CH708878A2

CH708878A2 - Together with a peak and a clock gate stud.

Info

Publication number: CH708878A2
Application number: CH01933/13A
Authority: CH
Inventors: Raphaël Courvoisier
Original assignee: Eta Sa Manufacture Horlogère Suisse
Priority date: 2013-11-20
Filing date: 2013-11-20
Publication date: 2015-05-29
Also published as: CH708878B1

Abstract

L’invention concerne un ensemble de maintien d’un ressort-spiral (21) d’horlogerie, comportant un piton et un porte-piton ainsi que des moyens de fixation dudit porte-piton à un mécanisme d’échappement (30). Ledit piton comporte une surface latérale d’appui définissant une direction de maintien ou d’appui dudit ressort-spiral (21). Ledit porte-piton est en deux parties, et comporte une structure rigide (5) porteuse desdits moyens de fixation, et une lame-ressort (8) plaquée contre ladite structure rigide (5) et comportant au moins une lèvre élastique (9) définissant avec ladite structure (5) une chambre (10) de réception dudit piton et coopérant avec ladite surface latérale d’appui dudit piton pour le maintien dudit piton en position indexée et de blocage.The invention relates to a holding assembly of a hairspring spring (21) having a peg and a peg carrier and means for fixing said bolt carrier to an exhaust mechanism (30). Said stud has a lateral bearing surface defining a direction of support or support of said spiral spring (21). Said bolt carrier is in two parts, and comprises a rigid structure (5) carrying said fixing means, and a leaf spring (8) pressed against said rigid structure (5) and comprising at least one elastic lip (9) defining with said structure (5) a chamber (10) for receiving said pin and cooperating with said lateral bearing surface of said pin for maintaining said pin in the indexed and locking position.

Description

Description Description

Domaine de l’invention Field of the invention

[0001 ] L’invention concerne un ensemble de maintien ou d’appui d’un ressort spiral d’horlogerie, comportant un piton et un porte-piton, lequel porte-piton comporte des moyens de fixation dudit porte-piton à un mécanisme d’échappement, et ledit piton comportant au moins une surface d’orientation définissant une direction de maintien ou d’appui d’un dit ressort spiral. The invention relates to a holding or support assembly of a spiral spring clock, comprising a pin and a bolt carrier, which bolt carrier comprises means for fixing said bolt carrier to a mechanism of escapement, and said stud having at least one orientation surface defining a direction of support or support of said spiral spring.

[0002] L’invention concerne encore un mécanisme d’échappement d’horlogerie comportant au moins un tel ensemble de maintien. The invention also relates to a watch exhaust mechanism comprising at least one such holding assembly.

[0003] L’invention concerne encore un mouvement d’horlogerie comportant au moins un tel mécanisme d’échappement. [0004] L’invention concerne encore une pièce d’horlogerie comportant au moins un tel mouvement. The invention also relates to a watch movement comprising at least one such escape mechanism. The invention also relates to a timepiece comprising at least one such movement.

[0005] L’invention concerne le domaine des mécanismes d’échappement d’horlogerie. The invention relates to the field of watchmaking exhaust mechanisms.

Arrière-plan de l’invention Background of the invention

[0006] Sur de nombreux calibres de très grandes série, le piton, constituant le point d’attache externe du ressort-spiral, est clipé sur un porte-piton qui est une pièce plate étampée. On many calibers of very large series, the stud, constituting the external attachment point of the spiral spring, is clipped on a bolt carrier which is a stamped flat piece.

[0007] Sur des réalisations haut de gamme, le piton est vissé dans un porte-piton qui est un composant usiné. La vis de fixation travaille alors entre son pied et ses filets. La tête n’est jamais bloquée, ce qui entraîne des casses régulières, suite aux efforts de torsion subis lorsque le pied est bloqué sur le piton, et quand l’opérateur continue à visser. On high-end achievements, the bolt is screwed into a bolt carrier which is a machined component. The fixing screw then works between his foot and his nets. The head is never blocked, resulting in regular breakages, following the torsional forces experienced when the foot is blocked on the peak, and when the operator continues to screw.

Résumé de l’invention Summary of the invention

[0008] L’invention se propose de fournir une solution de maintien de la spire externe du spiral, qui soit compatible avec des mouvements haut de gamme, et de résoudre le problème récurrent de tenue des vis par une solution de fixation exempte de vis. The invention proposes to provide a solution for maintaining the outer turn of the hairspring, which is compatible with high-end movements, and to solve the recurring screw holding problem by a fastener solution free of screws.

