not subject to variations in the angular positions of a mobile fixing support, in particular after an impact. Such a solution also makes it possible to minimize the size, in particular the size along the A1 axis, of a balance-spring oscillator, and also makes it possible to integrate a balance spring with decorative motifs capable of coexisting harmoniously and coherently with other decorative motifs of the movement.

[0082] The hairspring assembly solution described above also makes it possible to optimize the assembly precision of a hairspring balance oscillator within a movement.

[0083] Thanks to the invention, it is therefore possible to propose a device for assembling a balance-spring oscillator, within which the outer end of the balance spring is positioned relative to first and second pivot blanks of the balance-spring oscillator, for example a plate and a balance bridge, by means of positioning means also provided to allow the positioning of the first blank relative to the second blank, for example the positioning of the balance bridge relative to the plate of the movement.

[0084] Thus, the balance spring is positioned relative to the plate with the same means as those which allow the positioning of the balance bridge relative to this same plate. The chain of ribs is thus minimized as much as possible, while taking advantage of already known elements of the movement. The absence of a mobile support for fixing the balance spring also makes it possible to refine the thickness of the movement at the level of the regulating organ, while allowing easy disassembly and reassembly of the balance spring. The absence of such a support also makes it possible to make visible and highlight the outer end of the balance spring, in particular a connecting member according to a specific conformation of the balance spring such as that described in document EP2437126B1.

[0085] According to a second aspect of the invention, an assembly is defined as follows: Assembly 300, in particular a watch movement, comprising: an oscillator 100 comprising a balance 9 and a balance spring 1, a first blank 5 for pivoting the oscillator 100, and a second blank 6 for pivoting the oscillator 100, the balance spring 1 comprising an external and / or massive and / or rigid part 12 of the balance spring provided with an upper surface 112 having a visible area in a direction parallel to an axis A1 of a balance 9 of the oscillator 100: greater than 3 mm 2< or greater than 4 mm 2< , or greater than 6% or 8% of the area of ​​a disc limited by the external diameter of the balance 9 and centered on the balance 9.

[0086] According to a third aspect of the invention, an assembly is defined as follows: Assembly 300, in particular a watch movement, comprising: an oscillator 100 comprising a balance 9 and a balance spring 1, and a pivot plate 6 for the balance 9 comprising a first positioning and / or fixing element 7a, 7b, the balance spring 1, in particular an external and / or massive and / or rigid part 12 of the balance spring, comprising a second positioning element 13a, 13b intended to cooperate with the first positioning and / or fixing element 7a, 7b to directly position and / or fix the balance spring 1 on the plate 6.

[0087] In this third aspect, the assembly preferably comprises a second fixing element, such as a screw, intended to cooperate with the first fixing element to directly fix the spiral spring 1 to the plate 6.

[0088] By "direct positioning and / or fixing of the balance spring on the plate" is meant that the balance spring is positioned and / or fixed on the plate without the interposition of another element and / or without the assistance of another movement blank (such as in particular a protection bridge or a balance bridge or an anchor bridge).

[0089] Preferably, whatever the embodiment, as mentioned previously, the solution proposes an oscillator assembly device improving the integration of the oscillator within a movement, more particularly of a balance spring of the oscillator within the movement, and this independently of any movable fixing support movable in rotation relative to a balance bridge or a plate in the plane of the movement. Thus, preferably, the assembly device does not comprise a movable support for fixing the balance spring movable in rotation relative to a blank in a plane P of the assembly or of the movement.

[0090] Preferably, whatever the embodiment, the assembly does not include an adjustable or movable balance spring, in particular in rotation around the axis A1, relative to a blank in a plane of the movement. Thus, the position of the balance spring is not adjustable in the plane of the movement. This position is defined by the first positioning element 7a, 7b. This means that the first positioning element 7a, 7b positions the balance spring 1, in the plane P, relative to the first blank 5 and / or relative to the second blank 6, without any degree of freedom. There may nevertheless be a slight assembly play between: the spiral spring 1, and the first blank 5 and / or the second blank 6.

[0091] For example, this mounting clearance may be less than 0.05 mm in translation in the P plane and / or less than 1° in rotation in the P plane.

[0092] Unless there is a logical or technical incompatibility, all the characteristics of the first, second and third aspects are combinable.

Claims

1. A device (200) for assembling an oscillator (100) including a spiral spring (1) to an assembly (300) or to a movement (300) of a timepiece (400), the assembly device including: - a first movement-blank (5) for pivoting the oscillator (100), - a second movement-blank (6) for pivoting the oscillator (100), - a first element (7a, 7b) for positioning the first movement-blank (5) relative to the second movement-blank (6), the first positioning element (7a, 7b) being arranged and / or configured so as to position a spiral spring (1) relative to the first movement-blank (5) and / or relative to the second movement-blank (6) in a plane (P) of the assembly (300) or of the movement (300), said assembly device being characterised in that it does not comprise a support movable in rotation relating to a movement-blank (5, 6) in a plane (P) of the assembly (300) or of the movement (300), the support being used for fixing the spiral spring.