[0009] A cet effet, l’invention concerne un ensemble de maintien ou d’appui d’un ressort spiral d’horlogerie, comportant un piton et un porte-piton, lequel porte-piton comporte des moyens de fixation dudit porte-piton à un mécanisme d’échappement, ledit piton comportant au moins une surface d’orientation définissant une direction de maintien ou d’appui d’un dit ressort spiral, caractérisé en ce que ledit porte-piton est en deux parties, et comporte une structure rigide porteuse desdits moyens de fixation, et une lame-ressort plaquée contre ladite structure rigide et comportant au moins une lèvre élastique définissant avec ladite structure une chambre de réception dudit piton et coopérant avec ladite au moins une surface d’orientation dudit piton pour le maintien dudit piton en position indexée et de blocage. For this purpose, the invention relates to a holding or support assembly of a spiral spring watchmaking, comprising a pin and a bolt carrier, which bolt carrier comprises means for fixing said bolt carrier an escape mechanism, said stud having at least one orientation surface defining a direction of support or support of a said spiral spring, characterized in that said bolt carrier is in two parts, and comprises a structure rigid carrier of said fixing means, and a spring-blade pressed against said rigid structure and having at least one elastic lip defining with said structure a receiving chamber of said pin and cooperating with said at least one surface of said pin for maintaining said peg in indexed position and blocking.

[0010] Selon une caractéristique de l’invention, ladite surface latérale d’appui constitue une surface d’orientation qui définit une direction unique de l’extrémité externe dudit ressort spiral. According to a feature of the invention, said lateral bearing surface constitutes an orientation surface which defines a single direction of the outer end of said spiral spring.

[0011 ] L’invention concerne encore un mécanisme d’échappement d’horlogerie comportant au moins un tel ensemble de maintien. The invention also relates to a watch exhaust mechanism comprising at least one such holding assembly.

[0012] L’invention concerne encore un mouvement d’horlogerie comportant au moins un tel mécanisme d’échappement. The invention also relates to a watch movement comprising at least one such escape mechanism.

[0013] L’invention concerne encore une pièce d’horlogerie comportant au moins un tel mouvement, caractérisée en ce que ladite pièce est une montre. The invention further relates to a timepiece comprising at least one such movement, characterized in that said piece is a watch.

Description sommaire des dessins Brief description of the drawings

[0014] D’autres caractéristiques et avantages de l’invention apparaîtront à la lecture de la description détaillée qui va suivre, en référence aux dessins annexés, où: la fig. 1 représente, de façon schématisée, partielle et en perspective, un mécanisme d’échappement comportant un ensemble de maintien de ressort-spiral selon l’invention, dans une position de présentation du piton, porteur de la spire externe du spiral, au niveau d’une section d’introduction de cet ensemble de maintien, qui est fixé sur une structure du mécanisme d’échappement telle un coq de balancier; la fig. 2 représente, de façon schématisée et en perspective éclatée, cet ensemble de maintien, comportant une structure rigide dans une première variante d’épaisseur constante, une lame-ressort, et le piton agencé pour coopérer avec cet ensemble; la fig. 3 représente, de façon schématisée et en perspective, la lame-ressort de la fig. 2; la fig. 4 représente, de façon schématisée et en perspective, une structure rigide dans une deuxième variante sur deux niveaux; Other features and advantages of the invention will appear on reading the detailed description which follows, with reference to the accompanying drawings, in which: FIG. 1 represents, schematically, partially and in perspective, an exhaust mechanism comprising a spiral spring holding assembly according to the invention, in a position of presentation of the stud, carrying the outer coil of the spiral, at the level of an introduction section of this holding assembly, which is fixed on a structure of the escapement mechanism such as a balance cock; fig. 2 represents, schematically and in exploded perspective, this holding assembly, comprising a rigid structure in a first variant of constant thickness, a leaf spring, and the pin arranged to cooperate with this assembly; fig. 3 represents, schematically and in perspective, the leaf spring of FIG. 2; fig. 4 represents, schematically and in perspective, a rigid structure in a second variant on two levels;

2 la fig. 5 est un schéma-blocs représentant une pièce d’horlogerie comportant un mouvement lequel comporte un mécanisme d’échappement incluant un ressort-spiral maintenu par un ensemble selon l’invention. 2 fig. 5 is a block diagram showing a timepiece comprising a movement which comprises an escapement mechanism including a spiral spring held by an assembly according to the invention.

Description détaillée des modes de réalisation préférés Detailed Description of the Preferred Embodiments

[0015] Pour éliminer le maintien du piton par vis, l’invention recourt à un élément de fixation comportant des moyens de rappel élastique pour, d’une part autoriser l’introduction ou l’extraction d’un piton en exerçant sur lui un certain effort, et d’autre part maintenir ce piton en position de fonctionnement dans une position unique de butée To eliminate the maintenance of the stud by screw, the invention uses a fastening element comprising elastic return means for, firstly allow the introduction or extraction of a stud by exerting on him a certain effort, and secondly maintain this pin in operating position in a single stop position

[0016] L’invention concerne ainsi un ensemble 20 de maintien ou d’appui d’un ressort spiral 21 d’horlogerie, comportant un piton 1 et un porte-piton 2. Ce porte-piton 2 comporte des moyens de fixation 6 du porte-piton 2 à un mécanisme d’échappement 30, tel un coq de balancier, tel que visible sur la fig. 1. The invention thus relates to an assembly 20 for holding or supporting a spiral spring 21 of timepieces, comprising a pin 1 and a stud holder 2. This stud holder 2 comprises fixing means 6 of the bolt carrier 2 to an escapement mechanism 30, such as a pendulum cock, as shown in FIG. 1.

[0017] Le piton 1 comporte au moins une surface latérale d’appui 7 définissant une direction de maintien ou d’appui d’un tel ressort spiral 21 , The pin 1 comprises at least one lateral bearing surface 7 defining a direction of support or support of such a spiral spring 21,

[0018] Selon l’invention, ce porte-piton 2 est en au moins deux parties, et comporte une structure rigide 5 porteuse des moyens de fixation 6, et une lame-ressort 8 plaquée contre cette structure rigide 5. Cette lame-ressort 8 comporte au moins une lèvre élastique 9 définissant avec la structure rigide 5 une chambre 10 de réception du piton 1. Cette lèvre élastique 9 coopère avec cette au moins une surface latérale d’appui 7 du piton 1 , pour le maintien du piton 1 en position indexée et de blocage. En somme, le piton 1 est pincé entre la lèvre élastique 9 de la lame-ressort 8, et une encoche 53 de la structure rigide 5, visible sur la fig. 2. According to the invention, this stud holder 2 is in at least two parts, and comprises a rigid structure 5 carrying fastening means 6, and a spring-blade 8 pressed against this rigid structure 5. This blade-spring 8 comprises at least one elastic lip 9 defining with the rigid structure 5 a receiving chamber 10 of the pin 1. This elastic lip 9 cooperates with this at least one lateral bearing surface 7 of the pin 1, for the maintenance of the pin 1 in indexed and blocking position. In sum, the pin 1 is pinched between the elastic lip 9 of the leaf spring 8, and a notch 53 of the rigid structure 5, visible in FIG. 2.

[0019] De préférence, la surface latérale d’appui 7 constitue une surface d’orientation qui définit une direction unique de l’extrémité externe du ressort spiral 21. Preferably, the lateral bearing surface 7 constitutes an orientation surface which defines a single direction of the outer end of the spiral spring 21.

[0020] L’invention est illustrée dans une réalisation préférée où le porte-piton 2 est en deux parties, qui est économique car chacun des deux composants qu’il comporte est très simple à réaliser, et parfaitement compatible avec des tailles de séries importantes. Ce porte-piton 2 en deux parties, est, encore, d’un encombrement minimal. En effet, de préférence, et tel que visible sur les figures, la lame-ressort 8 enveloppe, au moins partiellement, la structure rigide 5, et l’encombrement total, selon la direction D de l’axe de pivotement du balancier, est le total entre l’épaisseur totale de la structure rigide 5, et l’épaisseur d’une feuille de tôle dans laquelle est préférentiellement formée la lame-ressort 8. The invention is illustrated in a preferred embodiment where the bolt carrier 2 is in two parts, which is economical because each of the two components it comprises is very simple to perform, and perfectly compatible with large series sizes . This bolt carrier 2 in two parts, is still a minimum footprint. Indeed, preferably, and as visible in the figures, the leaf spring 8 envelops, at least partially, the rigid structure 5, and the total space, in the direction D of the pivot axis of the balance, is the total between the total thickness of the rigid structure 5, and the thickness of a sheet metal sheet in which the leaf spring 8 is preferably formed.