2. The assembly device (200) as claimed in the preceding claim, characterised in that: - the first positioning element (7a, 7b) is included in the second movement-blank (6) and the first ébauche (5) includes a second positioning element (51a, 51b) intended to cooperate with the first positioning element (7a, 7b), or - the first positioning element is included in the first ébauche and the second ébauche includes a second positioning element intended to cooperate with the first positioning element.

3. The assembly device (200) as claimed in the preceding claim, characterised in that the second positioning element (51a, 51b) includes a first opening (51a), in particular a first opening with a circular section, and / or a second opening (51b), in particular a second opening with an oblong section.

4. The assembly device (200) as claimed in any one of the preceding claims, characterised in that: - the first ébauche (5) is a balance bridge (5), and / or - the second ébauche (6) is a plate (6).

5. The assembly device (200) as claimed in any one of the preceding claims, characterised in that it includes a third movement-blank (8), the third movement-blank being for example a protection bridge (8) and / or the third movement-blank being for example inserted or disposed between the first and second movement-blanks.

6. The assembly device (200) as claimed in any one of the preceding claims, characterised in that it includes a first fastening element (91a, 91b) and a second fastening element (7a, 7b), the first fastening element (91a, 91b) cooperating with the second fastening element (7a, 7b) to fasten a spiral spring (1) to the first movement-blank (5) and / or to the second movement-blank (6).

7. The assembly device (200) as claimed in the preceding claim, characterised in that the second fastening element (7a, 7b) and the first positioning element (7a, 7b) are merged.

8. The assembly device (200) as claimed in claim 6 or 7, characterised in that the first fastening element (91a, 91b) includes at least one first thread and in that the second fastening element (7a, 7b) includes at least one second thread (75a, 75b), fastening being achieved by screwing the first thread into the second thread to press the spiral spring (1) onto the first movement-blank (5) and / or onto the second movement-blank (6).

9. The assembly device (200) as claimed in any one of the preceding claims, characterised in that the first positioning element (7a, 7b) includes a first means (71a, 71b) for positioning the spiral spring (1) and / or a second means (72a, 72b) for positioning the first movement-blank (5) and / or a third means (73a, 73b) for positioning the third movement-blank (8) and / or a fourth means (74a, 74b) for positioning the second movement-blank (6).

10. The assembly device (200) as claimed in any one of the preceding claims, characterised in that: - the first positioning element (7a, 7b) includes a first screw foot (7a) and / or a second screw foot (7b), and / or in that: - the first movement-blank (5) and the second movement-blank (6) are arranged and / or configured to retain a spiral spring (1) between them, in particular to retain a spiral spring (1) and a third movement-blank (8) between them, and / or in that: - the assembly device includes a first axial clearance adjustment element (92) and a second axial clearance adjustment element (7b), the first axial clearance adjustment element (92) cooperating with the second axial clearance adjustment element (7b) to adjust the axial clearance of an oscillator (100), the first axial clearance adjustment element (92) including for example a nut (92) and the second axial clearance adjustment element (7b) including for example a thread (76b) formed on a screw foot (7b), and / or in that: the first positioning element (7a, 7b) is configured so that to position the spiral spring (1), in the plane (P), relative to the first movement-blank (5) and / or relative to the second movement-blank (6), without any degree of freedom.

11. An assembly (300), in particular a timepiece movement (300), including an assembly device (200) as claimed in any one of the preceding claims and an oscillator (100) including a spiral spring (1), in particular an oscillator (100) including a balance (9) and a spiral spring (1) mounted on a staff (10).

12. The assembly (300) as claimed in the preceding claim, characterised in that the spiral spring (1), in particular an outer and / or solid and / or rigid part (12) of the spiral spring (1), includes a third positioning element (13a, 13b) intended to cooperate with the first positioning element (7a, 7b).

13. The assembly (300) as claimed in the preceding claim, characterised in that the third positioning element (13a, 13b) includes a third opening (13a), in particular a third opening with a circular section, and / or a fourth opening (13b), in particular a fourth opening with an oblong section.

14. The assembly (300) as claimed in one of claims 11 to 13, characterised in that the spiral spring (1) cannot be set or is not movable, notably in rotation, relating to a movement-blank (5, 6) in the plane (P) of the assembly or of the movement.

15. A timepiece (400), in particular a wristwatch (400), including an assembly device (200) as claimed in any one of claims 1 to 10 and / or an assembly (300) as claimed in any one of claims 11 to 14.

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