[0021 ] La lame-ressort 8 illustrée en fig. 1 , 2 et 3, est de préférence en tôle découpée et pliée, elle ne nécessite aucun autre usinage particulier. Elle est peu coûteuse, ce qui permet d’utiliser, avec une même structure porteuse 31 du mécanisme d’échappement 30, et avec une même structure rigide 5, plusieurs lames-ressort 8 de dimensionnements différents pour coopérer avec autant de modèles de pitons de géométries différentes. The leaf spring 8 illustrated in FIG. 1, 2 and 3, is preferably sheet metal cut and folded, it does not require any other particular machining. It is inexpensive, which makes it possible to use, with the same carrying structure 31 of the exhaust mechanism 30, and with the same rigid structure 5, several spring blades 8 of different sizes to cooperate with so many models of pitons. different geometries.

[0022] La structure rigide 5 peut, selon son dimensionnement, être usinée, ou également réalisée par étampage dans un matériau plus épais et plus rigide que la lame-ressort 8. La fig. 2 montre une première variante d’épaisseur constante, très économique, qui se prête à une telle réalisation étampée. La fig. 4 montre une deuxième variante de structure rigide 5 sur deux niveaux, qui est préférablement usinée. The rigid structure 5 may, depending on its dimensioning, be machined, or also made by stamping in a thicker and more rigid material than the leaf spring 8. FIG. 2 shows a first variant of constant thickness, very economical, which lends itself to such a stamped embodiment. Fig. 4 shows a second variant of rigid structure 5 on two levels, which is preferably machined.

[0023] L’assemblage de l’ensemble de maintien 20 selon l’invention permet de simplifier l’usinage et la réalisation du porte-piton, car il n’est plus nécessaire, contrairement à l’art antérieur, de réaliser un alésage ou un logement similaire pour la réception du piton 1 , ni de taraudage pour coopérer avec une vis de blocage. The assembly of the holding assembly 20 according to the invention simplifies the machining and the realization of the bolt carrier, because it is no longer necessary, unlike the prior art, to make a bore or a similar housing for receiving the pin 1, or tapping to cooperate with a locking screw.

[0024] Les variantes de réalisation, non limitatives, illustrées par les figures, autorisent une grande facilité d’assemblage, conjuguée à un bas coût de fabrication. Non-limiting embodiments, illustrated by the figures, allow great ease of assembly, combined with a low manufacturing cost.

[0025] De préférence, le piton 1 comporte, de part et d’autre de la au moins une surface latérale d’appui 7 qu’il comporte pour définir l’orientation de l’extrémité externe du spiral 21 , des surfaces d’arrêt 1 1 , 12, pour limiter le débattement de ce piton 1 selon la direction D de l’axe du ressort-spiral 21 par rapport à la pince constituée par l’ensemble de la structure rigide 5 et de la lame-ressort 8. Dans la variante illustrée, la lèvre élastique 9 de la lame-ressort 8 a deux surfaces de bord 91 et 92 qui sont parallèles (et situées chacune dans un plan perpendiculaire à la direction D) et coopère avec cette surface latérale d’appui 7, qui est ici constituée par un plat 16, délimité par ces surfaces d’arrêt 1 1 et 12. De façon préférée, dans les différentes variantes présentées, la surface latérale d’appui 7 est un plat 16 parallèle à l’axe D du ressort-spiral 21. Preferably, the stud 1 comprises, on either side of the at least one lateral bearing surface 7 that it comprises to define the orientation of the outer end of the spiral 21, surfaces of stop 1 1, 12, to limit the movement of this peg 1 in the direction D of the axis of the spring-hairspring 21 relative to the clamp formed by the entire rigid structure 5 and the leaf spring 8. In the variant illustrated, the elastic lip 9 of the leaf spring 8 has two edge surfaces 91 and 92 which are parallel (and each located in a plane perpendicular to the direction D) and cooperates with this lateral bearing surface 7, which is here constituted by a plate 16, delimited by these stop surfaces 1 1 and 12. Preferably, in the various variants shown, the lateral bearing surface 7 is a flat 16 parallel to the axis D of the spring -spiral 21.

[0026] Dans une version indéréglable, on peut définir l’écart E1 entre les surfaces d’arrêt 11 et 12 égal à l’écart E entre ces surfaces d’arrêt 1 1 et 12 pour un maintien sans jeu axial. Ainsi, dans cette version indéréglable, cette au moins une surface latérale d’appui 7 est ajustée aux surfaces d’arrêt 1 1 , 12, pour définir une position unique du piton 1 selon la direction de l’axe D du ressort-spiral 21. In a foolproof version, it is possible to define the distance E1 between the stop surfaces 11 and 12 equal to the distance E between these stop surfaces 1 1 and 12 for holding without axial play. Thus, in this foolproof version, this at least one lateral bearing surface 7 is fitted to the stop surfaces 1 1, 12, to define a single position of the stud 1 in the direction of the axis D of the spiral spring 21 .

[0027] Dans une autre variante, on peut laisser un certain jeu autorisant un réglage axial limité du piton 1 , en choisissant l’écart E1 supérieur à l’écart E, de la valeur de la plage de réglage souhaitée. In another variant, we can leave a certain clearance allowing a limited axial adjustment of the piton 1, choosing the difference E1 greater than the distance E, the value of the desired range of adjustment.

[0028] Dans une autre variante encore, le piton 1 ne comporte pas de surface d’arrêt, sur au moins un côté selon la direction D. In another variant, the pin 1 has no stop surface on at least one side in the direction D.

3 3

Claims

To facilitate the introduction or extraction of the pin 1 relative to this holding assembly 20, the rigid structure 5 and / or the spring blade 8 comprises an introduction ramp 13, 14, for the introduction tangentially (from the arrow in FIG 1), or conversely the tangential extraction, of the piton 1 between the rigid structure 5 and the leaf spring 8. This simple or compound ramp facilitates this insertion in the chamber 10 to encountering the elastic return force of the leaf spring 8. It is the same for the extraction. When the pin 1 is pressed against this ramp and the spring blade 8, it is easy to lift the elastic lip 9, to allow the pin to reach its position mounted in the chamber 10 delimited by a notch 15 forming a threshold. introduction or extraction. On the illustrated variants, the chamber 10 is located on the side of the leaf spring 8, in a clearance 80 visible in FIG. 3, the pin 1 bearing on a rear face 93 of the elastic lip 9, and on the side of the rigid structure 5, in a notch 53. This notch 53 is delimited on the one hand by an input sector, preferably radiated, constituting such a ramp 13, and secondly by a flat 51. This plate 51 may, according to the embodiment chosen, or remain at a distance from the elastic lip 9, or, as illustrated in FIG. fig. 3, receive in support a portion 94 of the elastic lip 9, only one end 95 cantilever cooperating in abutment with the pin 1. Other variants are conceivable without departing from the invention, which consists of pinch the peak between a rigid structure and an elastic spring blade. The chamber 10 is designed, in all variants, to immobilize the stud 1 in a single position in projection in a plane perpendicular to the axis D. Preferably, the rigid structure 5 and / or the leaf spring 8 comprises a notch 15 at the chamber 10, corresponding to the threshold of introduction or extraction. For the optimal relative positioning between the rigid structure 5 and the leaf spring 8, in an advantageous embodiment illustrated in the figures, the rigid structure 5 comprises a notch 17 (or a slot, or the like) or a pin arranged for cooperate with a lug 18 or respectively a notch that comprises the spring-blade 8, to rigidly rotate the rigid structure 5 and the leaf-spring 8 pressed one on the other. In a variant not shown, the leaf spring may also comprise at least three tabs bent at 90 ° as the elastic blade 9, and located on a bore 81 or a peripheral rim 82 of the leaf spring 8, arranged to cooperate with a bore 58 or a peripheral rim 59 of the rigid structure 5, to ensure their perfectly coaxial assembly. This relative positioning makes it possible to synchronize the rigid structure 5 and the leaf spring 8, either during their assembly, or in a setting phase if it is decided to leave a restricted angular mobility to the holding assembly 20 for angular adjustment of the position of the pin 1. Naturally, the mechanism then requires at least means for maintaining in position this assembly 20 with respect to the structure 31. Preferably, the rigid structure 5 is of substantially annular shape for maintaining it in abutment on a structure 31, in particular a rocker cock, of the exhaust mechanism 30, around the axis D of the spiral spring 21. Preferably, the leaf spring 8 is of substantially annular shape for maintaining it in abutment between such a structure 31 and the rigid structure 5, or else resting on the rigid structure 5 over their entire common periphery, around the outside. D-axis of the spiral spring 21. Advantageously, the rigid structure is mounted on the structure 31 so as to trap the leaf spring 8. In an economical embodiment, the rigid structure 5 comprises at least one face 51, 52, perpendicular to the axis D of said spiral spring 21, and preferably this rigid structure 5 comprises two faces 51, 52, parallel between they are perpendicular to the axis D of the spiral spring 21. The particular case of the rigid structure 5 on two levels of FIG. 4 allows compatibility with an exhaust mechanism originally equipped with a traditional screw bolt carrier, its higher manufacturing cost is offset by the advantage offered by a better guidance of the bolt 1, on a larger height. The invention also relates to a watchmaking escapement mechanism comprising at least one such holding assembly 20. The invention also relates to a watch movement 40 comprising at least one such exhaust mechanism 30. The invention also relates to a timepiece 50 comprising at least one such movement 40. More particularly, this piece 50 is a watch. In short, the invention provides various advantages: - The screw of a traditional bolt carrier screw is replaced by a cut component, inexpensive; the machining of the rigid structure forming a bolt carrier is greatly simplified, or even replaced by stamping; the mechanism is of an aesthetic and quality level compatible with high-end watch movements; an axial adjustment of the piton remains possible; the mechanism according to the invention is interchangeable, in an existing movement, with a traditional bolt carrier. claims 1. Assembly (20) for holding or supporting a spiral spring (21) watchmaking, comprising a peg (1) and a peg carrier (2), which peg carrier (2) comprises means of attaching (6) said bolt carrier (2) to an exhaust mechanism 4 (30), said stud (1) having at least one lateral bearing surface (7) defining a direction of support or support of a said spiral spring (21), characterized in that said bolt carrier ( 2) is in two parts, and comprises a rigid structure (5) carrying said fixing means (6), and a leaf spring (8) pressed against said rigid structure (5) and comprising at least one elastic lip (9) defining with said structure (5) a chamber (10) for receiving said pin (1) and cooperating with said at least one lateral bearing surface (7) of said pin (1) for maintaining said pin (1) in the indexed position and blocking.

2. Assembly (20) according to the preceding claim, characterized in that said lateral bearing surface (7) constitutes an orientation surface which defines a single direction of the outer end of said spiral spring (21).

3. Assembly (20) according to claim 1 or 2, characterized in that said stud (1) comprises, on either side of said at least one lateral bearing surface (7), stop surfaces ( 11; 12) for limiting the travel of said pin (1) in the direction of the axis of said spiral spring (21).

4. Assembly (20) according to the preceding claim, characterized in that said at least one lateral bearing surface (7) is fitted to said stop surfaces (11; 12) to define a single position of said peak (1) according to the direction of the axis (D) of said spiral spring (21).

5. Assembly (20) according to one of the preceding claims, characterized in that said rigid structure (5) and / or said leaf spring (8) comprises an introduction ramp (13; 14) for the tangential introduction said peg (1) between said rigid structure (5) and said leaf spring (8) and its insertion into said chamber (10) against the elastic return force of said leaf spring (8).

6. Assembly (20) according to one of the preceding claims, characterized in that said rigid structure (5) and / or said leaf spring (8) comprises a notch (15) at said chamber (10).

7. Assembly (20) according to one of the preceding claims, characterized in that said lateral bearing surface (7) is a flat (16) parallel to the axis (D) of said spiral spring (21).

8. Assembly (20) according to one of the preceding claims, characterized in that said rigid structure (5) comprises a notch (17) or a lug (18) arranged to cooperate with a lug (18) or a notch ( 17) that comprises said spring-blade (8) for securing in rotation said rigid structure (5) and said leaf-spring (8) pressed one on the other.

9. Assembly (20) according to one of the preceding claims, characterized in that said rigid structure (5) is substantially annular in shape for its support bearing on a structure (31) of said exhaust mechanism (30), around of the axis (D) of said spiral spring (21).

10. Assembly (20) according to one of the preceding claims, characterized in that said leaf spring (8) is substantially annular in shape for its support in abutment between a structure (31) of said exhaust mechanism (30) and said rigid structure (5), or bearing on said rigid structure (5) over their entire periphery, about the axis (D) of said spiral spring (21).

11. Assembly (20) according to one of the preceding claims, characterized in that said rigid structure (5) comprises at least one face (51; 52) perpendicular to the axis (D) of said spiral spring (21).

12. Assembly (20) according to the preceding claim, characterized in that said rigid structure (5) has two faces (51; 52) parallel to each other and perpendicular to the axis (D) of said spiral spring (21).

13. Watch exhaust mechanism (30) comprising at least one assembly (20) according to one of the preceding claims.

14. Watch movement (40) comprising at least one exhaust mechanism (30) according to the preceding claim.

15. Timepiece (50) comprising at least one movement (40) according to the preceding claim, characterized in that it is a watch. 5